阅读说明：本技术 空调系统 (Air conditioning system ) 是由 解丹 王芳 倪毅 李龙飞 薛寒冬 于 2021-03-04 设计创作，主要内容包括：本发明涉及一种空调系统,包括压缩机、室外换热器、第一室内换热器、第二室内换热器、第一配管、第二配管及第三配管,第一配管的一端能与压缩机的排出口或回气口连通,第一配管的另一端连通第一室内换热器的第一过口、第二室内换热器的第三过口及室外换热器,第三配管与压缩机的排出口连通。在除湿再热模式下,连通第二配管与第一室内换热器,连通第三配管与第二室内换热器。在制冷模式下,连通第二配管与第一室内换热器及第二室内换热器,断开第三配管。空调系统中连接于第一配管与第三配管之间的泄流管,当空调系统切换到制冷模式时堆积在第三配管内的冷媒压力较高可以通过泄流管排入到冷媒压力较低的第一配管中,防止空调系统内堆积冷媒。(The invention relates to an air conditioning system, which comprises a compressor, an outdoor heat exchanger, a first indoor heat exchanger, a second indoor heat exchanger, a first piping, a second piping and a third piping, wherein one end of the first piping can be communicated with a discharge port or an air return port of the compressor, the other end of the first piping is communicated with a first through port of the first indoor heat exchanger, a third through port of the second indoor heat exchanger and the outdoor heat exchanger, and the third piping is communicated with the discharge port of the compressor. In the dehumidification and reheat mode, the second pipe and the first indoor heat exchanger are communicated, and the third pipe and the second indoor heat exchanger are communicated. In the cooling mode, the second pipe is connected to the first indoor heat exchanger and the second indoor heat exchanger, and the third pipe is disconnected. The air conditioning system is provided with a drainage pipe connected between the first pipe and the third pipe, when the air conditioning system is switched to a refrigeration mode, the refrigerant accumulated in the third pipe with higher pressure can be discharged into the first pipe with lower pressure through the drainage pipe, and the refrigerant accumulation in the air conditioning system is prevented.)

1. An air conditioning system having a dehumidification reheating mode and a cooling mode, the air conditioning system comprising a compressor (10), an outdoor heat exchanger (20), a first indoor heat exchanger (30), a second indoor heat exchanger (40), a first piping (52), a second piping (54), and a third piping (56), the first indoor heat exchanger (30) having a first port (32) and a second port (34) communicating with each other, the second indoor heat exchanger (40) having a third port (41) and a fourth port (43) communicating with each other, one end of the first piping (52) being capable of communicating with a discharge port (12) or a return port (14) of the compressor (10), the other end of the first piping (52) communicating with the first port (32) of the first indoor heat exchanger (30), the third port (41) of the second indoor heat exchanger (40), and the outdoor heat exchanger (20), the third pipe (56) is communicated with a discharge port (12) of the compressor (10);

in the dehumidification and reheat mode, the first pipe (52) communicates with a discharge port (12) of the compressor (10), the second pipe (54) communicates the second port (34) of the first indoor heat exchanger (30) with a return port (14) of the compressor (10), and the third pipe (56) communicates the discharge port (12) of the compressor (10) with the fourth port (43) of the second indoor heat exchanger (40);

in the cooling mode, the first pipe (52) communicates with a discharge port (12) of the compressor (10), the second port (34) of the first indoor heat exchanger (30) and the fourth port (43) of the second indoor heat exchanger (40) communicate with a return port (14) of the compressor (10) through the second pipe (54), and the third pipe (56) is disconnected from the first indoor heat exchanger (30) and the second indoor heat exchanger (40);

wherein the air conditioning system further comprises a drain pipe (60), the drain pipe (60) being connected between the first pipe (52) and the third pipe (56).

2. Air conditioning system according to claim 1, characterized in that the drain (60) is a capillary tube.

3. The air conditioning system of claim 1 or 2, wherein the air conditioning system further has a heating mode;

in the heating mode, the second pipe (54) communicates the discharge port (12) of the compressor (10) with the second port (34) of the first indoor heat exchanger (30), the third pipe (56) communicates the discharge port (12) of the compressor (10) with the fourth port (43) of the second indoor heat exchanger (40), and the first pipe (52) communicates with the return port (14) of the compressor (10).

4. The air conditioning system according to claim 3, further comprising a first switching device (70), wherein the first switching device (70) is configured to control the second opening (34) of the first indoor heat exchanger (30) to be opened and closed with the second pipe (54) and the third pipe (56), and wherein the first switching device (70) is further configured to control the fourth opening (43) of the second indoor heat exchanger (40) to be opened and closed with the second pipe (54) and the third pipe (56).

