Indoor unit and heating and ventilation device

Abstract

The application provides an indoor unit and a heating and ventilation device. The indoor unit comprises a water pan, a face frame, and sealing cotton between the water pan and the face frame. The face frame and the water pan are clamped together. The face frame is provided with a buckle extending in a first direction. The water pan is provided with a clamping groove corresponding to the buckle. During clamping, the sealing cotton is always in an initial state. The application solves the technical problem that the length of the buckle in the vertical direction is generally short in the prior art, which causes the sealing cotton to be highly concentrated when the buckle and the water pan clamping groove are matched, and the sealing cotton is easily locally over-deformed.

Description

Technical Field

[0001] This utility model relates to the field of air conditioning technology, and more specifically, to an indoor unit and a heating, ventilation and air conditioning (HVAC) device. Background Technology

[0002] With the improvement of people's living standards and the increasing demand for indoor environmental comfort, air conditioners have become an indispensable air conditioning device in homes, offices, commercial spaces and other scenarios. As the core component of the air conditioning system that directly interacts with the indoor environment, the rationality of the structural design of the indoor unit directly affects the installation efficiency, convenience of daily maintenance, stability of use and safety.

[0003] To enable quick assembly, the frame and drip tray of existing air conditioning indoor units are usually connected by snap-fit. To prevent condensate from leaking from the contact surface between the frame and the drip tray, sealing cotton is installed between them to ensure a tight seal.

[0004] However, the relevant technology has at least one of the following problems: The existing technology generally uses short clips in the vertical direction, typically only 5-10mm. This short clip design results in highly concentrated pressure on the sealing cotton when the clip engages with the drip tray, easily leading to excessive local deformation. Excessively deformed sealing cotton generates significant reaction force during installation, i.e., installation resistance. Installers need to apply greater force to engage the frame and drip tray, reducing installation efficiency (conventional installation requires 2-3 people or takes more than 15 minutes), and potentially causing damage or tearing of the sealing cotton due to excessive force. Damaged sealing cotton leads to a loss of seal between the frame and drip tray, easily causing condensation leakage, which can damage interior walls, floors, or furniture, increasing user maintenance costs and damaging the product's market reputation. Utility Model Content

[0005] This invention addresses the technical problem in the prior art where the vertical length of the buckle is generally too short, which leads to a high concentration of compressive force on the sealing cotton when the buckle engages with the water tray groove, making it prone to localized excessive deformation.

[0006] To solve the above problems, this utility model provides an indoor unit, including: a water tray; a front frame, the front frame and the water tray being snapped together, and a sealing cotton is provided between the water tray and the front frame; wherein, the front frame is provided with a buckle extending in a first direction, and the water tray is provided with a groove corresponding to the buckle; during the snapping process, the sealing cotton is always in the initial state.

[0007] Compared with existing technologies, the technical effects achieved by this solution are as follows: the front panel can be detachably installed inside the indoor unit, serving both protective and decorative functions. The inner side of the front panel has clips for engaging with the drip tray. The drip tray, positioned above the front panel, collects condensate, and its edge has grooves corresponding to the clips on the front panel. By ensuring that the sealing cotton remains in its initial state (i.e., uncompressed) during the engagement of the drip tray and front panel, unexpected deformation of the sealing cotton during installation is fundamentally avoided, thus reducing installation resistance and pre-installation difficulty. A single person can complete the engagement of the drip tray and front panel, saving installation time. Simultaneously, the sealing cotton maintains its initial shape (no tears, no permanent deformation), further extending the seal life and reducing condensate leakage.

[0008] In one embodiment of this utility model, the slot is provided with a locking platform that cooperates with the buckle; the end of the buckle away from the face frame is provided with a hook, and the hook and the locking platform cooperate; wherein, when the water receiving tray and the face frame are in the first locking state, the hook and the locking platform abut against each other.

