Fan heating structure and axial fan device

Abstract

The utility model discloses a fan heating structure and axial flow fan device, this fan heating structure includes: frame, the frame inside has and installs the department of air supply channel, axial flow fan, axial flow fan is located in the air supply channel, and axial flow fan has the assembly part and built -in space, and axial flow fan is installed in the assembly part of frame's installation department, the heat dissipation fan, the heat dissipation fan is located in the built -in space of axial flow fan, bearing, bearing is connected with axial flow fan and heat dissipation fan respectively, and bearing rotates, can drive heat dissipation fan and axial flow fan synchronous movement, the middle pipe, the middle pipe is located in the bearing, and the middle pipe has the grease layer, heating coil, heating coil is located on the middle pipe, thermal sensor, thermal sensor is connected with heating coil electricity, controller, controller is connected with heating coil and thermal sensor electricity respectively. The utility model discloses a technical scheme can start the fan under low temperature, guarantees the reliability of fan starting.

Description

Technical Field

[0001] This utility model relates to an axial flow fan device, and more particularly to a fan heating structure and an axial flow fan device. Background Technology

[0002] Fans are a common household appliance for heat dissipation. Fans are broadly classified into axial fans and centrifugal fans. Axial fans are simple in structure and relatively inexpensive. Their principle is that airflow enters from the rear of the fan, is accelerated, and then exits from the front. Axial fans are driven by a motor. In low temperatures, axial fans are prone to freezing, preventing the motor from driving them. Current technologies involve adding lubricant to the axial fan and thawing it by heating the lubricant. However, this heating process can lead to uneven heating and difficulty in starting the fan. Therefore, solving the problem of starting axial fans in low temperatures has become a pressing issue in the industry.

[0003] In view of this, it is necessary to propose further improvements to the current heating structure of the fan. Utility Model Content

[0004] To solve at least one of the above-mentioned technical problems, the main objective of this utility model is to provide a fan heating structure and an axial flow fan device.

[0005] To achieve the above objectives, the present invention provides a technical solution as follows: a fan heating structure, comprising: A frame, the interior of which has an air supply channel and a mounting section; An axial flow impeller is located within an air supply channel, and the axial flow impeller has an assembly part and an internal space. The axial flow impeller is rotatably mounted on the mounting part of the frame via the assembly part. A cooling fan, wherein the cooling fan is located within the built-in space of the axial flow fan; The bearing is connected to the axial flow fan and the cooling fan respectively. When the bearing rotates, it can drive the cooling fan and the axial flow fan to move synchronously. A central tube, located within the bearing, having a heat-meltable grease layer; A heating coil, wherein the heating coil is located on the central tube; A thermal sensing element, which is electrically connected to a heating coil, is used to detect the temperature at the bearing. The controller is electrically connected to both the heating coil and the thermal sensing element to control the operation of the heating coil based on the temperature detected by the thermal sensing element.

[0006] The heating coils are multiple and are evenly arranged on the outer peripheral wall of the central tube, with gaps between adjacent heating coils.

[0007] The heating coils are multiple, and the multiple heating coils are stacked and wound around the outer peripheral wall of the central tube, with adjacent heating coils arranged close together.

[0008] The thermal sensing element is a thermistor, which is positioned close to the bearing to detect the real-time temperature at the bearing.

[0009] It also includes a display module, which is electrically connected to the controller to display real-time temperature data at the bearing collected by the thermistor.

[0010] The fan heating structure also includes an inner liner and a cover, both of which are located within the built-in space of the axial fan. The inner liner has an open inner space, and the cover closes to the opening of the inner liner. The heat dissipation impeller, bearing, and central tube are respectively located within the inner space of the inner liner.

[0011] The thermistor includes a first thermistor and a second thermistor. The first thermistor is located at the bearing, and the second thermistor is located on the outside of the liner or the outside of the cover to detect the external ambient temperature.

[0012] The outer periphery of the frame has a drainage channel and an opening gap. The drainage channel is connected to the air outlet of the air supply channel through the opening gap, and the opening gap is located close to the air outlet of the air supply channel.

[0013] To achieve the above objectives, another technical solution adopted by this utility model is to provide an axial flow fan device, including the fan heating structure as described above.

