CN112432380A

CN112432380A - Air conditioning system

Info

Publication number: CN112432380A
Application number: CN202011403726.1A
Authority: CN
Inventors: 皇甫启捷; 梁祥飞; 黄明月; 黄泽清
Original assignee: Gree Electric Appliances Inc of Zhuhai
Current assignee: Gree Electric Appliances Inc of Zhuhai
Priority date: 2020-12-04
Filing date: 2020-12-04
Publication date: 2021-03-02

Abstract

The invention provides an air conditioning system. The air conditioning system comprises a compressor, a first heat exchanger, a second heat exchanger and a third heat exchanger, wherein the compressor is provided with an exhaust port assembly and an air suction port assembly, and the exhaust port assembly is communicated with the second end of the third heat exchanger; the first end of the first heat exchanger is communicated with the first end of the third heat exchanger, and the first end of the second heat exchanger is communicated with the first end of the third heat exchanger and the first end of the first heat exchanger; the air conditioning system is provided with a first air inlet and a first air outlet, and air entering from the first air inlet passes through the first heat exchanger and the second heat exchanger in sequence and then is blown into a room from the first air outlet; the air conditioning system also comprises a reversing component, when the reversing component is in a first conduction state, the air exhaust port component is communicated with the second end of the second heat exchanger through the reversing component, and the second end of the first heat exchanger is communicated with the air suction port component through the reversing component. The problem of air conditioning system among the prior art air supply travelling comfort relatively poor when dehumidification operation is solved.

Description

Air conditioning system

Technical Field

The invention relates to the field of air conditioning equipment, in particular to an air conditioning system.

Background

At present, when a fresh air conditioning system is in general refrigeration or dehumidification operation, the evaporation temperature is too low, the system energy efficiency is low, condensed water is not fully utilized, partial cold energy is wasted, and the energy utilization rate is low.

In transition season, for example when the operation of need dehumidifying in "plum rain" season and "return south" season, only need dehumidify this moment and need not lower the temperature, evaporating temperature is low when current new trend air conditioning system dehumidifies, leads to the new trend temperature that blows out to hang down excessively, influences the travelling comfort of air supply.

Disclosure of Invention

The invention mainly aims to provide an air conditioning system to solve the problem that the air conditioning system in the prior art is poor in air supply comfort during dehumidification operation.

In order to achieve the above object, the present invention provides an air conditioning system, comprising a compressor, a first heat exchanger, a second heat exchanger and a third heat exchanger, wherein the compressor is provided with an air outlet component and an air suction port component, and the air outlet component is communicated with a second end of the third heat exchanger; the first end of the first heat exchanger is communicated with the first end of the third heat exchanger, and the first end of the second heat exchanger is communicated with the first end of the third heat exchanger and the first end of the first heat exchanger; the air conditioning system is provided with a first air inlet and a first air outlet, and air entering from the first air inlet passes through the first heat exchanger and the second heat exchanger in sequence and then is blown into a room from the first air outlet; the air conditioning system further includes: and the reversing component is in a first conduction state, when the reversing component is in the first conduction state, the exhaust port assembly is communicated with the second end of the second heat exchanger through the reversing component, and the second end of the first heat exchanger is communicated with the air suction port assembly through the reversing component.

Furthermore, the air conditioning system also comprises a fresh air duct, the first heat exchanger and the second heat exchanger are both arranged in the fresh air duct, the first air inlet is arranged on the fresh air duct, and the first air inlet is communicated with the outside.

Further, the air conditioning system further includes: the water receiving tray is used for receiving condensed water generated by the first heat exchanger and the second heat exchanger; the fourth heat exchanger is provided with a first inlet and a first outlet which are communicated with each other, and a second inlet and a second outlet which are communicated with each other, and the first inlet is communicated with the water receiving disc; the first end of the third heat exchanger is communicated with the first end of the first heat exchanger through a fourth heat exchanger, the first end of the third heat exchanger is communicated with the second inlet, and the second outlet is communicated with the first end of the second heat exchanger; the first end of the third heat exchanger is communicated with the first end of the second heat exchanger through the fourth heat exchanger, and the second outlet is communicated with the first end of the second heat exchanger.

Further, the fourth heat exchanger is a counter-flow heat exchanger.

Further, the compressor comprises a first cylinder, the air suction port assembly comprises a first air suction port, and the first air suction port is communicated with the first cylinder; the reversing component is provided with a first valve port, a second valve port, a third valve port and a fourth valve port, the first valve port is communicated with the second end of the first heat exchanger, the second valve port is communicated with the exhaust port component, the third valve port is communicated with the second end of the second heat exchanger, and the fourth valve port is communicated with the first air suction port; when the reversing component is in the first conduction state, the first valve port is communicated with the fourth valve port, and the second valve port is communicated with the third valve port.

Furthermore, the compressor also comprises a second cylinder, the air suction port assembly also comprises a second air suction port, and the second air suction port is communicated with the second cylinder; one end of the first connecting pipe is connected and communicated with the second end of the first heat exchanger, and the other end of the first connecting pipe is connected with the reversing component and communicated with the first valve port; one end of the second connecting pipe is connected and communicated with the first connecting pipe, one end of the second connecting pipe is positioned between two ends of the first connecting pipe, and the other end of the second connecting pipe is connected with the compressor and communicated with the second air suction port; the one-way valve is arranged on the first connecting pipe and is positioned between the reversing component and the second connecting pipe; when the reversing component is in the second conduction state, the first valve port is communicated with the second valve port, and the third valve port is communicated with the fourth valve port.

Furthermore, the compressor also comprises a third cylinder, the air suction port assembly also comprises a third air suction port, and the third air suction port is communicated with the third cylinder; the air conditioning system further includes: the flash tank is provided with a flash tank inlet, a first flash tank outlet and a second flash tank outlet, the first end of the third heat exchanger is communicated with the second inlet through the flash tank, the first end of the third heat exchanger is communicated with the flash tank inlet, and the first flash tank outlet is communicated with the second inlet; the outlet of the second flash tank is communicated with the third air suction port.

