Indoor unit and heating and ventilation equipment

Abstract

The utility model provides an indoor unit and heating and ventilation equipment. The indoor unit comprises a machine shell, a draught fan and an electric control box assembly. A heat exchange air duct is formed in the machine shell and provided with an air return opening, a fan cavity and an air outlet which communicate with one another. The fan is arranged in the fan cavity; the electric control box assembly is installed outside the machine shell, a ventilation hole structure used for communicating the fan cavity with the external environment is arranged on the side wall of the heat exchange air duct, and the ventilation hole structure is used for guiding airflow flowing through the electric control box assembly into the fan cavity. The heat dissipation effect of the electric control box assembly in the indoor unit is good.

Description

Technical Field

[0001] The present application relates to the technical field of air conditioning, and in particular to an indoor unit and a heating and ventilation device using the indoor unit. Background Art

[0002] Generally, the indoor unit includes a casing and an electric control box, wherein the performance of the electric control box affects the performance of the indoor unit as a whole. In addition, the circuit board module in the electric control box will generate more heat during the use of the indoor unit, which will have an adverse effect on the performance of the electric control box. Therefore, in order to make the electric control box have better performance, it is necessary to effectively dissipate the heat generated by the circuit board module.

[0003] In the related art, the housing has two side panels arranged opposite to each other along its length direction, and the electric control box is installed outside the side panels, and the electric control box realizes heat dissipation through the air in the external environment. However, this heat dissipation method makes the heat dissipation effect of the electric control box poor. Utility Model Content

[0004] The embodiments of the present application provide an indoor unit and HVAC equipment, which are used to solve the problem of poor heat dissipation effect of the electric control box in the indoor unit in the related art.

[0005] On the one hand, the present application provides an indoor unit, including a casing, a fan and an electronic control box assembly; a heat exchange air duct is formed inside the casing, and the heat exchange air duct has a connected return air port, a fan cavity and an air outlet; the fan is arranged in the fan cavity; the electronic control box assembly is installed on the outside of the casing, and a ventilation hole structure for connecting the fan cavity with the external environment is provided on the side wall of the heat exchange air duct, and the ventilation hole structure is used to guide the airflow flowing through the electronic control box assembly into the fan cavity.

[0006] As an optional embodiment, the indoor unit provided in the present application also includes a heat exchanger, and the heat exchange air duct also includes a connected pressure diffusion chamber and a heat exchange chamber, and the pressure diffusion chamber is located between the fan chamber and the heat exchange chamber; the heat exchanger is arranged in the heat exchange chamber, and the electrical control box assembly is located between the fan and the heat exchanger; wherein the ventilation hole structure is located between the fan and the electrical control box assembly.

[0007] As an optional embodiment, the casing includes a first shell, a second shell and two side panels; the first shell and the second shell are connected together in the up-down direction, the two side panels are arranged opposite to each other along the length direction of the indoor unit, and the side panels are connected between the first shell and the second shell, so that the first shell, the second shell and the two side panels are enclosed to form a heat exchange air duct; an installation groove for installing an electrical control box assembly is formed on the second shell, and the lower cavity wall of the pressure diffusion cavity and the bottom wall of the installation groove are respectively formed by two shell walls of the second shell opposite to each other in the up-down direction; wherein, the ventilation hole structure connects the fan cavity and the installation groove.

[0008] As an optional implementation, the notch of the mounting slot is arranged downward.

[0009] As an optional embodiment, the second shell includes a lower shell of the pressure diffuser chamber; the top wall of the lower shell of the pressure diffuser chamber forms the lower chamber wall of the pressure diffuser chamber, and the bottom wall of the lower shell of the pressure diffuser chamber forms the bottom wall of the mounting groove; wherein the ventilation hole structure is opened on the lower shell of the pressure diffuser chamber.

[0010] As an optional embodiment, the lower shell of the diffusion chamber includes a shell body and a support member, and two shell walls of the shell body opposite to each other in the up and down directions respectively form the lower chamber wall of the diffusion chamber and the bottom wall of the mounting groove; one end of the support member is connected to the shell body, and the other end of the support member extends between the fan chamber and the mounting groove; wherein the ventilation hole structure includes a first ventilation hole group, and the first ventilation hole group is arranged on a side of the support member away from the shell body to connect the mounting groove with the fan chamber.

[0011] As an optional embodiment, the indoor unit provided in the present application also includes a protective grille connected between the first shell and the support member, and the protective grille is arranged at the return air outlet; the support member includes a first connection part, a second connection part and a third connection part connected in sequence, the first connection part is connected to the shell body, and the third connection part is connected to the protective grille; wherein the first ventilation hole group is arranged on the third connection part.

[0012] As an optional implementation, the first ventilation hole group includes a plurality of first ventilation holes arranged on the third connecting portion; the plurality of first ventilation holes are distributed at intervals along the length direction of the indoor unit.

[0013] As an optional embodiment, the indoor unit provided in the present application also includes a volute tongue structure, and the shell body and the support member are both connected to the volute tongue structure; the volute tongue structure is located between the fan and the support member, and a return channel is formed between the volute tongue structure and the support member, and the return channel is connected to the fan cavity; wherein the ventilation hole structure also includes a second ventilation hole group, the second ventilation hole group is arranged on the support member, the second ventilation hole group is arranged closer to the shell body than the first ventilation hole group, and the second ventilation hole group connects the mounting groove and the return channel.

[0014] As an optional embodiment, the indoor unit provided in the present application also includes a protective grille connected between the first shell and the support member, and the protective grille is arranged at the return air outlet; the support member includes a first connection part, a second connection part and a third connection part connected in sequence, the first connection part is connected to the shell body, and the third connection part is connected to the protective grille; wherein the second ventilation hole group is arranged on the second connection part.

