Heat exchanger and air conditioner

Abstract

The utility model relates to the technical field of air conditioning equipment, in particular to a heat exchanger and an air conditioner. The heat exchanger is applied to the air conditioner, the air conditioner has a reheating dehumidification mode, and the heat exchanger comprises a first heat exchange part, a second heat exchange part and a first throttling element; in the reheating dehumidification mode, the first heat exchange part is configured to heat air flowing through the first heat exchange part; the second heat exchange part is configured to cool and dehumidify the air flowing through the second heat exchange part; the ratio of the action area of the first heat exchange part and the air to the action area of the second heat exchange part and the air is 0.2-2; the first throttling element is arranged between the first heat exchange part and the second heat exchange part in series. The proportion of the action area of the first heat exchange part and the action area of the second heat exchange part and the air is limited, and therefore it can be effectively guaranteed that the good temperature control dehumidification effect can be achieved in the reheating dehumidification mode, and the use experience feeling of a user is improved.

Description

Technical Field

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

[0002] With the development of economy and the gradual improvement of people's living standards, people have a higher demand for beautiful room decoration and living environment. Among them, duct air conditioners are popular among consumers because of their ultra-thin housing that can meet people's installation requirements.

[0003] The climate in the middle and lower reaches of the Yangtze River and southern China is typically characterized by the "plum rain season" and "return of the south wind" weather. Although the living environment in these areas is relatively suitable for temperature, the relative humidity is high, which has a significant impact on people's lives and the environment. Therefore, it is necessary to control the relative humidity of the air in these areas.

[0004] Conventional air conditioners primarily use cooling dehumidification. When the evaporator surface temperature falls below the dew point of the return air, water vapor in the air condenses and is discharged outdoors. However, this cooling dehumidification method also causes a drop in indoor temperature, reducing indoor comfort and significantly diminishing the user experience. Utility Model Content

[0005] In view of this, the present invention provides a heat exchanger and an air conditioner for solving the problem that existing conventional air conditioners, while dehumidifying, also cause a drop in indoor temperature, thereby reducing the comfort of the indoor living environment and the user experience.

[0006] A first aspect of an embodiment of the present invention provides a heat exchanger applied to an air conditioner, wherein the air conditioner has a reheat dehumidification mode, the heat exchanger comprising: a first heat exchange portion, a second heat exchange portion, and a first throttling element;

[0007] The first heat exchange portion is configured to heat the air flowing through the first heat exchange portion in the reheat dehumidification mode;

[0008] The second heat exchange unit is configured to cool and dehumidify the air flowing through the second heat exchange unit in the reheat dehumidification mode;

[0009] Wherein, the ratio of the effective area of ​​the first heat exchange part and the air to the effective area of ​​the second heat exchange part and the air is between 0.2 and 2;

[0010] The first throttling element is arranged in series between the first heat exchange part and the second heat exchange part.

[0011] In some embodiments, a ratio of an effective area between the first heat exchange portion and the air to an effective area between the second heat exchange portion and the air is between 0.8 and 1.25.

[0012] In some embodiments, the first heat exchange portion includes three rows of first heat exchange tubes, and the three rows of first heat exchange tubes are formed with a plurality of first branch inlets and a plurality of first branch outlets;

[0013] and, the second heat exchange portion includes three rows of second heat exchange tubes, the three rows of second heat exchange tubes being formed with a plurality of second branch inlets and a plurality of second branch outlets;

[0014] In the reheat dehumidification mode, the refrigerant enters the first heat exchange part through the first diverter through the multiple first branch inlets, flows out through the multiple first branch outlets, and then enters the first throttling element through the second diverter. The throttled refrigerant enters the second heat exchange part through the multiple second branch inlets through the third diverter, and flows out through the multiple second branch outlets through the fourth diverter.

[0015] In some embodiments, the first heat exchange portion includes two rows of third heat exchange tubes, and the two rows of third heat exchange tubes are formed with a plurality of third branch inlets and a plurality of third branch outlets;

[0016] and, the second heat exchange portion comprises two rows of fourth heat exchange tubes, the two rows of fourth heat exchange tubes being formed with a plurality of fourth branch inlets and a plurality of fourth branch outlets;

[0017] In the reheat dehumidification mode, the refrigerant enters the first heat exchange part through the fifth diverter via the multiple third branch inlets, flows out through the multiple third branch outlets, and enters the first throttling element through the sixth diverter. The throttled refrigerant enters the second heat exchange part through the multiple fourth branch inlets through the seventh diverter, and flows out through the multiple fourth branch outlets through the eighth diverter.

[0018] In some embodiments, the air conditioner further includes a heating mode and a cooling mode;

[0019] In the heating mode, the first heat exchange portion and the second heat exchange portion both function as condensers; and

[0020] In the cooling mode, the first heat exchange portion and the second heat exchange portion both function as evaporators;

[0021] Wherein, in the heating mode and the cooling mode, the first throttling element is in a fully open state.

[0022] A second aspect of an embodiment of the present utility model provides an air conditioner, the air conditioner comprising an indoor heat exchanger, a four-way reversing valve, an outdoor heat exchanger, a second throttling element and a compressor;

[0023] The indoor heat exchanger includes the heat exchanger as described in the first aspect;

[0024] The four-way reversing valve is provided with a first port, a second port, a third port and a fourth port, and the fourth port is connected to the fourth diverter or the eighth diverter in the indoor heat exchanger through an air pipe;

[0025] One end of the outdoor heat exchanger is in communication with the first port, and the other end of the outdoor heat exchanger is in communication with one end of the second throttling element;

[0026] The other end of the second throttling element is connected to the first flow divider or the fifth flow divider in the indoor heat exchanger through a liquid pipe;

[0027] The inlet end of the compressor is communicated with the third port, and the outlet end of the compressor is communicated with the second port.

