Indoor unit of embedded air conditioner and embedded air conditioner

Abstract

The invention provides an indoor unit of an embedded air conditioner and the embedded air conditioner. The indoor unit comprises an indoor fan, an air inlet is formed in the lower side of the indoor fan, and an air outlet is formed in the periphery of the indoor fan; the indoor heat exchanger extends in the peripheral direction of the indoor fan and is arranged opposite to the air outlet, and the indoor heat exchanger is arranged around the indoor fan; the side wall face, facing the air outlet, of the indoor heat exchanger forms a heat exchange face, and an air guide mounting plate is arranged on the heat exchange face, extends in the width direction of the indoor heat exchanger and is parallel to the central axis of the indoor fan. And at least the part, connected to the heat exchange surface, of the air guide mounting plate is perpendicular to the heat exchange surface. According to the indoor unit and the embedded air conditioner provided by the invention, the aerodynamic performance between the fan blade air outlet and the indoor heat exchanger can be effectively improved, the generation of vortexes is reduced, and the generation of fin noise at the indoor heat exchanger is reduced.

Description

Technical Field

[0001] The present invention relates to the technical field of electrical appliances, and in particular to an indoor unit of an embedded air conditioner and the embedded air conditioner. Background Art

[0002] In the related technology, embedded air conditioners are also called ceiling units, ceiling units or patio units. Embedded air conditioners have long air delivery distances, beautiful appearance, and small footprint, and have been favored by more and more consumers. The working principle of embedded air conditioners is as follows: the indoor air flows through the backward centrifugal fan blades, turns 90°, flows out from the blade outlet and further flows through the indoor heat exchanger. Then, after the outlet air flows through the heat exchanger, it turns 90° under the action of the outlet flow channel and blows out, thereby completing the cooling or heating process of the indoor air flow.

[0003] However, the existing embedded air conditioner is affected by its air outlet mode and internal heat exchanger, electric auxiliary heating and other damping components, and its internal flow is complex and there are many vortices, which can easily affect the aerodynamic performance and noise of the embedded air conditioner itself. In addition, since the evaporator is installed at the outlet end of the centrifugal fan blade, it will form a large air outlet resistance to the air outlet process of the embedded air conditioner, causing the air flow in the space from the centrifugal fan blade outlet to the evaporator inlet to be chaotic, which in turn leads to more serious backflow in the gap between the centrifugal fan blade and the guide ring. In addition, since the airflow direction at the centrifugal fan blade outlet is not completely parallel to the air inlet direction of the evaporator, the flow field in the flow channel from the centrifugal fan blade outlet to the evaporator inlet is relatively turbulent, with more vortices generated, and large flow losses, which will generate large vortex noise and fin sound at the fins. Summary of the invention

[0004] The present invention provides an indoor unit of an embedded air conditioner and an embedded air conditioner, which are used to solve the defects in the prior art and achieve the following technical effects: effectively improve the aerodynamic performance between the air outlet of the fan blade and the indoor heat exchanger, reduce the generation of vortex, and reduce the generation of fin noise at the indoor heat exchanger.

[0005] An indoor unit of an embedded air conditioner according to a first embodiment of the present invention includes:

[0006] An indoor fan, wherein an air inlet is formed at a lower side of the indoor fan and an air outlet is formed at an outer periphery of the indoor fan;

[0007] An indoor heat exchanger, the indoor heat exchanger extending along the outer circumference direction of the indoor fan and arranged opposite to the air outlet, and the indoor heat exchanger is arranged around the indoor fan;

[0008] A side wall of the indoor heat exchanger facing the air outlet forms a heat exchange surface, and an air guide mounting plate is provided on the heat exchange surface. The air guide mounting plate extends along the width direction of the indoor heat exchanger and is parallel to the central axis of the indoor fan, and at least a portion of the air guide mounting plate connected to the heat exchange surface is perpendicular to the heat exchange surface.

[0009] According to an embodiment of the present invention, the air guide mounting plate is perpendicular to the heat exchange surface as a whole.

[0010] According to one embodiment of the present invention, the air guide mounting plate includes a flow guide portion and a drainage portion, one end of the flow guide portion is fixed to the heat exchange surface and the other end is connected to the drainage portion, the flow guide portion is perpendicular to the heat exchange surface, and at least one side wall of the drainage portion is inclined or curved relative to the flow guide portion.

