WO2014043951A1 - Method for controlling temperature and humidity in a multi air-conditioning system and multi air conditioning system - Google Patents

Method for controlling temperature and humidity in a multi air-conditioning system and multi air conditioning system Download PDF

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Publication number
WO2014043951A1
WO2014043951A1 PCT/CN2012/082962 CN2012082962W WO2014043951A1 WO 2014043951 A1 WO2014043951 A1 WO 2014043951A1 CN 2012082962 W CN2012082962 W CN 2012082962W WO 2014043951 A1 WO2014043951 A1 WO 2014043951A1
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WIPO (PCT)
Prior art keywords
heat exchanger
air
width
wide
wind
Prior art date
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PCT/CN2012/082962
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French (fr)
Chinese (zh)
Inventor
刘敏
张文强
邓玉平
Original Assignee
青岛海信日立空调系统有限公司
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Priority to CN201210350129.6A priority Critical patent/CN102878613B/en
Priority to CN201210350129.6 priority
Application filed by 青岛海信日立空调系统有限公司 filed Critical 青岛海信日立空调系统有限公司
Publication of WO2014043951A1 publication Critical patent/WO2014043951A1/en

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Classifications

    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F25REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
    • F25BREFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT-PUMP SYSTEMS
    • F25B13/00Compression machines, plant or systems with reversible cycle
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24HEATING; RANGES; VENTILATING
    • F24FAIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
    • F24F3/00Air-conditioning systems in which conditioned primary air is supplied from one or more central stations to distributing units in the rooms or spaces where it may receive secondary treatment; Apparatus specially designed for such systems
    • F24F3/06Air-conditioning systems in which conditioned primary air is supplied from one or more central stations to distributing units in the rooms or spaces where it may receive secondary treatment; Apparatus specially designed for such systems characterised by the arrangements for the supply of heat-exchange fluid for the subsequent treatment of primary air in the room units
    • F24F3/065Air-conditioning systems in which conditioned primary air is supplied from one or more central stations to distributing units in the rooms or spaces where it may receive secondary treatment; Apparatus specially designed for such systems characterised by the arrangements for the supply of heat-exchange fluid for the subsequent treatment of primary air in the room units with a plurality of evaporators or condensers
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24HEATING; RANGES; VENTILATING
    • F24FAIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
    • F24F11/00Control or safety arrangements
    • F24F11/70Control systems characterised by their outputs; Constructional details thereof
    • F24F11/80Control systems characterised by their outputs; Constructional details thereof for controlling the temperature of the supplied air
    • F24F11/83Control systems characterised by their outputs; Constructional details thereof for controlling the temperature of the supplied air by controlling the supply of heat-exchange fluids to heat-exchangers
    • F24F11/84Control systems characterised by their outputs; Constructional details thereof for controlling the temperature of the supplied air by controlling the supply of heat-exchange fluids to heat-exchangers using valves

Abstract

Disclosed are a method for controlling temperature and humidity in a multi air-conditioning system and the multi air conditioning system. The method includes: the first stream of refrigerant inputted from a switching unit (3) of an outdoor unit (01) and the second stream of refrigerant inputted from the third port (9) of the outdoor unit (01) are converged and then shunted to output a first stream of refrigerant and a second stream of refrigerant respectively after being compressed by a shunting unit; the second stream of refrigerant outputted from the shunting unit passes through the first port (7) of the outdoor unit (01) to the first port of an indoor unit (02), and then passes through a second condenser (33) and an evaporator (34) of the indoor unit (02) orderly and flows out from the third port of the indoor unit (02) and is refluxed to the shunting unit through the third port (9) of the outdoor unit (01); the first stream of refrigerant outputted from the shunting unit is switched to orderly flow through a first condenser (4), a first evaporator (37) and is entered into the shunting unit.

Description

 Method for controlling temperature and humidity in multi-connected air conditioning system and multi-connected air conditioning system

Technical field

 The invention relates to a multi-connected air-conditioning control technology, in particular to a method for controlling temperature and humidity in a multi-connected air-conditioning system and a multi-connected air-conditioning system. Background technique

 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, multi-connected air-conditioning technology is an important direction for the development of air-conditioning because of its advantages of freedom of control, high efficiency and energy saving, and ease of installation and maintenance.

 The multi-connected air conditioning system is mainly used to control the temperature and humidity in the room. Generally, it includes one or more outdoor units, one or more indoor units, and a line controller. The line controller is connected to the indoor unit, and the indoor unit is connected to the outdoor unit. . The outdoor unit is generally composed of an outdoor side heat exchanger, a compressor and other refrigeration accessories. The indoor unit is composed of a fan and a heat exchanger. Compared with a plurality of household air conditioners, the outdoor unit of the multi-connected air conditioning system is shared, which can effectively reduce the equipment. Cost, and can 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, making the control more flexible.

When the multi-connected air conditioning system processes the air, it needs to adjust and control the temperature, humidity and the number of fresh air exchanges. Among them, the humidity control is relatively more difficult. In the existing multi-connected air conditioning system, the cooling and dehumidifying methods of the fresh air and the return air alone and the dehumidification mode of the rotor are used to adjust the indoor air comfort. Among them, the method of cooling and dehumidifying, on the one hand, excessively reducing the supply air temperature will lead to high energy consumption of the multi-connected air conditioning system, and the evaporation temperature is lowered, and the decrease of the evaporation temperature will lead to a decrease in the energy efficiency ratio of the multi-connected air conditioning system. In order to avoid the uncomfortable feeling caused by the cold blowing feeling to the user, it is necessary to use electric heating wire heating for the air supply, which will further increase the energy consumption of the multi-connected air conditioning system. The system using the wheel dehumidification can concentrate the air humidity in the case of large air volume. However, in order to regenerate the moisture absorbing material, the method must be heated by the electric heating wire for the return air, and the overall energy consumption of the multi-connected air conditioning system is additionally increased. In addition, the rotor dehumidification system is bulky and cannot be used with the air supply end of the multi-connected air conditioning system. Therefore, based on the consideration of energy consumption, the temperature and humidity control of the multi-connected air conditioning system scenario is not suitable for the cooling and dehumidification method and the rotary dehumidification system. In order to reduce the power consumption of the multi-connected air conditioning system and improve the cooling performance of the multi-connected air conditioning system, the prior art proposes an improved method, that is, adding a total heat exchanger to the indoor unit of the multi-connected air conditioning system, and controlling the indoors through the total heat exchanger. Humidity, return air cooling or heat, and achieve fresh air ventilation. The mass transfer inside the total heat exchanger is due to the pressure difference between the outdoor fresh air and the water vapor partial pressure in the indoor return air. The water vapor passes through the moisture permeable paper of the total heat exchanger core to transfer mass between the fresh air and the return air. The limited moisture permeability of the internal paper limits the heat and mass transfer capacity of the total heat exchanger, resulting in dehumidification in summer and insufficient humidification in winter. In addition, the total heat exchanger cannot bear the sensible heat load in the room. Among them, sensible heat is a change in the temperature of the substance when heat is added or removed without phase change. The control of the sensible heat load depends on the end of the indoor unit of the multi-connected air conditioning system, and the combination of the end of the indoor unit and the total heat exchanger makes the user's investment high and the installation and maintenance inconvenient.

 It can be seen from the above that the existing cooling and dehumidifying means and the wheel dehumidification system are not suitable for the multi-connected air conditioning system because of the low energy efficiency ratio and large volume; and the multi-connected air conditioning system uses the indoor air supply end and the total heat exchanger in combination, The indoor temperature and humidity are separately controlled, but this leads to high user cost, and the indoor equipment is not compact enough, the installation and maintenance are inconvenient, and the energy efficiency of the multi-connected air conditioning system is relatively low. Summary of the invention

 Embodiments of the present invention provide a method of controlling temperature and humidity in a multi-connected air conditioning system to improve an energy efficiency ratio of operation of a multi-connected air conditioning system.

 Embodiments of the present invention also provide a multi-connected air conditioning system that improves the energy efficiency ratio of a multi-connected air conditioning system.

 In order to achieve the above objective, a multi-connected air conditioning system according to an embodiment of the present invention includes: an outdoor unit and an indoor unit, wherein

 The outdoor unit includes: a control unit, a splitting unit, a switching unit, a first heat exchanger, a first end, a second end, a third end, and a fourth end;

The indoor unit includes: a first air chamber unit, a second air chamber unit, and a third air chamber unit, wherein the first air chamber unit is provided with a second heat exchanger, a fresh air passage, a first air supply passage, and a first wind a chamber, a fresh air passage and a first air supply passage are respectively located at two sides of the first air chamber unit; the second air chamber unit is provided with a third heat exchanger, a first air return passage, an exhaust air passage, a second air chamber, and a second air chamber The first end and the third end, the first return air passage and the exhaust air passage are respectively located at two sides of the second air chamber unit; and the third air chamber unit is provided with the second end, the fourth end, the fourth heat exchanger, and the second a second return air passage, a second air supply passage, and a third air chamber, wherein the second return air passage and the second air supply passage are respectively located at two sides of the third air chamber unit; a control unit, configured to control the first heat exchanger as a condenser and a fourth heat exchanger as an evaporator when the multi-connected air conditioning system is in a cooling condition; and control the first when the multi-connected air conditioning system is in a heating condition The heat exchanger acts as an evaporator and the fourth heat exchanger acts as a condenser;

 a flow dividing unit, configured to merge the first refrigerant input by the switching unit and the second refrigerant input to the third end of the outdoor unit, and after being compressed, perform splitting, respectively outputting the first refrigerant and the second refrigerant Agent

 a first end of the outdoor unit, configured to output the second refrigerant outputted by the flow dividing unit to the first end of the indoor unit;

 a switching unit, configured to: when the multi-connected air conditioning system is in a cooling condition, switch the first refrigerant outputted by the flow dividing unit to flow through the first heat exchanger, and output to the indoor unit through the fourth end of the outdoor unit The fourth end, and passing through the fourth heat exchanger of the indoor unit, is returned from the second end of the indoor unit to the second end of the outdoor unit, and enters the diverting unit through the second end of the outdoor unit;

 When the multi-connected air conditioning system is in a heating condition, the first refrigerant is switched to the second end of the indoor unit via the second end, and flows through the fourth heat exchanger through the second end of the indoor unit through the indoor unit The fourth end flows out and flows into the fourth end of the outdoor unit, flows through the first heat exchanger through the fourth end of the outdoor unit, and then flows back to the splitting unit;

 The third end of the outdoor unit is configured to return the second refrigerant flowing out from the third end of the indoor unit to the branching unit.

 Preferably, when the multi-connected air conditioning system is in a cooling condition,

 As the first heat exchanger of the condenser, the heat is discharged into the atmosphere; the indoor return air enters the third air chamber from the second return air passage and exchanges heat with the refrigerant in the fourth heat exchanger as the evaporator, and the return air The heat is taken away by the low-temperature refrigerant in the evaporator, and the air is cooled and sent to the room by the second air supply passage;

 The indoor unit controls the second heat exchanger and the third heat exchanger to perform cyclic switching in the first cycle and the second cycle:

 In the first cycle, the indoor unit controls the second heat exchanger as the evaporator and the third heat exchanger serves as the condenser, and the second refrigerant input from the first end of the outdoor unit to the first end of the indoor unit flows through the first The second heat exchanger and the third heat exchanger flow out from the third end of the indoor unit, enter the third end of the outdoor unit, and return to the splitting unit through the third end of the outdoor unit;

The outdoor fresh air enters the first air chamber from the fresh air passage, and exchanges heat and mass with the second heat exchanger. The high temperature and high humidity fresh air is cooled by the second heat exchanger, and the water vapor in the fresh air is used by the second heat exchanger. The absorbent material on the fins is absorbed, and the fresh air is cooled and dehumidified and sent into the room by the first air supply passage; The indoor return air enters the second air chamber from the first return air passage, exchanges heat and mass transfer with the third heat exchanger, and the low temperature and low humidity return air absorbs the heat of the third heat exchanger, and the cooling capacity in the return air is Recycling, and the return air carries away the moisture absorbed by the moisture absorbing material on the fins of the third heat exchanger in the second cycle, and the heated humidified air is discharged into the atmosphere via the exhaust passage;

 In the second cycle, the second heat exchanger is controlled as a condenser and the third heat exchanger is used as an evaporator, and the second refrigerant input from the first end of the outdoor unit to the first end of the indoor unit sequentially flows through the third exchange The heat exchanger and the second heat exchanger flow out from the third end of the indoor unit, enter the third end of the outdoor unit, and return to the flow dividing unit through the third end of the outdoor unit;

 The fresh air enters the second air chamber from the fresh air passage, and exchanges heat and mass with the third heat exchanger. The high temperature and high humidity fresh air is cooled by the third heat exchanger, and the water vapor in the fresh air is replaced by the third heat exchanger. The moisture absorption material on the fin is absorbed, and the fresh air is cooled and dehumidified, passes through the second air chamber, and finally is sent into the room by the first air supply passage;

 The indoor return air enters the first air chamber from the first return air passage, exchanges heat and mass transfer with the second heat exchanger, and the low temperature and low humidity return air absorbs the heat of the second heat exchanger, and the cooling capacity in the return air is Recycling, and the return air takes away the moisture absorbed by the moisture absorbing material on the fins of the second heat exchanger in the first cycle, and the heated humidified air is discharged into the atmosphere via the exhaust passage, at a time set in the second cycle When it is time, the trigger enters the first cycle, and thus cycles;

 When the multi-line system is in heating,

 As the first heat exchanger of the evaporator, heat is absorbed from the atmosphere; the indoor return air enters the third air chamber from the second return air passage and exchanges heat with the fourth heat exchanger as a condenser, and the condenser discharges heat In the return air, after the air is heated, it is sent into the room by the second air supply passage;

 The indoor unit controls the second heat exchanger and the third heat exchanger to perform the cyclic switching in the third cycle and the fourth cycle:

 In the third cycle, the second heat exchanger is controlled as the evaporator and the third heat exchanger is used as the condenser, and the second refrigerant flowing out from the first end of the outdoor unit flows through the first end of the indoor unit. Passing through the third end of the indoor unit through the third heat exchanger and the second heat exchanger, and flowing into the third end of the outdoor unit, and returning to the flow dividing unit;

 The fresh air enters the second air chamber from the fresh air passage, and exchanges heat and mass with the third heat exchanger. The low temperature and low humidity fresh air is heated by the heat of the third heat exchanger, and the dry fresh air absorbs the wings of the third heat exchanger. The moisture absorbed by the moisture absorbing material on the sheet during the fourth cycle, the fresh air is heated and humidified, and then sent into the room through the first air supply passage;

The indoor return air enters the first air chamber from the first return air passage, and performs heat and mass transfer with the second heat exchanger. Exchanging, the high temperature and high humidity return air is cooled by the low temperature refrigerant in the second heat exchanger, the heat in the return air is recovered, and the water vapor in the return air is absorbed by the moisture absorbing material on the fins of the second heat exchanger, The air cooled and dehumidified is discharged into the atmosphere via the exhaust passage;

 In the fourth cycle, the second heat exchanger is controlled as a condenser and the third heat exchanger is used as an evaporator, and the second refrigerant flowing out from the first end of the outdoor unit flows through the first end of the indoor unit in sequence. The second heat exchanger and the third heat exchanger flow out through the third end of the indoor unit, and flow into the third end of the outdoor unit, and return to the flow dividing unit;

 The outdoor fresh air enters the first air chamber from the fresh air passage, and exchanges heat and mass with the second heat exchanger. The low temperature and low humidity fresh air is heated by the heat of the second heat exchanger, and the dry fresh air absorbs the second heat exchanger. The moisture absorbed by the moisture-absorbing material on the fin in the third cycle, the fresh air is heated and humidified, and then sent into the room through the first air supply passage;

 The indoor return air enters the second air chamber from the first return air passage, and performs heat and mass transfer exchange with the third heat exchanger. The high temperature and high humidity return air is cooled by the low temperature refrigerant in the third heat exchanger, and the return air is in the return air. The heat is recovered, and the water vapor in the return air is absorbed by the moisture absorbing material on the fins of the third heat exchanger, and the air cooled and dehumidified is discharged into the atmosphere through the exhaust passage, and the time set in the fourth cycle is timed. , trigger into the third cycle, and so on.

