Indoor unit and heating and ventilation equipment

Abstract

The invention discloses an indoor unit and a duct type air conditioner, and relates to the technical field of air conditioning equipment, and the indoor unit comprises a shell, a wind wheel and a protective grating; an air channel is formed in the shell, an air suction opening communicated with the air channel is formed in the shell, and the air suction opening is provided with a first part facing the side and a second part facing the lower portion. The wind wheel is arranged in the air duct; the protective grating is connected with the shell and covers one side of the wind wheel in the mode of covering the first part and the second part. According to the indoor unit, the air inlet area at the air suction opening can be increased, and the air inlet efficiency is improved.

Description

Technical Field

[0001] The present invention relates to the technical field of air conditioning equipment, and particularly relates to an indoor unit and a heating and ventilation equipment. Background Art

[0002] In the related art, components such as a wind wheel, an electric control box assembly, a protective grille, etc. are disposed inside the housing of an air duct unit, and an air duct is further formed inside the housing. The air duct includes an air inlet and an air outlet. During the operation of the air duct unit, the external air flow enters the interior of the indoor unit from the air inlet of the indoor unit, and the air flow is driven by the wind wheel to flow inside the air duct. However, in the prior art, the air duct unit generally adopts a single return air structure, and the air inlet is usually set to have a single orientation. Therefore, the opening area of the air inlet is small, and in order to prevent sundries from entering the interior of the indoor unit from the air inlet or to prevent users from accidentally touching the wind wheel during operation, the protective grille is usually disposed at the air inlet to block the air inlet area. Thus, the air inlet area of the air inlet is insufficient, and it is difficult to improve the air outlet efficiency of the indoor unit. Summary of the Invention

[0003] The main object of the present invention is to provide an indoor unit and a heating and ventilation equipment, which can increase the air inlet area at the air inlet and improve the air inlet efficiency.

[0004] To achieve the above object, the indoor unit proposed by the present invention includes a housing, a wind wheel, and a protective grille; an air duct is formed inside the housing and has an air inlet communicating with the air duct, and the air inlet has a first part facing the side and a second part facing the bottom; the wind wheel is disposed inside the air duct; and the protective grille is connected to the housing and covers one side of the wind wheel in a manner of covering the first part and the second part.

[0005] In some embodiments, it further includes an electric control box assembly, the electric control box assembly is disposed outside the housing and is disposed adjacent to the air inlet, and the protective grille separates the wind wheel and the electric control box assembly.

[0006] In some embodiments, the electric control box assembly is disposed at the bottom of the housing and is relatively spaced from the first part in the front-back direction of the housing.

[0007] In some embodiments, there is a gap between the protective grille and the electric control box assembly.

[0008] In some embodiments, the gap between the protective grille and the electric control box assembly is greater than 1 centimeter.

[0009] In some of these embodiments, the housing includes a first housing and a second housing connected to each other, and the first housing and the second housing cooperate to define the air duct and the air suction port; the protective grille includes at least two grille portions sequentially connected between the first housing and the second housing, and adjacent two grille portions are arranged at an angle.

[0010] In some of these embodiments, the grille portion includes a first grille portion connected to the second housing and a second grille portion connected to the first housing. The first grille portion is disposed between the wind wheel and the electronic control box assembly, and the second grille portion is disposed between the wind wheel and the air suction port; wherein, the first grille portion is parallel to a first part of the air suction port facing the side; and / or, the second grille portion is parallel to a second part of the air suction port facing the lower side.

[0011] In some of these embodiments, the housing includes a first housing and a second housing connected to each other, and the first housing and the second housing cooperate to define the air duct and the air suction port; one side of the protective grille is connected to the first housing, and the other side is connected to the first housing.

[0012] In some of these embodiments, the protective grille is arranged in an arc shape, and the distance between the protective grille and the electronic control box assembly gradually increases in the direction of a first part facing the side of the air suction port.

[0013] In some of these embodiments, a discharge port communicating with the air duct is further cooperatively defined between the first housing and the second housing, and the discharge port is horizontally oriented.

[0014] In some of these embodiments, a heat exchanger is further included. The air duct includes a fan chamber, a diffuser chamber, and a heat exchange chamber that are sequentially communicated in the air flow direction. The wind wheel is disposed in the fan chamber, and the heat exchanger is disposed in the heat exchange chamber; the second housing includes a diffuser chamber lower housing forming the bottom wall of the diffuser chamber and a water receiving tray forming the bottom wall of the heat exchange chamber; wherein, the first part faces the lower surface of the corresponding diffuser chamber part of the second housing, and in the direction from the fan chamber to the heat exchange chamber, the diffuser chamber lower housing is inclined from top to bottom, and the electronic control box assembly is installed on the lower surface of the diffuser chamber lower housing.

[0015] In some of these embodiments, an electronic control box assembly is further included. An installation cavity is recessed at the bottom of the housing. The installation cavity is located on the side of the air suction port and opens downward, and the electronic control box assembly is installed in the installation cavity from bottom to top.