[0028] In some embodiments, a first flow control valve is provided between the second throttling element and the indoor heat exchanger; and

[0029] A second flow control valve is provided between the four-way reversing valve and the indoor heat exchanger.

[0030] In some embodiments, a control device is further included, which can coordinately control the respective actions of the outdoor heat exchanger, the second throttling element, the first circulation control valve, the indoor heat exchanger, the second circulation control valve, the four-way reversing valve and the compressor according to the operating mode of the air conditioner and / or outdoor parameters and / or the thermal comfort requirements of the user to adapt to the operating mode of the air conditioner and / or outdoor parameters and / or the thermal comfort requirements of the user.

[0031] In some embodiments, the air conditioner is a ducted air conditioner.

[0032] Compared with the prior art, the beneficial effects of the present invention are mainly:

[0033] In the heat exchanger and air conditioner of the present invention, the heat exchanger is applied to the air conditioner, and the air conditioner has a reheat dehumidification mode. The heat exchanger includes: a first heat exchange part, a second heat exchange part and a first throttling element; the first heat exchange part is configured to heat the air flowing through the first heat exchange part in the reheat dehumidification mode; the second heat exchange part is configured to cool and dehumidify the air flowing through the second heat exchange part in the reheat dehumidification mode; the ratio of the effective area of ​​the first heat exchange part to the air and the effective area of ​​the second heat exchange part to the air is between 0.2 and 2; the first throttling element is arranged in series between the first heat exchange part and the second heat exchange part.

[0034] Based on this, the first heat exchange part is used as a reheat condenser, and the second heat exchange part is used as a reheat evaporator. While the second heat exchange part dehumidifies and cools the air flowing through it, the first heat exchange part is used to exchange heat with the air flowing through it to compensate for the dehumidification heat of the reheat evaporator. The two air flows are mixed before being sent out of the air conditioner, thereby forming an air supply mode with low moisture content and temperature close to the inlet air temperature, which effectively improves the user's living comfort; on the other hand, the ratio of the effective area of ​​the first heat exchange part and the effective area of ​​the second heat exchange part and the air is limited. At the same time, a first throttling element is connected in series between the first heat exchange part and the second heat exchange part, which effectively ensures that good temperature control and dehumidification effects can be achieved in the reheat dehumidification mode, greatly improving the user's usage experience. BRIEF DESCRIPTION OF THE DRAWINGS

[0035] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for the embodiments or the description of the prior art. Obviously, the drawings described below are merely exemplary, and those skilled in the art can, without inventive effort, derive other implementation drawings based on the provided drawings.

[0036] The structures, proportions, sizes, etc. illustrated in this specification are intended solely to complement the contents disclosed herein and to facilitate understanding and reading by persons familiar with the art. They are not intended to limit the conditions under which the present invention may be implemented and therefore have no substantive technical significance. Any structural modifications, changes in proportions, or adjustments in size, without affecting the efficacy and objectives of the present invention, shall remain within the scope of the technical contents disclosed herein.

[0037] Figure 1 This is a structural schematic diagram of a heat exchanger according to an embodiment of the present utility model;

[0038] Figure 2 1 is a schematic structural diagram of another heat exchanger according to an embodiment of the present utility model;

[0039] Figure 3 It is a structural schematic diagram of an air conditioner according to an embodiment of the utility model.

[0040] Description of reference numerals:

[0041] 10. Air conditioner; 11. Indoor heat exchanger; 12. Four-way reversing valve; 13. Outdoor heat exchanger; 14. Second throttling element; 15. Compressor; 16. Gas pipe; 17. Liquid pipe; 18. First flow control valve; 19. Second flow control valve; C, first port; D, second port; S, third port; E, fourth port;

[0042] 100, heat exchanger; 200, first heat exchange unit; 210, first heat exchange tube; 211, first branch inlet; 212, first branch outlet; 220, third heat exchange tube; 221, third branch inlet; 222, third branch outlet; 300, second heat exchange unit; 310, second heat exchange tube; 311, second branch inlet; 312, second branch outlet; 320, fourth heat exchange tube; 321, fourth branch inlet; 322, fourth branch outlet;

[0043] 400, first throttling element; 500, first diverter; 600, second diverter; 700, third diverter; 800, fourth diverter;

[0044] 900, fifth diverter; 1000, sixth diverter; 1100, seventh diverter; 1200, eighth diverter. DETAILED DESCRIPTION

[0045] The following describes the implementation of the present invention through specific embodiments. Those skilled in the art can readily understand the other advantages and benefits of the present invention from the contents disclosed in this specification. Obviously, the embodiments described are only a portion of the embodiments of the present invention, not all of them. All other embodiments derived by persons of ordinary skill in the art based on the embodiments of the present invention without inventive effort are also within the scope of protection of the present invention.

[0046] The terms used in the embodiments of the present invention are for the purpose of describing specific embodiments only and are not intended to limit the present invention. The singular forms "a," "the," and "the" used in the embodiments of the present invention and the appended claims are also intended to include plural forms, unless the context clearly indicates otherwise. "A plurality" generally includes at least two, but does not exclude the inclusion of at least one.

[0047] It should be understood that the term "and / or" as used herein is merely a description of the relationship between associated objects, indicating that three possible relationships exist. For example, "A and / or B" can represent: A exists alone, A and B exist simultaneously, or B exists alone. Furthermore, the character " / " in this document generally indicates that the associated objects are in an "or" relationship.

