A double-blade cooling and heating circulation fan

Abstract

The present invention discloses a double-blade cooling and heating circulation fan, comprising a shell, an air outlet grille located at the front end outlet of the shell, and an air inlet grille located at the rear end inlet of the shell, wherein a first fan blade, an air guide channel, a heating device, and a driving motor are arranged in the shell, wherein the first fan blade is arranged at a position between the air outlet of the air guide channel and the air outlet grille, wherein the driving shaft of the driving motor passes through the heating device, and after extending from the air guide channel, forms a driving connection with the first fan blade, and is characterized in that the driving motor is arranged in the air guide channel, and the air guide channel is also provided with a second fan blade for blowing air toward the heating device, and the second fan blade is arranged between the driving motor and the air inlet grille. The heating element in the present invention can adopt a dense heating element, such as a double-blade cooling and heating circulation fan adopting PTC (positive temperature coefficient thermistor) as the heating medium, to ensure sufficient user experience.

Description

Technical Field

[0001] The invention relates to the field of air conditioning equipment for indoor air circulation, and in particular to a double-blade cooling and heating circulation fan. Background Art

[0002] Air conditioning equipment used for indoor air circulation (hereinafter referred to as circulation fan) is a household appliance that makes the indoor air temperature and humidity evenly distributed. Using this appliance allows people to live and reside in a comfortable indoor environment for a long time, and it has become a must-have appliance for the family.

[0003] The existing circulating fan technology is an electric fan that blows cold air. It uses axial flow blades, and a circular air duct is set around the radial front part of the blade, or a part of the cylindrical shell is used as the air duct. The shell set behind the blade is provided with a grille or mesh-shaped air inlet. When the motor is powered on, the blade rotates at high speed, and the air is sucked in from the air inlet and then sent out from the air outlet through the air duct. Due to the function of the air duct, a longer air supply distance is guaranteed, and the swing head function is added to realize the circulation adjustment of the surrounding air.

[0004] Chinese patent document CN 206903897 discloses a natural wind / warm wind dual-purpose circulation fan, which adopts an air guide ring set behind the fan blades. To ensure the ventilation effect, a ring-shaped metal electric heating wire heating component is fixedly installed in the air guide ring. When warm air is needed, cold air is sucked in from the air inlet of the shell and flows through the heating element component for heating and then sent out from the air outlet. The air flow mode during cold air is the same as that during warm air, but the heating element component does not work, thereby realizing the cold air and warm air functions. However, the metal heating wire is easy to absorb oxygen when heated, turns red when the air intake is uneven, has the disadvantages of low value and short life.

[0005] If a PTC heating element with dense aluminum sheets and good heat dissipation performance is used, the air volume of warm and cold air will be greatly limited under the same fan blade diameter. Therefore, it is necessary to increase the fan blade diameter and drive power to achieve normal air volume, which consumes a lot of energy. Summary of the invention

[0006] The purpose of the present invention is to provide a solution to the technical problems that the metal heating wire used as the heating element in the existing cooling and heating circulation fan has a short life, and the air outlet effect experience is not good when using intensive heating elements such as PTC. To this end, the present invention provides a double-blade cooling and heating circulation fan.

[0007] In order to achieve the above object, the present invention adopts the following technical scheme:

[0008] A double-blade cooling and heating circulation fan comprises a shell, an air outlet grille located at the front end outlet of the shell and an air inlet grille located at the rear end inlet of the shell, wherein a first fan blade, an air guide channel, a heating device and a driving motor are arranged in the shell, wherein the heating device is arranged at the air outlet position close to the air guide channel, wherein the first fan blade is arranged at a position between the air outlet of the air guide channel and the air outlet grille, wherein the driving shaft of the driving motor passes through the heating device and extends out of the air guide channel to form a driving connection with the first fan blade, wherein the driving motor is arranged in the air guide channel, wherein the air guide channel is further provided with a second fan blade for blowing air toward the heating device, and wherein the second fan blade is arranged between the driving motor and the air inlet grille.

[0009] Preferably, the second fan blade is an independently controlled axial flow fan blade, the rear end of the air guide channel is arranged close to the rear end of the shell, and the second fan blade is fixed on the air inlet grille.

