Indoor unit, and heating, ventilation and air-conditioning apparatus

Abstract

An indoor unit (10) and a heating, ventilation and air-conditioning apparatus. The indoor unit (10) comprises a housing (1), a fan wheel (2) and an electric motor (4), wherein a heat exchange air duct (113) and a heat dissipation air duct (5) in communication with the heat exchange air duct (113) are formed within the housing (1); the fan wheel (2) is mounted to the housing (1) and located within the heat exchange air duct (113); and the electric motor (4) is mounted to the housing (1) and located within the heat dissipation air duct (5), and the electric motor (4) is in transmission connection with the fan wheel (2).

Description

Indoor unit and HVAC equipment

[0001] This application claims priority of Chinese patent applications submitted to the China Patent Office on January 11, 2024, with application numbers 202410047797.4 and 202420078954.3, both of which have the invention name of "Indoor Unit and HVAC Equipment", all of which are incorporated by reference into this application. Technical Field

[0002] The present application relates to the technical field of air conditioning, and in particular to an indoor unit and a heating and ventilation equipment using the indoor unit. Background Art

[0003] In related technologies, the indoor unit generally includes a casing, a fan and a motor. A heat exchange duct is formed inside the casing. The fan is located in the fan cavity of the heat exchange duct, and the motor is transmission-connected to the fan. The airflow in the external environment can cool the motor through the return air outlet of the heat exchange duct.

[0004] However, in the above-mentioned indoor unit, the heat dissipation effect of the motor is poor, which affects the overall performance of the indoor unit. Summary of the Invention

[0005] The embodiments of the present application provide an indoor unit and HVAC equipment, which are configured to solve the problem of poor heat dissipation of motors in the related art.

[0006] On the one hand, the present application provides an indoor unit, including a shell, a wind wheel and a motor, wherein a heat exchange air duct and a heat dissipation air duct connected to the heat exchange air duct are formed in the shell; the wind wheel is installed in the shell and located in the heat exchange air duct; the motor is installed in the shell and located in the heat dissipation air duct, and the motor is connected to the wind wheel through transmission.

[0007] As an optional embodiment, the housing includes a connected machine casing and motor casing; the motor casing is located within the heat dissipation duct and defines a motor cavity, with the motor disposed within the motor cavity; the heat dissipation duct includes an upstream heat dissipation duct and a downstream heat dissipation duct, with the motor located within the downstream heat dissipation duct, and the upstream and downstream heat dissipation ducts are connected by an opening. In this way, the low-temperature airflow generated by the heat exchanger can flow into the upstream heat dissipation duct and then, through the opening, onto the motor located within the downstream heat dissipation duct, thereby efficiently dissipating the heat generated by the motor.

[0008] As an optional embodiment, the motor housing includes a motor bracket, which includes a baffle structure; the baffle structure forms part of the duct wall of the upstream cooling duct. Thus, the baffle structure can define the upstream cooling duct and the downstream cooling duct, so that low-temperature airflow can flow through the upstream cooling duct and then into the downstream cooling duct to dissipate heat from the motor.

[0009] As an optional embodiment, the side of the partition structure abuts against the housing. This can improve the sealing of the upstream heat dissipation duct, prevent the escape of low-temperature airflow to a certain extent, thereby improving the utilization efficiency of the low-temperature airflow and further improving the heat dissipation effect on the motor.

[0010] As an optional embodiment, the opening is provided on the partition structure, and part of the motor structure is exposed through the opening. In this way, when the low-temperature airflow flows into the upstream heat dissipation duct, it can quickly contact the motor, thereby effectively dissipating heat from the motor.

[0011] As an optional embodiment, the opening includes a heat dissipation hole provided on the wall surface of the motor housing. In this way, after the low-temperature airflow flows into the upstream heat dissipation duct, it can flow into the downstream heat dissipation duct through the heat dissipation hole to dissipate heat from the motor.

[0012] As an optional embodiment, the motor bracket further includes a bracket body connected to the partition structure, the bracket body extending in a direction consistent with the circumference of the motor, and the bracket body protruding upward relative to the partition structure; the motor cavity includes a motor slot provided on the bracket body, and the motor is disposed within the motor slot; the heat dissipation holes include a first heat dissipation hole provided on the slot wall of the motor slot; wherein the top surface of the bracket body and the top surface of the partition structure together form a portion of the duct wall of the upstream heat dissipation duct. Since gas flows from top to bottom, when the bracket body protrudes toward the top relative to the partition structure, the low-temperature airflow can quickly flow into the first heat dissipation hole provided on the bracket body when it reaches the motor bracket, and then flow into the downstream heat dissipation duct to dissipate heat from the motor.

[0013] As an optional embodiment, the motor includes a motor body and end caps connected to both axial ends of the motor body. The distance between the top of the bracket body and the surface of the partition structure is equal to the radius of the motor body. This allows the distance between the partition structure and the top of the bracket body to be limited, allowing more low-temperature air to flow quickly into the first heat dissipation hole, thereby achieving efficient heat dissipation from the motor.

[0014] As an optional embodiment, the first heat dissipation hole extends along the circumference of the motor and covers at least a quarter of the outer peripheral wall of the motor. In this way, more low-temperature airflow can quickly flow to the surface of the motor to quickly dissipate heat from the motor.

[0015] As an optional embodiment, there are multiple first heat dissipation holes; the multiple first heat dissipation holes include multiple groups of heat dissipation holes spaced apart along the circumference of the motor, and each heat dissipation hole group includes at least one first heat dissipation hole spaced apart along the axial direction of the motor. In any heat dissipation hole group, the projected area of ​​the first heat dissipation hole at the end of the heat dissipation hole group on the motor extends from the peripheral wall of the motor body to the end face of the end cover. This allows low-temperature airflow to flow to both the motor body and the end cover simultaneously, allowing a larger area of ​​the motor surface to be exposed to the low-temperature airflow, further improving the heat dissipation efficiency of the motor.

