CN212362208U - Indoor unit of air conditioner - Google Patents

Abstract

The application discloses machine in air conditioning includes: the shell comprises a front panel and a back panel which are oppositely arranged along a first direction, and an upper side plate and a lower side plate which are oppositely arranged along a second direction, wherein the first direction is vertical to the second direction; the shell forms an accommodating cavity, the front panel is provided with a first air inlet area, and the lower side plate is provided with a first air outlet area; the first heat exchanger is arranged in the accommodating cavity, and at least part of the projection of the first air inlet area along the first direction falls on the first heat exchanger; the first heat exchanger is arranged at intervals with the back plate along the first direction, and the interval area forms a settlement enhancement area; the ratio of the thickness of the first heat exchanger along the first direction to the distance between the front panel and the back plate along the first direction is 0.06-0.5, and the ratio of the thickness of the first heat exchanger along the first direction to the distance between the first heat exchanger and the back plate along the first direction is 0.068-1. This application air conditioning indoor set can realize comparatively efficient refrigeration air supply.

Description

Indoor unit of air conditioner

Technical Field

The application relates to the technical field of air conditioners, in particular to an air conditioner indoor unit.

Background

At present, indoor air conditioning units mostly suck indoor return air into an indoor unit through a fan, and then blow cold air obtained after heat exchange of an evaporator into the indoor unit, so that the air quantity is large, the noise generated by operation of the fan is large, and poor experience is caused for users.

SUMMERY OF THE UTILITY MODEL

The application provides an air conditioner indoor unit to solve the problem that the air conditioner indoor unit in the prior art is large in noise and air volume.

In order to solve the above technical problem, the present application provides an air conditioning indoor unit, including: the shell comprises a front panel and a back panel which are oppositely arranged along a first direction, and an upper side plate and a lower side plate which are oppositely arranged along a second direction, wherein the first direction is vertical to the second direction; the shell forms an accommodating cavity, the front panel is provided with a first air inlet area, and the lower side plate is provided with a first air outlet area; the first heat exchanger is arranged in the accommodating cavity, and at least part of the projection of the first air inlet area along the first direction falls on the first heat exchanger; the first heat exchanger is arranged at intervals with the back plate along the first direction, and the interval area forms a settlement enhancement area; the ratio of the thickness of the first heat exchanger along the first direction to the distance between the front panel and the back plate along the first direction is 0.06-0.5, and the ratio of the thickness of the first heat exchanger along the first direction to the distance between the first heat exchanger and the back plate along the first direction is 0.068-1.

The application provides an indoor unit of an air conditioner, wherein, the air of holding intracavity is cooled down to first heat exchanger and second heat exchanger to form cooling air flow, among the cooling air flow at least part subsides along subsiding the enhancement district, and export through first play wind zone, make the holding chamber be in the negative pressure state, the outside air of casing is under the negative pressure effect of holding intracavity, separately from first income wind zone and second income wind zone input to the holding chamber, and cool off by first heat exchanger and second heat exchanger, in order to continuously produce cooling air flow. The ratio of the thickness of the first heat exchanger in the first direction to the distance between the front panel and the back plate in the first direction is 0.06-0.5, and the ratio of the thickness of the first heat exchanger in the first direction to the distance between the first heat exchanger and the back plate in the first direction is 0.068-1. The proportion design realizes the settlement enhancement area in a certain space and increases the refrigeration efficiency.

