Indoor unit of air conditioner

Abstract

The invention relates to the technical field of air conditioning, and discloses an air conditioner indoor unit which comprises a shell and an air duct assembly, and the shell is provided with a containing space; the air duct assembly is arranged in the containing space, an air outlet duct is defined by the air duct assembly, and an air outlet is defined by the first end of the air outlet duct; the air duct assembly comprises a lower air duct plate, the lower air duct plate comprises a first plate body and a second plate body which are sequentially arranged in the air flowing direction, and the second plate body is located outside the extension line of the first plate body in the air outlet direction. By means of the air conditioner indoor unit, the condensation phenomenon in the air outlet duct can be reduced.

Description

Technical Field

[0001] This application relates to the technical field of air conditioning, for example, to an indoor air conditioner. Background Art

[0002] When the air conditioner operates in the cooling mode, condensation will form at the air outlet. This not only easily breeds bacteria, but also the dripping water will affect the cleanliness of the indoor environment.

[0003] In order to reduce the condensation of the air conditioner during cooling, a related art discloses an indoor air conditioner, including a housing provided with an air outlet and an anti-condensation device arranged along the circumference of the air outlet. The anti-condensation device includes: a heat exchange pipe filled with a liquid heat exchange medium inside, and at least a part of the pipe section is arranged along the circumference of the air outlet on the inner side wall of the housing; a heating component sleeved outside the heat exchange pipe far from the air outlet for heating the heat exchange medium; a power component arranged inside the housing and forming a circulation loop of the heat exchange medium with the heat exchange pipe for driving the heated heat exchange medium to flow to realize heat exchange with the housing around the air outlet. In the case of the indoor air conditioner operating in the cooling mode, the heat exchange between the housing around the air outlet and the surrounding environment is reduced, so that it is not easy for air to condense on the housing around the air outlet. In the process of implementing the embodiments of the present disclosure, it is found that there are at least the following problems in the related art:

[0004] By increasing the temperature of the housing through the heating component, the condensation outside the housing can be reduced, but there is still air flowing out inside the air outlet, and the anti-condensation effect of the air conditioner needs to be further improved.

[0005] It should be noted that the information disclosed in the above background art section is only used to enhance the understanding of the background of the present application, and thus may include information that does not constitute the prior art known to those of ordinary skill in the art. Summary of the Invention

[0006] To have a basic understanding of some aspects of the disclosed embodiments, a simple summary is given below. This summary is not a general review, nor is it intended to identify key / important elements or delineate the protection scope of these embodiments, but rather serves as a preface to the subsequent detailed description.

[0007] The embodiments of the present disclosure provide an indoor air conditioner to improve the anti-condensation effect of the air conditioner.

[0008] In some embodiments, the indoor air conditioner includes a housing and an air duct assembly. Among them, the housing is configured with an accommodation space; the air duct assembly is arranged in the accommodation space, and the air duct assembly defines an air outlet duct, and the first end of the air outlet duct defines an air outlet; among them, the air duct assembly includes: a lower air duct plate including a first plate body and a second plate body arranged in sequence along the air flow direction, and the second plate body is located outside the extension line of the first plate body along the air outlet direction.

[0009] In some embodiments, a ridge line is formed at the connection position of the first plate body and the second plate body, and a first included angle between the first plate body and the second plate body at the ridge line position is less than or equal to 150 degrees.

[0010] In some embodiments, a step is formed at the connection position of the first plate body and the second plate body, and the first plate body is higher than the second plate body.

[0011] In some embodiments, the first plate body overlaps on one side of the second plate body facing the air duct to form the step.

[0012] In some embodiments, the first plate body is configured with a bending portion to form the step.

[0013] In some embodiments, the second plate body is configured with a bending portion to form the step.

[0014] In some embodiments, the second plate body is configured with a first groove along the width direction, and the bottom of the first groove is away from the air outlet path of the air outlet duct.

[0015] In some embodiments, the cross-section of the second plate body is arc-shaped to form the first groove.

[0016] In some embodiments, the indoor air conditioner further includes a connecting plate and a bottom plate. Among them, the connecting plate is vertically arranged, and the top end of the connecting plate is connected to the outer end of the second plate body; the bottom plate is horizontally arranged, and the front end of the bottom plate is connected to the bottom end of the connecting plate.

