CN218627097U - Air conditioner outdoor unit of single outdoor fan - Google Patents

Abstract

The utility model provides an air condensing units of single outdoor fan. The air conditioner outdoor unit of the single outdoor fan comprises a shell and a compressor, wherein an exhaust port is connected with an exhaust main pipe, and the outdoor fan is opposite to an outdoor air outlet; the outdoor heat exchanger comprises an inner row of heat exchange tubes arranged on the leeward side of the outdoor heat exchanger; the outer row of heat exchange tubes is arranged on the windward side of the outdoor heat exchanger and has n total flow paths, the inner row of heat exchange tubes is communicated with the outer row of heat exchange tubes through the middle row of heat exchange tubes, and the inner row of heat exchange tubes and the middle row of heat exchange tubes form 2n flow branches together; the first connecting pipes are communicated with the inner row heat exchange pipes and the exhaust main pipe, and 2n first connecting pipes are communicated with 2n flow branches in a one-to-one correspondence manner; the three-way switching part is connected with the flow main path and the flow branch paths, and the single three-way switching part is connected with the two flow branch paths and the flow main path. The utility model discloses a set up the outdoor heat exchanger's of three rows of heat exchange tubes air condensing units, effectively reduce outdoor heat exchanger's height, make single outdoor fan can cover outdoor heat exchanger.

Description

Air conditioner outdoor unit of single outdoor fan

Technical Field

The utility model relates to the technical field of household appliances, especially, relate to an air condensing units of single outdoor fan.

Background

The outdoor unit of the air conditioner comprises an outdoor heat exchanger and an outdoor fan, and when the heat exchange amount of the whole unit required by the air conditioner is high, the area of the matched outdoor heat exchanger is increased.

The air conditioner is provided with two rows of outdoor heat exchangers, and when the heat exchange area of the outdoor heat exchangers needs to be increased, the heights of the outdoor heat exchangers are often increased.

The increase in height of the outdoor heat exchanger tends to cause two problems. On one hand, if a single outdoor fan is arranged in the outdoor unit of the air conditioner, the single outdoor fan cannot cover the outdoor heat exchanger with a large height, and the heat exchange efficiency of the outdoor heat exchanger is reduced. On the other hand, if two axial fans arranged up and down are arranged in the outdoor unit of the air conditioner to blow air to the outdoor heat exchanger, the higher outdoor heat exchanger can be covered by the outdoor fan, but the installation of the two axial fans also leads to the increase of the height of the box body of the outdoor unit. When a space for installing the outdoor unit of the air conditioner is small in an outdoor environment, the outdoor unit of the air conditioner having two axial fans cannot be normally installed due to an excessively high height.

SUMMERY OF THE UTILITY MODEL

The utility model discloses solve one of the technical problem in the correlation technique at least to a certain extent.

Therefore, the application aims to provide the air conditioner outdoor unit of the single outdoor fan, and the height of the outdoor heat exchanger is effectively reduced by arranging the air conditioner outdoor unit of the outdoor heat exchanger with three rows of heat exchange tubes, so that the single outdoor fan can cover the outdoor heat exchanger.

According to the application, the air condensing units of single outdoor fan include:

a casing provided with an outdoor air inlet and an outdoor air outlet; the casing comprises a back plate opposite to the outdoor air outlet;

a compressor, which is arranged in the shell and is provided with an air suction port and an air exhaust port; an exhaust main pipe is connected to the exhaust port;

an expansion valve provided in the casing;

the outdoor fan is arranged in the shell and provided with one fan, and the fan is arranged opposite to the outdoor air outlet;

the outdoor heat exchanger is arranged in the shell and connected between the compressor and the expansion valve, and the outdoor heat exchanger is arranged between the outdoor fan and the rear back plate;

the outdoor fan drives outdoor air to enter the shell from an outdoor air inlet and flow through the outdoor heat exchanger and then flow out from the outdoor air outlet;

the outdoor heat exchanger includes: the inner row heat exchange tubes are arranged on the leeward side of the outdoor heat exchanger; the outer heat exchange tubes are arranged on the windward side of the outdoor heat exchanger and have n total flow main paths; the inner row of heat exchange tubes are communicated with the outer row of heat exchange tubes through the middle row of heat exchange tubes, and the inner row of heat exchange tubes and the middle row of heat exchange tubes jointly form 2n flow branches; the first connecting pipe is communicated with the inner row of heat exchange pipes and the exhaust main pipe, the number of the first connecting pipes is 2n, and the 2n first connecting pipes are communicated with the 2n flow branches in a one-to-one correspondence manner; a three-way junction portion connecting the flow main and the flow branches, a single three-way junction portion connecting two of the flow branches and one of the flow main; and the refrigerant flows into the inner row of heat exchange tubes, the middle row of heat exchange tubes and the outer row of heat exchange tubes and flows along the flow branch and the flow main path, and the flow branch and the flow main path are converted between the three-way switching parts.

In some embodiments of the present application, the outdoor heat exchanger further includes a second connection pipe having n number; the air conditioner outdoor unit further comprises a liquid distributor, and the second connecting pipe is connected between the liquid distributor and the outer discharge heat exchange pipe; the liquid separator is provided with n liquid separating ports and 1 total port, and the n liquid separating ports are communicated with the n second connecting pipes in a one-to-one correspondence manner; and the refrigerant is converged from the n liquid separating ports into 1 path and then flows out from the 1 total port, or the refrigerant flows into the liquid separator from the 1 total port and then is divided into n paths to flow out from the n liquid separating ports.

