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, a heat exchanger and an electric control box assembly, a heat exchange air duct is formed in the machine shell, and the heat exchange air duct is provided with an air return opening, a draught fan cavity, a heat exchange cavity and an air outlet which communicate with one another; the fan is arranged in the fan cavity; the heat exchanger is arranged in the heat exchange cavity; the electric control box assembly is installed outside the machine shell, a ventilation hole structure is formed between the electric control box assembly and the machine shell, and the ventilation hole structure is used for guiding gas located in the heat exchange cavity to the electric control box assembly. 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, a heat exchanger and an electronic control box assembly, a heat exchange air duct is formed inside the casing, and the heat exchange air duct has a return air port, a fan cavity, a heat exchange cavity and an air outlet that are connected; the fan is arranged in the fan cavity; the heat exchanger is arranged in the heat exchange cavity; the electronic control box assembly is installed on the outside of the casing, and a ventilation hole structure is formed between the casing and the casing, and the ventilation hole structure is used to guide the gas located in the heat exchange cavity to the electronic control box assembly.

[0006] As an optional embodiment, the casing includes a first shell, a second shell and two side plates; the first shell and the second shell are connected together in the up and down directions, 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 are enclosed to form a heat exchange air duct; wherein, part of the top wall of the second shell forms the lower cavity wall of the heat exchange cavity, and the ventilation hole structure includes a first ventilation hole structure, and the first ventilation hole structure is formed on the second shell to guide the gas located in the heat exchange cavity to the electrical control box assembly.

[0007] As an optional embodiment, the heat exchange air duct also includes a pressure diffusion chamber, which is located between the fan chamber and the heat exchange chamber and connects the fan chamber and the heat exchange chamber; the second shell includes a pressure diffusion chamber lower shell and a water receiving tray connected together, the shell top wall of the pressure diffusion chamber lower shell forms the lower chamber wall of the pressure diffusion chamber, and the tray top wall of the water receiving tray forms the lower chamber wall of the heat exchange chamber; wherein, the first ventilation hole structure includes a first heat dissipation hole and a second heat dissipation hole that are connected; the first heat dissipation hole is opened on the water receiving tray and is connected to the upstream of the heat exchange chamber; the second heat dissipation hole is opened on the lower shell of the pressure diffusion chamber and is arranged toward the electrical control box assembly.

[0008] As an optional embodiment, the water receiving tray includes a tray body, a first extension portion and a second extension portion; the top wall of the tray body forms the lower cavity wall of the heat exchange cavity, the first extension portion is connected to the upstream side of the tray body and extends along the extension direction of the heat exchange air duct to abut against the lower shell of the pressure diffusion cavity, the second extension portion is connected to the first extension portion and extends toward the bottom of the water receiving tray, and the second extension portion is connected to the lower shell of the pressure diffusion cavity; wherein the first heat dissipation hole includes a first hole section and a second hole section that are connected, the first hole section is opened on the first extension portion and is connected to the upstream of the heat exchange cavity, and the second hole section is opened on the second extension portion and is arranged opposite to and connected to the second heat dissipation hole.

[0009] 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.

[0010] As an optional implementation manner, the number of the second heat dissipation holes is smaller than the number of the first heat dissipation holes, so that a plurality of first heat dissipation holes are connected to the same second heat dissipation hole.

[0011] As an optional embodiment, the electrical control box assembly includes a box body structure and a circuit board module; the box body structure is installed on the shell wall of the casing, and a accommodating cavity for accommodating the circuit board module is formed inside; the ventilation structure also includes a second ventilation hole structure, which connects the first ventilation hole structure and the accommodating cavity to guide the gas located in the heat exchange cavity to the accommodating cavity.

[0012] As an optional embodiment, the box structure includes a box body and a box cover; 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; wherein the second ventilation hole structure includes a third heat dissipation hole, and the third heat dissipation hole is opened on the box body to connect the first ventilation hole structure with the accommodating cavity.

