An air conditioning system

Abstract

The present application relates to an air conditioning system comprising a receiver drier, an inlet of the receiver drier being configured to receive a refrigerant condensed but not throttled, the air conditioning system further comprising an intermediate heat exchanger; the intermediate heat exchanger comprising a first heat exchange portion and a second heat exchange portion; the first heat exchange portion being in communication with an outlet of the receiver drier to receive the refrigerant flowing out of the receiver drier; the second heat exchange portion being configured to receive the refrigerant throttled and evaporated.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of thermal management, in particular to an air conditioning system. BACKGROUND

[0002] Air conditioning systems are widely used in building environments and vehicle environments to provide comfortable thermal and humid environments for people inside buildings and vehicles. An air conditioning system includes a thermodynamic cycle composed of a compressor, a condensing device, a throttling element and an evaporating device. A refrigerant flows in the thermodynamic cycle. By changing the flow direction of the refrigerant, the air conditioning system can be switched between a first working mode and a second working mode, wherein the first working mode can be a working mode for heating the building environment and the vehicle environment, and the second working mode can be a working mode for cooling the building environment and the vehicle environment. The air conditioning system with the working mode for heating is also called a heat pump air conditioning system.

[0003] In the prior art, the structure of the air conditioning system with multiple working modes is relatively complex, and the performance is not high. SUMMARY

[0004] The purpose of the present application is to provide an air conditioning system with the advantage of high performance.

[0005] To achieve the purpose of the air conditioning system, it includes a liquid accumulator dryer, an inlet of the liquid accumulator dryer is used to receive a refrigerant which is condensed but not throttled, and the air conditioning system further includes an intermediate heat exchanger; the intermediate heat exchanger includes a first heat exchange part and a second heat exchange part; the first heat exchange part is in communication with an outlet of the liquid accumulator dryer to receive the refrigerant flowing out of the liquid accumulator dryer; and the second heat exchange part is used to receive the refrigerant which is throttled and evaporated.

[0006] In one embodiment, the air conditioning system further includes a reversible heat exchanger; the reversible heat exchanger has a first port and a second port; one of the first port and the second port allows the refrigerant to enter the reversible heat exchanger, and the other allows the refrigerant to flow out of the reversible heat exchanger.

[0007] The reversible heat exchanger is used to condense or evaporate the refrigerant.

[0008] In one embodiment, the air conditioning system further includes a first one-way conducting element, a first pipeline, a second pipeline and a first junction; the first port, the first pipeline and the second pipeline are all in communication with the first junction; the first throttling element is arranged on the second pipeline; and the first one-way conducting element is arranged on the first pipeline, wherein an inlet of the first one-way conducting element is in communication with the first junction to prevent the refrigerant from flowing into the first junction via the first pipeline.

[0009] In one embodiment, the air conditioning system further comprises a first throttling element; the first throttling element is disposed on the second pipeline; an outlet of the first throttling element communicates with the first junction point.

[0010] In one embodiment, the air conditioning system further comprises a second one-way conducting element; the second one-way conducting element is disposed on the second pipeline, wherein an inlet of the second one-way conducting element communicates with an outlet of the first throttling element; an outlet of the second one-way conducting element communicates with the first junction point.

[0011] In one embodiment, the air conditioning system further comprises a first throttling element; the first throttling element is disposed on the second pipeline; an outlet of the first throttling element communicates with the first junction point.

[0012] In one embodiment, the air conditioning system further comprises a second one-way conducting element; the second one-way conducting element is disposed on the second pipeline, wherein an inlet of the second one-way conducting element communicates with an outlet of the first throttling element; an outlet of the second one-way conducting element communicates with the first junction point.

[0013] In one embodiment, the air conditioning system further comprises a second one-way conducting element; the second one-way conducting element is disposed on the second pipeline, wherein an inlet of the second one-way conducting element communicates with an outlet of the first throttling element; an outlet of the second one-way conducting element communicates with the first junction point.

[0014] In one embodiment, the air conditioning system further comprises a second one-way conducting element; the second one-way conducting element is disposed on the second pipeline, wherein an inlet of the second one-way conducting element communicates with an outlet of the first throttling element; an outlet of the second one-way conducting element communicates with the first junction point.