[0014] The technical solution of this utility model mainly includes an axial flow impeller, a heat dissipation impeller, a bearing, a central tube, a heating coil, a thermal sensing element, and a controller. A heatable and meltable grease layer is installed inside the central tube, and a heating coil is located on the outer periphery of the central tube. In low-temperature environments, the grease layer is in a solidified state, correspondingly freezing the axial flow impeller and the heat dissipation impeller. If the motor needs to drive the fan to rotate at low temperatures, the thermal sensing element monitors the temperature at the bearing in real time. When the bearing temperature is lower than a set value, the heating coil is activated, causing the temperature of the central tube to gradually rise. This heats the central tube, slowly melting the solidified grease layer inside. The melted grease lubricates the bearing, thawing the bearing and consequently the axial flow impeller. This solves the problem of the axial flow impeller being difficult to start in low-temperature environments, ensuring the reliability of impeller startup. Attached Figure Description

[0015] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on the structures shown in these drawings without creative effort.

[0016] Figure 1 This is a schematic diagram of the overall structure of a fan heating structure according to an embodiment of the present invention; Figure 2 This is a partially exploded structural diagram of a fan heating structure according to an embodiment of the present invention; Figure 3 This is an exploded structural diagram of a fan heating structure according to an embodiment of the present invention.

[0017] Label Explanation: 100. Axial fan; 101. Internal space; 200. Frame; 201. Air intake channel; 202. Opening gap; 203. Air supply channel; 210. Mounting part; 220. Connecting arm; 310. Liner; 311. Internal space; 320. Cover; 400. Cooling fan; 500. Bearing; 600. Thermal element; 700. Middle tube; 800. Heating coil.

[0018] The realization of the purpose, functional features and advantages of this utility model will be further explained in conjunction with the embodiments and with reference to the accompanying drawings. Detailed Implementation

[0019] 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.

[0020] It should be noted that the descriptions involving "first," "second," etc., in this utility model are for descriptive purposes only and should not be construed as indicating or implying their relative importance or implicitly specifying the number of technical features indicated. Therefore, a feature defined with "first" or "second" may explicitly or implicitly include at least one of those features. Furthermore, the technical solutions of the various embodiments can be combined with each other, but this must be based on the ability of those skilled in the art to implement them. If the combination of technical solutions is contradictory or impossible to implement, such a combination of technical solutions should be considered non-existent and not within the scope of protection claimed by this utility model.

[0021] Unlike existing axial fans that struggle to start in low temperatures, this invention provides a fan heating structure. By adding a heating coil and a thermistor to the fan bearing, the heating coil and thermistor can evenly heat the lubricant, defrosting the axial fan and making it suitable for starting the fan in low-temperature environments. Please refer to the following embodiment for the specific structure of this fan heating system.

[0022] Please refer to Figures 1 to 3 , Figure 1 This is a schematic diagram of the overall structure of a fan heating structure according to an embodiment of the present invention; Figure 2 This is a partially exploded structural diagram of a fan heating structure according to an embodiment of the present invention; Figure 3 This is an exploded view of a fan heating structure according to an embodiment of the present invention. In this embodiment, the fan heating structure is suitable for use in low-temperature environments, particularly in environments with temperatures ranging from -40°C to 50°C. In this embodiment, the fan heating structure includes: a frame 200, an axial flow fan 100, a cooling fan 400, a bearing 500, a motor, a central tube 700, a heating coil 800, a thermal sensing element 700, and a controller. The motor can drive the axial flow fan 100 and the cooling fan 400 to rotate synchronously.

[0023] The frame 200 has an internal air supply channel 203 and a mounting part 210 located at the air outlet of the air supply channel 203. The mounting part 210 is connected to the frame 200 via connecting arms 220. There are three or more connecting arms 220. In this design, there are four connecting arms 220, with one end of each arm connected to the mounting part 210 and the other end connected to the inner sidewall of a corner of the frame 200. The size of the connecting arms 220 can be flexibly set according to actual requirements.

[0024] An axial flow fan 100 is located within an air supply channel 203 and has an assembly part and an internal space 101. The axial flow fan 100 is rotatably mounted on the mounting part 210 of the frame 200 via the assembly part. The axial flow fan 100 has an air inlet side and an air outlet side. The air inlet side of the axial flow fan 100 is connected to the air inlet of the air supply channel 203, and the air outlet side of the axial flow fan 100 is connected to the air outlet of the air supply channel 203.

[0025] A cooling fan 400 is located within the built-in space 101 of the axial fan 100. The cooling fan 400 rotates with the axial fan 100. The cooling fan 400 is primarily used to rapidly dissipate heat from the built-in space 101 of the axial fan 100, preventing heat accumulation. Specifically, the cooling fan 400 diffuses the heat accumulated in the built-in space 101 to the external space through heat dissipation channels. These channels can be heat dissipation gaps or multiple interconnected heat dissipation notches.