[0016] In some of these embodiments, an air inlet pipe interface opening downward is further included, and the air inlet pipe interface is disposed on the periphery of the first part of the air suction port and the opening of the installation cavity.

[0017] In some embodiments, the indoor unit is installed on a ceiling, a vent is provided on the ceiling, the first part of the air intake port is vertically opposite to the vent, and the installation cavity and the electric control box assembly therein are vertically opposite to the vent.

[0018] In some of the embodiments, the vent is an inspection port of the indoor unit.

[0019] The present invention also provides a HVAC device, comprising an outdoor unit and the indoor unit, wherein the outdoor unit is connected to the indoor unit via a pipeline.

[0020] In the technical solution of the present invention, an air duct is formed in the shell of the indoor unit, and an air suction port connected to the air duct is provided, and the air suction port has a first part facing the side and a second part facing downward, that is, the air flow can enter the interior of the indoor unit through the air suction port from two different directions, greatly increasing the air inlet area at the air suction port, thereby further improving the air outlet efficiency of the indoor unit. The wind wheel is arranged in the air duct to facilitate guiding the air flowing in the air duct. In order to prevent foreign objects from entering the air duct through the air intake and polluting the interior of the indoor unit, the indoor unit is also equipped with a protective grille, which is connected to the shell and arranged adjacent to the air intake to cover one side of the wind wheel by covering the first part and the second part of the air intake. This can prevent foreign objects from being drawn into the wind wheel from the air intake and affecting the normal operation of the wind wheel. At the same time, it can also ensure the safety of the staff and improve the safety of the indoor unit when maintenance personnel reach into the indoor unit from the air intake to perform corresponding maintenance work. The increase in the air inlet area at the air intake can also increase the visualization of the interior of the indoor unit, making it easier for maintenance personnel to disassemble and maintain the internal components of the indoor unit. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on the structures shown in these drawings without paying creative work.

[0022] Figure 1 This is a side view of the internal structure of the indoor unit in one embodiment of the present application;

[0023] Figure 2a for Figure 1 A schematic diagram of the cavity structure of the indoor unit shown in FIG.

[0024] Figure 2b for Figure 1 Another structural schematic diagram of the cavity of the indoor unit shown in FIG.

[0025] Figure 3 is Figure 1 Schematic diagram of the air intake grille structure of the indoor unit shown in

[0026] Figure 4 is Figure 3 Schematic diagram of the structure of another embodiment of the air intake grille shown in

[0027] Figure 5 is Figure 1 Another schematic diagram of the side of the indoor unit shown in

[0028] Figure 6 is Figure 1 Top view of the internal structure of the indoor unit shown in

[0029] Figure 7 is Figure 1 Schematic diagram of the assembly of the side cover and side panel of the indoor unit shown in

[0030] Figure 8 Schematic diagram of the overall structure of the heating and ventilation equipment according to another embodiment of the present application.

[0031] Explanation of the reference numerals in the drawings:

[0032] Label Name Label Name 1 HVAC equipment 132 Water receiving tray 10 Indoor unit 133 Volute tongue 20 Outdoor unit 134 Front shell of the fan chamber 100 Housing 135 Lower shell of the heat exchange chamber 110 Air duct 140 Inlet air pipe interface 111 Suction air inlet 150 Ventilation opening 1111 First part 200 Impeller 1112 Second part 210 Blade 112 Air outlet 220 Side cover 113 Fan chamber 300 Protective grille 114 Diffuser chamber 310 Grille frame 115 Heat exchange chamber 311 Grille bar 116 Installation chamber 312 Grille hole 120 First housing 320 Grille part 121 Rear shell of the fan chamber 321 First grille part 122 Upper shell of the fan chamber 322 Second grille part 123 Upper shell of the diffuser chamber 400 Electric control box assembly 124 Upper shell of the heat exchange chamber 500 Heat exchanger 130 Second housing 600 Side enclosure panel 131 Lower shell of the diffuser chamber

[0033] The realization, functional features and advantages of the object of the present invention will be further described with reference to the embodiments and the accompanying drawings. Detailed implementation manners

[0034] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.

[0035] It should be noted that all the directional indications (such as up, down, left, right, front, back...) in the embodiments of the present invention are only used to explain the relative positional relationship and movement conditions between components in a specific posture (as shown in the drawings). If the specific posture changes, the directional indications will also change accordingly.

[0036] In addition, in the present invention, descriptions such as "first" and "second" are for descriptive purposes only, and should not be construed as indicating or implying their relative importance or implicitly specifying the quantity of the indicated technical features. Thus, features defined with "first" and "second" may explicitly or implicitly include at least one such feature. In the description of the present invention, "a plurality of" means at least two, such as two, three, etc., unless otherwise specifically defined.

