Air conditioning system and air conditioner

Abstract

The utility model discloses an air conditioning system and an air conditioner, the air conditioning system comprises: a first compressor having a first air suction port and a first exhaust port; the second compressor is provided with a second air suction port and a second exhaust port; the first four-way valve is provided with a first opening, a second opening, a third opening and a fourth opening, and the second four-way valve is provided with a fifth opening, a sixth opening, a seventh opening and an eighth opening. According to the air conditioning system, the refrigerant condensation temperature of the initial end of one of the first indoor heat exchanger and the second indoor heat exchanger is smaller than the refrigerant minimum condensation temperature of the tail end of the other one of the first indoor heat exchanger and the second indoor heat exchanger. Therefore, the non-azeotropic characteristic of the refrigerant is enhanced, after heat exchange between the refrigerant and air is completed, the condensation temperature of the refrigerant is closer to the initial temperature of the air before heat exchange, heat exchange is more sufficient, and the energy utilization rate is increased.

Description

Technical Field

[0001] The utility model relates to the technical field of air processing equipment, in particular to an air conditioning system and an air conditioner. Background Art

[0002] At present, the pure working fluid air conditioning system with single suction and single exhaust is the mainstream, but the temperature difference between the outlet temperature of the refrigerant side and the inlet temperature of the air side is large, the circulation loss is inevitable, and the energy waste caused cannot be ignored. Utility Model Content

[0003] The utility model aims to solve at least one of the technical problems existing in the prior art. To this end, the utility model provides an air conditioning system, which has more sufficient heat exchange, thereby reducing heat exchange losses and improving energy utilization.

[0004] The utility model also provides an air conditioner, comprising the above-mentioned air conditioning system.

[0005] According to an embodiment of the utility model, the air conditioning system includes: a first compressor, the first compressor has a first air intake port and a first air exhaust port; a second compressor, the second compressor has a second air intake port and a second air exhaust port; a first four-way valve, the first four-way valve has a first port, a second port, a third port and a fourth port, the first port is connected to the first exhaust port, the second port is connected to the first air intake port, the first port is connected to one of the third port and the fourth port, and the second port is connected to the other of the third port and the fourth port; a second four-way valve, the second four-way valve has a fifth port, a sixth port, a seventh port and an eighth port. port, the fifth port is connected to the first exhaust port, the sixth port is connected to the first intake port, the fifth port is connected to one of the seventh port and the eighth port, and the sixth port is connected to the other of the seventh port and the eighth port; a first indoor heat exchanger, a second indoor heat exchanger and an outdoor heat exchanger, one end of the first indoor heat exchanger is connected to the third port, one end of the second indoor heat exchanger is connected to the seventh port, the other end of the first indoor heat exchanger and the other end of the second indoor heat exchanger are both connected to one end of the outdoor heat exchanger, and the other end of the outdoor heat exchanger is connected to the fourth port and the eighth port.

[0006] According to the air conditioning system of the embodiment of the utility model, by setting the first compressor, the second compressor, the first indoor heat exchanger and the second indoor heat exchanger, in the heating mode, the first compressor and the second compressor respectively control the refrigerant pressure flowing to the first indoor heat exchanger and the refrigerant pressure flowing to the second indoor heat exchanger, so that the refrigerant condensation temperature at the initial end of one of the first indoor heat exchanger and the second indoor heat exchanger is lower than the minimum refrigerant condensation temperature at the terminal end of the other. Thereby enhancing the non-azeotropic characteristics of the refrigerant, so that after the heat exchange between the refrigerant and the air is completed, the condensation temperature of the refrigerant is closer to the initial temperature of the air before the heat exchange, so that the heat exchange is more sufficient, thereby reducing the heat exchange loss and improving the energy utilization rate.

[0007] In some embodiments of the present invention, the air-conditioning system also includes: an intermediate heat exchanger, the intermediate heat exchanger having a first heat exchange path and a second heat exchange path for mutual heat exchange, the first heat exchange path being connected in series between the outdoor heat exchanger and the first indoor heat exchanger and between the outdoor heat exchanger and the second indoor heat exchanger, and the second heat exchange path being connected in series between the second indoor heat exchanger and the seventh port.

[0008] In some embodiments of the present invention, the heat exchanger is a plate heat exchanger.

[0009] In some embodiments of the utility model, the air-conditioning system also includes: a first flow path and a second flow path, the second indoor heat exchanger and the seventh port are connected through the first flow path and the second flow path, the first flow path and the second flow path are connected in parallel, and the second heat exchange flow path is connected in series to the second flow path; a first stop valve and a second stop valve, the first stop valve is arranged on the first flow path for controlling the on and off of the first flow path, and the second stop valve is arranged on the second flow path for controlling the on and off of the second flow path.

[0010] In some embodiments of the present invention, a first throttling device is provided on the flow path where the first indoor heat exchanger is located, and the first throttling device is located between the first indoor heat exchanger and the outdoor heat exchanger. A second throttling device is provided on the flow path where the second indoor heat exchanger is located, and the second throttling device is located between the second indoor heat exchanger and the outdoor heat exchanger.

[0011] In some embodiments of the present invention, an indoor fan is provided on one side of the first indoor heat exchanger and the second indoor heat exchanger; and / or an outdoor fan is provided on one side of the outdoor heat exchanger.

[0012] The air conditioner according to an embodiment of the utility model includes: an indoor unit shell, the indoor unit shell having a first air outlet and a second air outlet; an indoor fan, the indoor fan is arranged in the indoor unit shell, and is used to drive the air flow from one of the first air outlet and the second air outlet to the other; in the above-mentioned air conditioning system, the first indoor heat exchanger and the second indoor heat exchanger are arranged in the indoor unit shell, and are used to exchange heat with the gas entering the indoor unit shell.

[0013] According to the air conditioner of the embodiment of the utility model, by setting the above-mentioned air conditioning system, setting the first compressor, the second compressor, the first indoor heat exchanger and the second indoor heat exchanger, in the heating mode, the first compressor and the second compressor respectively control the refrigerant pressure flowing to the first indoor heat exchanger and the refrigerant pressure flowing to the second indoor heat exchanger, so that the refrigerant condensation temperature at the initial end of the first indoor heat exchanger and the second indoor heat exchanger is lower than the minimum condensation temperature of the refrigerant at the terminal end of the other. Thereby enhancing the non-azeotropic characteristics of the refrigerant, so that after the heat exchange between the refrigerant and the air is completed, the condensation temperature of the refrigerant is closer to the initial temperature of the air before the heat exchange, so that the heat exchange is more sufficient, thereby reducing the heat exchange loss and improving the energy utilization rate.

[0014] In some embodiments of the present invention, in cooling mode, the refrigerant flow direction of at least one of the first indoor heat exchanger and the second indoor heat exchanger is opposite to the air flow direction; and / or, in heating mode, the refrigerant flow direction of at least one of the first indoor heat exchanger and the second indoor heat exchanger is opposite to the air flow direction.

