Indoor unit and heating and ventilation equipment

Abstract

The indoor unit comprises a shell, an indoor heat exchanger and a grating assembly, an air inlet and an air outlet are formed in the bottom face of the shell in a spaced mode, an air flue communicating with the air inlet and the air outlet is formed in the shell, and the indoor heat exchanger is obliquely arranged in the air flue; at least part of the indoor heat exchanger is arranged opposite to the air inlet, and the grid assembly is arranged at the air inlet and comprises a plurality of grid strips which are arranged at intervals in an arc shape. According to the embodiment of the invention, the multiple grid strips are arranged in the arc shape at intervals, and the whole formed by the multiple grid strips protrudes outwards in the direction away from the indoor heat exchanger, so that the heat exchange efficiency of the indoor unit is improved, and the aerodynamic efficiency of the air duct is improved.

Description

Technical Field

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

[0002] HVAC equipment may include air conditioners, which are indispensable electrical equipment in daily life. In related technologies, an air inlet grille is provided at the air inlet of the air conditioner. Due to the existence of the air inlet grille, and the fact that the air inlet grille is often in a flat plate shape, the airflow from the air inlet of the air conditioner into the air conditioner is easily obstructed, thereby reducing the air intake of the air conditioner, thereby resulting in lower aerodynamic efficiency of the air duct in the air conditioner connected to the air inlet. Utility Model Content

[0003] The embodiments of the present application provide an indoor unit and HVAC equipment, aiming to improve the heat exchange efficiency of the indoor unit and improve the aerodynamic efficiency of the air duct.

[0004] A first aspect of an embodiment of the present application provides an indoor unit, which includes a shell, an indoor heat exchanger and a grille assembly, wherein the shell is provided with an air inlet and an air outlet at intervals on the bottom surface, and an air duct connecting the air inlet and the air outlet is formed inside the shell, the indoor heat exchanger is tilted in the air duct, and at least a portion of the indoor heat exchanger is arranged opposite to the air inlet, the grille assembly is arranged at the air inlet, and the grille assembly includes a plurality of grille bars arranged in an arc shape at intervals, and the plurality of grille bars form a whole that bulges outward in a direction away from the indoor heat exchanger.

[0005] Furthermore, the plurality of grille bars are arranged along the front-to-rear direction of the indoor unit, and from the front to the rear, the whole formed by the plurality of grille bars gradually tilts toward the indoor unit.

[0006] Furthermore, the grille assembly includes a first grille bar group and a second grille bar group divided into equal lengths along the front-to-back direction of the indoor unit, the first grille bar group is closer to the air outlet than the second grille bar group, and the curvature of the first grille bar group is smaller than that of the second grille bar group.

[0007] Furthermore, a plurality of the grille bars are arranged along the front-to-back direction of the indoor unit, and the grille bars include rear grille bars closest to the rear side of the indoor unit, and front grille bars closest to the front side of the indoor unit, the front grille bars are lower than the rear grille bars, and the height difference between the front grille bars and the rear grille bars is not less than 10 mm and not more than 20 mm.

[0008] Furthermore, a first angle between a straight line connecting the vertices of the front grille bars and the vertices of the rear grille bars and the horizontal plane is not less than 5 degrees and not more than 15 degrees, and / or a second angle between a straight line connecting the vertices of the front grille bars and the vertices of the rear grille bars and the windward surface of the indoor heat exchanger is not less than 20 degrees and not more than 40 degrees, and / or a third angle between the windward surface of the indoor heat exchanger and the horizontal plane is not less than 25 degrees and not more than 45 degrees.

[0009] Furthermore, the connection line of the bottom ends of all the grille bars is an arc line, and the rear end and the front end of the arc line in the front-to-rear direction of the indoor unit smoothly transition to the bottom surface of the indoor unit.

[0010] Furthermore, the shell includes a panel, the grille assembly is connected to the panel, the panel includes a rear panel and a front panel, and the rear panel extends from the grille assembly to the rear side of the indoor unit along the front-to-back direction of the indoor unit, and the rear panel gradually tilts up from the front to the rear direction, the front panel is connected to the rear panel and is surrounded by the rear panel to form the air inlet, the air outlet is arranged on the front panel, the front panel extends from the grille assembly to the front side of the indoor unit, and the front panel gradually tilts up from the rear to the front direction.

[0011] Furthermore, the bottom contour line of the rear panel and the bottom contour line of the front panel are smoothly transitioned to the bottom contour line of the grille assembly.

[0012] Furthermore, the bottom contour line of the grille assembly extends rearward from a center dividing plane in the front-to-rear direction of the indoor unit, and a total contour line formed by the bottom contour line of the rear panel and the bottom contour line of the grille assembly is axially symmetrical with the bottom contour line of the front panel about the center dividing plane.

[0013] Furthermore, the indoor unit also includes a crossflow fan wheel, which is arranged in the air duct and located between the indoor heat exchanger and the air outlet, wherein the distance between two adjacent grille bars gradually increases along the direction approaching the crossflow fan wheel.

[0014] Furthermore, the indoor heat exchanger has a windward surface, and each of the grille bars has at least one inclined surface, wherein a fourth angle is formed between the inclined surface and the windward surface, and the fourth angle is not less than 85 degrees and not more than 95 degrees.

[0015] Furthermore, the number of the inclined surfaces of each of the grille bars is two, and both of the two inclined surfaces form the fourth angle with the windward surface.

[0016] Furthermore, projections of the plurality of grille bars do not overlap in the height direction of the indoor unit.

[0017] Furthermore, the shell includes a panel, the grille assembly also includes a grille frame, the grille frame is mounted on the panel, and the grille bars are mounted on the grille frame.

[0018] Furthermore, the panel has a plurality of hook holes, the grille frame includes a plurality of hook connectors, the hook connectors cooperate with the hook holes so that the grille assembly is installed on the panel, and / or, the panel has a plurality of clip holes, the grille frame includes a plurality of clip connectors, the clip connectors are clipped into the clip holes so that the grille assembly is installed on the panel.

[0019] Furthermore, the grille assembly further comprises a plurality of reinforcing ribs, the reinforcing ribs are arranged at intervals along the length direction of the grille frame, and each of the reinforcing ribs has a mounting groove adapted to the grille bar, and the grille bar is mounted in the mounting groove.