[0017] In some embodiments, the connecting plate is provided with jet holes, and when the air outlet duct discharges air, it drives the indoor air to flow into the air outlet of the air outlet duct through the jet holes.

[0018] In some embodiments, the bottom plate is provided with air guiding holes; the indoor air conditioner further includes a jet pipe, the jet pipe has a first end and a second end, the first end of the jet pipe communicates with the jet holes, and the second end of the jet pipe communicates with the air guiding holes.

[0019] In some embodiments, the lower air duct plate is provided with a first heat insulation strip to reduce the heat transfer between the first plate body and the second plate body.

[0020] The indoor air conditioner provided by the embodiments of the present disclosure can achieve the following technical effects:

[0021] Using the air conditioner indoor unit provided by the embodiments of the present disclosure, on the one hand, the heat convection between the cold air and the second plate body during air conditioner refrigeration can be reduced, and on the other hand, the heat exchange between the indoor air and the second plate body can be increased. When the air conditioner operates in the refrigeration mode, the temperature of the second plate body is not easily reduced to the dew point temperature, reducing the condensation formed in the air outlet duct.

[0022] The above general description and the following description are only exemplary and explanatory, and are not used to limit the present application. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] One or more embodiments are exemplarily illustrated by corresponding drawings. These exemplary illustrations and the drawings do not constitute limitations on the embodiments. Elements with the same reference numerals in the drawings are shown as similar elements. The drawings do not constitute a proportional limitation, and among them:

[0024] Figure 1 is a schematic structural diagram of an air conditioner indoor unit provided by an embodiment of the present disclosure;

[0025] Figure 2 is one provided by an embodiment of the present disclosure Figure 1 is an enlarged schematic view of part A in;

[0026] Figure 3 is another one provided by an embodiment of the present disclosure Figure 1 is an enlarged schematic view of part A in;

[0027] Figure 4 is another one provided by an embodiment of the present disclosure Figure 1 is an enlarged schematic view of part A in;

[0028] Figure 5 is another one provided by an embodiment of the present disclosure Figure 1 is an enlarged schematic view of part A in;

[0029] Figure 6 is another one provided by an embodiment of the present disclosure Figure 1 is an enlarged schematic view of part A in;

[0030] Figure 7 is another one provided by an embodiment of the present disclosure Figure 1 is an enlarged schematic view of part A in;

[0031] Figure 8 is a schematic structural diagram of the lower air duct plate of an air conditioner provided by an embodiment of the present disclosure.

[0032] Reference numerals:

[0033] 100: Housing; 200: Air duct assembly; 300: Lower air duct plate; 310: First plate body; 311: Second groove; 320: Second plate body; 321: First groove; 400: Connecting plate; 410: Jet hole; 500: Bottom plate; 510: Air guiding hole; 600: Jet pipe; 710: First heat insulation strip; 720: Second heat insulation strip; 730: Third heat insulation strip; 810: First contact electrode; 820: Second contact electrode. Detailed implementation manners

[0034] In order to be able to understand the features and technical content of the embodiments of the present disclosure in more detail, the implementation of the embodiments of the present disclosure will be described in detail below with reference to the accompanying drawings. The accompanying drawings are only for reference and explanation purposes and are not used to limit the embodiments of the present disclosure. In the following technical description, for the sake of explanation, multiple details are provided to provide a full understanding of the disclosed embodiments. However, one or more embodiments can still be implemented without these details. In other cases, well-known structures and devices can be shown in a simplified manner to simplify the drawings.

[0035] In the embodiments of the present disclosure, the terms "first", "second", etc. in the specification, claims and the above-mentioned drawings are used to distinguish similar objects and do not necessarily have to be used to describe a specific order or sequence. It should be understood that such data can be interchanged under appropriate circumstances. In addition, the terms "comprising" and "having" and any variations thereof are intended to cover non-exclusive inclusion.