Drawings

In order to more clearly illustrate the technical solutions in the embodiments of the present application, the drawings needed to be used in the description of the embodiments are briefly introduced below, it is obvious that the drawings in the following description are only some embodiments of the present application, and other drawings can be obtained by those skilled in the art without inventive efforts, wherein:

fig. 1 is a schematic structural view of an air conditioning indoor unit according to an embodiment of the present application;

fig. 2 is a side schematic view of the air conditioning indoor unit of the embodiment of fig. 1;

fig. 3 is a schematic structural diagram of a first heat exchanger in the embodiment of the indoor unit of the air conditioner shown in fig. 1;

FIG. 4 is a schematic front view of the first heat exchanger shown in FIG. 3

Fig. 5 is another schematic structural diagram of the first heat exchanger in the indoor unit of the air conditioner of the present application;

fig. 6 is a schematic structural view of the first heat exchanger shown in fig. 5 applied to an indoor unit of an air conditioner;

fig. 7 is a schematic side view of a water collection tank in the embodiment of the indoor unit of the air conditioner shown in fig. 1;

fig. 8 is a front view schematically illustrating a water collecting groove in the embodiment of the indoor unit of the air conditioner shown in fig. 1;

fig. 9 is a schematic view showing a structure of a blower used in the embodiment of the indoor unit of the air conditioner shown in fig. 1;

fig. 10 is a schematic top view showing a first heat exchanger in the indoor unit of the air conditioner using a blower fan shown in fig. 9;

fig. 11 is a schematic front view of another fan used in the embodiment of the indoor unit of the air conditioner shown in fig. 1;

fig. 12 is a schematic side view of another embodiment of the indoor unit of the air conditioner shown in fig. 1;

FIG. 13 is a schematic diagram of the embodiment of the indoor unit of the air conditioner shown in FIG. 1 in combination with a fresh air system;

FIG. 14 is a schematic side view of the air conditioning indoor unit of FIG. 1 with a fresh air injection device;

fig. 15 is a schematic structural view of a radiation heating panel provided in the embodiment of the air conditioning indoor unit shown in fig. 1.

Detailed Description

The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application, and it is obvious that the described embodiments are only a part of the embodiments of the present application, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present application.

It should be noted that if directional indications (such as up, down, left, right, front, and back … …) are referred to in the embodiments of the present application, the directional indications are only used to explain the relative positional relationship between the components, the movement situation, and the like in a specific posture (as shown in the drawings), and if the specific posture is changed, the directional indications are changed accordingly.

In addition, if there is a description of "first", "second", etc. in the embodiments of the present application, the description of "first", "second", etc. is for descriptive purposes only and is not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one such feature. In addition, technical solutions between various embodiments may be combined with each other, but must be realized by a person skilled in the art, and when the technical solutions are contradictory or cannot be realized, such a combination should not be considered to exist, and is not within the protection scope of the present application.

Referring to fig. 1-2, fig. 1 is a schematic structural view of an embodiment of an air conditioning indoor unit of the present application, and fig. 2 is a schematic side view of the embodiment of the air conditioning indoor unit shown in fig. 1. The air conditioning indoor unit 100 of the present embodiment includes a first heat exchanger 11 and a casing 13.

Wherein the housing 13 includes a front panel 131 and a back panel 132 oppositely disposed along a first direction X, an upper panel 133 and a lower panel 134 oppositely disposed along a second direction Y, and a left panel 135 and a right panel 136 oppositely disposed along a third direction Z, the first direction X, the second direction Y9 and the third direction Z being perpendicular to each other. In other embodiments, the left side plate 135 and the right side plate 136 may not be provided in the housing 13.

In this embodiment, the front panel is provided with a first air inlet area 1311, the lower side panel 134 is provided with a first air outlet area 1341, and outside air enters from the first air inlet area 1311 and is discharged from the first air outlet area 1341.

The plate forming the housing 13 is enclosed to form an accommodating chamber, i.e. the housing 13 forms an accommodating chamber. The first heat exchanger 11 is disposed in the accommodating cavity, and a projection of the first air intake area 1311 along the first direction X at least partially falls on the first heat exchanger 11, that is, external air entering from the first air intake area 1311 is cooled by the first heat exchanger 11. The first heat exchanger 11 is arranged spaced apart from the backplate 132 in the first direction X, the spacing between them constituting a sedimentation enhancement zone 137.

