WO2014067129A1

WO2014067129A1 - Multi-coupled heat pump air-conditioning system and method of controlling multi-coupled heat pump air-conditioning system

Info

Publication number: WO2014067129A1
Application number: PCT/CN2012/083981
Authority: WO
Inventors: 刘敏; 曹培春; 李亚军; 朱小磊
Original assignee: 青岛海信日立空调***有限公司
Priority date: 2012-10-31
Filing date: 2012-11-02
Publication date: 2014-05-08
Also published as: CN102927715A; EP2916082A4; EP2916082B1; EP2916082A1; CN102927715B

Abstract

Disclosed are a multi-coupled heat pump air-conditioning system and a method of controlling a multi-coupled heat pump air-conditioning system. The method comprises: after a convergence unit performs gas-liquid separation and compression of coolant outputted by a third end of a switching unit, outputting same to a first end of the switching unit; under the operating modes of cooling and dehumidifying without a temperature drop, driving refrigerant outputted by a second end of the switching unit to successively flow through a first heat exchange unit and a second electronic expansion valve (11), a second heat exchanger (13), a third electronic expansion valve (17), and a third heat exchanger (14), flow back into a fourth end of the switching unit via a first shutoff valve (8), and then be outputted from the third end; under the operating mode of heating, driving refrigerant outputted by the fourth end of the switching unit to successively flow through the third heat exchanger (14), the third electronic expansion valve (17), the second heat exchanger (13), and the second electronic expansion valve (11), flow back to the second end of the switching unit via a second shutoff valve (9) and a first heat exchange unit, and then be outputted from the third end. System costs can be lowered and the control precision of a multi-coupled heat pump air-conditioning system can be improved by applying the present invention.

Description

多联机热泵空调***及控制多联机热泵空调***的方法 Multi-line heat pump air conditioning system and method for controlling multi-line heat pump air conditioning system

技术领域 Technical field

本发明涉及多联机空调控制技术，尤其涉及一种多联机热泵空调***及控制多联机热泵空调***的方法。背景技术 The invention relates to a multi-line air conditioning control technology, in particular to a multi-line heat pump air conditioning system and a method for controlling a multi-line heat pump air conditioning system. Background technique

随着人们生活水平的不断提高，通过在居住和室内工作环境下安装空调***，用以提升居住和工作环境的舒适性，成为人们提高舒适性需求的一个重要选择。其中，多联机热泵空调技术由于具有控制自由、高效节能、便于安装维护等优点，是中央空调发展的一个重要方向。 As people's living standards continue to improve, the installation of an air conditioning system in residential and indoor work environments to enhance the comfort of living and working environments is an important choice for people to improve their comfort needs. Among them, the multi-line heat pump air conditioning technology is an important direction for the development of central air conditioning because of its advantages of freedom of control, high efficiency, energy saving, ease of installation and maintenance.

图 1为现有多联机热泵空调***结构示意图。参见图 1 , 该多联机热泵空调***一般由一台或多台室外机 01、一台或多台室内机 02、中央控制网络（CS-NET ) 03、制冷剂管路 04、分歧管 05以及通信线 06组成，多台室外机组成室外机组，中央控制网络通过通信线对室外机组进行控制，室外机通过制冷剂管路与分歧管，分歧管与室内机相连。其中， Figure 1 is a schematic view showing the structure of a conventional multi-connected heat pump air conditioning system. Referring to FIG. 1, the multi-connected heat pump air conditioning system generally comprises one or more outdoor units 01, one or more indoor units 02, a central control network (CS-NET) 03, a refrigerant line 04, a branch tube 05, and The communication line 06 is composed of a plurality of outdoor units forming an outdoor unit, and the central control network controls the outdoor unit through a communication line, and the outdoor unit passes through the refrigerant line and the branch pipe, and the branch pipe is connected to the indoor unit. among them,

室外机一般由室外侧换热器、压缩机和其它制冷附件组成，室外侧换热器一般采用风冷或水冷的换热形式；室内机由风机和换热器等组成，一般采用直接蒸发换热的形式。与多台家用空调相比，多联机热泵空调*** 的室外机共用，可有效降低设备成本，并可实现各室内机的集中管理，可单独启动一台室内机运行，也可同时启动多台室内机运行，使得控制更加灵活。 The outdoor unit is generally composed of an outdoor side heat exchanger, a compressor and other refrigeration accessories. The outdoor side heat exchanger generally adopts an air-cooled or water-cooled heat exchange form; the indoor unit is composed of a fan and a heat exchanger, and generally adopts direct evaporation. Hot form. Compared with multiple household air conditioners, the outdoor unit of the multi-line heat pump air conditioning system can effectively reduce the equipment cost and realize centralized management of each indoor unit. It can start an indoor unit separately or start multiple indoors at the same time. Machine operation makes control more flexible.

多联机热泵空调***的室内机对空气进行处理时，需要对空气的温度和湿度进行调节和控制，其中，湿度控制难度更大。现有的多联机热泵空调***，采用对室内湿度进行控制的降温除湿方法，然而，采用该方法，一方面，过度降低送风温度导致多联机热泵空调***能耗高、且蒸发温度降低，而蒸发温度的降低又将导致多联机热泵空调***能效比降低；另一方面，在梅雨季节进行降温除湿，将导致送风的冷吹风感强烈，为避免冷吹风感强烈对用户造成的不舒适性，需要在室内机增加电加热丝，以对送风加热升温，进一步增加了多联机热泵空调***的能耗。 When the indoor unit of the multi-connected heat pump air conditioning system processes the air, it is necessary to adjust and control the temperature and humidity of the air. Among them, the humidity control is more difficult. The existing multi-line heat pump air conditioning system adopts a cooling and dehumidifying method for controlling indoor humidity. However, by adopting this method, on the one hand, excessively lowering the supply air temperature results in high energy consumption of the multi-line heat pump air conditioning system, and the evaporation temperature is lowered. The decrease of evaporating temperature will lead to a decrease in the energy efficiency ratio of the multi-connected heat pump air conditioning system. On the other hand, cooling and dehumidifying during the rainy season will result in a strong sense of cold air blowing, which will cause strong discomfort to the user. It is necessary to increase the electric heating wire in the indoor unit to heat the air supply heating, further increasing the energy consumption of the multi-line heat pump air conditioning system.

为避免多联机热泵空调***进行除湿时， ***功耗较高、制冷性能较低的技术问题，现有技术提出了一种改进方法，即在多联机热泵空调*** 的室内机部分增加再热换热器，该再热换热器实际上是一个冷凝器，利用从室外侧换热器流过来的高温高压的制冷剂流经该再热换热器，从而将热量排入回风中，另一部分回风经蒸发器降温除湿后与该部分被加热的回风混合后送入室内，从而实现不降温的功能，或者，通过开发专用除湿电磁阔或增加多个电磁阔以实现不降温的功能。然而，该改进方法一方面需要在室内机额外增加再热换热器，使得***成本增加；另一方面，采用专用除湿电磁阔或多个电磁阔，使得多联机热泵空调***的控制难度增加且控制精度难以得到保证。发明内容 In order to avoid dehumidification of the multi-line heat pump air conditioning system, the system consumes more power and has better cooling performance. Low technical problem, the prior art proposes an improved method of adding a reheat heat exchanger to the indoor unit of the multi-line heat pump air conditioning system, the reheat heat exchanger is actually a condenser, utilizing from the outdoor side The high temperature and high pressure refrigerant flowing from the heat exchanger flows through the reheat heat exchanger to discharge the heat into the return air, and the other part of the return air is cooled and dehumidified by the evaporator, and then mixed with the heated return air. Into the room, so as to achieve the function of not cooling, or by developing a dedicated dehumidification electromagnetic wide or increase the number of electromagnetic wide to achieve the function of no cooling. However, on the one hand, the improved method requires an additional reheat heat exchanger in the indoor unit to increase the system cost; on the other hand, the use of a dedicated dehumidification electromagnetic wide or a plurality of electromagnetic wide limits makes the control of the multi-connected heat pump air conditioning system more difficult and Control accuracy is difficult to guarantee. Summary of the invention

本发明的实施例提供一种多联机热泵空调***，降低***成本、提高多联机热泵空调***的控制精度。 Embodiments of the present invention provide a multi-line heat pump air conditioning system that reduces system cost and improves control accuracy of a multi-line heat pump air conditioning system.

本发明的实施例还提供一种控制多联机热泵空调***的方法，降低系统成本、提高多联机热泵空调***的控制精度。 Embodiments of the present invention also provide a method of controlling a multi-line heat pump air conditioning system, which reduces system cost and improves control accuracy of a multi-line heat pump air conditioning system.

为达到上述目的，本发明实施例提供的一种多联机热泵空调***，该 ***包括：室外机以及室内机，其中， In order to achieve the above object, a multi-line heat pump air conditioning system according to an embodiment of the present invention includes: an outdoor unit and an indoor unit, wherein

室外机包括：控制单元、汇流单元、切换单元以及第一换热单元；室内机包括：室内侧风扇、第二电子膨胀阔、第二换热器、第三电子膨胀阔以及第三换热器； The outdoor unit includes: a control unit, a sink unit, a switching unit, and a first heat exchange unit; the indoor unit includes: an indoor side fan, a second electronic expansion wide, a second heat exchanger, a third electronic expansion wide, and a third heat exchanger ;

控制单元，用于在多联机热泵空调***处于制冷工况时，控制第一换热单元中的第一换热器为冷凝器，室内机中的第二换热器与第三换热器均为蒸发器；在多联机热泵空调***处于制热工况时，控制第一换热单元中的第一换热器为蒸发器，室内机中的第二换热器与第三换热器均为冷凝器；在多联机热泵空调***处于不降温除湿工况时，控制第一换热单元中的第一换热器与室内机中的第二换热器均为冷凝器，室内机中的第三换热器为蒸发器； a control unit, configured to control a first heat exchanger in the first heat exchange unit as a condenser, and a second heat exchanger and a third heat exchanger in the indoor unit when the multi-line heat pump air conditioning system is in a cooling condition Is an evaporator; when the multi-line heat pump air conditioning system is in a heating condition, the first heat exchanger in the first heat exchange unit is controlled as an evaporator, and the second heat exchanger and the third heat exchanger in the indoor unit are both a condenser; when the multi-line heat pump air conditioning system is in a temperature-free dehumidification condition, the first heat exchanger in the first heat exchange unit and the second heat exchanger in the indoor unit are both condensers, in the indoor unit The third heat exchanger is an evaporator;

切换单元，用于当多联机热泵空调***处于制冷以及不降温除湿工况时，控制切换单元的第一端与第二端连通，第三端与第四端连通，第一端接收汇流单元的输出，由第二端输出至第一换热单元，第四端接收室内机的输出，由第三端输出至汇流单元；当多联机热泵空调***处于制热工况时，控制切换单元的第一端与第四端连通，第二端与第三端连通，第一端接收汇流单元的输出，由第四端输出至室内机的第一端，第二端接收第一换热单元的输出，由第三端输出至汇流单元； a switching unit, configured to: when the multi-connected heat pump air conditioning system is in a cooling state and not in a dehumidifying condition, the first end of the control switching unit is in communication with the second end, the third end is in communication with the fourth end, and the first end receives the confluence unit The output is output from the second end to the first heat exchange unit, the fourth end receives the output of the indoor unit, and is output from the third end to the sink unit; when the multi-connected heat pump air conditioning system is in the heating condition, the control switch unit is One end is connected to the fourth end, and the second end is connected to the third end. The first end receives the output of the confluence unit, and the fourth end outputs the first end to the indoor unit, and the second end receives the first end. The output of the heat exchange unit is output from the third end to the bus unit;

汇流单元，用于将切换单元输出的制冷剂经气液分离以及压缩后，输出至切换单元； a collecting unit, configured to output the refrigerant outputted by the switching unit by gas-liquid separation and compression, and output to the switching unit;

第一换热单元，用于驱动室外空气流经第一换热单元中的第一换热器，一端与切换单元的第二端相连，另一端与室内机的第二端相连； a first heat exchange unit, configured to drive the outdoor air to flow through the first heat exchanger in the first heat exchange unit, one end is connected to the second end of the switching unit, and the other end is connected to the second end of the indoor unit;

第二电子膨胀阔的一端与第二截止阔的另一端相连，另一端与第二换热器的一端相连； One end of the second electronic expansion is connected to the other end of the second cut-off width, and the other end is connected to one end of the second heat exchanger;

第二换热器的另一端与第三电子膨胀阔的一端相连； The other end of the second heat exchanger is connected to one end of the third electronic expansion;

第三电子膨胀阔的另一端与第三换热器的一端相连； The other end of the third electronic expansion is connected to one end of the third heat exchanger;

第三换热器的另一端与第一截止阔的另一端相连； The other end of the third heat exchanger is connected to the other end of the first cut-off width;

室内侧风扇用于驱动室内回风流经第二换热器和第三换热器。 The indoor side fan is used to drive the indoor return air to flow through the second heat exchanger and the third heat exchanger.

