CN218915106U

CN218915106U - Air conditioner system

Info

Publication number: CN218915106U
Application number: CN202223013802.5U
Authority: CN
Inventors: 刘群波; 许克; 李彬
Original assignee: GD Midea Air Conditioning Equipment Co Ltd
Current assignee: GD Midea Air Conditioning Equipment Co Ltd
Priority date: 2022-11-11
Filing date: 2022-11-11
Publication date: 2023-04-25
Anticipated expiration: 2032-11-11

Abstract

The utility model provides an air conditioner system, which comprises an outdoor heat exchanger, a compressor, an indoor heat exchange assembly and a switching element; the indoor heat exchange assembly comprises a first indoor heat exchanger and a second indoor heat exchanger, wherein a second refrigerant interface of the first indoor heat exchanger is communicated with a first refrigerant interface of the second indoor heat exchanger and is communicated with one refrigerant interface of the outdoor heat exchanger through a first throttling element; the switching element is formed with at least five interfaces, and at least five interfaces include a first interface, a second interface, a third interface, a fourth interface and a fifth interface, and respectively correspond to and connect the exhaust port, the first refrigerant interface of the first indoor heat exchanger, the second refrigerant interface of the second indoor heat exchanger, the air return port and the other refrigerant interface of the outdoor heat exchanger, and the switching element can switch the positions and/or the numbers of the adjacent interfaces to be communicated, so that the air conditioner system can have a reheat dehumidification mode, a refrigeration mode and a heating mode.

Description

Air conditioner system

Technical Field

The utility model relates to the technical field of household appliances, in particular to an air conditioner system.

Background

The conventional air conditioner dehumidification mode is the same as the refrigeration mode, and the aim of dehumidification is achieved by controlling the evaporator to refrigerate and enable the temperature of the air to be lower than the dew point of air and cooling and absorbing moisture when the air passes through the low-temperature evaporator; the dehumidification and reheating technology is adopted, so that dehumidified air is heated by a reheating heat exchanger, a dehumidification and reheating function is realized, and dehumidification is ensured not to be cooled; however, in the existing three-pipe system scheme, two four-way valves or a mode that one four-way valve is overlapped with two electromagnetic valves are adopted, system pipelines are complex, control ports are increased, and the cost of the whole machine is increased.

Disclosure of Invention

The utility model mainly aims to provide an air conditioner system, which aims to solve the problems of complex control system and higher overall cost caused by complex pipelines and more control ports of the existing dehumidification system.

To achieve the above object, the present utility model provides an air conditioner system comprising:

an outdoor heat exchanger;

a compressor having a return air port and an exhaust air port;

the indoor heat exchange assembly comprises at least two indoor heat exchangers, each indoor heat exchanger is provided with a first refrigerant interface and a second refrigerant interface, the at least two indoor heat exchangers comprise a first indoor heat exchanger and a second indoor heat exchanger, and the second refrigerant interface of the first indoor heat exchanger is communicated with the first refrigerant interface of the second indoor heat exchanger and is communicated with one refrigerant interface of the outdoor heat exchanger through a first throttling element; the method comprises the steps of,

the switching element is formed with at least five interfaces, the at least five interfaces comprise a first interface, a second interface, a third interface, a fourth interface and a fifth interface, the first interface, the second interface, the third interface, the fourth interface and the fifth interface are respectively and correspondingly connected with the exhaust port, the first refrigerant interface of the first indoor heat exchanger, the second refrigerant interface of the second indoor heat exchanger, the air return port and the other refrigerant interface of the outdoor heat exchanger, and the switching element can switch the positions and/or the numbers of the adjacent interfaces communicated so that the air conditioner system can have a reheat dehumidification mode, a refrigeration mode and a heating mode.

Optionally, in the reheat dehumidification mode, the switching element switches to a state in which the first interface, the second interface, and the fifth interface are in communication, and the third interface and the fourth interface are in communication; and/or the number of the groups of groups,

in the refrigeration mode, the switching element is switched to a state that the second interface, the third interface and the fourth interface are communicated, and the first interface is communicated with the fifth interface; and/or the number of the groups of groups,

in the heating mode, the switching element is switched to a state in which the first interface, the second interface and the third interface are communicated, and the fourth interface and the fifth interface are communicated.

Optionally, the switching element comprises a five-way valve.

