Indoor units and HVAC equipment

Abstract

This application provides an indoor unit and HVAC equipment. The indoor unit includes a return air box, a main casing, a heat exchanger, and fasteners. The return air box includes a top plate and multiple side plates connected to the periphery of the top plate. The main casing and the heat exchanger are both disposed within the return air box. The main casing forms a heat exchange cavity, and the heat exchanger is disposed within the heat exchange cavity. Fasteners connect the main casing to the top plate. A sliding groove is formed on the top plate, and the main casing slides within the groove. The axial direction of the fasteners is consistent with the extension direction of the sliding groove. The indoor unit of this application has high assembly efficiency.

Description

Technical Field

[0001] This application relates to the field of heating, ventilation and air conditioning (HVAC) technology, and in particular to an indoor unit and HVAC equipment using the indoor unit. Background Technology

[0002] A ductless air conditioner is a type of air conditioning equipment commonly used indoors. Its main casing is used to install the heat exchanger, and the connection method between the main casing and the return air box directly affects the overall assembly efficiency and stability of the indoor unit.

[0003] In related technologies, the indoor unit includes a return air box, a main casing, a heat exchanger, and a fan. The main casing forms a heat exchange cavity to house the heat exchanger, and the fan is located outside the heat exchange cavity. The main casing, heat exchanger, and fan are all housed inside the return air box. During assembly, the main casing is connected to the top plate of the return air box using screws, with the axis of the screws perpendicular to the assembly direction of the main casing and the return air box.

[0004] However, in the aforementioned indoor unit, since the screw axis is perpendicular to the assembly direction, the assembly process requires operation from an angle perpendicular to the assembly direction after the main housing and return air box are connected. This not only increases the difficulty of operation but also easily leads to low assembly efficiency due to space constraints. Utility Model Content

[0005] This application provides an indoor unit and HVAC equipment that can reduce the difficulty of connecting the main casing and the return air box, thereby improving the assembly efficiency of the indoor unit.

[0006] On one hand, this application provides an indoor unit, including a return air box, a main housing, a heat exchanger, and fasteners. The return air box includes a top plate and a plurality of side plates connected to the periphery of the top plate. The main housing and the heat exchanger are both disposed inside the return air box. The main housing forms a heat exchange cavity, and the heat exchanger is disposed in the heat exchange cavity. Fasteners connect the main housing and the top plate together. A sliding groove is formed on the top plate, and the main housing slides in the sliding groove. The axial direction of the fastener is consistent with the extension direction of the sliding groove.

[0007] As an optional implementation, the top plate includes a top plate component and a sponge, with the sponge installed on the top plate component and sandwiched between the top plate component and the main housing; wherein, the sliding groove is formed by the top plate component and the sponge.

[0008] As an optional implementation, the top plate component includes a top plate body and a groove portion connected to the top plate body; a sponge is installed on the top plate body, the top plate body has a support plate surface facing the sponge, and the groove portion extends from the support plate surface in a direction away from the support plate surface and protrudes; wherein, the sponge has a first opening for the groove portion to pass through, the groove is formed by the groove portion and the sponge, and the main housing is connected to the groove portion by fasteners.

[0009] As an optional implementation, the chute includes a first connecting plate, a mating plate, and a second connecting plate. The first connecting plate is connected between the top plate body and the mating plate, and the second connecting plate is connected to the end of the mating plate along the extension direction of the chute. The plate surface of the first connecting plate and the plate surface of the mating plate both form the sidewall of the chute, and the second connecting plate extends in a direction away from the sponge. The main housing and the second connecting plate are connected by fasteners.

[0010] As an alternative implementation, the top plate component also includes a support portion connected to the top plate body; the sponge has a second opening through which the support portion passes, and the support portion abuts against the main housing.

[0011] As an optional implementation, the support includes two third connecting plates and a support plate connected between the two third connecting plates; the third connecting plates are connected to the top plate body, and the support plate passes through the second opening and abuts against the main housing, and the support plate abuts against the main housing.

[0012] As an optional implementation, the third connecting plate has a positioning hole, and the top plate body is provided with a positioning protrusion that engages with the positioning hole.

[0013] As an optional implementation, a first air outlet is formed on the main housing, and a plurality of enclosure panels include an air outlet enclosure panel, on which a second air outlet is provided opposite to the first air outlet; a flange plate is connected to the main housing, the flange plate is located to the side of the first air outlet, and the flange plate abuts against the air outlet enclosure panel.

