Fan with double blowing channels

Abstract

The utility model relates to a fan with double blowing channels. An air outlet of an existing fan cannot be used in cooperation with a linear electric appliance. The fan comprises a shell internally provided with a volute cavity and fan blades arranged in the volute cavity, the fan blades rotate and drive airflow to flow in the circumferential direction of the volute cavity, two air blowing channels communicated with the indoor space are arranged on the periphery of the volute cavity, and the air blowing channels are arranged in a central symmetry mode with the axis of the volute as the center. The fan blades rotate and drive the airflow to be evenly dispersed into the air blowing channels so that a linear air outlet area can be formed on the bottom face of the shell. The air blowing channels arranged in the central symmetry mode are arranged on the two sides of the volute, the linear air outlet area can be formed on the bottom face of the shell, the ventilation electric appliance is suitable for the linear air outlet, it is guaranteed that all the areas of the linear air outlet area have balanced air volume by shortening the distance between the air outlet and the volute, and the use experience is improved.

Description

Technical Field

[0001] The utility model relates to the field of ventilation equipment, in particular to a fan. Background Art

[0002] The existing fan includes a shell with a volute inside and fan blades arranged in the volute. The volute has only one air outlet, which results in that the length of the air outlet area on the bottom of the shell is limited due to the limitation of the air flow transmission distance, and it cannot be applied to ventilation appliances with linear air outlets. It is also necessary to set up multiple volutes with fan blades to meet the needs of different functions, resulting in a complex structure, increased assembly difficulty and production cost, and affecting the user experience. Utility Model Content

[0003] In order to address the deficiencies of the prior art, the utility model provides a fan with dual blowing channels, which forms a linear air outlet area on the bottom surface of the shell by arranging blowing channels on both sides of the volute in a centrally symmetrical manner. The fan is suitable for ventilation appliances with linear air outlets to enhance the user experience.

[0004] The utility model is realized in the following manner: a fan with double blowing channels, including a shell with a spiral cavity and a fan blade arranged in the spiral cavity, the fan blade rotates and drives the airflow to flow along the circumference of the spiral cavity, the periphery of the spiral cavity is provided with two blowing channels connected to the indoor space, the blowing channels are arranged in a centrally symmetrical manner with the axis of the spiral case as the center, the fan blade rotates and drives the airflow to be evenly dispersed into each blowing channel to form a linear air outlet area on the bottom surface of the shell. By arranging the blowing channels arranged in a centrally symmetrical manner on both sides of the spiral case, a linear air outlet area can be formed on the bottom surface of the shell, which is suitable for ventilation appliances with linear air outlets, and by shortening the distance between the air outlet and the spiral case, it is ensured that each area of ​​the linear air outlet area has a balanced air volume, thereby improving the user experience.

[0005] Preferably, both ends of the bottom surface of the shell are provided with air outlets, and the blowing channel is connected between the volute and the corresponding air outlet, so that the airflow in the volute flows through the blowing channel and the corresponding air outlet and is then transported to the indoor space. The blowing channel is connected between the volute and the air outlet, and the air outlet and the blowing channel are arranged on both sides of the volute in a central corresponding manner, so that the two air outlets have a balanced air volume, ensuring that each air outlet forming a linear air outlet area can transport air to the indoor space with a balanced air volume, so that each area of ​​the room can evenly receive the airflow from the fan.

[0006] Preferably, the axis of the blowing channel is arranged in an arc shape, one end of the axis of the blowing channel is arranged tangentially to the periphery of the volute, and the other end is bent outward and exposed downward through the corresponding air outlet to reduce the wind resistance of the airflow when it flows through the blowing channel. By setting an arc-shaped blowing channel, the airflow is diverted and the kinetic energy loss of the airflow during the diversion is reduced, ensuring that the air volume meets the use requirements.

[0007] Preferably, the air outlet is in the shape of an elongated strip and is arranged along the length direction of the shell to form the linear air outlet area. The rectangular air outlet can be assembled to form a linear air outlet area, which is convenient for use with the linear gaps between the decorative panels.

[0008] Preferably, the center lines of the air outlets overlap and pass through the axis of the volute, so that the airflow in the volute is evenly distributed to each blowing channel. The air outlet and the volute are located on the same straight line, which facilitates air outlet and air intake through the linear gap between the decorative panels.

