CN117168024A - Reversing valve and air conditioner - Google Patents

Abstract

The application discloses a reversing valve and an air conditioner, wherein the air conditioner comprises a reversing valve, and the reversing valve comprises a first opening, a second opening, a third opening, a fourth opening and a fifth opening; the outlet and the inlet of the compressor are respectively connected with the first opening and the second opening; the indoor unit heat exchanger, one end of the indoor unit heat exchanger is connected with the third opening; the outdoor unit heat exchanger comprises a first outdoor heat exchanger and a second outdoor heat exchanger, wherein the first end of the first outdoor heat exchanger is connected with the fourth opening, the first end of the second outdoor heat exchanger is connected with the fifth opening, the second end of the first outdoor heat exchanger and the second end of the second outdoor heat exchanger are connected with the second end of the indoor unit heat exchanger, and the fifth opening is blocked during refrigeration. The air conditioner can shunt the refrigerant to more evaporation pipelines when the air conditioner is used for heating without affecting the refrigerating work of the air conditioner, reduces the flow rate of the refrigerant, reduces the pressure loss, improves the heating quantity and reduces the risk of frosting on an outdoor unit.

Description

Reversing valve and air conditioner

Technical Field

The application relates to the field of air conditioners, in particular to a reversing valve and an air conditioner.

Background

When the air conditioner is used for refrigerating, the compressor compresses the gaseous refrigerant into high-temperature and high-pressure gas, the gas is sent to the heat exchanger of the outdoor unit for cooling after passing through the four-way reversing valve, the cooled gas is changed into medium-temperature and high-pressure liquid refrigerant, the medium-temperature and high-pressure liquid refrigerant enters the drying bottle for filtering and dehumidifying, the medium-temperature and liquid refrigerant is throttled by the throttling part, the low-temperature and low-pressure gas-liquid mixture is gasified after absorbing heat in the air by the heat exchanger of the indoor unit, the gas is changed into gas, and then the gas returns to the compressor for continuous compression and continuous circulation for refrigerating.

When the air conditioner is used for heating, the flowing direction of the refrigerant in the indoor unit heat exchanger and the outdoor unit heat exchanger is opposite to that of the refrigerant during refrigeration through the four-way reversing valve, the gaseous refrigerant is compressed into a high-temperature high-pressure gaseous state by the compressor, the gaseous refrigerant is sent to the indoor unit heat exchanger for cooling and radiating after passing through the four-way reversing valve, the cooled liquid refrigerant becomes a liquid refrigerant with medium temperature and high pressure, the liquid refrigerant enters the drying bottle for filtering and dehumidifying, the liquid refrigerant with medium temperature and liquid refrigerant with low temperature and low pressure is throttled by the throttling part, the liquid refrigerant absorbs heat in the air through the outdoor unit heat exchanger, and then the liquid refrigerant returns to the compressor for continuous compression, and the liquid refrigerant is continuously circulated for heating.

Through the technical scheme, the inventor considers that the outdoor unit may be frosted when the air conditioner heats in winter, and the heating work of the air conditioner is affected; the inventor also considers that the flow path of the refrigerant in the heat exchanger is fixed when the air conditioner refrigerates and heats, and the state difference of the pressure and the like of the refrigerant in the same heat exchanger is large when the refrigerant refrigerates and heats, and the heat exchange effect needs to be improved.

Disclosure of Invention

The present application aims to solve at least one of the technical problems existing in the prior art. To this end, an object of the present application is to propose a reversing valve and an air conditioner; the air conditioner provided by the application ensures that the flow paths of the refrigerant in the heat exchanger of the outdoor unit are different when the air conditioner is used for refrigerating and heating by matching with the flow mode of the refrigerant in the heat exchanger of the outdoor unit designed by the reversing valve, so that the refrigerant can flow through more evaporation pipelines when the air conditioner is used for heating on the premise of not influencing the normal work when the air conditioner is used for refrigerating, the heating quantity is improved, and the possibility of frosting on the outdoor unit is reduced.

According to an embodiment of the present application, a reversing valve includes:

the valve body is internally provided with a first opening, a second opening, a third opening, a fourth opening and a fifth opening, the first opening is connected with an outlet of the compressor, the second opening is connected with an inlet of the compressor, the third opening is connected with the indoor unit heat exchanger, the fourth opening is connected with the first outdoor heat exchanger, and the fifth opening is connected with the second outdoor heat exchanger;

a valve spool slidably disposed within the chamber, the valve spool having a first position and a second position;

when the valve core is in a first position, the second opening is communicated with the third opening, the first opening is communicated with the fourth opening, and the valve core seals the fifth opening;

when the spool is in the second position, the first opening communicates with the third opening, and the second opening communicates with the fourth opening and the fifth opening.

Through the technical scheme, the air conditioner comprising the reversing valve enables the refrigerant to flow through more evaporation pipelines, improves heating quantity, and reduces the possibility of frosting of the outdoor unit.

According to one embodiment of the present application, the fourth opening is configured in plural, the first outdoor heat exchanger is also plural, and each of the fourth openings is in communication with the corresponding first outdoor heat exchanger;

when the valve core is in a first position, the first opening is communicated with a plurality of fourth openings at the same time, and when the valve core is in a second position, the second opening is communicated with a plurality of fourth openings at the same time.