[0015] As an optional implementation, the second ventilation hole group includes a plurality of second ventilation holes arranged on the second connecting portion; the plurality of second ventilation holes are distributed at intervals along the length direction of the indoor unit.

[0016] As an optional embodiment, the electric control box assembly includes a box body, a box cover and a circuit board module; the box body is installed on the shell wall of the casing, and the box cover is arranged on the side of the box body away from the shell wall of the casing, and is enclosed with the box body to form a accommodating cavity for accommodating the circuit board module; a heat dissipation channel is formed on the electric control box assembly, and the heat dissipation channel connects the accommodating cavity and the ventilation hole structure.

[0017] As an optional implementation, the heat dissipation channel includes a first heat dissipation hole; the first heat dissipation hole is formed on the box body and is arranged opposite to the ventilation hole structure to connect the accommodating cavity and the ventilation hole structure.

[0018] As an optional embodiment, the heat dissipation channel also includes a second heat dissipation hole, the first heat dissipation hole and the second heat dissipation hole are respectively opened on opposite sides of the box body, and the first heat dissipation hole is closer to the fan than the second heat dissipation hole; the second heat dissipation hole is used to connect the external environment with the accommodating cavity.

[0019] As an optional implementation manner, the first heat dissipation hole and the second heat dissipation hole are both arranged in plurality at intervals along the length direction of the indoor unit.

[0020] As an optional implementation, a third heat dissipation hole is provided on the second shell; the third heat dissipation hole communicates with the heat exchange cavity and the inlet end of the heat dissipation channel.

[0021] As an optional embodiment, the volute tongue structure and the shell body are both detachably connected to the support member.

[0022] As an optional implementation, the fan cavity has a side wall arranged on the side of the fan away from the heat exchanger, and an air inlet hole is opened on the side wall, and the air inlet hole is used to connect the fan cavity with the external environment.

[0023] On the other hand, the present application provides a HVAC device, including the above-mentioned indoor unit.

[0024] In the indoor unit and HVAC equipment provided in the embodiments of the present application, the electric control box assembly is installed on the outside of the casing, and a ventilation hole structure for connecting the fan cavity and the external environment is provided on the side wall of the heat exchange air duct, and the ventilation hole structure is used to guide the airflow flowing through the electric control box assembly into the fan cavity. Compared with the solution in the related art that the electric control box is installed outside the side panel and only uses the external environment to dissipate the heat of the electric control box, in the indoor unit provided by the present application, not only can the air in the external environment be used to dissipate the heat of the electric control box assembly, but also the pressure difference formed between the external environment and the fan cavity can be used to make the airflow flowing through the electric control box assembly flow into the fan cavity with lower pressure, so that the heat dissipation effect of the electric control box assembly in the indoor unit provided by the present application is better. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0026] Figure 1 A schematic diagram of the three-dimensional structure of the indoor unit provided in an embodiment of the present application;

[0027] Figure 2 An exploded view of the indoor unit provided in an embodiment of the present application;

[0028] Figure 3 A schematic diagram of the planar structure of the indoor unit provided in an embodiment of the present application;

[0029] Figure 4 The first local structure of the indoor unit provided in the embodiment of the present application is along Figure 3 Sectional view in the AA direction;

[0030] Figure 5 for Figure 4 A magnified schematic diagram of the local structure at B in the middle;

[0031] Figure 6 A schematic diagram of the three-dimensional structure of a support member in an indoor unit provided in an embodiment of the present application;

[0032] Figure 7 for Figure 6 A magnified schematic diagram of the local structure at C in the middle;

[0033] Figure 8 A structural schematic diagram of a second partial structure of an indoor unit provided in an embodiment of the present application;

[0034] Fig. 9 for Figure 8 A magnified schematic diagram of the local structure at D in the middle;

[0035] Fig.10 for Figure 8 Schematic diagram of the structure from another perspective;

[0036] Fig.11 for Fig.10 A magnified schematic diagram of the local structure at E in the middle;

[0037] Fig.12 A schematic diagram of the three-dimensional structure of the electric control box assembly provided in an embodiment of the present application;

[0038] Fig.13 for Fig.12 Schematic diagram of the three-dimensional structure from another perspective;

[0039] Fig.14 for Figure 4 Enlarged schematic diagram of the local structure at F in the middle.

[0040] Description of reference numerals:

[0041] 1. Casing; 2. Fan; 3. Heat exchanger; 4. Electric control box assembly; 5. Ventilation hole structure; 6. Snail tongue structure; 7. Foam board; 8. Sheet metal; 9. Reflux channel;

[0042] 10. Indoor unit; 11. First housing; 12. Second housing; 13. Side panel; 14. Heat exchange duct; 41. Box body; 42. Box cover; 43. Accommodating cavity; 44. Heat dissipation channel; 5A. First ventilation hole group; 5B. Second ventilation hole group; 61. First volute tongue; 62. Second volute tongue; 63. Clamping part; 20. Reflux hole; 30. Protective grille;

[0043] 121, lower shell of pressure diffuser chamber; 122, water receiving tray; 123, mounting groove; 141, return air port; 142, fan chamber; 143, pressure diffuser chamber; 144, heat exchange chamber; 145, air outlet; 421, cover body; 422, connecting flange; 441, second heat dissipation hole; 442, first heat dissipation hole; 51A, first ventilation hole; 51B, second ventilation hole;

[0044] 1211, shell body; 1212, support member; 1213, first connection part; 1214, second connection part; 1215, third connection part; 1216, clamping hole; 1221, third heat dissipation hole; 1222, first hole section; 1223, second hole section; 1224, third hole section; 1225, disk body; 1226, first extension part; 1227, second extension part; 1421, air inlet hole. DETAILED DESCRIPTION

[0045] The principles and features of the present application are described below in conjunction with the accompanying drawings. The examples given are only used to explain the present application and are not used to limit the scope of the present application.