5. Air conditioning system according to claim 4, characterized in that the first switching device (70) comprises a first connection pipe (72), a first control valve (73) and a second control valve (74), the first connecting pipe (72) comprises a first branch pipe (721) and a second branch pipe (723), the first branch pipe (721) communicates the second port (34) of the first indoor heat exchanger (30) with the second pipe (54), the second branch pipe (723) communicates the second port (34) of the first indoor heat exchanger (30) with the third pipe (56), the first control valve (73) is arranged on the first branch pipe (721) and is used for opening and closing the first branch pipe (721), the second control valve (74) is arranged on the second branch pipe (723) and used for opening and closing the second branch pipe (723).

6. Air conditioning system according to claim 5, characterized in that said first switching means (70) comprises a second connection pipe (75), a third control valve (76) and a fourth control valve (78), the second connection pipe (75) comprises a third branch pipe (752) and a fourth branch pipe (754), the third branch pipe (752) communicates the fourth port (43) of the second indoor heat exchanger (40) with the second pipe (54), the fourth branch pipe (754) communicates the fourth port (43) of the second indoor heat exchanger (40) with the third pipe (56), the third control valve (76) is provided on the third branch pipe (752) for opening and closing the third branch pipe (752), the fourth control valve (78) is arranged on the fourth branch pipe (754) and used for opening and closing the fourth branch pipe (754).

7. Air conditioning system according to claim 6, characterized in that it further comprises a third connecting pipe (81) and a fourth connecting pipe (83), said third connecting pipe (81) being connected between said second through opening (34) of said first indoor heat exchanger (30) and said first connecting pipe (72), said fourth connecting pipe (83) being connected between said fourth through opening (43) of said second indoor heat exchanger (40) and said second connecting pipe (75).

8. The air conditioning system according to claim 6 or 7, wherein one end of the second pipe (54) communicates with the first branch pipe (721) and the third branch pipe (752), and the other end of the second pipe (54) can communicate with a discharge port (12) of the compressor (10) or a return port (14) of the compressor (10);

one end of the third pipe (56) communicates with the second branch pipe (723) and the fourth branch pipe (754), and the other end of the third pipe (56) communicates with a discharge port (12) of the compressor (10).

9. The air conditioning system according to claim 3, further comprising a second switching device (90), wherein the second switching device (90) communicates the first pipe (52) with the discharge port (12) of the compressor (10) and communicates the second pipe (54) with the return port (14) of the compressor (10) in the dehumidification and reheat mode and the cooling mode;

in the heating mode, the second switching device (90) communicates the second pipe (54) with the discharge port (12) of the compressor (10), and communicates the first pipe (52) with the return port (14) of the compressor (10).

10. The air conditioning system as claimed in claim 9, wherein the second switching device (90) comprises a first four-way valve (92), the first four-way valve (92) being used to communicate the discharge port (12) of the compressor (10) with the first piping (52), or the first four-way valve (92) being used to communicate the return port (14) of the compressor (10) with the first piping (52).

11. The air conditioning system as claimed in claim 10, wherein the second switching device (90) comprises a second four-way valve (94), the second four-way valve (94) being used for communicating the return port (14) of the compressor (10) with the second piping (54), or the second four-way valve (94) being used for communicating the discharge port (12) of the compressor (10) with the second piping (54).

12. Air conditioning system according to claim 11, characterized in that the first four-way valve (92) has a first inlet (D)₁) A first outlet (C)₁) A second outlet (S)₁) And a third outlet (E)₁) The second four-way valve (94) has a second inlet (D)₂) And a fourth outlet (C)₂) A fifth outlet (S)₂) And a sixth outlet (E)₂)；

The first inlet (D)₁) And said second inlet (D)₂) Are all communicated with a discharge port (12) of the compressor (10), and the first outlet (C)₁) The second outlet (S) is communicated with the first pipe (52)₁) And a third outlet (E)₁) Are all communicated with a return air port (14) of the compressor (10), and the fourth outlet (C)₂) The fifth outlet (S) is communicated with the second pipe (54)₂) And the sixth outlet (E)₂) Are both communicated with a return air port (14) of the compressor (10);

the first inlet (D)₁) Can be switched to the first outlet (C)₁) Or a third outlet (E)₁) Communication, the second inlet (D)₂) Can be switched to the fourth outlet (C)₂) Or a sixth outlet (E)₂) Communication, the third outlet (E)₁) A capillary pipeline is arranged between the first outlet (E) and the return air port (14) of the compressor (10), and the sixth outlet (E)₂) And a capillary pipeline is arranged between the capillary pipeline and the air return port (14) of the compressor (10).

