WO2025232329A1 - Indoor unit, and heating, ventilation and air-conditioning device - Google Patents

Abstract

Provided in the present application are an indoor unit, and a heating, ventilation and air-conditioning device. The indoor unit provided in the present application comprises a housing, a wind wheel, a heat exchanger, a pipeline module, a drip pan and a sealing cover, wherein the housing is provided with a return air vent and an air outlet; the wind wheel and the heat exchanger are arranged in the housing and are spaced apart between the return air vent and the air outlet; the pipeline module is connected to the heat exchanger; the drip pan is arranged in the housing and below the heat exchanger; and the sealing cover is arranged in the housing and on one side of the heat exchanger, is located below part of the structure of the pipeline module, and can direct, into the drip pan, condensed water generated by the part of the structure of the pipeline module.

Description

Indoor units and HVAC equipment

This application claims priority to Chinese Patent Application No. 202421013319.3, filed on May 10, 2024, entitled "Indoor Unit and HVAC Equipment", the entire contents of which are incorporated herein by reference.

Technical Field

This application relates to the field of air conditioning technology, and more particularly to an indoor unit and a heating, ventilation and air conditioning device using the indoor unit.

Background Technology

A ducted air conditioner is a type of indoor unit. An indoor unit typically includes a casing, heat exchanger, expansion valve, refrigerant piping assembly, water pump, and drip tray. The heat exchanger is housed inside the casing. The expansion valve is connected to the heat exchanger via the piping assembly. Both the expansion valve and the heat exchanger are connected to the refrigerant piping assembly. The drip tray is located below the heat exchanger to collect the condensate flowing down from it. The water pump is used to extract the condensate from the drip tray.

During the operation of the indoor unit, condensate may flow downwards into the indoor environment, which may affect the normal use of the indoor unit.

Summary of the Invention

This application provides an indoor unit and HVAC equipment to solve the problem in related technologies where condensate water flows into the indoor environment and affects the normal use of the indoor unit.

On one hand, this application provides an indoor unit, including a casing, a fan, a heat exchanger, a piping module, a drip tray, and a sealing cover; the casing has a return air inlet and an air outlet; the fan and the heat exchanger are disposed inside the casing and spaced apart between the return air inlet and the air outlet; the piping module is connected to the heat exchanger; the drip tray is disposed inside the casing and located below the heat exchanger; the sealing cover is disposed inside the casing and located on one side of the heat exchanger, and the sealing cover is located below a portion of the piping module structure, and can guide condensate generated by a portion of the piping module structure into the drip tray.

As an optional implementation, the piping module includes a throttling valve and a connecting pipe assembly, wherein the throttling valve is connected to the heat exchanger via the connecting pipe assembly; wherein, the sealing cap is located below the throttling valve and can guide the condensate generated by the throttling valve into the drip tray.

As an alternative implementation, a guide groove is formed on the end face of the sealing cap facing the throttle valve, and the guide groove is configured to guide the condensate generated by the throttle valve into the water receiving tray.

As an alternative implementation, the bottom wall of the guide channel extends downward at an angle in the direction close to the water receiving tray.

As an alternative implementation, a mounting cavity is formed at the bottom of the housing, and the bottom of the mounting cavity is an opening; the sealing cover is exposed through the opening.

As an optional implementation, the indoor unit provided in this application also includes a motor assembly, which includes a motor and a motor bracket for mounting the motor. The motor is driven and connected to the fan wheel, and the motor bracket is connected to the housing. A sealing cover is detachably connected between the motor bracket and the water tray.

As an optional implementation, the water receiving tray includes a main body and an edge portion connected together. The main body is located below the heat exchanger, and the edge portion is located on one side of the heat exchanger. The opposite sides of the sealing cover are detachably connected to the edge portion and the motor bracket, respectively.

As an alternative implementation, both the motor bracket and the edge portion are engaged with the sealing cover.

As an alternative implementation, the sealing cap includes a cap body and a handle portion connected together; the cap body is engaged with the edge portion, the handle portion is engaged with the motor bracket, and the free end of the handle portion extends downward.