[0046] Generally, the indoor unit includes a casing and an electric control box, wherein the performance of the electric control box affects the performance of the indoor unit as a whole. In addition, the circuit board module in the electric control box will generate a lot of heat during the use of the indoor unit, which will have an adverse effect on the performance of the electric control box. Therefore, in order to make the electric control box have better performance, it is necessary to effectively dissipate the heat generated by the circuit board module. In the related art, the casing has two side panels arranged opposite to each other along its length direction, and the electric control box is installed outside the side panels. The electric control box realizes its own heat dissipation through the air in the external environment. However, this heat dissipation method makes the heat dissipation effect of the electric control box poor.

[0047] Therefore, the embodiment of the present application provides an indoor unit and HVAC equipment. In the indoor unit, not only can the air in the external environment be used to dissipate the heat of the electronic control box assembly, but also the pressure difference formed between the external environment and the fan cavity can be used to make the airflow flowing through the electronic control box assembly flow into the fan cavity with lower pressure, so that the heat dissipation effect of the electronic control box assembly in the indoor unit provided by the present application is better.

[0048] The embodiments of the present application will be described in detail below in conjunction with the accompanying drawings and specific implementation methods.

[0049] See also Figure 1 and Figure 2 , Figure 1 A three-dimensional structural diagram of an indoor unit provided in an embodiment of the present application, Figure 2 An exploded diagram of an indoor unit provided in an embodiment of the present application. As shown in the figure, the present embodiment provides an indoor unit 10, including a casing 1, specifically, the casing 1 includes a first shell 11, a second shell 12 and two side plates 13; the first shell 11 and the second shell 12 are connected together in the up-down direction, for example, the first shell 11 can be understood as an upper shell, and the second shell 12 can be understood as a lower shell, the two side plates 13 are arranged opposite to each other along the length direction of the indoor unit 10, and the side plates 13 are connected between the first shell 11 and the second shell 12, so that the first shell 11, the second shell 12 and the two side plates 13 enclose a heat exchange air duct 14.

[0050] It should be noted that the above-mentioned up and down directions are Figure 1 and Figure 2 The vertical direction of the indoor unit is consistent with that of Figure 1 and Figure 2 The xx-axis direction is consistent.

[0051] The connection between the first housing 11 and the side plate 13 and between the second housing 12 and the side plate 13 can be detachable, for example, by fasteners. The material of the housing 1 can be sheet metal or other metal material, and the material of the housing 1 is not specifically limited.

[0052] Please combine Figure 3 and Figure 4 , Figure 3 This is a schematic diagram of the planar structure of the indoor unit provided in the embodiment of the present application. Figure 4 The first local structure of the indoor unit provided in the embodiment of the present application is along Figure 3It is understandable that in order for the indoor unit 10 to work normally, the fan 2 and the heat exchanger 3 need to be arranged in the heat exchange air duct 14. Specifically, the heat exchange air duct 14 includes a return air port 141, a fan cavity 142, a pressure diffuser cavity 143, a heat exchange cavity 144 and an air outlet 145 which are connected in sequence. The fan 2 is arranged in the fan cavity 142, the heat exchanger 3 is arranged in the heat exchange cavity 144, and the inner wall of the first shell 11 forms the cavity side wall of the fan cavity 142, the cavity top wall of the pressure diffuser cavity 143 and the cavity top wall of the heat exchange cavity 144, and the inner wall of the second shell 12 forms the lower cavity wall of the pressure diffuser cavity 143 and the lower cavity wall of the heat exchange cavity 144.

[0053] The return air port 141 may be formed at the bottom of the casing 1 or at the side of the casing 1 . In the present embodiment, the return air port 141 is formed at the bottom of the casing 1 , that is, the return air port 141 is formed on the second shell 12 .

[0054] It should be noted that the indoor unit 10 provided in this embodiment can be installed on the ceiling in the indoor environment, and an external return air inlet will be opened on the ceiling corresponding to the return air inlet 141, and an exhaust outlet will be opened corresponding to the air outlet 145. During the operation of the indoor unit 10, the fan 2 rotates to suck the air flow in the indoor environment. The air flow enters the fan cavity 142 through the external return air inlet and the return air inlet 141 in turn, and after passing through the diffusion cavity 143 and the heat exchange cavity 144, it flows out from the air outlet 145 and the exhaust outlet. The air flow exchanges heat with the heat exchanger 3 in the heat exchange cavity 144, and finally the air flow with changed temperature is discharged to the indoor environment from the exhaust outlet.

[0055] In order to increase the air intake volume and improve the cooling or heating effect of the indoor unit 10, in some optional embodiments, the fan chamber 142 has a side wall located on the side of the fan 2 away from the heat exchanger 3, and an air inlet hole 1421 is opened on the side wall. The air inlet hole 1421 is used to connect the fan chamber 142 with the external environment. In this way, during the operation of the indoor unit 10, the gas in the indoor environment can flow into the fan chamber 142 through the return air port 141 and the air inlet hole 1421 at the same time, so as to improve the cooling or heating effect of the indoor unit 10 provided in this embodiment.

[0056] Furthermore, the fan 2 in this embodiment may be a cross-flow fan. It is understandable that the use of a cross-flow fan will make the indoor unit 10 provided in this embodiment have the characteristics of large air volume, low noise, compact structure, etc.

