Air supply device and gas water heater

Abstract

The utility model discloses an air supply device and a gas water heater, the air supply device comprises a first shell and a second shell, the first shell is provided with an air inlet duct, a volute air duct communicated with the air inlet duct and an air outlet duct communicated with the volute air duct are constructed between the first shell and the second shell, and in the radial outward direction of the volute air duct, the air outlet duct inclines in the direction deviating from the air inlet duct. According to the air supply device provided by the embodiment of the utility model, the first shell and the second shell are connected to form the air supply device, so that the structure of the air supply device can be simplified, and the processing cost is reduced.

Description

Technical Field

[0001] The utility model relates to the technical field of water heaters, in particular to an air supply device and a gas water heater. Background Art

[0002] A fan is usually installed in a gas water heater. The fan is used to discharge the waste gas and waste heat generated during the use of the water heater, thereby reducing the impact of the waste gas and waste heat on the normal operation of the water heater.

[0003] In the gas water heater of the related art, air supply is achieved by adapting the shell and the fan. A large amount of waste heat will be generated during the actual operation of the water heater. In order to meet the needs of the water heater, the material of the shell is usually metal material, and its processing steps are relatively cumbersome. Utility Model Content

[0004] One purpose of the utility model is to provide an air supply device to solve one or more technical problems existing in the prior art and at least provide a beneficial choice or create conditions.

[0005] Another object of the present invention is to provide a gas water heater.

[0006] According to the air supply device of the embodiment of the utility model, the air supply device includes a first shell and a second shell, the first shell having an air inlet duct, a volute duct connected to the air inlet duct and an air outlet duct connected to the volute duct are constructed between the first shell and the second shell, and the air outlet duct is inclined in a direction away from the air inlet duct in the radial outward direction along the volute duct.

[0007] According to the air supply device of the embodiment of the utility model, the air supply device can be constructed by connecting the first shell and the second shell, which can simplify the structure of the air supply device and thus reduce the processing cost.

[0008] In addition, the air supply device according to the above embodiment of the utility model may also have the following additional technical features:

[0009] In some embodiments, the first housing is configured as an integral molding; and / or the second housing is configured as an integral molding.

[0010] In some embodiments, the first shell is cooperatively configured as a plastic shell; or, the second shell is configured as a plastic shell; or, the first shell is cooperatively configured as a BMC shell; or, the second shell is configured as a BMC shell.

[0011] In some embodiments, the first shell includes a first side panel and a first end panel connected to one side edge of the first side panel, the second shell includes a second side panel and a second end panel connected to one side edge of the second side panel, and the other side edge of the first side panel is connected to the other side edge of the second side panel to construct the volute air duct.

[0012] In some embodiments, the first end plate is provided with an air inlet, and the first shell further includes a third side plate, the air inlet duct is constructed in the third side plate, the third side plate is connected to the first end plate, and the air inlet duct is connected to the air inlet.

[0013] In some embodiments, the first shell further includes a fourth side panel, and the second shell further includes a fifth side panel, and the fourth side panel and the fifth side panel are connected and enclosed to form the air outlet duct.

[0014] In some embodiments, the first end plate is provided with an air inlet, and a flange is provided at a periphery of the air inlet, and the flange is configured to extend obliquely from the air inlet duct toward the volute duct.

[0015] In some embodiments, the first shell has a first side edge, the second shell has a second side edge, the first side edge has a first recess and a first convex portion, the first convex portion is protruding compared to the first recess, the second side edge has a second recess and a second convex portion, the second convex portion is protruding compared to the second recess, the first convex portion is arranged in the second recess, and the second convex portion is arranged in the first recess.

[0016] In some embodiments, a first dividing surface and a second dividing surface are provided between the first outer shell and the second outer shell, the first dividing surface is arranged on a plane passing through the axis of the air outlet duct; the second dividing surface is connected to the first dividing surface and is arranged on a normal plane of the axis of the volute duct.