Further, the air conditioning system further includes: a first end of the fifth heat exchanger is communicated with the inlet of the flash tank, and a second end of the fifth heat exchanger is communicated with the exhaust port assembly; the air conditioning system also comprises an air exhaust air duct, the air exhaust air duct is provided with a second air inlet and a second air outlet which are communicated with each other, the second air inlet is communicated with the indoor space, and the second air outlet is communicated with the outdoor space; the fifth heat exchanger is arranged in the exhaust air duct.

Further, the air conditioning system further includes: one end of the third connecting pipe is connected and communicated with the first end of the fifth heat exchanger, and the other end of the third connecting pipe is connected with the flash tank and communicated with the inlet of the flash tank; and the first throttling device is arranged on the third connecting pipe.

Further, the exhaust port assembly comprises a first exhaust port, and the first exhaust port is communicated with the second valve port, the second end of the third heat exchanger and the second end of the fifth heat exchanger.

Further, the exhaust port assembly comprises a second exhaust port and a third exhaust port, the second exhaust port is communicated with the second valve port and the second end of the fifth heat exchanger; the third exhaust port is communicated with the second end of the third heat exchanger.

Further, the air conditioning system further includes: and the oil return assembly is provided with an oil return assembly inlet, a first oil return assembly outlet and a second oil return assembly outlet, the oil return assembly inlet is communicated with the third exhaust port, the first oil return assembly outlet is communicated with the second end of the third heat exchanger, and the second oil return assembly outlet is communicated with the oil storage space on the base of the compressor.

Furthermore, the air conditioning system also comprises a fresh air duct, the first heat exchanger and the second heat exchanger are both arranged in the fresh air duct, the first air inlet is arranged on the fresh air duct, and the first air inlet is communicated with the outside; the air conditioning system also comprises an air exhaust air duct, the air exhaust air duct is provided with a second air inlet and a second air outlet which are communicated with each other, the second air inlet is communicated with the indoor space, and the second air outlet is communicated with the outdoor space; the air conditioning system further includes: the total heat exchanger comprises a total heat exchanger filter element, and the air in the fresh air duct and the air in the exhaust air duct exchange heat through the total heat exchanger filter element.

The air conditioning system comprises a compressor, a first heat exchanger, a second heat exchanger, a third heat exchanger and a reversing component, wherein the air conditioning system is provided with a reheating and dehumidifying mode, when the air conditioning system is in the reheating and dehumidifying mode, the reversing component is in a first conduction state, a high-temperature and high-pressure refrigerant is discharged from an air outlet component and then is divided into two paths, and one path of refrigerant enters the second heat exchanger through the reversing component; the other path of refrigerant discharged from the air outlet component is condensed and released heat through the third heat exchanger, the refrigerant discharged from the third heat exchanger is mixed with the refrigerant discharged from the second heat exchanger, the mixed refrigerant enters the first heat exchanger for heat exchange, the air is cooled and dehumidified, finally, the mixed refrigerant enters the compressor through the reversing component and the air suction port component, and the refrigerant entering the compressor is discharged from the air outlet component after being compressed, so that the whole cycle is completed. This air conditioning system cools down the dehumidification through the air that first heat exchanger got into by first air intake, and the second heat exchanger heaies up to the air that is cooled down the dehumidification, has solved the relatively poor problem of air conditioning system air supply travelling comfort when dehumidification to improve the indoor air quality when promoting indoor temperature.

Drawings

The accompanying drawings, which are incorporated in and constitute a part of this application, illustrate embodiments of the invention and, together with the description, serve to explain the invention and not to limit the invention. In the drawings:

FIG. 1 is a schematic diagram of a first embodiment of an air conditioning system according to the present invention in a reheat dehumidification mode;

FIG. 2 shows a schematic view of a first embodiment of an air conditioning system according to the present invention in a cooling mode;

FIG. 3 is a schematic view of a second embodiment of an air conditioning system according to the present invention in a reheat dehumidification mode;

FIG. 4 is a schematic diagram illustrating a second embodiment of an air conditioning system according to the present invention in a cooling mode;

FIG. 5 is a schematic view of a third embodiment of an air conditioning system according to the present invention in a reheat dehumidification mode;

fig. 6 shows a schematic view of a third embodiment of an air conditioning system according to the present invention in cooling mode.

Wherein the figures include the following reference numerals:

10. a compressor; 11. an exhaust port assembly; 12. an air suction port assembly; 121. a first air intake port; 122. a second air suction port; 123. a third air suction port; 13. a first exhaust port; 14. a second exhaust port; 15. a third exhaust port; 16. a first cylinder; 17. a second cylinder; 18. a third cylinder; 20. a first heat exchanger; 30. a second heat exchanger; 40. a third heat exchanger; 50. a commutation component; 51. a first valve port; 52. a second valve port; 53. a third valve port; 54. a fourth valve port; 60. a water pan; 70. a fourth heat exchanger; 71. a first inlet; 72. a first outlet; 73. a second inlet; 74. a second outlet; 80. a first connecting pipe; 90. a second connecting pipe; 100. a one-way valve; 110. a flash tank; 111. an inlet of a flash tank; 112. a first flash tank outlet; 113. a second flash outlet; 120. a fifth heat exchanger; 130. a fourth connecting pipe; 140. a second throttling device; 150. a third connecting pipe; 160. a first throttling device; 170. an oil return assembly; 171. an oil return assembly inlet; 172. a first oil return assembly outlet; 173. a second return assembly outlet; 180. a total heat exchanger; 190. a first fan; 200. a second fan; 210. a third fan; 220. a third throttling means; 230. a fourth throttling device; 240. a fifth connecting pipe; 250. a sixth connecting pipe; 260. and (4) an air supplement pipeline.

Detailed Description

It should be noted that the embodiments and features of the embodiments in the present application may be combined with each other without conflict. The present invention will be described in detail below with reference to the embodiments with reference to the attached drawings.

It should be noted that the following detailed description is exemplary and is intended to provide further explanation of the disclosure. Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs.

It is noted that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of example embodiments according to the present application. As used herein, the singular forms "a", "an" and "the" are intended to include the plural forms as well, and it should be understood that when the terms "comprises" and/or "comprising" are used in this specification, they specify the presence of stated features, steps, operations, devices, components, and/or combinations thereof, unless the context clearly indicates otherwise.

