Air conditioner

Abstract

The utility model discloses an air conditioner, and belongs to the technical field of air treatment. The air conditioner comprises a shell provided with a bottom plate; the outdoor heat exchanger is arranged in the shell and comprises a first heat exchanger and a second heat exchanger which are vertically divided, and the first heat exchanger is located below the second heat exchanger; the first ends of the first flow dividing pipes are connected with the first heat exchanger; the flow dividing end of the first flow divider is connected with the second end of the first flow dividing pipe; the first ends of the second flow dividing pipes are connected with the second heat exchanger; the flow dividing end of the second flow divider is connected with the second end of the second flow dividing pipe; the height from the flow dividing end of the first flow divider to the bottom plate is H1, and the height from the first end of the first flow dividing pipe at the lowest position to the bottom plate is Hn1; h1 is less than 3Hn1; the height from the boundary of the first heat exchanger and the second heat exchanger to the bottom plate is H0, the height from the flow dividing end of the second flow divider to the bottom plate is H2, and the height from the first end of the second flow dividing pipe at the lowest position to the bottom plate is Hn2; and H2 is less than 3Hn < 2 >-2H0. The air conditioner can effectively solve the problem of refrigerant stockpiling of the outdoor unit.

Description

TECHNICAL FIELD

[0001] The present application relates to the field of air treatment, in particular to an air conditioner. BACKGROUND

[0002] When the air conditioner is in a small load refrigeration operation, the suction and discharge pressure of the compressor is low, and a large amount of refrigerant is accumulated in the lower part of the outdoor heat exchanger, which reduces the circulation of refrigerant in the circulation system and causes the refrigerant in the outdoor liquid pipe to have no supercooling degree. In order to ensure the refrigeration effect, the opening degree of the electronic expansion valve of the air conditioner is increased, and a large amount of gas-liquid two-phase refrigerant flows into the indoor unit of the air conditioner, which increases the refrigerant sound under the refrigeration working condition of the indoor unit, and the indoor unit produces a loud "hissing" sound during operation. In a quiet environment such as a bedroom, study or office, the refrigerant sound will affect the rest and work of the user, and seriously affect the user experience. SUMMARY

[0003] The present application provides an air conditioner which can effectively solve the problem of refrigerant accumulation in the outdoor unit.

[0004] In one aspect of the present application, an air conditioner comprises: a shell having a bottom plate; an outdoor heat exchanger arranged in the shell; a plurality of first shunt pipes, the first end of the first shunt pipe being connected to the outdoor heat exchanger; a first shunt device, the shunt end of the first shunt device being connected to the second end of the first shunt pipe; wherein the height of the first shunt device from the bottom plate is H1, and the height of the first end of the lowest first shunt pipe from the bottom plate is H n1 ; H1<3H n1 .

[0005] In this technical solution, H1<3H n1 , which can make the flow rate of the refrigerant flowing into the shunt device greater than 0, thereby improving the refrigerant accumulation phenomenon, significantly reducing the indoor refrigerant sound, and improving the user's listening experience.

[0006] In another aspect of the present application, an air conditioner comprises: a shell having a bottom plate; an outdoor heat exchanger arranged in the shell, the outdoor heat exchanger comprising a first heat exchanger and a second heat exchanger divided vertically, wherein the first heat exchanger is located below the second heat exchanger; a plurality of first shunt pipes, the first end of the first shunt pipe being connected to the first heat exchanger; a first shunt device, the shunt end of the first shunt device being connected to the second end of the first shunt pipe; a plurality of second shunt pipes, the first end of the second shunt pipe being connected to the second heat exchanger; a second shunt device, the shunt end of the second shunt device being connected to the second end of the second shunt pipe; wherein the height of the shunt end of the first shunt device from the bottom plate is H1, and the height of the first end of the lowest first shunt pipe from the bottom plate is H n1 ; H1<3H n1 ;

[0007] The height of the demarcation line of the first heat exchanger and the second heat exchanger to the bottom plate is H0, the height of the shunt end of the second shunt to the bottom plate is H2, and the height of the first end of the second shunt pipe in the lowest position to the bottom plate is H n2 ; H2<3H n2 -2H0.