较佳地，所述切换单元包括：四通换向阔以及第一截止阔，其中，四通换向阔的第一端与汇流单元的输出端相连，第二端与第一换热单元的输入端相连，第三端与汇流单元的输入端相连，第四端与第一截止阔的一端相连，第一截止阔的另一端与室内机的第一端相连。 Preferably, the switching unit comprises: a four-way commutation width and a first cut-off width, wherein the first end of the four-way commutation is connected to the output end of the confluence unit, and the second end is connected to the first heat exchange unit The input end is connected, the third end is connected to the input end of the bus unit, the fourth end is connected to the first cut-off end, and the other end of the first cut-off width is connected to the first end of the indoor unit.

较佳地，所述汇流单元包括：压缩机、单向阔以及气液分离器，其中，压缩机的输出端与单向阔的输入端相连，单向阔的输出端与四通换向阔的第一端相连，气液分离器的输入端与四通换向阔的第三端相连，气液分离器的输出端与压缩机的输入端相连。 Preferably, the confluence unit comprises: a compressor, a unidirectional wide and a gas-liquid separator, wherein the output end of the compressor is connected to the unidirectional wide input end, the one-way wide output end and the four-way reversing width The first end is connected, the input end of the gas-liquid separator is connected to the third end of the four-way reversing, and the output of the gas-liquid separator is connected to the input end of the compressor.

较佳地，所述第一换热单元包括：第一换热器、室外侧风扇、第一电子膨胀阔以及第二截止阔，其中， Preferably, the first heat exchange unit includes: a first heat exchanger, an outdoor side fan, a first electronic expansion width, and a second cut-off width, wherein

第一换热器的一端与四通换向阔的第二端相连，另一端与第一电子膨月长阔的一端相连； One end of the first heat exchanger is connected to the second end of the four-way reversing width, and the other end is connected to one end of the first electronic expansive moon;

第一电子膨胀阔的另一端与第二截止阔的一端相连； The other end of the first electronic expansion is connected to the end of the second cut-off width;

第二截止阔的另一端与室内机的第二端相连； The other end of the second cut-off width is connected to the second end of the indoor unit;

室外侧风扇用于驱动室外空气流经第一换热器。 The outdoor side fan is used to drive outdoor air through the first heat exchanger.

较佳地，所述压缩机由一台或多台定速压缩机构成，或由变速压缩机构成，或由定速压缩机与变速压缩机组合构成。 Preferably, the compressor is composed of one or more fixed speed compressors, or a variable speed compressor, or a combination of a fixed speed compressor and a variable speed compressor.

较佳地， Preferably,

所述室外侧风扇为轴流风扇； The outdoor side fan is an axial flow fan;

所述室内侧风扇为离心风扇或灌流风扇。 The indoor side fan is a centrifugal fan or a perfusion fan.

较佳地，所述第一换热器、第二换热器和第三换热器为铝箔翅片铜管换热器或铝制翅片式微通道换热器。 Preferably, the first heat exchanger, the second heat exchanger and the third heat exchanger are aluminum foil finned copper tubes Heat exchanger or aluminum finned microchannel heat exchanger.

较佳地，所述第二换热器处于第三换热器的上部。 Preferably, the second heat exchanger is in an upper portion of the third heat exchanger.

较佳地，所述室内机进一步包括：第一温度传感器、第二温度传感器以及第三温度传感器，其中， Preferably, the indoor unit further includes: a first temperature sensor, a second temperature sensor, and a third temperature sensor, wherein

第一温度传感器布置于第二电子膨胀阔与第二换热器之间且靠近第二换热器一端的制冷剂管路上； The first temperature sensor is disposed on the refrigerant line between the second electronic expansion and the second heat exchanger and adjacent to one end of the second heat exchanger;

第二温度传感器布置于第三换热器与第一截止阔之间且靠近第三换热器一端的制冷剂管路上； a second temperature sensor is disposed between the third heat exchanger and the first cut-off width and adjacent to the refrigerant line at one end of the third heat exchanger;

第三温度传感器布置于第三电子膨胀阔与第三换热器之间且靠近第三换热器一端的制冷剂管路上。 The third temperature sensor is disposed between the third electronic expansion zone and the third heat exchanger and adjacent to the refrigerant line at one end of the third heat exchanger.

较佳地，制冷剂由压缩机排气口排出进入单向阔，由单向阔输出的高压制冷剂气体进入四通换向阔的第一端； Preferably, the refrigerant is discharged from the exhaust port of the compressor into a one-way wide, and the high-pressure refrigerant gas of the one-way wide output enters the first end of the four-way reversing width;

当多联机热泵空调***处于制冷和不降温除湿工况时： When the multi-line heat pump air conditioning system is in the cooling and non-cooling dehumidification conditions:

四通换向阔的第一端与第二端连通，第三端与第四端连通，制冷剂依次流经四通换向阔的第二端、第一换热器、第一电子膨胀阔、第二截止阔、第二电子膨胀阔、第二换热器、第三电子膨胀阔、第三换热器、第一截止阔、四通换向阔的第四端，再从四通换向阔的第三端流经气液分离器进入压缩机的吸气口； The first end of the four-way reversing width is in communication with the second end, and the third end is in communication with the fourth end, and the refrigerant sequentially flows through the four-way reversing second end, the first heat exchanger, and the first electronic expansion , the second cut-off width, the second electronic expansion wide, the second heat exchanger, the third electronic expansion wide, the third heat exchanger, the first cut-off wide, the fourth end of the four-way commutation, and then from the four-way Flowing through the gas-liquid separator to the suction port of the compressor to the wide third end;

当多联机热泵空调***处于制热工况时： When the multi-line heat pump air conditioning system is in heating conditions:

四通换向阔的第一端与第四端连通，第二端与第三端连通，制冷剂依次流经四通换向阔的第四端、第一截止阔、第三换热器、第三电子膨胀阔、第二换热器、第二电子膨胀阔、第二截止阔、第一电子膨胀阔、第一换热器、四通换向阔的第二端，再从四通换向阔的第三端流经气液分离器进入压缩机的吸气口。 The first end of the four-way reversing width is in communication with the fourth end, and the second end is in communication with the third end, and the refrigerant sequentially flows through the four-way reversing wide fourth end, the first cut-off wide, the third heat exchanger, The third electronic expansion is wide, the second heat exchanger, the second electronic expansion is wide, the second cut-off is wide, the first electronic expansion is wide, the first heat exchanger, the second end of the four-way commutation is wide, and then the four-way is changed. The wide third end flows through the gas-liquid separator into the suction port of the compressor.

较佳地， Preferably,

在制冷工况下，第一电子膨胀阔与第三电子膨胀阔全开，第二电子膨胀阔节流，第一换热器为冷凝器，第二换热器与第三换热器均为蒸发器，室内机送出的低温风为室内制冷，第二电子膨胀阔的阔开度通过第二温度传感器与第一温度传感器采集温度的差值控制； In the cooling condition, the first electronic expansion is wide and the third electronic expansion is wide open, the second electronic expansion is wide throttle, the first heat exchanger is a condenser, and the second heat exchanger and the third heat exchanger are both The evaporator, the low temperature wind sent by the indoor unit is indoor refrigeration, and the wide opening degree of the second electronic expansion is controlled by the difference between the temperature collected by the second temperature sensor and the first temperature sensor;

在不降温除湿工况下，第一电子膨胀阔与第二电子膨胀阔全开，第三电子膨胀阔节流，第一换热器与第二换热器均为冷凝器，第三换热器为蒸发器，流经室内机的回风一部分被第二换热器加热为热风，另一部分被第三换热器除湿冷却，经处理的冷风与热风混合后送入室内；第三电子膨胀阔的阔开度通过第二温度传感器与第三温度传感器采集温度的差值控制；在制热工况下，第三电子膨胀阔全开，第一电子膨胀阔与第二电子膨胀阔节流，第一换热器为蒸发器，第二换热器与第三换热器均为冷凝器，室内机送出的高温风为室内制热；第二电子膨胀阔的阔开度通过高压制冷剂的冷凝温度与第一温度传感器采集温度的差值控制。 In the case of no cooling and dehumidification, the first electronic expansion is wide and the second electronic expansion is wide open, the third electronic expansion is wide, the first heat exchanger and the second heat exchanger are both condensers, and the third heat exchange The evaporator is an evaporator, and part of the return air flowing through the indoor unit is heated by the second heat exchanger into hot air, and the other part is The three heat exchangers are dehumidified and cooled, and the treated cold air is mixed with the hot air and sent into the room; the wide opening degree of the third electronic expansion is controlled by the difference between the temperature collected by the second temperature sensor and the third temperature sensor; The third electronic expansion is wide open, the first electronic expansion is wide and the second electronic expansion is wide, the first heat exchanger is an evaporator, and the second heat exchanger and the third heat exchanger are both condensers, indoor The high temperature wind sent by the machine is indoor heating; the wide opening degree of the second electronic expansion is controlled by the difference between the condensation temperature of the high pressure refrigerant and the temperature collected by the first temperature sensor.

较佳地，所述室内机进一步包括：第四换热器以及第五换热器，其中，由第二换热器与第三换热器构成一组换热器，由第四换热器与第五换热器构成另一组换热器，两组换热器由钣金件连接，形成 V字型换热器。 Preferably, the indoor unit further includes: a fourth heat exchanger and a fifth heat exchanger, wherein the second heat exchanger and the third heat exchanger form a group of heat exchangers, and the fourth heat exchanger Another heat exchanger is formed with the fifth heat exchanger, and the two heat exchangers are connected by a sheet metal member to form a V-shaped heat exchanger.

较佳地，所述第二换热器的另一端与第四换热器的一端相连；第四换热器的另一端与第三电子膨胀阔的一端相连； Preferably, the other end of the second heat exchanger is connected to one end of the fourth heat exchanger; the other end of the fourth heat exchanger is connected to one end of the third electronic expansion;

第三换热器的另一端与第五换热器的一端相连； The other end of the third heat exchanger is connected to one end of the fifth heat exchanger;

第五换热器的另一端与第一截止阔的另一端相连，第二温度传感器布置于第五换热器与第一截止阔之间且靠近第五换热器一端的制冷剂管路上。 The other end of the fifth heat exchanger is connected to the other end of the first cut-off width, and the second temperature sensor is disposed between the fifth heat exchanger and the first cut-off width and adjacent to the refrigerant line at one end of the fifth heat exchanger.

较佳地，在不降温除湿工况下，制冷剂依次流过第二电子膨胀阔、第二换热器、第四换热器、第三电子膨胀阔、第三换热器与第五换热器，第二电子膨胀阔全开且第三电子膨胀阔节流，第二换热器与第四换热器均为冷凝器，第三换热器与第五换热器均为蒸发器，从第二换热器流出的为热风，第三换热器流出的为冷风，从第四换热器流出的为热风，从第五换热器流出的为冷风，所述热风与冷风混合形成送风。 Preferably, in the case of no cooling and dehumidification, the refrigerant sequentially flows through the second electronic expansion, the second heat exchanger, the fourth heat exchanger, the third electronic expansion, the third heat exchanger and the fifth exchange The second electronic heat expansion is wide open and the third electronic expansion is wide throttle, the second heat exchanger and the fourth heat exchanger are both condensers, and the third heat exchanger and the fifth heat exchanger are both evaporators The hot air flows out from the second heat exchanger, the cold air flows out from the third heat exchanger, the hot air flows out from the fourth heat exchanger, and the cold air flows out from the fifth heat exchanger. The hot air is mixed with the cold air. Form the air supply.

