A cooling and heating dual-purpose fan

Abstract

The present invention relates to a cooling and heating dual-purpose fan, comprising a fan blade, and a power output device for supplying power to a self-constant temperature PTC heating element to generate heat while driving the fan blade to rotate so as to generate hot air; the fan blade comprises a heat exchange body formed by a self-constant temperature PTC heating element or a self-constant temperature PTC heating element arranged on a fan blade body, and blows out hot air after being powered on and rotated. The present invention utilizes the self-constant temperature PTC heating element as a heat source, and further combines it with the function of the fan blade to form a heat exchange body that can rotate to emit hot air. Compared with a traditional dual-purpose fan composed of a heating element, a heat sink, a temperature controller, and a fan blade, the present invention simplifies the overall structure while integrating the four functions into one, reduces the overall volume, occupies less space, and is convenient for transportation and storage; and more importantly, effectively avoids heat loss, improves heat transfer efficiency, and has a significant heating effect.

Description

Technical Field

[0001] The invention relates to the field of fans, in particular to a cooling and heating dual-purpose fan. Background Art

[0002] There are many types of fans on the market, whether they are table fans, floor fans or portable small fans, their functions and features are relatively simple and limited, and they can only play the role of cooling air in summer. In winter, when these fan products are not in use, it will cause a lot of trouble for people to store or take them out, and it will also cause a large waste of resources.

[0003] There is a type of dual-purpose fan on the market that has a circle of resistance wire at the back of the fan blades. When used in summer, only the switch of the driving motor is turned on to rotate the fan blades and bring cool air. When used in winter, the driving motor and the resistance wire circuit switch are turned on at the same time, and the fan blades rotate while the resistance wire is energized and heated, thereby generating hot air. However, the resistance wire of this type of dual-purpose fan is located at the back of the fan blades, and there is a certain distance between the two, which not only increases the overall size of the fan, causing it to occupy a large space and is not conducive to storage or transportation; but also causes serious heat loss, greatly reduces the heat transfer efficiency, consumes a lot of energy, and has a weak heating effect. Summary of the invention

[0004] In order to solve the above technical problems, the present invention proposes a cooling and heating dual-purpose fan.

[0005] The technical problem to be solved by the present invention is achieved by adopting the following technical solutions:

[0006] A fan blade includes a heat exchange body formed by a self-constant temperature PTC heating element to form a fan blade, and blows out hot air after being powered on and rotated.

[0007] As a further improvement of the present invention, the fan blades are cross-flow fan blades.

[0008] As a further improvement of the present invention, the self-regulating PTC heating element is formed by winding a PTC metal strip to form a fan blade.

[0009] Alternatively, the self-regulating PTC heating element is a PTC ceramic, which also constitutes a fan blade and rotates when powered to blow out hot air.

[0010] Alternatively, the self-temperature-regulating PTC heating element is a PTC heating tube.

[0011] As another improvement of the present invention, the scheme is as follows:

[0012] A fan blade includes a heat exchange body formed by a self-constant temperature PTC heating element arranged on a fan blade body, and blows out hot air after being powered on and rotated.

[0013] As a further improvement of the present invention, the self-regulatory PTC heating element is connected to the fan blade body by any of die-casting, inlaying or pressing them into one body after bonding.

[0014] As a further improvement of the present invention, the self-temperature-regulating PTC heating element is arranged inside the fan blade body.

[0015] As a further improvement of the present invention, the fan blades are axial flow fan blades.

[0016] As a further improvement of the present invention, the fan blade body is made of aluminum or aluminum alloy material.

[0017] As a further improvement of the present invention, the self-temperature-regulating PTC heating element is a PTC heating tube.

[0018] The present invention further realizes the application of the fan blade, that is, the fan blade is applied in the following scheme:

[0019] A cooling and heating dual-purpose fan using the fan blades comprises the fan blades and a power output device for supplying power to a self-constant temperature PTC heating element to generate heat and driving the fan blades to rotate to generate hot air.

[0020] Furthermore, the power output device includes an electric slip ring for supplying power to the PTC heating element to generate heat, and a motor for driving the fan blades to rotate to generate airflow.