[0013] As an optional embodiment, the second ventilation hole structure connects the first ventilation hole structure and the fan cavity, so that the gas located in the heat exchange cavity flows through the accommodating cavity and is guided to the fan cavity; wherein there is a pressure difference between the gas located in the heat exchange cavity and the gas located in the fan cavity.

[0014] As an optional implementation, the second ventilation hole structure further includes a fourth heat dissipation hole, and the fourth heat dissipation hole is opened on the box cover to connect the accommodating cavity and the fan cavity.

[0015] As an optional implementation, the fourth heat dissipation hole is arranged toward the fan cavity.

[0016] As an optional implementation manner, the third heat dissipation hole and the fourth heat dissipation hole are both arranged in plurality at intervals along the length direction of the indoor unit.

[0017] As an optional embodiment, the box cover includes a cover body and a connecting flange connected together, and a portion of the inner wall surface of the cover body forms a portion of the cavity side wall of the accommodating cavity; the connecting flange extends along the side wall of the box body and is connected to the box body; wherein a fourth heat dissipation hole is provided on the cover body and the connecting flange.

[0018] As an optional implementation, an air guide portion is connected to the inner wall of the box body; the air guide portion covers a partial area of ​​a third heat dissipation hole, and forms an air guide port arranged toward the circuit board module between the air guide portion and the third heat dissipation hole.

[0019] As an optional implementation, in the width direction of the indoor unit, there is a gap between the projected areas of the heat exchanger and the first ventilation hole structure on the horizontal plane.

[0020] As an optional embodiment, a mounting groove for mounting the 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 mounting groove are respectively formed by two shell walls of the second shell opposite to each other in the up and down directions; wherein the first ventilation hole structure connects the upstream of the heat exchange cavity with the mounting groove.

[0021] As an optional implementation, the notch of the mounting slot is arranged downward.

[0022] As an optional implementation, the water receiving tray is detachably connected to the lower shell of the diffuser chamber.

[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 by the embodiment of the present application, the electric control box assembly is installed outside the casing, and a ventilation hole structure is formed between the casing and the electric control box assembly, and the ventilation hole structure is used to guide the gas located in the heat exchange cavity to the electric control box assembly. In this way, 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 positive pressure gas located in the heat exchange cavity can flow to the electric control box assembly through the ventilation hole structure to dissipate the heat of the electric control box assembly, 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 for Figure 3 Cross-sectional view along 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 water receiving tray 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 for Figure 6 Schematic diagram of the structure from another perspective;

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

[0035] Fig.10 A schematic diagram of the connection relationship between the lower shell of the pressure diffuser chamber and the water receiving tray in the indoor unit provided in an embodiment of the present application;

[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 lower shell of the pressure diffusion chamber in the indoor unit provided in an embodiment of the present application;

[0038] Fig.13 for Fig.12A magnified schematic diagram of the local structure at F in the middle;

[0039] Fig.14 A schematic diagram of the three-dimensional structure of an electric control box assembly in an indoor unit provided in an embodiment of the present application;

[0040] Fig.15 for Fig.14 Schematic diagram of the structure from another perspective;

[0041] Fig.16 for Fig.14 A schematic diagram of the structure from another perspective;

[0042] Fig.17 A schematic diagram of the partial structure of an electric control box assembly in an indoor unit provided in an embodiment of the present application;

[0043] Fig.18 for Fig.17 Enlarged schematic diagram of the local structure at G in the middle.