Optionally, a first stop valve is arranged between the second interface and the first refrigerant interface of the first indoor heat exchanger; and/or the number of the groups of groups,

a second stop valve is arranged between the third interface and a second refrigerant interface of the second indoor heat exchanger; and/or the number of the groups of groups,

a third stop valve is arranged between the fifth interface and the other refrigerant interface of the outdoor heat exchanger.

Optionally, a second throttling element is arranged between the junction of the second refrigerant interface of the first indoor heat exchanger and the first refrigerant interface of the second indoor heat exchanger and the second refrigerant interface of the first indoor heat exchanger, and a third throttling element is arranged between the junction of the second refrigerant interface of the first indoor heat exchanger and the first refrigerant interface of the second indoor heat exchanger;

one of the refrigerant interfaces of the outdoor heat exchanger is connected between the second throttling element and the third throttling element.

Optionally, a gas-liquid separator is arranged at the air return port of the compressor.

Optionally, the first heat exchanger and the second heat exchanger are formed with a heat exchanger group, and the heat exchanger group is provided with a plurality of heat exchangers.

Optionally, a third indoor heat exchanger is further included, and the third indoor heat exchanger is arranged in parallel with the second indoor heat exchanger.

Optionally, a fourth throttling element is arranged at the first refrigerant interface of the third indoor heat exchanger.

Optionally, the air conditioner system further comprises an outdoor fan, and the outdoor fan is arranged corresponding to the outdoor heat exchanger.

The utility model provides an air conditioner system, which comprises an outdoor heat exchanger, a compressor, an indoor heat exchange assembly and a switching element; the compressor is provided with a return air port and an exhaust port, the indoor heat exchange assembly comprises a first indoor heat exchanger and a second indoor heat exchanger, a second refrigerant interface of the first indoor heat exchanger is communicated with a first refrigerant interface of the second indoor heat exchanger, and is communicated with one refrigerant interface of the outdoor heat exchanger through a first throttling element; the switching element comprises a first interface, a second interface, a third interface, a fourth interface and a fifth interface, and is correspondingly connected with the exhaust port, a first refrigerant interface of the first indoor heat exchanger, a second refrigerant interface of the second indoor heat exchanger, the air return port and another refrigerant interface of the outdoor heat exchanger respectively; the switching element can switch the positions and/or the numbers of the communication between the adjacent interfaces when the air conditioner system is respectively in the reheating and dehumidifying mode, the refrigerating mode and the heating mode; therefore, by arranging one switching element, the air conditioner system can be provided with different refrigerant flow paths corresponding to the reheating dehumidification mode, the refrigerating mode and the heating mode respectively, the number of components can be reduced, the system pipelines are simplified, the control ports are reduced, the control system of the air conditioner system is simplified, and the cost of the whole machine is reduced.

Drawings

In order to more clearly illustrate the embodiments of the present utility model or the technical solutions in the prior art, the drawings that are required in the embodiments or the description of the prior art will be briefly described, and it is obvious that the drawings in the following description are only some embodiments of the present utility model, and other drawings may be obtained according to the structures shown in these drawings without inventive effort for a person skilled in the art.

FIG. 1 is a schematic diagram of an embodiment of an air conditioner system according to the present utility model;

FIG. 2 is a schematic illustration of the air conditioner system of FIG. 1 in a reheat dehumidification mode;

FIG. 3 is a schematic diagram of the air conditioner system of FIG. 1 in a cooling mode;

fig. 4 is a schematic view of the air conditioner system of fig. 1 in a heating mode.

Reference numerals illustrate:

the achievement of the objects, functional features and advantages of the present utility model will be further described with reference to the accompanying drawings, in conjunction with the embodiments.

Detailed Description

The following description of the embodiments of the present utility model will be made clearly and fully with reference to the accompanying drawings, in which it is evident that the embodiments described are only some, but not all embodiments of the utility model. All other embodiments, which can be made by those skilled in the art based on the embodiments of the utility model without making any inventive effort, are intended to be within the scope of the utility model.

In the case where a directional instruction is involved in the embodiment of the present utility model, the directional instruction is merely used to explain the relative positional relationship, movement condition, etc. between the components in a specific posture, and if the specific posture is changed, the directional instruction is changed accordingly.