[0037] In the present invention, unless otherwise clearly defined and limited, terms such as "connected" and "fixed" should be understood in a broad sense. For example, "fixed" can be a fixed connection, a detachable connection, or integrated; it can be a mechanical connection or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium, and can be the communication inside two components or the interaction relationship between two components, unless otherwise clearly limited. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0038] In addition, the technical solutions between various embodiments of the present invention can be combined with each other, but it must be based on the fact that those of ordinary skill in the art can implement it. When the combination of technical solutions is contradictory or cannot be implemented, it should be considered that such a combination of technical solutions does not exist and is not within the protection scope required by the present invention.

[0039] There are many types of HVAC equipment, such as air conditioners, multi-connected units, heat pumps, water heaters, etc., which are used to cool or heat the indoor environment and adjust the indoor temperature. Due to factors such as occupying less effective indoor space, low cost, and convenient maintenance, they are widely promoted and used. Most of the existing HVAC equipment on the market, such as air duct machines, includes an outdoor unit and an indoor unit. Among them, the indoor unit is generally installed before the decoration ceiling. In order to ensure the flow of air in the indoor unit and protect the internal components of the indoor unit, the housing of the indoor unit wraps most of the body, and only exposes the air inlet of the indoor unit.

[0040] The housing of the indoor unit houses components such as a wind wheel, an electric control box assembly, a protective grille, etc., and a wind duct is also formed inside the housing. The wind duct includes an air inlet and an air outlet. During the operation of the air duct machine, the outside air flows into the interior of the indoor unit from the air inlet of the indoor unit, and the wind wheel drives the air to flow in the wind duct. In order to prevent sundries from entering the interior of the indoor unit from the air inlet or prevent users from accidentally touching the wind wheel during operation, a protective grille is usually arranged at the air inlet to block the air inlet area. Moreover, the air inlet cooperates with the ventilation opening of the indoor ceiling for ventilation. To adapt to the position of the ceiling, the air inlet is usually set to a single orientation. Therefore, the opening area of the air inlet is small, that is, the air inlet area of the air inlet is small, resulting in a low air inlet efficiency. Further, the air outlet efficiency of the indoor unit is also low.

[0041] To solve the above problems, the present invention provides an indoor unit 10, which includes a housing 100, a wind wheel 200, and a protective grille 300.

[0042] Please refer to Figures 1 to 3 , in an embodiment of the present invention, the housing 100 can be made of hard materials such as sheet metal or plastic materials, which can effectively protect the internal structure of the indoor unit 10. Further, the first housing 120 not only forms the path of the air duct 110 internally but also constitutes the external configuration of the indoor unit 10 externally.

[0043] An air duct 110 is formed inside the housing 100, and an air inlet 111 communicating with the air duct 110 is provided. The wind wheel 200 is arranged inside the air duct 110 and adjacent to the air inlet 111. Among them, the air inlet 111 has a first part 1111 facing the side and a second part 1112 facing the bottom. That is, under the drive of the wind wheel 200, the air flow can enter the interior of the indoor unit 10 from the first part 1111 and the second part 1112 at two different positions. Among them, the air inlet 111 has a first part 1111 facing the side. Of course, the first part 1111 can also be opened on the first housing 120. Users can adjust the opening position and orientation of the air inlet 111 according to actual needs to adapt to different usage scenarios and spatial layouts. Since the air inlet 111 of the present application is the sum of the areas of the first part 1111 and the second part 1112, compared with the structure of a traditional air duct machine where the air inlet is only opened in one direction, the solution of the present application increases the air inlet area at the air inlet 111 in a limited space, thereby further improving the air outlet efficiency of the indoor unit 10.

[0044] In a structural form, the housing 100 includes a connected first housing 120 and a second housing 130. The air duct 110 is sandwiched between the first housing 120 and the second housing 130. The air duct 110 includes an air inlet 111, an air outlet 112, and a fan chamber 113, a diffuser chamber 114, and a heat exchange chamber 115 that are sequentially connected between the air inlet 111 and the air outlet 112. In some embodiments, such as Figure 1 shown in and Figure 2, in order to achieve miniaturization in the height direction and facilitate installation in the ceiling space, the fan chamber 113, the diffuser chamber 114, and the heat exchange chamber 115 are sequentially connected from the back to the front. The housing 100 extends longitudinally along the left - right direction, the air duct 110 inside the housing extends longitudinally along the left - right direction, and the air inlet 111, the fan chamber 113, the diffuser chamber 114, the heat exchange chamber 115, and the air outlet 112 of the air duct 110 extend longitudinally along the left - right direction.

[0045] The air inlet 111 communicates with at least one side of the fan chamber 113. Specifically, the air inlet 111 communicates with at least one of the front side, lower side, and rear side of the fan chamber 113. The air outlet 112 communicates with at least one side of the heat exchange chamber 115. Specifically, the air outlet 112 is provided on at least one of the front side, upper side, and lower side of the heat exchange chamber 115.