[0057] Generally, since the indoor unit 10 has different modes when in operation, an electric control module is required. In some implementations, the indoor unit 10 provided in this embodiment also includes an electric control box assembly 4, and the electric control box assembly 4 is installed on the outside of the casing 1. In the related art, the electric control box is installed outside the side panel, and the heat is dissipated from the electric control box only by external airflow. This heat dissipation method has a poor heat dissipation effect.

[0058] Therefore, in this embodiment, a vent structure 5 for connecting the fan chamber 142 with the external environment is provided on the side wall of the heat exchange air duct 14, and the vent structure 5 is used to guide the airflow flowing through the electric control box assembly 4 into the fan chamber 142. It can be understood that during the operation of the indoor unit 10, a negative pressure area is formed in the fan chamber 142. In this way, in the indoor unit 10 provided in this embodiment, not only can the air in the external environment be used to dissipate the heat of the electric control box assembly 4, but also the pressure difference formed between the external environment and the fan chamber 142 can be used to make the airflow flowing through the electric control box assembly 4 flow into the fan chamber 142 with a lower pressure, so that the heat dissipation effect of the electric control box assembly 4 is better.

[0059] In order to allow the airflow passing through the electric control box assembly 4 to flow into the fan cavity 142 through the ventilation hole structure 5 , in one embodiment, the ventilation hole structure 5 may be disposed between the fan 2 and the electric control box assembly 4 .

[0060] Specifically, the electric control box assembly 4 can be installed at the bottom of the second shell 12, and in order to make the structure of the indoor unit 10 provided in this embodiment more compact, a mounting groove 123 can be formed at the bottom of the second shell 12, and the mounting groove 123 is located between the fan cavity 142 and the heat exchange cavity 144, and the mounting groove 123 is located below the pressure diffusion cavity 143, so that the two shell walls of the second shell 12 opposite to each other in the up and down directions form the lower cavity wall of the pressure diffusion cavity 143 and the groove bottom wall of the mounting groove 123, and the electric control box assembly 4 is installed in the mounting groove 123, so that the structure of the indoor unit 10 provided in this embodiment in the up and down directions is more compact, that is, the electric control box assembly 4 is located between the fan 2 and the heat exchanger 3.

[0061] The ventilation hole structure 5 connects the fan cavity 142 and the mounting slot 123. That is, the airflow passing through the electric control box assembly 4 in the mounting slot 123 can flow into the fan cavity 142 through the ventilation hole structure 5 to achieve heat dissipation of the electric control box assembly 4.

[0062] In order to facilitate heat dissipation and disassembly of the electric control box assembly 4, in this embodiment, the notch of the installation slot 123 is set downward. In this way, when the grille at the outer return air outlet is opened, the electric control box assembly 4 is exposed, and at this time, the electric control box assembly 4 can be disassembled and repaired. At the same time, since the electric control box assembly 4 is installed outside the casing 1, it is also convenient to install it. Moreover, when the electric control box assembly 4 is installed outside the casing 1, it is convenient to use the outdoor environment to dissipate heat and cool the electric control box assembly 4.

[0063] In order to form the pressure diffuser chamber 143, in some embodiments, the second shell 12 includes a pressure diffuser chamber lower shell 121; the top wall of the pressure diffuser chamber lower shell 121 forms the lower chamber wall of the pressure diffuser chamber 143, and the bottom wall of the pressure diffuser chamber lower shell 121 forms the bottom wall of the mounting groove 123; wherein the ventilation hole structure 5 is opened on the pressure diffuser chamber lower shell 121.

[0064] Furthermore, in order to form the heat exchange chamber 144 and to collect the condensed water generated on the surface of the heat exchanger 3, the second shell 12 also includes a water receiving tray 122 connected to the lower shell 121 of the diffusion chamber, and the top wall of the water receiving tray 122 forms the lower cavity wall of the heat exchange chamber 144, and the side walls of the water receiving tray 122 form the cavity side walls of the heat exchange chamber 144.

[0065] It can be understood that the main function of the water receiving pan 122 is to collect the condensed water generated by the heat exchanger 3. Therefore, in some situations, in order to prevent condensed water from adhering to the bottom surface of the water receiving pan 122, a foam board 7 can be set at the bottom of the water receiving pan 122, and a sheet metal part 8 can be set at the bottom of the foam board 7, so that the foam board 7 is clamped between the water receiving pan 122 and the sheet metal part 8, and the sheet metal part 8 is detachably connected to the water receiving pan 122 by threaded fasteners such as screws, and the foam board 7 and the sheet metal part 8 are installed together at the bottom of the water receiving pan 122.

[0066] Please combine Figure 5 , Figure 5 for Figure 4 The enlarged schematic diagram of the local structure at B in the figure. Figure 5 The arrow direction in is the flow direction of the heat dissipation airflow. Generally, in order to increase the flow of the fan 2, a volute tongue structure 6 can also be provided. Therefore, the indoor unit 10 provided in this embodiment also includes a volute tongue structure 6 connected to the lower shell 121 of the pressure diffuser chamber; the volute tongue structure 6 is located between the fan 2 and the lower shell 121 of the pressure diffuser chamber, and a return channel 9 is formed between the volute tongue structure 6 and the lower shell 121 of the pressure diffuser chamber, and the return channel 9 is connected to the fan chamber 142.