In some embodiments of this application, arrange the heat exchange tube outward and include the transition U pipe, outdoor heat exchanger still include with third connecting pipe and fourth connecting pipe that transition U managed both ends and connect, the other end of third connecting pipe is connected total port, the other end of fourth connecting pipe is connected the expansion valve.

In some embodiments of the present application, the outdoor heat exchanger includes a U-shaped copper pipe, and the inner row of heat exchange tubes, the outer row of heat exchange tubes, and the middle row of heat exchange tubes have the same number of rows of the U-shaped copper pipe.

In some embodiments of the present application, n is an integer, and 5 ≦ n ≦ 9.

In some embodiments of the present application, when n =7, the first connection pipe has 14, the flow branch has 14, and the flow total has 7; the 14 flow branch pipes form 7 groups of flow paths, and the 7 groups of flow paths are sequentially arranged into a first flow path, a second flow path, a third flow path, a fourth flow path, a fifth flow path, a sixth flow path and a seventh flow path along the flow direction of the refrigerant in the exhaust main pipe when the outdoor heat exchanger is a condenser; the first flow path, the fourth flow path and the seventh flow path are in flow agreement, the second flow path and the fifth flow path are in flow agreement, and the third flow path and the sixth flow path are in flow agreement.

In some embodiments of the present application, the outdoor heat exchanger further comprises a straight copper tube, a standard elbow, and a cross-tube; the straight copper tubes located in the first flow path, the second flow path, the fourth flow path, the fifth flow path, and the seventh flow path are connected by the standard elbows; the straight copper pipes positioned in the third flow path and the sixth flow path are connected with the cross pipe through the standard elbow.

In some embodiments of the present application, in the third flow path and the sixth flow path, two of the flow branches are converted into one of the flow manifolds at the three-way junction, and two nonadjacent straight copper pipes in the flow manifolds are connected by the crossover pipe.

In some embodiments of the present application, when the outdoor heat exchanger is used as a condenser, the main discharge pipe has a first end close to the refrigerant flowing direction and a second end far away from the refrigerant flowing direction, and the refrigerant flowing direction in the main discharge pipe is a first direction; the transition U pipe is positioned at one end, close to the second end, of the outer row of heat exchange pipes.

In some embodiments of the present application, the tee junction is a tee bend or a tee shunt tube.

The application has at least the following positive effects:

the utility model provides an air condensing units of single outdoor fan. The air conditioner outdoor unit of the single outdoor fan comprises a shell and a compressor, wherein an exhaust port is connected with an exhaust main pipe, and the outdoor fan is opposite to an outdoor air outlet; the outdoor heat exchanger comprises an inner row of heat exchange tubes arranged on the leeward side of the outdoor heat exchanger; the outer row of heat exchange tubes is arranged on the windward side of the outdoor heat exchanger and has n total flow paths, the inner row of heat exchange tubes is communicated with the outer row of heat exchange tubes through the middle row of heat exchange tubes, and the inner row of heat exchange tubes and the middle row of heat exchange tubes form 2n flow branches together; the first connecting pipes are communicated with the inner row heat exchange pipes and the exhaust main pipe, and 2n first connecting pipes are communicated with 2n flow branches in a one-to-one correspondence manner; the three-way switching part is connected with the flow main path and the flow branch paths, and the single three-way switching part is connected with the two flow branch paths and the flow main path. The utility model discloses a set up the outdoor heat exchanger's of three rows of heat exchange tubes air condensing units, effectively reduce outdoor heat exchanger's height, make single outdoor fan can cover outdoor heat exchanger.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to these drawings without creative efforts.

Fig. 1 is a view of an external appearance of an air conditioner outdoor unit having a single outdoor fan according to an embodiment of the present application;

FIG. 2 is a rear view of FIG. 1;

fig. 3 is a sectional view of an outdoor unit of an air conditioner having a single outdoor fan according to an embodiment of the present application;

fig. 4 is a schematic connection diagram of parts of an outdoor unit of an air conditioner with a single outdoor fan according to an embodiment of the present disclosure;

fig. 5 is a schematic connection diagram of parts of an outdoor unit of an air conditioner with a single outdoor fan according to an embodiment of the present application;

fig. 6 is a system schematic diagram of an outdoor unit of an air conditioner with a single outdoor fan according to an embodiment of the present application;

fig. 7 is a schematic connection diagram of a discharge main pipe, an outdoor heat exchanger, and a liquid separator of an outdoor unit of an air conditioner with a single outdoor fan according to an embodiment of the present disclosure;

fig. 8 is a schematic connection diagram of a discharge main pipe, an outdoor heat exchanger, and a liquid distributor of an outdoor unit of an air conditioner with a single outdoor fan according to an embodiment of the present application;

fig. 9 is a schematic view illustrating the flow directions of a discharge main, an outdoor heat exchanger and a liquid separator when the outdoor heat exchanger of an outdoor unit of an air conditioner having a single outdoor fan serves as a condenser according to an embodiment of the present invention;

fig. 10 is a schematic flow direction view illustrating a discharge main, an outdoor heat exchanger, and a liquid separator when an outdoor heat exchanger of an outdoor unit of an air conditioner having a single outdoor fan according to an embodiment of the present application is used as an evaporator;

in the above figures: 100. an air conditioner outdoor unit; 1. a housing; 11. a front plate; 12. a back panel; 13. an outdoor air inlet; 14. an outdoor air outlet; 2. a compressor; 23. a main exhaust pipe; 231. a first end; 232. a second end; 3. an expansion valve; 4. an outdoor fan; 5. an outdoor heat exchanger; 511. an inner row of heat exchange tubes; 512. an outer row of heat exchange tubes; 5121. a transition U-shaped pipe; 513. a middle row of heat exchange tubes; 521. a U-shaped copper tube; 522. spanning the tube; 531. a first connecting pipe; 532. a second connecting pipe; 533. a third connecting pipe; 534. a fourth connecting pipe; 541. a first flow path; 542. a second flow path; 543. a third flow path; 544. a fourth flow path; 545. a fifth flow path; 546. a sixth flow path; 547. a seventh flow path; 56. a three-way switching part; 571. a flow main path; 572. a flow branch; 6. a liquid separator; 7. an indoor heat exchanger; 8. and a four-way valve.