 Preferably, the shunting 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 is respectively connected with the switching unit and the Connected at one end, the input end of the gas-liquid separator is connected to the output end of the switching unit and the third end of the outdoor unit, and the output end of the gas-liquid separator is connected to the input end of the compressor.

 Preferably, the switching unit is a first four-way commutation wide, the first end of the first four-way commutation is connected to the one-way wide output end, and the first four-way reversing the second end and the second end The input end of a heat exchanger is connected, the third end of the first four-way commutation is connected to the input end of the gas-liquid separator, and the fourth end of the first four-way reversing is connected to the second end of the outdoor unit.

 Preferably, the first end of the outdoor unit is the first cut-off width, the second end of the outdoor unit is the second cut-off width, the third end of the outdoor unit is the third cut-off wide, and the fourth end of the outdoor unit is the first The four deadlines are wide.

 Preferably, the outdoor unit further comprises: an input end connected to the output end of the first heat exchanger, and a first electronic expansion width connected to the output end of the fourth cut-off wide end.

Preferably, the output end of the compressor is connected to the unidirectional wide input end, and the unidirectional wide output end is respectively connected with the first four-way widened first end and the first cut-off wide input end, the first four The second end of the first commutator is connected to the input end of the first heat exchanger, and the output end of the first heat exchanger is connected to the input end of the first electronic expansion, the first electronically expanded output end and the fourth cutoff Wide input Connected, the fourth cut-off output end is connected to the indoor unit, and the third end of the first four-way reversing width is connected to the input end of the gas-liquid separator and the third cut-off wide input end respectively, the gas-liquid separator The output end is connected to the input end of the compressor, and the fourth end of the first four-way reversing width is connected with the second cut-off wide input end, and the output ends of the first cut-off width, the second cut-off width and the third cut-off width are respectively The indoor unit is connected.

 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.

 Preferably, the first air chamber unit further includes: a first wind width, a second wind width, a fifth wind width, a sixth wind width, a first air duct, and a third air duct, wherein

 A new air passage is opened at one end of the inner wall of the first air chamber, and a first air supply passage is opened at the other end of the inner wall, and a first air valve and a first air valve are disposed at a side of the inner wall of the fresh air passage leading to the first air supply passage and close to the fresh air passage. a second damper, wherein the first air supply passage leads to the fresh air passage and is adjacent to the other end of the inner wall of the first air supply passage, and has a fifth wind width and a sixth wind width; and in the first wind chamber, a second change is set Heater

 a first duct connecting the second wind gap to the second air chamber unit, and a fifth wind connecting to the second air chamber unit at a junction of the first air chamber and the second air chamber Three ducts.

 Preferably, the second air chamber unit further comprises: a third wind width, a fourth wind width, a seventh wind width, an eighth wind width, a second air duct, a fourth air duct, and a second four-way commutation Broad and the second electronic expansion is wide, among them,

 a first return air passage is opened at one end of the inner wall of the second air chamber and the first air chamber, and an exhaust air passage is opened at the other end of the inner air passage, and the first return air passage leads to the exhaust air passage and is adjacent to the first return air passage One end of the inner wall is provided with a third wind width and a fourth wind width, and the seventh wind width and the eighth wind width are disposed at the other end of the inner wall of the exhaust passage leading to the first return air passage and close to the exhaust passage; In the second wind chamber, a second four-way reversing width, a second electronic expansion wide, and a third heat exchanger are disposed; at a junction of the first air chamber and the second air chamber, a fourth wind width connection is provided a second duct to the first plenum, and a fourth duct connected to the first plenum.

 Preferably, the third air chamber unit further comprises: a third electronic expansion,

 The air between the third air chamber and the second air chamber is not permeable;

 a second return air passage is opened at one end of the inner wall of the third air chamber and the first air chamber, and a second air supply passage is opened at the other end of the inner wall, and a third electronic expansion wide and a fourth change are arranged in the third wind chamber. Heater

The first cut-off wide output is connected to the second end of the second four-way commutation, and the second four-way reversing The broad first end is connected to one end of the second heat exchanger, the other end of the second heat exchanger is connected to the second electronically expanded wide end, and the other end of the second electronically expanded wide is connected to one end of the third heat exchanger The other end of the third heat exchanger is connected to the third end of the second four-way reversing width, and the fourth end of the second four-way reversing width is connected with the output end of the third cut-off width, and the second cut-out wide output The end 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, and the other end of the third electronic expansion is connected to the output end of the fourth cut-off width.

 Preferably, the first heat exchanger, the second heat exchanger, the third heat exchanger and the fourth heat exchanger are aluminum foil finned copper tube heat exchangers or aluminum finned microchannel heat exchangers, The fins of the second heat exchanger and the third heat exchanger are coated with a moisture absorbing material.

 Preferably, the refrigerant is discharged from the output end of the compressor into a one-way wide, and the high-pressure refrigerant gas which is unidirectionally wide is divided into a first refrigerant and a second refrigerant, and the first refrigerant enters The first four-way reversing the first end of the wide, the second refrigerant enters the first cut-off width, and is output to the indoor unit via the first cut-off width;

 When the multi-connected air conditioning system is in a cooling condition, the first end of the first four-way commutation is connected to the second end, and the third end is connected to the fourth end, and the first liquid supply of the evaporator is adjusted according to a preset procedure. The electronic expansion is wide open, the second electronic expansion is wide, and the third electronic expansion is wide to regulate the flow of the refrigerant; the first heat exchanger acts as a condenser and the fourth heat exchanger acts as an evaporator, and the first refrigerant is a four-way reversing wide second end, sequentially entering the first heat exchanger, the first electronic expansion wide, the fourth cut wide, the third electronic expansion wide, the fourth heat exchanger and the second cut-off width, and then flowing back to The first four-way reversing the wide fourth end, entering the gas-liquid separator via the first four-way commutating third end, and finally entering the compressor from the compressor input end;

 The second refrigerant enters the second four-way commutating second end from the first cut-off output end; in the first cycle, the second heat exchanger acts as an evaporator and the third heat exchanger acts as a condenser The first end of the second four-way commutation is in communication with the fourth end, and the second end is in communication with the third end, and the second refrigerant is commutated from the second four-way to the second end of the second, through the second four-way Reversing the wide third end, sequentially entering the third heat exchanger, the second electronic expansion wide, the second heat exchanger, the second four-way commutating first end, the fourth end, and the third cut-off width, and finally Returning to the gas-liquid separator, entering the compressor from the compressor input;

In the second cycle, the second heat exchanger acts as a condenser and the third heat exchanger acts as an evaporator, and the first end of the second four-way commutation is in communication with the second end and the third end is in communication with the fourth end. The second refrigerant is switched from the second four-way to the second, first end of the wide end, and sequentially enters the second heat exchanger, the second electronic expansion wide, the third heat exchanger, and the second four-way commutation Third, fourth, and third Stop wide, return to the gas-liquid separator, and finally enter the compressor from the compressor input;

 When the multi-line system is in the heating condition, the first end of the first four-way reversing is connected to the fourth end, the second end is connected to the third end, the third electronic expansion is wide open, and the first electronic expansion is wide. And the second electronic expansion width respectively acts as a throttling;

 The first heat exchanger acts as an evaporator and the fourth heat exchanger acts as a condenser. The first refrigerant is commutated to the first end and the fourth end of the first through the first four-way, and sequentially enters the second cut-off width and the fourth change. The heat exchanger, the third electronic expansion wide, the fourth cut-off width, the first electronic expansion width and the first heat exchanger, and then reflowed to the second end of the first four-way reversing width, and the first four-way reversing The third end enters the gas-liquid separator, and finally enters the compressor from the input end of the compressor;

 The second refrigerant enters the second four-way commutating second end from the first cut-off output end; in the third cycle, the second heat exchanger acts as an evaporator and the third heat exchanger acts as a condenser The first end of the second four-way commutation is in communication with the fourth end, and the second end is in communication with the third end, and the second refrigerant is commutated from the second four-way to the second end of the second, through the second four-way Reversing the wide third end, sequentially entering the third heat exchanger, the second electronic expansion wide, the second heat exchanger, the second four-way commutating first end, the fourth end, and the third cut-off width, and finally Returning to the gas-liquid separator, and finally entering the compressor from the compressor input;

 In the fourth cycle, the second heat exchanger acts as a condenser and the third heat exchanger acts as an evaporator, and the first end of the second four-way commutation is in communication with the second end and the third end is in communication with the fourth end. The second refrigerant is switched from the second four-way to the second, first end of the wide end, and sequentially enters the second heat exchanger, the second electronic expansion wide, the third heat exchanger, and the second four-way commutation The third end, the fourth end and the third cut-off are wide, and then return to the gas-liquid separator, and finally enter the compressor from the compressor input end.

 Preferably, in the first cycle, the first wind width, the third wind width, the sixth wind width and the eighth wind width open, the second wind width, the fourth wind width, the fifth wind width and the seventh wind Widely closed

 The outdoor fresh air enters the first air chamber through the first wind through the fresh air passage, and exchanges heat and mass with the second heat exchanger. The high temperature and high humidity fresh air is cooled by the second heat exchanger, and the water vapor in the fresh air is The moisture absorbing material on the fins of the second heat exchanger is absorbed, and the fresh air is cooled and dehumidified, and then passed through the sixth wind width, and is sent into the room by the first air supply passage;

 The indoor return air passes through the first return air passage, enters the second air chamber through the third wind, exchanges heat and mass with the third heat exchanger, and the low temperature and low humidity return air absorbs the heat of the third heat exchanger, and returns The cold volume in the wind is recovered, and the return air takes away the moisture absorbed by the moisture absorbing material on the fins of the third heat exchanger in the second cycle, and the heated humidified air is discharged through the exhaust passage through the eighth wind width. Atmosphere

After a preset time, trigger to control the second four-way reversing wide commutation, enter the second loop The ring cycle, the first wind width, the third wind width, the sixth wind width and the eighth wind width are closed, the second wind width, the fourth wind width, the fifth wind width and the seventh wind width open;

 The fresh air enters the first air duct through the second air valve through the second air valve, and then enters the second air chamber to exchange heat and mass with the third heat exchanger, and the fresh air with high temperature and high humidity is cooled and cooled by the third heat exchanger, and The water vapor in the fresh air is absorbed by the moisture absorbing material on the fins of the third heat exchanger, and the fresh air is cooled and dehumidified, passes through the third air duct, passes through the fifth wind width, and finally is sent into the room through the first air supply passage;

 The indoor return air enters the second air duct from the first air return passage through the fourth wind, and then enters the first air chamber, and performs heat and mass transfer exchange with the second heat exchanger, and the second heat exchange of low temperature and low humidity return air absorption. The heat of the device is recovered, and the amount of cold in the return air is recovered, and the return air carries away the moisture absorbed by the moisture absorbing material on the fins of the second heat exchanger in the first cycle, and the heated humidified air passes through the fourth air duct. Then, the seventh wind is discharged into the atmosphere by the exhaust passage, and when the time set by the second cycle is reached, the trigger enters the first cycle, and the cycle is repeated.

 Preferably, in the third cycle, the first wind width, the third wind width, the sixth wind width and the eighth wind width are closed, the second wind width, the fourth wind width, the fifth wind width and the seventh wind Wide open

 The fresh air enters the first air duct through the second air valve through the second air valve, and then enters the second air chamber to exchange heat and mass with the third heat exchanger, and the fresh air with low temperature and low humidity is heated by the heat of the third heat exchanger. The dry fresh air absorbs the moisture absorbed by the moisture absorbing material on the fins of the third heat exchanger in the fourth cycle, the fresh air is heated and humidified, passes through the third air duct, passes through the fifth wind width, and finally passes the first air supply. The channel is sent indoors;

 The indoor return air enters the second air duct from the first air return passage through the fourth wind width, and then enters the first air chamber, and exchanges heat and mass with the second heat exchanger, and the return air of high temperature and high humidity is replaced by the second air. The low temperature refrigerant in the heater cools down, the heat in the return air is recovered, and the water vapor in the return air is absorbed by the moisture absorbing material on the fins of the second heat exchanger, and the air cooled and dehumidified passes through the fourth air duct, and then The seventh wind is discharged into the atmosphere by the exhaust passage;

 After the preset time, the second four-way is changed to the wide commutation, and the trigger enters the fourth cycle. The first wind width, the third wind width, the sixth wind width and the eighth wind width open, the second wind is wide, The fourth wind width, the fifth wind width and the seventh wind width are closed;

 The outdoor fresh air enters the first air chamber through the first wind through the fresh air passage, and exchanges heat and mass with the second heat exchanger. The fresh air with low temperature and low humidity is heated by the heat of the second heat exchanger, and the fresh air absorption is dry. The moisture absorbed by the moisture absorbing material on the fins of the two heat exchangers is absorbed and humidified in the previous cycle, and the fresh air is heated and humidified, and then passed through the sixth air vent, and is sent into the room by the first air supply passage;

The indoor return air enters the second air chamber through the first air return passage through the third air passage, and enters the third heat exchanger Heat and mass transfer, high temperature and high humidity return air is cooled by the low temperature refrigerant in the third heat exchanger, the heat in the return air is recovered, and the water vapor in the return air is on the fins of the third heat exchanger. The moisture absorbing material absorbs, and the air cooled and dehumidified is discharged into the atmosphere through the exhaust air passage through the eighth wind width, and is triggered to enter the third circulation cycle when the time set by the fourth cycle is reached, and thus circulates.

 Preferably, the outdoor unit further includes:

 a heat exchanger, wherein the first end of the heat exchanger is respectively connected to the input end of the gas-liquid separator and the third end of the first four-way reversing, the second end of the heat exchanger and the output end of the first electronic expansion Connected, the third end of the heat exchanger is connected to the fourth cut-off input, and the third end of the heat exchanger is connected to the third cut-off input.