In addition, if there is a description of "first", "second", etc. in the embodiments of the present utility model, the description of "first", "second", etc. is for descriptive purposes only and is not to be construed as indicating or implying a relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defining "a first" or "a second" may explicitly or implicitly include at least one such feature. In addition, the meaning of "and/or" as it appears throughout includes three parallel schemes, for example "A and/or B", including the A scheme, or the B scheme, or the scheme where A and B are satisfied simultaneously. Also, the technical solutions of the embodiments may be combined with each other, but it is necessary to base the implementation on the basis of those skilled in the art, and when the technical solutions are contradictory or cannot be implemented, it should be considered that the combination of the technical solutions does not exist and is not within the scope of protection claimed by the present utility model.

The conventional air conditioner dehumidification mode is the same as the refrigeration mode, and the aim of dehumidification is achieved by controlling the evaporator to refrigerate and enable the temperature of the air to be lower than the dew point of air and cooling and absorbing moisture when the air passes through the low-temperature evaporator; the dehumidification and reheating technology is adopted, so that dehumidified air is heated by a reheating heat exchanger, a dehumidification and reheating function is realized, and dehumidification is ensured not to be cooled; however, in the existing three-pipe system scheme, two four-way valves or one four-way valve plus 2 electromagnetic valves are adopted, so that the system pipeline is complex, the control ports are increased, and the cost of the whole machine is increased.

In view of this, the present utility model provides an air conditioner system, which aims to solve the problems of complex control system and high overall cost caused by complex pipelines and more control ports in the existing dehumidification system. Fig. 1 to 4 are schematic views showing an embodiment of an air conditioner system according to the present utility model.

Referring to fig. 1, the air conditioner system 100 includes an outdoor heat exchanger 1, a compressor 2, an indoor heat exchange assembly 3, and a switching element 4; the compressor 2 has a return port 21 and a discharge port 22; the indoor heat exchange assembly 3 comprises at least two indoor heat exchangers, each indoor heat exchanger is provided with a first refrigerant interface and a second refrigerant interface, the at least two indoor heat exchangers comprise a first indoor heat exchanger 31 and a second indoor heat exchanger 32, the second refrigerant interface of the first indoor heat exchanger 31 is communicated with the first refrigerant interface of the second indoor heat exchanger 32, and is communicated with one refrigerant interface of the outdoor heat exchanger 1 through a first throttling element 33; the switching element 4 is formed with at least five interfaces including a first interface, a second interface, a third interface, a fourth interface, and a fifth interface, the first interface, the second interface, the third interface, the fourth interface, and the fifth interface are respectively and correspondingly connected to the exhaust port 22, the first refrigerant interface of the first indoor heat exchanger 31, the second refrigerant interface of the second indoor heat exchanger 32, the return air port 21, and the other refrigerant interface of the outdoor heat exchanger 1, and the switching element 4 can switch positions and/or numbers of adjacent interface communication so that the air conditioner system 100 can have a dehumidification mode, a refrigeration mode, and a heating mode.

The utility model provides an air conditioner system 100, which comprises an outdoor heat exchanger 1, a compressor 2, an indoor heat exchange assembly 3 and a switching element 4; the compressor 2 has a return port 21 and an exhaust port 22, the indoor heat exchange assembly 3 includes a first indoor heat exchanger 31 and a second indoor heat exchanger 32, the second refrigerant interface of the first indoor heat exchanger 31 is communicated with the first refrigerant interface of the second indoor heat exchanger 32, and is communicated with one of the refrigerant interfaces of the outdoor heat exchanger 1 through a first throttling element 33; the switching element 4 includes a first interface, a second interface, a third interface, a fourth interface, and a fifth interface sequentially disposed along a circumferential direction thereof, and is respectively and correspondingly connected to the exhaust port 22, the first refrigerant interface of the first indoor heat exchanger 31, the second refrigerant interface of the second indoor heat exchanger 32, the return port 21, and the other refrigerant interface of the outdoor heat exchanger 1; the switching element 4 is capable of switching the position and/or the number of communication adjacent to the interface when the air conditioner system 100 is in the reheat dehumidification mode, the cooling mode, and the heating mode, respectively; therefore, by providing one switching element 4, the air conditioner system 100 can have different refrigerant flow paths corresponding to the reheat dehumidification mode, the cooling mode and the heating mode respectively, so that the number of components can be reduced, the system pipelines can be simplified, the control ports can be reduced, the control system of the air conditioner system 100 can be simplified, and the cost of the whole machine can be reduced.

It is understood that dehumidification refers to the process of cooling and dehumidifying air in which the refrigerant is below the dew point temperature of the air before passing through the heat exchanger. Reheat refers to the process that the temperature of the refrigerant is higher than the temperature of the air before flowing through the heat exchanger, and the temperature of the air is raised and reheated.