[0044] Description of reference numerals:

[0045] 1. Casing; 2. Fan; 3. Heat exchanger; 4. Electric control box assembly; 5. Ventilation hole structure; 6. Foam board; 7. Sheet metal parts;

[0046] 10. indoor unit; 11. first housing; 12. second housing; 13. side panel; 14. heat exchange air duct; 41. box body; 42. box cover; 43. accommodating chamber; 45. air guide; 46. air guide port; 51. first ventilation hole structure; 52. second ventilation hole structure;

[0047] 121, water tray; 122, pressure diffuser chamber lower shell; 123, mounting slot; 141, air return port; 142, fan chamber; 143, pressure diffuser chamber; 144, heat exchange chamber; 145, air outlet; 421, cover body; 422, connecting flange; 511, first heat dissipation hole; 512, second heat dissipation hole; 521, third heat dissipation hole; 522, fourth heat dissipation hole;

[0048] 1211, disk body; 1212, second extension portion; 1213, latching protrusion; 1214, first extension portion; 1221, latching hole; 1421, air inlet hole; 5111, first hole section; 5112, second hole section. DETAILED DESCRIPTION

[0049] 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.

[0050] 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 on the outside of the side panels. The electric control box realizes its own heat dissipation through the air in the external environment, and the airflow used only comes from the external environment. However, this heat dissipation method makes the heat dissipation effect of the electric control box poor.

[0051] Therefore, the embodiment of the present application provides an indoor unit and HVAC equipment, which can not only use the airflow in the external environment to dissipate the heat of the electric control box assembly, but also use the airflow inside the heat exchange duct to dissipate the heat of the electric control box assembly, so as to achieve better heat dissipation effect on the electric control box assembly.

[0052] It should be noted that the indoor unit provided in this embodiment includes but is not limited to a duct unit.

[0053] The embodiments of the present application will be described in detail below in conjunction with the accompanying drawings and specific implementation methods.

[0054] 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 housing 1, specifically, the housing 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 along the up and 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.

[0055] 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.

[0056] 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.

[0057] 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 for Figure 3 Cross-sectional view along the AA direction. It 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.

[0058] 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 .

[0059] 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.

[0060] 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.

[0061] 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.

[0062] 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.

[0063] Therefore, in this embodiment, a vent structure 5 is formed between the electric control box assembly 4 and the housing 1, and the vent structure 5 is used to guide the gas located in the heat exchange cavity 144 to the electric control box assembly 4. In this way, in the indoor unit 10 provided in this embodiment, not only can the external environment be used to dissipate the heat of the electric control box assembly 4, but also the positive pressure gas located in the heat exchange cavity 144 can be made to flow to the electric control box assembly 4 through the vent structure 5 to dissipate the heat of the electric control box assembly 4, so that the heat dissipation effect of the electric control box assembly 4 is better.

[0064] As for the installation of the electric control box assembly 4, it 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.

[0065] 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. 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.

[0066] It can be understood that when the indoor unit 10 provided in this embodiment is in operation, the airflow first flows to the upstream of the heat exchange chamber 144, and then flows to the downstream of the heat exchange chamber 144 through the heat exchanger 3 and flows out through the air outlet 145. Therefore, the upstream of the heat exchange chamber 144 is closer to the electric control box assembly 4. Therefore, in order to enable the low-temperature airflow to quickly flow to the location of the electric control box assembly 4 to dissipate the heat of the electric control box assembly 4, in some optional embodiments, the vent structure 5 connects the upstream of the heat exchange chamber 144 and the mounting groove 123, that is, the vent structure 5 is used to guide the gas located upstream of the heat exchange chamber 144 to the mounting groove 123, so that the low-temperature airflow can flow to the electric control box assembly 4 through the vent structure 5 to achieve heat dissipation of the electric control box assembly 4. The following is a further introduction taking the upstream connection of the vent structure 5 with the heat exchange chamber 144 as an example.

[0067] In order to form the pressure diffusion chamber 143 and the heat exchange chamber 144, in some specific embodiments, the second shell 12 includes a water receiving tray 121 and a pressure diffusion chamber lower shell 122 connected together; the top wall of the water receiving tray 121 forms the lower chamber wall of the heat exchange chamber 144, the top wall of the pressure diffusion chamber lower shell 122 forms the lower chamber wall of the pressure diffusion chamber 143, and the bottom wall of the pressure diffusion chamber lower shell 122 forms the bottom wall of the mounting groove 123.

