Fan and gas water heater

Abstract

The utility model belongs to the technical field of heat supply, and particularly discloses a fan and a gas water heater, which comprise a volute, an impeller, a stator assembly and a rotor assembly. The impeller can rotate relative to the volute, the stator assembly comprises a plastic base and a stator embedded in the plastic base, the plastic base is connected to the volute, the stator and the volute are spaced, the rotor assembly comprises a plastic fan, a rotor embedded in a first plastic body and a rotating shaft, and the plastic fan comprises the first plastic body and plastic fan blades. The plastic fan blades are connected to the periphery of the first plastic body, the rotor is arranged on the periphery of the stator in a sleeving mode at intervals, one end of the rotating shaft is rotationally installed on the plastic base, the other end of the rotating shaft is fixedly connected to the impeller, and the rotor, the rotating shaft, the impeller and the first opening are coaxial. The accumulated tolerance of the fan is reduced, and the problem that parts are difficult to match is solved.

Description

Technical Field

[0001] This utility model relates to the field of heating technology, and in particular to a fan and a gas water heater. Background Technology

[0002] To prevent incomplete combustion of gas in gas water heaters, which can produce harmful carbon monoxide, a fan is usually installed inside the water heater casing. This fan continuously exhausts the high-temperature flue gas from inside the casing and supplies air from outside the casing to the inside, ensuring good air circulation and providing sufficient oxygen inside the casing.

[0003] However, wind turbines in related technologies often consist of a large number of parts, making the assembly process cumbersome and causing difficulties in matching parts during installation due to accumulated tolerances. Utility Model Content

[0004] One of the technical problems solved by this utility model is to provide a fan that can effectively solve the problems of the large number of parts and the difficulty in matching parts during installation of existing fans, so as to simplify the assembly process of the fan and reduce the cumulative tolerance of the fan.

[0005] The second technical problem solved by this utility model is to provide a gas water heater that can effectively solve the problems of complicated assembly process, high production cost and large overall cumulative tolerance caused by the large number of fan parts in gas water heaters.

[0006] The first technical problem mentioned above is solved by the following technical solution:

[0007] A fan includes a volute and an impeller rotatably disposed within a receiving cavity of the volute. The volute has a first opening and a through hole at two opposite ends, and a second opening on its side wall. The fan further comprises:

[0008] A stator assembly, comprising a plastic base and a stator integrally injection molded with the plastic base, wherein the plastic base is connected to one end of the volute housing having the through hole, and an accommodating space is formed between the plastic base and the volute housing, the outer periphery of which is connected to the external space.

[0009] The rotor assembly includes a plastic fan, a rotor integrally molded with the plastic fan, and a shaft. The plastic fan is disposed within the accommodating space. The rotor is spaced around the outer periphery of the stator. One end of the shaft is rotatably mounted on the plastic base, and the other end of the shaft passes through the through hole and is fixedly connected to the impeller.

[0010] The fan described in this utility model has the following advantages compared with the prior art:

[0011] By injection molding the plastic base and stator into a single structure, and by injection molding the rotor, shaft, and plastic fan into a single structure, the number of components that need to be assembled in the fan can be effectively reduced. This simplifies the fan assembly process, reduces the cumulative tolerance of the fan, improves the dimensional accuracy of the fan, and effectively alleviates the problem of difficult component matching during installation.

[0012] In addition, by placing the plastic base and plastic fan on the outside of the volute, when the fan is used to extract high-temperature flue gas from inside the gas water heater, direct contact between the plastic base and the plastic fan and the high-temperature flue gas inside the volute can be avoided. This prevents the plastic base and plastic fan from deforming in the high-temperature working environment, which could affect the function of the fan or even cause it to fail.

[0013] Furthermore, when the rotor rotates relative to the stator, it can drive the plastic fan and impeller to rotate synchronously, so that the plastic fan can blow air into the external space through the housing space, thereby forming an airflow from the plastic fan to the outer periphery, which can block the hot air at the volute to a certain extent, so as to prevent the heat at the volute from being conducted to the side where the stator assembly is located, thereby reducing the possibility of deformation of the plastic base and plastic fan due to excessively high ambient temperature during operation.

[0014] In one embodiment, one end of the volute has an end face, the through hole is provided on the end face, and the plastic base is connected to the volute by a spacer structure so that the plastic base is spaced apart from the end face.

[0015] In one embodiment, the spacer structure includes a nut, which is partially embedded in the plastic base and protrudes from the plastic base toward the volute. The nut is locked to the volute by a threaded connection.

