Air conditioner indoor unit and duct type air conditioner

Abstract

The utility model provides an air conditioner indoor unit and a duct type air conditioner. The air conditioner indoor unit comprises a machine shell, a heat exchanger and an air return box. An air inlet and an air outlet are formed in the machine shell. The heat exchanger is located in the machine shell and is close to the air inlet, the heat exchanger comprises a first heat exchange part and a second heat exchange part, and an included angle is formed between the first heat exchange part and the second heat exchange part; a first channel and a second channel which are mutually independent are formed in the air return box, an inlet of the first channel and an inlet of the second channel are both formed in the bottom of the air return box, an outlet of the first channel communicates with the air inlet and faces the first heat exchange part, and an outlet of the second channel communicates with the air inlet and faces the second heat exchange part. According to the air conditioner indoor unit, part of return air flow can be guided to the first heat exchange part through the first channel, the other part of return air flow can be guided to the second heat exchange part through the second channel, the phenomenon of uneven flow distribution of a flow field is avoided, the uniformity of the flow field is effectively improved, and therefore the heat exchange uniformity of the air conditioner indoor unit is improved.

Description

Technical Field

[0001] The present application belongs to the technical field of air conditioning, and in particular relates to an air conditioning indoor unit and a duct unit. Background Art

[0002] Traditional ducted air conditioners are typically mounted on ceilings and use a traditional rear return air intake. This air intake method is limited by the operating environment and results in poor air quality. To address this, some existing ducted air conditioners incorporate a return air box and use a bottom return air intake. While this structure can improve the poor air quality of rear return air intake, due to the varying distances between different parts of the heat exchanger and the return air box's air inlet, more air flows to parts of the heat exchanger closer to the return air box's air inlet, resulting in uneven flow distribution and poor heat transfer uniformity. Utility Model Content

[0003] The embodiments of the present application provide an air conditioner indoor unit and a duct unit to solve the problem of poor heat exchange uniformity in existing duct units.

[0004] In the first aspect, an embodiment of the present application provides an air-conditioning indoor unit, which includes a casing, a heat exchanger and a return air box, and the casing is provided with an air inlet and an air outlet; the heat exchanger is located in the casing and is arranged close to the air inlet, and the heat exchanger includes a first heat exchange part and a second heat exchange part, and the first heat exchange part and the second heat exchange part are arranged at an angle; a first channel and a second channel independent of each other are formed in the return air box, and the inlet of the first channel and the inlet of the second channel are both arranged at the bottom of the return air box, the outlet of the first channel is connected with the air inlet and faces the first heat exchange part, and the outlet of the second channel is connected with the air inlet and faces the second heat exchange part.

[0005] Optionally, the heat exchange area of ​​the first heat exchange part is smaller than the heat exchange area of ​​the second heat exchange part, and the cross-sectional area of ​​the first channel is smaller than the cross-sectional area of ​​the second channel.

[0006] Optionally, the air inlet is arranged on the side wall of the casing, the first heat exchange part is closer to the top of the casing than the second heat exchange part, and the outlet width of the first channel is greater than the inlet width of the first channel.

[0007] Optionally, the width of the first channel gradually increases along the direction from the inlet of the first channel to the outlet of the first channel.

[0008] Optionally, the sidewalls of the first channel and the second channel are both arc-shaped structures.

[0009] Optionally, the return air box includes a first plate, a second plate, a third plate and a partition plate, the first plate, the second plate and the third plate enclose a return air channel, and the second plate and the third side plate are arranged opposite to each other; the first plate and the partition plate are both arc-shaped plates, the partition plate is arranged in the return air channel, and separates the return air channel into the first channel and the second channel.

[0010] Optionally, the first heat exchange part and the second heat exchange part are connected to form a V-shaped structure, and the opening of the V-shaped structure faces the air outlet.

[0011] Optionally, an air duct is provided in the casing, the air duct is connected to the air inlet and the air outlet, and the heat exchanger is arranged between the air inlet and the air duct; the air conditioner indoor unit also includes a fan, and the fan is arranged in the air duct.

[0012] Optionally, a return air channel is formed in the return air box, and the return air box includes a partition, which separates the return air channel into the first channel and the second channel; the partition extends to the heat exchanger at one end close to the air outlet and abuts the connection between the first heat exchange part and the second heat exchange part.

[0013] In a second aspect, an embodiment of the present application further provides an air conditioner, which includes the above-mentioned air conditioner indoor unit.

