阅读说明：本技术 压缩机组件及空调系统 (Compressor assembly and air conditioning system ) 是由 廖四清 曾令华 王小龙 杨宇飞 于 2018-08-31 设计创作，主要内容包括：本发明提供一种压缩机组件及空调系统,压缩机组件包括压缩机及切换装置；压缩机包括压缩机壳体及位于压缩机壳体内的压缩机主体,压缩机主体包括具有第一吸气口和第一排气口的第一压缩腔以及具有第二吸气口和第二排气口的第二压缩腔；切换装置包括设置有第一接口、第二接口以及第三接口的主体部,其中第一接口设置为能够接收来自第一压缩腔的第一排气口的排气,第三接口与第二压缩腔的第二吸气口连接,且第一接口能够在与第二接口连通以及与第三接口连通之间切换。本发明提供的压缩机组件及空调系统,可以在制热的同时进行除霜,有利于提高用户的舒适度,不会造成忽冷忽热的感受,而且在不除霜时,压缩机可以进行两级压缩,可以提升制热效率。(The invention provides a compressor assembly and an air conditioning system, wherein the compressor assembly comprises a compressor and a switching device; the compressor comprises a compressor shell and a compressor main body positioned in the compressor shell, wherein the compressor main body comprises a first compression cavity with a first air suction port and a first air exhaust port and a second compression cavity with a second air suction port and a second air exhaust port; the switching device comprises a main body part provided with a first interface, a second interface and a third interface, wherein the first interface is arranged to be capable of receiving exhaust from a first exhaust port of the first compression cavity, the third interface is connected with a second air suction port of the second compression cavity, and the first interface can be switched between being communicated with the second interface and being communicated with the third interface. The compressor assembly and the air conditioning system provided by the invention can defrost while heating, are beneficial to improving the comfort level of users, cannot cause the feeling of sudden cooling and sudden heating, and can perform two-stage compression when not defrosting, thereby improving the heating efficiency.)

1. A compressor assembly, comprising a compressor and a switching device;

the compressor comprises a compressor housing (3) and a compressor body located in the compressor housing (3), the compressor body comprising a first compression chamber (1) having a first suction port (11) and a first discharge port (12) and a second compression chamber (2) having a second suction port (21) and a second discharge port (22);

the switching device comprises a main body part (4) provided with a first interface (41), a second interface (42) and a third interface (43), wherein the first interface (41) is arranged to be capable of receiving exhaust air from the first exhaust port (12) of the first compression chamber (1), the third interface (43) is connected with the second air suction port (21) of the second compression chamber (2), and the first interface (41) can be switched between communicating with the second interface (42) and communicating with the third interface (43).

2. -compressor assembly according to claim 1, characterised in that the first discharge opening (12) of the first compression chamber (1) is connected with the first interface (41), the second discharge opening (22) of the second compression chamber (2) is connected to the inside of the compressor housing (3) and the compressor housing (3) has a discharge opening (31) thereon; alternatively, the first and second electrodes may be,

the first exhaust port (12) of the first compression chamber (1) is communicated to the inside of the compressor housing (3), the first port (41) is communicated to the inside of the compressor housing (3), and the second exhaust port (22) of the second compression chamber (2) is communicated to the outside of the compressor housing (3).

3. The compressor assembly according to claim 1 or 2, wherein the main body portion (4) further has a fourth port (44), the fourth port (44) being arranged such that the third port (43) communicates with the fourth port (44) when the first port (41) communicates with the second port (42), and the second port (43) is disconnected from the fourth port (44) when the first port (41) communicates with the third port (44).

4. -compressor assembly according to claim 3, characterised in that the main body (4) is a four-way valve having the first interface (41), the second interface (42), the third interface (43) and the fourth interface (44);

and a switching valve or a second one-way valve (5) is arranged on the pipeline connected with the second port (42), and the second one-way valve (5) is arranged to only allow the fluid to flow from the second port (42) to the direction away from the first port (41) when in an opening state.

