Fan structure of warm air blower

Abstract

The utility model discloses a fan structure of a fan heater and belongs to the technical field of fan heaters, the fan structure of the fan heater comprises a shell and a rear cover fixed on the back of the shell, a volute is installed in the shell, a brushless direct current motor and a turbofan are installed in the volute, the turbofan is fixedly installed on the periphery of an output shaft of the brushless direct current motor, and the brushless direct current motor is connected with the rear cover. An air outlet port of the volute is fixedly connected with a connecting seat, the bottom of the connecting seat is fixedly connected with a mounting frame, a PTC heating block is clamped in the mounting frame, the principle that a brushless direct current motor, a turbofan and the volute are combined can be adopted, airflow can be more efficiently absorbed and exhausted by means of the structure of the turbofan, and the heating effect is better. By means of the design that the section of the volute is in a gradually-changing curve shape, resistance and loss of airflow can be reduced, the airflow is accelerated in the volute, the performance of the fan is improved, and the problem that the air speed of an air outlet of a traditional fan heater is low is solved.

Description

Technical Field

[0001] The utility model relates to the technical field of warm air blowers, and more specifically, to a blower structure of a warm air blower. Background Art

[0002] A warm air blower is a combined unit composed of a ventilator, a motor and an air heater. It is applicable to various types of workshops. When the air does not contain dust and flammable or explosive gases, it can be used for circulating air heating.

[0003] Based on the above, the inventor found that: basically all the existing warm air blowers on the market generate hot air by the principle of a DC fan directly blowing on a PTC. Its wind speed is low, and users need to use it at a close distance when using it, resulting in a poor user experience. Moreover, the low wind speed easily causes the heat to not be blown out, so the PTC power fails quickly, and the ideal hot air outlet effect cannot be achieved. At the same time, the too low wind speed is not conducive to heat dispersion, resulting in the dangerous situation of melting products or baking the directly blown object when the customer uses it improperly. Therefore, in view of this, the existing structure is studied and improved to provide a blower structure of a warm air blower, in order to achieve a more practical value purpose. Summary of the Invention

[0004] Aiming at the problems existing in the prior art, the purpose of the utility model is to provide a blower structure of a warm air blower. It can adopt the principle of the combination of a brushless DC motor, a scroll fan and a volute. Relying on the structure of the scroll fan, it can absorb and discharge air more efficiently. By using the design that the cross-section of the volute is a gradually changing curve, the resistance and loss of the air flow can be reduced, so that the air flow is accelerated in the volute, improving the performance of the blower and solving the problem of low air outlet wind speed of the traditional warm air blower.

[0005] To solve the above problems, the utility model adopts the following technical solutions.

[0006] A blower structure of a warm air blower includes a housing and a rear cover fixed to the back of the housing. A volute is installed inside the housing. A brushless DC motor and a scroll fan are installed inside the volute, and the scroll fan is fixedly installed on the outer periphery of the output shaft of the brushless DC motor. A connecting seat is fixedly connected to the air outlet port of the volute. An installation frame is fixedly connected to the bottom of the connecting seat. A PTC heating block is clamped inside the installation frame. A grid frame is fixedly connected to the inner bottom wall of the installation frame and is located below the PTC heating block. A wind gathering seat is fixedly connected to the bottom of the installation frame. The bottom of the housing is provided with an opening, and an air outlet assembly is installed at the opening position.

[0007] Further, the volute includes an upper volute and a lower volute, and the upper volute and the lower volute are fixed by screws. The scroll fan is arranged between the upper volute and the lower volute. The brushless DC motor is fixedly installed on the upper volute. The output shaft of the brushless DC motor extends into the upper volute and is fixedly connected to the scroll fan.

[0008] Further, the air outlet assembly includes a bottom plate fixed at the opening at the bottom of the housing. An air outlet hole is formed at the center of the bottom plate, and a louver is rotatably connected to the inner side of the air outlet hole. The bottom plate and the bottom of the air collecting seat are fixedly connected by a connecting member.

[0009] Further, a control panel is installed on the front of the housing, and a handle is integrally formed at the bottom of the housing.

[0010] Further, a plurality of air inlet holes are formed at the middle position on the back of the rear cover.

[0011] Further, two symmetrically arranged fixing seats are fixedly connected to the top position on the back of the rear cover.

[0012] Further, a control main board and a power module are installed inside the housing. The control main board is electrically connected to the brushless DC motor, the PTC heating block, the control panel and the power module through wires respectively.