[0014] The air-conditioning indoor unit and duct unit provided in the embodiments of the present application form a first channel and a second channel that are independent of each other in the return air box, and the inlet of the first channel and the inlet of the second channel are both arranged at the bottom of the return air box, the outlet of the first channel is connected with the air inlet and faces the first heat exchange part, and the outlet of the second channel is connected with the air inlet and faces the second heat exchange part, so that part of the return air flow can be directed to the first heat exchange part through the first channel, and the other part of the return air flow can be directed to the second heat exchange part through the second channel, thereby avoiding the phenomenon of uneven flow distribution in the flow field, effectively improving the uniformity of the flow field, and thus improving the heat exchange uniformity of the air-conditioning indoor unit. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] To more clearly illustrate the technical solutions in the embodiments of this application, the following briefly introduces the drawings required for describing the embodiments. Obviously, the drawings described below are merely some embodiments of this application. Those skilled in the art can also derive other drawings based on these drawings without inventive effort. In the following description, the same reference numerals represent the same parts.

[0016] Figure 1 A schematic structural diagram of an air-conditioning indoor unit provided in an embodiment of the present application.

[0017] Figure 2 for Figure 1 Schematic diagram of air flow direction of the air conditioner indoor unit shown.

[0018] Figure 3 A comparison chart of the air volume and noise values ​​of the air conditioner indoor unit provided in the embodiment of the present application and the prior art.

[0019] Description of Figure Numbers:

[0020] 100. Casing; 101. Air inlet; 102. Air outlet; 103. Air duct; 200. Heat exchanger; 201. First heat exchange unit; 202. Second heat exchange unit; 300. Return air box; 301. First channel; 302. Second channel; 303. First plate; 304. Partition; 400. Fan. DETAILED DESCRIPTION

[0021] The following will be combined with the drawings in the embodiments of the present application to clearly and completely describe the technical solutions in the embodiments of the present application. Obviously, the embodiments described are only part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without making creative efforts are within the scope of protection of this application.

[0022] In the description of the present application, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as limiting the present application. In addition, the terms "first" and "second" are used for descriptive purposes only and cannot be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include one or more of the said features. In the description of the present application, "multiple" means two or more, unless otherwise clearly and specifically defined.

[0023] In this application, the word “exemplary” is used to mean “serving as an example, instance, or illustration.” Any embodiment described in this application as “exemplary” is not necessarily to be construed as preferred or advantageous over other embodiments.

[0024] The embodiment of the present application provides an air conditioner indoor unit, such as Figures 1 and 2As shown, the air-conditioning indoor unit includes a casing 100, a heat exchanger 200 and a return air box 300. The casing 100 is provided with an air inlet 101 and an air outlet 102; the heat exchanger 200 is located in the casing 100 and is arranged close to the air inlet 101. The heat exchanger 200 includes a first heat exchange part 201 and a second heat exchange part 202, and the first heat exchange part 201 and the second heat exchange part 202 are arranged at an angle; a first channel 301 and a second channel 302 independent of each other are formed in the return air box 300, and the inlet of the first channel 301 and the inlet of the second channel 302 are both arranged at the bottom of the return air box 300, the outlet of the first channel 301 is connected to the air inlet 101 and faces the first heat exchange part 201, and the outlet of the second channel 302 is connected to the air inlet 101 and faces the second heat exchange part 202.

[0025] The air-conditioning indoor unit provided in the embodiment of the present application forms a first channel 301 and a second channel 302 which are independent of each other in the return air box 300. The inlet of the first channel 301 and the inlet of the second channel 302 are both arranged at the bottom of the return air box 300. The outlet of the first channel 301 is connected with the air inlet 101 and faces the first heat exchange part 201. The outlet of the second channel 302 is connected with the air inlet 101 and faces the second heat exchange part 202. Therefore, part of the return air flow can be directed to the first heat exchange part 201 through the first channel 301, and the other part of the return air flow can be directed to the second heat exchange part 202 through the second channel 302, thereby avoiding the phenomenon of uneven flow distribution in the flow field, effectively improving the uniformity of the flow field, and thus improving the heat exchange uniformity of the air-conditioning indoor unit.

[0026] like Figure 1 As shown, an air duct 103 is provided in the housing 100, and the air duct 103 is connected to the air inlet 101 and the air outlet 102. The heat exchanger 200 is arranged between the air inlet 101 and the air duct 103. The air conditioner indoor unit also includes a fan 400, which is arranged in the air duct 103. Specifically, when the air conditioner indoor unit is in cooling or heating mode, the fan 400 is in operation, and the return air flow entering the housing 100 through the first channel 301 is subjected to heat exchange in the first heat exchange part 201. At the same time, the return air flow entering the housing 100 through the second channel 302 is subjected to heat exchange in the second heat exchange part 202. After the heat exchange, the two air flows are mixed in the housing 100, and then, under the action of the fan 400, enter the air duct 103 and are finally blown out from the air outlet 102.