[0008] In the technical scheme, the outdoor heat exchanger is divided into upper and lower parts, the height of the demarcation line of the first heat exchanger and the second heat exchanger to the bottom plate is H0, for the first heat exchanger below, H1<3H n1 , so that the flow rate of the refrigerant flowing into the first shunt is greater than 0, and for the second heat exchanger above, H2<3H n2 -2H0, so that the flow rate of the refrigerant flowing into the second shunt is greater than 0, thereby improving the refrigerant accumulation phenomenon, significantly reducing the indoor refrigerant sound, and improving the user's listening experience.

[0009] In some embodiments, the height of the top end of the outdoor heat exchanger to the bottom plate is H, H1<min{3H n1 , 0.25H}.

[0010] In the technical scheme, by setting H1<min{3H n1 , 0.25H}, the first shunt pipe in the lower position is closer to the first shunt, and the length of the first shunt pipe in the lower position can be shorter, thereby reducing the resistance of the refrigerant in the shunt pipe, further ensuring that the refrigerant can flow into the first shunt, thereby improving the refrigerant accumulation phenomenon and reducing the indoor refrigerant sound.

[0011] In some embodiments, the height of the top end of the outdoor heat exchanger to the bottom plate is H, H2<min{3H n2 -2H0, 0.75H}.

[0012] In the technical scheme, by setting H2<min{3H n2 -2H0, 0.75H}, the second shunt pipe in the lower position is closer to the second shunt, and the length of the second shunt pipe in the lower position can be shorter, thereby reducing the resistance of the refrigerant in the second shunt pipe, further ensuring that the refrigerant can flow into the second shunt, thereby improving the refrigerant accumulation phenomenon and reducing the indoor refrigerant sound.

[0013] In some embodiments, the outdoor heat exchanger includes fins and heat transfer pipes connected to the fins;

[0014] The vertical distance from the highest position of the heat transfer pipe of the first heat exchanger to the demarcation line is equal to the vertical distance from the lowest position of the heat transfer pipe of the second heat exchanger to the demarcation line.

[0015] In some embodiments, H2<H n2 .

[0016] In this technical solution, since the second flow divider is lower than the position of the second flow divider pipe, the liquid refrigerant can be smoothly guided from the branch heat transfer pipes of the second heat exchanger to the second flow divider during refrigeration operation, and will not accumulate at the bottom position of the second heat exchanger.

[0017] In some embodiments, the height of the first flow divider is higher than the first end of the first flow divider pipe at the lowest position.

[0018] In this technical solution, the height of the first flow divider is not too low, so that there is enough space between the first flow divider and the bottom plate to arrange the refrigerant pipe connected to the confluence end of the first flow divider.

[0019] In some embodiments, the flow end of the first flow divider is located at the upper end of the first flow divider, and the flow end of the second flow divider is located at the upper end of the second flow divider.

[0020] In some embodiments, the air conditioner further comprises: a first flow collector pipe connected to the end of the first heat exchanger away from the first flow divider pipe; and a second flow collector pipe connected to the end of the second heat exchanger away from the second flow divider pipe. BRIEF DESCRIPTION OF DRAWINGS

[0021] Figure 1 A refrigerant circuit schematic diagram of an air conditioner according to some embodiments is shown;

[0022] Figure 2 A refrigerant circuit schematic diagram of an air conditioner according to some other embodiments is shown;

[0023] Figure 3 A top view of the internal structure of an air conditioner according to some embodiments is shown;

[0024] Figure 4 A partial view of the outdoor heat exchanger of an air conditioner according to some embodiments is shown;

[0025] Figure 5 And Figure 6 A schematic view of the outdoor heat exchanger and flow divider of an air conditioner according to some embodiments is shown;

[0026] Figure 7 A side view of the internal structure of an air conditioner according to some embodiments is shown;

[0027] Figure 8 And Figure 9 A schematic view of the outdoor heat exchanger and flow divider of an air conditioner according to some other embodiments is shown;

[0028] Figure 10 A test data graph showing the noise comparison of a prototype machine and the present application is shown.