[0046] In some embodiments, as Figure 1 and Figure 2a shown, the first part 1111 of the air inlet 111 is located on the front side of the fan chamber 113, the second part 1112 of the air inlet 111 is located on the lower side of the fan chamber 113, and the air outlet 112 is provided on the front side of the heat exchange chamber 115. The first housing 120 and the second housing 130 cooperate to define the air duct 110 and the air inlet 111. The first housing 120 and the second housing 130 also cooperate to define the air outlet 112 that communicates with the air duct 110. The air outlet 112 is horizontally oriented.

[0047] As Figure 1 and Figure 2a shown, the first housing 120 includes a rear shell 121 of the fan chamber located at the rear side of the fan chamber 113, and a upper shell 122 of the fan chamber that bends forward and upward from the rear shell 121 of the fan chamber. The upper shell 122 of the fan chamber is arc-shaped and covers the rear side and the upper side of the fan chamber 113. An upper shell 123 of the diffuser chamber extends forward and downward from the upper shell 122 of the fan chamber, and an upper shell 124 of the heat exchange chamber extends forward from the upper shell 123 of the diffuser chamber.

[0048] As Figure 1 and Figure 2a shown, the second housing 130 includes a front shell 134 of the fan chamber located at the front side of the fan chamber 113, a lower shell 131 of the diffuser chamber located at the front side (downstream side) of the fan chamber 113, and a volute tongue 133 that transitionally connects the front shell 134 of the fan chamber and the lower shell 131 of the diffuser chamber. The volute tongue 133 guides the air flow to enter the lower shell 131 of the diffuser chamber from the fan chamber 113 and extends forward and downward. The second housing 130 further includes a lower shell 135 of the heat exchange chamber that extends forward from the lower shell 131 of the diffuser chamber.

[0049] The front shell 134 of the fan chamber and the rear shell 121 of the fan chamber are oppositely arranged. The front shell 134 of the fan chamber, the rear shell 121 of the fan chamber, and the upper shell 122 of the fan chamber form the fan chamber. The upper shell 123 of the diffuser chamber and the lower shell 131 of the diffuser chamber are vertically corresponding and form a diffuser chamber 114 therebetween. The upper shell 124 of the heat exchange chamber and the lower shell 135 of the heat exchange chamber are vertically corresponding and form a heat exchange chamber 115 therebetween. The air outlet 112 is defined between the upper shell 124 of the heat exchange chamber and the lower shell 135 of the heat exchange chamber.

[0050] In various installation forms of the indoor unit 10, a mounting cavity 116 is recessed at the bottom of the housing 100, that is, the space between the lower portion of the diffuser cavity lower shell 131 and the fan cavity rear shell 121 forms the mounting cavity 116. The mounting cavity 116 is located on the side of the air inlet 111 and opens downward, and the electric control box assembly 400 is installed in the mounting cavity 116 from bottom to top, so that the electric control box assembly 400 can be arranged outside the housing 100, and the external airflow passes through the electric control box assembly 400 to enter the air inlet 111, thereby enhancing the heat dissipation efficiency of the electric control box assembly 400.

[0051] Figure 2a As shown in the example, the indoor unit 10 is used in conjunction with the air inlet duct, that is, the indoor unit 10 also includes an air inlet duct interface 140 that opens downward. The air inlet duct interface 140 is arranged around the first part 1111 of the air inlet 111 and the opening of the installation cavity 116, and the air inlet duct interface 140 connects the fan cavity rear shell 121 and the side of the water receiving tray 132 facing the electric control box assembly 400, so that the air inlet duct interface 140 can be located between the side of the water receiving tray 132 close to the diffuser cavity lower shell 131 and the side of the first shell 120 away from the water receiving tray 132.

[0052] The air inlet duct interface 140 is arranged around the air inlet 111 and below the electric control box assembly 400. When the wind wheel 200 is working, the external airflow enters the installation cavity 116 from the air inlet duct through the air inlet duct interface 140. The air inlet 111 and the electric control box assembly 400 are arranged in the space. Part of the external airflow enters the air inlet 111 after passing through the air duct interface 100, and part of the external airflow enters the air inlet 111 after passing through the air inlet duct interface 140, and then passes through the surface of the electric control box assembly 400 to enter the air inlet 111, which can increase the air inlet area of ​​the air inlet duct. In addition, since the protective grille 300 is connected to the housing 100 and covers one side of the wind wheel 200 by covering the first part 1111 and the second part 1112, the protective grille 300 can cover the part where the air inlet duct interface 140 is connected to the air inlet 111, so as to prevent foreign matter from being rolled into the air duct 110 from the air inlet duct interface 140 when the wind wheel 200 is working.

[0053] In another installation form, such as Figure 2b As shown, the indoor unit 10 is installed on the ceiling, and the ceiling is provided with a vent 150, the first part 1111 of the air inlet 111 is vertically opposite to the vent 150, and the installation cavity 116 and the electric control box assembly 400 therein are vertically opposite to the vent 150. The vent 150 can be used as an inspection port and a return air port of the indoor unit 10, and the electric control box assembly 400 is exposed downward, which is convenient for heat dissipation and maintenance, and also convenient for the staff to disassemble, replace and repair the indoor unit 10 from the vent 150.