As an optional implementation, one of the cover body and the edge portion is provided with a first snap-fit portion, and the other is provided with a snap-fit groove; the first snap-fit portion snaps into the snap-fit groove and engages with the snap-fit groove to engage and connect the cover body and the edge portion.

As an optional implementation, one of the handle and the motor bracket is provided with a second snap-fit part, and the other is provided with a snap-fit hole; the second snap-fit part snaps into the snap-fit hole and engages with the snap-fit hole to engage and connect the handle and the motor bracket.

As an optional implementation, a limiting structure is provided between the sealing cover and the motor bracket. The limiting structure is configured to restrict the relative position between the sealing cover and the motor bracket in the length direction and the width direction of the indoor unit.

As an optional implementation, the limiting structure includes a limiting protrusion disposed on one of the sealing cover and the motor bracket; the other of the sealing cover and the motor bracket is provided with a limiting hole for the limiting protrusion to be inserted.

As an alternative implementation, the housing includes two side plates arranged opposite each other along the length of the indoor unit; the two opposite ends of the sealing cover along the length of the indoor unit respectively abut against one side plate and the motor bracket.

As an alternative implementation, the projection of the throttle valve onto the horizontal plane falls within the projection area of the sealing cover onto the horizontal plane.

As an alternative implementation, the sealing cover has a through hole for the refrigerant pipe assembly of the indoor unit to pass through, and the shape of the through hole is adapted to the contour shape of the refrigerant pipe assembly.

As an optional implementation, the indoor unit provided in this application also includes a water pump assembly, which is disposed at the bottom of the sealing cover and connected to the bottom of the water receiving tray.

On the other hand, this application provides a heating and ventilation device, including the aforementioned indoor unit.

In the indoor unit and HVAC equipment provided in this application embodiment, by setting a sealing cover, condensate generated by part of the pipe module structure can be collected and guided into a drip tray, so as to a certain extent, the condensate generated by the pipe module can be prevented from flowing into the indoor environment. The indoor unit provided in this application can maintain normal use for a long time, thereby improving the performance of the indoor unit provided in this application.

Attached Figure Description

Figure 1 is a three-dimensional structural diagram of the indoor unit provided in an embodiment of this application;

Figure 2 is a three-dimensional structural diagram of Figure 1 from another perspective;

Figure 3 is a schematic diagram of the first partial structure of the indoor unit provided in the embodiment of this application;

Figure 4 is a schematic diagram of the second partial structure of the indoor unit provided in the embodiment of this application;

Figure 5 is a schematic diagram of the third partial structure of the indoor unit provided in the embodiment of this application;

Figure 6 is a magnified schematic diagram of the local structure at point A in Figure 5;

Figure 7 is a three-dimensional structural diagram of the sealing cover in the indoor unit provided in the embodiment of this application;

Figure 8 is a schematic diagram of the connection structure between the sealing cover, motor bracket, and water tray in the indoor unit provided in the embodiment of this application;

Figure 9 is a magnified schematic diagram of the local structure at point B in Figure 8;

Figure 10 is a magnified schematic diagram of the local structure at point C in Figure 8;

Figure 11 is a three-dimensional structural diagram of the sealing cover in the indoor unit provided in the embodiment of this application from another perspective;

Figure 12 is a schematic diagram of the fourth partial structure of the indoor unit provided in the embodiment of this application.

Explanation of reference numerals in the attached figures:
1. Casing; 2. Fan wheel; 3. Heat exchanger; 4. Water receiving tray; 5. Throttling valve; 6. Pipe assembly; 7. Sealing cover; 8. Water pump assembly;
9. Refrigerant piping assembly;
11. Air duct; 12. Mounting cavity; 13. Outer shell; 14. Motor bracket; 41. Main body; 42. Edge; 71. Through hole; 72. Guide groove; 73. Cover body; 74. Handle; 75. Extension; 76. Reinforcing rib; 77. Sealing part; 91. Liquid pipe; 92. Gas pipe; 10. Electrical control module; 20. First snap-fit part; 30. Slot; 40. Second snap-fit part; 50. Snap-fit hole; 60. Limiting structure; 70. Piping module;
100. Indoor unit; 111. Return air vent; 112. Air outlet; 113. Fan impeller cavity; 114. Diffuser cavity; 115. Heat exchange cavity; 131. Side panel;
121. Opening; 721. First groove segment; 722. Second groove segment; 723. Connecting surface; 741. First lifting means; 742. Second lifting means; 771. Cavity; 401. Recessed cavity; 601. Limiting protrusion; 602. Limiting hole.