[0048] It should also be noted that the terms "include," "comprises," or any other variations thereof are intended to encompass non-exclusive inclusion, such that a product or system comprising a series of elements includes not only those elements but also other elements not explicitly listed, or elements inherent to such product or system. In the absence of further limitations, an element defined by the phrase "comprises a..." does not exclude the presence of other identical elements in the product or system comprising the element.

[0049] The embodiments of the present invention are described in detail below, and examples of the embodiments are shown in the accompanying drawings. The embodiments described below with reference to the accompanying drawings are exemplary and are intended to be used to explain the present invention, but should not be understood as limiting the present invention.

[0050] like Figure 1 and Figure 2 As shown, an exemplary embodiment of the present invention provides a heat exchanger 100, which can be used in an air conditioner, wherein the air conditioner can be a duct air conditioner, and the duct air conditioner can be an integrated structure, or a split structure.

[0051] The air conditioner has a reheat dehumidification mode. It should be noted that the reheat dehumidification mode is designed to divide the indoor heat exchanger into two parts. One part is used to bear the indoor wet load, that is, to reduce the indoor humidity to the target humidity through cooling dehumidification, and the other part of the heat exchanger heats the indoor air. After the two parts of air are mixed, the air outlet temperature of the air conditioner is maintained at a higher temperature, thereby achieving constant temperature dehumidification.

[0052] Specifically, when the air conditioner operates in reheat dehumidification mode, part of the indoor heat exchanger functions as a condenser, cooling and dehumidifying the air passing through the condenser portion. Simultaneously, the remaining heat exchanger functions as a normal heat exchanger, exchanging heat with the air passing through it and raising the temperature of that air. The cooled and dehumidified air merges with the heated air, creating a low-humidity airflow pattern close to the air conditioner's inlet temperature, enhancing user comfort.

[0053] The heat exchanger 100 includes a first heat exchange portion 200, a second heat exchange portion 300, and a first throttling element 400. It should be noted that the first heat exchange portion 200, the second heat exchange portion 300, and the first throttling element 400 connected in series between the two heat exchange portions can together constitute an indoor heat exchanger portion in an air conditioner structure.

[0054] In the reheat dehumidification mode, the first heat exchange unit 200 is configured to heat the air flowing through the first heat exchange unit 200 to increase the temperature of the air. In other words, in the reheat dehumidification mode, the first heat exchange unit 200 is used as a reheat condenser.

[0055] Furthermore, in the reheat dehumidification mode, the second heat exchange portion 300 is configured to cool and dehumidify the air flowing through the second heat exchange portion 300. That is, in the reheat dehumidification mode, the second heat exchange portion 300 is used as a reheat evaporator.

[0056] In order to ensure the mixing effect of the air heated by the first heat exchange part 200 and the air cooled and dehumidified by the second heat exchange part 300, the ratio of the effective area between the first heat exchange part 200 and the air and the effective area between the second heat exchange part 300 and the air is limited.

[0057] Here, the interaction area between the first heat exchange unit 200 and the air is defined as A, and the interaction area between the second heat exchange unit 300 and the air is defined as B, then A:B = (0.2-2). It should be noted that the ratio of the interaction area A to the interaction area B is limited in this example, and the ratio of the interaction area A to the interaction area B can be flexibly set according to the environment or horizontal height of the air conditioner.

[0058] For example, when the air conditioner is installed in an environment with a large temperature difference between indoor and outdoor, such as the northern environment in winter, the effective area A can be set to be larger than the effective area B, that is, the ratio of the effective area A to the effective area B is greater than or equal to 1, but less than or equal to 2.

[0059] When the air conditioner is installed at a high altitude, such as in a plateau environment, the temperature difference between indoor and outdoor environments is also large. At this time, the effective area A can be set to be larger than the effective area B, that is, the ratio of the effective area A to the effective area B is greater than or equal to 1, but the ratio is less than or equal to 2.

[0060] In the above example, due to the large temperature difference between the indoor and outdoor environments, the effective area A for heating the air is designed to be larger than the effective area B for cooling and dehumidifying the air. Then, the proportion of air heated by the first heat exchange part 200 is larger than the proportion of air cooled and dehumidified by the second heat exchange part 300, so as to ensure that the temperature of the mixed air is as close as possible to the outlet temperature of the air at the air outlet of the air conditioner, thereby effectively improving the user's living comfort.

[0061] When the air conditioner is installed in an environment with a small temperature difference between indoor and outdoor, such as the southern environment in winter, where the temperature difference between indoor and outdoor is small, the effective area A can be set to be smaller than the effective area B, that is, the ratio of the effective area A to the effective area B is less than or equal to 1, but the ratio is greater than or equal to 0.2.

[0062] When the air conditioner is installed in a location with a low horizontal altitude, such as in the southern plains, the temperature difference between indoor and outdoor environments is small. At this time, the effective area A can be set to be smaller than the effective area B, that is, the ratio of the effective area A to the effective area B is less than or equal to 1, but greater than or equal to 0.2.

[0063] In the above example, since the temperature difference between the indoor and outdoor environments is small, the effective area A for heating the air is designed to be smaller than the effective area B for cooling and dehumidifying the air. Then, the proportion of air heated by the first heat exchange part 200 is smaller than the proportion of air cooled and dehumidified by the second heat exchange part 300, thereby ensuring that the temperature of the mixed air is as close as possible to the outlet temperature of the air at the air outlet of the air conditioner, and the temperature of the mixed air is within the comfortable temperature range for the user to live in, thereby effectively improving the user's living comfort.