5. -compressor assembly according to claim 3, characterised in that the main body (4) comprises a line with the first (41), second (42), third (43) and fourth (44) interfaces, which are connected to each other, wherein a first on-off valve (45) is arranged between the first (41) and second (41) interfaces and a second on-off valve (46) is arranged between the first (41) and third (43) interfaces;

a switching valve or a first one-way valve (47) is arranged between the third port (43) and the fourth port (44), the first one-way valve (47) being arranged to allow fluid to flow from the fourth port (44) to the third port (43) when opened;

and a switching valve or a second one-way valve (5) is arranged on the pipeline connected with the second port (42), and the second one-way valve (5) is arranged to only allow the fluid to flow from the second port (42) to the direction away from the first port (41) when in an opening state.

6. Compressor assembly according to claim 3, wherein the body part (4) is located inside the compressor housing (3) or outside the compressor housing (3).

7. Air conditioning system, characterized in that it comprises a compressor assembly (100) according to any one of claims 3 to 6.

8. Air conditioning system according to claim 7, characterized in that it comprises an indoor heat exchanger (200) and an outdoor heat exchanger (300), the inlet of said indoor heat exchanger (200) being connected to said compressor to be able to receive the discharge air from said second discharge opening (22) of said second compression chamber, said second interface (42) of said switching device being connected to the inlet of said outdoor heat exchanger (300);

the compressor further comprises a liquid storage device (6), an outlet of the outdoor heat exchanger (300) is connected with an inlet (61) of the liquid storage device (6), and an outlet (62) of the liquid storage device (6) is respectively connected with the first air suction port (11) of the first compression cavity (1) and the fourth interface (44) of the switching device.

9. The air conditioning system as claimed in claim 7, wherein the air conditioning system comprises an indoor heat exchanger (200), an outdoor heat exchanger (300), and a four-way valve (500);

the compressor further comprises an accumulator (6), an outlet (62) of the accumulator (6) is respectively connected with the first air suction port (11) of the first compression chamber (1) and the fourth interface (44) of the switching device;

four ports of the four-way valve (500) are respectively connected with the exhaust port (31) of the compressor housing (3), the indoor heat exchanger (200), the outdoor heat exchanger (300) and an inlet (61) of the accumulator (6) so that a refrigerant can change a flow direction in a circulation loop among the compressor assembly (100), the indoor heat exchanger (200) and the outdoor heat exchanger (300).

10. Air conditioning system according to claim 8 or 9, characterized in that it further comprises an air make-up device (400);

the air supplement device (400) is provided with a first port (401) used for being connected with the indoor heat exchanger (200), a second port (402) used for being connected with the outdoor heat exchanger (300) and a third port (403) used for supplementing air to the second compression cavity (2);

a first throttling element (404) is arranged between the first port (401) and the indoor heat exchanger (200), and a second throttling element (405) is arranged between the second port (402) and the outdoor heat exchanger (300).

Technical Field

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

Background

Disclosure of Invention

In view of the above, the present invention is directed to a compressor assembly and an air conditioning system, so as to solve the problems of long defrosting time, incapability of continuous heating, and the like in the conventional defrosting manner for an outdoor heat exchanger.

In order to achieve the purpose, the technical scheme of the invention is realized as follows:

the invention provides a compressor assembly, which comprises a compressor and a switching device, wherein the compressor is provided with a compressor body and a switching device;

the compressor comprises a compressor shell and a compressor body positioned in the compressor shell, wherein the compressor body comprises a first compression cavity with a first suction port and a first exhaust port and a second compression cavity with a second suction port and a second exhaust port;

the switching device comprises a main body part provided with a first interface, a second interface and a third interface, wherein the first interface is arranged to be capable of receiving exhaust from the first exhaust port of the first compression cavity, the third interface is connected with the second air suction port of the second compression cavity, and the first interface can be switched between communication with the second interface and communication with the third interface.