Technical Field

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

Background

Along with the improvement of living standard of people, people are more and more popular to use the air conditioner. In order to meet the requirements of different people on temperature and functions, a plurality of functional modules are developed, but the design defects are also brought. For example, different working modes are switched by pipeline design and configuration of electronic components, but some pipelines need to be connected and disconnected in the switching process, and after the pipelines are switched from a connected state to a disconnected state, part of refrigerant may be accumulated in the pipelines, which affects the service life of the air conditioner.

Disclosure of Invention

The invention provides an air conditioning system aiming at the problem of refrigerant accumulation in an air conditioner, and the air conditioning system can achieve the technical effect of preventing the refrigerant accumulation in the air conditioner.

An air conditioning system having a dehumidification reheating mode and a cooling mode, the air conditioning system comprising a compressor, an outdoor heat exchanger, a first indoor heat exchanger, a second indoor heat exchanger, a first piping, a second piping, and a third piping, the first indoor heat exchanger having a first port and a second port that communicate with each other, the second indoor heat exchanger having a third port and a fourth port that communicate with each other, one end of the first piping being capable of communicating with a discharge port or a return air port of the compressor, the other end of the first piping communicating with the first port of the first indoor heat exchanger, the third port of the second indoor heat exchanger, and the outdoor heat exchanger, the third piping communicating with a discharge port of the compressor;

in the dehumidification and reheat mode, the first pipe communicates with a discharge port of the compressor, the second pipe communicates the second port of the first indoor heat exchanger with a return port of the compressor, and the third pipe communicates the discharge port of the compressor with the fourth port of the second indoor heat exchanger;

in the cooling mode, the first pipe is in communication with a discharge port of the compressor, the second port of the first indoor heat exchanger and the fourth port of the second indoor heat exchanger are in communication with a return port of the compressor via the second pipe, and the third pipe is disconnected from the first indoor heat exchanger and the second indoor heat exchanger;

the air conditioning system further comprises a drain pipe connected between the first pipe and the third pipe.

The air conditioning system has a dehumidification reheating mode and a refrigeration mode, and a user can select different working modes according to actual requirements. In the dehumidification reheating mode, the first pipe communicates with the discharge port of the compressor, the second pipe communicates with the return port of the compressor, and the second pipe communicates with the first indoor heat exchanger and the third pipe communicates with the second indoor heat exchanger. In the cooling mode, the first pipe communicates with the discharge port of the compressor, the second pipe communicates with the return port of the compressor, the second pipe communicates with the first indoor heat exchanger and the second indoor heat exchanger, and the third pipe disconnects the first indoor heat exchanger and the second indoor heat exchanger.

The air conditioning system further includes a drain pipe connected between the first pipe and the third pipe. Thus, when the air conditioning system is switched to the cooling mode, the refrigerant with higher pressure accumulated in the third pipe can be discharged into the first pipe with lower pressure through the discharge pipe, and then can be converged with the refrigerant in the first pipe and flow into the first indoor heat exchanger and the second indoor heat exchanger to perform refrigerant circulation, so that the refrigerant accumulation in the pipeline inside the air conditioning system can be prevented.

In one embodiment, the drain tube is a capillary tube.

In one embodiment, the air conditioning system further has a heating mode;

in the heating mode, the second pipe communicates a discharge port of the compressor with the second port of the first indoor heat exchanger, the third pipe communicates a discharge port of the compressor with the fourth port of the second indoor heat exchanger, and the first pipe communicates with a return port of the compressor.

In one embodiment, the air conditioning system further includes a first switching device, the first switching device is configured to control on/off of the second port of the first indoor heat exchanger, the second pipe, and the third pipe, and the first switching device is further configured to control on/off of the fourth port of the second indoor heat exchanger, the second pipe, and the third pipe.

In one embodiment, the first switching device includes a first connection pipe, a first control valve, and a second control valve, the first connection pipe includes a first branch pipe and a second branch pipe, the first branch pipe communicates with the second opening of the first indoor heat exchanger and the second pipe, the second branch pipe communicates with the second opening of the first indoor heat exchanger and the third pipe, the first control valve is disposed on the first branch pipe for opening and closing the first branch pipe, and the second control valve is disposed on the second branch pipe for opening and closing the second branch pipe.

In one embodiment, the first switching device includes a second connection pipe, a third control valve, and a fourth control valve, the second connection pipe includes a third branch pipe and a fourth branch pipe, the third branch pipe communicates the fourth opening of the second indoor heat exchanger with the second pipe, the fourth branch pipe communicates the fourth opening of the second indoor heat exchanger with the third pipe, the third control valve is disposed on the third branch pipe for opening and closing the third branch pipe, and the fourth control valve is disposed on the fourth branch pipe for opening and closing the fourth branch pipe.