[0011] According to an embodiment of the present invention, one side wall surface of the drainage portion is inclined or curved relative to the flow guiding portion and the other side wall surface thereof is parallel to the flow guiding portion.

[0012] According to an embodiment of the present invention, both side wall surfaces of the drainage portion are inclined or curved relative to the drainage portion.

[0013] According to an embodiment of the present invention, the value range of the inclination angle a of the drainage portion relative to the guide portion is: -60°<a<60°.

[0014] According to an embodiment of the present invention, an electric heating element is provided between the indoor heat exchanger and the air outlet of the indoor fan, and the electric heating element is fixedly connected to the heat exchange surface via the air guide mounting plate.

[0015] According to one embodiment of the present invention, the electric heating element is arranged around the air outlet of the indoor fan, wherein the electric heating element extends along the outer circumference direction of the indoor fan, or the electric heating element extends along the length direction of the heat exchange surface;

[0016] There are multiple air guide mounting plates, and the multiple air guide mounting plates are respectively used to fix different positions of the electric heating element.

[0017] According to an embodiment of the present invention, a wind gathering plate is further installed on the side wall of the wind guide mounting plate. The wind gathering plate is arranged in an arc relative to the wind guide mounting plate and is bent toward a side away from the wind guide mounting plate.

[0018] According to an embodiment of the present invention, the indoor heat exchanger is trapezoidal in a cross section perpendicular to the central axis of the indoor fan, and at least one air guide mounting plate is provided on each inner side wall of the indoor heat exchanger.

[0019] The embedded air conditioner according to the second embodiment of the present invention includes:

[0020] An indoor unit of an embedded air conditioner as described in the first embodiment of the present invention;

[0021] The outdoor unit is connected to the indoor unit.

[0022] The present invention provides an indoor unit of an embedded air conditioner, and its specific working process is as follows: the indoor air flow below the indoor unit rises and enters the air inlet of the indoor fan. Under the rotation work of the blades of the indoor fan, the indoor air flow makes a 90° turn and flows out from the air outlet on the side of the indoor fan to the indoor heat exchanger to realize cooling or heating of the indoor air flow. Among them, in the process of the outlet air flowing to the indoor heat exchanger, the air guide mounting plate can guide and rectify the outlet air flow, so that the outlet air flow can be blown into the indoor heat exchanger in a direction perpendicular to the indoor heat exchanger. At this time, the flow loss of the outlet air flow is the lowest, the flow field is stable, and the probability of vortex generation is small, so the probability of generating vortex is also small, so that the probability of generating vortex noise is also small. In this way, the aerodynamic performance between the fan blade outlet and the indoor heat exchanger can be effectively improved, the generation of vortex is reduced, and the generation of fin noise at the indoor heat exchanger is reduced.

[0023] The indoor unit arranges an air guide mounting plate on the side wall of the indoor heat exchanger facing the air outlet, and further makes at least the portion of the air guide mounting plate connected to the heat exchange surface perpendicular to the heat exchange surface, so that the outgoing air flow can be blown into the indoor heat exchanger in a direction perpendicular to the indoor heat exchanger. At this time, the flow loss of the outgoing air flow is minimal, the flow field is stable, and the probability of vortex generation is small, thereby reducing the probability of vortex noise generation. In this way, the aerodynamic performance between the fan blade outlet and the indoor heat exchanger can be effectively improved, the generation of vortexes can be reduced, and the generation of fin noise at the indoor heat exchanger can be reduced. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] In order to more clearly illustrate the technical solutions in the present invention or the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0025] Figure 1 It is a structural schematic diagram of an indoor unit of an embedded air conditioner provided by an embodiment of the present invention;

[0026] Figure 2 is a structural schematic diagram of an air guide mounting plate provided by an embodiment of the present invention;

[0027] Figure 3 is a structural schematic diagram of an air guide mounting plate provided by another embodiment of the present invention;

[0028] Figure 4 is a structural schematic diagram of an indoor unit of an embedded air conditioner provided by another embodiment of the present invention;

[0029] Figure 5 is a structural schematic diagram of an indoor unit of an embedded air conditioner provided by another embodiment of the present invention;

[0030] Figure 6 is a structural schematic diagram of an indoor unit of an embedded air conditioner provided by another embodiment of the present invention;

[0031] Figure 7 It is a statistical comparison diagram of the relationship between air volume and noise provided by the present invention.

