A low noise indoor heater

Abstract

The utility model belongs to indoor heating equipment technical field, concretely relates to a low noise's indoor heater, including inner casing, the fan that sets up in the inner casing, the air guide duct that connects in the fan exhaust end, and the heating element one that intercommunication sets up between the fan with the air guide duct, the air guide duct inside opposite inner wall between connection has at least a group with its synchronous extension's sound -absorbing piece, to with the space in the air guide duct is separated, makes the hot air shunt noise reduction and exports the inner casing outside. The utility model discloses at least a group with its synchronous extension's sound -absorbing piece is arranged in the air guide duct, the sound -absorbing piece not only can with the air current in the air guide duct is shunted, still can absorb the noise that the air current flow generates, thereby can effectively reduce the air current noise that the heater generates, realizes the noise reduction of air current and exports.

Description

Technical Field

[0001] This utility model belongs to the technical field of indoor heating equipment, specifically relating to a low-noise indoor heater. Background Technology

[0002] Indoor heaters are household / commercial devices that release heat into an indoor space using energy sources such as electricity, gas, and biomass to raise the temperature of a local or overall environment. They are widely used for winter heating, temporary supplemental heating, or special scenarios. Common types include PTC heaters with fan heating, infrared heating tube heaters, or fan-heated heaters (PTC heating element + infrared heating tube).

[0003] For specific details, please refer to a fan-type indoor heater, such as announcement number CN212961826U, which includes a panel and a base. The side surface of the base has an exhaust vent. A motor and a turbine are located inside the base and connected to each other. The exhaust vent is connected to a heating device, which includes a heating front shell, a heating bottom shell, an air guide shroud, a PTC heater, a PBT fixing shell, a limiting block, an upper support block, a lower support block, and a locking element. The PTC heater is located between the heating front shell and the heating bottom shell, within the PBT fixing shell. The limiting block, upper support block, and lower support block are fixed to the inner wall of the PBT fixing shell. The upper support block is placed on the lower surface of the PTC heater, and the lower support block is placed on the upper surface of the PTC heater. The limiting block rests on the side surface of the PTC heater. The locking element is installed in the PBT fixing shell. The heating front shell has a panel air inlet. The advantages of this invention are: by placing the PTC heater within the PBT fixing shell, this structure achieves the advantages of simple structure and reduced manufacturing cost.

[0004] Currently, when existing air-heated heaters are in use, the high-speed airflow, after passing through the air guide duct, will generate a large number of irregular and chaotic vortices due to the bends or other obstacles in the air guide duct. When these vortices break, they will generate a wide-band "whooshing" noise, which will affect the use.

[0005] In view of this, the present invention provides a low-noise indoor heater to solve the above problems. Utility Model Content

[0006] To achieve the above objectives, this utility model provides the following technical solution: a low-noise indoor heater, comprising an inner shell, a fan disposed within the inner shell, a guide duct connected to the exhaust end of the fan, and a heating element disposed between the fan and the guide duct. At least one set of sound-absorbing plates extending synchronously with the inner walls of the guide duct are connected to the opposing inner walls to divide the space within the guide duct, so that the hot air is diverted and noise-reduced before being discharged outside the inner shell.

[0007] As a preferred embodiment of the present invention, a low-noise indoor heater is provided with an air outlet and an air inlet on the surface of the inner shell relative to the exhaust end of the air guide duct and the air inlet end of the fan, respectively.

[0008] As a preferred embodiment of the low-noise indoor heater of this utility model, both the air outlet and the air inlet have a porous structure.

[0009] As a preferred embodiment of the present invention, a low-noise indoor heater, the sound-absorbing plate includes a protective plate body, a sound-absorbing component disposed inside the protective plate body, and a through hole formed on the surface of the protective plate body and communicating with the sound-absorbing component.

[0010] As a preferred embodiment of the low-noise indoor heater of this utility model, the interior of the air duct is also connected to a second heating element.

[0011] As a preferred embodiment of the present invention, a low-noise indoor heater is provided with guide rails on the surface of the inner shell where the air inlet is located, and a dustproof net covering the air inlet is movably inserted between the guide rails.

[0012] As a preferred embodiment of the present invention, a low-noise indoor heater further includes an outer shell fitted outside the inner shell, wherein the outer shell has an air outlet on its surface relative to the air outlet, and the surface of the outer shell relative to the air inlet is open.

[0013] As a preferred embodiment of the present invention, a low-noise indoor heater is provided in which the outer shell is spaced apart from the inner shell in the horizontal direction.

[0014] As a preferred embodiment of the low-noise indoor heater of this invention, the bottom of the outer casing is provided with pulleys.