In one embodiment, the air conditioning system further includes a third connecting pipe and a fourth connecting pipe, the third connecting pipe is connected between the second opening of the first indoor heat exchanger and the first connecting pipe, and the fourth connecting pipe is connected between the fourth opening of the second indoor heat exchanger and the second connecting pipe.

In one embodiment, one end of the second pipe is communicated with the first branch pipe and the third branch pipe, and the other end of the second pipe can be communicated with a discharge port of the compressor or a return air port of the compressor;

one end of the third pipe is connected to the second branch pipe and the fourth branch pipe, and the other end of the third pipe is connected to a discharge port of the compressor.

In one embodiment, the air conditioning system further includes a second switching device that communicates the first pipe with the compressor discharge port and communicates the second pipe with the return port of the compressor in the dehumidification and reheat mode and the cooling mode;

in the heating mode, the second switching device communicates the second pipe with the discharge port of the compressor and communicates the first pipe with the return port of the compressor.

In one embodiment, the second switching device includes a first four-way valve for communicating the discharge port of the compressor with the first pipe, or a first four-way valve for communicating the return port of the compressor with the first pipe.

In one embodiment, the second switching device includes a second four-way valve for communicating a return port of the compressor with the second pipe, or a discharge port of the compressor with the second pipe.

In one embodiment, the first four-way valve has a first inlet, a first outlet, a second outlet and a third outlet, and the second four-way valve has a second inlet, a fourth outlet, a fifth outlet and a sixth outlet;

the first inlet and the second inlet are both communicated with a discharge port of the compressor, the first outlet is communicated with the first piping, the second outlet and the third outlet are both communicated with a return port of the compressor, the fourth outlet is communicated with the second piping, and the fifth outlet and the sixth outlet are both communicated with a return port of the compressor;

the first inlet can be switched to be communicated with the first outlet or the third outlet, the second inlet can be switched to be communicated with the fourth outlet or the sixth outlet, a capillary pipeline is arranged between the third outlet and the air return port of the compressor, and a capillary pipeline is arranged between the sixth outlet and the air return port of the compressor.

Drawings

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

FIG. 2 is a schematic diagram of the air conditioning system of FIG. 1 in a cooling mode;

fig. 3 is a system diagram illustrating a heating mode of the air conditioning system shown in fig. 1.

100. An air conditioning system; 10. a compressor; 12. an outlet port; 14. an air return port; 20. an outdoor heat exchanger; 30. a first indoor heat exchanger; 32. a first through opening; 34. a second through opening; 40. a second indoor heat exchanger; 41. a third through hole; 43. a fourth through opening; 52. a first piping; 54. a second piping; 56. a third piping; 60. a bleeder tube; 70. a first switching device; 72. a first connecting pipe; 721. a first branch pipe; 723. a second branch pipe; 73. a first control valve; 74. a second control valve; 75. a second connecting pipe; 752. a third branch pipe; 754. a fourth branch pipe; 76. a third control valve; 78. a fourth control valve; 81. a third connecting pipe; 83. a fourth connecting pipe; 90. a second switching device; 92. a first four-way valve; d₁A first inlet; c₁A first outlet; s₁A second outlet; e₁A third outlet; 94. a second four-way valve; d₂A second inlet; c₂A fourth outlet; s₂A fifth outlet; e₂And a sixth outlet.

Detailed Description

In order to make the aforementioned objects, features and advantages of the present invention comprehensible, embodiments accompanied with figures are described in detail below. In the following description, numerous specific details are set forth in order to provide a thorough understanding of the present invention. This invention may, however, be embodied in many different forms and should not be construed as limited to the embodiments set forth herein.

In the description of the present invention, it is to be understood that the terms "central," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," "axial," "radial," "circumferential," and the like are used in the orientations and positional relationships indicated in the drawings for convenience in describing the invention and to simplify the description, and are not intended to indicate or imply that the referenced device or element must have a particular orientation, be constructed and operated in a particular orientation, and are not to be considered limiting of the invention.

Furthermore, the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one such feature. In the description of the present invention, "a plurality" means at least two, e.g., two, three, etc., unless specifically limited otherwise.

In the present invention, unless otherwise expressly stated or limited, the terms "mounted," "connected," "secured," and the like are to be construed broadly and can, for example, be fixedly connected, detachably connected, or integrally formed; can be mechanically or electrically connected; they may be directly connected or indirectly connected through intervening media, or they may be connected internally or in any other suitable relationship, unless expressly stated otherwise. The specific meanings of the above terms in the present invention can be understood by those skilled in the art according to specific situations.