Through the technical scheme, the air conditioner comprising the reversing valve can be connected with more first outdoor heat exchangers through the fourth openings, so that when the air conditioner is used for heating, a refrigerant can flow through more evaporation pipelines, the heating quantity is improved, and the possibility of frosting on the heat exchangers of the outdoor units is reduced.

An air conditioner according to an embodiment of the present application includes:

the reversing valve provided by the application;

a compressor, an outlet of the compressor being connected to the first opening; the inlet of the compressor is connected with the second opening;

the first end of the indoor unit heat exchanger is connected with the third opening;

the outdoor unit heat exchanger comprises a first outdoor heat exchanger and a second outdoor heat exchanger, wherein the first end of the first outdoor heat exchanger is connected with the fourth opening, the first end of the second outdoor heat exchanger is connected with the fifth opening, and the second end of the first outdoor heat exchanger and the second end of the second outdoor heat exchanger are connected with the second end of the indoor unit heat exchanger.

Through the technical scheme, on the premise that normal work of the air conditioner during refrigeration is not affected, when the air conditioner heats, the refrigerant can flow through the first outdoor heat exchanger and the second outdoor heat exchanger, so that the heating quantity is improved, and the possibility of frosting of the outdoor unit is reduced.

According to an embodiment of the present application, the fourth opening is configured in plurality, and the first outdoor heat exchanger is also in plurality, and each of the fourth openings is in communication with the first end of the corresponding first outdoor heat exchanger.

Through the technical scheme, when the air conditioner heats, the heating quantity is improved through more evaporation pipelines, and the possibility of frosting of the outdoor unit is further reduced.

Further, each of the first outdoor heat exchangers includes: the first ends of the plurality of first heat exchange tube groups in each first outdoor heat exchanger are connected with the corresponding fourth openings, and the second ends of the plurality of first heat exchange tube groups in each first outdoor heat exchanger are connected with the second ends of the indoor unit heat exchangers.

Through the technical scheme, each first outdoor heat exchanger comprises a plurality of first heat exchange tube groups, the number of evaporation pipelines through which a refrigerant flows when the air conditioner heats is further increased, and the more the number of evaporation pipelines through which the refrigerant flows, the higher the heating quantity, and the lower the possibility of frosting of the outdoor unit.

Further, the second outdoor heat exchanger includes: and the first ends of the second heat exchange tube groups are connected with the fifth opening, and the second ends of the second heat exchange pipelines are connected with the second ends of the indoor unit heat exchangers.

Through the technical scheme, the evaporation pipeline through which the refrigerant flows when the air conditioner heats comprises the plurality of first heat exchange pipe groups and the plurality of second heat exchange pipe groups, so that the number of the evaporation pipeline is further increased, the heating quantity is further improved, and the possibility of frosting of the outdoor unit is reduced.

Further, the number of the second heat exchange tube groups is the same as the number of the first outdoor heat exchangers, and the second ends of the plurality of the first heat exchange tube groups of each of the first outdoor heat exchangers are connected to the second ends of the corresponding second heat exchange tubes;

the second outdoor heat exchanger further includes: and the first end of the third heat exchange tube group is connected with the fifth opening, and the second end of the third heat exchange tube group is connected with the second end of the indoor unit heat exchanger.

Through the technical scheme, the evaporating pipelines through which the refrigerant flows when the air conditioner heats comprise the plurality of first heat exchange tube groups, the plurality of second heat exchange tube groups and the third heat exchange tube groups, so that the number of the evaporating pipelines is further increased, the heating quantity is further improved, and the possibility of frosting of the outdoor unit is reduced.

Further, the second ends of the plurality of the first heat exchange tube groups of each of the first outdoor heat exchangers are also connected to the second ends of the third heat exchange tube groups.

Further, the second ends of the plurality of first heat exchange tube groups of each of the first outdoor heat exchangers are connected to the second ends of the corresponding second heat exchange tube groups and the second ends of the third heat exchange tube groups, respectively, through a first main pipe and first and second branches connected to the first main pipe;

the first end of the first main pipeline is connected with the second ends of the plurality of first heat exchange tube groups of the first outdoor heat exchanger, the second end of the first main pipeline is connected with the first end of the first branch pipeline and the first end of the second branch pipeline, the second end of the first branch pipeline is connected with the second end of the corresponding second heat exchange tube group, the second end of the second branch pipeline is connected with the second end of the third heat exchange tube group, and a one-way valve which is only conducted from the second end of the second branch pipeline to the first end of the second branch pipeline is arranged on the second branch pipeline.

Through the technical scheme, the plurality of heat exchange tube groups in the outdoor unit are reasonably utilized, and the air conditioner is split into the plurality of first heat exchange tube groups at most during refrigeration, so that the number of split-flow pipelines is small, the pressure loss of the system is reduced, the flow velocity of the refrigerant is increased, and the supercooling degree is increased.

Further, a throttle valve is provided between the second end of the third heat exchange tube group and the second end of the indoor unit heat exchanger.

Additional aspects and advantages of the application will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of the application.

Drawings

The foregoing and/or additional aspects and advantages of the application will become apparent and may be better understood from the following description of embodiments taken in conjunction with the accompanying drawings in which:

fig. 1 is a schematic structural diagram of a reversing valve according to an embodiment of the present application.

Fig. 2 is a schematic diagram of a state of an air conditioner during cooling according to an embodiment of the present application.