[0015] In some embodiments of the utility model, the indoor fan can be forward and reversed. In cooling mode and heating mode, the refrigerant flow direction of the first indoor heat exchanger and the second indoor heat exchanger is opposite to the air flow direction. In cooling mode, the inlet of the first indoor heat exchanger and the inlet of the second indoor heat exchanger are located at the same end, the outlet of the first indoor heat exchanger and the outlet of the second indoor heat exchanger are located at the same end, and the inlet and outlet of the first indoor heat exchanger are located at opposite ends. The arrangement direction of the inlet and outlet of the first indoor heat exchanger is the same as the arrangement direction of the first air outlet and the second air outlet.

[0016] In some embodiments of the present invention, the first indoor heat exchanger and the second indoor heat exchanger are stacked; and / or the first air outlet and the second air outlet are located on the same side of the indoor unit casing.

[0017] Additional aspects and advantages of the present invention will be given in part in the following description, and in part will become apparent from the following description, or will be learned through the practice of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] The above and / or additional aspects and advantages of the present invention will become apparent and easily understood from the description of the embodiments in conjunction with the following drawings, in which:

[0019] Figure 1 is a schematic diagram of an air conditioning system according to an embodiment of the utility model, wherein a cooling mode is shown;

[0020] Figure 2 is a schematic diagram of an air conditioning system according to an embodiment of the utility model, wherein a heating mode is shown;

[0021] Figure 3 It is a schematic diagram of the structure inside the indoor unit housing of the air conditioner according to an embodiment of the utility model, wherein it shows the cooling mode;

[0022] Figure 4 is a schematic diagram of the structure inside the indoor unit housing of the air conditioner according to an embodiment of the utility model, wherein the heating mode is shown;

[0023] Figure 5 It is a schematic diagram of the temperature and heat changes of the refrigerant and air of the air conditioning system according to an embodiment of the utility model, wherein it represents the cooling mode;

[0024] Figure 6 It is a schematic diagram of the temperature and heat changes of the refrigerant and air of the air-conditioning system according to an embodiment of the utility model, wherein the heating mode is shown.

[0025] Reference numerals:

[0026] 10. Air conditioning system;

[0027] 1. First compressor; 11. First air intake port; 12. First air exhaust port;

[0028] 2. Second compressor; 21. Second air intake port; 22. Second air discharge port;

[0029] 3. First four-way valve; 31. First port; 32. Second port; 33. Third port; 34. Fourth port;

[0030] 4, second four-way valve; 41, fifth port; 42, sixth port; 43, seventh port; 44, eighth port;

[0031] 51. First indoor heat exchanger; 52. Second indoor heat exchanger; 53. Outdoor heat exchanger;

[0032] 6. Intermediate heat exchanger; 61. First heat exchange flow path; 62. Second heat exchange flow path;

[0033] 71. First flow path; 72. Second flow path;

[0034] 81. First stop valve; 82. Second stop valve;

[0035] 91. First throttling device; 92. Second throttling device;

[0036] 20. Indoor unit housing; 201. First air outlet; 202. Second air outlet;

[0037] 30. Indoor fan;

[0038] 40. Outdoor fan. DETAILED DESCRIPTION

[0039] The embodiments of the present invention are described in detail below, and examples of the embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present invention, and cannot be understood as limiting the present invention.

[0040] In the description of the present utility model, it is necessary to understand that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like indicate positions or positional relationships based on the positions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present utility model and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present utility model. In addition, features defined as "first" and "second" may explicitly or implicitly include one or more of such features. In the description of the present utility model, unless otherwise specified, "multiple" means two or more.

[0041] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installation", "connection" and "connection" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0042] The air conditioning system 10 according to an embodiment of the present invention will be described below with reference to the accompanying drawings.

[0043] like Figure 1 and Figure 2As shown, the air conditioning system 10 according to the embodiment of the utility model includes: a first compressor 1, a second compressor 2, a first four-way valve 3, a second four-way valve 4, a first indoor heat exchanger 51, a second indoor heat exchanger 52 and an outdoor heat exchanger 53.

[0044] Specifically, refer to Figure 1 and Figure 2 , the first compressor 1 has a first suction port 11 and a first exhaust port 12; the second compressor 2 has a second suction port 21 and a second exhaust port 22; the first four-way valve 3 has a first port 31, a second port 32, a third port 33 and a fourth port 34, the first port 31 is connected to the first exhaust port 12, the second port 32 is connected to the first suction port 11, the first port 31 is connected to one of the third port 33 and the fourth port 34, and the second port 32 is connected to the other of the third port 33 and the fourth port 34; the second four-way valve 4 has a fifth port 41, a sixth port 42, a seventh port 43 and an eighth port 44 4, the fifth port 41 is communicated with the first exhaust port 12, the sixth port 42 is communicated with the first intake port 11, the fifth port 41 is communicated with one of the seventh port 43 and the eighth port 44, and the sixth port 42 is communicated with the other of the seventh port 43 and the eighth port 44; one end of the first indoor heat exchanger 51 is communicated with the third port 33, one end of the second indoor heat exchanger 52 is communicated with the seventh port 43, the other end of the first indoor heat exchanger 51 and the other end of the second indoor heat exchanger 52 are both communicated with one end of the outdoor heat exchanger 53, and the other end of the outdoor heat exchanger 53 is communicated with the fourth port 34 and the eighth port 44.

[0045] It is understandable that if Figure 1 As shown, in the cooling mode, the first port 31 is connected to the fourth port 34, the second port 32 is connected to the third port 33, the fifth port 41 is connected to the eighth port 44, and the sixth port 42 is connected to the seventh port 43. At this time, the flow route of the refrigerant in the air conditioning system 10 is:

[0046] The refrigerant flows from the first exhaust port 12 of the first compressor 1 to the first port 31, and then flows from the fourth port 34 to the outdoor heat exchanger 53, at which time the outdoor heat exchanger 53 is a condenser, and then flows to the first indoor heat exchanger 51, at which time the first indoor heat exchanger 51 is an evaporator, and then flows to the first air intake port 11 through the third port 33 and the second port 32 in sequence, and then flows back to the first compressor 1, forming a first refrigeration cycle. At the same time, the refrigerant flows from the second exhaust port 22 of the second compressor 2 to the fifth port 41, and then flows from the eighth port 44 to the outdoor heat exchanger 53, at which time the outdoor heat exchanger 53 is a condenser, and then flows to the second indoor heat exchanger 52, at which time the second indoor heat exchanger 52 is an evaporator, and then flows to the second air intake port 21 through the seventh port 43 and the sixth port 42 in sequence, and then flows back to the second compressor 2, forming a second refrigeration cycle. Thus, by running the first refrigeration cycle and the second refrigeration cycle simultaneously, the heat exchange efficiency is improved and the refrigeration effect is improved.