较佳地，所述第三电子膨胀阔为并联的热力膨胀阔与电磁阔，热力膨胀阔的感温包布置于第一截止阔与第三换热器之间且靠近第三换热器一端的制冷剂管路上，其中， Preferably, the third electronic expansion is a parallel thermal expansion and electromagnetic wide, and the thermal expansion package is disposed between the first cut-off width and the third heat exchanger and adjacent to the third heat exchanger end. Refrigerant line, where

电磁阔打开时对应第三电子膨胀阔全开；电磁阔关闭且热力膨胀阔调节时对应第三电子膨胀阔节流调节，热力膨胀阔的阔开度由感温包测得的温度进行控制。 When the electromagnetic wide opening is opened, the third electronic expansion is wide open; the electromagnetic wide opening is closed and the thermal expansion is wide adjustment corresponding to the third electronic expansion wide throttle regulation, and the wide expansion degree of the thermal expansion is controlled by the temperature measured by the temperature sensing package.

一种控制多联机热泵空调***的方法，该方法包括： A method of controlling a multi-line heat pump air conditioning system, the method comprising:

A, 室外机的汇流单元接收切换单元的第三端输出的制冷剂，进行气液分离以及压缩后，输出至切换单元的第一端； A, the sink unit of the outdoor unit receives the refrigerant outputted from the third end of the switching unit, performs gas-liquid separation and compression, and outputs to the first end of the switching unit;

判断多联机热泵空调***所处的工况： B , 如果处于制冷和不降温除湿工况，驱动切换单元与第一端相连的第二端输出的制冷剂依次流经第一换热单元以及室内机的第二电子膨胀阔、第二换热器、第三电子膨胀阔、第三换热器，经切换单元中的第一截止阔流回至切换单元的第四端，再从切换单元的第三端输出； Judging the working conditions of the multi-line heat pump air conditioning system: B. If it is in a cooling and non-cooling dehumidification condition, the refrigerant outputted by the second end connected to the first end of the driving switching unit sequentially flows through the first heat exchange unit and the second electronic expansion of the indoor unit, and the second heat exchange , the third electronic expansion wide, and the third heat exchanger, return to the fourth end of the switching unit via the first cutoff in the switching unit, and then output from the third end of the switching unit;

C, 如果处于制热工况，驱动切换单元与第一端相连的第四端输出的制冷剂依次流经室内机的第三换热器、第三电子膨胀阔、第二换热器、第二电子膨胀阔，经室外机的第二截止阔以及第一换热单元流回至切换单元的第二端，再从切换单元的第三端输出。 C, if in the heating condition, the refrigerant outputted by the fourth end connected to the first end of the driving switching unit sequentially flows through the third heat exchanger of the indoor unit, the third electronic expansion wide, the second heat exchanger, and the second The second electronic expansion is wide, the second cut-off width of the outdoor unit and the first heat exchange unit flow back to the second end of the switching unit, and then output from the third end of the switching unit.

其中， among them,

所述切换单元包括：四通换向阔以及第一截止阔，其中， The switching unit includes: a four-way reversing width and a first cut-off width, wherein

四通换向阔的第一端与汇流单元的输出端相连，第二端与第一换热单元的输入端相连，第三端与汇流单元的输入端相连，第四端与第一截止阔的一端相连，第一截止阔的另一端与室内机的第一端相连； The first end of the four-way reversing width is connected to the output end of the confluence unit, the second end is connected to the input end of the first heat exchange unit, the third end is connected to the input end of the confluence unit, and the fourth end is connected to the first end One end of the first cut-off is connected to the first end of the indoor unit;

所述汇流单元包括：压缩机、单向阔以及气液分离器，其中，压缩机的输出端与单向阔的输入端相连，单向阔的输出端与四通换向阔的第一端相连，气液分离器的输入端与四通换向阔的第三端相连，气液分离器的输出端与压缩机的输入端相连； The confluence unit comprises: a compressor, a unidirectional wide and a gas-liquid separator, wherein the output end of the compressor is connected to the unidirectional wide input end, the unidirectional wide output end and the first end of the four-way reversing width Connected, the input end of the gas-liquid separator is connected to the third end of the four-way reversing, and the output end of the gas-liquid separator is connected to the input end of the compressor;

所述第一换热单元包括：第一换热器、室外侧风扇、第一电子膨胀阔以及第二截止阔，其中， The first heat exchange unit includes: a first heat exchanger, an outdoor side fan, a first electronic expansion width, and a second cut-off width, wherein

室外侧风扇用于驱动室外空气流经第一换热器； The outdoor side fan is used to drive the outdoor air to flow through the first heat exchanger;

所述室内机还包括：用于驱动室内回风流经第二换热器和第三换热器的室内侧风扇。 The indoor unit further includes: an indoor side fan for driving the indoor return air to flow through the second heat exchanger and the third heat exchanger.

其中，所述步骤 B包括： The step B includes:

四通换向阔的第一端与第二端连通，第三端与第四端连通，制冷剂依次流经四通换向阔的第二端、第一换热器、第一电子膨胀阔、第二截止阔、第二电子膨胀阔、第二换热器、第三电子膨胀阔、第三换热器、第一截止阔、四通换向阔的第四端，再从四通换向阔的第三端流经气液分离器进入压缩机的吸气口；其中，在制冷工况下，第一电子膨胀阔与第三电子膨胀阔全开，第二电子膨胀阔节流，第一换热器为冷凝器，第二换热器与第三换热器均为蒸发器，室内机送出的低温风为室内制冷，第二电子膨胀阔的阔开度通过第二温度传感器与第一温度传感器采集温度的差值控制； The first end of the four-way reversing width is in communication with the second end, and the third end is in communication with the fourth end, and the refrigerant sequentially flows through the four-way reversing second end, the first heat exchanger, and the first electronic expansion , the second cut-off width, the second electronic expansion wide, the second heat exchanger, the third electronic expansion wide, the third heat exchanger, the first cut-off wide, the fourth end of the four-way commutation, and then from the four-way Flowing through the gas-liquid separator to the suction port of the compressor to the wide third end; Wherein, in the cooling condition, the first electron expansion is wide and the third electron expansion is wide open, the second electronic expansion is wide throttle, the first heat exchanger is a condenser, and the second heat exchanger and the third heat exchanger All are evaporators, the low temperature wind sent by the indoor unit is indoor refrigeration, and the wide opening degree of the second electronic expansion is controlled by the difference between the temperature collected by the second temperature sensor and the first temperature sensor;

在不降温除湿工况下，第一电子膨胀阔与第二电子膨胀阔全开，第三电子膨胀阔节流，第一换热器与第二换热器均为冷凝器，第三换热器为蒸发器，流经室内机的回风一部分被第二换热器加热为热风，另一部分被第三换热器除湿冷却，经处理的冷风与热风混合后送入室内；第三电子膨胀阔的阔开度通过第二温度传感器与第三温度传感器采集温度的差值控制。 In the case of no cooling and dehumidification, the first electronic expansion is wide and the second electronic expansion is wide open, the third electronic expansion is wide, the first heat exchanger and the second heat exchanger are both condensers, and the third heat exchange The evaporator is an evaporator, a part of the return air flowing through the indoor unit is heated by the second heat exchanger to be hot air, and the other part is dehumidified and cooled by the third heat exchanger, and the treated cold air is mixed with the hot air and sent into the room; the third electronic expansion The wide openness is controlled by the difference between the temperature collected by the second temperature sensor and the third temperature sensor.

其中，所述步骤 C包括： The step C includes:

四通换向阔的第一端与第四端连通，第二端与第三端连通，制冷剂依次流经四通换向阔的第四端、第一截止阔、第三换热器、第三电子膨胀阔、第二换热器、第二电子膨胀阔、第二截止阔、第一电子膨胀阔、第一换热器、四通换向阔的第二端，再从四通换向阔的第三端流经气液分离器，进入压缩机的吸气口； The first end of the four-way reversing width is in communication with the fourth end, and the second end is in communication with the third end, and the refrigerant sequentially flows through the four-way reversing wide fourth end, the first cut-off wide, the third heat exchanger, The third electronic expansion is wide, the second heat exchanger, the second electronic expansion is wide, the second cut-off is wide, the first electronic expansion is wide, the first heat exchanger, the second end of the four-way commutation is wide, and then the four-way is changed. Flowing through the gas-liquid separator to the wide third end and entering the suction port of the compressor;

其中，第三电子膨胀阔全开，第一电子膨胀阔与第二电子膨胀阔节流，第一换热器为蒸发器，第二换热器与第三换热器均为冷凝器，室内机送出的高温风为室内制热；第二电子膨胀阔的阔开度通过高压制冷剂的冷凝温度与第一温度传感器采集温度的差值控制。 Wherein, the third electronic expansion is wide open, the first electronic expansion is wide and the second electronic expansion is wide, the first heat exchanger is an evaporator, and the second heat exchanger and the third heat exchanger are both condensers, indoor The high temperature wind sent by the machine is indoor heating; the wide opening degree of the second electronic expansion is controlled by the difference between the condensation temperature of the high pressure refrigerant and the temperature collected by the first temperature sensor.

由上述技术方案可见，本发明实施例提供的一种多联机热泵空调*** 及控制多联机热泵空调***的方法，室外机的汇流单元接收切换单元的第三端输出的制冷剂，进行气液分离以及压缩后，输出至切换单元的第一端；判断多联机热泵空调***所处的工况：如果处于制冷和不降温除湿工况，驱动切换单元与第一端相连的第二端输出的制冷剂依次流经第一换热单元以及室内机的第二电子膨胀阔、第二换热器、第三电子膨胀阔、第三换热器，经切换单元中的第一截止阔流回至切换单元的第四端，再从切换单元的第三端输出；如果处于制热工况，驱动切换单元与第一端相连的第四端输出的制冷剂依次流经室内机的第三换热器、第三电子膨胀阔、第二换热器、第二电子膨胀阔，经室外机的第二截止阔以及第一换热单元流回至切换单元的第二端，再从切换单元的第三端输出。这样，室内机和室外机均采用电子膨胀阔，无需开发专用除湿电磁阔或增加电磁阔，从而降低了系统成本，保证了***控制精度，并降低了***控制难度。附图说明 It can be seen from the above technical solution that the multi-line heat pump air conditioning system and the method for controlling the multi-line heat pump air conditioning system are provided by the embodiment of the present invention, and the sink unit of the outdoor unit receives the refrigerant outputted from the third end of the switching unit to perform gas-liquid separation. And after being compressed, outputting to the first end of the switching unit; determining the working condition of the multi-connected heat pump air conditioning system: if in the cooling and non-cooling dehumidification conditions, the cooling of the second end output of the driving switching unit connected to the first end The agent sequentially flows through the first heat exchange unit and the second electronic expansion wide, the second heat exchanger, the third electronic expansion wide, and the third heat exchanger of the indoor unit, and switches back to the switchover through the first cut-off flow in the switching unit The fourth end of the unit is outputted from the third end of the switching unit; if in the heating condition, the refrigerant outputted by the fourth end connected to the first end of the driving switching unit sequentially flows through the third heat exchanger of the indoor unit a third electronic expansion, a second heat exchanger, a second electronic expansion, a second cut-off width of the outdoor unit, and a first heat exchange unit flowing back to the second end of the switching unit, Then output from the third end of the switching unit. In this way, both the indoor unit and the outdoor unit are expanded in electronic expansion, eliminating the need to develop a dedicated dehumidification electromagnetic wide or increasing the electromagnetic width, thereby reducing system cost, ensuring system control accuracy, and reducing system control difficulty. DRAWINGS

为了更清楚地说明本发明实施例或现有技术中的技术方案，以下将对实施例或现有技术描述中所需要使用的附图作筒单地介绍。显而易见地，以下描述中的附图仅仅是本发明的一些实施例，对于本领域普通技术人员而言，还可以根据这些附图所示实施例得到其它的实施例及其附图。 In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings to be used in the embodiments or the description of the prior art will be briefly described below. It is apparent that the drawings in the following description are only some embodiments of the present invention, and other embodiments and drawings thereof may be obtained by those skilled in the art from the embodiments shown in the drawings.