Detailed Implementation

An indoor unit typically includes a casing, heat exchanger, expansion valve, refrigerant piping assembly, water pump assembly, and drip tray. The heat exchanger is housed within the casing. The expansion valve is connected to the heat exchanger via a piping assembly. The liquid lines of the refrigerant piping assembly are connected to and communicate with the expansion valve. The gas lines of the refrigerant piping assembly are connected to and communicate with the heat exchanger. The drip tray is located below the heat exchanger to collect the condensate flowing down from it. The water pump assembly is used to extract the condensate from the drip tray. The expansion valve, refrigerant piping assembly, and water pump assembly are all concentrated in one area.

During the operation of the indoor unit, liquid refrigerant enters the expansion valve, causing condensation to form on its surface. This condensation may flow downwards into the indoor environment, affecting the normal operation of the indoor unit.

Therefore, this application provides an indoor unit and HVAC equipment that can solve the problem in the above-mentioned related technologies where condensate flows downward into the indoor environment and affects the normal use of the indoor unit.

The embodiments of this application will be described in detail below with reference to the accompanying drawings and specific implementation details.

Please refer to Figures 1 to 3. Figure 1 is a three-dimensional structural diagram of the indoor unit provided in the embodiment of this application. Figure 2 is a three-dimensional structural diagram of Figure 1 from another perspective. Figure 3 is a structural diagram of the first partial structure of the indoor unit provided in the embodiment of this application. As shown in the figures, this embodiment provides an indoor unit 100, including a housing 1. An air duct 11 is formed inside the housing 1. A return air inlet 111 and an air outlet 112 are formed at both ends of the air duct 11. A fan wheel cavity 113, a diffuser cavity 114, and a heat exchange cavity 115 are connected sequentially between the return air inlet 111 and the air outlet 112. A fan wheel 2 is disposed in the fan wheel cavity 113, and a heat exchanger 3 is disposed in the heat exchange cavity 115.

During the operation of the indoor unit 100, under the rotation of the fan wheel 2, the air in the indoor environment enters the fan wheel cavity 113 through the return air inlet 111 and is diffused through the diffuser cavity 114 before entering the heat exchange cavity 115. After the heat exchanger 3 exchanges heat with the air, it is discharged into the indoor environment from the air outlet 112 to achieve the corresponding cooling or heating function.

Typically, since heat exchanger 3 produces condensate during operation, a water collection tray 4 is installed below heat exchanger 3 to collect the condensate. By installing water collection tray 4, the condensate produced by heat exchanger 3 during operation can be collected.

Please refer to Figure 4, which is a schematic diagram of the second partial structure of the indoor unit provided in this embodiment. It is understood that during the operation of the indoor unit 100, the liquid refrigerant needs to be converted into gaseous refrigerant, requiring a corresponding piping module 70. Generally, to regulate the flow rate of the liquid refrigerant, the piping module 70 includes a throttle valve 5 and a connecting pipe assembly 6. The throttle valve 5 is connected to the heat exchanger 3 via the connecting pipe assembly 6. The throttle valve 5 is an electronic expansion valve.

As described above, during the use of the indoor unit 100, the expansion valve 5 will generate condensate. To prevent this condensate from flowing downwards into the indoor environment, in this embodiment, a sealing cover 7 is provided inside the casing 1. The sealing cover 7 is located on one side of the heat exchanger 3 and below the expansion valve 5. The sealing cover 7 can guide the condensate generated by the expansion valve 5 into the drip tray 4. Thus, by providing the sealing cover 7, the condensate generated by the expansion valve 5 can be collected, thereby preventing it from flowing into the indoor environment. Therefore, the indoor unit 100 provided in this embodiment can maintain normal operation for a longer period, improving its performance.