[0020] Furthermore, the grille frame, the reinforcing ribs and the grille bars are an integrated component.

[0021] Furthermore, the indoor unit also includes a filter, which is arranged between the grille assembly and the indoor heat exchanger and installed at the air inlet.

[0022] A second aspect of an embodiment of the present application provides a HVAC device, which includes an indoor unit and an outdoor unit as described in any one of the above items, and the outdoor unit and the indoor unit form a circulation flow path.

[0023] The embodiment of the present application provides an indoor unit and a heating and ventilation device, wherein a plurality of grille bars are arranged in an arc-shaped interval arrangement, and the whole formed by the plurality of grille bars protrudes outward in a direction away from the indoor heat exchanger. Thus, on the one hand, the airflow can directly exchange heat with the indoor heat exchanger through the grille air inlet, and the path of the airflow flowing into the air duct from the position close to the crossflow fan wheel becomes shorter, so that the airflow can effectively enter the air duct and exchange heat with the indoor heat exchanger, thereby improving the heat exchange efficiency of the indoor unit; on the other hand, the whole formed by the plurality of grille bars protrudes outward in a direction away from the indoor heat exchanger, that is, each grille bar extends obliquely from top to bottom, so that the airflow can smoothly enter the air inlet, thereby increasing the air intake of the airflow, and increasing the area in the air duct that can accommodate the air intake. When the power or power consumption of the crossflow fan wheel is the same, due to the increase in the air intake of the airflow and the increase in the area in the air duct that can accommodate the air intake, the airflow circulates faster in the air duct, so that the crossflow fan wheel has a higher efficiency in converting electrical energy into wind energy, thereby improving the aerodynamic efficiency of the air duct. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] In order to more clearly illustrate the technical solutions in the embodiments of the present application or related technologies, the drawings required for use in the embodiments or descriptions of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present application. For those skilled in the art, other drawings can be obtained based on these drawings without paying any creative work.

[0025] Figure 1 This is a schematic diagram of the structure of an indoor unit in an embodiment of the present application;

[0026] Figure 2 This is a structural schematic diagram of an indoor unit in an embodiment of the present application from another perspective;

[0027] Figure 3 for Figure 2 The schematic cross-sectional structure diagram of the indoor unit along the DD section is shown;

[0028] Figure 4 for Figure 3 A partial enlarged structural diagram of the indoor unit shown in FIG.

[0029] Figure 5 A streamline diagram of airflow in one embodiment of the present application;

[0030] Figure 6 This is a schematic diagram of the exploded structure of an indoor unit in one embodiment of the present application;

[0031] Figure 7 This is a partial structural diagram of an indoor unit in an embodiment of the present application;

[0032] Figure 8 This is a partial structural schematic diagram of a grille assembly in one embodiment of the present application;

[0033] Fig. 9 This is a schematic diagram of a partial structure of a panel in an embodiment of the present application.

[0034] Explanation of the accompanying drawings: 1-indoor unit; 10-shell; 10a-air inlet; 10b-air outlet; 10c-air duct; 10d-center dividing surface; 11-casing; 12-panel; 12a-hook hole; 12b-clamp hole; 12c-filter mesh slot; 121-first connecting surface; 122-second connecting surface; 20-indoor heat exchanger; 21-windward surface; 30-grille assembly; 30a-grille air inlet; 31-grille bar; 311-inclined surface; 312-front side grille bar; 313-rear side grille bar; 32-grille frame; 321-hook piece; 322-clamp piece; 33-reinforcement rib; 40-crossflow impeller; 50-filter mesh; 60-water receiving tray; 61-main water receiving tray; 62-auxiliary water receiving tray. DETAILED DESCRIPTION

[0035] In order to make the purpose, technical solution and advantages of the present application more clearly understood, the present application is further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present application and are not used to limit the present application.

[0036] An embodiment of the present application provides a HVAC device, which may include an outdoor unit and an indoor unit. The outdoor unit is usually installed outside the target space, and the indoor unit is usually installed inside the target space. The outdoor unit and the indoor unit work together. It can be understood that the outdoor unit and the indoor unit can form a circulation flow path to achieve the cooling, heating, dehumidification and air purification effects of the HVAC equipment on the target space, thereby achieving a comfortable target space. Among them, the outdoor unit of the HVAC equipment can be one, and the indoor unit can be multiple, and the embodiment of the present application does not make specific limitations on this.

[0037] See also Figure 1-Figure 3 In some embodiments of the present application, the indoor unit 1 may include a housing 10 , an indoor heat exchanger 20 , and a grille assembly 30 .

[0038] Specifically, the housing 10 is provided with an air inlet 10a and an air outlet 10b at intervals on the bottom surface, wherein the number of the air inlet 10a and the air outlet 10b may be one or more, and the embodiment of the present application does not limit this. For example, the number of the air inlet 10a in the indoor unit 1 may be 2, and the number of the air outlet 10b may be 1. The interior of the housing 10 is provided with an air duct 10c connecting the air inlet 10a and the air outlet 10b, and multiple components may be installed inside the air duct 10c, and the housing 10 may protect the components installed in the air duct 10c.

[0039] See also Figure 3The indoor heat exchanger 20 is arranged in the air duct 10c, and the indoor heat exchanger 20 is inclined in the air duct 10c so that the indoor heat exchanger 20 is at least partially arranged opposite to the air inlet 10a. The indoor heat exchanger 20 is a device for transferring heat between two or more fluids. The main purpose of the indoor heat exchanger 20 is to transfer heat from one fluid to another fluid to achieve the effect of cooling, heating or temperature regulation. That is, when two fluids pass through the indoor heat exchanger 20 at different temperatures, heat will be transferred from the fluid with higher temperature to the fluid with lower temperature, so that heat is transferred between the fluids to achieve thermal balance. Among them, the indoor heat exchanger 20 is usually composed of a series of pipes, tube bundles or plates, which are used to promote heat transfer between heat sources or heat carriers. There are many types of indoor heat exchangers 20. For example, the indoor heat exchanger 20 can be divided into a partition-type indoor heat exchanger, a hybrid indoor heat exchanger and a heat storage indoor heat exchanger according to the principle and method of heat exchange between cold and hot fluids. The embodiment of the present application does not make specific limitations on this.