The specific principle is that the first heat exchanger 11 cools the air in the accommodating cavity, because the air density is different at different temperatures, the cold air will sink and the hot air will rise, so that cooling air flow can be formed in the accommodating cavity, at least part of the cooling air flow will sink in the settling enhancement area 137 and be discharged through the first air outlet area 1341, so that the accommodating cavity is in a negative pressure state, and the air outside the housing 13 enters the accommodating cavity from the first air inlet area 1311 under the action of the negative pressure in the accommodating cavity and continues to be cooled by the first heat exchanger 11, thereby continuously generating the cooling air flow. Therefore, the embodiment can meet the refrigeration requirement under the condition that the fan is not needed.

Further, in order to achieve an efficient cooling effect, in the present embodiment, the thickness of the first heat exchanger 11 in the first direction X is T1, the distance between the inner wall surface of the front panel 131 and the inner wall surface of the rear panel 132 in the first direction is G1, the distance between the surface of the first heat exchanger 11 facing the rear panel 132 and the inner wall surface of the rear panel 132 in the first direction is G2, the ratio between T1 and G1 is 0.06-0.5, and the ratio between T1 and G2 is 0.068-1. The sedimentation enhancement zone has a certain width in the first direction to form a chimney effect, so that the overall refrigeration efficiency is higher. Therefore, in this embodiment, the entire air conditioning indoor unit can be designed to be light and thin, and the thickness T2 of the entire air conditioning indoor unit 100 along the first direction X can be designed to be less than 90mm, so that the air conditioning indoor unit can be designed to be light and thin and have a high-efficiency cooling effect.

In order to enhance the sedimentation effect of the sedimentation enhancement zone and increase the air convection, in this embodiment, a second heat exchanger 12 is further provided, the upper side plate 133 is provided with a second air inlet zone 1331, and the outside air enters from the first air inlet zone 1311 and the second air inlet zone 1331 and is discharged from the first air outlet zone 1341.

The second heat exchanger 12 is arranged in the accommodating cavity, and the projection of the second air inlet region 1331 along the second direction Y at least partially falls on the second heat exchanger 12; that is, the outside air introduced from the second air intake region 1331 is cooled by the second heat exchanger 12.

The external air enters the accommodating cavity from the second air inlet region 1331 of the upper side plate 133, passes through the second heat exchanger 12 and then becomes cooling gas, and is discharged from the first air outlet region 1341 of the lower side plate 134; and the external air enters the accommodating cavity from the first air inlet region 1311 of the front panel 131, passes through the first heat exchanger 11, is changed into cooling air, and is discharged from the first air outlet region 1341 of the lower side plate 134.

The projection of the second heat exchanger 12 in the second direction falls at least partly into the sedimentation enhancement zone 137. The specific principle is that the first heat exchanger 11 and the second heat exchanger 12 cool air in the accommodating cavity, because the air density is different at different temperatures, the cold air will sink, and the hot air will rise, so that a cooling airflow will be formed in the accommodating cavity, at least part of the cooling airflow, for example, the cooled part of the second heat exchanger 12 will sink in the settling enhancement region 137 and be discharged through the first air outlet region 1341, so that the accommodating cavity is in a negative pressure state, and the air outside the housing 13 enters the accommodating cavity from the first air inlet region 1311 and the second air inlet region 1331 respectively under the action of the negative pressure in the accommodating cavity, and is continuously cooled through the first heat exchanger 11 and the second heat exchanger 12, so as to continuously generate the cooling airflow. Therefore, the embodiment can meet the refrigeration requirement under the condition that the fan is not needed.

The whole process forms chimney effect in the settlement enhancing area 137, a large amount of cold air is formed through chimney effect enhancement and is gathered and settled, then cold air is gushed out from the first air outlet area 1341, the enhanced air settlement effect further causes indoor return air to continuously enter from the first air inlet area 1311 and the second air inlet area 1331, and the circulation of the indoor supply air and the return air is completed.