[0054] The wind wheel 200 is arranged in the fan chamber 113, that is, the wind wheel 200 is arranged in the air duct 110, and the wind wheel 200 has blades 210 arranged circumferentially to increase the speed of the gas flowing into the indoor unit 10 from the air inlet 111. The types include cross-flow wind wheels, axial flow wind wheels, etc. Among them, the cross-flow wind wheel has the advantages of small radial size, low speed, low noise, uniform air output, etc., and its axial length can be extended arbitrarily without affecting the gas flow state. In one embodiment of the present application, if Figure 1 As shown in FIG. 2 , the wind wheel 200 may be a crossflow wind wheel, and may also be other types of wind wheels 200 .

[0055] The protective grille 300 is connected to the housing 100 and covers one side of the wind wheel 200 by covering the first part 1111 and the second part 1112 to prevent foreign matter from being drawn into the wind wheel 200 from the air inlet 111. Figure 3 As shown, the protective grille 300 includes a grille frame 310 and a plurality of grille bars 311. The grille frame 310 may be a frame structure. The middle of the grille frame 310 is a hollow area. The plurality of grille bars 311 are arranged in the grille frame 310, and the two ends of the plurality of grille bars 311 along the length direction are respectively connected to the inner wall surface of the grille frame 310. The plurality of grille bars 311 are used to define a plurality of grille holes 312 in the hollow area of ​​the grille frame 310. The plurality of grille holes 312 are evenly arranged at intervals, and may be in a honeycomb, diamond, or other shapes. Alternatively, the plurality of grille bars 311 may be arranged parallel to each other in a railing shape. Optionally, when the protective grille 300 is a periodic topological structure such as a honeycomb structure, the fracture toughness and impact resistance of the protective grille 300 can be effectively improved, and the vibration reduction and noise reduction effects can also be achieved. At the same time, it is also conducive to achieving uniform air supply at the air inlet 111, ensuring the stability and smoothness of air circulation, so that it is not easy to form eddy currents or turbulence, thereby improving the air intake effect of the indoor unit 10. Of course, the grille hole 312 can be set to a smaller aperture, so that while ensuring smooth air intake, it can also protect the safety of maintenance personnel when they maintain the components set inside the indoor unit 10.

[0056] In some embodiments, the grille bars 311 and the grille frame 310 may be an integrated structure, which facilitates the processing and forming of the protective grille 300, has a high processing efficiency, and can also ensure that the grille bars 311 and the grille frame 310 are firmly and securely connected. Here, the specific data of the grille bars 311 can be adaptively set and adjusted according to the size of the grille frame 310 and the size of the air inlet 111 of the indoor unit 10, and this application does not limit this. The material of the protective grille 300 can be a metal material (such as an iron material), an alloy material (such as an aluminum alloy material) or a plastic material (such as a polyvinyl chloride material).

[0057] The indoor unit 10 further includes an electric control box assembly 400. As shown in FIG. 2, the electric control box assembly 400 is disposed outside the housing 100 and adjacent to the air intake 111. Specifically, the electric control box assembly 400 can also be installed at the bottom of the housing 100 and is spaced apart from the first part 1111 in the front-back direction of the housing 100. In this way, while the impeller 200 is working, the heat dissipation of the electric control box assembly 400 can be taken into account, preventing the electric control box assembly 400 from being in a high-temperature environment for a long time and thus prone to phenomena such as burning out the machine, ensuring the reliability of the operation of the electric control box assembly 400. At the same time, the space below the diffuser chamber lower housing 131 can be fully utilized, so that the indoor unit 10 does not need to additionally increase other spaces to install the electric control box assembly 400, which can prevent the overall volume of the indoor unit 10 from being too large and make the structure more compact.

[0058] In the present application, the protective grille 300 separates the impeller 200 and the electric control box assembly 400, and there is a gap between the protective grille 300 and the electric control box assembly 400. Optionally, the gap is greater than or equal to 1 cm. This can leave a certain space for the installation of the protective grille 300 and the electric control box assembly 400, facilitating operations such as separately disassembling and assembling the protective grille 300 and the electric control box assembly 400 by the staff. At the same time, when disassembling and assembling, it is not necessary to first remove the protective grille 300 to access the electric control box assembly 400. Instead, through the inspection opening opened in the indoor ceiling and corresponding to the installation position of the electric control box assembly 400, the position of the electric control box assembly 400 can be directly observed, and the electric control box assembly 400 can be directly maintained, disassembled and assembled accordingly. This makes the work of maintenance personnel more convenient and reduces labor costs. Of course, this distance is not suitable to be set too large, which will cause the overall volume of the whole machine to be too large. Therefore, this distance can take, for example, 6 cm as the upper limit value.

[0059] In some embodiments, please refer to again Figure 3 , one side of the protective grille 300 is connected to the first housing 120, and the other side is connected to the first housing 120. Specifically, the protective grille 300 includes at least two grille parts 320 sequentially connected between the first housing 120 and the second housing 130, and adjacent two grille parts 320 are arranged at an angle.