Referring to fig. 2, when the air conditioner system 100 is in the reheat dehumidification mode, the switching element 4 is switched to a state in which the first interface, the second interface and the fifth interface are communicated, and the third interface and the fourth interface are communicated; at this time, the first indoor heat exchanger 31 and the second indoor heat exchanger 32 are formed as reheat heat exchangers and dehumidification heat exchangers, respectively, and the outdoor heat exchanger 1 is formed as a condenser; the high-temperature high-pressure gaseous refrigerant flows from the exhaust port 22 of the compressor 2 to the switching element 4, flows through the second interface and the fifth interface respectively, flows to the first refrigerant interface of the first indoor heat exchanger 31 and the other refrigerant interface of the outdoor heat exchanger 1 respectively, and part of the high-temperature high-pressure gaseous refrigerant flows through the first indoor heat exchanger 31, at this time, the temperature of the high-temperature high-pressure gaseous refrigerant is higher than the temperature of air before flowing through the first indoor heat exchanger 31, the heat exchange (heat release process) is performed between the high-temperature high-pressure gaseous refrigerant and the indoor air, the temperature rising and reheating treatment is performed on the indoor air, and the high-temperature high-pressure gaseous refrigerant is liquefied into a low-temperature liquid refrigerant; meanwhile, the other part of the high-temperature high-pressure gaseous refrigerant flows through the outdoor heat exchanger 1, and performs heat exchange (heat release process) with the outdoor air, so that the high-temperature high-pressure liquid refrigerant is liquefied into a medium-temperature high-pressure liquid refrigerant, and the medium-temperature high-pressure liquid refrigerant is throttled and depressurized through the first throttling element 33 to be depressurized into a low-temperature low-pressure liquid refrigerant; after the liquid refrigerant flowing through the first indoor heat exchanger 31 and the liquid refrigerant flowing through the outdoor heat exchanger 1 are combined, the liquid refrigerant flows to the second indoor heat exchanger 32, at this time, the temperature of the liquid refrigerant is lower than the dew point temperature of the air before flowing through the second indoor heat exchanger 32, the liquid refrigerant exchanges heat with the indoor air (heat absorption process), the air is cooled and dehumidified, the vaporized air becomes a gaseous refrigerant, and the gaseous refrigerant sequentially flows through the third interface and the fourth interface and flows back to the air return port 21 of the compressor 2.

Referring to fig. 3, when the air conditioner system 100 is in the cooling mode, the switching element 4 is switched to a state in which the second interface, the third interface, and the fourth interface are in communication, and the first interface is in communication with the fifth interface; at this time, the outdoor heat exchanger 1 is formed as a condenser, and the first indoor heat exchanger 31 and the second indoor heat exchanger 32 are respectively formed as evaporators; the high-temperature and high-pressure gaseous refrigerant flows from the exhaust port 22 of the compressor 2 to the switching element 4, flows through the fifth interface and flows to the other refrigerant interface of the outdoor heat exchanger 1, flows through the outdoor heat exchanger 1 and performs heat exchange (heat release process) with outdoor air, is liquefied to become a medium-temperature and high-pressure liquid refrigerant, and flows through the first throttling element 33 to be throttled and depressurized to become a low-temperature and low-pressure liquid refrigerant, and the low-temperature and low-pressure liquid refrigerant respectively flows to the first indoor heat exchanger 31 and the second indoor heat exchanger 32, is vaporized to become a low-pressure gaseous refrigerant after being vaporized and absorbed by heat in the first indoor heat exchanger 31 and the second indoor heat exchanger 32, and then the fan blows cool indoor air to cool indoor refrigeration.

Referring to fig. 4, when the air conditioner system 100 is in the heating mode, the switching element 4 is switched to a state in which the first interface, the second interface, and the third interface are connected, and the fourth interface and the fifth interface are connected; at this time, the first indoor heat exchanger 31 and the second indoor heat exchanger 32 are respectively formed as condensers, and the outdoor heat exchanger 1 is formed as an evaporator; the high-temperature and high-pressure gaseous refrigerant flows from the exhaust port 22 of the compressor 2 to the switching element 4, flows through the second interface and the third interface, flows to the first refrigerant interface of the first indoor heat exchanger 31 and the second refrigerant interface of the second indoor heat exchanger 32, flows through the first indoor heat exchanger 31 and the second indoor heat exchanger 32 respectively, performs heat exchange (heat release process) with indoor air, liquefies to become a medium-temperature and high-pressure liquid refrigerant, and then the fan blows warm air into the room, heats the room, and flows to the outdoor heat exchanger 1 after merging the medium-temperature and high-pressure liquid refrigerant flowing out of the first indoor heat exchanger 31 and the second indoor heat exchanger 32, and is vaporized to become a low-temperature gas refrigerant after evaporating and absorbing heat through the outdoor heat exchanger 1, and the low-temperature gas refrigerant flowing out of the outdoor heat exchanger 1 flows through the fifth interface and the fourth interface in turn due to the communication of the fourth interface, and flows back to the fourth interface 21 from the air inlet of the fourth interface 2.