图 1为现有多联机热泵空调***结构示意图。 Figure 1 is a schematic view showing the structure of a conventional multi-connected heat pump air conditioning system.

图 2为本发明实施例多联机热泵空调***结构示意图。 2 is a schematic structural view of a multi-line heat pump air conditioning system according to an embodiment of the present invention.

图 3为本发明实施例实现室内不降温除湿的室内机工作示意图。 FIG. 3 is a schematic view showing the operation of an indoor unit that does not cool down and dehumidify indoors according to an embodiment of the present invention.

图 4为本发明实施例室内机的另一结构示意图。 FIG. 4 is another schematic structural diagram of an indoor unit according to an embodiment of the present invention.

图 5为本发明实施例室内机的再一结构示意图。 FIG. 5 is a schematic structural diagram of still another embodiment of an indoor unit according to an embodiment of the present invention.

图 6为本发明实施例控制多联机热泵空调***的方法流程示意图。具体实施方式 6 is a schematic flow chart of a method for controlling a multi-line heat pump air conditioning system according to an embodiment of the present invention. detailed description

以下将结合附图对本发明各实施例的技术方案进行清楚、完整的描述，显然，所描述的实施例仅仅是本发明的一部分实施例，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的前提下所得到的所有其它实施例，都属于本发明所保护的范围。 The technical solutions of the embodiments of the present invention will be clearly and completely described in the following with reference to the accompanying drawings. It is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments obtained by a person of ordinary skill in the art based on the embodiments of the present invention without departing from the inventive scope are the scope of the present invention.

现有的多联机热泵空调***，通过增加再热换热器，利用从室外侧换热器流过来的高温高压的制冷剂流经该再热换热器，从而将热量排入回风中，另一部分回风经蒸发器降温除湿后与该部分被加热的回风混合后送入室内，从而实现不降温除湿的功能，使得***成本增加；或者，通过开发专用除湿电磁阔或增加多个电磁阔以实现不降温除湿的功能，不仅增加了成本，也使得多联机热泵空调***的控制难度增加且控制精度难以得到保证。 The existing multi-line heat pump air conditioning system, by adding a reheat heat exchanger, uses the high temperature and high pressure refrigerant flowing from the outdoor side heat exchanger to flow through the reheat heat exchanger, thereby discharging heat into the return air. The other part of the return air is cooled and dehumidified by the evaporator, and then mixed with the heated return air to be sent into the room, thereby realizing the function of not cooling and dehumidifying, thereby increasing the system cost; or, by developing a dedicated dehumidification electromagnetic wide or adding multiple electromagnetics Widely to achieve the function of not cooling and dehumidifying, not only increases the cost, but also makes the control difficulty of the multi-line heat pump air conditioning system increase and the control precision is difficult to be guaranteed.

本发明实施例中，从经济角度及控制角度出发，设计高性能的用于多联机热泵空调***的新型室内机，提出具备不降温除湿功能的多联机热泵空调***，保证多联机热泵空调***高效运行的同时，实现制冷、制热及不降温除湿的目的，满足用户高标准的需求。 In the embodiment of the invention, a high-performance new indoor unit for a multi-line heat pump air conditioning system is designed from the perspective of economy and control, and a multi-line heat pump air conditioning system with no cooling and dehumidifying function is proposed to ensure efficient multi-line heat pump air conditioning system. At the same time of operation, the purpose of cooling, heating and non-cooling and dehumidification is achieved to meet the high standards of users.

本发明实施例的多联机热泵空调***，可以满足夏季室内制冷、冬季制热和梅雨季节的不降温除湿功能。从经济性的角度出发，本发明实施例涉及的室内机无需额外增加换热器；从提高控制精度和降低控制难度角度出发，本发明实施例涉及的室内机和室外机均采用电子膨胀阔，因此无需开发专用除湿电磁阔或增加电磁阔。图 2为本发明实施例多联机热泵空调***结构示意图。参见图 2, 该多联机热泵空调***包括：室外机 01 以及室内机 02, 其中，室外机 01为一台或多台，室内机 02为一台或多台，室内机，也可以是现有技术采用的室内机，即仅具备制冷和制热功能的室内机。 The multi-line heat pump air conditioning system of the embodiment of the invention can satisfy the function of not cooling and dehumidifying in the indoor indoor cooling, winter heating and plum rain seasons. The indoor unit and the outdoor unit according to the embodiments of the present invention are both electronically expanded, and the indoor unit and the outdoor unit according to the embodiments of the present invention are used for the purpose of improving the control accuracy and reducing the control difficulty. Therefore, it is not necessary to develop a dedicated dehumidification electromagnetic wide or increase the electromagnetic width. 2 is a schematic structural view of a multi-connected heat pump air conditioning system according to an embodiment of the present invention. Referring to FIG. 2, the multi-connected heat pump air conditioning system includes: an outdoor unit 01 and an indoor unit 02, wherein the outdoor unit 01 is one or more units, and the indoor unit 02 is one or more units, and the indoor unit may be existing. The indoor unit used in technology is an indoor unit that only has cooling and heating functions.

室外机 01包括：控制单元、汇流单元、切换单元以及第一换热单元，其中， The outdoor unit 01 includes: a control unit, a sink unit, a switching unit, and a first heat exchange unit, wherein

控制单元，用于在多联机热泵空调***处于制冷工况时，控制第一换热单元中的第一换热器 4为冷凝器，室内机 02中的第二换热器 13与第三换热器 14均为蒸发器；在多联机热泵空调***处于制热工况时，控制第一换热单元中的第一换热器 4为蒸发器，室内机 02中的第二换热器 13与第三换热器 14均为冷凝器；在多联机热泵空调***处于不降温除湿工况时，控制第一换热单元中的第一换热器 4与室内机 02中的第二换热器 13均为冷凝器，室内机 02中的第三换热器 14为蒸发器； a control unit, configured to control the first heat exchanger 4 in the first heat exchange unit as a condenser, and the second heat exchanger 13 in the indoor unit 02 as a third change when the multi-line heat pump air conditioning system is in a cooling condition The heat exchangers 14 are all evaporators; when the multi-line heat pump air conditioning system is in a heating condition, the first heat exchanger 4 in the first heat exchange unit is controlled to be an evaporator, and the second heat exchanger 13 in the indoor unit 02 is controlled. And the third heat exchanger 14 is a condenser; when the multi-line heat pump air conditioning system is in a temperature-free dehumidification condition, controlling the second heat exchange in the first heat exchanger 4 and the indoor unit 02 in the first heat exchange unit The 13 is a condenser, and the third heat exchanger 14 in the indoor unit 02 is an evaporator;

切换单元，用于当多联机热泵空调***处于制冷以及不降温除湿工况时，控制切换单元的第一端与第二端连通，第三端与第四端连通，第一端接收汇流单元的输出，由第二端输出至第一换热单元，第四端接收室内机的输出，由第三端输出至汇流单元；当多联机热泵空调***处于制热工况时，控制切换单元的第一端与第四端连通，第二端与第三端连通，第一端接收汇流单元的输出，由第四端输出至室内机的第一端，第二端接收第一换热单元的输出，由第三端输出至汇流单元； a switching unit, configured to: when the multi-connected heat pump air conditioning system is in a cooling state and not in a dehumidifying condition, the first end of the control switching unit is in communication with the second end, the third end is in communication with the fourth end, and the first end receives the confluence unit The output is output from the second end to the first heat exchange unit, the fourth end receives the output of the indoor unit, and is output from the third end to the sink unit; when the multi-connected heat pump air conditioning system is in the heating condition, the control switch unit is One end is connected to the fourth end, and the second end is connected to the third end. The first end receives the output of the confluence unit, and the fourth end outputs the output to the first end of the indoor unit, and the second end receives the output of the first heat exchange unit. , output from the third end to the bus unit;

第一换热单元，用于驱动室外空气流经第一换热单元中的第一换热器 4, 一端与切换单元的第二端相连，另一端与室内机的第二端相连。 The first heat exchange unit is configured to drive the outdoor air to flow through the first heat exchanger 4 in the first heat exchange unit, one end is connected to the second end of the switching unit, and the other end is connected to the second end of the indoor unit.

其中， among them,

切换单元包括：四通换向阔 3以及第一截止阔 8 , 其中， The switching unit includes: a four-way reversing width 3 and a first cut-off width 8 , wherein

四通换向阔 3 的第一端与汇流单元的输出端相连，第二端与第一换热单元的输入端相连，第三端与汇流单元的输入端相连，第四端与第一截止阔 8的一端相连，第一截止阔 8的另一端与室内机的第一端相连。 The first end of the four-way reversing width 3 is connected to the output end of the confluence unit, the second end is connected to the input end of the first heat exchange unit, the third end is connected to the input end of the confluence unit, and the fourth end is connected to the first end. One end of the wide 8 is connected, and the other end of the first cut wide 8 is connected to the first end of the indoor unit.

汇流单元包括：压缩机 1、单向阔 2以及气液分离器 7 , 其中，压缩机 1 的输出端与单向阔 2的输入端相连，单向阔的输出端与四通换向阔 3的第一端相连，气液分离器 7的输入端与四通换向阔 3的第三端相连，气液分离器 7的输出端与压缩机 1的输入端相连。 The flow unit includes: a compressor 1, a unidirectional wide 2, and a gas-liquid separator 7, wherein The output end of the compressor 1 is connected to the input end of the unidirectional wide 2, and the output end of the unidirectional wide is connected to the first end of the four-way reversing wide 3, and the input end of the gas-liquid separator 7 and the four-way reversing width 3 The third end is connected, and the output of the gas-liquid separator 7 is connected to the input of the compressor 1.

本发明实施例中，压缩机 1 可由一台或多台定速压缩机构成，也可以由变速压缩机构成，还可以由定速压缩机与变速压缩机组合构成。 In the embodiment of the present invention, the compressor 1 may be composed of one or more fixed speed compressors, a variable speed compressor, or a combination of a fixed speed compressor and a variable speed compressor.

第一换热单元包括：第一换热器 4、室外侧风扇 5、第一电子膨胀阔 6 以及第二截止阔 9, 其中， The first heat exchange unit includes: a first heat exchanger 4, an outdoor side fan 5, a first electronic expansion width 6 and a second cut-off width 9, wherein

第一换热器 4的一端与四通换向阔 3的第二端相连，另一端与第一电子膨胀阔 6的一端相连； One end of the first heat exchanger 4 is connected to the second end of the four-way reversing width 3, and the other end is connected to one end of the first electron expansion width 6;

第一电子膨胀阔 6的另一端与第二截止阔 9的一端相连； The other end of the first electronic expansion width 6 is connected to one end of the second cut-off width 9;

第二截止阔 9的另一端与室内机的第二端相连； The other end of the second cut-off width 9 is connected to the second end of the indoor unit;

室外侧风扇 5用于驱动室外空气流经第一换热器 4。 The outdoor side fan 5 is for driving outdoor air to flow through the first heat exchanger 4.

本发明实施例中，室外侧风扇 5为轴流风扇，通过室外侧风扇 5的旋转，驱动室外空气流经第一换热器 4。 In the embodiment of the present invention, the outdoor side fan 5 is an axial flow fan, and the outdoor air is driven to flow through the first heat exchanger 4 by the rotation of the outdoor side fan 5.