[0068] It can be understood that the main function of the water receiving pan 121 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 121, a foam board 6 can be set at the bottom of the water receiving pan 121, and a sheet metal part 7 can be set at the bottom of the foam board 6, so that the foam board 6 is clamped between the water receiving pan 121 and the sheet metal part 7, and the sheet metal part 7 and the water receiving pan 121 are detachably connected by threaded fasteners such as screws, and the foam board 6 and the sheet metal part 7 are installed together at the bottom of the water receiving pan 121.

[0069] 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 the figure is the flow direction of the heat dissipation airflow. In some optional embodiments, the vent structure 5 may include a first vent structure 51, which is formed on the second shell 12 to guide the gas located upstream of the heat exchange cavity 144 to the electric control box assembly 4. In this way, the low-temperature airflow can flow from the heat exchange cavity 144 in the positive pressure zone to the electric control box assembly 4, so as to achieve effective heat dissipation of the electric control box assembly 4.

[0070] It should be noted that, due to the setting of the first vent structure 51, the condensed water generated by the heat exchanger 3 may flow to the bottom of the indoor unit 10 through the vent structure 51, and then flow into the indoor space. Therefore, in order to avoid the occurrence of this phenomenon, in the present embodiment, in the width direction of the indoor unit 10, there is a gap between the first vent structure 51 and the projection area of ​​the heat exchanger 3 on the plane where the return air outlet 141 is located, that is, there is a gap between the projection area of ​​the first vent structure 51 and the heat exchanger 3 on the horizontal plane. In this way, it is possible to prevent the condensed water on the heat exchanger 3 from flowing to the outside of the indoor unit 10 through the vent structure 5.

[0071] The width direction of the indoor unit 10 is Figures 1 to 4 The yy-axis direction is consistent.

[0072] Furthermore, the first vent structure 51 includes a first heat dissipation hole 511 and a second heat dissipation hole 512. The first heat dissipation hole 511 is provided on the water receiving tray 121 and communicates with the upstream of the heat exchange chamber 144. The second heat dissipation hole 512 is provided on the lower shell 122 of the pressure diffusion chamber and is arranged toward the electric control box assembly 4 and communicates with the mounting groove 123. In this way, by providing the first heat dissipation hole 511 and the second heat dissipation hole 512, the low-temperature airflow in the heat exchange chamber 144 can be guided to the location of the electric control box assembly 4 through the first vent structure 51, so as to utilize the airflow in the heat exchange chamber 144 to dissipate heat to the electric control box assembly 4.

[0073] Please combine Figures 6 to 9 , Figure 6 This is a schematic diagram of the three-dimensional structure of the water receiving tray in the indoor unit provided in an embodiment of the present application. Figure 7 for Figure 6 The enlarged schematic diagram of the local structure at C in the middle. Figure 8 for Figure 6 A schematic diagram of the structure from another perspective. Fig. 9 for Figure 8 The enlarged schematic diagram of the local structure at D in the middle. As shown in the figure, the water receiving tray 121 includes a tray body 1211, a first extension portion 1214 and a second extension portion 1212. The top wall of the tray body 1211 forms the lower cavity wall of the heat exchange cavity 144. The first extension portion 1214 is connected to the upstream side of the tray body 1211 and extends along the extension direction of the heat exchange air duct 14 to abut against the lower shell 122 of the pressure diffusion cavity. The second extension portion 1212 is connected to the first extension portion 1214 and extends toward the bottom of the water receiving tray 121 and is connected to the lower shell 122 of the pressure diffusion cavity. The first heat dissipation hole 511 includes a first hole section 511 and a second hole section 512 that are connected. The first hole section 511 is opened on the first extension portion 1414 and is connected to the upstream of the heat exchange cavity 144. The second hole section 512 is opened on the second extension portion 1212 and is arranged opposite to and connected to the second heat dissipation hole 512.