[0016] As an optional embodiment, the motor bracket further includes a side panel structure connected to the bracket body, positioned between the motor and the impeller. The heat exchange and cooling ducts are located on either side of the side panel structure, and the cooling ducts are enclosed by the housing and the side panel structure. Thus, the side panel structure allows the heat exchange and cooling ducts to be independently separated, allowing low-temperature airflow to flow directly to the upstream cooling duct. Combined with the baffle mechanism and the structural design of the bracket body, the upper structure of the motor bracket can guide the low-temperature airflow to a certain extent, thereby improving the heat dissipation efficiency of the motor.

[0017] As an optional implementation, the indoor unit provided in this embodiment further includes a heat exchanger; the heat exchange duct includes a rotor cavity and a heat exchange cavity, the rotor is disposed within the rotor cavity, and the heat exchanger is disposed within the heat exchange cavity; the side panel structure extends from the rotor cavity to the heat exchange cavity, and the side panel structure covers the rotor cavity in its own extension direction. Furthermore, the sealing of the heat dissipation duct can be improved. While guiding the low-temperature airflow, a larger amount of low-temperature airflow can flow into the upstream heat dissipation duct, and then flow through the first heat dissipation hole into the downstream heat dissipation duct to effectively dissipate heat from the motor.

[0018] As an optional implementation, the indoor unit provided in this embodiment further includes a heat exchanger. The heat exchange air duct includes a heat exchange cavity. The heat exchanger is disposed within the heat exchange cavity, and at least a portion of the heat dissipation holes are located on the side of the motor housing facing the heat exchange cavity. This shortens the distance between the heat dissipation holes and the air inlet side of the heat exchanger, allowing low-temperature air to quickly flow to the motor surface, thereby improving heat dissipation efficiency.

[0019] As an optional embodiment, the heat exchange duct also includes an air outlet connected to the heat exchange chamber; the inlet end of the heat dissipation duct is located on the side of the heat exchanger away from the air outlet. In this way, the low-temperature airflow can quickly flow to the location of the motor to dissipate heat from the motor.

[0020] As an optional embodiment, the heat exchange duct further includes a rotor cavity communicating with the heat exchange chamber, with the rotor located within the rotor cavity. The heat dissipation duct is located to one side of the heat exchange duct and extends from the heat exchange chamber to the rotor cavity. This allows the indoor unit to maintain its overall dimensions, improving the overall compactness of the indoor unit provided by this embodiment.

[0021] As an optional embodiment, the heat exchange duct further includes a return air port communicating with the impeller cavity; the outlet of the heat dissipation duct is positioned adjacent to the return air port. This allows at least a portion of the airflow exiting the outlet of the heat dissipation duct to be drawn into the heat exchange duct by the impeller through the return air port, thereby improving the operating efficiency of the indoor unit provided by this embodiment.

[0022] As an optional embodiment, the motor housing further includes a motor cover that is snapped onto the underside of the motor bracket, with the motor cover and the motor bracket enclosing a motor cavity. The heat dissipation holes further include second heat dissipation holes formed in the motor cover. Thus, when low-temperature air flows into the motor cavity through the first heat dissipation holes, it cools the motor and then flows out of the motor cavity through the second heat dissipation holes.

[0023] As an optional embodiment, there are multiple second heat dissipation holes, and the multiple second heat dissipation holes are arranged in rows and columns. In this way, the airflow after cooling the motor can flow out quickly through the second heat dissipation hole, which can further improve the heat dissipation effect of the motor.

[0024] As an optional embodiment, the casing includes a first shell and a second shell connected to each other; the motor casing is connected to the first shell, and the first shell, the second shell and the motor casing cooperate to define a heat exchange air duct and a heat dissipation air duct.

[0025] On the other hand, the present application provides a HVAC equipment including the above-mentioned indoor unit.

[0026] In the indoor unit and HVAC equipment provided in the embodiments of the present application, a heat dissipation duct connected to the heat exchange duct is formed within the housing, and the motor is located within the heat dissipation duct. This allows the airflow within the heat exchange duct to flow into the heat dissipation duct to dissipate heat from the motor. Compared to the related art method of cooling the motor by external airflow entering through the return air vent, in the embodiments of the present application, the airflow within the heat exchange duct can be used to dissipate heat from the motor, thereby improving the heat dissipation effect of the motor and thus enhancing the performance of the indoor unit provided in the embodiments of the present application. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] FIG1 is a schematic structural diagram of an indoor unit provided in an embodiment of the present application;

[0028] FIG2 is an exploded view of an indoor unit provided in an embodiment of the present application;

[0029] FIG3 is a structural diagram of a first partial structure of an indoor unit provided in an embodiment of the present application;

[0030] FIG4 is a schematic plan view of a second partial structure of an indoor unit provided in an embodiment of the present application;

[0031] FIG5 is a cross-sectional view taken along the AA direction in FIG4 ;

[0032] FIG6 is a schematic three-dimensional structural diagram of a third partial structure of the indoor unit provided in an embodiment of the present application;

[0033] FIG7 is an enlarged schematic diagram of the local structure at point B in FIG5 ;

[0034] FIG8 is a schematic diagram of the structure of the motor housing and the motor in the indoor unit provided by an embodiment of the present application;

[0035] FIG9 is a schematic perspective view of a fourth partial structure of an indoor unit provided in an embodiment of the present application;

[0036] FIG10 is an enlarged schematic diagram of the local structure at point C in FIG9 ;

[0037] FIG11 is an enlarged schematic diagram of the local structure at point D in FIG5 .