It should be noted that the aforementioned sealing cover 7 not only guides the condensate generated by the throttling valve 5 into the water receiving pan 4, but also isolates the heat exchanger 3 from the external environment.

It is easy to understand that the condensate stored in the drip tray 4 needs to be pumped out. Therefore, the indoor unit 100 provided in this embodiment should also include a water pump assembly 8, which is located at the bottom of the sealing cover 7 and connected to the bottom of the drip tray 4. In this way, by setting the water pump assembly 8, the condensate in the drip tray 4 can be pumped out, thereby improving the water collection performance of the drip tray 4.

Referring to Figures 5 and 6, Figure 5 is a structural schematic diagram of the third partial structure of the indoor unit provided in this embodiment, and Figure 6 is an enlarged schematic diagram of the partial structure at point A in Figure 5. Since the throttle valve 5 is located above the sealing cover 7, and the refrigerant pipe assembly 9 needs to connect the heat exchanger 3 to the outdoor unit, a through hole 71 needs to be opened on the sealing cover 7. The through hole 71 allows the refrigerant pipe assembly 9 to pass through, and its shape matches the contour of the refrigerant pipe assembly 9. This enables effective conversion between liquid and gaseous refrigerant. Furthermore, the matching shape of the through hole 71 with the contour of the refrigerant pipe assembly 9 improves the sealing performance between the sealing cover 7 and the refrigerant pipe assembly 9, and to a certain extent prevents condensate from seeping out between the hole wall of the through hole 71 and the refrigerant pipe assembly 9.

Specifically, the refrigerant pipe assembly 9 includes a liquid pipe 91 and a gas pipe 92. The liquid pipe 91 is configured to transmit liquid refrigerant, and the gas pipe 92 is configured to transmit gaseous refrigerant. One end of the liquid pipe 91 is connected to the outdoor unit, and the other end of the liquid pipe 91 is connected to the throttle valve 5. One end of the gas pipe 92 is connected to the heat exchanger 3, and the other end of the gas pipe 92 is connected to the outdoor unit.

In this embodiment, the through hole 71 is presented as a notch. This makes it more convenient to assemble the sealing cover 7.

Please refer to Figure 7, which is a three-dimensional structural diagram of the sealing cover in the indoor unit provided in the embodiment of this application. In order to guide the condensate on the sealing cover 7 into the drip tray 4, in some optional embodiments, a guide groove 72 is formed on the end face of the sealing cover 7 facing the throttle valve 5. The guide groove 72 is configured to guide the condensate generated by the throttle valve 5 into the drip tray 4.

In order to increase the flow rate of condensate into the drip tray 4 and to increase the speed at which the condensate flows into the drip tray 4, in this embodiment, the bottom wall of the guide channel 72 extends downward at an angle close to the drip tray 4. In this way, under the action of gravity, more condensate collected by the sealing cover 7 can flow into the drip tray 4 more quickly.

Specifically, in this embodiment, the guide channel 72 includes a first channel segment 721 and a second channel segment 722, which are interconnected. The depth of the first channel segment 721 is less than the depth of the second channel segment 722. Thus, a connecting surface 723 is formed at the junction of the first channel segment 721 and the second channel segment 722. The connecting surface 723 extends downwards at an angle near the water receiving tray 4, and the bottom wall of the second channel segment 722 extends downwards at an angle and communicates with the interior of the water receiving tray 4. Therefore, under the guiding effect of the guide channel 72, the condensate collected on the sealing cover 7 can flow into the water receiving tray 4 in greater quantity and faster, and be pumped out by the water pump assembly 8, further preventing the condensate from flowing downwards into the indoor environment.