这样，室外机 01包括：压缩机 1、单向阔 2、四通换向阔 3、第一换热器 4、室外侧风扇 5、第一电子膨胀阔 6、气液分离器 7、第一截止阔 8以及第二截止阔 9, 其中， Thus, the outdoor unit 01 includes: a compressor 1, a unidirectional wide 2, a four-way reversing width 3, a first heat exchanger 4, an outdoor side fan 5, a first electronic expansion width 6, a gas-liquid separator 7, and a first The cut-off width of 8 and the second cut-off width of 9, among them,

压缩机 1的输出端与单向阔 2的一端相连，输入端与气液分离器 7的输出端相连； The output end of the compressor 1 is connected to one end of the unidirectional width 2, and the input end is connected to the output end of the gas-liquid separator 7;

单向阔 2的另一端与四通换向阔 3的第一端相连； The other end of the unidirectional width 2 is connected to the first end of the four-way reversing width 3;

四通换向阔 3的第二端与第一换热器 4的一端相连，第三端与气液分离器 7的输入端相连，第四端与第一截止阔 8的一端相连； The second end of the four-way reversing width 3 is connected to one end of the first heat exchanger 4, the third end is connected to the input end of the gas-liquid separator 7, and the fourth end is connected to one end of the first cut-off width 8;

第一换热器 4的另一端与第一电子膨胀阔 6的一端相连； The other end of the first heat exchanger 4 is connected to one end of the first electronic expansion width 6;

第一截止阔 8的另一端输出至室外机 02的第一端，第二截止阔 9的另一端输出至室外机 02的第二端。 The other end of the first cut-off width 8 is output to the first end of the outdoor unit 02, and the other end of the second cut-off width 9 is output to the second end of the outdoor unit 02.

室内机 02包括：室内侧风扇 10、第二电子膨胀阔 11、第二换热器 13、第三电子膨胀阔 17以及第三换热器 14, 其中， The indoor unit 02 includes: an indoor side fan 10, a second electronic expansion width 11, a second heat exchanger 13, a third electronic expansion width 17, and a third heat exchanger 14, wherein

第二电子膨胀阔 11的一端与第二截止阔 9的另一端相连，另一端与第二换热器 13的一端相连； One end of the second electronic expansion width 11 is connected to the other end of the second cut-off width 9, and the other end is connected to one end of the second heat exchanger 13;

第二换热器 13的另一端与第三电子膨胀阔 17的一端相连； The other end of the second heat exchanger 13 is connected to one end of the third electronic expansion flange 17;

第三电子膨胀阔 17的另一端与第三换热器 14的一端相连；第三换热器 14的另一端与第一截止阔 8的另一端相连； The other end of the third electronic expansion width 17 is connected to one end of the third heat exchanger 14; The other end of the third heat exchanger 14 is connected to the other end of the first cut-off width 8;

室内侧风扇 10用于驱动室内回风流经第二换热器 13和第三换热器 14。本发明实施例中，室内侧风扇 10可以为离心风扇或灌流风扇，通过室内侧风扇 10的旋转，驱动室内回风流经第二换热器 13和第三换热器 14。 The indoor side fan 10 is for driving the indoor return air to flow through the second heat exchanger 13 and the third heat exchanger 14. In the embodiment of the present invention, the indoor side fan 10 may be a centrifugal fan or a perfusion fan, and the indoor return air flows through the second heat exchanger 13 and the third heat exchanger 14 through the rotation of the indoor inner fan 10.

第一换热器 4、第二换热器 13和第三换热器 14可以为铝箔翅片铜管换热器或铝制翅片式微通道换热器。 The first heat exchanger 4, the second heat exchanger 13, and the third heat exchanger 14 may be aluminum foil finned copper tube heat exchangers or aluminum finned microchannel heat exchangers.

较佳地，在换热器放置（高度）的方向上，第二换热器 13处于第三换热器 14的上部。 Preferably, the second heat exchanger 13 is in the upper portion of the third heat exchanger 14 in the direction in which the heat exchanger is placed (height).

实际应用中，也可以通过换热器端面弯管的连接与焊接，使某一单独换热器分为上下两部分，例如，通过换热器端面弯管的连接与焊接，可以将室内机中的换热器分成上下两部分，即第二换热器 13和第三换热器 14, 也就是说，通过换热器端面弯管的连接与焊接，形成第二换热器 13和第三换热器 14。 In practical applications, the connection and welding of the end face bend of the heat exchanger can also be used to divide a single heat exchanger into upper and lower parts. For example, the connection and welding of the end face elbow of the heat exchanger can be used in the indoor unit. The heat exchanger is divided into upper and lower parts, that is, the second heat exchanger 13 and the third heat exchanger 14, that is, the second heat exchanger 13 and the third are formed by the connection and welding of the heat exchanger end face bends. Heat exchanger 14.

较佳地，室内机还可以进一步包括：第一温度传感器 12、第二温度传感器 15以及第三温度传感器 16, 其中， Preferably, the indoor unit may further include: a first temperature sensor 12, a second temperature sensor 15, and a third temperature sensor 16, wherein

第一温度传感器 12布置于第二电子膨胀阔 11与第二换热器 13之间且靠近第二换热器 13—端的制冷剂管路上； The first temperature sensor 12 is disposed on the refrigerant line between the second electronic expansion flange 11 and the second heat exchanger 13 and adjacent to the end of the second heat exchanger 13;

第二温度传感器 15布置于第三换热器 14与第一截止阔 8之间且靠近第三换热器 14一端的制冷剂管路上； The second temperature sensor 15 is disposed on the refrigerant line between the third heat exchanger 14 and the first cut-off width 8 and near one end of the third heat exchanger 14;

第三温度传感器 16布置于第三电子膨胀阔 17与第三换热器 14之间且靠近第三换热器 14一端的制冷剂管路上。 The third temperature sensor 16 is disposed between the third electronic expansion flange 17 and the third heat exchanger 14 and adjacent to the refrigerant line at one end of the third heat exchanger 14.

本发明实施例中，第一温度传感器 12、第二温度传感器 15以及第三温度传感器 16分别用于感知布置位置处制冷剂管路的温度，从而使得相应制冷剂管路上的电子膨胀阔根据温度传感器感知到的温度，调整该电子膨胀阔的阔开度，实现制冷、制热及不降温除湿功能。 In the embodiment of the present invention, the first temperature sensor 12, the second temperature sensor 15, and the third temperature sensor 16 are respectively used to sense the temperature of the refrigerant pipeline at the arrangement position, so that the electrons on the corresponding refrigerant pipeline expand according to the temperature. The temperature sensed by the sensor adjusts the wide opening of the electronic expansion to achieve cooling, heating and non-cooling and dehumidifying functions.

这样，室内机 02包括：室内侧风扇 10、第二电子膨胀阔 11、第一温度传感器 12、第二换热器 13、第三换热器 14、第二温度传感器 15、第三温度传感器 16以及第三电子膨胀阔 17, 其中， Thus, the indoor unit 02 includes: an indoor side fan 10, a second electronic expansion flange 11, a first temperature sensor 12, a second heat exchanger 13, a third heat exchanger 14, a second temperature sensor 15, and a third temperature sensor 16. And the third electronic expansion is wide 17, wherein

第二电子膨胀阔 11 的一端与第二换热器 13的一端相连，第一温度传感器 12布置于第二电子膨胀阔 11与第二换热器 13之间且靠近第二换热器 13—端的制冷剂管路上，第二电子膨胀阔 11的另一端与第二截止阔 9的另一端相连；第二换热器 13的另一端与第三电子膨胀阔 17的一端相连；第三电子膨胀阔 17的另一端与第三换热器 14的一端相连，第三温度传感器 16布置于第三电子膨胀阔 17与第三换热器 14之间且靠近第三换热器 14一端的制冷剂管路上； One end of the second electronic expansion 11 is connected to one end of the second heat exchanger 13, and the first temperature sensor 12 is disposed between the second electronic expansion 11 and the second heat exchanger 13 and adjacent to the second heat exchanger 13 - On the refrigerant line of the end, the other end of the second electronic expansion width 11 is connected to the other end of the second cut-off width 9; The other end of the second heat exchanger 13 is connected to one end of the third electronic expansion flange 17; the other end of the third electronic expansion width 17 is connected to one end of the third heat exchanger 14, and the third temperature sensor 16 is arranged at the third electron a gas line between the expanded width 17 and the third heat exchanger 14 and adjacent to one end of the third heat exchanger 14;

第三换热器 14的另一端与第一截止阔 8的另一端相连，第二温度传感器 15布置于第三换热器 14与第一截止阔 8之间且靠近第三换热器 14一端的制冷剂管路上； The other end of the third heat exchanger 14 is connected to the other end of the first cut-off width 8, and the second temperature sensor 15 is disposed between the third heat exchanger 14 and the first cut-off width 8 and near the end of the third heat exchanger 14. On the refrigerant line;

室内侧风扇 10用于驱动室内回风流经第二换热器 13和第三换热器 14。下面对本发明实施例多联机热泵空调***的工作流程进行详细说明。制冷剂由压缩机 1 排气口（输出端）排出进入单向阔 2, 由单向阔 2 输出的高压制冷剂气体进入四通换向阔 3的第一端； The indoor side fan 10 is for driving the indoor return air to flow through the second heat exchanger 13 and the third heat exchanger 14. The working flow of the multi-connected heat pump air conditioning system of the embodiment of the present invention will be described in detail below. The refrigerant is discharged from the exhaust port (output end) of the compressor 1 into the unidirectional width 2, and the high-pressure refrigerant gas output from the unidirectional wide 2 enters the first end of the four-way reversing width 3;

四通换向阔 3 的第一端与第二端连通，第三端与第四端连通，制冷剂依次流经四通换向阔 3的第二端、第一换热器 4、第一电子膨胀阔 6、第二截止阔 9、第二电子膨胀阔 11、第二换热器 13、第三电子膨胀阔 17、第三换热器 14、第一截止阔 8、四通换向阔 3的第四端，再从四通换向阔 3的第三端流经气液分离器 7进入压缩机 1的吸气口（输入端）； The first end of the four-way reversing width 3 is in communication with the second end, the third end is in communication with the fourth end, and the refrigerant sequentially flows through the fourth end of the four-way reversing wide 3, the first heat exchanger 4, the first Electronic expansion width 6, second cut-off width 9, second electronic expansion width 11, second heat exchanger 13, third electronic expansion width 17, third heat exchanger 14, first cut-off width 8, four-way commutation The fourth end of the third end, and then from the fourth end to the third end of the wide 3 flow through the gas-liquid separator 7 into the suction port (input) of the compressor 1;

四通换向阔 3 的第一端与第四端连通，第二端与第三端连通，制冷剂依次流经四通换向阔 3的第四端、第一截止阔 8、第三换热器 14、第三电子膨胀阔 17、第二换热器 13、第二电子膨胀阔 11、第二截止阔 9、第一电子膨胀阔 6、第一换热器 4、四通换向阔 3的第二端，再从四通换向阔 3的第三端流经气液分离器 7进入压缩机 1的吸气口。 The first end of the four-way reversing width 3 is connected with the fourth end, and the second end is connected with the third end, and the refrigerant flows through the fourth end of the four-way reversing wide 3, the first cut-off width 8, and the third change Heater 14, third electronic expansion width 17, second heat exchanger 13, second electronic expansion width 11, second cut-off width 9, first electronic expansion width 6, first heat exchanger 4, four-way commutation The second end of the third end is further changed from the fourth end to the third end of the wide 3 to flow through the gas-liquid separator 7 to enter the suction port of the compressor 1.