The invention provides an air conditioning system, please refer to fig. 1 to fig. 6, which includes a compressor 10, a first heat exchanger 20, a second heat exchanger 30 and a third heat exchanger 40, wherein the compressor 10 has an air outlet component 11 and an air suction port component 12, and the air outlet component 11 is communicated with a second end of the third heat exchanger 40; the first end of the first heat exchanger 20 is communicated with the first end of the third heat exchanger 40, and the first end of the second heat exchanger 30 is communicated with the first end of the third heat exchanger 40 and the first end of the first heat exchanger 20; the air conditioning system is provided with a first air inlet and a first air outlet, and air entering from the first air inlet passes through the first heat exchanger 20 and the second heat exchanger 30 in sequence and then is blown into a room from the first air outlet; the air conditioning system further comprises a reversing component 50, wherein the reversing component 50 has a first conducting state, when the reversing component 50 is in the first conducting state, the air outlet assembly 11 is communicated with the second end of the second heat exchanger 30 through the reversing component 50, and the second end of the first heat exchanger 20 is communicated with the air suction port assembly 12 through the reversing component 50.

The air conditioning system of the invention includes the compressor 10, the first heat exchanger 20, the second heat exchanger 30, the third heat exchanger 40 and reversing element 50, the air conditioning system has reheating dehumidification mode, when the air conditioning system is in reheating dehumidification mode, the reversing element 50 is in the first conducting state, the refrigerant of high temperature and high pressure is divided into two routes after discharging from the air outlet assembly 11, one route enters the second heat exchanger 30 through the reversing element 50; the other path of refrigerant discharged from the air outlet component 11 is condensed and released heat through the third heat exchanger 40, the refrigerant discharged from the third heat exchanger 40 is mixed with the refrigerant discharged from the second heat exchanger 30, the mixed refrigerant enters the first heat exchanger 20 for heat exchange, the air is cooled and dehumidified, finally, the mixed refrigerant enters the compressor through the reversing component 50 and the air suction port component 12, the refrigerant entering the compressor is discharged from the air outlet component 11 after being compressed, and therefore the whole cycle is completed. This air conditioning system reduces the temperature and dehumidifies the air that gets into by first air intake through first heat exchanger 20, and second heat exchanger 30 heaies up the air that is reduced the temperature and dehumidifies, has solved the relatively poor problem of air conditioning system air supply travelling comfort when dehumidification to improve the indoor air quality when promoting indoor temperature.

Specifically, as shown in fig. 1 to 6, the air conditioning system further includes a first fan 190, and the first fan 190 is disposed at a distance from the third heat exchanger 40, so that the outdoor air passes through the third heat exchanger 40 under the action of the first fan 190 to cool the refrigerant in the third heat exchanger 40.

In this embodiment, as shown in fig. 1 to 6, the air conditioning system further includes a fresh air duct, the first heat exchanger 20 and the second heat exchanger 30 are both disposed in the fresh air duct, the first air inlet is disposed on the fresh air duct, and the first air inlet is communicated with the outside. Specifically, the first heat exchanger 20 and the second heat exchanger 30 are arranged oppositely, the first heat exchanger 20 is arranged on the windward side, the second heat exchanger 30 is arranged on the leeward side, and outdoor fresh air sequentially passes through the first heat exchanger 20 and the second heat exchanger 30. This air conditioning system is new trend air conditioning system, and such setting can be got rid of the indoor muddy air of replacement with outdoor new trend to guarantee indoor air's fresh, dry and comfortable, improve indoor air quality, improve the quality of life.

Specifically, as shown in fig. 1 to 6, the air conditioning system further includes a second fan 200, and the second fan 200 is disposed at an interval with both the first heat exchanger 20 and the second heat exchanger 30, so that the outdoor air enters the fresh air duct under the action of the second fan 200, and the outdoor air sequentially passes through the first heat exchanger 20 and the second heat exchanger 30 and enters the room.

In this embodiment, as shown in fig. 1 to 6, the air conditioning system further includes a water pan 60, where the water pan 60 is configured to receive condensed water generated by the first heat exchanger 20 and the second heat exchanger 30; a fourth heat exchanger 70, the fourth heat exchanger 70 having a first inlet 71 and a first outlet 72 which are communicated with each other, and a second inlet 73 and a second outlet 74 which are communicated with each other, the first inlet 71 being communicated with the water-receiving tray 60; a first end of the third heat exchanger 40 is in communication with a first end of the first heat exchanger 20 through the fourth heat exchanger 70, a first end of the third heat exchanger 40 is in communication with the second inlet 73, and a second outlet 74 is in communication with a first end of the second heat exchanger 30; the first end of the third heat exchanger 40 communicates with the first end of the second heat exchanger 30 through the fourth heat exchanger 70 and the second outlet 74 communicates with the first end of the second heat exchanger 30. The water receiving tray 60 is arranged below the first heat exchanger 20 and the second heat exchanger 30 and is used for receiving condensed water generated by the first heat exchanger 20 and the second heat exchanger 30; the condensed water in the water pan can enter the fourth heat exchanger 70 through corresponding pipelines for heat exchange, and the condensed water after heat exchange is directly discharged outdoors through the first outlet 72. The arrangement can fully utilize the cold energy of condensed water, further reduce the enthalpy value of the inlet of the evaporator, improve the refrigerating capacity of the system per unit mass and improve the energy efficiency of the system.

Optionally, the fourth heat exchanger 70 is a counter-flow heat exchanger. The counter-flow heat exchanger is a heat exchanger in which two fluids flow in opposite directions, and is called counter flow heat exchanger. The heat exchange effect is better.

Specifically, as shown in fig. 1 to 6, the air conditioning system further includes a third throttling device 220, one end of the third throttling device 220 is connected to and communicated with the first end of the first heat exchanger 20, and the other end of the third throttling device 220 is connected to the fourth heat exchanger 70 and communicated with the second outlet 74.

Specifically, as shown in fig. 1 to 6, the air conditioning system further includes a fourth throttling device 230, one end of the fourth throttling device 230 is connected to and communicated with the first end of the second heat exchanger 30, and the other end of the fourth throttling device 230 is connected to the fourth heat exchanger 70 and communicated with the second outlet 74.