[0010] Further preferably, an air inlet grid or mesh air inlet hole connected to the first fan blade is provided on the shell located between the first fan blade and the air outlet of the air guide channel.

[0011] Or further preferably, an air inlet grid or mesh air inlet hole connected to the first fan blade is provided on the shell located at the rear end of the first fan blade.

[0012] The air guide channel is an annular air channel, which includes a cylindrical ventilation channel and a conical ventilation channel with a conical closing structure, and the heating device is arranged at the closing of the conical ventilation channel.

[0013] The shell corresponding to the conical ventilation duct is provided with an air inlet grid or a mesh air inlet hole.

[0014] Preferably, the heating device is a PTC heating element, a heating element bracket is provided at the air outlet position of the air guide channel, and the heating device and the heating element bracket are detachably fixed by snap connection.

[0015] The PTC heating element is one piece or a plurality of PTC heating elements arranged side by side at the air outlet end of the air guide channel.

[0016] The technical solution of the present invention has the following advantages:

[0017] A. The present invention sets an air guide channel in the circulation fan, sets a second fan blade at the rear air inlet of the air guide channel, and sets the second fan blade behind the heating device near the air outlet of the air guide channel. The setting of the second fan blade significantly improves the penetration of the incoming air into the heating device, and further dissipates the heat of the warm air with the cooperation of the first fan blade, so that the hot air can be quickly diffused into the environment. The heating element in the present invention can adopt a dense heating element, such as a double-fan blade heating and cooling circulation fan using PTC (positive temperature coefficient thermistor) as the heating medium, to ensure sufficient user experience.

[0018] B. The present invention adopts an air guide channel structure that combines a cylindrical ventilation duct and a conical ventilation duct with a conical closing structure. The PTC heating element is arranged at the position of the conical closing structure, and the second fan blade is located at the position of the cylindrical ventilation duct. The second fan blade using axial flow fan blades can collect a larger amount of wind entering from the air inlet of the cylindrical ventilation duct. After passing through the conical ventilation duct, a stronger wind force is formed to pass through the heating device with strong penetrating power. The rotation of the first blade will also increase the penetrating effect of the wind, and at the same time absorb the radial wind coming in from the air inlet grid or the mesh air inlet hole on the shell. This part of the wind will also participate in the warm air flow, and after being evenly mixed by the first fan blade, it will be discharged together from the air outlet grid to maintain the air outlet volume of the air outlet grid.

[0019] C. The use of PTC heating element significantly improves the product value and product life. The double-blade air supply structure has a simple structure, which improves the air supply capacity of the product and enhances the user experience. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] In order to more clearly illustrate the specific embodiments of the present invention, the drawings required for use in the specific embodiments will be briefly introduced below. Obviously, the drawings described below are some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0021] Figure 1 This is an exploded axonometric diagram of a double-blade cooling and heating circulation fan;

[0022] Figure 2 It is a schematic diagram of the cross-sectional structure of a double-blade cooling and heating circulation fan;

[0023] Figure 3 It is a schematic diagram of a partial cross-section of the air guide channel;

[0024] Figure 4 This is a schematic diagram of the installation axonometric view of a PTC heating element;

[0025] Figure 5 It is an axonometric diagram of a circular air duct;

[0026] Figure 6This is an axonometric diagram of the installation of two PTC heating elements.

[0027] The following are marked in the figure:

[0028] 1-housing; 2-air outlet grille; 3-air inlet grille; 4-first fan blade

[0029] 5-air guide channel, 5a-air inlet, 5b-air outlet

[0030] 51-cylindrical ventilation duct, 52-conical ventilation duct

[0031] 6-Heating device

[0032] 61-through hole, 62-through slot

[0033] 7-Drive motor

[0034] 71-drive shaft, 72-motor bracket

[0035] 8-second fan blade; 9-air inlet grid or mesh air inlet hole; 10-heating element bracket; 20-support. DETAILED DESCRIPTION