[0032] Reference numerals:

[0033] 1. Indoor fan; 11. Air outlet; 2. Indoor heat exchanger; 21. Heat exchange surface; 3. Air guide mounting plate; 31. Mounting part; 32. Air guide part; 33. Drainage part; 4. Electric heating element. DETAILED DESCRIPTION

[0034] In order to make the purpose, technical solution and advantages of the present invention clearer, the technical solution of the present invention will be clearly and completely described below in conjunction with the drawings of the present invention. Obviously, the described embodiments are part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0035] In the description of the embodiments of the present invention, it should be noted that the terms "center", "longitudinal", "lateral", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside" and the like indicate positions or positional relationships based on the positions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the embodiments of the present invention and simplifying the description, and do not indicate or imply that the devices or elements referred to must have a specific orientation, be constructed and operate in a specific orientation, and therefore cannot be understood as limitations on the embodiments of the present invention. In addition, the terms "first", "second", and "third" are used for descriptive purposes only and cannot be understood as indicating or implying relative importance.

[0036] In the description of the embodiments of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "connected" and "connection" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium. For ordinary technicians in this field, the specific meanings of the above terms in the embodiments of the present invention can be understood according to specific circumstances.

[0037] In the embodiments of the present invention, unless otherwise clearly specified and limited, the first feature being "above" or "below" the second feature may mean that the first and second features are in direct contact, or the first and second features are in indirect contact through an intermediate medium. Moreover, the first feature being "above", "above" and "above" the second feature may mean that the first feature is directly above or obliquely above the second feature, or simply means that the first feature is higher in level than the second feature. The first feature being "below", "below" and "below" the second feature may mean that the first feature is directly below or obliquely below the second feature, or simply means that the first feature is lower in level than the second feature.

[0038] The following describes an indoor unit of an embedded air conditioner and an embedded air conditioner proposed by the present invention with reference to the accompanying drawings, wherein the embedded air conditioner described in the second aspect of the present invention includes the indoor unit with embedded holes described in the first aspect of the present invention.

[0039] like Figures 1 to 5 As shown, the indoor unit of the embedded air conditioner according to the first embodiment of the present invention includes an indoor fan 1 and an indoor heat exchanger 2.

[0040] An air inlet is formed at the lower side of the indoor fan 1 , and an air outlet 11 is formed at the periphery of the indoor fan 1 . The indoor heat exchanger 2 extends along the periphery of the indoor fan 1 and is arranged opposite to the air outlet 11 , and the indoor heat exchanger 2 is arranged around the indoor fan 1 .

[0041] A side wall of the indoor heat exchanger 2 facing the air outlet 11 forms a heat exchange surface 21, and an air guide mounting plate 3 is provided on the heat exchange surface 21. The air guide mounting plate 3 extends along the width direction of the indoor heat exchanger 2 and is parallel to the central axis of the indoor fan 1, and at least the portion of the air guide mounting plate 3 connected to the heat exchange surface 21 is perpendicular to the heat exchange surface 21.

[0042] According to the indoor unit of the embedded air conditioner according to the embodiment of the present invention, its specific working process is as follows: the indoor air flow below the indoor unit rises and enters the air inlet of the indoor fan 1. Under the rotation work of the blades of the indoor fan 1, the indoor air flow makes a 90° turn and flows out from the air outlet 11 on the side of the indoor fan 1 to the indoor heat exchanger 2 to realize cooling or heating of the indoor air flow. Among them, in the process of the outlet air flow flowing to the indoor heat exchanger 2, the air guide mounting plate 3 can guide and rectify the outlet air flow, so that the outlet air flow can be blown into the indoor heat exchanger 2 in a direction perpendicular to the indoor heat exchanger 2. At this time, the flow loss of the outlet air flow is the lowest, the flow field is stable, and the probability of vortex generation is small, so the probability of generating vortex noise is also small. In this way, the aerodynamic performance between the fan blade outlet 11 and the indoor heat exchanger 2 can be effectively improved, the generation of vortex can be reduced, and the generation of fin noise at the indoor heat exchanger 2 can be reduced.

