Fan and gas water heating equipment

Abstract

The utility model belongs to the technical field of heat supply, and particularly discloses a fan and gas water heating equipment. The fan comprises a base assembly and a wind wheel rotor assembly. The base assembly comprises a stator assembly and a base integrally formed with the stator assembly through injection molding, the base is provided with an air inlet, an air cavity and an air outlet which are communicated with one another, the base is provided with a central through hole with two through ends, the stator assembly is arranged around the central through hole, the base at least wraps the two axial ends of the stator assembly, and the air cavity is arranged around the stator assembly; the wind wheel rotor assembly comprises a base plate, a magnetic rotor, a rotating shaft arranged on the base plate and a wind wheel integrally formed with the base plate in an injection molding mode, the rotating shaft penetrates through the center through hole and is rotationally installed on the base, the magnetic rotor is embedded in the inner circumference of the wind wheel and surrounds the outer side of the stator assembly, and the wind wheel is arranged in the wind cavity. According to the draught fan and the gas water heating equipment, the use reliability of the draught fan can be improved, the service life of the draught fan can be prolonged, and the assembling efficiency of the draught fan is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of fans, in particular to a fan and a gas water heating device Background Art

[0002] A gas water heater is a device that exchanges heat between the high-temperature flue gas generated by gas combustion and the water flowing through a heat exchanger to achieve hot water supply. It usually includes a burner, a heat exchanger, and a fan, where the fan is used to guide the high-temperature flue gas generated by combustion at the burner to flow through the heat exchanger

[0003] To reduce the floor space occupied by the fan, the prior art provides an external magnetic rotor fan, which includes a volute, a wind wheel arranged on the volute, a magnetic rotor assembly embedded on the wind wheel, and a stator assembly fitted on the wind wheel. The stator assembly includes an iron core and a plurality of stator windings wound around the iron core

[0004] In the external magnetic rotor fan provided by the prior art, the stator assembly is installed at the center of the wind wheel, so that the stator assembly is arranged facing the air inlet. When the fan operates, the high-temperature flue gas enters the fan through the air inlet, and the high-temperature flue gas flows through the stator assembly during the flowing process, making the stator assembly vulnerable to corrosion by oil fume and water vapor, affecting the service life and long-term use safety of the stator assembly; at the same time, in the external magnetic rotor fan provided by the prior art, during assembly, the stator assembly needs to be first installed inside the magnetic rotor, and then the wind wheel is assembled inside the volute, resulting in a low overall assembly efficiency Summary of the Utility Model

[0005] One of the technical problems to be solved by the utility model is to provide a fan that can effectively solve the problems of easy corrosion of the stator assembly in the fan and low assembly efficiency existing in the prior art, improve the use safety of the fan, and at the same time improve the assembly efficiency of the fan

[0006] Another technical problem to be solved by the utility model is to provide a gas water heating device that can effectively solve the problems of reduced use reliability and high maintenance and replacement costs of the gas water heating device caused by low service life and low use safety of the fan, improve the use reliability of the gas water heating device, and reduce the maintenance and replacement costs of the gas water heating device

[0007] The above first technical problem is solved by the following technical solutions

[0008] A fan, comprising:

[0009] The base assembly includes a stator assembly and a base integrally injection-molded with the stator assembly. An air inlet, an air cavity, and an air outlet that communicate with each other are provided on the base. The base is provided with a central through-hole that penetrates through both ends. The stator assembly is arranged around the central through-hole, and the base at least wraps the axial two ends of the stator assembly. The air cavity is arranged around the stator assembly;

[0010] The wind wheel rotor assembly includes a substrate, a magnetic rotor, a rotating shaft arranged on the substrate, and a wind wheel integrally injection-molded with the substrate. The rotating shaft passes through the central through-hole and is rotatably installed on the base. The magnetic rotor is embedded in the inner circumference of the wind wheel and arranged around the outside of the stator assembly. The wind wheel is placed in the air cavity.

[0011] Compared with the background art, the gas wall-mounted boiler of the present utility model has the following beneficial effects: Since the stator assembly is arranged around the central through-hole and the wind wheel is arranged around the outside of the stator assembly, an external magnetic rotor fan structure is formed for the fan. The rotating shaft, the stator assembly, the magnetic rotor, and the wind wheel are sleeved in sequence from the inside to the outside, so that the overall floor space of the fan is small and the structural compactness is high; at the same time, since the stator assembly is integrally formed with the base and the base at least wraps the axial two ends of the stator assembly, the stator assembly is wrapped inside the base, effectively reducing the part of the stator assembly exposed in the air cavity, enabling the coil inside the stator assembly to be non-exposed, thereby avoiding contact between the stator assembly and the flue gas after the flue gas enters the air cavity, reducing the probability of corrosion of the stator assembly by the flue gas and water vapor, improving the use safety and service life of the stator assembly, and thus improving the use safety and service life of the fan; furthermore, since the stator assembly is integrally injection-molded on the base, the stator assembly and the base form an integral structure without additional assembly. During the assembly process of the fan, only the wind wheel rotor assembly needs to be assembled onto the base, effectively simplifying the assembly process of the fan and improving the assembly and disassembly efficiency of the fan.