[0014] As an optional implementation, the main shell includes a top plate, a chassis, a first side plate, and two second side plates; the top plate and the chassis are arranged opposite to each other, the two second side plates are arranged opposite to each other, the first side plate and the two second side plates are connected between the top plate and the chassis, and the top plate, the chassis, the first side plate and the two second side plates enclose a heat exchange cavity; the top plate is slidably engaged with a sliding groove, and fasteners connect the top plate and the top plate of the box together.

[0015] As an optional implementation, the indoor unit provided in this application also includes a fan, which is installed in the main casing, located inside the return air box, and outside the heat exchange chamber; the top plate includes a main body plate, a sliding part, and a flanged part, the main body plate is disposed opposite to the chassis, the sliding part is connected to the end of the main body plate facing the chassis, and the sliding part is located on the side edge of the main body plate, and the sliding part is slidably engaged with the slide groove; the flanged part is connected to the side of the main body plate near the fan, and the flanged part is connected to the top plate of the casing.

[0016] As an optional implementation, a first connecting hole is provided on the flanged part, and a second connecting hole is provided on the top plate of the box, with the second connecting hole being opposite to the first connecting hole; fasteners pass through the first connecting hole and the second connecting hole in sequence to connect the flanged part and the top plate of the box together.

[0017] On the other hand, this application provides a heating and ventilation device, including an outdoor unit and the aforementioned indoor unit.

[0018] In the indoor unit and HVAC equipment provided in this application, the main housing and the slide groove form a sliding fit, which transforms the assembly process of the main housing and the return air box into a sliding dock along the extension direction of the slide groove. Unlike related technologies, it is no longer necessary to perform multi-angle alignment, which simplifies the positioning operation in the early stage of assembly and makes the assembly process easier to control. Furthermore, once the main housing slides along the groove to the preset assembly position, the operator can directly install fasteners along the extension direction of the groove, eliminating the need to find operating space perpendicular to the assembly direction as required by related technologies. This, to a certain extent, frees the assembly operation from the constraints of space limitations. This unified operating direction not only reduces the operational difficulty during the assembly process and avoids operational errors caused by limited space, but also improves assembly efficiency. Operators do not need to switch between different operating directions, making the assembly actions more fluid and seamless. Meanwhile, the slide rail guides and limits the movement of the main housing, which can effectively prevent the main housing from shifting or misaligning during assembly, ensuring that the fasteners can be accurately connected to the preset position, thereby ensuring the reliability of the connection between the main housing and the return air box. Attached Figure Description

[0019] To more clearly illustrate the technical solutions in the embodiments of this application or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on the structures shown in these drawings without creative effort.

[0020] Figure 1 This is a three-dimensional structural diagram of the indoor unit provided in an embodiment of this application; Figure 2 A schematic diagram of a partial structure of the indoor unit provided in an embodiment of this application; Figure 3 for Figure 2 Enlarged schematic diagram of the local structure at point A; Figure 4 A three-dimensional structural diagram of the top plate component in the indoor unit provided in an embodiment of this application; Figure 5 for Figure 2 A three-dimensional structural diagram of the first partial structure shown; Figure 6 for Figure 5 Enlarged schematic diagram of the local structure at point B; Figure 7A three-dimensional structural diagram of the main housing in the indoor unit provided in an embodiment of this application; Figure 8 for Figure 2 A schematic diagram of the second partial structure of the structure shown; Figure 9 for Figure 5 The diagram shows the exploded structure.

[0021] Explanation of reference numerals in the attached figures: 1. Return air box; 2. Main shell; 3. Heat exchanger; 4. Fan; 5. Flange plate; 11. Top panel; 12. Enclosure panel; 13. Return air vent; 21. Heat exchange chamber; 22. First air outlet; 23. Shell top panel; 24. Chassis; 25. First side panel; 26. Second side panel; 51. First fastening hole; 52. First sub-plate; 53. Second sub-plate; 54. Reinforcing sub-plate; 100. Indoor unit; 111. Slide rail; 112. Top panel; 113. Sponge; 121. Air outlet enclosure; 231. Main body panel; 232. Sliding part; 233. Flanged part; 234. Connecting part; 251. Air inlet; 1121. Mounting groove; 1122. Top plate body; 1123. Sliding groove; 1124. Support plate surface; 1125. First connecting plate; 1126. Mating plate; 1127. Second connecting plate; 1128. Support part; 1129. Third connecting plate; 1130. Support plate; 1140. Positioning hole; 1150. Positioning protrusion; 1160. First support section; 1170. Second support section; 1180. Second connecting hole; 1190. Second fixing hole; 1131. First opening; 1132. Second opening; 1211. Second air outlet; 2331. First connecting hole; 2341. First connecting section; 2342. Second connecting section; 2343. First fixing hole.