[0036] In the embodiments of the present disclosure, the orientation or positional relationship indicated by the terms "upper", "lower", "inner", "middle", "outer", "front", "rear", etc. is based on the orientation or positional relationship shown in the accompanying drawings. These terms are mainly used to better describe the embodiments of the present disclosure and their embodiments, and are not used to limit that the indicated devices, elements or components must have a specific orientation or be constructed and operated in a specific orientation. And, in addition to being able to represent an orientation or positional relationship, some of the above terms may also be used to represent other meanings. For example, the term "upper" may also be used to represent a certain attachment relationship or connection relationship in some cases. For those of ordinary skill in the art, the specific meanings of these terms in the embodiments of the present disclosure can be understood according to specific circumstances.

[0037] In addition, the terms "arranged", "connected", "fixed" should be understood in a broad sense. For example, "connected" can be a fixed connection, a detachable connection, or an integral structure; it can be a mechanical connection or an electrical connection; it can be directly connected, or indirectly connected through an intermediate medium, or there is an internal connection between two devices, elements or components. For those of ordinary skill in the art, the specific meanings of the above terms in the embodiments of the present disclosure can be understood according to specific circumstances.

[0038] Unless otherwise specified, the term "a plurality of" means two or more.

[0039] In the embodiments of the present disclosure, the character " / " indicates that the objects before and after are in an "or" relationship. For example, A / B means: A or B.

[0040] The term "and / or" is an associative relationship describing an object, indicating that there can be three relationships. For example, A and / or B means: A or B, or, the three relationships of A and B.

[0041] It should be noted that, without conflict, the embodiments in the embodiments of the present disclosure and the features in the embodiments can be combined with each other.

[0042] When the air conditioner is operating, air blows out from the air outlet. On the air outlet path of the indoor unit of the air conditioner, the air flow rate is relatively fast. At a position close to the air outlet, a part of the indoor air will be drawn into the air outlet duct of the air conditioner.

[0043] When the air conditioner is operating in the cooling mode, the temperature of the inner wall of the duct is relatively low. The water vapor carried by the indoor air drawn into the air outlet duct comes into contact with the inner wall of the air outlet duct. When the temperature of the inner wall of the duct is lower than the dew point temperature, the water vapor in the air will condense on the inner wall of the duct. The water droplets condensed on the inner wall of the duct gather and slide to the air outlet, and after converging with the condensation formed outside the air conditioner, it is easily considered as the condensation caused by the relatively low temperature of the housing, or considered as the condensation formed inside the housing because the water vapor in the air entering the indoor unit of the air conditioner is not completely captured by the evaporator.

[0044] In order to reduce the condensation generated in the duct, the indoor unit of the air conditioner provided in the embodiments of the present disclosure reduces the heat convection between the cold air and the inner wall of the duct to reduce the condensation formed by the contact between the indoor air and the inside of the duct.

[0045] Combined Figure 1-8 As shown, the indoor unit of the air conditioner includes a housing 100 and a duct assembly 200. Among them, the housing 100 is configured with a receiving space; the duct assembly 200 is disposed in the receiving space, and the duct assembly 200 defines an air outlet duct, and the first end of the air outlet duct defines an air outlet; among them, the duct assembly 200 includes: a lower duct plate 300, which includes a first plate body 310 and a second plate body 320 arranged in sequence along the air flow direction, and the second plate body 320 of which is located outside the extension line of the first plate body 310 along the air outlet direction.

[0046] The indoor unit of the air conditioner provided in the embodiments of the present disclosure includes a housing 100 and a duct assembly 200, and the duct assembly 200 is disposed in the housing 100 to receive air. In some cases, the duct assembly 200 can be a separately provided duct plate or a chassis integrally provided with a water receiving tray.

[0047] The air outlet duct of the air duct assembly 200 is used to guide the air that has exchanged heat with the heat exchanger of the air conditioner indoor unit to the indoor environment. In some cases, part of the structure of the air duct assembly 200 also serves as the volute tongue and / or part of the volute of the cross-flow fan of the air conditioner indoor unit.

[0048] The air duct assembly 200 includes a lower air duct plate 300. The lower air duct plate 300 is in terms of the wall-mounted air conditioner indoor unit in the use state. The air duct assembly 200 may include an upper air duct plate, a lower air duct plate 300 arranged oppositely, and left and right side plates for connecting the upper air duct plate and the lower air duct plate 300.