为实现多联机热泵空调***的制冷、制热及不降温除湿功能，不同工况下各电子膨胀阔的调节控制方法与各换热器的工作流程如下： In order to realize the cooling, heating and non-cooling dehumidification functions of the multi-connected heat pump air conditioning system, the adjustment control method of each electronic expansion and the working process of each heat exchanger under different working conditions are as follows:

制冷工况下，第一电子膨胀阔 6与第三电子膨胀阔 17全开，第二电子膨胀阔 11节流，调节流经的制冷剂流量，在该制冷工况下，第一换热器 4 为冷凝器，第二换热器 13与第三换热器 14均为蒸发器，室内机 02送出的低温风为室内制冷，第二电子膨胀阔 11 的阔开度通过第二温度传感器 15 与第一温度传感器 12采集温度的差值，即蒸发过热度来控制；其中， In the cooling condition, the first electronic expansion width 6 and the third electronic expansion width are fully open, and the second electronic expansion is 11 throttling, adjusting the flow rate of the refrigerant flowing through, in the refrigeration condition, the first heat exchanger 4 is a condenser, the second heat exchanger 13 and the third heat exchanger 14 are both evaporators, and the low temperature wind sent by the indoor unit 02 is indoor refrigeration, and the wide opening degree of the second electronic expansion width 11 passes through the second temperature sensor 15 Controlling the difference between the temperature collected by the first temperature sensor 12, that is, the degree of evaporation superheat; wherein

SH = T₁₅ -Τ₁₂ SH = T ₁₅ -Τ ₁₂

式中， SH为蒸发过热度，通过蒸发过热度的计算，控制阔开度； τ₁₅为第二温度传感器 15采集的温度值； In the formula, SH is the degree of evaporation superheat, and the degree of wide opening is controlled by the calculation of the degree of superheat of evaporation; τ ₁₅ is the temperature value collected by the second temperature sensor 15;

τ₁₂为第一温度传感器 12采集的温度值。 τ ₁₂ is the temperature value collected by the first temperature sensor 12.

制热工况下，第三电子膨胀阔 17全开，第一电子膨胀阔 6与第二电子膨胀阔 11节流，相应调节流经的制冷剂流量，在该制热工况下，第一换热器 4为蒸发器，第二换热器 13与第三换热器 14均为冷凝器，室内机 02送出的高温风为室内制热；第二电子膨胀阔 11的阔开度通过高压制冷剂的冷凝温度与第一温度传感器 12采集温度的差值，即冷凝过冷度来控制；其中， Under the heating condition, the third electronic expansion is 17 wide open, the first electronic expansion width 6 and the second electronic expansion are 11 throttling, and the flow rate of the refrigerant flowing through is adjusted accordingly, under the heating condition, the first The heat exchanger 4 is an evaporator, the second heat exchanger 13 and the third heat exchanger 14 are both condensers, and the high temperature wind sent by the indoor unit 02 is indoor heating; the second electronic expansion width 11 is wide open through the high pressure The difference between the condensation temperature of the refrigerant and the temperature collected by the first temperature sensor 12, that is, the condensation subcooling degree; wherein

SC = T -τ₁₂ SC = T -τ ₁₂

式中， In the formula,

SC为冷凝过冷度； SC is the condensation subcooling degree;

T_c为制冷剂的冷凝温度值； T _c is the condensation temperature value of the refrigerant;

不降温除湿工况下，第一电子膨胀阔 6与第二电子膨胀阔 11全开，第三电子膨胀阔 17节流，在该不降温除湿工况下，第一换热器 4与第二换热器 13均为冷凝器，第三换热器 14为蒸发器，流经室内机 02的回风一部分被第二换热器 13加热为热风，另一部分被第三换热器 14除湿冷却，经处理的冷风与热风混合后送入室内，实现室内不降温除湿；第三电子膨胀阔 17的阔开度通过第二温度传感器 15与第三温度传感器 16采集温度的差值，即蒸发过热度来控制。其中， Under the condition of no cooling and dehumidification, the first electronic expansion width 6 and the second electronic expansion width are fully open, and the third electronic expansion is wide and 17 throttling. Under the non-cooling dehumidification condition, the first heat exchanger 4 and the second The heat exchanger 13 is a condenser, the third heat exchanger 14 is an evaporator, a part of the return air flowing through the indoor unit 02 is heated by the second heat exchanger 13 into hot air, and the other part is dehumidified and cooled by the third heat exchanger 14. The treated cold air is mixed with the hot air and sent into the room to realize indoor cooling and dehumidification; the wide opening degree of the third electronic expansion width 17 is collected by the second temperature sensor 15 and the third temperature sensor 16 to obtain a difference in temperature, that is, evaporation Heat to control. among them,

SH' = T₁₅ -T₁₆ SH' = T ₁₅ -T ₁₆

式中， In the formula,

SH'为蒸发过热度； SH' is the degree of evaporation superheat;

τ₁₅为第二温度传感器 15采集的温度值； τ ₁₅ is a temperature value collected by the second temperature sensor 15;

τ₁₆为第三温度传感器 16采集的温度值。 τ ₁₆ is the temperature value collected by the third temperature sensor 16.

图 3 为本发明实施例实现室内不降温除湿的室内机工作示意图。参见图 3 , 第二换热器 13为冷凝器，第三换热器 14为蒸发器，室内侧风扇 10 启动，驱动室内回风流经第二换热器 13以及第三换热器 14, 使得流经室内机 02的回风形成两部分回风，一部分回风被第二换热器 13加热为热风，另一部分回风被第三换热器 14除湿冷却，然后，被第二换热器 13加热形成的热风与被第三换热器 14除湿冷却形成的冷风相混合后送入室内，从而实现室内不降温除湿。图 4为本发明实施例室内机的另一结构示意图。参见图 4, 该实施例为优化可选实施例，采用两组换热器，一组换热器由第二换热器 13与第三换热器 14构成，另一组换热器由第四换热器 13，与第五换热器 14，构成，这两组换热器由钣金件 20连接，形成 V字型换热器，从而可以在室内机有限空间中加大换热面积，提高多联机热泵空调***制冷量、制热量及除湿量。 FIG. 3 is a schematic diagram of the operation of an indoor unit that does not cool down and dehumidify indoors according to an embodiment of the present invention. Referring to FIG. 3, the second heat exchanger 13 is a condenser, the third heat exchanger 14 is an evaporator, the indoor side fan 10 is started, and the return air in the driving chamber flows through the second heat exchanger 13 and the third heat exchanger 14, so that The return air flowing through the indoor unit 02 forms a two-part return air, a part of the return air is heated by the second heat exchanger 13 into hot air, and another part of the return air is dehumidified and cooled by the third heat exchanger 14, and then, the second heat exchanger is used. The hot air formed by the heating is mixed with the cold air formed by the dehumidification and cooling of the third heat exchanger 14, and then sent into the room, thereby achieving no dehumidification and dehumidification in the room. FIG. 4 is another schematic structural diagram of an indoor unit according to an embodiment of the present invention. Referring to FIG. 4, this embodiment is an optimized alternative embodiment, in which two sets of heat exchangers are used, one set of heat exchangers is composed of a second heat exchanger 13 and a third heat exchanger 14, and the other set of heat exchangers is composed of The four heat exchangers 13, which are formed by the fifth heat exchangers 14, are connected by the sheet metal members 20 to form a V-shaped heat exchanger, so that the heat exchange area can be increased in the limited space of the indoor unit. Improve the cooling capacity, heating capacity and dehumidification of multi-line heat pump air conditioning systems.

其中，第二换热器 13的另一端与第四换热器 13，的一端相连；第四换热器 13，的另一端与第三电子膨胀阔 17的一端相连； Wherein the other end of the second heat exchanger 13 is connected to one end of the fourth heat exchanger 13; the other end of the fourth heat exchanger 13 is connected to one end of the third electronic expansion flange 17;

第三电子膨胀阔 17的另一端与第三换热器 14的一端相连，第三温度传感器 16布置于第三电子膨胀阔 17与第三换热器 14之间且靠近第三换热器 14一端的制冷剂管路上； The other end of the third electronic expansion width 17 is connected to one end of the third heat exchanger 14, and the third temperature sensor 16 is disposed between the third electronic expansion flange 17 and the third heat exchanger 14 and adjacent to the third heat exchanger 14 On one end of the refrigerant line;

第三换热器 14的另一端与第五换热器 14，的一端相连； The other end of the third heat exchanger 14 is connected to one end of the fifth heat exchanger 14;

第五换热器 14，的另一端与第一截止阔 8的另一端相连，第二温度传感器 15布置于第五换热器 14，与第一截止阔 8之间且靠近第五换热器 14，一端的制冷剂管路上。 The other end of the fifth heat exchanger 14 is connected to the other end of the first cut-off width 8, and the second temperature sensor 15 is disposed between the fifth heat exchanger 14 and the first cut-off width 8 and close to the fifth heat exchanger. 14, on one end of the refrigerant line.

本发明实施例中，在换热器功能上，通过制冷剂管路连接，第二换热器 13与第四换热器 13，功能相同，第三换热器 14与第五换热器 14，功能相同，也就是说，第二换热器 13与第四换热器 13，同为冷凝器或同为蒸发器，第三换热器 14与第五换热器 14，同为蒸发器或同为冷凝器。 In the embodiment of the present invention, in the function of the heat exchanger, the second heat exchanger 13 and the fourth heat exchanger 13 have the same function, and the third heat exchanger 14 and the fifth heat exchanger 14 are connected through the refrigerant pipeline. The functions are the same, that is, the second heat exchanger 13 and the fourth heat exchanger 13, the same as the condenser or the same evaporator, the third heat exchanger 14 and the fifth heat exchanger 14, the same as the evaporator Or the same as the condenser.

以不降温除湿工况时的制冷剂与送风循环过程为例，在图 4 中，制冷剂依次流过第二电子膨胀阔 11、第二换热器 13、第四换热器 13，、第三电子膨胀阔 17、第三换热器 14与第五换热器 14，，在该工况下，第二电子膨胀阔 11全开且第三电子膨胀阔 17节流，第二换热器 13与第四换热器 13，均为冷凝器，第三换热器 14与第五换热器 14，均为蒸发器，经处理后的回风从上之下依次为热风、冷风、热风与冷风，即从第二换热器 13流出的为热风，第三换热器 14流出的为冷风，从第四换热器 13，流出的为热风，从第五换热器 14，流出的为冷风，热风与冷风混合形成送风。这样，有助于不同温度的送风间的混合，从而提高送风舒适性及多联机热泵空调***热力性能。 Taking the refrigerant and air supply circulation process in the case of not dehumidifying and dehumidifying working conditions as an example, in FIG. 4, the refrigerant sequentially flows through the second electronic expansion wide 11, the second heat exchanger 13, and the fourth heat exchanger 13, a third electronic expansion width 17, a third heat exchanger 14 and a fifth heat exchanger 14, under the operating condition, the second electronic expansion width 11 is fully open and the third electron expansion is 17 throttling, the second heat exchange The third heat exchanger 13 and the fourth heat exchanger 13 are both condensers, and the third heat exchanger 14 and the fifth heat exchanger 14 are both evaporators. The processed return air is hot air and cold air from top to bottom. Hot air and cold air, that is, hot air flowing out from the second heat exchanger 13, cold air flowing out from the third heat exchanger 14, and hot air flowing out from the fourth heat exchanger 13, flowing out from the fifth heat exchanger 14, The cold wind, hot air and cold air mix to form the air supply. In this way, it contributes to the mixing of the air supply at different temperatures, thereby improving the air supply comfort and the thermal performance of the multi-line heat pump air conditioning system.

本实施例中，图 3和图 4中，各电子膨胀阔的控制规律与图 2相同。图 4中，第二温度传感器 15布置于第一截止阔 8与第五换热器 14，之间且靠近第五换热器 14，一端的制冷剂管路上，其它温度传感器位置不变。 In the present embodiment, in Figs. 3 and 4, the control law of each electronic expansion is the same as that of Fig. 2. In Fig. 4, the second temperature sensor 15 is disposed between the first cut-off width 8 and the fifth heat exchanger 14, and is adjacent to the refrigerant line at one end of the fifth heat exchanger 14, and the other temperature sensors are not in position.