[0022] The realization of the purpose, functional features and advantages of this application will be further explained in conjunction with the embodiments and with reference to the accompanying drawings. Detailed Implementation

[0023] The technical solutions in this application will be clearly and thoroughly described below with reference to the accompanying drawings. In the description of the embodiments of this application, unless otherwise stated, " / " means "or," for example, A / B can mean A or B. "And / or" in the text is merely a description of the relationship between related objects, indicating that three relationships can exist. For example, A and / or B can represent: A existing alone, A and B existing simultaneously, and B existing alone. Furthermore, in the description of the embodiments of this application, "multiple" refers to two or more than two.

[0024] Hereinafter, the terms "first" and "second" are used for descriptive purposes only and should not be construed as implying or suggesting relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature.

[0025] Please continue to combine Figures 1 to 3 , Figure 1 This is a three-dimensional structural diagram of the indoor unit provided in an embodiment of this application. Figure 2 This is a schematic diagram of a partial structure of the indoor unit provided in an embodiment of this application. Figure 3 for Figure 2 A magnified view of a partial structure at point A. As shown in the figure, this embodiment provides an indoor unit 100, including a return air box 1, a main housing 2, a heat exchanger 3, and fasteners (not shown in the figure); the return air box 1 includes a top plate 11 and multiple enclosure plates 12 connected to the periphery of the top plate 11; the main housing 2 and the heat exchanger 3 are both disposed inside the return air box 1, the main housing 2 forms a heat exchange cavity 21, and the heat exchanger 3 is disposed in the heat exchange cavity 21; the fasteners connect the main housing 2 and the top plate 11 together; wherein, a sliding groove 111 is formed on the top plate 11, the main housing 2 slides in the sliding groove 111, and the axial direction of the fastener is consistent with the extension direction of the sliding groove 111.

[0026] It should be noted that the fasteners mentioned above can be screws, and the extension direction of the slide groove 111 is consistent with the width direction of the indoor unit 100. The width direction of the indoor unit 100 can be found in [reference needed]. Figures 1 to 3 The YY axis direction in the diagram.

[0027] The main housing 2 and the slide groove 111 form a sliding fit, which transforms the assembly process of the main housing 2 and the return air box 1 into a sliding dock along the extension direction of the slide groove 111. This eliminates the need for multi-angle alignment as in related technologies, simplifies the initial positioning operation of the assembly, and makes the assembly process easier to control. Furthermore, once the main housing 2 slides along the slide groove 111 to the preset assembly position, the operator can directly install fasteners along the extension direction of the slide groove 111, eliminating the need to find operating space perpendicular to the assembly direction as required by related technologies. This, to a certain extent, frees the assembly operation from the constraints of space limitations. This uniformity of operating direction not only reduces the operational difficulty during assembly and avoids operational errors caused by limited space, but also improves assembly efficiency. Operators do not need to switch between different operating directions, making the assembly actions more fluid and smooth. Meanwhile, the slide groove 111 guides and limits the movement of the main housing 2, which can effectively prevent the main housing 2 from shifting or misaligning during assembly, ensuring that the fasteners can be accurately connected to the preset position, thereby ensuring the reliability of the connection between the main housing 2 and the return air box 1.

[0028] In some specific embodiments, to improve the sealing performance of the return air box 1, the top plate 11 may include a top plate component 112 and a sponge 113. The sponge 113 is installed on the top plate component 112 and sandwiched between the top plate component 112 and the main housing 2. The sliding groove 111 is formed by the top plate component 112 and the sponge 113. When the main housing 2 slides along the sliding groove 111 to a preset position, the sponge 113 can alleviate the impact between the main housing 2 and the top plate component 112, preventing component deformation or damage due to improper assembly force control, and further reducing the difficulty of assembly operations.