[0015] In one embodiment, the air conditioning system further comprises a second one-way conducting element; the second one-way conducting element is disposed on the second pipeline, wherein an inlet of the second one-way conducting element communicates with an outlet of the first throttling element; an outlet of the second one-way conducting element communicates with the first junction point.

[0016] The positive progress effect of the present application is that: since the refrigerant flowing through the first heat exchange part and the refrigerant flowing through the second heat exchange part can exchange heat, the refrigerant condensed but not throttled in the first heat exchange part can transfer heat to the refrigerant throttled and evaporated in the second heat exchange part, thereby reducing the temperature of the refrigerant flowing out of the first heat exchange part, i.e. improving the supercooling degree of the refrigerant flowing out of the first heat exchange part, so that the temperature of the refrigerant after throttling can also be correspondingly reduced, thereby improving the performance of the air conditioning system. In addition, this technical solution also improves the superheating degree of the refrigerant flowing out of the second heat exchange part. BRIEF DESCRIPTION OF DRAWINGS

[0017] The above and other features, properties, and advantages of the present application will become more apparent by referring to the following description in conjunction with the accompanying drawings and embodiments, in which:

[0018] Figure 1 a schematic diagram of an air conditioning system;

[0019] Figure 2 a schematic diagram of a first working mode of an air conditioning system;

[0020] Figure 3 a schematic diagram of a second working mode of an air conditioning system, in which the first throttling element is open and the second throttling element is closed;

[0021] Figure 4 a schematic diagram of a second working mode of an air conditioning system, in which the first throttling element is open and the second throttling element is open;

[0022] Figure 5 a schematic diagram of a second working mode of an air conditioning system, in which the first throttling element is closed and the second throttling element is open;

[0023] Figure 6 a schematic diagram of an air conditioning system in another embodiment;

[0024] Figure 7 a schematic diagram of a first working mode of an air conditioning system, in which the fourth shut-off element is closed and the fifth shut-off element is open;

[0025] Figure 8 a schematic diagram of a first working mode of an air conditioning system, in which the fourth shut-off element is open and the fifth shut-off element is open;

[0026] Figure 9 a schematic diagram of a second working mode of an air conditioning system, in which the fifth shut-off element is closed and the second throttling element is closed;

[0027] Figure 10 a schematic diagram of a second working mode of an air conditioning system, in which the fifth shut-off element is closed and the second throttling element is open;

[0028] Figure 11 Schematic diagram of the second working mode of the air conditioning system, in which the fifth cut-off element is closed and the first throttling element is closed. DETAILED DESCRIPTION

[0029] The subject technology is disclosed below with respect to a variety of different embodiments. For simplicity of disclosure, specific examples of elements and arrangements are described below to provide a thorough description of embodiments of the technology. These are, of course, merely examples and are in no way limiting of the scope of the present technology. For example, the first feature described after the second feature can include embodiments in which the first and second features are directly linked, and can also include embodiments in which additional features are present between the first and second features such that the first and second features are not directly linked. Additionally, like reference numerals and / or letters can be used throughout the specification and / or claims to refer to like elements and / or features. Like reference numerals and / or letters do not necessarily refer to the same element(s) or feature(s) in different examples of the description, and / or the claims. The use of like reference numerals and / or letters within the description should not be understood as implying any

[0030] It is to be noted that, Figures 1 to 11 are merely examples and are not drawn to scale, and should not be used to construe the scope of the present technology.

[0031] Figures 1 to 5 An air conditioning system 100 in one embodiment of the present technology is shown. The air conditioning system 100 has a first working mode Ml, such as a refrigeration mode, and a second working mode M2, such as a heat pump mode. The air conditioning system 100 includes a compressor 1 having a suction port la and a discharge port lb, a suction line X having one end in communication with the suction port la, and a discharge line P having one end in communication with the discharge port lb, and a refrigerant is drawn into the compressor 1 from the suction port la and discharged from the discharge port lb after being compressed.