[0021] The beneficial effects of the present invention are:

[0022] The present invention utilizes the self-constant temperature PTC heating element as the heat source and further combines it with the function of the fan blades to form a heat exchange body that can rotate to emit hot air. Compared with the traditional dual-purpose fan composed of a heating element, a heat sink, a temperature controller and fan blades, the present invention integrates the functions of the four into one while simplifying the overall structure, reducing the overall volume, occupying less space, and being convenient for transportation and storage; and more importantly, it effectively avoids the loss of heat, improves the heat transfer efficiency, and has a significant heating effect. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] The present invention is further described below in conjunction with the accompanying drawings and embodiments:

[0024] Figure 1 This is a schematic diagram of the structure of an axial flow fan blade in Embodiment 1 of the present invention;

[0025] Figure 2 This is a schematic diagram of the structure of a cooling and heating dual-purpose fan using axial flow fan blades in the first embodiment of the present invention;

[0026] Figure 3 This is a schematic diagram of the structure of a cooling and heating dual-purpose fan using cross-flow fan blades in the second embodiment of the present invention;

[0027] Figure 4 This is a schematic diagram of the distribution of PTC heating tubes in the cross-flow fan blades in the second embodiment of the present invention;

[0028] Figure 5 It is a schematic diagram of the right end surface structure of the crossflow blade in the second embodiment of the present invention;

[0029] Figure 6 It is a schematic diagram of the left end surface structure of the crossflow blade in the second embodiment of the present invention;

[0030] Figure 7 This is a schematic diagram of the structure of a cross-flow fan blade wound with a PTC metal strip in the third embodiment of the present invention;

[0031] Figure 8 This is a schematic diagram of the cross-flow fan blade structure made of PTC ceramics and insulating plates in Example 4 of the present invention. DETAILED DESCRIPTION

[0032] In order to make the technical means, creative features, objectives and effects achieved by the present invention easy to understand, the present invention is further described below with reference to the accompanying drawings and embodiments.

[0033] The application modes of the present invention can be divided into two types: axial flow and cross flow, which are respectively described below with examples. Embodiment 1:

[0034] As an application of axial flow, a fan blade includes a heat exchange body formed by setting a self-constant temperature PTC heating element on the fan blade body, and blowing out hot air after being powered on and rotating.

[0035] The self-regulatory PTC heating element is connected to the fan blade body by any of die-casting, inlaying or pressing into one piece after bonding.

[0036] The specific applications are as follows:

[0037] like Figure 1 As shown, a fan blade is an axial flow fan blade, the blade body of the axial flow fan blade is composed of a hub 5 and three blade surfaces 6 evenly distributed along the circumferential end surface of the hub 5, a self-constant temperature PTC heating element similar to its outer contour shape is provided inside the blade body, in this embodiment, the PTC heating element is specifically a No. 1 PTC heating tube 7, both ends of the No. 1 PTC heating tube 7 extend from the side of the hub 5, which is convenient for connection with an external power supply, the blade body is made of aluminum or aluminum alloy material with good thermal conductivity, which can greatly improve the heat transfer of the No. 1 PTC heating tube 7 and reduce heat loss.

[0038] The No. 1 PTC heating tube 7 is placed inside the axial flow fan blade by die casting. The specific process flow is as follows: first, the No. 1 PTC heating tube 7 is bent into the shape required by the design; then, it is placed in a casting mold for casting; after the casting is completed, cleaning, tapping and surface treatment are performed.

[0039] like Figure 2 As shown, a cooling and heating dual-purpose fan using the axial flow fan blade comprises a base 1, a control button 2 arranged on the base 1, a motor housing 3 hinged to the base 1, and a No. 1 motor 4 arranged in the motor housing 3, wherein the No. 1 motor 4 is coaxially connected to the hub 5 in the axial flow fan blade through a motor shaft 41, and a No. 1 electric slip ring 8 correspondingly connected to the two ends of the No. 1 PTC heating tube 7 is arranged between the No. 1 motor 4 and the hub 5, and the No. 1 electric slip ring 8 can be a disc electric slip ring or a through-hole electric slip ring and other electric slip rings; in this embodiment, the power output device is the No. 1 motor 4, and the No. 1 electric slip ring 8 is a disc electric slip ring; it consists of a rotor on the left and a stator on the right, wherein the rotor is fixed on the motor shaft 41, and can rotate with the motor shaft 41 at the same time as the hub 5, and the rotor and the two ends of the No. 1 PTC heating tube 7 are also connected by wires, and the stator is fixed on the motor housing 3, and the motor shaft 41 passes through the center of the stator without contacting it.

[0040] The control button 2 is used to control the on / off of the circuit, the wind speed and the on / off of the first electric slip ring 8. The outer cover 9 for protection is arranged outside the axial flow fan blade, and the outer cover 9 is fixed to the motor housing 3 by bolts.

[0041] Working process:

[0042] When blowing cold air, just turn on the circuit switch, and the No. 1 motor 4 drives the axial flow fan blades to rotate to generate airflow to blow out cool air.