[0012] In one embodiment, the base has two mounting grooves arranged around the central through-hole, and the two mounting grooves are respectively located on the opposite sides of the stator assembly in the axial direction; two bearing units are sleeved on the rotating shaft, and the two bearing units are respectively and limit-mounted in the two mounting grooves.

[0013] In one embodiment, an axial limiting member is detachably connected to one end of the rotating shaft away from the air inlet. One end face of the bearing unit away from the air inlet abuts against the axial limiting member, and an elastic washer is pressed between the other end face and the bottom of the corresponding mounting groove.

[0014] In one embodiment, the base is provided with an electrically controlled installation cavity which is spaced around the outside of the central through hole and located on the side of the stator assembly away from the air inlet. A circuit board is installed in the electrically controlled installation cavity, and the circuit board is electrically connected to the stator assembly through a conductive structure. At least part of the conductive structure is injection-molded and wrapped inside the base.

[0015] In one embodiment, the conductive structure includes a pin and a wire. The first end of the pin is injection-molded and wrapped inside the base. The second end of the pin is electrically connected to the circuit board. One end of the wire is connected to the coil of the stator assembly, and the second end of the wire is wound around the pin.

[0016] In one embodiment, the blower further includes a protective cover which is detachably connected to the base and blocks the opening of the electrically controlled installation cavity.

[0017] In one embodiment, a mounting boss portion protrudes from the outside of the base. The mounting boss portion is provided with a mounting hole. The blower further includes an elastic sleeve which is axially and throughly provided with a fixing through hole. The elastic sleeve is fitted into the mounting hole and both ends extend out of the mounting hole.

[0018] In one embodiment, ventilation holes are provided on the side of the base facing away from the air inlet. The ventilation holes communicate with the air cavity. A plurality of ventilation holes are arranged at intervals around the axis of the rotating shaft. And in the projection plane perpendicular to the axis of the rotating shaft, the orthographic projection of the ventilation holes on the projection plane is located outside the orthographic projection range of the stator assembly on the projection plane.

[0019] And / or, the base includes a volute main body and a mounting seat integrally injection-molded. The volute main body has the air inlet and the air outlet. The mounting seat protrudes inside the volute main body and faces the air inlet. The mounting seat is integrally injection-molded with the stator assembly, and the mounting seat has the central through hole.

[0020] In one embodiment, the rotating shaft is integrally injection-molded with the substrate, and the wind wheel is integrally injection-molded with the magnetic rotor.

[0021] And / or, the substrate has a positioning step surface which is vertically connected to the inner side wall of the wind wheel. One end of the magnetic rotor abuts against the positioning step surface, and the outer side surface of the magnetic rotor fits with the inner side wall of the wind wheel.

[0022] The above second technical problem is solved by the following technical solutions:

[0023] A gas water heating device includes the blower as described above.

[0024] Compared with the background art, the gas water heating device of the present utility model has the following beneficial effects: By adopting the above-mentioned fan, the safety and reliability of the gas water heating device can be improved, and the service life of the gas water heating device can be prolonged. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] Figure 1 It is a schematic structural view of the fan provided by an embodiment of the present utility model;

[0026] Figure 2 It is a cross-sectional view of the fan provided by an embodiment of the present utility model;

[0027] Figure 3 is Figure 2 a partial enlarged view of I in

[0028] Figure 4 It is a cross-sectional structural view of the wind wheel rotor assembly provided by an embodiment of the present utility model;

[0029] Figure 5 It is a cross-sectional view of the base assembly provided by an embodiment of the present utility model;

[0030] Figure 6 is Figure 5 a partial enlarged view of J in

[0031] Figure 7 It is a schematic structural view of the fan provided by an embodiment of the present utility model from another perspective.

[0032] Reference numeral description:

[0033] 1. Base assembly; 11. Base; 111. Volute main body; 1111. Ventilation hole; 1112. Air cavity; 1113. Air outlet; 112. Mounting seat; 1121. Central through hole; 1122. Mounting groove; 1122a. First mounting groove; 1122b. Second mounting groove; 1123. Electric control mounting cavity; 113. Mounting column part; 1131. Support column part; 1132. Positioning column part; 114. Mounting boss part; 1141. Mounting plate part; 1142. Connecting rib plate part; 1143. Mounting hole; 115. First fixing ear; 12. Stator assembly; 121. Iron core; 122. Coil; 123. Conductive structure; 1231. Plug pin; 1232. Conductive wire;

[0034] 2. Wind wheel rotor assembly; 21. Rotating shaft; 22. Substrate; 221. Main board part; 222. Convex column part; 223. Positioning ring part; 23. Wind wheel; 231. Inner cylinder part; 232. Connecting ring part; 233. Blade; 234. Connecting rib part; 24. Magnetic rotor;

[0035] 3. Bearing unit; 3a. First bearing unit; 3b. Second bearing unit;

[0036] 4. Elastic washer; 5. Circuit board; 6. Air inlet cover plate; 61. Air inlet through hole; 62. Second fixing ear; 7. Protective cover; 71. Cover plate part; 72. Inner ring part; 73. Outer ring part; 8. Elastic sleeve; 81. Annular clamping groove; 82. Fixing through hole; 9. Axial limiting part; 10. External connector; 20. Copper nut. Detailed implementation manners

[0037] Next, the technical solutions in the embodiments of the present application will be clearly and completely described with reference to the accompanying drawings in the embodiments of the present application. Obviously, the described embodiments are only a part of the embodiments of the present application, rather than all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present application.