[0047] Furthermore, if Figure 2 As shown, in the heating mode, the first port 31 is connected to the third port 33, the second port 32 is connected to the fourth port 34, the fifth port 41 is connected to the seventh port 43, and the sixth port 42 is connected to the eighth port 44. At this time, the flow route of the refrigerant in the air conditioning system 10 is:

[0048] The refrigerant flows from the first exhaust port 12 of the first compressor 1 to the first port 31, and then flows from the third port 33 to the first indoor heat exchanger 51, at which time the first indoor heat exchanger 51 is a condenser, and then flows to the outdoor heat exchanger 53, at which time the outdoor heat exchanger 53 is an evaporator, and then flows to the first air intake port 11 through the fourth port 34 and the second port 32 in sequence, and then flows back to the first compressor 1, forming a first heating cycle. At the same time, the refrigerant flows from the second exhaust port 22 of the second compressor 2 to the first port 31, and then flows from the third port 33 to the second indoor heat exchanger 52, at which time the second indoor heat exchanger 52 is a condenser, and then flows to the outdoor heat exchanger 53, at which time the outdoor heat exchanger 53 is an evaporator, and then flows to the second air intake port 21 through the fourth port 34 and the second port 32 in sequence, and then flows back to the second compressor 2, forming a second heating cycle. Thus, by running the first heating cycle and the second heating cycle simultaneously, the heat exchange efficiency is improved and the heating effect is improved.

[0049] It should be noted that, since the refrigerant in the air conditioning system 10 is a non-azeotropic refrigerant, in the cooling mode, as the refrigerant in the first indoor heat exchanger 51 and the second indoor heat exchanger 52 continuously exchanges heat with the air, the evaporation temperature of the refrigerant continuously increases, and this process is called the evaporation temperature slip of the refrigerant. When the heat exchange between the refrigerant and the air is completed, if the evaporation temperature of the refrigerant is closer to the initial temperature of the air before the heat exchange, the heat exchange is more sufficient, the heat exchange loss is lower, and the energy utilization rate is higher.

[0050] Similarly, in the heating mode, as the refrigerant in the first indoor heat exchanger 51 and the second indoor heat exchanger 52 continuously exchanges heat with the air, the condensation temperature of the refrigerant continuously decreases, and this process is called the condensation temperature slip of the refrigerant. When the heat exchange between the refrigerant and the air is completed, if the condensation temperature of the refrigerant is closer to the initial temperature of the air before the heat exchange, the heat exchange is more complete, the heat exchange loss is lower, and the energy utilization rate is higher.

[0051] For example, Figure 5In the example shown, T is temperature, Q is heat, a is air, b is the refrigerant in the first indoor heat exchanger 51, c is the refrigerant in the second indoor heat exchanger 52, the direction indicated by the arrow is the direction of temperature and heat change in the cooling mode, the refrigerant evaporation temperature at the initial end of the first indoor heat exchanger 51 is b1, the refrigerant evaporation temperature at the terminal of the first indoor heat exchanger 51 is b2, the refrigerant evaporation temperature at the initial end of the second indoor heat exchanger 52 is c1, and the refrigerant evaporation temperature at the terminal of the second indoor heat exchanger 52 is c2. As the heat exchange proceeds, in the cooling mode, the evaporation temperature b1 to the evaporation temperature b2 gradually increases, and the evaporation temperature c1 to the evaporation temperature c2 also gradually increases. This process is called the evaporation temperature slip of the refrigerant.

[0052] For example, Figure 6 In the example shown, T is temperature, Q is heat, a is air, b is the refrigerant in the first indoor heat exchanger 51, c is the refrigerant in the second indoor heat exchanger 52, the direction indicated by the arrow is the direction of temperature and heat change in the heating mode, the refrigerant condensation temperature at the initial end of the first indoor heat exchanger 51 is b1, the refrigerant condensation temperature at the terminal of the first indoor heat exchanger 51 is b2, the refrigerant condensation temperature at the initial end of the second indoor heat exchanger 52 is c1, and the refrigerant condensation temperature at the terminal of the second indoor heat exchanger 52 is c2. As the heat exchange proceeds, in the heating mode, the condensation temperature b1 to the condensation temperature b2 gradually decreases, and the condensation temperature c1 to the condensation temperature c2 also gradually decreases. This process is called the condensation temperature slip of the refrigerant.

[0053] In general, the greater the refrigerant's evaporation temperature slip and / or the refrigerant's condensation temperature slip (the greater the difference in the refrigerant's evaporation temperature or the refrigerant's condensation temperature before and after heat exchange), that is, the stronger the non-azeotropic characteristics of the refrigerant, the closer the refrigerant's condensation temperature and / or evaporation temperature is to the initial temperature of the air before heat exchange, the more complete the heat exchange, the lower the heat exchange loss, and the higher the energy utilization rate.

[0054] In the utility model, in the heating mode, the first compressor 1 can control the refrigerant pressure flowing to the first indoor heat exchanger 51, thereby controlling the condensation temperature of the refrigerant flowing to the first indoor heat exchanger 51, and the second compressor 2 can control the refrigerant pressure flowing to the second indoor heat exchanger 52, thereby controlling the condensation temperature of the refrigerant flowing to the second indoor heat exchanger 52.

[0055] The refrigerant pressure flowing to the first indoor heat exchanger 51 and the refrigerant pressure flowing to the second indoor heat exchanger 52 are controlled by the first compressor 1 and the second compressor 2, respectively, so that the refrigerant condensation temperature at the initial end of one of the first indoor heat exchanger 51 and the second indoor heat exchanger 52 is lower than the refrigerant condensation temperature at the terminal end of the other. Compared with the first indoor heat exchanger and the second indoor heat exchanger, in which the refrigerant condensation temperature at the initial end of one is equal to the refrigerant condensation temperature at the terminal end of the other, the difference in the refrigerant condensation temperature before and after the heat exchange is greater, thereby enhancing the non-azeotropic characteristics of the refrigerant, so that after the heat exchange between the refrigerant and the air is completed, the condensation temperature of the refrigerant is closer to the initial temperature of the air before the heat exchange, so that the heat exchange is more sufficient, thereby reducing the heat exchange loss and improving the energy utilization rate.

[0056] For example, in the example shown in Figure 6, in the heating mode, the refrigerant condensation temperature b1 at the initial end of the first indoor heat exchanger 51 is lower than the refrigerant condensation temperature c2 at the terminal end of the second indoor heat exchanger 52. This enhances the non-azeotropic properties of the refrigerant, so that after the refrigerant and the air complete the heat exchange, the condensation temperature of the refrigerant is closer to the initial temperature a1 of the air before the heat exchange, so that the heat exchange is more sufficient, thereby reducing the heat exchange loss and improving the energy utilization rate.

[0057] According to the air conditioning system 10 of the embodiment of the utility model, by setting the first compressor 1, the second compressor 2, the first indoor heat exchanger 51 and the second indoor heat exchanger 52, in the heating mode, the first compressor 1 and the second compressor 2 respectively control the refrigerant pressure flowing to the first indoor heat exchanger 51 and the refrigerant pressure flowing to the second indoor heat exchanger 52, so that the refrigerant condensation temperature at the initial end of the first indoor heat exchanger 51 and the second indoor heat exchanger 52 is lower than the minimum refrigerant condensation temperature at the terminal end of the other. Thereby, the non-azeotropic characteristics of the refrigerant are enhanced, so that after the heat exchange between the refrigerant and the air is completed, the condensation temperature of the refrigerant is closer to the initial temperature of the air before the heat exchange, so that the heat exchange is more sufficient, thereby reducing the heat exchange loss and improving the energy utilization rate.