[0015] Compared with the prior art, the beneficial effects of this utility model are:

[0016] 1. This utility model provides at least one set of sound-absorbing plates that extend synchronously within the airflow duct. These sound-absorbing plates can not only divert the airflow within the airflow duct but also absorb the noise generated by the airflow, thereby effectively reducing the airflow noise generated by the heater and achieving noise reduction in airflow discharge.

[0017] 2. This utility model provides a detachable dustproof net that covers the air inlet, which effectively filters dust from the environment and reduces the amount of dust entering the fan, thus preventing it from affecting the stable operation of the fan.

[0018] 3. By installing an outer shell spaced apart on the outside of the inner shell, this utility model can improve the overall strength of the heater, achieve heat insulation, and further improve the noise reduction effect. Attached Figure Description

[0019] The accompanying drawings are provided to further illustrate the present invention and form part of the specification. They are used together with the embodiments of the present invention to explain the present invention, but do not constitute a limitation thereof. In the drawings:

[0020] Figure 1 This is a three-dimensional structural diagram of Embodiment 1 of the present utility model;

[0021] Figure 2 This is an exploded structural diagram of Embodiment 1 of the present invention;

[0022] Figure 3 This is a cross-sectional structural diagram of the air duct of this utility model;

[0023] Figure 4 This is a schematic diagram of the cross-sectional structure of the sound-absorbing plate of this utility model;

[0024] Figure 5 This is a three-dimensional structural diagram of Embodiment 2 of the present invention;

[0025] Figure 6 This is a schematic diagram of the guide rail structure of this utility model;

[0026] Figure 7 This is a schematic diagram of the outer shell structure of this utility model;

[0027] Figure 8 This is a front-view three-dimensional structural diagram of Embodiment 3 of this utility model;

[0028] Figure 9 This is a rear-view three-dimensional structural diagram of Embodiment 3 of this utility model.

[0029] In the diagram: 1. Inner shell; 11. Top wall; 12. Bottom wall; 13. Side wall; 131. Air outlet; 132. Air inlet; 133. Control panel; 2. Fan; 3. Air duct; 4. Heating element one; 5. Heating element two; 6. Silencing plate; 61. Main body of protective plate; 62. Through hole; 63. Sound-absorbing component; 7. Guide rail; 8. Dustproof net; 9. Outer shell; 91. Air outlet of outer shell; 92. Mounting hole; 10. Pulley. Detailed Implementation

[0030] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0031] Example 1:

[0032] This utility model relates to a low-noise indoor heater, such as... Figures 1-4 As shown, it includes an inner shell 1, a fan 2 disposed inside the inner shell 1, a guide air duct 3 connected to the exhaust end of the fan 2, and a heating element 4 connecting the fan 2 and the guide air duct 3.

[0033] Specifically, the inner shell 1 includes a top wall 11, a bottom wall 12, and four side walls 13 surrounding the top wall 11 and the bottom wall 12 to enclose the fan 2 and the air duct 3. An air outlet 131 for discharging hot air and an air inlet 132 for drawing air from the fan 2 are respectively provided on the surface of the inner shell 1 relative to the exhaust end of the air duct 3 and the air inlet end of the fan 2. A control panel 133 is installed on the surface of the inner shell 1 to control the fan 2 and the heating element 4. In this embodiment, the heating element 4 is a common PTC ceramic heating element, and the fan 2 is a vortex double-impeller fan. When the fan 2 is activated, it generates airflow. The airflow is heated after passing through the PTC ceramic heating element and is then discharged from the air outlet 131 through the air duct 3.

[0034] Among them, such as Figure 3 As shown, at least one set of sound-absorbing plates 6 extending synchronously are connected between the opposing inner walls of the airflow duct 3. The two ends of the sound-absorbing plates 6 extend to both ends of the airflow duct 3 to divide the space inside the airflow duct 3. The number of sound-absorbing plates 6 can be determined according to the internal dimensions of the airflow duct 3. In this embodiment, the sound-absorbing plates 6 are arranged horizontally, but they can also be arranged vertically.

[0035] Specifically, such as Figure 4 As shown, the sound-absorbing plate 6 includes a protective plate body 61, a sound-absorbing element 63 disposed inside the protective plate body 61, and multiple through holes 62 evenly or spaced on the surface of the protective plate body 61 and communicating with the sound-absorbing element 63. In this embodiment, the sound-absorbing element 63 is made of sound-absorbing material, such as glass fiber, glass wool, rock wool, or foamed metal. When a high-speed airflow enters the airflow duct 3, it is diverted into multiple smaller airflows by the sound-absorbing plate 6. At the same time, the pressure reduction by the through holes 62 of the sound-absorbing plate 6 and the sound absorption by the sound-absorbing element 63 can effectively reduce the generation of noise and achieve noise reduction in airflow discharge.