[0038] In the description of the present application, it should be understood that the orientation or positional relationship indicated by the terms "center", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc. is based on the orientation or positional relationship shown in the accompanying drawings, and is only for the convenience of describing the present application and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus should not be construed as a limitation to the present application.

[0039] The terms "first" and "second" are only used for descriptive purposes, and cannot be understood as indicating or implying relative importance or implicitly specifying the quantity of the indicated technical features. Thus, the features defined with "first" and "second" may explicitly or implicitly include one or more of such features. In the description of the present application, unless otherwise specified, the meaning of "plurality" is two or more.

[0040] In the description of the present application, it should be noted that, unless otherwise clearly defined and limited, the terms "mounted", "connected" and "connected" should be understood in a broad sense. For example, it may be a fixed connection, a detachable connection, or an integral connection; it may be a mechanical connection or an electrical connection; it may be directly connected, or indirectly connected through an intermediate medium, and it may be the communication inside two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the present application can be understood according to specific situations.

[0041] The present utility model provides a blower, which can be applied to gas water heating equipment to guide the flue gas to flow through a heat exchanger, so as to heat the water flowing through the heat exchanger. The gas water heating equipment can be, but is not limited to, a gas water heater or a gas wall-mounted boiler, etc. The blower can also be applied to other scenarios for realizing air flow. The application scenario of the blower in this embodiment is not specifically limited.

[0042] Specifically, as Figures 1 to 3 , the blower includes a base assembly 1 and a wind wheel rotor assembly 2. Among them, the base assembly 1 includes a stator assembly 12 and a base 11 integrally injection-molded with the stator assembly 12. An air inlet, an air cavity 1112 and an air outlet 1113 that communicate with each other are provided on the base 11. The base 11 is provided with a central through hole 1121 that penetrates through both ends. The stator assembly 12 is disposed around the central through hole 1121, and the base 11 at least wraps the axial two ends of the stator assembly 12. The air cavity 1112 is disposed around the stator assembly 12. The wind wheel rotor assembly 2 includes a substrate 22, a magnetic rotor 24, a rotating shaft 21 disposed on the substrate 22, and a wind wheel 23 integrally injection-molded with the substrate 22. The rotating shaft 21 passes through the central through hole 1121 and is rotatably installed on the base 11. The magnetic rotor 24 is embedded in the inner circumference of the wind wheel 23 and disposed around the outside of the stator assembly 12. The wind wheel 23 is placed in the air cavity 1112.

[0043] For the blower provided in this embodiment, since the stator assembly 12 is disposed around the central through hole 1121 and the wind wheel 23 is disposed around the outside of the stator assembly 12, an external magnetic rotor 24 blower structure is formed for the blower. The rotating shaft 21, the stator assembly 12, the magnetic rotor 24 and the wind wheel 23 are sleeved in sequence from the inside to the outside, so that the overall occupied space of the blower is small and the structural compactness is high. At the same time, since the stator assembly 12 is integrally formed with the base 11, and the base 11 at least wraps the axial two ends of the stator assembly 12, the stator assembly 12 is wrapped inside the base 11, effectively reducing the part of the stator assembly 12 exposed to the air cavity 1112, so that the coil 122 inside the stator assembly 12 can be non-exposed, thereby avoiding contact between the flue gas and the stator assembly 12 after entering the air cavity 1112, reducing the probability of corrosion of the stator assembly 12 by the flue gas and water vapor, improving the use safety and service life of the stator assembly 12, and thus improving the use safety and service life of the blower. Moreover, since the stator assembly 12 is integrally injection-molded on the base 11, the stator assembly 12 and the base 11 are in an integral structure and do not require additional assembly. During the assembly process of the blower, only the wind wheel rotor assembly 2 needs to be assembled onto the base 11, effectively simplifying the assembly process of the blower and improving the assembly and disassembly efficiency of the blower.

[0044] In one embodiment, the base 11 includes a volute main body 111 and a mounting base 112 integrally injection-molded. The volute main body 111 has an air inlet and an air outlet 1113 that are sequentially communicated, and the air outlet 1113 is arranged on the side wall of the volute; the mounting base 112 protrudes inside the volute main body 111 and the air inlet is arranged. The mounting base 112 is integrally injection-molded with the stator assembly 12, and the above-mentioned central through hole 1121 is arranged on the mounting base 112. The outer side wall of the mounting base 112 and the inner side wall of the volute main body 111 enclose an air cavity 1112. The mounting base 112 wraps the axial two ends of the stator assembly 12. Forming the mounting base 112 by injection molding is beneficial to realizing the wrapping of the stator assembly 12 and is also beneficial to realizing the installation of the wind wheel rotor assembly 2 on the base 11.