[0064] In one example, the ratio of the effective area A of the first heat exchange part 200 and the air to the effective area B of the second heat exchange part 300 and the air ranges from 0.4 to 1.7.

[0065] In order to ensure the stability of the first heat exchange part 200 and the second heat exchange part 300 when they respectively interact with the air, to prevent the first heat exchange part 200 from affecting the second heat exchange part 300 when it interacts with the air, and to prevent the second heat exchange part 300 from affecting the first heat exchange part 200 when it interacts with the air, a first throttling element 400 is connected in series between the first heat exchange part 200 and the second heat exchange part 300.

[0066] Among them, in order to ensure that the circulating medium flowing through the first heat exchange part 200 can flow smoothly into the second heat exchange part 300 in the reheat dehumidification mode, or, in other modes, such as cooling mode or heating mode, to ensure the smoothness of the flow between the first heat exchange part 200 and the second heat exchange part 300, the first throttling element 400 adopts an electronic expansion valve with a large flow cross-sectional area.

[0067] In this example, in the reheat dehumidification mode, the first heat exchange part 200 is used as a reheat condenser, and the second heat exchange part 300 is used as a reheat evaporator. While the second heat exchange part 300 dehumidifies and cools the air flowing through it, the first heat exchange part 200 is used to exchange heat with the air flowing through it to compensate for the dehumidification heat of the reheat evaporator. The two air flows are mixed before being sent out of the air conditioner, thereby forming an air supply mode with low moisture content and a temperature close to the inlet air temperature, which effectively improves the user's living comfort; on the other hand, the ratio of the effective area of ​​the first heat exchange part 200 and the air to the effective area of ​​the second heat exchange part 300 and the air is limited. At the same time, a first throttling element 400 is connected in series between the first heat exchange part 200 and the second heat exchange part 300, which effectively ensures that a good temperature control and dehumidification effect can be achieved in the reheat dehumidification mode, greatly improving the user's usage experience.

[0068] like Figure 1 and Figure 2 As shown, in some embodiments, the ratio of the active area of ​​the first heat exchange part 200 to the air to the active area of ​​the second heat exchange part 300 to the air is between 0.8 and 1.25. That is, the ratio of the active area A to the active area B is in the range of 0.8 to 1.25.

[0069] It should be noted that the above ratio can be obtained by taking the ratio of the number of U-shaped copper tubes in the first heat exchange part 200 and the second heat exchange part 300 as the above ratio.

[0070] The ratio of the effective area A to the effective area B can be flexibly set according to the environment or the horizontal height of the air conditioner.

[0071] For example, when the air conditioner is installed in an environment with a large temperature difference between indoor and outdoor, such as the northern environment in winter, the effective area A can be set to be larger than the effective area B, that is, the ratio of the effective area A to the effective area B is greater than or equal to 1, but less than or equal to 1.25.

[0072] When the air conditioner is installed at a high altitude, such as in a plateau environment, the temperature difference between indoor and outdoor environments is also large. At this time, the effective area A can also be set to be larger than the effective area B, that is, the ratio of the effective area A to the effective area B is greater than or equal to 1, but the ratio is less than or equal to 1.25.

[0073] In the above example, due to the large temperature difference between the indoor and outdoor environments, the effective area A for heating the air is designed to be larger than the effective area B for cooling and dehumidifying the air. Then, the proportion of air heated by the first heat exchange part 200 is larger than the proportion of air cooled and dehumidified by the second heat exchange part 300, so as to ensure that the temperature of the mixed air is as close as possible to the outlet temperature of the air at the air outlet of the air conditioner, thereby effectively improving the user's living comfort.

[0074] When the air conditioner is installed in an environment with a small temperature difference between indoor and outdoor, such as the southern environment in winter, where the temperature difference between indoor and outdoor is small, the effective area A can be set to be smaller than the effective area B, that is, the ratio of the effective area A to the effective area B is less than or equal to 1, but greater than or equal to 0.8.

[0075] When the air conditioner is installed in a location with a low horizontal altitude, such as in the southern plains, the temperature difference between indoor and outdoor environments is small. At this time, the effective area A can be set to be smaller than the effective area B, that is, the ratio of the effective area A to the effective area B is less than or equal to 1, but greater than or equal to 0.8.

[0076] In the above example, since the temperature difference between the indoor and outdoor environments is small, the effective area A for heating the air is designed to be smaller than the effective area B for cooling and dehumidifying the air. Then, the proportion of air heated by the first heat exchange part 200 is smaller than the proportion of air cooled and dehumidified by the second heat exchange part 300, thereby ensuring that the temperature of the mixed air is as close as possible to the outlet temperature of the air at the air outlet of the air conditioner, and the temperature of the mixed air is within the comfortable temperature range for the user to live in, thereby effectively improving the user's living comfort.

[0077] like Figure 1 and Figure 2 As shown, in some embodiments, the first heat exchange portion 200 and the second heat exchange portion 300 are arranged relative to each other at a predetermined angle. It should be noted that in this example, the first heat exchange portion 200 and the second heat exchange portion 300 are arranged at a predetermined angle along the side of the first heat exchange portion 200 or the second heat exchange portion 300. The predetermined angle can be flexibly set based on the internal structure of the indoor heat exchanger components or the internal space structure. In other words, the range of the predetermined angle is not limited herein.

[0078] In this example, while fully considering the internal structure of the indoor heat exchanger component or the internal space structure, the first heat exchange part 200 and the second heat exchange part 300 are arranged relative to each other at a predetermined angle, which can ensure the compactness of the internal structure of the indoor heat exchanger component, that is, the overall design size of the indoor heat exchanger component can be reduced.