Fig. 3 is a schematic diagram of a state of an air conditioner during heating according to an embodiment of the present application.

Reference numerals: 1. a reversing valve; 11. a valve body; 12. a valve core; D. a first opening; s, a second opening; E. a third opening; c1, a fourth opening; c2, a fifth opening; 2. a compressor; 3. an indoor unit heat exchanger; 4. an outdoor unit heat exchanger; 41. a first outdoor heat exchanger; 411. a first heat exchange tube group; 412. a first main pipe; 413. a first branch; 414. a second branch; 42. a second outdoor heat exchanger; 421. a second heat exchange tube group; 422. a third heat exchange tube group; 43. a one-way valve; 5. a throttle valve.

Detailed Description

Embodiments of the present application are described in detail below, examples of which are illustrated in the accompanying drawings, wherein like or similar reference numerals refer to like or similar elements or elements having like or similar functions throughout. The embodiments described below by referring to the drawings are illustrative only and are not to be construed as limiting the application.

In order to facilitate understanding of the reversing valve and the air conditioner provided by the embodiment of the application, an application scene of the reversing valve is described first. The reversing valve in the prior art is usually a four-way valve, and the four-way valve can only change the flow of the refrigerant from the exhaust pipe to the indoor side or the outdoor side heat exchanger due to the characteristics of the four-way valve, so that the refrigerating and heating switching is performed; however, because the heat exchanger flow paths are fixed, the refrigerant has large state differences such as refrigerating and heating pressure in the same heat exchanger, and the optimal heat exchange effect cannot be realized. And when the air conditioner heats in winter, the outdoor unit is easy to frost. In order to at least improve one of the above technical problems, the present application provides a reversing valve, and according to the reversing valve, an air conditioner is provided, different flow modes of a refrigerant during refrigeration and heating are reasonably planned, and the refrigeration and heating heat exchange efficiency of the air conditioner is improved, so that the energy efficiency of the air conditioner is improved.

A reversing valve according to an embodiment of the present application is described below with reference to the accompanying drawings. Referring to fig. 1, fig. 2 and fig. 3, fig. 1 is a schematic structural diagram of a reversing valve according to an embodiment of the present application. Fig. 2 is a schematic diagram of a state of an air conditioner during cooling according to an embodiment of the present application. Fig. 3 is a schematic diagram of a state of an air conditioner during heating according to an embodiment of the present application.

Referring to fig. 1, an embodiment of the present application provides a reversing valve including at least: the valve comprises a valve body 11 and a valve core 12, wherein a cavity is defined in the valve body 11, a first opening D, a second opening S, a third opening E, a fourth opening C1 and a fifth opening C2 which are communicated with the cavity are formed in the valve body 11, the first opening D is used for being connected with an outlet of the compressor 2, the second opening S is used for being connected with an inlet of the compressor 2, the third opening E is used for being connected with the indoor unit heat exchanger 3, the fourth opening C1 is used for being connected with the first outdoor heat exchanger 41, and the fifth opening C2 is used for being connected with the second outdoor heat exchanger 42;

the valve core 12 is slidably disposed in the chamber, and the valve core 12 can selectively communicate portions of the plurality of openings, for example, can communicate two, three, or four of the plurality of openings together; specifically, the spool 12 has a first position and a second position;

referring to fig. 2, when the air conditioner is refrigerating, the valve core 12 is in the first position, the second opening S communicates with the third opening E, the first opening D communicates with the fourth opening C1, and the valve core 12 blocks the fifth opening C2. The valve core 12 seals the fifth opening C2, and the refrigerant is restricted from entering the second outdoor heat exchanger 42 from the fifth opening C2, and the refrigerant of the second outdoor heat exchanger 42 is restricted from entering the chamber through the fifth opening C2. Therefore, the refrigerant is prevented from entering a plurality of outdoor heat exchangers at the same time, and the energy consumption of the air conditioner is reduced under the condition of ensuring the refrigeration efficiency.

Referring to fig. 3, when air conditioning is performed, the valve body 12 is in the second position, the first opening D communicates with the third opening E, and the second opening S communicates with the fourth opening C1 and the fifth opening C2. Therefore, the refrigerant passing through the indoor heat exchangers can enter the plurality of outdoor heat exchangers at the same time, the system pressure loss is reduced, and meanwhile, the refrigerant enters the plurality of outdoor heat exchangers at the same time, so that the heat exchange efficiency can be improved.

Referring to fig. 1, in one embodiment, the valve body 11 is generally elongated and the chamber extends within the valve body 11 along the length of the valve body 11. The first opening D is disposed at one side of the valve body 11 in the longitudinal direction, and the second opening S, the third opening E, the fourth opening C1, and the fifth opening C2 are disposed at the other side of the valve body 11 in the longitudinal direction. And the third opening E, the second opening S, the fifth opening C2, and the fourth opening C1 are sequentially arranged at intervals along the length direction of the valve body 11. The valve core 12 is slidably disposed in the chamber, and the sliding direction of the valve core 12 is parallel to the length direction of the valve body 11. The valve core 12 is arc-shaped, the valve core 12 divides the inner space of the chamber into an arc inner space and an arc outer space, and one end of the valve core 12 far away from the third opening E is further extended with a structure for blocking the fifth opening C2.