[0029] In the above figures, 1, compressor; 2, four-way valve; 3, outdoor heat exchanger; 301, first heat exchanger; 302, second heat exchanger; 31, heat transfer pipe; 32, fin; 4, outdoor throttling device; 5, indoor heat exchanger; 6, outdoor fan; 7, indoor fan; 8, indoor throttling device; 91, branch pipe; 911, first branch pipe; 912, second branch pipe; 92, flow divider; 921, first flow divider; 922, second flow divider; 93, collecting pipe; 931, first collecting pipe; 932, second collecting pipe; 100, housing; 101, bottom plate. DETAILED DESCRIPTION

[0030] In order to make the purpose and implementation of the present application more clear, the exemplary implementation of the present application will be described clearly and completely below in combination with the drawings of the exemplary implementation of the present application. Obviously, the described exemplary implementation is only a part of the implementation of the present application, but not all of the implementation.

[0031] In the description of the present application, it needs to be understood that the orientation or position relationship indicated by the terms "center", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer" and the like is based on the orientation or position relationship shown in the drawings, and is only for the convenience of describing the present application and simplifying the description, and is not intended to indicate or imply that the indicated device or element must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as a limitation on the present application.

[0032] The terms "first", "second" are only for the purpose of description, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined with "first", "second" can explicitly or implicitly include one or more of the features. In the description of the present application, the meaning of "a plurality of" is two or more, unless otherwise specified.

[0033] In the description of the present application, it needs to be explained that, unless otherwise explicitly specified and limited, the terms "mounting", "connecting", "connection" should be understood broadly, for example, it can be fixed connection, or detachable connection, or integrally connected; it can be mechanical connection, or electrical connection; it can be directly connected, or indirectly connected through intermediate medium, or the communication inside two elements. For those skilled in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances.

[0034] In the present application, the air conditioner performs the refrigeration cycle of the air conditioner by using the compressor, the condenser, the expansion valve and the evaporator. The refrigeration cycle includes a series of processes involving compression, condensation, expansion and evaporation, and supplies refrigerant to the air that has been adjusted and heat exchanged.

[0035] The compressor compresses the refrigerant gas in a low-temperature and low-pressure state and discharges the compressed refrigerant gas. The discharged refrigerant gas flows into the condenser. The condenser condenses the compressed refrigerant into a liquid phase, and heat is released to the surrounding environment through the condensation process.

[0036] The expansion valve expands the liquid-phase refrigerant in a high-temperature and high-pressure state condensed in the condenser into a low-pressure liquid phase. The evaporator evaporates the refrigerant expanded in the expansion valve and returns the refrigerant gas in a low-temperature and low-pressure state to the compressor. The evaporator can achieve a refrigeration effect by exchanging heat with a material to be cooled using latent heat of evaporation of the refrigerant. Throughout the cycle, the air conditioner can adjust the temperature of an indoor space.

[0037] The outdoor unit of the air conditioner refers to a portion of the refrigeration cycle including the compressor and the outdoor heat exchanger, the indoor unit of the air conditioner includes the indoor heat exchanger, and the expansion valve can be provided in the indoor unit or the outdoor unit.

[0038] The indoor heat exchanger and the outdoor heat exchanger function as a condenser or an evaporator. When the indoor heat exchanger functions as a condenser, the air conditioner functions as a heater in a heating mode, and when the indoor heat exchanger functions as an evaporator, the air conditioner functions as a cooler in a cooling mode.

[0039] When the outdoor unit and the indoor unit of the air conditioner are in a split structure, the outdoor unit is also referred to as an outdoor machine, and the indoor unit is also referred to as an indoor machine.

[0040] Reference Figure 1 According to the air conditioner of the embodiment of the present application, an outdoor machine is located in an outdoor space to perform heat exchange between a refrigerant and outdoor air, and an indoor machine is located in an indoor space to perform heat exchange between the refrigerant and indoor air.

[0041] The outdoor machine is provided with a compressor 1 to compress the refrigerant, a four-way valve 2 to guide the refrigerant compressed by the compressor to an outdoor heat exchanger 3 or an indoor heat exchanger 5, the outdoor heat exchanger 3 to condense the refrigerant introduced thereto in cooling and evaporate the refrigerant flowing thereto in heating, and an outdoor throttling device 4 to decompress the refrigerant. The indoor machine is provided with the indoor heat exchanger 5 to evaporate the refrigerant flowing thereto in cooling and condense the refrigerant introduced thereto in heating.