[0045] It should be noted that the stator assembly 12 includes an iron core 121 and coils 122 wound around the iron core 121. A plurality of coils 122 are arranged at intervals along the axis of the stator assembly 12, and a through hole is provided at the center of the iron core 121. When the base 11 is injection-molded, the injection material fills the gaps between adjacent coils 122 and the gaps between the coils 122 and the iron core 121, realizing the basic complete wrapping of the coils 122, thereby realizing the isolation of the coils 122 from the external environment, avoiding corrosion of the coils 122, improving the service life of the coils 122, and thus improving the service reliability and service life of the stator assembly 12.

[0046] As Figure 1 shown, in one embodiment, the blower further includes an air inlet cover plate 6. The air inlet cover plate 6 is covered at the air inlet and is detachably connected to the base 11. An air inlet through hole 61 is provided on the air inlet cover plate 6, and the air inlet through hole 61 is coaxially arranged with the rotating shaft 21. The aperture of the air inlet through hole 61 is larger than the inner diameter of the wind wheel 23 and smaller than the outer diameter of the wind wheel 23. Thus, during actual operation, the air flow enters the air cavity 1112 through the air inlet through hole 61. The setting of the air inlet cover plate 6 increases the negative pressure at the air inlet through hole 61, thereby better guiding the air flow into the air cavity 1112; at the same time, the setting of the air inlet cover plate 6 can also prevent the wind wheel rotor assembly 2 from escaping from the air cavity 1112 through the air inlet, ensuring the safety and reliability of the wind wheel rotor assembly 2 during use and improving the use safety of the blower.

[0047] The shape of the air inlet cover plate 6 is basically the same as the end face shape of the air inlet end of the base 11. The air inlet cover plate 6 and the volute main body 111 cooperate to form a volute structure. The specific structural shape of the volute structure can be set with reference to the prior art, which is not the focus of the present invention and will not be elaborated here.

[0048] The air inlet cover plate 6 and the volute main body 111 are detachably connected through a fastening structure to ensure the connection reliability between the air inlet cover plate 6 and the volute main body 111. To improve the connection convenience, a first fixed ear 115 protrudes outward from the air inlet end of the volute main body 111, and a second fixed ear 62 protrudes outward from the outer peripheral edge of the air inlet cover plate 6. A plurality of first fixed ears 115 are arranged at intervals along the circumferential direction of the volute main body 111. The first fixed ears 115 and the second fixed ears 62 are arranged in one-to-one correspondence and are in contact with each other, and the fastening structure connects the first fixed ears 115 and the second fixed ears 62.

[0049] In one embodiment, to realize the connection of the structure at the air outlet 1113 of the blower, copper nuts 20 are embedded by injection molding at the air outlet 1113 of the base 11 and the corresponding position of the air inlet cover plate 6.

[0050] As Figures 2 to 4 shown, in one embodiment, the impeller 23 and the magnetic rotor 24 are integrally formed by injection molding, and the substrate 22 and the rotating shaft 21 are integrally injection molded, so that each part of the impeller 23 and magnetic rotor 24 assembly is integrally formed by injection molding, enabling the impeller rotor assembly 2 not to require additional assembly, effectively improving the modular setting of the impeller rotor assembly 2, simplifying the assembly of the blower, and thus improving the assembly efficiency of the blower; at the same time, the impeller rotor assembly 2 is integrally injection molded, which is conducive to controlling the balance amount, thereby improving the rotational balance of the impeller rotor assembly 2 and reducing the noise during the operation of the blower.

[0051] In one embodiment, the substrate 22 is located on the side of the mounting seat 112 facing the air inlet and is arranged in a closed manner, so that the magnetic rotor 24, the substrate 22 and the impeller 23 enclose a cavity with the opening facing away from the air inlet. The mounting seat 112 and the stator assembly 12 are located in the cavity, which can further isolate the stator assembly 12 from oil fume, reduce the probability of oil fume acting on the stator assembly 12, and further improve the service life of the stator assembly 12.

[0052] To ensure the structural stability and reliability of the connection between the rotating shaft 21 and the substrate 22, the substrate 22 includes a main board portion 221, and a convex column portion 222 protrudes from the center of the main board portion 221. The convex column portion 222 is integrally injection molded on the outside of the rotating shaft 21 to increase the area of the joint between the substrate 22 and the rotating shaft 21, thereby ensuring the structural stability and reliability after the substrate 22 and the rotating shaft 21 are injection molded.

[0053] Furthermore, the convex column portion 222 extends out from the opposite sides of the main board portion 221 along the axial direction of the rotating shaft 21. Thereby, while increasing the contact area between the substrate 22 and the rotating shaft 21, it can avoid the distance between the main board portion 221 and the air inlet being too close to affect the air inlet efficiency. The end face of the convex column portion 222 far from the air inlet forms a limiting step surface.

[0054] In one embodiment, the substrate 22 is generally in a conical structure, with its large end facing the mounting seat 112 and connected to one end of the wind wheel 23. Thereby, while avoiding interference between the substrate 22 and the mounting seat 112, the distance between the outer peripheral edge of the substrate 22 and the air inlet is increased, thus reducing the obstruction to the air inlet at the air inlet caused by the setting of the substrate 22. At the same time, since the outer side surface of the substrate 22 is a conical surface and the top of the conical surface faces the air inlet, it can guide the air flow entering from the air inlet to flow along the substrate 22 into the air cavity 1112, improve the smoothness of the air flow, reduce the air flow resistance and the noise generated by the air flow, and improve the use safety and reliability of the blower.