[0049] The lower air duct plate 300 includes a first plate body 310 and a second plate body 320. When the air conditioner indoor unit blows air, the air flows through the first plate body 310 and the second plate body 320 in sequence. That is, the first plate body 310 is an inner part of the lower air duct plate 300, and the second plate body 320 is an outer part of the lower air duct plate 300. When the air conditioner operates in the cooling mode, the second plate body 320 is also the part that is easy to have heat convection with the indoor air.

[0050] Generally speaking, the lower air duct plate 300 has a continuous and smooth profile to achieve a better guiding effect on the air. This also causes the air that has exchanged heat with the heat exchanger to have heat convection with each position of the lower air duct plate 300. In the air conditioner indoor unit provided by the embodiments of the present disclosure, the lower air duct plate 300 is divided into two parts, namely a first plate body 310 and a second plate body 320. The second plate body 320 is located outside the extension line of the first plate body 310 along the air outlet direction, that is, the second plate body 320 is farther from the air outlet path than the first plate body 310. When the air conditioner indoor unit blows cold air, the air flows outward along the second plate body 320 and separates at the junction of the first plate body 310 and the second plate body 320. This can reduce the heat convection between the cold air and the second plate body 320, thereby reducing the situation where the inner wall temperature of the second plate body 320 drops below the dew condensation temperature. The temperature of the second plate body 320 is relatively high, and it is not easy for the indoor air to form dew condensation on the surface of the second plate body 320 after being involved in the air outlet duct. In addition, the second plate body 320 is located outside the extension line of the first plate body 310 along the air outlet direction. When the air conditioner indoor unit blows air, a negative pressure area will be formed near the second plate body 320. In this way, more indoor air will exchange heat with the second plate body 320, thereby reducing the temperature drop of the second plate body 320 and further reducing the dew condensation generated on the second plate body 320.

[0051] Using the air conditioner indoor unit provided by the embodiments of the present disclosure, on the one hand, it can reduce the heat convection between the cold air and the second plate body 320 during air conditioner cooling, and on the other hand, it can increase the heat exchange between the indoor air and the second plate body 320. When the air conditioner operates in the cooling mode, the temperature of the second plate body 320 is not easy to drop to the dew point temperature, reducing the dew condensation formed in the air outlet duct.

[0052] Optionally, a ridge line is formed at the connection position of the first plate body 310 and the second plate body 320, and the first included angle of the first plate body 310 and the second plate body 320 at the ridge line position is less than or equal to 150 degrees.

[0053] If the transition between the first plate body 310 and the second plate body 320 is relatively smooth, when the air conditioner operates in the cooling mode, some cold air may still undergo convective heat transfer with the second plate body 320 under the action of wall attachment. A ridge line is formed at the connection position of the first plate body 310 and the second plate body 320, which is beneficial for the cold air to separate from the lower air duct plate 300 in advance.

[0054] Furthermore, the included angle of the first plate body 310 and the second plate body 320 at the ridge line position is less than or equal to 150 degrees, which can further reduce the situation of cold air flowing towards the second plate body 320.

[0055] Optionally, a step is formed at the connection position of the first plate body 310 and the second plate body 320, and the first plate body 310 is higher than the second plate body 320.

[0056] A step is formed at the connection position of the first plate body 310 and the second plate body 320. At the step position, the air moving along the first plate body 310 is not easily to flow to the second plate body 320. Adopting such a setting form can further reduce the convective heat transfer between the cold air and the second plate body 320, thereby reducing the condensation inside the air outlet duct.

[0057] Optionally, the first plate body 310 overlaps the side of the second plate body 320 facing the air duct to form a step.

[0058] The first plate body 310 and the second plate body 320 adopt an overlapping form, which can not only improve the airtightness of the air duct, but also form a step at the connection position of the first plate body 310 and the second plate body 320, reducing the forming difficulty of the air duct assembly 200.

[0059] Optionally, the first plate body 310 is configured with a bent portion to form a step.

[0060] The first plate body 310 is bent to form a step, reducing the forming difficulty of the step.