[0060] In Figure 3Exemplarily shown, the included angle is preferably 90°, that is, the cross-section of the protection grille 300 in the lateral direction is L-shaped. At this time, stress concentration occurs at the included angle of the protection grille 300, which is beneficial to improving the strength of the protection grille 300 to resist wind pressure. Of course, the angle of the included angle can also be adjusted within an appropriate range. The two adjacent grille parts 320 can be integrally formed, which is convenient for production and manufacturing. Specifically, the grille part 320 includes a first grille part 321 connected to the second housing 130 and a second grille part 322 connected to the first housing 120. The first grille part 321 is arranged between the wind wheel 200 and the electronic control box assembly 400, and the second grille part 322 is arranged between the wind wheel 200 and the air inlet 111. Among them, the first grille part 321 is parallel to the first part 1111 of the air inlet 111 facing the side; and / or, the second grille part 322 is parallel to the second part 1112 of the air inlet 111 facing downward. In this way, the air inlet area of the protection grille 300 can be increased, thereby effectively improving the air intake volume of the indoor unit 10. It can be understood that the connection manner between the grille part 320 and the housing 100 can be a fixed connection, such as welding or other forms; it can also be a detachable form, for example, it can be snap-connected through a snap-fastener form, or locked through a mortise and tenon structure, as well as bolt connection and other methods. The present application does not limit this.

[0061] In another embodiment, the protection grille 300 is arranged in an arc shape, and the distance between the protection grille 300 and the electronic control box assembly 400 gradually increases in the direction of the first part 1111 of the air inlet 111 facing the side, leaving space for the installation of the electronic control box assembly 400, and also increasing the operation space for maintenance personnel, while ensuring the smooth flow of the air flow. However, for the protection grille 300 with an arc-shaped structure, there is no included angle as the support angle for the structure of the protection grille 300 in the air flow direction, so its resistance strength to wind pressure is slightly smaller, but its structure is simple, which is convenient for production and installation and can reduce costs. In addition, as Figure 4 shown, the protection grille 300 can also be three grille parts 320 connected in sequence, that is, in a three-section form. In this way, the wind resistance area of the protection grille 300 in the air flow direction is increased, so as to share the wind pressure borne by the protection grille 300 in multiple directions. The present application does not limit the specific form of the protection grille 300.

[0062] In an embodiment of the present application, as Figure 2a and 5 shown, the indoor unit 10 further includes a heat exchanger 500. The air duct 110 includes a fan chamber 113, a diffuser chamber 114, and a heat exchange chamber 115 that are sequentially connected in the air flow direction. The wind wheel 200 is arranged in the fan chamber 113, and the heat exchanger 500 is arranged in the heat exchange chamber 115. The air flow in the air duct 110 is heat-exchanged by the heat exchanger 500 and then discharged from the air outlet 112 into the indoor environment to adjust the indoor temperature.

[0063] In some embodiments, the lower housing 135 of the heat exchange chamber is configured as a water receiving tray 132, and the water receiving tray 132 is located below the heat exchanger 500 to receive condensed water. In some embodiments, the cross-sectional area of the duct of the diffuser chamber 114 gradually increases in the direction from the air outlet side of the impeller 200 to the heat exchange chamber 115, and the outlet end of the diffuser chamber 114 terminates at the inlet end of the heat exchange chamber 115, that is, the cross-sectional area of the duct of the diffuser chamber 114 reaches the maximum at its connection with the heat exchange chamber 115. Among them, the first part 1111 is arranged towards the lower surface of the corresponding diffuser chamber 114 part of the second housing 130, and in the direction from the blower chamber 113 to the heat exchange chamber 115, the lower housing 131 of the diffuser chamber is inclined from top to bottom. Such a setting can change the flow state and speed of the air flow, so that the air flow can achieve better distribution and uniformity, facilitating the air flow flowing into the indoor unit 10 from the air inlet 111. After the air flow is accelerated and pressurized by the impeller 200 in the blower chamber 113 and then flows into the diffuser chamber 114, by using the inclination of the lower housing 131 of the diffuser chamber from top to bottom to form an inclined gas flow channel in the diffuser chamber 114 from top to bottom, due to inertia, the diffuser chamber 114 can fully slow down the gas and further pressurize it, making the air flow more stable and gentle when entering the heat exchanger 500, reducing noise, and thus further improving the working efficiency of the heat exchanger 500 located in the heat exchange chamber 115.