[0017] In some embodiments, the air supply device has mutually orthogonal front-to-back directions, up-down directions, and left-to-right directions, and the axis of the volute air duct is configured to be inclined from the lower left to the upper right.

[0018] In some embodiments, the top wall of the air inlet duct is configured to extend obliquely from the lower left to the upper right to the left side wall of the volute duct.

[0019] In some embodiments, the inlet axis of the air inlet duct is parallel to the up-down direction, and the outlet axis of the air outlet duct is parallel to the up-down direction.

[0020] In some embodiments, the air outlet duct has a transition section and an air outlet section, the air outlet section is inclined in a radial direction away from the air inlet duct relative to the volute air duct, the first end of the transition section is connected to the volute air duct, and the second end is connected to the air outlet section.

[0021] The gas water heater according to the embodiment of the utility model comprises: the aforementioned air supply device; a combustion chamber, wherein the combustion chamber is connected to the air supply device and communicated with the air inlet duct.

[0022] In some embodiments, the air inlet duct is arranged above the combustion chamber. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 It is a schematic diagram of an air supply device according to an embodiment of the utility model.

[0024] Figure 2 It is a side view of an air supply device according to an embodiment of the utility model.

[0025] Figure 3 It is a cross-sectional view of an air supply device according to an embodiment of the utility model.

[0026] Figure 4 yes Figure 3 A partial enlarged schematic diagram of the area A in the middle circle.

[0027] Figure 5 It is a schematic diagram of a first shell of an air supply device according to an embodiment of the utility model.

[0028] Figure 6 yes Figure 5 A partial enlarged schematic diagram of the area in the middle circle B.

[0029] Figure 7 It is a schematic diagram of a second shell of an air supply device according to an embodiment of the utility model.

[0030] Figure 8 yes Figure 7 A partial enlarged schematic diagram of the area C in the middle circle.

[0031] Figure numerals: 10, air supply device; 101, air inlet duct; 102, volute duct; 1021, air inlet; 1022, air outlet; 103, air outlet duct; 1031, transition section; 1032, air outlet section; 1041, first dividing surface; 1042, second dividing surface; 11, first outer shell; 111, first end plate; 113, first side plate; 114, third side plate; 115, fourth side plate; 1102, flange; 1105, first side; 1106, first recess; 1107, first convex; 12, second outer shell; 122, second end plate; 123, second side plate; 124, fifth side plate; 1204, mounting seat; 1205, second side; 1206, second recess; 1207, second convex. DETAILED DESCRIPTION

[0032] The embodiments of the present invention are described in detail below, and examples of the embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are intended to be used to explain the present invention, and should not be construed as limiting the present invention.

[0033] like Figures 1 to 4 According to the air supply device 10 of the embodiment of the utility model, the air supply device 10 includes a first housing 11 and a second housing 12, the first housing 11 has an air inlet duct 101, and a volute duct 102 connected to the air inlet duct 101 is constructed between the first housing 11 and the second housing 12, and an air outlet duct 103 connected to the volute duct 102 is also constructed between the first housing 11 and the second housing 12. In the radial outward direction along the volute duct 102, the air outlet duct 103 is inclined in a direction away from the air inlet duct 101.

[0034] The airflow can be introduced into the volute duct 102 through the air inlet duct 101, and after passing through the volute duct 102, it is sent out from the air outlet duct 103. Optionally, the volute duct 102 has an air inlet 1021 on one side wall along the axial direction and an air outlet 1022 on the peripheral wall. The air inlet duct 101 is connected to the air inlet 1021, and the air outlet duct 103 is connected to the air outlet 1022. The air outlet duct 103 is inclined in a direction away from the side wall relative to the radial direction of the volute duct 102. The air supply device 10 may also include an impeller and a motor, etc. The impeller may be provided in the volute duct 102 to provide power for the airflow.

