Indoor unit and heating and ventilation equipment

Abstract

The invention provides an indoor unit and heating and ventilation equipment. The indoor unit comprises a shell and an electric control box. An air duct is formed in the shell and comprises a wind wheel cavity, a diffusion cavity and a heat exchange cavity which are sequentially communicated, a wind wheel is arranged in the wind wheel cavity, and a heat exchanger is arranged in the heat exchange cavity; the electric control box is installed on the bottom face or the side face of the shell so that the electric control box can be exposed out of the bottom or the side portion of the indoor unit. The electric control box in the indoor unit is convenient to overhaul.

Description

Technical Field

[0001] The present application relates to the technical field of air conditioners, and particularly relates to an indoor unit and a heating, ventilation and air conditioning (HVAC) device using the indoor unit. Background Art

[0002] In the related art, an indoor unit includes a housing, a wind wheel and an electric control box. The wind wheel and the electric control box are arranged inside the housing. An air return opening is formed at the bottom or side of the housing. An external air return opening corresponding to the air return opening is arranged on the ceiling. Both sides of the housing of the indoor unit along the axial direction of the wind wheel have side plates. The electric control box is installed on the side plates. Moreover, an external maintenance opening corresponding to the position of the electric control box needs to be arranged on one side of the external air return opening on the ceiling. In this way, multiple openings need to be formed on the ceiling, a grille needs to be covered at the corresponding external air return opening, and a cover plate needs to be correspondingly covered at the external maintenance opening. Moreover, when maintenance of the indoor unit is required, the cover plate on the external maintenance opening and the grille on the external air return opening need to be disassembled and assembled respectively.

[0003] Therefore, the above-mentioned indoor unit not only has complex construction procedures, but also is inconvenient during the maintenance of the indoor unit. Summary of the Invention

[0004] Embodiments of the present application provide an indoor unit and an HVAC device, which are used to solve the problems of complex construction procedures and inconvenient maintenance of the indoor unit in the related art.

[0005] On the one hand, the present application provides an indoor unit, including a housing, a wind wheel, a heat exchanger and an electric control box; a air duct is formed inside the housing. The air duct includes a wind wheel chamber, a diffuser chamber and a heat exchange chamber that are sequentially communicated. The wind wheel is arranged in the wind wheel chamber, and the heat exchanger is arranged in the heat exchange chamber; the electric control box is installed on the bottom surface or side surface of the housing, so that the electric control box is exposed at the bottom or side of the indoor unit.

[0006] As an optional implementation manner, the electric control box is installed in the middle of the bottom surface of the housing.

[0007] As an optional implementation manner, the electric control box is located between the wind wheel chamber and the heat exchange chamber.

[0008] As an optional implementation manner, the air duct has an air return opening communicated with the wind wheel chamber, and the air return opening is formed on the bottom surface or side surface of the housing; an installation cavity is formed on the bottom surface of the housing between the wind wheel chamber and the heat exchange chamber, and the electric control box is installed in the installation cavity.

[0009] As an optional implementation manner, the air return opening is formed on the side of the bottom surface of the housing; the installation cavity is formed on the bottom surface of the housing, and the installation cavity is adjacent to the wind wheel chamber.

[0010] As an optional implementation manner, when the indoor unit is in the installed state, it has a length direction, a width direction and a height direction; the dimension of the installation cavity in the width direction of the indoor unit gradually decreases in the direction away from the air return opening.

[0011] As an alternative embodiment, the housing includes a water receiving tray and a diffuser chamber lower housing; the water receiving tray defines the bottom wall of the heat exchange chamber, the water receiving tray includes a tray bottom wall and a tray side wall, and the tray side wall is connected between the diffuser chamber lower housing and the tray bottom wall; the tray side wall defines a part of the side wall of the installation chamber, and opposite sides of the diffuser chamber lower housing form the bottom wall of the diffuser chamber and the bottom wall of the installation chamber; wherein, an angle greater than or equal to 90 degrees is formed between the bottom wall of the installation chamber and the side wall of the installation chamber defined by the tray side wall.

[0012] As an alternative embodiment, the side wall of the installation chamber defined by the tray side wall extends in the height direction of the indoor unit, and there is an angle between this side wall of the installation chamber and the vertical direction; the bottom wall of the installation chamber extends in the width direction of the indoor unit, and there is an angle between the bottom wall of the installation chamber and the horizontal direction.

[0013] As an alternative embodiment, the angle between the side wall of the installation chamber and the vertical direction is smaller than the angle between the bottom wall of the installation chamber and the horizontal direction.

[0014] As an alternative embodiment, the indoor unit provided in this application further includes a drain pipe and a refrigerant pipe connected to the heat exchanger, the housing includes a water receiving tray, the water receiving tray defines the bottom wall of the heat exchange chamber, and the drain pipe is connected to the water receiving tray; the space between the electronic control box and the opening of the installation chamber is available for the drain pipe and the refrigerant pipe to pass through.

[0015] As an alternative embodiment, the housing further includes two oppositely arranged side plates; each side plate has an outlet notch communicating with the installation chamber, and the refrigerant pipe and the drain pipe can extend out of the installation chamber through the outlet notch on any one of the side plates.

[0016] As an alternative embodiment, the wall of the outlet notch is in smooth transition.

[0017] As an alternative embodiment, a support structure is provided below the outlet notch, and the support structure is connected to the side plate; wherein, the support structure is configured to support the drain pipe and / or the refrigerant pipe.

[0018] As an alternative embodiment, a drainage groove is provided on the water receiving tray, a drainage port communicating with the drain pipe is formed on one side of the drainage groove close to the drain pipe; the depth of the drainage groove gradually increases in the direction close to the drainage port.

[0019] As an alternative embodiment, the bottom wall of the drainage groove is an inclined wall.

[0020] As an alternative implementation, the housing includes a housing body and a protective grille detachably connected to the housing body, and an installation cavity is formed on the bottom surface of the housing body; a part of the structure of the protective grille is located on one side of the wind wheel close to the air return opening, and another part of the structure of the protective grille is located between the wind wheel and the electronic control box, and the protective grille is detachably connected to the housing body; a wind wheel cavity is formed by enclosing between the protective grille and the housing body.

[0021] As an alternative implementation, the projections of the protective grille and the electronic control box on the plane where the opening of the installation cavity is located do not overlap each other.

[0022] As an alternative implementation, the housing body includes a first housing and a second housing connected to each other, and the first housing and the second housing cooperate to define an air duct; the protective grille is detachably connected between the first housing and the second housing.

[0023] As an alternative implementation, the protective grille includes a plurality of grille parts connected in sequence, and an included angle is provided between every two of the plurality of grille parts.

[0024] As an alternative implementation, the grille part includes a first grille part and a second grille part; the first grille part is detachably connected to the second housing, and the first grille part is located between the lower part of the wind wheel and the electronic control box; the second grille part is detachably connected to the first housing, and the second grille part is located on one side of the wind wheel close to the air return opening; wherein, the first grille part is perpendicular to the plane where the opening of the installation cavity is located; and / or, the second grille part is parallel to the plane where the opening of the installation cavity is located.

[0025] As an alternative implementation, the grille part includes a first grille part, a second grille part and a third grille part connected in sequence; the first grille part is detachably connected to the second housing, and the first grille part is located between the lower part of the wind wheel and the electronic control box; the third grille part is detachably connected to the first housing, and the third grille part is located on one side of the wind wheel close to the air return opening; the included angles between the first grille part and the second grille part and between the third grille part and the second grille part are both obtuse angles; wherein, the first grille part is perpendicular to the plane where the opening of the installation cavity is located; and / or, the third grille part is parallel to the plane where the opening of the installation cavity is located.

[0026] As an alternative implementation, the protective grille is arc-shaped, and the distance between the protective grille and the electronic control box gradually increases in the direction towards the opening of the installation cavity.