[0079] like Figure 1As shown, in some embodiments, the first heat exchange portion 200 includes three rows of first heat exchange tubes 210 , and the three rows of first heat exchange tubes 210 are formed with a plurality of first branch inlets 211 and a plurality of first branch outlets 212 .

[0080] The second heat exchange portion 300 includes three rows of second heat exchange tubes 310 , and the three rows of second heat exchange tubes 310 are formed with a plurality of second branch inlets 311 and a plurality of second branch outlets 312 .

[0081] In the reheat dehumidification mode, the refrigerant enters the first heat exchange part 200 through the first diverter 500 via multiple first branch inlets 211, flows out through multiple first branch outlets 212, and enters the first throttling element 400 through the second diverter 600. The throttled refrigerant enters the second heat exchange part 300 through the third diverter 700 via multiple second branch inlets 311, and flows out through multiple second branch outlets 312 through the fourth diverter 800.

[0082] Among them, when the air conditioner operates in the reheat dehumidification mode, the high-temperature refrigerant flowing out of the outdoor condenser passes through the outdoor electronic expansion valve and the first diverter 500 through multiple first branch inlets 211 into the first heat exchange part 200. When the high-temperature refrigerant passes through the three rows of first heat exchange tubes 210, the high-temperature refrigerant is evenly distributed to each first heat exchange tube 210 through the diversion effect of the first diverter 500. When the air flows through the first heat exchange part 200, this part of the air generates heat exchange with the first heat exchange part 200, thereby raising the temperature of this part of the air.

[0083] After heat exchange, the high-temperature refrigerant becomes low-temperature, low-pressure refrigerant. This low-temperature, low-pressure refrigerant flows out of the multiple first branch outlets 212, passes through the second flow divider 600, and flows into the first throttling element 400. After being throttled by the first throttling element 400, it passes through the third flow divider 700 and enters the second heat exchange tube 310 through the multiple second branch inlets 311. As the low-temperature, low-pressure refrigerant circulates within the second heat exchange tube 310, it cools and dehumidifies the air flowing through it. The cooled and dehumidified air is mixed with the heated air before being delivered out of the air conditioner. This creates an air supply pattern with a low moisture content and a temperature close to the inlet air temperature. This achieves dehumidification without cooling, effectively improving user comfort.

[0084] The low-temperature and low-pressure refrigerant after dehumidifying and cooling the air flows out through the multiple second branch outlets 312, flows to the outside through the fourth diverter 800, and finally flows back to the compressor of the air conditioner.

[0085] It should be noted that this example is applicable to 3.5Kw and 5Kw duct air conditioners with temperature control and dehumidification functions, that is, a three-row D5 heat exchanger V-shaped arrangement is adopted, and the upper and lower parts, namely the first heat exchange part 200 and the second heat exchange part 300, are symmetrically arranged, and a three-inlet and three-outlet flow path design is made in series. The middle first throttling element 400 is connected in series between the first heat exchange part 200 and the second heat exchange part 300, and the first throttling element 400 adopts a specially designed dehumidification electronic expansion valve, which is an electronic expansion valve with a large flow cross-sectional area.

[0086] Among them, the three-row D5 heat exchanger means that the number of rows of heat exchange tubes in the heat exchanger is three, that is, three rows of copper tubes (i.e. heat exchange tubes) are arranged horizontally, and D5 refers to the diameter of the copper tube.

[0087] like Figure 2 As shown, in some embodiments, the first heat exchange portion 200 includes two rows of third heat exchange tubes 220 , and the two rows of third heat exchange tubes 220 are formed with a plurality of third branch inlets 221 and a plurality of third branch outlets 222 .

[0088] Furthermore, the second heat exchange portion 300 includes two rows of fourth heat exchange tubes 320 , and the two rows of fourth heat exchange tubes 320 are formed with a plurality of fourth branch inlets 321 and a plurality of fourth branch outlets 322 .

[0089] In the reheat dehumidification mode, the refrigerant enters the first heat exchange part 200 through the fifth diverter 900 via multiple third branch inlets 221, flows out through multiple third branch outlets 222, and enters the first throttling element 400 through the sixth diverter 1000. The throttled refrigerant enters the second heat exchange part 300 through the seventh diverter 1100 via multiple fourth branch inlets 321, and flows out through multiple fourth branch outlets 322 through the eighth diverter 1200.

[0090] Among them, when the air conditioner operates in the reheat dehumidification mode, the high-temperature refrigerant flowing out of the outdoor condenser passes through the outdoor electronic expansion valve and the fifth diverter 900 through multiple third branch inlets 221 into the first heat exchange part 200. When the high-temperature refrigerant passes through the two rows of third heat exchange tubes 210, the high-temperature refrigerant is evenly distributed to each third heat exchange tube 220 through the diversion effect of the fifth diverter 900. When the air flows through the first heat exchange part 200, this part of the air generates heat exchange with the first heat exchange part 200, thereby raising the temperature of this part of the air.

[0091] After heat exchange, the high-temperature refrigerant becomes low-temperature, low-pressure refrigerant. This low-temperature, low-pressure refrigerant flows out of the multiple third branch outlets 222, passes through the sixth flow divider 1000, and flows into the first throttling element 400. After being throttled by the first throttling element 400, it passes through the seventh flow divider 1100 and enters the fourth heat exchange tube 320 through the multiple fourth branch inlets 321. As the low-temperature, low-pressure refrigerant circulates within the fourth heat exchange tube 320, it cools and dehumidifies the air flowing through it. The cooled and dehumidified air is mixed with the heated air before being delivered out of the air conditioner. This creates an air supply pattern with a low moisture content and a temperature close to the inlet air temperature. This achieves dehumidification without cooling, effectively improving user comfort.