[0055] The wind wheel 23 includes a plurality of blades 233, and an inner cylinder part 231 and a connecting ring part 232 that are coaxially arranged inside and outside and spaced apart. The inner cylinder part 231 and the connecting ring part 232 are connected by a connecting rib part 234. A plurality of connecting rib parts 234 are arranged at intervals along the circumferential direction of the inner cylinder part 231. One end of the inner cylinder part 231 facing the air inlet is adjacent to the substrate 22. The blades 233 are connected to the connecting ring part 232 and a plurality of them are evenly spaced along the circumferential direction of the connecting ring part 232, and each blade 233 extends axially out of the connecting ring part 232 along the connecting ring part 232. The specific structure of the wind wheel 23 can be set with reference to the prior art, which is not the focus of the present utility model and will not be elaborated here.

[0056] In one embodiment, the substrate 22 has a positioning step surface that is perpendicularly connected to the inner side wall of the wind wheel 23. One end of the magnetic rotor 24 abuts against the positioning step surface, and the outer side surface of the magnetic rotor 24 is attached to the inner side wall of the wind wheel 23. Thereby, the relative position accuracy of the magnetic rotor 24, the wind wheel 23, and the substrate 22 during the processing can be ensured. Specifically, a positioning ring part 223 extends radially outward along the outer peripheral edge of the main board part 221. The positioning ring part 223 is perpendicularly connected to one end of the inner cylinder part 231, and one end face of the positioning ring part 223 forms the positioning step surface.

[0057] Such as Figure 2 And Figure 3As shown in the figure, to improve the installation convenience of the rotating shaft 21 on the mounting base 112, in one embodiment, the mounting base 112 has mounting grooves 1122 that are arranged around and communicate with the central through-hole 1121. There are two mounting grooves 1122 spaced along the axial direction of the central through-hole 1121, and the two mounting grooves 1122 are respectively located on the two axial sides of the stator assembly 12 and the openings of the two mounting grooves 1122 face opposite directions. The fan further includes two bearing units 3. The two bearing units 3 are sleeved on the rotating shaft 21 and are respectively limited and installed in the two mounting grooves 1122. Thus, the rotating shaft 21 is supported by the bearing units 3 to improve the smooth rotation of the wind wheel rotor assembly 2; at the same time, the two bearing units 3 are respectively located on the opposite axial sides of the stator assembly 12, which can improve the force balance when the wind wheel rotor assembly 2 rotates and can prevent the bearing units 3 from interfering with the stator assembly 12.

[0058] For convenience of description, the mounting groove 1122 close to the air inlet in the two mounting grooves 1122 is called the first mounting groove 1122a, and the other mounting groove 1122 is called the second mounting groove 1122b. The bearing unit 3 in the first mounting groove 1122a is the first bearing unit 3a, and the other bearing unit 3 is the second bearing unit 3b.

[0059] The first bearing unit 3a includes one rotating bearing or multiple rotating bearings arranged side by side. In one embodiment, the wind wheel rotor assembly 2 has a limiting step surface. The two axial ends of the first bearing unit 3a respectively abut against the bottom of the first mounting groove 1122a and the limiting step surface. Specifically, the end surface of the convex column part 222 forms the limiting step surface, which can simplify the structural setting of the rotating shaft 21 and make the diameters of the rotating shaft 21 at various places basically the same. In other embodiments, it can also be to set a shaft shoulder at the rotating shaft 21 so that the end surface of the shaft shoulder forms the limiting step surface.

[0060] The second bearing unit 3b includes one rotating bearing or multiple rotating bearings arranged side by side along the axial direction. In one embodiment, an axially limiting member 9 is detachably sleeved on one end of the rotating shaft 21 away from the air inlet. The end of the second bearing unit 3b away from the air inlet abuts against the axially limiting member 9, and an elastic washer 4 is pressed between the other end of the second bearing unit 3b and the bottom of the second mounting groove 1122b, that is, the elastic washer 4 is squeezed between the second bearing unit 3b and the bottom of the second mounting groove 1122b. The setting of the elastic washer 4 can pre-tighten the rotating bearings of the two bearing units 3, thereby ensuring the smooth rotation of the rotating bearings and improving the installation stability and reliability of the rotating bearings and the rotating shaft 21, and thus ensuring the installation reliability and smooth rotation of the wind wheel rotor assembly 2.

[0061] The axial limiting member 9 can be, but is not limited to, a snap ring. The elastic washer 4 can be, but is not limited to, a corrugated washer or other washer structures capable of elastic deformation. The rotating bearing can be, but is not limited to, a deep groove ball bearing, a ball bearing or other types of bearings.