[0038] Explanation of the reference numerals: 1. housing; 2. wind wheel; 3. heat exchanger; 4. motor; 5. cooling air duct; 6. electric control box; 7. protective grille; 10. indoor unit; 11. housing; 12. motor housing; 41. motor body; 42. end cover; 51. upstream cooling air duct; 52. downstream cooling air duct; 53. opening; 61. box cover; 62. box body; 111. first housing; 112. second housing; 113. heat exchange air duct; 121. motor cavity; 122. cooling hole; 123. motor bracket; 124. motor cover; 1111. top housing; 1112. side panel; 1121. concave cavity; 1131. return air outlet; 1132. air outlet; 1133. wind wheel cavity; 1134. Diffuser chamber; 1135, heat exchange chamber; 1221, first heat dissipation hole; 1222, second heat dissipation hole; 1231, motor slot; 1232, bracket body; 1233, first connecting part; 1234, second connecting part; 1235, side panel structure; 1236, first wall; 1237, second wall; 1238, partition structure. DETAILED DESCRIPTION

[0039] In order to make the objectives, technical solutions and advantages of the present application clearer, the embodiments of the present application will be described in further detail below with reference to the accompanying drawings.

[0040] When the following description refers to the accompanying drawings, unless otherwise indicated, the same numbers in different drawings represent the same or similar elements. The embodiments described in the following exemplary embodiments do not represent all embodiments consistent with the present application. Instead, they are merely examples of devices and methods consistent with certain aspects of the present application, as detailed in the appended claims.

[0041] In the prior art, an indoor unit typically includes a housing, a fan, and a motor. A heat exchange duct is formed within the housing, and the fan is located within the fan cavity of the heat exchange duct. The motor is transmission-connected to the fan and is mounted on a baffle forming the fan cavity. Airflow from the external environment can cool the motor through the return air vent of the heat exchange duct. However, in these indoor units, the motor's heat dissipation is poor, impacting the overall performance of the indoor unit.

[0042] Therefore, the embodiments of the present application provide an indoor unit and HVAC equipment that can solve the problem of poor heat dissipation of the above-mentioned motor.

[0043] The embodiments of the present application will be described in detail below with reference to the accompanying drawings and specific implementation methods.

[0044] Please refer to Figures 1 and 2. Figure 1 is a structural schematic diagram of the indoor unit provided in an embodiment of the present application, Figure 2 is an exploded view of the indoor unit provided in an embodiment of the present application, and Figure 3 is a structural schematic diagram of the first local structure of the indoor unit provided in an embodiment of the present application. As shown in Figures 1 to 3, this embodiment provides an indoor unit 10, including a shell 1, the shell 1 includes a machine casing 11 and a motor casing 12, the machine casing 11 includes a first shell 111 and a second shell 112, the first shell 111 and the second shell 112 are connected together along the up and down direction of the indoor unit 10, and the first shell 111 includes a top shell 1111 and a side plate 1112, the side plate 1112 is connected between the top shell 1111 and the second shell 112; the motor casing 12 is connected to the first shell 111, and is enclosed with the first shell 111 and the second shell 112 to form a heat exchange duct 113, the two ends of the heat exchange duct 113 are a return air port 1131 and an air outlet 1132, and a wind wheel cavity 1133, a pressure diffusion cavity 1134 and a heat exchange cavity 1135 connected in sequence are formed between the return air port 1131 and the air outlet 1132.

[0045] A wind wheel 2 is provided in the wind wheel cavity 1133 , and a heat exchanger 3 is provided in the heat exchange cavity 1135 .

[0046] Please refer to Figures 4 to 6. Figure 4 is a schematic plan view of the second partial structure of the indoor unit provided in an embodiment of the present application. Figure 5 is a cross-sectional view of Figure 4 along the AA direction. Figure 6 is a schematic three-dimensional view of the third partial structure of the indoor unit provided in an embodiment of the present application. The arrow in Figure 6 indicates the flow direction of the low-temperature airflow. Generally, to drive the wind wheel 2 to rotate, a motor cavity 121 is formed within the motor housing 12. The motor 4 is disposed within the motor cavity 121 and is in transmission connection with the wind wheel 2.

[0047] Specifically, in order to utilize the low-temperature airflow generated by the heat exchanger 3 to dissipate heat from the motor 4, in this embodiment, a heat dissipation duct 5 is formed between the housing 1 and the heat exchanger 3. The heat dissipation duct 5 is connected to the heat exchange duct 113, and the motor 4 and the motor housing 12 are both located within the heat dissipation duct 5. In this way, the low-temperature airflow generated by the periphery of the heat exchanger 3 can flow out of the heat exchange cavity 1135 and flow to the motor 4 located within the heat dissipation duct 5 to dissipate heat from the motor 4, thereby improving the performance of the indoor unit 10 provided by this embodiment.

[0048] It needs to be explained that when the indoor unit 10 provided in this embodiment is working, the heat exchanger 3 will generate low-temperature airflow, and the temperature of the low-temperature airflow is lower than the heating temperature when the motor is working. Since the air pressure in the heat exchange cavity 1135 is greater than the air pressure at the bottom of the motor casing 12, the low-temperature airflow generated by the heat exchanger 3 can be prompted to flow to the heat dissipation duct 5 under the action of the air pressure difference, thereby utilizing the low-temperature airflow to cool and dissipate the heat of the high-temperature motor 4.