[0016] In one embodiment, the plastic base has a protruding structure (140) that surrounds the nut.

[0017] In one embodiment, the spacer structure includes a boss, which is provided on the end face of the volute.

[0018] In one embodiment, the distance h between the plastic base and the end face satisfies: 0mm < h ≤ 6mm.

[0019] In one embodiment, the plastic fan includes a first plastic body and plastic fan blades, the plastic fan blades being connected to the outer periphery of the first plastic body, the rotor being at least partially embedded in the inner side of the plastic fan, and the shaft being partially embedded in the first plastic body.

[0020] In one embodiment, the plastic base includes a second plastic body and a plurality of plastic support feet, the stator is embedded in the second plastic body, the plurality of plastic support feet are arranged at intervals around the second plastic body, and the plastic support feet are connected to the volute.

[0021] In one embodiment, the stator assembly further includes a pin, the fan further includes a circuit board, the pin is connected to the stator, the plastic base has a receiving groove on the side opposite to the volute, one end of the pin is embedded in the plastic base, the other end of the pin extends into the receiving groove, the circuit board is disposed in the receiving groove, the pin is inserted into and soldered to the circuit board, and the pin is electrically connected to the circuit board.

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

[0023] A gas water heater, a water heater housing, and a fan as described above, the fan being at least partially disposed within the interior space of the water heater housing.

[0024] The gas water heater described in this utility model has the following advantages compared with the prior art:

[0025] By using a fan that includes fewer components as described above, the overall assembly process of the gas water heater can be simplified, the overall cumulative tolerance of the gas water heater can be reduced, thereby effectively reducing the production cost of the gas water heater and improving the dimensional accuracy of the gas water heater. Attached Figure Description

[0026] Figure 1 This is a three-dimensional structural diagram of a fan at an angle provided in an embodiment of the present invention;

[0027] Figure 2 A three-dimensional structural diagram of the fan (without protective cover) provided in an embodiment of this utility model from another angle;

[0028] Figure 3 This is a structural cross-sectional view of the fan provided in an embodiment of the present utility model;

[0029] Figure 4 This is a schematic cross-sectional view of the stator assembly provided in an embodiment of the present utility model;

[0030] Figure 5This is a schematic cross-sectional view of the rotor assembly provided in an embodiment of the present utility model;

[0031] Label Explanation:

[0032] 1. Fan; 10. Volute; 100. Receiving cavity; 101. First opening; 102. Through hole; 103. Second opening; 104. End face; 11. Impeller; 12. Stator assembly; 120. Plastic base; 1201. Second plastic body; 1202. Plastic support foot; 120a. Receiving groove; 121. Stator; 122. Accommodating space; 123. Pin; 13. Rotor assembly; 130. Plastic fan; 1301. First plastic body; 1302. Plastic fan blade; 131. Rotor; 132. Shaft; 14. Spacing structure; 140. Protruding structure; 15. Circuit board; 16. Protective cover. Detailed Implementation

[0033] The technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, and not all embodiments. Based on the embodiments of this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application.

[0034] In the description of this application, it should be understood that the terms "center", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this application.

[0035] The terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Therefore, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this application, unless otherwise stated, "a plurality of" means two or more.

[0036] In the description of this application, it should be noted that, unless otherwise expressly specified and limited, the terms "installation," "connection," and "linking" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection between two components. Those skilled in the art can understand the specific meaning of the above terms in this application based on the specific circumstances.

[0037] like Figures 1 to 3 As shown, this embodiment provides a fan 1, including a volute 10, an impeller 11, a stator assembly 12, and a rotor assembly 13. The volute 10 has a receiving cavity 100. A first opening 101 and a through hole 102 are respectively provided at two opposite ends of the volute 10. A second opening 103 is provided on the side wall of the volute 10. The first opening 101, the second opening 103, and the through hole 102 all communicate with the receiving cavity 100. The impeller 11 is at least partially disposed within the receiving cavity 100, and the impeller 11 is rotatable relative to the volute 10. The stator assembly 12 includes a plastic base 120 and a stator 121 integrally injection-molded with the plastic base 120. The plastic base 120 is connected to the volute 10. The stator 121 has a through hole 102 at one end, and the plastic base 120 and the volute 10 form an accommodating space 122 that is connected to the external space on the outer periphery. The rotor assembly 13 includes a plastic fan 130, a rotor 131 that is injection molded into the plastic fan 130, and a rotating shaft 132. The plastic fan 130 is disposed in the accommodating space 122, the rotor 131 is spaced and sleeved on the outer periphery of the stator 121, one end of the rotating shaft 132 is rotatably mounted on the plastic base 120, and the other end of the rotating shaft 132 passes through the through hole 102 and is fixedly connected to the impeller 11.