[0062] As Figure 2 , Figure 3 , Figure 5 and Figure 6 As shown in, the base 11 is provided with an electric control installation cavity 1123. The electric control installation cavity 1123 is spaced around the outside of the central through hole 1121 and is located on the side of the stator assembly 12 away from the air inlet. A circuit board 5 is installed in the electric control installation cavity 1123. The circuit board 5 is electrically connected to the stator assembly 12 through a conductive structure 123. At least part of the conductive structure 123 is injection-molded and wrapped in the base 11. The setting of the circuit board 5 can simplify the connection between the electrical components in the fan and the external electrical components, improve the installation and use convenience of the fan, and is more conducive to realizing the energization connection of the stator assembly 12 and the operation control of the fan. At the same time, part of the conductive structure 123 is wrapped inside the base 11, which can reduce the probability of the conductive structure 123 shaking inside the base 11, ensure the setting stability of the conductive structure 123, thereby ensuring the connection stability and reliability between the circuit board 5 and the stator assembly 12, and can prevent oil fume and water vapor from entering the coil 122 through the conductive structure 123, further enhancing the protection of the coil 122. Moreover, the setting of the electric control installation cavity 1123 is conducive to realizing the installation and positioning of the circuit board 5, and reducing the interference probability between the circuit board 5 and other structures, improving the structural compactness.

[0063] In one embodiment, the conductive structure 123 includes a pin 1231 and a wire 1232. The first end of the pin 1231 is injection-molded and wrapped in the base 11. The second end of the pin 1231 is electrically connected to the circuit board 5. One end of the wire 1232 is connected to the coil 122 of the stator assembly 12, and the second end of the wire 1232 is wound around the pin 1231. By setting the pin 1231, the part of the conductive structure 123 extending out of the base 11 is a rigid structure, which is easy to realize the connection between the conductive structure 123 and the circuit board 5 and improve the connection convenience. By setting the wire 1232, it is conducive to realizing the connection between the pin 1231 and the stator assembly 12. In other embodiments, the conductive structure 123 can also adopt other forms of structures, such as a flexible circuit board 5 structure, etc.

[0064] As Figure 2 and Figure 7As shown in the figure, to improve the installation convenience of the circuit board 5, an installation post portion 113 protrudes from the bottom of the electronic control installation cavity 1123. The installation post portion 113 includes a support post portion 1131 and a positioning post portion 1132 that are coaxially connected. A support step surface is formed between the support post portion 1131 and the positioning post portion 1132. The circuit board 5 is supported on the support step surface, and a positioning hole is formed on the circuit board 5. The positioning post portion 1132 is inserted into the positioning hole. Thus, the installation and positioning of the circuit board 5 are realized through the installation post portion 113, and the circuit board 5 is spaced from the bottom of the electronic control installation cavity 1123 to avoid the electrical components on the circuit board 5 rubbing against the bottom of the installation cavity, and at the same time, it is conducive to realizing the heat dissipation of the circuit board 5. The circuit board 5 and the installation post portion 113 are fastened by fastening screws passing through the positioning hole and the positioning post portion 1132, and the screw head of the fastening screw is pressed on the circuit board 5.

[0065] One side of the electronic control installation cavity 1123 away from the air inlet is open, and the circuit board 5 enters and exits the electronic control installation cavity 1123 through this opening, which is conducive to realizing the convenience of loading, unloading and maintenance of the circuit board 5. In an embodiment, to protect the circuit board 5, the blower further includes a protective cover 7. The protective cover 7 is detachably and washably connected to the base 11 and seals the opening of the electronic control installation cavity 1123. Thus, the circuit board 5 is covered and protected by the protective cover 7, reducing the probability of external impurities such as ash layers entering the inside of the mounting seat 112, and improving the operation safety and reliability of the blower. Further, the protective cover 7 seals the notch of the second installation groove 1122b.

[0066] As Figure 2 and Figure 3 shown in the figure, in an embodiment, the protective cover 7 includes a cover plate portion 71, an inner ring portion 72 protruding from the center of the cover plate portion 71, and an outer ring portion 73 protruding from the periphery of the cover plate portion 71. The inner ring portion 72 and the outer ring portion 73 are located on the same side of the cover plate portion 71. The inner ring portion 72 is inserted into the second installation groove 1122b and cooperates with the outer ring groove wall of the second installation groove 1122b. The outer ring portion 73 is inserted into the electronic control installation cavity 1123 and cooperates with the outer ring cavity wall of the electronic control installation cavity 1123. Thus, it is conducive to realizing the installation and positioning of the protective cover 7 on the mounting seat 112, and ensuring the reliability of the inner ring portion 72 and the cover plate portion 71 to cooperate to seal the notch of the second installation groove 1122b, and realizing the sealing reliability of the opening of the electronic control installation cavity 1123 through the cooperation of the outer ring portion 73 and the cover plate portion 71.

[0067] In other embodiments, the protective cover 7 may only include the cover plate portion 71 and the outer ring portion 73, or may only include the cover plate portion 71, or may also only include the cover plate portion 71 and the inner ring portion 72.

[0068] Further, the outer peripheral edge of the cover plate portion 71 protrudes radially outward beyond the outer side of the outer ring portion 73, and the outer surface of the base 11 of the cover plate portion 71 abuts against it, so as to further improve the tightness of the sealing of the opening of the electronic control installation cavity 1123.

[0069] To facilitate the connection between the circuit board 5 and external electrical components, an external connector 10 is provided on the circuit board 5. The external connector 10 is located on the side of the circuit board 5 facing the protective cover 7. An avoidance through hole is provided on the protective cover 7, and the external connector 10 passes through the avoidance through hole and extends outside the electronic control installation cavity 1123.