[0009] Compared with existing technologies, the technical effects achieved by this solution are as follows: the mechanical contact between the hook and the slot forms a "locking point," and the contact structure prevents the buckle from easily coming out of the slot, thus enhancing the positioning reliability of the first engagement state; it also reduces the disengagement rate, and the installation process does not require repeated insertion.

[0010] In one embodiment of this utility model, when the water receiving tray and the face frame are in the first snap-fit ​​state, the gap between the water receiving tray and the face frame is greater than or equal to the thickness of the sealing cotton in the first direction.

[0011] Compared with existing technologies, the technical effects achieved by this technical solution are as follows: the first snap-fit ​​state occurs when the face frame approaches the water tray, which is the moment when the buckle and the slot first snap-fit ​​(also known as the initial snap-fit ​​stage); by limiting "the gap between the water tray and the face frame is greater than or equal to the thickness of the sealing cotton in the first direction during the first snap-fit ​​state", it can be further determined that the sealing cotton will not be squeezed and thus generate resistance during the snap-fit ​​process.

[0012] In one embodiment of this utility model, the buckle has a first end and a second end, the first end is connected to the face frame and the second end is connected to the hook; the buckle also has an inclined guide surface, which is inclined from the first end to the second end toward the direction close to the card platform.

[0013] Compared with existing technologies, the technical effects achieved by this technical solution are as follows: the guide surface is inclined towards the card table from the first end to the second end, which can automatically guide the buckle to align with the card slot, reduce the jamming rate, and at the same time avoid the buckle from deforming in the first engagement state, thus improving the reliability of the buckle's engagement.

[0014] In one embodiment of this utility model, the faceplate is provided with an opening, and the projection area of ​​the opening in the first direction covers the projection of the card slot in the first direction.

[0015] Compared with existing technologies, the technical effects achieved by this solution are as follows: operators can directly observe and adjust the positions of the clips and slots through the opening, improving overall installation efficiency; at the same time, the opening covering the slots ensures unobstructed vision, avoiding mis-clamping caused by "blind operation" and improving the accuracy of installation and maintenance; the larger opening can accommodate the operator's hands or special tools, and is especially suitable for slots in complex locations such as corners and edges of indoor units, reducing the difficulty of operation.

[0016] In one embodiment of this utility model, the inner edge of the opening is designed as an arc.

[0017] Compared with existing technologies, the technical effects achieved by adopting this technical solution are: the arc-shaped inner edge eliminates the risk of hand scratches, conforms to ergonomic design, and improves the user experience for operators.

[0018] In one embodiment of this utility model, the indoor unit further includes: a base plate on which a face frame is mounted; and inserts that are fitted onto the base plate and which fix the face frame to the base plate.

[0019] Compared with existing technologies, the technical effects achieved by adopting this technical solution are as follows: By introducing an intermediate force-bearing carrier through the design of "insertion plate cooperating to fix the face frame and the base plate", the bolt fixing force is transmitted through the insertion plate, avoiding direct force on the base plate, reducing the bolt hole stripping rate, and greatly reducing the base plate deformation rate; at the same time, the supporting effect of the insertion plate enhances the connection strength between the base plate and the face frame, reduces the risk of equipment tilting, and significantly improves the safety of use.

[0020] In one embodiment of this utility model, the base plate is provided with a slot corresponding to the position of the insert piece, and the insert piece is installed on the base plate through the slot; the insert piece is provided with a first insertion hole, and the face frame is provided with a first screw hole corresponding to the position of the first insertion hole, and the screw passes through the first screw hole and the first insertion hole to fix the insert piece to the face frame.

[0021] Compared with the existing technology, the technical effect achieved by adopting this technical solution is as follows: the screw forms a rigid connection of "insert-face frame" through the cooperation of the first insertion hole and the first screw hole, which reduces the loosening rate of the insert and improves the fixing strength.

[0022] In one embodiment of this utility model, the insert is provided with a second insertion hole, and the base plate is provided with a second screw hole at the position corresponding to the second insertion hole. The screw passes through the second screw hole and the second insertion hole to fix the insert to the bottom.