[0058] In some embodiments of the present invention, Figure 1 and Figure 2 As shown, the air-conditioning system 10 also includes: an intermediate heat exchanger 6, the intermediate heat exchanger 6 has a first heat exchange flow path 61 and a second heat exchange flow path 62 for mutual heat exchange, the first heat exchange flow path 61 is connected in series between the outdoor heat exchanger 53 and the first indoor heat exchanger 51 and between the outdoor heat exchanger 53 and the second indoor heat exchanger 52, and the second heat exchange flow path 62 is connected in series between the second indoor heat exchanger 52 and the seventh port 43.

[0059] It can be understood that in the cooling mode, the refrigerant flows out from the first compressor 1 and the second compressor 2 respectively and then converges, then flows to the outdoor heat exchanger 53, then flows from the outdoor heat exchanger 53 to the first heat exchange path 61 in the intermediate heat exchanger 6, and then splits and flows to the first indoor heat exchanger 51 and the second indoor heat exchanger 52 respectively. The refrigerant flowing out of the first indoor heat exchanger 51 directly returns to the first compressor 1, and the refrigerant flowing out of the second indoor heat exchanger 52 passes through the second heat exchange path 62 in the intermediate heat exchanger 6, thereby realizing heat exchange between the first heat exchange path 61 and the second heat exchange path 62.

[0060] Therefore, by setting the intermediate heat exchanger 6, the throttling loss in the cooling mode can be reduced and the evaporation temperature can be increased, thereby further improving the heat exchange efficiency and also improving the energy utilization rate, so that the air-conditioning system 10 has a better heat exchange effect and is more energy-efficient.

[0061] In some embodiments of the present invention, the intermediate heat exchanger 6 is a plate heat exchanger. It is understandable that the plate heat exchanger has a high heat transfer coefficient, improves the heat exchange efficiency, and is beneficial to the energy saving of the air conditioning system 10. At the same time, the plate heat exchanger is mainly made of metal plates, and the price of raw materials is lower than that of metal pipes, thereby improving the economy of the heat exchanger.

[0062] In some embodiments of the present invention, Figure 1 and Figure 2 As shown, the air conditioning system 10 further includes: a first flow path 71, a second flow path 72, a first stop valve 81 and a second stop valve 82. The second indoor heat exchanger 52 and the seventh port 43 are connected via the first flow path 71 and the second flow path 72, the first flow path 71 and the second flow path 72 are connected in parallel, and the second heat exchange flow path 62 is connected in series to the second flow path 72; the first stop valve 81 is provided on the first flow path 71 to control the on-off of the first flow path 71, and the second stop valve 82 is provided on the second flow path 72 to control the on-off of the second flow path 72.

[0063] It should be noted that, in the cooling mode, the first stop valve 81 is closed and the second stop valve 82 is opened, at which time the first flow path 71 is disconnected and the second flow path 72 is connected. The refrigerant flows out of the first compressor 1 and the second compressor 2 respectively and then converges, then flows to the outdoor heat exchanger 53, then flows from the outdoor heat exchanger 53 to the first heat exchange flow path 61 in the intermediate heat exchanger 6, then splits, and flows to the first indoor heat exchanger 51 and the second indoor heat exchanger 52 respectively. The refrigerant flowing out of the first indoor heat exchanger 51 directly returns to the first compressor 1, and the refrigerant flowing out of the second indoor heat exchanger 52 flows to the second flow path 72, then passes through the second heat exchange flow path 62 in the intermediate heat exchanger 6, thereby realizing heat exchange between the first heat exchange flow path 61 and the second heat exchange flow path 62, and finally flows to the seventh port 43 and returns to the second compressor 2.

[0064] In the heating mode, the second stop valve 82 is closed and the first stop valve 81 is opened. At this time, the first flow path 71 is connected and the second flow path 72 is disconnected. After the refrigerant flows out of the first compressor 1, it flows to the first indoor heat exchanger 51. After the refrigerant flows out of the second compressor 2, it flows to the second indoor heat exchanger 52 through the first flow path 71. The refrigerant flowing out of the first indoor heat exchanger 51 and the refrigerant flowing out of the second indoor heat exchanger 52 are combined and flow to the outdoor heat exchanger 53 through the first heat exchange flow path 61 in the intermediate heat exchanger 6 for heat exchange. After the refrigerant flowing out of the outdoor heat exchanger 53 is split again, one part returns to the first compressor 1 and the other part returns to the second compressor 2.

[0065] It is understandable that in the cooling mode, heat exchange needs to be performed between the first heat exchange flow path 61 and the second heat exchange flow path 62, so as to reduce the throttling loss in the cooling mode and increase the evaporation temperature. However, in the heating mode, it is not necessary to perform heat exchange between the first heat exchange flow path 61 and the second heat exchange flow path 62. The second stop valve 82 is closed and the first stop valve 81 is opened, so that the first flow path 71 is connected and the second flow path 72 is disconnected, so that the second heat exchange flow path 62 is disconnected, so that the first heat exchange flow path 61 and the second heat exchange flow path 62 stop exchanging heat, so that the intermediate heat exchanger 6 stops working, which can achieve the effect of energy saving.

[0066] In some embodiments of the present invention, Figure 1 and Figure 2 As shown, a first throttling device 91 is provided on the flow path where the first indoor heat exchanger 51 is located, and the first throttling device 91 is located between the first indoor heat exchanger 51 and the outdoor heat exchanger 53, and a second throttling device 92 is provided on the flow path where the second indoor heat exchanger 52 is located, and the second throttling device 92 is located between the second indoor heat exchanger 52 and the outdoor heat exchanger 53, wherein the first throttling device 91 and the second throttling device 92 are connected in parallel.

[0067] It should be noted that, in the cooling mode, the flow route of the refrigerant in the air-conditioning system 10 is: the refrigerant flows from the first exhaust port 12 of the first compressor 1 to the first port 31, and then flows from the fourth port 34 to the outdoor heat exchanger 53, at which time the outdoor heat exchanger 53 is a condenser, and then flows to the first throttling device 91, and the refrigerant is throttled and depressurized by the first throttling device 91, and then flows to the first indoor heat exchanger 51, at which time the first indoor heat exchanger 51 is an evaporator, and then flows to the first air intake port 11 through the third port 33 and the second port 32 in sequence, and then flows back to the first compressor 1 to form a first refrigeration cycle. At the same time, the refrigerant flows from the second exhaust port 22 of the second compressor 2 to the fifth port 41, and then flows from the eighth port 44 to the outdoor heat exchanger 53. At this time, the outdoor heat exchanger 53 is a condenser. Then it flows to the second throttling device 92, and the refrigerant is throttled and depressurized by the second throttling device 92. Then it flows to the second indoor heat exchanger 52. At this time, the second indoor heat exchanger 52 is an evaporator, and then flows to the second air intake port 21 through the seventh port 43 and the sixth port 42 in sequence, and then flows back to the second compressor 2 to form a second refrigeration cycle.