[0040] See also Figure 1-Figure 3 The grille assembly 30 is arranged at the air inlet 10a, so that the grille assembly 30 can cover and shield the air inlet 10a, so as to prevent foreign objects such as flocculent impurities from entering the housing 10 through the air inlet 10a, causing dust to accumulate on the surface of the indoor heat exchanger 20, or causing damage to the indoor heat exchanger 20, thereby ensuring the environmental hygiene and service life of the indoor heat exchanger 20. And because the grille assembly 30 shields the air inlet 10a, the grille assembly 30 can bring wind resistance at the air inlet 10a, so as to avoid large noise at the air inlet 10a, that is, the noise of the airflow at the air inlet 10a can be reduced.

[0041] See also Figure 2-Figure 3 Specifically, the grille assembly 30 may include a plurality of grille bars 31 that are arranged at intervals in an arc shape. The grille bars 31 may be in the shape of long strips, so that the grille bars 31 can be easily processed. Of course, the grille bars 31 may also be in other shapes, and the embodiment of the present application does not specifically limit this. Since the grille bars 31 are arranged at intervals, a gap may be formed between two adjacent grille bars 31. It can be understood that the gap formed between the two grille bars 31 is to subdivide the air inlet 10a opened in the shell 10 into a plurality of grille air inlets 30a, and the airflow may flow from the plurality of grille air inlets 30a to the air duct 10c.

[0042] See also Figure 3 In some embodiments, the indoor unit 1 may further include a crossflow fan wheel 40, which is disposed in the air duct 10c. The crossflow fan wheel 40 may drive the air flow transmission in the air duct 10c, and the number of the crossflow fan wheels 40 may be one or more, which is not limited in the embodiments of the present application.

[0043] Specifically, when the crossflow wind wheel 40 is located between the indoor heat exchanger 20 and the air outlet 10b, the airflow can flow in from the multiple grille air inlets 30a and pass through the indoor heat exchanger 20 for heat exchange. The airflow after heat exchange can flow through the crossflow wind wheel 40. The crossflow wind wheel 40 can rotate to do work on the airflow after heat exchange and transport it to the air outlet 10b for outflow, thereby realizing cooling or heating of the HVAC equipment.

[0044] Please continue reading Figure 3 , further, the plurality of grille bars 31 are arranged in an arc shape at intervals, that is, the entire grille assembly 30 is arranged in an arc shape, so that the grille assembly 30 gradually becomes thinner in the front-to-back direction BB away from the indoor heat exchanger 20, so that the entire body of the indoor unit 1 can be relatively light, thin and slim. Compared with the entire body formed by the plurality of grille bars 31 being concave in the direction close to the indoor heat exchanger 20, the entire body formed by the plurality of grille bars 31 is convex in the direction away from the indoor heat exchanger 20, that is, each grille bar 31 extends obliquely from top to bottom, so that the airflow enters smoothly at the air inlet 10a, thereby increasing the airflow intake, and increasing the area in the air duct 10c that can accommodate the air intake. Under the condition that the power or power consumption of the crossflow impeller 40 is the same, due to the increase in the airflow intake and the increase in the area in the air duct 10c that can accommodate the air intake, the airflow circulates faster in the air duct 10c, so that the crossflow impeller 40 has a higher working efficiency in converting electrical energy into wind energy, thereby improving the aerodynamic efficiency of the air duct 10c.

[0045] Furthermore, by arranging a plurality of grille bars 31 in an arc-shaped interval arrangement, the path of the airflow flowing into the air duct 10c near the cross-flow impeller 40 is shortened. It can be understood that when the airflow flows into the air duct 10c through the grille air inlet 30a, since the indoor heat exchanger 20 is tilted in the air duct 10c and the indoor heat exchanger 20 is at least partially arranged opposite to the air inlet 10a, the airflow can exchange heat with the indoor heat exchanger 20 directly through the grille air inlet 30a, and the path of the airflow flowing into the air duct 10c near the cross-flow impeller 40 is shortened, so that the airflow can effectively enter the air duct 10c and exchange heat with the indoor heat exchanger 20, thereby improving the heat exchange efficiency of the indoor unit 1.

[0046] In the embodiment of the present application, a plurality of grille bars 31 are arranged in an arc shape at intervals, and the whole formed by the plurality of grille bars 31 is convex in a direction away from the indoor heat exchanger 20. In this way, on the one hand, the airflow can directly exchange heat with the indoor heat exchanger 20 through the grille air inlet 30a, and the path of the airflow flowing into the air duct 10c from the position close to the crossflow impeller 40 becomes shorter, so that the airflow can effectively enter the air duct 10c to exchange heat with the indoor heat exchanger 20, thereby improving the heat exchange efficiency of the indoor unit 1; on the other hand, the whole formed by the plurality of grille bars 31 is convex in a direction away from the indoor heat exchanger 20. The direction of the heat exchanger 20 is convex, that is, each grille bar 31 extends obliquely from top to bottom, so that the airflow can enter the air inlet 10a smoothly, thereby increasing the air intake volume of the airflow, and the area that can accommodate the air intake in the air duct 10c is increased. When the power or power consumption of the cross-flow fan 40 is the same, due to the increase in the air intake volume of the airflow and the increase in the area that can accommodate the air intake in the air duct 10c, the airflow circulates faster in the air duct 10c, so that the cross-flow fan 40 can convert electrical energy into wind energy with higher efficiency, thereby improving the aerodynamic efficiency of the air duct 10c.

[0047] Please continue reading Figure 3 In some embodiments, the plurality of grille bars 31 may be arranged along the front-to-back direction BB of the indoor unit 1, and from the front to the rear, the whole formed by the plurality of grille bars 31 gradually tilts toward the indoor unit 1, that is, the plurality of grille bars 31 are arranged in an arc shape and gradually tilts toward the indoor unit 1, so that the grille bars 31 are gradually thinned from the front to the rear, so that the overall body of the indoor unit 1 is relatively light and thin.