[0042] The compressor 1, the four-way valve 2, the outdoor heat exchanger 3, the outdoor throttling device 4, and the indoor heat exchanger 5 are sequentially connected by refrigerant pipes to constitute a refrigerant circulation loop.

[0043] In the outdoor unit, the outdoor fan 6 is arranged opposite to the outdoor heat exchanger 3. The outdoor fan 6 includes an outdoor fan and a motor driving the outdoor fan to rotate. The rotation of the outdoor fan causes outdoor air to flow, and the outdoor air exchanges heat with the refrigerant in the outdoor heat exchanger 3 when passing through the outdoor heat exchanger 3.

[0044] In the indoor unit, the indoor fan 7 is arranged opposite to the indoor heat exchanger 5. The indoor fan 7 includes an indoor fan and a motor driving the indoor fan to rotate. The rotation of the indoor fan causes indoor air to flow, and the indoor air exchanges heat with the refrigerant in the indoor heat exchanger 5 when passing through the indoor heat exchanger 5.

[0045] In the cooling operation, Figure 1 The solid line arrow in the figure indicates the flow direction of the refrigerant. The high-temperature and high-pressure gaseous refrigerant discharged from the compressor 1 flows into the outdoor heat exchanger 3 through the four-way valve 2. At the outdoor heat exchanger 3, the gaseous refrigerant exchanges heat with outdoor air and is cooled, and the refrigerant gradually changes from the gaseous state to the liquid state during the flow through the outdoor heat exchanger 3.

[0046] The liquid refrigerant led out of the outdoor heat exchanger 3 is guided to the outdoor throttling device 4 to be decompressed to become a gas-liquid two-phase state.

[0047] The refrigerant flowing out of the outdoor throttling device 4 is continuously guided to the indoor heat exchanger 5 to exchange heat with indoor air driven by the indoor fan 7 and evaporate. The temperature of the indoor air is lowered and blown into the indoor. In the indoor heat exchanger 5, the refrigerant changes from the gas-liquid two-phase state to the gaseous state.

[0048] The gaseous refrigerant coming out of the indoor heat exchanger 5 returns to the compressor 1, thereby forming a cooling cycle.

[0049] In the heating operation, the dotted line arrow in the figure indicates the flow direction of the refrigerant. The four-way valve 2 is reversed, and the gaseous refrigerant discharged from the compressor 1 is guided to the opposite direction of the cooling cycle and circulates.

[0050] The present application is also applicable to a multi-split air conditioner. Referring to Figure 2 In the multi-split air conditioner, there are multiple indoor units. An indoor throttling device 8 is further arranged in the indoor unit to decompress the refrigerant introduced into the indoor heat exchanger 5.

[0051] In the cooling operation, the refrigerant is decompressed by the indoor throttling device 8 and then flows to the indoor heat exchanger 5. In the heating operation, the refrigerant is decompressed by the outdoor throttling device 4 and then flows to the outdoor heat exchanger 3.

[0052] The following will be introduced by taking the outdoor unit of an air conditioner as an example:

[0053] In some embodiments, referring to Figure 3The air conditioner comprises a housing 100. The housing 100 constitutes the general appearance of the outdoor unit. The housing 100 can be a cuboid box. The housing 100 comprises a bottom plate 101 constituting the bottom structure. The outdoor heat exchanger 3 is arranged in the housing 100.

[0054] In some embodiments, with reference to Figure 4 The outdoor heat exchanger 3 comprises heat transfer pipes 31 for flowing refrigerant thereon; and fins 32 connected to the heat transfer pipes 31 to increase the heat exchange efficiency between the refrigerant and air by increasing the surface area of the heat transfer pipes 31.

[0055] In some embodiments, the heat transfer pipes 31 can be copper pipes.

[0056] In some embodiments, the heat transfer pipes 31 comprise a plurality of U-shaped pipes penetrating through the fins 32.

[0057] The heat transfer pipes 31 comprise bent pipes. The bent pipes are connected to the two ends of the U-shaped pipes and form a meandering shape together with the U-shaped pipes.

[0058] In some embodiments, with reference to Figure 5 and Figure 6 The air conditioner comprises a plurality of shunt pipes 91. The two ends of the shunt pipes 91 are a first end of the shunt pipe 91 and a second end of the shunt pipe 91, respectively. The first end of the shunt pipe 91 is connected to the heat transfer pipe 31 of the outdoor heat exchanger 3.

