Axial flow fan assembly and air source heat pump water heater

Abstract

The utility model discloses an axial flow fan assembly and an air source heat pump water heater in the technical field of heat pumps. The device comprises a fan, a motor, a top plate and a motor support, the fan is in driving connection with the motor, the motor is connected to the top plate through the motor support, the motor support comprises a motor mounting disc and a plurality of supporting frames, the motor mounting disc is used for being connected with the motor, and the supporting frames are connected to the periphery of the motor mounting disc. The rubber vibration reduction block comprises a first limiting part and a second limiting part, the first limiting part and the second limiting part are connected through a connecting part, a through hole matched with the connecting part is formed in the top plate, the first limiting part and the second limiting part are located above and below the top plate respectively, and a fixing hole site is formed in a supporting frame of the motor support. And the second limiting part is in interference fit with the fixing hole site, so that the supporting frame is connected to the second limiting part in a sleeving manner. And the conventional rigid connection of the motor bracket and the top plate through bolts is replaced, so that low-frequency noise is avoided, and a certain degree of vibration reduction effect is achieved.

Description

Technical Field

[0001] The utility model relates to the technical field of heat pumps, in particular to an axial flow fan component and an air source heat pump water heater. Background Art

[0002] Air source heat pump water heater is an energy-saving and environmentally friendly hot water supply device that can replace boilers and is not limited by resources. It uses green and pollution-free refrigerant, absorbs heat from the air, and produces domestic hot water above 50 degrees through the compressor. It is suitable for indoor swimming pools, hotels, villas, hair salons, bathing and foot massage, factories, schools, farms and other places that need hot water supply.

[0003] The frame of the air source heat pump water heater unit is composed of columns, which are installed on the base as the support of the whole machine. A circle of crossbeams are provided on the top of the columns as the support for the stability of the frame. At present, based on the demand for cost reduction, the circle of crossbeams on the top is cancelled, and the axial fan assembly is directly connected to the column of the unit. The crossbeam is replaced by the top plate of the axial fan assembly and used as the crossbeam for stabilizing the frame of the unit. Since the unit has a top air outlet structure, when it is installed in a place with obstacles at the top, the fan is easily affected by the wind resistance force and loses balance, and then transmits the vibration to the entire unit, causing the system pipeline of the unit to shake and then break; and since the motor bracket on the axial fan is fixed to the top plate with a rigid connection, it is easy to generate low-frequency noise. Utility Model Content

[0004] In order to overcome the problem that low-frequency noise is easily generated after the existing air source heat pump water heater removes the crossbeam structure, the utility model provides an axial flow fan assembly and an air source heat pump water heater to take into account both cost reduction and noise reduction requirements.

[0005] The technical solution adopted by the utility model to solve its technical problems is:

[0006] An axial flow fan assembly comprises a fan, a motor, a top plate and a motor bracket. The fan is driven and connected to the motor. The motor is connected to the top plate through the motor bracket. The motor bracket comprises a motor mounting plate and a plurality of support frames. The motor mounting plate is used to connect to the motor. The support frame is connected to the outer periphery of the motor mounting plate and further comprises a rubber vibration damping block. The rubber vibration damping block comprises a first limiting portion and a second limiting portion. The first limiting portion and the second limiting portion are connected through a connecting portion. A through hole matching the connecting portion is provided on the top plate. The first limiting portion and the second limiting portion are respectively located above and below the top plate. A fixing hole is provided on the support frame of the motor bracket. The second limiting portion and the fixing hole are interference fit so that the support frame is sleeved on the second limiting portion.

[0007] In the present application, the motor bracket is connected to the top plate through a rubber vibration damping block. Specifically, the support frame of the motor bracket is sleeved on the second limit portion of the rubber vibration damping block. This replaces the rigid connection of the motor bracket and the top plate through bolts in the prior art, avoids the generation of low-frequency noise, and has a certain degree of vibration reduction effect. When applied to an air source heat pump water heater without a crossbeam, the effect is more significant.