[0049] Please refer to Figure 3, in which the direction of the arrow is the direction of air flow when the indoor unit 10 is working. Therefore, when the indoor unit 10 provided in this embodiment is in the cooling state, the air flow first contacts the side of the heat exchanger 3 away from the air outlet 1132, and then flows out through the heat exchanger 3. Therefore, the side of the heat exchanger 3 away from the air outlet 1132 is closer to the heat dissipation duct 5. Therefore, in order to increase the speed of the low-temperature air flow to the location of the motor 4 to dissipate heat from the motor 4. In some optional embodiments, the inlet end of the heat dissipation duct 5 can be located on the side of the heat exchanger 3 away from the air outlet 1132, that is, the low-temperature air flow located on the air inlet side of the heat exchanger 3 can flow into the heat dissipation duct 5 to cool the motor 4.

[0050] Referring to Figure 6 , in a specific implementation of this embodiment, the heat dissipation duct 5 is located on one side of the heat exchange duct 113 along the length of the indoor unit 10 and extends from the heat exchange cavity 1135 to the wind wheel cavity 1133. That is, the heat dissipation duct 5 and the heat exchange duct 113 are arranged side by side along the length of the indoor unit 10. Thus, even with the formation of the heat dissipation duct 5, the overall size of the indoor unit 10 itself remains unchanged, thereby improving the overall compactness of the indoor unit 10 provided by this embodiment.

[0051] It should be noted that the longitudinal direction of the indoor unit 10 is consistent with the xx-axis direction in Figures 1, 2, 4 and 6. In the following description, the longitudinal direction of the indoor unit 10 will not be repeatedly limited.

[0052] It is understandable that when the motor 4 is running, the wind wheel 2 will rotate, thereby sucking the external airflow into the heat exchange duct 113 through the return air port 1131. Therefore, in order to reuse the low-temperature airflow flowing out of the motor housing 12, the outlet end of the heat dissipation duct 5 can be set at a position adjacent to the return air port 1131. Since the air pressure at the return air port 1131 is lower than that at the air outlet 1132, when the outlet end of the heat dissipation duct 5 is set adjacent to the return air port 1131, a lower air pressure can be formed at the outlet end of the heat dissipation duct 5, thereby forming a pressure difference with the inlet of the heat dissipation duct. Under the action of the pressure difference, part of the low-temperature airflow at the air outlet 1132 will flow along the heat dissipation duct 5, thereby achieving cooling and heat dissipation of the motor 4.

[0053] Since the motor is arranged in the motor cavity 121 inside the motor housing 12, in order to guide the low-temperature airflow generated by the heat exchanger 3 to flow to the motor 4, it is necessary to open a heat dissipation hole 122 on the side wall of the motor housing 12, and the heat dissipation hole 122 passes through the side wall of the motor housing 12.

[0054] Specifically, the heat dissipation duct 5 includes an upstream heat dissipation duct 51 and a downstream heat dissipation duct 52, with the fan 4 located in the downstream heat dissipation duct 52. The upstream heat dissipation duct 51 and the downstream heat dissipation duct 52 are connected via an opening 53. This allows the low-temperature airflow generated by the heat exchanger 3 to flow into the upstream heat dissipation duct 51 and then through the opening 53 to the motor 4 located in the downstream heat dissipation duct 52. As a result, the low-temperature airflow can efficiently dissipate the heat generated by the motor 4.

[0055] In some optional embodiments, the opening 53 may be an opening provided at the top of the motor housing 12, through which part of the structure of the motor 4 is exposed, wherein at least half of the structure located at the upper portion of the motor 4 is exposed.

[0056] In other optional embodiments, the opening 53 may also be a heat dissipation hole 122 provided on the wall of the motor housing 12 .

[0057] During implementation, the heat dissipation efficiency of the motor 4 can be improved through other means, such as shortening the flow path of the low-temperature airflow. Thus, in some embodiments, at least a portion of the heat dissipation holes 122 can be located on the side of the motor housing 12 facing the heat exchange cavity 1135. This shortens the distance between the heat dissipation holes 122 and the air inlet side of the heat exchanger 3, allowing the low-temperature airflow to quickly flow to the surface of the motor 4, thereby improving the heat dissipation efficiency of the motor 4.

[0058] In order to fix the motor 4, generally, the motor housing 12 includes a motor bracket 123, the motor bracket 123 is connected to the first shell 111, the motor cavity 121 includes a motor slot 1231, the motor slot 1231 is opened at the bottom of the motor bracket 123, and the motor 4 is arranged in the motor slot 1231 and is located below the motor bracket 123.

[0059] To facilitate assembly and disassembly of the motor bracket 123, a detachable connection method can be used between the motor bracket 123 and the first housing 111. For example, the motor bracket 123 and the first housing 111 can be detachably connected via a screw connection structure; or the motor bracket 123 and the first housing 111 can be detachably connected via a snap connection structure; or the motor bracket 123 and the first housing 111 can be detachably connected via a combination of a screw connection structure and a snap connection structure.

[0060] Among them, the screw-type structure can be a threaded fastener such as a screw. By opening coaxial threaded holes on the motor bracket 123 and the first shell 111 respectively, the threaded fasteners can pass through the threaded holes on the motor bracket 123 and the threaded holes on the first shell 111 in turn to detachably connect the motor bracket 123 and the first shell 111 together.

[0061] The snap-fit ​​structure can be formed by a snap-fit ​​and a slot, with a snap-fit ​​provided on one of the motor bracket 123 and the first housing 111 and a slot provided on the other, so that the motor bracket 123 and the first housing 111 can be detachably connected together through the snap-fit ​​and the slot. The connection method between the motor bracket 123 and the first housing 111 is not specifically limited.

[0062] It should be noted that the above-mentioned up and down directions are consistent with the up and down directions in Figures 1, 2, 3, 5 and 6.