[0036] The technical solution of the present invention will be described clearly and completely below in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0037] like Figure 1 , Figure 2 and Figure 5 As shown, the present invention provides a double-blade cooling and heating circulation fan, comprising a support 20, a shell 1, an air outlet grille 2 located at the front end outlet of the shell 1 and an air inlet grille 3 located at the rear end inlet of the shell 1, a first fan blade 4, an air guide channel 5, a heating device 6 and a driving motor 7 are arranged in the shell 1, the heating device 6 is arranged at the air outlet 5b position close to the air guide channel 5, the first fan blade 4 is arranged at a position between the air outlet 5b of the air guide channel 5 and the air outlet grille 2, wherein the motor bracket 71 is fixed in the air guide channel 5 for fixing the driving motor 7, wherein the driving shaft 71 of the driving motor 7 passes through the heating device 6, and extends out of the air guide channel 5 to form a driving connection with the first fan blade 4, the driving motor 7 is arranged in the air guide channel 5, and a second fan blade 8 for blowing air toward the heating device 6 is also arranged in the air guide channel 5, and the second fan blade 8 is arranged between the driving motor 7 and the air inlet grille 3, the support 20 is fixedly connected to the shell 1, and the air outlet angle of the shell 1 can be adjusted. The second fan blade 8 here is preferably an independently controlled axial flow fan blade. The air inlet 5 a of the air guide channel 5 is arranged close to the rear end of the shell 1 , and the second fan blade 8 is fixed on the air inlet grille 3 .

[0038] The heating device 6 in the present invention is preferably a PTC heating element. Of course, a common or other intensive heating element structure can also be used. A heating element bracket 10 is arranged at the air outlet 5b of the air guide channel 5. Figure 3 and Figure 4 As shown, the heating device 6 and the heating element bracket 10 are detachably fixed by snapping.

[0039] When warm air is needed, the second fan blade 8 and the PTC heater work, and air is sucked in from the outside of the air inlet grille 3 of the housing 1, and after being heated by the PTC heater set at the air outlet of the air guide channel 5, it is blown out from the air outlet grille 2 of the housing 1; if cold air is needed, the PTC heater stops working. The use of the PTC heater significantly improves the product value and product life; the double fan blade structure is adopted, in which the first fan blade 4 is used to dissipate heat for the PTC heater, which improves the wind's penetration of the PTC heater, allowing the hot air to quickly diffuse into the environment, improving the user experience.

[0040] In order to further increase the air supply volume, the present invention also provides an air inlet grid or mesh air inlet hole 9 connected to the first fan blade 4 at a local position of the shell between the first fan blade 4 and the air outlet 5a of the air guide channel 5. While increasing the penetration of the PTC heating element, the first fan blade 4 further absorbs the radial wind on the shell to ensure the air outlet experience. When the PTC heating element is working, this part of the radial wind is mixed with the warm air and discharged after being mixed by the first fan blade.

[0041] Of course, the shell 1 at the rear end of the first fan blade 4 may be provided with an air inlet grid or mesh air inlet hole 9 connected to the first fan blade 4, while no such air inlet grid or mesh air inlet hole is provided on the shell directly above the first fan blade 4.

[0042] like Figure 3 As shown, the air guide channel 5 in the present invention is preferably an annular air channel, and of course, an annular air channel with a conical closing structure, specifically including a cylindrical ventilation channel 51 and a conical ventilation channel 52 with a conical closing structure, wherein the PTC heating element is arranged at the closing of the conical ventilation channel 52, the motor bracket 72 is fixed at the connection position between the cylindrical surface and the conical surface, the second fan blade is located in the cylindrical ventilation channel behind the motor bracket 72, and the second fan blade is fixed at the middle position of the air inlet grille 3. At this time, the housing 1 corresponding to the conical ventilation channel 52 is provided with an air inlet grid or a mesh air inlet hole 9, which can realize the direct input of radial wind of the housing, greatly improving the air supply efficiency.

[0043] The PTC heating element used in the present invention can be a whole block structure, such as Figure 4 As shown in the structure, a through hole 61 is provided on the PTC heating element, and the driving shaft 71 passes through the through hole 61 and forms a driving connection with the first fan blade 4.

[0044] Of course, a structure in which multiple PTC heating elements are arranged side by side at the air outlet of the air guide channel 5 can also be used, such as Figure 6 As shown, two PTC heating elements are arranged side by side, and a through groove 62 is formed between the two PTC heating elements for the driving shaft 71 to pass through.

