Air conditioning system

Abstract

The present application relates to a kind of air conditioning systems, air conditioning system includes outdoor unit (1) including compressor (11), with the outdoor heat exchanger (12) of compressor (11) connection, with the first refrigerant port (13) of outdoor heat exchanger (12) connection, with the second refrigerant port (14) of the exhaust port of compressor (11) connection and with the third refrigerant port (15) of the suction port of compressor (11);First pipeline (2), with the first refrigerant port (13) of outdoor unit (1) connection;Second pipeline (3), with the second refrigerant port (14) of outdoor unit (1) connection;Third pipeline (4), with the third refrigerant port (15) of outdoor unit (1) connection;And single mode indoor unit (5) is configured to only have refrigeration working mode, the single mode indoor unit (5) includes with the import of first pipeline (2) connection and with the export of third pipeline (3) connection.

Description

Technical Field

[0001] This invention relates to the field of air conditioning technology, and more specifically, to an air conditioning system. Background Technology

[0002] In existing heat recovery multi-split outdoor unit systems, the outdoor unit is a three-pipe system. All indoor units and outdoor units need to be connected to a mode converter to switch the operating modes of the indoor units, enabling the function of cooling some rooms and heating others.

[0003] In many existing heat recovery multi-split air conditioning systems, there are often rooms that are typically used for year-round cooling (such as equipment rooms and kitchens). The indoor units in these rooms are in cooling mode all year round and do not require mode switching, but they still need to be connected to mode converter equipment, resulting in waste of resources and increased costs. Summary of the Invention

[0004] The present invention aims to provide an air conditioning system to improve the cost waste caused by equipping indoor air conditioning units with both cooling and heating modes in places where no heating mode is required.

[0005] According to one aspect of the present invention, an air conditioning system is provided, the air conditioning system comprising:

[0006] The outdoor unit includes a compressor, an outdoor heat exchanger connected to the compressor, a first refrigerant port connected to the outdoor heat exchanger, a second refrigerant port connected to the compressor's discharge port, and a third refrigerant port connected to the compressor's suction port.

[0007] The first pipe connects to the first refrigerant port of the outdoor unit;

[0008] The second pipe connects to the second refrigerant inlet of the outdoor unit;

[0009] The third pipe connects to the third refrigerant inlet of the outdoor unit; and

[0010] A single-mode indoor unit is configured to operate in cooling mode only. The single-mode indoor unit includes an inlet connected to a first pipe and an outlet connected to a third pipe.

[0011] In some embodiments, the air conditioning system further includes a dual-mode indoor unit, which has a cooling mode and a heating mode.

[0012] When the dual-mode indoor unit is in cooling mode, one end of the dual-mode indoor unit is connected to the first pipe to introduce the refrigerant condensed by the outdoor heat exchanger, and the other end of the dual-mode indoor unit is connected to the third pipe to deliver the refrigerant evaporated in the dual-mode indoor unit to the compressor's suction port.

[0013] When the dual-mode indoor unit is in heating mode, one end of the dual-mode indoor unit is connected to the second pipe to introduce the refrigerant compressed by the compressor, and the other end of the dual-mode indoor unit is connected to the first pipe to deliver the refrigerant condensed in the dual-mode indoor unit to the first pipe.

[0014] In some embodiments, the air conditioning system further includes a mode converter for controlling the switching of the dual-mode indoor unit between a cooling operating mode and a heating operating mode, the mode converter being connected to the first pipe, the second pipe, the third pipe, and the dual-mode indoor unit respectively.

[0015] In some embodiments, the single-mode indoor unit includes an indoor unit throttling component connected to a first pipeline and an indoor unit heat exchanger connected to the indoor unit throttling component.

[0016] In some embodiments, the outdoor unit further includes:

[0017] The first solenoid valve is connected to the first refrigerant inlet and the outdoor heat exchanger;

[0018] The second solenoid valve connects the second refrigerant port and the compressor's exhaust port;

[0019] The third solenoid valve connects the third refrigerant inlet to the compressor's suction port.

[0020] In some embodiments, the air conditioning system further includes a controller, which is signal-connected to the first solenoid valve, the second solenoid valve and the third solenoid valve respectively, and is configured to open the first solenoid valve, the second solenoid valve and the third solenoid valve when the dual-mode indoor unit is in heating mode.