When the spool 12 slides to one end of the chamber at the first position, the second opening S and the third opening E are both in communication with the arc inside space. The first opening D and the fourth opening C1 are both in communication with the arc outside space. The valve element 12 closes off the fifth opening C2 at an end remote from the third opening E.

When the valve element 12 slides to the other end of the chamber and is located at the second position, the first opening D and the third opening E are both communicated with the outdoor space, so that the second opening S and the fourth opening C1 and the fifth opening C2 are both communicated with the arc inner space.

Referring to fig. 2, when the air conditioner equipped with the reversing valve 1 is refrigerating, the valve core 12 is at the first position, the refrigerant can only flow through the first outdoor heat exchanger 41 through the fourth opening C1, and the air conditioner is normally refrigerating; referring to fig. 3, during heating, the valve core 12 is in the second position and is in communication with the fifth opening C2 of the second outdoor heat exchanger 42, so that the refrigerant flows through the first outdoor heat exchanger 41 and can be split to the second outdoor heat exchanger 42, and at this time, the outdoor heat exchanger 4 is an evaporator, and the air conditioner including the reversing valve 1 can split the refrigerant to more evaporation pipes, thereby reducing the flow rate of the refrigerant, reducing the pressure loss, improving the heating capacity and reducing the possibility of frosting of the outdoor unit.

Compared with the related art, the reversing valve provided by the embodiment of the application is designed with at least five openings, and the number of the fourth openings of the reversing valve can be increased adaptively according to different application conditions.

Referring to fig. 1, 2 and 3, the embodiment of the present application further provides an air conditioner, a reversing valve 1 according to one embodiment of the present application, the fourth opening C1 is configured in plurality, the first outdoor heat exchanger 41 is also in plurality, and each fourth opening C1 communicates with the corresponding first outdoor heat exchanger 41;

specifically, the fourth openings C1 are located at a side of the fifth opening C2 away from the second opening S, and the fourth openings C1 are disposed at intervals.

When the spool 12 is in the first position, the first opening D communicates with the plurality of fourth openings C1 at the same time, and when the spool 12 is in the second position, the second opening S communicates with not only the fifth opening C2 but also the plurality of fourth openings C1 at the same time.

Through the above technical scheme, the air conditioner comprising the reversing valve 1 can be connected with more first outdoor heat exchangers 41 through a plurality of fourth openings C1, so that the refrigerant can flow through more evaporation pipelines when the air conditioner is heated, the heating quantity is improved, and the possibility of frosting on the outdoor heat exchanger 4 is reduced.

In a specific embodiment, the fourth openings C1 are configured in two, and the corresponding first outdoor heat exchangers 41 are also in two, and the two fourth openings C1 communicate with the corresponding first outdoor heat exchangers 41.

Referring to fig. 2 and 3, the present application also provides an air conditioner, which includes: the application provides a reversing valve 1, a compressor 2, an indoor unit heat exchanger 3 and an outdoor unit heat exchanger 4.

The outlet of the compressor 2 is connected to the first opening D; the inlet of the compressor 2 is connected with the second opening S;

the indoor unit heat exchanger 3 is provided with a first end and a second end for the refrigerant to enter and exit, and the first end of the indoor unit heat exchanger 3 is connected with the third opening E;

the outdoor heat exchanger 4 includes a first outdoor heat exchanger 41 and a second outdoor heat exchanger 42, and the first outdoor heat exchanger 41 and the second outdoor heat exchanger 42 are respectively provided with a first end and a second end for the refrigerant to enter and exit, the first end of the first outdoor heat exchanger 41 is connected with the fourth opening C1, the first end of the second outdoor heat exchanger 42 is connected with the fifth opening C2, and the second end of the first outdoor heat exchanger 41 and the second end of the second outdoor heat exchanger 42 are connected with the second end of the indoor heat exchanger 3.

Through the above technical scheme, when the air conditioner is used for refrigerating, the valve core 12 is in the first position, the refrigerant enters the cavity from the first opening D of the reversing valve 1 after exiting from the outlet of the compressor 2, then enters the first outdoor heat exchanger 41 for releasing heat through the fourth opening C1, enters the indoor unit heat exchanger 3 for absorbing heat after exiting from the first outdoor heat exchanger 41, enters the cavity of the reversing valve 1 through the third opening E after exiting from the indoor unit heat exchanger 3, and then flows into the compressor 2 again through the second opening S for circulating refrigerating operation;

when the air conditioner heats, the valve core 12 is positioned at the second position, the fifth opening C2 communicated with the second outdoor heat exchanger 42 is communicated, a refrigerant enters the chamber from the first opening D of the reversing valve 1 after coming out of the outlet of the compressor 2, then enters the indoor unit heat exchanger 3 through the third opening E to release heat, the refrigerant coming out of the indoor unit heat exchanger 3 is split into the first outdoor heat exchanger 41 and the second outdoor heat exchanger 42 to absorb heat, the refrigerant passing through the first outdoor heat exchanger 41 enters the chamber through the fourth opening C1, the refrigerant passing through the second outdoor heat exchanger 42 enters the chamber through the fifth opening C2, and finally enters the compressor 2 through the second opening S to perform cyclic heating work;

when the air conditioner heats, the refrigerant is split into the first outdoor heat exchanger 41 and the second outdoor heat exchanger 42, so that the number of evaporation pipelines through which the refrigerant flows is increased, the heating efficiency is improved, and the possibility of frosting of the outdoor unit is reduced.