[0061] Optionally, the second plate body 320 is configured with a bent portion to form a step.

[0062] The second plate body 320 is bent to form a step, reducing the forming difficulty of the step.

[0063] Optionally, the first plate body 310 and the second plate body 320 are integrally formed.

[0064] Adopting such a setting form can reduce the cost of the lower air duct plate 300 and improve the airtightness of the air outlet duct.

[0065] Optionally, the second plate body 320 is configured with a first groove 321 in the width direction, and the bottom of the first groove 321 is far from the air outlet path of the air outlet duct.

[0066] Taking the wall-mounted air conditioner indoor unit in the use state and the user facing the air conditioner indoor unit directly as an example, the left-right direction of the air conditioner indoor unit is the width direction. The second plate body 320 is provided with a first groove 321 in the width direction, and the bottom of the first groove 321 is far from the air outlet path of the air outlet duct. When the air conditioner indoor unit blows air, it is not easy for the air to enter the first groove 321 when flowing along the surface of the first plate body 310, thus reducing the heat convection between the cold air and the second plate body 320.

[0067] In addition, the second plate body 320 is configured with a first groove 321, and the distance between the end of the second plate body 320 connected to the first plate body 310 and the end not connected to the first plate body 310 deviating from the air outlet path is relatively small, so that the size of the air outlet of the air conditioner indoor unit presented to the user can be minimized, improving the aesthetics of the air conditioner indoor unit.

[0068] Optionally, the first plate body 310 is configured with a second groove 311 in the width direction, and the bottom of the second groove 311 is far from the air outlet path of the air outlet duct.

[0069] When the air flows along the surface of the first plate body 310, a part of the air enters the second groove 311 and will deflect along the wall surface of the second groove 311 in a direction away from the second plate body 320. By adopting such a setting form, the heat convection between the cold air and the second plate body 320 can be further reduced, thereby reducing the condensation of the air outlet duct.

[0070] Optionally, the inner end of the second groove 311 is smoothly butted with the surface of the first plate body 310.

[0071] In this way, more air can be introduced into the second groove 311, and the air will move away from the second plate body 320 under the action of inertia.

[0072] Optionally, the outer end of the second groove 311 forms a ridge line with the surface of the first plate body 310.

[0073] This is beneficial to the air separating from the first plate body 310 in advance, thereby reducing the heat convection between the air and the second plate body 320.

[0074] Optionally, the outer end of the second groove 311 forms a second included angle with the surface of the first plate body 310, and the second included angle is less than or equal to 150 degrees.

[0075] This can improve the separation effect of the air from the first plate body 310.

[0076] Optionally, the cross-section of the second plate body 320 is arc-shaped to form a first groove 321.

[0077] With such a setting form, the shape of the second plate body 320 can be made more smooth, which can not only reduce the cost of the second plate body 320 for constructing the first groove 321, but also improve the aesthetics of the air conditioner indoor unit.

[0078] Optionally, the air conditioner indoor unit further includes a connecting plate 400 and a bottom plate 500. Among them, the connecting plate 400 is arranged vertically, and the top end of the connecting plate 400 is connected to the outer end of the second plate body 320; the bottom plate 500 is arranged horizontally, and the front end of the bottom plate 500 is connected to the bottom end of the connecting plate 400.

[0079] The connecting plate 400 can be a part of the air duct assembly 200 or a part of the housing 100.

[0080] The top end of the connecting plate 400 is connected to the outer end of the second plate body 320. When the air conditioner indoor unit blows air, the connecting plate 400 can block a part of the indoor air from entering the air outlet duct, thereby reducing the amount of indoor high-humidity air entering the air outlet duct.

[0081] The bottom plate 500 is arranged horizontally and jointly wraps the second plate body 320 with the connecting plate 400. This can prevent the indoor air from contacting the outer surface of the second plate body 320, thereby reducing the condensation outside the air duct assembly 200.

[0082] Optionally, the connecting plate 400 is provided with a jet hole 410, and when the air outlet duct blows air, it drives the indoor air to converge into the air outlet of the air outlet duct through the jet hole 410.