[0067] During the operation of the indoor unit 10 provided in this embodiment, the airflow driven by the fan 2 is diverted by the volute tongue structure 6 to flow to the pressure diffuser chamber 143 and the side of the volute tongue structure 6 close to the air inlet side of the fan 2 respectively. After the diversion, the pressure of the airflow flowing into the pressure diffuser chamber 143 becomes larger, and the pressure difference at both ends of the return channel 9 causes part of the airflow entering the pressure diffuser chamber 143 to be actively guided back to the air inlet side of the volute tongue structure 6 close to the fan 2 through the return channel 9 to work again. Not only can the pressure on the side close to the volute tongue structure 6 of the fan 2 be compensated, thereby reducing the vortex caused by the pressure difference, effectively improving the operating efficiency of the fan 2, and improving the air intake efficiency and pressure resistance of the air inlet side of the fan 2, but also the aerodynamic noise can be reduced simultaneously.

[0068] In a specific implementation of the present embodiment, in order to form the above-mentioned reflux channel 9 and to enhance the strength of the volute tongue structure 6, the above-mentioned diffuser chamber lower shell 121 includes a shell body 1211 and a support member 1212, and both the shell body 1211 and the support member 1212 are connected to the volute tongue structure 6; the two shell walls of the shell body 1211 opposite to each other in the up and down directions respectively form the lower cavity wall of the diffuser chamber 143 and the bottom wall of the mounting groove 123; the support member 1212 is connected to one side of the shell body 1211 close to the volute tongue structure 6, and forms the reflux channel 9 between the shell body 1211 and the volute tongue structure 6.

[0069] In some embodiments, in order to protect the fan 2 and prevent foreign matter from entering the heat exchange air duct 14 , a protective grille 30 may be connected between the first shell 11 and the support member 1212 , and the protective grille 30 may be located at the return air port 141 .

[0070] Please combine Figure 6 and Figure 7 , Figure 6 This is a schematic diagram of the three-dimensional structure of the support member in the indoor unit provided in an embodiment of the present application. Figure 7 for Figure 6 An enlarged schematic diagram of the local structure at C in the middle. In this embodiment, in order to set the support member 1212, the support member 1212 may include a first connection portion 1213, a second connection portion 1214 and a third connection portion 1215 connected in sequence, the first connection portion 1213 is connected to the shell body 1211, the second connection portion 1214 is connected to the volute tongue structure 6, and the third connection portion 1215 is connected to the protective grille 30.

[0071] Among them, in order to facilitate the assembly of the support member 1212 and the peripheral structure of the support member 1212, in some optional embodiments, a detachable connection method can be adopted between the first connecting portion 1213 and the shell body 1211, for example, a connection method connected by threaded fasteners such as screws; a detachable connection method can also be adopted between the second connecting portion 1214 and the snail tongue structure 6, for example, a snap-fit ​​connection method; a detachable connection method can also be adopted between the third connecting portion 1215 and the protective grille 30, for example, a snap-fit ​​connection method.

[0072] Specifically, the ventilation hole structure 5 may include a first ventilation hole group 5A, which is disposed on the third connection portion 1215 and connects the mounting slot 123 with the fan cavity 142. In this way, the pressure difference between the external environment and the fan cavity 142 can be used to dissipate heat from the electric control box assembly 4.

[0073] In order to improve the heat dissipation effect of the electric control box assembly 4, the first ventilation hole group 5A may include a plurality of first ventilation holes 51A, and the plurality of first ventilation holes 51A are spaced and distributed on the third connection portion 1215 along the length direction of the indoor unit 10. In this way, by providing a plurality of first ventilation holes 51A, the flow of heat dissipation airflow can be accelerated and more airflow can pass through the first ventilation hole group 5A at the same time, so as to improve the heat dissipation effect of the electric control box assembly 4.

[0074] Furthermore, in order to further increase the flow rate of the heat dissipation airflow and the amount of airflow passing through the vent structure 5 per unit time, the vent structure 5 may further include a second vent group 5B, which is disposed on the second connection portion 1214 and is used to connect the mounting slot 123 with the return channel 9. In this way, by disposing the second vent group 5B, the heat dissipation airflow can pass through the vent structure 5 faster, and the amount of airflow passing through the vent structure 5 per unit time will be greater. In this way, with the combination of the first vent group 5A and the second vent group 5B, the heat dissipation effect of the electric control box assembly 4 is better.

[0075] Similarly, the second ventilation hole group 5B may also include a plurality of second ventilation holes 51B, and the plurality of second ventilation holes 51B are spaced and distributed on the second connection portion 1214 along the length direction of the indoor unit 10. In this way, by providing a plurality of second ventilation holes 51B, the flow of heat dissipation airflow can be accelerated and more airflow can pass through the second ventilation hole group 5B at the same time, so as to improve the heat dissipation effect of the electric control box assembly 4.

[0076] It should be noted that the first ventilation hole 51A and the second ventilation hole 51B can be round holes, square holes or holes of other shapes. In the present embodiment, in order to facilitate the processing of the first ventilation hole 51A and the second ventilation hole 51B, the first ventilation hole 51A and the second ventilation hole 51B are round holes.

[0077] The arrangement of the plurality of first ventilation holes 51A and the plurality of second ventilation holes 51B may be one row or multiple rows, and the multiple rows may be arranged along the extension direction of the reflux channel 9. Here, the arrangement of the plurality of first ventilation holes 51A and the plurality of second ventilation holes 51B is not specifically limited.

[0078] Furthermore, in order to facilitate the processing and manufacturing of the volute tongue structure 6, in some embodiments, the volute tongue structure 6 may include a first volute tongue 61 and a second volute tongue 62 that are separately arranged; the first volute tongue 61 and the second volute tongue 62 are arranged along the width direction of the indoor unit 10, and the first volute tongue 61 is located on the side of the second volute tongue 62 close to the fan 2, wherein the first volute tongue 61 and the second volute tongue 62 are separately arranged, which can be understood as the first volute tongue 61 and the second volute tongue 62 are separately molded, and a detachable connection method is adopted between the first volute tongue 61 and the second volute tongue 62, such as a snap-on connection method.