[0013] Compared with the prior art, the advantages of the present utility model are as follows:

[0014] (1) In this solution, by adopting the principle of the combination of a brushless DC motor, a scroll fan and a volute, relying on the structure of the scroll fan, air flow can be absorbed and discharged more efficiently. At the same time, the volute can guide the air flow inhaled by the scroll fan to the air outlet of the product to increase the wind speed. The curve shape of its cross-section can also reduce the resistance and loss of the air flow, improve the performance of the fan, greatly improve the operation efficiency of the heater, as well as the stability and safety during high-speed operation, and achieve an ideal hot air effect.

[0015] (2) In this solution, through the setting of the grid frame, when the air flow passes through, the pores on the grid frame can break the high-speed air flow, making the air outlet more uniform, reducing the instability of the air flow, improving the comfort level, and at the same time ensuring the uniform dispersion of heat. The setting of the louver can, when the air flow is discharged, rely on the louver to adjust the direction to achieve the reasonable distribution and adjustment of the air flow. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 is a schematic diagram of the overall structure of the present utility model;

[0017] Figure 2 is for the present utility model Figure 1 of the rear view structure diagram;

[0018] Figure 3 For the Figure 1 split structure schematic diagram of the present utility model;

[0019] Figure 4 For the split structure schematic diagram of the volute position of the present utility model;

[0020] Figure 5 For the structural split schematic diagram of the volute air outlet port position of the present utility model.

[0021] Explanation of the reference numerals in the figure:

[0022] 1. Outer shell;

[0023] 2. Volute;

[0024] 3. Brushless DC motor;

[0025] 4. Scroll fan;

[0026] 5. Connecting seat;

[0027] 6. Mounting bracket;

[0028] 7. PTC heating block;

[0029] 8. Grid frame;

[0030] 9. Air collecting seat;

[0031] 10. Air outlet assembly; 1001. Bottom plate; 1002. Louver blades;

[0032] 11. Connector;

[0033] 12. Control panel;

[0034] 13. Handle;

[0035] 14. Air inlet hole;

[0036] 15. Fixed seat;

[0037] 16. Control main board;

[0038] 17. Rear cover;

[0039] 18. Power module. Detailed implementation manners

[0040] Next, the technical solutions in the embodiments of the present utility model will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present utility model; obviously, the described embodiments are only a part of the embodiments of the present utility model, rather than all the embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present utility model. Embodiment

[0041] Please refer to Figures 1-5 , a blower structure of a heater, including a housing 1 and a rear cover 17 fixed to the back of the housing 1. A volute 2 is installed inside the housing 1, a brushless DC motor 3 and a scroll fan 4 are installed inside the volute 2, and the scroll fan 4 is fixedly installed on the outer periphery of the output shaft of the brushless DC motor 3. A connection seat 5 is fixedly connected to the air outlet port of the volute 2, an installation frame 6 is fixedly connected to the bottom of the connection seat 5, a PTC heating block 7 is clamped inside the installation frame 6, a grid frame 8 is fixedly connected to the inner bottom side wall of the installation frame 6, and the grid frame 8 is located below the PTC heating block 7. A wind gathering seat 9 is fixedly connected to the bottom of the installation frame 6. The bottom of the housing 1 is provided with an opening, and an air outlet assembly 10 is installed at the opening position.

[0042] Refer to Figure 4 , the volute 2 includes an upper volute and a lower volute, and the upper volute and the lower volute are fixed by screws. The scroll fan 4 is arranged between the upper volute and the lower volute, the brushless DC motor 3 is fixedly installed on the upper volute, and the output shaft of the brushless DC motor 3 extends into the upper volute and is fixedly connected to the scroll fan 4.

[0043] Refer to Figure 5 , the air outlet assembly 10 includes a bottom plate 1001 fixed to the opening at the bottom of the housing 1. An air outlet hole is opened at the center position of the bottom plate 1001, and a louver 1002 is rotatably connected to the inner side of the air outlet hole. The bottom plate 1001 and the bottom of the wind gathering seat 9 are fixedly connected by a connecting member 11.

[0044] Refer to Figure 2 , a control panel 12 is installed on the front of the housing 1, and a handle 13 is integrally formed at the bottom of the housing 1.

[0045] Refer to Figure 2 , a plurality of air inlet holes 14 are opened at the middle position of the back of the rear cover 17.

[0046] Refer to Figure 2 , two symmetrically arranged fixing seats 15 are fixedly connected to the top position of the back of the rear cover 17.