[0048] In some embodiments, the housing 10 may include a panel 12, and the grille assembly 30 is connected to the panel 12, that is, the grille assembly 30 may be installed on the panel 12 by screwing or snapping, and the panel 12 may include a rear panel and a front panel.

[0049] Specifically, along the front-to-back direction BB of the indoor unit 1, the rear panel extends from the grille assembly 30 to the rear side of the indoor unit 1, and the rear panel gradually tilts up from the front to the rear direction, so that the rear panel gradually becomes thinner along the direction from the front to the rear. The front panel is connected to the rear panel, that is, the front panel and the rear panel can be formed as one body to form the entire panel 12, and the front panel and the rear panel are surrounded to form an air inlet 10a, and the air outlet 10b is provided on the front panel, and the front panel extends from the grille assembly 30 to the front side of the indoor unit 1, and the front panel gradually tilts up from the rear to the front direction, so that the front panel gradually becomes thinner along the direction from the rear to the front, thereby realizing that the panel 12 gradually becomes thinner along the front-to-back direction BB, so that the overall body of the indoor unit 1 is relatively light and thin.

[0050] Furthermore, in some embodiments, the bottom contour line of the rear panel and the bottom contour line of the front panel both smoothly transition with the bottom contour line of the grille assembly 30, that is, the bottom contour line of the panel 12 is smoothly connected with the bottom contour line of the grille assembly 30 to avoid the grille bars 31 protruding from the bottom surface of the shell 10, thus avoiding scratches by the grille bars 31.

[0051] Please continue reading Figure 3 Furthermore, in some embodiments, the bottom contour line of the grille assembly 30 extends from the center dividing plane 10d in the front-to-back direction of the indoor unit 1 to the rear side, and the bottom contour line of the rear panel and the bottom contour line of the grille assembly 30 constitute a total contour line, and the total contour line and the bottom contour line of the front panel are symmetrically arranged about the center dividing plane 10d. It can be understood that the center dividing plane 10d can divide the panel 12 into two sides, one side is the front panel, and the other side is the rear panel, and in the front-to-back direction BB of the indoor unit 1, the bottom contour line of the panel 12 gradually bends from the center dividing plane 10d to the front-to-back direction BB of the indoor unit 1, and the curvature of the bend is centrally symmetrically arranged about the center dividing plane 10d, so that the overall body of the indoor unit 1 is thick in the middle and gradually thins on both sides. In this way, the overall body of the indoor unit 1 is relatively light and thin.

[0052] In some embodiments, the connecting line at the bottom ends of all the grille bars 31 is an arc line, that is, the bottom ends of all the grille bars 31 are connected, and because the grille bars 31 are arranged in an arc shape, the connecting line at the bottom ends of all the grille bars 31 is an arc line, and the arc line smoothly transitions to the bottom surface of the indoor unit 1 at the rear end and the front end in the front-to-back direction BB of the indoor unit 1. It can be understood that the grille bars 31 are smoothly connected to the bottom surface of the shell 10 to avoid the grille bars 31 protruding from the bottom surface of the shell 10, thereby avoiding being scratched by the grille bars 31.

[0053] In some embodiments, the grille assembly 30 may include a first grille bar group and a second grille bar group divided into equal lengths along the front-to-back direction BB of the indoor unit 1, the first grille bar group being closer to the air outlet 10b than the second grille bar group, wherein the curvature of the first grille bar group is smaller than the curvature of the second grille bar group. It can be understood that the bending variation range of the first grille bar group closer to the air outlet 10b is smaller, while the bending variation range of the second grille bar group away from the air outlet 10b is larger, so that the grille assembly 30 is arranged in an arc shape, and the curvature of the grille assembly 30 is larger as the indoor unit 1 points from front to back, and thus the grille assembly 30 gradually becomes thinner along the rear side direction close to the indoor unit 1, so that the overall body of the indoor unit 1 is relatively light and thin.

[0054] See also Figure 3-Figure 4In some embodiments, along the front-to-back direction BB of the indoor unit 1, the grille bars 31 may include a front grille bar 312 closest to the front side of the indoor unit 1, and a rear grille bar 313 closest to the rear side of the indoor unit 1, and the front grille bar 312 is lower than the rear grille bar 313, so that the plurality of grille bars 31 are arranged in an arc shape, and further, there is a height difference H between the front grille bar 312 and the rear grille bar 313, so that the whole formed by the plurality of grille bars 31 bulges outward in a direction away from the indoor heat exchanger 20, and the height difference H between the front grille bar 312 and the rear grille bar 313 is not less than 10 mm and not more than 20 mm. For example, the height difference H between the front grille bars 312 and the rear grille bars 313 can be 10 mm, 15 mm, or 20 mm. In this way, the airflow can flow smoothly into the air inlet 10a, thereby increasing the air intake volume of the airflow and the area in the air duct 10c that can accommodate the air intake volume. When the power or power consumption of the crossflow impeller 40 is the same, due to the increase in the air intake volume of the airflow and the increase in the area in the air duct 10c that can accommodate the air intake volume, the airflow circulates faster in the air duct 10c, so that the crossflow impeller 40 can convert electrical energy into wind energy more efficiently, thereby improving the aerodynamic efficiency of the air duct 10c.

[0055] If the height difference H between the front grille bar 312 and the rear grille bar 313 is less than 10 mm, at this time, since the height difference H between the front grille bar 312 and the rear grille bar 313 is small, the airflow is easily blocked by the grille bar 31, thereby reducing the air intake volume of the airflow; if the height difference H between the front grille bar 312 and the rear grille bar 313 is greater than 20 mm, at this time, the height difference H between the front grille bar 312 and the rear grille bar 313 is large, so that the curvature of the grille assembly 30 is large. During the transportation of the indoor unit 1, the grille assembly 30 is easily damaged due to the large curvature of the grille assembly 30.