[0029] Please continue to combine Figure 4 , Figure 4 This is a three-dimensional structural diagram of the top plate component in the indoor unit provided in an embodiment of this application. In this embodiment, the top plate component 112 has a mounting groove 1121, and the sponge 113 is installed in the mounting groove 1121, and the sponge 113 can be adhered to the bottom wall of the mounting groove 1121. Here, there are no specific limitations on the connection method between the sponge 113 and the mounting groove 1121.

[0030] Specifically, the top plate component 112 includes a top plate body 1122 and a groove portion 1123 connected to the top plate body 1122; a sponge 113 is installed on the top plate body 1122, the top plate body 1122 has a support plate surface 1124 facing the sponge 113, and the groove portion 1123 extends and protrudes from the support plate surface 1124 in a direction away from the support plate surface 1124; wherein, the sponge 113 has a first opening 1131 for the groove portion 1123 to pass through, the groove 111 is formed by the groove portion 1123 and the sponge 113, and the main housing 2 is connected to the groove portion 1123 by fasteners.

[0031] The support plate 1124 of the top plate body 1122 provides a stable installation reference for the sponge 113, ensuring that the sponge 113 can accurately fit the top plate body 1122. The sliding groove 1123 extends and protrudes from the support plate 1124 away from the sponge 113, forming an independent and rigid guide structure. This structure retains the cushioning and sealing function of the sponge 113 for the main shell 2, and with the rigidity of the sliding groove 1123, avoids guide deviation caused by excessive deformation of the sponge 113 when the main shell 2 slides, ensuring that the main shell 2 always slides stably along the preset trajectory, further improving the accuracy of assembly positioning.

[0032] It should be noted that the aforementioned support plate surface 1124 is the bottom wall of the aforementioned mounting groove 1121.

[0033] The structure of the slide groove 1123 can be as follows: the slide groove 1123 includes a first connecting plate 1125, a mating plate 1126, and a second connecting plate 1127. The first connecting plate 1125 is connected between the top plate body 1122 and the mating plate 1126, and the second connecting plate 1127 is connected to the end of the mating plate 1126 along the extension direction of the slide groove 111. The surfaces of the first connecting plate 1125 and the mating plate 1126 both form the sidewalls of the slide groove 111, and the second connecting plate 1127 extends in a direction away from the sponge 113. The main housing 2 is connected to the second connecting plate 1127 by fasteners. By limiting the extension direction of the second connecting plate 1127, the installation position of the fastener is closer to the operator's operating view, and there is no obstruction from components such as the sponge 113. The operator does not need to find the installation position in a confined space and can directly and quickly align the fastener with the second connecting plate 1127 and the main housing 2 for connection, further reducing the complexity of the assembly operation.

[0034] Meanwhile, the slide section 1123 structure composed of the first connecting plate 1125, the mating plate 1126, and the second connecting plate 1127 can be manufactured through an integrated molding process during processing. This ensures both the connection strength between the components and the dimensional accuracy of the slide 111 sidewall, preventing the sliding and connection of the main housing 2 from being affected by assembly deviations of the components, thus improving the production consistency and reliability of the overall structure.

[0035] It should be noted that, in order to facilitate the processing of the slide groove 1123, a second connecting plate 1127 can be provided on both sides of the mating plate 1126 along the extension direction of the slide groove 111. This not only improves the structural strength of the slide groove 1123, but also improves the processing efficiency of the slide groove 1123.

[0036] Please continue to combine Figure 5 and Figure 6 , Figure 5 for Figure 2 A three-dimensional structural diagram of the first partial structure shown. Figure 6 for Figure 5 A magnified view of the local structure at point B. (See diagram below.) Figure 3 , Figure 5 and Figure 6 As shown, in order to improve the connection reliability between the main housing 2 and the return air box 1, in some optional embodiments, the top plate 112 further includes a support portion 1128, which is connected to the top plate body 1122; the sponge 113 has a second opening 1132 through which the support portion 1128 passes, and the support portion 1128 abuts against the main housing 2.

[0037] Among them, the support part 1128 applies a stable supporting force to the main housing 2 from the dimension perpendicular to the sliding direction, effectively preventing the main housing 2 from sinking or shifting due to its own weight or vibration during operation. Especially during the operation of the indoor unit 100, the vibration generated by the fan 4 may cause the main housing 2 to shake slightly. The abutting support of the support part 1128 can significantly reduce the amplitude of this shaking, ensure the stable operation of the heat exchanger 3 inside the main housing 2, and further improve the structural reliability of the entire indoor unit 100.