In both cases, natural air supply can be achieved by only providing the first heat exchanger 11, or by providing both the first radiator 11 and the second radiator 12.

Further, to enhance the effect of the chimney effect, the lower edge of the projection area of the first heat exchanger 11 on the front panel 131 is located between the lower edge of the first air intake zone 1311 and the lower side plate 134. If there is the second heat exchanger 12, the second heat exchanger 12 covers the second air intake area 1331 in the projection area of the upper side plate 133 to improve the cooling effect.

As for the first air intake area 1311, the area on the front panel 131 for entering the external air may be an overall opening, and the entire opening is the first air intake area 1311; in order to improve the air intake efficiency, the first air intake area 1311 may be an area having an aperture ratio of not less than 0.15 per square decimeter in this embodiment. For aesthetic or other considerations, a single or double aperture is not considered to belong to the first intake zone 1311. The second intake area 1331 is defined similarly.

For the whole air conditioner indoor unit, in order to obtain an efficient chimney effect, in the region between the first heat exchanger 11 and the lower side plate 134, the shell part can be considered to adopt a hollow plate for heat insulation, or the design of pasting a heat insulation material inside to insulate the cooling air flow, so that the sedimentation efficiency is improved.

For the different temperature sensing positions of users, the lower side plate 134 of the indoor unit 100 of the air conditioner can be designed to rotate, for example, to be rotatably connected to the rear back plate 132, or to be rotatably connected to the left side plate 135 and the right side plate 136; thereby realizing the adjustability of the air supply direction of the first air outlet region 1341. Or the part of the housing 13 near the lower side plate 134 is movable up and down or rotatable, so as to adjust the position or the air blowing direction of the first air outlet region 1341.

The design of no fan in this embodiment can correspond and use simple structure's heat exchanger. For example, as shown in fig. 2 to 4, fig. 3 is a schematic structural view of a first heat exchanger in an embodiment of an indoor unit of an air conditioner shown in fig. 1, and fig. 4 is a schematic structural view of a front side of the first heat exchanger shown in fig. 3; in the present embodiment, the first heat exchanger 11 includes a plurality of first heat exchange tubes 111 arranged at intervals along the first reference plane a. In fig. 3, the first heat exchanger tubes 111 are in a single row configuration, i.e., the first heat exchanger tubes 111 are arranged along a single reference plane, and in other embodiments, the first heat exchanger tubes 111 may be in a double-row or multi-row configuration, i.e., there are multiple sets of first heat exchanger tubes, each set of first heat exchanger tubes is arranged along a reference plane, and the multiple sets of first heat exchanger tubes are arranged along multiple parallel reference planes.

An included angle between the first reference plane a, i.e., the plane where the first heat exchange pipeline 111 is located, and the second direction Y is greater than or equal to 0 degree and less than or equal to 5 degrees. The space V1 formed by the orthographic projection of the first reference plane a onto the front panel 131 in the first direction X is smaller than the space V2 formed by the orthographic projection of the first reference plane a onto the back panel 132 in the first direction X, i.e. the volume of the space V1 is larger than the volume of the space V2, and the area of the first reference plane a and the distance from the first reference plane a to the front panel 131 or the back panel 132 are required for calculating the volume of the space, wherein the first reference plane a is the area enclosed by the first heat exchange tubes 111, as shown by the dashed line a in fig. 4, and thus the area thereof, i.e. the area enclosed by the edges of the heat exchange tubes, so that a subsidence enhancing area can be formed between the first heat exchanger 11 and the back panel 132.

The first heat exchanger 11 further includes a plurality of first heat exchanging fins 112, and the plurality of first heat exchanging fins 12 are arranged at intervals along the third direction Z. The first heat exchange fin 112 and the first heat exchange pipeline 111 form a heat conduction connection therebetween.