[0079] The width direction of the indoor unit 10 is Figures 1 to 4 The yy-axis direction is consistent.

[0080] In order to further improve the assembly efficiency between the volute tongue structure 6 and the diffuser lower shell 121, in some optional embodiments, the second volute tongue 62 is integrally formed with the shell body 1211 and connected to the support member 1212, and a reflux channel 9 is formed between the second volute tongue 62 and the support member 1212. In other words, the second volute tongue 62 and the support member 1212 are connected in a snap-fit ​​manner.

[0081] Please combine Figure 8 and Fig. 9 , Figure 8 A schematic diagram of a second partial structure of an indoor unit provided in an embodiment of the present application, Fig. 9 for Figure 8 The enlarged schematic diagram of the local structure at D in the middle. As shown in the figure, since the second volute tongue 62 is integrally formed with the shell body 1211, and in order to form the reflux channel 9 between the second volute tongue 62 and the support member 1212, after the second volute tongue 62 and the shell body 1211 are integrally formed, a reflux hole 20 connected to the reflux channel 9 is formed between the second volute tongue 62 and the shell body 1211. In this way, even if the second volute tongue 62 and the shell body 1211 are integrally formed, it will not affect the airflow flowing into the reflux channel 9.

[0082] Please continue to see Fig.10 and Fig.11 , Fig.10 for Figure 8 A schematic diagram of the structure from another perspective. Fig.11 for Fig.10 The enlarged schematic diagram of the local structure at E in the middle. As can be seen from the above, the second volute tongue 62 and the second connecting portion 1214 can be connected in a snap-fit ​​connection manner. Specifically, a snap-fit ​​portion 63 can be provided on the side of the second volute tongue 62 facing the second connecting portion 1214, and correspondingly, a snap-fit ​​hole 1216 can be provided on the second connecting portion 1214 for the snap-fit ​​portion 63 to pass through and snap-fit ​​therewith. The snap-fit ​​connection between the snap-fit ​​portion 63 and the snap-fit ​​hole 1216 realizes the snap-fit ​​connection between the second volute tongue 62 and the support member 1212.

[0083] Please combine Fig.12 and Fig.13 , Fig.12 A schematic diagram of the three-dimensional structure of the electric control box assembly provided in an embodiment of the present application. Fig.13 for Fig.12 Schematic diagram of the three-dimensional structure from another perspective. Generally, the electric control box assembly 4 includes a box body 41, a box cover 42 and a circuit board module (not shown in the figure); the box body 41 is installed on the shell wall of the casing 1, and the box cover 42 is covered on the side of the box body 41 away from the shell wall of the casing 1, and is enclosed with the box body 41 to form a accommodating cavity 43 for accommodating the circuit board module. It can be understood that during the operation of the indoor unit 10, for the electric control box assembly 4, the circuit board module is the main source of heat. Therefore, if the external airflow can pass through the circuit board module, the heat dissipation effect of the electric control box assembly 4 can be further improved.

[0084] Therefore, in some optional embodiments, a heat dissipation channel 44 is formed on the electric control box assembly 4, wherein the heat dissipation channel 44 connects the accommodating cavity 43 and the vent structure 5. In this way, the hot air flow in the accommodating cavity 43 can flow to the vent structure 5 through the heat dissipation channel 44, and then be carried into the fan cavity 142, that is, the heat generated by the circuit board module will be carried into the negative pressure fan cavity 142 to achieve heat dissipation of the electric control box assembly 4.

[0085] In a specific implementation of this embodiment, the heat dissipation channel 44 includes a first heat dissipation hole 442, which is opened on the box body 41 and is opposite to the ventilation hole structure 5 to connect the accommodating cavity 43 and the ventilation hole structure 5. In this way, the heat generated by the circuit board module can flow into the fan cavity 142 through the first heat dissipation hole 442 and the ventilation hole structure 5 to achieve heat dissipation of the electric control box assembly 4.

[0086] Furthermore, the heat dissipation channel 44 can also include a second heat dissipation hole 441. In order to utilize the relatively obvious pressure difference formed by the positive pressure in the heat exchange cavity 144 and the adjacent area of ​​the heat exchange cavity 144 and the negative pressure in the fan cavity 142 to dissipate the heat of the electric control box assembly 4, the first heat dissipation hole 442 and the second heat dissipation hole 441 are respectively opened on opposite sides of the box body 41, and the first heat dissipation hole 442 is arranged closer to the fan 2 than the second heat dissipation hole 441, and the first heat dissipation hole 442 connects the external environment with the accommodating cavity 43.

[0087] In this way, the positive-pressure gas in the outdoor environment adjacent to the heat exchange chamber 144 can flow into the accommodating chamber 43 through the second heat dissipation hole 441, and then the hot air flow in the accommodating chamber 43 is carried to the first heat dissipation hole 442, and then flows into the negative-pressure fan chamber 142 through the first ventilation hole group 5A and the second ventilation hole group 5B. In this way, the pressure difference between the positive-pressure gas in the outdoor environment adjacent to the heat exchange chamber 144 and the negative-pressure gas in the fan chamber 142 can be utilized to achieve heat dissipation of the electrical control box assembly 4.

[0088] In a specific implementation of this embodiment, the box cover 42 includes a cover body 421 and a connecting flange 422 connected together, and a portion of the inner wall surface of the cover body 421 forms a portion of the cavity side wall of the accommodating cavity 43; the connecting flange 422 extends along the side wall of the box body 41 and is connected to the box body 41.