[0032] To facilitate relatively simple switching between a first operating mode M1 and a second operating mode M2, the air conditioning system 100 includes a reversible heat exchanger 2 with a first port 2a and a second port 2b. One of the first port 2a and the second port 2b allows refrigerant to enter the reversible heat exchanger 2, while the other allows refrigerant to flow out of the reversible heat exchanger 2. The air conditioning system 100 also includes a first one-way flow element 71, a first pipe a, a second pipe b, and a first junction point A. The first reversible pipe 11, the first pipe a, and the second pipe b are all connected to and communicate with the first junction point A. The first one-way flow element 71 is disposed on the first pipe a, wherein the inlet 71a of the first one-way flow element 71 communicates with the first junction point A to prevent refrigerant from flowing into the first junction point A via the first pipe a. The first junction point A can be a tee joint. The first one-way flow element 71 can be a one-way valve, a check valve, or other fluid one-way flow devices with backflow prevention functions.

[0033] like Figure 2 As shown, in the first operating mode M1, refrigerant flows into the reversible heat exchanger 2 from the second port 2b via the second reversible pipe 12, and flows out of the reversible heat exchanger 2 from the first port 2a via the first reversible pipe 11. In the first operating mode M1, the function of the reversible heat exchanger 2 is to condense the compressed refrigerant and release heat. The reversible heat exchanger 2 can be a finned heat exchanger, and the heat released by the refrigerant is carried away by the air flowing through the reversible heat exchanger 2. More specifically, the condensed refrigerant flowing out from the first port 2a flows into the first junction A. Since the inlet 71a of the first one-way conductive element 71 is connected to the first junction A, the condensed refrigerant can flow into the first pipe a and flow downstream through the first one-way conductive element 71. The second pipe b is cut off, preventing the condensed refrigerant from flowing downstream through the first junction A along the second pipe b.

[0034] like Figure 3As shown, in the second working mode M2, refrigerant flows into the reversible heat exchanger 2 from the first port 2a and out of the reversible heat exchanger 2 from the second port 2b. In the second working mode M2, the reversible heat exchanger 2 functions to evaporate and absorb heat from the throttled refrigerant. The reversible heat exchanger 2 can be a finned heat exchanger, which absorbs heat from the air flowing through the reversible heat exchanger 2. More specifically, the second conduit b is open, and the throttled refrigerant flows into the reversible heat exchanger 2 through the second conduit b and the first junction A. Since the inlet 71a of the first one-way conducting element 71 is in communication with the first junction A, the process of refrigerant flowing into the first junction A via the first conduit a is prevented by the one-way conducting property of the first one-way conducting element 71, without the need of an additional control process. The one-way conducting property of the first one-way conducting element 71 means that the refrigerant can only flow into the first one-way conducting element 71 through the inlet 71a and can only flow out of the first one-way conducting element 71 through the outlet 71b, and the flow from the outlet 71b to the inlet 71a is not allowed.

[0035] Therefore, the above embodiment simply solves the technical problem of selectively connecting the first conduit a and the second conduit b with the first port 2a according to different working modes of the air conditioning system.

[0036] With reference to Figure 2 , 3 , the air conditioning system 100 further comprises a first throttling element 6; the first throttling element 6 is arranged on the second conduit b; the outlet 6b of the first throttling element 6 is in communication with the first junction A. The first throttling element 6 can be an electronic expansion valve with a cut-off function. In the first working mode Ml, the first throttling element 6 can be in a closed state, thereby cutting off the second conduit b. In the second working mode M2, the first throttling element 6 is in an open state, so that the second conduit b is open. The first throttling element 6 is used to throttle the condensed refrigerant, so that the refrigerant reaches a state suitable for being evaporated.

[0037] With reference to Figure 2 , 3, the air conditioning system 100 further comprises a second one-way conducting element 72; the second one-way conducting element 72 is arranged on the second pipeline b, wherein the inlet 72a of the second one-way conducting element 72 communicates with the outlet 6b of the first throttling element 6; the outlet 72b of the second one-way conducting element 72 communicates with the first junction point A. In the first working mode M1, the second one-way conducting element 72 cuts off the second pipeline b, which makes the first throttling element 6 not need to have a cut-off function, simplifying the structure of the first throttling element 6. The process of the refrigerant flowing out of the first junction point A via the second pipeline b can be prevented due to the one-way conducting property of the second one-way conducting element 72, without the need for an additional control process. In the second working mode M2, the one-way conducting property of the second one-way conducting element 72 makes the second pipeline b open, and the refrigerant throttled by the first throttling element 6 flows into the first junction point A. The second one-way conducting element 72 can be a one-way valve, but also a check valve and other fluid one-way conducting devices with backflow prevention function. The one-way conducting property of the second one-way conducting element 72 means that the refrigerant can only flow into the second one-way conducting element 72 through the inlet 72a, and can only flow out of the second one-way conducting element 72 through the outlet 72b, and the flow from the outlet 72b to the inlet 72a is not allowed.