[0009] Preferably, an air guide bracket with a PTC heating block is provided at the air outlet, which not only guides and redirects the airflow, but also fixes the PTC heating block, ensuring that the airflow flows through the PTC heating block and forms hot air.

[0010] Preferably, the air guide bracket includes an air receiving portion connected to the end of the air blowing channel and an air guide portion on which the PTC heating block is arranged. The air receiving portion receives the airflow from the air blowing channel and heats and discharges the air through the air guide portion after turning to flow downward. The air receiving portion extends upward and fits with the wall surface of the air blowing channel port, effectively reducing the resistance of the airflow during flow. The air guide portion is used to guide the airflow to the air outlet and ensure that the airflow can flow through the PTC heating block, thereby increasing the contact area to improve the heating effect.

[0011] Preferably, the periphery of the volute is provided with a ventilation channel connected to the outdoor space, the axes of the blowing channel and the ventilation channel are arranged tangentially along the periphery of the volute cavity in opposite directions, and the fan blades switch the airflow path between the blowing channel and the ventilation channel by switching between forward and reverse bidirectional rotation. The axes of the blowing channel and the ventilation channel are arranged tangentially along the periphery of the volute cavity in opposite directions, and the fan blades switch the airflow to the blowing channel or the ventilation channel by switching between forward and reverse bidirectional rotation, thereby switching the airflow path in the fan, which simplifies the structure, facilitates production, reduces equipment costs, and effectively reduces the volume of the shell and improves the user experience.

[0012] Preferably, the side wall of the housing is provided with a ventilation port, one end of the ventilation channel is tangentially arranged with the periphery of the volute, and the other end is connected with the ventilation port. The ventilation outlet is arranged on the long side wall of the housing, which can not only ensure that the ventilation outlet is hidden above the decorative panel, but also effectively shorten the length of the ventilation channel, thereby reducing air flow resistance.

[0013] Preferably, the blowing channel, volute and ventilation channel are located in the same horizontal plane, which not only effectively reduces the thickness of the shell and facilitates installation, but also reduces wind resistance by reducing the bending sections in the airflow path, thereby improving the airflow delivery efficiency.

[0014] The beneficial effects of the utility model are as follows: by arranging the blowing channels in a centrally symmetrical manner on both sides of the volute, a linear air outlet area can be formed on the bottom surface of the shell, which is suitable for ventilation appliances with linear air outlets, and by shortening the distance between the air outlet and the volute, it is ensured that each area of ​​the linear air outlet area has a balanced air volume, thereby improving the user experience. In addition, the axes of the blowing channel and the ventilation channel are arranged tangentially along the periphery of the volute cavity in opposite directions to each other, and the fan blades deliver the airflow to the blowing channel or the ventilation channel through forward and reverse bidirectional switching, thereby realizing the switching of the airflow flow path in the fan, which not only simplifies the structure, facilitates production, and reduces equipment costs, but also effectively reduces the volume of the shell and improves the user experience. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 is a schematic cross-sectional structural diagram of the fan;

[0016] Figure 2 A schematic diagram of the disassembled structure of the fan;

[0017] In the figure: 1. volute, 2. shell, 3. fan blades, 4. air blowing channel, 5. air outlet, 6. air guide bracket, 7. ventilation port, 8. ventilation channel, 9. PTC heating block. DETAILED DESCRIPTION

[0018] The essential features of the present utility model are further described below in conjunction with the accompanying drawings and specific implementation methods.

[0019] like Figure 1 and 2 A fan with double blowing channels is shown, including a housing 2 with a volute cavity therein and a fan blade 3 arranged in the volute cavity, the fan blade 3 rotates and drives the airflow to flow along the circumference of the volute cavity, the circumference of the volute cavity is provided with two blowing channels 4 connected to the indoor space, the blowing channels 4 are arranged in a centrally symmetrical manner with the axis of the volute 1 as the center, the fan blade 3 rotates and drives the airflow to be evenly dispersed into each blowing channel 4, so as to form a linear air outlet area on the bottom surface of the housing 2. By arranging the blowing channels 4 arranged in a centrally symmetrical manner on both sides of the volute 1, a linear air outlet area can be formed on the bottom surface of the housing 2, which is suitable for ventilation appliances with linear air outlets 5, and by shortening the distance between the air outlet 5 and the volute 1, it is ensured that each area of ​​the linear air outlet area has a balanced air volume, thereby improving the user experience.