[0074] The second extension portion 1212 extends in the up-down direction, the axial direction of the second hole segment 512 is consistent with the width direction of the indoor unit 10 , and a certain angle may be formed between the axial direction of the first hole segment 511 and the axial direction of the second hole segment 512 .

[0075] In this embodiment, the shape of the installation groove 123 can be restricted to improve the convenience of disassembly and assembly of the electric control box assembly 4 and the heat dissipation effect of the electric control box assembly 4. That is to say, in some embodiments, the size of the groove opening of the installation groove 123 in the width direction of the indoor unit 10 can be larger than the size of the bottom wall of the installation groove 123 in the width direction of the indoor unit 10.

[0076] In order to improve the heat dissipation efficiency of the electric control box assembly 4, the air flow rate flowing through the ventilation hole structure 5 can be increased. Therefore, in this embodiment, the first heat dissipation hole 511 and the second heat dissipation hole 512 can be set to multiple. For example, the first heat dissipation hole 511 and the second heat dissipation hole 512 can be set to multiple in the length direction of the indoor unit 10 and arranged at intervals. The first hole section 511 and the second hole section 512 are set one by one.

[0077] Please combine Fig.10 and Fig.11 , Fig.10 A schematic diagram of the connection relationship between the lower shell of the pressure diffuser chamber and the water receiving tray in the indoor unit provided in an embodiment of the present application, Fig.11 for Fig.10 A schematic diagram of the enlarged local structure at E in the middle. As shown in the figure, in order to reduce the manufacturing cost of the diffuser lower shell 122, the number of the second heat dissipation holes 512 can be made smaller. Therefore, as an optional embodiment, the number of the second heat dissipation holes 512 is less than the number of the first heat dissipation holes 511, so that multiple first heat dissipation holes 511 are connected to the same second heat dissipation hole 512, that is, the first hole segment 511 and the second hole segment 512 are arranged in a one-to-one correspondence, and one second heat dissipation hole 512 corresponds to multiple second hole segments 512.

[0078] Please combine Fig.12 and Fig.13 , Fig.12 This is a schematic diagram of the three-dimensional structure of the lower shell of the pressure diffusion chamber in the indoor unit provided in an embodiment of the present application. Fig.13 for Fig.12 In some embodiments, in order to improve the assembly efficiency of the indoor unit 10 provided in this embodiment, the water receiving tray 121 and the diffuser chamber lower shell 122 can be connected together in a detachable manner, such as by fasteners such as screws or snap-fit ​​connection.

[0079] As shown in the figure, in this embodiment, in order to improve the connection reliability between the water receiving tray 121 and the lower shell 122 of the pressure diffuser chamber, a latching protrusion 1213 can be set at the bottom of the second extension portion 1212, and correspondingly, a latching hole 1221 is opened on the lower shell 122 of the pressure diffuser chamber. Through the snap connection between the latching protrusion 1213 and the latching hole 1221, a detachable connection between the water receiving tray 121 and the lower shell 122 of the pressure diffuser chamber is achieved.

[0080] In order to improve the connection reliability between the water receiving tray 121 and the lower shell 122 of the pressure diffuser chamber, the above-mentioned latching protrusions 1213 and latching holes 1221 can be set in multiple numbers along the length direction of the indoor unit 10, and one latching protrusion 1213 corresponds to one latching hole 1221.

[0081] Please combine Figures 14 to 16 , Fig.14 This is a schematic diagram of the three-dimensional structure of the electric control box assembly in the indoor unit provided in an embodiment of the present application. Fig.15 for Fig.14 A schematic diagram of the structure from another perspective. Fig.16 for Fig.14 A structural diagram from another perspective. Generally, the electric control box assembly 4 includes a box body structure and a circuit board module (not shown in the figure), and the box body structure includes a box body 41 and a box cover 42, wherein the circuit board module may include a circuit board and electrical components arranged on the circuit board. Further, the box body 41 is mounted on the shell wall of the housing 1, that is, the box body 41 is mounted on the bottom wall of the mounting groove 123, and the box cover 42 is arranged on the side of the box body 41 away from the bottom wall of the mounting groove 123, and encloses the box body 41 to form a receiving cavity 43 for accommodating the circuit board module.