[0023] Compared with existing technologies, the technical effects achieved by this technical solution are as follows: the insert is fixed to the face frame (first screw hole + first insertion hole) and the base plate (second screw hole + second insertion hole) at the same time, forming a rigid whole of "face frame-insert-base plate", realizing double-sided fixing of the insert, and improving the connection strength compared with single-sided fixing; double-sided fixing avoids relative movement between the insert and the face frame and base plate, and extends the service life of the equipment.

[0024] On the other hand, this utility model also provides a heating and ventilation equipment, including an indoor unit as described in Embodiment 1 above; an outdoor unit, and the outdoor unit and the indoor unit are connected.

[0025] Compared with the prior art, the technical effects achieved by adopting this technical solution are as follows: The HVAC equipment in this embodiment has all the beneficial effects of the indoor unit of any embodiment of this utility model, which will not be repeated here.

[0026] By adopting the technical solution of this utility model, the following technical effects can be achieved: (1) By limiting the sealing cotton to the initial state (i.e., uncompressed state) during the connection process between the water tray and the face frame, the unexpected deformation of the sealing cotton during the installation stage is fundamentally avoided, thereby reducing the installation resistance and the difficulty of pre-installation. A single person can complete the connection between the water tray and the face frame, saving installation time. (2) A larger opening can accommodate the operator's hands or special tools, which is especially suitable for slots in complex locations such as corners and edges of indoor units, reducing the difficulty of operation; (3) By using the design of “insert plate to fix the face frame and the base plate”, an intermediate force carrier is introduced; the bolt fixing force is transmitted through the insert plate, avoiding direct force on the base plate, reducing the thread stripping rate of the screw hole, and greatly reducing the deformation rate of the base plate; at the same time, the supporting effect of the insert plate enhances the connection strength between the base plate and the face frame, reduces the risk of equipment tilting, and significantly improves the safety of use. Attached Figure Description

[0027] To more clearly illustrate the technical solutions of the embodiments of this utility model, the drawings to be used in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort. Figure 1 This is a schematic diagram of the structure of an indoor unit provided in Embodiment 1 of this utility model; Figure 2 for Figure 1 A magnified view of region A in the image; Figure 3 for Figure 1 A partial structural diagram of the indoor unit from another perspective; Figure 4 for Figure 3 A magnified view of region B in the image; Figure 5 for Figure 1 Another structural diagram of the mid-frame; Figure 6 for Figure 5 A magnified view of region C in the image; Figure 7 for Figure 1 A cross-sectional view of the indoor unit from another perspective; Figure 8 for Figure 7 A magnified view of region D in the image; Figure 9 for Figure 7 A structural schematic diagram of the interstitial piece from another perspective.

[0028] Explanation of reference numerals in the attached figures: 10. Base plate; 30. Insert plate; 310. First long side; 311. First insertion hole; 320. Second long side; 321. Second insertion hole; 100. Water receiving tray; 120. Slot; 121. Slot platform; 200. Face frame; 210. Buckle; 211. Hook; 212. Guide surface; 216. First end; 217. Second end; 220. Opening. Detailed Implementation

[0029] To make the above-mentioned objectives, features, and advantages of this utility model more apparent and understandable, the technical solutions in the embodiments of this utility model are clearly and completely described. Obviously, the described embodiments are only some embodiments of this utility model, and not all embodiments. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of this utility model.

[0030] Example 1 See Figure 1 This utility model provides an indoor unit, combined with Figures 2-9 The indoor unit includes a water tray 100 and a front frame 200, which are snapped together, and a sealing cotton is provided between the water tray 100 and the front frame 200; wherein, the front frame 200 is provided with a buckle 210 extending in a first direction, and the water tray 100 is provided with a groove 120 corresponding to the buckle 210; during the snapping process, the sealing cotton is always in the initial state.