In some embodiments, the fourth opening C1 is configured in plurality, and the first outdoor heat exchanger 41 is also in plurality, and each fourth opening C1 communicates with the first end of the corresponding first outdoor heat exchanger 41.

Through the above technical scheme, the refrigerant can be split into a plurality of first outdoor heat exchangers 41 during heating of the air conditioner, namely, the refrigerant can pass through more evaporation pipelines, so that the heating quantity is improved, and the possibility of frosting of the outdoor unit is further reduced.

In some embodiments, each first outdoor heat exchanger 41 includes: a plurality of first heat exchange tube groups 411, each of the first heat exchange tube groups 411 has a first end and a second end for the refrigerant to enter and exit. The first ends of the plurality of first heat exchange tube groups 411 in each first outdoor heat exchanger 41 are connected to the corresponding fourth openings C1, and the second ends of the plurality of first heat exchange tube groups 411 in each first outdoor heat exchanger 41 are connected to the second ends of the indoor unit heat exchangers 3.

Through the above technical solution, each of the first outdoor heat exchangers 41 includes a plurality of first heat exchange tube groups 411, so that the number of evaporation tubes through which the refrigerant flows during heating of the air conditioner is further increased, and the greater the number of evaporation tubes through which the refrigerant flows, the higher the heating amount, and the lower the possibility of frosting of the outdoor unit.

In a specific embodiment, the fourth openings C1 are configured in two, as are the first outdoor heat exchangers 41, and each fourth opening C1 communicates with the first end of the corresponding first outdoor heat exchanger 41. In other embodiments, the fourth openings C1 may be configured in other numbers such as three, four, etc., and the first outdoor heat exchangers 41 are correspondingly configured in number.

In some embodiments, the second outdoor heat exchanger 42 includes: a plurality of second heat exchange tube groups 421, each second heat exchange tube group 421 has a first end and a second end for the inlet and outlet of a refrigerant. The first end of each second heat exchange tube group 421 is connected to the fifth opening C2, and the second end of each second heat exchange tube group 421 is connected to the second end of the indoor unit heat exchanger 3.

Through the above technical scheme, the evaporation pipeline through which the refrigerant flows when the air conditioner heats comprises a plurality of first heat exchange tube groups 411 and a plurality of second heat exchange tube groups 421, so that the number of the evaporation pipelines is further increased, the heating quantity is further improved, and the possibility of frosting of the outdoor unit is reduced.

In some embodiments, the number of second heat exchange tube groups 421 is the same as the number of first outdoor heat exchangers 41, each second heat exchange tube group 421 corresponds to one first outdoor heat exchanger 41, and the second ends of the plurality of first heat exchange tube groups 411 of each first outdoor heat exchanger 41 are connected to the second ends of the corresponding second heat exchange tube groups 421;

in a specific embodiment, the number of the first outdoor heat exchangers 41 is two, and the number of the second heat exchange tube groups 421 is also two.

The second outdoor heat exchanger 42 further includes: the third heat exchange tube group 422 has a first end and a second end for the inlet and outlet of a refrigerant on the third heat exchange tube group 422. The first end of the third heat exchange tube group 422 is connected to the fifth opening C2, and the second end of the third heat exchange tube group 422 is connected to the second end of the indoor unit heat exchanger 3.

Through the above technical scheme, the evaporation pipeline through which the refrigerant flows when the air conditioner heats comprises a plurality of first heat exchange tube groups 411, a plurality of second heat exchange tube groups 421 and a third heat exchange tube group 422, so that the number of evaporation pipelines for refrigerant diversion is further increased, the heating quantity is further improved, and the possibility of frosting of the outdoor unit is reduced.

In some embodiments, the second ends of the plurality of first heat exchange tube groups 411 of each first outdoor heat exchanger 41 are also connected to the second ends of the third heat exchange tube groups 422.

In some embodiments, a first main pipe 412, a first branch 413, and a second branch 414 are provided corresponding to each first outdoor heat exchanger 41, and a first end and a second end for passing in and out the refrigerant are provided on the first main pipe 412, the first branch 413, and the second branch 414.

The first end of the first main pipe 412 is connected to the second ends of the plurality of first heat exchange tube groups 411 of the first outdoor heat exchanger 41, the second end of the first main pipe 412 is connected to the first end of the first branch 413 and the first end of the second branch 414, the second end of the first branch 413 is connected to the second end of the corresponding second heat exchange tube group 421, the second end of the second branch 414 is connected to the second end of the third heat exchange tube group 422, and the second branch 414 is provided with a check valve 43 which is conducted only at the second end of the second branch 414 toward the first end of the second branch 414.