图 5为本发明实施例室内机的再一结构示意图。参见图 5 , 与图 3不同的是，采用并联的热力膨胀阔 18与电磁阔 19代替第三电子膨胀阔 17, 即热力膨胀阔 18的一端与电磁阔 19的一端相连，并与第二换热器 13的另一端相连，热力膨胀阔 18的另一端与电磁阔 19的另一端相连，并与第三换热器 14的一端相连，热力膨胀阔的感温包 15，布置于第一截止阔 8与第三换热器 14之间且靠近第三换热器 14一端的制冷剂管路上。 FIG. 5 is a schematic structural diagram of still another embodiment of an indoor unit according to an embodiment of the present invention. See Figure 5, different from Figure 3. The heat expansion width 18 and the electromagnetic width 19 in parallel are used instead of the third electronic expansion width 17, that is, one end of the thermal expansion width 18 is connected to one end of the electromagnetic width 19, and is connected to the other end of the second heat exchanger 13. The other end of the thermal expansion width 18 is connected to the other end of the electromagnetic wide 19, and is connected to one end of the third heat exchanger 14, and the thermal expansion package 15 is arranged in the first cut-off width 8 and the third heat exchanger. Between 14 and near the refrigerant line at one end of the third heat exchanger 14.

本发明实施例中，不同工况下各换热器功能与图 2所示实施例中对应换热器功能相同，两实施例（图 2和图 5 ) 中，第一电子膨胀阔 6与第二电子膨胀阔 11的控制规律也分别对应相同。不同的是，本实施例中，采用并联的热力膨胀阔 18与电磁阔 19代替第三电子膨胀阔 17 ,其对应规律如下：电磁阔 19打开时对应第三电子膨胀阔 17全开；电磁阔 19关闭且热力膨胀阔 18调节时对应第三电子膨胀阔 17节流调节，热力膨胀阔 18的阔开度由感温包 15，测得的温度进行控制。 In the embodiment of the present invention, the functions of the heat exchangers under different working conditions are the same as those of the corresponding heat exchangers in the embodiment shown in FIG. 2. In the two embodiments (Fig. 2 and Fig. 5), the first electronic expansion is 6 and the first The control laws of the two electronic expansion widths 11 are also the same respectively. The difference is that, in this embodiment, the parallel thermal expansion 18 and the electromagnetic width 19 are used instead of the third electronic expansion width 17, and the corresponding law is as follows: When the electromagnetic width 19 is opened, the third electronic expansion is wide and 17 is fully open; 19 is closed and the thermal expansion is 18 when the adjustment is made corresponding to the third electronic expansion and 17 throttling adjustment, and the wide opening of the thermal expansion width 18 is controlled by the temperature sensing package 15 and the measured temperature.

由上述可见，本发明实施例的多联机热泵空调***，室外机可以共用，室内机无需额外增加再热换热器，通过室内机中换热器端面的弯管连接与焊接，从而将一个换热器分为上下两部分，具备较高经济性，从而效降低设备成本，并可实现各室内机的集中管理，可单独启动一台室内机运行，也可多台室内机同时启动运行，使得控制更加灵活；室内机可实现夏季制冷、冬季制热和梅雨季节不降温除湿功能，从而提高送风舒适性；进一步地，本发明实施例的室内机和室外机均采用电子膨胀阔，无需开发专用除湿电磁阔或增加电磁阔，从而保证了***控制精度，并降低了***控制难度。 It can be seen from the above that the multi-in-line heat pump air-conditioning system of the embodiment of the present invention can be shared by the outdoor unit, and the indoor unit does not need to additionally add a reheat heat exchanger, and the elbow connection and welding of the end face of the heat exchanger in the indoor unit are performed, thereby changing one. The heat exchanger is divided into upper and lower parts, which is highly economical, so as to reduce the equipment cost and realize centralized management of each indoor unit. It can start an indoor unit operation alone, or multiple indoor units can be started at the same time, so that The control is more flexible; the indoor unit can realize the summer cooling, the winter heating and the rainy season without the cooling and dehumidifying function, thereby improving the air supply comfort; further, the indoor unit and the outdoor unit of the embodiment of the invention are all expanded by electronic expansion, and need no development. Dedicated dehumidification electromagnetic wide or increased electromagnetic width, thus ensuring system control accuracy and reducing system control difficulty.

图 6 为本发明实施例控制多联机热泵空调***的方法流程示意图。参见图 6, 该流程包括： 6 is a schematic flow chart of a method for controlling a multi-line heat pump air conditioning system according to an embodiment of the present invention. See Figure 6. The process includes:

步骤 601 , 室外机的汇流单元接收切换单元的第三端输出的制冷剂，进行气液分离以及压缩后，输出至切换单元的第一端； Step 601, the sink unit of the outdoor unit receives the refrigerant outputted from the third end of the switching unit, performs gas-liquid separation and compression, and outputs the refrigerant to the first end of the switching unit;

本步骤中，切换单元包括：四通换向阔以及第一截止阔，其中，四通换向阔的第一端与汇流单元的输出端相连，第二端与第一换热单元的输入端相连，第三端与汇流单元的输入端相连，第四端与第一截止阔的一端相连，第一截止阔的另一端与室内机的第一端相连； In this step, the switching unit includes: a four-way commutation width and a first cut-off width, wherein the first end of the four-way commutation is connected to the output end of the confluence unit, and the second end is connected to the input end of the first heat exchange unit Connected, the third end is connected to the input end of the busbar unit, the fourth end is connected to the first cut-off wide end, and the other end of the first cut-off width is connected to the first end of the indoor unit;

汇流单元包括：压缩机、单向阔以及气液分离器，其中， The confluence unit includes: a compressor, a unidirectional wide, and a gas-liquid separator, wherein

压缩机的输出端与单向阔的输入端相连，单向阔的输出端与四通换向阔的第一端相连，气液分离器的输入端与四通换向阔的第三端相连，气液分离器的输出端与压缩机的输入端相连。 The output end of the compressor is connected to the unidirectional wide input end, the unidirectional wide output end is connected to the first end of the four-way reversing width, and the input end of the gas-liquid separator is connected to the third end of the four-way reversing wide , gas and liquid The output of the separator is connected to the input of the compressor.

步骤 602, 判断多联机热泵空调***所处的工况，如果处于制冷和不降温除湿工况，执行步骤 603 , 如果处于制热工况，执行步骤 604; Step 602, judging the working condition of the multi-connected heat pump air conditioning system, if it is in the cooling and non-cooling dehumidification conditions, step 603 is performed, if it is in the heating condition, step 604 is performed;

步骤 603 ,驱动切换单元与第一端相连的第二端输出的制冷剂依次流经第一换热单元以及室内机的第二电子膨胀阔、第二换热器、第三电子膨胀阔、第三换热器，经切换单元中的第一截止阔流回至切换单元的第四端，再从切换单元的第三端输出； Step 603, the refrigerant outputted by the second end of the driving switching unit connected to the first end sequentially flows through the first heat exchange unit and the second electronic expansion of the indoor unit, the second heat exchanger, and the third electronic expansion wide, a third heat exchanger, which is returned to the fourth end of the switching unit via the first cutoff in the switching unit, and then outputted from the third end of the switching unit;

本步骤中，第一换热单元包括：第一换热器、室外侧风扇、第一电子膨胀阔以及第二截止阔，其中， In this step, the first heat exchange unit includes: a first heat exchanger, an outdoor side fan, a first electronic expansion width, and a second cut-off width, wherein

室内机还包括：用于驱动室内回风流经第二换热器和第三换热器的室内侧风扇； The indoor unit further includes: a chamber inner fan for driving the indoor return air through the second heat exchanger and the third heat exchanger;

这样，该步骤包括： Thus, the steps include:

四通换向阔的第一端与第二端连通，第三端与第四端连通，制冷剂依次流经四通换向阔的第二端、第一换热器、第一电子膨胀阔、第二截止阔、第二电子膨胀阔、第二换热器、第三电子膨胀阔、第三换热器、第一截止阔、四通换向阔的第四端，再从四通换向阔的第三端流经气液分离器进入压缩机的吸气口。 The first end of the four-way reversing width is in communication with the second end, and the third end is in communication with the fourth end, and the refrigerant sequentially flows through the four-way reversing second end, the first heat exchanger, and the first electronic expansion , the second cut-off width, the second electronic expansion wide, the second heat exchanger, the third electronic expansion wide, the third heat exchanger, the first cut-off wide, the fourth end of the four-way commutation, and then from the four-way The wide third end flows through the gas-liquid separator into the suction port of the compressor.

其中，在制冷工况下，第一电子膨胀阔与第三电子膨胀阔全开，第二电子膨胀阔节流，第一换热器为冷凝器，第二换热器与第三换热器均为蒸发器，室内机送出的低温风为室内制冷，第二电子膨胀阔的阔开度通过第二温度传感器与第一温度传感器采集温度的差值控制。 Wherein, in the cooling condition, the first electron expansion is wide and the third electron expansion is wide open, the second electronic expansion is wide throttle, the first heat exchanger is a condenser, and the second heat exchanger and the third heat exchanger All of them are evaporators, and the low temperature wind sent by the indoor unit is indoor refrigeration, and the wide opening degree of the second electronic expansion is controlled by the difference between the temperature collected by the second temperature sensor and the first temperature sensor.

步骤 604,驱动切换单元与第一端相连的第四端输出的制冷剂依次流经室内机的第三换热器、第三电子膨胀阔、第二换热器、第二电子膨胀阔，经室外机的第二截止阔以及第一换热单元流回至切换单元的第二端，再从切换单元的第三端输出。 Step 604, the refrigerant outputted by the fourth end of the driving switching unit connected to the first end sequentially flows through The third heat exchanger of the indoor unit, the third electronic expansion wide, the second heat exchanger, and the second electronic expansion are wide, and the second cut-off width of the outdoor unit and the first heat exchange unit flow back to the second end of the switching unit And output from the third end of the switching unit.

本步骤具体为： This step is specifically as follows:

四通换向阔的第一端与第四端连通，第二端与第三端连通，制冷剂依次流经四通换向阔的第四端、第一截止阔、第三换热器、第三电子膨胀阔、第二换热器、第二电子膨胀阔、第二截止阔、第一电子膨胀阔、第一换热器、四通换向阔的第二端，再从四通换向阔的第三端流经气液分离器，进入压缩机的吸气口。 The first end of the four-way reversing width is in communication with the fourth end, and the second end is in communication with the third end, and the refrigerant sequentially flows through the four-way reversing wide fourth end, the first cut-off wide, the third heat exchanger, The third electronic expansion is wide, the second heat exchanger, the second electronic expansion is wide, the second cut-off is wide, the first electronic expansion is wide, the first heat exchanger, the second end of the four-way commutation is wide, and then the four-way is changed. Flow through the gas-liquid separator to the wide third end and into the suction port of the compressor.

其中，第三电子膨胀阔全开，第一电子膨胀阔与第二电子膨胀阔节流，第一换热器为蒸发器，第二换热器与第三换热器均为冷凝器，室内机送出的高温风为室内制热；第二电子膨胀阔的阔开度通过高压制冷剂的冷凝温度与第温度传、感'器采集温 ^的、差值控制。、 '一 ,、 ^ 、 ^ 发明的精神和范围。这样，倘若对本发明的这些修改和变型属于本发明权利要求及其等同技术的范围之内，则本发明也包含这些改动和变型在内。 Wherein, the third electronic expansion is wide open, the first electronic expansion is wide and the second electronic expansion is wide, the first heat exchanger is an evaporator, and the second heat exchanger and the third heat exchanger are both condensers, indoor The high temperature wind sent by the machine is indoor heating; the wide opening degree of the second electronic expansion is controlled by the condensation temperature of the high-pressure refrigerant and the temperature difference between the first temperature sensor and the sensor. , '一 , , ^ , ^ The spirit and scope of the invention. Thus, it is intended that the present invention cover the modifications and variations of the invention and

Claims

权利要求书 Claim

1. 一种多联机热泵空调***，其特征在于，该***包括：室外机以及室内机，其中， A multi-line heat pump air conditioning system, the system comprising: an outdoor unit and an indoor unit, wherein

2. 根据权利要求 1所述的***，其特征在于，所述切换单元包括：四通换向阔以及第一截止阔，其中， 2. The system according to claim 1, wherein the switching unit comprises: a four-way commutation width and a first cutoff width, wherein

四通换向阔的第一端与汇流单元的输出端相连，第二端与第一换热单元的输入端相连，第三端与汇流单元的输入端相连，第四端与第一截止阔的一端相连，第一截止阔的另一端与室内机的第一端相连。 The first end of the four-way reversing width is connected to the output end of the confluence unit, the second end is connected to the input end of the first heat exchange unit, the third end is connected to the input end of the confluence unit, and the fourth end is connected to the first end One end of the first cut-off is connected to the first end of the indoor unit.