Detailed Description

The present invention is specifically described below by way of exemplary embodiments. It should be understood, however, that elements, structures and features of one embodiment may be beneficially incorporated in other embodiments without further recitation.

In the description of the present invention, it is to be understood that the terms "center", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", and the like, indicate orientations and positional relationships based on the orientations and positional relationships shown in the drawings, and are used only for convenience in describing and simplifying the description, but do not indicate or imply that the referenced devices or elements must have a particular orientation, be constructed and operated in a particular orientation, and thus, are not to be construed as limiting the present invention.

The terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first", "second", may explicitly or implicitly include one or more of that feature.

In the description of the present invention, it is to be noted that, unless otherwise explicitly specified or limited, the terms "mounted", "connected" and "connected" are to be interpreted broadly, e.g. as a fixed connection, a detachable connection or an integral connection; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meaning of the above terms in the present invention can be understood in specific cases to those skilled in the art.

The air conditioner includes a compressor, a condenser, an expansion valve, and an evaporator, and performs a refrigeration cycle or a heating cycle through the compressor, the condenser, the expansion valve, and the evaporator. The refrigeration cycle and the heating cycle comprise a compression process, a condensation process, an expansion process and an evaporation process, and cold or heat is provided for the indoor space through the heat absorption and release processes of the refrigerant, so that the temperature of the indoor space is adjusted.

The compressor compresses a refrigerant gas into a high-temperature and high-pressure state, discharges the compressed refrigerant gas, and the discharged refrigerant gas flows into the condenser. The condenser condenses the compressed high-temperature and high-pressure gaseous refrigerant into a liquid refrigerant, and heat is released to the surrounding environment through the condensation process.

The liquid refrigerant flowing out of the condenser enters an expansion valve, which expands the liquid refrigerant in a high-temperature and high-pressure state condensed in the condenser into a low-pressure liquid refrigerant. The low-pressure liquid refrigerant flowing out of the expansion valve enters the evaporator, absorbs heat when the liquid refrigerant flows through the evaporator and is evaporated into low-temperature and low-pressure refrigerant gas, and the refrigerant gas in the low-temperature and low-pressure state returns to the compressor. The evaporator can achieve a cooling effect by heat-exchanging with a material to be cooled using latent heat of evaporation of a refrigerant. The air conditioner can adjust the temperature of the indoor space throughout the cycle.

The air conditioner comprises an air conditioner indoor unit, an air conditioner outdoor unit and an expansion valve, wherein the air conditioner outdoor unit comprises a compressor and an outdoor heat exchanger, the air conditioner indoor unit comprises an indoor heat exchanger, and the expansion valve can be arranged in the air conditioner indoor unit or the air conditioner outdoor unit.

The indoor heat exchanger and the outdoor heat exchanger can be used as a condenser or an evaporator. When the indoor heat exchanger is used as a condenser, the air conditioner is used as a heater for a heating mode, and when the indoor heat exchanger is used as an evaporator, the air conditioner is used as a cooler for a cooling mode.

Hereinafter, embodiments of the present application will be described in detail with reference to fig. 1 to 10.

When the outdoor heat exchanger 5 is defined as a condenser, the flow direction of the refrigerant in the main discharge pipe 23 is a first direction; the U-shaped copper tubes in the inner row of heat exchange tubes 511, the outer row of heat exchange tubes 512 and the middle row of heat exchange tubes 513 are all uniformly distributed along the first direction.

As shown in the drawings, a direction in which a front plate 11 of the air-conditioning outdoor unit 100 is located in the drawings is defined as a front side of the air-conditioning outdoor unit 100, and a direction in which a rear plate 12 of the air-conditioning outdoor unit 100 is located is defined as a rear side of the air-conditioning outdoor unit 100.

The application provides an air condensing units 100 of single outdoor fan 4, the air condensing units 100 includes three rows of outdoor heat exchangers 5 and single outdoor fan 4, the single outdoor fan 4 can cover three rows of outdoor heat exchangers 5 with lower height and blow, the three rows of outdoor heat exchangers 5 have different flow paths under different windage through setting up flow branch 572 and flow main 571, thereby make the air condensing units 100 only set up a fan and can cover the outdoor heat exchanger 5 while guaranteeing the heat exchange efficiency of the outdoor heat exchanger 5, can reduce the space that the air condensing units 100 is used for placing the outdoor fan 4, thereby make the height of the air condensing units 100 reduce, make the air condensing units 100 can be installed in the lower outdoor installation space of height, make the installation demand of the air condensing units 100 further reduce.

The outdoor unit 100 includes a casing 1, and the casing 1 forms a main frame of the outdoor unit 100. Specifically, the outdoor unit 100 includes a front plate 11, a rear plate 12, left and right side plates, a top plate, and a bottom plate.

The casing 1 is provided with an outdoor air inlet 13 and an outdoor air outlet 14. The outdoor air outlet 14 is arranged on the front plate 11, the outdoor air inlet 13 is arranged on the back plate 12, and the back plate 12 and the front plate 11 are arranged oppositely. The outdoor air inlet 13 and the outdoor air outlet 14 are communicated to form an outdoor air duct.