Through the above technical solution, when the air conditioner is refrigerating, the valve core 12 is in the first position, the refrigerant enters the chamber from the first opening D of the reversing valve 1 after exiting from the outlet of the compressor 2, then enters the plurality of first heat exchange tube groups 411 through the fourth opening C1, the refrigerant flowing out from the second ends of the plurality of first heat exchange tube groups 411 of each first outdoor heat exchanger 41 enters the corresponding first manifold, because the second branch 414 is provided with the one-way valve 43, the refrigerant can only enter the second heat exchange tube group 421 through the first branch 413 after exiting from the first manifold, and also because of the blocking of the fifth opening C2, the refrigerant can only flow into the third heat exchange tube group 422 after exiting from the second heat exchange tube group 421, finally enters the indoor heat exchanger 3 from the third heat exchange tube group 422, enters the chamber of the reversing valve 1 through the third opening E after exiting from the indoor heat exchanger 3, and then flows into the compressor 2 again through the second opening S for circulating operation;

in the above technology, the refrigerant is split into the plurality of first heat exchange tube groups 411 of the plurality of first indoor heat exchangers 3, then the refrigerant in the plurality of first heat exchange tube groups 411 of each first outdoor heat exchanger 41 is converged into the corresponding second heat exchange tube group 421, and then the refrigerant in the plurality of second heat exchange tube groups 421 is converged into the third heat exchange tube group 422, so that the plurality of heat exchange tube groups in the outdoor unit are reasonably utilized, and the refrigerant is split into the plurality of first heat exchange tube groups 411 at most during refrigeration of the air conditioner, so that the number of split-flow tubes is small, the pressure loss of the system is reduced, the flow velocity of the refrigerant is increased, and the supercooling degree is increased.

When the air conditioner heats, the valve core 12 is positioned at the second position, the fifth opening C2 communicated with the second outdoor heat exchanger 42 is communicated, a refrigerant enters the chamber from the first opening D of the reversing valve 1 after exiting from the outlet of the compressor 2, then enters the indoor heat exchanger 3 through the third opening E to release heat, the refrigerant exiting from the indoor heat exchanger 3 is split into a plurality of first heat exchange tube groups 411, a plurality of second heat exchange tube groups 421 and a third heat exchange soft group, the refrigerant passing through the first heat exchange tube groups 411 enters the chamber through the fourth opening C1, the refrigerant passing through the second heat exchange tube groups 421 and the third heat exchange soft group enters the chamber through the fifth opening C2, and finally enters the compressor 2 through the second opening S to circularly work;

when the air conditioner heats, the refrigerant is split into the plurality of first heat exchange tube groups 411, the plurality of second heat exchange tube groups 421 and the plurality of third heat exchange tube groups 422, so that the number of evaporation pipelines through which the refrigerant flows is increased, the heating quantity is improved, and the possibility of frosting of an outdoor unit is reduced.

In some embodiments, a throttle valve 5 is disposed between the second end of the third heat exchange tube group 422 and the second end of the indoor unit heat exchanger 3. The throttle valve 5 is a two-way throttle valve 5.

An embodiment of an air conditioner according to the present application will be described with reference to fig. 1 to 3.

An air conditioner of the present application includes: a reversing valve 1, a compressor 2, an indoor heat exchanger 3, a throttle valve 5 and an outdoor heat exchanger 4.

The reversing valve 1 includes a valve body 11 and a valve spool 12, the valve body 11 is integrally elongated, a chamber is defined inside the valve body 11, and the chamber extends in the valve body 11 in the longitudinal direction of the valve body 11. The valve body 11 is provided with a first opening D, a second opening S, a third opening E, a fourth opening C1 and a fifth opening C2 communicating with the chamber, wherein the fourth opening C1 is provided with two.

The first opening D is disposed at one side of the valve body 11 in the length direction, and the second opening S, the third opening E, the two fourth openings C1 and the fifth opening C2 are all disposed at the other side of the valve body 11 in the length direction. And the third opening E, the second opening S, the fifth opening C2, and the two fourth openings C1 are sequentially arranged at intervals along the length direction of the valve body 11.

The valve core 12 is slidably disposed in the chamber, and the sliding direction of the valve core 12 is parallel to the length direction of the valve body 11. The valve core 12 is of an arc shape as a whole, the valve core 12 divides the inner space of the chamber into an arc inner space and an arc outer space, the first opening D is communicated with the arc outer space, and one end, far away from the third opening E, of the valve core 12 is further extended with a structure for blocking the fifth opening C2.

The spool 12 has a first position and a second position.

When the valve element 12 slides to the end portion of the chamber near the third opening E, the valve element 12 is positioned at the first position, and both the second opening S and the third opening E are communicated with the space inside the arc, so that the second opening S is communicated with the third opening E. The first opening D and the two fourth openings C1 are both communicated with the arc outside space, so that the first opening D and the two fourth openings C are communicated. The valve element 12 closes off the fifth opening C2 at an end remote from the third opening E.

When the spool 12 slides to the end of the chamber near the fourth opening C1, the spool 12 is in the second position, and both the first opening D and the third opening E communicate with the outdoor side space, thereby causing the first opening D to communicate with the third opening E. The second opening S, the two fourth openings C1, and the fifth opening C2 are all in communication with the arc inside space, so that the two fourth openings C1 and the fifth opening C2 are both in communication with the second opening S.

The outlet of the compressor 2 is connected to the first opening D and the inlet of the compressor 2 is connected to the second opening S.

The indoor unit heat exchanger 3 is provided with a first end and a second end for the refrigerant to enter and exit, and the first end of the indoor unit heat exchanger 3 is connected with the third opening E.

The throttle valve 5 is provided with a first end and a second end for the refrigerant to enter and exit, and the second end of the indoor unit heat exchanger 3 is connected with the first end of the throttle valve 5.

The outdoor heat exchanger 4 includes two first outdoor heat exchangers 41 and a second outdoor heat exchanger 42. The two first outdoor heat exchangers 41 correspond to the two fourth openings C1, respectively, and the second outdoor heat exchanger 42 corresponds to the fifth opening C2.