[0043] In the related technology, embedded air conditioners are also called ceiling units, ceiling units or patio units. Embedded air conditioners have long air delivery distances, beautiful appearance, and small footprint, and have been favored by more and more consumers. The working principle of embedded air conditioners is as follows: the indoor air flows through the backward centrifugal fan blades, turns 90°, flows out from the blade outlet and further flows through the indoor heat exchanger. Then, after the outlet air flows through the heat exchanger, it turns 90° under the action of the outlet flow channel and blows out, thereby completing the cooling or heating process of the indoor air flow.

[0044] However, the existing embedded air conditioner is affected by its air outlet mode and internal heat exchanger, electric auxiliary heating and other damping components, and its internal flow is complex and there are many vortices, which can easily affect the aerodynamic performance and noise of the embedded air conditioner itself. In addition, since the evaporator is installed at the outlet end of the centrifugal fan blade, it will form a large air outlet resistance to the air outlet process of the embedded air conditioner, causing the air flow in the space from the centrifugal fan blade outlet to the evaporator inlet to be chaotic, which in turn leads to more serious backflow in the gap between the centrifugal fan blade and the guide ring. In addition, since the airflow direction at the centrifugal fan blade outlet is not completely parallel to the air inlet direction of the evaporator, the flow field in the flow channel from the centrifugal fan blade outlet to the evaporator inlet is relatively turbulent, with more vortices generated, and large flow losses, which will generate large vortex noise and fin sound at the fins.

[0045] In summary, in order to solve the technical defects existing in the above-mentioned related technologies, the present invention provides an indoor unit of an embedded air conditioner, which provides an air guide mounting plate 3 on the side wall of the indoor heat exchanger 2 facing the air outlet 11, and further makes at least the part of the air guide mounting plate 3 connected to the heat exchange surface 21 perpendicular to the heat exchange surface 21, so that the outgoing air flow can be blown into the indoor heat exchanger 2 in a direction perpendicular to the indoor heat exchanger 2. At this time, the flow loss of the outgoing air flow is the lowest, the flow field is stable, and the probability of vortex generation is small, so the probability of generating vortex noise is also small. In this way, the aerodynamic performance between the fan blade outlet 11 and the indoor heat exchanger 2 can be effectively improved, the generation of vortex can be reduced, and the generation of fin noise at the indoor heat exchanger 2 can be reduced.

[0046] It can be understood that the aerodynamic working principle of the air guide mounting plate 3 is as follows:

[0047] like Figure 1 As shown, taking a fluid particle on the blade of the indoor fan 1 as an example, w is the circumferential velocity of the air outlet 11 of the indoor fan 1, the movement of the fluid particle relative to the indoor fan 1 is called relative motion, and its movement speed is called relative velocity u; the movement of the fluid particle relative to the stationary shell of the indoor fan 1 is called absolute motion, wherein the absolute motion is a composite motion of circular motion and relative motion, therefore, the absolute velocity v is equal to the vector sum of the circumferential velocity w and the relative velocity u, that is: v=u+w.

[0048] The angle between the absolute speed v and the circumferential speed w is represented by β, and the angle between the relative speed u and the reverse direction of the circumferential speed w is represented by α. It can be understood that α can also be regarded as the installation position angle of the fan blade. The absolute speed v, the circumferential speed w and the relative speed u together form a speed triangle. Since the present invention mainly studies the change of the angle parameter of the fluid from the air outlet 11 of the indoor fan 1 to the indoor heat exchanger 2, it is sufficient to study the speed triangle of the air outlet 11 of the indoor fan 1. Figure 1 It can be seen that under ideal conditions, β=90°, at this time the absolute velocity v can be perpendicular to the indoor heat exchanger 2, that is, the outlet air flow flows through the indoor heat exchanger 2 in a direction parallel to the fins of the indoor heat exchanger 2. At this time, the flow loss of the outlet air flow is the lowest, the flow field is stable, the probability of vortex generation is small, and the probability of generating vortex noise is also small.

[0049] In this way, by making the angle β between the absolute velocity v and the circumferential velocity w 90°, that is, the direction in which the outlet airflow flows into the indoor heat exchanger 2 is perpendicular to the indoor heat exchanger 2, the flow loss of the airflow can be greatly reduced, and the probability of vortex generation can be reduced, thereby reducing the generation of vortex noise.