[0035] According to the air supply device 10 of the embodiment of the utility model, the air supply device 10 can be constructed by connecting the first shell 11 and the second shell 12, which can simplify the structure of the air supply device 10, thereby reducing the processing cost. In addition, when the airflow passes through the air inlet duct 101 and enters the volute duct 102, it will have a speed along the axial direction of the volute duct 102. After being driven by the impeller in the volute duct 102, it will be sent out from the air outlet 1022 along the radial direction of the volute duct 102. The airflow may have a certain axial component velocity. By tilting the air outlet duct 103, the circulation of the airflow can be facilitated and the flow resistance during the circulation of the airflow can be reduced.

[0036] The air supply device 10 has mutually orthogonal front-to-back direction, left-to-right direction and up-to-down direction. Of course, the utility model mainly describes the orientation according to the drawings, which is not a limitation on the protection scope of the utility model. The technical solution obtained after adjusting the direction according to the solution of the utility model is still within the protection scope of the utility model, such as swapping the left-to-right direction in the drawings.

[0037] In addition, through this arrangement, air intake and outlet can be achieved in the up and down directions, and since the axis of the volute air duct 102 is inclined, the volume of the air supply device 10 can be reduced. Some embodiments of the utility model are described in detail below with reference to the accompanying drawings.

[0038] like Figure 2 and Figure 3 The axis of the volute air duct 102 is configured to be inclined from the lower left to the upper right. Since the volute air duct 102 is inclined, after the airflow enters the air supply device 10 from the bottom to the top, it will enter the volute air duct 102 along the air inlet duct 101. Compared with the volute whose axis extends in the left-right direction, the axis of the volute air duct 102 is inclined, which can reduce the wind resistance during the air flow process and effectively improve the energy efficiency of the air supply device 10.

[0039] Among them, the top wall of the air inlet duct 101 is configured to extend obliquely from the lower left to the upper right direction to the volute duct 102. For example, the air inlet 1021 is provided on the left side wall of the volute duct 102, and the top wall of the air inlet duct 101 is configured to extend obliquely from the lower left to the upper right direction to the left side wall of the volute duct 102. Thus, it is convenient to guide the airflow into the volute duct 102. Specifically, after the airflow enters the air inlet duct 101, it will gradually change from the flow direction from bottom to top to the direction from bottom to top right under the guidance of the top wall of the air inlet duct 101, so as to facilitate the airflow to stably enter the volute duct 102, thereby effectively improving the performance of the air supply device 10.

[0040] In addition, in some specific examples of the present invention, the axis of the volute air duct 102 is configured to be inclined from the lower left to the upper right, the inlet axis of the air inlet air duct 101 is parallel to the up-down direction, and the outlet axis of the air outlet air duct 103 is parallel to the up-down direction. Among them, the airflow can be introduced into the air inlet air duct 101 through the inlet of the air supply air duct from the bottom to the top; under the guidance or flow collection effect of the air inlet air duct 101, it is introduced into the volute air duct 102 through the air inlet 1021; then it is introduced into the air outlet air duct 103 through the air outlet 1022 of the volute air duct 102, and finally sent out from the outlet of the air outlet air duct 103. The whole process is smooth, the wind resistance is small, and the energy efficiency of the air supply device 10 can be effectively improved.

[0041] In some embodiments of the present invention, Figure 3 The outlet duct 103 has a transition section 1031 and an outlet section 1032. The outlet section 1032 is inclined in a direction away from the side wall relative to the radial direction of the volute duct 102. The first end of the transition section 1031 is connected to the volute duct 102 and connected to the air outlet 1022, and the second end is connected to the outlet section 1032. The transition section 1031 can be used to guide the airflow, further reduce the flow resistance, and improve energy efficiency. Among them, the transition section 1031 can be set as an arc duct, or as a straight duct, etc. And the first end axis of the transition section 1031 can be set to be parallel to or coincide with the axis of the air outlet 1022, and the second end axis of the transition section 1031 can be set to be parallel to or coincide with the inlet axis of the air outlet section 1032.