The outdoor unit 100 further includes a compressor 2, the compressor 2 is disposed in the casing 1, the compressor 2 has a suction port and a discharge port, and the discharge port is connected to a discharge main 23. The liquid refrigerant absorbs heat when flowing through the evaporator and evaporates into low-temperature and low-pressure refrigerant gas, the refrigerant gas in a low-temperature and low-pressure state enters the exhaust port through the intake port, the compressor 2 compresses the refrigerant gas into a high-temperature and high-pressure state and discharges the compressed refrigerant gas, and the discharged refrigerant gas flows into the condenser through the main exhaust pipe 23.

And an expansion valve 3 which is provided in the casing 1 and connected between the condenser and the evaporator, and which expands the liquid refrigerant in a high-temperature and high-pressure state flowing out of the condenser into a low-pressure liquid refrigerant through the expansion valve 3 and then flows into the evaporator.

The expansion valve 3 may be provided in the air conditioning indoor unit or the air conditioning outdoor unit 100, and is within the scope of the present application.

The outdoor unit 100 further includes an outdoor fan 4, the outdoor fan 4 is disposed in the casing 1 and has one air outlet opposite to the outdoor air outlet 14, the outdoor fan 4 is disposed on one side of the outdoor heat exchanger 5 close to the front plate 11, the outdoor fan 4 rotates to form a low-pressure driving airflow, the low-pressure driving airflow enters the outdoor air duct in the casing 1 from the outdoor air inlet 13 of the back plate 12, and the low-pressure driving airflow is blown out to the outdoor environment from the outdoor air outlet 14 of the front plate 11 after exchanging heat with the outdoor heat exchanger 5.

The outdoor heat exchanger 5 is arranged in the casing 1 and connected between the compressor 2 and the expansion valve 3, and the outdoor heat exchanger 5 is arranged between the outdoor fan 4 and the back plate 12. Specifically, the outdoor fan 4 drives outdoor air to enter the casing 1 from an outdoor air inlet 13 at the back plate 12, and the outdoor air flows through the surface of the outdoor heat exchanger 5, the air flow performs heat exchange through the surface of the outdoor heat exchanger 5, and the air flow after heat exchange is blown out to the outdoor environment from an outdoor air outlet 14 of the front plate 11. Outdoor fan 4 can cover outdoor heat exchanger 5, and in this application, outdoor heat exchanger 5 adopts three rows of heat exchange tubes, and three rows of heat exchange tubes of outdoor heat exchanger 5 are highly lower, and single outdoor fan 4 can cover outdoor heat exchanger 5.

The outdoor heat exchanger 5 has three rows of heat exchange tubes, which include an inner row of heat exchange tubes 511, an outer row of heat exchange tubes 512, and a middle row of heat exchange tubes 513.

The inner row of heat exchange tubes 511 are arranged on the leeward side of the outdoor heat exchanger 5, that is, the inner row of heat exchange tubes 511 are far away from the outdoor air inlet 13 of the back plate 12, and the wind resistance of outdoor wind entering from the outdoor air inlet 13 to the inner row of heat exchange tubes 511 is large.

The outer heat exchange tube 512 is arranged on the windward side of the outdoor heat exchanger 5, that is, the outer heat exchange tube 512 is close to the outdoor air inlet 13 of the back plate 12, outdoor air entering from the outdoor air inlet 13 firstly passes through the outer heat exchange tube 512, and the air resistance at the outer heat exchange tube 512 is small. The outer heat exchange tubes 512 have n flow manifolds 571 in total, and the refrigerant flows in the flow manifolds 571. When the outdoor heat exchanger 5 is used as an evaporator, the refrigerant flowing out of the liquid separator 6 is divided into n flow main paths 571 to flow, and since the dryness of the refrigerant flowing out of the expansion valve 3 is low at this time, the refrigerant is divided into n flow main paths 571 to flow, so that the heat exchange effect can be improved.

The middle row of heat exchange tubes 513 are connected between the inner row of heat exchange tubes 511 and the outer row of heat exchange tubes 512, and the inner row of heat exchange tubes 511 are communicated with the outer row of heat exchange tubes 512 through the middle row of heat exchange tubes 513. Outdoor air entering from the outdoor air inlet 13 at the back plate 12 firstly passes through the outer row of heat exchange tubes 512, then passes through the middle row of heat exchange tubes 513 and then passes through the inner row of heat exchange tubes 511, and the middle row of heat exchange tubes 513 are blocked by the outer row of heat exchange tubes 512, so that the wind resistance of the outdoor air at the middle row of heat exchange tubes 513 is also larger. The inner row heat exchange tubes 511 and the middle row heat exchange tubes 513 together form 2n flow branches 572, and compared with the n flow main paths 571 and 2n flow branches 572 of the outer row heat exchange tubes 512, the heat exchange efficiency of the inner row heat exchange tubes 511 and the middle row heat exchange tubes 513 with large wind resistance can be enhanced, so that the overall heat exchange efficiency of the outdoor heat exchanger 5 is high.

The outdoor heat exchanger 5 further includes a first connection pipe 531, the first connection pipe 531 communicates the inner heat exchanging pipe 511 and the exhaust main pipe 23, the first connection pipe 531 has 2n, and the 2n first connection pipes 531 are in one-to-one correspondence with the 2n flow branches 572.