[0038] In some specific embodiments, the support portion 1128 includes two third connecting plates 1129 and a support plate 1130 connected between the two third connecting plates 1129; the third connecting plates 1129 are connected to the top plate body 1122, and the support plate 1130 passes through the second opening 1132 and abuts against the main housing 2. In this way, the flat support plate 1130 can increase the contact area with the main housing 2, avoiding localized pressure and indentation of the main housing 2 due to insufficient contact area. Especially since the heat exchanger 3 is installed inside the main housing 2, the uniform supporting force can protect the heat exchanger 3 from compression damage.

[0039] More specifically, the support plate 1130 includes a first support section 1160 and two second support sections 1170. The first support section 1160 is supported on the main housing 2, and the two second support sections 1170 are connected to both sides of the first support section 1160, corresponding one-to-one with the two third connecting plates 1129, and the second support section 1170 is connected to the corresponding third connecting plate 1129.

[0040] To improve the assembly efficiency between the support plate 1130 and the top plate body 1122, the third connecting plate 1129 has a positioning hole 1140, and the top plate body 1122 has a positioning protrusion 1150, which engages with the positioning hole 1140. Thus, the engagement between the positioning protrusion 1150 and the positioning hole 1140 improves the assembly efficiency between the support plate 1130 and the top plate 112.

[0041] Please continue to combine Figure 7 , Figure 7 This is a three-dimensional structural diagram of the main housing of the indoor unit provided in the embodiment of this application. As shown in the figure, a first air outlet 22 is formed on the main housing 2, and a plurality of enclosure panels 12 include an air outlet enclosure 121. A second air outlet 1211 is provided on the air outlet enclosure 121 opposite to the first air outlet 22. A flange plate 5 is connected to the main housing 2. The flange plate 5 is located to the side of the first air outlet 22 and abuts against the air outlet enclosure 121.

[0042] In this way, the flange plate 5 can directly fill the assembly gap between the main housing 2 and the air outlet plate 121, which to a certain extent avoids the treated air from leaking into the return air box 1 and causing energy loss, and ensures that cold or hot air is output through the second air outlet 1211 to the maximum extent, thereby improving the energy efficiency ratio of the indoor unit 100.

[0043] The structure of the main shell 2 can be as follows: the main shell 2 includes a top plate 23, a chassis 24, a first side plate 25, and two second side plates 26; the top plate 23 and the chassis 24 are arranged opposite to each other, the two second side plates 26 are arranged opposite to each other, the first side plate 25 and the two second side plates 26 are connected between the top plate 23 and the chassis 24, and the top plate 23, the chassis 24, the first side plate 25 and the two second side plates 26 enclose a heat exchange cavity 21; the top plate 23 is slidably engaged with the sliding groove 111, and fasteners connect the top plate 23 and the top plate 11 together.

[0044] This design evenly distributes the weight load of the heat exchanger 3 after installation, preventing deformation of the cavity due to excessive local stress. It ensures that the heat exchanger 3 maintains a stable installation posture within the heat exchange cavity 21, thereby guaranteeing sufficient contact between the air and the heat exchanger 3 during heat exchange and improving heat exchange efficiency. Simultaneously, the regular cavity structure reduces dead zones in airflow within the heat exchange cavity 21, preventing airflow stagnation from affecting the heat exchange effect.

[0045] Please continue to combine Figure 8 , Figure 8 for Figure 2 The diagram shows a planar view of the second partial structure of the structure shown. The flange plate 5 is connected to the corresponding second side plate 26. Specifically, the flange plate 5 has a first fastening hole 51, and the second side plate 26 has a second fastening hole (not shown in the figure). Screws and other threaded fasteners can pass through the first fastening hole 51 and the second fastening hole in sequence to connect the flange plate 5 and the second side plate 26 together.

[0046] The flange plate 5 includes a first sub-plate 52 and a second sub-plate 53 that are connected together and perpendicular to each other. The first sub-plate 52 abuts against the air outlet enclosure 121, and the first fastening hole 51 is opened on the second sub-plate 53, that is, the second sub-plate 53 is connected to the second side plate 26.