[0043] When blowing warm air, turn on the circuit switch and the electric slip ring circuit on-off switch, and the No. 1 PTC heating tube 7 is energized and heated through the No. 1 electric slip ring 8 to generate heat. At the same time, the axial flow fan blades are driven by the No. 1 motor 4 to rotate to generate airflow, which takes away the heat generated by the No. 1 PTC heating tube 7 to generate warm air and send it to the room. Embodiment 2:

[0044] As an application of through-flow, a fan blade includes a heat exchange body formed by setting a self-constant temperature PTC heating element on the fan blade body, and blowing out hot air after being powered on and rotating.

[0045] The specific applications are as follows:

[0046] like Figures 4 to 6As shown, the fan blade is a cross-flow fan blade, and the fan body of the cross-flow fan blade is composed of N fan blade strips 10 uniformly distributed along the circumference, fixed plate A end 11 and fixed plate B end 12 located at the left and right ends of the fan blade strips 10, and each fan blade strip 10 is provided with five PTC heating elements uniformly distributed along the radial direction. In this embodiment, the PTC heating element is a No. 2 PTC heating tube 14, and the left and right ends of the five No. 2 PTC heating tubes 14 are alternately connected in series through connecting guides 15 to form a total PTC heating tube, and the two ends of the total PTC heating tube extend out of the fixed plate A end 11 and the fixed plate B end 12, and then, the connecting guides 15 are used again to connect alternately left and right in groups of two, so that the total PTC heating tubes on several fan blade strips 10 are connected in series into a whole, and the two ends of the total PTC heating tube as a whole extend from the middle of the fixed plate A end 11 to facilitate connection with an external power supply. The cross-flow fan blades are also made of aluminum or aluminum alloy materials with good thermal conductivity, which can greatly improve the heat transfer of the second PTC heating tube 14 and reduce heat loss.

[0047] like Figure 3 As shown, a cooling and heating dual-purpose fan using crossflow blades includes a cylindrical shell 16, wherein the shell 16 is provided with a second motor 18, a hollow partition plate 17, and a crossflow blade in sequence from right to left. The motor shaft on the second motor 18 passes through the hollow partition plate 17 and is coaxially connected to the crossflow blade. The fixed plate B end 12 on the crossflow blade is fixed to the inner wall of the shell 16 through a bearing seat. During installation, the second motor 18, the crossflow blade and the shell 16 are required to be concentric. A second electric slip ring 19 is provided between the fixed plate A end 11 on the crossflow blade and the hollow partition plate 17, which is connected to the two ends of the total PTC heating tube as a whole to form a current loop. The second electric slip ring 19 is the same as the electric slip ring in the first embodiment, so it will not be described in detail. The power output device in this embodiment is the second motor 18.

[0048] In addition, an air inlet, an air port, a back plate and a vortex tongue are provided on the side of the crossflow blade and located on the side wall of the shell 16, wherein arrow a indicates the air inlet direction and arrow b indicates the air outlet direction.

[0049] Working process:

[0050] When blowing cold air, only the second motor 18 is needed to drive the crossflow fan blades to rotate, and airflow is generated under the action of the back plate and the vortex tongue, and blown out through the air outlet.

[0051] When blowing warm air, the No. 2 motor 18 drives the cross-flow fan blades to rotate, and the two ends of the total PTC heating tube are connected to the power supply, generating heat. Under the action of the back plate and the vortex tongue, airflow is generated, and the airflow takes away the heat to form warm air, which is blown out through the air outlet. Embodiment three:

[0052] Another application of through-flow is a fan blade, which includes a heat exchange body formed by a self-constant temperature PTC heating element constituting the fan blade, and blows out hot air after being powered on and rotating.

[0053] The self-temperature-controlled PTC heating element is formed by winding a PTC metal strip to form a fan blade.

[0054] In a specific application, the fan body of the crossflow fan blade is composed of N fan blade strips 10, a fixing plate A end 11 and a fixing plate B end 12 located at the left and right ends of the fan blade strip 10, such as Figure 7 As shown, the difference from the second embodiment is that the fan blade strip 10 is wound with a PTC metal strip to form a circuit that can be energized, and the rest of the structure is the same as the second embodiment.

[0055] A dual-purpose cooling and heating fan using the fan blades is different in structure from a dual-purpose cooling and heating fan using cross-flow fan blades in Example 2 in that the cross-flow fan blades in Example 2 are replaced with cross-flow fan blades wound with PTC metal strips in this embodiment, and the rest of the structure is the same as that in Example 2.

[0056] Working process:

[0057] When blowing cold air, only the motor is needed to drive the cross-flow fan blades made of PTC metal strips to rotate, and airflow is generated under the action of the back plate and the vortex tongue, and blown out through the air outlet.