[0059] The plurality of shunt pipes 91 comprises a shunt pipe 91_1, a shunt pipe 91_2,..., a shunt pipe 91_(n-1), and a shunt pipe 91_n.

[0060] Among the first ends of the plurality of shunt pipes 91, the first end of the shunt pipe 91_n is at the lowest position.

[0061] The air conditioner comprises a shunt device 92. The shunt end 92a of the shunt device 92 is connected to the second end of the shunt pipe 91. The confluence end 92b of the shunt device 92 is connected to the outdoor throttling device 4.

[0062] In some embodiments, the shunt end 92a of the shunt device 92 is located at the upper end of the shunt device 92. The confluence end 92b of the shunt device 92 is located at the lower end of the shunt device 92.

[0063] In some embodiments, the air conditioner can comprise a collecting pipe 93. The collecting pipe 93 is connected to the end of the outdoor heat exchanger 3 away from the shunt pipe 91. The collecting pipe 93 and the shunt pipe 91 are connected to the opposite ends of the outdoor heat exchanger 3, respectively.

[0064] During refrigeration operation, the refrigerant flows from the collecting pipe 93 to the outdoor heat exchanger 3, and then flows to the shunt device 92 through the shunt pipe 91.

[0065] The height of the top end of the outdoor heat exchanger 3 to the bottom plate 101 is H. The height of the first end of the shunt pipe 91_n to the bottom plate 101 is H n1 . The height of the shunt end 92a of the shunt 92 to the bottom plate 101 is H1.

[0066] The pressure, flow rate, and energy loss of the refrigerant flowing into the shunt pipe 91_n during refrigeration are P n1 , V n1 , and h n1 , respectively. The pressure and flow rate of the refrigerant flowing into the shunt 92 are P1 and V1, respectively. According to the Bernoulli equation, we have:

[0067]

[0068] In the formula, p is the refrigerant density, and g is the acceleration of gravity. To ensure that the refrigerant entering the shunt pipe 91 can smoothly flow into the shunt 92, the flow rate V1 of the refrigerant flowing from the shunt pipe 91_n into the shunt 92 needs to be greater than 0, so the equation can be changed to:

[0069]

[0070] If the flow rate V1 cannot be greater than 0, the refrigerant will accumulate. The refrigerant will accumulate in the height range of 0~H n1 of the heat exchanger, which will cause the storage of liquid refrigerant in this area, causing no subcooling degree before the refrigerant enters the indoor unit. To ensure the refrigeration capacity at small loads, the opening degree of the indoor throttling device increases, causing the refrigerant sound of the indoor unit to increase.

[0071] To improve the refrigerant accumulation phenomenon of the outdoor heat exchanger, according to the pressure, flow rate, and energy loss of the refrigerant flowing into the shunt pipe 91_n, which are P n1 , V n1 , and h n1 , respectively, and the pressure and flow rate of the refrigerant flowing into the shunt 92, which are P1 and V1, respectively, as well as the internal resistance of the heat exchanger and other parameters, the position of the shunt 92 is redesigned.

[0072] In some embodiments, H1<3H n1 . The height of the shunt 92 is within this range, which can make the flow rate V1 of the refrigerant flowing into the shunt 92 be greater than 0, thereby improving the refrigerant accumulation phenomenon and significantly reducing the indoor refrigerant sound, thereby improving the user's listening experience.

[0073] In some embodiments, the height of the shunt 92 also satisfies: H1<3H n1 , and H1<0.25H. That is, H1<min{3H n1 , 0.25H}. H1 is less than the minimum of 3H n1 and 0.25H.

[0074] When H1 < 0.25H, the flow distributor 92 can be closer to the lower part of the outdoor heat exchanger 3, so that the flow distributor 92 is closer to the flow distribution pipe at the lower position, and the length of the flow distribution pipe at the lower position can be set to be shorter, thereby reducing the resistance of the refrigerant in the flow distribution pipe. When H1 < 0.25H, the flow distributor 92 can be closer to the lower part of the outdoor heat exchanger 3, so that the flow distributor 92 is closer to the flow distribution pipe at the lower position, and the length of the flow distribution pipe at the lower position can be set to be shorter, thereby reducing the resistance of the refrigerant in the flow distribution pipe.

