Fan assembly and gas water heater containing the same

Abstract

The present invention discloses a fan assembly and a gas water heater including the same. The fan assembly includes: a motor, which drives an impeller to rotate, and the motor has an end cover, in which a circuit board is arranged; a heat dissipation device, which is at least partially arranged in the end cover and is used to dissipate heat from the motor; a heat conducting device, which is arranged inside the end cover, and one end of the heat conducting device abuts against the heat dissipation device, and the other end of the heat conducting device is arranged close to the circuit board; the heat conducting device is used to transfer heat on the circuit board to the heat dissipation device, and the heat conducting device transfers heat on the circuit board inside the motor to the outside of the motor in a timely manner through the heat conducting device, and dissipates heat through the heat dissipation device. When the fan assembly is working, the heat inside the motor can be transferred out in a timely manner, thereby preventing damage to the electronic components inside the motor, improving the life of the motor, and ensuring the reliability of the operation of the fan assembly.

Description

Technical Field

[0001] The present invention relates to the technical field of gas water heaters, and in particular to a fan assembly and a gas water heater comprising the fan assembly. Background Art

[0002] Existing gas water heaters include a fan assembly. When the gas water heater is working, the fan assembly blows combustion-supporting air into the gas water heater. The fan assembly includes a motor that provides power for it. When working, the motor runs, and some energy is dissipated in the coil in the form of heat. This heat will cause the motor to heat up; at the same time, the electronic components on the PCB board of the motor will generate a large amount of heat when working. Due to the high integration and small size of the circuit board, the heat generated on the circuit board cannot be discharged in time, which can easily cause damage to the components. Long-term use in a high-temperature environment will affect the service life of the fan assembly, thereby shortening the service life of the gas water heater. Summary of the Invention

[0003] The technical problem to be solved by the present invention is to overcome the defect of poor heat dissipation performance of the fan assembly in the prior art and to provide a fan assembly and a gas water heater comprising the same.

[0004] The present invention solves the above technical problems through the following technical solutions:

[0005] The present invention provides a fan assembly, comprising: a motor, which drives an impeller to rotate, the motor having an end cover, and a circuit board arranged inside the end cover; a heat dissipation device, which is at least partially arranged inside the end cover and is used to dissipate heat from the motor; a heat conducting device, which is arranged inside the end cover, with one end of the heat conducting device abutting against the heat dissipation device and the other end of the heat conducting device being arranged close to the circuit board; the heat conducting device is used to transfer heat from the circuit board to the heat dissipation device.

[0006] In this solution, a heat conducting device and a heat dissipating device are provided in the fan assembly, and the heat dissipating device is at least partially provided in the end cover for dissipating heat to the motor; the heat conducting device is provided inside the end cover, and one end of the heat conducting device is in contact with the heat dissipating device, and the other end of the heat conducting device is provided close to the circuit board. The heat conducting device can transfer the heat emitted from the circuit board to the heat dissipating device, and the heat dissipating device dissipates heat to the outside. When the fan assembly is working, the heat inside the motor can be transferred out in time to prevent damage to the circuit board and electronic components inside it, thereby improving the life of the motor and ensuring the reliability of the operation of the fan assembly.

[0007] Preferably, the heat-conducting device includes a heat-conducting spring and a heat-conducting sheet, one end of the heat-conducting spring is connected to the circuit board, the other end of the heat-conducting spring is connected to the heat-conducting sheet, and the side of the heat-conducting sheet away from the heat-conducting spring abuts against the heat dissipation device.

[0008] In this solution, the heat on the circuit board is first transferred to the thermal conductive sheet through the thermal conductive spring, and the thermal conductive sheet then transfers the heat to the heat sink. A conductive spring with a smaller contact surface is provided at the end in contact with the circuit board, which does not affect the performance of the circuit board. A thermal conductive sheet is provided at the end connected to the heat sink. The contact between the thermal conductive sheet and the heat sink not only increases the heat dissipation area and improves the heat dissipation effect, but also makes the heat transfer more uniform.

[0009] Preferably, the heat conducting sheet extends downwardly along a side wall in a circumferential direction thereof, and an inner side surface of the side wall is sleeved on the coil frame of the motor.

[0010] In this solution, the heat conducting sheet is sleeved on the inner side surface of the side wall extending in the circumferential direction thereof, so that the heat on the coil frame can be transferred to the heat conducting sheet in time, thereby preventing the coil frame from being overheated.

[0011] Preferably, the heat conducting plate extends downwardly along a side wall in a circumferential direction thereof, and an outer side surface of the side wall abuts against an inner side surface of the end cover of the motor.