[0056] See also Figure 3In some embodiments, the indoor unit 1 may further include a water receiving pan 60, wherein the water receiving pan 60 may include a main water receiving pan 61 and an auxiliary water receiving pan 62, the main water receiving pan 61 is arranged at the bottom of the indoor heat exchanger 20, the auxiliary water receiving pan 62 is arranged below the indoor heat exchanger 20 and communicates with the main water receiving pan 61, and the auxiliary water receiving pan 62 is located between the indoor heat exchanger 20 and the air inlet 10a. When the indoor unit 1 is working, the airflow flows from the multiple grille air inlets 30a into the air duct 10c and exchanges heat with the indoor heat exchanger 20. Due to the indoor unit heat exchanger There is a temperature difference between the indoor heat exchanger 20 and the atmospheric air, so that condensed water will appear on the indoor heat exchanger 20, and the condensed water will drip downward under the action of its own gravity, and by arranging the auxiliary water receiving tray 62 under the indoor heat exchanger 20, not only can the auxiliary water receiving tray 62 receive the condensed water dripping from the indoor heat exchanger 20, but the condensed water received by the auxiliary water receiving tray 62 can be guided into the main water receiving tray 61, and the auxiliary water receiving tray 62 can also be avoided from being arranged at the air inlet 10a to affect the airflow from the multiple grille air inlets 30a into the air duct 10c.

[0057] See also Figure 3-Figure 4 Further, in some embodiments, a first angle α is formed between a connecting line between the vertices of the front grille bars 312 and the vertices of the rear grille bars 313 and a horizontal plane, wherein the first angle α is not less than 5 degrees and not greater than 15 degrees. For example, the first angle α may be 5 degrees, 10 degrees, or 15 degrees. In this way, the airflow can flow smoothly through the grille air inlet 30a, thereby increasing the airflow volume, and increasing the area of ​​the air duct 10c that accommodates the airflow volume. When the power or power consumption of the crossflow impeller 40 is the same, the airflow volume increases and the airflow volume accommodated in the air duct 10c increases. The area is increased, so the airflow circulates faster in the air duct 10c, so that the crossflow impeller 40 can convert electrical energy into wind energy more efficiently, thereby improving the aerodynamic efficiency of the air duct 10c; if the first angle α is less than 5 degrees, it is easy for multiple grille bars 31 to be arranged in parallel, resulting in the airflow being blocked by the grille bars 31; if the first angle α is greater than 15 degrees, and the indoor heat exchanger 20 is tilted in the air duct 10c, so that the windward surface 21 may be closer to the air inlet 10a, when the auxiliary water receiving tray 62 is full of condensed water, it is easy for condensed water to drip from the air inlet 10a to the outside of the indoor unit 1.

[0058] Please continue reading Figure 3-Figure 4In other embodiments, a second angle β is formed between the connecting straight line between the vertices of the front grille bars 312 and the vertices of the rear grille bars 313 and the windward surface 21 of the indoor heat exchanger 20. The second angle β is not less than 20 degrees and not greater than 40 degrees. For example, the second angle β can be 20 degrees, 30 degrees, or 40 degrees. In this way, on the one hand, the auxiliary water receiving pan 62 can be prevented from receiving condensed water and dripping outside the indoor unit 1. On the other hand, the air flow can be smoothly fed into the grille air inlet 30a.

[0059] If the second angle β is less than 20 degrees, and the indoor heat exchanger 20 is tilted in the air duct 10c, so when the second angle β is smaller, the windward surface 21 may be closer to the air inlet 10a. When the auxiliary water receiving tray 62 is full of condensed water, it is easy to cause condensed water to drip from the air inlet 10a to the outside of the indoor unit 1. If the second angle β is greater than 40 degrees, and the first angle α needs to be within the range of not less than 5 degrees and not more than 15 degrees, and the grille assembly 30 includes a plurality of grille bars 31 arranged in an arc shape, so the second angle β is larger, which easily leads to a smaller curvature of the whole formed by the plurality of grille bars 31, so that the whole formed by the grille bars 31 is arranged in parallel, thereby causing the airflow to be blocked by the grille bars 31.

[0060] Please continue reading Figure 3-Figure 4 In some other embodiments, a third angle θ is provided between the windward surface 21 of the indoor heat exchanger 20 and the horizontal plane, that is, the sum of the first angle α and the second angle β may be the third angle θ, and the third angle θ is not less than 25 degrees and not greater than 45 degrees. For example, the third angle θ may be 25 degrees, 35 degrees, or 45 degrees. Thus, on the one hand, the overall thickness of the indoor unit 1 along the height direction CC may be thinner to improve the application scenario of the indoor unit 1. On the other hand, at this time, the indoor heat exchanger 20 is arranged close to the air inlet 10a. Driven by the crossflow impeller 40, the airflow may enter the air duct 10c from the air inlet 10a and directly exchange heat with the indoor heat exchanger 20, thereby improving the heat exchange efficiency.

[0061] If the third angle θ is less than 25 degrees, since the auxiliary water receiving pan 62 is arranged below the indoor heat exchanger 20, when the third angle θ is small, the auxiliary water receiving pan 62 is closer to the air inlet 10a, which easily causes the condensed water received by the auxiliary water receiving pan 62 to drip from the air inlet 10a to the outside of the indoor unit 1. If the third angle θ is greater than 45 degrees, the indoor heat exchanger 20 can be vertically arranged in the height direction CC, resulting in a thicker overall thickness of the indoor unit 1 along the height direction CC.

[0062] Please continue reading Figure 3-Figure 4In some embodiments, the indoor heat exchanger 20 has a windward surface 21, each grille bar 31 has at least one inclined surface 311, and a fourth angle δ is formed between the windward surface 21 and the inclined surface 311, and the fourth angle δ is not less than 85 degrees and not greater than 95 degrees. For example, the fourth angle δ can be 85 degrees, 90 degrees, or 95 degrees. In this way, when the indoor unit 1 is working, the airflow can flow from the multiple grille air inlets 30a to the air duct 10c, and the fourth angle δ between the windward surface 21 of the indoor heat exchanger 20 and the inclined surface 311 of the grille bar 31 is set to be within the range of not less than 85 and not greater than 95 degrees, that is, the inclination direction of the grille bar 31 matches the flow direction of the airflow, so that the air intake volume of the airflow is large, and the airflow can effectively enter the air duct 10c and exchange heat with the indoor heat exchanger 20, thereby improving the heat exchange efficiency of the indoor unit 1. In addition, the inclined surface 311 of the grille bar 31 can be set at an angle with the indoor heat exchanger 20, and the range of the fourth angle δ is not less than 85 and not more than 95 degrees, so that the airflow can flow from the multiple grille air inlets 30a to the air duct 10c, that is, the airflow is less obstructed by the grille bars 31, so that the air intake volume of the airflow is increased. When the power or power consumption of the cross-flow fan 40 is the same, the airflow can circulate faster in the air duct 10c due to the increase in the air intake volume, so that the cross-flow fan 40 can convert electrical energy into wind energy with higher efficiency, thereby improving the aerodynamic efficiency of the air duct 10c.