[0027] As an alternative implementation, an air outlet communicating with the heat exchange cavity is formed at one end of the air duct; the size of the heat exchange cavity in the height direction gradually decreases in the direction close to the air outlet.

[0028] As an alternative implementation, the inner wall of the heat exchange cavity smoothly transitions in the direction close to the air outlet.

[0029] As an alternative embodiment, the indoor unit provided in this embodiment further includes an electric auxiliary heating module. The electric heating tube of the electric auxiliary heating module is electrically connected to the electric control box; the electric auxiliary heating module is located on one side of the diffuser cavity close to the heat exchange cavity.

[0030] As an alternative embodiment, the indoor unit provided in this embodiment further includes a motor and a water pump. The output shaft of the motor is connected to the air wheel, and the water pump is connected to the housing; the motor and the water pump are located on the same side of the electric control box along the length direction of the electric control box.

[0031] As an alternative embodiment, the electric control box and the housing are detachably connected through a clamping structure and / or a screwing structure.

[0032] As an alternative embodiment, one side of the electric control box and the housing along the length direction of the electric control box is detachably connected through a clamping structure, and the other side of the electric control box and the housing along the length direction of the electric control box is detachably connected through a screwing structure; or, one side of the electric control box and the housing along the width direction of the electric control box is detachably connected through a clamping structure, and the other side of the electric control box and the housing along the width direction of the electric control box is detachably connected through a screwing structure.

[0033] As an alternative embodiment, the electric control box includes a box body, a box cover and an electric control board assembly; the box body is detachably connected to the housing, the box cover is detachably connected to the box body, and the box cover and the box body define a receiving cavity for receiving the electric control board assembly.

[0034] On the other hand, the present application provides a heating, ventilation and air conditioning (HVAC) device, including the above-mentioned indoor unit.

[0035] In the indoor unit and the HVAC device provided in the embodiments of the present application, by installing the electric control box on the bottom surface or side surface of the housing and making the electric control box exposed at the bottom or side of the indoor unit, therefore, when maintenance of the indoor unit is required, only the grille on the external return air outlet needs to be removed, and then disassembly and maintenance operations can be carried out on the air wheel, electric control box, etc. of the indoor unit. In this way, compared with the related art, in which when maintenance of the indoor unit is required, the grille at the external return air outlet and the cover plate at the corresponding electric control box need to be disassembled and assembled separately, the maintenance operation of the indoor unit provided in the embodiments of the present application is more convenient. Moreover, the electric control box can be exposed outside the indoor unit, that is, both the electric control box and the air wheel part of the indoor unit can be observed through the external return air outlet. Therefore, during the installation process of the indoor unit of the present application, there is no need to open two openings on the ceiling and install the grille and the cover plate separately as in the related art, which can reduce the construction procedures of the indoor unit and improve the installation efficiency of the indoor unit. BRIEF DESCRIPTION OF THE DRAWINGS

[0036] To more clearly illustrate the technical solutions in the embodiments of the present application or the prior art, the following will briefly introduce the drawings required for the description of the embodiments or the prior art. Obviously, the drawings in the following description are only some embodiments of the present application. For those of ordinary skill in the art, without creative efforts, other drawings can also be obtained based on these drawings.

[0037] Figure 1 Schematic diagram of the three-dimensional structure of the indoor unit provided by the embodiment of the present application;

[0038] Figure 2 is Figure 1 Schematic diagram of the three-dimensional structure from another perspective;

[0039] Figure 3 Exploded view of the indoor unit provided by the embodiment of the present application;

[0040] Figure 4 Schematic diagram of the structure of the first partial structure of the indoor unit provided by the embodiment of the present application;

[0041] Figure 5 Schematic diagram of the structure of the electric control box in the indoor unit provided by the embodiment of the present application;

[0042] Figure 6 Exploded view of the electric control box in the indoor unit provided by the embodiment of the present application;

[0043] Figure 7 is Figure 5 Enlarged schematic diagram of the local structure at A in;

[0044] Figure 8 is Figure 5 Enlarged schematic diagram of the local structure at B in;

[0045] Figure 9 is Figure 6 Enlarged schematic diagram of the local structure at C in;

[0046] Figure 10 is Figure 6 Enlarged schematic diagram of the local structure at D in;

[0047] Figure 11 is Figure 6 Enlarged schematic diagram of the local structure at E in;

[0048] Figure 12 is Figure 6 Enlarged schematic diagram of the local structure at F in;

[0049] Figure 13 Schematic diagram of the structure of the second partial structure of the indoor unit provided by the embodiment of the present application;

[0050] Figure 14 is Figure 13 a sectional view taken along line G-G in;

[0051] Figure 15 is Figure 14 an enlarged schematic view of the partial structure at H in;

[0052] Figure 16 a three-dimensional structure schematic diagram of the diffuser chamber lower housing in the indoor unit provided by the embodiment of the present application;

[0053] Figure 17 is Figure 16 an enlarged schematic view of the partial structure at I in;

[0054] Figure 18 a structure schematic diagram of the third partial structure of the indoor unit provided by the embodiment of the present application;

[0055] Figure 19 is Figure 18 a sectional view taken along line J-J;

[0056] Figure 20 is Figure 19 an enlarged schematic view of the partial structure at K in;

[0057] Figure 21 is Figure 19 an enlarged schematic view of the partial structure at L in;

[0058] Figure 22 a three-dimensional structure schematic diagram of the indoor unit provided by the embodiment of the present application from another perspective;

[0059] Figure 23 is Figure 22 an enlarged schematic view of the partial structure at M in;

[0060] Figure 24 a three-dimensional structure schematic diagram of the indoor unit provided by the embodiment of the present application from yet another perspective;

[0061] Figure 25 is Figure 24 an enlarged schematic view of the partial structure at N in;

[0062] Figure 26 a three-dimensional structure schematic diagram of the water receiving tray in the indoor unit provided by the embodiment of the present application;

[0063] Figure 27 a structure schematic diagram of the fourth partial structure of the indoor unit provided by the embodiment of the present application;

[0064] Figure 28 is Figure 27 a structure schematic diagram in another embodiment;

[0065] Figure 29 Schematic diagram of the fifth partial structure of the indoor unit provided by the embodiment of the present application.

[0066] Explanation of reference numerals:

[0067] 1. Housing; 2. Impeller; 3. Heat exchanger; 4. Electric control box; 5. Drain pipe; 6. Refrigerant pipe; 7. Thermal insulation sleeve; 8. Motor; 9. Water pump;

[0068] 10. Indoor unit; 11. Housing body; 12. Protective grille; 41. Electric control board assembly; 42. Box cover; 43. Box body; 44. Accommodation cavity; 45. Connecting wire; 61. Gas pipe; 62. Liquid pipe; 20. Electric auxiliary heating module;

[0069] 111. First housing; 112. Second housing; 113. Air duct; 121. Grille part; 421. Jack; 422. First threaded hole; 431. Box body main body; 432. Insertion part; 433. Flange;

[0070] 1111. Upper shell of impeller cavity; 1112. Upper shell of diffuser cavity; 1113. Upper shell of heat exchange cavity; 1114. Side plate; 1115. Installation cavity; 1116. Pipe outlet notch; 1117. Support member; 1118. Cavity opening; 1121. Water receiving tray; 1122. Lower shell of diffuser cavity; 1123. Bottom wall of tray; 1124. Side wall of tray; 1125. Fourth threaded hole; 1126. Reinforcing plate; 1127. First clamping projection; 1128. Sixth threaded hole; 1129. Reinforcing column; 1130. Second clamping projection; 1140. Drainage groove; 1141. Drainage port; 1131. Return air inlet; 1132. Impeller cavity; 1133. Diffuser cavity; 1134. Heat exchange cavity; 1135. Air outlet; 1211. First grille part; 1212. Second grille part; 1213. Third grille part; 4311. Third threaded hole; 4312. First clamping hole; 4313. Avoidance space; 4314. Fifth threaded hole; 4315. Second clamping hole; 4331. Second threaded hole. Detailed implementation manners

[0071] In the related art, an indoor unit includes a housing, a wind wheel, and an electric control box. The wind wheel and the electric control box are disposed inside the housing. An air return opening is formed at the bottom or side of the housing. An external air return opening corresponding to the air return opening is provided on the ceiling. The housing of the indoor unit has side plates on both sides along the axial direction of the wind wheel. The electric control box is installed on the side plates. Moreover, an external maintenance opening corresponding to the position of the electric control box needs to be provided on one side of the external air return opening on the ceiling. Thus, multiple openings need to be formed in the ceiling, a grille needs to be covered at the corresponding external air return opening, and a cover plate needs to be correspondingly covered at the external maintenance opening. Furthermore, when maintenance of the indoor unit is required, the cover plate on the external maintenance opening and the grille on the external air return opening need to be disassembled and assembled respectively. Therefore, the above indoor unit not only has complex construction procedures but also is rather inconvenient during the maintenance of the indoor unit.