[0092] The low-temperature and low-pressure refrigerant after dehumidifying and cooling the air flows out through the multiple fourth branch outlets 322, flows to the outdoors through the eighth diverter 1200, and finally flows back to the compressor of the air conditioner.

[0093] It should be noted that this example is applicable to 2.6Kw, 7.5Kw and 8.5Kw duct air conditioners with temperature control and dehumidification functions, that is, a double-row V-shaped layout is adopted, and the upper and lower parts, namely the first heat exchange part 200 and the second heat exchange part 300, are arranged symmetrically, and a three-inlet and three-outlet flow path design is made in series. The middle first throttling element 400 is connected in series between the first heat exchange part 200 and the second heat exchange part 300, and the first throttling element 400 adopts a specially designed dehumidification electronic expansion valve, which is an electronic expansion valve with a large flow cross-sectional area.

[0094] like Figure 1 and Figure 2 As shown, in some embodiments, the air conditioner also includes a heating mode and a cooling mode during operation.

[0095] In the heating mode, the first heat exchange part 200 and the second heat exchange part 300 are both used as condensers to heat and increase the temperature of the air flowing through the first heat exchange part 200 and the second heat exchange part 300 .

[0096] In the cooling mode, the first heat exchange part 200 and the second heat exchange part 300 both serve as evaporators to cool and dehumidify the air flowing through the first heat exchange part 200 and the second heat exchange part 300 .

[0097] It should be noted that no matter whether the air conditioner is operating in heating mode or cooling mode, the first throttling element 400 is in a fully open state to ensure smooth circulation of refrigerant between the first heat exchange part 200 and the second heat exchange part 300.

[0098] In some examples, reference Figure 1As shown, taking a ducted air conditioner with three rows of D5 heat exchangers arranged in a V-shape as an example, when the air conditioner operates in cooling mode, the first heat exchange part 200 and the second heat exchange part 300 are both used as evaporators.

[0099] The high-temperature refrigerant flowing out of the outdoor heat exchanger is throttled by the second throttling element (outdoor electronic expansion valve) to form a low-temperature, low-pressure liquid refrigerant. The low-temperature, low-pressure liquid refrigerant passes through the first diverter 500 and enters the first heat exchange section 200 through multiple first branch inlets 211. When passing through the three rows of first heat exchange tubes 210, the low-temperature, low-pressure liquid refrigerant is evenly distributed to each first heat exchange tube 210 due to the diversion effect of the first diverter 500. The low-temperature, low-pressure liquid refrigerant then flows out of multiple first branch outlets 212, passes through the second diverter 600, and flows into the first throttling element 400. The first throttling element 400 is in a fully open state to reduce the refrigerant saturation temperature drop.

[0100] The low-temperature and low-pressure liquid refrigerant passes through the third diverter 700 after being throttled by the first throttling element 400 , and enters the second heat exchange tube 310 through multiple second branch inlets 311 .

[0101] The low-temperature, low-pressure liquid refrigerant flowing through the first heat exchange tube 210 and the second heat exchange tube 310 will cool and dehumidify the air flowing through it. The low-temperature, low-pressure liquid refrigerant will become a low-temperature, low-pressure gaseous refrigerant and eventually flow out of the second heat exchange part 300 to complete the cooling process of the indoor air.

[0102] It should be noted that Figure 2 The process of the cooling mode of the double-row V-shaped duct air conditioner is similar to the cooling mode process of the above example, and will not be repeated here.

[0103] In some examples, reference Figure 1 As shown, taking a ducted air conditioner with three rows of D5 heat exchangers arranged in a V-shape as an example, when the air conditioner operates in cooling mode, the first heat exchange part 200 and the second heat exchange part 300 are both used as condensers.

[0104] The high-temperature and high-pressure refrigerant discharged from the outlet end of the compressor on the outdoor side of the air conditioner flows through the second heat exchange part 300, the first throttling element 400 and the first heat exchange part 200 in sequence to complete the heat exchange process with the indoor air. At the same time, the high-temperature and high-pressure refrigerant forms a low-temperature and low-pressure liquid refrigerant after flowing through the second throttling element (outdoor electronic expansion valve). After the low-temperature and low-pressure liquid refrigerant flows through the outdoor heat exchanger, it exchanges heat with the outdoor air to form a low-temperature gaseous refrigerant, and the low-temperature gaseous refrigerant flows back to the compressor.

[0105] It should be noted that Figure 2The process of the heating mode of the double-row V-shaped duct air conditioner is similar to the process of the heating mode in the above example, and will not be repeated here.

[0106] An exemplary embodiment of the present invention further provides an air conditioner 10 , which includes an indoor heat exchanger 11 , a four-way reversing valve 12 , an outdoor heat exchanger 13 , a second throttling element 14 , and a compressor 15 .

[0107] The indoor heat exchanger 11 is the heat exchanger 100 in any of the above embodiments, that is, the indoor heat exchanger 11 includes a first heat exchange part 200, a first throttling element 400 and a second heat exchange part 300 which are sequentially arranged in series.

[0108] The four-way reversing valve 12 is provided with a first port C, a second port D, a third port S and a fourth port E. The fourth port E is connected to the fourth diverter 800 or the eighth diverter 1200 in the indoor heat exchanger 11 through the air pipe 16 .