[0083] When the air conditioner indoor unit blows air, a negative pressure will be formed near the air outlet. By providing a jet hole 410 in the connecting plate 400, a part of the indoor air will converge into the air outlet of the air conditioner through the jet hole 410. This can make the air flow near the air outlet more orderly, reduce the trailing vortex turbulence, and thus reduce the amount of indoor air drawn into the air outlet duct. With such a setting form, the condensation inside the air outlet duct can be reduced by reducing the indoor air drawn into the air outlet duct.

[0084] Optionally, the bottom plate 500 is provided with an air guiding hole 510; the air conditioner indoor unit further includes a jet pipe 600, the jet pipe 600 has a first end and a second end, the first end of the jet pipe 600 communicates with the jet hole 410, and the second end of the jet pipe communicates with the air guiding hole 510.

[0085] An air intake hole 510 is formed in the bottom plate 500, and indoor air located below the air conditioner indoor unit can be introduced into the air outlet of the air conditioner through the jet pipe 600. For a wall-mounted air conditioner indoor unit, there is a relatively large space below the air conditioner indoor unit when the air conditioner indoor unit blows air, so the indoor air comes into contact with the lower air duct plate 300 of the air duct assembly 200 more. The jet pipe 600 introduces the indoor air below the hole bottom plate 500 into the air outlet of the air conditioner, which can make the flow of the indoor air and the air outlet of the air conditioner more orderly when the air conditioner indoor unit blows air, thereby reducing the amount of indoor air drawn into the air outlet duct. By adopting such a setting form, the anti-condensation effect of the air conditioner can be further improved.

[0086] Optionally, the second plate body 320 is provided with a first heat insulation strip 710 to reduce the heat transfer between the first plate body 310 and the second plate body 320.

[0087] By providing the first heat insulation strip 710 on the lower air duct plate 300, the heat transfer between the first plate body 310 and the second plate body 320 can be blocked, thereby reducing or avoiding the temperature of the second plate body 320 dropping below the condensation temperature. When the air conditioner indoor unit blows cold air, even if the indoor air is drawn into the air outlet duct, the indoor air is not likely to condense on the surface of the second plate body 320.

[0088] By using the air conditioner indoor unit provided by the embodiments of the present disclosure, the degree of temperature drop of the second plate body 320 can be reduced by reducing the heat transfer between the first plate body 310 and the second plate body 320, thereby reducing the condensation generated by the contact between the indoor air and the second plate body 320.

[0089] Optionally, the first heat insulation strip 710 is arranged at the connection position of the first plate body 310 and the second plate body 320.

[0090] The first heat insulation strip 710 is arranged on the second plate body 320 and is located at the connection position of the first plate body 310 and the second plate body 320. As a preferred embodiment, the first heat insulation strip 710 also serves as a structural member for connecting the first plate body 310 and the second plate body 320 which are arranged in sections. By adopting such a setting form, it is beneficial to the processing and forming of the lower air duct plate 300, and is also beneficial to reducing or isolating the heat transfer between the first plate body 310 and the second plate body 320.

[0091] Optionally, the first heat insulation strip 710 protrudes towards the air outlet duct. The first end of the first heat insulation strip 710 is smoothly butted with the first plate body 310, and the second end of the first heat insulation strip 710 forms a step with the second plate body 320.

[0092] The first heat insulation strip 710 is arranged along the width direction of the air outlet. The width direction is the left-right direction when the user faces the air conditioner indoor unit in the use state of the wall-mounted air conditioner indoor unit. Arranging the first heat insulation strip 710 along the width direction of the air outlet can improve the heat insulation effect of the first heat insulation strip 710.

[0093] Along the air outlet direction, one long side of the first heat insulation strip 710 close to the interior of the air conditioner is the first end of the first heat insulation strip 710, and one long side of the first heat insulation strip 710 away from the interior of the air conditioner is the second end of the first heat insulation strip 710.