In the present invention, unless otherwise expressly stated or limited, the first feature "on" or "under" the second feature may be directly contacting the first and second features or indirectly contacting the first and second features through an intermediate. Also, a first feature "on," "over," and "above" a second feature may be directly or diagonally above the second feature, or may simply indicate that the first feature is at a higher level than the second feature. A first feature being "under," "below," and "beneath" a second feature may be directly under or obliquely under the first feature, or may simply mean that the first feature is at a lesser elevation than the second feature.

It will be understood that when an element is referred to as being "secured to" or "disposed on" another element, it can be directly on the other element or intervening elements may also be present. When an element is referred to as being "connected" to another element, it can be directly connected to the other element or intervening elements may also be present. The terms "vertical," "horizontal," "upper," "lower," "left," "right," and the like as used herein are for illustrative purposes only and do not denote a unique embodiment.

Referring to fig. 1-3, in an embodiment of the present invention, an air conditioning system 100 is provided, in which the air conditioning system 100 has a dehumidification and reheating mode, a cooling mode and a heating mode, the humidity of the indoor environment can be reduced in the dehumidification and reheating mode, the temperature of the indoor environment can be reduced in the cooling mode, the temperature of the indoor environment can be increased in the heating mode, and a user can select different working modes according to actual needs to meet various requirements for temperature and humidity.

The air conditioning system 100 includes a compressor 10, an outdoor heat exchanger 20, a first indoor heat exchanger 30, a second indoor heat exchanger 40, a first pipe 52, a second pipe 54, and a third pipe 56, the first indoor heat exchanger 30 has a first port 32 and a second port 34 for communicating with a user, the second indoor heat exchanger 40 has a third port 41 and a fourth port 43 communicating with each other, the first pipe 52 communicates with the first port 32 of the first indoor heat exchanger 30, the third port 41 of the second indoor heat exchanger 40, and the outdoor heat exchanger 20, and the third pipe 56 communicates with a discharge port 12 of the compressor 10. Referring to fig. 1, in the dehumidification and reheat mode, the first pipe 52 communicates with the discharge port 12 of the compressor 10, the second pipe 54 communicates the second port 34 of the first indoor heat exchanger with the return port 14 of the compressor 10, and the third pipe 56 communicates the discharge port 12 of the compressor 10 with the fourth port 43 of the second indoor heat exchanger 40. The high-pressure refrigerant discharged from the discharge port 12 of the compressor 10 is divided into two paths, one path of the high-pressure refrigerant enters the first indoor heat exchanger 30 from the first through hole 32 after being cooled by the outdoor heat exchanger 20 through the first piping 52, and the first indoor heat exchanger 30 with lower temperature can condense moisture in the air to reduce the humidity of the air; the other path enters the second indoor heat exchanger 40 from the fourth through port 43 through the third piping 56 to heat the air dehumidified by the first indoor heat exchanger 30, so that the dehumidification function is realized and the indoor air temperature is not too low. Finally, the refrigerant in the second indoor heat exchanger 40 is heat-exchanged and then introduced into the first pipe 52 from the third port 41, passes through the first indoor heat exchanger 30, and then enters the second pipe 54 from the second port 34 together with the refrigerant in the first indoor heat exchanger 30, and flows into the return air port 14 of the compressor 10, thereby completing the dehumidification-reheating cycle.

Referring to fig. 2, in the cooling mode, the first pipe 52 communicates with the discharge port 12 of the compressor 10, and the second port 34 of the first indoor heat exchanger 30 and the fourth port 43 of the second indoor heat exchanger 40 communicate with the return port 14 of the compressor 10 through the second pipe 54. The refrigerant discharged from the discharge port 12 of the compressor 10 enters the outdoor evaporator through the first pipe 52, is cooled, and then enters the first indoor heat exchanger 30 and the second indoor heat exchanger 40 through the first through port 32 and the third through port 41, the low-temperature refrigerant in the first indoor heat exchanger 30 and the second indoor heat exchanger 40 exchanges heat with the indoor air to reduce the indoor temperature, and then the refrigerant in the first indoor heat exchanger 30 and the second indoor heat exchanger 40 flows through the second pipe 54 through the second through port 34 and the fourth through port 43, and returns to the return air port 14 of the compressor 10, thereby completing the refrigeration cycle. The third pipe 56 is disconnected from the first indoor heat exchanger 30 and the second indoor heat exchanger, and the refrigerant flowing out of the discharge port 12 of the compressor 10 does not continue to enter the first indoor heat exchanger 30 and the second indoor heat exchanger 40 after entering the third pipe 56, so as to ensure normal cooling of the first indoor heat exchanger 30 and the second indoor heat exchanger 40.

However, when the third pipe 56 is switched from the connected state to the disconnected state, the refrigerant entering the third pipe 56 from the compressor 10 cannot flow out, the refrigerant accumulates in the third pipe 56, and if the refrigerant is often accumulated in the third pipe 56, the service life of the air conditioning system 100 is affected.