Preferably, the first exhaust port of the first compression chamber is connected with the first interface, the second exhaust port of the second compression chamber is communicated to the interior of the compressor shell, and the compressor shell is provided with an exhaust port; alternatively, the first and second electrodes may be,

the first exhaust port of the first compression chamber is communicated to the inside of the compressor shell, the first interface is communicated to the inside of the compressor shell, and the second exhaust port of the second compression chamber is communicated to the outside of the compressor shell.

Preferably, the main body further has a fourth port, and the fourth port is configured to be communicated with the third port when the first port is communicated with the second port, and to be disconnected from the fourth port when the first port is communicated with the fourth port.

Preferably, the main body is a four-way valve having the first port, the second port, the third port, and the fourth port.

And a switching valve or a second one-way valve is arranged on a pipeline connected with the second interface, and the second one-way valve is set to only allow fluid to flow from the second interface to a direction away from the first interface in an opening state.

Preferably, the main body part comprises a pipeline which is provided with the first interface, the second interface, the third interface and the fourth interface and is connected with each other, wherein a first switch valve is arranged between the first interface and the second interface, and a second switch valve is arranged between the first interface and the third interface;

a switch valve or a first one-way valve is arranged between the third port and the fourth port, and the first one-way valve is set to allow fluid to flow from the fourth port to the third port when the first one-way valve is opened;

and a switching valve or a second one-way valve is arranged on a pipeline connected with the second interface, and the second one-way valve is set to only allow fluid to flow from the second interface to a direction away from the first interface in an opening state.

Preferably, the body portion is located inside the compressor housing or outside the compressor housing.

According to another aspect of the present invention, there is also provided an air conditioning system comprising a compressor assembly as described above;

preferably, the air conditioning system comprises an indoor heat exchanger and an outdoor heat exchanger, an inlet of the indoor heat exchanger is connected with the compressor to receive exhaust air from the second exhaust port of the second compression chamber, and the second interface of the switching device is connected with an inlet of the outdoor heat exchanger;

the compressor further comprises a liquid storage device, an outlet of the outdoor heat exchanger is connected with an inlet of the liquid storage device, and an outlet of the liquid storage device is connected with the first air suction port of the first compression cavity and the fourth interface of the switching device respectively.

Preferably, the air conditioning system comprises an indoor heat exchanger, an outdoor heat exchanger and a four-way valve;

the compressor further comprises a liquid storage device, and an outlet of the liquid storage device is respectively connected with the first air suction port of the first compression cavity and the fourth interface of the switching device;

four interfaces of the four-way valve are respectively connected with the air outlet of the compressor shell, the indoor heat exchanger, the outdoor heat exchanger and the inlet of the liquid accumulator so that the flowing direction of the refrigerant can be changed in a circulating loop among the compressor assembly, the indoor heat exchanger and the outdoor heat exchanger.

Preferably, the air conditioning system further comprises an air supplementing device;

the air supplementing device is provided with a first port connected with the indoor heat exchanger, a second port connected with the outdoor heat exchanger and a third port used for supplementing air to the second compression cavity;

a first throttling element is arranged between the first port and the indoor heat exchanger, and a second throttling element is arranged between the second port and the outdoor heat exchanger.

The compressor assembly and the air conditioning system provided by the invention can defrost the outdoor heat exchanger while heating, are beneficial to improving the comfort of users, and cannot cause the feeling of sudden cooling and sudden heating. When defrosting is not needed, the compressor can realize two-stage compression, so that the heating efficiency of the air-conditioning system is greatly improved.

Additional features and advantages of the invention will be set forth in the detailed description which follows.

Drawings

The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate an embodiment 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 an air conditioning system including a compressor assembly according to the present invention according to one embodiment of the present invention;

FIG. 2 is a schematic structural view of an air conditioning system according to another embodiment;

fig. 3 is a schematic structural view of an air conditioning system according to still another embodiment.