3. 根据权利要求 2所述的***，其特征在于，所述汇流单元包括：压缩机、单向阔以及气液分离器，其中， The system according to claim 2, wherein the manifold unit comprises: a compressor, a unidirectional wide, and a gas-liquid separator, wherein

压缩机的输出端与单向阔的输入端相连，单向阔的输出端与四通换向阔的第一端相连，气液分离器的输入端与四通换向阔的第三端相连，气液分离器的输出端与压缩机的输入端相连。 The output end of the compressor is connected to the unidirectional wide input end, the unidirectional wide output end is connected to the first end of the four-way reversing width, and the input end of the gas-liquid separator is connected to the third end of the four-way reversing wide The output of the gas-liquid separator is connected to the input of the compressor.

4. 根据权利要求 3所述的***，其特征在于，所述第一换热单元包括：第一换热器、室外侧风扇、第一电子膨胀阔以及第二截止阔，其中， The system according to claim 3, wherein the first heat exchange unit comprises: a first heat exchanger, an outdoor side fan, a first electronic expansion width, and a second cut-off width, wherein

5. 根据权利要求 4所述的***，其特征在于，所述压缩机由一台或多台定速压缩机构成，或由变速压缩机构成，或由定速压缩机与变速压缩机组合构成。 5. The system according to claim 4, wherein the compressor is composed of one or more fixed speed compressors, or is composed of a variable speed compressor, or is composed of a combination of a fixed speed compressor and a variable speed compressor. .

6. 根据权利要求 4所述的***，其特征在于， 6. The system of claim 4, wherein

7. 根据权利要求 4所述的***，其特征在于，所述第一换热器、第二换热器和第三换热器为铝箔翅片铜管换热器或铝制翅片式微通道换热器。 7. The system according to claim 4, wherein the first heat exchanger, the second heat exchanger and the third heat exchanger are aluminum foil finned copper tube heat exchangers or aluminum finned microchannels Heat Exchanger.

8. 根据权利要求 4所述的***，其特征在于，所述第二换热器处于第三换热器的上部。 8. The system of claim 4, wherein the second heat exchanger is in the The upper part of the three heat exchangers.

9. 根据权利要求 1至 8任一项所述的***，其特征在于，所述室内机进一步包括：第一温度传感器、第二温度传感器以及第三温度传感器，其中， The system according to any one of claims 1 to 8, wherein the indoor unit further comprises: a first temperature sensor, a second temperature sensor, and a third temperature sensor, wherein

10. 根据权利要求 9所述的***，其特征在于，制冷剂由压缩机排气口排出进入单向阔，由单向阔输出的高压制冷剂气体进入四通换向阔的第一端； 10. The system according to claim 9, wherein the refrigerant is discharged from the compressor exhaust port into a one-way wide, and the high-pressure refrigerant gas that is unidirectionally wide-output enters the first end of the four-way reversing width;

11. 根据权利要求 10所述的***，其特征在于， 11. The system of claim 10, wherein

在制冷工况下，第一电子膨胀阔与第三电子膨胀阔全开，第二电子膨胀阔节流，第一换热器为冷凝器，第二换热器与第三换热器均为蒸发器，室内机送出的低温风为室内制冷，第二电子膨胀阔的阔开度通过第二温度传感器与第一温度传感器采集温度的差值控制； In the cooling condition, the first electronic expansion is wide and the third electronic expansion is wide open, the second electronic expansion is wide throttle, the first heat exchanger is a condenser, and the second heat exchanger and the third heat exchanger are both The evaporator, the low temperature wind sent by the indoor unit is indoor refrigeration, and the second electronic expansion has a wide opening degree through the second temperature The difference between the temperature of the sensor and the temperature collected by the first temperature sensor is controlled;

在不降温除湿工况下，第一电子膨胀阔与第二电子膨胀阔全开，第三电子膨胀阔节流，第一换热器与第二换热器均为冷凝器，第三换热器为蒸发器，流经室内机的回风一部分被第二换热器加热为热风，另一部分被第三换热器除湿冷却，经处理的冷风与热风混合后送入室内；第三电子膨胀阔的阔开度通过第二温度传感器与第三温度传感器采集温度的差值控制；在制热工况下，第三电子膨胀阔全开，第一电子膨胀阔与第二电子膨胀阔节流，第一换热器为蒸发器，第二换热器与第三换热器均为冷凝器，室内机送出的高温风为室内制热；第二电子膨胀阔的阔开度通过高压制冷剂的冷凝温度与第一温度传感器采集温度的差值控制。 In the case of no cooling and dehumidification, the first electronic expansion is wide and the second electronic expansion is wide open, the third electronic expansion is wide, the first heat exchanger and the second heat exchanger are both condensers, and the third heat exchange The evaporator is an evaporator, a part of the return air flowing through the indoor unit is heated by the second heat exchanger to be hot air, and the other part is dehumidified and cooled by the third heat exchanger, and the treated cold air is mixed with the hot air and sent into the room; the third electronic expansion The wide openness is controlled by the difference between the temperature collected by the second temperature sensor and the third temperature sensor; in the heating condition, the third electronic expansion is wide open, the first electronic expansion is wide and the second electronic expansion is widened The first heat exchanger is an evaporator, the second heat exchanger and the third heat exchanger are both condensers, and the high temperature wind sent by the indoor unit is indoor heating; the second electronic expansion wide opening is passed through the high pressure refrigerant The condensing temperature is controlled by the difference between the temperature collected by the first temperature sensor.

12. 根据权利要求 9所述的***，其特征在于，所述室内机进一步包括：第四换热器以及第五换热器，其中， The system according to claim 9, wherein the indoor unit further comprises: a fourth heat exchanger and a fifth heat exchanger, wherein

由第二换热器与第三换热器构成一组换热器，由第四换热器与第五换热器构成另一组换热器，两组换热器由钣金件连接，形成 V字型换热器。 The second heat exchanger and the third heat exchanger form a set of heat exchangers, and the fourth heat exchanger and the fifth heat exchanger form another heat exchanger, and the two heat exchangers are connected by a sheet metal piece. Form a V-shaped heat exchanger.

13. 根据权利要求 12所述的***，其特征在于，所述第二换热器的另一端与第四换热器的一端相连； 13. The system according to claim 12, wherein the other end of the second heat exchanger is connected to one end of the fourth heat exchanger;

第四换热器的另一端与第三电子膨胀阔的一端相连； The other end of the fourth heat exchanger is connected to one end of the third electronic expansion;

14. 根据权利要求 13所述的***，其特征在于，在不降温除湿工况下，制冷剂依次流过第二电子膨胀阔、第二换热器、第四换热器、第三电子膨胀阔、第三换热器与第五换热器，第二电子膨胀阔全开且第三电子膨胀阔节流，第二换热器与第四换热器均为冷凝器，第三换热器与第五换热器均为蒸发器，从第二换热器流出的为热风，第三换热器流出的为冷风，从第四换热器流出的为热风，从第五换热器流出的为冷风，所述热风与冷风混合形成送风。 14. The system according to claim 13, wherein the refrigerant sequentially flows through the second electronic expansion wide, the second heat exchanger, the fourth heat exchanger, and the third electronic expansion without cooling and dehumidifying conditions. a wide, a third heat exchanger and a fifth heat exchanger, the second electronic expansion is wide open and the third electronic expansion is wide throttle, the second heat exchanger and the fourth heat exchanger are both condensers, the third heat exchange The fifth heat exchanger is an evaporator, the hot air flows from the second heat exchanger, the cold air flows from the third heat exchanger, and the hot air flows from the fourth heat exchanger. From the fifth heat exchanger The cold air is discharged, and the hot air is mixed with the cold air to form a supply air.

15. 根据权利要求 9所述的***，其特征在于，所述第三电子膨胀阔为并联的热力膨胀阔与电磁阔，热力膨胀阔的感温包布置于第一截止阔与第三换热器之间且靠近第三换热器一端的制冷剂管路上，其中， The system according to claim 9, wherein the third electronic expansion is a parallel thermal expansion and an electromagnetic wide, and the thermal expansion is arranged in the first cut-off width and the third heat exchange. Between the heaters and the refrigerant line near one end of the third heat exchanger, wherein

16. 一种控制多联机热泵空调***的方法，该方法包括： 16. A method of controlling a multi-line heat pump air conditioning system, the method comprising:

判断多联机热泵空调***所处的工况： Judging the working conditions of the multi-line heat pump air conditioning system:

B , 如果处于制冷和不降温除湿工况，驱动切换单元与第一端相连的第二端输出的制冷剂依次流经第一换热单元以及室内机的第二电子膨胀阔、第二换热器、第三电子膨胀阔、第三换热器，经切换单元中的第一截止阔流回至切换单元的第四端，再从切换单元的第三端输出； B. If it is in a cooling and non-cooling dehumidification condition, the refrigerant outputted by the second end connected to the first end of the driving switching unit sequentially flows through the first heat exchange unit and the second electronic expansion of the indoor unit, and the second heat exchange , the third electronic expansion wide, and the third heat exchanger, return to the fourth end of the switching unit via the first cutoff in the switching unit, and then output from the third end of the switching unit;

17. 根据权利要求 16所述的方法，其中， 17. The method according to claim 16, wherein

所述第一换热单元包括：第一换热器、室外侧风扇、第一电子膨胀阔以及第二截止阔，其中，第一换热器的一端与四通换向阔的第二端相连，另一端与第一电子膨月长阔的一端相连； The first heat exchange unit includes: a first heat exchanger, an outdoor side fan, a first electronic expansion width, and a second cut-off width, wherein One end of the first heat exchanger is connected to the second end of the four-way reversing width, and the other end is connected to one end of the first electronic expansive moon;

18. 根据权利要求 17所述的方法，其中，所述步骤 B包括： 18. The method according to claim 17, wherein the step B comprises:

其中，在制冷工况下，第一电子膨胀阔与第三电子膨胀阔全开，第二电子膨胀阔节流，第一换热器为冷凝器，第二换热器与第三换热器均为蒸发器，室内机送出的低温风为室内制冷，第二电子膨胀阔的阔开度通过第二温度传感器与第一温度传感器采集温度的差值控制； Wherein, in the cooling condition, the first electron expansion is wide and the third electron expansion is wide open, the second electronic expansion is wide throttle, the first heat exchanger is a condenser, and the second heat exchanger and the third heat exchanger All are evaporators, the low temperature wind sent by the indoor unit is indoor refrigeration, and the wide opening degree of the second electronic expansion is controlled by the difference between the temperature collected by the second temperature sensor and the first temperature sensor;

19. 根据权利要求 17所述的方法，其中，所述步骤 C包括： 19. The method according to claim 17, wherein the step C comprises:

其中，第三电子膨胀阔全开，第一电子膨胀阔与第二电子膨胀阔节流，第一换热器为蒸发器，第二换热器与第三换热器均为冷凝器，室内机送出的高温风为室内制热；第二电子膨胀阔的阔开度通过高压制冷剂的冷凝温度与第一温度传感器采集温度的差值控制。 Wherein, the third electronic expansion is wide open, the first electronic expansion is wide and the second electronic expansion is wide, the first heat exchanger is an evaporator, and the second heat exchanger and the third heat exchanger are both condensers, indoor Machine delivery The high temperature wind is indoor heating; the second electronic expansion wide opening degree is controlled by the difference between the condensation temperature of the high pressure refrigerant and the temperature collected by the first temperature sensor.