[0026] A bearing 500 is connected to both the axial flow fan 100 and the cooling fan 400. When the bearing 500 rotates, it drives the cooling fan 400 and the axial flow fan 100 to move synchronously. In low-temperature environments, the bearing 500 may freeze, affecting the normal start-up of the axial flow fan 100 and the cooling fan 400. In this solution, the bearing 500 contains a grease layer and a heating coil 800. The heating coil 800 heats the grease layer, melting part of it and thus thawing the bearing 500.

[0027] A central tube 700 is located within the bearing 500 and has a heat-melting grease layer. The grease layer can be arranged in layers and then rolled into a tube, or the grease can be in rod shape. To facilitate heat conduction, the central tube 700 can be made of a metal or alloy with good thermal conductivity to enable rapid heat transfer and reduce heat loss.

[0028] A heating coil 800 is located on the central tube 700 and is wound around it. The number of heating coils 800 wound around the central tube 700 can be flexibly set according to actual requirements. When the heating coil 800 is working, it continuously heats the central tube 700, and the heat is transferred to the grease layer through the central tube 700 to heat and melt the grease layer. The melted grease layer can preheat and defrost the bearing 500, thus ensuring the normal start-up of the axial fan in low-temperature environments and ensuring its reliability.

[0029] A thermal sensing element 700 is electrically connected to a heating coil 800 to detect the temperature at the bearing 500. The thermal sensing element 700 can detect the real-time temperature at the bearing 500 and transmit the data to the controller.

[0030] The controller is electrically connected to both the heating coil 800 and the thermal sensing element 700 to control the operation of the heating coil 800 based on the temperature detected by the thermal sensing element 700. When the motor starts and the axial fan cannot rotate in a low-temperature environment, the thermal sensing element 700 generates a first trigger signal, which is sent to the controller. The controller controls the heating coil 800 to start working based on the first trigger signal to melt part of the grease layer. When the temperature at the bearing 500 reaches a set value, the thermal sensing element generates a second trigger signal. The controller controls the heating coil 800 to stop working based on the second trigger signal. At this time, the grease layer stops melting, and the remaining grease layer is reserved for the next use.

[0031] In one specific embodiment, there are multiple heating coils 800, which are evenly arranged on the outer peripheral wall of the central tube 700, with gaps between adjacent heating coils 800. Considering the real-time temperature collected by the thermal sensing element 700, the collected low-temperature range can be graded. For example, -40℃ to 45℃ and -45℃ to 50℃ correspond to two types of trigger signals. After receiving the two types of trigger signals, the controller provides different heating effects to the heating coils 800. The trigger signal corresponding to -40℃ to 45℃ is allocated with lower heating efficiency, while the trigger signal corresponding to -45℃ to 50℃ is allocated with higher heating efficiency, so that the heating time of the heating coils 800 under different low-temperature conditions is generally similar. In this embodiment, the heating efficiency of the heating coils 800 is not high, corresponding to the higher temperature range in the low-temperature environment.

[0032] In one parallel embodiment, there are multiple heating coils 800, which are stacked and wound around the outer peripheral wall of the central tube 700, with adjacent heating coils 800 arranged close together. In this embodiment, the heating coils 800 have high heating efficiency, corresponding to the lower temperature range in a low-temperature environment.

[0033] In addition to designing the structure of the heating coil 800, the output power of the heating coil 800 can also be adjusted by changing the power of electrical energy.

[0034] In one embodiment, the thermal sensing element 700 is a thermistor, which is positioned close to the bearing 500 to detect the real-time temperature at the bearing 500. The thermal sensing element 700 can also be replaced by a thermal sensor. There can be one or more thermistors, which can be adapted to bearings 500 of different sizes to detect the real-time temperature at different locations on the bearing 500, thereby improving the reliability of the bearing 500's defrosting.

[0035] For ease of viewing, a display module is also included. This display module is electrically connected to the controller to display the real-time temperature data collected by the thermistor at bearing 500. This display module can display the real-time temperature collected by the thermistor, as well as the operating status and parameters of the heat dissipation coil. In case of abnormal data, the display module can also display a fault signal.