Description of reference numerals:

100-a compressor assembly; 1-a first compression chamber; 11-a first suction port; 12-a first exhaust port; 2-a second compression chamber; 21-second suction port; 22-a second exhaust port; 3-a compressor housing; 31-an exhaust port; 4-a body portion; 41-a first interface; 42-a second interface; 43-a third interface; 44-a fourth interface; 45-a first on-off valve; 46-a second on-off valve; 47-a first one-way valve; 5-a second one-way valve; 6-a liquid reservoir; 61-an inlet; 62-an outlet; 200-indoor heat exchanger; 300-outdoor heat exchanger; 400-air supplement device; 401 — a first port; 402-a second port; 403-a third port; 404-a first throttling element; 405-a second throttling element.

Detailed Description

The following detailed description of embodiments of the invention refers to the accompanying drawings. It should be understood that the detailed description and specific examples, while indicating the present invention, are given by way of illustration and explanation only, not limitation.

In addition, the embodiments of the present invention and the features of the embodiments may be combined with each other without conflict.

In the description of the present invention, it is to be understood that the terms "central", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "left", "right", "vertical", "horizontal", "top", "bottom", "axial", "radial", "circumferential", and the like, indicate orientations and positional relationships based on those shown in the drawings, and are used merely for convenience of description and for simplicity of description, and do not indicate or imply that the referenced device or element must have a particular orientation, be constructed and operated in a particular orientation, and thus, are not to be construed as limiting the present invention. The term "inside" and "outside" refer to the inside and the outside of the contour of each member itself.

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.

The present invention provides a compressor assembly (reference number 100 in fig. 1-3), the compressor assembly 100 includes a compressor and a switching device, as shown in fig. 1: the compressor includes a compressor housing 3 and a compressor body in the compressor housing 3, the compressor body including a first compression chamber 1 having a first suction port 11 and a first discharge port 12 and a second compression chamber 2 having a second suction port 21 and a second discharge port 22.

The switching device includes a main body portion 4 provided with a first port 41, a second port 42, and a third port 43, wherein the first port 41 is provided so as to be able to receive exhaust gas from the first exhaust port 12 of the first compression chamber 1, the third port 43 is connected to the second intake port 21 of the second compression chamber 2, and the first port 41 is able to switch between communication with the second port 42 and communication with the third port 43.

When the compressor assembly 100 provided by the present invention is applied to an air conditioning system, the second port 42 of the switching device is connected to the outdoor heat exchanger, and the refrigerant is input into the first compression chamber 1 from the first air intake 11 of the first compression chamber 1. Thus, when the outdoor heat exchanger is defrosted, the switching device is switched to connect the first port 41 and the second port 42, the first port 41 receives the high-pressure superheated gas compressed in the first compression cavity 1 and transmits the high-pressure superheated gas to the outdoor heat exchanger from the second port 42, so that the outdoor heat exchanger can be defrosted, and after the refrigerant is input into the second suction port 21 of the second compression cavity 2, the gas compressed in the second compression cavity 2 is discharged from the second discharge port 22 and is transmitted to the indoor heat exchanger through a pipeline to heat the indoor space. Therefore, by arranging the compressor assembly, the air conditioning system can realize heating while defrosting, thereby being beneficial to improving the comfort of users and avoiding the feeling of sudden cooling and sudden heating. When defrosting is not needed, the switching device is switched to enable the first interface 41 to be communicated with the third interface 43, so that exhaust gas of the first exhaust port 12 of the first compression cavity 1 can enter the second air suction port 21 of the second compression cavity 2 through the third interface 43 after entering the first interface 41, and refrigerant is discharged from the second exhaust port 22 of the second compression cavity 2 after passing through the two-stage compressors of the first compression cavity 1 and the second compression cavity 2, so that two-stage compression is realized, the indoor unit is heated through the two-stage compression of the compressors, and the heating efficiency is high.