Specifically, as shown in fig. 1 to 6, the air conditioning system further includes a fifth connection pipe 240 and a sixth connection pipe 250, one end of the fifth connection pipe 240 is connected to and communicated with the first end of the first heat exchanger 20, the other end of the fifth connection pipe 240 is connected to and communicated with the second outlet 74, and the third throttling means 220 is disposed on the fifth connection pipe 240; one end of the sixth connection pipe 250 is connected and communicated with the first end of the second heat exchanger 30, the other end of the sixth connection pipe 250 is connected and communicated with the fifth connection pipe 240, and the other end of the sixth connection pipe 250 is located between the third throttling device 220 and the fourth heat exchanger 70; the fourth throttling device 230 is provided on the sixth connection pipe 250.

In the present embodiment, as shown in fig. 1 to 6, the compressor 10 includes a first cylinder 16, the suction port assembly 12 includes a first suction port 121, and the first suction port 121 communicates with the first cylinder 16; the direction changing member 50 has a first port 51, a second port 52, a third port 53 and a fourth port 54, the first port 51 is communicated with the second end of the first heat exchanger 20, the second port 52 is communicated with the exhaust port assembly 11, the third port 53 is communicated with the second end of the second heat exchanger 30, and the fourth port 54 is communicated with the first intake port 121; when the direction changing member 50 is in the first conduction state, the first port 51 communicates with the fourth port 54, and the second port 52 communicates with the third port 53.

In this embodiment, as shown in fig. 1 to fig. 6, the compressor 10 further includes a second cylinder 17, the suction port assembly 12 further includes a second suction port 122, and the second suction port 122 is communicated with the second cylinder 17; a first connection pipe 80, one end of the first connection pipe 80 being connected to and communicated with the second end of the first heat exchanger 20, and the other end of the first connection pipe 80 being connected to the direction changing part 50 and communicated with the first valve port 51; a second connection pipe 90, one end of the second connection pipe 90 being connected to and communicated with the first connection pipe 80, one end of the second connection pipe 90 being located between both ends of the first connection pipe 80, and the other end of the second connection pipe 90 being connected to the compressor 10 and being communicated with the second suction port 122; a check valve 100 provided on the first connection pipe 80 between the direction changing part 50 and the second connection pipe 90; the direction-changing component 50 further has a second conducting state, and when the direction-changing component 50 is in the second conducting state, the first port 51 is communicated with the second port 52, and the third port 53 is communicated with the fourth port 54.

Specifically, the direction changing member 50 is a four-way direction changing valve. When the four-way reversing valve is electrified, the four-way reversing valve is in a first conduction state; when the four-way reversing valve is powered off, the four-way reversing valve is in a second conduction state. The four-way reversing valve and the one-way valve are arranged to realize the switching between the reheating and dehumidifying mode and the refrigerating mode.

In this embodiment, as shown in fig. 1 to 6, the compressor 10 further includes a third cylinder 18, the suction port assembly 12 further includes a third suction port 123, and the third suction port 123 is communicated with the third cylinder 18; the air conditioning system further includes: a flash tank 110, the flash tank 110 having a flash tank inlet 111, a first flash tank outlet 112 and a second flash tank outlet 113, the first end of the third heat exchanger 40 being in communication with the second inlet 73 through the flash tank 110, the first end of the third heat exchanger 40 being in communication with the flash tank inlet 111, the first flash tank outlet 112 being in communication with the second inlet 73; the second flash outlet 113 communicates with the third suction inlet 123. Wherein the third cylinder 18 is the compressor's make-up cylinder, of minimum volume, connected to the second flash tank outlet 113 of the flash tank 110. Specifically, the first flash outlet 112 is a liquid outlet and the second flash outlet 113 is a gas outlet. The setting of flash tank 110 can reduce the evaporimeter entry quality, improves evaporimeter unit mass refrigerating output, promotes the system and moves the efficiency.

Specifically, the compressor 10 has three mutually independent compression cylinders, namely, the first cylinder 16, the second cylinder 17 and the third cylinder 18, and each compression cylinder has an independent suction port, namely, the first suction port 121, the second suction port 122 and the third suction port 123.

In the present embodiment, as shown in fig. 1 to 4, the air conditioning system further includes a fifth heat exchanger 120, a first end of the fifth heat exchanger 120 is communicated with the flash tank inlet 111, and a second end of the fifth heat exchanger 120 is communicated with the air outlet assembly 11; the air conditioning system also comprises an air exhaust air duct, the air exhaust air duct is provided with a second air inlet and a second air outlet which are communicated with each other, the second air inlet is communicated with the indoor space, and the second air outlet is communicated with the outdoor space; the fifth heat exchanger 120 is disposed in the exhaust air duct. The indoor air exhaust cold quantity can be recovered through the arrangement, and the system energy efficiency is improved.

In this embodiment, as shown in fig. 1 to 4, the air conditioning system further includes a third fan 210, and the third fan 210 and the fifth heat exchanger 120 are disposed at an interval, so that the indoor air enters the exhaust air duct from the second air inlet under the action of the third fan 210, and passes through the fifth heat exchanger 120 and is discharged from the second air outlet.

In this embodiment, as shown in fig. 1 to 4, the air conditioning system further includes a third connecting pipe 150, one end of the third connecting pipe 150 is connected to and communicated with the first end of the fifth heat exchanger 120, and the other end of the third connecting pipe 150 is connected to the flash tank 110 and communicated with the flash tank inlet 111; and a first throttling means 160 provided on the third connection pipe 150.

Specifically, as shown in fig. 1 to 6, the air conditioning system further includes a second throttling device 140, one end of the second throttling device 140 is communicated with the first end of the third heat exchanger 40, and the other end of the second throttling device 140 is communicated with the flash tank inlet 111.

Specifically, as shown in fig. 1 to 4, the air conditioning system further includes a fourth connecting pipe 130, one end of the fourth connecting pipe 130 is connected to and communicated with the first end of the third heat exchanger 40, and the other end of the fourth connecting pipe 130 is connected to the flash tank 110 and communicated with the flash tank inlet 111; the second throttling means 140 is provided on the fourth connection pipe 130; wherein, one end of the third connection pipe 150 far from the fifth heat exchanger 120 is connected with the fourth connection pipe 130 and is located between the second throttling device 140 and the flash tank 110.