[0012] In this solution, the outer side surface of the side wall extending downward along the circumference of the heat conducting plate abuts against the inner side surface of the end cover of the motor, which can transfer the heat from the inner wall of the motor end cover to the heat conducting plate, and then transfer the heat to the heat dissipation device for heat dissipation.

[0013] Preferably, a heat-conducting insulating sheet is provided at one end of the heat-conducting spring connected to the circuit board, and a heat sink is provided at one end of the heat-conducting spring connected to the heat-conducting sheet.

[0014] In this solution, a thermal insulation sheet is provided at one end of the thermal spring connected to the circuit board for insulation to improve safety performance, and a heat sink is provided at one end of the thermal spring connected to the thermal sheet to enhance the speed or efficiency of heat transfer.

[0015] Preferably, the heat dissipation device includes a radiator and a connecting part, the radiator is located above the connecting part, the lower part of the connecting part is located inside the end cover, the upper part of the connecting part is located on the end cover and forms an air inlet chamber with the end cover, and a plurality of first openings are opened on the upper circumferential side of the connecting part.

[0016] In this solution, the heat dissipation device includes a radiator and a connecting part. The upper part of the connecting part is located on the end cover and forms an air inlet chamber with the end cover. Several first openings are opened on the upper circumferential side of the connecting part, which can increase the contact area with the external cooling air, form natural convection, and cool the motor.

[0017] Preferably, the radiator is a water-cooled radiator, and a pipe is provided on the radiator.

[0018] In this solution, a water-cooled radiator is used to improve heat exchange efficiency, and pipes are set on the radiator to facilitate water inlet.

[0019] Preferably, a second opening is provided on the top of the end cover, and a rotating shaft of the motor has a through hole extending along its length, and the rotating shaft is connected to the second opening.

[0020] In this solution, during the operation of the fan assembly, the air flow rate in the impeller reaches a certain level, forming a negative pressure area, allowing the outside cold air to enter the impeller through the first opening, the air inlet chamber, the second opening, and the rotating shaft. In this process, the outside cooling air and the motor form forced convection to cool the motor, and the temperature of the outside cooling air will rise after absorbing the heat from the motor end cover. The temperature of the air entering the impeller is higher than that of the outside cold air. If the fan assembly is used in a gas water heater to provide combustion-supporting air for the combustion device, it can also make the gas water heater burn more fully.

[0021] The present invention also provides a gas water heater, which includes the aforementioned fan assembly.

[0022] Preferably, the fan assembly is connected to the combustion device to provide combustion-supporting air to the combustion device, the water inlet pipe of the gas water heater is connected to the pipe on the radiator, and the water in the water inlet pipe enters the gas water heater after passing through the radiator.

[0023] In this solution, the water inlet pipe of the gas water heater is connected to the pipe on the radiator, and the water in the water inlet pipe enters the gas water heater after passing through the heat dissipation device. After the water in the water inlet pipe of the gas water heater passes through the heat dissipation device, it can heat the cold water and utilize the waste heat, making the water heater more energy-efficient and also making the gas water heater burn more fully.

[0024] The positive progressive effect of the present invention is that: the fan assembly provided by the present invention includes a motor, a heat dissipation device and a heat conducting device, the motor is provided with an end cover, the heat dissipation device is at least partially arranged in the end cover, the heat conducting device is arranged inside the end cover, and the heat dissipation device is at least partially arranged outside the end cover and the thermal device and heat conducting device are located in the electrode end cover, the heat dissipation device is at least partially arranged in the end cover, the heat dissipation device is used to dissipate heat from the motor, the heat conducting device transfers the heat on the circuit board inside the motor to the outside of the motor in time through the heat conducting device, and dissipates heat through the heat dissipation device. When the fan assembly is working, the heat inside the motor can be transferred out in time to prevent damage to the electronic components inside it, improve the life of the motor, and ensure the reliability of the operation of the fan assembly. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] Figure 1 Schematic diagram of the three-dimensional structure of a fan assembly according to an embodiment of the present invention.

[0026] Figure 2 FIG. 4 is a top view of a fan assembly according to an embodiment of the present invention.

[0027] Figure 3 for Figure 2 Cross-sectional view of the blower assembly along the AA direction.

[0028] Figure 4 FIG. 1 is a schematic diagram of the three-dimensional structure of a heat conducting sheet according to an embodiment of the present invention.

[0029] Figure 5 FIG. 4 is a schematic diagram of the three-dimensional structure of a heat-conducting spring according to an embodiment of the present invention.

[0030] Figure 6 FIG. 1 is a schematic diagram of the three-dimensional structure of a heat dissipation device according to an embodiment of the present invention.