[0036] In one specific embodiment, the fan heating structure further includes an inner liner 310 and a cover 320, both located within the internal space 101 of the axial fan. The inner liner 310 has an open inner space, and the cover 320 covers the opening of the inner liner 310. The cooling impeller, bearing 500, and central tube 700 are respectively located within the inner space of the inner liner 310. The cover 320 is detachably fitted onto the opening of the inner liner 310. The inner liner 310 facilitates the installation and protection of the cooling impeller, bearing 500, and central tube 700.

[0037] In addition to the comparison requirement for temperature detection, the thermistor includes a first thermistor and a second thermistor. The first thermistor is located at the bearing 500, and the second thermistor is located outside the liner 310 or outside the cover 320 to detect the external ambient temperature. The first and second thermistors can collect temperatures at different locations to provide feedback on temperature differences under different environments.

[0038] In one specific embodiment, the outer periphery of the frame 200 has a drainage channel 201 and an opening gap 202. The drainage channel 201 is connected to the air outlet of the air supply channel 203 through the opening gap 202, and the opening gap 202 is located close to the air outlet of the air supply channel 203. In this embodiment, when the air supply channel 203 of the frame 200 supplies air, a negative pressure zone is formed at the outlet of the air supply channel 203. At this time, the drainage channel 201 can supplement the airflow through the opening gap 202, thereby increasing the air volume of the axial fan.

[0039] In an embodiment of this utility model, the axial fan device includes the aforementioned fan heating structure. The specific structure of this fan heating structure is described in the above embodiments and will not be repeated here. Since the axial fan device of this solution adopts all the technical solutions of all the embodiments of the aforementioned fan heating structure, it possesses at least all the advantages and beneficial effects brought about by the technical solutions of the aforementioned fan heating structure embodiments, which will not be elaborated upon here.

[0040] The above description is only a preferred embodiment of the present utility model and does not limit the patent scope of the present utility model. All equivalent structural transformations made under the technical concept of the present utility model using the contents of the present utility model specification and drawings, or direct / indirect applications in other related technical fields, are included within the patent protection scope of the present utility model.

Claims

1. A fan heating structure, characterized in that, The fan heating structure includes: The frame has an air supply channel and an installation part inside; An axial flow impeller is located within an air supply channel, and the axial flow impeller has an assembly part and an internal space. The axial flow impeller is rotatably mounted on the mounting part of the frame via the assembly part. A cooling fan, wherein the cooling fan is located within the built-in space of the axial flow fan; The bearing is connected to the axial flow fan and the cooling fan respectively. When the bearing rotates, it can drive the cooling fan and the axial flow fan to move synchronously. A central tube, located within the bearing, having a heat-meltable grease layer; A heating coil, wherein the heating coil is located on the central tube; A thermal sensing element, which is electrically connected to a heating coil, is used to detect the temperature at the bearing. The controller is electrically connected to both the heating coil and the thermal sensing element to control the operation of the heating coil based on the temperature detected by the thermal sensing element.

2. The fan heating structure as described in claim 1, characterized in that, There are multiple heating coils, which are evenly arranged on the outer peripheral wall of the central tube, with gaps between adjacent heating coils.

3. The fan heating structure as described in claim 1, characterized in that, There are multiple heating coils, which are stacked and wound around the outer peripheral wall of the central tube, with adjacent heating coils arranged close together.

4. The fan heating structure as described in claim 1, characterized in that, The thermal sensing element is a thermistor, which is positioned close to the bearing to detect the real-time temperature at the bearing.

5. The fan heating structure as described in claim 4, characterized in that, It also includes a display module, which is electrically connected to the controller to display real-time temperature data at the bearing collected by the thermistor.

6. The fan heating structure as described in claim 4, characterized in that, The fan heating structure also includes an inner liner and a cover, both of which are located within the built-in space of the axial fan. The inner liner has an open inner space, and the cover closes to the opening of the inner liner. The heat dissipation impeller, bearing, and central tube are respectively located within the inner space of the inner liner.

7. The fan heating structure as described in claim 6, characterized in that, The thermistor includes a first thermistor and a second thermistor. The first thermistor is located at the bearing, and the second thermistor is located on the outside of the liner or the outside of the cover to detect the external ambient temperature.

8. The fan heating structure as described in claim 1, characterized in that, The outer periphery of the frame has a drainage channel and an opening gap. The drainage channel is connected to the air outlet of the air supply channel through the opening gap, and the opening gap is located close to the air outlet of the air supply channel.

9. An axial flow fan device, characterized in that, The axial fan device includes the fan heating structure as described in any one of claims 1 to 8.

Images