In order to reduce the wind resistance of natural air supply and improve the cooling effect, the ratio of the fin width W1 of the first heat exchange fin 112 to the distance G3 between two adjacent first heat exchange fins 112 in this embodiment is greater than or equal to 2.5 and less than or equal to 7.

The heat exchanger can also adopt another arrangement mode, as shown in fig. 5 and fig. 6, fig. 5 is another structural schematic diagram of the first heat exchanger in the indoor unit of the air conditioner, and fig. 6 is a structural schematic diagram of the first heat exchanger shown in fig. 5 applied to the indoor unit of the air conditioner.

Taking the first heat exchanger 11 as an example, the first heat exchanger includes a plurality of first heat exchange fins 112, the first heat exchange tube 111 is integrated inside the first heat exchange fins 112, wherein the first heat exchange fins 112 have a first thickness T3 in a region where the first heat exchange tube 111 is located, the first heat exchange fins 112 have a second thickness T4 in other regions outside the first heat exchange tube 111, a ratio T3/T4 between the first thickness T3 and the second thickness T4 is greater than or equal to 1.1 and less than or equal to 2.5, and a ratio G3/T3 between a distance G3 between two adjacent first heat exchange fins and the second thickness T3 is greater than or equal to 2 and less than or equal to 20.

The plurality of first heat exchange fins 112 are placed in the housing in a serial or parallel manner, the first heat exchange pipeline 111 is a refrigerant flow path, and can be formed by blowing on the first heat exchange fins 112, and can be generally set to be U-shaped, and the arrangement manner of the first heat exchange pipeline 111 on the first heat exchange fins 112 makes the temperature on the first heat exchange fins 112 as uniform as possible. Such a heat exchanger can reduce the obstruction to the air.

With respect to the second heat exchanger 12, referring to fig. 2, in order to avoid the condensed water generated on the second heat exchanger 12 from directly dropping from the first air outlet region 1341 in the lower side plate 134, in the present embodiment, the second heat exchanger 12 is disposed obliquely from the back plate 132 to the front plate 131 toward the lower side plate 134, and the projection of the second heat exchanger 12 along the second direction Y at least partially drops onto the first heat exchanger 11. So that the condensate water on the second heat exchanger 12 can flow down along or through the area of the first heat exchanger 11. Further, in order to control the condensed water to stably flow down along the first heat exchanger 11, the second heat exchanger 12 may be attached to the first heat exchanger 11.

For the second heat exchanger 12 itself, the second heat exchanger 12 may adopt two design manners of the first heat exchanger 11, in this embodiment, the second heat exchanger includes a plurality of second heat exchange pipelines 121 arranged at intervals along the second reference plane B, and an included angle α between the first reference plane a and the second reference plane B is greater than 0 degree and less than or equal to 30 degrees, so that the second heat exchanger 12 is arranged obliquely, and too over-inclination is avoided, and the refrigeration effect on the air entering the second air intake area 1331 is not good.

The second heat exchanger 12 further includes a plurality of second heat exchanging fins 121 spaced apart from each other along a third direction, and each second heat exchanging fin 121 and a corresponding first heat exchanging fin 112 are located on the same plane. The first heat exchange plate 112 and the second heat exchange plate 121 are prevented from being staggered to cause obstruction to the air flow.

Since the heat exchanger will generate condensed water when cooling air, the indoor unit 100 of the air conditioner of the present embodiment further includes a water collection tank 14, please refer to fig. 7 and 8, fig. 7 is a schematic side structure diagram of the water collection tank in the embodiment of the indoor unit of the air conditioner shown in fig. 1, and fig. 8 is a schematic front structure diagram of the water collection tank in the embodiment of the indoor unit of the air conditioner shown in fig. 1.