[0042] For example, Figure 3 The air outlet duct 103 has a transition section 1031 and an air outlet section 1032, the air outlet section 1032 extends in the up-down direction, the first end of the transition section 1031 is connected to the volute duct 102 and connected to the air outlet 1022, and the second end is connected to the air outlet section 1032, the axis of the first end is substantially parallel to the axis of the air outlet 1022, and the axis of the second end is substantially parallel to the up-down direction. By setting the transition section 1031, the radial air outlet of the volute duct 102 can be stably guided to a direction inclined to the radial direction of the volute duct 102, so that the airflow can smoothly pass from the volute duct 102 to the air outlet channel, reduce the wind resistance during the airflow circulation process, and optimize the performance of the air supply device 10.

[0043] In combination with the above, the air inlet duct 101 and the volute duct 102 are formed by connecting the first shell 11 and the second shell 12, which can facilitate the molding of the first shell 11 and the second shell 12. Optionally, the first shell 11 may include a first duct shell and a second duct shell, and the second shell 12 may include a third duct shell, wherein the first duct shell and the second duct shell are connected. The first duct shell is configured as a first duct body, and the air inlet duct 101 is configured in the first duct body; the second duct shell and the third duct shell are connected, and the second duct shell and the third duct shell are configured as a second duct body, and the volute duct 102 is configured in the second duct body, and the second duct shell and the second duct shell are respectively half of the second duct body.

[0044] In some embodiments of the utility model, the first housing 11 is configured as an integral molding. Through integral molding, the processing efficiency of the first housing 11 can be improved, the processing cost of the first housing 11 can be reduced, and the first housing 11 can be ensured to have a higher structural strength and sealing effect, thereby improving the service life and energy efficiency of the air supply device 10. In addition, the second housing 12 can also be configured as an integral molding. When the first housing 11 and the second housing 12 are both configured as an integral molding structure, the service life and energy efficiency of the air supply device 10 can be further improved, and the problem of stress concentration at the connection between the first housing 11 and the second housing 12 due to thermal expansion and contraction of the first housing 11 and the second housing 12 can be avoided.

[0045] At least one of the first shell 11 and the second shell 12 in the present invention can be set as a plastic shell, which can further improve the processing efficiency of the air supply device 10 and reduce the cost of the air supply device 10. In addition, in combination with the above, the air duct structure is constructed by connecting the first shell 11 and the second shell 12 in the front-to-back direction in the present invention, which can simplify the structure of the first shell 11 and the second shell 12, so that the first shell 11 and the second shell 12 are convenient for plastic molding, thereby effectively reducing the cost of the air supply device 10 and improving the molding efficiency of the air supply device 10.

[0046] The first shell and the second shell in the utility model can be made of high temperature resistant materials and can be installed in the special environment of the water heater. For example, the first shell 11 and the second shell 12 can be respectively formed by injection molding and die casting, and the first shell 11 and the second shell 12 after molding are connected together, that is, the original multiple sheet metals are simplified into two parts to form a shell, which simplifies the process and reduces the processing cost.

[0047] In addition, at least one of the first shell 11 and the second shell 12 in the present invention can be configured as a BMC shell. BMC is essentially a molding intermediate material for manufacturing glass fiber reinforced thermosetting products by a semi-dry method. It can be molded and injection molded, and its heat resistance is better than that of general engineering plastics. Its heat deformation temperature HDT is to degrees Celsius. Therefore, when the shell made of BMC material is installed in the water heater, it will not be overheated and melted.

[0048] In addition, at least one of the first housing 11 and the second housing 12 may be made of a metal material.

[0049] In the present invention, the first shell 11 and the second shell 12 are configured as the volute air duct 102, which may include but is not limited to the following implementation forms.

[0050] In some embodiments, such as Figure 5 and Figure 7 The first housing 11 includes a first side plate 113 and a first end plate 111. The first side plate 113 can be configured as a cylinder, and the first end plate 111 is connected to one side edge of the first side plate 113. The second housing 12 can include a second side plate 123 and a second end plate 122. The second side plate 123 can be configured as a cylinder, and the second end plate 122 is connected to one side edge of the second side plate 123. The other side edge of the first side plate 113 is connected to the other side edge of the second side plate 123 to construct the volute air duct 102.