Each of the first outdoor heat exchangers 41 includes two first heat exchange tube groups 411, and each of the first heat exchange tube groups 411 is provided with a first end and a second end for the passage of a refrigerant. The first ends of the two first heat exchange tube groups 411 of each first outdoor heat exchanger 41 are each in communication with a corresponding fourth opening C1.

The second outdoor heat exchanger 42 includes two second heat exchange tube groups 421 and one third heat exchange tube group 422, and first and second ends for the inflow and outflow of a refrigerant are provided on both the second and third heat exchange tube groups 421 and 422. The first ends of the two second heat exchange tube group 421 and the third heat exchange tube group 422 are each in communication with the fifth opening C2, and the second ends of the two second heat exchange tube group 421 and the third heat exchange tube group 422 are each in communication with the second end of the throttle valve 5.

The two second heat exchange tube groups 421 correspond to the two first outdoor heat exchangers 41, respectively.

A first main pipe 412, a first branch 413 and a second branch 414 are provided corresponding to each first outdoor heat exchanger 41, and a first end and a second end for the refrigerant to enter and exit are provided on the first main pipe 412, the first branch 413 and the second branch 414. The second ends of the two first heat exchange tube groups 411 of each first outdoor heat exchanger 41 are connected to the first ends of the corresponding first header pipes 412. A first end of each of the first branch 413 and the second branch 414 is connected to a second end of the corresponding first main conduit 412. A second end of each first leg 413 is connected to a second end of a corresponding second heat exchange tube bank 421 and a second end of each second leg 414 is connected to a second end of a third heat exchange tube bank 422.

Each second branch 414 is provided with a one-way valve 43 which is only conducted at the second end of the second branch 414 towards the first end of the second branch 414.

When the air conditioner is refrigerating, the valve core 12 is at the first position, the refrigerant enters the space outside the arc through the first opening D after exiting from the outlet of the compressor 2, then is split into the two first outdoor heat exchangers 41 through the two fourth openings C1, the refrigerant entering the first outdoor heat exchangers 41 is split into the two first heat exchange tube groups 411, and the refrigerant exiting from the first heat exchange tube groups 411 enters the corresponding first total pipelines 412. Since the second branch lines 414 are each provided with the check valve 43 for restricting the flow of the refrigerant from the first main line 412 to the throttle valve 5, the refrigerant in the first main line 412 enters the corresponding second heat exchange tube group 421 through the first branch line 413. That is, the refrigerant in the two first heat exchange tube groups 411 of each first outdoor heat exchanger 41 is merged into one corresponding second heat exchange tube group 421. Because the valve core 12 seals the fifth opening C2, the refrigerants in the two second heat exchange tube groups 421 can only flow into the third heat exchange tube group 422, the refrigerants coming out of the third heat exchange tube group 422 pass through the throttle valve 5 and then enter the indoor heat exchanger, the refrigerants coming out of the indoor heat exchanger enter the space inside the arc through the third opening E, and then enter the compressor 2 through the second opening S for circulating refrigeration.

That is, during cooling, the refrigerant flows through the outdoor unit in a manner of being split into four first heat exchange tube groups 411, then being merged into two second heat exchange tube groups 421, and finally being merged into one third heat exchange tube group 422. The number of the branch pipelines is small, the flow velocity of the refrigerant is increased, the heat exchange coefficient is increased, and the supercooling degree is increased.

When the air conditioner is heating, the valve core 12 is in the second position, the refrigerant enters the space outside the arc through the first opening D after exiting from the outlet of the compressor 2, then enters the indoor heat exchanger through the third opening E, and the refrigerant exiting from the indoor heat exchanger is split into four first heat exchange tube groups 411, two second heat exchange tube groups 421 and one third heat exchange tube group 422 after passing through the throttle valve 5. The refrigerant in the two first heat exchange tube groups 411 in each first outdoor heat exchanger 41 enters the arc inner space through the corresponding fourth opening C1, and the refrigerant in the two second heat exchange tube groups 421 and one third heat exchange tube group 422 enters the arc inner space through the fifth opening C2. The refrigerant in the space inside the arc enters the compressor 2 through the second opening S to perform cyclic heating operation.

That is, during heating, the refrigerant flows in the outdoor unit in a manner of being split into four first heat exchange tube groups 411, two second heat exchange tube groups 421 and one third heat exchange tube group 422, so that a plurality of split evaporation pipelines are provided, the flow rate of the refrigerant is reduced, the pressure loss is reduced, the heating capacity is improved, and the possibility of frosting of the outdoor unit is reduced.

Compared with the related art, the air conditioner provided by the embodiment of the application designs different flow paths of the refrigerant in the outdoor side heat exchanger aiming at different working conditions of air conditioner refrigeration and heating, and fully uses a plurality of heat exchange tube groups on the outdoor side, so that the flow rate of the refrigerant is increased when the air conditioner is used for refrigeration, the supercooling degree is increased, the heating quantity is increased when the air conditioner is used for heating, and the possibility of frosting of an outdoor unit is reduced.

In the description of the present application, it is to be understood that the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counter-clockwise", "axial", "radial", "circumferential", etc. are orientation or positional relationships based on the drawings, and are merely for convenience of description and simplification of description, and do not indicate or imply that the apparatus or elements referred to must have a specific orientation.