[0068] It can be understood that in the cooling mode, by controlling the opening of the first throttling device 91, the refrigerant pressure flowing to the first indoor heat exchanger 51 can be controlled, thereby controlling the evaporation temperature of the refrigerant flowing to the first indoor heat exchanger 51; and by controlling the opening of the second throttling device 92, the refrigerant pressure flowing to the second indoor heat exchanger 52 can be controlled, thereby controlling the evaporation temperature of the refrigerant flowing to the second indoor heat exchanger 52. Thus, the refrigerant pressure flowing to the first indoor heat exchanger 51 and the refrigerant pressure flowing to the second indoor heat exchanger 52 are respectively controlled by the first throttling device 91 and the second throttling device 92, so that the refrigerant evaporation temperature of the initial end of one of the first indoor heat exchanger 51 and the second indoor heat exchanger 52 is higher than the refrigerant evaporation temperature of the other end. Thereby, the non-azeotropic characteristics of the refrigerant are enhanced, so that after the heat exchange between the refrigerant and the air is completed, the condensation temperature of the refrigerant is closer to the initial temperature of the air before the heat exchange, so that the heat exchange is more sufficient, thereby reducing the heat exchange loss and improving the energy utilization rate.

[0069] For example, in the example shown in 5, T is temperature, Q is heat, a is air, b is the refrigerant in the first indoor heat exchanger 51, and c is the refrigerant in the second indoor heat exchanger 52. The direction indicated by the arrow is the direction of temperature and heat change in the heating mode. In the heating mode, the refrigerant evaporation temperature c1 at the initial end of the second indoor heat exchanger 52 is less than the refrigerant evaporation temperature b2 at the end of the second indoor heat exchanger 52. This enhances the non-azeotropic properties of the refrigerant, so that after the heat exchange between the refrigerant and the air is completed, the evaporation temperature of the refrigerant is closer to the initial temperature a1 of the air before the heat exchange, so that the heat exchange is more sufficient, thereby reducing heat exchange losses and improving energy utilization.

[0070] In some embodiments of the present invention, Figure 1 and Figure 2 As shown, an indoor fan 30 is provided on one side of the first indoor heat exchanger 51 and the second indoor heat exchanger 52; thus, by providing the indoor fan 30, the air flow rate is increased, thereby improving the heat exchange efficiency between the refrigerant and the air in the first indoor heat exchanger 51 and the second indoor heat exchanger 52.

[0071] In some embodiments of the present invention, Figure 1 and Figure 2 As shown, an outdoor fan 40 is provided on one side of the outdoor heat exchanger 53. Thus, by providing the outdoor fan 40, the flow speed of the air is increased, thereby improving the heat exchange efficiency between the refrigerant and the air in the outdoor heat exchanger 53.

[0072] The air conditioner according to the embodiment of the present utility model is described below with reference to the accompanying drawings.

[0073] like Figure 1-Figure 4 As shown, the air conditioner according to the embodiment of the utility model includes: an indoor unit casing 20, an indoor fan 30, and the above-mentioned air conditioning system 10.

[0074] Specifically, refer to Figure 3 and Figure 4 The indoor unit casing 20 has a first air outlet 201 and a second air outlet 202; the indoor fan 30 is arranged in the indoor unit casing 20, and is used to drive the air flow from one of the first air outlet 201 and the second air outlet 202 to the other; the first indoor heat exchanger 51 and the second indoor heat exchanger 52 are arranged in the indoor unit casing 20, and are used to exchange heat with the gas entering the indoor unit casing 20.

[0075] It can be understood that the indoor fan 30 drives the air flow from one of the first air outlet 201 and the second air outlet 202 to the other, thereby achieving air outlet in different directions, thereby adapting to the air outlet method in the heating mode and the cooling mode, improving the heating and cooling effects, and at the same time, the flow of air also improves the heat exchange efficiency between the refrigerant and the air in the outdoor heat exchanger 53.

[0076] For example, Figure 3 In the example shown, the first air outlet 201 is located above the second air outlet 202. In the cooling mode, the indoor fan 30 drives the air flow from the second air outlet 202 to the first air outlet 201, thereby realizing upward air discharge in the cooling mode. Since cold air tends to sink, the upward discharge of cold air can improve the uniformity of indoor air flow, thereby improving the cooling effect.

[0077] For example, Figure 4In the example shown, the first air outlet 201 is located above the second air outlet 202. In the heating mode, the indoor fan 30 drives the air flow from the first air outlet 201 to the second air outlet 202, thereby realizing downward air discharge in the heating mode. Since hot air tends to float upward, the downward discharge of hot air can improve the uniformity of indoor air flow, thereby improving the heating effect.

[0078] According to the air conditioner of the embodiment of the utility model, by setting the above-mentioned air conditioning system 10, the first compressor 1, the second compressor 2, the first indoor heat exchanger 51 and the second indoor heat exchanger 52 are set. In the heating mode, the first compressor 1 and the second compressor 2 respectively control the refrigerant pressure flowing to the first indoor heat exchanger 51 and the refrigerant pressure flowing to the second indoor heat exchanger 52, so that the refrigerant condensation temperature at the initial end of the first indoor heat exchanger 51 and the second indoor heat exchanger 52 is lower than the minimum condensation temperature of the refrigerant at the terminal end of the other. Thereby, the non-azeotropic characteristics of the refrigerant are enhanced, so that after the heat exchange between the refrigerant and the air is completed, the condensation temperature of the refrigerant is closer to the initial temperature of the air before the heat exchange, so that the heat exchange is more sufficient, thereby reducing the heat exchange loss and improving the energy utilization rate.

[0079] In some embodiments of the utility model, in the cooling mode, the refrigerant flow direction of at least one of the first indoor heat exchanger 51 and the second indoor heat exchanger 52 is opposite to the air flow direction; thereby, the refrigerant and the air flow produce a countercurrent, thereby improving the heat exchange effect between the refrigerant and the air and improving the heat exchange efficiency.

[0080] In the present invention, in the cooling mode, the refrigerant flow direction in the first indoor heat exchanger 51 and the second indoor heat exchanger 52 is opposite to the airflow direction. However, the present invention is not limited thereto. In the cooling mode, the refrigerant flow direction in the first indoor heat exchanger 51 may be opposite to the airflow direction, and the refrigerant flow direction in the second indoor heat exchanger 52 may be the same as the airflow direction; or the refrigerant flow direction in the second indoor heat exchanger 52 may be opposite to the airflow direction, and the refrigerant flow direction in the first indoor heat exchanger 51 may be the same as the airflow direction.