[0051] The present invention is mainly described by taking the first housing 11 including the first side plate 113 and the first end plate 111, and the second housing 12 including the second side plate 123 and the second end plate 122 as an example, but this is not a limitation on the protection scope of the present invention, and the present invention can also be set in other forms, such as not setting the first side plate 113; or not setting the second side plate 123, etc. Of course, the above-mentioned way of constructing the volute air duct 102 is only some implementation methods of the present invention, and is not a limitation on the protection scope of the present invention.

[0052] In addition, the first end plate 111 may be provided with an air inlet 1021, and the first housing 11 further includes a third side plate 114, an air inlet duct 101 is constructed inside the third side plate 114, and the third side plate 114 may be connected to the first end plate 111, and the air inlet duct 101 is connected to the air inlet 1021. The third side plate 114 may be set to a cylindrical shape, a square cylindrical shape, a triangular cylindrical shape, or other forms of cylindrical shapes.

[0053] For example, the third side plate 114 may include a first plate portion, a second plate portion, a third plate portion and a fourth main portion, and the first plate portion, the second plate portion, the third plate portion and the fourth main portion are sequentially connected to form a square frame shape. The first plate portion may extend in the up-down direction; the second plate portion may extend in the front-back direction; the third plate portion may extend in the up-down direction; and the fourth plate portion may extend in the front-back direction. Of course, the above description is only some embodiments of the present invention, and is not intended to limit the scope of protection of the present invention. The air inlet duct 101 in the present invention may also be set as a circular frame, a conical frame or other shapes.

[0054] During the assembly process of the air supply device 10, the impeller can be installed in the volute air duct 102. The volute air duct 102 is formed by splicing the first outer shell 11 and the second outer shell 12, so that the impeller can be installed. The first end plate 111 and the second end plate 122 can cooperate to support the impeller. Through this arrangement, the installation efficiency of the impeller can be improved.

[0055] In addition, if Figure 5 and Figure 7 The first housing 11 further includes a fourth side plate 115, and the second housing 12 further includes a fifth side plate 124. The fourth side plate 115 and the fifth side plate 124 are connected and enclosed to form the air outlet duct 103. Thus, the structure of the first housing 11 and the second housing 12 can be simplified. When the first housing 11 and the second housing 12 are injection molded, the air outlet duct 103 is split into the fourth side plate 115 and the fifth side plate 124, which can facilitate the molding of the first housing 11 and the second housing 12, reduce the manufacturing cost, and improve the production efficiency.

[0056] In addition, the second end plate 122 can be provided with an axial hole to facilitate the installation of the impeller's shaft and the connection to the motor outside the volute air duct 102 to facilitate driving the airflow. In addition, the outer side of the second end plate 122 can be provided with a mounting seat 1204 to facilitate the installation of the motor.

[0057] The first end plate 111 is provided with an air inlet 1021, and a flange 1102 is provided around the air inlet 1021. The flange 1102 is configured to extend obliquely from the air inlet duct 101 toward the volute duct 102, which can facilitate the connection between the air inlet duct 101 and the volute duct 102, and connect the volute duct 102 with the air inlet duct 101 through the inlet, so as to facilitate smoke exhaust. In addition, the flange 1102 can form a guide structure to guide the smoke, further reduce the wind resistance at the air inlet 1021, and further gather the smoke to facilitate smoke exhaust. The flange 1102 cooperates to form a ring extending along the periphery of the air inlet 1021.

[0058] In some embodiments of the utility model, the inlet of the air inlet duct 101 extends in the up-down direction, and the outlet of the volute duct 102 extends in the up-down direction. Under the driving action of the impeller in the volute, negative pressure will be generated in the volute duct 102, and the smoke will pass through the air inlet duct 101 in the up-down direction, and then pass through the air inlet 1021 between the air inlet duct 101 and the volute duct 102, and enter the volute duct 102 in the left-right direction, and under the driving action of the impeller in the volute duct 102, the smoke is sent out in the up-down direction. Therefore, by setting the direction of the inlet and outlet, it is possible to facilitate the flow of smoke, reduce the flow resistance during the smoke flow process, and optimize the performance of the air supply device 10.