[0008] In some embodiments, the first limiting portion, the second limiting portion and the connecting portion are three cylinders with overlapping axes, the cross section of the first limiting portion is larger than the cross section of the second limiting portion, and the cross section of the second limiting portion is larger than the cross section of the connecting portion.

[0009] In this embodiment, the rubber vibration damping block is composed of three cylinders of different sizes to facilitate processing and implementation; specifically, the cross-section of the connecting portion is smaller than the cross-section of the second limiting portion, and the cross-section of the second limiting portion is smaller than the cross-section of the first limiting portion.

[0010] In some embodiments, a chamfer transition is formed between the lower end surface and the side surface of the second limiting portion.

[0011] In this embodiment, a chamfer is provided at the lower end of the second limiting portion to facilitate the motor bracket to be sleeved on the second limiting portion.

[0012] In some embodiments, bolts and nuts are also included. A through hole is vertically arranged in the center of the rubber vibration damping block for the bolt to pass through. The bolt head and the nut are respectively arranged on the upper and lower sides of the rubber vibration damping block.

[0013] In this embodiment, a through hole is vertically arranged in the center of the rubber vibration damping block so that bolts and nuts can limit its upper and lower positions, so that the rubber vibration damping block can be compressed and absorb energy during vibration, thereby improving the vibration damping effect.

[0014] In some embodiments, the bolt is a step bolt, the bolt head is arranged above the rubber vibration damping block, the threaded section is located at the lower end of the step bolt, and the distance between the uppermost threaded section and the lower end surface of the second limiting portion is 0.5mm-2mm.

[0015] In this embodiment, the bolt is a step bolt, the bolt head is arranged above the rubber damping block, and the threaded section is located at the lower end of the step bolt. The step bolt and the rubber damping block are selected or designed accordingly so that the distance between the upper end of the threaded section and the lower end face of the second limiter is controlled to be 0.5mm-2mm. When in use, the nut is screwed to the upper end of the threaded section. At this time, there is a gap of 0.5-2mm between the rubber damping block and the fixed end face of the nut, so that the rubber damping block releases more energy when vibrated. In addition, the step bolt and the rubber damping block are more convenient to match and easier to assemble.

[0016] In some embodiments, the motor bracket includes a motor mounting plate and four support frames. In a top view, the four support frames are symmetrically distributed on the outer periphery of the motor mounting plate in the vertical and left-right directions.

[0017] In this embodiment, the motor bracket includes four support frames, and the four support frames are symmetrically distributed to evenly bear the force.

[0018] In some embodiments, in a top view, the angle between two adjacent support frames is not less than 60°.

[0019] In this embodiment, the angle between two adjacent support frames is limited to not less than 60°. Combined with the symmetrical distribution of the four support frames in the vertical direction and in the horizontal direction, the angle between two adjacent support frames is 60°-120°, so as to improve the reliability of the support frames.

[0020] In some embodiments, the support frame 72 is made of flat steel with a thickness greater than 8 mm, and further includes four reinforcing ribs, each of which connects the middle parts of two adjacent support frames.

[0021] In this embodiment, reinforcing ribs are added between adjacent support frames to improve the overall performance of the motor bracket and further enhance the vibration reduction effect.

[0022] In some embodiments, the distribution positions of the four support frames correspond to the diagonal distribution positions of the top plate.

[0023] In this embodiment, the distribution of the four support frames is consistent with the diagonal distribution of the top plate to optimize the force effect.

[0024] The utility model also provides an air source heat pump water heater, comprising the axial flow fan assembly in any of the above embodiments, wherein the top plate side of the axial flow fan assembly is bent downward to be connected to the column of the air source heat pump water heater.

[0025] In this embodiment, the side of the axial flow fan assembly is bent downward and connected to the column. The air source heat pump water heater is not provided with a crossbeam, and the aforementioned axial flow fan assembly provides a more suitable effect of reducing low-frequency noise and vibration.