[0045] The PTC heating element and the heating element bracket are fixed by a clamping connection, which is convenient for replacing the PTC heating element. Figure 4 As shown, no further description is given here.

[0046] The axial flow blades are installed at the rear end of the housing 1, and the annular air duct inlet 5a of the air guide channel 5 is fixedly installed in the housing 1 opposite to the axial flow blades, so that the axial flow blades are placed at the air inlet of the annular air duct. The first blade 4 is installed on the drive shaft 71 of the drive motor 7, and the front end of the housing 1 is covered with the air outlet grille 2. The housing 1 is then rotatably installed on the support 20 to form a double-blade cooling and heating circulation fan, such as Figure 2 .

[0047] When warm air is needed, the axial flow fan blades and the PTC heating element work, and air is sucked in from the air inlet hole set at the rear end of the shell. After being heated by the PTC heating element set at the air outlet of the annular air duct, the air is blown out from the air outlet grille 2 at the front end of the shell by the first fan blade. If cold air is needed, the PTC heating element stops working. In order to ensure the ventilation effect of the PTC heating, the axial flow fan blades are set at the air inlet of the annular air duct to improve the wind's penetration of the PTC. The use of the PTC heating element significantly improves the product value and product life. At the same time, the double fan blade structure is adopted, which has a simple structure, improves the air supply capacity of the product, and improves the user experience.

[0048] Obviously, the above embodiments are merely examples for the purpose of clear explanation, and are not intended to limit the implementation methods. For those skilled in the art, other different forms of changes or modifications can be made based on the above description. It is not necessary and impossible to list all the implementation methods here. However, the obvious changes or modifications derived therefrom are still within the scope of protection of the present invention.

Claims

1. A double-blade cooling and heating circulation fan, comprising a housing (1), an air outlet grille (2) located at a front end outlet of the housing (1) and an air inlet grille (3) located at a rear end inlet of the housing (1); a first fan blade (4), an air guide channel (5), a heating device (6) and a driving motor (7) are arranged in the housing (1); the heating device (6) is arranged at a position close to the air outlet of the air guide channel (5); the first fan blade (4) is arranged at a position between the air outlet of the air guide channel (5) and the air outlet grille (2); a driving shaft (71) of the driving motor (7) passes through the heating device (6), extends out of the air guide channel (5) and forms a driving connection with the first fan blade (4); and the fan is characterized in that: The driving motor (7) is arranged in the air guide channel (5), and the air guide channel (5) is also provided with a second fan blade (8) for blowing air toward the heating device (6), and the second fan blade (8) is arranged between the driving motor (7) and the air inlet grille (3); An air inlet grid or mesh-shaped air inlet hole (9) connected to the first fan blade (4) is provided on the housing (1) between the first fan blade (4) and the air outlet of the air guide channel (5); The second fan blade (8) is an independently controlled axial flow fan blade, the rear end of the air guide channel (5) is arranged close to the rear end of the housing (1), and the second fan blade (8) is fixed on the air inlet grille (3); The air guide channel (5) is an annular air channel, comprising a cylindrical ventilation channel (51) and a conical ventilation channel (52) having a conical closing structure, and the heating device (6) is arranged at the closing portion of the conical ventilation channel (52).

2. The double-blade cooling and heating circulation fan according to claim 1, characterized in that: An air inlet grid or mesh-shaped air inlet hole (9) connected to the first fan blade (4) is provided on the housing (1) at the rear end of the first fan blade (4).

3. The double-blade cooling and heating circulation fan according to claim 1, characterized in that: The shell (1) corresponding to the conical ventilation duct (52) is provided with an air inlet grid or a mesh-shaped air inlet hole (9).

4. The double-blade cooling and heating circulation fan according to any one of claims 1 to 3, characterized in that: The heating device (6) is a PTC heating element, a heating element bracket (10) is provided at the air outlet of the air guide channel (5), and the heating device (6) and the heating element bracket (10) are detachably fixed by snap-fitting.

5. The double-blade cooling and heating circulation fan according to claim 4, characterized in that: The PTC heating element is one piece or a plurality of PTC heating elements arranged side by side at the air outlet end of the air guide channel (5).

Images