[0063] As can be seen from the above, the motor 4 is disposed in the motor slot 1231. Therefore, the motor slot 1231 forms a part of the structure of the motor cavity 121. When it is necessary to connect the motor cavity 121 with the heat dissipation duct 5, a heat dissipation hole needs to be opened on the motor bracket 123, and the heat dissipation hole connects the motor slot 1231 with the heat dissipation duct 5.

[0064] Please refer to Figure 7, which is an enlarged schematic diagram of the partial structure at point B in Figure 5. The heat dissipation holes 122 include first heat dissipation holes 1221, which are formed on the wall of the motor slot 1231 and connect the upstream heat dissipation duct 51 with the downstream heat dissipation duct 52. In this way, the low-temperature airflow generated by the heat exchanger 3 can flow through the first heat dissipation holes 1221 to the surface of the motor 4, dissipating heat from the motor 4.

[0065] Continuing with Figure 8, Figure 8 is a schematic diagram illustrating the structure of the motor housing and motor in the indoor unit according to an embodiment of the present application. As shown in Figure 8, in some optional embodiments, the first heat dissipation holes 1221 can be strip-shaped holes, and the extension direction of the first heat dissipation holes 1221 is consistent with the circumference of the motor 4.

[0066] Since the heat dissipated by the motor 4 during operation is generated by the stator winding, and the circumferential direction of the stator winding is the circumferential direction of the motor 4, the first heat dissipation holes 1221 are configured as strip holes extending along the circumference of the motor 4. This allows the extension direction of the strip holes to be configured to be consistent with the circumferential direction of the stator winding, thereby further facilitating heat dissipation from the motor 4.

[0067] To facilitate description of the circumferential coverage of the first heat dissipation holes 1221 around the motor 4, the circumferential coverage of the first heat dissipation holes 1221 around the motor 4 can be quantified as the projected area of ​​the first heat dissipation holes 1221 on the motor's outer peripheral wall. For example, the first heat dissipation holes 1221 extend along the motor's circumference and cover at least one-quarter of the motor's outer peripheral wall. This allows a greater amount of low-temperature air to quickly flow to the surface of the motor 4, dissipating heat quickly.

[0068] When the heat dissipation area is large, it is difficult to provide only one first heat dissipation hole 1221 on the motor bracket 123. Therefore, in some specific embodiments, multiple first heat dissipation holes 1221 can be provided on the motor bracket 123. The multiple first heat dissipation holes 1221 include multiple groups of heat dissipation holes spaced apart along the circumference of the motor 4, and each heat dissipation hole group includes multiple first heat dissipation holes 1221 spaced apart along the axial direction of the motor 4. This facilitates the provision of the first heat dissipation holes 1221 when the heat dissipation area is large.

[0069] It should be noted that the motor 4 includes a motor body 41 and two end caps 42, and the two end caps 42 are respectively connected to the axial ends of the motor body 41. In order to further improve the heat dissipation efficiency of the motor 4, in some optional embodiments, in any heat dissipation hole group, the first heat dissipation hole 1221 located at the end of the heat dissipation hole group extends from the peripheral wall of the motor body 41 to the end face of the end cap 42, that is, the peripheral wall of the motor body 41, the peripheral wall of the end cap 42, and part of the end face of the end cap 42 can all be exposed through the first heat dissipation hole 1221 located at the end of the heat dissipation hole group. In this way, the low-temperature airflow can flow to the peripheral side and end of the motor 4 at the same time, so that a larger area of ​​the surface of the motor 4 can be in contact with the low-temperature airflow, which can further improve the heat dissipation efficiency of the motor 4.

[0070] The end of the motor 4 can be understood as the end face of the end cover structure that is arranged away from the wind wheel 2, and the extension direction of the end face is consistent with the vertical direction.

[0071] Please continue to refer to Figure 8. In order to improve the overall structural compactness of the indoor unit 10 provided in this embodiment, the above-mentioned motor bracket 123 may include a bracket body 1232, and the motor slot 1231 and the first heat dissipation hole 1221 are both formed on the bracket body 1232; the extension direction of the bracket body 1232 is consistent with the circumference of the motor 4, and the bracket body 1232 can also be connected with a first connecting portion 1233 and a second connecting portion 1234, the first connecting portion 1233 and the second connecting portion 1234 are respectively connected to the two sides of the bracket body 1232, the first connecting portion 1233 can be detachably connected to the first shell 111 by a threaded fastener such as a screw, and the second connecting portion 1234 is a card protrusion, which can be engaged and connected with the first shell 111. The detachable connection between the motor bracket 123 and the first shell 111 is achieved by the connection between the first connecting portion 1233 and the first shell 111 and the connection between the second connecting portion 1234 and the first shell 111.

[0072] Continuing with Figures 9 and 10, Figure 9 is a schematic perspective view of a fourth partial structure of the indoor unit provided in an embodiment of the present application, and Figure 10 is an enlarged schematic view of the partial structure at point C in Figure 9. In this embodiment, to increase the speed at which the low-temperature airflow reaches the first heat dissipation holes 1221, that is, to ensure that the low-temperature airflow preferentially contacts the bracket body 1232, the bracket body 1232 is positioned at a higher position.

[0073] Therefore, the motor bracket 123 further includes a baffle structure 1238, which is connected to the bracket body 1232. The bracket body 1232 protrudes toward the top relative to the baffle structure 1238, so that the top surface of the bracket body 1232 and the top surface of the baffle structure 1238 together form a portion of the duct wall of the upstream heat dissipation duct 51. Therefore, it is not difficult to understand that when the bracket body 1232 protrudes from the baffle structure 1238, the low-temperature airflow can preferentially contact the bracket body 1232, thereby increasing the speed of the low-temperature airflow flowing into the first heat dissipation hole 1221, and then the low-temperature airflow can flow through the first heat dissipation hole 1221 into the downstream heat dissipation duct 52 to dissipate heat from the motor 4.