It should be noted that, the conventional air conditioner system 100 generally has a dehumidification reheat mode, a cooling mode and a heating mode, and a user can adjust the air conditioner to a proper mode according to actual requirements.

The present utility model is not limited to the specific form of the switching element 4, and in this embodiment, the switching element 4 includes the five-way valve 41, so that the structure is simple, the arrangement of components is reduced, the cost is reduced, and the control system can be simplified.

In the present utility model, a first stop valve 5 is disposed between the second port and the first refrigerant port of the first indoor heat exchanger 31; the first stop valve 5 may be a simple switch valve, and the on-off between the second interface and the first refrigerant interface of the first indoor heat exchanger 31 is adjusted by setting the first stop valve 5.

In the present utility model, a second stop valve 6 is disposed between the third port and a second refrigerant port of the second indoor heat exchanger 32; the second stop valve 6 may be a simple switch valve, and the second stop valve 6 is provided to adjust the on-off between the third interface and the second refrigerant interface of the second indoor heat exchanger 32.

In the present utility model, a third stop valve 7 is disposed between the fifth interface and the other refrigerant interface of the outdoor heat exchanger 1; the third stop valve 7 may be a simple switch valve, and the on-off between the fifth interface and the other refrigerant interface of the outdoor heat exchanger 1 is adjusted by setting the third stop valve 7.

It should be noted that the above three technical features may be alternatively set, or may be set simultaneously, and specifically, in this embodiment, the above three technical features are set simultaneously, that is, a first stop valve 5 is disposed between the second interface and the first refrigerant interface of the first indoor heat exchanger 31; a second stop valve 6 is arranged between the third interface and a second refrigerant interface of the second indoor heat exchanger 32; a third stop valve 7 is arranged between the fifth interface and the other refrigerant interface of the outdoor heat exchanger 1; the first stop valve 5, the second stop valve 6 and the third stop valve 7 may be all simple on-off valves, so as to correspondingly adjust on-off between the second interface and the first refrigerant interface of the first indoor heat exchanger 31, between the third interface and the second refrigerant interface of the second indoor heat exchanger 32, and between the fifth interface and the other refrigerant interface of the outdoor heat exchanger 1.

The present utility model is not limited to the specific form of the first stop valve 5, the second stop valve 6, and the third stop valve 7, and in this embodiment, in order to further improve the utility of the first stop valve 5, the second stop valve 6, and the third stop valve 7, the first stop valve 5 is set as a high-low pressure stop valve; setting the second stop valve 6 as a gas pipeline stop valve; the third shut-off valve 7 is provided as a liquid line shut-off valve.