[0031] Figure 7 The figure is a schematic three-dimensional cross-sectional structural diagram of an end cover of a motor according to an embodiment of the present invention.

[0032] Figure 8 Schematic diagram of the structure of a gas water heater according to an embodiment of the present invention.

[0033] Description of Reference Numerals

[0034] Fan assembly 1

[0035] Motor 2

[0036] End cap 21

[0037] Second opening 211

[0038] Mounting hole 212

[0039] Circuit board 23

[0040] Coil frame 24

[0041] Impeller 3

[0042] Impeller cover 31

[0043] Heat dissipation device 4

[0044] Radiator 41

[0045] Pipeline 411

[0046] Connecting portion 42

[0047] First opening 421

[0048] Heat conduction device 5

[0049] Thermal conductive sheet 51

[0050] Side wall 511

[0051] Thermal spring 52

[0052] Thermal insulation sheet 521

[0053] Heat sink 522

[0054] Shaft 25

[0055] Through hole 251

[0056] Gas water heater 6

[0057] Water inlet pipe 61

[0058] Outlet pipe 62

[0059] First heat exchange module 63

[0060] The second heat exchange module 64

[0061] The third heat exchange module 65

[0062] Valve 66

[0063] Gas hood 67 DETAILED DESCRIPTION

[0064] The present invention is further described below by way of examples, but the present invention is not limited to the scope of the examples.

[0065] The present invention provides a fan assembly 1, such as Figure 1As shown, the fan assembly 1 includes: a motor 2, a heat sink 4, and a heat conducting device 5. The motor 2 drives the impeller 3 to rotate. The motor 2 has an end cover 21, and a circuit board 23 is disposed inside the end cover 21. The heat sink 4 is at least partially disposed inside the end cover 21 and is used to dissipate heat from the motor 2. The heat conducting device 5 is disposed inside the end cover 21, with one end of the heat sink 5 abutting against the heat sink 4 and the other end of the heat conducting device 5 being disposed near the circuit board 23. The heat conducting device 5 is used to transfer heat from the circuit board 23 to the heat sink 4. When the fan assembly 1 is operating, the heat conducting device 5 can transfer heat dissipated from the circuit board 23 to the heat sink 4, which then dissipates heat externally. When the fan assembly 1 is operating, the heat inside the motor 2 can be promptly transferred out, preventing damage to the circuit board 23 and electronic components therein, thereby increasing the life of the motor 2 and ensuring the reliability of the operation of the fan assembly 1.

[0066] like Figure 2 As shown, the fan assembly 1 further includes an impeller cover 31, the impeller 3 is placed inside the cover, and the end cover 21 and the impeller cover 31 are fixed by a connecting piece.

[0067] Figure 3 for Figure 2 In the schematic diagram of the three-dimensional cross-sectional structure along the AA direction, the heat conducting device 5 includes a heat conducting spring 52 and a heat conducting sheet 51. One end of the heat conducting spring 52 is connected to the circuit board 23, and the other end of the heat conducting spring 52 is connected to the heat conducting sheet 51. The side of the heat conducting sheet 51 away from the heat conducting spring 52 abuts the heat sink 4. The heat conducting spring 52 first transfers heat from the circuit board 23 to the heat conducting sheet 51, which then transfers the heat to the heat sink 4. The conductive spring with a smaller contact surface is provided at the end in contact with the circuit board 23 to avoid affecting the performance of the circuit board 23. The heat conducting sheet 51 is provided at the end connected to the heat sink 4. The abutment of the heat conducting sheet 51 with the heat sink 4 not only increases the heat dissipation area and improves the heat dissipation effect, but also makes the heat transfer more uniform. In this embodiment, the heat-conducting device 5 includes a heat-conducting spring 52 and a heat-conducting plate 51. The heat-conducting spring 52 is arranged between the circuit board 23 and the heat-conducting plate 51. Of course, in other embodiments, the heat-conducting device 5 may not include the heat-conducting spring 52, and the circuit board 23 transfers heat to the heat-conducting plate 51 by thermal radiation.