[0072] Accordingly, an embodiment of the present application provides an indoor unit and a heating, ventilation, and air conditioning (HVAC) device, which facilitate the maintenance of the electric control box and enable the HVAC device provided by the embodiment of the present application to have better performance.

[0073] The embodiments of the present application will be described in detail below in conjunction with the accompanying drawings and specific implementation manners.

[0074] Please refer to Figures 1 to 4 , Figure 1 which is a schematic perspective view of the indoor unit provided by an embodiment of the present application, Figure 2 is Figure 1 a schematic perspective view from another perspective, Figure 3 is an exploded view of the indoor unit provided by an embodiment of the present application, Figure 4 is a schematic structural view of a first partial structure of the indoor unit provided by an embodiment of the present application. As Figures 1 to 4As shown in the figure, this embodiment provides an indoor unit 10, which includes a housing 1. The housing 1 includes a housing body 11. The housing body 11 includes a first housing 111 and a second housing 112 connected together. In this embodiment, the first housing 111 can be connected above the second housing 112, and a duct 113 is formed between the first housing 111 and the second housing 112. The duct 113 includes a return air inlet 1131, a blower chamber 1132, a diffuser chamber 1133, a heat exchange chamber 1134, and an air outlet 1135 that are sequentially connected. A blower 2 is arranged in the blower chamber 1132, and a heat exchanger 3 is arranged in the heat exchange chamber 1134. The indoor unit 10 provided in this embodiment can be installed on the ceiling in an indoor environment. Then, an external return air inlet will be provided on the ceiling corresponding to the return air inlet 1131, and an air discharge outlet will be provided corresponding to the air outlet 1135. During the operation of the indoor unit 10, the blower 2 rotates, which can suck the air flow in the indoor environment. The air flow sequentially enters the blower chamber 1132 through the external return air inlet and the return air inlet 1131, and after passing through the diffuser chamber 1133 and the heat exchange chamber 1134, it flows out from the air outlet 1135 and the air discharge outlet. The air flow exchanges heat with the heat exchanger 3 in the heat exchange chamber 1134, and finally discharges the air flow with the temperature change into the indoor environment through the air discharge outlet.

[0075] Among them, the return air inlet 1131 can be formed on the bottom surface of the housing 1 or on the side surface of the housing 1; the first housing 111 includes a blower chamber upper housing 1111, a diffuser chamber upper housing 1112, and a heat exchange chamber upper housing 1113 connected together. The bottom surface of the blower chamber upper housing 1111 defines the top wall of the blower chamber 1132, the bottom surface of the diffuser chamber upper housing 1112 defines the top wall of the diffuser chamber 1133, and the bottom surface of the heat exchange chamber upper housing 1113 defines the top wall of the heat exchange chamber 1134. In order to enclose the duct 113 in the length direction of the indoor unit 10, the first housing 111 may further include side plates 1114 located on both sides of the indoor unit 10 along the length direction.

[0076] It should be noted that the above up and down directions are the same as the up and down directions in Figures 1 to 4 ; the above length direction of the indoor unit 10 is the same as the x-x axis direction in Figures 1 to 3 ; in addition, in the following introduction, the case where the first housing 111 is located above the second housing 112 will be taken as an example for further introduction.

[0077] Generally, since the indoor unit 10 has different modes during operation, an electronic control module is required. In some embodiments, the indoor unit 10 provided in this embodiment further includes an electronic control box 4. In the related art, the electronic control box is installed on the side plate. When the electronic control box needs to be repaired, the grille at the air return opening on the ceiling and the cover plate corresponding to the electronic control box on the ceiling need to be removed to repair the electronic control box 4. Therefore, to overcome this defect, in this embodiment, the electronic control box 4 is installed on the bottom surface or side surface of the housing 1, so that the electronic control box 4 is exposed at the bottom or side of the indoor unit 10. In this way, when the grille on the external air return opening is opened, the electronic control box 4 will be exposed, and then operations such as repairing the electronic control box 4 can be performed.

[0078] Specifically, when the air return opening 1131 is formed on the side surface of the housing 1, the electronic control box 4 is installed on the side surface of the housing 1; when the air return opening 1131 is formed on the bottom surface of the housing 1, the electronic control box 4 is installed on the bottom surface of the housing 1. In this embodiment, the air return opening 1131 is formed on the bottom surface side of the housing 1. Therefore, the electronic control box 4 is also installed on the bottom surface of the housing 1. In the following description, it is assumed that the air return opening 1131 is formed on the bottom surface of the housing 1 and the electronic control box 4 is installed on the bottom surface of the housing 1 for narration.

[0079] When the electronic control box 4 is installed on the bottom surface of the housing 1, it means that the electronic control box is installed on the bottom surface of the second housing 112.

[0080] Furthermore, the impeller 2 of the present application can adopt a cross-flow impeller. It can be understood that when a cross-flow impeller is adopted, the indoor unit has the characteristics of large air volume, low noise and compact structure. Further, the housing 1 of the present application forms an impeller cavity 1132 to install the cross-flow impeller. Thus, compared with the form of a centrifugal fan with a centrifugal volute in the related art, the indoor unit of the present application does not need to additionally set a baffle structure for fixing the centrifugal volute in the air duct 113, and the structure is more simplified. In addition, due to the above layout form, the cross-sectional area of the cavity of the diffuser cavity 1133 can also be set to gradually increase in the direction from the impeller cavity 1132 to the heat exchange cavity 1134, and the outlet end of the diffuser cavity 1133 ends at the inlet end of the heat exchange cavity 1134, that is, the cross-sectional area of the diffuser cavity 1133 reaches the maximum at its connection with the heat exchange cavity 1134. During operation, under the drive of the impeller 2, the air flow discharged from the air outlet side of the impeller 2 flows through the diffuser cavity 1133 and the heat exchange cavity 1134 in sequence and then is discharged from the air outlet 1135. When the air flow passes through the connection of the diffuser cavity 1133 and the heat exchange cavity 1134, compared with the form of a centrifugal fan in the related art, air flow swirling is not likely to occur, the air flow is more smooth, and the air flow energy loss is less.

[0081] Such as Figure 4As shown, in some embodiments, in order to reduce the resistance of the air flow during the flow process and increase the flow velocity of the air flow discharged from the air outlet 1135, so that the air flow after heat exchange can accelerate the circulation of indoor air, the size of the heat exchange cavity 1134 in the height direction of the indoor unit 10 gradually decreases in the direction close to the air outlet 1135. In this way, during the operation of the indoor unit 10, when the air flow flows toward the side of the air outlet 1135 in the air duct 113, it can guide the flow direction of the air flow, so as to reduce the resistance of the air flow during the flow process, accelerate the flow velocity of the air flow, and improve the cooling or heating efficiency of the indoor unit 10.