[0064] In some embodiments, the electronic control box assembly 400 is installed on the lower surface of the lower housing 131 of the diffuser chamber. When installing, the electronic control box assembly 400 can be fixed to the bottom of the lower housing 131 of the diffuser chamber by screws or bolts, or can also be fixed to the bottom of the lower housing 131 of the diffuser chamber by a snap-fitting method. Such a setting effectively utilizes the internal space of the indoor unit 10, making the overall volume of the product smaller. Moreover, when the electronic control box assembly 400 needs to be repaired, it can be directly repaired at the bottom of the indoor unit 10 without disassembling the entire indoor unit 10, which is more convenient and labor-saving. And, installing the electronic control box assembly 400 on the lower surface of the lower housing 131 of the diffuser chamber will not occupy the space of the blower chamber 113 and the heat exchange chamber 115, and at the same time can also take into account the wiring and pipe connection in the left-right direction of the indoor unit 10, making the pipeline compact and orderly, and effectively improving the space utilization rate. It can be understood that the electronic control box assembly 400 can also be arranged at other positions, such as being arranged outside the housing 100 of the indoor unit 10, which is more convenient for disassembly and maintenance, or can also be arranged between the impeller 200 and the protective grille 300, etc. The present application does not limit this.

[0065] In addition, the diffuser chamber lower shell 131 and the water receiving tray 132 can be integrally formed. Compared with the air duct 110 forming solution of the related indoor unit 10, in the form of using multiple plate members to respectively splice out the diffuser chamber 114 and the heat exchange chamber 115 and then docking the diffuser chamber 114 and the heat exchange chamber 115, to a certain extent, the number of components of the second housing 130 is reduced, the production efficiency and installation efficiency of the second housing 130 can be improved, and the cost can be reduced. And when the diffuser chamber lower shell 131 and the water receiving tray 132 are set as an integrally formed member, the diffuser chamber lower shell 131 and the water receiving tray 132 are smoothly transitioned at the connection between the diffuser chamber 114 and the heat exchange chamber 115. This smoothly transitioned structure at the connection between the above two can ensure the uniformity of the flow field in the air duct 110, avoid the generation of turbulence in the air duct 110, and further reduce noise. In some embodiments, the second housing 130 can be injection molded or hot press molded. For example, the second housing 130 is integrally formed by plastic injection molding. The manufacturing process is simple, suitable for commercial production, can effectively reduce costs, and the plastic material is lighter in weight, which can reduce the product weight and facilitate transportation and installation.

[0066] It should be noted that in the prior art, the chamber structure forming the diffuser chamber 114 and the water receiving tray 115 are usually separately arranged and then spliced to form the air duct 110. The number of plate members in this structural form is relatively large and the connection method is complex, resulting in more connections between the diffuser structure and the water receiving tray 132 and easy to generate gaps. Therefore, the requirement for airtightness is relatively high during the installation operation. In this application, the diffuser chamber lower shell 131 forming the bottom wall of the diffuser chamber 114 and the water receiving tray 132 forming the bottom wall of the heat exchange chamber 115 are designed to be integrally formed. In this way, in the air duct 110 structure between the diffuser chamber 114 and the heat exchange chamber 115, the situation of splicing multiple plate members is greatly reduced, thereby reducing the situation of gaps appearing at the connections. In this way, it is beneficial for the water receiving tray 132 to collect and drain water, and avoid the safety hazard caused by the connection gap between the water receiving tray 132 and the diffuser chamber lower shell 131, resulting in condensate leaking to other structures of the indoor unit 10. The installation operation is also simpler. Therefore, the bottom wall of the diffuser chamber 114 and the bottom wall of the heat exchange chamber 115 have higher integrity, the leakage amount during the airflow movement process is greatly reduced, the static pressure loss is also reduced, and the smoothness of the airflow is improved, thereby further increasing the air supply volume and heat exchange efficiency and reducing the generation of noise. This optimized airtightness can not only improve the working efficiency of the system, but also help prevent irrelevant gases or foreign objects from entering the air duct and protect the safe and stable operation of the heat exchange chamber 115. Generally speaking, based on the design concept of integral formation, the embodiments of this application optimize the connection structure between the diffuser chamber 114 and the heat exchange chamber 115, which not only simplifies the manufacturing and assembly processes, but also improves the stability, durability and overall working efficiency of the system.

[0067] Such as Figure 6As shown, the indoor unit 10 further includes a volute tongue 133. The volute tongue 133 is connected to the diffuser chamber lower housing 131. The connection method can be a fixed connection or a detachable connection. The detachable methods include but are not limited to screwing, clamping, etc. The volute tongue 133 is disposed in the air duct 110 and is disposed opposite to the blades 210 of the impeller 200, and can guide the airflow blown out of the air duct 110, thereby adjusting the air supply direction of the indoor unit 10.

[0068] In one embodiment, as Figure 7 shown, the indoor unit 10 further includes at least two side covers 220 and two side enclosures 600. The two side covers 220 cover the left and right sides in the length direction of the blower chamber 113 cavity to protect the impeller 200 disposed in the blower chamber 113. The two side enclosures 600 cover the two sides in the length direction of the indoor unit 10 to protect the internal structure of the indoor unit 10 in the side direction. A drain pipe opening may be provided on the side enclosure 600 for the pipes in the indoor unit 10 to extend outside the indoor unit 10 and communicate with the outdoor unit 20. Of course, the drain pipe opening may also be provided at other positions, such as the first housing 120 or the second housing 130.