[0026] The beneficial effects of the utility model are:

[0027] 1. The motor bracket and the top plate are flexibly connected by a rubber damping block, replacing the existing rigid connection, to reduce the occurrence of low-frequency noise; further, the rubber damping block is configured such that the second limiter and the first limiter are connected by a connecting portion, and the three are cylinders of different sizes and specifications, which are convenient for processing and implementation; a chamfer is provided at the lower end of the second limiter to facilitate the sleeve connection of the motor bracket. The aforementioned axial flow fan assembly is used for an air source heat pump water heater, and a crossbeam does not need to be provided at the upper end of the column, which can take into account both cost reduction and noise reduction requirements.

[0028] 2. The rubber vibration damping block is provided with a vertical through hole, and is limited up and down by bolts and nuts to assist it in compressing and absorbing energy during vibration, thereby improving the vibration damping effect; further, the bolt is a stepped bolt to facilitate its cooperation with the rubber vibration damping block, and on the other hand, to facilitate controlling the gap between the nut and the second limiting portion to optimize the vibration damping effect.

[0029] 3. The motor bracket is equipped with four support frames, which are symmetrical up and down and left and right; the angle between adjacent support frames is not less than 60°; additional reinforcing ribs are added to connect adjacent support frames; the layout of the support frames corresponds to the diagonal layout of the top plate. The above measures improve the uniform force of the support frames and the reliability of use. BRIEF DESCRIPTION OF THE DRAWINGS

[0030] Figure 1 An exploded view of an axial flow fan assembly provided in Embodiment 1 of the present utility model;

[0031] Figure 2 for Figure 1 Schematic diagram of the structure of the middle rubber vibration damping block;

[0032] Figure 3 for Figure 1 Schematic diagram of the structure of the middle step bolt;

[0033] Figure 4 for Figure 1 Schematic diagram of the structure of the motor bracket Figure 1 ;

[0034] Figure 5 This is a schematic diagram of the connection structure between the motor bracket and the top plate in the first embodiment of the utility model;

[0035] Figure 6 for Figure 1 Schematic diagram of the structure of the motor bracket Figure 2 ;

[0036] Figure 7 A schematic diagram of the structure of an air source heat pump water heater provided in the second embodiment of the present utility model;

[0037] Figure 8 This is an exploded view of the air source heat pump water heater provided in the second embodiment of the present utility model.

[0038] Marked in the figure, 0-axial flow fan assembly, 1-step bolt, 11-threaded section, 2-rubber vibration damping block, 21-first limiting portion, 22-connecting portion, 23-second limiting portion, 3-air outlet mesh cover, 4-top plate, 5-fan, 6-motor, 7-motor bracket, 71-motor mounting plate, 72-support frame, 721-fixing hole, 73-reinforcement rib, 8-air source heat pump water heater, 9-column. DETAILED DESCRIPTION

[0039] The utility model is further described below in conjunction with the accompanying drawings.

[0040] In order to make the purpose, technical solution and advantages of the utility model more clear, the utility model is further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described here are only used to explain the utility model and are not used to limit the utility model.

[0041] Embodiment 1

[0042] like Figure 1-Figure 6 As shown, the utility model provides an axial flow fan assembly.

[0043] like Figure 1 As shown, the axial fan assembly 0 includes a fan 5, a motor 6, a top plate 4 and a motor bracket 7. The fan 5 is connected to the motor 6 by driving. The motor 6 is connected to the top plate 4 through the motor bracket 7. The motor bracket 7 includes a motor mounting plate 71 and a plurality of support frames 72. The motor mounting plate 71 is used to connect with the motor 6. The support frame 72 is connected to the outer periphery of the motor mounting plate 71. It also includes a rubber vibration damping block 2. The rubber vibration damping block 2 includes a first limiting portion 21 and a second limiting portion 23. The first limiting portion 21 and the second limiting portion 23 are connected through a connecting portion 22. A through hole matching the connecting portion 22 is provided on the top plate 4. The first limiting portion 21 and the second limiting portion 23 are respectively located above and below the top plate 4. A fixing hole 721 is provided on the support frame 72 of the motor bracket 7. The second limiting portion 23 and the fixing hole 721 are interference-fitted so that the support frame 72 is sleeved on the second limiting portion 23. An air outlet mesh cover 3 is provided above the fan 5.