[0038] By forming an integral structure of the plastic base 120 and stator 12 through injection molding, and by forming an integral structure of the rotor 131, shaft 132 and plastic fan 130 through injection molding, the number of parts that need to be assembled in the fan 1 can be effectively reduced, thereby simplifying the assembly process of the fan 1, reducing the cumulative tolerance of the fan 1, improving the dimensional accuracy of the fan 1, and effectively alleviating the problem of difficult matching of parts during installation.

[0039] Specifically, the stator 121 can be at least partially embedded in the plastic base 120 by injection molding the plastic base 120 onto the outside of the stator 121, and the rotor 131 and the shaft 132 can be at least partially embedded in the plastic fan 130 by injection molding the plastic fan 130 onto the outside of the rotor 131 and the shaft 132.

[0040] Furthermore, by placing the plastic base 120 and the plastic fan 130 outside the volute 10, when the fan 1 is used to extract high-temperature flue gas from inside the gas water heater, direct contact between the plastic base 120 and the plastic fan 130 and the high-temperature flue gas inside the volute 10 can be avoided. This prevents the plastic base 120 and the plastic fan 130 from deforming in the high-temperature working environment, which could affect the function of the fan 1 or even cause it to fail.

[0041] Furthermore, by rotating the rotor 131 relative to the stator 121, the plastic fan 130 and the impeller 11 rotate synchronously, so that the plastic fan 130 can fan the air to the outside space through the accommodating space 122, thereby forming an airflow from the plastic fan 130 to the outer periphery, so as to block the hot air at the volute 10 to prevent the heat at the volute 10 from being conducted to the side where the stator assembly 12 is located, thereby reducing the possibility that the plastic base 120 and the plastic fan 130 will deform due to the high ambient temperature during operation.

[0042] Understandably, when the rotor assembly 13 drives the impeller 11 to rotate in different directions, the first opening 101 can be formed as an air inlet and the second opening 103 can be formed as an air outlet, or the first opening 101 can be formed as an air outlet and the second opening 103 can be formed as an air inlet.

[0043] In one embodiment, one end of the rotating shaft 132 can be rotatably connected to the plastic base 120 via a bearing, or one end of the rotating shaft 132 can be rotatably inserted into the plastic base 120, and one end of the rotating shaft 132 is limited and connected to the plastic base 120 via a limiting sleeve, so as to prevent the rotating shaft 132 from detaching from the plastic base 120 during the use of the fan 1.

[0044] Please combine Figure 4 As shown, in one embodiment, one end of the volute 10 has an end face 104, and a through hole 102 is provided on the end face 104. The plastic base 120 is connected to the volute 10 through a spacer structure 14, so that the plastic base 120 is spaced apart from the end face 104, thereby extending the heat conduction path from the end face 104 of the volute 10 to the plastic base 120, so as to further reduce the possibility that at least part of the plastic base 120 will deform under the action of high temperature.

[0045] The partition structure 14 can be designed into various different structures according to actual use and design requirements. The following are some examples of the specific structures of the partition structure 14.

[0046] In one optional embodiment, the spacer structure 14 includes a nut, which is partially embedded in the plastic base 120 and protrudes from the plastic base 120 toward the volute 10. The nut is locked to the volute 10 by a threaded component. Thus, on the one hand, the portion of the nut protruding from the plastic base 120 can form a space between the plastic base 120 and the end face 104 of the volute 10. On the other hand, the nut can provide a position for the threaded component to be threaded, so as to lock the plastic base 120 to the volute 10. The threaded component may include, but is not limited to, bolts and screws.

[0047] In one embodiment, the nut can be made of metal, which gives it good structural stability in high-temperature environments and high structural strength, which is beneficial for ensuring good connection stability between the nut and the volute 10 through the threaded parts.

[0048] In one embodiment, the plastic base 120 is provided with a protruding structure 140, which is arranged around the nut. The protruding structure 140 improves the connection stability between the nut and the plastic base 120 in the relative direction between the plastic base 120 and the volute 10, thereby improving the overall structural stability of the fan 1.

[0049] In another alternative embodiment, the spacer structure 14 includes a boss, and the end face 104 of the volute 10 is provided with a boss to extend the heat conduction path from the end face 104 of the volute 10 to the plastic base 120.