In one embodiment, as shown in fig. 1, 2, 5, 6, exhaust vent assembly 11 includes a first exhaust port 13, first exhaust port 13 in communication with second valve port 52, a second end of third heat exchanger 40, and a second end of fifth heat exchanger 120. In this embodiment, the discharge ports of the three compression cylinders of the compressor 10 are the same discharge port, i.e., the first discharge port 13, and after the refrigerant is compressed in the three compression cylinders, the discharge gas is mixed and discharged uniformly.

Specifically, in the transition season, the ambient temperature is not very high, but the humidity of the air is very high, so that the human body feels uncomfortable, and a corresponding dehumidification process is required, but the indoor environment cannot be comfortable when dehumidification is performed. When the reheat dehumidification operation is required in the transition season, the air conditioning system is in the reheat dehumidification mode, as shown in fig. 1, in this case, the refrigerant side cycle is: the four-way selector valve (i.e., selector 50) is energized, and the first port 51 and the fourth port 54 of the four-way selector valve are connected, while the second port 52 and the third port 53 are connected. The high-temperature and high-pressure refrigerant discharged from the discharge port assembly 11 is divided into two paths, one path enters the second heat exchanger 30 through the second valve port 52 and the third valve port 53 of the four-way reversing valve, and the refrigerant flowing out of the second heat exchanger 30 is throttled and depressurized by the fourth throttling device 230. And the other path of refrigerant discharged from the air outlet component 11 is condensed and released heat through the third heat exchanger 40 and the fifth heat exchanger 120, and then is throttled and depressurized through the second throttling device 140 and the first throttling device 160, the throttled two-phase refrigerant is mixed, the mixed refrigerant enters the flash evaporator 110, the flashed gaseous refrigerant enters the third air suction port 123 of the compressor, and the liquid saturated refrigerant from the flash evaporator enters the fourth heat exchanger 70. In the fourth heat exchanger 70, the saturated liquid refrigerant exchanges heat with the condensed water, the condensed water after heat exchange is discharged outdoors, the supercooled liquid refrigerant coming out of the fourth heat exchanger 70 is mixed with the refrigerant coming out of the fourth throttling device 230, the mixed vapor-liquid two-phase refrigerant is throttled and depressurized again by the third throttling device 220, and then enters the first heat exchanger 20 for heat exchange, and the air is cooled and dehumidified. The gaseous refrigerant coming out of the first heat exchanger 20 is divided into two paths again, one path directly enters the second suction port 122 of the compressor, the other path passes through the check valve 100, then sequentially passes through the first valve port 51 and the fourth valve port 54 of the four-way reversing valve, and finally enters the first suction port 121 of the compressor. After the compression of the refrigerant entering the compressor is completed in the respective compression cylinders, the exhaust gas is mixed and discharged, thereby completing the whole cycle.

Specifically, when the air conditioning system is in the reheat dehumidification mode, the air side cycle is: the third fan 210 sucks the turbid indoor air into the exhaust air duct, and the indoor exhaust air exchanges heat with the fifth heat exchanger 120 to recover the indoor air cooling capacity (the fifth heat exchanger 120 is equivalent to a sensible heat recovery device). The second fan 200 sucks outdoor high-humidity fresh air into the fresh air duct, and the outdoor fresh air passes through the first heat exchanger 20 and the second heat exchanger 30 in sequence. The first heat exchanger 20 cools and dehumidifies outdoor high-humidity air, and the second heat exchanger 30 heats up the cooled and dehumidified fresh air, so that the indoor air quality is improved while the indoor temperature is increased. The air conditioning system continuously and circularly reciprocates the process, and the indoor muddy air is replaced by the outdoor fresh air, so that the freshness, dryness and comfort of the indoor air are ensured, the indoor air quality is improved, and the life quality is improved.

Specifically, when the air conditioning system is in the reheating and dehumidifying mode, the switching between the refrigerating mode and the reheating and dehumidifying mode is realized through the reversing of the four-way reversing valve. This reheating dehumidification mode not only adopts parallel compression technique, condensation water supercooling cooling module, sensible heat recovery technique etc. to improve the efficiency of system, can promote the comfort level of new trend to the reheat processing of air moreover. In this case, the first heat exchanger 20 serves as an evaporator, and the second heat exchanger 30 serves as a low-temperature condenser, so that on one hand, the condensing temperature of the system can be reduced to a certain extent, and the supercooling degree of the system can be increased, thereby further improving the energy efficiency of the system. On the other hand, when dehumidification is carried out in a damp and hot area and in an excessive season, the purpose of dehumidification can be achieved only when the temperature of the evaporator is often low, so that the temperature of the air to be treated is low, people can feel uncomfortable when the air is directly blown to the surface of a human body, and after the second heat exchanger 30 is used as a low-temperature condenser, the dehumidified air is heated, so that the requirement on air comfort is met, and the dehumidifying air-conditioning system has unique performance advantages.

Specifically, the air conditioning system further has a cooling mode, as shown in fig. 2, when the air conditioning system is in the cooling mode, the refrigerant side cycle is as follows: at this time, the four-way selector valve is de-energized, the third port 53 and the fourth port 54 of the four-way selector valve are open, and the first port 51 and the second port 52 are open. The high-temperature and high-pressure gas after the refrigerant is compressed by the compressor 10 respectively enters the third heat exchanger 40 and the fifth heat exchanger 120 (at this time, although the first valve port 51 and the second valve port 52 are connected, the high-temperature and high-pressure gas cannot pass through the check valve 100), wherein the air in the outdoor environment exchanges heat with the third heat exchanger 40, and the air discharged indoors exchanges heat with the fifth heat exchanger 120. After the refrigerant releases heat and condenses into high-pressure refrigerant liquid in the third heat exchanger 40 and the fifth heat exchanger 120, the refrigerant is throttled and depressurized by the second throttling device 140 and the first throttling device 160, the throttled refrigerant is mixed and then enters the flash evaporator 110, and the gaseous saturated refrigerant separated from the flash evaporator 110 is sucked into the third suction port 123 of the compressor 10 through the air supplement pipeline 260; the liquid saturated refrigerant separated by the flash tank enters the fourth heat exchanger 70. In the fourth heat exchanger 70, the saturated liquid refrigerant exchanges heat with the low-temperature condensed water of the air conditioner, and is further subcooled, the condensed water after heat exchange is discharged out of the room along with the pipeline, the subcooled liquid refrigerant coming out of the fourth heat exchanger 70 is throttled and depressurized by the third throttling device 220 and the fourth throttling device 230 respectively, the throttled low-pressure two-phase refrigerant absorbs heat and is gasified in the first heat exchanger 20 and the second heat exchanger 30 respectively, the gaseous refrigerant coming out of the first heat exchanger 20 enters the second air suction port 122 of the compressor, and the gaseous refrigerant coming out of the second heat exchanger 30 passes through the third valve port 53 and the fourth valve port 54 of the four-way reversing valve and finally enters the first air suction port 121 of the compressor 10; after the compression of the refrigerant entering the compressor is completed in the respective compression cylinders, the exhaust gas is mixed and discharged, thereby completing the whole cycle.