[0094] The first heat insulation strip 710 protrudes. When the cold air flows along the plate surface of the first plate body 310 to the first heat insulation strip 710, it will move along the surface of the first heat insulation strip 710. Since the second end of the first heat insulation strip 710 forms a step with the second plate body 320, under the action of inertia, the air does not flow along the surface of the second plate body 320. With such a setting form, on the one hand, the heat convection between the cold air and the second plate body 320 can be reduced, thereby reducing the temperature drop of the second plate body 320; on the other hand, a small negative pressure area will be formed near the step position, so that more indoor air can be drawn into the air outlet duct and conduct heat convection with the second plate body 320. Through the above two aspects, the temperature of the second plate body 320 drops less, thereby reducing or avoiding the formation of condensation on the surface of the second plate body 320.

[0095] Optionally, the indoor unit of the air conditioner further includes a second heat insulation strip 720, and the second heat insulation strip 720 is arranged on the second plate body 320 to reduce the heat transfer between the first part and the second part of the second plate body 320; wherein, the first part of the second plate body 320 and the second part of the second plate body 320 are spliced through the second heat insulation strip 720.

[0096] The second heat insulation strip 720 is arranged on the second plate body 320 along the width direction of the indoor unit of the air conditioner. The two sides of the second heat insulation strip 720 are respectively the first part and the second part of the plate body, and the first part is located on the inner side and the second part is located on the outer side.

[0097] Arranging the second heat insulation strip 720 can reduce the heat transfer between the first part and the second part of the second plate body 320. This can reduce the temperature drop of the second part of the second plate body 320 and thus reduce the condensation generated on the second part of the plate body.

[0098] In addition, the first part and the second part of the second plate body 320 are spliced through the heat insulation strip, which reduces the heat transfer contact area between the first part and the second part of the second plate body 320, thereby improving the heat transfer effect of the second heat insulation strip 720 between the first part and the second part of the second plate body 320. When the lower air duct plate 300 deforms under the action of thermal expansion and contraction, the second heat insulation strip 720 uses a deformable material and also serves as a buffer energy absorption structure to reduce the abnormal noise caused by the deformation of the lower air duct plate 300, and enables both the first part and the second part of the second plate body 320 to be better maintained in the initial installation position.

[0099] It should be noted that when the first heat insulation strip 710 and the second heat insulation strip 720 are simultaneously arranged on the lower air duct plate 300, there are two heat insulation settings between the first plate body 310 and the second part of the second plate body 320, and it is not easy for the temperature of the second part of the second plate body 320 to drop to the dew point temperature. In this way, the anti-condensation effect of the air conditioner can be further improved.

[0100] Optionally, the first part of the first plate body 310 and the second plate body 320 is an integral structure.

[0101] As a implementation method, the lower air duct plate 300 is provided with a heat insulation strip installation groove, and the first heat insulation strip 710 is embedded in the heat insulation strip installation groove. On both sides of the first heat insulation strip 710 along the air outlet direction are the first heat insulation strip 710 and the second heat insulation strip 720 respectively. The first part of the first plate body 310 and the second plate body 320 being an integral structure can improve the structural strength of the lower air duct plate 300 and the airtightness of the air outlet duct.

[0102] Optionally, the indoor unit of the air conditioner further includes a third heat insulation strip 730, and the third heat insulation strip 730 is arranged on the connecting plate 400. The third heat insulation strip 730 is used to reduce the heat transfer between the second plate body 320 and the bottom plate 500.

[0103] Arranging the third heat insulation strip 730 on the connecting plate 400 can reduce the heat transfer between the second plate body 320 and the connecting plate 400. Since the connecting plate 400 is arranged vertically, it also serves to prevent indoor air from being drawn into the air outlet duct. If the temperature of the connecting plate 400 is relatively low, more condensation will be generated on the connecting plate 400. By arranging the third heat insulation strip 730, the temperature drop of the connecting plate 400 can be reduced, thereby reducing the condensation generated on the connecting plate 400.

[0104] Optionally, the indoor unit of the air conditioner further includes a heating device, and the heating device is used to increase the temperature of the second plate body 320.

[0105] When the temperature of the second plate body 320 is relatively low, the temperature of the second plate body 320 can also be increased by starting the heating device. In this way, the formation of condensation on the second plate body 320 can be reduced or avoided.