It should be noted that the throttle valve 5 may malfunction during the operation of the indoor unit 100, in which case it needs to be removed for inspection or replacement. Exposing the sealing cover 7 to the environment improves the ease of disassembly of the throttle valve 5. Therefore, referring to Figures 2 to 4, in some optional embodiments, a mounting cavity 12 is formed at the bottom of the housing 1, with an opening 121 at the bottom of the mounting cavity 12; the sealing cover 7 is exposed through the opening 121. Thus, when the grille located at the return air vent 111 is removed, the sealing cover 7 can be observed. After removing the water pump assembly 8, refrigerant pipe assembly 9, and sealing cover 7, the throttle valve 5 can be disassembled for inspection.

Specifically, the aforementioned mounting cavity 12 is located between the impeller 2 and the heat exchanger 3, that is, the mounting cavity 12 is located below the diffuser cavity 114, and the mounting cavity 12 and the diffuser cavity 114 are separated by the housing 1.

In some embodiments, to improve the structural compactness of the indoor unit 100, other modules or components, such as the electronic control module 10, may be installed in the mounting cavity 12. No specific limitations are placed on the other modules or components installed in the mounting cavity 12.

Furthermore, the indoor unit 100 provided in this embodiment also includes a motor assembly, which includes a motor (not shown in the figure) and a motor bracket 14. The motor is mounted on the motor bracket 14 and is connected to the fan wheel 2 via a transmission connection. The housing 1 includes an outer shell 13, and the motor bracket 14 is connected to the outer shell 13. The sealing cover 7 is detachably connected between the motor bracket 14 and the water tray 4. In this way, when the throttle valve 5 is being inspected, the sealing cover 7 can be easily removed to improve the inspection efficiency of the throttle valve 5, and the indoor unit 100 provided in this embodiment can quickly enter a normal working state.

Please refer to Figures 8 to 10. Figure 8 is a schematic diagram of the connection structure between the sealing cover, motor bracket, and water tray in the indoor unit provided in this embodiment of the application. Figure 9 is a partial enlarged schematic diagram of the structure at point B in Figure 8, and Figure 10 is a partial enlarged schematic diagram of the structure at point C in Figure 8. Specifically, the water tray 4 includes a main body 41 and an edge 42 connected together. The main body 41 is located below the heat exchanger 3, and the edge 42 is located on one side of the heat exchanger 3. The opposite sides of the sealing cover 7 are detachably connected to the edge 42 and the motor bracket 14, respectively. The main body 41 and the edge 42 are integrally formed, and the edge 42 is located on the side of the main body 41 closer to the impeller 2. This satisfies the installation position of the sealing cover 7.

Generally, the motor bracket 14, the water tray 4, and the sealing cover 7 can all be made of plastic. The connection between these plastic components can be via fasteners or snap-fit connections. It's easy to understand that snap-fit connections are more convenient for disassembly, eliminating the need for third-party tools. Therefore, in this embodiment, both the motor bracket 14 and the edge portion 42 are snap-fitted to the sealing cover 7. This allows for quick installation and removal of both the motor bracket 14 and the sealing cover 7, as well as quick installation and removal of both the edge portion 42 and the sealing cover 7.

Referring to Figure 11, which is a three-dimensional structural diagram of the sealing cover in the indoor unit provided in this embodiment of the application from another perspective. As shown in the figure, in order to achieve the engaging connection between the sealing cover 7 and the edge portion 42, and the engaging connection between the sealing cover 7 and the motor bracket 14, in some optional embodiments, the sealing cover 7 includes a cover body 73 and a handle portion 74 connected together; the cover body 73 engages with the edge portion 42, and the through hole 71 and the guide groove 72 are both formed on the cover body 73; the handle portion 74 engages with the motor bracket 14, and the free end of the handle portion 74 extends downward. In this way, not only can the engaging connection between the sealing cover 7 and the edge portion 42, and the engaging connection between the sealing cover 7 and the motor bracket 14 be achieved, but also, through the provision of the handle portion 74, the sealing cover 7 can be easily grasped when disassembling, thereby further improving the convenience of maintenance of the throttle valve 5.