[0074] It should be noted that when the above-mentioned opening 53 is open, the motor bracket 123 may only include the partition structure 1238, and the opening is formed on the partition structure 1238, and the top surface of the partition structure 1238 forms part of the duct wall of the upstream heat dissipation duct 51.

[0075] When the above-mentioned motor bracket 123 includes a partition structure 1238, the connection method between the partition structure 1238 and the casing 11 will affect the sealing of the heat dissipation duct 5. Therefore, in this embodiment, the side of the partition structure 1238 abuts against the inner wall of the casing 11. Specifically, part of the side of the partition structure 1238 abuts against the side plate 1112, and the other part of the side of the partition structure 1238 abuts against the first shell 111. In this way, the sealing of the upstream heat dissipation duct 51 can be improved, and more low-temperature airflow can flow through the upstream heat dissipation duct 51 to the first heat dissipation hole 1221, and then flow to the downstream heat dissipation duct 52 to dissipate heat for the motor 4, thereby further improving the heat dissipation efficiency of the motor 4.

[0076] As can be seen from the above, the low-temperature airflow preferentially contacts the bracket body 1232. To avoid, to a certain extent, the loss of a small amount of airflow due to contact with the baffle structure 1238 due to the small distance between the top of the bracket body 1232 and the plate surface of the baffle structure 1238, the distance between the top of the bracket body 1232 and the plate surface of the baffle structure 1238 can be limited. Therefore, in a specific implementation of this embodiment, the distance between the top of the bracket body 1232 and the plate surface of the baffle structure 1238 is equal to the radius of the motor body 41. In this way, the distance between the top of the bracket body 1232 and the baffle structure 1238 can be increased, and the airflow rate of the low-temperature airflow flowing through the first heat dissipation hole 1221 to the downstream heat dissipation duct 52 can be increased to dissipate heat from the motor.

[0077] Furthermore, the motor bracket 123 also includes a side panel structure 1235, which is connected to the bracket body 1232, and the first connecting portion 1233 is connected to the side of the side panel structure 1235 close to the heat exchange cavity 1135. The side panel structure 1235 is located between the wind wheel 2 and the motor 4, and the heat exchange air duct 113 and the heat dissipation air duct 5 are located on opposite sides of the side panel structure 1235.

[0078] Specifically, the heat exchange duct 113 and the heat dissipation duct 5 are located on opposite sides of the side panel structure 1235 along its thickness direction, and the heat dissipation duct 5 is enclosed by the first shell 111, the second shell 112, and the side panel structure 1235. That is, part of the sidewall of the heat dissipation duct 5 is formed on the side panel structure 1235. This allows the heat exchange duct 113 and the heat dissipation duct 5 to be relatively independent, allowing the low-temperature airflow to flow directly to the upstream heat dissipation duct 51. Combined with the structural design of the partition structure 1238 and the bracket body 1232, the upper structure of the motor bracket 123 can guide the low-temperature airflow to a certain extent, thereby improving the heat dissipation efficiency of the motor 4.

[0079] To match the extension direction of the heat dissipation duct 5, in this embodiment, the side panel structure 1235 extends from the wind wheel cavity 1133 to the heat exchange cavity 1135, and the side panel structure 1235 covers the wind wheel cavity 1133 in its own extension direction. This improves the sealing performance of the heat dissipation duct 5. While guiding the low-temperature airflow, a larger amount of low-temperature airflow can flow into the upstream heat dissipation duct 51, and then flow through the first heat dissipation holes 1221 into the downstream heat dissipation duct 52, effectively cooling the motor 4.

[0080] Specifically, the peripheral wall surface of the side panel structure 1235 includes a first wall surface 1236 and a second wall surface 1237. The first wall surface 1236 is located near the heat exchange chamber 1135, and the second wall surface 1237 is connected to the first wall surface 1236. The second wall surface 1237 abuts the inner wall of the top shell 1111. In this way, the side panel structure 1235 can effectively fit with the top shell 1111, thereby preventing a gap from forming between the side panel structure 1235 and the top shell 1111 to a certain extent. This can also prevent the airflow in the upstream heat dissipation duct 51 from leaking through the gap, thereby further improving the heat dissipation effect on the motor 4.

[0081] Generally, in order to fix the motor 4 and prevent the motor 4 from slipping, a motor cover 124 is buckled under the motor bracket 123. The motor cover 124 and the motor bracket 123 enclose a motor cavity 121 to fix the motor 4 between the motor bracket 123 and the motor cover 124.

[0082] Please continue to refer to Figure 11, which is an enlarged schematic diagram of the partial structure at point D in Figure 5. After the low-temperature airflow flows into the motor cavity 121 through the first heat dissipation hole 1221, it needs to flow out of the motor cavity 121. Therefore, it is necessary to open heat dissipation holes on the motor cover 124. Therefore, the heat dissipation holes 122 should also include second heat dissipation holes 1222, which are opened on the motor cover 124. In this way, after the low-temperature airflow flows into the motor cavity 121 through the first heat dissipation hole 1221 and cools the motor 4, it can then flow out of the motor cavity 121 through the second heat dissipation hole 1222.

[0083] To increase the speed of the airflow after cooling the motor 4, the second heat dissipation holes 1222 can be provided in a plurality, and the plurality of second heat dissipation holes 1222 can be arranged in rows and columns. In this way, the airflow after cooling the motor 4 can flow out quickly through the second heat dissipation holes 1222, which can further improve the heat dissipation effect of the motor 4.