When the air conditioning system is in the cooling mode, the air side cycle is as follows: the third fan 210 sucks the low-temperature and turbid indoor air into the exhaust air duct, and dissipates heat to the fifth heat exchanger 120 by using the indoor exhaust air, thereby recovering the cold energy of the indoor air (i.e., the fifth heat exchanger 120 is equivalent to a sensible heat recovery device). The second fan 200 sucks outdoor high-temperature fresh air into the fresh air duct, the outdoor fresh air passes through the first heat exchanger 20 and the second heat exchanger 30 in sequence, and the cooled and dehumidified fresh air is sent into the room. The fresh air machine continuously and circularly reciprocates the process, and the indoor muddy air is replaced by the outdoor fresh air, so that the freshness, dryness and comfort of the indoor air are ensured, the indoor air quality is improved, and the life quality is improved.

When the air conditioning system is in a refrigeration mode, the first heat exchanger 20 and the second heat exchanger 30 are respectively used as a high-temperature evaporator and a low-temperature evaporator, the high-temperature evaporator is mainly responsible for sensible heat load, the low-temperature evaporator is mainly responsible for latent heat load, step cooling and dehumidification treatment is carried out on outdoor fresh air, dryness and humidity are distinct, heat exchange temperature difference is reduced, irreversible loss in a heat exchange process is reduced, and system energy efficiency is improved. The third heat exchanger 40 and the fifth heat exchanger 120 are respectively used as a high-temperature condenser and a low-temperature condenser, and the fifth heat exchanger 120 used as the low-temperature condenser is used for recovering cold in indoor exhaust air, and is equivalent to a sensible heat recovery device. As the gaseous refrigerant enters the compressor in an air supplementing mode through the flash evaporator 110, the inlet enthalpy value of the refrigerant entering the first heat exchanger 20 and the second heat exchanger 30 (evaporators) is reduced, and meanwhile, the condensed water is adopted to subcool the liquid refrigerant separated out by the flash evaporator 110, so that the refrigerant is further subcooled, the inlet enthalpy value of the evaporators is further reduced, the refrigerating capacity of the refrigerant per unit mass is improved, and the purpose of improving the energy efficiency of the system is achieved.

In another embodiment, as shown in fig. 3 and 4, the exhaust port assembly 11 includes a second exhaust port 14 and a third exhaust port 15, the second exhaust port 14 being in communication with the second valve port 52 and a second end of the fifth heat exchanger 120; the third exhaust port 15 communicates with a second end of the third heat exchanger 40. Specifically, the air conditioning system further includes an oil return assembly 170, the oil return assembly 170 has an oil return assembly inlet 171, a first oil return assembly outlet 172 and a second oil return assembly outlet 173, the oil return assembly inlet 171 is communicated with the third exhaust port 15, the first oil return assembly outlet 172 is communicated with the second end of the third heat exchanger 40, and the second oil return assembly outlet 173 is communicated with the oil storage space on the base of the compressor 10.

Specifically, in the embodiment, the three-cylinder compressor is partially modified, the original single-discharge compressor is changed into a double-discharge compressor, and an oil return component is added to solve the oil return problem of the direct discharge cylinder; at this time, the third heat exchanger 40 is connected to the third exhaust port 15 of the compressor, the fifth heat exchanger 120 is connected to the second exhaust port 14 of the compressor, and the connection mode of the other pipes is not changed. The double-exhaust compressor is adopted, so that the air conditioning system has two condensation temperatures during the operation in a refrigeration mode, the supercooling degree of the system is effectively increased, and the system energy efficiency is improved. Wherein, when the air conditioning system is in the reheating and dehumidifying mode, the operation condition is as shown in fig. 3; when the air conditioning system is in the cooling mode, the operation is as shown in fig. 4.

In another embodiment, as shown in fig. 5 and 6, the air conditioning system further includes a fresh air duct, the first heat exchanger 20 and the second heat exchanger 30 are both disposed in the fresh air duct, the first air inlet is disposed on the fresh air duct, and the first air inlet is communicated with the outside; the air conditioning system also comprises an air exhaust air duct, the air exhaust air duct is provided with a second air inlet and a second air outlet which are communicated with each other, the second air inlet is communicated with the indoor space, and the second air outlet is communicated with the outdoor space; the air conditioning system further comprises a total heat exchanger 180, the total heat exchanger 180 comprises a total heat exchanger filter element, and air in the fresh air duct and air in the exhaust air duct exchange heat through the total heat exchanger filter element. Specifically, in this embodiment, the third fan 210 of the air conditioning system and the total heat exchanger 180 are arranged at an interval, so that the indoor air enters the exhaust air duct from the second air inlet under the action of the third fan 210, and is exhausted from the second air outlet after passing through the total heat exchanger 180; the outdoor air enters the fresh air duct under the action of the second fan 200, exchanges heat with the air in the exhaust air duct through the total heat exchanger 180, and then sequentially passes through the first heat exchanger 20 and the second heat exchanger 30 and enters the room. Wherein, the air in the fresh air duct and the air in the exhaust air duct flow through the total heat exchanger filter element in an orthogonal difference mode. The indoor air exhaust cold quantity can be recovered through the arrangement, and the system energy efficiency is improved.