[0109] One end of the outdoor heat exchanger 13 is in communication with the first port C, and the other end of the outdoor heat exchanger 13 is in communication with one end of the second throttle element 14 .

[0110] The other end of the second throttling element 14 is connected to the first diverter 500 or the fifth diverter 900 in the indoor heat exchanger 11 through the liquid pipe 17 .

[0111] The inlet end of the compressor 15 is communicated with the third port S, and the outlet end of the compressor 15 is communicated with the second port D.

[0112] A first flow control valve 18 is provided between the second throttle element 14 and the indoor heat exchanger 11 , and a second flow control valve 19 is provided between the four-way reversing valve 12 and the indoor heat exchanger 11 .

[0113] The air conditioner 10 further includes a control device (not shown). The control device can coordinately control the operations of the outdoor heat exchanger 13, the second throttling element 14, the first flow control valve 18, the indoor heat exchanger 11, the second flow control valve 19, the four-way reversing valve 12, and the compressor 15 according to the operating mode of the air conditioner 10 and / or outdoor parameters and / or the thermal comfort requirements of the user, so as to adapt to the operating mode of the air conditioner 10 and / or outdoor parameters and / or the thermal comfort requirements of the user.

[0114] like Figures 1 to 3 As shown, the air conditioner of any of the above embodiments is a duct type air conditioner. The duct type air conditioner can be an integrated structure air conditioner, or can also be a split structure air conditioner.

[0115] The duct-type air conditioner in the above example includes a reheating and dehumidification mode, a cooling mode, and a heating mode during use.

[0116] Taking a ducted air conditioner with three rows of D5 heat exchangers arranged in a V shape as an example, when the air conditioner operates in a reheat dehumidification mode, the first heat exchange part 200 serves as a reheat condenser, and the second heat exchange part 300 serves as a reheat evaporator.

[0117] The high-temperature refrigerant flowing out of the outdoor heat exchanger 13 (used as a condenser) passes through the second throttling element 14 and the first diverter 500 and enters the first heat exchange part 200 through multiple first branch inlets 211. When the high-temperature refrigerant passes through the three rows of first heat exchange tubes 210, the high-temperature refrigerant is evenly distributed to each first heat exchange tube 210 through the diversion effect of the first diverter 500. When the air flows through the first heat exchange part 200, this part of the air generates heat exchange with the first heat exchange part 200, thereby increasing the temperature of this part of the air.

[0118] After heat exchange, the high-temperature refrigerant forms a low-temperature, low-pressure refrigerant. The low-temperature, low-pressure refrigerant flows out of the multiple first branch outlets 212, passes through the second diverter 600, and flows into the first throttling element 400. The first throttling element 400 is now fully open. After being throttled by the first throttling element 400, the refrigerant passes through the third diverter 700 and enters the second heat exchange tube 310 through the multiple second branch inlets 311. As the low-temperature, low-pressure refrigerant circulates within the second heat exchange tube 310, it cools and dehumidifies the air flowing through the second heat exchange tube 310. The cooled and dehumidified air is mixed with the heated air before being sent out of the air conditioner, forming an air supply mode with low moisture content and a temperature close to the inlet air temperature. This achieves the function of dehumidification without cooling, effectively improving the user's living comfort.

[0119] The low-temperature and low-pressure refrigerant after dehumidifying and cooling the air flows out through the multiple second branch outlets 312, flows to the outside through the fourth diverter 800, and finally flows back to the compressor 15 of the air conditioner.

[0120] When the air conditioner operates in cooling mode, the first heat exchanging portion 200 and the second heat exchanging portion 300 both function as evaporators, and the first throttle element 400 is in a fully open state.

[0121] The high-temperature refrigerant flowing out of the outdoor heat exchanger 13 is throttled by the second throttling element 14 (outdoor electronic expansion valve) to form a low-temperature, low-pressure liquid refrigerant. The low-temperature, low-pressure liquid refrigerant passes through the first diverter 500 and enters the first heat exchange section 200 through multiple first branch inlets 211. When passing through the three rows of first heat exchange tubes 210, the low-temperature, low-pressure liquid refrigerant is evenly distributed to each first heat exchange tube 210 due to the diversion effect of the first diverter 500. The low-temperature, low-pressure liquid refrigerant then flows out of the multiple first branch outlets 212, passes through the second diverter 600, and flows into the first throttling element 400. The first throttling element 400 is in a fully open state to reduce the refrigerant saturation temperature drop.

[0122] The low-temperature and low-pressure liquid refrigerant passes through the third diverter 700 after being throttled by the first throttling element 400 , and enters the second heat exchange tube 310 through multiple second branch inlets 311 .

[0123] The low-temperature, low-pressure liquid refrigerant flowing through the first heat exchange tube 210 and the second heat exchange tube 310 will cool and dehumidify the air flowing through it. The low-temperature, low-pressure liquid refrigerant will become a low-temperature, low-pressure gaseous refrigerant and eventually flow out of the second heat exchange part 300 to complete the cooling process of the indoor air.

[0124] When the air conditioner operates in cooling mode, the first heat exchanging portion 200 and the second heat exchanging portion 300 both function as condensers, and the first throttle element 400 is in a fully open state.

[0125] The high-temperature and high-pressure refrigerant discharged from the outlet end of the air conditioner's compressor 15 flows through the second heat exchange part 300, the first throttling element 400 and the first heat exchange part 200 in sequence to complete the heat exchange process with the indoor air. At the same time, the high-temperature and high-pressure refrigerant forms a low-temperature and low-pressure liquid refrigerant after flowing through the second throttling element 14 (outdoor electronic expansion valve). After the low-temperature and low-pressure liquid refrigerant flows through the outdoor heat exchanger, it exchanges heat with the outdoor air to form a low-temperature gaseous refrigerant. The low-temperature gaseous refrigerant flows back to the compressor 15 to complete the heating of the indoor air.