[0082] Furthermore, the inner wall of the heat exchange cavity 1134 has a smooth transition in the direction close to the air outlet 1135. In this way, it is not only convenient for manufacturing the housing 1, but also can further reduce the resistance of the air flow during the flow process.

[0083] It should be noted that the height direction of the above-mentioned indoor unit 10 is consistent with the up and down direction in the figure.

[0084] Please refer to Figure 4 , in order to achieve the heating effect of the indoor unit 10, the indoor unit 10 provided in this embodiment should further include an electric auxiliary heating module 20. The electric heating tube of the electric auxiliary heating module 8 is electrically connected to the electric control box 4; the electric auxiliary heating module 20 is located on the side close to the heat exchange cavity 1134 in the diffuser cavity 1133. In this way, the space of the diffuser cavity 1133 can be used to arrange the electric auxiliary heating module 20, which can improve the structural compactness of the indoor unit 10 provided in this embodiment.

[0085] Please continue to refer to Figure 5 and Figure 6 , Figure 5 is a schematic structural diagram of the electric control box in the indoor unit provided in the embodiment of the present application, Figure 6 is an exploded view of the electric control box in the indoor unit provided in the embodiment of the present application. Since the function of the electric control box 4 is mainly realized by the internal electric control board assembly 41, when the electric control box 4 is overhauled, it is mainly to overhaul the internal electric control board assembly 41. At this time, some structures of the electric control box 4 need to be removed to expose the electric control board assembly 41 before the electric control board assembly 41 can be overhauled.

[0086] Accordingly, the above-mentioned electronic control box 4 may further include a detachable cover 42 and a box body 43. The cover 42 is connected to one side of the box body 43 facing the external return air outlet, and the box body 43 is detachably connected to the housing body 11. Specifically, the box body 43 is detachably connected to the second housing 112, and a receiving cavity 44 for receiving the electronic control board assembly 41 is defined between the cover 42 and the box body 43. The electronic control board assembly 41 is detachably connected to the bottom of the receiving cavity 44, that is, the electronic control board assembly 41 is detachably connected to the box body 43. In this way, when the electronic control box 4 is exposed through the external return air outlet, the cover 42 can be detached from the box body 43, then the electronic control board assembly 41 is exposed, and the electronic control board assembly 41 can be detached from the box body 43 for maintenance.

[0087] It should be noted that the above-mentioned electronic control board assembly 41 and the box body 43 can be detachably connected by threaded fasteners, such as screws. Here, the connection method between the electronic control board assembly 41 and the box body 43 is not limited.

[0088] Please refer to Figure 7 and Figure 8 , Figure 7 is Figure 5 the enlarged schematic view of the partial structure at A in Figure 8 is Figure 5 the enlarged schematic view of the partial structure at B in . In some embodiments, in order to facilitate the connection between the cover 42 and the box body 43 and improve the connection reliability between the cover 42 and the box body 43, the cover 42 and the box body 43 can adopt a combination of threaded connection and snap connection.

[0089] Specifically, please continue to refer to Figures 9 to 12 , Figure 9 is Figure 6 the enlarged schematic view of the partial structure at C in Figure 10 is Figure 6 the enlarged schematic view of the partial structure at D in Figure 11 is Figure 6 the enlarged schematic view of the partial structure at E in Figure 12 is Figure 6Schematic enlarged view of the local structure at position F in the figure. As shown in the figure, in some specific embodiments, a jack 421 is provided on one side of the box cover 42 along the length direction of the electric control box 4, and a first threaded hole 422 is provided on the other side of the box cover 42 along the length direction of the electric control box 4. The box body 43 includes a box body main body 431. A plug-in portion 432 is provided on one side of the box body main body 431 along the length direction of the electric control box 4. The plug-in portion 432 faces the center of the box body 43, and the plug-in portion 432 can be inserted into the jack 421 and abutted against the cover surface of the box cover 42 to connect one side of the box cover 42 along the length direction of the electric control box 4 to one side of the box body 43 along the length direction of the electric control box 4. A flanging 433 extending away from the center of the box body 43 is provided on the other side of the box body main body 431 along the length direction of the electric control box 4. A second threaded hole 4331 is provided on the flanging 433. Threaded fasteners such as screws can pass through the first threaded hole 422 and the second threaded hole 4331 in sequence to connect the other side of the box cover 42 along the length direction of the electric control box 4 to the other side of the box body 43 along the length direction of the electric control box 4.

[0090] Among them, the plug-in portion 432 can also be a flanging structure formed on the box body main body 431. Here, no specific restrictions are imposed on the structure of the plug-in portion 432.

[0091] In some other embodiments, the clamping structure between the box cover 42 and the box body 43 can also be in other forms. Here, no restrictions are imposed on other clamping structures.

[0092] It should be noted that the length direction of the above-mentioned electric control box 4 is consistent with the length direction of the indoor unit 10.

[0093] In order to facilitate the setting of other components or structural parts in the indoor unit 10, the electric control box 4 can be installed in the middle of the bottom surface of the housing 1. That is, it can be understood that the projection area of the electric control box 4 on the second housing 112 covers the central axis of the second housing 112 along the width direction of the indoor unit 10. In a specific embodiment, the central axis of the projection area of the electric control box 4 on the second housing 112 coincides with the central axis of the second housing 112. In this way, it is not only beneficial to the layout of the overall structure of the indoor unit 10, but also convenient to determine the installation position of the electric control box 4, improving the assembly efficiency of the indoor unit 10 provided in this embodiment, and such a setting makes the center of gravity of the whole machine more reasonable and more balanced.

[0094] When the electric control box 4 is installed at the middle position of the bottom surface of the second housing 112, the wind wheel cavity 1132 and the heat exchange cavity 1134 are respectively located on both sides of the electric control box 4 along the width direction of the indoor unit 10. In this way, under the condition of reasonable center of gravity layout, the space formed between the wind wheel cavity 1132 and the heat exchange cavity 1134 can be fully utilized, and the structural compactness of the indoor unit 10 provided in this embodiment can be improved.

[0095] It should be noted that the width direction of the indoor unit 10 described above is consistent with Figures 1 to 4 the y-y axis direction in

[0096] In order to install the electronic control box 4 on the bottom surface of the second housing 112, an installation cavity 1115 with an opening facing downward of the indoor unit, that is, opposite to the external return air outlet, can be formed on the bottom surface of the second housing 112 between the wind wheel cavity 1132 and the heat exchange cavity 1134. Both the wind wheel cavity 1132 and the external return air outlet are communicated with the installation cavity 1115; the electronic control box 4 is installed in the installation cavity 1115. In this way, by forming the installation cavity 1115 at the bottom of the second housing 112, it is possible to avoid increasing the size of the indoor unit 10 in the up and down direction, making the overall structure of the indoor unit 10 more compact.

[0097] It can be understood that when the installation cavity 1115 is formed on the bottom surface of the second housing 112, the electronic control box 4 can utilize the air flow flowing in through the external return air outlet to dissipate heat from the electronic control box 4. In order to achieve better heat dissipation performance of the electronic control box 4, the size of the installation cavity 1115 in the width direction of the indoor unit 10 gradually decreases in the direction away from the external return air outlet, that is, the opening on the air inlet side of the installation cavity 1115 is larger. In this way, more air flow can flow into the installation cavity 1115 to dissipate heat from the electronic control box 4, so that the electronic components in the electronic control box 4 can be effectively prevented from being in a working condition with too high temperature for a long time, thereby prolonging the service life of the electronic components and ensuring their reliability.