In the description of the application, "a first feature" or "a second feature" may include one or more of the features.

In the description of the present application, "plurality" means two or more.

In the description of the application, a first feature "above" or "below" a second feature may include both the first and second features being in direct contact, and may also include the first and second features not being in direct contact but being in contact with each other by another feature therebetween.

In the description of the application, a first feature is "above" and "over" a second feature includes both the first feature being directly above and obliquely above the second feature, or simply indicates that the first feature is higher in level than the second feature.

In the description herein, a description of the terms "one embodiment," "some embodiments," "exemplary embodiments," "examples," "specific examples," "some examples," etc., refer to particular features, structures, materials, or characteristics described in connection with that embodiment or example. In this specification, schematic representations of the above terms do not necessarily refer to the same embodiments or examples. The described features, structures, materials, or characteristics may be combined in any suitable manner in any one or more embodiments or examples.

While embodiments of the present application have been shown and described, it will be understood by those of ordinary skill in the art that: various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the application, the scope of which is defined by the claims and their equivalents.

Claims (10)

1. A reversing valve, comprising:

the valve body is internally provided with a first opening, a second opening, a third opening, a fourth opening and a fifth opening, the first opening is connected with an outlet of the compressor, the second opening is connected with an inlet of the compressor, the third opening is connected with an indoor unit heat exchanger, the fourth opening is connected with a first outdoor heat exchanger, and the fifth opening is connected with a second outdoor heat exchanger;

a valve spool slidably disposed within the chamber, the valve spool having a first position and a second position;

when the valve core is in a first position, the second opening is communicated with the third opening, the first opening is communicated with the fourth opening, and the valve core seals the fifth opening;

when the spool is in the second position, the first opening communicates with the third opening, and the second opening communicates with the fourth opening and the fifth opening.

2. The reversing valve of claim 1, wherein said fourth opening is configured in a plurality, said first outdoor heat exchanger also being a plurality, each of said fourth openings being in communication with a corresponding one of said first outdoor heat exchangers;

when the valve core is in a first position, the first opening is communicated with a plurality of fourth openings at the same time, and when the valve core is in a second position, the second opening is communicated with a plurality of fourth openings at the same time.

3. An air conditioner, comprising:

the reversing valve of any one of claims 1-2;

a compressor, an outlet of the compressor being connected to the first opening; the inlet of the compressor is connected with the second opening;

the first end of the indoor unit heat exchanger is connected with the third opening;

the outdoor unit heat exchanger comprises a first outdoor heat exchanger and a second outdoor heat exchanger, wherein the first end of the first outdoor heat exchanger is connected with the fourth opening, the first end of the second outdoor heat exchanger is connected with the fifth opening, and the second end of the first outdoor heat exchanger and the second end of the second outdoor heat exchanger are connected with the second end of the indoor unit heat exchanger.

4. The air conditioner of claim 3, wherein the fourth openings are configured in plurality, the first outdoor heat exchanger is also in plurality, and each of the fourth openings communicates with the first end of the corresponding first outdoor heat exchanger.

5. The air conditioner of claim 4, wherein each of the first outdoor heat exchangers includes: the first ends of the plurality of first heat exchange tube groups in each first outdoor heat exchanger are connected with the corresponding fourth openings, and the second ends of the plurality of first heat exchange tube groups in each first outdoor heat exchanger are connected with the second ends of the indoor unit heat exchangers.

6. The air conditioner of claim 5, wherein the second outdoor heat exchanger comprises: and the first ends of the second heat exchange tube groups are connected with the fifth opening, and the second ends of the second heat exchange pipelines are connected with the second ends of the indoor unit heat exchangers.

7. An air conditioner according to claim 6 wherein the number of said second heat exchange tube groups is the same as the number of said first outdoor heat exchangers, said second ends of a plurality of said first heat exchange tube groups of each said first outdoor heat exchanger being connected to said second ends of a corresponding said second heat exchange tube;

the second outdoor heat exchanger further includes: and the first end of the third heat exchange tube group is connected with the fifth opening, and the second end of the third heat exchange tube group is connected with the second end of the indoor unit heat exchanger.

8. An air conditioner according to claim 7 wherein the second ends of a plurality of said first heat exchange tube groups of each said first outdoor heat exchanger are also connected to the second ends of said third heat exchange tube groups.

9. An air conditioner according to claim 8 wherein the second ends of the plurality of first heat exchange tube groups of each of the first outdoor heat exchangers are connected to the second ends of the corresponding second heat exchange tube groups and the second ends of the third heat exchange tube groups, respectively, through a first main pipe and first and second branches connected to the first main pipe;

the first end of the first main pipeline is connected with the second ends of the plurality of first heat exchange tube groups of the first outdoor heat exchanger, the second end of the first main pipeline is connected with the first end of the first branch pipeline and the first end of the second branch pipeline, the second end of the first branch pipeline is connected with the second end of the corresponding second heat exchange tube group, the second end of the second branch pipeline is connected with the second end of the third heat exchange tube group, and a one-way valve which is only conducted from the second end of the second branch pipeline to the first end of the second branch pipeline is arranged on the second branch pipeline.

10. An air conditioner according to claim 7 wherein a throttle valve is provided between the second end of the third heat exchange tube group and the second end of the indoor unit heat exchanger.