 Preferably, the first air chamber unit further includes: a first wind width, a second wind width, a fifth wind width, a sixth wind width, a first air duct, and a third air duct, wherein

 A new air passage is opened at one end of the inner wall of the first air chamber, and a first air supply passage is opened at the other end of the inner wall, and a first air valve and a first air valve are disposed at a side of the inner wall of the fresh air passage leading to the first air supply passage and close to the fresh air passage. a second damper, wherein the first air supply passage leads to the fresh air passage and is adjacent to the other end of the inner wall of the first air supply passage, and has a fifth wind width and a sixth wind width; and in the first wind chamber, a second change is set Heater

 a first duct connecting the first wind gap to the second air chamber unit, and a first wind connecting the second air chamber unit to the second air chamber unit at a junction of the first air chamber and the second air chamber The third air duct unit further includes: a third wind width, a fourth wind width, a seventh wind width, an eighth wind width, a second air duct, a fourth air duct, and a second four-way commutation Broad and the second electronic expansion is wide, among them,

 a first return air passage is opened at one end of the inner wall of the second air chamber and the first air chamber, and an exhaust air passage is opened at the other end of the inner air passage, and the first return air passage leads to the exhaust air passage and is adjacent to the first return air passage One end of the inner wall is provided with a third wind width and a fourth wind width, and the seventh wind width and the eighth wind width are disposed at the other end of the inner wall of the exhaust passage leading to the first return air passage and close to the exhaust passage; In the second wind chamber, a second four-way reversing width, a second electronic expansion wide, and a third heat exchanger are disposed; at a junction of the first wind chamber and the second air chamber, a third wind width connection is provided a second duct to the first plenum, and a fourth duct connected to the first plenum.

 A method of controlling temperature and humidity in a multi-connected air conditioning system, the method comprising:

The first refrigerant input from the switching unit of the outdoor unit and the second refrigerant input from the third end of the outdoor unit are merged, compressed by the branching unit, and then shunted to output the first refrigerant and the second refrigerant respectively. Agent Passing the second refrigerant outputted by the flow dividing unit to the first end of the indoor unit through the first end of the outdoor unit, sequentially flowing through the second condenser of the indoor unit and the second evaporator, and from the third of the indoor unit The end flows out and flows back to the diverting unit through the third end of the outdoor unit;

 The first refrigerant outputted by the flow dividing unit is switched, sequentially flows through the first condenser, the first evaporator, and enters the flow dividing unit.

 Preferably, the switching of the first refrigerant outputted by the splitting unit to the first condenser, the first evaporator, and the splitting unit comprises:

 When the multi-connected air conditioning system is in a cooling condition, the first heat exchanger in the outdoor unit is controlled as the first evaporator, and the fourth heat exchanger in the indoor unit is used as the first evaporator;

 The first refrigerant outputted by the flow dividing unit is switched and flows through the first heat exchanger, and is output to the fourth end of the indoor unit through the fourth end of the outdoor unit, and passes through the fourth heat exchanger of the indoor unit, and is The second end of the machine returns to the second end of the outdoor unit, and enters the diverting unit through the second end of the outdoor unit;

 When the multi-connected air conditioning system is in a heating condition, the first heat exchanger in the outdoor unit is controlled as the first evaporator, and the fourth heat exchanger in the indoor unit is used as the first condenser;

 Switching the first refrigerant to the second end of the indoor unit via the second end, flowing through the fourth heat exchanger through the second end of the indoor unit, flowing out through the fourth end of the indoor unit, and flowing into the outdoor unit The four ends pass through the first heat exchanger through the fourth end of the outdoor unit, and then flow back to the splitting unit.

 Preferably, the outdoor unit comprises: a compressor, a unidirectional wide, a first four-way commutation, a first heat exchanger, a first electronic expansion, a gas-liquid separator, a first cut-off width, a second cut-off width, The third cut-off width and the fourth cut-off width;

 The indoor unit includes: a fresh air passage, a first return air passage, a second return air passage, a first air supply passage, an exhaust air passage, a second air supply passage, a first air chamber, a second air chamber, a third air chamber, The first wind width, the second wind width, the third wind width, the fourth wind width, the fifth wind width, the sixth wind width, the seventh wind width, the eighth wind width, the first air duct, the second air duct, a third air duct, a fourth air duct, a second four-way commutation wide, a second heat exchanger, a second electronic expansion wide, a third heat exchanger, a third electronic expansion wide, and a fourth heat exchanger;

 The refrigerant is discharged from the output end of the compressor into a one-way wide, and the high-pressure refrigerant gas which is unidirectionally wide is divided into a first refrigerant and a second refrigerant, and the first refrigerant enters the switching unit. The first four-way reversing the first end of the wide, the second refrigerant enters the first cut-off width of the first end of the outdoor unit, and is output to the indoor unit via the first cut-off;

When the multi-connected air conditioning system is in a cooling condition, the first end of the first four-way commutation is connected to the second end, and the third end is connected to the fourth end, and the first liquid supply of the evaporator is adjusted according to a preset procedure. Electricity The sub-expansion is wide open, the second electronic expansion is wide, and the third electronic expansion is wide to regulate the flow rate of the refrigerant; the first heat exchanger acts as a condenser and the fourth heat exchanger acts as an evaporator, and the first refrigerant is a four-way reversing wide second end, sequentially entering the first heat exchanger, the first electronic expansion wide, the fourth cut wide, the third electronic expansion wide, the fourth heat exchanger and the second cut-off width, and then flowing back to The first four-way reversing the wide fourth end, entering the gas-liquid separator via the first four-way commutating third end, and finally entering the compressor from the compressor input end;

 The second refrigerant enters the second four-way commutating second end from the first cut-off output end; in the first cycle, the second heat exchanger acts as an evaporator and the third heat exchanger acts as a condenser The first wide, the third wide, the sixth wide and the eighth wide open, the second wide, the fourth wide, the fifth wide and the seventh wide open;

 The first end of the second four-way commutation is in communication with the fourth end, and the second end is in communication with the third end, and the second refrigerant is commutated from the second four-way to the second end of the second, through the second four-way Reversing the wide third end, sequentially entering the third heat exchanger, the second electronic expansion wide, the second heat exchanger, the second four-way commutating first end, the fourth end, and the third cut-off width, and finally Returning to the gas-liquid separator, entering the compressor from the compressor input;

 In the second cycle, the second heat exchanger acts as a condenser and the third heat exchanger acts as an evaporator, and the first wind width, the third wind width, the sixth wind width, and the eighth wind width are closed, and the second wind width is wide. The fourth wind width, the fifth wind width and the seventh wind width open;

 The first end of the second four-way reversing direction is in communication with the second end, and the third end is in communication with the fourth end, and the second refrigerant is switched from the second four-way to the second end of the second end, the first end, in turn Entering the second heat exchanger, the second electronic expansion wide, the third heat exchanger, the third end of the second four-way commutation, the fourth end, and the third cut-off width, and then returning to the gas-liquid separator, and finally The compressor input enters the compressor;

 When the multi-line system is in the heating condition, the first end of the first four-way reversing is connected to the fourth end, the second end is connected to the third end, the third electronic expansion is wide open, and the first electronic expansion is wide. And the second electronic expansion width respectively acts as a throttling;

 The first heat exchanger acts as an evaporator and the fourth heat exchanger acts as a condenser. The first refrigerant is commutated to the first end and the fourth end of the first through the first four-way, and sequentially enters the second cut-off width and the fourth change. The heat exchanger, the third electronic expansion wide, the fourth cut-off width, the first electronic expansion width and the first heat exchanger, and then reflowed to the second end of the first four-way reversing width, and the first four-way reversing The third end enters the gas-liquid separator, and finally enters the compressor from the input end of the compressor;

The second refrigerant enters the second four-way commutating second end from the first cut-off output end; in the third cycle, the second heat exchanger acts as an evaporator and the third heat exchanger acts as a condenser The first wind width, the third wind width, the sixth wind width and the eighth wind width are closed, the second wind width, the fourth wind width, the fifth wind width and the seventh wind width open;

 The first end of the second four-way commutation is in communication with the fourth end, and the second end is in communication with the third end, and the second refrigerant is commutated from the second four-way to the second end of the second, through the second four-way Reversing the wide third end, sequentially entering the third heat exchanger, the second electronic expansion wide, the second heat exchanger, the second four-way commutating first end, the fourth end, and the third cut-off width, and finally Returning to the gas-liquid separator, and finally entering the compressor from the compressor input;

 In the fourth cycle, the second heat exchanger acts as a condenser and the third heat exchanger acts as an evaporator, and the first wind width, the third wind width, the sixth wind width, and the eighth wind width open, the second wind is wide, The fourth wind width, the fifth wind width and the seventh wind width are closed;

 The first end of the second four-way reversing direction is in communication with the second end, and the third end is in communication with the fourth end, and the second refrigerant is switched from the second four-way to the second end of the wide end, the first end, in turn Entering the second heat exchanger, the second electronic expansion wide, the third heat exchanger, the third end of the second four-way commutation, the fourth end, and the third cut-off width, and then returning to the gas-liquid separator, and finally The compressor input enters the compressor.

 The method of the present invention provides a method for controlling temperature and humidity in a multi-connected air-conditioning system and a multi-connected air-conditioning system, and inputting the first refrigerant input by the switching unit of the outdoor unit and the third end of the outdoor unit. The second refrigerant 'C stream, after being compressed by the splitting unit, is split, and outputs the first refrigerant and the second refrigerant respectively; and the second refrigerant output from the split unit passes through the first of the outdoor unit The end is output to the first end of the indoor unit, sequentially flows through the second condenser of the indoor unit and the second evaporator, and flows out from the third end of the indoor unit, and flows back to the split unit through the third end of the outdoor unit; The first refrigerant outputted by the splitting unit is switched, sequentially flows through the first condenser, the first evaporator, and enters the splitting unit. In this way, the indoor unit is controlled by the condenser and the evaporator, and the temperature and humidity can be independently controlled, and the structure is compact and the equipment integration is high. Moreover, the evaporation of the multi-connected air-conditioning system is achieved by recovering the cooling capacity and heat of the return air. The higher temperature and lower condensing temperature make the multi-connected air conditioning system operate at a higher energy efficiency ratio and improve the energy efficiency ratio of the multi-connected air conditioning system. DRAWINGS

 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.

FIG. 1 is a schematic structural diagram of a multi-connected air conditioning system according to an embodiment of the present invention. 2 is a schematic structural view of an outdoor unit according to another embodiment of the present invention.

 FIG. 3 is a schematic structural view of an indoor unit according to another embodiment of the present invention.

 4 is a schematic flow chart of a method for controlling temperature and humidity in a multi-connected air conditioning system according to an embodiment of the present invention. detailed description

 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.

 The existing temperature and humidity control method by the cooling and dehumidifying means and the wheel dehumidification system is not suitable for the multi-connected air conditioning system because of the low energy efficiency ratio and large volume; and the multi-connected air conditioning system adopts the indoor air supply end and the total heat exchanger. The application, in order to separately control the indoor temperature and humidity, makes the user use cost high, the indoor equipment is not compact, the installation and maintenance are inconvenient, and the energy efficiency of the multi-connected air conditioning system is relatively low.

 As the country pays more and more attention to energy conservation and emission reduction, users are paying more and more attention to the energy efficiency ratio index reflecting the comprehensive performance of multi-connected air conditioning systems, that is, the output and input power of multi-connected air conditioning systems under rated conditions and specified conditions. The ratio, the greater the energy efficiency ratio, indicates that the multi-connected air conditioning system is more energy efficient. However, the existing method of controlling the auxiliary electric heating only controls the opening and closing of the auxiliary electric heating according to some temperature conditions, and the energy efficiency ratio of the auxiliary electric heating is generally much smaller than the energy efficiency ratio of the compressor, and the heating provided by the compressor is not considered. The amount and the energy efficiency ratio of the system, the energy efficiency ratio and the level that can be achieved by the air conditioner have a large gap, which makes the auxiliary electric heating run for a long time, resulting in waste of energy and low energy efficiency.

 In the embodiment of the present invention, considering the recycling of the cooling air or heat in the multi-connected air-conditioning system, a multi-connected air-conditioning system with independent control of temperature and humidity and compact structure is proposed, and the multi-connected air-conditioning system recovers the amount of return air or The heat, the fresh air ventilation, the cold recovery and the temperature and humidity independent adjustment control are concentrated in one indoor unit, so as to meet the high standard and individualized requirements of the user, so that the multi-connected air conditioning system can utilize the cold air or heat of the return air. Energy, ensuring high energy efficiency ratio operation, thus meeting the functions of fresh air ventilation, return air cooling, cooling and dehumidification in summer; and meeting the functions of fresh air ventilation, return air heat recovery, heating and humidification in winter, so as to use back Wind energy, while ensuring efficient operation of the multi-connected air conditioning system, achieves independent control of indoor fresh air ventilation and temperature and humidity.

FIG. 1 is a schematic structural diagram of a multi-connected air conditioning system according to an embodiment of the present invention. Referring to FIG. 1, the multi-connected air conditioning system is independently controlled by temperature and humidity, and includes: an outdoor unit 01 and an indoor unit 02, wherein, the room The external machine 01 is one or more, and the indoor unit 02 is one or more.