[0038] With continued reference to Figure 2 , 3The air conditioning system 100 further comprises a first shut-off element 73, a second junction point B, a third junction point C, a third pipeline c, a fourth pipeline d and a fifth pipeline e; the first shut-off element 73 is arranged on the fourth pipeline d; the first pipeline a, the third pipeline c and the fourth pipeline d are all connected with and communicated with the second junction point B; the second pipeline b, the third pipeline c and the fifth pipeline e are all connected with and communicated with the third junction point C; the outlet 71b of the first one-way conducting element 71 is communicated with the second junction point B; the inlet 6a of the first throttling element 6 is communicated with the third junction point C. The first shut-off element 73 can be a shut-off valve, and the second junction point B and the third junction point C can be a three-way joint. In the first working mode M1, the first shut-off element 73 cuts off the fourth pipeline d, and the refrigerant condensed by the reversible heat exchanger 2 flows into the second junction point B through the first pipeline a, then flows into the third pipeline c through the second junction point B, and then flows to the downstream through the third junction point C. In the second working mode M2, the first shut-off element 73 is in an open state, so that the fourth pipeline d is conducted, and the condensed refrigerant flows into the second junction point B through the fourth pipeline d, then flows into the third pipeline c, then flows to the second pipeline b through the third junction point C, and is throttled by the first throttling element 6 arranged on the second pipeline b, and then flows into the first junction point A. The pressure of the throttled refrigerant is lower than that of the refrigerant before throttling, so the pressure of the refrigerant at the second junction point B is higher than that at the first junction point A, but due to the one-way conducting property of the first one-way conducting element 71, the refrigerant at the second junction point B cannot reach the first junction point A through the first one-way conducting element 71, which makes the refrigerant at the second junction point B only flow into the third pipeline c.

[0039] Reference Figure 2 , 3, 4, The air conditioning system 100 further comprises a second stop element 74, a third stop element 75, a condenser 3, a fourth junction point D, a fifth junction point E, a sixth pipeline f, a seventh pipeline g and an exhaust pipeline P; the condenser 3 is arranged on the exhaust pipeline P; the second stop element 74 is arranged on the sixth pipeline f; the third stop element 75 is arranged on the seventh pipeline g; the fourth pipeline d, the sixth pipeline f and the exhaust pipeline P are connected and communicated with the fourth junction point D; the second port 2b, the seventh pipeline g and the sixth pipeline f are connected and communicated with the fifth junction point E. The second stop element 74 and the third stop element 75 can be stop valves, the fourth junction point D and the fifth junction point E can be three-way joints, and the condenser 3 can be a fin heat exchanger for heat exchange with air. In the first working mode M1, the second stop element 74 is opened, so that the sixth pipeline f is opened; the third stop element 75 is closed, so that the seventh pipeline g is cut off. The refrigerant to be condensed flows into the reversible heat exchanger 2 through the sixth pipeline f, the fifth junction point E, the second reversible pipeline 12 and the second port 2b, and in this working mode, the refrigerant is first condensed by the condenser 3 on the exhaust pipeline P, and then continues to be condensed by the reversible heat exchanger 2. In the second working mode M2, the second stop element 74 cuts off the sixth pipeline f, and the third stop element 75 is opened, so that the seventh pipeline g is conducted. The refrigerant evaporated by the reversible heat exchanger 2 flows into the seventh pipeline g through the fifth junction point E, and flows downstream through the seventh pipeline g.