In order to solve the above problem, an air conditioning system 100 according to an embodiment of the present invention further includes a drain pipe 60, and the drain pipe 60 is connected between the first pipe 52 and the third pipe 56. In this way, when the air conditioning system 100 is switched to the cooling mode, the refrigerant having a high pressure accumulated in the third pipe 56 can be discharged into the first pipe 52 having a low refrigerant pressure through the drain pipe 60, and then can be merged with the refrigerant in the first pipe 52 and flow into the first indoor heat exchanger 30 and the second indoor heat exchanger 40 to circulate the refrigerant, thereby preventing the refrigerant from accumulating in the pipes inside the air conditioning system 100.

Alternatively, the bleed pipe 60 is a capillary tube, and the refrigerant in the third pipe 56 can be guided to the first pipe 52 by a pressure difference by the capillary tube, and the refrigerant in the first pipe 52 can be prevented from flowing backward into the third pipe 56.

Referring to fig. 3, further, the air conditioning system 100 also has a heating mode. In the heating mode, the second pipe 54 communicates the discharge port 12 of the compressor 10 with the second port 34 of the first indoor heat exchanger 30, the third pipe 56 communicates the discharge port 12 of the compressor 10 with the fourth port 43 of the second indoor heat exchanger 40, and the first pipe 52 communicates with the return port 14 of the compressor 10. The refrigerant discharged from the discharge port 12 of the compressor 10 is divided into two paths, one path enters the first indoor heat exchanger 30 from the second port 34 through the second pipe 54, the other path enters the second indoor heat exchanger 40 from the fourth port 43 through the third pipe 56, the refrigerant entering the first indoor heat exchanger 30 and the second indoor heat exchanger 40 exchanges heat with the indoor air to raise the temperature of the indoor environment, and then returns to the return air port 14 of the compressor 10 through the first pipe 52 from the first port 32 and the third port 41, respectively, so that the heating cycle of the refrigerant is realized.

In some embodiments, the air conditioning system 100 further includes a first switching device 70, the first switching device 70 is configured to control the second opening 34 of the first heat exchanger to be connected to and disconnected from the second pipe 54 and the third pipe 56, and the first switching device 70 is further configured to control the fourth opening 43 of the second heat exchanger to be connected to and disconnected from the second pipe 54 and the third pipe 56. In this way, the first switching device 70 can switch between the first heat exchanger and the second heat exchanger by controlling the second pipe 54 and the third pipe 56 to be connected to and disconnected from the first heat exchanger and the second heat exchanger, respectively, or by controlling the second pipe 54 and the third pipe 56 to be connected to and disconnected from the second heat exchanger and the first heat exchanger, respectively, according to the demand of the operating state. For example, in the dehumidification-reheat mode, the third pipe 56 communicates with the fourth port 43 of the second heat exchanger through the first switching device 70, and the second pipe 54 communicates with the second port 34 of the first heat exchanger through the first switching device 70, thereby realizing a dehumidification-reheat cycle; in the cooling mode, the first switching device 70 controls the second port 34 of the first heat exchanger and the fourth port 43 of the second heat exchanger to communicate with the second pipe 54, and the first switching device 70 cuts off the circulation paths of the third pipe 56 and the first and second heat exchangers to realize the cooling cycle; in the heating mode, the third pipe 56 communicates with the fourth port 43 of the second heat exchanger via the first switching device 70, and the second pipe 54 communicates with the second port 34 of the first heat exchanger via the first switching device 70, thereby realizing a heating cycle.

Further, the first switching device 70 includes a first connection pipe 72, a first control valve 73, and a second control valve 74, the first connection pipe 72 includes a first branch pipe 721 and a second branch pipe 723, the first branch pipe 721 communicates the second through port 34 of the first indoor heat exchanger 30 with the second pipe 54, the second branch pipe 723 communicates the second through port 34 of the first indoor heat exchanger 30 with the third pipe 56, the first control valve 73 is disposed on the first branch pipe 721 for opening and closing the first branch pipe 721, and the second control valve 74 is disposed on the second branch pipe 723 for opening and closing the second branch pipe 723. When the first control valve 73 is opened, the second port 34 and the second pipe 54 can be communicated through the first branch pipe 721, and when the second control valve 74 is opened, the second port 34 and the third pipe 56 can be communicated through the second branch pipe 723.