[0126] The ducted air conditioner in the above example can achieve optimal performance when operating in the reheat dehumidification mode without attenuating the conventional cooling and heating performance, through the structural design of the indoor heat exchanger 11.

[0127] Other embodiments of the present invention will readily occur to those skilled in the art after considering the specification and practicing the embodiments disclosed herein. This application is intended to cover any variations, uses, or adaptations of the present invention that follow the general principles of the present invention and include common knowledge or customary techniques in the art not disclosed herein. The specification and examples are to be considered as exemplary only, with the true scope and spirit of the present invention being indicated by the following claims.

[0128] It should be understood that the present invention is not limited to the precise structure described above and shown in the accompanying drawings, and various modifications and changes can be made without departing from the scope thereof. The scope of the present invention is limited only by the appended claims.

Claims

1. A heat exchanger used in an air conditioner having a reheat dehumidification mode, characterized in that: The heat exchanger includes: a first heat exchange part, a second heat exchange part and a first throttling element; The first heat exchange portion is configured to heat the air flowing through the first heat exchange portion in the reheat dehumidification mode; The second heat exchange unit is configured to cool and dehumidify the air flowing through the second heat exchange unit in the reheat dehumidification mode; Wherein, the ratio of the effective area of ​​the first heat exchange part and the air to the effective area of ​​the second heat exchange part and the air is between 0.2 and 2; The first throttling element is arranged in series between the first heat exchange part and the second heat exchange part.

2. The heat exchanger according to claim 1, characterized in that The ratio of the effective area of ​​the first heat exchange part and the air to the effective area of ​​the second heat exchange part and the air is between 0.8 and 1.

25.

3. The heat exchanger according to claim 1, characterized in that The first heat exchange portion and the second heat exchange portion are arranged relative to each other at a predetermined angle.

4. The heat exchanger according to claim 1, characterized in that The first heat exchange portion includes three rows of first heat exchange tubes, and the three rows of first heat exchange tubes are formed with a plurality of first branch inlets and a plurality of first branch outlets; and, the second heat exchange portion includes three rows of second heat exchange tubes, the three rows of second heat exchange tubes being formed with a plurality of second branch inlets and a plurality of second branch outlets; In the reheat dehumidification mode, the refrigerant enters the first heat exchange part through the first diverter through the multiple first branch inlets, flows out through the multiple first branch outlets, and then enters the first throttling element through the second diverter. The throttled refrigerant enters the second heat exchange part through the multiple second branch inlets through the third diverter, and flows out through the multiple second branch outlets through the fourth diverter.

5. The heat exchanger according to claim 1, characterized in that The first heat exchange portion includes two rows of third heat exchange tubes, and the two rows of third heat exchange tubes are formed with a plurality of third branch inlets and a plurality of third branch outlets; and, the second heat exchange portion comprises two rows of fourth heat exchange tubes, the two rows of fourth heat exchange tubes being formed with a plurality of fourth branch inlets and a plurality of fourth branch outlets; In the reheat dehumidification mode, the refrigerant enters the first heat exchange part through the fifth diverter via the multiple third branch inlets, flows out through the multiple third branch outlets, and enters the first throttling element through the sixth diverter. The throttled refrigerant enters the second heat exchange part through the multiple fourth branch inlets through the seventh diverter, and flows out through the multiple fourth branch outlets through the eighth diverter.

6. The heat exchanger according to claim 1, characterized in that The air conditioner also includes a heating mode and a cooling mode; In the heating mode, the first heat exchange portion and the second heat exchange portion both function as condensers; and In the cooling mode, the first heat exchange portion and the second heat exchange portion both function as evaporators; Wherein, in the heating mode and the cooling mode, the first throttling element is in a fully open state.

7. An air conditioner, characterized in that: The air conditioner includes an indoor heat exchanger, a four-way reversing valve, an outdoor heat exchanger, a second throttling element and a compressor; The indoor heat exchanger comprises the heat exchanger according to any one of claims 1 to 6; The four-way reversing valve is provided with a first port, a second port, a third port and a fourth port, and the fourth port is connected to the fourth diverter or the eighth diverter in the indoor heat exchanger through an air pipe; One end of the outdoor heat exchanger is in communication with the first port, and the other end of the outdoor heat exchanger is in communication with one end of the second throttling element; The other end of the second throttling element is connected to the first flow divider or the fifth flow divider in the indoor heat exchanger through a liquid pipe; The inlet end of the compressor is communicated with the third port, and the outlet end of the compressor is communicated with the second port.

8. The air conditioner according to claim 7, characterized in that A first flow control valve is provided between the second throttling element and the indoor heat exchanger; and A second flow control valve is provided between the four-way reversing valve and the indoor heat exchanger.

9. The air conditioner according to claim 8, characterized in that It also includes a control device, which can coordinately control the respective actions of the outdoor heat exchanger, the second throttling element, the first circulation control valve, the indoor heat exchanger, the second circulation control valve, the four-way reversing valve and the compressor according to the operating mode of the air conditioner and / or outdoor parameters and / or the thermal comfort requirements of the user, so as to adapt to the operating mode of the air conditioner and / or outdoor parameters and / or the thermal comfort requirements of the user.

10. The air conditioner according to any one of claims 7 to 9, characterized in that: The air conditioner is a duct type air conditioner.

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