[0040] As shown in Figure 2 、 3 , 4, 5, The air conditioning system 100 further comprises an evaporator 4, a second throttling element 5, a sixth junction point F, an eighth pipeline h and a suction pipeline X; the seventh pipeline g, the eighth pipeline h and the suction pipeline X are connected and communicated with the sixth junction point F; the second throttling element 5 and the evaporator 4 are connected in series with the fifth pipeline e and the eighth pipeline h, that is, the refrigerant in the fifth pipeline e can flow through the second throttling element 5 and the evaporator 4, and then flow into the eighth pipeline h; the second throttling element 5 and the evaporator 4 are arranged in series with each other and communicate the fifth pipeline e and the eighth pipeline h. The evaporator 4 can be a fin heat exchanger for heat exchange with air, or a plate heat exchanger for heat exchange with liquid coolant. The second throttling element 5 can be an electronic expansion valve with a stop function, and the sixth junction point F can be a three-way joint. The second throttling element 5 throttles the refrigerant, and the evaporator 4 evaporates and absorbs heat from the refrigerant throttled by the second throttling element 5.

[0041] In the first working mode M1, the second throttling element 5 is opened, and the refrigerant flowing out of the third junction point C enters the fifth pipeline e, flows through the second throttling element 5 and the evaporator 4, then flows into the eighth pipeline h, and then flows into the suction pipeline X through the sixth junction point F; wherein the refrigerant is throttled in the second throttling element 5 and evaporated in the evaporator 4.

[0042] In such Figure 3 In the second operating mode M2 ​​shown, the first throttling element 6 is open, and the second throttling element 5 is closed. The second throttling element 5 disconnects the connection between the fifth pipe e and the eighth pipe h, so that the refrigerant flowing out from the third junction C can only flow into the second pipe b, and after being throttled by the first throttling element 6, it flows into the reversible heat exchanger 2. The reversible heat exchanger 2 is used to evaporate the refrigerant throttled by the first throttling element 6.

[0043] In such Figure 4 In the second operating mode M2 ​​shown, the first throttling element 6 and the second throttling element 5 are open. The second throttling element 5 connects the fifth pipe e and the eighth pipe h, so that a portion of the refrigerant flowing out from the third junction C enters the fifth pipe e, and the other portion enters the second pipe b. The refrigerant diverted from the third junction C, after being throttled and evaporated respectively, converges at the sixth junction F and flows into the suction pipe X.

[0044] In such Figure 5 In the second operating mode M2 ​​shown, the first throttling element 6 is closed to cut off the second pipe b, and the second throttling element 5 is open. The second throttling element 5 connects the fifth pipe e and the eighth pipe h, so that the refrigerant flowing out from the third junction C can only enter the fifth pipe e, and flow through the second throttling element 5 and the evaporator 4, and then flow into the eighth pipe h.

[0045] The second throttling element 5 includes multiple expansion valves 51 and 52 connected in parallel; the evaporator 4 includes multiple heat exchangers 41 and 42 connected in parallel. The expansion valves 51 and 52 are connected in parallel with the heat exchangers 41 and 42. Depending on their function, the heat exchangers 41 and 42 can be finned heat exchangers for cooling air, cooling plates for cooling batteries, or heat exchangers for cooling refrigerant. The expansion valves 51 and 52 can be opened simultaneously or only one can be opened as needed. The expansion valves 51 and 52 can be electronic expansion valves.

[0046] When the evaporator temperature of evaporator 4 is lower than the dew point temperature of the air, water vapor in the air will condense, thereby reducing the humidity of the air and enabling the air conditioning system 100 to have a dehumidification function. To prevent the air temperature from being too low, a device for heating the air (not shown in the attached diagram), such as a PTC heater, can be installed downstream of evaporator 4 to raise the air temperature to a normal level. In addition, the heat released by condenser 3 can also be used to heat the air.

[0047] To improve the performance of the air conditioning system 100, the air conditioning system 100 further comprises a liquid accumulator dryer 9 and an intermediate heat exchanger 8, the inlet 9a of the liquid accumulator dryer 9 is used to receive the condensed refrigerant which has not been throttled; the intermediate heat exchanger 8 comprises a first heat exchange part 81 and a second heat exchange part 82; the first heat exchange part 81 is in communication with the outlet 9b of the liquid accumulator dryer 9 to receive the refrigerant flowing out of the liquid accumulator dryer 9; the second heat exchange part 82 is used to receive the throttled and evaporated refrigerant. The liquid accumulator dryer 9 is also called a drying bottle. The condensed refrigerant which has not been throttled flowing into the inlet 9a of the liquid accumulator dryer 9 can be in a gas-liquid mixed state, and the refrigerant flowing out of the outlet 9b is in a liquid state. Therefore, the liquid accumulator dryer 9 can separate the liquid refrigerant and the solid refrigerant. Therefore, the refrigerant flowing into the first heat exchange part 81 is in a liquid state and in a condensed but not evaporated state.