Specifically, when the outdoor heat exchanger 5 is used as a condenser, the refrigerating machine flowing out of the compressor 2 flows to the discharge main pipe 23 through the discharge port, and then separately flows into a plurality of flow paths through the first connection pipe 531, since the first connection pipe 531 has 2n, and the first connection pipe 531 communicates with the 2n flow branches 572 in one-to-one correspondence, the refrigerant is changed from one of the discharge main pipes 23 to 2n through the first connection pipe 531, and 2n inner discharge ports connected to the first connection pipe 531 are provided on the inner discharge heat exchange pipe 511, so that the refrigerant in the first connection pipe 531 flows into the 2n flow branches 572 through the inner discharge ports.

The outdoor heat exchanger 5 further includes a three-way adapter 56, which is connected between the middle row heat exchange tube 513 and the outer row heat exchange tube 512, and is used for connecting the flow main 571 and the flow branch 572. A single three-way junction 56 connects two flow branches 572 and one flow main 571. The refrigerant flows into the inner row of heat exchange tubes 511, the middle row of heat exchange tubes 513 and the outer row of heat exchange tubes 512 and flows along the flow branch 572 and the flow main 571, and the flow branch 572 and the flow main 571 are converted between the three-way conversion parts 56.

Specifically, the three-way connection has three joints, two of which connect the two flow branches 572 and the other of which connects the flow main 571.

When the outdoor heat exchanger 5 serves as a condenser, the refrigerant flows from the discharge port of the compressor 2 to the discharge header pipe, flows into the flow branch 572 formed by the inner heat exchange tubes 511 and the middle heat exchange tubes 513 through the first connection pipe 531, and flows into the flow header 571 through the three-way junction 56. Because the refrigerant flow velocity reduces after getting into the saturation region in flowing branch 572, join through tee bend switching portion 56 and become all the way, can reduce the flow path of refrigerant, promote the velocity of flow of refrigerant to this heat exchange efficiency who improves the refrigerant, thereby make outdoor heat exchanger 5's whole heat exchange efficiency promote, make the heat exchange efficiency increase of three rows of heat exchange tubes.

When the outdoor heat exchanger 5 is used as a condenser, the high-temperature gaseous refrigerant flowing out of the compressor 2 has a high flow rate, and flows into the 2n flow branches 572 to be branched, so that the pressure loss of the refrigerant can be reduced, and the heat exchange loss is reduced.

When the outdoor heat exchanger 5 is used as an evaporator, the refrigerant flows out of the expansion valve 3 to the outdoor heat exchanger 5 and sequentially flows through the outer heat exchange tube 512, the middle heat exchange tube 513 and the inner heat exchange tube 511, when the refrigerant flows into the middle heat exchange tube 513, the dryness of the refrigerant gradually increases, the flow rate of the refrigerant also increases, the refrigerant flows into the 2n flow branches 572 and the 2n flow branches 572 at the three-way conversion part, so that the pressure loss of the refrigerant can be reduced, the heat exchange efficiency of the outdoor heat exchanger 5 is improved, when the refrigerant flows to the inner heat exchanger, most of the refrigerant is converted into gaseous refrigerant, the flow rate of the gaseous refrigerant is higher, and the pressure loss of the refrigerant can be reduced by the 2n flow branches 572.

In the prior art, when the required cooling capacity is large, the air conditioner outdoor unit 100 generally has two rows of higher heat exchangers to increase the heat exchange area, and because the heights of the two rows of heat exchangers are high, the airflow introduced by a single fan cannot meet the surface of the two rows of higher heat exchangers, which may result in the reduction of the heat exchange efficiency of the two rows of higher heat exchangers.

Compared with the prior art, the outdoor heat exchanger 5 is a three-row heat exchanger, the heat exchange area of the outdoor heat exchanger 5 is increased, the two-row heat exchanger is compared, the height is lower, and the airflow introduced by the single fan can cover the three-row heat exchanger with the lower height. It should be noted that, in the three-row heat exchanger of the present application, n flow manifolds 571 are arranged in the outer-row heat exchanger close to the outdoor air inlet 13, and 2n flow branches 572 are arranged in the inner-row heat exchanger and the middle-row heat exchange tube 513 away from the outdoor air inlet 13, so that different refrigerant flow paths can be set under different windage resistances, and the heat exchange efficiency of the three-row heat exchanger can be enhanced. The three rows of heat exchangers can be covered by the air supply of a single fan, and the heat exchange efficiency is high.

In the prior art, for the situation that the two rows of heat exchangers are high and cannot cover the air supply through the single outdoor fan 4, some air conditioner outdoor units 100 are internally provided with two axial flow fans which are arranged up and down to increase the air supply area of the axial flow fans, so that the high two rows of heat exchangers can also be covered by the introduced air flow of the two axial flow fans, but the air conditioner outdoor units 100 provided with the two axial flow fans which are arranged up and down are high, sometimes the installation space for installing the outdoor environment of the air conditioner outdoor unit 100 is low in height, and the air conditioner outdoor units 100 provided with the two axial flow fans cannot be installed in the installation space with the low height.

Compared with the prior art, the three rows of heat exchangers of the application are low in height, and only one axial flow fan is needed to cover the three rows of heat exchangers, so that the air conditioner outdoor unit 100 of the application is low in height and can be installed in an installation space in a low-height outdoor environment, the situation that the installation space of the outdoor environment is blocked by the height is reduced, the installation is more convenient, materials needed by the casing 1 of the air conditioner outdoor unit 100 are reduced, and the production cost of the air conditioner outdoor unit 100 is reduced.

In some embodiments of the present application, the outdoor heat exchanger 5 further includes a second connection pipe 532, the second connection pipe 532 has n, the outdoor unit 100 further includes a liquid separator 6, and the second connection pipe 532 is connected between the liquid separator 6 and the outer row of heat exchange pipes 512; the liquid separator 6 has n liquid separating ports and 1 total port, and the n liquid separating ports are in one-to-one correspondence with the n second connecting pipes 532.