Furthermore, one of the cover body 73 and the edge portion 42 is provided with a first snap-fit portion 20, and the other is provided with a snap-fit groove 30; the first snap-fit portion 20 snaps into the snap-fit groove 30 and engages with the snap-fit groove 30 to engage and connect the cover body 73 and the edge portion 42.

In a specific embodiment of this example, the edge portion 42 protrudes towards the heat exchanger 3 relative to the main body portion 41, forming the aforementioned first engaging portion 20 on the edge portion 42. In some other embodiments, the first engaging portion 20 may also be formed on the edge portion 42. Here, the method of forming the first engaging portion 20 is not limited. Correspondingly, a groove 30 is formed on the cover body 73 of the sealing cover 7, and the depth direction of the groove 30 is consistent with the width direction of the indoor unit 100.

To facilitate the formation of the aforementioned slot 30, an extension 75 can be provided on the side of the cover body 73 near the water tray 4. The slot 30 is formed on the extension 75 and extends through the extension 75 in the length direction of the indoor unit 100. It is understood that the size of the extension 75 is smaller than the size of the cover body 73, and it is easier to form the slot 30 on the extension 75 than on the cover body 73.

It should be noted that the length direction of the indoor unit 100 is consistent with the x-x axis direction in Figures 1, 2 and 5, and the width direction of the indoor unit 100 is consistent with the y-y axis direction in Figures 1 to 5.

In some embodiments, to improve the reliability of the connection between the sealing cap 7 and the water receiving tray 4, the aforementioned extension 75 can be provided in multiple forms. For example, there can be two extensions 75, with a slot 30 formed on each extension 75.

In this embodiment, the edge portion 42 is a single integral structure. Of course, in other embodiments, there may be multiple edge portions 42, with one edge portion 42 corresponding to one slot 30. No specific limitations are imposed here.

It is easy to understand that when connecting the sealing cap 7 and the water receiving tray 4, if the opening size of the slot 30 is larger than the bottom size of the slot 30, then the engagement between the slot 30 and the edge portion 42 is easier. In other words, when the opening size of the slot 30 is larger, the deformation of the extension portion 75 will increase. Therefore, in the specific embodiment of this example, the free end of the lower sidewall of the slot 30 extends downward at an angle. This increases the opening size of the slot 30, making it easier to engage the sealing cap 7 and the water receiving tray 4.

Similarly, for the connection between the sealing cover 7 and the motor bracket 14, one of the handle 74 and the motor bracket 14 is provided with a second snap-fit part 40, and the other is provided with a snap-fit hole 50; the second snap-fit part 40 is snapped into the snap-fit hole 50 and engaged with the snap-fit hole 50 to engage and connect the handle 74 and the motor bracket 14.

Specifically, the second latching part 40 is provided on the motor bracket 14, the latching hole 50 is provided on the handle part 74, and the axial direction of the latching hole 50 is consistent with the width direction of the indoor unit 100.

In this embodiment, the handle 74 includes a first lifting means 741 and a second lifting means 742. The first lifting means 741 is connected to the cover body 73 and extends upward, while the second lifting means 742 is connected to the first lifting means 7414 and extends downward. A locking hole 50 is formed on the second lifting means 742.

To facilitate the forming of the handle portion 74, the connection between the first lifting means 741 and the second lifting means 742, as well as the bottom of the second lifting means 742, are both curved.

It should be noted that the structural design of the handle 74 reduces its structural strength at the connection between the first lifting means 741 and the second lifting means 742, as well as at the bottom of the second lifting means 742. Therefore, to improve the structural strength of the handle 74 and enhance the reliability of the connection between the sealing cover 7 and the motor bracket 14, a reinforcing rib 76 can be provided on the handle 74. The reinforcing rib 76 can be located at the connection between the first lifting means 741 and the second lifting means 742 and/or at the bottom of the second lifting means 742.