[0048] In addition, the liquid accumulator dryer 9 can store a part of the liquid refrigerant to store the excess refrigerant in different working modes.

[0049] Specifically, the first heat exchange part 81 is arranged on the third pipeline c, and the second heat exchange part 82 is arranged on the suction pipeline X. The liquid accumulator dryer 9 is arranged on the third pipeline c, the inlet 9a of the liquid accumulator dryer 9 is in communication with the second joint point B. The outlet 9b of the liquid accumulator dryer 9 is in communication with the first heat exchange part 81. The first heat exchange part 81 is in communication with the third joint point C.

[0050] Since the refrigerant flowing through the first heat exchange part 81 and the refrigerant flowing through the second heat exchange part 82 can exchange heat, the condensed refrigerant which has not been throttled in the first heat exchange part 81 can transfer heat to the throttled and evaporated refrigerant in the second heat exchange part 82, thereby reducing the temperature of the refrigerant flowing out of the first heat exchange part 81, so that the temperature of the refrigerant after being throttled can also be reduced accordingly, thereby improving the performance of the air conditioning system. In addition, this technical solution also improves the superheat degree of the refrigerant flowing out of the second heat exchange part 82, and reduces the probability of the liquid refrigerant being sucked into the compressor.

[0051] Figures 6 to 11 Another embodiment of the present application is shown. Compared with the foregoing embodiment, the same parts are marked with the same reference numerals.

[0052] In Figures 6 to 11In the illustrated embodiment, the exhaust pipe P of the compressor 1 includes a first exhaust pipe P1, a second exhaust pipe P2, and a third exhaust pipe P3. The first exhaust pipe P1, the second exhaust pipe P2, and the third exhaust pipe P3 are connected to and communicate with the seventh junction point G. The third exhaust pipe P3 communicates with the exhaust port 1b of the compressor 1. The second reversible pipe 12, the seventh pipe g, and the second exhaust pipe P2 are all connected to and communicate with the fifth junction point E. The first pipe a, the third pipe c, and the first exhaust pipe P1 are all connected to and communicate with the second junction point B.

[0053] The condenser 3 is provided on the first exhaust pipe P1, and the fourth shut-off element 76 is provided on the first exhaust pipe P1 and in series with the condenser 3. The fifth shut-off element 77 is provided on the second exhaust pipe P2.

[0054] As shown in FIG. 11, in the second working mode M2, the fourth shut-off element 76 is in an open state, and the fifth shut-off element 77 is in a closed state. The reversible heat exchanger 2 and the evaporator 4 are connected in parallel between the third junction point C and the sixth junction point F, and the reversible heat exchanger 2 and the evaporator 4 can selectively work according to requirements to evaporate the refrigerant. Figure 7 8 As shown in FIG. 11, in the second working mode M2, the fourth shut-off element 76 is in an open state, and the fifth shut-off element 77 is in a closed state. The reversible heat exchanger 2 and the evaporator 4 are connected in parallel between the third junction point C and the sixth junction point F, and the reversible heat exchanger 2 and the evaporator 4 can selectively work according to requirements to evaporate the refrigerant.

[0055] As shown in FIG. 11, in the second working mode M2, the fourth shut-off element 76 is in an open state, and the fifth shut-off element 77 is in a closed state. The reversible heat exchanger 2 and the evaporator 4 are connected in parallel between the third junction point C and the sixth junction point F, and the reversible heat exchanger 2 and the evaporator 4 can selectively work according to requirements to evaporate the refrigerant. Figure 7 As shown in FIG. 11, in the second working mode M2, the fourth shut-off element 76 is in an open state, and the fifth shut-off element 77 is in a closed state. The reversible heat exchanger 2 and the evaporator 4 are connected in parallel between the third junction point C and the sixth junction point F, and the reversible heat exchanger 2 and the evaporator 4 can selectively work according to requirements to evaporate the refrigerant.