[0082] It should be noted that, in order to facilitate the disassembly and assembly of the electric control box assembly 4, the connection between the box body 41 and the lower shell 122 of the pressure diffuser chamber can be a detachable connection, for example, connected by threaded fasteners such as screws. Here, the connection between the box body 41 and the lower shell 122 of the pressure diffuser chamber is not specifically limited.

[0083] It is understandable that in the electric control box assembly 4, it is the circuit board module located in the accommodating cavity 43 that dissipates heat. Therefore, if the airflow flowing out of the heat exchange cavity 144 can flow into the accommodating cavity 43, the heat exchange effect of the electric control box assembly 4 will be better.

[0084] Therefore, in some optional embodiments, the ventilation hole structure 5 further includes a second ventilation hole structure 52 disposed on the box body structure, and the second ventilation hole structure 52 connects the first ventilation hole structure 51 and the accommodating cavity 43 .

[0085] Specifically, the second ventilation hole structure 52 includes a third heat dissipation hole 521 opened on the box body 41, and the third heat dissipation hole 521 connects the first ventilation hole structure 51 and the accommodating cavity 43. That is to say, the low-temperature airflow upstream of the heat exchange cavity 144 can pass through the first hole section 5111, the second hole section 5112, the second heat dissipation hole 512 and the third heat dissipation hole 521 in sequence and then flow into the accommodating cavity 43 to cool the circuit board module located in the accommodating cavity 43.

[0086] It should be noted that the indoor unit 10 has a suction mode and a blowing mode during operation. In the suction mode, the fan cavity 142 is under positive pressure, and the upstream of the heat exchange cavity 144 is under negative pressure. At this time, the gas will flow from the fan cavity 142 to the upstream of the heat exchange cavity 144. In the blowing mode, the fan cavity 142 is under negative pressure, and the upstream of the heat exchange cavity 144 is under positive pressure. At this time, the gas will flow from the upstream of the heat exchange cavity 144 to the fan cavity 142. Therefore, in order to utilize the pressure difference formed between the upstream of the heat exchange cavity 144 and the fan cavity 142 to dissipate heat from the electric control box assembly 4.

[0087] Thus, the second ventilation hole structure 52 can connect the first ventilation hole structure 51 and the fan cavity 142, so that the gas located upstream of the heat exchange cavity 144 flows through the accommodating cavity 43 and is guided to the fan cavity 142. In this way, the air pressure difference formed between the upstream of the heat exchange cavity 144 and the fan cavity 142 can realize gas convection, so as to effectively dissipate heat for the electric control box assembly 4.

[0088] In the following description, the second ventilation hole structure 52 will be further described when the indoor unit 10 is in the blowing mode.

[0089] In a specific implementation of this embodiment, the second ventilation hole structure 52 may further include a fourth heat dissipation hole 522, which is provided on the box cover 42 to connect the accommodating chamber 43 with the fan chamber 142. In this way, the pressure difference formed between the upstream of the heat exchange chamber 144 and the fan chamber 142 can be utilized to make the low-temperature gas located upstream of the heat exchange chamber 144 pass through the first hole section 5111, the second hole section 5112, the second heat dissipation hole 512, the third heat dissipation hole 521, the accommodating chamber 43 and the fourth heat dissipation hole 522 in sequence and then flow to the fan chamber 142, so as to achieve heat dissipation of the electric control box assembly 4.