[0021] In some embodiments, the air conditioning system includes multiple dual-mode indoor units connected in parallel.

[0022] In some embodiments, when the dual-mode indoor unit is in heating mode, the single-mode indoor unit is configured to introduce refrigerant condensed in the dual-mode indoor unit from the first pipe.

[0023] In some embodiments, no mode switching device is provided between the single-mode indoor unit and the first pipeline.

[0024] By applying the technical solution of this application, a single-mode indoor unit can be installed in places where heating is not required, which improves the problem of cost waste caused by equipping indoor units with both cooling and heating modes in places where air conditioning heating mode is not required in the prior art.

[0025] Other features and advantages of the invention will become clear from the following detailed description of exemplary embodiments of the invention with reference to the accompanying drawings. Attached Figure Description

[0026] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0027] Figure 1 A schematic diagram of the structure of an air conditioning system according to an embodiment of the present invention is shown;

[0028] Figure 2 A schematic diagram of the overall cooling mode of an air conditioning system according to an embodiment of the present invention is shown; and

[0029] Figure 3 A schematic diagram of the overall heating mode of an air conditioning system according to an embodiment of the present invention is shown.

[0030] In the picture:

[0031] 1. Outdoor unit; 2. First pipe; 3. Second pipe; 4. Third pipe; 5. Single-mode indoor unit; 6. Dual-mode indoor unit; 7. Mode converter; 11. Compressor; 12. Outdoor heat exchanger; 13. First refrigerant inlet; 14. Second refrigerant inlet; 15. Third refrigerant inlet; 16. Gas-liquid separator; 17. First solenoid valve; 18. Second solenoid valve; 19. Third solenoid valve; 110. First four-way valve; 111. Second four-way valve. Detailed Implementation

[0032] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. The following description of at least one exemplary embodiment is merely illustrative and is in no way intended to limit the present invention or its application or use. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0033] Combination Figures 1 to 3 As shown, in this embodiment, the air conditioning system includes an outdoor unit 1, a first pipe 2, a second pipe 3, a third pipe 4, and a single-mode indoor unit 5.

[0034] Outdoor unit 1 includes a compressor 11, an outdoor heat exchanger 12 connected to the compressor 11, a first refrigerant port 13 connected to the outdoor heat exchanger 12, a second refrigerant port 14 connected to the exhaust port of the compressor 11, and a third refrigerant port 15 connected to the suction port of the compressor 11.

[0035] The first pipe 2 is connected to the first refrigerant port 13 of the outdoor unit 1; the second pipe 3 is connected to the second refrigerant port 14 of the outdoor unit 1; and the third pipe 4 is connected to the third refrigerant port 15 of the outdoor unit 1.

[0036] The single-mode indoor unit 5 is configured to operate in a cooling mode only. The single-mode indoor unit 5 includes an inlet connected to the first pipe 2 and an outlet connected to the third pipe 4.

[0037] In this embodiment, the single-mode indoor unit 5 can be installed in places where heating is not required, which improves the problem of cost waste caused by configuring both cooling and heating modes in indoor units in places where air conditioning heating mode is not required in the prior art.

[0038] The air conditioning system also includes a dual-mode indoor unit 6, which has both a cooling mode and a heating mode.

[0039] When the dual-mode indoor unit 6 is in cooling mode, one end of the dual-mode indoor unit 6 is connected to the first pipe 2 to introduce the refrigerant condensed by the outdoor heat exchanger 12, and the other end of the dual-mode indoor unit 6 is connected to the third pipe 4 to deliver the refrigerant evaporated in the dual-mode indoor unit 6 to the suction port of the compressor 11.

[0040] When the dual-mode indoor unit 6 is in heating mode, one end of the dual-mode indoor unit 6 is connected to the second pipe 3 to introduce the refrigerant compressed by the compressor 11, and the other end of the dual-mode indoor unit 6 is connected to the first pipe 2 to deliver the refrigerant condensed in the dual-mode indoor unit 6 to the first pipe 2.