[0050] According to some embodiments of the present invention, the structural shape of the air guide mounting plate 3 can be differently set according to different usage scenarios. Specifically, the air guide mounting plate 3 can be completely perpendicular to the heat exchange surface 21 of the indoor heat exchanger 2, or the air guide mounting plate 3 can also be partially perpendicular to the heat exchange surface 21 of the indoor heat exchanger 2. The present invention does not make any special limitations here. Some preferred embodiments will be described in detail below.

[0051] like Figure 2 As shown, in a specific embodiment of the present invention, the air guide mounting plate 3 is perpendicular to the heat exchange surface 21 as a whole.

[0052] At this time, the air guide mounting plate 3 is inserted into and fixed in the indoor heat exchanger 2 through the mounting portion 31, wherein the mounting portion 31 can be chamfered, and the chamfer e of the mounting portion 31 is in the value range of 170° to 180°, and the length of the air guide mounting plate 3 excluding the mounting portion 31 is c, and the value c is related to the distance between the indoor fan 1 and the indoor heat exchanger 2 and the angle of the mounting fins of the indoor heat exchanger 2. Specifically, 0<c<D2-D1, D1 is the radius of the indoor fan 1, and D2 is the vertical distance from the center of the indoor fan 1 to the indoor heat exchanger 2.

[0053] Furthermore, the length d of the mounting portion 31 is related to the overall width L1 of the indoor heat exchanger 2 , specifically, L1 / 3≤d≤L1 / 2. Thus, the mounting portion 31 can be ensured to be firmly installed while preventing the mounting portion 31 from exceeding the overall width of the indoor heat exchanger 2 .

[0054] like Figure 3 As shown, in another specific embodiment of the present invention, the air guide mounting plate 3 includes a guide portion 32 and a drainage portion 33, one end of the guide portion 32 is fixed to the heat exchange surface 21 and the other end thereof is connected to the drainage portion 33, the guide portion 32 is perpendicular to the heat exchange surface 21, and at least one side wall of the drainage portion 33 is inclined or curved relative to the guide portion 32.

[0055] The air guide mounting plate 3 further includes a mounting portion 31 , and the air guide portion 32 is inserted through the mounting portion 31 and fixed on the indoor heat exchanger 2 .

[0056] It can be understood that during the actual use of the indoor unit, the flow direction of the outlet air flow is not always in a directional state, that is, there will always be individual deviations in the direction of the outlet air flow flowing out of the air outlet 11. Therefore, the air guide mounting plate 3 that is completely perpendicular to the indoor heat exchanger 2 is often unable to achieve the best flow guidance effect when facing the above-mentioned outlet air flow with directional deviation, that is, it is impossible to ensure that all the outlet air flows into the indoor heat exchanger 2 in a direction perpendicular to the indoor heat exchanger 2. Therefore, it is necessary to further improve the structure of the air guide mounting plate 3, so as to interfere with the unstable area with a larger deviation angle (that is, the area formed by the unstable outlet air flow) when the outlet air flow flows to the indoor heat exchanger 2.

[0057] In summary, in order to enable the air guide mounting plate 3 to have the same guiding effect on the unstable area with a larger deviation angle, that is, to ensure a better guiding effect of the air guide mounting plate 3, the free end of the air guide mounting plate 3 in this embodiment is designed as a guide portion 33 with at least one side wall inclined or curved, so that the guide portion 33 is used to guide and gather the outlet air flow flowing out of the air outlet 11, that is, through the inclined or curved wall of the guide portion 33, the unstable area with a larger deviation angle (that is, the area formed by the unstable outlet air flow) can be interfered with, and the direction of the outlet air flow with a larger deviation can be fine-tuned, so that the outlet air flow can be gathered to the guide portion 33, and guided along the guide portion 33 to the subsequent guide portion 32, and then the outlet air flow is guided by the guide portion 32 to be an airflow with a direction perpendicular to the heat exchange surface 21 of the indoor heat exchanger 2, so that the air guide mounting plate 3 has the best guiding effect.

[0058] For example, one side wall surface of the drainage portion 33 is inclined or curved relative to the drainage portion 32 and the other side wall surface thereof is parallel to the drainage portion 32 .