[0090] In order to allow the fan 2 to draw more heat released by the circuit board module into the fan cavity 142, in this embodiment, the fourth heat dissipation hole 522 is arranged toward the fan cavity 142. In this way, the more heat released by the circuit board module flowing out of the fourth heat dissipation hole 522 can be drawn into the fan cavity 142 by the fan 2, which can prevent the heat released by the circuit board module from flowing into the indoor space, thereby improving the performance of the indoor unit 10 provided by this embodiment.

[0091] Of course, if the low-temperature airflow flowing from the third heat dissipation hole 521 to the accommodating cavity 43 can be blown directly to the circuit board module, the heat dissipation effect of the electric control box assembly 4 can be further improved. Therefore, the airflow flowing from the third heat dissipation hole 521 to the accommodating cavity 43 can be guided to the location of the circuit board module. Fig.17 and Fig.18 , Fig.17 This is a schematic diagram of the partial structure of the electric control box assembly in the indoor unit provided in an embodiment of the present application. Fig.18 for Fig.17 The enlarged schematic diagram of the local structure at G in the middle. In this embodiment, a guide portion 45 is connected to the inner wall of the box body 41; the guide portion 45 covers a part of the third heat dissipation hole 521, and forms a guide port 46 disposed toward the circuit board module between the third heat dissipation hole 521.

[0092] It should be noted that, due to the position of the electric control board module, in this embodiment, the air guide port 46 is arranged toward the box cover 42 .

[0093] In order to realize the connection between the box cover 42 and the box body 41, in some embodiments, the box cover 42 includes a cover body 421 and a connecting flange 422 connected together, and a part of the inner wall surface of the cover body 421 forms a part 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; wherein, the cover body 421 and the connecting flange 422 are both provided with a fourth heat dissipation hole 522. In this way, the heat dissipated by the circuit board module can quickly flow to the external environment through the fourth heat dissipation hole 522.

[0094] Furthermore, in order to improve the heat dissipation efficiency of the electric control box assembly 4, the third heat dissipation hole 521 and the fourth heat dissipation hole 522 can be arranged in a plurality of intervals along the length direction of the indoor unit 10. In this way, the low-temperature airflow can flow into the accommodating chamber 43 quickly and in large quantities, and can quickly flow out of the accommodating chamber 43 through the fourth heat dissipation hole 522, so that the temperature in the accommodating chamber 43 can be permanently maintained at a temperature that enables the electric control box assembly 4 to work normally.

[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, and no specific limitation is imposed on other modules or mechanisms.

[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: A housing having a heat exchange air duct formed therein, wherein the heat exchange air duct has a return air port, a fan cavity, a heat exchange cavity and an air outlet that are connected; A fan is disposed in the fan cavity; A heat exchanger is disposed in the heat exchange chamber; as well as The electric control box assembly is installed outside the casing and a ventilation hole structure is formed between the casing and the electric control box assembly. The ventilation hole structure is used to guide the gas in the heat exchange cavity to the electric control box assembly.

2. The indoor unit according to claim 1, 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; Part of the top wall of the second shell forms the lower cavity wall of the heat exchange cavity, and the ventilation hole structure includes a first ventilation hole structure, which is formed on the second shell to guide the gas located in the heat exchange cavity to the electrical control box assembly.

3. The indoor unit according to claim 2, characterized in that: The heat exchange air duct further includes a pressure diffusion cavity, which is located between the fan cavity and the heat exchange cavity and connects the fan cavity and the heat exchange cavity; The second shell includes a diffuser lower shell and a water receiving tray connected together, The shell top wall of the lower shell of the pressure diffusion chamber forms the lower chamber wall of the pressure diffusion chamber, and the plate top wall of the water receiving plate forms the lower chamber wall of the heat exchange chamber; Wherein, the first ventilation hole structure comprises a first heat dissipation hole and a second heat dissipation hole which are connected; the first heat dissipation hole is opened on the water receiving tray and is connected to the upstream of the heat exchange cavity; The second heat dissipation hole is opened on the lower shell of the pressure diffusion chamber and is arranged toward the electric control box assembly.