[0036] In addition, to improve the controllability of the hot air temperature and further reduce noise, a second heating element 5 can be connected inside the airflow duct 3, and the air outlet 131 and air inlet 132 can be configured as a porous structure. In this embodiment, the second heating element 5 is a common infrared heating tube, the air outlet 131 is configured with an 8.5×8.5mm hexagonal aperture, the air inlet 132 is configured with a 5.8×5mm rectangular aperture, and the porosity is ≥90%.

[0037] Example 2:

[0038] Figures 5-6 The second embodiment of this utility model is shown, which differs from the first embodiment in that: the surface of the inner housing 1 where the air inlet 132 is located is further provided with guide rails 7, and a dustproof net 8 covering the air inlet 132 is movably inserted between the guide rails 7. The dustproof net 8 can filter dust onto its surface, thus solving the problem that the airflow generated by the fan 2 during operation will carry dust and / or everyday debris (such as hair, rags, etc.) into the fan 2 and / or the inner housing 1, causing the fan 2 to jam and affecting its operation; at the same time, by lifting the dustproof net 8, it can slide out from between the guide rails 7 for subsequent cleaning of the filtered dust.

[0039] Example 3:

[0040] Figures 7-8 The third embodiment of the present invention is shown, which differs from the first and / or second embodiments described above only in that an outer shell 9 is also provided, which is sleeved outside the inner shell 1.

[0041] The outer casing 9 has an air outlet 91 on its surface relative to the air outlet 131, and the surface of the outer casing 9 relative to the air inlet 132 is open to allow for the disassembly and assembly of the heater and the exposure of the surface of the inner casing 1 where the air inlet 132 is located. A mounting hole 92 is also provided on the surface of the outer casing 9, through which the control panel 133 can be mounted or exposed for convenient control.

[0042] In this embodiment, the outer shell 9 is made of 12mm thick synthetic MDF plywood E1, and the inner shell 1 is made of 1.0mm thick cold-rolled steel. A 50mm gap is maintained between the outer shell 9 and the inner wall and inner shell 1 in the horizontal direction. This gap ensures the circulation of internal air and reduces noise to below 40 decibels, completely solving the mechanical noise interference during nighttime rest. The outer shell 9 also provides heat insulation to prevent burns and further reduces noise.

[0043] In another embodiment, the bottom of the outer casing 9 is provided with pulleys 10, such as casters, to facilitate easy movement of the entire heater.

[0044] Finally, it should be noted that the above description is merely a preferred embodiment of this utility model and is not intended to limit the utility model. Although the utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this utility model should be included within the protection scope of this utility model.

Claims

1. A low-noise indoor heater, comprising an inner shell (1), a fan (2) disposed within the inner shell (1), a guide duct (3) connected to the exhaust end of the fan (2), and a heating element (4) connecting the fan (2) and the guide duct (3), characterized in that: At least one set of sound-absorbing plates (6) that extend synchronously with the inner walls of the air duct (3) are connected to each other to divide the space inside the air duct (3) so that the hot air is diverted and reduced in noise before being discharged outside the inner shell (1).

2. The low-noise indoor heater according to claim 1, characterized in that: The inner shell (1) has an air outlet (131) and an air inlet (132) respectively on the surface of the exhaust end of the air guide duct (3) and the air inlet end of the fan (2).

3. The low-noise indoor heater according to claim 2, characterized in that: Both the air outlet (131) and the air inlet (132) are porous structures.

4. The low-noise indoor heater according to claim 1, characterized in that: The sound-absorbing plate (6) includes a protective plate body (61), a sound-absorbing component (63) disposed inside the protective plate body (61), and a through hole (62) formed on the surface of the protective plate body (61) and communicating with the sound-absorbing component (63).

5. The low-noise indoor heater according to claim 1, characterized in that: The interior of the air duct (3) is also connected to a second heating element (5).

6. The low-noise indoor heater according to claim 2, characterized in that: The surface of the inner shell (1) where the air inlet (132) is located is also provided with guide rails (7), and a dustproof net (8) covering the air inlet (132) is movably inserted between the guide rails (7).

7. The low-noise indoor heater according to claim 6, characterized in that: It also includes an outer shell (9) fitted outside the inner shell (1), the outer shell (9) having an outer shell air outlet (91) on its surface relative to the air outlet (131), and the outer shell (9) having an open surface relative to the air inlet (132).

8. The low-noise indoor heater according to claim 7, characterized in that: The outer shell (9) is spaced apart from the inner shell (1) on its horizontal inner wall.

9. The low-noise indoor heater according to claim 7, characterized in that: The bottom of the outer casing (9) is provided with pulleys (10).

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