[0059] Among them, combined Figures 5 to 8 , the first housing 11 has a first side 1105, the second housing 12 has a second side 1205, the first side 1105 and the second side 1205 are connected, wherein the first side 1103 may include a first front side and a first rear side, and the second side may include a second front side and a second rear side. Specifically, the first housing 11 and the second housing 12 are butted together in the left-right direction, the first housing 11 has a first front side and a first rear side, the second housing 12 has a second front side and a second rear side, one end of the first front side and one end of the first rear side are separated at the outlet of the air outlet duct, and the other end of the first front side is connected to the other end of the first rear side. One end of the second front side and one end of the second rear side are separated at the outlet of the air outlet duct, and the other end of the second front side is connected to the other end of the second front side. Among them, the first front side and the second front side are butted together, and the first rear side and the second rear side are connected, so as to construct an airflow channel between the first housing 11 and the second housing 12.

[0060] Among them, the first side 1105 has a first concave portion 1106 and a first convex portion 1107, the first convex portion 1107 is protruding compared to the first concave portion 1106, the second side 1205 has a second concave portion 1206 and a second convex portion 1207, the second convex portion 1207 is protruding compared to the second concave portion 1206, the first convex portion 1107 is arranged on the second concave portion 1206, and the second convex portion 1207 is arranged on the first concave portion 1106. The air supply device 10 itself has the effect of guiding wind, so it has certain requirements for sealing. The cooperation of the first convex portion 1107 and the second concave portion 1206, and the cooperation of the second convex portion 1207 and the first concave portion 1106 can improve the sealing performance of the connection structure between the first shell 11 and the second shell 12, and make the connection structure between the first shell 11 and the second shell 12 more stable and have greater connection structure strength. In addition, the cooperation of the concave and convex structure can play a certain guiding effect, so as to facilitate the connection of the first shell 11 and the second shell 12.

[0061] In some embodiments, a first dividing surface 1041 and a second dividing surface 1042 are provided between the first housing 11 and the second housing 12, wherein the first dividing surface 1041 is provided on a plane passing through the axis of the air outlet duct 103; the second dividing surface 1042 is connected to the first dividing surface 1041 and provided on a normal plane to the axis of the volute duct 102. This can simplify the structures of the first housing 11 and the second housing 12, reduce the mold cost for manufacturing the first housing 11 and the second housing 12, facilitate demoulding, facilitate molding of the first housing 11 and the second housing 12, and improve the molding efficiency of the first housing 11 and the second housing 12.

[0062] In addition, a connector is connected between the first housing 11 and the second housing 12. Specifically, the connector may be a bolt. In other embodiments, the connector may be a wire for connection. Adding a connector to the first housing 11 and the second housing 12 makes the connection between the first housing 11 and the second housing 12 more stable, strengthens the connection stability between the first housing 11 and the second housing 12, and improves the sealing effect of the connection between the first housing 11 and the second housing 12.

[0063] Further, the first housing 11 is connected to a first extension plate, and the first extension plate is located on the outer side wall of the first housing 11. The second housing 12 is connected to a second extension plate, and the second extension plate is located on the outer side wall of the second housing 12, and the connector is connected to the first extension plate and the second extension plate. Specifically, the first extension plate and the second extension plate have the same shape and structure, and when the first housing 11 and the second housing 12 are snapped together, the first extension plate and the second extension plate are completely abutted. The first extension plate and the second extension plate provide a connection position for the connector, so that the connector is conveniently inserted into the first extension plate and the second extension plate.

[0064] In some embodiments, after the connecting member passes through the first extension plate and the second extension plate, one end of the connecting member abuts against the outer wall of the second extension plate, and the other end of the connecting member extends out of the outer wall of the first extension plate. The other end of the connecting member is connected to a locking rod through a rotating shaft, and the diameter of the locking rod is smaller than the diameter of the connecting member.