[0027] In some embodiments of the present application, the first heat exchange portion 201 and the second heat exchange portion 202 are connected to form a V-shaped structure, and the opening of the V-shaped structure faces the air outlet 102 .

[0028] Optionally, the heat exchange area of ​​the first heat exchange section 201 is smaller than the heat exchange area of ​​the second heat exchange section 202, and the cross-sectional area of ​​the first channel 301 is smaller than the cross-sectional area of ​​the second channel 302. This application adjusts the cross-sectional areas of the first channel 301 and the second channel 302 accordingly based on the heat exchange areas of the first heat exchange section 201 and the second heat exchange section 202, so that the cross-sectional area of ​​the second channel 302 corresponding to the second heat exchange section 202 with a larger heat exchange area is larger than the cross-sectional area of ​​the first channel 301 corresponding to the first heat exchange section 201 with a smaller heat exchange area, thereby further improving the uniformity of the flow field and the heat exchange uniformity of the air conditioner indoor unit.

[0029] In some embodiments of the present application, the air inlet 101 is arranged on the side wall of the casing 100, the first heat exchange part 201 is closer to the top of the casing 100 relative to the second heat exchange part 202, and the outlet width of the first channel 301 is greater than the inlet width of the first channel 301 to form a pressure diffusion design. The pressure diffusion design can reduce the speed of the airflow flowing to the heat exchanger 200, thereby reducing the turbulence of the flow field and reducing the noise of the air conditioner indoor unit.

[0030] Optionally, the width of the first channel 301 gradually increases from the inlet of the first channel 301 to the outlet of the first channel 301 , so that the outlet width of the first channel 301 is greater than the inlet width of the first channel 301 .

[0031] In some embodiments of the present application, the side walls of the first channel 301 and the side walls of the second channel 302 are both arc-shaped structures. It is understandable that when the return air box 300 adopts a lower return air intake structure, compared with a rear return air intake structure, the return air flow inlet is farther away from the heat exchanger 200, and the flow resistance and loss increase, resulting in a large attenuation of the air volume. At the same time, there are more low-speed areas in the flow field and multiple vortex areas, resulting in high noise. To solve this problem, the present application sets the side walls of the first channel 301 and the side walls of the second channel 302 to arc-shaped structures. The arc-shaped channel side walls can reduce flow resistance and energy loss, thereby increasing air volume, while also reducing the low-speed areas in the flow field, thereby reducing the noise of the air conditioner indoor unit.

[0032] Optionally, the return air box 300 includes a first plate 303, a second plate, a third plate, and a partition plate 304. The first plate 303, the second plate, and the third plate enclose a return air channel (i.e., a return air channel is formed in the return air box 300), and the second plate and the third side plate are arranged opposite each other. The first plate 303 and the partition plate 304 are both curved plates. The partition plate 304 is arranged in the return air channel and divides the return air channel into the first channel 301 and the second channel 302. By arranging the first plate 303 and the partition plate 304 as curved plates, the side walls of the first channel 301 and the side walls of the second channel 302 are both curved structures.

[0033] Optionally, one end of the partition 304 near the air outlet 102 extends to the heat exchanger 200 and abuts the connection between the first heat exchange part 201 and the second heat exchange part 202. It is understandable that at the connection between the first heat exchange part 201 and the second heat exchange part 202, due to the different flow directions of the intake airflow, two high-speed airflows (i.e., the airflow flowing out of the first channel 301 and the airflow flowing out of the second channel 302) converge, exacerbating the flow field turbulence. The present application extends the partition 304 to abut against the connection between the two heat exchange parts to achieve forced separation of the airflows and avoid airflow interference (i.e., avoid interference between the airflow flowing out of the first channel 301 and the airflow flowing out of the second channel 302), thereby improving the flow field uniformity and improving the heat exchange uniformity; at the same time, it can also reduce the flow field turbulence and reduce noise.

[0034] See Table 1 and Figure 3 Table 1 is a comparison table of the air volume and noise values ​​of the air conditioner indoor unit of this embodiment and the prior art. Figure 3 The figure shows the comparison of the air volume and noise value of the air conditioner indoor unit of this embodiment and the prior art. As can be seen from Table 1, the air volume of the air conditioner indoor unit of this embodiment is improved and the noise value is reduced by optimizing the structure of the return air box 300; Figure 3 It can be seen that compared with the prior art, the noise of the air conditioner indoor unit of this embodiment is significantly reduced under the same air volume.