[0020] In actual operation, the periphery of the volute 1 is provided with a ventilation channel 8 connected to the outdoor space, the axes of the blowing channel 4 and the ventilation channel 8 are arranged tangentially along the periphery of the volute cavity in opposite directions, and the fan blades 3 switch the airflow path between the blowing channel 4 and the ventilation channel 8 by switching between forward and reverse bidirectional rotation. The axes of the blowing channel 4 and the ventilation channel 8 are arranged tangentially along the periphery of the volute cavity in opposite directions, and the fan blades 3 switch the airflow to the blowing channel 4 or the ventilation channel 8 by switching between forward and reverse bidirectional rotation, thereby switching the airflow path in the fan, which simplifies the structure, facilitates production, reduces equipment costs, and effectively reduces the volume of the housing 2, improving the user experience.

[0021] When in use, the fan blade 3 is driven by the motor to rotate forward and reverse, thereby switching the airflow path between the blowing mode of exhausting through the blowing channel 4 and the ventilation mode of exhausting through the ventilation channel 8. Specifically, one end of the blowing channel 4 is tangentially arranged counterclockwise along the periphery of the volute 1, and the end of the ventilation channel 8 is tangentially arranged clockwise along the periphery of the volute 1. When the fan blade 3 rotates in the counterclockwise direction, the fan blade 3 drives the airflow to flow counterclockwise along the volute 1 and pour into the blowing channel 4. When the fan blade 3 rotates in the clockwise direction, the fan blade 3 drives the airflow to flow clockwise along the volute 1 and pour into the ventilation channel 8, so that the airflow can switch the flow path by adjusting the rotation direction of the fan blade 3, effectively simplifying the structure, facilitating assembly and use, and reducing equipment costs.

[0022] In actual operation, both ends of the bottom surface of the shell 2 are provided with air outlets 5, and the blowing channel 4 is connected between the volute 1 and the corresponding air outlet 5, so that the airflow in the volute 1 flows through the blowing channel 4 and the corresponding air outlet 5 and is then transported to the indoor space. The blowing channel 4 receives the airflow from the volute 1 and transports it to the air outlet 5, so that the airflow is input into the indoor space through the air outlet 5. The axis of the blowing channel 4 is arranged in an arc shape, one end of the axis of the blowing channel 4 is arranged tangentially to the periphery of the volute 1, and the other end is bent outward and exposed downward through the corresponding air outlet 5 to reduce the wind resistance of the airflow when it flows through the blowing channel 4. The inner wall of the blowing channel 4 is smooth, which effectively reduces the wind resistance, thereby increasing the airflow velocity and the conveyed air volume.

[0023] In actual operation, the air outlet 5 is in the shape of a long strip and is arranged along the length direction of the housing 2 to form the linear air outlet area. The air outlet 5 has a relatively small width, which guides the airflow, ensuring that the airflow can smoothly pass through the gaps reserved between the decorative panels and be transported to the indoor space, making it convenient to use with existing large-size decorative panels, which not only improves the decorative aesthetics by improving the matching, but also ensures that the airflow transport efficiency meets the use requirements.

[0024] In actual operation, the center lines of the air outlets 5 overlap and pass through the axis of the volute 1, so that the airflow in the volute 1 is evenly distributed to each blowing channel 4. The air outlet 5 is used to discharge the airflow, and the air inlet is arranged at the bottom of the volute 1. The air inlet facilitates the volute 1 to extract the air in the indoor space, so that the air in the indoor space can circulate through the fan. The air outlet 5 and the air inlet are arranged on the same straight line, which is convenient for use with linear electrical appliances.

[0025] In actual operation, an air guide bracket 6 with a PTC heating block 9 is provided at the air outlet 5. The air guide bracket 6 includes an air receiving portion connected to the end of the air blowing channel 4 and an air guide portion provided with the PTC heating block 9. The air receiving portion receives the airflow from the air blowing channel 4 and heats it through the air guide portion before discharging it externally after it turns to flow downward. The air receiving portion is inserted into the port of the air blowing channel 4 to effectively receive the airflow from the air blowing channel 4. After the airflow turns through the air receiving portion, it flows through the PTC heating block 9 to form hot air, and the hot air is transported to the indoor space through the air outlet 5 to increase the temperature of the indoor space.