[0098] In order to make the opening on the air inlet side of the installation cavity 1115 larger, the shape of the second housing 112 can be adjusted adaptively. Thus, in some alternative embodiments, the second housing 112 includes a water receiving tray 1121 and a diffuser chamber lower housing 1122 connected together; the water receiving tray 1121 defines the bottom wall of the heat exchange cavity 1134, and the water receiving tray 1121 includes a tray bottom wall 1123 and a tray side wall 1124 connected together. The tray side wall 1124 is connected between the diffuser chamber lower housing 1122 and the tray bottom wall 1123; the tray side wall 1124 defines a part of the cavity side wall of the installation cavity 1115, and opposite sides of the diffuser chamber lower housing 1122 form the bottom wall of the diffuser chamber 1133 and the bottom wall of the installation cavity 1115; wherein, an angle greater than or equal to 90 degrees is formed between the bottom wall of the installation cavity 1115 and the cavity side wall of the installation cavity 1115 defined by the tray side wall 1124. In this way, the opening of the installation cavity 1115 is larger on the side facing the external return air outlet, so that the air inlet area on the air inlet side of the installation cavity 1115 is larger, enabling more air to flow towards the electronic control box 4 and effectively dissipating heat from the electronic control box 4.

[0099] Specifically, the cavity sidewall of the installation cavity 1115 defined by the disk sidewall 1124 extends in the height direction of the indoor unit 10, and there is an angle between the sidewall of the installation cavity 1115 and the vertical direction; the bottom wall of the installation cavity 1115 extends in the width direction of the indoor unit 10, and there is an angle between the bottom wall of the installation cavity 1115 and the horizontal direction, and the angle between the sidewall of the installation cavity 1115 and the vertical direction is smaller than the angle between the bottom wall of the installation cavity 1115 and the horizontal direction.

[0100] It should also be noted that, in combination with the above content, the impeller 2 of the present application adopts a cross-flow impeller, making the indoor unit 10 have the characteristics of large air volume and low noise. And the impeller 2 is directly installed in the impeller cavity 1132. The dimension of the impeller 2 in its axial direction (i.e., the X-X direction) matches the dimension of the impeller cavity 1132 in the X-X direction. Therefore, there is less surplus space in the impeller cavity 1132 in the X-X direction, making it difficult to install the electronic control box 4. In order to achieve effective heat dissipation of the electronic control box 4, if the size of the impeller cavity 1132 is increased to place the electronic control box 4, it will cause an increase in the overall size of the indoor unit 10. Therefore, in the present application, when the air duct 113 of the indoor unit 10 is set to a smooth structure of the impeller cavity 1132, the diffuser cavity 1133, and the heat exchange cavity 1134 to reduce wind energy loss, the space below the diffuser cavity lower shell 1122 is also cleverly utilized to form the installation cavity 1115, and the electronic control box 4 is accommodated and installed. In this way, on the basis of a compact structure of the whole machine, the advantages of convenient disassembly and assembly emphasized above are also realized.

[0101] Please continue to refer to Figures 13 to 15 , Figure 13 which is a schematic structural diagram of the second partial structure of the indoor unit provided by the embodiment of the present application, Figure 14 is Figure 13 a cross-sectional view taken at G-G in Figure 15 and is Figure 14 a partially enlarged schematic structural diagram at H in . When the box body 43 is detachably connected to the second housing 112, that is, the box body 43 is detachably connected to the diffuser cavity lower shell 1122. In some specific embodiments, for the connection method between the box body 43 and the diffuser cavity lower shell 1122, a combination of screw connection and snap connection can be adopted. The screw connection method can achieve the grounding of the electronic control box 4 when the screw fastener contacts the grounding wire in the electronic control box 4, and the screw fastener can reliably connect the box body 43 and the diffuser cavity lower shell 1122 together. The snap connection method can achieve the quick disassembly and assembly between the box body 43 and the diffuser cavity lower shell 1122.

[0102] Therefore, please continue to refer to Figure 16 and Figure 17 , Figure 16 which is a three-dimensional structural schematic diagram of the diffuser cavity lower shell in the indoor unit provided by the embodiment of the present application,Figure 17 is Figure 16 A schematic enlarged view of the local structure at position I in the figure. In some embodiments, in the width direction of the electronic control box 4, one side of the box body 43 is detachably connected to the diffuser cavity lower shell 1122 through a threaded fastener, and the other side of the box body 43 is snap-fitted to the diffuser cavity lower shell 1122.

[0103] It should be noted that the width direction of the above-mentioned electronic control box 4 is the same as the Figure 2 , Figure 3 , Figure 4 , Figure 6 , Figure 13 and Figure 14 y1-y1 axis direction in.

[0104] Specifically, at one side in the width direction of the electronic control box 4, a third threaded hole 4311 can be provided at the bottom of the box body main body 431, and a fourth threaded hole 1125 corresponding to the third threaded hole 4311 can be provided on the diffuser cavity lower shell 1122. The box body main body 431 can be connected to the diffuser cavity lower shell 1122 along one side in the width direction of the electronic control box 4 through a screw passing through the third threaded hole 4311 and the fourth threaded hole 1125.

[0105] In order to avoid affecting the structural strength of the diffuser cavity lower shell 1122 due to the setting of the fourth threaded hole 1125, a reinforcing plate 1126 can be provided on the side of the diffuser cavity lower shell 1122 facing the box body main body 431. In this way, the structural strength of the diffuser cavity lower shell 1122 can be improved.

[0106] Furthermore, on the other side in the width direction of the electronic control box 4, a first clamping convex 1127 can be provided on the diffuser cavity lower shell 1122, and a first clamping hole 4312 for the first clamping convex 1127 to pass through can be opened on the side wall of the box body main body 431. The first clamping convex 1127 passes through the first clamping hole 4312 and is snap-fitted with the first clamping hole 4312 to detachably connect the box body main body 431 to the diffuser cavity lower shell 1122 on the other side along the width direction of the electronic control box 4.

[0107] In this embodiment, no specific limitation is imposed on the shape of the first clamping convex 1127.

[0108] In order to improve the reliability of the connection between the box body 431 and the diffuser chamber lower shell 1122, two third threaded holes 4311 spaced apart along the length direction of the electric control box 4 can be provided on one side of the box body 431 along the width direction of the electric control box 4, and two first clamping holes 4312 spaced apart along the length direction of the electric control box 4 can be provided on the other side of the box body 431 along the width direction of the electric control box 4. At the same time, two fourth threaded holes 1125 corresponding to the third threaded holes 4311 and two first clamping protrusions 1127 corresponding to the first clamping holes 4312 are provided on the diffuser chamber lower shell 1122. In some other embodiments, the above-mentioned third threaded holes 4311, fourth threaded holes 1125, and first clamping protrusions 1127 and first clamping holes 4312 can also be other numbers, such as three, four, etc. Here, no limitation is made.

[0109] It should be noted that the length direction of the above-mentioned electric control box 4 is consistent with the length direction of the indoor unit 10, that is, the x-x axis direction in the figure.

[0110] Please continue to refer to Figures 18 to 21 , Figure 18 which is a schematic structural diagram of the third partial structure of the indoor unit provided by the embodiment of the present application, Figure 19 is Figure 18 a cross-sectional view along J-J, Figure 20 is Figure 19 a schematic enlarged view of the partial structure at K in Figure 21 is Figure 19 a schematic enlarged view of the partial structure at L in Figures 18 to 21 As shown in

[0111] Specifically, since the size of the bottom of the box body 431 in the length direction of the electric control box 4 is small, therefore, a relief space 4313 is formed on both sides of the bottom of the box body 431 respectively. On one side of the box body 431 along the length direction of the electric control box 4, a fifth threaded hole 4314 is provided on the top wall of the relief space 4313, and a sixth threaded hole 1128 can be provided on the diffuser chamber lower shell 1122. The threaded fastener, such as a screw, can pass through the fifth threaded hole 4314 and the sixth threaded hole 1128 in sequence to detachably connect one side of the box body 431 along the length direction of the electric control box 4 to the diffuser chamber lower shell 1122.