[0081] In some embodiments of the present invention, in the heating mode, the refrigerant flow direction of at least one of the first indoor heat exchanger 51 and the second indoor heat exchanger 52 is opposite to the air flow direction. Thus, the refrigerant and the air flow generate countercurrents, thereby improving the heat exchange effect between the refrigerant and the air and improving the heat exchange efficiency.

[0082] In the present invention, in the heating mode, the refrigerant flow direction in the first indoor heat exchanger 51 and the second indoor heat exchanger 52 is opposite to the airflow direction. However, the present invention is not limited thereto. In the heating mode, the refrigerant flow direction in the first indoor heat exchanger 51 may be opposite to the airflow direction, and the refrigerant flow direction in the second indoor heat exchanger 52 may be the same as the airflow direction; or the refrigerant flow direction in the second indoor heat exchanger 52 may be opposite to the airflow direction, and the refrigerant flow direction in the first indoor heat exchanger 51 may be the same as the airflow direction.

[0083] In some embodiments of the present invention, Figure 3 and Figure 4 As shown, the indoor fan 30 can be forward and reverse, and in the cooling mode and the heating mode, the refrigerant flow direction of the first indoor heat exchanger 51 and the second indoor heat exchanger 52 is opposite to the airflow direction. It should be noted that the refrigerant flow direction of the first indoor heat exchanger 51 and the second indoor heat exchanger 52 is opposite in the cooling mode and the heating mode. In order to make the refrigerant flow direction of the first indoor heat exchanger 51 and the second indoor heat exchanger 52 opposite to the airflow direction in the cooling mode and the heating mode, the airflow direction is changed by forward and reverse operation of the indoor fan 30 in the cooling mode and the heating mode, so as to adapt to the change of the refrigerant flow direction of the first indoor heat exchanger 51 and the second indoor heat exchanger 52 in the cooling mode and the heating mode, so that the refrigerant flow direction of the first indoor heat exchanger 51 and the second indoor heat exchanger 52 can be opposite to the airflow direction regardless of the cooling mode or the heating mode.

[0084] Furthermore, if Figure 3 and Figure 4 As shown, in the cooling mode, the inlet of the first indoor heat exchanger 51 and the inlet of the second indoor heat exchanger 52 are located at the same end, the outlet of the first indoor heat exchanger 51 and the outlet of the second indoor heat exchanger 52 are located at the same end, and the inlet and outlet of the first indoor heat exchanger 51 are located at opposite ends, and the arrangement direction of the inlet and outlet of the first indoor heat exchanger 51 is the same as the arrangement direction of the first air outlet 201 and the second air outlet 202.

[0085] It can be understood that, by setting the inlet and outlet of the first indoor heat exchanger 51 and the inlet and outlet of the second indoor heat exchanger 52, the refrigerant flow directions in the first indoor heat exchanger 51 and the second indoor heat exchanger 52 are the same. The arrangement direction of the inlet and outlet of the first indoor heat exchanger 51 is the same as the arrangement direction of the first air outlet 201 and the second air outlet 202, so that in the cooling mode and the heating mode, the refrigerant flow direction of the first indoor heat exchanger 51 and the second indoor heat exchanger 52 is opposite to the air flow direction, thereby improving the heat exchange effect between the refrigerant and the air and improving the heat exchange efficiency.

[0086] For example, Figure 3In the example shown, in the cooling mode, the first air outlet 201 is located above the second air outlet 202, and the indoor fan 30 drives the airflow from the second air outlet 202 to the first air outlet 201, and the inlet of the first indoor heat exchanger 51 is located at the upper end of the outlet of the first indoor heat exchanger 51, and the inlet of the second indoor heat exchanger 52 is also located at the upper end of the outlet of the second indoor heat exchanger 52, so that when the direction of the airflow is from bottom to top, the flow direction of the refrigerant in the first indoor heat exchanger 51 and the second indoor heat exchanger 52 is from top to bottom, so that in the cooling mode, the flow direction of the refrigerant in the first indoor heat exchanger 51 and the second indoor heat exchanger 52 is opposite to the flow direction of the airflow.

[0087] For example, Figure 4 In the example shown, in the heating mode, the first air outlet 201 is located above the second air outlet 202, and the indoor fan 30 drives the airflow from the first air outlet 201 to the second air outlet 202. The inlet of the first indoor heat exchanger 51 is located at the lower end of the outlet of the first indoor heat exchanger 51, and the inlet of the second indoor heat exchanger 52 is also located at the lower end of the outlet of the second indoor heat exchanger 52. Therefore, when the direction of the airflow is from top to bottom, the flow direction of the refrigerant in the first indoor heat exchanger 51 and the second indoor heat exchanger 52 is from bottom to top, so that in the heating mode, the flow direction of the refrigerant in the first indoor heat exchanger 51 and the second indoor heat exchanger 52 is opposite to the flow direction of the airflow.

[0088] In some embodiments of the present invention, Figure 3 and Figure 4 As shown, the first indoor heat exchanger 51 and the second indoor heat exchanger 52 are stacked, thereby facilitating the air to exchange heat with the refrigerant in the first indoor heat exchanger 51 and the second indoor heat exchanger 52 in sequence, and the step-by-step heat exchange improves the heat exchange efficiency.

[0089] Among them, in the cooling mode, the air first exchanges heat with the refrigerant in the first indoor heat exchanger 51, and then exchanges heat with the refrigerant in the second indoor heat exchanger 52. Since the evaporation temperature of the refrigerant at the initial end of the second indoor heat exchanger 52 is lower than the evaporation temperature of the refrigerant at the terminal end of the second indoor heat exchanger 52, the air first exchanges heat with the refrigerant in the first indoor heat exchanger 51, and then exchanges heat with the refrigerant in the second indoor heat exchanger 52, which is conducive to the temperature of the air being adapted to the evaporation temperature of the refrigerant. Similarly, in the heating mode, the air first exchanges heat with the refrigerant in the second indoor heat exchanger 52, and then exchanges heat with the refrigerant in the first indoor heat exchanger 51, which is conducive to the temperature of the air being adapted to the condensation temperature of the refrigerant, thereby further improving the heat exchange efficiency, and also improving the energy utilization rate, so that the air conditioning system 10 has a better heat exchange effect and is more energy-saving.

[0090] For example, Figure 3In the example shown, in the cooling mode, the first air outlet 201 is located above the second air outlet 202, the indoor fan 30 drives the airflow from the second air outlet 202 to the first air outlet 201, and the first indoor heat exchanger 51 is located below the second indoor heat exchanger 52, so that in the cooling mode, the airflow can first exchange heat with the refrigerant in the first indoor heat exchanger 51.

[0091] For example, Figure 4 In the example shown, in the heating mode, the first air outlet 201 is located above the second air outlet 202, the indoor fan 30 drives the airflow from the first air outlet 201 to the second air outlet 202, and the first indoor heat exchanger 51 is located below the second indoor heat exchanger 52, so that in the heating mode, the airflow can first exchange heat with the refrigerant in the second indoor heat exchanger 52.

[0092] In some embodiments of the present invention, the first air outlet 201 and the second air outlet 202 are located on the same side of the indoor unit housing 20. This facilitates the air outlet of the air conditioner and also facilitates the manufacturing process.