[0026] In actual operation, the side wall of the housing 2 is provided with a ventilation port 7, one end of the ventilation channel 8 is tangentially arranged at the periphery of the volute 1, and the other end is connected to the ventilation port 7. The ventilation outlet 5 is connected to the outside space through a hose, so that the fan can exhaust the indoor air, thereby keeping the indoor air fresh.

[0027] In actual operation, the blowing channel 4, the volute 1 and the ventilation channel 8 are located in the same horizontal plane, which is beneficial to reducing the thickness of the shell 2, thereby reducing the size requirements for the indoor top space, facilitating hiding and installation, and can also effectively reduce the airflow flow resistance and improve the airflow delivery efficiency by avoiding vertical bending in the airflow flow path.

[0028] In actual operation, a linear air outlet area is set up to be used in conjunction with a large-size decorative panel. The large-size decorative panel is a square decorative panel with a side length of 30 cm or 60 cm. Adjacent decorative panels can be enclosed to form a long strip of installation gap, which facilitates the linear air outlet area to be exposed through the installation gap and realize air circulation, which should be regarded as a specific embodiment of the present utility model.

Claims

1. A fan with double blowing channels, comprising a housing (2) with a volute cavity therein and a fan blade (3) arranged in the volute cavity, wherein the fan blade (3) rotates and drives the airflow to flow along the circumference of the volute cavity, characterized in that: Two blowing channels (4) communicating with the indoor space are provided at the periphery of the volute cavity. The blowing channels (4) are arranged in a centrally symmetrical manner with the axis of the volute (1) as the center. The fan blades (3) rotate and drive the airflow to be evenly dispersed into each blowing channel (4) to form a linear air outlet area on the bottom surface of the shell (2).

2. A fan with double blowing channels according to claim 1, characterized in that: Air outlets (5) are provided at both ends of the bottom surface of the shell (2), and the blowing channel (4) is connected between the volute (1) and the corresponding air outlet (5), so that the airflow in the volute (1) flows through the blowing channel (4) and the corresponding air outlet (5) and is then transported to the indoor space.

3. A fan with double blowing channels according to claim 2, characterized in that: The axis of the blowing channel (4) is arranged in an arc shape, one end of the axis of the blowing channel (4) is arranged tangentially to the periphery of the volute (1), and the other end is bent outwards and exposed downwards through the corresponding air outlet (5) to reduce the wind resistance of the air flow when it flows through the blowing channel (4).

4. The fan with double blowing channels according to claim 2, characterized in that: The air outlet (5) is in the shape of an elongated strip and is arranged along the length direction of the shell (2) to form the linear air outlet area.

5. The fan with double blowing channels according to claim 2, characterized in that: The center lines of the air outlets (5) overlap with each other and pass through the axis of the volute (1), so that the airflow in the volute (1) is evenly distributed to each blowing channel (4).

6. The fan with double blowing channels according to claim 2, characterized in that: An air guide bracket (6) with a PTC heating block (9) is provided at the air outlet (5).

7. The fan with double blowing channels according to claim 6, characterized in that: The air guide bracket (6) comprises an air receiving portion connected to the end of the air blowing channel (4) and an air guide portion on which a PTC heating block (9) is arranged. The air receiving portion receives airflow from the air blowing channel (4) and heats the air through the air guide portion and discharges the air after the airflow turns to flow downward.

8. A fan with double blowing channels according to any one of claims 1 to 7, characterized in that: The volute (1) is provided with a ventilation channel (8) on the periphery thereof which is connected to the outdoor space. The axes of the blowing channel (4) and the ventilation channel (8) are arranged tangentially along the periphery of the volute cavity in opposite directions to each other. The fan blades (3) achieve switching of the airflow path between the blowing channel (4) and the ventilation channel (8) by switching between forward and reverse bidirectional rotations.

9. The fan with double blowing channels according to claim 8, characterized in that: The side wall of the shell (2) is provided with a ventilation port (7), one end of the ventilation channel (8) is tangentially arranged with the periphery of the volute (1), and the other end is connected with the ventilation port (7).

10. The fan with double blowing channels according to claim 8, characterized in that: The blowing channel (4), the volute (1) and the ventilation channel (8) are located in the same horizontal plane.

Images