[0065] A torsion spring is also provided, which is sleeved on the rotating shaft. The two ends of the torsion spring are respectively connected to the locking rod and the connecting piece. Under the action of the torsion spring, the angle formed between the screw rod and the locking rod can be limited, so that the locking rod has a tendency to move in a direction close to the first extension plate, so that the end of the locking rod away from the rotating shaft is against the outer wall of the first extension plate.

[0066] Before the connecting piece passes through the first extension plate and the second extension plate, first rotate the locking rod to overcome the elastic force of the torsion spring so that the locking rod and the connecting piece are coaxially arranged, then synchronously pass the locking rod and the connecting piece through the first extension plate and the second extension plate, and then release the locking rod. Under the action of the torsion spring, the locking rod will form a certain angle with the connecting piece, reducing the situation where the connecting piece accidentally falls off the first extension plate and the second extension plate, thereby improving the connection stability between the first shell 11 and the second shell 12.

[0067] In some embodiments, the first housing 11 and the second housing 12 are connected by gluing. The first housing 11 and the second housing 12 can be connected by gluing, which is relatively simple and easy to operate.

[0068] The gas water heater according to the embodiment of the utility model comprises: the aforementioned air supply device 10 and a combustion chamber, wherein the combustion chamber is connected to the air supply device 10 and communicated with the air inlet duct 101. A burner may be arranged in the combustion chamber, and the burner may extend during combustion. Under the suction effect of the air supply device 10, the smoke can be collected through the air inlet duct 101 and sent out from the outlet of the air supply device 10. The air supply device 10 in the utility model has a small wind resistance and is easy to form, and can improve the production efficiency of the air supply device 10 while ensuring the circulation of smoke.

[0069] In some embodiments, the combustion chamber and the air supply device 10 are distributed along the left-right direction, which is parallel to the axis of the volute air duct 102. The smoke wind resistance can be reduced and the smoke exhaust performance can be improved, so as to provide a better combustion environment for the combustion chamber, achieve full combustion of the gas, and save energy and protect the environment. For example, the air inlet duct 101 can be arranged above the combustion chamber.

[0070] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present invention.

[0071] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include at least one of the features. In the description of the present utility model, the meaning of "plurality" is at least two, such as two, three, etc., unless otherwise clearly and specifically defined.

[0072] In the present invention, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", "fixed" and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements, unless otherwise clearly defined. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0073] In the present utility model, unless otherwise clearly specified and limited, a first feature being "above" or "below" a second feature may mean that the first and second features are in direct contact, or the first and second features are in indirect contact through an intermediate medium. Moreover, a first feature being "above", "above" or "above" a second feature may mean that the first feature is directly above or obliquely above the second feature, or simply means that the first feature is higher in level than the second feature. A first feature being "below", "below" or "below" a second feature may mean that the first feature is directly below or obliquely below the second feature, or simply means that the first feature is lower in level than the second feature.

[0074] In the description of this specification, the description with reference to the terms "one embodiment", "some embodiments", "example", "specific example", or "some examples" etc. means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the utility model. In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described may be combined in any one or more embodiments or examples in a suitable manner. In addition, those skilled in the art may combine and combine the different embodiments or examples described in this specification and the features of the different embodiments or examples, without contradiction.

[0075] Although the embodiments of the present invention have been shown and described above, it can be understood that the above embodiments are exemplary and cannot be understood as limitations of the present invention. Ordinary technicians in the field can change, modify, replace and modify the above embodiments within the scope of the present invention.

Claims

1. An air supply device (10), characterized in that: The air supply device (10) comprises a first outer shell (11) and a second outer shell (12); the first outer shell (11) has an air inlet duct (101); a volute duct (102) connected to the air inlet duct (101) and an air outlet duct (103) connected to the volute duct (102) are constructed between the first outer shell (11) and the second outer shell (12); in a radially outward direction along the volute duct (102), the air outlet duct (103) is inclined in a direction away from the air inlet duct (101).