[0058] When blowing warm air, in addition to the motor driving the cross-flow fan blades made of PTC metal strips to rotate, the two ends of the PTC metal strips are connected to the power supply to generate heat, and under the action of the back plate and the vortex tongue, airflow is generated to take away the heat generated by itself and blow it out through the air outlet. Embodiment 4:

[0059] Another application of through-flow is a fan blade, which includes a heat exchange body formed by a self-constant temperature PTC heating element constituting the fan blade, and blows out hot air after being powered on and rotating.

[0060] The self-regulating PTC heating element is a PTC ceramic, which rotates and blows out hot air when powered on.

[0061] like Figure 8 As shown, the difference from Example 2 and Example 3 lies in that PTC ceramics are used to make the blade strip shape in the through-flow fan blades, aluminum is sprayed on both sides to form electrodes, and a number of PTC ceramic blade strips are evenly distributed in a circular shape and fixed at both ends with insulating plates to form a through-flow fan blade with a different structure from that in Example 2, and the electrodes at both ends of the through-flow fan blade composed of PTC ceramics are alternately connected in the series manner in Example 2 to form a series current loop.

[0062] Working process:

[0063] When blowing cold air, only the motor is needed to drive the cross-flow fan blades made of PTC ceramics and insulating plates to rotate, and airflow is generated under the action of the back plate and the vortex tongue, and blown out through the air outlet.

[0064] When blowing warm air, in addition to the motor driving the cross-flow fan blades composed of PTC ceramics and insulating plates to rotate, the series current loop is connected to the power supply at the same time to generate heat, and generate airflow under the action of the back plate and the vortex tongue to take away the heat generated by itself and blow it out through the air outlet.

[0065] Similarly, the fan blades or dual-purpose fans of the present invention may be applied to related fields by being used alone or in combination with other components, or by simple structural replacement based on the present invention, all of which fall within the protection scope of the present invention.

[0066] The above shows and describes the basic principles, main features and advantages of the present invention. Those skilled in the art should understand that the present invention is not limited to the above embodiments. The above embodiments and descriptions only describe the principles of the present invention. Without departing from the spirit and scope of the present invention, the present invention may have various changes and improvements, which fall within the scope of the present invention. The scope of protection of the present invention is defined by the attached claims and their equivalents.

Claims

1. A cooling and heating dual-purpose fan, characterized in that: It includes fan blades, and a power output device for supplying power to the self-constant temperature PTC heating element to generate heat and driving the fan blades to rotate so as to generate hot air, wherein the fan blades are cross-flow fan blades; the power output device includes an electric slip ring for supplying power to the PTC heating element to generate heat, and a motor for driving the cross-flow fan blades to rotate so as to generate airflow; the cross-flow fan blades include a heat exchange body formed by a self-constant temperature PTC heating element arranged on the fan blade body, which blows out hot air after being powered on and rotated; the self-constant temperature PTC heating element is arranged inside the fan blade body; the fan blade body of the cross-flow fan blade is composed of N fan blade strips evenly distributed along the circumference, a fixed plate A end and a fixed plate B end located at the left and right ends of the fan blade strip, and each fan blade strip is provided with five PTC heating elements evenly distributed along the radial direction; the left and right ends of the five PTC heating elements are connected by guide plates The PTC heating tubes are connected alternately in series to form a total PTC heating tube, and both ends of the total PTC heating tube extend out of the fixed plate A end and the fixed plate B end, and are again connected alternately left and right in groups of two using connecting guides, so that the total PTC heating tubes on several fan blade strips are connected in series to form a whole; it also includes a cylindrical shell, and the interior of the shell is provided with a No. 2 motor, a hollow partition plate, and a cross-flow fan blade from right to left in sequence, the motor shaft on the No. 2 motor passes through the hollow partition plate and is coaxially connected to the cross-flow fan blade, and the fixed plate B end on the cross-flow fan blade is fixed to the inner wall of the shell through a bearing seat, and the No. 2 motor, the cross-flow fan blade and the shell are required to be concentric during installation; an electric slip ring is provided between the fixed plate A end on the cross-flow fan blade and the hollow partition plate, which is connected to the two ends of the total PTC heating tube as a whole to form a current loop.

2. A cooling and heating dual-purpose fan according to claim 1, characterized in that: The self-regulatory PTC heating element is connected to the fan blade body by any of die-casting, inlaying or pressing into one piece after bonding.

3. The cooling and heating dual-purpose fan according to claim 1, characterized in that: The fan blade body is made of aluminum or aluminum alloy material.

4. The cooling and heating dual-purpose fan according to claim 1, characterized in that: The self-regulating PTC heating element is a PTC heating tube.

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