Specifically, in this embodiment, the air conditioning system employs the total heat exchanger 180, and simultaneously removes the fifth heat exchanger 120 and the first throttling device 160, and performs corresponding modifications on the exhaust air duct and the fresh air duct; the arrangement of the total heat exchanger 180 can not only recover sensible heat, but also recover partial latent heat, the efficiency of energy recovery is improved, and simultaneously, the system is more compact. Wherein, when the air conditioning system is in the reheating and dehumidifying mode, the operation condition is as shown in fig. 5; the operation when the air conditioning system is in cooling mode is shown in fig. 6.

In the present embodiment, for the air conditioning system, there is a control method as follows: the air conditioning system is provided with a detection module, an air purification and filtration device and the like, wherein the detection module detects the temperature, the relative humidity and the like of indoor and outdoor environments. When the outdoor ambient temperature T_outPreferably, T1 is less than or equal to T_outT2 and relative humidity

Less than a predetermined value

1, adopt the ventilation mode, third fan 210, second fan 200 open, trade the wind naturally, improve the air supply quality through filtration purifier, improve the indoor air quality. When the air conditioning system operates in the transition season, the outdoor environment temperature is not very high, but the humidity is very high, namely T1 is less than or equal to T_outLess than or equal to T2, relative humidity

Greater than a predetermined value

And 2, starting a reheating dehumidification mode, and electrifying the four-way reversing valve at the moment.

The invention solves the following technical problems: the problem that the system operation energy efficiency of the existing fresh air dehumidification system is too low during refrigeration and dehumidification operation is solved; the problem of reduced comfort caused by excessively low air outlet temperature of an air conditioner when the dehumidification mode is operated in a transition season in a damp and hot area is solved; the control problem of the valves in different operation modes is solved, and the conversion of the system function modes in different operation modes is realized.

The invention has the beneficial effects that: by improving the indoor heat exchanger connecting pipeline and optimizing the operation control mode; the system energy efficiency is improved by adopting parallel compression, cascade heat exchange, sensible (total) heat recovery technology and a water supercooling efficiency improving module; the air supply reheating mode of the damp and hot area during the operation in the dehumidification mode in the transition season is increased, the air supply temperature is increased, the requirement of indoor environment comfort is met, and efficient and comfortable operation in multiple operation modes is realized.

The invention is characterized in that: two evaporators are arranged on the evaporation side, and the running energy efficiency of the system is improved by performing gradient cooling and dehumidifying treatment on the indoor fresh air under the condition of ensuring the refrigerating capacity and dehumidifying capacity of the system; and by adopting parallel compression, the inlet dryness of the evaporator is reduced, the unit mass refrigerating capacity of the evaporator is improved, and the system operation energy efficiency is improved. By adopting the condensed water supercooling effect-improving module, the cold energy of the condensed water is fully utilized, the enthalpy value of an inlet of the evaporator is further reduced, the unit mass refrigerating capacity of the system is improved, and the energy efficiency of the system is improved; a sensible heat recovery device or a total heat exchanger is arranged at the indoor exhaust air position to recover the cold energy of the indoor exhaust air and improve the energy efficiency of the system; when the dehumidification mode in a transition season operates, the leeward side heat exchanger can be converted into the reheating heat exchanger through the control of the valve, so that the air supply temperature during the operation of the dehumidification mode is improved, the temperature of a refrigerant at the outlet of the condenser is reduced, the cold degree and the supercooling degree of the condenser are increased, the energy efficiency of a system is improved, and the indoor environment comfort is improved while the dehumidification effect is ensured; through a reasonable control method, the functions of the heat exchanger are switched under different operation modes by using valve assemblies as few as possible.

From the above description, it can be seen that the above-described embodiments of the present invention achieve the following technical effects:

It should be noted that the terms "first," "second," and the like in the description and claims of this application and in the drawings described above are used for distinguishing between similar elements and not necessarily for describing a particular sequential or chronological order. It is to be understood that the data so used is interchangeable under appropriate circumstances such that the embodiments of the application described herein are, for example, capable of operation in sequences other than those illustrated or otherwise described herein. Furthermore, the terms "comprises," "comprising," and "having," and any variations thereof, are intended to cover a non-exclusive inclusion, such that a process, method, system, article, or apparatus that comprises a list of steps or elements is not necessarily limited to those steps or elements expressly listed, but may include other steps or elements not expressly listed or inherent to such process, method, article, or apparatus.

Spatially relative terms, such as "above … …," "above … …," "above … …," "above," and the like, may be used herein for ease of description to describe one device or feature's spatial relationship to another device or feature as illustrated in the figures. It will be understood that the spatially relative terms are intended to encompass different orientations of the device in use or operation in addition to the orientation depicted in the figures. For example, if a device in the figures is turned over, devices described as "above" or "on" other devices or configurations would then be oriented "below" or "under" the other devices or configurations. Thus, the exemplary term "above … …" can include both an orientation of "above … …" and "below … …". The device may be otherwise variously oriented (rotated 90 degrees or at other orientations) and the spatially relative descriptors used herein interpreted accordingly.

The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention, and various modifications and changes may be made by those skilled in the art. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims

1. An air conditioning system, comprising a compressor (10), a first heat exchanger (20), a second heat exchanger (30) and a third heat exchanger (40), the compressor (10) having a discharge port assembly (11) and a suction port assembly (12), the discharge port assembly (11) communicating with a second end of the third heat exchanger (40); the first end of the first heat exchanger (20) is communicated with the first end of the third heat exchanger (40), and the first end of the second heat exchanger (30) is communicated with both the first end of the third heat exchanger (40) and the first end of the first heat exchanger (20); the air conditioning system is provided with a first air inlet and a first air outlet, and air entering from the first air inlet passes through the first heat exchanger (20) and the second heat exchanger (30) in sequence and then is blown to the indoor through the first air outlet; the air conditioning system further includes:

the reversing component (50) is provided with a first conduction state, when the reversing component (50) is in the first conduction state, the exhaust port assembly (11) is communicated with the second end of the second heat exchanger (30) through the reversing component (50), and the second end of the first heat exchanger (20) is communicated with the air suction port assembly (12) through the reversing component (50).