When connecting the sealing cover 7 to the motor bracket 14, increasing the deformation of either the motor bracket 14 or the sealing cover 7 can improve the assembly efficiency between them. Therefore, referring to Figure 10, in some optional embodiments, a cavity 401 can be formed on the second snap-fit portion 40, and the depth direction of the cavity 401 can be aligned with the axial direction of the snap hole 50. This increases the deformation of the second snap-fit portion 40, thereby improving the assembly efficiency between the sealing cover 7 and the motor bracket 14.

It is understandable that when assembling the sealing cover 7 and the motor bracket 14, determining their relative positions can further improve assembly efficiency. Therefore, in some optional embodiments, a limiting structure 60 can be provided between the sealing cover 7 and the motor bracket 14. This limiting structure 60 restricts the relative positions of the sealing cover 7 and the motor bracket 14 along both the length and width directions of the indoor unit 100. Thus, by using the limiting structure 60, the relative positions of the sealing cover 7 and the motor bracket 14 can be determined before they are engaged, further improving assembly efficiency.

Specifically, as shown in Figure 10, the limiting structure 60 includes a limiting protrusion 601, which is disposed on one of the sealing cover 7 and the motor bracket 14; the other of the sealing cover 7 and the motor bracket 14 is provided with a limiting hole 602, which allows the limiting protrusion 601 to be inserted.

Specifically, the limiting protrusion 601 is provided on the motor bracket 14, and the free end of the limiting protrusion 601 extends downward, while the limiting hole 602 is opened on the cover body 73 and penetrates the cover body 73.

Since the structural strength is relatively low at the location where the limiting hole 602 is made, in some embodiments, the thickness of the cover body 73 at the location where the limiting hole 602 is made is greater than the thickness at other locations of the cover body 73. This can, to a certain extent, prevent the opening of the limiting hole 602 from reducing the structural strength of the cover body 73, thereby extending the service life of the sealing cover 7.

As described above, when the throttle valve 5 fails, the sealing cover 7 needs to be removed for inspection. Therefore, removing the sealing cover 7 and exposing the throttle valve 5 completely improves the efficiency of inspection. Accordingly, as an optional implementation, the projection of the throttle valve 5 onto the horizontal plane can fall within the projection area of the sealing cover 7 onto the horizontal plane. This way, after removing the sealing cover 7, the throttle valve 5 can be completely exposed, allowing for easy removal and inspection.

Further, please refer to Figure 12, which is a schematic diagram of the fourth partial structure of the indoor unit provided in the embodiment of this application. As shown in the figure, the casing 1 includes two side plates 131, which are arranged opposite to each other along the length direction of the indoor unit 100. That is, the outer casing 13 includes two side plates 131, which are arranged opposite to each other along the length direction of the indoor unit 100.

Since condensation will be generated during the use of the indoor unit 100, in some embodiments, to prevent condensation from leaking from the gap between the sealing cover 7 and the housing 1, the opposite ends of the sealing cover 7 along the length of the indoor unit 100 abut against a side panel 131 and a motor bracket 14. This improves the sealing performance between the sealing cover 7 and the housing 1, thereby preventing condensation from flowing downwards to a certain extent.

To further improve the sealing performance between the sealing cover 7 and the housing 1, the contact area between the sealing cover 7 and the side plate 131 can be increased. Therefore, in some optional embodiments, the sealing cover 7 may further include a sealing portion 77, which is connected to the side of the cover body 73, abuts against the side plate 131, has its top end connected to the cover body 73, and its bottom end extending downwards from the cover body 73. This increases the contact area between the sealing cover 7 and the side plate 131, thereby improving the sealing performance between them.

In this embodiment, multiple cavities 771 arranged at intervals can also be formed on the sealing part 77. The depth direction of the cavity 771 is consistent with the length direction of the indoor unit 100. By setting the cavity 771, even when condensate flows down, it can be stored in the cavity 771, so as to avoid condensate flowing into the indoor environment to a certain extent.

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

It should be noted that the HVAC equipment provided in this embodiment should also include other components or modules such as an outdoor unit. These other components or modules will not be described in detail here.