[0031] In one specific embodiment, the face frame 200 is detachably installed on the indoor unit, serving both protective and decorative functions. The inner side of the face frame 200 is provided with a buckle 210 for engaging with the water tray 100. The water tray 100 is positioned above the face frame 200 for collecting condensate. The edge of the water tray 100 is provided with a groove 120 corresponding to the buckle 210 of the face frame 200. When the sealing cotton (not shown in the figure) is in its initial state, it indicates that the sealing cotton has not received any compression force and has not deformed. D1 is the first direction, which is the height direction of the sealing cotton. The buckle 210 extends along the thickness direction of the sealing cotton (the first direction) to prevent the buckle 210 from laterally squeezing the sealing cotton during the engagement process. This application, by limiting the connection between the water tray 100 and the face frame 200 to "always keeping the sealing cotton in its initial state (i.e., uncompressed state)", fundamentally avoids unexpected deformation of the sealing cotton during the installation stage, thereby reducing installation resistance and pre-installation difficulty. A single person can complete the connection between the water tray 100 and the face frame 200, saving installation time. At the same time, the sealing cotton always maintains its initial shape (no tearing, no permanent deformation), which can further extend the sealing life and reduce the condensate leakage rate.

[0032] Further, see Figures 2-4 The slot 120 is provided with a locking platform 121 that cooperates with the buckle 210; the end of the buckle 210 away from the face frame 200 is provided with a hook 211, which cooperates with the locking platform 121; wherein, when the water receiving tray 100 and the face frame 200 are in the first locking state, the hook 211 and the locking platform 121 abut against each other.

[0033] Specifically, the mechanical contact between the hook 211 and the slot 121 forms a "locking point". The contact structure prevents the buckle 210 from easily coming out of the slot 120, thus enhancing the positioning reliability of the first snap-fit ​​state and reducing the de-snagging rate. The installation process does not require repeated insertion.

[0034] Preferably, the cross-sectional shape of the hook 211 is triangular, and the triangular hook 211 can improve the strength of the buckle 210.

[0035] Furthermore, when the water receiving tray 100 and the face frame 200 are in the first snap-fit ​​state, the gap between the water receiving tray 100 and the face frame 200 is greater than or equal to the thickness of the sealing cotton in the first direction.

[0036] Specifically, in the existing design, the initial fit gap between the water tray 100 and the face frame 200 is generally smaller than the thickness of the sealing cotton (e.g., a gap of 3mm and a sealing cotton thickness of 5mm). This causes the sealing cotton to be squeezed as soon as the water tray 100 comes into contact with the face frame 200, making it impossible to achieve the goal of "keeping the sealing cotton in its initial state during the snap-fit ​​process".

[0037] The first engagement occurs as the faceplate 200 approaches the drip tray 100, marking the first engagement of the buckle 210 and the slot 120 (also known as the initial engagement stage). By defining that "in the first engagement state, the gap between the drip tray 100 and the faceplate 200 is greater than or equal to the thickness of the sealing cotton in the first direction," it can be further ensured that the sealing cotton will not be compressed and thus create resistance during the engagement process. Specifically, by extending the length of the buckle 210 in the first direction, the effect of "in the first engagement state, the gap between the drip tray 100 and the faceplate 200 is greater than or equal to the thickness of the sealing cotton in the first direction" is achieved.

[0038] Furthermore, the buckle 210 has a first end 216 and a second end 217. The first end 216 is connected to the face frame 200, and the second end 217 is connected to the hook 211. The buckle 210 also has an inclined guide surface 212, which is inclined from the first end 216 to the second end 217 toward the direction close to the card table 121.

[0039] Specifically, the guide surface 212 is inclined towards the card table 121 from the first end 216 to the second end 217, which can automatically guide the buckle 210 to align with the card slot 120, reduce the jamming rate, and at the same time prevent the buckle 210 from deforming in the first snap-fit ​​state, thereby improving the engagement reliability of the buckle 210.

[0040] Further, see Figures 5-6 The face frame 200 is provided with an opening 220, and the projection area of ​​the opening 220 in the first direction covers the projection of the card slot 120 in the first direction.