In one embodiment of the present invention, as shown in fig. 1, the first exhaust port 12 of the first compression chamber 1 is connected to the first port 41 so that the gas discharged from the first exhaust port 12 can directly enter the first port 41, the second exhaust port 22 of the second compression chamber 2 is connected to the inside of the compressor housing 3 and the compressor housing 3 has an exhaust port 31, so that the exhaust gas from the second exhaust port 22 is discharged to the inside of the compressor housing 3 and then discharged from the exhaust port 31 of the compressor housing 3.

Of course, the first port 41 of the switching device may receive the discharge air of the first compression chamber directly from the first discharge port of the first compression chamber, or may receive the discharge air of the first compression chamber indirectly. For example, in another embodiment, the first exhaust port 12 of the first compression chamber 1 may be communicated to the inside of the compressor housing 3, the first port 41 may be communicated to the inside of the compressor housing 3, and the second exhaust port 22 of the second compression chamber 2 may be communicated to the outside of the compressor housing 3. In this way, the exhaust gas of the first compression chamber 1 is discharged to the inside of the compressor housing 3, and can absorb the heat of the motor inside the compressor housing, and then enter the first interface 41 of the switching device, and the gas absorbing the heat inside the compressor housing can more effectively defrost the outdoor heat exchanger after entering the first interface 41 and being conveyed to the outdoor heat exchanger because the temperature is higher.

In the present embodiment, as shown in fig. 1, the main body portion 4 of the switching device further includes a fourth port 44, and the fourth port 44 is provided such that the third port 43 communicates with the fourth port 44 when the first port 41 communicates with the second port 42, and the third port 43 is disconnected from the fourth port 44 when the first port 41 communicates with the fourth port 44. The body portion 4 may be disposed inside the compressor housing 3 or may be disposed outside the compressor housing 3, as shown in fig. 1 where the body portion 4 is disposed outside.

When the compressor assembly 100 is used in an air conditioning system, the fourth port 44 is connected to the outlet 62 of the accumulator 6 of the compressor, so that the refrigerant gas in the accumulator 6 can be introduced from the fourth port 44 to the third port 43, and then enter the second suction port 21 of the second compression chamber 2 from the third port 43. In the defrosting mode, the refrigerant compressed in the first compression chamber 1 is used for defrosting, and the refrigerant compressed in the second compression chamber 2 is used for heating. In the non-defrost mode, the fourth port 43 is disconnected from the third port 43, so that the third port 43 receives only the refrigerant transmitted from the first compression chamber 1 through the first port 41, and the refrigerant is compressed in two stages.

Further, the main body portion 4 of the switching device may be a four-way valve having the first port 41, the second port 42, the third port 43, and the fourth port 44, the four-way valve being capable of switching to make the first port 41 communicate with the second port 42 or to make the first port 41 communicate with the third port 43, and the four-way valve being configured such that the third port 43 communicates with the fourth port 44 when the first port 41 communicates with the second port 42, and the third port 43 is disconnected from the fourth port 44 when the first port 41 communicates with the fourth port 44.

Of course, in another embodiment, a valve may be disposed on a pipeline having a plurality of ports to open and close each port.

For example, in the embodiment shown in fig. 2, a mutually connected pipeline having a first port 41, a second port 42, a third port 43 and a fourth port 44 may be provided, and a first on-off valve 45 may be provided between the first port 41 and the second port 42, and a second on-off valve 46 may be provided between the first port 41 and the third port 43, so that the first port 41 may be selectively communicated to the second port 42 or the third port 43 by the on-off of the first on-off valve 45 and the second on-off valve 46.

In addition, the third port 43 and the fourth port 44 are connected, a first check valve 47 is arranged between the third port 43 and the fourth port 44, and the first check valve 47 is arranged to allow fluid to flow from the fourth port 44 to the third port 43 when opened, but the first single valve 47 may be replaced by other types of on-off valves. When the first port 41 is communicated with the second port 42 when the first on-off valve 45 is opened and the second on-off valve 46 is closed, the gas of the fourth port 44 may flow to the third port 43 through the first check valve 47, and when the first port 41 is communicated with the third port 43 when the first on-off valve 45 is closed and the second on-off valve 46 is opened, the first check valve 47 between the third port 43 and the fourth port 44 may prevent the gas from flowing from the third port 43 to the fourth port 44.