[0070] As Figure 2 and Figure 7 shown, in one embodiment, ventilation holes 1111 are provided on the side of the volute main body 111 facing the air inlet. The ventilation holes 1111 are located outside the mounting seat 112 and a plurality of them are arranged at intervals around the mounting seat 112. The ventilation holes 1111 communicate with the air cavity 1112. The arrangement of the ventilation holes 1111 enables the fan to intake air from both sides, thereby increasing the air intake volume of the fan and improving the wind force during the operation of the fan; at the same time, the arrangement of the ventilation holes 1111 can also reduce the overall weight of the base assembly 1. In other embodiments, it may not be provided, and only the air inlet side intakes air.

[0071] Further, in the projection plane perpendicular to the rotating shaft 21, the orthographic projection of the ventilation opening on the projection plane is located outside the orthographic projection range of the stator assembly 12 on the projection plane, thereby being able to reduce the probability of oil fume entering the stator assembly 12 and improving the use safety and reliability of the stator assembly 12.

[0072] To enable the installation of the fan on the external structure, the base 11 further includes mounting boss portions 114 protruding from the outer side wall of the volute main body 111. Mounting holes 1143 are provided on the mounting boss portions 114. At least two mounting boss portions 114 are arranged at intervals around the volute main body 111. The mounting boss portions 114 and the volute main body 111 are integrally injection-molded to reduce the processing difficulty.

[0073] In one embodiment, the fan further includes an elastic sleeve 8. The elastic sleeve 8 is installed in the mounting hole 1143 and extends outward from both ends of the mounting hole 1143. The elastic sleeve 8 is provided with a fixing through-hole 82 for passing through mounting fasteners. The elastic sleeve 8 is arranged corresponding to the mounting boss portion 114 one by one. The arrangement of the elastic sleeve 8 enables the fan to be installed on an external structure through the elastic sleeve 8, that is, the fan and the external structure are connected by mounting fasteners passing through the mounting through-hole and the external structure. Since the elastic sleeve 8 is made of an elastic structure, the external structure and the base assembly 1 are separated by the elastic structure. Thus, when the wind wheel rotor assembly 2 rotates, the vibration of the base assembly 1 can be mitigated by the elastic sleeve 8, reducing the probability of the vibration of the base 11 being transmitted to the external structure; at the same time, since the fan is installed on the external structure through the elastic sleeve 8, the connection between the fan and the external structure is a non-rigid connection, which can further reduce the generation of resonance, improve the operation safety and reliability of the fan, and reduce the noise generated during the operation of the fan.

[0074] In one embodiment, the mounting hole 1143 has a lateral opening. The elastic sleeve 8 is squeezed into the mounting opening through the lateral opening, which can reduce the installation difficulty of the elastic sleeve 8 on the base 11 and improve the convenience of disassembling and assembling the elastic sleeve 8 on the base 11. Further, the elastic sleeve 8 includes an annular clamping groove 81. The elastic sleeve 8 forms a clamping sleeve portion at the annular clamping groove 81. The clamping sleeve portion is clamped into the mounting hole 1143, and the opposite side walls of the annular clamping groove 81 are respectively abutted against the opposite opening end faces of the mounting hole 1143. This can limit the axial mounting position of the elastic sleeve 8 relative to the mounting boss portion 114 and improve the convenience of the elastic sleeve 8 being clamped into the mounting hole 1143, further improving the disassembly and assembly efficiency of the elastic sleeve 8.

[0075] In one embodiment, two annular clamping grooves 81 are arranged at intervals along the axial direction of the elastic sleeve 8, which can adjust the position of the mounting elastic sleeve 8 clamped into the mounting hole 1143, thereby improving the installation convenience and flexibility of the fan.

[0076] Further, the cross-section of the fixing through-hole 82 is an oblong hole, and the length direction of the oblong hole is the radial direction of the rotating shaft 21. This can adjust the mounting position of the fan on the external structure, avoid the problem that the mounting through-hole and the fixing hole on the external structure cannot be aligned due to reasons such as opening error or processing error, and further improve the installation convenience and reliability of the fan on the external structure.

[0077] In one embodiment, the mounting boss portion 114 includes two connecting rib plate portions 1142 that are circumferentially spaced appropriately along the volute main body 111 and a mounting plate portion 1141 connected between one ends of the two connecting rib plate portions 1142. A mounting hole 1143 is formed in the mounting plate portion 1141, so that the space between the mounting hole 1143 and the two connecting rib plate portions 1142 is communicated, such that after the elastic sleeve 8 is inserted into the mounting hole 1143, it will not interfere with the volute main body 111 and the connecting rib plate portions 1142, and the structural strength and stiffness at the connection between the mounting boss portion 114 and the volute main body 111 can be ensured.

[0078] This embodiment provides a gas hot water device, including the above-mentioned blower. The gas hot water device provided in this embodiment can improve the use safety and reliability of the gas hot water device and extend the service life of the gas hot water device by adopting the above-mentioned blower. The gas hot water device can be a gas water heater or a gas wall-mounted boiler.