[0041] In this embodiment, the dual-mode indoor unit 6 can act as a condenser in the heating mode. The refrigerant condensed in the dual-mode indoor unit 6 can be transported to the single-mode indoor unit 5 through the first pipeline 2 so that the single-mode indoor unit 5 can continue to operate in the cooling mode as an evaporator.

[0042] The air conditioning system also includes a mode converter 7 for controlling the dual-mode indoor unit 6 to switch between cooling and heating modes. The mode converter 7 is connected to the first pipe 2, the second pipe 3, the third pipe 4, and the dual-mode indoor unit 6, respectively.

[0043] The single-mode indoor unit 5 includes an indoor unit throttling component connected to the first pipe 2 and an indoor unit heat exchanger connected to the indoor unit throttling component. The refrigerant introduced through the first pipe 2 and condensed by the outdoor heat exchanger 12 or the dual-mode indoor unit 6 in heating mode is throttled by the indoor unit throttling component and then enters the indoor heat exchanger to evaporate.

[0044] The outdoor unit 1 also includes a first solenoid valve 17, a second solenoid valve 18, and a third solenoid valve 19. The first solenoid valve 17 is connected to the first refrigerant port 13 and the outdoor heat exchanger 12; the second solenoid valve 18 is connected to the second refrigerant port 14 and the exhaust port of the compressor 11; and the third solenoid valve 19 is connected to the third refrigerant port 15 and the suction port of the compressor 11.

[0045] The air conditioning system also includes a controller, which is signal-connected to the first solenoid valve 17, the second solenoid valve 18 and the third solenoid valve 19 respectively, and is configured to open the first solenoid valve 17, the second solenoid valve 18 and the third solenoid valve 19 when the dual-mode indoor unit 6 is in heating mode.

[0046] In some embodiments, the air conditioning system includes a plurality of dual-mode indoor units 6 connected in parallel.

[0047] In some embodiments, when the dual-mode indoor unit 6 is in heating mode, the single-mode indoor unit 5 is configured to introduce refrigerant condensed in the dual-mode indoor unit 6 from the first pipe 2.

[0048] In some embodiments, no mode switching device is provided between the single-mode indoor unit 5 and the first pipeline 2.

[0049] like Figure 2 As shown, when both the dual-mode indoor unit 6 and the single-mode indoor unit 5 are in cooling mode, the refrigerant compressed by the compressor 11 is delivered to the outdoor heat exchanger 12 through the first four-way valve 110. After the compressed refrigerant condenses in the outdoor heat exchanger 12, it flows to the first pipeline 2 through the first solenoid valve 17 and the first refrigerant port 13. The inlet of one or more single-mode indoor units 5 introduces the condensed refrigerant from the first pipeline 2. The refrigerant entering the single-mode indoor unit 5 is throttled by the indoor unit throttling component and then enters the indoor unit heat exchanger to evaporate. The evaporated refrigerant flows to the gas-liquid separator 16 through the third pipeline 4 and the third solenoid valve 19. The gaseous refrigerant output by the gas-liquid separator 16 returns to the suction port of the compressor 11.

[0050] One or more dual-mode indoor units 6 are introduced via mode converter 7. The refrigerant condensed in the outdoor heat exchanger 12 is introduced from the first pipe 2. After being throttled and evaporated in the dual-mode indoor unit 6, the refrigerant flows to the gas-liquid separator 16 via the third pipe 4 and the third solenoid valve 19. The gaseous refrigerant output from the gas-liquid separator 16 returns to the suction port of the compressor 11.

[0051] like Figure 3As shown, the dual-mode indoor unit 6 is in heating mode, while the single-mode indoor unit 5 can still be in cooling mode. The refrigerant compressed by the compressor 11 is delivered to the dual-mode indoor unit 6 via the second four-way valve 111, the second solenoid valve 18, the second refrigerant port 14, and the second pipeline 3. After condensing in the dual-mode indoor unit 6, the refrigerant is delivered to the first pipeline 2 via the mode converter 7. A portion of the condensed refrigerant is delivered to the outdoor heat exchanger 12 via the first pipeline 2 and the first solenoid valve 17. After evaporating in the outdoor heat exchanger 12, the refrigerant returns to the suction port of the compressor 11 via the gas-liquid separator 16.