[0056] Figure 8 As shown in FIG. 11, in the second working mode M2, the fourth shut-off element 76 is in an open state, and the fifth shut-off element 77 is in a closed state. The reversible heat exchanger 2 and the evaporator 4 are connected in parallel between the third junction point C and the sixth junction point F, and the reversible heat exchanger 2 and the evaporator 4 can selectively work according to requirements to evaporate the refrigerant.

[0057] As shown in FIG. 11, in the second working mode M2, the fourth shut-off element 76 is in an open state, and the fifth shut-off element 77 is in a closed state. The reversible heat exchanger 2 and the evaporator 4 are connected in parallel between the third junction point C and the sixth junction point F, and the reversible heat exchanger 2 and the evaporator 4 can selectively work according to requirements to evaporate the refrigerant. Figure 9 10 As shown in FIG. 11, in the second working mode M2, the fourth shut-off element 76 is in an open state, and the fifth shut-off element 77 is in a closed state. The reversible heat exchanger 2 and the evaporator 4 are connected in parallel between the third junction point C and the sixth junction point F, and the reversible heat exchanger 2 and the evaporator 4 can selectively work according to requirements to evaporate the refrigerant.

[0058] As shown in FIG. 11, in the second working mode M2, the fourth shut-off element 76 is in an open state, and the fifth shut-off element 77 is in a closed state. The reversible heat exchanger 2 and the evaporator 4 are connected in parallel between the third junction point C and the sixth junction point F, and the reversible heat exchanger 2 and the evaporator 4 can selectively work according to requirements to evaporate the refrigerant. Figure 9 ​​​As shown, in the second operating mode M2, the third cut-off element 75 opens to connect the seventh pipe g, the fourth cut-off element 76 opens to connect the first exhaust pipe P1, and the fifth cut-off element 77 closes to disconnect the second exhaust pipe P2. The second throttling element 5 is in the closed state. The refrigerant flowing from the exhaust port 1b of the compressor 1 flows into the first exhaust pipe P1 via the third exhaust pipe P3 and into the condenser 3, where it condenses and releases heat. The reversible heat exchanger 2 is used to receive the refrigerant throttled by the first throttling element 6, thereby evaporating the throttled refrigerant. No refrigerant passes through the evaporator 4.

[0059] like Figure 10 As shown, in the second operating mode M2, the third cut-off element 75 is open to connect the seventh pipe g, the fourth cut-off element 76 is open to connect the first exhaust pipe P1, and the fifth cut-off element 77 is closed to disconnect the second exhaust pipe P2. The second throttling element 5 is in the open state. The refrigerant flowing from the exhaust port 1b of the compressor 1 flows into the first exhaust pipe P1 via the third exhaust pipe P3 and into the condenser 3, where it condenses and releases heat. The reversible heat exchanger 2 is used to receive the refrigerant throttled by the first throttling element 6, thereby evaporating the throttled refrigerant. Refrigerant passes through the evaporator 4.

[0060] like Figure 11 As shown, in the second operating mode M2, the fourth cut-off element 76 is open, the fifth cut-off element 77 is closed, and the third cut-off element 75 is closed. Refrigerant flows through the evaporator 4. No refrigerant flows through the reversible heat exchanger 2.

[0061] Although the present invention has been disclosed above with reference to preferred embodiments, it is not intended to limit the present invention. Any person skilled in the art can make possible changes and modifications without departing from the spirit and scope of the present invention. Any modifications, equivalent changes and alterations made to the above embodiments based on the technical essence of the present invention without departing from the content of the technical solution of the present invention shall fall within the protection scope defined by the claims of the present invention.