[0075] In some embodiments, with reference to Figure 7 to Figure 9 , the outdoor heat exchanger 3 is in an upper and lower partitioned structure. The outdoor heat exchanger 3 can be divided into a first heat exchanger 301 located at the lower part and a second heat exchanger 302 located at the upper part.

[0076] The first heat exchanger 301 and the second heat exchanger 302 are respectively connected to a header 93. The first heat exchanger 301 is connected to a first header 931, and the second heat exchanger 302 is connected to a second header 932.

[0077] The first heat exchanger 301 and the second heat exchanger 302 are respectively connected to a flow distributor. The first heat exchanger 301 is connected to a first flow distributor 921 through a first flow distribution pipe 911. The second heat exchanger 302 is connected to a second flow distributor 922 through a second flow distribution pipe 912.

[0078] The first header 931 and the first flow distribution pipe 911 are respectively connected to both ends of the first heat exchanger 301. The second header 932 and the second flow distribution pipe 912 are respectively connected to both ends of the second heat exchanger 302.

[0079] In some embodiments, the first flow distribution pipe 911 includes a first flow distribution pipe 911_1, a first flow distribution pipe 911_2,..., a first flow distribution pipe 911_(n-1), and a first flow distribution pipe 911_n.

[0080] Among the first ends of the plurality of first flow distribution pipes 911, the first end of the first flow distribution pipe 911_n is at the lowest position.

[0081] The height of the first end of the first flow distribution pipe 911_n to the bottom plate 101 is H n1 . The height of the flow distribution end 921a of the first flow distributor 921 to the bottom plate 101 is H1.

[0082] The second flow distribution pipe 912 includes a second flow distribution pipe 912_1, a second flow distribution pipe 912_2,..., a second flow distribution pipe 912_(n-1), and a second flow distribution pipe 912_n.

[0083] Among the first ends of the plurality of second flow distribution pipes 912, the first end of the second flow distribution pipe 912_n is at the lowest position.

[0084] The height of the first end of the second flow distribution pipe 912_n to the bottom plate 101 is H n2 . The height of the flow distribution end 922a of the second flow distributor 922 to the bottom plate 101 is H2.

[0085] The pressure, flow rate and energy loss of the refrigerant flowing into the first shunt pipe 911_n are P n1 , V n1 and h n1 respectively; and the pressure, flow rate and energy loss of the refrigerant flowing into the second shunt pipe 912_n are P n2 , V n2 and h n2 respectively.

[0086] The pressure and flow rate of the refrigerant flowing into the first shunt 921 are P1 and V1 respectively; and the pressure and flow rate of the refrigerant flowing into the second shunt 922 are P2 and V2 respectively.

[0087] According to Bernoulli equation, we have:

[0088]

[0089] To ensure that the refrigerant entering the shunt pipe 91 can smoothly flow into the first shunt 921 and the second shunt 922, the flow rates V1 and V2 need to be greater than 0, so the equation can be changed to:

[0090]

[0091] If the flow rates V1 and V2 cannot be greater than 0, the refrigerant will accumulate. The refrigerant will accumulate in the height range of (0~H n1 ) and (H0~H n2 ) of the outdoor heat exchanger, which will cause the region to store liquid refrigerant, causing no subcooling degree before the refrigerant enters the indoor unit. To ensure the refrigeration capacity of small load, the opening degree of the indoor throttling device is increased, causing the refrigerant sound of the indoor unit to increase.

[0092] H0 is the height of the dividing line m of the first heat exchanger 301 and the second heat exchanger 302 to the bottom plate 101.

[0093] The vertical distance from the highest position of the heat transfer pipe of the first heat exchanger 301 to the dividing line m is equal to the vertical distance from the lowest position of the heat transfer pipe of the second heat exchanger 302 to the dividing line m.

[0094] To improve the refrigerant accumulation phenomenon of the outdoor heat exchanger, the positions of the first shunt 921 and the second shunt 922 are redesigned.