[0050] In other embodiments, the spacer structure 14 may include a boss and a nut, with the nut being threaded onto the boss to connect the plastic base 120 to the volute 10.

[0051] The plastic base 120 and the end face 104 are spaced apart by a distance h. The larger the distance h, the longer the heat conduction path from the end face 104 of the volute 10 to the plastic base 120. However, the larger the volume occupied by the spacer structure 14, the more difficult it is to stably fix the plastic base 120, the spacer structure 14 and the volute 10 together. Therefore, the distance h cannot be too large. Based on this, in one embodiment, the distance h between the plastic base 120 and the end face 104 satisfies: 0 mm < h ≤ 6 mm. For example, the distance h can be 0.01 mm, 0.02 mm, 0.05 mm, 0.1 mm, 0.123 mm, 0.2 mm, 0.25 mm, 0.3 mm, 0.35 mm, 0.4 mm, 0.45 mm, 0.5 mm, 0.55 mm or 0.6 mm, etc.

[0052] Please combine Figure 5As shown, in one embodiment, the plastic fan 130 includes a first plastic body 1301 and plastic fan blades 1302. The plastic fan blades 1302 are connected to the outer periphery of the first plastic body 1301. The rotor 131 is at least partially embedded in the first plastic body 1301, and the rotating shaft 132 is partially embedded in the first plastic body 1301. Thus, when the rotor 131 rotates relative to the stator 121, it can drive the plastic fan blades 1302 to rotate synchronously with the impeller 11, so that the plastic fan blades 1302 can fan the air to the external space through the accommodating space 122, thereby forming an airflow from the first plastic body 1301 to the outer periphery, so as to achieve a certain blocking effect on the hot air at the volute 10.

[0053] In one embodiment, the plastic fan blades 1302 are located between the two ends of the rotor 131 along the axial direction of the shaft 132, so that the overall structure of the rotor assembly 13 along the axial direction of the shaft 132 is more compact, so that the size of the accommodating space 122 along the axial direction of the shaft 132 can be smaller, which is conducive to the miniaturization of the fan 1.

[0054] In one embodiment, the plastic base 120 includes a second plastic body 1201 and a plurality of plastic support feet 1202. The stator 121 is embedded in the second plastic body 1201, and the plurality of plastic support feet 1202 are arranged around the second plastic body 1201 at intervals. The plastic support feet 1202 are connected to the volute 10, so that the accommodating space 122 can be connected to the external space through the gap between two adjacent plastic support feet 1202, and the plurality of plastic support feet 1202 can provide a more balanced and stable support for the second plastic body 1201.

[0055] In one embodiment, the stator assembly 12 further includes a pin 123, and the fan 1 further includes a circuit board 15. The pin 123 is connected to the stator 121. The plastic base 120 is provided with a receiving groove 120a on the side away from the volute 10. One end of the pin 123 is embedded in the plastic base 120, and the other end of the pin 123 extends into the receiving groove 120a. The circuit board 15 is disposed in the receiving groove 120a. The pin 123 is inserted into and soldered to the circuit board 15. The pin 123 is electrically connected to the circuit board 15. Thus, during the assembly process of the fan 1, it is only necessary to cooperate with the pin 123 fixed at a specific position on the plastic base 120 to insert and solder the circuit board 15, so that the circuit board 15 can be disposed on the plastic base 120 and electrically connected to the stator 121. The assembly operation steps are simple, and the installation position of the circuit board 15 on the plastic base 120 is fixed, which is conducive to reducing the assembly difficulty of the manual assembly line or to realizing automated assembly.

[0056] In one embodiment, the plastic base 120 is provided with a receiving groove 120a on the side away from the volute 10 (i.e., the side of the second plastic body 1201 away from the volute 10). The other end of the pin 123 extends from the bottom of the receiving groove 120a into the receiving groove 120a. The circuit board 15 is disposed in the receiving groove 120a. Thus, on the one hand, the receiving groove 120a can accommodate and protect the circuit board 15 and the pin 123. On the other hand, the receiving groove 120a can also limit the circuit board 15 to reduce the possibility of the circuit board 15 detaching from the plastic base 120 during transportation and use.

[0057] In one embodiment, the fan 1 further includes a protective cover 16, which is detachably disposed at the opening of the receiving groove 120a, so as to separate the internal space of the receiving groove 120a from the external space of the plastic base 120, thereby further protecting the circuit board 15 and the pin 123 located in the receiving groove 120a.