[0047] Understandably, to enhance the structural strength of the flange plate 5, a reinforcing sub-plate 54 can be connected between the first sub-plate 52 and the second sub-plate 53, and multiple reinforcing sub-plates 54 can be spaced apart along the height of the indoor unit 100. This enhances the structural strength of the flange plate 5 and ensures effective contact between the flange plate 5 and the air outlet enclosure 121.

[0048] It should be noted that the height direction of the aforementioned indoor unit 100 is related to... Figures 1 to 8 The ZZ axes are aligned.

[0049] In this embodiment, the fan 4 is installed in the main housing 2, the fan 4 is located inside the return air box 1, and the fan 4 is located outside the heat exchange chamber 21. An air inlet 251 opposite to the fan 4 is provided on the first side plate 25.

[0050] In some implementations, in order to meet the air volume requirements of the indoor unit 100, two fans 4 can be set along the length of the indoor unit 100, and correspondingly, multiple air inlets 251 can be set at intervals along the length of the indoor unit 100.

[0051] It should be noted that the length direction of the aforementioned indoor unit 100 is parallel to... Figures 1 to 7 The XX axis direction is consistent.

[0052] Please continue to combine Figure 9 , Figure 9 for Figure 5 The exploded structural diagram of the structure shown is illustrated. As shown, in some specific embodiments, the top plate 23 includes a main plate portion 231, a sliding portion 232, and a flange portion 233. The main plate portion 231 is disposed opposite to the chassis 24. The sliding portion 232 is connected to the end of the main plate portion 231 facing the chassis 24 and is located on the side edge of the main plate portion 231. The sliding portion 232 is slidably engaged with the slide groove 111. The flange portion 233 is connected to the side of the main plate portion 231 near the fan 4 and is connected to the top plate 11.

[0053] Thus, the sliding part 232 is located on the side edge of the main body plate part 231, and can form a lateral guide structure with the slide groove 111, which to a certain extent avoids the main housing 2 from shifting up and down during the sliding process. At the same time, the side edge setting also makes it easier to control the precision of the machining of the sliding part 232, ensuring that the gap with the slide groove 111 is uniform and reducing sliding jamming.

[0054] Specifically, a first connecting hole 2331 is provided on the flange 233, and a second connecting hole 1180 is provided on the second connecting plate 1127. The second connecting hole 1180 is arranged opposite to the first connecting hole 2331. Fasteners pass through the first connecting hole 2331 and the second connecting hole 1180 in sequence to connect the flange 233 to the top plate 11 of the box.

[0055] In some embodiments, to improve the sliding stability of the main housing 2, two spaced sliding grooves 1123 can be provided on the top plate 11 along the length of the indoor unit 100, that is, sliding parts 232 are provided on both sides of the main body plate 231. In this way, the sliding stability of the main housing 2 can be improved, thereby improving the connection reliability between the main housing 2 and the return air box 1.

[0056] like Figure 3 , Figure 4 , Figure 6 and Figure 9 As shown, the main housing 2 also includes a connector 234 connected to the flange 233. The connector 234 includes a first connecting segment 2341 and a second connecting segment 2342 connected together and perpendicular to each other. The first connecting segment 2341 is connected to the flange 233, and the second connecting segment 2342 is connected to the support plate 1130. The first connecting segment 2341 and the flange 233 can be connected together by threaded fasteners such as screws. The second connecting segment 2342 has a first fixing hole 2343, and the support plate 1130 has a second fixing hole 1190. Threaded fasteners such as screws pass through the first fixing hole 2343 and the second fixing hole 1190 in sequence to connect the connector 234 to the support plate 1130. In this way, the support portion 1128 can effectively support the main housing 2.

[0057] It should be noted that after the indoor unit 100 provided in this embodiment is assembled, the top plate 11 is located at the top when in use, and the bottom of the return air box 1 forms a return air inlet 13 that communicates with the indoor space, and a grille can be installed at the return air inlet 13.

[0058] This embodiment also provides a heating, ventilation, and air conditioning (HVAC) device, including an outdoor unit and an indoor unit 100 as described in the above embodiments. The structure of the indoor unit 100 has been described in detail in the above embodiments and will not be repeated here.

[0059] Furthermore, the HVAC equipment provided in this embodiment should also include other components or modules that enable the HVAC equipment to work normally. Here, other components or modules and outdoor units will not be described one by one.

[0060] The HVAC equipment provided in this embodiment achieves high overall assembly efficiency by employing the aforementioned indoor unit 100.