[0112] To avoid affecting the structural strength of the diffuser chamber lower housing 1122 due to the opening of the sixth threaded hole 1128, a reinforcing column 1129 can be provided on the diffuser chamber lower housing 1122. The reinforcing column 1129 extends into the corresponding avoidance space 4313, and the sixth threaded hole 1128 is opened on the reinforcing column 1129.

[0113] Further, on the other side of the box body 431 along the length direction of the electric control box 4, a second card hole 4315 can be opened on the side wall of the avoidance space 4313. Correspondingly, a second card protrusion 1130 can be provided on the diffuser chamber lower housing 1122. The second card protrusion 1130 can pass through the second card hole 4315 and be snap-connected with the second card hole 4315.

[0114] Here, no specific limitation is imposed on the shape of the second card protrusion 1130.

[0115] Please continue to refer to Figures 22 to 25 , Figure 22 which is a perspective schematic structural view of the indoor unit provided by the embodiment of the present application from another perspective, Figure 23 and is Figure 22 a partial enlarged schematic structural view of the M position in Figure 24 which is a perspective schematic structural view of the indoor unit provided by the embodiment of the present application from another perspective, Figure 25 and is Figure 24 a partial enlarged schematic structural view of the N position in Figures 22 to 25 As shown, in order to drain the water in the water receiving tray 1121, the indoor unit 10 provided by this embodiment may further include a drain pipe 5, and the drain pipe 5 is connected to the water receiving tray 1121. In this way, it can be avoided to a certain extent that the condensed water accumulates in the water receiving tray 1121, resulting in the occurrence of condensed water leakage of the indoor unit 10 and leakage into the room.

[0116] To improve the structural compactness of the indoor unit 10 provided by this embodiment, in some alternative embodiments, the space between the electric control box 4 and the cavity opening 1118 of the installation cavity 1115 can be penetrated by the drain pipe 5 and the refrigerant pipe 6. In this way, part of the structures of the electric control box 4, the drain pipe 5, and the refrigerant pipe 6 can be accommodated in the installation cavity 1115, making the indoor unit 10 provided by this embodiment more compact in structural layout.

[0117] Specifically, the refrigerant pipe 6 includes a gas pipe 61 and a liquid pipe 62. One end of the gas pipe 61 is connected to the heat exchanger 3, and the other end is connected to the outdoor unit. One end of the liquid pipe 62 is connected to the heat exchanger 3, and the other end is connected to the outdoor unit. Thus, during the refrigeration process, the refrigerant will be transmitted to the heat exchanger 3 in a liquid state through the liquid pipe 62. Then, the heat exchanger 3 will convert the refrigerant from a liquid state to a gaseous state, and then transmit it to the outdoor unit through the gas pipe 61. During this process, the refrigerant will absorb heat and take away the heat to achieve refrigeration. During the heating process, the refrigerant will be transmitted to the heat exchanger 3 in a gaseous state through the gas pipe 61. Then, the heat exchanger 3 will convert the refrigerant from a gaseous state to a liquid state, and then transmit it to the outdoor unit through the liquid pipe 62. During this process, the refrigerant will release heat to achieve heating.

[0118] In the related art, when the installation position of the outdoor unit is in the opposite direction of the joint position of the drain pipe and the refrigerant pipe, at this time, the drain pipe and the refrigerant pipe need to go around the body of the indoor unit for one circle to be connected to the outdoor unit. Thus, the pipe routing is complicated, and the length of the pipe will be increased, increasing the cost. To overcome this defect, in some alternative embodiments, each side plate 1114 has a pipe outlet notch 1116 communicating with the installation cavity 1115. The gas pipe 61, the liquid pipe 62, and the drain pipe 5 can extend out of the installation cavity 1115 through the pipe outlet notch 1116 on any side plate 1114. In this way, the drain pipe 5, the gas pipe 61, and the liquid pipe 62 can extend out of the installation cavity 1115 through the pipe outlet notch 1116 on the side plate 1114 close to the outdoor unit according to the installation position of the outdoor unit, which can avoid winding the pipes outside the indoor unit 10 and make the pipe routing of the indoor unit 10 simpler.

[0119] To avoid damage to the gas pipe 61, the liquid pipe 62, or the drain pipe 5 when passing through the pipe outlet notch 1116, the wall of the pipe outlet notch 1116 is in a smooth transition. Thus, there are no sharp corners on the wall of the pipe outlet notch 1116, so that when the gas pipe 61, the liquid pipe 62, or the drain pipe 5 touches the wall of the pipe outlet notch 1116, it will not be scratched due to touching the sharp corners, resulting in the leakage of the refrigerant or the condensate water. This makes the service life of the drain pipe 5 and the refrigerant pipe 6 longer.

[0120] If the lower part of the above-mentioned pipe outlet notch 1116 is completely open, it will cause the drain pipe 5 and / or the refrigerant pipe 6 to fall after extending out of the installation cavity 1115, which may damage the drain pipe 5 and / or the refrigerant pipe 6. Therefore, a support structure connected to the side plate 1114 can be provided below the pipe outlet notch 1116 to support the drain pipe 5 and / or the refrigerant pipe 6.

[0121] Specifically, please refer to Figure 25, the above-mentioned support structure may be a support member 1117 connected to the side plate 1114. The support member 1117 extends along the width direction of the pipe outlet notch 1116. In this embodiment, the extending direction of the support member 1117 is consistent with the width direction of the indoor unit 10, and the support member 1117 may be a sheet metal part connected to the side plate 1114 and located below the pipe outlet notch 1116, such as a support plate formed by bending. Here, the specific shape of the support member 1117 is not limited.

[0122] In some embodiments, in order to avoid too large a temperature difference between the medium inside the refrigerant pipe 6 and the air outside the refrigerant pipe 6, a heat insulation sleeve 7 may be wrapped around the outside of the refrigerant pipe 6, which can, to a certain extent, prevent condensation from occurring on the inner walls of the gas pipe 61 and the liquid pipe 62.

[0123] It should be noted that there may be two heat insulation sleeves 7, and the two heat insulation sleeves 7 are respectively wrapped around the outside of the gas pipe 61 and the liquid pipe 62; there may also be one heat insulation sleeve 7, and one heat insulation sleeve 7 wraps the gas pipe 61 and the liquid pipe 62 together. In the specific implementation of this embodiment, in order to reduce the manufacturing cost of the indoor unit 10, the heat insulation sleeve 7 is one, that is, the latter situation above. Here, the number of the heat insulation sleeves 7 in this embodiment is not limited.

[0124] Among them, the heat insulation sleeve 7 may be made of materials such as glass wool, rubber and plastic sponge, or polyurethane, etc., so that the heat insulation sleeve 7 has excellent heat insulation performance, corrosion resistance, moisture resistance and other characteristics, and also has good processing performance, and can be processed into various different shapes and thicknesses to adapt to refrigerant pipes 6 of different shapes and sizes.

[0125] In order to enable the heat insulation sleeve 7 to maintain a lasting heat insulation effect, the projection area of the heat insulation sleeve 7 on the side plate 1114 is located within the pipe outlet notch 1116. In this way, it can be avoided that the pipe outlet notch 1116 squeezes the heat insulation sleeve 7, and to a certain extent, the outer wall of the heat insulation sleeve 7 is prevented from being worn, so that the heat insulation sleeve 7 can maintain a lasting heat insulation effect.