[0063] Preferably, the fourth angle δ can be set to 90 degrees, so that the flow direction of the airflow at the air inlet 10a is arranged perpendicular to the windward surface 21 of the indoor heat exchanger 20, so that the airflow is less obstructed by the grille bars 31, and the air intake volume of the airflow is increased. When the power or power consumption of the cross-flow fan 40 is the same, the airflow can circulate faster in the air duct 10c due to the increase in the air intake volume, so that the cross-flow fan 40 can convert electrical energy into wind energy with higher efficiency, thereby improving the aerodynamic efficiency of the air duct 10c.

[0064] When the fourth angle δ is greater than 95 degrees, the fourth angle δ between the windward surface 21 of the indoor heat exchanger 20 and the inclined surface 311 of the grille bar 31 is relatively large. On the one hand, the indoor heat exchanger 20 will occupy a larger area in the air duct 10c, which is not conducive to the miniaturization of the indoor unit 1, thereby limiting the application scenarios of the indoor unit 1. On the other hand, when the airflow flows in from multiple grille air inlets 30a, the airflow may be blocked by the grille bars 31, resulting in a decrease in the air intake volume. When the power or power consumption of the cross-flow fan 40 is constant, the air intake volume of the airflow is small, so the airflow circulates slowly in the air duct 10c, so that the efficiency of the cross-flow fan 40 in converting electrical energy into the air duct is slowed down, thereby reducing the aerodynamic efficiency of the air duct 10c.

[0065] When the fourth angle δ is less than 85 degrees, the fourth angle δ between the windward surface 21 of the indoor heat exchanger 20 and the inclined surface 311 of the grille bar 31 is relatively small, that is, when the airflow can flow in from the grille air inlet 30a, the airflow may be blocked by the grille bar 31, so that the airflow that can flow into the air duct 10a from the grille air inlet 30a is reduced. When the power or power consumption of the cross-flow fan 40 is constant, the airflow circulates slower in the air duct 10c due to the smaller air intake volume, so that the working efficiency of the cross-flow fan 40 in converting electrical energy into the air duct is slowed down, thereby reducing the aerodynamic efficiency of the air duct 10c.

[0066] Please continue reading Figure 3-Figure 4 In some embodiments, each grille bar 31 may have two inclined surfaces 311, and the two inclined surfaces 311 have a fourth angle δ with the windward surface 21 of the indoor heat exchanger 20, that is, the two inclined surfaces 311 may be arranged in parallel, and the angle formed by the two inclined surfaces 311 on the grille bar 31 and the indoor heat exchanger 20 is the fourth angle δ, so that the airflow from the air inlet 10a into the air duct 10c is smoother, that is, the airflow is less blocked by the grille bar 31, thereby increasing the air intake of the indoor unit 1.

[0067] Please continue reading Figure 3-Figure 4 In some embodiments, when the crossflow fan wheel 40 is located between the indoor heat exchanger 20 and the air outlet 10b, the distance between two adjacent grille bars 31 gradually increases along the direction close to the crossflow fan wheel 40. It can be understood that since the crossflow fan wheel 40 can drive the air flow transmission in the air duct 10c, the closer to the crossflow fan wheel 40, the higher the flow rate of the airflow is. However, due to the existence of the grille bars 31, the airflow may be blocked by the grille bars 31 when entering the air duct 10c from the air inlet 10a, resulting in a large wind resistance caused by the grille bars 31. Therefore, by setting the direction close to the crossflow fan wheel 40, the distance between two adjacent grille bars 31 gradually increases to reduce the problem of large wind resistance caused by the grille bars 31, thereby increasing the air intake volume of the airflow. When the power or power consumption of the crossflow fan wheel 40 is the same, due to the increase in the air intake volume of the airflow, the airflow can circulate faster in the air duct 10c, so that the crossflow fan wheel 40 can convert electrical energy into wind energy with higher efficiency, thereby improving the aerodynamic efficiency of the air duct 10c.

[0068] See also Figure 3-Figure 5 In some embodiments, the projections of the plurality of grille bars 31 do not overlap in the height direction CC of the indoor unit 1, that is, the grille air inlet 30a formed by two adjacent grille bars 31 is enlarged so that the airflow from the grille air inlet 30a into the air duct 10c is smoother and more uniform, thereby increasing the air intake volume of the indoor unit 1.

[0069] See also Figure 6 In some embodiments, the housing 10 may include a casing 11 and a panel 12. The casing 11 may be arranged in a rectangular shape, and the panel 12 is arranged on the bottom surface of the casing 11 and cooperates with the casing 11 to form an air duct 10c. An air inlet 10a and an air outlet 10b are arranged on the panel 12. It can be understood that the indoor unit 1 can take in air from the air inlet 10a of the panel 12 and exhaust air from the air outlet 10b of the panel 12, wherein the air inlet 10a and the air outlet 10b can be respectively opened on both sides of the panel 12.

[0070] Please continue to refer to 6. Further, the grille assembly 30 also includes a grille frame 32, the grille frame 32 is installed on the panel 12, and the grille bars 31 are installed on the grille frame 32, wherein the grille frame 32 can be arranged in a rectangular shape, and the grille frame 32 can include four borders, the four borders can be arranged to form a rectangular frame, and a plurality of grille bars 31 can be arranged at intervals in the rectangular frame so that the grille bars 31 are installed on the grille frame 32, wherein the grille bars 31 and the grille frame 32 can be detachably connected, or can be an integral component, and the embodiment of the present application does not specifically limit the connection form of the grille bars 31 and the grille frame 32.

[0071] Exemplarily, when the grille bars 31 are detachably connected to the grille frame 32 , if only one or more of the grille bars 31 are damaged, only the damaged grille bars 31 need to be replaced, thus saving the maintenance cost of the indoor unit 1 .