[0068] like Figure 3-Figure 4The heat conducting sheet 51 extends downwardly along its circumferential sidewall 511. An opening is provided in the center of the heat conducting sheet 51 for the motor 2's rotating shaft 25 to pass through. The inner and outer sides of the circumferentially extending sidewall 511 of the heat conducting sheet 51 are respectively sheathed against the inner sides of the coil frame 24 and the end cap 21 of the motor 2. This not only allows the heat on the coil frame 24 to be promptly transferred to the heat conducting sheet 51 to prevent the coil frame 24 from overheating, but also allows the heat on the inner sidewall 511 of the end cap 21 of the motor 2 to be transferred to the heat conducting sheet 51, which then transfers the heat to the heat dissipation device 4 for dissipation. In other embodiments, according to different needs, only the inner side of the circumferentially extending sidewall 511 of the heat conducting sheet 51 may be sheathed against the coil frame 24, or only the outer side of the circumferentially extending sidewall 511 of the heat conducting sheet 51 may be sheathed against the inner side of the end cap 21 of the motor 2.

[0069] like Figure 5 As shown, both ends of the thermally conductive spring 52 are provided with a thermally conductive insulating sheet 521 and a heat sink 522, respectively. The end connected to the circuit board 23 is provided with the thermally conductive insulating sheet 521, and the end of the thermally conductive spring 52 connected to the heat conductive sheet 51 is provided with the heat sink 522. The thermally conductive insulating sheet 521 is provided at the end of the thermally conductive spring 52 connected to the circuit board 23 for insulation and improved safety, while the heat sink 522 is provided at the end of the thermally conductive spring 52 connected to the heat conductive sheet 51 to enhance the speed or efficiency of heat transfer.

[0070] like Figure 6 As shown, the heat dissipation device 4 includes a radiator 41 and a connecting portion 42. The radiator 41 is located above the connecting portion 42. The lower portion of the connecting portion 42 is located within the end cover 21. The upper portion of the connecting portion 42 is located on the end cover 21, and the end cover 21 forms an air inlet chamber. A plurality of first openings 421 are provided around the upper portion of the connecting portion 42. The heat dissipation device 4 includes a radiator 41 and a connecting portion 42. The end cover 21 is provided with a mounting hole 212. The heat dissipation device abuts against the heat conducting sheet 51 through the mounting hole 212. The upper portion of the connecting portion 42 is located on the end cover 21, and the end cover 21 forms an air inlet chamber. A plurality of first openings 421 are provided around the upper portion of the connecting portion 42, which can increase the contact area with the external cooling air, form natural convection, and cool the motor 2.

[0071] like Figure 6 As shown, the radiator 41 is a water-cooled radiator 41, and a pipe 411 is provided on the radiator 41. The water-cooled radiator 41 is adopted to improve the heat exchange efficiency, and the pipe 411 is provided on the radiator 41 to facilitate water inlet.

[0072] Figure 7 The figure is a schematic diagram of a three-dimensional cross-sectional structure of the end cover 21 of the motor 2. A second opening 211 is provided on the top of the end cover 21. The shaft 25 of the motor 2 has a through hole 251 extending along the length direction. The shaft 25 is connected to the second opening 211. Figure 3 It is understood that during the operation of the fan assembly 1, the air flow rate in the impeller 3 reaches a certain value, forming a negative pressure area, so that the external cold air enters the impeller 3 through the first opening 421, the air inlet chamber, the second opening 211, and the rotating shaft 25 (such as Figure 3 As shown in the middle direction B), in this process, the external cooling air and the motor 2 form forced convection to cool the motor 2, and the temperature of the external cooling air will rise after absorbing the heat of the end cover 21 of the motor 2. The temperature of the air entering the impeller 3 is higher than that of the external cold air. If the fan assembly 1 is applied to the gas water heater 6 to provide combustion air for the combustion device, the temperature of the combustion air is increased, and the activation energy required for the chemical reaction between the burner such as methane and oxygen is reduced, so that the gas water heater 6 burns more fully.

[0073] like Figure 8 As shown, the present invention further provides a gas water heater 6 , which includes the aforementioned fan assembly 1 .

[0074] The fan assembly 1 is located below the gas water heater 6 to provide combustion air to the combustion device and adjust the air intake through the air valve 66. The external cold air enters the impeller 3 through the first opening 421, the air inlet chamber, the second opening 211, and the rotating shaft 25 (as shown in FIG. Figure 3 The external cold air enters the impeller 3 through the first opening 421, the air inlet chamber, the second opening 211, and the rotating shaft 25 (as shown in the direction B). Figure 3 As shown in the direction B in the middle), during this process, the temperature of the external cooling air rises after absorbing the heat from the end cover 21 of the motor 2. The temperature of the air entering the impeller 3 is higher than that of the external cold air, which increases the temperature of the combustion air and reduces the activation energy required for the chemical reaction between the methane burner and oxygen, thereby making the gas water heater 6 burn more fully and improving the combustion efficiency of the gas water heater 6. Figure 8 As shown, the water inlet pipe 61 of the gas water heater 6 is connected to the pipe 411 on the radiator 41. The water in the water inlet pipe 61 enters the gas water heater 6 after passing through the heat sink 4, and flows out from the water outlet pipe 62 after being heated. When the water inlet pipe 61 of the gas water heater 6 is connected to the pipe 411 on the radiator 41, the water in the water inlet pipe 61 enters the gas water heater 6 after passing through the heat sink 4. After passing through the heat sink 4, the water in the water inlet pipe 61 of the gas water heater 6 can heat the cold water and utilize the waste heat, making the water heater more energy-efficient and also ensuring that the gas water heater 6 burns more fully.