When the outdoor heat exchanger 5 is used as a condenser, the refrigerant enters the main exhaust pipe 23 through the exhaust port of the compressor 2, the first connecting pipe 531 is connected between the main exhaust pipe 23 and the inner row heat exchanger, the refrigerant in the main exhaust pipe 23 is divided into 2n paths through 2n first connecting pipes 531, the 2n paths flow into 2n flow branches 572, the 2n flow branches 572 are positioned in the inner row heat exchange pipe 511 and the middle row heat exchange pipe 513, are converted into n flow main paths 571 through a three-way conversion part connected between the middle row heat exchange pipe 513 and the outer row heat exchange pipe 512, flow into n second connecting pipes 532 through the flow main paths 571, flow into the liquid separator 6 from n liquid separating ports, and flow out from 1 main port after being collected into 1 path. The main refrigerant flowing out of the main port flows into the expansion valve 3, and the n refrigerant paths flowing out of the second connection pipe 532 are collected in the liquid separator 6, so that the temperatures of the respective refrigerant paths can be integrated to prevent the temperature deviation of the refrigerant.

When the outdoor heat exchanger 5 is used as an evaporator, the refrigerant flows from the expansion valve 3 to the main port of the liquid separator 6, and is divided into n paths by the liquid separator 6, and flows out from the n liquid separating ports to the n second connecting pipes 532, the liquid separator 6 performs a uniform distribution function of the refrigerant, flows into the flow main 571 of the outer heat exchange tube 512 through the second connecting pipes 532, flows into 2n paths through the three-way switching part, flows into the 2n flow branches 572, is collected into the exhaust main through the 2n first connecting pipes 531 connected to the flow branches 572, and enters the inside of the compressor 2 through the exhaust main. At this time, the refrigerant flowing out of the expansion valve 3 is divided into n paths by the liquid separator 6 and flows into the flow main 571 of the outward heat exchange tube 512, and since the refrigerant flowing out of the expansion valve 3 has a low dryness and a low flow rate, the refrigerant is divided into n paths, thereby improving the heat exchange effect of the refrigerant.

In some embodiments of the present application, the outer row of heat exchange tubes 512 includes a transition U-shaped tube 5121, the outdoor heat exchanger 5 further includes a third connection tube 533 and a fourth connection tube 534 connected to both ends of the transition U-shaped tube 5121, the other end of the third connection tube 533 is connected to the main port, and the other end of the fourth connection tube 534 is connected to the expansion valve 3.

When the outdoor heat exchanger 5 is used as a condenser, the refrigerant flows out of the exhaust main pipe 23 of the compressor 2 to the exhaust main pipe 23, sequentially flows through the inner row heat exchange pipe 511, the middle row heat exchange pipe 513 and the outer row heat exchange pipe 512, flows to the liquid separator 6 through the second connection pipe 532, is collected into one path through the liquid separator 6, flows to the transition U pipe 5121 through the third connection pipe 533, and flows into the expansion valve 3 through the fourth connection pipe 534.

When the outdoor heat exchanger 5 is used as an evaporator, the refrigerant flows from the expansion valve 3 to the fourth connection pipe 534, then flows from the fourth connection pipe 534 to the transition U pipe 5121, then flows from the third connection pipe 533 to the liquid separator 6, is divided into n paths in the liquid separator 6, and flows into the flow main path 571 of the outer heat exchange pipe 512, and the flow main path 571 is converted into the flow branch 572 in the three-way conversion portion, and flows to the exhaust manifold through the first connection pipe 531, and finally flows into the compressor 2.

In some embodiments of the present application, the outdoor heat exchanger 5 includes U-shaped copper tubes 521, and the inner row of heat exchange tubes 511, the outer row of heat exchange tubes 512, and the middle row of heat exchange tubes 513 have the same number of rows of U-shaped copper tubes 521, which is beneficial to being arranged according to the characteristics of a wind field, so that the efficiency of the outdoor heat exchanger 5 is increased.

In some embodiments, n =7, the inner row of heat exchange tubes 511, the outer row of heat exchange tubes 512, and the middle row of heat exchange tubes 513 have the same 19 rows of U-shaped copper tubes 521. In other embodiments, 18U-shaped copper pipes 521 or 17U-shaped copper pipes 521 or 20U-shaped copper pipes 521 may also be provided to meet the heat exchange requirement of the outdoor heat exchanger 5.

In some embodiments of the present application, n is an integer, and 5 ≦ n ≦ 9,n may be 5 or 6 or 7 or 8 or 9. At this time, the height of the outdoor heat exchanger 5 is low, the outdoor heat exchanger can be covered by a single outdoor fan 4, a good heat exchange effect can be achieved, and the value of n can be selected according to the pressure drop requirements of each flow branch 572 and the flow main 571.

In some embodiments of the present application, when n =7, there are 14 first connecting pipes 531, 14 flow branches 572, and 7 flow manifolds 571.

The 14 flow branches 572 form 7 sets of flow paths, and the 7 sets of flow paths are sequentially arranged as a first flow path 541, a second flow path 542, a third flow path 543, a fourth flow path 544, a fifth flow path 545, a sixth flow path 546 and a seventh flow path 547 in the flow direction of the discharge main 23 when the outdoor evaporator is a condenser, wherein the first flow path 541, the fourth flow path 544 and the seventh flow path 547 have the same flow pattern, the second flow path 542 and the fifth flow path 545 have the same flow pattern, and the third flow path 546 and the sixth flow path 546 have the same flow pattern, so that the refrigerant in the outdoor heat exchanger 5 can flow among the inner row of heat exchange tubes 511, the middle row of heat exchange tubes 513 and the outer row of heat exchange tubes 512 in order, thereby enabling the refrigerant to maintain stable heat exchange efficiency and achieving effective heat exchange of the outdoor heat exchanger 5 with the surface-flowing gas flow.