[0084] In some optional embodiments, to facilitate the formation of the second heat dissipation holes 1222, the second heat dissipation holes 1222 may also be strip-shaped holes, and the extending direction of the heat dissipation holes 1222 is consistent with the length direction of the indoor unit 10. In some other embodiments, the heat dissipation holes 1222 may also have other shapes, and the shape of the heat dissipation holes 1222 is not specifically limited herein.

[0085] Since the second heat dissipation hole 1222 forms the outlet end of the heat dissipation duct 5, the second heat dissipation hole 1222 should be located adjacent to the return air port 1131. In this way, the airflow from the second heat dissipation hole 1222 can quickly flow through the return air port 1131 into the wind wheel cavity 1133 for air replenishment, thereby improving the cooling efficiency of the indoor unit 10 provided in this embodiment.

[0086] It should be noted that to facilitate installation and removal of the motor 4, the motor cover 124 and the motor bracket 123 can be connected in a detachable manner. For example, the motor cover 124 and the motor bracket 123 can be connected by a threaded connection, a snap-fit ​​connection, or other fasteners. The connection method between the motor cover 124 and the motor bracket 123 is not specifically limited.

[0087] It should be noted that, in some other embodiments, the side panel structure 1235 can be formed by the motor bracket 123 and the motor cover 124 , that is, the upper structure of the side panel structure 1235 can be formed by the motor bracket 123 , and the lower structure of the side panel structure 1235 can be formed by the motor cover 124 .

[0088] The indoor unit 10 provided in this embodiment requires the participation of other modules or structures for normal operation. Therefore, the indoor unit 10 provided in this embodiment should also include an electrical control box 6. The bottom of the second housing 112 forms a recessed cavity 1121. The electrical control box 6 is installed in the recessed cavity 1121 and is located between the impeller 2 and the heat exchanger 3. The electrical control box 6 and the second housing 112 can be connected in a detachable manner, such as a threaded connection or a snap-on connection. The connection method between the electrical control box 6 and the second housing 112 is not specifically limited.

[0089] That is, in this embodiment, the electric control box 6 is disposed facing the inspection opening on the ceiling below the indoor unit 10. Thus, when the grille on the inspection opening is opened, the electric control box 6 can be observed, making it easier to inspect and maintain the electric control box 6. Furthermore, the airflow entering through the inspection opening can dissipate heat from the electric control box 6, thereby improving the performance of the electric control box 6 and, consequently, the indoor unit 10 provided by this embodiment.

[0090] Specifically, the electric control box 6 may include a cover 61 and a body 62. The cover 61 is positioned toward the inspection port, and the body 62 is positioned between the cover 61 and the bottom wall of the cavity 1121. The cover 61 and the body 62 are detachably connected, and the body 62 is detachably connected to the second housing 112. The detachable connection between the cover 61 and the body 62 may be a combination of a threaded connection and a snap-on connection. The connection method between the cover 61 and the body 62 is not specifically limited.

[0091] In some specific embodiments, in order to increase the flow rate of the low-temperature airflow to the electric control box 6, the opening of the cavity 1121 can be configured so that the dimension in the width direction of the indoor unit 10 is larger than the dimension of the bottom of the cavity 1121 in the width direction of the indoor unit 10. In this way, the electric control box 6 can be effectively dissipated.

[0092] It should be noted that the width direction of the indoor unit 10 is consistent with the yy-axis direction in Figures 1 to 6.

[0093] Furthermore, to prevent the wind rotor 2 from causing harm to the human body, a protective grille 7 can be provided on the outside of the wind rotor 2. The protective grille 7 is connected between the first housing 111 and the second housing 112, and is located between the wind rotor 2 and the electrical control box 6. The provision of the protective grille 7 not only prevents harm to the human body, but also protects the wind rotor 2, thereby improving the durability of the normal operation of the wind rotor 2.

[0094] The protective grille 7 and the first housing 111 can be connected by a snap-fit ​​connection, and the protective grille 7 and the second housing 112 can also be connected by a snap-fit ​​connection. The connection method between the protective grille 7 and the first housing 111 and the connection method between the protective grille 7 and the second housing 112 are not specifically limited.

[0095] Furthermore, in this embodiment, the side of the bottom wall of the cavity 1121 near the heat exchange cavity 1135 is lower than the side of the bottom wall of the cavity 1121 near the impeller cavity 1133. Therefore, when the size of the cavity opening of the cavity 1121 in the width direction of the indoor unit 10 is larger than the size of the cavity bottom of the cavity 1121 in the width direction of the indoor unit 10, the maintenance space for the electric control box 6 is larger. This can, to a certain extent, prevent the protective grille 7 from interfering with the maintenance of the electric control box 6, thereby further improving the convenience of repairing the electric control box 6.

[0096] The indoor unit 10 provided in this embodiment may also include other components, such as a pipe component connected to the heat exchanger 3. Here, other components in the indoor unit 10 provided in this embodiment will not be described in detail.

[0097] This embodiment further provides a HVAC device, comprising the indoor unit 10 and the outdoor unit in the above embodiment. It should be noted that the structure of the indoor unit 10 has been described in detail in the above embodiment and will not be repeated here.

[0098] Other structures included in the HVAC equipment provided in this embodiment, such as the outdoor unit, will not be introduced in detail here.

[0099] In the description of this application, it should be understood that the terms "first", "second", etc. are used for descriptive purposes only and should not be understood as indicating or implying relative importance. For those of ordinary skill in the art, the specific meanings of the above terms in this application can be understood according to the specific circumstances. In addition, in the description of this application, unless otherwise specified, "multiple" refers to at least two, for example, two, three, four, etc. "and / or" describes the association relationship of associated objects, indicating that three relationships may exist. For example, A and / or B can represent: A exists alone, A and B exist at the same time, and B exists alone. The character " / " generally indicates that the previous and subsequent associated objects are in an "or" relationship.