[0072] Exemplarily, when the grille bars 31 and the grille frame 32 are integral components, in actual production, the process of forming the grille bars 31 and the grille frame 32 can be facilitated, and the whole formed by the grille bars 31 and the grille frame 32 can be directly installed on the panel 12, thus improving the convenience of installing the indoor unit 1.

[0073] See also Figure 7-Figure 9 Further, in some embodiments, the panel 12 has a plurality of hook holes 12a, and the grille frame 32 includes a plurality of hook members 321, that is, the panel 12 may be provided with a plurality of hook holes 12a at intervals, and the frame of the grille frame 32 may be provided with a plurality of hook members 321 at intervals, wherein each hook member 321 cooperates with the corresponding hook hole 12a so that the grille assembly 30 is installed on the panel 12, and since the grille assembly 30 is installed on the panel 12 by hooking, the convenience of installing and disassembling the grille assembly 30 can be improved.

[0074] Please continue reading Figure 7-Figure 9In some other embodiments, the panel 12 has a plurality of snap-in holes 12b, and the grille frame 32 includes a plurality of snap-in parts 322, that is, a plurality of snap-in holes 12b may be arranged at intervals on the panel 12, and a plurality of snap-in parts 322 may be arranged at intervals on the frame of the grille frame 32, and each snap-in part 322 may be snap-fitted into a corresponding snap-in hole 12b to enable the grille assembly 30 to be installed on the panel 12. Furthermore, since the grille assembly 30 and the panel 12 are connected by snapping, the accuracy of the installation of the grille assembly 30 and the panel 12 can be improved.

[0075] Please continue reading Figure 7-Figure 9 In other embodiments, the panel 12 may have multiple hook holes 12a and snap holes 12b at the same time, and the grille frame 32 includes multiple hook members 321 and snap members 322. Multiple hook holes 12a cooperate with the hook members 321, and multiple snap holes 12b cooperate with the snap members 322. In this way, the stability of the installation of the grille assembly 30 and the panel 12 can be improved.

[0076] It should be noted that the grille assembly 30 and the panel 12 may also be connected in other forms, and are not limited to the hooking and snapping of the grille assembly 30 and the panel 12 , and the embodiment of the present application does not specifically limit this.

[0077] See also Figure 7 In some embodiments, the grille assembly 30 further includes a plurality of reinforcing ribs 33, and the plurality of reinforcing ribs 33 are spaced apart along the length direction AA of the grille frame 32, that is, a plurality of reinforcing ribs 33 can be spaced apart along the length direction AA of the grille frame 32 within a rectangular frame defined by four frames of the grille frame 32, and each reinforcing rib 33 has a mounting groove (not shown in the figure) adapted to the grille bar 31, and the grille bar 31 can be installed in the mounting groove. It can be understood that each reinforcing rib 33 can have a plurality of mounting grooves, and each grille bar 31 can be installed in one mounting groove, so that the strength of the grille bar 31 in the front-to-back direction BB is increased, thereby preventing the grille bar 31 from breaking.

[0078] See also Figure 4 Furthermore, the reinforcing ribs 33 and the adjacent grille bars 31 can be connected by a smooth transition, that is, the adjacent mounting grooves in each reinforcing rib 33 are connected by a smooth transition to avoid stress concentration on the grille bars 31 and the reinforcing ribs 33, thereby avoiding breakage of the grille bars 31.

[0079] See also Figure 6Furthermore, in some embodiments, the grille frame 32, the reinforcement ribs 33 and the grille bars 31 can be an integrated component. It can be understood that the grille frame 32, the reinforcement ribs 33 and the grille bars 31 can be formed into an integrated component through an injection molding process. In this way, it is not only convenient to install the grille assembly 30 on the panel 12, improving the convenience of installing the indoor unit 1, but also can improve the stability of the structure of the grille assembly 30.

[0080] It should be noted that the grille frame 32, the reinforcement ribs 33 and the grille bars 31 can also be connected by a detachable connection method such as snap-on, screw-on, etc. When at least one of the grille frame 32, the reinforcement ribs 33 or the grille bars 31 is damaged and needs to be replaced, only the damaged component of the grille assembly 30 needs to be replaced, and there is no need to replace the entire grille assembly 30. In this way, the maintenance cost of the indoor unit 1 can be saved, and disassembly and replacement are unnecessary.

[0081] See also Figure 3 as well as Figure 5 In some embodiments, the indoor unit 1 further includes a filter 50 , which may be a rectangular mesh structure. The filter 50 may be used to filter dust in the air to prevent dust in the air from entering the air duct 10 c and affecting the indoor heat exchanger 20 .

[0082] The filter 50 is arranged between the grille assembly 30 and the indoor heat exchanger 20. When the air flow flows in from the air inlet 10a, it needs to flow through the filter 50, wherein the filter 50 can filter the incoming air flow and then exchange heat with the indoor heat exchanger 20. In this way, dust and impurities in the air flow can be prevented from entering the indoor heat exchanger 20 in the air duct 10c, thereby ensuring the cleanliness of the indoor heat exchanger 20. Moreover, since the filter 50 is arranged in a mesh shape, the filter 50 can further prevent the user's fingers from being inserted into the air duct 10c, so as to improve the safety of the use of the indoor unit 1.

[0083] See also Figure 4 as well as Fig. 9 , further, the filter 50 is installed at the air inlet 10a. The panel 12 may include a first connection 121 and a second connection surface 122, the first connection surface 121 is provided with a hook hole 12a or a clamp hole 12b, so that the grille assembly 30 is installed on the first connection surface 121, and the second connection surface 122 also has a filter mesh slot 12c that is staggered with the hook hole 12a or the clamp hole 12b provided on the first connection surface 121, and the filter mesh 50 includes a filter mesh mounting member (not shown in the figure) that cooperates with the filter mesh slot 12c, wherein the filter mesh slot 12c and the filter mesh mounting member cooperate with each other, so that the filter mesh 50 is installed on the panel 12, and the filter mesh 50, the grille assembly 30 and the panel 12 are all detachably connected, so that the filter mesh 50 can be easily cleaned.