[0041] Specifically, the design of "the projection of the opening 220 in the first direction covering the projection of the slot 120" provides a dedicated operating space for the snap-fit ​​structure. Operators can directly observe and adjust the positions of the buckle 210 and the slot 120 through the opening 220, improving the overall installation efficiency. At the same time, the opening 220 covering the slot 120 ensures that the operator's line of sight is unobstructed, avoiding snap-fit ​​errors caused by "blind operation" and improving the accuracy of installation and maintenance.

[0042] Preferably, the openings 220 and the slots 120 are set in a one-to-one correspondence; the one-to-one correspondence of the openings 220 ensures that each slot 120 has a dedicated operating space and no "operation blind spot", completely avoiding the difference in operation caused by the different positions of the slots 120; the larger openings 220 can accommodate the operator's hands or special tools, which is especially suitable for slots 120 in complex positions such as corners and edges of indoor units, reducing the difficulty of operation.

[0043] Preferably, the opening 220 is large enough to allow a finger to be inserted, making it easy to pry the buckle 210 out of the slot 120, thereby reducing the difficulty of disassembly.

[0044] Furthermore, the inner edge of opening 220 is designed with an arc shape.

[0045] Specifically, the inner edge of the existing indoor unit opening 220 is mostly designed with a right angle, which can easily scratch the operator's hand (especially during maintenance), posing a safety risk; the arc-shaped inner edge of this application eliminates the risk of hand scratches, conforms to ergonomic design, and improves the user experience of the operator.

[0046] Further, see Figures 7-8 The indoor unit also includes: a base plate 10 and inserts 30. A face frame 200 is installed on the base plate 10. The inserts 30 are fitted onto the base plate 10, and the face frame 200 is fixedly installed onto the base plate 10 through the inserts 30.

[0047] Specifically, the existing indoor unit base plate 10 and front frame 200 are mostly directly fixed with bolts. Because the base plate 10 is designed for lightweight use, it is generally made of thin sheet material (thickness 0.8-1.2mm), which has significant defects: First, the base plate 10 is not strong enough, and the bolt holes are prone to stripping when tightening the bolts, resulting in poor fixing reliability; Second, the base plate 10 is prone to deformation due to concentrated stress, which increases the gap between the front frame 200 and the base plate 10, and generates vibration and noise during operation; Third, after long-term use, the fixing structure may loosen, which may cause the equipment to tilt, posing a safety hazard.

[0048] Therefore, this application introduces an intermediate force-bearing carrier through the design of "insert 30 cooperating with fixed face frame 200 and base plate 10"; the insert 30 transmits the bolt fixing force, avoiding direct force on the base plate 10, reducing the thread stripping rate of the screw holes, and greatly reducing the deformation rate of the base plate 10; at the same time, the supporting effect of the insert 30 enhances the connection strength between the base plate 10 and the face frame 200, reduces the risk of equipment tilting, and significantly improves the safety of use.

[0049] Further, see Figure 9 The base plate 10 is also provided with a slot corresponding to the position of the insert 30. The insert 30 is installed on the base plate 10 through the slot. The insert 30 is provided with a first insertion hole 311. The face frame 200 is provided with a first screw hole corresponding to the position of the first insertion hole 311. The screw passes through the first screw hole and the first insertion hole 311 to fix the insert 30 to the face frame 200.

[0050] Specifically, the constraint effect of the slot on the insert 30 can ensure that the installation position of the insert 30 is completely matched with the design position, thereby improving the overall structural accuracy. The insert 30 includes a first long side 310 that connects with the face frame 200, and a first insertion hole 311 is provided on the first long side 310. The screw forms a rigid connection between the insert 30 and the face frame 200 through the engagement of the first insertion hole 311 and the first screw hole, thereby reducing the loosening rate of the insert 30 and improving the fixing strength.