[0069] The present invention also provides a heating, ventilation and air conditioning (HVAC) device 1, as Figure 8 shown. The HVAC device 1 includes an outdoor unit 20 and an indoor unit 10. The outdoor unit 20 is connected to the indoor unit 10 through a pipe. For the specific structure, refer to the above embodiments. Since the HVAC device 1 adopts all the technical solutions of the above embodiments, it has at least all the beneficial effects brought by the technical solutions of the above embodiments, which will not be elaborated herein one by one.

[0070] The above are only the preferred embodiments of the present invention, and do not limit the patent scope of the present invention. Any equivalent structural transformation made under the concept of the present invention by using the content of the specification and drawings of the present invention, or any direct / indirect application in other related technical fields is included in the patent protection scope of the present invention.

Claims

1. An indoor unit, characterized in that, Comprising: A housing, which has an air duct formed therein and has an air suction port communicating with the air duct. The air suction port has a first part facing the side and a second part facing downward. An impeller, which is arranged in the air duct. And A protective grille, which is connected to the housing and covers one side of the impeller in a manner of covering the first part and the second part.

2. The indoor unit according to claim 1, characterized in that, It further includes an electric control box assembly, which is arranged outside the housing and adjacent to the air suction port. The protective grille separates the impeller and the electric control box assembly.

3. The indoor unit according to claim 2, characterized in that, The electric control box assembly is arranged at the bottom of the housing and is relatively spaced from the first part in the front-back direction of the housing.

4. The indoor unit according to claim 2, characterized in that, There is a gap between the protective grille and the electric control box assembly.

5. The indoor unit according to claim 4, characterized in that, The gap between the protective grille and the electric control box assembly is greater than 1 centimeter.

6. The indoor unit according to claim 1, characterized in that, The housing includes a first housing and a second housing connected to each other. The first housing and the second housing cooperate to define the air duct and the air suction port. The protective grille includes at least two grille parts sequentially connected between the first housing and the second housing, and adjacent two grille parts are arranged at an angle.

7. The indoor unit according to claim 6, characterized in that, The grille part includes a first grille part connected to the second housing and a second grille part connected to the first housing. The first grille part is arranged between the impeller and the electric control box assembly, and the second grille part is arranged between the impeller and the air suction port. Wherein, the first grille part is parallel to the first part of the air suction port facing the side. And / or, the second grille part is parallel to the second part of the air suction port facing downward.

8. The indoor unit according to claim 1, characterized in that, The housing includes a first housing and a second housing connected to each other. The first housing and the second housing cooperate to define the air duct and the air suction port. One side of the protective grille is connected to the first housing, and the other side is connected to the first housing.

9. The indoor unit according to claim 8, characterized in that, The protective grille is arranged in an arc shape, and the distance between the protective grille and the electric control box assembly gradually increases in the direction of the first part facing the side of the air suction port.

10. The indoor unit according to claim 8, characterized in that, The first housing and the second housing also cooperate to define an air discharge port communicating with the air duct, and the air discharge port faces horizontally.

11. The indoor unit according to claim 8, characterized in that, It further includes a heat exchanger. The air duct includes a blower chamber, a diffuser chamber and a heat exchange chamber sequentially communicating in the air flow direction. The impeller is arranged in the blower chamber, and the heat exchanger is arranged in the heat exchange chamber. The second housing includes a diffuser chamber lower shell forming the bottom wall of the diffuser chamber and a water receiving tray forming the bottom wall of the heat exchange chamber. Wherein, the first part faces the lower surface of the corresponding part of the second housing for the diffuser chamber, and in the direction from the blower chamber to the heat exchange chamber, the diffuser chamber lower shell is inclined from top to bottom, and the electric control box assembly is installed on the lower surface of the diffuser chamber lower shell.

12. The indoor unit according to claim 1, characterized in that, It further includes an electric control box assembly. An installation cavity is recessed at the bottom of the housing. The installation cavity is located on the side of the air suction port and opens downward, and the electric control box assembly is installed in the installation cavity from bottom to top.

13. The indoor unit according to claim 12, characterized in that, It further includes an air inlet pipe interface opening downward, and the air inlet pipe interface is arranged on the periphery of the first part of the air suction port and the opening of the installation cavity.

14. The indoor unit according to claim 12, characterized in that, The indoor unit is installed on the ceiling, the ceiling is provided with a ventilation opening, the first part of the air suction opening is vertically opposite to the ventilation opening, and the installation cavity and the electronic control box assembly therein are vertically opposite to the ventilation opening.

15. The indoor unit according to claim 14, characterized in that, The ventilation opening is an access opening for the indoor unit.

16. A heating, ventilation and air conditioning equipment, characterized in that, It includes an outdoor unit and the indoor unit according to any one of claims 1 to 15, and the outdoor unit is connected to the indoor unit through pipes.

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