4. The indoor unit according to claim 3, characterized in that: The water receiving tray comprises a tray body, a first extending portion and a second extending portion; The top wall of the disk body forms the lower cavity wall of the heat exchange cavity, the first extension portion is connected to the upstream side of the disk body and extends along the extension direction of the heat exchange air duct to abut against the lower shell of the pressure diffuser cavity, the second extension portion is connected to the first extension portion and extends toward the bottom of the water receiving tray, and the second extension portion is connected to the lower shell of the pressure diffuser cavity; The first heat dissipation hole comprises a first hole segment and a second hole segment which are connected. The first hole segment is provided on the first extension portion and is connected to the upstream of the heat exchange cavity. The second hole segment is provided on the second extension portion and is arranged opposite to and connected to the second heat dissipation hole.

5. The indoor unit according to claim 3 or 4, 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.

6. The indoor unit according to claim 5, characterized in that: The number of the second heat dissipation holes is smaller than the number of the first heat dissipation holes, so that a plurality of the first heat dissipation holes are connected to the same second heat dissipation hole.

7. The indoor unit according to any one of claims 2 to 4 and 6, characterized in that: The electric control box assembly comprises a box body structure and a circuit board module, wherein the box body structure is mounted on the shell wall of the housing and has an accommodating cavity formed inside for accommodating the circuit board module; The ventilation hole structure further includes a second ventilation hole structure disposed on the box body structure, wherein the second ventilation hole structure connects the first ventilation hole structure and the accommodating cavity to guide the gas in the heat exchange cavity to the accommodating cavity.

8. The indoor unit according to claim 7, characterized in that: The box structure comprises a box body and a box cover; 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; Wherein, the second ventilation hole structure includes a third heat dissipation hole, and the third heat dissipation hole is opened on the box body to connect the first ventilation hole structure and the accommodating cavity.

9. The indoor unit according to claim 8, characterized in that: The second ventilation hole structure is connected to the first ventilation hole structure and the fan cavity, so that the gas in the heat exchange cavity flows through the accommodating cavity and is guided to the fan cavity; There is a pressure difference between the gas in the heat exchange chamber and the gas in the fan chamber.

10. The indoor unit according to claim 9, characterized in that: The second ventilation hole structure further includes a fourth heat dissipation hole, and the fourth heat dissipation hole is opened on the box cover to connect the accommodating cavity and the fan cavity.

11. The indoor unit according to claim 10, characterized in that: The fourth heat dissipation hole is arranged toward the fan cavity.

12. The indoor unit according to claim 10, characterized in that: The third heat dissipation holes and the fourth heat dissipation holes are arranged in plurality at intervals along the length direction of the indoor unit.

13. The indoor unit according to claim 10, characterized in that: The box cover comprises a cover body and a connecting flange connected together; Part of the inner wall surface of the cover body forms part of the side wall of the accommodating cavity, and the connecting flange extends along the side wall of the box body and is connected to the box body; Wherein, the fourth heat dissipation hole is provided on both the cover body and the connecting flange.

14. The indoor unit according to any one of claims 8 to 13, characterized in that: The inner wall of the box body is connected with a flow guide portion; The air guide portion covers a partial area of ​​the third heat dissipation hole, and forms an air guide port disposed toward the circuit board module between the air guide portion and the third heat dissipation hole.

15. The indoor unit according to any one of claims 2 to 4, 6, 8 to 13, characterized in that: In a width direction of the indoor unit, the heat exchanger and the first vent hole structure have a space between projected areas on a horizontal plane.

16. The indoor unit according to claim 3 or 4, characterized in that: 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 first ventilation hole structure connects the upstream of the heat exchange cavity with the installation groove.

17. The indoor unit according to claim 16, characterized in that: The notch of the installation slot is arranged downward.

18. The indoor unit according to claim 3 or 4, characterized in that: The water receiving tray is detachably connected to the lower shell of the pressure diffuser chamber.

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

Images