In some embodiments of the present application, the outdoor heat exchanger 5 further includes straight copper tubes between which refrigerant flows through standard bends, and a cross-over tube 522, the straight copper tubes located in the first flow path 541, the second flow path 542, the fourth flow path 544, the fifth flow path 545, and the seventh flow path 547 being connected through standard bends.

The straight copper tubes in the third flow path 543 and the sixth flow path 546 are connected by standard elbows and cross tubes 522, with the numbered elbows and cross tubes 522 providing refrigerant flow between the straight copper tubes.

In some embodiments of the present application, in the third flow path 543 and the sixth flow path 546, the two flow branches 572 are converted into one flow main 571 at the three-way junction 56, two non-adjacent straight copper tubes in the flow main 571 are connected by the cross tube 522, and the cross tube 522 realizes communication between the two non-adjacent straight copper tubes, so that the flow paths of the refrigerant are more diversified.

In embodiments of the present application, the first flow path 541, the second flow path 542, the third flow path 543, the fourth flow path 544, the fifth flow path 545, the sixth flow path 546 and the seventh flow path 547 each have two flow branches 572 and one flow summation 571.

The first flow path 541 has two flow branches 572, wherein one flow branch 572 distant from the transition U tube 5121 passes through two straight copper tubes of the inner heat exchange tube 511 and four straight copper tubes of the middle heat exchange tube 513, and one flow branch 572 near the transition U tube 5121 passes through four straight copper tubes of the inner heat exchange tube 511 and two straight copper tubes of the middle heat exchange tube 513, and the two flow branches 572 communicate with one flow main 571 at a three-way conversion portion. One flow main 571 in the first flow path 541 flows through four straight copper tubes of the outer heat exchange tube 512 and is connected with the liquid separator 6 through the second connecting tube 532.

The first, fourth and seventh flow paths 541, 544 and 547 flow in the same manner.

The second flow path 542 has two flow branches 572, one of the flow branches 572 distant from the transition U tube 5121 passes through four straight copper tubes passing through the inner heat exchange tube 511 and two straight copper tubes passing through the middle heat exchange tube 513, the other flow branch 572 near the transition U tube 5121 passes through two straight copper tubes passing through the inner heat exchange tube 511 and four straight copper tubes passing through the middle heat exchange tube 513, and the two flow branches 572 communicate with one flow main 571 at a three-way conversion portion. One flow main 571 in the second flow path 542 flows through four straight copper tubes of the outer heat exchange tube 512, and is connected with the liquid separator 6 through the second connecting tube 532.

The second flow path 542 and the fifth flow path 545 flow in the same manner.

The third flow path 543 has two flow branches 572, one of the flow branches 572 far from the transition U tube 5121 flows through two straight copper tubes of the inner heat exchange tube 511 and two straight copper tubes of the middle heat exchange tube 513, the other flow branch 572 near the transition U tube 5121 flows through two straight copper tubes of the inner heat exchange tube 511 and two straight copper tubes of the middle heat exchange tube 513, and the two flow branches 572 communicate with one flow main 571 at the three-way conversion portion. One flow main 571 in the third flow path 543 flows through six straight copper tubes of the outer heat exchange tube 512, then flows through two straight copper tubes of the outer heat exchange tube 512 via the cross tube 522, and is connected with the liquid separator 6 via the second connection tube 532.

In some embodiments of the present application, when the outdoor heat exchanger 5 is used as a condenser, the refrigerant flows in the discharge main 23, the discharge main 23 has a first end 231 close to the refrigerant inflow direction and a second end 232 far from the refrigerant inflow direction, and the refrigerant flow direction is the first direction when the outdoor heat exchanger 5 is used as a condenser.

The U-shaped copper tubes in the inner row of heat exchange tubes 511, the outer row of heat exchange tubes 512 and the middle row of heat exchange tubes 513 are all uniformly arranged along a first direction, and the first connecting tube 531 is perpendicular to the flow direction of the refrigerant in the main exhaust tube 23.

The transition U pipe 5121 is positioned at one end of the outer heat exchange pipe 512 close to the second end 232 of the exhaust main pipe 23, and can meet the supercooling degree when the outdoor heat exchanger 5 is used as a condenser and the frosting requirement when an evaporator is used.

When the outdoor heat exchanger 5 is a condenser, the transition U tube 5121 is used for supercooling the refrigerant, so that the heat exchange amount of the refrigerant in the outdoor heat exchanger 5 can be increased, and the effect of the outdoor heat exchanger 5 when used as a condenser can be improved.

When the outdoor heat exchanger 5 is used as an evaporator, the refrigerant flowing out of the expansion valve 3 passes through the transition U-shaped pipe 5121 and then flows into the liquid separator 6, and the transition U-shaped pipe 5121 can prevent the pressure loss of the refrigerant from being too large.

In some embodiments of the present application, the three-way junction 56 is a three-way elbow or a three-way shunt tube. The three-way elbow and the three-way shunt tube can achieve the communication effect of the two flow branches 572 and the flow main 571, so that the three-way switching part 56 has various selection schemes, and can be selected according to the actual requirements of the outdoor unit 100 of the air conditioner.

When the outdoor unit 100 of the air conditioner is in the cooling mode, the gaseous refrigerant passes through the main air inlet pipe from the air outlet, and then passes through the branch air inlet pipe to enter the inner heat exchange tubes 511;

the outlet pipe is positioned at the lowest end of the heat exchanger outer row, so that the supercooling degree of the condenser and the frosting requirement of the evaporator are ensured.