[0059] Another example Figure 3 As shown, both side walls of the drainage portion 33 are inclined or curved relative to the drainage portion 32. At this time, the drainage portion 33 is inclined or curved relative to the drainage portion 32 as a whole.

[0060] Further, in this embodiment, when the guide portion 33 is tilted or bent relative to the guide portion 32 as a whole, the length of the guide portion 32 can be zero. At this time, the guide mounting plate only includes the guide portion 33 and the mounting portion 31. However, it should be noted that one end of the guide portion 33 adjacent to the heat exchange surface 21 is also perpendicular to the heat exchange surface 21, thereby ensuring that the airflow flows through the heat exchange surface 21 of the indoor heat exchanger 2 in a vertical direction. At this time, the overall length of the guide portion 33 in the direction perpendicular to the heat exchange surface 21 is c, and the value c is related to the distance between the indoor fan 1 and the indoor heat exchanger 2 and the angle of the mounting fins of the indoor heat exchanger 2. Specifically, 0<c<D2-D1, D1 is the radius of the indoor fan 1, and D2 is the vertical distance from the center of the indoor fan 1 to the indoor heat exchanger 2.

[0061] Of course, the length of the guide portion 32 may also be non-zero. In this case, the overall length of the guide portion 33 and the guide portion 32 in the direction perpendicular to the heat exchange surface 21 is c. The value c is related to the distance between the indoor fan 1 and the indoor heat exchanger 2 and the angle of the mounting fins of the indoor heat exchanger 2. Specifically, 0<c<D2-D1, D1 is the radius of the indoor fan 1, and D2 is the vertical distance from the center of the indoor fan 1 to the indoor heat exchanger 2.

[0062] It should be pointed out that the above embodiments are only some of the many embodiments of the present invention, and do not constitute a specific limitation on the length of the guide portion 32 of the present invention.

[0063] like Figure 3 As shown, further, the value range of the inclination angle a of the drainage portion 33 relative to the guide portion 32 is: -60°<a<60°. Among them, -60° means that the inclination direction is more than one side, that is, the inclination direction of the drainage portion 33 is within the range of 60° on both sides.

[0064] Of course, the above embodiments are only preferred embodiments among many embodiments of the present invention, and do not constitute a specific limitation on the inclination angle a of the present invention.

[0065] like Figure 6 As shown, the air guide mounting plate 3 can also be fixed on the heat exchange surface 21 by a mounting bracket in a threaded connection solution.

[0066] like Figure 4 and Figure 5 As shown, according to some embodiments of the present invention, an electric heater 4 is provided between the indoor heat exchanger 2 and the air outlet 11 of the indoor fan 1, and the electric heater 4 is fixed between the indoor heat exchanger 2 and the air outlet 11 of the indoor fan 1 through an air guide mounting plate 3.

[0067] In this way, the mounting structure between the electric heating element 4 and the indoor heat exchanger 2 is combined with the air guide mounting plate 3, so that the air guide mounting plate 3 has both the air guide function and the installation and fixing function without occupying the existing use space, thereby simplifying the indoor unit structure, saving costs, and improving the functional integration and structural modularity of the air conditioner.

[0068] It can be understood that the cooling and heating of the air conditioner generally depend on the power of the compressor, and the basic principle is the same, but it will be affected by the outdoor temperature. In winter, the efficiency of heating by the compressor alone is low, and it is difficult to achieve the ideal effect. At this time, auxiliary electric heating is required, that is, a bent pipe / semiconductor heating ceramic such as a heating rod added to the indoor unit to assist in heating to achieve the ideal effect. This embodiment improves the electric heating structure on the original basis, and combines the installation structure between the electric heating element 4 and the indoor heat exchanger 2 with the wind guide installation plate 3, thereby increasing the wind guide function without increasing the existing space.

[0069] like Figure 4 and Figure 5 As shown, according to some embodiments of the present invention, the electric heating element 4 is arranged around the air outlet 11 of the indoor fan 1, and there are multiple air guide mounting plates 3, which are respectively used to fix different positions of the electric heating element 4.

[0070] In this way, by setting up multiple air guide mounting plates 3, it can not only ensure that the air flow at various positions around the air outlet 11 can achieve the air guide effect through the air guide mounting plates 3, but also improve the installation stability of the electric heating element 4, ensure that the overall structure is more stable and reliable, and avoid labor failures caused by unstable connections.