[0047] Refer to Figure 3 , a control main board 16 and a power module 18 are installed inside the housing 1. The control main board 16 is electrically connected to the brushless DC motor 3, the PTC heating block 7, the control panel 12 and the power module 18 through wires respectively.

[0048] Working principle: Start the brushless DC motor 3 to make the fan 4 rotate inside the volute 2. At this time, relying on the structure of the fan 4, the air flow is efficiently absorbed and discharged. The cross-section of the volute 2 is a gradually changing curve, gradually expanding from the inlet to the outlet of the fan 4. Thus, the volute 2 can guide the air flow inhaled by the fan 4 to the product air outlet to increase the wind speed, reduce the resistance and loss of the air flow, improve the performance of the heater, greatly improve the operation efficiency of the heater and the stability and safety during high-speed operation, achieving an ideal hot air effect. The air flow is heated after passing through the PTC heating block 7, and the heated air flow passes through the grid frame 8. When the air flow passes through, the pores on the grid frame 8 can disrupt the high speed, making the air outlet more uniform, reducing the instability of the air flow, improving the comfort, and at the same time ensuring the uniform dispersion of heat. Finally, it passes through the louver 1002, and the direction is adjusted by rotating the louver 1002 to achieve the reasonable distribution and adjustment of the air flow.

[0049] Finally, it should be noted that in the description of the present invention, it should be noted that the orientation or positional relationship indicated by the terms "vertical", "upper", "lower", "horizontal", etc. is based on the orientation or positional relationship shown in the drawings, and is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be construed as a limitation to the present invention.

[0050] In the description of the present invention, it should also be noted that unless otherwise clearly specified and limited, the terms "set", "installed", "connected", "connected" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection, an electrical connection; it can be directly connected, or indirectly connected through an intermediate medium, and it can be the communication inside two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0051] The above is only the preferred specific embodiment of the present invention; however, the protection scope of the present invention is not limited thereto. Any person skilled in the art within the technical scope disclosed by the present invention, according to the technical solution of the present invention and its improved concept, makes an equivalent substitution or change, and should be covered by the protection scope of the present invention.

Claims

1. A blower structure for a warm air blower, comprising a housing (1) and a rear cover (17) fixed to the back of the housing (1), characterized in that: Inside the housing (1), a volute (2) is installed. Inside the volute (2), a brushless DC motor (3) and a vortex fan (4) are installed, and the vortex fan (4) is fixedly installed on the outer periphery of the output shaft of the brushless DC motor (3). The air outlet port of the volute (2) is fixedly connected to a connection base (5). The bottom of the connection base (5) is fixedly connected to a mounting frame (6). A PTC heating block (7) is snap-fitted inside the mounting frame (6). The inner bottom side wall of the mounting frame (6) is fixedly connected to a grid frame (8), and the grid frame (8) is located below the PTC heating block (7). The bottom of the mounting frame (6) is fixedly connected to a wind collecting base (9). The bottom of the housing (1) is open, and an air outlet assembly (10) is installed at the open position.

2. The blower structure of a heater according to claim 1, wherein: The volute (2) includes an upper volute and a lower volute, and the upper volute and the lower volute are fixed by screws. The vortex fan (4) is arranged between the upper volute and the lower volute. The brushless DC motor (3) is fixedly installed on the upper volute. The output shaft of the brushless DC motor (3) extends into the upper volute and is fixedly connected to the vortex fan (4).

3. The blower structure of a warm air blower according to claim 1, characterized in that: The air outlet assembly (10) includes a bottom plate (1001) fixed at the bottom opening of the housing (1). An air outlet hole is opened at the center position of the bottom plate (1001), and a louver (1002) is rotatably connected inside the air outlet hole. The bottom plate (1001) and the bottom of the wind collecting base (9) are fixedly connected by a connecting member (11).

4. The blower structure of a warm air blower according to claim 1, characterized in that: A control panel (12) is installed on the front of the housing (1), and a handle (13) is integrally formed at the bottom of the housing (1).

5. The blower structure of a heater according to claim 1, wherein: A plurality of air inlet holes (14) are opened at the middle position of the back surface of the rear cover (17).

6. The blower structure of a warm air blower according to claim 1, characterized in that: Two symmetrically arranged fixing seats (15) are fixedly connected to the top position of the back surface of the rear cover (17).

7. The blower structure of a heater fan according to claim 1, characterized in that: A control main board (16) and a power module (18) are installed inside the housing (1). The control main board (16) is electrically connected to the brushless DC motor (3), the PTC heating block (7), the control panel (12), and the power module (18) respectively through wires.

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