 The outdoor unit 01 includes: a control unit, a splitting unit, a switching unit, a first heat exchanger, a first end, a second end, a third end, and a fourth end, wherein

 a control unit, configured to control the first heat exchanger as a condenser, the fourth heat exchanger 37 in the indoor unit 02 as an evaporator when the multi-connected air conditioning system is in a cooling condition; and the heating device in the multi-connected air conditioning system In other words, the first heat exchanger 4 is controlled as an evaporator and a fourth heat exchanger 37 as a cold backup;

 a splitting unit, configured to merge the first refrigerant input by the switching unit and the second refrigerant input by the third end, and after being compressed, perform splitting, respectively outputting the first refrigerant and the second refrigerant;

 a first end, configured to output the second refrigerant outputted by the flow dividing unit to the first end of the external indoor unit;

 a switching unit, configured to: when the multi-connected air conditioning system is in a cooling condition, switch the first refrigerant outputted by the flow dividing unit to flow through the first heat exchanger, and output to the fourth end of the indoor unit 02 through the fourth end And passing through the fourth heat exchanger 37 of the indoor unit 02, returning from the second end of the indoor unit to the second end of the outdoor unit, and entering the splitting unit through the second end of the outdoor unit;

 When the multi-connected air conditioning system is in a heating condition, the first refrigerant is switched to the second end of the indoor unit via the second end, and flows through the fourth heat exchanger 37 through the second end of the indoor unit through the indoor The fourth end of the machine flows out and flows into the fourth end of the outdoor unit, flows through the first heat exchanger through the fourth end of the outdoor unit, and then flows back to the splitting unit;

 a third end, configured to return a second refrigerant flowing out from the third end of the indoor unit 02 to the flow dividing unit;

 The indoor unit 02 includes: a first air chamber unit, a second air chamber unit, and a third air chamber unit, wherein

 The first air chamber unit is provided with a second heat exchanger 33, a fresh air passage 11, a first air supply passage 14, and a first air chamber 17, and the fresh air passage 11 and the first air supply passage 14 are respectively located in the first air chamber unit. a second heat exchanger 35, a first return air passage 12, an exhaust air passage 15, a second air chamber 18, a first end and a third end, a first return air passage 12, and The exhaust passages 15 are respectively located at two sides of the second air chamber unit;

 When the multi-line system is in the cooling condition, the indoor unit 02 controls the second heat exchanger 33 and the third heat exchanger 35 to perform the cyclic switching in the first cycle and the second cycle;

In the first cycle, the indoor unit 02 controls the second heat exchanger 33 as an evaporator and the third exchange The heat exchanger 35 serves as a condenser, and the second refrigerant that is input from the first end of the outdoor unit to the first end of the indoor unit sequentially flows through the second heat exchanger 33 and the third heat exchanger 35, and the third refrigerant from the indoor unit 02 The end flows out, enters the third end of the outdoor unit, and flows back to the diverter unit through the third end of the outdoor unit;

 The outdoor fresh air enters the first air chamber 17 from the fresh air passage 11, exchanges heat and mass with the second heat exchanger 33, and the fresh air with high temperature and high humidity is cooled by the second heat exchanger 33, and the water vapor in the fresh air is The moisture absorbing material on the fins of the two heat exchangers 33 is absorbed, and the fresh air is cooled and dehumidified and sent into the room by the first air supply passage 14;

 The indoor return air enters the second air chamber 18 from the first return air passage 12, and performs heat and mass transfer exchange with the third heat exchanger 35, and the low temperature and low humidity return air absorbs the heat of the third heat exchanger 35, and returns to the wind. The amount of cold is recovered, and the return air takes away the moisture absorbed by the moisture absorbing material on the fins of the third heat exchanger 35 in the second cycle, so that the moisture in the part of the moisture absorbing material is sucked away, thereby realizing regeneration. The heated humidified air is discharged into the atmosphere via the exhaust passage 15;

 In the second cycle, the second heat exchanger 33 is controlled as a condenser and the third heat exchanger 35 is used as an evaporator, and the second refrigerant input from the first end of the outdoor unit to the first end of the indoor unit flows through the first The third heat exchanger 35 and the second heat exchanger 33 flow out from the third end of the indoor unit, enter the third end of the outdoor unit, and return to the branching unit through the third end of the outdoor unit;

 The fresh air enters the second air chamber 18 from the fresh air passage 11 and exchanges heat and mass with the third heat exchanger 35. The high temperature and high humidity fresh air is cooled by the third heat exchanger 35, and the water vapor in the fresh air is third. The moisture absorbing material on the fins of the heat exchanger 35 is absorbed, and the fresh air is cooled and dehumidified, passes through the second air chamber 18, and finally sent into the room through the first air supply passage 14;

 The indoor return air enters the first air chamber 17 from the first return air passage 12, performs heat and mass transfer exchange with the second heat exchanger 33, and the low temperature and low humidity return air absorbs the heat of the second heat exchanger 33, and returns to the wind. The cold amount is recovered, and the return air carries away the moisture absorbed by the moisture absorbing material on the fins of the second heat exchanger 33 in the first cycle, so that the partially absorbing material is regenerated, and the heated humidified air passes through the exhaust passage 15 Discharge into the atmosphere, when the time set by the second cycle is reached, the trigger enters the first cycle, and thus cycles, thereby achieving independent control of cooling and dehumidification;

 When the multi-line system is in the heating condition, the indoor unit 02 controls the second heat exchanger 33 and the third heat exchanger 35 to perform the cyclic switching in the third cycle period and the fourth cycle period;

In the third cycle, the second heat exchanger 33 is controlled as an evaporator and the third heat exchanger 35 is used as a condenser, and the second refrigerant flowing out from the first end of the outdoor unit is passed through the first end of the indoor unit. Flowing through the third heat exchanger 35 and the second heat exchanger 33 in sequence, flowing out through the third end of the indoor unit, and flowing into the third end of the outdoor unit, and flowing back to the flow dividing unit; The fresh air enters the second air chamber 18 from the fresh air passage 11 and exchanges heat and mass with the third heat exchanger 35. The fresh air of low temperature and low humidity is heated by the heat of the third heat exchanger 35, and the fresh air of the fresh air is absorbed for the third time. The moisture absorbed by the moisture absorbing material on the fins of the heat exchanger 35 in the fourth cycle is such that the moisture absorbing material is dried and regenerated, and the fresh air is heated and humidified, and then sent to the room through the first air supply passage 14;

 The indoor return air enters the first air chamber 17 from the first return air passage 12, and performs heat and mass transfer exchange with the second heat exchanger 33, and the high temperature and high humidity return air is cooled by the low temperature refrigerant in the second heat exchanger 33. The heat in the return air is recovered, and the water vapor in the return air is absorbed by the moisture absorbing material on the fins of the second heat exchanger 33, and the air cooled and dehumidified is discharged into the atmosphere via the exhaust passage 15;

 In the fourth cycle, the second heat exchanger 33 is controlled as a condenser and the third heat exchanger 35 is used as an evaporator, and the second refrigerant flowing out from the first end of the outdoor unit is sequentially passed through the first end of the indoor unit. Flowing through the second heat exchanger 33, the third heat exchanger 35, flowing out through the third end of the indoor unit, and flowing into the third end of the outdoor unit, and flowing back to the flow dividing unit;

 The outdoor fresh air enters the first air chamber 17 from the fresh air passage 11, exchanges heat and mass with the second heat exchanger 33, and the fresh air of low temperature and low humidity is heated by the heat of the second heat exchanger 33, and the fresh air of the drying absorbs the second. The moisture absorbed by the moisture absorbing material on the fins of the heat exchanger 33 in the third cycle is such that the part of the moisture absorbing material is regenerated, and the fresh air is heated and humidified, and then sent to the room through the first air supply passage 14; The air passage 12 enters the second air chamber 18, and performs heat and mass transfer exchange with the third heat exchanger 35. The high temperature and high humidity return air is cooled by the low temperature refrigerant in the third heat exchanger 35, and the heat in the return air is recovered. And the water vapor in the return air is absorbed by the moisture absorbing material on the fins of the third heat exchanger 35, and the air cooled and dehumidified is discharged into the atmosphere via the exhaust passage 15, when the time set by the fourth cycle is expired, Triggering into the third cycle, such a cycle, thereby achieving independent control of humidification and heating;

 The third air chamber unit is provided with a second end, a fourth end, a fourth heat exchanger 37, a second return air passage 13, a second air supply passage 16, and a third air chamber 19, and the second return air passage 13 And the second air supply passages 16 are respectively located at two sides of the third air chamber unit,

 When the multi-connected air conditioning system is in a cooling condition, the first refrigerant flowing out from the fourth end of the outdoor unit flows into the fourth end of the indoor unit, and flows into the outdoor unit via the fourth heat exchanger 37 and the second end of the indoor unit. The second end is then returned to the shunt unit;

As the first heat exchanger 4 of the condenser, heat is discharged into the atmosphere; as the fourth heat exchanger 37 of the evaporator, the indoor return air enters the third air chamber 19 from the second return air passage 13 and is exchanged with the fourth heat exchange The refrigerant in the device 37 exchanges heat, and the heat of the return air is cooled by the evaporator (fourth heat exchanger 37) Take away, the air is cooled and then sent into the room by the second air supply passage 16;

 When the multi-line system is in the heating condition, the first heat exchanger 4 functions as an evaporator and the fourth heat exchanger 37 serves as a condenser, and the first refrigerant flows into the second end of the indoor unit via the second end of the outdoor unit. And flowing through the fourth heat exchanger 37, flowing out through the fourth end of the indoor unit, flowing into the fourth end of the outdoor unit, flowing through the first heat exchanger 4, and then flowing back to the splitting unit;

 As the first heat exchanger 4 of the evaporator, heat is absorbed from the atmosphere; as the fourth heat exchanger 37 of the condenser, the indoor return air enters the third air chamber 19 from the second return air passage 13 and is connected to the fourth heat exchanger The heat exchange is performed at 37, and the condenser (fourth heat exchanger 37) discharges heat into the return air, and after the air is heated, it is sent into the room by the second air supply passage 16.

 The splitting unit comprises: a compressor 1, a unidirectional wide 2 and a gas-liquid separator 6, 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 2 and the switching unit respectively One end is connected, the input end of the gas-liquid separator 6 is connected to the output end of the switching unit and the third end, and the output end of the gas-liquid separator 6 is connected to the input end of the compressor 1.

 The switching unit is the first four-way reversing width 3, the first end of the first four-way reversing width 3 is connected with the output end of the one-way wide 2, and the second end of the first four-way reversing wide 3 is replaced with the first one. The input end of the heat exchanger 4 is connected, the third end of the first four-way reversing width 3 is connected to the input end of the gas-liquid separator 6, the fourth end of the first four-way reversing to the third end and the second end of the outdoor unit Connected.

 Preferably, the first end of the outdoor unit is the first cut-off width 7 , the second end of the outdoor unit is the second cut-off width 8 , the third end of the outdoor unit is the third cut-off width 9 , and the fourth end of the outdoor unit is The fourth cut is 10 wide.

 Preferably, the outdoor unit may further include: an input end connected to the output end of the first heat exchanger 4, and a first electronic expansion width 5 connected to the input end of the fourth cut-off width 10.

 Thus, specifically, the outdoor unit 01 includes: a compressor 1, a unidirectional width 2, a first four-way reversing width 3, a first heat exchanger 4, a first electronic expansion width 5, a gas-liquid separator 6, and a first One cut-off width 7, second cut-off width 8, third cut-off width 9 and fourth cut-off width 10, of which

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 2 is respectively connected with the first end of the first four-way reversing width 3 and the input end of the first cut-off width 7, respectively. The second end of the four-way reversing width 3 is connected to the input end of the first heat exchanger 4, and the output end of the first heat exchanger 4 is connected to the input end of the first electronic expansion width 5, and the first electronic expansion is 5 The output end is connected to the input end of the fourth cut-off width 10, the output end of the fourth cut-off width 10 is connected to the indoor unit 02, and the third end of the first four-way change width 3 is respectively connected with the input end of the gas-liquid separator 6 and The input ends of the third cut-off width 9 are connected, the output end of the gas-liquid separator 6 is connected to the input end of the compressor 1, and the fourth end of the first four-way commutating width 3 is connected to the input end of the second cut-off width 8. , the first cut-off width 7, the second cut The outputs of the wide 8 and the third cut-off width 9 are respectively connected to the indoor unit 02.

 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.

 In the embodiment of the present invention, the first air chamber unit may further include: a first wind width 20, a second wind width 21, a fifth wind width 24, a sixth wind width 25, a first air duct 28, and a third air duct. 30, where

 A fresh air passage 11 is opened at one end of the inner wall of the first air chamber 17, and a first air supply passage 14 is opened at the other end of the inner wall, and the fresh air passage 11 is connected to the first air supply passage 14 and is adjacent to the inner wall of the fresh air passage 11 at one end. The first damper 20 and the second damper 21 are provided with a fifth wind width 24 and a sixth wind width at the other end of the inner wall of the first air supply passage 14 leading to the fresh air passage 11 and adjacent to the first air supply passage 14. 25; in the first air chamber 17, is provided with a second heat exchanger 33;

 At a junction of the first plenum 17 and the second plenum 18, a first duct 28 connecting the second plenum 21 to the second plenum unit is provided, and the fifth louver 24 is connected to the second The third duct 30 of the plenum unit.

 The second air chamber unit further includes: a third wind width 22, a fourth wind width 23, a seventh wind width 26, an eighth wind width 27, a second air duct 29, a fourth air duct 31, and a second four-way commutation The width 32 and the second electronic expansion are 34, wherein

 a first return air passage 12 is defined at one end of the inner wall of the second air chamber 18 and the first air chamber 17 , and the other end of the inner wall is provided with an exhaust passage 15 , and the first return air passage 12 leads to the exhaust passage 15 , and A third wind width 22 and a fourth wind width 23 are disposed near one end of the inner wall of the first return air passage 12, and the exhaust air passage 15 leads to the first return air passage 12 and is adjacent to the other end of the inner wall of the air exhaust passage 15, a seventh wind width 26 and an eighth wind width 27 are provided; in the second air chamber 18, a second four-way reversing width 32, a second electronic expansion width 34, and a third heat exchanger 35 are disposed;

 At a junction of the first plenum 17 and the second plenum 18, a second duct 29 connecting the fourth plenum 23 to the first plenum 17 is provided, and the seventh louver 26 is connected to the first The fourth duct 31 of the air chamber 17.

 The third air chamber unit further includes: a third electronic expansion width 36,

 The third plenum 19 and the second plenum 18 are impervious to air;

 A third return air passage 13 is defined at one end of the inner wall of the third air chamber 19 and the first air chamber 17, and a second air supply passage 16 is opened at the other end of the inner wall, and a third electronic unit is disposed in the third air chamber 19 An expansion width 36 and a fourth heat exchanger 37;

The output end of the first cut-off width 7 is connected to the second end of the second four-way commutation width 32, and the second four-way The first end of the commutation width 32 is connected to one end of the second heat exchanger 33, the other end of the second heat exchanger 33 is connected to one end of the second electronic expansion flange 34, and the other end of the second electronic expansion flange 34 is One end of the three heat exchangers 35 is connected, the other end of the third heat exchanger 35 is connected to the third end of the second four-way reversing width 32, and the fourth end of the second four-way reversing is 32 and the third end is wide The output end of the second cut-off width 8 is connected to one end of the fourth heat exchanger 37, and the other end of the fourth heat exchanger 37 is connected to one end of the third electronic expansion width 36, and the third electronic expansion is wide. The other end of 36 is connected to the output of the fourth cut-off width 10.

 Preferably, in the embodiment of the present invention, the first heat exchanger 4, the second heat exchanger 33, the third heat exchanger 35 and the fourth heat exchanger 37 are aluminum foil finned copper tube heat exchangers or aluminum fins. The fins of the chip microchannel heat exchanger, the second heat exchanger 33 and the third heat exchanger 35 are coated with a moisture absorbing material.