2. The air supply device (10) according to claim 1, characterized in that: The first housing (11) is configured as an integral molding; and / or the second housing (12) is configured as an integral molding.

3. The air supply device (10) according to claim 2, characterized in that: The first shell (11) is configured as a plastic shell; or, the second shell (12) is configured as a plastic shell; or, the first shell (11) is configured as a BMC shell; or, the second shell (12) is configured as a BMC shell.

4. The air supply device (10) according to claim 1, characterized in that: The first shell (11) includes a first side panel (113) and a first end panel (111) connected to one side edge of the first side panel (113); the second shell (12) includes a second side panel (123) and a second end panel (122) connected to one side edge of the second side panel (123); the other side edge of the first side panel (113) and the other side edge of the second side panel (123) are connected to construct the volute air duct (102).

5. The air supply device (10) according to claim 4, characterized in that: The first end plate (111) is provided with an air inlet (1021), and the first housing (11) further comprises a third side plate (114), the air inlet duct (101) is constructed in the third side plate (114), the third side plate (114) is connected to the first end plate (111), and the air inlet duct (101) is connected to the air inlet (1021).

6. The air supply device (10) according to claim 4, characterized in that: The first shell (11) further includes a fourth side plate (115), and the second shell (12) further includes a fifth side plate (124), and the fourth side plate (115) and the fifth side plate (124) are connected to each other and together form the air outlet duct (103).

7. The air supply device (10) according to claim 4, characterized in that: The first end plate (111) is provided with an air inlet (1021), and a flange (1102) is provided on the periphery of the air inlet (1021), and the flange (1102) is configured to extend obliquely from the air inlet duct (101) toward the volute duct (102).

8. The air supply device (10) according to any one of claims 1 to 7, characterized in that: The first shell (11) has a first side (1105), and the second shell (12) has a second side (1205). The first side (1105) has a first recess (1106) and a first protrusion (1107), and the first protrusion (1107) protrudes compared to the first recess (1106). The second side (1205) has a second recess (1206) and a second protrusion (1207), and the second protrusion (1207) protrudes compared to the second recess (1206). The first protrusion (1107) is arranged on the second recess (1206), and the second protrusion (1207) is arranged on the first recess (1106).

9. The air supply device (10) according to claim 1, characterized in that: A first dividing surface (1041) and a second dividing surface (1042) are provided between the first outer shell (11) and the second outer shell (12); the first dividing surface (1041) is arranged on a plane passing through the axis of the air outlet duct (103); and the second dividing surface (1042) is connected to the first dividing surface (1041) and is arranged on a normal plane to the axis of the volute duct (102).

10. The air supply device (10) according to claim 1, characterized in that: The air supply device (10) has mutually orthogonal front-to-back directions, up-down directions, and left-to-right directions, and the axis of the volute air duct (102) is configured to be inclined from the lower left to the upper right.

11. The air supply device (10) according to claim 10, characterized in that: The top wall of the air inlet duct (101) is configured to extend obliquely from the lower left to the upper right to the volute duct (102).

12. The air supply device (10) according to claim 10, characterized in that: The inlet axis of the air inlet duct (101) is parallel to the up-down direction, and the outlet axis of the air outlet duct (103) is parallel to the up-down direction.

13. The air supply device (10) according to claim 1, characterized in that: The air outlet duct (103) comprises a transition section (1031) and an air outlet section (1032); the air outlet section (1032) is inclined in a direction away from the air inlet duct (101) relative to the radial direction of the volute duct (102); a first end of the transition section (1031) is connected to the volute duct (102), and a second end is connected to the air outlet section (1032).

14. A gas water heater, characterized in that: include: The air supply device (10) according to any one of claims 1 to 13; A combustion chamber, the combustion chamber is connected to the air supply device (10) and communicated with the air inlet duct (101).

15. The gas water heater according to claim 14, characterized in that: The air inlet duct (101) is arranged above the combustion chamber.

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