[0095] In some embodiments, H1<3H n1 . The height of the first shunt 921 is within this range, which can make the flow rate V1 of the refrigerant flowing into the first shunt 921>0, thereby improving the refrigerant accumulation phenomenon, significantly reducing the indoor refrigerant sound, and improving the user's listening experience.

[0096] In some embodiments, H2< H0+ 3(H n2 - H0) = 3H n2 - 2H0. The height of the second flow divider 922 is within this range, so that the flow rate V2> 0 when the refrigerant flows into the second flow divider 922, thereby improving the refrigerant accumulation phenomenon, significantly reducing the indoor refrigerant sound, and improving the user's listening experience.

[0097] In some embodiments, the height of the first flow divider 921 simultaneously satisfies: H1< 3H n1 , H1< 0.25H. That is, H1< min{3H n1 , 0.25H}. H1is less than the minimum of 3H n1 and 0.25H.

[0098] When H1< 0.25H, it can be ensured that the first flow divider 921 is closer to the lower part of the first heat exchanger 301, so that the first flow pipe at the lower position is closer to the first flow divider 921. In this way, the length of the first flow pipe at the lower position can be set to be shorter, thereby reducing the resistance of the refrigerant in the first flow pipe at the lower position.

[0099] In some embodiments, the height of the second flow divider 922 simultaneously satisfies: H2< 3H n2 - 2H0, H2< 0.75H. That is, H2< min{3H n2 - 2H0, 0.75H}. H2is less than the minimum of 3H n2 - 2H0and 0.75H.

[0100] When H2< 0.75H, it can be ensured that the second flow divider 922 is closer to the lower part of the second heat exchanger 302, so that the second flow pipe at the lower position of the second heat exchanger 302 is closer to the second flow divider 922. In this way, the length of the second flow pipe at the lower position can be set to be shorter, thereby reducing the resistance of the refrigerant in the second flow pipe at the lower position.

[0101] In some embodiments, the first heat exchanger 301 and the second heat exchanger 302 are divided by half by the outdoor heat exchanger 3, so that H0= H / 2. H2< 3H n2 - H.

[0102] In some embodiments, the first heat exchanger 301 and the second heat exchanger 302 are divided by half by the outdoor heat exchanger 3, so that H0= H / 2. H2< min{3H n2 - H, 0.75H}.

[0103] Comparative experiments were conducted on the original model and the model with the position of the flow divider adjusted according to the present application, and reference was made to Figure 10It can be seen that after adjusting the position of the flow divider, the indoor side noise is reduced by 3.6dB(A).

[0104] According to the embodiment of the present application, the first end of the first flow divider pipe 921_n extends horizontally first and then bends upward, and then bends downward to connect to the first flow divider 921.

[0105] The first end of the second flow divider pipe 922_n extends horizontally first and then bends upward, and then bends downward to connect to the second flow divider 922.

[0106] In some embodiments, the height of the first flow divider 921 is higher than the first end of the first flow divider pipe 911_n. Since the first flow divider pipe 911_n is closer to the bottom end of the outdoor heat exchanger 3, if the first flow divider 921 is lower than the first flow divider pipe 911_n, the refrigerant pipe connected to the confluence end 921b of the first flow divider 921 will not have enough space to be laid out.

[0107] In some embodiments, the first end of the second flow divider pipe 912_n is higher than the flow dividing end 922a of the second flow divider 922 in the height direction, i.e. H2 n2 .

[0108] Since the second flow divider 922 is lower than the position of the second flow divider pipe 912, during the refrigeration operation, the liquid refrigerant can be smoothly guided from the branch heat transfer pipes 31 of the second heat exchanger 302 to the second flow divider 922, and will not accumulate at the bottom position of the second heat exchanger 302.

[0109] In the above embodiments, the bottom plate 101 is used as the reference line of height. It can be understood that in other embodiments, the bottom end of the outdoor heat exchanger 3 can also be used instead of the bottom plate 101 as the reference line of height.

[0110] The height of the outdoor heat exchanger 3 is H.

[0111] The height of the demarcation line of the first heat exchanger 301 and the second heat exchanger 302 to the bottom end of the outdoor heat exchanger 3 is H0.

[0112] The height of the flow dividing end 921a of the first flow divider 921 to the bottom end of the outdoor heat exchanger 3 is H1.