[0089] Furthermore, in order to increase the air inlet area and air outlet area of ​​the heat dissipation channel 44, in the present embodiment, the first heat dissipation hole 442 and the second heat dissipation hole 441 are arranged in a plurality of intervals along the length direction of the indoor unit 10. In this way, in the same time period, the heat generated by the circuit board module can be carried more into the fan cavity 142, and the heat dissipation efficiency of the electric control box assembly 4 can be further improved.

[0090] Moreover, in this embodiment, the plurality of first heat dissipation holes 442 and the plurality of second heat dissipation holes 441 may be arranged in multiple rows, and the arrangement direction of the multiple rows may be consistent with the height direction of the box body 41 .

[0091] It is understandable that if the second heat dissipation hole 441 is connected to the heat exchange cavity 144 , the pressure difference between the positive pressure in the heat exchange cavity 144 and the negative pressure in the fan cavity 142 can be further utilized to better dissipate heat for the electric control box assembly 4 .

[0092] Therefore, please combine Fig.14 , Fig.14 for Figure 4A schematic diagram of the enlarged local structure at F in the middle. As shown in the figure, the second heat dissipation hole 441 is connected to the heat exchange cavity 144 through the third heat dissipation hole 1221. Specifically, the third heat dissipation hole 1221 includes a first hole segment 1222, a second hole segment 1223 and a third hole segment 1224 that are connected in sequence, wherein the first hole segment 1222 and the second hole segment 1223 are both provided on the water receiving tray 122, and the third hole segment 1224 is provided on the lower shell 121 of the pressure diffuser cavity and is connected to the second heat dissipation hole 441.

[0093] Specifically, the water receiving tray 122 includes a tray body 1225, a first extension portion 1226 and a second extension portion 1227. The top wall of the tray body 1225 forms the lower cavity wall of the heat exchange cavity 144. The first extension portion 1226 is connected to the upstream side of the tray body 1225, and extends along the extension direction of the heat exchange air duct 14 toward the lower shell 121 of the pressure diffusion cavity and abuts against the lower shell 121 of the pressure diffusion cavity, and the first hole section 1222 is opened on the first extension portion 1226 and communicates with the heat exchange cavity 144; the second extension portion 1227 is connected to the first extension portion 1226 and extends in a direction set at an angle to the extension direction of the heat exchange air duct 14, the second extension portion 1227 is connected to the lower shell 121 of the pressure diffusion cavity, and the second hole section 1223 is opened on the second extension portion 1227. The third hole section 1224 formed on the lower shell 121 of the pressure diffuser chamber is arranged opposite to the second hole section 1223 formed on the second extension portion 1227 .

[0094] In this way, by setting the first hole section 1222, the second hole section 1223 and the third hole section 1224 which are connected in sequence, the heat exchange chamber 144 can be connected with the second heat dissipation hole 441, so that the pressure difference formed between the heat exchange chamber 144 and the fan chamber 142 can be better utilized to enhance the heat dissipation effect of the electrical control box assembly 4.

[0095] This embodiment further provides a HVAC device, including the indoor unit 10 in the above embodiment. The structure of the indoor unit 10 has been described in detail in the above embodiment, and will not be described again here.

[0096] It should be noted that the HVAC equipment provided in this embodiment should also include other modules or mechanisms such as an outdoor unit. Here, no specific limitation is imposed on the other modules or mechanisms included in the HVAC equipment.

[0097] In the description of the present application, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present application.

[0098] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include at least one of the features. In the description of this application, the meaning of "plurality" is at least two, such as two, three, etc., unless otherwise clearly and specifically defined.

[0099] In this application, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", "fixed" and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements, unless otherwise clearly defined. For ordinary technicians in this field, the specific meanings of the above terms in this application can be understood according to specific circumstances.

[0100] In the present application, unless otherwise clearly specified and limited, a first feature being “above” or “below” a second feature may mean that the first and second features are in direct contact, or the first and second features are in indirect contact through an intermediate medium. Moreover, a first feature being “above”, “above”, and “above” a second feature may mean that the first feature is directly above or obliquely above the second feature, or simply means that the first feature is higher in level than the second feature. A first feature being “below”, “below”, and “below” a second feature may mean that the first feature is directly below or obliquely below the second feature, or simply means that the first feature is lower in level than the second feature.

[0101] In the description of this specification, the description with reference to the terms "one embodiment", "some embodiments", "example", "specific example", or "some examples" etc. means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present application. In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described may be combined in any one or more embodiments or examples in a suitable manner. In addition, those skilled in the art may combine and combine the different embodiments or examples described in this specification and the features of the different embodiments or examples, without contradiction.

[0102] Although the embodiments of the present application have been shown and described above, it can be understood that the above embodiments are exemplary and cannot be understood as limitations on the present application. Ordinary technicians in this field can change, modify, replace and modify the above embodiments within the scope of the present application.

Claims

1. An indoor unit, characterized in that: include: The housing has a heat exchange air duct formed inside, wherein the heat exchange air duct has a return air port, a fan cavity and an air outlet connected to each other; A fan is disposed in the fan cavity; as well as The electric control box assembly is installed outside the casing, and a ventilation hole structure for connecting the fan cavity with the external environment is provided on the side wall of the heat exchange air duct. The ventilation hole structure is used to guide the airflow flowing through the electric control box assembly into the fan cavity.

2. The indoor unit according to claim 1, characterized in that: It also includes a heat exchanger, wherein the heat exchange air duct also includes a pressure diffuser cavity and a heat exchange cavity that are connected, and the pressure diffuser cavity is located between the fan cavity and the heat exchange cavity; The heat exchanger is arranged in the heat exchange cavity, and the electric control box assembly is located between the fan and the heat exchanger; Wherein, the ventilation hole structure is located between the fan and the electric control box assembly.