[0093] An air conditioner according to a specific embodiment of the present invention is described below. It is worth noting that the following description is merely exemplary and is intended to be used to explain the present invention, but should not be construed as a limitation on the present invention.

[0094] like Figure 1-Figure 4 As shown, the air conditioner according to the embodiment of the utility model includes: an indoor unit housing 20, an indoor fan 30 and an air conditioning system 10.

[0095] like Figure 1 and Figure 2 As shown, the air-conditioning system 10 according to an embodiment of the utility model includes: a first compressor 1, a second compressor 2, a first four-way valve 3, a second four-way valve 4, a first indoor heat exchanger 51, a second indoor heat exchanger 52, an outdoor heat exchanger 53, an intermediate heat exchanger 6, a first flow path 71, a second flow path 72, a first stop valve 81 and a second stop valve 82.

[0096] Furthermore, if Figure 1 and Figure 2As shown, the first compressor 1 has a first suction port 11 and a first exhaust port 12; the second compressor 2 has a second suction port 21 and a second exhaust port 22; the first four-way valve 3 has a first port 31, a second port 32, a third port 33 and a fourth port 34, the first port 31 is connected to the first exhaust port 12, the second port 32 is connected to the first suction port 11, the first port 31 is connected to one of the third port 33 and the fourth port 34, and the second port 32 is connected to the other of the third port 33 and the fourth port 34; the second four-way valve 4 has a fifth port 41, a sixth port 42, a seventh port 43 and an eighth port 44, the fifth port 41 is connected to the first exhaust port 12, the sixth port 42 is connected to the first air intake port 11, the fifth port 41 is connected to one of the seventh port 43 and the eighth port 44, and the sixth port 42 is connected to the other of the seventh port 43 and the eighth port 44; one end of the first indoor heat exchanger 51 is connected to the third port 33, one end of the second indoor heat exchanger 52 is connected to the seventh port 43, the other end of the first indoor heat exchanger 51 and the other end of the second indoor heat exchanger 52 are both connected to one end of the outdoor heat exchanger 53, and the other end of the outdoor heat exchanger 53 is connected to the fourth port 34 and the eighth port 44. A first throttling device 91 is provided on the flow path where the first indoor heat exchanger 51 is located, and the first throttling device 91 is located between the first indoor heat exchanger 51 and the outdoor heat exchanger 53, and a second throttling device 92 is provided on the flow path where the second indoor heat exchanger 52 is located, and the second throttling device 92 is located between the second indoor heat exchanger 52 and the outdoor heat exchanger 53, wherein the first throttling device 91 and the second throttling device 92 are connected in parallel. An indoor fan 30 is provided on one side of the first indoor heat exchanger 51 and the second indoor heat exchanger 52 ; an outdoor fan 40 is provided on one side of the outdoor heat exchanger 53 .

[0097] Furthermore, if Figure 1 and Figure 2 As shown, the intermediate heat exchanger 6 is a plate heat exchanger, and the intermediate heat exchanger 6 has a first heat exchange path 61 and a second heat exchange path 62 for mutual heat exchange, the first heat exchange path 61 is connected in series between the outdoor heat exchanger 53 and the first indoor heat exchanger 51 and between the outdoor heat exchanger 53 and the second indoor heat exchanger 52, and the second heat exchange path 62 is connected in series between the second indoor heat exchanger 52 and the seventh port 43.

[0098] Furthermore, if Figure 1 and Figure 2 As shown, the second indoor heat exchanger 52 and the seventh port 43 are connected via the first flow path 71 and the second flow path 72, the first flow path 71 and the second flow path 72 are connected in parallel, and the second heat exchange flow path 62 is connected in series to the second flow path 72; the first stop valve 81 is provided on the first flow path 71 for controlling the on-off of the first flow path 71, and the second stop valve 82 is provided on the second flow path 72 for controlling the on-off of the second flow path 72.

[0099] Thus, in the cooling mode, the first port 31 is connected to the fourth port 34, the second port 32 is connected to the third port 33, the fifth port 41 is connected to the eighth port 44, the sixth port 42 is connected to the seventh port 43, the first stop valve 81 is closed, and the second stop valve 82 is opened. At this time, the first flow path 71 is disconnected and the second flow path 72 is connected. At this time, the flow route of the refrigerant in the air conditioning system 10 is: the refrigerant flows from the first exhaust port 12 of the first compressor 1 to the first port 31, and then flows from the fourth port 34 to the outdoor heat exchanger 53, at this time the outdoor heat exchanger 53 is a condenser, and then flows to the first heat exchange flow path 61 in the intermediate heat exchanger 6, and then flows to the first throttling device 91, and the refrigerant is throttled and depressurized by the first throttling device 91, and then flows to the first indoor heat exchanger 51, at this time the first indoor heat exchanger 51 is an evaporator, and then flows to the first air intake port 11 through the third port 33 and the second port 32 in sequence, and then flows back to the first compressor 1, forming a first refrigeration cycle. At the same time, the refrigerant flows from the second exhaust port 22 of the second compressor 2 to the fifth port 41, and then flows from the eighth port 44 to the outdoor heat exchanger 53. At this time, the outdoor heat exchanger 53 is a condenser, and then flows to the first heat exchange path 61 in the intermediate heat exchanger 6, and then flows to the second throttling device 92. The refrigerant is throttled and depressurized by the second throttling device 92, and then flows to the second indoor heat exchanger 52. At this time, the second indoor heat exchanger 52 is an evaporator, and then flows through the second flow path 72 through the second heat exchange path 62 in the intermediate heat exchanger 6, and then flows through the seventh port 43 and the sixth port 42 in turn to the second intake port 21, and then flows back to the second compressor 2 to form a second refrigeration cycle.

[0100] In the heating mode, the first port 31 is connected to the third port 33, the second port 32 is connected to the fourth port 34, the fifth port 41 is connected to the seventh port 43, the sixth port 42 is connected to the eighth port 44, the second stop valve 82 is closed, and the first stop valve 81 is opened. At this time, the first flow path 71 is connected, and the second flow path 72 is disconnected. At this time, the flow route of the refrigerant in the air conditioning system 10 is: the refrigerant flows from the first exhaust port 12 of the first compressor 1 to the first port 31, and then flows from the third port 33 to the first indoor heat exchanger 51, at this time the first indoor heat exchanger 51 is a condenser, passes through the first heat exchange flow path 61 in the intermediate heat exchanger 6, and then flows to the outdoor heat exchanger 53, at this time the outdoor heat exchanger 53 is an evaporator, and then passes through the fourth port 34 and the second port 32 in sequence to the first air intake port 11, and then flows back to the first compressor 1, forming a first heating cycle. At the same time, the refrigerant flows from the second exhaust port 22 of the second compressor 2 to the first port 31, and then flows from the third port 33 to the second indoor heat exchanger 52, at which time the second indoor heat exchanger 52 is a condenser, and then flows to the outdoor heat exchanger 53, at which time the outdoor heat exchanger 53 is an evaporator, and then flows through the first flow path 71 through the fourth port 34 and the second port 32 in sequence to the second air intake port 21, and then flows back to the second compressor 2 to form a second heating cycle.