Referring to fig. 2 to 4, a second throttling element 34 is disposed between the junction of the second refrigerant interface of the first indoor heat exchanger 31 and the first refrigerant interface of the second indoor heat exchanger 32 and the second refrigerant interface of the first indoor heat exchanger 31, and a third throttling element 35 is disposed between the junction of the second refrigerant interface of the first indoor heat exchanger 31 and the first refrigerant interface of the second indoor heat exchanger 32; one of the refrigerant interfaces of the outdoor heat exchanger 1 is connected between the second throttling element 34 and the third throttling element 35; that is, the refrigerant pressure at the second refrigerant interface of the first indoor heat exchanger 31 and the first refrigerant interface of the second indoor heat exchanger 32 can be adjusted by the second throttling element 34 and the third throttling element 35; in the reheating and dehumidification mode of the air conditioner system 100, the high-temperature and high-pressure gaseous refrigerant flows through the first indoor heat exchanger 31, is liquefied into a middle-temperature and high-pressure liquid refrigerant, and is throttled and depressurized by the second throttling element 34 to become a low-temperature and low-pressure liquid refrigerant, at this time, after passing through the first throttling element 33, part of the high-temperature and high-pressure gaseous refrigerant flowing through the outdoor heat exchanger 1 is depressurized into a low-temperature and low-pressure liquid refrigerant, so that two parts of the low-temperature and low-pressure liquid refrigerant flowing out of the first indoor heat exchanger 31 and the outdoor heat exchanger 1 can be smoothly combined; in the cooling mode of the air conditioner system 100, the high-temperature and high-pressure gaseous refrigerant flows through the outdoor heat exchanger 1 and the first throttling element 33, is liquefied and depressurized to become a low-temperature and low-pressure gas-liquid mixture (more liquid), and the low-temperature and low-pressure gas-liquid mixture (more liquid) flows through the second throttling element 34 and the third throttling element 35, is further throttled and depressurized to become a low-temperature and low-pressure liquid refrigerant, and then flows through the first indoor heat exchanger 31 and the second indoor heat exchanger 32; in the heating mode of the air conditioner system 100, the high-temperature and high-pressure gaseous refrigerant is liquefied after flowing through the first indoor heat exchanger 31 and the second indoor heat exchanger 32 to become a medium-temperature and high-pressure liquid refrigerant, and the medium-temperature and high-pressure liquid refrigerant flowing out of the first indoor heat exchanger 31 and the second indoor heat exchanger 32 is liquefied and depressurized by the second throttling element 34 and the third throttling element 35, respectively, and then becomes a low-temperature and low-pressure gas-liquid mixture (more liquid), and then flows to the first throttling element 33.

The compressor 2 (compressor) is a driven fluid machine that lifts low-pressure gas to high-pressure gas, and is a heart of a refrigeration system. The low-temperature low-pressure gaseous refrigerant is sucked from the air return port 21, the piston is driven to compress the low-temperature low-pressure gaseous refrigerant by the operation of the motor, and then the high-temperature high-pressure gaseous refrigerant is discharged to the air outlet 22 to provide power for the refrigeration cycle, so that the refrigeration cycle of compression, condensation (heat release), expansion and evaporation (heat absorption) is realized, and in the embodiment, no matter in the reheat dehumidification mode, the refrigeration mode or the heating mode, the refrigerant flowing back to the air return port 21 from the fourth port is completely gaseous, and when the liquid refrigerant flows into the compressor 2, the interior of the compressor 2 is damaged due to corrosion and oxidation; meanwhile, since the liquid refrigerant is not compressed, the liquid refrigerant occupies the internal space of the compressor 2, thereby reducing the power efficiency of the compressor 2; thus, in the present embodiment, a gas-liquid separator 8 is provided at the return air port 21 of the compressor 2; the gas-liquid separator 8 is provided in the return air port 21 of the compressor 2 to reduce the liquid contained in the gaseous refrigerant entering the compressor 2, so that the damage of the inside of the compressor 2 due to corrosion and oxidation can be avoided, and the power efficiency of the compressor 2 can be improved.

In one embodiment, the first heat exchanger and the second heat exchanger form a heat exchanger group, and a plurality of heat exchanger groups are arranged; by providing a plurality of heat exchanger groups, the operating efficiency of the air conditioner system 100 is improved.

In one embodiment, the air conditioner system 100 further includes a third indoor heat exchanger 36, the third indoor heat exchanger 36 being disposed in parallel with the second indoor heat exchanger 32; in the reheat dehumidification mode, the third indoor heat exchanger 36 is formed as a dehumidification heat exchanger; in the cooling mode, the third indoor heat exchanger 36 is formed as an evaporator; in the heating mode, the third indoor heat exchanger 36 is formed as a condenser.

Specifically, a fourth throttling element 37 is disposed at the first refrigerant interface of the third indoor heat exchanger 36; the fourth throttling element 37 can adjust the refrigerant pressure at the first refrigerant interface of the third indoor heat exchanger 36.

In the present utility model, the air conditioner system 100 further includes an outdoor fan 9, where the outdoor fan 9 is disposed corresponding to the outdoor heat exchanger 1, and the heat dissipation capability of the outdoor heat exchanger 1 is improved by using the outdoor fan 9 in this scheme.