2. The air conditioning system of claim 1, further comprising a fresh air duct, wherein the first heat exchanger (20) and the second heat exchanger (30) are both disposed in the fresh air duct, and wherein the first air inlet is disposed on the fresh air duct and is communicated with the outside.

3. The air conditioning system of claim 1, further comprising:

a water pan (60) for receiving condensed water generated by the first heat exchanger (20) and the second heat exchanger (30);

a fourth heat exchanger (70), the fourth heat exchanger (70) having a first inlet (71) and a first outlet (72) in communication with each other and a second inlet (73) and a second outlet (74) in communication with each other, the first inlet (71) being in communication with the drip tray (60); a first end of the third heat exchanger (40) is communicated with a first end of the first heat exchanger (20) through the fourth heat exchanger (70), a first end of the third heat exchanger (40) is communicated with the second inlet (73), and the second outlet (74) is communicated with a first end of the second heat exchanger (30); the first end of the third heat exchanger (40) is in communication with the first end of the second heat exchanger (30) through the fourth heat exchanger (70), and the second outlet (74) is in communication with the first end of the second heat exchanger (30).

4. Air conditioning system according to claim 3, characterized in that the fourth heat exchanger (70) is a counter flow heat exchanger.

5. Air conditioning system according to claim 3, wherein the compressor (10) comprises a first cylinder (16), the suction assembly (12) comprising a first suction port (121), the first suction port (121) communicating with the first cylinder (16);

the direction changing component (50) is provided with a first valve port (51), a second valve port (52), a third valve port (53) and a fourth valve port (54), the first valve port (51) is communicated with the second end of the first heat exchanger (20), the second valve port (52) is communicated with the exhaust port assembly (11), the third valve port (53) is communicated with the second end of the second heat exchanger (30), and the fourth valve port (54) is communicated with the first intake port (121);

when the direction changing component (50) is in the first conduction state, the first valve port (51) is communicated with the fourth valve port (54), and the second valve port (52) is communicated with the third valve port (53).

6. Air conditioning system according to claim 5, wherein the compressor (10) further comprises a second cylinder (17), the suction assembly (12) further comprising a second suction port (122), the second suction port (122) being in communication with the second cylinder (17);

a first connecting pipe (80), one end of the first connecting pipe (80) is connected with and communicated with a second end of the first heat exchanger (20), and the other end of the first connecting pipe (80) is connected with the reversing component (50) and communicated with the first valve port (51);

one end of the second connecting pipe (90) is connected and communicated with the first connecting pipe (80), one end of the second connecting pipe (90) is positioned between two ends of the first connecting pipe (80), and the other end of the second connecting pipe (90) is connected with the compressor (10) and communicated with the second air suction port (122);

a check valve (100) provided on the first connection pipe (80) between the direction changing part (50) and the second connection pipe (90);

the direction changing component (50) further has a second conduction state, when the direction changing component (50) is in the second conduction state, the first valve port (51) is communicated with the second valve port (52), and the third valve port (53) is communicated with the fourth valve port (54).

7. Air conditioning system according to claim 6, wherein the compressor (10) further comprises a third cylinder (18), the suction port assembly (12) further comprising a third suction port (123), the third suction port (123) being in communication with the third cylinder (18); the air conditioning system further includes:

a flash tank (110), said flash tank (110) having a flash tank inlet (111), a first flash tank outlet (112) and a second flash tank outlet (113), a first end of said third heat exchanger (40) being in communication with said second inlet (73) through said flash tank (110), a first end of said third heat exchanger (40) being in communication with said flash tank inlet (111), said first flash tank outlet (112) being in communication with said second inlet (73); the second flash tank outlet (113) is in communication with the third suction inlet (123).

8. The air conditioning system of claim 7, further comprising:

a fifth heat exchanger (120), a first end of the fifth heat exchanger (120) being in communication with the flash tank inlet (111), a second end of the fifth heat exchanger (120) being in communication with the vent assembly (11);

the air conditioning system also comprises an air exhaust air duct, wherein the air exhaust air duct is provided with a second air inlet and a second air outlet which are communicated with each other, the second air inlet is communicated with the indoor space, and the second air outlet is communicated with the outdoor space; the fifth heat exchanger (120) is arranged in the exhaust air duct.

9. The air conditioning system of claim 8, further comprising:

one end of the third connecting pipe (150) is connected with and communicated with the first end of the fifth heat exchanger (120), and the other end of the third connecting pipe (150) is connected with the flash tank (110) and communicated with the flash tank inlet (111);

a first throttling means (160) provided on the third connection pipe (150).

10. The air conditioning system of claim 8, wherein the vent assembly (11) includes a first vent (13), the first vent (13) communicating with the second port (52), the second end of the third heat exchanger (40), and the second end of the fifth heat exchanger (120).

11. The air conditioning system of claim 8, wherein the vent assembly (11) includes a second vent (14) and a third vent (15), the second vent (14) communicating with the second valve port (52) and a second end of the fifth heat exchanger (120); the third exhaust port (15) is communicated with a second end of the third heat exchanger (40).

12. The air conditioning system of claim 11, further comprising:

the oil return assembly (170) is provided with an oil return assembly inlet (171), a first oil return assembly outlet (172) and a second oil return assembly outlet (173), the oil return assembly inlet (171) is communicated with the third exhaust port (15), the first oil return assembly outlet (172) is communicated with the second end of the third heat exchanger (40), and the second oil return assembly outlet (173) is communicated with an oil storage space on the base of the compressor (10).

13. The air conditioning system of claim 7, further comprising a fresh air duct, wherein the first heat exchanger (20) and the second heat exchanger (30) are both disposed in the fresh air duct, the first air inlet is disposed on the fresh air duct, and the first air inlet is communicated with the outside; the air conditioning system also comprises an air exhaust air duct, wherein the air exhaust air duct is provided with a second air inlet and a second air outlet which are communicated with each other, the second air inlet is communicated with the indoor space, and the second air outlet is communicated with the outdoor space; the air conditioning system further includes:

and the total heat exchanger (180) comprises a total heat exchanger filter element, and the air in the fresh air duct and the air in the exhaust air duct flow through the total heat exchanger filter element for heat exchange.