[0106] Optionally, the heating device includes a first contact electrode 810 and a second contact electrode 820. The first electrode and the second electrode are connected to start the heating device when the surface of the second plate body 320 is wet.

[0107] After the first contact electrode 810 and the second contact electrode 820 are connected, the heating device starts to heat the second plate body 320. Specifically, the first contact electrode 810 and the second contact electrode 820 are exposed on the side of the second plate body 320 facing the air outlet duct. After condensate is generated on the second plate body 320, the dust impurities dissolved in the condensate are conductive, causing the first contact electrode 810 and the second contact electrode 820 to be connected.

[0108] Adopting such a setting form is beneficial for the heating device to start heating in a timely manner. Since there is no need to set components such as temperature sensors and humidity sensors, and only the presence or absence of water on the surface of the second plate body 320 is used as the trigger condition for the heating device to start, the operation is reliable and the cost is low.

[0109] Optionally, the heating device includes a relay. After the first contact electrode 810 and the second contact electrode 820 are conducted, the connector controls the conduction of the heating circuit of the heating device.

[0110] This can achieve high-voltage and low-voltage isolation between the contact electrode and the heating element of the heating device, improving the safety of use of the indoor unit of the air conditioner.

[0111] Optionally, the heating device further includes a heating wire, and the heating wire is embedded in the second plate body 320.

[0112] Adopting such a setting form can improve the heating effect on the second plate body 320.

[0113] The above description and the accompanying drawings fully illustrate the embodiments of the present disclosure, enabling those skilled in the art to practice them. Other embodiments may include structural and other changes. The embodiments only represent possible variations. Unless explicitly required, individual components and functions are optional, and the order of operations can vary. Some parts and features of some embodiments may be included in or replace parts and features of other embodiments. The embodiments of the present disclosure are not limited to the structures described above and shown in the drawings, and various modifications and changes can be made without departing from its scope. The scope of the present disclosure is only limited by the appended claims.

Claims

1. An air conditioner indoor unit, characterized in that, Comprising: A housing configured with an accommodation space; An air duct assembly disposed in the accommodation space, the air duct assembly defining an air outlet duct, and a first end of the air outlet duct defining an air outlet; Wherein, the air duct assembly includes: A lower air duct plate including a first plate body and a second plate body sequentially arranged along the air flow direction, and the second plate body is located outside the extension line of the first plate body along the air outlet direction.

2. The indoor air conditioner according to claim 1, wherein A ridge line is formed at the connection position between the first plate body and the second plate body, and a first included angle between the first plate body and the second plate body at the ridge line position is less than or equal to 150 degrees.

3. The indoor air conditioner according to claim 2, wherein A step is formed at the connection position between the first plate body and the second plate body, and the first plate body is higher than the second plate body.

4. The indoor air conditioner according to claim 3, wherein The first plate body overlaps on a side of the second plate body facing the air duct to form the step; or, The first plate body is configured with a bending portion to form the step; or, The second plate body is configured with a bending portion to form the step.

5. The indoor air conditioner according to claim 1, wherein The second plate body is configured with a first groove along the width direction, and a bottom of the first groove is away from an air outlet path of the air outlet duct.

6. The indoor air conditioner according to claim 5, wherein A cross-section of the second plate body is arc-shaped to form the first groove.

7. The indoor air conditioner according to claim 1, characterized in that, Further comprising: A connecting plate vertically arranged, and a top end of the connecting plate is connected to an outer end of the second plate body; A bottom plate horizontally arranged, and a front end of the bottom plate is connected to a bottom end of the connecting plate.

8. The indoor air conditioner according to claim 7, wherein The connecting plate is provided with a jet hole, and when the air outlet duct discharges air, indoor air is driven to flow into the air discharged from the air outlet duct through the jet hole.

9. The indoor air conditioner according to claim 8, wherein The bottom plate is provided with an air guiding hole; The indoor air conditioner further includes: A jet pipe having a first end and a second end, the first end of the jet pipe communicating with the jet hole, and the second end of the jet pipe communicating with the air guiding hole.

10. The indoor air conditioner according to any one of claims 1 to 7, wherein The lower air duct plate is provided with a first heat insulation strip to reduce heat transfer between the first plate body and the second plate body.

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