Further, the first switching device 70 further includes a second connection pipe 75, a third control valve 76 and a fourth control valve 78, the second connection pipe 75 includes a third branch pipe 752 and a fourth branch pipe 754, the third branch pipe 752 communicates the fourth opening 43 of the second indoor heat exchanger 40 with the second pipe 54, the fourth branch pipe 754 communicates the fourth opening 43 of the second indoor heat exchanger 40 with the third pipe 56, the third control valve 76 is disposed on the third branch pipe 752 for opening and closing the third branch pipe 752, the fourth control valve 78 is disposed on the fourth branch pipe 754 for opening and closing the fourth branch pipe 754, when the third control valve 76 is opened, the fourth opening 43 and the second pipe 54 can be communicated through the third branch pipe 752, and when the fourth control valve 78 is opened, the fourth opening 43 and the third pipe 56 can be communicated through the fourth branch pipe 754. In this way, the opening and closing of the first control valve 73, the second control valve 74, the third control valve 76, and the fourth control valve 78 can be adjusted according to the actual operating state, and different refrigerant flow paths can be formed by switching.

Further, the air conditioning system 100 further includes a third connection pipe 81 and a fourth connection pipe 83, the third connection pipe 81 is connected between the second opening 34 of the first indoor heat exchanger 30 and the first connection pipe 72, and the fourth connection pipe 83 is connected between the fourth opening 43 of the second indoor heat exchanger 40 and the second connection pipe 75, so as to connect the first indoor heat exchanger 30 and the second indoor heat exchanger 40 with the first switching device 70 through the third connection pipe 81 and the fourth connection pipe 83.

One end of the second pipe 54 communicates with the first branch pipe 721 and the third branch pipe 752, and the other end of the second pipe 54 can communicate with the discharge port 12 of the compressor 10 or the return port 14 of the compressor 10; one end of the third pipe 56 communicates with the second branch pipe 723 and the fourth branch pipe 754, and the other end of the third pipe 56 is connected to the discharge port 12 of the compressor 10. In the dehumidification and reheat mode, the fourth branch pipe 754 communicates with the fourth port 43, the second pipe 54 communicates with the return port 14 of the compressor 10, and one path of the refrigerant flowing out of the compressor 10 passes through the third pipe 56, enters the second indoor heat exchanger 40 from the fourth branch pipe 754, and the other path passes through the first pipe 52, passes through the outdoor heat exchanger 20, and enters the first indoor heat exchanger 30. In the cooling mode, the second pipe 54 communicates with the return port 14 of the compressor 10, the first branch pipe 721 communicates with the second passing port 34, and the third branch pipe 752 communicates with the fourth passing port 43, so that the refrigerant flowing out of the compressor 10 passes through the outdoor heat exchanger 20 via the first pipe 52, enters the first indoor heat exchanger 30 and the second indoor heat exchanger 40, finally converges on the second pipe 54 via the first branch pipe 721 and the third branch pipe 752, and returns to the return port 14 of the compressor 10. In the heating mode, the second pipe 54 communicates with the discharge port 12 of the compressor 10, the first pipe 52 communicates with the return port 14 of the compressor 10, one path of the refrigerant flowing out of the compressor 10 enters the second indoor heat exchanger 40 through the third pipe 56, the other path enters the second indoor heat exchanger 40 through the second pipe 54, and finally the refrigerant in the first indoor heat exchanger 30 and the second indoor heat exchanger 40 is collected in the first pipe 52 and returned to the compressor 10.

In some embodiments, the air conditioning system 100 further comprises a second switching device 90, wherein the second switching device 90 communicates the first pipe 52 with the discharge port 12 of the compressor 10 and communicates the second pipe 54 with the return port 14 of the compressor 10 in the dehumidification reheating mode and the cooling mode; in the heating mode, the second switching device 90 communicates the second pipe 54 with the discharge port 12 of the compressor 10 and communicates the first pipe 52 with the return port 14 of the compressor 10, so that the second switching device 90 switches the first pipe 52 and the second pipe 54 to communicate with the discharge port 12 and the return port 14 of the compressor 10, or switches the first pipe 52 and the second pipe 54 to communicate with the return port 14 and the discharge port 12 of the compressor 10, respectively, to meet the flow requirements of the refrigerant in different states of the air conditioning system 100.

Further, the second switching device 90 includes a first four-way valve 92, and the first four-way valve 92 is used for communicating the discharge port 12 of the compressor 10 with the first pipe 52, or the first four-way valve 92 is used for communicating the return port 14 of the compressor 10 with the first pipe 52. The second switching device 90 further includes a second four-way valve 94, and the second four-way valve 94 is used for communicating the return port 14 of the compressor 10 with the second pipe 54, or the second four-way valve 94 is used for communicating the discharge port 12 of the compressor 10 with the second pipe 54. In the dehumidification reheating mode and the cooling mode, the first four-way valve 92 communicates the discharge port 12 of the compressor 10 with the first pipe 52, and the second four-way valve 94 communicates the return port 14 of the compressor 10 with the second pipe 54. In the heating mode, the first four-way valve 92 communicates the return port 14 of the compressor 10 with the first pipe 52, and the second four-way valve 94 communicates the discharge port 12 of the compressor 10 with the second pipe 54. Thus, the switching of the refrigerant flow path is realized.