 In the embodiment of the invention, the flow of the refrigerant in the multi-connected air conditioning system is:

 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 from the unidirectional width 2 is divided into two parts, and a part of the refrigerant (the first refrigerant) enters the first The four-way reversing the first end of the wide 3, the other part of the refrigerant (the second refrigerant) enters the first cut-off width 7 and is output to the indoor unit 02 via the first cut-off width 7;

 When the multi-connected air conditioning system is in a cooling condition, the first end of the first four-way reversing width 3 is in communication with the second end, and the third end is in communication with the fourth end, and the liquid supply amount of the evaporator is adjusted according to a preset procedure. An electronic expansion width of 5 full opening, a second electronic expansion width 34 and a third electronic expansion width 36 respectively function as a throttling to regulate the flow of refrigerant flowing through;

 The first heat exchanger 4 serves as a condenser and the fourth heat exchanger 37 serves as an evaporator. The first refrigerant is switched from the first four-way to the second end of the wide 3, and sequentially enters the first heat exchanger 4, first. The electronic expansion width 5, the fourth cut-off width 10, the third electronic expansion width 36, the fourth heat exchanger 37 and the second cut-off width 8 are then returned to the fourth end of the first four-way reversing wide 3, via the first The third end of the four-way reversing wide 3 enters the gas-liquid separator 6, and finally enters the compressor 1 from the suction port (input end) of the compressor;

 The second refrigerant enters the second end of the second four-way reversing width 32 from the outlet (output end) of the first cut-off width 7

In the first cycle, the second heat exchanger 33 acts as an evaporator and the third heat exchanger 35 acts as a condenser, and the first end of the second four-way commutation width 32 is in communication with the fourth end and the second end is Three-terminal communication, the second refrigerant is switched from the second four-way to the second end of the wide 32, and the second end of the second-way is changed to the third end of the wide 32, and sequentially enters the third heat exchanger 35, the second electron The first end, the fourth end, and the third cut-off width 9 of the expansion flange 34, the second heat exchanger 33, and the second four-way reversing width 32 are finally returned to the gas-liquid separator 6, and the compressor suction port ( Input) enters compressor 1; In the second cycle, the second heat exchanger 33 acts as a condenser and the third heat exchanger 35 acts as an evaporator, and the first end of the second four-way commutation width 32 is in communication with the second end and the third end is The fourth end is connected, the second refrigerant is switched from the second four-way to the second end and the first end of the wide 32, and sequentially enters the second heat exchanger 33, the second electronic expansion flange 34, and the third heat exchanger 35. The second four-way reversing the third end, the fourth end of the wide 32, and the third cut-off width 9, returning to the gas-liquid separator 6, and finally entering the compressor 1 by the compressor suction port (input).

 When the multi-line system is in the heating condition, the first end of the first four-way reversing width 3 is in communication with the fourth end, the second end is connected to the third end, and the third electronic expansion is 36 wide open, the first electron The expansion width 5 and the second electronic expansion width 34 respectively function as throttling;

 The first heat exchanger 4 serves as a condenser and the fourth heat exchanger 37 serves as a condenser. The first refrigerant is exchanged to the first end and the fourth end of the wide 3 via the first four-way, and sequentially enters the second cut-off width 8 a fourth heat exchanger 37, a third electronic expansion width 36, a fourth cut-off width 10, a first electronic expansion width 5, and a first heat exchanger 4, and reflowing to the second end of the first four-way commutation width 3 , enters the gas-liquid separator 6 through the third end of the first four-way to the wide 3, and finally enters the compressor 1 from the compressor suction port (input end); the second refrigerant is discharged from the first cut-off width 7 (output) enters the second end of the second four-way reversing width 32,

 In the third cycle, the second heat exchanger 33 acts as an evaporator and the third heat exchanger 35 acts as a condenser, and the first end of the second four-way commutation width 32 is in communication with the fourth end and the second end is Three-terminal communication, the second refrigerant is switched from the second four-way to the second end of the wide 32, and the second end of the second-way is changed to the third end of the wide 32, and sequentially enters the third heat exchanger 35, the second electron The first end, the fourth end and the third cut-off width 9 of the expansion flange 34, the second heat exchanger 33, the second four-way reversing width 32, finally return to the gas-liquid separator 6, and finally the compressor suction port (input) into the compressor 1;

 In the fourth cycle, the second heat exchanger 33 acts as a condenser and the third heat exchanger 35 acts as an evaporator, and the first end of the second four-way commutation width 32 is in communication with the second end and the third end is The fourth end is connected, the second refrigerant is switched from the second four-way to the second end and the first end of the wide 32, and sequentially enters the second heat exchanger 33, the second electronic expansion flange 34, and the third heat exchanger 35. The second four-way reversing the third end, the fourth end of the wide 32, and the third cut-off width 9, returning to the gas-liquid separator 6, and finally entering the compressor 1 by the compressor suction port (input).

 The following is a detailed description of the independent control of indoor cooling and dehumidification (cooling) in summer and the independent control of heating and humidification (heating) in winter.

 Independent control of indoor cooling and dehumidification in summer:

For indoor temperature control, at this time, the multi-connected air conditioning system is in a cooling condition, and the first heat exchanger 4 As a condenser, heat is discharged into the atmosphere; the fourth heat exchanger 37 serves as an evaporator, and the indoor return air enters the third air chamber 19 from the second return air passage 13 and exchanges heat with the refrigerant in the fourth heat exchanger 37. The heat of the return air is taken away by the low temperature refrigerant in the evaporator (the fourth heat exchanger 37), and the air is cooled and sent into the room by the second air supply passage 16;

 Under the cooling condition, the fourth heat exchanger 37 bears most of the indoor sensible heat load, and functions as a cooling function;

 For indoor humidity control, the initial time (first cycle), the second heat exchanger 33 acts as an evaporator and the third heat exchanger 35 acts as a condenser; at this time, the first wind width 20, the third wind width 22, the first The six winds wide 25 and the eighth wind width 27 are open, the second wind width 21, the fourth wind width 23, the fifth wind width 24 and the seventh wind width 26 are closed, and the outdoor fresh air is entered by the fresh air passage 11 through the first wind width 20 The first air chamber 17 performs heat and mass transfer with the second heat exchanger 33, and the fresh air of high temperature and high humidity is cooled by the second heat exchanger 33, and the water vapor in the fresh air is winged by the second heat exchanger 33. The moisture absorption material on the sheet is absorbed, and the fresh air is cooled and dehumidified, passes through the sixth wind width 25, and is sent into the room by the first air supply passage 14;

 The indoor return air passes through the first return air passage 12, enters the second air chamber 18 via the third wind width 22, performs heat and mass transfer exchange with the third heat exchanger 35, and the low temperature and low humidity return air absorbs the third heat exchanger 35. Exhaust heat, the amount of cold in the return air is recovered, and the return air takes away the moisture absorbed by the moisture absorbing material on the fins of the third heat exchanger 35 in the previous cycle, so that the moisture in the part of the moisture absorbing material is sucked away. , thereby achieving regeneration, and the heated and humidified air is discharged into the atmosphere through the exhaust duct 15 via the eighth wind width 27;

 After a predetermined time, the water absorption mass on the fins of the second heat exchanger 33 is increased, and the moisture absorbing material on the fins of the third heat exchanger 35 is regenerated (dried), triggering the control of the second four-way reversing width 32 Reversing, entering the second cycle, the second heat exchanger 33 acts as a condenser and the third heat exchanger 35 acts as an evaporator. At this time, the first wind width 20, the third wind width 22, the sixth wind width 25 and The eighth wind width 27 is closed, the second wind width 21, the fourth wind width 23, the fifth wind width 24 and the seventh wind width 26 are opened, and the fresh air is entered into the first air duct 28 by the fresh air passage 11 via the second wind width 21, Then entering the second air chamber 18, performing heat and mass transfer with the third heat exchanger 35, the high temperature and high humidity fresh air is cooled and cooled by the third heat exchanger 35, and the water vapor in the fresh air is used by the third heat exchanger 35. The moisture absorption material on the fins is absorbed, and the fresh air is cooled and dehumidified, passes through the third air duct 30, passes through the fifth air gap 24, and finally is sent into the room through the first air supply passage 14;

The indoor return air enters the second air duct 29 from the first air return passage 12 via the fourth wind width 23, and then enters the first air chamber 17, exchanges heat and mass with the second heat exchanger 33, and returns to the low temperature and low humidity. Absorbing the heat of the second heat exchanger 33, the cooling amount in the return air is recovered, and the return air takes away the moisture absorbed by the moisture absorbing material on the fins of the second heat exchanger 33 in the previous cycle, so that the portion is hygroscopic Material regeneration, The heated and humidified air passes through the fourth air duct 31, and is discharged into the atmosphere through the exhaust air passage 15 through the seventh wind width 26. When the time set by the second circulation period is reached, the trigger enters the first circulation period, and thus the cycle is performed. Thereby achieving independent control of cooling and dehumidification;

 In the cooling condition, the second heat exchanger 33 and the third heat exchanger 35 are switched by the second four-way commutation width 32 to realize timing switching between the evaporator and the condenser, and the two heat exchangers bear indoors. The latent heat load and part of the sensible heat load function to dehumidify and cool down.

 Independent control of indoor heating and humidification in winter:

 For indoor temperature control, the multi-connected air conditioning system is in a heating condition, including an alternating third cycle period and a fourth cycle period. During the entire cycle, the first heat exchanger 4 acts as an evaporator to absorb heat from the atmosphere. The fourth heat exchanger 37 serves as a condenser, and the indoor return air enters the third air chamber 19 from the second return air passage 13 and exchanges heat with the fourth heat exchanger 37, and the condenser (fourth heat exchanger 37) will The heat is discharged into the return air, and after the air is heated, it is sent into the room by the second air supply passage 16;

 Under the heating condition, the fourth heat exchanger 37 bears most of the indoor sensible heat load and functions as a heating function;

 For indoor humidity control, at the initial time (third cycle), the second heat exchanger 33 acts as an evaporator and the third heat exchanger 35 acts as a condenser. At this time, the first wind width 20, the third wind width 22, the first The six winds wide 25 and the eighth wind width 27 are closed, the second wind width 21, the fourth wind width 23, the fifth wind width 24 and the seventh wind width 26 are opened, and the fresh air is entered by the fresh air passage 11 through the second wind width 21 A duct 28 enters the second air chamber 18 and exchanges heat and mass with the third heat exchanger 35. The fresh air of low temperature and low humidity is heated by the heat of the third heat exchanger 35, and the fresh air of the dry air absorbs the third. The moisture absorbing material on the fins of the heat exchanger 35 absorbs moisture in the previous cycle, so that the part of the moisture absorbing material is dried and regenerated, and the fresh air is heated and humidified, passes through the third air duct 30, and then passes through the fifth wind width 24, and finally Being sent into the room by the first air supply passage 14;

 The indoor return air enters the second air duct 29 from the first air return passage 12 via the fourth wind width 23, and then enters the first air chamber 17, and performs heat and mass transfer with the second heat exchanger 33, and the high temperature and high humidity are returned. The wind is cooled by the low temperature refrigerant in the second heat exchanger 33, the heat in the return air is recovered, and the water vapor in the return air is absorbed by the moisture absorbing material on the fins of the second heat exchanger 33, and the air is cooled and dehumidified. After passing through the fourth air duct 31, the seventh air duct 26 is discharged into the atmosphere by the exhaust passage 15;

After a predetermined time, the moisture absorbing material on the fins of the second heat exchanger 33 is increased in mass by adsorbing water vapor in the return air, and the moisture absorbing material on the fins of the third heat exchanger 35 is regenerated. Four-way commutation wide 32 commutation, triggering into the fourth cycle, second heat exchanger 33 As the condenser and the third heat exchanger 35 as the evaporator, at this time, the first wind width 20, the third wind width 22, the sixth wind width 25, and the eighth wind width 27 are opened, and the second wind width 21, fourth The wind width 23, the fifth wind width 24 and the seventh wind width 26 are closed, and the outdoor fresh air enters the first air chamber 17 through the first air gap 20 through the fresh air passage 11, and exchanges heat and mass with the second heat exchanger 33, The low temperature and low humidity fresh air is heated by the exhaust heat of the second heat exchanger 33, and the dry fresh air absorbs the moisture absorbed by the moisture absorbing material on the fins of the second heat exchanger 33 in the previous cycle, so that the part of the moisture absorbing material is regenerated, and the fresh air is regenerated. After heating and humidifying, passing through the sixth wind width 25, and being sent into the room by the first air supply passage 14;

 The indoor return air enters the second air chamber 18 through the first air return passage 12 through the third wind width 22, and performs heat and mass transfer exchange with the third heat exchanger 35, and the high temperature and high humidity return air is used by the third heat exchanger 35. The low temperature refrigerant is cooled, the heat in the return air is recovered, and the water vapor in the return air is absorbed by the moisture absorbing material on the fins of the third heat exchanger 35, and the air cooled and dehumidified is discharged through the eighth wind width 27 The air passage 15 is discharged into the atmosphere, and when the time set by the fourth cycle is reached, the triggering enters the third cycle, and the cycle is performed, thereby achieving independent control of humidification and heating;

 Under the heating condition, the second heat exchanger 33 and the third heat exchanger 35 are switched by the second four-way commutation width 32, thereby achieving timing switching between the evaporator and the condenser, so that the second heat exchange The device 33 and the third heat exchanger 35 can perform indoor latent heat load and partial sensible heat load, and function as humidification and heating.

 2 is a schematic structural view of an outdoor unit according to another embodiment of the present invention. Referring to FIG. 2, the outdoor unit includes: a compressor 1, a unidirectional wide 2, a first four-way reversing width 3, a first heat exchanger 4, a first electronic expansion width 5, a gas-liquid separator 6, a first cut-off The width 7, the second cut width 8, the third cut width 9, the fourth cut width 10, and the heat exchanger 38, and the outdoor unit 01 in Fig. 1, the first four-way reversing the third end and the third end The output end of the cut-off width 9 is connected, and the output end of the first electronic expansion width 5 is connected to the input end of the fourth cut-off width 10. In the embodiment of the present invention, the built-in heat exchanger 38 and the heat exchanger 38 are added. The first end is connected to the input end of the gas-liquid separator 6 and the third end of the first four-way reversing width 3, and the second end of the heat exchanger 38 is connected to the output end of the first electronic expansion wide 5, the heat The third end of the exchanger 38 is connected to the input of the fourth cut-off width 10, and the third end of the heat exchanger 38 is connected to the input of the third cut-off width 9.

 In the embodiment of the present invention, the heat exchanger 38 is actually a gas-liquid exchanger, and the principle of its optimized operation is as follows:

The refrigerant in the pipeline between the first electronic expansion width 5 and the fourth cut-off width 10 is the first refrigerant before flowing out from the condenser and before the throttling, and is a high-temperature high-pressure refrigerant liquid; The refrigerant in the pipeline between the gas-liquid separator 6 and the refrigerant that flows out of the evaporator and is about to enter the compression The second refrigerant of the machine is a low-temperature low-pressure refrigerant gas; by adding the built-in heat exchanger 38, the heat exchange between the first liquid refrigerant and the second refrigerant can be realized, and the throttling can be achieved. The pre-high temperature and high pressure refrigerant liquid has a subcooling degree of 10~15 °C, and the low temperature and low pressure refrigerant gas before entering the compressor has a superheat degree of 2~5 °C, thereby improving the operation efficiency of the multi-line system and ensuring compression. The safe operation of the machine.