[0075] like Figure 8As shown, the gas water heater 6 includes a burner, a heat exchanger, and an air collecting hood 67. The burner is located at the bottom, the air collecting hood 67 is located at the top, and the heat exchanger is located above the burner. The water in the gas water heater 6 undergoes three stages of heating from the water inlet pipe 61 to the water outlet pipe 62. In the first stage, the water in the water inlet pipe 61 exchanges heat with the heat dissipation device 4 on the fan assembly 1 to achieve the first temperature rise; in the second stage, the water in the water inlet pipe 61 flows through the combustion area and exchanges heat with the heat exchanger to achieve the second temperature rise; in the third stage, above the burner, near the air collecting hood 67, the high-temperature flue gas after combustion exchanges heat with the water in the water inlet pipe 61 for the third time, achieving the third temperature rise; after the water in the water inlet pipe 61 is heated in three stages, it flows out through the water outlet pipe 62. The gas water heater provided by the present invention fully utilizes the heat emitted by the fan assembly 1, not only achieving preheating utilization but also improving the combustion efficiency of the burner of the gas water heater 6.

[0076] Although specific embodiments of the present invention have been described above, those skilled in the art will appreciate that these are merely illustrative and that the scope of the present invention is defined by the appended claims. Those skilled in the art may make various changes or modifications to these embodiments without departing from the principles and essence of the present invention, and such changes and modifications are intended to fall within the scope of the present invention.

Claims

1. A fan assembly, characterized in that: It includes: a motor, wherein the motor drives the impeller to rotate, and the motor has an end cover, and a circuit board is disposed in the end cover; a heat dissipation device, the heat dissipation device being at least partially disposed in the end cover and being used to dissipate heat from the motor; a heat conducting device, the heat conducting device being disposed inside the end cover, with one end of the heat conducting device abutting against the heat dissipation device and the other end of the heat conducting device being disposed close to the circuit board; the heat conducting device being used to transfer heat from the circuit board to the heat dissipation device; The heat conduction device includes a heat conduction spring and a heat conduction sheet, one end of the heat conduction spring is connected to the circuit board, the other end of the heat conduction spring is connected to the heat conduction sheet, and the side of the heat conduction sheet away from the heat conduction spring is in contact with the heat dissipation device; The heat conducting sheet extends downwardly along the side wall in the circumferential direction thereof, and the inner side surface of the side wall is sleeved on the coil frame of the motor; The heat dissipation device includes a radiator and a connecting portion, wherein the radiator is located above the connecting portion, the lower portion of the connecting portion is located within the end cover, the upper portion of the connecting portion is located on the end cover and forms an air inlet chamber with the end cover, and a plurality of first openings are formed on the circumference of the upper portion of the connecting portion; the end cover is provided with a mounting hole, and the connecting portion of the heat dissipation device abuts against the heat conducting sheet through the mounting hole; The radiator is a water-cooled radiator, and a pipe is arranged on the radiator.

2. The fan assembly according to claim 1, wherein: The heat conducting plate extends downwardly along the side wall in the circumferential direction thereof, and the outer side surface of the side wall abuts against the inner side surface of the end cover of the motor.

3. The fan assembly according to claim 1, wherein: A heat-conducting insulating sheet is provided at one end of the heat-conducting spring connected to the circuit board, and a heat sink is provided at one end of the heat-conducting spring connected to the heat-conducting sheet.

4. The fan assembly according to claim 1, wherein: A second opening is provided on the top of the end cover, and a through hole is provided through the rotating shaft of the motor along the length direction, and the rotating shaft is connected to the second opening.

5. A gas water heater, characterized in that: The fan assembly comprises the fan assembly according to any one of claims 1 to 4.

6. The gas water heater according to claim 5, characterized in that The fan assembly is connected to the combustion device and is used to provide combustion-supporting air to the combustion device. The water inlet pipe of the gas water heater is connected to the pipe on the radiator. The water in the water inlet pipe enters the gas water heater after passing through the radiator.

Images