[0044] In the present application, the motor bracket 7 is connected to the top plate 4 through the rubber vibration damping block 2 to achieve a flexible connection and achieve a noise reduction effect. Specifically, the support frame 72 of the motor bracket 7 is sleeved on the second limit portion 23 of the rubber vibration damping block 2. It replaces the rigid connection between the motor bracket 7 and the top plate 4 by bolts in the prior art, avoids the generation of low-frequency noise, and achieves a certain degree of vibration reduction effect. When applied to an air source heat pump water heater that eliminates the crossbeam, the effect is more significant. Here, the motor bracket 7 is sleeved on the second limit portion 23, which means that the motor bracket 7 and the second limit portion 23 are interference fit.

[0045] like Figure 2 As shown, in this embodiment, the first limiting portion 21, the second limiting portion 23 and the connecting portion 22 are three cylinders with coincident axes, the cross section of the first limiting portion 21 is larger than the cross section of the second limiting portion 23, and the cross section of the second limiting portion 23 is larger than the cross section of the connecting portion 22. The rubber vibration damping block 2 is composed of three cylinders of different sizes to facilitate processing and implementation.

[0046] Furthermore, in this embodiment, a chamfer transition is formed between the lower end surface and the side surface of the second limiting portion 23 , so that the motor bracket 7 can be sleeved on the second limiting portion 23 .

[0047] In this embodiment, bolts and nuts are also included. A through hole is vertically arranged in the center of the rubber vibration damping block 2 for the bolt to pass through. The bolt head and nut are respectively arranged on the upper and lower sides of the rubber vibration damping block 2. The bolt and nut limit the upper and lower positions of the rubber vibration damping block 2, so that the rubber vibration damping block 2 is compressed and absorbs energy during vibration, thereby improving the vibration reduction effect.

[0048] like Figure 3 and Figure 5 As shown, further, in this embodiment, the bolt is a step bolt 1, the bolt head is arranged above the rubber vibration damping block 2, the threaded section 11 is located at the lower end of the step bolt 1, and the distance between the uppermost threaded section 11 and the lower end surface of the second limiting portion 23 is 0.5mm-2mm. The step bolt 1 and the rubber vibration damping block 2 are selected or designed accordingly, so that the distance between the uppermost end of the threaded section 2 and the lower end surface of the second limiting portion 23 is controlled to be 0.5mm-2mm. When in use, the nut is screwed to the uppermost end of the threaded section 11. At this time, there is a gap of 0.5-2mm between the rubber vibration damping block 2 and the fixed end surface of the nut, so that the rubber vibration damping block 2 releases more energy when vibrated. In addition, the step bolt 1 and the rubber vibration damping block 2 are more convenient to match and easier to assemble.

[0049] like Figure 4 and Figure 6 As shown, in this embodiment, the motor bracket 7 includes a motor mounting plate 71 and four support frames 72. In the top view, the four support frames 72 are symmetrically distributed on the outer periphery of the motor mounting plate 71, so that the motor bracket 7 is evenly stressed.

[0050] Furthermore, in this embodiment, in the top view, the angle between two adjacent support frames 72 is not less than 60°. Combined with the symmetrical distribution of the four support frames 72 in the vertical direction and in the horizontal direction, the angle between two adjacent support frames 72 is 60°-120°, so as to improve the reliability of the support frames 72.

[0051] Furthermore, in this embodiment, the support frame 72 is made of flat steel with a thickness greater than 8 mm, and further includes four reinforcing ribs 73, each of which connects the middle parts of two adjacent support frames 72. The reinforcing ribs 73 are added between adjacent support frames 72 to improve the overall performance of the motor bracket 7 and further improve the vibration reduction effect.

[0052] Furthermore, in this embodiment, the distribution positions of the four support frames 72 correspond to the diagonal distribution positions of the top plate 4 to optimize the force effect.