[0126] Please continue to refer to Figure 26 , Figure 26 , which is a schematic three-dimensional structure diagram of the water receiving tray in the indoor unit provided by the embodiment of the present application. As Figure 26As shown, in order to facilitate the discharge of water in the water receiving tray 1121 through the drain pipe 5, a drain groove 1140 is provided on the water receiving tray 1121. Specifically, the drain groove 1140 is provided on the bottom wall 1123 of the tray. The drain groove 1140 extends along the length direction of the indoor unit 10. A drain port 1141 communicating with the drain pipe 5 is formed on one side of the drain groove 1140 close to the drain pipe 5; the depth of the drain groove 1140 gradually increases in the direction close to the drain port 1141. In this way, since the height at the drain port 1141 is lower than the height at the water inlet of the drain groove 1140, the water in the drain groove 1140 can flow along the drain groove 1140 towards the drain port 1141, so that the water in the water receiving tray 1121 can be quickly discharged through the drain pipe 5.

[0127] In order to improve the smoothness of water flow in the drain groove 1140, in some embodiments, the bottom wall of the drain groove 1140 is an inclined wall. In this way, the flow resistance of the water flow flowing in the drain groove 1140 is small, so that the water in the water receiving tray 1121 can be quickly discharged from the drain groove 1140.

[0128] In order to prevent the impeller 2 from causing harm to maintenance personnel or users, a protective grille 12 can be provided. Specifically, a part of the structure of the protective grille 12 is located on the side of the impeller 2 close to the air return opening 1131, and another part of the structure of the protective grille 12 is located between the lower part of the impeller 2 and the electronic control box 4. The protective grille 12 is detachably connected to the housing body 11, and the protective grille 12 and the upper shell 1111 of the impeller chamber enclose an impeller chamber 1132. In this way, the impeller 2 can be surrounded to a certain extent to prevent the impeller 2 from causing harm to maintenance personnel or users.

[0129] It should be noted that the above-mentioned protective grille 12 is connected between the first housing 111 and the second housing 112.

[0130] Since the electronic control box 4 needs to be disassembled and assembled through the opening 1118 of the installation cavity 1115, the protective grille 12 located on the side of the electronic control box 4 may interfere with the disassembly and assembly of the electronic control box 4. In order to avoid the interference of the protective grille 12 with the disassembly and assembly of the electronic control box 4 to a certain extent, the relative position between the protective grille 12 and the electronic control box 4 can be restricted. For example, the projections of the protective grille 12 and the electronic control box 4 on the plane where the opening 1118 of the installation cavity 1115 is located do not overlap each other. In this way, the interference of the protective grille 12 with the disassembly and assembly of the electronic control box 4 can be avoided, and it is convenient to disassemble and assemble the electronic control box 4.

[0131] In order to facilitate the disassembly and assembly of the protective grille 12, the protective grille 12 is detachably connected between the first housing 1 and the second housing 1. Specifically, the protective grille 12 is detachably connected between the upper shell 1111 of the impeller chamber and the lower shell 1122 of the diffuser chamber.

[0132] In some specific embodiments, both the upper housing 1111 of the wind wheel cavity and the lower housing 1122 of the diffuser cavity are snap-connected to the protective grille 12. For example, snaps are provided on both sides of the protective grille 12, and slots are respectively provided on the upper housing 1111 of the wind wheel cavity and the lower housing 1122 of the diffuser cavity. The detachable connection between the protective grille 12 and the upper housing 1111 of the wind wheel cavity and the detachable connection between the protective grille 12 and the lower housing 1122 of the diffuser cavity are realized through the cooperation of the snaps and the slots. Here, the specific forms of the snaps and the slots are not limited, and any way that can realize the snap connection between the protective grille 12 and the upper housing 1111 of the wind wheel cavity and between the protective grille 12 and the lower housing 1122 of the diffuser cavity can achieve the purpose of this embodiment.

[0133] Please refer to Figure 27 and Figure 28 , Figure 27 which is a schematic structural diagram of the fourth partial structure of the indoor unit provided by the embodiment of the present application. Figure 28 is Figure 27 A schematic structural diagram in another embodiment. In some embodiments, in order to prevent the projections of the protective grille 12 and the electronic control box 4 on the plane where the orifice 1118 of the installation cavity 1115 is located from overlapping, the protective grille 12 may include a plurality of sequentially connected grille parts 121, and an included angle is provided between each two of the plurality of grille parts 121.

[0134] As Figure 27 shown, in some specific embodiments, the grille part 121 includes a first grille part 1211 and a second grille part 1212. The first grille part 1211 is detachably connected to the lower housing 1122 of the diffuser cavity, and the first grille part 1211 is located between the lower part of the wind wheel 2 and the electronic control box 4; the second grille part 1212 is detachably connected to the upper housing 1111 of the wind wheel cavity, and the second grille part 1212 is located on the side of the wind wheel 2 close to the air return opening 1131.

[0135] Among them, the first grille part 1211 is perpendicular to the plane where the orifice 1118 of the installation cavity 1115 is located, and the second grille part 1212 is parallel to the plane where the orifice 1118 of the installation cavity 1115 is located. In this way, it is convenient to process and manufacture the protective grille 12.

[0136] As Figure 28As shown, in some other specific embodiments, the grille part 121 includes a first grille part 1211, a second grille part 1212, and a third grille part 1213 connected in sequence; the first grille part 1211 is detachably connected to the diffuser chamber lower shell 1122, and the first grille part 1211 is located between the lower part of the wind wheel 2 and the electric control box 4; the third grille part 1213 is detachably connected to the wind wheel chamber upper shell 1111, and the third grille part 1213 is located on the side of the wind wheel 2 close to the air return opening 1131; the included angles between the first grille part 1211 and the second grille part 1212 and between the third grille part 1213 and the second grille part 1212 are both obtuse angles.

[0137] Among them, the first grille part 1211 is perpendicular to the plane where the orifice 1118 of the installation cavity 1115 is located, and the third grille part 1213 is parallel to the plane where the orifice 1118 of the installation cavity 1115 is located. In this way, the air inlet area of the installation cavity 1115 is relatively large, which is beneficial to realizing the heat dissipation of the electric control box 4.

[0138] In some other embodiments, in order to avoid the high sharpness of the protection grille 12, the protection grille 12 can be set to an arc shape, and the distance between the protection grille 12 and the electric control box 4 gradually increases in the direction towards the orifice 1118 of the installation cavity 1115. In this way, it can ensure that the air inlet area at the air inlet of the installation cavity 1115 is relatively large, and it can prevent the protection grille 12 from interfering with the disassembly and assembly of the electric control box 4, which is not only beneficial to the heat dissipation of the electric control box 4, but also convenient for the disassembly and assembly of the electric control box 4.

[0139] Please continue to refer to Figure 29 , Figure 29 which is a schematic structural diagram of the fifth partial structure of the indoor unit provided by the embodiment of the present application. It further includes a motor 8 and a water pump 9. The output shaft of the motor 8 is connected to the wind wheel 2. The water pump 9 is connected to the housing 1, and the water pump 9 is used to pump the condensed water in the water receiving tray 1121 outwards through the drain pipe 5; in this embodiment, the motor 8 and the water pump 9 are located on the same side of the electric control box 4 along the length direction of the electric control box 4. In this way, the structural compactness of the indoor unit 10 provided by this embodiment can be further improved. In addition, it is also convenient for the wiring of the electric control box 4. Specifically, the connecting wire 45 of the electric control box 4 can extend out of the installation cavity 1115 through the same pipe outlet notch 1116 as the drain pipe 5 and the refrigerant pipe 6.

[0140] This embodiment also provides a heating and ventilation equipment, including an outdoor unit and the indoor unit 10 in the above embodiment. Among them, the structure of the indoor unit 10 has been introduced in detail in the above embodiment, and will not be elaborated here.

[0141] It should be noted that this embodiment does not introduce the above outdoor unit in detail.

Claims

1. An indoor unit, characterized in that, It includes a housing, a wind wheel, a heat exchanger, and an electric control box; An air duct is formed inside the housing. The air duct includes a wind wheel chamber, a diffuser chamber, and a heat exchange chamber that are connected in sequence. The wind wheel is arranged in the wind wheel chamber, and the heat exchanger is arranged in the heat exchange chamber; The electric control box is installed on the bottom surface or side surface of the housing so that the electric control box is exposed at the bottom or side of the indoor unit.