[0071] like Figure 4 and Figure 5 As shown, for example, the number of the air guide mounting plates 3 is four, and the four air guide mounting plates 3 are respectively arranged relative to the four symmetrical end points of the indoor fan 1. Of course, the number of the air guide mounting plates 3 can also be other numbers, and the present invention does not make any special restrictions here.

[0072] Furthermore, the electric heating element 4 is an electric heating tube, and a mounting hole is provided on the air guide mounting plate 3. The electric heating tube passes through the mounting hole and is fixed on the air guide mounting plate 3, thereby realizing fixed installation of the electric heating tube.

[0073] Among them, the electric heating tube can be a spiral structure. In this case, the number of mounting holes is two or more, and all the mounting holes on the same air guide mounting plate 3 are evenly arranged along its length direction to correspond to each circle of the electric heating tube.

[0074] In some specific embodiments of the present invention, the electric heating tube extends along the outer circumference of the indoor fan 1. That is, the electric heating tube is in a circular ring structure as a whole.

[0075] In some other specific embodiments of the present invention, the electric heating pipe extends along the length direction of the heat exchange surface 21. That is, in a cross section perpendicular to the central axis of the indoor fan 1, the shape of the electric heating pipe is the same as that of the indoor heat exchanger 2, and the electric heating pipe is surrounded by the interior of the indoor heat exchanger 2.

[0076] Furthermore, the cross-sectional shape of the electric heating tube may be circular, triangular, etc., and the present invention does not impose any special limitation thereto.

[0077] like Figure 4 As shown, in one embodiment, the electric heating element 4 is a circular spiral electric heating tube, and the air guide mounting plate 3 is arranged perpendicular to the heat exchange surface 21 of the indoor heat exchanger 2, and the electric heating element 4 is fixed between the indoor heat exchanger 2 and the indoor fan 1 through the air guide mounting plate 3.

[0078] like Figure 5 As shown, in another embodiment, the electric heating element 4 is a circular spiral electric heating tube, and the air guide mounting plate 3 includes an air guide portion 32 and a flow guide portion 33, the air guide portion 32 is perpendicular to the heat exchange surface 21, and the flow guide portion 33 is bent relative to the air guide portion 32. The electric heating element 4 is fixed between the indoor heat exchanger 2 and the indoor fan 1 through the air guide mounting plate 3.

[0079] like Figure 4 and Figure 5 As shown, according to some embodiments of the present invention, the indoor heat exchanger 2 is trapezoidal in a cross section perpendicular to the central axis of the indoor fan 1 , and at least one air guide mounting plate 3 is provided on each inner side wall of the indoor heat exchanger 2 .

[0080] In this way, the shape adaptability between the indoor heat exchanger 2 and the air outlet 11 of the indoor fan 1 can be made higher, thereby making it easier for the air guide mounting plate 3 to guide the outlet air flow into the indoor heat exchanger 2 .

[0081] Of course, the shape and structure of the indoor heat exchanger 2 is not limited thereto. The present invention can also set the indoor heat exchanger 2 to structures of other different shapes according to actual conditions, and the present invention does not make any special limitations here.

[0082] like Figures 1 to 5 As shown, the embedded air conditioner according to the embodiment of the second aspect of the present invention includes the indoor unit of the embedded air conditioner described in the embodiment of the first aspect of the present invention, and also includes an outdoor unit, which is connected to the indoor unit.

[0083] The specific working process and working principle of the embedded air conditioner according to the embodiment of the present invention have been described in detail above, and the present invention will not be repeated here.

[0084] In summary, according to the embedded air conditioner of the embodiment of the present invention, an air guide mounting plate 3 is arranged on the side wall of the indoor heat exchanger 2 facing the air outlet 11, and further, at least the portion of the air guide mounting plate 3 connected to the heat exchange surface 21 is made perpendicular to the heat exchange surface 21, so that the outgoing air flow can be blown into the indoor heat exchanger 2 in a direction perpendicular to the indoor heat exchanger 2. At this time, the flow loss of the outgoing air flow is minimal, the flow field is stable, and the probability of vortex generation is small, thereby the probability of generating vortex noise is also small. In this way, the aerodynamic performance between the fan blade air outlet 11 and the indoor heat exchanger 2 can be effectively improved, the generation of vortex can be reduced, and the generation of fin noise at the indoor heat exchanger 2 can be reduced.