The above description is only for the specific embodiments of the present invention, but the protection scope of the present invention is not limited thereto, and any person skilled in the art can easily think of the changes or substitutions within the technical scope of the present invention, and all should be covered within the protection scope of the present invention. Therefore, the protection scope of the present invention shall be subject to the protection scope of the claims.

Claims (10)

1. An outdoor unit of an air conditioner with a single outdoor fan, comprising:

a casing provided with an outdoor air inlet and an outdoor air outlet; the casing comprises a back plate opposite to the outdoor air outlet;

a compressor, which is arranged in the shell and is provided with an air suction port and an air exhaust port; an exhaust main pipe is connected to the exhaust port;

an expansion valve provided in the casing;

the outdoor fan is arranged in the shell and provided with one outdoor fan, and the outdoor fan is arranged opposite to the outdoor air outlet;

the outdoor heat exchanger is arranged in the shell and connected between the compressor and the expansion valve, and the outdoor heat exchanger is arranged between the outdoor fan and the rear back plate;

the outdoor fan drives outdoor air to enter the shell from an outdoor air inlet, flow through the outdoor heat exchanger and flow out from the outdoor air outlet;

the outdoor heat exchanger includes:

the inner row of heat exchange tubes are arranged on the leeward side of the outdoor heat exchanger;

the outer heat exchange tubes are arranged on the windward side of the outdoor heat exchanger and have n total flow main paths;

the inner row of heat exchange tubes are communicated with the outer row of heat exchange tubes through the middle row of heat exchange tubes, and the inner row of heat exchange tubes and the middle row of heat exchange tubes jointly form 2n flow branches;

the first connecting pipe is communicated with the inner row of heat exchange pipes and the exhaust main pipe, the number of the first connecting pipes is 2n, and the 2n first connecting pipes are communicated with the 2n flow branches in a one-to-one correspondence manner;

a three-way junction portion connecting the flow main and the flow branches, a single three-way junction portion connecting two of the flow branches and one of the flow main;

and the refrigerant flows into the inner row of heat exchange tubes, the middle row of heat exchange tubes and the outer row of heat exchange tubes and flows along the flow branch and the flow main path, and the flow branch and the flow main path are converted between the three-way switching parts.

2. The outdoor unit of an air conditioner with a single outdoor fan as claimed in claim 1, wherein the outdoor heat exchanger further comprises a second connection pipe, the second connection pipe having n number;

the air conditioner outdoor unit further comprises a liquid distributor, and the second connecting pipe is connected between the liquid distributor and the outer discharge heat exchange pipe; the liquid separator is provided with n liquid separating ports and 1 total port, and the n liquid separating ports are communicated with the n second connecting pipes in a one-to-one correspondence manner;

and the refrigerant is converged from the n liquid separating ports into 1 path and then flows out from the 1 total port, or the refrigerant flows into the liquid separator from the 1 total port and then is divided into n paths to flow out from the n liquid separating ports.

3. The outdoor unit of claim 2, wherein the outer row of heat exchange tubes comprises a transition U-shaped tube, the outdoor heat exchanger further comprises a third connection tube and a fourth connection tube connected to both ends of the transition U-shaped tube, the other end of the third connection tube is connected to the main port, and the other end of the fourth connection tube is connected to the expansion valve.

4. The outdoor unit of an air conditioner with a single outdoor fan as claimed in claim 1, wherein the outdoor heat exchanger comprises U-shaped copper tubes, and the inner row heat exchange tubes, the outer row heat exchange tubes and the middle row heat exchange tubes have the same number of rows of the U-shaped copper tubes.

5. The outdoor unit of claim 1, wherein n is an integer of 5. Ltoreq. N.ltoreq.9.

6. The outdoor unit of an air conditioner with a single outdoor fan as claimed in claim 1, wherein when n =7, the first connection pipe has 14, the flow branch has 14, and the flow total has 7;

the 14 flow branch pipes form 7 groups of flow paths, and the 7 groups of flow paths are sequentially arranged into a first flow path, a second flow path, a third flow path, a fourth flow path, a fifth flow path, a sixth flow path and a seventh flow path along the flow direction of the refrigerant in the exhaust main pipe when the outdoor heat exchanger is a condenser; the first flow path, the fourth flow path and the seventh flow path are in flow agreement, the second flow path and the fifth flow path are in flow agreement, and the third flow path and the sixth flow path are in flow agreement.

7. The outdoor unit of claim 6, wherein the outdoor heat exchanger further comprises a straight copper pipe, a standard elbow, and a cross pipe;

the straight copper tubes located in the first flow path, the second flow path, the fourth flow path, the fifth flow path, and the seventh flow path are connected by the standard elbows;

the straight copper pipes positioned in the third flow path and the sixth flow path are connected with the cross pipe through the standard elbow.

8. The outdoor unit of claim 7, wherein, in the third and sixth flow paths, the two flow branches are converted into one flow trunk at the three-way junction, and two non-adjacent straight copper pipes in the flow trunk are connected by the crossover pipe.

9. The outdoor unit of claim 3, wherein when the outdoor heat exchanger is used as a condenser, the main discharge pipe has a first end close to a refrigerant inflow direction and a second end far from the refrigerant inflow direction, and the refrigerant flows in the main discharge pipe in the first direction;

the transition U-shaped pipe is positioned at one end of the outer row of heat exchange pipes close to the second end.

10. The outdoor unit of claim 1, wherein the three-way junction is a three-way elbow or a three-way bypass pipe.

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