[0079] In the specific content of the above specific embodiment, each technical feature can be combined arbitrarily without contradiction. For the sake of concise description, not all possible combinations of the above technical features are described. However, as long as the combination of these technical features does not exist in contradiction, it should be considered as the scope described in this specification.

[0080] The specific content of the above specific embodiment only expresses several embodiments of the present invention, and its description is relatively specific and detailed, but it cannot be understood as a limitation to the scope of the patent of the present invention. It should be noted that for those of ordinary skill in the art, without departing from the concept of the present invention, several deformations and improvements can still be made, and these all belong to the protection scope of the present invention. Therefore, the protection scope of the patent of the present invention should be subject to the appended claims.

Claims

1. A fan, characterized in that, Comprising: A base assembly (1), including a stator assembly (12) and a base (11) integrally injection-molded with the stator assembly (12). An air inlet, an air cavity (1112), and an air outlet (1113) that communicate with each other are provided on the base (11). The base (11) is provided with a central through-hole (1121) that penetrates through both ends. The stator assembly (12) is disposed around the central through-hole (1121), and the base (11) at least wraps the axial two ends of the stator assembly (12). The air cavity (1112) is disposed around the stator assembly (12). An air wheel rotor assembly (2), including a substrate (22), a magnetic rotor (24), a rotating shaft (21) disposed on the substrate (22), and an air wheel (23) integrally injection-molded with the substrate (22). The rotating shaft (21) passes through the central through-hole (1121) and is rotatably mounted on the base (11). The magnetic rotor (24) is embedded in the inner circumference of the air wheel (23) and is disposed around the outside of the stator assembly (12). The air wheel (23) is placed in the air cavity (1112).

2. The fan according to claim 1, characterized in that, The base (11) has two mounting grooves (1122) disposed around the central through-hole (1121). The two mounting grooves (1122) are respectively located on the axially opposite sides of the stator assembly (12) and have opposite notch settings. Two bearing units (3) are sleeved on the rotating shaft (21), and the two bearing units (3) are respectively limit-mounted in the two mounting grooves (1122).

3. The fan according to claim 2, characterized in that, An axially limiting member (9) is detachably connected to one end of the rotating shaft (21) away from the air inlet. One end face of the bearing unit (3) away from the air inlet abuts against the axially limiting member (9), and an elastic washer (4) is pressed between the other end face and the bottom of the corresponding mounting groove (1122).

4. The fan according to claim 1, characterized in that, The base (11) is provided with an electric control mounting cavity (1123). The electric control mounting cavity (1123) is spaced around the outside of the central through-hole (1121) and is located on the side of the stator assembly (12) away from the air inlet. A circuit board (5) is installed in the electric control mounting cavity (1123). The circuit board (5) is electrically connected to the stator assembly (12) through a conductive structure (123), and at least part of the conductive structure (123) is injection-molded and wrapped in the base (11).

5. The fan according to claim 4, characterized in that, The conductive structure (123) includes a pin (1231) and a conductive wire (1232). The first end of the pin (1231) is injection-molded and wrapped in the base (11). The second end of the pin (1231) is electrically connected to the circuit board (5). One end of the conductive wire (1232) is connected to the coil (122) of the stator assembly (12), and the second end of the conductive wire (1232) is wound around the pin (1231).

6. The fan according to claim 4, characterized in that, The blower further includes a protective cover (7). The protective cover (7) is detachably connected to the base (11) and seals the opening of the electric control mounting cavity (1123).

7. The fan according to claim 1, characterized in that, The outer side of the base (11) is provided with a mounting boss portion (114), and the mounting boss portion (114) is provided with a mounting hole (1143). The fan further comprises an elastic sleeve (8), and the elastic sleeve (8) is provided with a fixing through hole (82) axially extending therethrough. The elastic sleeve (8) is inserted into the mounting hole (1143) and has two ends extending out of the mounting hole (1143).

8. The fan according to any one of claims 1-7, characterized in that, A ventilation hole (1111) is provided on a side of the base (11) facing away from the air inlet, the ventilation hole (1111) is communicated with the air cavity (1112), a plurality of ventilation holes (1111) are arranged at intervals around the axial direction of the rotating shaft (21), and on a projection plane perpendicular to the rotating shaft (21), an orthographic projection of the ventilation hole (1111) on the projection plane is located outside the range of an orthographic projection of the stator assembly (12) on the projection plane; And / or, the base (11) comprises an integrally injection-molded volute body (111) and a mounting seat (112), the volute body (111) having the air inlet and the air outlet (1113), the mounting seat (112) being protrudingly arranged inside the volute body (111) and facing the air inlet, the mounting seat (112) being integrally injection-molded with the stator assembly (12), and the mounting seat (112) having the central through hole (1121).

9. The blower according to any one of claims 1-7, characterized in that, The rotating shaft (21) and the base plate (22) are integrally injection-molded, and the wind wheel (23) and the magnetic rotor (24) are integrally injection-molded; And / or, the base plate (22) has a positioning step surface vertically connected to the inner wall of the wind wheel (23), one end of the magnetic rotor (24) abuts against the positioning step surface, and the outer side surface of the magnetic rotor (24) fits against the inner wall of the wind wheel (23).

10. A gas water heating device, characterized in that, Comprising a fan as described in any one of claims 1-9.

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