The water collection tank 14 is disposed on one side of the first heat exchange fin 12 facing the lower side plate 134, condensed water on the first heat exchanger 11 and the second heat exchanger 12 can be guided into the water collection tank 14, and the width W3 of the bottom edge of the first heat exchange fin 12 along the first direction is smaller than or equal to the width W4 of the opening of the water collection tank 14 along the first direction.

Whereas the water collection sump 14, which has a width in the first direction larger than the width of the first plate 12, affects the sinking of the cooling air flow, a chamfered edge is provided between the side edge of the first plate 12 facing the backing plate 132 and the bottom edge facing the lower side plate 134, the chamfered edge being inclined towards the front plate 131 in the direction from the upper side plate 133 to the lower side plate 134. Which in turn reduces the effect of the sump 14 on the cooling air flow settling. Specifically, the ratio between the maximum width (W4 in the present embodiment) of the water collection tub 14 in the first direction X and the distance G1 between the front and back panels 131 and 132 in the first direction X is not more than 0.5.

Since the water collection tank 14 has an obstruction effect on the natural flow of the air flow in the plane formed by the first direction and the third direction, the side surface of the water collection tank 14 facing the back plate 132 is a slope that is inclined toward the front plate 131 in the direction from the upper side plate 133 to the lower side plate 134, and the angle β between the front plate 131 and the slope is greater than 0 degrees and less than 60 degrees.

The water collection sump 14 may be designed in a V-shaped configuration as shown in fig. 8 as viewed in the first direction so that the collected condensed water can smoothly flow out. Besides, the inclination along the third direction can be designed to be unilateral.

The continuous natural cooling convection is realized for the embodiment, and the mode is a natural air supply mode. In this embodiment, a fan may be further provided to realize active cooling, i.e., a forced air supply mode. In practical application, when the indoor temperature needs to be rapidly reduced, a forced air supply mode can be adopted, and when the indoor temperature is reduced to an acceptable range, the mode is switched to a natural air supply mode.

Referring to fig. 1 and 9, fig. 9 is a schematic structural view of a blower used in the embodiment of the indoor unit of the air conditioner shown in fig. 1.

In the indoor unit 100 of the present embodiment, the left side plate 135 and the right side plate 136 are provided with second air outlet areas 1351/1361, and the first fan 15 and the second fan 16 are respectively disposed near the left side plate 135 and the right side plate 136 for blowing the cooling air flow in the accommodating chamber to the second air outlet areas 1351/1361 of the left side plate 135 and the right side plate 136, respectively.

Namely, fans are respectively arranged on the left side plate and the right side plate to form surrounding forced air supply, indoor return air is mainly sucked from the first air inlet area 131, cooled by the first heat exchanger 11 and then blown out from the second air outlet areas 1351/1361 on two sides, and a surrounding type air supply mode of air suction in the middle and air outlet on two sides is formed.

In this way, furthermore, the heat exchanger near the fan area has a larger heat exchange area for forced convection than other areas. Referring to fig. 10, fig. 10 is a schematic structural view of a first heat exchanger in the indoor unit of the air conditioner using the fan shown in fig. 9.

A first spacing G5 exists between adjacent first fins 112 in a middle region of the first heat exchanger 11 centered along the third direction Z, and a second spacing G6 exists between adjacent first fins 112 in both side regions of the first heat exchanger 11 adjacent to the left and right side plates 135, 136 along the third direction Z, wherein the first spacing G5 is greater than the second spacing G6.

The heat exchange plates with the first spacing G5 are far away from the fan and are mainly used for exchanging heat for natural convection air, and the first spacing G5 is set to be 2-8 mm; and the heat exchange plates with the second spacing G6 are close to the fan, the heat exchange plates are dense to increase the heat exchange area of forced convection, and therefore the ratio between the first spacing G5 and the second spacing G6 is more than 1 and less than or equal to 2.5.

The dense and sparse areas of the heat exchanger are not required to be in one heat exchanger, but only the density degree of fins in the heat exchanger areas at different positions relative to the fan is described, so that the dense and dense areas can be concentrated on the same heat exchanger, and the heat exchangers with different fin pitches can be used in combination.