[0053] Embodiment 2

[0054] like Figure 7 and Figure 8 As shown, the utility model also provides an air source heat pump water heater 8, comprising the axial flow fan assembly 0 in the first embodiment, wherein the top plate 4 of the axial flow fan assembly 0 is bent downwardly to be connected to the column 9 of the air source heat pump water heater 8.

[0055] In this embodiment, the air source heat pump water heater 8 is not provided with a crossbeam, and the top plate 4 of the axial flow fan assembly 0 is bent downward on its side and connected to the column 9. The low-frequency noise reduction and vibration reduction effects provided by the axial flow fan assembly 0 in the aforementioned embodiment 1 are more suitable for this scenario. This allows the air source heat pump water heater 8 to take into account cost reduction, noise reduction, and avoid the problem of vibration causing the unit system pipeline to break.

[0056] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. An axial flow fan assembly, comprising a fan (5), a motor (6), a top plate (4) and a motor bracket (7), wherein the fan (5) and the motor (6) are connected by driving, the motor (6) is connected to the top plate (4) through the motor bracket (7), the motor bracket (7) comprises a motor mounting plate (71) and a plurality of support frames (72), the motor mounting plate (71) is used to be connected to the motor (6), and the support frames (72) are connected to the outer periphery of the motor mounting plate (71), wherein: The invention also comprises a rubber vibration damping block (2), wherein the rubber vibration damping block (2) comprises a first limiting portion (21), a second limiting portion (23) and a connecting portion (22), wherein the first limiting portion (21) and the second limiting portion (23) are connected via the connecting portion (22), a through hole matching the connecting portion (22) is provided on the top plate (4), the first limiting portion (21) and the second limiting portion (23) are respectively located above and below the top plate (4), a fixing hole (721) is provided on the support frame (72) of the motor bracket (7), and the second limiting portion (23) and the fixing hole (721) are interference-fitted so that the support frame (72) is sleeved on the second limiting portion (23).

2. The axial flow fan assembly according to claim 1, characterized in that: The first limiting portion (21), the second limiting portion (23) and the connecting portion (22) are three cylindrical bodies with coincident axes; the cross section of the first limiting portion (21) is larger than the cross section of the second limiting portion (23); and the cross section of the second limiting portion (23) is larger than the cross section of the connecting portion (22).

3. The axial flow fan assembly according to claim 2, characterized in that: A chamfered transition is formed between the lower end surface and the side surface of the second limiting portion (23).

4. The axial flow fan assembly according to any one of claims 1 to 3, characterized in that: It also comprises bolts and nuts. A through hole is vertically arranged at the center of the rubber vibration damping block (2) for the bolt to pass through. The bolt head and the nut are respectively arranged on the upper and lower sides of the rubber vibration damping block (2).

5. The axial flow fan assembly according to claim 4, characterized in that: The bolt is a stepped bolt (1), the bolt head is arranged above the rubber vibration damping block (2), the threaded section (11) is located at the lower end of the stepped bolt (1), and the distance between the uppermost threaded section (11) and the lower end surface of the second limiting portion (23) is 0.5 mm-2 mm.

6. The axial flow fan assembly according to claim 1, wherein: The motor bracket (7) comprises a motor mounting plate (71) and four support frames (72). In a top view, the four support frames (72) are symmetrically distributed on the outer periphery of the motor mounting plate (71) in the vertical and left-right directions.

7. The axial flow fan assembly according to claim 6, characterized in that: In a top view, the angle between two adjacent support frames (72) is not less than 60°.

8. The axial flow fan assembly according to claim 6, wherein: The support frame (72) is made of flat steel with a thickness greater than 8 mm, and further comprises four reinforcing ribs (73), each reinforcing rib (73) connecting the middle parts of two adjacent support frames (72).

9. The axial flow fan assembly according to claim 6, wherein: The distribution positions of the four support frames (72) correspond to the diagonal distribution positions of the top plate (4).

10. Air source heat pump water heater, characterized by: It comprises an axial flow fan assembly (0) as described in any one of claims 1 to 9, wherein the top plate (4) of the axial flow fan assembly (0) is bent downwardly at its side to be connected to a column (9) of an air source heat pump water heater (8).

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