[0058] This embodiment also provides a gas water heater, including: a water heater casing and a fan 1 as described in the foregoing technical solution (see [link to previous document]). Figure 1 The fan 1 is at least partially located in the internal space of the water heater casing. Since the number of parts that need to be assembled is small, this arrangement simplifies the overall assembly process of the gas water heater, reduces the overall cumulative tolerance of the gas water heater, thereby effectively reducing the production cost of the gas water heater and improving the dimensional accuracy of the gas water heater.

[0059] In the specific implementation of the above embodiments, the technical features can be combined in any non-contradictory way. For the sake of brevity, not all possible combinations of the above technical features are described. However, as long as the combination of these technical features is not contradictory, it should be considered to be within the scope of this specification.

[0060] The specific embodiments described above are merely illustrative of several implementations of this utility model, and while the descriptions are detailed, they should not be construed as limiting the scope of this utility model patent. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of this utility model, and these all fall within the protection scope of this utility model. Therefore, the protection scope of this utility model patent should be determined by the appended claims.

Claims

1. A fan, comprising a volute (10) and an impeller (11) rotatably disposed within a receiving cavity (100) of the volute (10), wherein the volute (10) has a first opening (101) and a through hole (102) at two opposite ends, and a second opening (103) is provided on the side wall of the volute (10), characterized in that, The fan (1) also includes: The stator assembly (12) includes a plastic base (120) and a stator (121) integrally injection molded with the plastic base (120). The plastic base (120) is connected to one end of the volute (10) where the through hole (102) is provided, and a receiving space (122) is formed between the plastic base (120) and the volute (10) with its outer periphery connected to the external space. The rotor assembly (13) includes a plastic fan (130), a rotor (131) integrally molded with the plastic fan (130), and a shaft (132). The plastic fan (130) is disposed in the accommodating space (122). The rotor (131) is spaced and sleeved on the outer periphery of the stator (121). One end of the shaft (132) is rotatably mounted on the plastic base (120), and the other end of the shaft (132) passes through the through hole (102) and is fixedly connected to the impeller (11).

2. The fan according to claim 1, characterized in that, One end of the volute (10) has an end face (104), the through hole (102) is provided on the end face (104), and the plastic base (120) is connected to the volute (10) through a spacer structure (14) so ​​that the plastic base (120) is spaced apart from the end face (104).

3. The fan according to claim 2, characterized in that, The spacer structure (14) includes a nut, which is partially embedded in the plastic base (120) and protrudes from the plastic base (120) toward the volute (10). The nut is locked to the volute (10) by a threaded connection.

4. The fan according to claim 3, characterized in that, The plastic base (120) has a protruding structure (140) that surrounds the nut.

5. The fan according to claim 2, characterized in that, The spacer structure (14) includes a boss, which is provided on the end face (104) of the volute (10).

6. The fan according to any one of claims 2-5, characterized in that, The distance h between the plastic base (120) and the end face (104) satisfies: 0mm < h ≤ 6mm.

7. The fan according to any one of claims 1-5, characterized in that, The plastic fan (130) includes a first plastic body (1301) and plastic fan blades (1302). The plastic fan blades (1302) are connected to the outer periphery of the first plastic body (1301). The rotor (131) is at least partially embedded in the inner side of the plastic fan, and the shaft (132) is partially embedded in the first plastic body (1301).

8. The fan according to any one of claims 1-5, characterized in that, The plastic base (120) includes a second plastic body (1201) and a plurality of plastic support feet (1202). The stator (121) is embedded in the second plastic body (1201). The plurality of plastic support feet (1202) are arranged around the second plastic body (1201) at intervals. The plastic support feet (1202) are connected to the volute (10).

9. The fan according to any one of claims 1-5, characterized in that, The stator assembly (12) further includes a pin (123), and the fan (1) further includes a circuit board (15). The pin (123) is connected to the stator (121). The plastic base (120) is provided with a receiving groove (120a) on the side away from the volute (10). One end of the pin (123) is embedded in the plastic base (120), and the other end of the pin (123) extends into the receiving groove (120a). The circuit board (15) is located in the receiving groove (120a). The pin (123) is inserted into and soldered to the circuit board (15). The pin (123) is electrically connected to the circuit board (15).

10. A gas-fired water heater, characterized in that, include: The water heater housing and the fan (1) as described in any one of claims 1-9, wherein the fan (1) is at least partially disposed in the interior space of the water heater housing.

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