Based on the above features, the specific operation principle of the first embodiment of the fresh air device 100 provided by the present utility model is as follows:

in the reheat dehumidification mode of the air conditioner system 100, the switching element 4 switches the first, second and fifth interfaces to communicate, the third and fourth interfaces to communicate; at this time, the first indoor heat exchanger 31 is formed as a reheat heat exchanger, the second indoor heat exchanger 32 and the third indoor heat exchanger 36 are formed as dehumidification heat exchangers, and the outdoor heat exchanger 1 is formed as a condenser; the high-temperature high-pressure gaseous refrigerant flows from the exhaust port 22 of the compressor 2 to the switching element 4, flows through the second interface and the fifth interface respectively, flows to the first refrigerant interface of the first indoor heat exchanger 31 and the other refrigerant interface of the outdoor heat exchanger 1 respectively, part of the high-temperature high-pressure gaseous refrigerant flows to the first indoor heat exchanger 31, at this time, the temperature of the high-temperature high-pressure gaseous refrigerant is higher than the temperature of air before flowing through the first indoor heat exchanger 31, the high-temperature high-pressure gaseous refrigerant exchanges heat with indoor air (heat release process), the indoor air is subjected to heating and reheating treatment, the high-temperature high-pressure gaseous refrigerant is liquefied into a medium-temperature high-pressure liquid refrigerant, the medium-temperature high-pressure liquid refrigerant is subjected to throttling and depressurization by the second throttling element 34, and becomes a low-temperature low-pressure liquid refrigerant, and meanwhile, the other part of the high-temperature high-pressure gaseous refrigerant flows through the outdoor heat exchanger 1 and is subjected to heat exchange with outdoor air (heat release process), and the liquefied medium-temperature high-pressure liquid refrigerant is subjected to depressurization by the first throttling element 33, and depressurization is performed to low-temperature low-pressure liquid refrigerant; the two low-temperature and low-pressure liquid refrigerants respectively flowing out of the first indoor heat exchanger 31 and the outdoor heat exchanger 1 are converged, and before flowing to the second indoor heat exchanger 32 and the third indoor heat exchanger 36, the low-temperature and low-pressure liquid refrigerants are further throttled and depressurized by the third throttle element 35 and the fourth throttle element 37 to further become low-temperature and low-pressure liquid refrigerants, and respectively flow to the second indoor heat exchanger 32 and the third indoor heat exchanger 36 to perform heat exchange (heat absorption process) with indoor air, the air is subjected to cooling and dehumidification treatment, respectively vaporized into gaseous refrigerants, and the gaseous refrigerants of the two branches are converged and then flow to the third interface and flow to the fourth interface, and flow back to the return air port 21 of the compressor 2 through the fourth interface.

In the cooling mode of the air conditioner system 100, the switching element 4 switches the second interface, the third interface, and the fourth interface to communicate, the first interface to communicate with the fifth interface; at this time, the outdoor heat exchanger 1 is formed as a condenser, and the first indoor heat exchanger 31, the second indoor heat exchanger 32, and the third indoor heat exchanger 36 are respectively formed as evaporators; the high-temperature and high-pressure gaseous refrigerant flows from the exhaust port 22 of the compressor 2 to the switching element 4, flows through the fifth interface, and flows to the other refrigerant interface of the outdoor heat exchanger 1, flows through the outdoor heat exchanger 1, exchanges heat with outdoor air (heat release process), liquefies into a medium-temperature and high-pressure gas-liquid mixture (liquid-rich), throttles and depressurizes the medium-temperature and high-pressure gas-liquid mixture (liquid-rich) through the first throttling element 33, depressurizes the medium-temperature and high-pressure gas-liquid mixture into a low-temperature and low-pressure gas-liquid mixture (liquid-rich), and the low-temperature and low-pressure gas-liquid mixture (liquid-rich) flows through the second throttling element 34, the third throttling element 35 and the fourth throttling element 37 before flowing to the first indoor heat exchanger 31, the second indoor heat exchanger 32 and the third indoor heat exchanger 36 respectively, the low-temperature low-pressure gas-liquid mixture (more liquid) is further throttled and depressurized at the second throttling element 34, the third throttling element 35 and the fourth throttling element 37, so that the low-temperature low-pressure gas-liquid mixture (more liquid) becomes low-temperature low-pressure liquid refrigerant as much as possible, the three branched low-temperature low-pressure liquid refrigerants respectively flow through the first indoor heat exchanger 31, the second indoor heat exchanger 32 and the third indoor heat exchanger 36, are vaporized into low-pressure gas refrigerants after evaporating and absorbing heat, the fan blows cold air into the room at the moment to cool the room, and the low-pressure gas refrigerants flowing out of the first indoor heat exchanger 31 flow to the second interface because the second interface, the third interface and the fourth interface are communicated at the moment, the low-pressure gaseous refrigerants flowing out of the second indoor heat exchanger 32 and the third indoor heat exchanger 36 are converged and then flow to the third interface, and the low-pressure gaseous refrigerants of three branches flow from the second interface and the third interface to the fourth interface, respectively, and flow back to the return port 21 of the compressor 2 through the fourth interface.