 In the embodiment of the present invention, as described above, since the connection of the air duct in the indoor unit 02 has various forms, for example, in the first air chamber and the second air chamber, the second air gap 21 can be passed through the first air duct. 28 is connected to the second air chamber, and the first wind width 20 is connected to the first air chamber. The first air gap 20 may be connected to the second air chamber through the first air duct 28, and the second air width 21 is connected to the first air chamber. The wind room, therefore, the corresponding wind width opening and closing rules also come in many forms. Specifically, no matter how the air ducts in the indoor unit 02 are connected and how the opening and closing rules of the wind width are set, the following functions can be realized as long as the design of the air duct in the indoor unit 02 and the opening and closing rules of the wind tunnel can realize the following functions:

 During the summer dehumidification and dehumidification, the fresh air and the evaporator perform heat and mass transfer to achieve the cooling and dehumidification of the fresh air; the return air and the condenser perform heat and mass transfer to realize the regeneration of the moisture absorbing material on the fins of the condenser and recover the return air. Cooling capacity

 During heating and humidification in winter, the fresh air and the condenser perform heat and mass transfer to achieve heating and humidification of the fresh air, and regeneration of the moisture absorbing material on the fins of the condenser; heat and mass transfer of the return air and the evaporator are recovered. Heat and water vapor in the wind.

 FIG. 3 is a schematic structural view of an indoor unit according to another embodiment of the present invention. Referring to FIG. 3, different from the indoor unit of FIG. 1, the first air chambers 17 and the second air chambers 18 are connected in different manners. In the embodiment of the present invention, the first air ducts 28 are connected to the first air gaps 20 And the second air chamber 18, that is, the first air gap 20 is connected to the second air chamber 18 through the first air duct 28, the second air duct 29 is connected to the third wind width 22 and the first air chamber 17, and the third air duct 30 Connecting the sixth wind width 25 and the second air chamber 18, the fourth air duct 31 is connected to the eighth wind width 27 and the first air chamber 17, and the corresponding wind width opening and closing rules are as follows: For summer cooling and dehumidification,

 When the second heat exchanger 33 is an evaporator and the third heat exchanger 35 is a condenser, the second wind width 21, the fourth wind width 23, the fifth wind width 24, and the seventh wind width 26 are opened, and the first wind The width 20, the third wind width 22, the sixth wind width 25 and the eighth wind width 27 are closed;

 When the second heat exchanger 33 is a condenser and the third heat exchanger 35 is an evaporator, the second wind width 21, the fourth wind width 23, the fifth wind width 24, and the seventh wind width 26 are closed, and the first wind Wide 20, third wind width 22, sixth wind width 25 and eighth wind width 27 open;

For heating and humidification in winter, When the second heat exchanger 33 is an evaporator and the third heat exchanger 35 is a condenser, the second wind width 21, the fourth wind width 23, the fifth wind width 24, and the seventh wind width 26 are closed, and the first wind Wide 20, third wind width 22, sixth wind width 25 and eighth wind width 27 open;

 When the second heat exchanger 33 is a condenser and the third heat exchanger 35 is an evaporator, the second wind width 21, the fourth wind width 23, the fifth wind width 24, and the seventh wind width 26 are opened, and the first wind The width 20, the third wind width 22, the sixth wind width 25 and the eighth wind width 27 are closed.

 In the embodiment of the present invention, the positions of the second four-way reversing width 32 and the second electronic expansion width 34 in the indoor unit 02 are not necessarily limited to the second air chamber 18, and the pressure loss inside the refrigerant pipeline can be reduced and the pipeline can be facilitated. From the perspective of laying, the two components are installed in other reasonable positions.

 It can be seen from the above that the multi-connected air conditioning system of the embodiment of the present invention can effectively reduce the equipment cost by sharing the outdoor unit, and can realize centralized management of each indoor unit, and can independently start one indoor unit operation, or can simultaneously start multiple units. The indoor unit is running, making control more flexible.

 Further, the indoor unit can realize independent control of temperature and humidity, and can realize the continuous operation of fresh air ventilation, return air cooling, dehumidification and cooling in summer, as well as fresh air ventilation, return air heat recovery, humidification and supply in winter. The continuous operation of the heat, the indoor unit is compact in structure and high in equipment integration; Moreover, by recovering the cooling capacity and heat of the return air, the evaporating temperature of the multi-connected air conditioning system is higher and the condensing temperature is lower, thereby enabling the operation of the multi-connected air conditioning system The energy efficiency ratio is high, and the energy efficiency ratio of the operation of the multi-connected air conditioning system is improved; in addition, by adjusting the ratio of the two refrigerants at the one-way wide outlet (output end) in the outdoor unit, the multi-connected air conditioning system can be controlled to adjust the indoor sensible heat and The proportion of latent heat.

 4 is a schematic flow chart of a method for controlling temperature and humidity in a multi-connected air conditioning system according to an embodiment of the present invention. Referring to Figure 4, the process includes:

 Step 401: Converging the first refrigerant input by the switching unit of the outdoor unit and the second refrigerant input by the third end of the outdoor unit, compressing by the splitting unit, performing splitting, respectively outputting the first refrigerant and the first refrigerant Two refrigerants;

 In this step, the shunting 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 is respectively connected with the switching unit and the first end Connected, the input end of the gas-liquid separator is connected to the output end of the switching unit and the third end of the outdoor unit, and the output end of the gas-liquid separator is connected to the input end of the compressor.

Step 402, the second refrigerant outputted by the flow dividing unit is output to the first end of the indoor unit through the first end of the outdoor unit, sequentially flows through the second condenser of the indoor unit and the second evaporator, and from the indoor unit The third end of the outdoor device flows back to the shunt unit through the third end of the outdoor unit; In this step, the second condenser is the second heat exchanger, the second evaporator is the third heat exchanger, and if the second condenser is the third heat exchanger, the second evaporator is the second heat exchanger .

 Step 403: The first refrigerant outputted by the flow dividing unit is switched, sequentially flows through the first condenser, the first evaporator, and enters the flow dividing unit.

 In this step, the component to be switched is the first four-way commutation wide, the first end of the first four-way commutation is connected to the unidirectional wide output end, and the first four-way reversing the second end and the second end The input end of a heat exchanger is connected, the third end of the first four-way commutation is connected to the input end of the gas-liquid separator, and the fourth end of the first four-way reversing is connected to the second end of the outdoor unit.

 Wherein, the first refrigerant outputted by the splitting unit is switched, sequentially flows through the first condenser, the first evaporator, and enters the splitting unit, and includes:

 When the multi-connected air conditioning system is in a cooling condition, the first heat exchanger in the outdoor unit is controlled as the first evaporator, and the fourth heat exchanger in the indoor unit is used as the first evaporator;

 The first refrigerant outputted by the flow dividing unit is switched and flows through the first heat exchanger, and is output to the fourth end of the indoor unit through the fourth end of the outdoor unit, and passes through the fourth heat exchanger of the indoor unit, and is The second end of the machine returns to the second end of the outdoor unit, and enters the diverting unit through the second end of the outdoor unit;

 When the multi-connected air conditioning system is in a heating condition, the first heat exchanger in the outdoor unit is controlled as the first evaporator, and the fourth heat exchanger in the indoor unit is used as the first condenser;

 Switching the first refrigerant to the second end of the indoor unit via the second end, flowing through the fourth heat exchanger through the second end of the indoor unit, flowing out through the fourth end of the indoor unit, and flowing into the outdoor unit The four ends pass through the first heat exchanger through the fourth end of the outdoor unit, and then flow back to the splitting unit.

 In the embodiment of the present invention, the outdoor unit includes: a compressor, a unidirectional wide, a first four-way commutation, a first heat exchanger, a first electronic expansion, a gas-liquid separator, a first cut-off width, and a second cut-off Wide, third cut wide and fourth cut wide;

 The indoor unit includes: a fresh air passage, a first return air passage, a second return air passage, a first air supply passage, an exhaust air passage, a second air supply passage, a first air chamber, a second air chamber, a third air chamber, The first wind width, the second wind width, the third wind width, the fourth wind width, the fifth wind width, the sixth wind width, the seventh wind width, the eighth wind width, the first air duct, the second air duct, a third air duct, a fourth air duct, a second four-way commutation wide, a second heat exchanger, a second electronic expansion wide, a third heat exchanger, a third electronic expansion wide, and a fourth heat exchanger;

 The method for controlling the temperature and humidity in the multi-connected air conditioning system is specifically as follows:

The refrigerant is discharged from the output end of the compressor into a one-way wide, and the high-pressure refrigerant gas that is unidirectionally wide is divided into a first refrigerant and a second refrigerant, and the first refrigerant enters the cut. The first four-way in the changing unit is switched to the first end of the wide, the second refrigerant enters the first cut-off width of the first end of the outdoor unit, and is output to the indoor unit via the first cut-off width;

 When the multi-connected air conditioning system is in a cooling condition, the first end of the first four-way commutation is connected to the second end, and the third end is connected to the fourth end, and the first liquid supply of the evaporator is adjusted according to a preset procedure. The electronic expansion is wide open, the second electronic expansion is wide, and the third electronic expansion is wide to regulate the flow of the refrigerant; the first heat exchanger acts as a condenser and the fourth heat exchanger acts as an evaporator, and the first refrigerant is a four-way reversing wide second end, sequentially entering the first heat exchanger, the first electronic expansion wide, the fourth cut wide, the third electronic expansion wide, the fourth heat exchanger and the second cut-off width, and then flowing back to The first four-way reversing the wide fourth end, entering the gas-liquid separator via the first four-way commutating third end, and finally entering the compressor from the compressor input end;

 The second refrigerant enters the second four-way commutating second end from the first cut-off output end; in the first cycle, the second heat exchanger acts as an evaporator and the third heat exchanger acts as a condenser The first wide, the third wide, the sixth wide and the eighth wide open, the second wide, the fourth wide, the fifth wide and the seventh wide open;

 The first end of the second four-way commutation is in communication with the fourth end, and the second end is in communication with the third end, and the second refrigerant is commutated from the second four-way to the second end of the second, through the second four-way Reversing the wide third end, sequentially entering the third heat exchanger, the second electronic expansion wide, the second heat exchanger, the second four-way commutating first end, the fourth end, and the third cut-off width, and finally Returning to the gas-liquid separator, entering the compressor from the compressor input;

 In the second cycle, the second heat exchanger acts as a condenser and the third heat exchanger acts as an evaporator, and the first wind width, the third wind width, the sixth wind width, and the eighth wind width are closed, and the second wind width is wide. The fourth wind width, the fifth wind width and the seventh wind width open;

 The first end of the second four-way reversing direction is in communication with the second end, and the third end is in communication with the fourth end, and the second refrigerant is switched from the second four-way to the second end of the second end, the first end, in turn Entering the second heat exchanger, the second electronic expansion wide, the third heat exchanger, the third end of the second four-way commutation, the fourth end, and the third cut-off width, and then returning to the gas-liquid separator, and finally The compressor input enters the compressor;

 When the multi-line system is in the heating condition, the first end of the first four-way reversing is connected to the fourth end, the second end is connected to the third end, the third electronic expansion is wide open, and the first electronic expansion is wide. And the second electronic expansion width respectively acts as a throttling;

The first heat exchanger acts as an evaporator and the fourth heat exchanger acts as a condenser. The first refrigerant is commutated to the first end and the fourth end of the first through the first four-way, and sequentially enters the second cut-off width and the fourth change. Heater, third electronic expansion wide, fourth cut wide, first electronic expansion wide and first heat exchanger, reflow to The first four-way reversing the wide second end, entering the gas-liquid separator via the first four-way commutating third end, and finally entering the compressor from the compressor input end;

 The second refrigerant enters the second four-way commutating second end from the first cut-off output end; in the third cycle, the second heat exchanger acts as an evaporator and the third heat exchanger acts as a condenser The first wind width, the third wind width, the sixth wind width and the eighth wind width are closed, the second wind width, the fourth wind width, the fifth wind width and the seventh wind width open;

 The first end of the second four-way commutation is in communication with the fourth end, and the second end is in communication with the third end, and the second refrigerant is commutated from the second four-way to the second end of the second, through the second four-way Reversing the wide third end, sequentially entering the third heat exchanger, the second electronic expansion wide, the second heat exchanger, the second four-way commutating first end, the fourth end, and the third cut-off width, and finally Returning to the gas-liquid separator, and finally entering the compressor from the compressor input;

 In the fourth cycle, the second heat exchanger acts as a condenser and the third heat exchanger acts as an evaporator, and the first wind width, the third wind width, the sixth wind width, and the eighth wind width open, the second wind is wide, The fourth wind width, the fifth wind width and the seventh wind width are closed;

 The first end of the second four-way reversing direction is in communication with the second end, and the third end is in communication with the fourth end, and the second refrigerant is switched from the second four-way to the second end of the wide end, the first end, in turn Entering the second heat exchanger, the second electronic expansion wide, the third heat exchanger, the third end of the second four-way commutation, the fourth end, and the third cut-off width, and then returning to the gas-liquid separator, and finally The compressor input enters the compressor. 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