[0084] The same or similar numbers in the drawings of this embodiment correspond to the same or similar parts; in the description of this application, it should be understood that if the terms "up", "down", "left", "right", etc. indicate directions or positional relationships based on the directions or positional relationships shown in the drawings, it is only for the convenience of describing this application and simplifying the description, and does not indicate or imply that the device or element referred to must have a specific direction, be constructed and operated in a specific direction. Therefore, the terms describing the positional relationship in the drawings are only used for illustrative purposes and cannot be understood as limitations on this application. For ordinary technicians in this field, the specific meanings of the above terms can be understood according to specific circumstances.

[0085] The above are only preferred embodiments of the present application and are not intended to limit the present application. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present application should be included in the protection scope of the present application.

Claims

1. An indoor unit, characterized in that: include: A shell body, with an air inlet and an air outlet spaced apart on the bottom surface, and an air duct connecting the air inlet and the air outlet formed inside the shell body; an indoor heat exchanger, the indoor heat exchanger being arranged obliquely in the air duct and at least partially arranged opposite to the air inlet; and The grille assembly is arranged at the air inlet and includes a plurality of grille bars arranged at intervals in an arc shape. The whole formed by the plurality of grille bars protrudes outward in a direction away from the indoor heat exchanger.

2. The indoor unit according to claim 1, characterized in that: The plurality of grille bars are arranged along the front-to-back direction of the indoor unit, and from the front to the rear, the whole formed by the plurality of grille bars gradually tilts toward the indoor unit.

3. The indoor unit according to claim 1, characterized in that: The grille assembly includes a first grille bar group and a second grille bar group divided into equal lengths along the front-to-back direction of the indoor unit. The first grille bar group is closer to the air outlet than the second grille bar group, and the curvature of the first grille bar group is smaller than that of the second grille bar group.

4. The indoor unit according to claim 1, characterized in that: A plurality of the grille bars are arranged along the front-to-back direction of the indoor unit, and the grille bars include rear grille bars closest to the rear side of the indoor unit, and front grille bars closest to the front side of the indoor unit, the front grille bars are lower than the rear grille bars, and the height difference between the front grille bars and the rear grille bars is not less than 10 mm and not more than 20 mm.

5. The indoor unit according to claim 4, characterized in that: A first angle between a connecting straight line between the vertices of the front grille bars and the vertices of the rear grille bars and a horizontal plane is not less than 5 degrees and not less than 15 degrees; and / or, A second angle between a straight line connecting the vertices of the front grille bars and the vertices of the rear grille bars and the windward surface of the indoor heat exchanger is not less than 20 degrees and not more than 40 degrees, and / or, A third angle between the windward surface of the indoor heat exchanger and the horizontal plane is not less than 25 degrees and not more than 45 degrees.

6. The indoor unit according to claim 1, characterized in that: The connecting line of the bottom ends of all the grille bars is an arc line, and the rear end and the front end of the arc line in the front-rear direction of the indoor unit both smoothly transition to the bottom surface of the indoor unit.

7. The indoor unit according to claim 1, characterized in that: The housing includes a panel, the grille assembly is connected to the panel, and the panel includes: a rear panel extending from the grille assembly to the rear side of the indoor unit along the front-to-rear direction of the indoor unit, and gradually tilting from the front to the rear; and The front panel is connected to the rear panel and is surrounded by the rear panel to form the air inlet. The air outlet is arranged on the front panel. The front panel extends from the grille assembly to the front side of the indoor unit and gradually rises from the rear to the front direction.

8. The indoor unit according to claim 7, characterized in that: The bottom contour line of the rear panel and the bottom contour line of the front panel both smoothly transition to the bottom contour line of the grille assembly.

9. The indoor unit according to claim 8, characterized in that: The bottom contour line of the grille assembly extends rearward from a center dividing plane in the front-to-rear direction of the indoor unit, and a total contour line formed by a bottom contour line of the rear panel and a bottom contour line of the grille assembly is axially symmetrical with the bottom contour line of the front panel about the center dividing plane.

10. The indoor unit according to claim 1, characterized in that: The indoor unit further comprises: A crossflow impeller is disposed in the air duct and located between the indoor heat exchanger and the air outlet; Wherein, along the direction approaching the crossflow impeller, the distance between two adjacent grid bars gradually increases.

11. The indoor unit according to claim 1, characterized in that: The indoor heat exchanger has a windward surface, and each of the grille bars has at least one inclined surface; There is a fourth angle between the inclined surface and the windward surface, and the fourth angle is not less than 85 degrees and not more than 95 degrees.

12. The indoor unit according to claim 11, characterized in that: The number of the inclined surfaces of each of the grille bars is two, and both of the two inclined surfaces form the fourth angle with the windward surface.

13. The indoor unit according to claim 1, characterized in that: Projections of the plurality of grille bars do not overlap in a height direction of the indoor unit.

14. The indoor unit according to claim 1, characterized in that: The housing includes a panel, and the grille assembly further includes a grille frame, the grille frame is mounted on the panel, and the grille bars are mounted on the grille frame.

15. The indoor unit according to claim 14, characterized in that: The panel has a plurality of hook holes, and the grille frame includes a plurality of hooking members, wherein the hooking members cooperate with the hook holes so that the grille assembly is mounted on the panel; and / or, The panel is provided with a plurality of clamping holes, and the grille frame comprises a plurality of clamping parts, wherein the clamping parts are clamped in the clamping holes so that the grille assembly is installed on the panel.

16. The indoor unit according to claim 14, characterized in that: The grille assembly further comprises: A plurality of reinforcing ribs are arranged at intervals along the length direction of the grid frame, and each of the reinforcing ribs has a mounting groove matched with the grid bar, and the grid bar is installed in the mounting groove.

17. The indoor unit according to claim 16, characterized in that: The grille frame, the reinforcement ribs and the grille bars are an integrated component.

18. The indoor unit according to any one of claims 1 to 17, characterized in that: The indoor unit further comprises: The filter screen is arranged between the grille assembly and the indoor heat exchanger and installed at the air inlet.

19. A HVAC equipment, characterized in that: include: The indoor unit according to any one of claims 1 to 18; An outdoor unit forms a circulation flow path with the indoor unit.

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