Referring to fig. 11 and 12, as for another arrangement of the fan, fig. 11 is a schematic front structure diagram of the fan used in the embodiment of the indoor unit of the air conditioner shown in fig. 1, and fig. 12 is a schematic side structure diagram of the fan used in the embodiment of the indoor unit of the air conditioner shown in fig. 1.

The air-conditioning indoor unit 100 may further include a fan 17, and the fan 17 may be disposed below the water collection tank 14. In order to achieve the optimal active air inducing effect, the fan 17 is as close to the first heat exchanger 11 as possible, and meanwhile, in order to make the rear natural convection smooth, the fan 17 is placed as close to the front panel 131 as possible and is inclined at a certain angle compared with the front panel 131, so that the fan 17 has an air inlet direction and an air outlet direction as shown in fig. 12. In the natural blowing mode, cooling air flows from an area between the fan 17 and the back plate 132, and in the forced blowing mode, cooling air is discharged from the first blowing zone 1341 via the fan 17.

In addition, the indoor unit of the air conditioner can be combined with a fresh air system, so that the problem of poor indoor air quality is solved while the refrigerating speed is increased.

As shown in fig. 13, fig. 13 is a schematic view of the air conditioning indoor unit of fig. 1 according to the embodiment of the present invention combined with a fresh air system. The fresh air is combined with a fresh air system, and the fresh air is led into the indoor unit through the fresh air fan or by utilizing the outdoor unit fan to isolate a part of air which does not pass through the outdoor heat exchanger. A heat exchanger can be arranged between the fresh air and the indoor exhaust air to exchange heat and even humidity, and the refrigeration utilization rate is improved.

The indoor unit 100 of the air conditioner may include a fresh air injection device 18, the fresh air injection device 18 is disposed in the accommodating cavity and is configured to inject fresh air from the outside into the accommodating cavity, and the fresh air injection device 18 may be in the form of a nozzle or a slit. As shown in fig. 14, fig. 14 is a schematic side view of the air conditioning indoor unit of fig. 1 in an embodiment in which a fresh air injection device is installed.

To reduce the effect of the fresh air injection device 18 on the natural intake air, it may be located close to the second heat exchanger 12. The fresh air injection device 18 may be disposed on a side of the second heat exchanger 12 facing the lower side plate 134, and a jet direction of the fresh air injection device 18 is directed to the lower side plate 134 along the second direction.

The fresh air injection device 18 may also be disposed on a side of the second heat exchanger 12 away from the lower side plate 134, and a jet direction of the fresh air injection device 18 is directed to the back plate 132, and an included angle γ between the fresh air injection device 18 and the back plate 132 is greater than or equal to 2 degrees and less than or equal to 20 degrees. So as to avoid the adverse effect of the large amount of jet flow directly hitting the rear back plate 132 and reflecting on the inlet air of the first air inlet region 1311.

The indoor unit 100 of the air conditioner in this embodiment can also achieve a heating function in addition to a cooling function, for example, fig. 15 is a schematic structural diagram of a radiation heating panel provided in the embodiment of the indoor unit of the air conditioner shown in fig. 1.

The front panel 131 is provided with the radiant heating plate 1312, and the indoor unit 100 can realize a radiant heating effect by combining the radiant heating plate 1312 when heating is needed, and further realize a forced convection heating effect by combining a fan arranged in the indoor unit 100.

Heating wires or other heating elements can be arranged in the radiation heating plate 1312 for heating, radiation heat dissipation is carried out through the outer surface, and meanwhile, the fan is started to forcibly blow hot air, so that two heating modes of radiation and convection can be carried out simultaneously. Considering that the temperature of the radiation surface may be high, a protective screen 1313 may be disposed on the outer surface of the radiation heating plate 1312 to prevent the user from directly touching the high temperature surface.