[0035] Table 1

[0036]

[0037] The present application also provides a ducted air conditioner, which includes an air conditioner indoor unit. The specific structure of the air conditioner indoor unit is similar to that of the above embodiments. Since the present ducted air conditioner adopts all the technical solutions of all the above embodiments, it has at least all the beneficial effects brought about by the technical solutions of the above embodiments, which will not be detailed here.

[0038] In the above embodiments, the description of each embodiment has its own focus. For parts that are not described in detail in a certain embodiment, reference can be made to the relevant descriptions of other embodiments.

[0039] The above is a detailed introduction to the air-conditioning indoor unit and duct unit provided in the embodiments of the present application. Specific examples are used herein to illustrate the principles and implementation methods of the present application. The description of the above embodiments is only used to help understand the method and core idea of ​​the present application. At the same time, for technical personnel in this field, based on the ideas of the present application, there will be changes in the specific implementation methods and application scope. In summary, the content of this specification should not be understood as a limitation on the present application.

Claims

1. An air conditioner indoor unit, characterized in that: include: A housing (100), wherein the housing (100) is provided with an air inlet (101) and an air outlet (102); A heat exchanger (200) is located in the housing (100) and is disposed near the air inlet (101), the heat exchanger (200) comprising a first heat exchange portion (201) and a second heat exchange portion (202), the first heat exchange portion (201) and the second heat exchange portion (202) being disposed at an angle; A return air box (300) is provided, wherein a first channel (301) and a second channel (302) are formed independently of each other, an inlet of the first channel (301) and an inlet of the second channel (302) are both arranged at the bottom of the return air box (300), an outlet of the first channel (301) is communicated with the air inlet (101) and faces the first heat exchange part (201), and an outlet of the second channel (302) is communicated with the air inlet (101) and faces the second heat exchange part (202).

2. The air conditioner indoor unit according to claim 1, characterized in that: The heat exchange area of ​​the first heat exchange portion (201) is smaller than the heat exchange area of ​​the second heat exchange portion (202), and the cross-sectional area of ​​the first channel (301) is smaller than the cross-sectional area of ​​the second channel (302).

3. The air conditioner indoor unit according to claim 1, characterized in that: The air inlet (101) is arranged on the side wall of the casing (100), the first heat exchange part (201) is closer to the top of the casing (100) than the second heat exchange part (202), and the outlet width of the first channel (301) is greater than the inlet width of the first channel (301).

4. The air conditioner indoor unit according to claim 3, characterized in that: Along the direction from the inlet of the first channel (301) to the outlet of the first channel (301), the width of the first channel (301) gradually increases.

5. The air conditioner indoor unit according to claim 1, characterized in that: The side wall of the first channel (301) and the side wall of the second channel (302) are both arc-shaped structures.

6. The air conditioner indoor unit according to claim 5, characterized in that: The return air box (300) comprises a first plate (303), a second plate, a third plate and a partition plate (304); the first plate (303), the second plate and the third plate enclose a return air channel; the second plate and the third plate are arranged opposite to each other; The first plate (303) and the partition plate (304) are both arc-shaped plates. The partition plate (304) is arranged in the return air channel and divides the return air channel into the first channel (301) and the second channel (302).

7. The air conditioner indoor unit according to claim 1, characterized in that: The first heat exchange portion (201) and the second heat exchange portion (202) are connected to form a V-shaped structure, and the opening of the V-shaped structure faces the air outlet (102).

8. The air conditioner indoor unit according to claim 1, characterized in that: An air duct (103) is provided in the casing (100), the air duct (103) is communicated with the air inlet (101) and the air outlet (102), and the heat exchanger (200) is arranged between the air inlet (101) and the air duct (103); the air conditioner indoor unit also includes a fan (400), and the fan (400) is arranged in the air duct (103).

9. The air conditioner indoor unit according to any one of claims 1 to 8, characterized in that: A return air channel is formed in the return air box (300), and the return air box (300) includes a partition (304), and the partition (304) divides the return air channel into the first channel (301) and the second channel (302); One end of the partition plate (304) close to the air outlet (102) extends to the heat exchanger (200) and abuts against the connection between the first heat exchange part (201) and the second heat exchange part (202).

10. A duct machine, characterized in that: The duct unit includes the air conditioner indoor unit according to any one of claims 1 to 9.

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