Claim
A multi-connected air conditioning system, the system comprising: an outdoor unit and an indoor unit, wherein
 The outdoor unit includes: a control unit, a splitting unit, a switching unit, a first heat exchanger, a first end, a second end, a third end, and a fourth end;
 The indoor unit includes: a first air chamber unit, a second air chamber unit, and a third air chamber unit, wherein the first air chamber unit is provided with a second heat exchanger, a fresh air passage, a first air supply passage, and a first wind a chamber, a fresh air passage and a first air supply passage are respectively located at two sides of the first air chamber unit; the second air chamber unit is provided with a third heat exchanger, a first air return passage, an exhaust air passage, a second air chamber, and a second air chamber The first end and the third end, the first return air passage and the exhaust air passage are respectively located at two sides of the second air chamber unit; and the third air chamber unit is provided with the second end, the fourth end, the fourth heat exchanger, and the second a second return air passage, a second air supply passage, and a third air chamber, wherein the second return air passage and the second air supply passage are respectively located at two sides of the third air chamber unit;
 a control unit, configured to control the first heat exchanger as a condenser and a fourth heat exchanger as an evaporator when the multi-connected air conditioning system is in a cooling condition; and control the first when the multi-connected air conditioning system is in a heating condition The heat exchanger acts as an evaporator and the fourth heat exchanger acts as a condenser;
 a flow dividing unit, configured to merge the first refrigerant input by the switching unit and the second refrigerant input to the third end of the outdoor unit, and after being compressed, perform splitting, respectively outputting the first refrigerant and the second refrigerant Agent
 a first end of the outdoor unit, configured to output the second refrigerant outputted by the flow dividing unit to the first end of the indoor unit;
 a switching unit, configured to: when the multi-connected air conditioning system is in a cooling condition, switch the first refrigerant outputted by the flow dividing unit to flow through the first heat exchanger, and output to the indoor unit through the fourth end of the outdoor unit The fourth end, and passing through the fourth heat exchanger of the indoor unit, is returned from the second end of the indoor unit to the second end of the outdoor unit, and enters the diverting unit through the second end of the outdoor unit;
 When the multi-connected air conditioning system is in a heating condition, the first refrigerant is switched to the second end of the indoor unit via the second end, and flows through the fourth heat exchanger through the second end of the indoor unit through the indoor unit The fourth end flows out and flows into the fourth end of the outdoor unit, flows through the first heat exchanger through the fourth end of the outdoor unit, and then flows back to the splitting unit;
The third end of the outdoor unit is configured to return the second refrigerant flowing out from the third end of the indoor unit to the branching unit.
2. The system of claim 1 wherein:
 When the multi-connected air conditioning system is in a cooling condition,
 As the first heat exchanger of the condenser, the heat is discharged into the atmosphere; the indoor return air enters the third air chamber from the second return air passage and exchanges heat with the refrigerant in the fourth heat exchanger as the evaporator, and the return air The heat is taken away by the low-temperature refrigerant in the evaporator, and the air is cooled and sent to the room by the second air supply passage;
 The indoor unit controls the second heat exchanger and the third heat exchanger to perform cyclic switching in the first cycle and the second cycle:
 In the first cycle, the indoor unit controls the second heat exchanger as the evaporator and the third heat exchanger serves as the condenser, and the second refrigerant input from the first end of the outdoor unit to the first end of the indoor unit flows through the first The second heat exchanger and the third heat exchanger flow out from the third end of the indoor unit, enter the third end of the outdoor unit, and return to the splitting unit through the third end of the outdoor unit;
 The outdoor fresh air enters the first air chamber from the fresh air passage, and exchanges heat and mass with the second heat exchanger. The high temperature and high humidity fresh air is cooled by the second heat exchanger, and the water vapor in the fresh air is used by the second heat exchanger. The moisture absorption material on the fins is absorbed, and the fresh air is cooled and dehumidified and sent to the room by the first air supply passage; the indoor return air enters the second air chamber from the first return air passage, and performs heat and mass transfer with the third heat exchanger. The low temperature and low humidity return air absorbs the heat of the third heat exchanger, the cooling amount in the return air is recovered, and the return air takes away the moisture absorbed by the moisture absorbing material on the fins of the third heat exchanger in the second cycle. The heated and humidified air is discharged into the atmosphere via the exhaust passage;
 In the second cycle, the second heat exchanger is controlled as a condenser and the third heat exchanger is used as an evaporator, and the second refrigerant input from the first end of the outdoor unit to the first end of the indoor unit sequentially flows through the third exchange The heat exchanger and the second heat exchanger flow out from the third end of the indoor unit, enter the third end of the outdoor unit, and return to the flow dividing unit through the third end of the outdoor unit;
 The fresh air enters the second air chamber from the fresh air passage, and exchanges heat and mass with the third heat exchanger. The high temperature and high humidity fresh air is cooled by the third heat exchanger, and the water vapor in the fresh air is replaced by the third heat exchanger. The moisture absorption material on the fin is absorbed, and the fresh air is cooled and dehumidified, passes through the second air chamber, and finally is sent into the room by the first air supply passage;
The indoor return air enters the first air chamber from the first return air passage, exchanges heat and mass transfer with the second heat exchanger, and the low temperature and low humidity return air absorbs the heat of the second heat exchanger, and the cooling capacity in the return air is Recycling, and the return air takes away the moisture absorbed by the moisture absorbing material on the fins of the second heat exchanger in the first cycle, and the heated humidified air is discharged into the atmosphere via the exhaust passage, at a time set in the second cycle To When the trigger enters the first cycle, such a cycle;
 When the multi-line system is in heating,
 As the first heat exchanger of the evaporator, heat is absorbed from the atmosphere; the indoor return air enters the third air chamber from the second return air passage and exchanges heat with the fourth heat exchanger as a condenser, and the condenser discharges heat In the return air, after the air is heated, it is sent into the room by the second air supply passage;
 The indoor unit controls the second heat exchanger and the third heat exchanger to perform the cyclic switching in the third cycle and the fourth cycle:
 In the third cycle, the second heat exchanger is controlled as the evaporator and the third heat exchanger is used as the condenser, and the second refrigerant flowing out from the first end of the outdoor unit flows through the first end of the indoor unit. Passing through the third end of the indoor unit through the third heat exchanger and the second heat exchanger, and flowing into the third end of the outdoor unit, and returning to the flow dividing unit;
 The fresh air enters the second air chamber from the fresh air passage, and exchanges heat and mass with the third heat exchanger. The low temperature and low humidity fresh air is heated by the heat of the third heat exchanger, and the dry fresh air absorbs the wings of the third heat exchanger. The moisture absorbed by the moisture absorbing material on the sheet during the fourth cycle, the fresh air is heated and humidified, and then sent into the room through the first air supply passage;
 The indoor return air enters the first air chamber from the first return air passage, and performs heat and mass transfer exchange with the second heat exchanger, and the high temperature and high humidity return air is cooled by the low temperature refrigerant in the second heat exchanger, and is returned to the wind. The heat is recovered, and the water vapor in the return air is absorbed by the moisture absorbing material on the fins of the second heat exchanger, and the air cooled and dehumidified is discharged into the atmosphere through the exhaust passage;
 In the fourth cycle, the second heat exchanger is controlled as a condenser and the third heat exchanger is used as an evaporator, and the second refrigerant flowing out from the first end of the outdoor unit flows through the first end of the indoor unit in sequence. The second heat exchanger and the third heat exchanger flow out through the third end of the indoor unit, and flow into the third end of the outdoor unit, and return to the flow dividing unit;
 The outdoor fresh air enters the first air chamber from the fresh air passage, and exchanges heat and mass with the second heat exchanger. The low temperature and low humidity fresh air is heated by the heat of the second heat exchanger, and the dry fresh air absorbs the second heat exchanger. The moisture absorbed by the moisture-absorbing material on the fin in the third cycle, the fresh air is heated and humidified, and then sent into the room through the first air supply passage;
The indoor return air enters the second air chamber from the first return air passage, and performs heat and mass transfer exchange with the third heat exchanger. The high temperature and high humidity return air is cooled by the low temperature refrigerant in the third heat exchanger, and the return air is in the return air. The heat is recovered, and the water vapor in the return air is absorbed by the moisture absorbing material on the fins of the third heat exchanger, and the air cooled and dehumidified is discharged into the atmosphere through the exhaust passage, and the time set in the fourth cycle is timed. , trigger into the third cycle, and so on.
The system according to claim 2, wherein the flow dividing 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, and the unidirectional wide output end is respectively connected with the switching unit and the first end, the input end of the gas-liquid separator and the output end of the switching unit and the third end of the outdoor unit Connected, the output of the gas-liquid separator is connected to the input of the compressor.
The system according to claim 3, wherein the switching unit is a first four-way commutating width, and the first end of the first four-way commutating width is connected to the unidirectional wide output end, the first The second end of the four-way reversing width is connected to the input end of the first heat exchanger, and the third end of the first four-way reversing is connected to the input end of the gas-liquid separator, and the first four-way is reversing The four ends are connected to the second end of the outdoor unit.
The system according to claim 4, wherein the first end of the outdoor unit is a first cutoff wide, the second end of the outdoor unit is a second cutoff wide, and the third end of the outdoor unit is a third The cut-off is wide, and the fourth end of the outdoor unit is the fourth cut-off width.
The system according to claim 5, wherein the outdoor unit further comprises: an input end connected to an output end of the first heat exchanger, and an output end connected to the first electronic output of the fourth cut-off wide input end The expansion is wide.
7. The system of claim 6 wherein:
 The output end of the compressor is connected to the one-way wide input end, and the one-way wide output end is respectively connected with the first four-way widened first end and the first cut-off wide input end, and the first four-way commutation is wide The second end is connected to the input end of the first heat exchanger, and the output end of the first heat exchanger is connected to the input end of the first electronic expansion, the first electronically expanded output end and the fourth cut-off wide input end Connected, the fourth cut-off output end is connected to the indoor unit, and the third end of the first four-way reversing width is connected to the input end of the gas-liquid separator and the third cut-off wide input end respectively, the gas-liquid separator The output end is connected to the input end of the compressor, and the fourth end of the first four-way reversing width is connected with the second cut-off wide input end, and the output ends of the first cut-off width, the second cut-off width and the third cut-off width are respectively The indoor unit is connected.
The system according to any one of claims 3 to 7, wherein the compressor is composed of one or more fixed speed compressors, or consists of a variable speed compressor, or a fixed speed compressor and Variable speed compressor combination.
The system according to claim 6, wherein the first air chamber unit further comprises: a first wind width, a second wind width, a fifth wind width, a sixth wind width, a first air duct, and Third duct, wherein
 A new air passage is opened at one end of the inner wall of the first air chamber, and a first air supply passage is opened at the other end of the inner wall, and a first air valve and a first air valve are disposed at a side of the inner wall of the fresh air passage leading to the first air supply passage and close to the fresh air passage. a second damper, wherein the first air supply passage leads to the fresh air passage and is adjacent to the other end of the inner wall of the first air supply passage, and has a fifth wind width and a sixth wind width; and in the first wind chamber, a second change is set Heater
 a first duct connecting the second wind gap to the second air chamber unit, and a fifth wind connecting to the second air chamber unit at a junction of the first air chamber and the second air chamber Three ducts.
The system according to claim 9, wherein the second air chamber unit further comprises: a third wind width, a fourth wind width, a seventh wind width, an eighth wind width, a second air duct, The fourth air duct, the second four-way reversing width, and the second electronic expansion are wide, wherein
 a first return air passage is opened at one end of the inner wall of the second air chamber and the first air chamber, and an exhaust air passage is opened at the other end of the inner air passage, and the first return air passage leads to the exhaust air passage and is adjacent to the first return air passage One end of the inner wall is provided with a third wind width and a fourth wind width, and the seventh wind width and the eighth wind width are disposed at the other end of the inner wall of the exhaust passage leading to the first return air passage and close to the exhaust passage; In the second wind chamber, a second four-way reversing width, a second electronic expansion wide, and a third heat exchanger are disposed; at a junction of the first air chamber and the second air chamber, a fourth wind width connection is provided a second duct to the first plenum, and a fourth duct connected to the first plenum.
11. The system of claim 10, wherein the third plenum unit further comprises: a third electronic expansion,
 The air between the third air chamber and the second air chamber is not permeable;
 a second return air passage is opened at one end of the inner wall of the third air chamber and the first air chamber, and a second air supply passage is opened at the other end of the inner wall, and a third electronic expansion wide and a fourth change are arranged in the third wind chamber. Heater
The first cut-off wide output end is connected to the second four-way commutated second end, the second four-way commutated first end is connected to one end of the second heat exchanger, and the other end of the second heat exchanger With the second electronic expansion One end of the expansion is connected, the other end of the second electronic expansion is connected to one end of the third heat exchanger, and the other end of the third heat exchanger is connected to the third end of the second four-way reversing, the second four-way The fourth end of the commutation is connected to the output end of the third cut-off width, the output end of the second cut-off is connected to one end of the fourth heat exchanger, and the other end of the fourth heat exchanger and the end of the third electronic expansion Connected, the other end of the third electronic expansion is connected to the output of the fourth cut-off width.
12. The system according to claim 11, wherein the first heat exchanger, the second heat exchanger, the third heat exchanger and the fourth heat exchanger are aluminum foil finned copper tube heat exchangers or The fins of the aluminum finned microchannel heat exchanger, the second heat exchanger and the third heat exchanger are coated with a moisture absorbing material.
13. The system of claim 11 wherein:
 The refrigerant is discharged from the output end of the compressor into a one-way wide, and the high-pressure refrigerant gas that is unidirectionally wide is divided into a first refrigerant and a second refrigerant, and the first refrigerant enters the first four-way. Reversing the first end of the wide section, the second refrigerant enters the first cut-off width, and is output to the indoor unit via the first cut-off width;
 When the multi-connected air conditioning system is in a cooling condition, the first end of the first four-way commutation is connected to the second end, and the third end is connected to the fourth end, and the first liquid supply of the evaporator is adjusted according to a preset procedure. The electronic expansion is wide open, the second electronic expansion is wide, and the third electronic expansion is wide to regulate the flow of the refrigerant; the first heat exchanger acts as a condenser and the fourth heat exchanger acts as an evaporator, and the first refrigerant is a four-way reversing wide second end, sequentially entering the first heat exchanger, the first electronic expansion wide, the fourth cut wide, the third electronic expansion wide, the fourth heat exchanger and the second cut-off width, and then flowing back to The first four-way reversing the wide fourth end, entering the gas-liquid separator via the first four-way commutating third end, and finally entering the compressor from the compressor input end;
 The second refrigerant enters the second four-way commutating second end from the first cut-off output end; in the first cycle, the second heat exchanger acts as an evaporator and the third heat exchanger acts as a condenser The first end of the second four-way commutation is in communication with the fourth end, and the second end is in communication with the third end, and the second refrigerant is commutated from the second four-way to the second end of the second, through the second four-way Reversing the wide third end, sequentially entering the third heat exchanger, the second electronic expansion wide, the second heat exchanger, the second four-way commutating first end, the fourth end, and the third cut-off width, and finally Returning to the gas-liquid separator, entering the compressor from the compressor input;
In the second cycle, the second heat exchanger acts as a condenser and the third heat exchanger acts as an evaporator, and the first end of the second four-way commutation is in communication with the second end and the third end is in communication with the fourth end. The second share The refrigerant is switched from the second four-way to the second, first end of the wide end, and sequentially enters the second heat exchanger, the second electronic expansion wide, the third heat exchanger, and the third end of the second four-way commutation The fourth end and the third cut-off are wide, and then return to the gas-liquid separator, and finally enter the compressor from the compressor input end;
 When the multi-line system is in the heating condition, the first end of the first four-way reversing is connected to the fourth end, the second end is connected to the third end, the third electronic expansion is wide open, and the first electronic expansion is wide. And the second electronic expansion width respectively acts as a throttling;