[0101] Furthermore, if Figure 3 and Figure 4 As shown, the indoor unit housing 20 has a first air outlet 201 and a second air outlet 202; the indoor fan 30 is arranged in the indoor unit housing 20, and is used to drive the airflow from one of the first air outlet 201 and the second air outlet 202 to the other; the first indoor heat exchanger 51 and the second indoor heat exchanger 52 are arranged in the indoor unit housing 20, and are used to exchange heat with the gas entering the indoor unit housing 20. In the cooling mode, the refrigerant flow direction in the first indoor heat exchanger 51 and the second indoor heat exchanger 52 is opposite to the airflow direction. In the heating mode, the refrigerant flow direction in the first indoor heat exchanger 51 and the second indoor heat exchanger 52 is opposite to the airflow direction.

[0102] Furthermore, if Figure 3 and Figure 4 As shown, the indoor fan 30 can be forward and reverse, and in the cooling mode and the heating mode, the refrigerant flow direction of the first indoor heat exchanger 51 and the second indoor heat exchanger 52 is opposite to the air flow direction. In the cooling mode, the inlet of the first indoor heat exchanger 51 and the inlet of the second indoor heat exchanger 52 are located at the same end, the outlet of the first indoor heat exchanger 51 and the outlet of the second indoor heat exchanger 52 are located at the same end, and the inlet and outlet of the first indoor heat exchanger 51 are located at opposite ends, and the arrangement direction of the inlet and outlet of the first indoor heat exchanger 51 is the same as the arrangement direction of the first air outlet 201 and the second air outlet 202.

[0103] Furthermore, if Figure 3 and Figure 4 As shown, the first indoor heat exchanger 51 and the second indoor heat exchanger 52 are stacked, and the first air outlet 201 and the second air outlet 202 are located on the same side of the indoor unit casing 20.

[0104] The non-azeotropic refrigerant in the air-conditioning system 10 according to the embodiment of the present invention is well known to those skilled in the art and will not be described in detail here.

[0105] In the description of this specification, the description with reference to the terms "one embodiment", "some embodiments", "illustrative embodiments", "examples", "specific examples", or "some examples" means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the utility model. In this specification, the schematic representation of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in any one or more embodiments or examples in a suitable manner.

[0106] Although the embodiments of the present invention have been shown and described, those skilled in the art will appreciate that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the claims and their equivalents.

Claims

1. An air conditioning system, characterized in that: include: a first compressor having a first suction port and a first discharge port; a second compressor having a second suction port and a second discharge port; a first four-way valve, the first four-way valve having a first port, a second port, a third port and a fourth port, the first port being communicated with the first exhaust port, the second port being communicated with the first intake port, the first port being communicated with one of the third port and the fourth port, and the second port being communicated with the other of the third port and the fourth port; a second four-way valve, the second four-way valve having a fifth port, a sixth port, a seventh port and an eighth port, the fifth port being communicated with the first exhaust port, the sixth port being communicated with the first intake port, the fifth port being communicated with one of the seventh port and the eighth port, and the sixth port being communicated with the other of the seventh port and the eighth port; A first indoor heat exchanger, a second indoor heat exchanger and an outdoor heat exchanger, one end of the first indoor heat exchanger is connected to the third port, one end of the second indoor heat exchanger is connected to the seventh port, the other end of the first indoor heat exchanger and the other end of the second indoor heat exchanger are both connected to one end of the outdoor heat exchanger, and the other end of the outdoor heat exchanger is connected to the fourth port and the eighth port.

2. The air conditioning system according to claim 1, characterized in that: Also includes: An intermediate heat exchanger, wherein the intermediate heat exchanger has a first heat exchange path and a second heat exchange path for mutual heat exchange, wherein the first heat exchange path is connected in series between the outdoor heat exchanger and the first indoor heat exchanger and between the outdoor heat exchanger and the second indoor heat exchanger, and the second heat exchange path is connected in series between the second indoor heat exchanger and the seventh port.

3. The air conditioning system according to claim 2, characterized in that: The intermediate heat exchanger is a plate heat exchanger.

4. The air conditioning system according to claim 2, characterized in that: Also includes: a first flow path and a second flow path, the second indoor heat exchanger and the seventh port are connected via the first flow path and the second flow path, the first flow path and the second flow path are connected in parallel, and the second heat exchange flow path is connected in series to the second flow path; A first stop valve and a second stop valve, wherein the first stop valve is disposed on the first flow path and is used to control the on-off of the first flow path, and the second stop valve is disposed on the second flow path and is used to control the on-off of the second flow path.

5. The air conditioning system according to claim 1, characterized in that: A first throttling device is provided on the flow path where the first indoor heat exchanger is located, and the first throttling device is located between the first indoor heat exchanger and the outdoor heat exchanger. A second throttling device is provided on the flow path where the second indoor heat exchanger is located, and the second throttling device is located between the second indoor heat exchanger and the outdoor heat exchanger.

6. The air conditioning system according to claim 1, characterized in that: An indoor fan is provided on one side of the first indoor heat exchanger and the second indoor heat exchanger; And / or, an outdoor fan is provided on one side of the outdoor heat exchanger.

7. An air conditioner, characterized in that: include: An indoor unit housing, wherein the indoor unit housing has a first air outlet and a second air outlet; An indoor fan, the indoor fan being disposed in the indoor unit housing and configured to drive airflow from one of the first air outlet and the second air outlet to the other; According to the air conditioning system according to any one of claims 1 to 6, the first indoor heat exchanger and the second indoor heat exchanger are arranged in the indoor unit casing and are used to exchange heat with the gas entering the indoor unit casing.

8. The air conditioner according to claim 7, characterized in that: In cooling mode, a refrigerant flow direction of at least one of the first indoor heat exchanger and the second indoor heat exchanger is opposite to an air flow direction; And / or, in the heating mode, a refrigerant flow direction of at least one of the first indoor heat exchanger and the second indoor heat exchanger is opposite to an air flow direction.

9. The air conditioner according to claim 8, characterized in that: The indoor fan can be forward and reverse. In cooling mode and heating mode, the refrigerant flow direction of the first indoor heat exchanger and the second indoor heat exchanger is opposite to the air flow direction. In the cooling mode, the inlet of the first indoor heat exchanger and the inlet of the second indoor heat exchanger are located at the same end, the outlet of the first indoor heat exchanger and the outlet of the second indoor heat exchanger are located at the same end, and the inlet and outlet of the first indoor heat exchanger are located at opposite ends, and the arrangement direction of the inlet and outlet of the first indoor heat exchanger is the same as the arrangement direction of the first air outlet and the second air outlet.

10. The air conditioner according to claim 7, characterized in that: The first indoor heat exchanger and the second indoor heat exchanger are stacked; And / or, the first air outlet and the second air outlet are located on the same side of the indoor unit casing.

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