3. The indoor unit according to claim 2, characterized in that: The housing comprises a first housing, a second housing and two side panels; The first shell and the second shell are connected together in the up-down direction, the two side plates are arranged opposite to each other along the length direction of the indoor unit, and the side plates are connected between the first shell and the second shell, so that the first shell, the second shell and the two side plates enclose the heat exchange air duct; The second housing is formed with a mounting groove for mounting the electric control box assembly, and the lower cavity wall of the pressure diffuser cavity and the bottom wall of the mounting groove are respectively formed by two shell walls of the second housing that are opposite to each other in the up-down direction; Wherein, the ventilation hole structure connects the fan cavity and the mounting groove.

4. The indoor unit according to claim 3, characterized in that: The notch of the installation slot is arranged downward.

5. The indoor unit according to claim 3 or 4, characterized in that: The second housing includes a lower housing of a pressure diffuser chamber; The shell top wall of the lower shell of the pressure diffuser cavity forms the lower cavity wall of the pressure diffuser cavity, and the shell bottom wall of the lower shell of the pressure diffuser cavity forms the groove bottom wall of the mounting groove; Wherein, the ventilation hole structure is opened on the lower shell of the pressure diffuser chamber.

6. The indoor unit according to claim 5, characterized in that: The lower shell of the pressure diffuser cavity comprises a shell body and a support member, and two shell walls of the shell body opposite to each other in the up-down direction respectively form the lower cavity wall of the pressure diffuser cavity and the bottom wall of the mounting groove; One end of the support member is connected to the shell body, and the other end of the support member extends between the fan cavity and the mounting groove; Wherein, the ventilation hole structure includes a first ventilation hole group, and the first ventilation hole group is arranged on a side of the support member away from the shell body to connect the installation groove and the fan cavity.

7. The indoor unit according to claim 6, characterized in that: It also includes a protective grille connected between the first shell and the support member, and the protective grille is arranged at the return air outlet; The support member comprises a first connection portion, a second connection portion and a third connection portion which are connected in sequence, the first connection portion is connected to the shell body, and the third connection portion is connected to the protective grille; Wherein, the first ventilation hole group is arranged on the third connecting portion.

8. The indoor unit according to claim 7, characterized in that: The first ventilation hole group includes a plurality of first ventilation holes arranged on the third connecting portion; A plurality of first ventilation holes are distributed at intervals along the length direction of the indoor unit.

9. The indoor unit according to any one of claims 6 to 8, characterized in that: It also includes a volute tongue structure, and the shell body and the support member are both connected to the volute tongue structure; The volute tongue structure is located between the fan and the support member, and a return flow channel is formed between the volute tongue structure and the support member, and the return flow channel is communicated with the fan cavity; Wherein, the ventilation hole structure also includes a second ventilation hole group, which is arranged on the support member. The second ventilation hole group is arranged closer to the shell body than the first ventilation hole group, and the second ventilation hole group connects the installation groove and the return channel.

10. The indoor unit according to claim 9, characterized in that: It also includes a protective grille connected between the first shell and the support member, and the protective grille is arranged at the return air outlet; The support member comprises a first connection portion, a second connection portion and a third connection portion which are connected in sequence, the first connection portion is connected to the shell body, and the third connection portion is connected to the protective grille; Wherein, the second ventilation hole group is arranged on the second connecting portion.

11. The indoor unit according to claim 10, characterized in that: The second ventilation hole group includes a plurality of second ventilation holes arranged on the second connecting portion; A plurality of the second ventilation holes are distributed at intervals along the length direction of the indoor unit.

12. The indoor unit according to any one of claims 3 to 4, 6 to 8, 10 to 11, characterized in that: The electric control box assembly comprises a box body, a box cover and a circuit board module; The box body is mounted on the shell wall of the casing, and the box cover is arranged on a side of the box body away from the shell wall of the casing and encloses the box body to form a receiving cavity for receiving the circuit board module; A heat dissipation channel is formed on the electric control box assembly, and the heat dissipation channel communicates with the accommodating cavity and the ventilation hole structure.

13. The indoor unit according to claim 12, characterized in that: The heat dissipation channel includes a first heat dissipation hole; The first heat dissipation hole is formed on the box body and is arranged opposite to the ventilation hole structure to connect the accommodating cavity and the ventilation hole structure.

14. The indoor unit according to claim 13, characterized in that: The heat dissipation channel also includes a second heat dissipation hole; The first heat dissipation hole and the second heat dissipation hole are respectively provided on two opposite sides of the box body, and the first heat dissipation hole is arranged closer to the fan than the second heat dissipation hole; The second heat dissipation hole is used to connect the external environment with the accommodating cavity.

15. The indoor unit according to claim 14, characterized in that: The first heat dissipation holes and the second heat dissipation holes are arranged in plurality at intervals along the length direction of the indoor unit.

16. The indoor unit according to claim 14 or 15, characterized in that: The second shell is provided with a third heat dissipation hole; The third heat dissipation hole communicates with the heat exchange cavity and the inlet end of the heat dissipation channel.

17. The indoor unit according to any one of claims 10 to 11, characterized in that: The volute tongue structure and the shell body are both detachably connected to the support member.

18. The indoor unit according to any one of claims 2 to 4, 6 to 8, 10 to 11, 13 to 15, characterized in that: The fan cavity has a side wall arranged on a side of the fan away from the heat exchanger, and an air inlet hole is opened on the side wall. The air inlet hole is used to connect the fan cavity with the external environment.

19. A HVAC equipment, characterized in that: The indoor unit comprises the indoor unit according to any one of claims 1 to 18.

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