Specifically, the first four-way valve 92 has a first inlet D₁A first outlet C₁A second outlet S₁And a third outlet E₁And a second four-way valve 94 having a second inlet D₂And a fourth outlet C₂A fifth outlet S₂And a sixth outlet E₂(ii) a First inlet D₁And a second inlet D₂Are all communicated with the discharge port 12 of the compressor 10, and a first outlet C₁A second outlet S communicated with the first pipe 52₁And a third outlet E₁Are all communicated with a return air port 14 of the compressor 10, and a fourth outlet C₂A fifth outlet S communicated with the second pipe 54₂And a sixth outlet E₂Are in communication with the return port 14 of the compressor 10. First inlet D₁Can be switched to and connected with the first outlet C₁Or a third outlet E₁Communication, second inlet D₂Can be switched to and from the fourth outlet C₂Or a sixth outlet E₂Communication, third outlet E₁A capillary channel is arranged between the air return port 14 of the compressor 10 and a sixth outlet E₂A capillary channel is provided between the return port 14 of the compressor 10.

When the first inlet D is₁And a first outlet C₁Communication, second inlet D₂And a sixth outlet E₂When communicating, the refrigerant passes through the first inlet D₁And a first outlet C₁Enters the first pipe 52 and the refrigerant enters the second inlet D₂Then, because of the sixth outlet E₂The first pipe 52 is connected to the discharge port 12 of the compression molding machine and the second pipe 54 is connected to the fourth outlet C through a capillary tube provided between the first pipe and the return port 14 of the compressor 10 to prevent the refrigerant from flowing₂And a fifth outlet S₂Communicating with the return port 14 of the compressor 10.

When the first inlet D is₁And a third outlet E₁Communication, second inlet D₂And a fourth outlet C₂When communicating, the refrigerant passes through the second inlet D₂And a fourth outlet C₂Enters the second pipe 54 and the refrigerant enters the first inlet D₁Then, because of the third outlet E₁And a compressor 1The capillary channel between the return air ports 14 of 0 prevents the refrigerant from flowing, so that the second piping 54 is communicated with the discharge port 12 of the compression molding machine, and the first piping 52 is communicated with the third outlet E₁And a second outlet S₁Communicating with the return port 14 of the compressor 10.

The air conditioning system 100 has a dehumidification reheating mode, a cooling mode, and a heating mode. In the dehumidification reheating mode, the second switching device 90 communicates the first pipe 52 with the discharge port 12 of the compressor 10, and communicates the second pipe 54 with the return port 14 of the compressor 10; the first switching device 70 communicates the second pipe 54 with the first indoor heat exchanger 30, and communicates the third pipe 56 with the second indoor heat exchanger 40. In the cooling mode, the second switching device 90 communicates the first pipe 52 with the discharge port 12 of the compressor 10, and communicates the second pipe 54 with the return port 14 of the compressor 10; the first switching device 70 communicates the second pipe 54 with the first indoor heat exchanger 30 and the second indoor heat exchanger 40, and disconnects the third pipe 56 from the first indoor heat exchanger 30 and the second indoor heat exchanger 40. In the heating mode, the second switching device 90 communicates the first pipe 52 with the return port 14 of the compressor 10, and communicates the second pipe 54 with the discharge port 12 of the compressor 10; the first switching device 70 communicates the second pipe 54 with the first indoor heat exchanger 30, and communicates the third pipe 56 with the second indoor heat exchanger 40.

In addition, a leakage pipe 60 is provided between the first pipe 52 and the third pipe 56, and specifically, the leakage pipe 60 is a capillary tube, so that the refrigerant accumulated in the third pipe 56 can be guided to the first pipe 52 to flow in the cooling mode, and the influence on the service life of the air conditioning system 100 due to the frequent accumulation of the refrigerant in the third pipe 56 can be prevented.

The technical features of the embodiments described above may be arbitrarily combined, and for the sake of brevity, all possible combinations of the technical features in the embodiments described above are not described, but should be considered as being within the scope of the present specification as long as there is no contradiction between the combinations of the technical features.

The above-mentioned embodiments only express several embodiments of the present invention, and the description thereof is more specific and detailed, but not construed as limiting the scope of the invention. It should be noted that, for a person skilled in the art, several variations and modifications can be made without departing from the inventive concept, which falls within the scope of the present invention. Therefore, the protection scope of the present patent shall be subject to the appended claims.