2. The indoor unit according to claim 1, characterized in that The electric control box is installed in the middle of the bottom surface of the housing.

3. The indoor unit according to claim 1, characterized in that, The electric control box is located between the wind wheel chamber and the heat exchange chamber.

4. The indoor unit according to claim 3, characterized in that, The air duct has an air return opening communicating with the wind wheel chamber, and the air return opening is formed on the bottom surface or side surface of the housing; An installation cavity is formed on the bottom surface of the housing between the wind wheel chamber and the heat exchange chamber, and the electric control box is installed in the installation cavity.

5. The indoor unit according to claim 4, characterized in that, The air return opening is formed on the bottom surface side of the housing; The installation cavity is formed on the bottom surface of the housing, and the installation cavity is adjacent to the wind wheel chamber.

6. The indoor unit according to claim 5, characterized in that When the indoor unit is in the installed state, it has a length direction, a width direction, and a height direction; The dimension of the installation cavity in the width direction of the indoor unit gradually decreases in the direction away from the air return opening.

7. The indoor unit according to claim 5, characterized in that, The housing includes a water receiving tray and a diffuser chamber lower shell; The water receiving tray defines the bottom wall of the heat exchange chamber. The water receiving tray includes a tray bottom wall and a tray side wall, and the tray side wall is connected between the diffuser chamber lower shell and the tray bottom wall; The tray side wall defines part of the side wall of the installation cavity, and opposite sides of the diffuser chamber lower shell form the bottom wall of the diffuser chamber and the bottom wall of the installation cavity; Wherein, an angle greater than or equal to 90 degrees is formed between the bottom wall of the installation cavity and the side wall of the installation cavity defined by the tray side wall.

8. The indoor unit according to claim 7, characterized in that, The side wall of the installation cavity defined by the tray side wall extends in the height direction of the indoor unit, and there is an angle between this side wall of the installation cavity and the vertical direction; The bottom wall of the installation cavity extends in the width direction of the indoor unit, and there is an angle between the bottom wall of the installation cavity and the horizontal direction.

9. The indoor unit according to claim 8, characterized in that, The angle between the side wall of the installation cavity and the vertical direction is smaller than the angle between the bottom wall of the installation cavity and the horizontal direction.

10. The indoor unit according to claim 5, characterized in that, It further includes a drain pipe and a refrigerant pipe connected to the heat exchanger. The housing includes a water receiving tray, and the water receiving tray defines the bottom wall of the heat exchange chamber. The drain pipe is connected to the water receiving tray; The space between the electric control box and the opening of the installation cavity is available for the drain pipe and the refrigerant pipe to pass through.

11. The indoor unit according to claim 10, characterized in that, The housing further includes two relatively arranged side plates; Each side plate has a pipe outlet notch communicating with the installation cavity, and the refrigerant pipe and the drain pipe can extend out of the installation cavity through the pipe outlet notch on any one of the side plates.

12. The indoor unit according to claim 11, characterized in that, The wall of the pipe outlet notch is in smooth transition.

13. The indoor unit according to claim 11, characterized in that, A support structure is arranged below the pipe outlet notch, and the support structure is connected to the side plate; Wherein, the support structure is configured to support the drain pipe and / or the refrigerant pipe.

14. The indoor unit according to claim 10, characterized in that, A drainage groove is arranged on the water receiving tray, and a drainage opening communicating with the drain pipe is formed on one side of the drainage groove close to the drain pipe; The depth of the drainage groove gradually increases in the direction close to the drainage opening.

15. The indoor unit according to claim 14, characterized in that, The bottom wall of the drainage trough is an inclined wall.

16. The indoor unit according to claim 5, characterized in that, The housing includes a housing body and a protective grille detachably connected to the housing body, and the installation cavity is formed on the bottom surface of the housing body; A part of the structure of the protective grille is located on the side of the wind wheel close to the air return opening, and another part of the structure of the protective grille is located between the lower part of the wind wheel and the electric control box, and the protective grille is detachably connected to the housing body; A wind wheel cavity is formed by enclosing between the protective grille and the housing body.

17. The indoor unit according to claim 16, wherein, The projections of the protective grille and the electric control box on the plane where the opening of the installation cavity is located do not overlap each other.

18. The indoor unit according to claim 16, characterized in that, The housing body 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; The protective grille is detachably connected between the first housing and the second housing.

19. The indoor unit according to claim 18, characterized in that, The protective grille includes a plurality of grille parts connected in sequence, and an included angle is provided between every two of the plurality of grille parts.

20. The indoor unit according to claim 19, characterized in that, The grille part includes a first grille part and a second grille part; The first grille part is detachably connected to the second housing, and the first grille part is located between the lower part of the wind wheel and the electric control box; the second grille part is detachably connected to the first housing, and the second grille part is located on the side of the wind wheel close to the air return opening; Wherein, the first grille part is perpendicular to the plane where the opening of the installation cavity is located; and / or, The second grille part is parallel to the plane where the opening of the installation cavity is located.

21. The indoor unit according to claim 20, wherein, The grille part includes a first grille part, a second grille part and a third grille part connected in sequence; the first grille part is detachably connected to the second housing, and the first grille part is located between the lower part of the wind wheel and the electric control box; the third grille part is detachably connected to the first housing, and the third grille part is located on the side of the wind wheel close to the air return opening; The included angle between the first grille part and the second grille part and the included angle between the third grille part and the second grille part are both obtuse angles; Wherein, the first grille part is perpendicular to the plane where the opening of the installation cavity is located; and / or, The third grille part is parallel to the plane where the opening of the installation cavity is located.

22. The indoor unit according to claim 16, characterized in that, The protective grille is arranged in an arc shape, and the distance between the protective grille and the electric control box gradually increases in the direction towards the opening of the installation cavity.

23. The indoor unit according to claim 1, characterized in that, An air outlet communicated with the heat exchange cavity is formed at one end of the air duct; The size of the heat exchange cavity in the height direction gradually decreases in the direction close to the air outlet.

24. The indoor unit according to claim 23, characterized in that, The inner wall of the heat exchange cavity is smoothly transitioned in the direction close to the air outlet.

25. The indoor unit according to claim 1, characterized in that, It further includes an electric auxiliary heating module, and the electric heating tube of the electric auxiliary heating module is electrically connected to the electric control box; The electric auxiliary heating module is located on the side close to the heat exchange cavity in the diffuser cavity.

26. The indoor unit according to claim 1, characterized in that, It further includes a motor and a water pump, the output shaft of the motor is connected to the wind wheel, and the water pump is connected to the housing; The motor and the water pump are located on the same side of the electric control box along the length direction of the electric control box.

27. The indoor unit according to any one of claims 1 to 26, characterized in that, The electric control box and the housing are detachably connected through a clamping structure and / or a screwing structure.

28. The indoor unit according to claim 27, characterized in that, The electronic control box is detachably connected to one side of the housing along the length direction of the electronic control box through the clamping structure, and the electronic control box is detachably connected to the other side of the housing along the length direction of the electronic control box through the screwing structure; or, The electronic control box is detachably connected to one side of the housing along the width direction of the electronic control box through the clamping structure, and the electronic control box is detachably connected to the other side of the housing along the width direction of the electronic control box through the screwing structure.

29. The indoor unit according to any one of claims 1 to 26, characterized in that, The electronic control box includes a box body, a box cover and an electronic control board assembly; The box body is detachably connected to the housing, the box cover is detachably connected to the box body, and the box cover and the box body define a receiving cavity for receiving the electronic control board assembly.

30. A heating, ventilation and air conditioning (HVAC) device, characterized in that, An indoor unit according to any one of claims 1 to 29 is included.

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