[0061] The above description is merely a specific embodiment of this application, but the scope of protection of this application is not limited thereto. Any variations or substitutions that can be easily conceived by those skilled in the art within the scope of the technology disclosed in this application should be included within the scope of protection of this application. Therefore, the scope of protection of this application should be determined by the scope of the claims.

Claims

1. An indoor unit, characterized in that, include: The return air box includes a top panel and multiple side panels connected to the periphery of the top panel; Both the main shell and the heat exchanger are located inside the return air box. The main shell forms a heat exchange cavity, and the heat exchanger is located in the heat exchange cavity. as well as Fasteners are used to connect the main housing to the top plate of the enclosure; The top plate of the box has a sliding groove, the main housing slides in the sliding groove, and the axial direction of the fastener is consistent with the extension direction of the sliding groove.

2. The indoor unit according to claim 1, characterized in that, The top plate of the box includes a top plate component and a sponge. The sponge is installed on the top plate component and sandwiched between the top plate component and the main shell. The chute is formed by the top plate and the sponge.

3. The indoor unit according to claim 2, characterized in that, The top plate component includes a top plate body and a sliding groove connected to the top plate body; The sponge is installed on the top plate body, the top plate body has a support plate surface facing the sponge, and the sliding groove extends from the support plate surface in a direction away from the support plate surface and protrudes out; The sponge has a first opening through which the sliding groove passes, the sliding groove is formed by the sliding groove and the sponge, and the main housing is connected to the sliding groove by the fastener.

4. The indoor unit according to claim 3, characterized in that, The chute includes a first connecting plate, a mating plate, and a second connecting plate. The first connecting plate is connected between the top plate body and the mating plate, and the second connecting plate is connected to the end of the mating plate along the extension direction of the chute. The surface of the first connecting plate and the surface of the mating plate both form the groove sidewall of the slide, and the second connecting plate extends in a direction away from the sponge; The main housing and the second connecting plate are connected by the fasteners.

5. The indoor unit according to claim 3, characterized in that, The top plate component also includes a support portion, which is connected to the top plate body; The sponge has a second opening through which the support portion passes, and the support portion abuts against the main housing.

6. The indoor unit according to claim 5, characterized in that, The support portion includes two third connecting plates and a support plate connected between the two third connecting plates; The third connecting plate is connected to the main body of the top plate, and the support plate passes through the second opening and abuts against the main housing.

7. The indoor unit according to claim 6, characterized in that, The third connecting plate has a positioning hole, and the top plate body is provided with a positioning protrusion, which cooperates with the positioning hole.

8. The indoor unit according to any one of claims 1 to 7, characterized in that, A first air outlet is formed on the main housing, and the plurality of enclosure panels include an air outlet enclosure panel, wherein a second air outlet is provided on the air outlet enclosure panel opposite to the first air outlet. A flange plate is connected to the main housing. The flange plate is located to the side of the first air outlet and abuts against the air outlet enclosure.

9. The indoor unit according to any one of claims 1 to 7, characterized in that, The main shell includes a top plate, a chassis, a first side plate, and two second side plates; The top shell plate is disposed opposite to the chassis, and the two second side plates are disposed opposite to each other. The first side plate and the two second side plates are connected between the top shell plate and the chassis, and the top shell plate, the chassis, the first side plate and the two second side plates enclose the heat exchange cavity. The top shell plate slides into the groove, and the fasteners connect the top shell plate to the top box plate.

10. The indoor unit according to claim 9, characterized in that, It also includes a fan, which is installed in the main housing, located inside the return air box, and located outside the heat exchange chamber; The top plate of the shell includes a main plate, a sliding part, and a flanged part. The main plate is disposed opposite to the chassis. The sliding part is connected to the end of the main plate facing the chassis and is located on the side edge of the main plate. The sliding part is slidably engaged with the groove. The flanged portion is connected to the side of the main body plate closest to the fan, and the flanged portion is connected to the top plate of the box.

11. The indoor unit according to claim 10, characterized in that, A first connecting hole is provided on the flanged part, and a second connecting hole is provided on the top plate of the box, with the second connecting hole being opposite to the first connecting hole; The fasteners pass through the first connecting hole and the second connecting hole in sequence, connecting the flanged part to the top plate of the box.

12. A heating, ventilation, and air conditioning (HVAC) device, characterized in that, It includes an outdoor unit and an indoor unit as described in any one of claims 1 to 11.

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