The above description is only an example of the present application and is not intended to limit the scope of the present application, and all modifications of equivalent structures and equivalent processes, which are made by the contents of the specification and the drawings, or which are directly or indirectly applied to other related technical fields, are intended to be included within the scope of the present application.

Claims (10)

1. An air conditioning indoor unit, characterized in that, the air conditioning indoor unit includes:

the shell comprises a front panel and a back panel which are oppositely arranged along a first direction, and an upper side plate and a lower side plate which are oppositely arranged along a second direction, wherein the first direction is perpendicular to the second direction; the shell forms an accommodating cavity, the front panel is provided with a first air inlet area, and the lower side plate is provided with a first air outlet area;

the first heat exchanger is arranged in the accommodating cavity, and at least part of the projection of the first air inlet area along the first direction falls on the first heat exchanger; the first heat exchanger and the rear back plate are arranged at intervals along the first direction, and the interval area forms a settlement enhancement area;

the ratio of the thickness of the first heat exchanger in the first direction to the distance between the front panel and the back plate in the first direction is 0.06-0.5, and the ratio of the thickness of the first heat exchanger in the first direction to the distance between the first heat exchanger and the back plate in the first direction is 0.068-1.

2. An indoor unit of an air conditioner according to claim 1, wherein a lower edge of a projected area of the first heat exchanger on the front panel is located between a lower edge of the first air intake area and the lower side plate.

3. An indoor unit of an air conditioner according to claim 2, wherein the first air intake area is an area having an opening ratio of not less than 0.15 per square decimeter.

4. An indoor unit of an air conditioner according to claim 1, wherein the casing further includes a left side plate and a right side plate disposed opposite to each other in a third direction, and the first direction, the second direction, and the third direction are perpendicular to each other; the first heat exchanger comprises a plurality of first heat exchange fins, and the plurality of first heat exchange fins are arranged at intervals along the third direction.

5. An indoor unit of an air conditioner according to claim 4, comprising a water collection groove provided on a side of the first heat exchanger plate facing the lower side plate, wherein a chamfered edge is provided between a side edge of the first heat exchanger plate facing the rear back plate and a bottom edge of the first heat exchanger plate facing the lower side plate, the chamfered edge is inclined toward the front panel in a direction from the upper side plate to the lower side plate, and a width of the bottom edge of the first heat exchanger plate in the first direction is smaller than or equal to a width of an opening of the water collection groove in the first direction.

6. An indoor unit of an air conditioner according to claim 5, wherein a ratio between a maximum width of the water collecting groove in the first direction and a distance between the front panel and the back panel in the first direction is not more than 0.5.

7. An indoor unit of an air conditioner according to claim 5, wherein a side surface of the water collecting groove facing the rear back plate is an inclined surface, the inclined surface is inclined toward the front panel in a direction from the upper side plate to the lower side plate, and an included angle between the inclined surface and the front panel is greater than 0 degree and smaller than 60 degrees.

8. An indoor unit of an air conditioner as claimed in claim 4, wherein a first interval is formed between two adjacent first heat exchange fins, and the first interval is 1mm-10 mm.

9. An indoor unit of an air conditioner according to claim 4, wherein a ratio of a fin width of the first heat exchange fin to a distance between two adjacent first heat exchange fins is greater than or equal to 2.5 and less than or equal to 7.

10. An indoor unit of an air conditioner according to claim 4, wherein the upper side plate is provided with a second air intake area; the air-conditioning indoor unit further comprises: the second heat exchanger is arranged in the accommodating cavity, and at least part of the projection of the second air inlet area along the second direction falls on the second heat exchanger; the projection of the second heat exchanger along the second direction at least partially falls into the sedimentation enhancement zone;

the second heat exchanger comprises a plurality of second heat exchange sheets arranged at intervals along a third direction, and each second heat exchange sheet and the corresponding first heat exchange sheet are located on the same plane.

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