Claims (18)

An indoor unit, comprising: The casing has a return air vent and an air outlet; The impeller and heat exchanger are disposed inside the casing and spaced apart between the return air inlet and the air outlet; Piping module, connected to the heat exchanger; A water receiving tray is disposed inside the casing and located below the heat exchanger; and A sealing cover is disposed inside the housing and located on one side of the heat exchanger. The sealing cover is located below a portion of the piping module structure and can guide the condensate generated by the portion of the piping module structure into the water receiving tray. The indoor unit according to claim 1, wherein the piping module includes a throttling valve and a connecting pipe assembly, the throttling valve being connected to the heat exchanger through the connecting pipe assembly; The sealing cap is located below the throttle valve and can guide the condensate generated by the throttle valve into the water receiving tray. According to claim 2, the indoor unit has a guide groove formed on the end face of the sealing cover facing the throttle valve, and the guide groove is configured to guide the condensate generated by the throttle valve into the drip tray. The indoor unit according to claim 3, wherein the bottom wall of the guide channel extends downward at an angle in the direction close to the water receiving tray. The indoor unit according to any one of claims 1 to 4, wherein a mounting cavity is formed at the bottom of the housing, and the bottom of the mounting cavity is an open opening; The sealing cap is exposed through the opening. The indoor unit according to claim 5 further includes a motor assembly, the motor assembly including a motor and a motor bracket configured to mount the motor, the motor being drivenly connected to the fan wheel, and the motor bracket being connected to the housing; The sealing cap is detachably connected between the motor bracket and the water receiving tray. According to claim 6, the indoor unit includes a main body and an edge portion connected to each other, the main body being located below the heat exchanger and the edge portion being located on one side of the heat exchanger; The sealing cap is detachably connected to the edge portion and the motor bracket on opposite sides. According to claim 7, the indoor unit is wherein the motor bracket and the edge portion are both engaged with the sealing cover. The indoor unit according to claim 8, wherein the sealing cover includes a cover body and a handle portion connected together; The cover body is engaged with the edge portion, the handle portion is engaged with the motor bracket, and the free end of the handle portion extends downward. According to claim 9, the indoor unit is provided with a first snap-fit portion on one of the cover body and the edge portion, and a snap-fit groove on the other. The first snap-fit portion snaps into the slot and engages with the slot to engage and connect the cover body and the edge portion. According to claim 9, the indoor unit is provided with a second snap-fit part on one of the handle and the motor bracket, and a snap-fit hole on the other. The second snap-fit part snaps into the snap-fit hole and engages with the snap-fit hole to engage and connect the handle part and the motor bracket. The indoor unit according to any one of claims 6 to 11, wherein a limiting structure is provided between the sealing cover and the motor bracket, the limiting structure being configured to limit the relative position between the sealing cover and the motor bracket in the length direction and the width direction of the indoor unit. The indoor unit according to claim 12, wherein the limiting structure includes a limiting protrusion, the limiting protrusion being disposed on one of the sealing cover and the motor bracket; The sealing cap and the other of the motor brackets are provided with a limiting hole for the limiting protrusion to be inserted. The indoor unit according to any one of claims 6 to 11, 13, wherein the housing includes two side plates disposed opposite to each other along the length direction of the indoor unit; The two opposite ends of the sealing cover along the length of the indoor unit respectively abut against a side plate and the motor bracket. The indoor unit according to any one of claims 2 to 4, wherein the projection of the throttle valve on the horizontal plane falls within the projection area of the sealing cover on the horizontal plane. The indoor unit according to any one of claims 1 to 4, 6 to 11, 13, wherein the sealing cover has a through hole for the refrigerant pipe assembly of the indoor unit to pass through, and the shape of the through hole is adapted to the contour shape of the refrigerant pipe assembly. The indoor unit according to any one of claims 1 to 4, 6 to 11, and 13 further includes a water pump assembly disposed at the bottom of the sealing cover and connected to the bottom of the water receiving tray. A heating, ventilation, and air conditioning (HVAC) device, comprising the indoor unit as described in any one of claims 1 to 17.