[0052] The remaining refrigerant after condensation in the dual-mode indoor unit 6 can be transported to the single-mode indoor unit 5 via the first pipeline 2. The refrigerant entering the single-mode indoor unit 5 is throttled by the indoor unit's throttling component and then enters the indoor unit's heat exchanger to evaporate. The evaporated refrigerant flows to the gas-liquid separator 16 via the third pipeline 4 and the third solenoid valve 19. The gaseous refrigerant output from the gas-liquid separator 16 returns to the suction port of the compressor 11.

[0053] In this embodiment, the single-mode indoor unit 5 can operate in cooling mode when the dual-mode indoor unit 6 is in both cooling and heating modes.

[0054] The above description is merely an exemplary embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. An air conditioning system, characterized by, The application relates to an air conditioner, which comprises: an outdoor unit (1) comprising a compressor (11), an outdoor heat exchanger (12) connected to the compressor (11), a first refrigerant port (13) connected to the outdoor heat exchanger (12), a second refrigerant port (14) connected to the exhaust port of the compressor (11), and a third refrigerant port (15) connected to the suction port of the compressor (11); a first pipeline (2) connected to the first refrigerant port (13) of the outdoor unit (1); a second pipeline (3) connected to the second refrigerant port (14) of the outdoor unit (1); a third pipeline (4) connected to the third refrigerant port (15) of the outdoor unit (1); and a single-mode indoor unit (5) configured to have only a cooling operation mode, the single-mode indoor unit (5) comprising an inlet connected to the first pipeline (2) and an outlet connected to the third pipeline (4), a double-mode indoor unit (6) having a cooling operation mode and a heating operation mode, when the double-mode indoor unit (6) is in the heating operation mode, one end of the double-mode indoor unit (6) is connected to the second pipeline (3) to introduce the refrigerant compressed by the compressor (11), and the other end of the double-mode indoor unit (6) is connected to the first pipeline (2) to transport the refrigerant condensed in the double-mode indoor unit (6) to the first pipeline (2), when the double-mode indoor unit (6) is in the cooling operation mode, one end of the double-mode indoor unit (6) is connected to the first pipeline (2) to introduce the refrigerant condensed by the outdoor heat exchanger (12), and the other end of the double-mode indoor unit (6) is connected to the third pipeline (4) to transport the refrigerant evaporated in the double-mode indoor unit (6) to the suction port of the compressor (11). The air conditioner further comprises a mode converter (7) for controlling the double-mode indoor unit (6) to switch between the cooling operation mode and the heating operation mode, the mode converter (7) being connected to the first pipeline (2), the second pipeline (3), the third pipeline (4) and the double-mode indoor unit (6) respectively.

2. The air conditioning system of claim 1, wherein The single-mode indoor unit (5) comprises an indoor unit throttling component connected to the first pipeline (2) and an indoor unit heat exchanger connected to the indoor unit throttling component.

3. The air conditioning system of claim 1, wherein, The outdoor unit (1) further comprises:

4. The air conditioning system of claim 1, wherein, a first electromagnetic valve (17) connecting the first refrigerant port (13) and the outdoor heat exchanger (12); a second electromagnetic valve (18) connecting the second refrigerant port (14) and the exhaust port of the compressor (11); a third electromagnetic valve (19) connecting the third refrigerant port (15) and the suction port of the compressor (11). The air conditioner further comprises a controller connected to the first electromagnetic valve (17), the second electromagnetic valve (18) and the third electromagnetic valve (19) respectively, and configured to open the first electromagnetic valve (17), the second electromagnetic valve (18) and the third electromagnetic valve (19) when the double-mode indoor unit (6) is in the heating operation mode.

5. The air conditioning system of claim 4, wherein, The air conditioner comprises a plurality of parallel double-mode indoor units (6).

6. The air conditioning system of claim 1, wherein, ​ 7. The air conditioning system of claim 1, wherein, When the dual-mode indoor unit (6) is in a heating operation mode, the single-mode indoor unit (5) is configured to introduce refrigerant condensed in the dual-mode indoor unit (6) from the first pipeline (2).

8. The air conditioning system of claim 1, wherein, No mode conversion device is arranged between the single-mode indoor unit (5) and the first pipeline (2).

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