In the heating mode of the air conditioner system 100, the switching element 4 switches the first interface, the second interface, and the third interface to communicate, and the fourth interface and the fifth interface to communicate; at this time, the first indoor heat exchanger 31, the second indoor heat exchanger 32, and the third indoor heat exchanger 36 are respectively formed as condensers, and the outdoor heat exchanger 1 is formed as an evaporator; the high-temperature high-pressure gaseous refrigerant flows from the exhaust port 22 of the compressor 2 to the switching element 4, flows through the second interface and the third interface, flows to the first refrigerant interface of the first indoor heat exchanger 31 and the second refrigerant interface of the second indoor heat exchanger 32, flows through the first indoor heat exchanger 31, the second indoor heat exchanger 32 and the third indoor heat exchanger 36, performs heat exchange (heat release process) with indoor air, liquefies into a medium-temperature high-pressure liquid refrigerant, at this time, the fan blows warm air into the room, heats the room, and after the medium-temperature high-pressure liquid refrigerant flowing out of the first indoor heat exchanger 31, the second indoor heat exchanger 32 and the third indoor heat exchanger 36 passes through the second throttling element 34, the third throttling element 35 and the fourth throttling element 37 respectively, the gas-liquid mixture (liquid much) with low temperature and low pressure is changed into three branches after throttling and depressurization, and then flows to the first throttling element 33, the gas-liquid mixture (liquid much) with low temperature and low pressure is throttled and depressurized further at the first throttling element 33, so that the gas-liquid mixture (liquid much) with low temperature and low pressure is changed into low-temperature and low-pressure liquid refrigerant as much as possible, the low-temperature and low-pressure liquid refrigerant flows to the outdoor heat exchanger 1, and is vaporized into low-temperature gaseous refrigerant after evaporating and absorbing heat through the outdoor heat exchanger 1, and the low-temperature gaseous refrigerant flowing out of the outdoor heat exchanger 1 sequentially flows through the fifth interface and the fourth interface because the fourth interface is communicated with the fifth interface, and from the fourth interface back to the return port 21 of the compressor 2.

The foregoing description is only of alternative embodiments of the present utility model, and is not intended to limit the scope of the utility model, and all equivalent structural changes made by the specification and drawings of the present utility model or direct/indirect application in other related technical fields are included in the scope of the present utility model.

Claims

1. An air conditioner system, comprising:

an outdoor heat exchanger;

a compressor having a return air port and an exhaust air port;

2. The air conditioner system according to claim 1, wherein in the reheat dehumidification mode, the switching element is switched to a state in which the first interface, the second interface, and the fifth interface are in communication, and the third interface and the fourth interface are in communication; and/or the number of the groups of groups,

3. The air conditioner system as set forth in claim 1 wherein said switching element comprises a five-way valve.

4. The air conditioner system as set forth in claim 1, wherein a first shut-off valve is provided between said second port and a first refrigerant port of said first indoor heat exchanger; and/or the number of the groups of groups,

5. The air conditioner system as set forth in claim 1, wherein a second throttling element is provided between the junction of the second refrigerant interface of the first indoor heat exchanger and the first refrigerant interface of the second indoor heat exchanger and the second refrigerant interface of the first indoor heat exchanger, and a third throttling element is provided between the junction of the second refrigerant interface of the first indoor heat exchanger and the first refrigerant interface of the second indoor heat exchanger;

6. The air conditioner system as set forth in claim 1, wherein a gas-liquid separator is provided at a return air port of said compressor.

7. The air conditioner system as set forth in claim 1, wherein said first heat exchanger and said second heat exchanger are formed with a heat exchanger group, said heat exchanger group being provided in plurality.

8. The air conditioner system as set forth in claim 1 further comprising a third indoor heat exchanger disposed in parallel with said second indoor heat exchanger.

9. The air conditioner system as set forth in claim 1, wherein a fourth throttling element is provided at a first refrigerant interface of said third indoor heat exchanger.

10. The air conditioner system as set forth in claim 1, further comprising an outdoor fan disposed in correspondence with said outdoor heat exchanger.