[0051] Furthermore, the insert 30 is provided with a second insertion hole 321, and the base plate 10 is provided with a second screw hole corresponding to the position of the second insertion hole 321. The screw passes through the second screw hole and the second insertion hole 321 to fix the insert 30 to the base plate 10.

[0052] Specifically, the insert 30 also includes a second long side 320 that connects with the base plate 10, and a second insertion hole 321 is provided on the second long side 320; the insert 30 is simultaneously fixed to the face frame 200 (first screw hole + first insertion hole 311) and the base plate 10 (second screw hole + second insertion hole 321) to form a rigid whole of "face frame 200-insert 30-base plate 10", realizing double-sided fixing of the insert 30, and improving the connection strength compared with single-sided fixing; double-sided fixing avoids relative movement between the insert 30 and the face frame 200 and the base plate 10, and extends the service life of the equipment.

[0053]

Example 2

[0054] Specifically, this embodiment can achieve the technical effects corresponding to any of the technical solutions in Embodiment 1 above, which will not be repeated here.

[0055] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of this utility model, and not to limit it. Although this utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of this utility model.

Claims

1. An indoor unit, characterized in that, The indoor unit includes: Water receiving tray (100); A face frame (200) is provided, which is engaged with the water receiving tray (100), and a sealing cotton is provided between the water receiving tray (100) and the face frame (200). The face frame (200) is provided with a buckle (210) extending along a first direction, and the water receiving tray (100) is provided with a slot (120) corresponding to the buckle (210); during the buckle (210) and the slot (120) engagement process, the sealing cotton is always in the initial state.

2. The indoor unit according to claim 1, characterized in that, The slot (120) is provided with a card platform (121) that cooperates with the buckle (210); The buckle (210) has a hook (211) at one end away from the face frame (200), and the hook (211) cooperates with the card holder (121); When the water receiving tray (100) and the face frame (200) are in the first snap-fit ​​state, the hook (211) and the platform (121) abut against each other.

3. The indoor unit according to claim 2, characterized in that, When the water receiving tray (100) and the face frame (200) are in the first snap-fit ​​state, the gap between the water receiving tray (100) and the face frame (200) is greater than or equal to the thickness of the sealing cotton in the first direction.

4. The indoor unit according to any one of claims 2-3, characterized in that, The buckle (210) has a first end (216) and a second end (217), the first end (216) is connected to the face frame (200), and the second end (217) is connected to the hook (211); The buckle (210) is also provided with an inclined guide surface (212), which is inclined from the first end (216) to the second end (217) toward the card table (121).

5. The indoor unit according to any one of claims 2-3, characterized in that, The face frame (200) is provided with an opening (220), and the projection area of ​​the opening (220) in the first direction covers the projection of the card slot (120) in the first direction.

6. The indoor unit according to claim 5, characterized in that, The inner edge of the opening (220) is arc-shaped.

7. The indoor unit according to claim 1, characterized in that, The indoor unit also includes: A base plate (10), on which the face frame (200) is mounted; Insert (30) is fitted onto the base plate (10) and the face frame (200) is fixedly installed onto the base plate (10) through the insert (30).

8. The indoor unit according to claim 7, characterized in that, The base plate (10) is also provided with a slot corresponding to the position of the insert (30), and the insert (30) is installed onto the base plate (10) through the slot; The insert (30) is provided with a first insertion hole (311), and the face frame (200) is provided with a first screw hole corresponding to the first insertion hole (311). The screw passes through the first screw hole and the first insertion hole (311) to fix the insert (30) to the face frame (200).

9. The indoor unit according to claim 8, characterized in that, The insert (30) is provided with a second insertion hole (321), and the base plate (10) is provided with a second screw hole corresponding to the position of the second insertion hole (321). The screw passes through the second screw hole and the second insertion hole (321) to fix the insert (30) to the base plate (10).

10. A heating, ventilation, and air conditioning (HVAC) device, characterized in that, include: Indoor unit as claimed in any one of claims 1-9; An outdoor unit is connected to the indoor unit.

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