 The first heat exchanger acts as an evaporator and the fourth heat exchanger acts as a condenser. The first refrigerant is commutated to the first end and the fourth end of the first through the first four-way, and sequentially enters the second cut-off width and the fourth change. The heat exchanger, the third electronic expansion wide, the fourth cut-off width, the first electronic expansion width and the first heat exchanger, and then reflowed to the second end of the first four-way reversing width, and the first four-way reversing The third end enters the gas-liquid separator, and finally enters the compressor from the input end of the compressor;
 The second refrigerant enters the second four-way commutating second end from the first cut-off output end; in the third cycle, the second heat exchanger acts as an evaporator and the third heat exchanger acts as a condenser The first end of the second four-way commutation is in communication with the fourth end, and the second end is in communication with the third end, and the second refrigerant is commutated from the second four-way to the second end of the second, through the second four-way Reversing the wide third end, sequentially entering the third heat exchanger, the second electronic expansion wide, the second heat exchanger, the second four-way commutating first end, the fourth end, and the third cut-off width, and finally Returning to the gas-liquid separator, and finally entering the compressor from the compressor input;
 In the fourth cycle, the second heat exchanger acts as a condenser and the third heat exchanger acts as an evaporator, and the first end of the second four-way commutation is in communication with the second end and the third end is in communication with the fourth end. The second refrigerant is switched from the second four-way to the second, first end of the wide end, and sequentially enters the second heat exchanger, the second electronic expansion wide, the third heat exchanger, and the second four-way commutation The third end, the fourth end and the third cut-off are wide, and then return to the gas-liquid separator, and finally enter the compressor from the compressor input end.
14. The system of claim 13 wherein:
 In the first cycle, the first wind width, the third wind width, the sixth wind width and the eighth wind width open, the second wind width, the fourth wind width, the fifth wind width and the seventh wind width are closed;
 The outdoor fresh air enters the first air chamber through the first wind through the fresh air passage, and exchanges heat and mass with the second heat exchanger. The high temperature and high humidity fresh air is cooled by the second heat exchanger, and the water vapor in the fresh air is The moisture absorbing material on the fins of the second heat exchanger is absorbed, and the fresh air is cooled and dehumidified, and then passed through the sixth wind width, and is sent into the room by the first air supply passage;
The indoor return air is passed through the first return air passage, enters the second air chamber through the third wind width, and the third heat exchanger The heat and mass transfer is performed, the low temperature and low humidity return air absorbs the heat of the third heat exchanger, the cooling amount in the return air is recovered, and the return air takes away the moisture absorbing material on the fin of the third heat exchanger in the second The moisture absorbed in the cycle, the air heated and humidified is discharged into the atmosphere through the exhaust duct through the eighth wind width;
 After a preset time, triggering the second four-way commutation to the wide commutation, entering the second cycle, the first wind width, the third wind width, the sixth wind width and the eighth wind width are closed, the second wind width , the fourth wide, the fifth wide and the seventh wide open;
 The fresh air enters the first air duct through the second air valve through the second air valve, and then enters the second air chamber to exchange heat and mass with the third heat exchanger, and the fresh air with high temperature and high humidity is cooled and cooled by the third heat exchanger, and The water vapor in the fresh air is absorbed by the moisture absorbing material on the fins of the third heat exchanger, and the fresh air is cooled and dehumidified, passes through the third air duct, passes through the fifth wind width, and finally is sent into the room through the first air supply passage;
 The indoor return air enters the second air duct from the first air return passage through the fourth wind, and then enters the first air chamber, and performs heat and mass transfer exchange with the second heat exchanger, and the second heat exchange of low temperature and low humidity return air absorption. The heat of the device is recovered, and the amount of cold in the return air is recovered, and the return air carries away the moisture absorbed by the moisture absorbing material on the fins of the second heat exchanger in the first cycle, and the heated humidified air passes through the fourth air duct. Then, the seventh wind is discharged into the atmosphere by the exhaust passage, and when the time set by the second cycle is reached, the trigger enters the first cycle, and the cycle is repeated.
15. The system of claim 13 wherein:
 In the third cycle, the first wind width, the third wind width, the sixth wind width and the eighth wind width are closed, the second wind width, the fourth wind width, the fifth wind width and the seventh wind width open;
 The fresh air enters the first air duct through the second air valve through the second air valve, and then enters the second air chamber to exchange heat and mass with the third heat exchanger, and the fresh air with low temperature and low humidity is heated by the heat of the third heat exchanger. The dry fresh air absorbs the moisture absorbed by the moisture absorbing material on the fins of the third heat exchanger in the fourth cycle, the fresh air is heated and humidified, passes through the third air duct, passes through the fifth wind width, and finally passes the first air supply. The channel is sent indoors;
 The indoor return air enters the second air duct from the first air return passage through the fourth wind width, and then enters the first air chamber, and exchanges heat and mass with the second heat exchanger, and the return air of high temperature and high humidity is replaced by the second air. The low temperature refrigerant in the heater cools down, the heat in the return air is recovered, and the water vapor in the return air is absorbed by the moisture absorbing material on the fins of the second heat exchanger, and the air cooled and dehumidified passes through the fourth air duct, and then The seventh wind is discharged into the atmosphere by the exhaust passage;
After the preset time, the second four-way is changed to the wide commutation, and the trigger enters the fourth cycle. The first wind width, the third wind width, the sixth wind width and the eighth wind width open, the second wind is wide, Fourth wind Wide, fifth wide and seventh wide open;
 The outdoor fresh air enters the first air chamber through the first wind through the fresh air passage, and exchanges heat and mass with the second heat exchanger. The fresh air with low temperature and low humidity is heated by the heat of the second heat exchanger, and the fresh air absorption is dry. The moisture absorbed by the moisture absorbing material on the fins of the two heat exchangers is absorbed and humidified in the previous cycle, and the fresh air is heated and humidified, and then passed through the sixth air vent, and is sent into the room by the first air supply passage;
 The indoor return air enters the second air chamber through the first air return passage through the third wind tunnel, and performs heat and mass transfer exchange with the third heat exchanger, and the high temperature and high humidity return air is cooled by the low temperature refrigerant in the third heat exchanger. The heat in the return air is recovered, and the water vapor in the return air is absorbed by the moisture absorbing material on the fins of the third heat exchanger, and the air cooled and dehumidified is discharged into the atmosphere through the exhaust air passage through the eighth wind width. When the time set by the fourth cycle is over, the trigger enters the third cycle, and the cycle is repeated.
16. The system according to claim 7, wherein the outdoor unit further comprises:
 a heat exchanger, wherein the first end of the heat exchanger is respectively connected to the input end of the gas-liquid separator and the third end of the first four-way reversing, the second end of the heat exchanger and the output end of the first electronic expansion Connected, the third end of the heat exchanger is connected to the fourth cut-off input, and the third end of the heat exchanger is connected to the third cut-off input.
17. The system of claim 6 wherein:
 The first air chamber unit further includes: a first wind width, a second wind width, a fifth wind width, a sixth wind width, a first air duct, and a third air duct, wherein
 A new air passage is opened at one end of the inner wall of the first air chamber, and a first air supply passage is opened at the other end of the inner wall, and a first air valve and a first air valve are disposed at a side of the inner wall of the fresh air passage leading to the first air supply passage and close to the fresh air passage. a second damper, wherein the first air supply passage leads to the fresh air passage and is adjacent to the other end of the inner wall of the first air supply passage, and has a fifth wind width and a sixth wind width; and in the first wind chamber, a second change is set Heater
 a first duct connecting the first wind gap to the second air chamber unit, and a first wind connecting the second air chamber unit to the second air chamber unit at a junction of the first air chamber and the second air chamber The third air duct unit further includes: a third wind width, a fourth wind width, a seventh wind width, an eighth wind width, a second air duct, a fourth air duct, and a second four-way commutation Broad and the second electronic expansion is wide, among them,
a second return air passage is opened at one end of the inner wall of the second air chamber and the first air chamber, and the inner wall is another The end opening is provided with an exhaust passage, and at the end of the inner wall of the first return air passage leading to the exhaust passage and close to the first return air passage, a third wind width and a fourth wind width are arranged, and the exhaust passage leads to the first The return air passage is adjacent to the other end of the inner wall of the exhaust passage, and is provided with a seventh wind width and an eighth wind width; in the second wind chamber, a second four-way commutation width, a second electronic expansion width, and a third a heat exchanger; at a junction of the first air chamber and the second air chamber, a second air duct connecting the third air gap to the first air chamber, and connecting the eighth air gap to the first air chamber The fourth duct.
18. A method of controlling temperature and humidity in a multi-connected air conditioning system, the method comprising: converging a first refrigerant input by a switching unit of an outdoor unit and a second refrigerant input to a third end of the outdoor unit, by a splitting unit After compression, splitting, respectively outputting the first refrigerant and the second refrigerant;
 Passing the second refrigerant outputted by the flow dividing unit to the first end of the indoor unit through the first end of the outdoor unit, sequentially flowing through the second condenser of the indoor unit and the second evaporator, and from the third of the indoor unit The end flows out and flows back to the diverting unit through the third end of the outdoor unit;
 The first refrigerant outputted by the flow dividing unit is switched, sequentially flows through the first condenser, the first evaporator, and enters the flow dividing unit.
The method according to claim 18, wherein the switching the first refrigerant outputted by the flow dividing unit to sequentially flow through the first condenser, the first evaporator, and entering the flow dividing unit comprises:
 When the multi-connected air conditioning system is in a cooling condition, the first heat exchanger in the outdoor unit is controlled as the first evaporator, and the fourth heat exchanger in the indoor unit is used as the first evaporator;
 The first refrigerant outputted by the flow dividing unit is switched and flows through the first heat exchanger, and is output to the fourth end of the indoor unit through the fourth end of the outdoor unit, and passes through the fourth heat exchanger of the indoor unit, and is The second end of the machine returns to the second end of the outdoor unit, and enters the diverting unit through the second end of the outdoor unit;
 When the multi-connected air conditioning system is in a heating condition, the first heat exchanger in the outdoor unit is controlled as the first evaporator, and the fourth heat exchanger in the indoor unit is used as the first condenser;
 Switching the first refrigerant to the second end of the indoor unit via the second end, flowing through the fourth heat exchanger through the second end of the indoor unit, flowing out through the fourth end of the indoor unit, and flowing into the outdoor unit The four ends pass through the first heat exchanger through the fourth end of the outdoor unit, and then flow back to the splitting unit.
20. The method according to claim 19, wherein The outdoor unit includes: compressor, one-way wide, first four-way reversing wide, first heat exchanger, first electronic expansion wide, gas-liquid separator, first cut-off width, second cut-off width, third cut-off width And the fourth limit is wide;
 The indoor unit includes: a fresh air passage, a first return air passage, a second return air passage, a first air supply passage, an exhaust air passage, a second air supply passage, a first air chamber, a second air chamber, a third air chamber, The first wind width, the second wind width, the third wind width, the fourth wind width, the fifth wind width, the sixth wind width, the seventh wind width, the eighth wind width, the first air duct, the second air duct, a third air duct, a fourth air duct, a second four-way commutation wide, a second heat exchanger, a second electronic expansion wide, a third heat exchanger, a third electronic expansion wide, and a fourth heat exchanger;
 The refrigerant is discharged from the output end of the compressor into a one-way wide, and the high-pressure refrigerant gas which is unidirectionally wide is divided into a first refrigerant and a second refrigerant, and the first refrigerant enters the switching unit. The first four-way reversing the first end of the wide, the second refrigerant enters the first cut-off width of the first end of the outdoor unit, and is output to the indoor unit via the first cut-off;
 When the multi-connected air conditioning system is in a cooling condition, the first end of the first four-way commutation is connected to the second end, and the third end is connected to the fourth end, and the first liquid supply of the evaporator is adjusted according to a preset procedure. The electronic expansion is wide open, the second electronic expansion is wide, and the third electronic expansion is wide to regulate the flow of the refrigerant; the first heat exchanger acts as a condenser and the fourth heat exchanger acts as an evaporator, and the first refrigerant is a four-way reversing wide second end, sequentially entering the first heat exchanger, the first electronic expansion wide, the fourth cut wide, the third electronic expansion wide, the fourth heat exchanger and the second cut-off width, and then flowing back to The first four-way reversing the wide fourth end, entering the gas-liquid separator via the first four-way commutating third end, and finally entering the compressor from the compressor input end;
 The second refrigerant enters the second four-way commutating second end from the first cut-off output end; in the first cycle, the second heat exchanger acts as an evaporator and the third heat exchanger acts as a condenser The first wide, the third wide, the sixth wide and the eighth wide open, the second wide, the fourth wide, the fifth wide and the seventh wide open;
 The first end of the second four-way commutation is in communication with the fourth end, and the second end is in communication with the third end, and the second refrigerant is commutated from the second four-way to the second end of the second, through the second four-way Reversing the wide third end, sequentially entering the third heat exchanger, the second electronic expansion wide, the second heat exchanger, the second four-way commutating first end, the fourth end, and the third cut-off width, and finally Returning to the gas-liquid separator, entering the compressor from the compressor input;
In the second cycle, the second heat exchanger acts as a condenser and the third heat exchanger acts as an evaporator, and the first wind width, the third wind width, the sixth wind width, and the eighth wind width are closed, and the second wind width is wide. The fourth is wide, The fifth wind width and the seventh wind width open;
 The first end of the second four-way reversing direction is in communication with the second end, and the third end is in communication with the fourth end, and the second refrigerant is switched from the second four-way to the second end of the second end, the first end, in turn Entering the second heat exchanger, the second electronic expansion wide, the third heat exchanger, the third end of the second four-way commutation, the fourth end, and the third cut-off width, and then returning to the gas-liquid separator, and finally The compressor input enters the compressor;
 When the multi-line system is in the heating condition, the first end of the first four-way reversing is connected to the fourth end, the second end is connected to the third end, the third electronic expansion is wide open, and the first electronic expansion is wide. And the second electronic expansion width respectively acts as a throttling;
 The first heat exchanger acts as an evaporator and the fourth heat exchanger acts as a condenser. The first refrigerant is commutated to the first end and the fourth end of the first through the first four-way, and sequentially enters the second cut-off width and the fourth change. The heat exchanger, the third electronic expansion wide, the fourth cut-off width, the first electronic expansion width and the first heat exchanger, and then reflowed to the second end of the first four-way reversing width, and the first four-way reversing The third end enters the gas-liquid separator, and finally enters the compressor from the input end of the compressor;
 The second refrigerant enters the second four-way commutating second end from the first cut-off output end; in the third cycle, the second heat exchanger acts as an evaporator and the third heat exchanger acts as a condenser The first wind width, the third wind width, the sixth wind width and the eighth wind width are closed, the second wind width, the fourth wind width, the fifth wind width and the seventh wind width open;
 The first end of the second four-way commutation is in communication with the fourth end, and the second end is in communication with the third end, and the second refrigerant is commutated from the second four-way to the second end of the second, through the second four-way Reversing the wide third end, sequentially entering the third heat exchanger, the second electronic expansion wide, the second heat exchanger, the second four-way commutating first end, the fourth end, and the third cut-off width, and finally Returning to the gas-liquid separator, and finally entering the compressor from the compressor input;
 In the fourth cycle, the second heat exchanger acts as a condenser and the third heat exchanger acts as an evaporator, and the first wind width, the third wind width, the sixth wind width, and the eighth wind width open, the second wind is wide, The fourth wind width, the fifth wind width and the seventh wind width are closed;
 The first end of the second four-way reversing direction is in communication with the second end, and the third end is in communication with the fourth end, and the second refrigerant is switched from the second four-way to the second end of the wide end, the first end, in turn Entering the second heat exchanger, the second electronic expansion wide, the third heat exchanger, the third end of the second four-way commutation, the fourth end, and the third cut-off width, and then returning to the gas-liquid separator, and finally The compressor input enters the compressor.
PCT/CN2012/082962 2012-09-20 2012-10-15 Method for controlling temperature and humidity in a multi air-conditioning system and multi air conditioning system WO2014043951A1 (en)

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