[0113] The height of the flow dividing end 922a of the second flow divider 922 to the bottom end of the outdoor heat exchanger 3 is H2.

[0114] The height of the first end of the first flow divider pipe 911_n to the bottom end of the outdoor heat exchanger 3 is H n1 .

[0115] The height of the first end of the second flow divider pipe 912_n to the bottom end of the outdoor heat exchanger 3 is Hn2 .

[0116] Other height position relations are the same as the above embodiments.

[0117] Finally, it should be noted that: the above examples are used to illustrate the technical solutions of the present application, but not limited to them; although the present application has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that: it can still modify the technical solutions recorded in the foregoing embodiments, or make equivalent replacement for part or all of the technical features; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the scope of the technical solutions of the embodiments of the present application.

[0118] For the convenience of explanation, the above description has been made in combination with specific embodiments. However, the above exemplary discussion is not intended to exhaust or limit the embodiments to the specific forms disclosed above. Various modifications and variations can be derived according to the above teachings. The selection and description of the above embodiments are to better explain the principles and practical applications, so that those skilled in the art can better use the embodiments and various different modified embodiments suitable for specific use considerations.

Claims

1. An air conditioner characterized by comprising: The air conditioner comprises: a shell having a bottom plate; an outdoor heat exchanger arranged in the shell, the outdoor heat exchanger comprising a first heat exchanger and a second heat exchanger divided by a horizontal line, wherein the first heat exchanger is located below the second heat exchanger; a plurality of first shunt pipes, first ends of the first shunt pipes being connected to the first heat exchanger; a first shunt device, a shunt end of the first shunt device being connected to second ends of the first shunt pipes; a plurality of second shunt pipes, first ends of the second shunt pipes being connected to the second heat exchanger; a second shunt device, a shunt end of the second shunt device being connected to second ends of the second shunt pipes; Wherein, the height of the shunt end of the first shunt to the bottom plate is H1, the height of the first end of the first shunt pipe in the lowest position to the bottom plate is H n1 ; H1 < 3H n1 ; A height of a demarcation line of the first heat exchanger and the second heat exchanger to the bottom plate is H0, a height of a shunt end of the second shunt to the bottom plate is H2, and a height of a first end of the second shunt pipe in the lowest position to the bottom plate is H1 n2 ; H2 < 3H0 n2 - 2H0.

2. The air conditioner of claim 1, wherein The height of the top end of the outdoor heat exchanger to the bottom plate is H, and H1 < min{3H n1 , 0.25H}.

3. The air conditioner of claim 1, wherein The height of the top end of the outdoor heat exchanger to the bottom plate is H, H2 < min{3H n2 -2H0, 0.75H}.

4. The air conditioner of claim 1, wherein the outdoor heat exchanger comprising fins and heat transfer pipes connected to the fins; a vertical distance from the highest position of the heat transfer pipes of the first heat exchanger to the horizontal line being equal to a vertical distance from the lowest position of the heat transfer pipes of the second heat exchanger to the horizontal line.

5. The air conditioner of claim 1, wherein H2 < H n2 .

6. The air conditioner of claim 1, wherein a height of the first shunt device being higher than the first ends of the first shunt pipes at the lowest position.

7. The air conditioner according to any one of claims 1 to 6, characterized by the shunt end of the first shunt device being located at an upper end of the first shunt device, and the shunt end of the second shunt device being located at an upper end of the second shunt device.

8. The air conditioner according to any one of claims 1 to 6, characterized by The air conditioner further comprises: a first header pipe connected to an end of the first heat exchanger away from the first shunt pipes; a second header pipe connected to an end of the second heat exchanger away from the second shunt pipes.

9. An air conditioner characterized by comprising: The air conditioner comprises: a shell having a bottom plate; an outdoor heat exchanger arranged in the shell; a plurality of shunt pipes, first ends of the shunt pipes being connected to the outdoor heat exchanger; a shunt device, a shunt end of the shunt device being connected to second ends of the shunt pipes; wherein a height of the flow diverter to the floor is H1; a height of the first end of the flow diverter to the floor in the lowest position is H n1 ; H1 < 3H n1 .

10. The air conditioner of claim 9, wherein The height of the top end of the outdoor heat exchanger to the bottom plate is H, and H1 < min{3H n1 , 0.25H}.

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