Claims

1. An air conditioning system comprising a receiver dryer (9), an inlet (9a) of the receiver dryer (9) being arranged to receive refrigerant which is condensed but not throttled, characterised in that, The air conditioning system (100) further comprises an intermediate heat exchanger (8) and a reversible heat exchanger (2); The intermediate heat exchanger (8) comprises a first heat exchange part (81) and a second heat exchange part (82); the first heat exchange part (81) is used for receiving refrigerant flowing out from an outlet (9b) of the liquid accumulator dryer (9); The second heat exchange part (82) is arranged to receive throttled and evaporated refrigerant; The reversible heat exchanger (2) has a first port (2a) and a second port (2b); Wherein, the refrigerant condensed by the reversible heat exchanger (2) flows into the reversible heat exchanger (2) through the second port (2b) and flows out of the reversible heat exchanger (2) through the first port (2a); or The refrigerant evaporated by the reversible heat exchanger (2) flows into the reversible heat exchanger (2) through the first port (2a) and flows out of the reversible heat exchanger (2) through the second port (2b), The air conditioning system (100) further comprises a first throttling element (6), a first reversible pipeline (11), a first one-way conducting element (71), a first pipeline (a), a second pipeline (b) and a first junction point (A); The first port (2a) communicates with the first reversible pipeline (11); the first reversible pipeline (11), the first pipeline (a) and the second pipeline (b) are all connected with and communicate with the first junction point (A); the first throttling element (6) is arranged on the second pipeline (b); The first one-way conducting element (71) is arranged on the first pipeline (a), wherein an inlet (71a) of the first one-way conducting element (71) communicates with the first junction point (A) to prevent refrigerant from flowing into the first junction point (A) through the first pipeline (a), The air conditioning system (100) further comprises a second one-way conducting element (72); the second one-way conducting element (72) is arranged on the second pipeline (b), wherein an outlet (72b) of the second one-way conducting element (72) communicates with the first junction point (A); an inlet (72a) of the second one-way conducting element (72) communicates with an outlet (6b) of the first throttling element (6), The air conditioning system (100) further comprises a first cut-off element (73), a second junction point (B), a third junction point (C), a third pipeline (c), a fourth pipeline (d) and a fifth pipeline (e); the first cut-off element (73) is arranged on the fourth pipeline (d); the liquid accumulator dryer (9) and the first heat exchange part (81) are both arranged on the third pipeline (c); The first pipeline (a), the third pipeline (c) and the fourth pipeline (d) are all connected with and communicate with the second junction point (B), wherein an inlet (9a) of the liquid accumulator dryer (9) communicates with the second junction point (B); the second pipeline (b), the third pipeline (c) and the fifth pipeline (e) are all connected with and communicate with the third junction point (C), wherein the first heat exchange part (81) communicates with the third junction point (C); The outlet (71b) of the first one-way conducting element (71) is communicated with the second junction point (B); the inlet (6a) of the first throttling element (6) is communicated with the third junction point (C); The air conditioning system (100) further comprises an evaporator (4) and a second throttling element (5); the second throttling element (5) comprises a plurality of expansion valves (51, 52) arranged in parallel with each other; the evaporator (4) comprises a plurality of heat exchangers (41, 42) arranged in parallel with each other.

2. The air conditioning system of claim 1, wherein, The air conditioning system (100) further comprises a second reversible pipeline (12), a second cut-off element (74), a third cut-off element (75), a condenser (3), a fourth junction point (D), a fifth junction point (E), a sixth pipeline (f), a seventh pipeline (g) and an exhaust pipeline (P); the condenser (3) is arranged on the exhaust pipeline (P); the second cut-off element (74) is arranged on the sixth pipeline (f); the third cut-off element (75) is arranged on the seventh pipeline (g). The second port (2b) is communicated with the second reversible pipeline (12); the fourth pipeline (d), the sixth pipeline (f) and the exhaust pipeline (P) are all connected with and communicated with the fourth junction point (D); the second reversible pipeline (12), the seventh pipeline (g) and the sixth pipeline (f) are all connected with and communicated with the fifth junction point (E).

3. The air conditioning system of claim 2, wherein, The air conditioning system (100) further comprises a sixth junction point (F), an eighth pipeline (h) and a suction pipeline (X); The seventh pipeline (g), the eighth pipeline (h) and the suction pipeline (X) are all connected with and communicated with the sixth junction point (F); the second throttling element (5) and the evaporator (4) are connected in series with the fifth pipeline (e) and the eighth pipeline (h); The second heat exchange part (82) is arranged on the suction pipeline (X).

4. The air conditioning system of claim 3, wherein, The evaporator (4) comprises a refrigeration plate; the refrigeration plate is used for cooling the battery. The evaporator (4) comprises a refrigeration plate; the refrigeration plate is used for cooling the battery.

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