[0100] The above disclosure is only a preferred embodiment of the present application, and certainly cannot be used to limit the scope of rights of the present application. Therefore, equivalent changes made according to the claims of the present application are still within the scope covered by the present application.

Claims

1. An indoor unit, wherein, Comprising: A housing, inside which there is formed a heat exchange air duct and a heat dissipation air duct communicating with the heat exchange air duct; An impeller, installed in the housing and located inside the heat exchange air duct; And A motor, installed in the housing and located inside the heat dissipation air duct, and the motor is in transmission connection with the impeller.

2. The indoor unit according to claim 1, wherein, The housing includes a casing and a motor housing connected together; the motor housing is located inside the heat dissipation air duct and forms a motor cavity, and the motor is arranged in the motor cavity; The heat dissipation air duct includes an upstream heat dissipation air duct and a downstream heat dissipation air duct, the motor is located inside the downstream heat dissipation air duct, and the upstream heat dissipation air duct and the downstream heat dissipation air duct are communicated through an opening.

3. The indoor unit according to claim 2, wherein, The motor housing includes a motor bracket, and the motor bracket includes a partition structure; The partition structure forms part of the air duct wall of the upstream heat dissipation air duct.

4. The indoor unit according to claim 3, wherein, The side surface of the partition structure abuts against the casing.

5. The indoor unit according to claim 3, wherein, The opening is an open mouth provided on the partition structure, and part of the structure of the motor is exposed through the open mouth.

6. The indoor unit according to claim 3, wherein, The opening further includes heat dissipation holes provided on the wall surface of the motor housing.

7. The indoor unit according to claim 6, wherein, The motor bracket further includes a bracket body connected to the partition structure, the extending direction of the bracket body is the same as the circumferential direction of the motor, and the bracket body protrudes upward relative to the partition structure; The motor cavity includes a motor slot opened on the bracket body, and the motor is arranged in the motor slot; The heat dissipation holes include first heat dissipation holes, and the first heat dissipation holes are opened on the wall of the motor slot; Wherein, the top surface of the bracket body and the top surface of the partition structure jointly form part of the air duct wall of the upstream heat dissipation air duct.

8. The indoor unit according to claim 7, wherein, The motor includes a motor main body and end covers connected to both axial ends of the motor main body; The distance between the top of the bracket body and the plate surface of the partition structure is equal to the radius of the motor main body.

9. The indoor unit according to claim 7, wherein, The first heat dissipation holes extend along the circumferential direction of the motor and at least cover a quarter area of the outer peripheral wall of the motor.

10. The indoor unit according to claim 8, wherein, The first heat dissipation holes are multiple; The multiple first heat dissipation holes include multiple groups of heat dissipation hole groups arranged at intervals along the circumferential direction of the motor, and each heat dissipation hole group includes at least one of the first heat dissipation holes arranged at intervals along the axial direction of the motor; In any one of the heat dissipation hole groups, the projection area of the first heat dissipation hole at the end of the heat dissipation hole group on the motor extends from the circumferential wall of the motor main body to the end face of the end cover.

11. The indoor unit according to claim 7, wherein, The motor bracket further includes a side plate structure connected to the bracket body, and the side plate structure is located between the motor and the impeller; The heat exchange air duct and the heat dissipation air duct are located on both sides of the side plate structure, and the heat dissipation air duct is formed by enclosing the casing and the side plate structure.

12. The indoor unit according to claim 11, wherein, It further includes a heat exchanger; The heat exchange air duct includes an impeller cavity and a heat exchange cavity, the impeller is arranged in the impeller cavity, and the heat exchanger is arranged in the heat exchange cavity; The side plate structure extends in the direction from the impeller cavity to the heat exchange cavity, and the side plate structure covers the impeller cavity in its own extending direction.

13. The indoor unit according to claim 6, wherein, It further includes a heat exchanger, the heat exchange air duct includes a heat exchange cavity, and the heat exchanger is arranged in the heat exchange cavity; At least a part of the heat dissipation holes is located on the side of the motor housing facing the heat exchange chamber.

14. The indoor unit according to claim 13, wherein, The heat exchange air duct further includes an air outlet communicating with the heat exchange chamber; The inlet end of the heat dissipation air duct is located on the side of the heat exchanger facing away from the air outlet.

15. The indoor unit according to claim 13, wherein, The heat exchange air duct further includes a wind wheel chamber communicating with the heat exchange chamber, and the wind wheel is located in the wind wheel chamber; The heat dissipation air duct is located on one side of the heat exchange air duct and extends in the direction from the heat exchange chamber to the wind wheel chamber.

16. The indoor unit according to claim 15, wherein, The heat exchange air duct further includes a return air port communicating with the wind wheel chamber; The outlet end of the heat dissipation air duct is disposed adjacent to the return air port.

17. The indoor unit according to claim 6, wherein, The motor housing further includes a motor cover, the motor cover is buckled below the motor bracket, and a motor chamber is formed by enclosing between the motor cover and the motor bracket; The heat dissipation holes further include second heat dissipation holes, and the second heat dissipation holes are formed in the motor cover.

18. The indoor unit according to claim 17, wherein, There are a plurality of the second heat dissipation holes, and the plurality of second heat dissipation holes are arranged in rows and columns.

19. The indoor unit according to any one of claims 2 to 10, 12 to 18, wherein, The housing includes a first housing and a second housing connected to each other; The motor housing is connected to the first housing, and the first housing, the second housing and the motor housing cooperate to define the heat exchange air duct and the heat dissipation air duct.

20. A heating, ventilation, and air conditioning (HVAC) device, wherein, An indoor unit according to any one of claims 1 to 19.

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