[0085] Furthermore, the inventors conducted multiple experimental measurements on the relationship between the air volume and noise of the indoor unit in two cases: with a guide structure (i.e., the guide installation plate 3) and without a guide structure (i.e., the guide installation plate 3), and obtained Figure 7 The air volume and noise relationship diagram is shown in FIG. 1 . It can be seen from the figure that the indoor unit with the air guide structure (i.e., the air guide mounting plate 3) of the present invention can reduce the noise by at least 1db-3db under the same air volume compared with the indoor unit without the air guide structure in the related art. Therefore, it can be seen that the air conditioner of the present invention is superior to the air conditioner in the related art.

[0086] In the description of this specification, the description with reference to the terms "one embodiment", "some embodiments", "example", "specific example", or "some examples" etc. means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the embodiments of the present invention. In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described may be combined in any one or more embodiments or examples in a suitable manner. In addition, those skilled in the art may combine and combine the different embodiments or examples described in this specification and the features of the different embodiments or examples, without contradiction.

[0087] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit it. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or make equivalent replacements for some of the technical features therein. However, these modifications or replacements do not deviate the essence of the corresponding technical solutions from the spirit and scope of the technical solutions of the embodiments of the present invention.

Claims

1. An indoor unit of a built-in air conditioner, characterized in that: include: An indoor fan, wherein an air inlet is formed at a lower side of the indoor fan and an air outlet is formed at an outer periphery of the indoor fan; An indoor heat exchanger, the indoor heat exchanger extending along the outer circumference direction of the indoor fan and arranged opposite to the air outlet, and the indoor heat exchanger is arranged around the indoor fan; A side wall of the indoor heat exchanger facing the air outlet forms a heat exchange surface, and an air guide mounting plate is provided on the heat exchange surface. The air guide mounting plate extends along the width direction of the indoor heat exchanger and is parallel to the central axis of the indoor fan, and at least a portion of the air guide mounting plate connected to the heat exchange surface is perpendicular to the heat exchange surface.

2. The indoor unit of the built-in air conditioner according to claim 1, characterized in that: The air guide mounting plate is vertical to the heat exchange surface as a whole.

3. The indoor unit of the built-in air conditioner according to claim 1, characterized in that: The air guide mounting plate includes an air guide portion and a drainage portion, one end of the air guide portion is fixed to the heat exchange surface and the other end is connected to the drainage portion, the air guide portion is perpendicular to the heat exchange surface, and at least one side wall of the drainage portion is inclined or curved relative to the air guide portion.

4. The indoor unit of the built-in air conditioner according to claim 3, characterized in that: One side wall surface of the drainage portion is inclined or curved relative to the flow guiding portion and the other side wall surface is parallel to the flow guiding portion.

5. The indoor unit of the built-in air conditioner according to claim 3, characterized in that: Both side wall surfaces of the drainage portion are inclined or curved relative to the drainage portion.

6. The indoor unit of the built-in air conditioner according to claim 5, characterized in that: The value range of the inclination angle a of the drainage portion relative to the guide portion is: -60°<a<60°.

7. The indoor unit of the built-in air conditioner according to any one of claims 1 to 6, characterized in that: An electric heating element is provided between the indoor heat exchanger and the air outlet of the indoor fan, and the electric heating element is fixedly installed between the indoor heat exchanger and the air outlet of the indoor fan through the air guide mounting plate.

8. The indoor unit of the built-in air conditioner according to claim 7, characterized in that: The electric heating element is arranged around the air outlet of the indoor fan, wherein the electric heating element extends along the outer circumference direction of the indoor fan, or the electric heating element extends along the length direction of the heat exchange surface; There are multiple air guide mounting plates, and the multiple air guide mounting plates are respectively used to fix different positions of the electric heating element.

9. The indoor unit of the built-in air conditioner according to any one of claims 1 to 6, characterized in that: The indoor heat exchanger is trapezoidal in a cross section perpendicular to the central axis of the indoor fan, and at least one air guide mounting plate is provided on each inner side wall of the indoor heat exchanger.

10. An embedded air conditioner, characterized in that: include: An indoor unit of a built-in air conditioner as described in any one of 1 to 9 above; The outdoor unit is connected to the indoor unit.

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