The fourth port 44 is provided in the embodiment provided above, in order to introduce the refrigerant gas of the accumulator 6 into the third port 43 through the fourth port 44, and then into the second compression chamber 2 through the third port 43. It will be understood by those skilled in the art that the switching device may introduce the refrigerant of the accumulator 6 into the second compression chamber 2 by other means than providing the fourth port 44, for example, a direct connection line may be provided between the outlet 62 of the accumulator 6 and the second suction port 21, and a switching valve may be provided on the connection line.

In the present embodiment, as shown in fig. 1, the switching device further includes a second check valve 5 provided in a pipeline to which the second port 42 is connected, and the second check valve 5 is provided to allow fluid to flow from the second port 42 in a direction away from the first port 41 in an open state, but the second check valve 5 may be replaced with another type of on-off valve.

According to another aspect of the present invention, there is also provided an air conditioning system comprising a compressor assembly 100 as described above.

As shown in fig. 1 and 2, the air conditioning system includes an indoor heat exchanger 200 and an outdoor heat exchanger 300, an inlet of the indoor heat exchanger 200 is connected to the compressor (for example, in the present embodiment, connected to the discharge port 31 of the compressor housing 3, or directly connected to the second discharge port 22 of the second compression chamber 2) so as to be able to receive discharge air from the second discharge port 22 of the second compression chamber 2, and the second port 42 of the switching device is connected to an inlet of the outdoor heat exchanger 300.

The compressor further comprises an accumulator 6, an outlet 300 of the outdoor heat exchanger is connected with an inlet 61 of the accumulator 6, and an outlet 62 of the accumulator 6 is respectively connected with the first air suction port 11 of the first compression chamber 1 and the fourth interface 44 of the switching device.

Preferably, the air conditioning system further comprises an air supplement device 400; the gas supplementing device 400 has a first port 401 for connection with the indoor heat exchanger 200, a second port 402 for connection with the outdoor heat exchanger 300, and a third port 403 for supplementing gas to the first compression chamber 2, wherein the third port 403 can be connected to the first exhaust port 11 of the first compression chamber 2, i.e. the exhaust gas of the first exhaust port 11 and the supplementing gas of the gas supplementing device 400 can be delivered to the second compression chamber 2 together. In addition, a first throttling element 404 is disposed between the first port 401 and the indoor heat exchanger 200, and a second throttling element 405 is disposed between the second port 402 and the outdoor heat exchanger 300, so as to control the flow rate respectively.

Of course, it can be understood by those skilled in the art that the above-mentioned switching device may also introduce the refrigerant of the accumulator 6 into the second compression chamber 2 by other means without providing the fourth port 44, and therefore, the present invention may also provide an air conditioning system of another embodiment, which is different from the air conditioning system of the above-mentioned embodiment in that the gas of the accumulator 6 is not communicated into the second compression chamber 2 through the fourth port 44 of the switching device, but the outlet of the accumulator 6 may be directly communicated to the second compression chamber 2 through a pipeline.

The following describes the operation of the air conditioning system according to the embodiment shown in fig. 1 and 2:

in the normal heating mode, the switching device of the compressor assembly 100 is switched to communicate the first port 41 with the third port 43. When the compressor works, the refrigerant from the outlet 62 of the accumulator 6 enters the first compression chamber 1 through the first suction port 11 (at this time, the refrigerant entering the fourth port 44 from the accumulator 6 cannot enter the second compression chamber 2 through the third port 43 because the fourth port 44 is disconnected from the third port 43), the refrigerant entering the first compression chamber 1 is compressed and then discharged from the first discharge port 12, then enters the second air suction port 21 of the second compression chamber 2 through the first port 41 and the third port 43 of the switching device, is compressed in the second compression chamber 2, is discharged into the compressor housing 3 through the second discharge port 22, and is finally discharged through the discharge port 31 of the compressor housing 3, and the refrigerant compressed in two stages enters the indoor heat exchanger 200, the refrigerant circulates to the outdoor heat exchanger 300, and then returns to the accumulator 6 from the outdoor heat exchanger 300. During the operation of the air conditioning system, the air make-up device 400 makes up air to the second compression cavity 2 of the compressor through the third port 403, specifically, the air coming out from the third port 403 reaches the pipeline at the first exhaust port 12 of the first compression cavity 1, and then flows to the second compression cavity 2 from the first exhaust port 12, that is, the air sucked by the second compression cavity 2 is exhausted from the first compression cavity 1, and a part of the air comes from the air make-up device 400, so that the energy efficiency of the system can be greatly improved.

When defrosting of the outdoor heat exchanger 300 is required, the switching device switches the first port 41 to communicate with the second port 42. In operation, at this time, the refrigerant from the outlet 62 of the accumulator 6 enters the first compression chamber 1 through the first air intake 11 via one branch, and reaches the fourth port 44 of the switching device via the other branch. The high-pressure superheated gas compressed in the first compression chamber 1 is discharged from the first discharge port 12, and then flows to the outdoor heat exchanger 300 through the first and second ports 41 and 42 of the switching device in sequence, so that the outdoor heat exchanger 300 can be defrosted. Since the fourth port 44 is communicated with the third port 43, the refrigerant reaching the fourth port 44 may enter the second compression chamber 2 through the third port 43, and the refrigerant compressed in the second compression chamber 2 enters the indoor heat exchanger 200 to heat the indoor space. Thus, the indoor heating is realized while defrosting.

The air conditioning system shown in fig. 1 and 2 has only a heating function, and if the air conditioning system needs to have a cooling function at the same time, the switching between heating and cooling can be realized only by adding a four-way valve, as shown in fig. 3.

As shown in fig. 3, the air conditioning system includes an indoor heat exchanger 200, an outdoor heat exchanger 300, and a four-way valve 500, the compressor further includes an accumulator 6, and an outlet 62 of the accumulator 6 is respectively connected to the first air intake 11 of the first compression chamber 1 and the fourth interface 44 of the switching device; four interfaces of the four-way valve 500 are respectively connected with the exhaust port 31 of the compressor housing 3, the indoor heat exchanger 200, the outdoor heat exchanger 300 and the inlet 61 of the liquid reservoir 6 so that a refrigerant can change a flow direction in a circulation loop among the compressor assembly 100, the indoor heat exchanger 200 and the outdoor heat exchanger 300, wherein a specific connection mode of the four-way valve 500 and the exhaust port 31, the indoor heat exchanger 200, the outdoor heat exchanger 300 and the inlet 61 of the liquid reservoir 6 belongs to a common technology in the field and is not described herein again.

The four-way valve 500 is switched to a heating mode, and exhaust gas at the exhaust port 31 of the compressor housing 3 enters the indoor heat exchanger 200, circulates from the indoor heat exchanger 200 to the outdoor heat exchanger 300, and then enters the liquid reservoir 6 of the compressor from the outdoor heat exchanger 300, so that indoor heating can be realized. When defrosting is required, the switching device may be switched to communicate the first port 41 and the second port 42 as described above.

The four-way valve 500 is switched to the cooling mode, and the exhaust gas at the exhaust port 31 of the compressor housing 3 enters the outdoor heat exchanger 300, circulates to the indoor heat exchanger 200 from the outdoor heat exchanger 300, and enters the liquid reservoir 6 of the compressor from the indoor heat exchanger 200, so that indoor cooling can be realized.

The above description is only for the purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the invention, and any modifications, equivalents, improvements and the like that fall within the spirit and principle of the present invention are intended to be included therein.