Fan casing structure and fan system of hot water equipment

Abstract

The present invention discloses a fan housing structure and a fan system of a hot water device, in which the airflow enters the first ventilation flow channel from the first air inlet; then flows into the second ventilation flow channel from the first perforation; the airflow flowing into the second ventilation flow channel flows into the first air flow cavity, and finally is discharged from the first air outlet. Since the airflow passes through two perforations, namely the first perforation and the second perforation, during the circulation process, the incoming airflow is filtered by the two perforations, eliminating the chaotic amplitude and frequency in the airflow, causing the airflow spectrum to change during the flow process, reducing the noise generated when the airflow circulates, and effectively improving the user experience of the product. At the same time, the air intake path is changed so that the airflow flows through the first ventilation flow channel, the first perforation, the second ventilation flow channel and the second perforation in sequence before entering the first air flow cavity, which greatly improves the flow of the airflow and avoids the airflow passing directly in the fan housing structure, thereby increasing the aerodynamic noise of the product.

Description

Technical Field

[0001] The present invention relates to the technical field of water heating equipment, and in particular to a fan casing structure and a fan system of a water heating equipment. Background Art

[0002] Traditionally, the fan systems used in gas water heaters or heating furnaces have typically utilized centrifugal fans, typically consisting of a fan and a volute. In actual operation, airflow enters the impeller space directly from the first air inlet of the volute and is discharged through the air outlet. This high level of noise generated during airflow delivery contributes to the overall loudness of the water heater during operation, severely diminishing the user experience. Furthermore, flaws in the volute's structural design create eddy currents within the centrifugal fan system's internal air ducts, further increasing the overall system noise. Summary of the Invention

[0003] Based on this, the first technical problem solved by the present invention is to provide a fan casing structure to improve airflow and avoid vortices during airflow operation; at the same time, change the airflow spectrum, reduce the noise generated during airflow circulation, and enhance the user experience of the product.

[0004] The second technical problem solved by the present invention is to provide a fan system for hot water equipment to improve airflow and avoid vortexes during airflow operation; at the same time, change the airflow spectrum, reduce the noise generated during airflow circulation, and enhance the user experience of the product.

[0005] The technical solution is as follows:

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

[0007] A fan casing structure, the fan casing structure includes: an outer shell, the outer shell is provided with a first air flow cavity and a first air outlet, the first air outlet is connected to the first air flow cavity; and an air inlet component, the air inlet component is installed on the outer shell, a first ventilation flow channel and a second ventilation flow channel are provided in the air inlet component, a first perforation is provided on the side wall of the first ventilation flow channel, the first ventilation flow channel and the second ventilation flow channel are connected through the first perforation, a second perforation and a first air inlet connected to the first ventilation flow channel are provided on the air inlet component, and the second ventilation flow channel is connected to the first air flow cavity through the second perforation.

[0008] The fan casing structure described in the present invention has the following beneficial effects compared with the background technology: during the operation of the fan system, the fan, such as an axial flow fan, is started to drive the airflow. First, the airflow enters the first ventilation channel from the first air inlet; then flows into the second ventilation channel from the first perforation; the airflow flowing into the second ventilation channel flows into the first air flow cavity through the second perforation, and finally is discharged from the first air outlet. Since the airflow flows through two perforations during the circulation process, namely the first perforation and the second perforation, the incoming airflow is filtered by the two perforations, eliminating the chaotic amplitude and frequency in the airflow, causing the airflow spectrum to change during the flow process, reducing the noise generated during the airflow circulation, and effectively improving the user experience of the product. At the same time, this solution changes the air intake path so that the airflow flows through the first ventilation channel, the first perforation, the second ventilation channel and the second perforation in sequence before entering the first air flow cavity, greatly improving the flow of the airflow and avoiding the airflow flowing straight through the fan casing structure, which causes the aerodynamic noise of the product to increase.

[0009] The principle and effect of the present invention are further explained below in conjunction with the above scheme:

[0010] In one embodiment, there are multiple first and second perforations, and at least a portion of the first and second perforations are staggered on the air inlet assembly. This significantly extends the airflow path, preventing the airflow from flowing directly into the first airflow cavity, thereby reducing the noise generated by the airflow within the fan housing structure.

[0011] In one embodiment, the air intake assembly includes at least one air intake component, the outer shell is provided with at least one mounting hole connected to the first air flow cavity, the first ventilation flow duct, the second ventilation flow duct, the first perforation and the first air inlet are all arranged on the air intake component, a part of the air intake component extends into the first air flow cavity through the mounting hole, the second perforation is located in the first air flow cavity, and the first air inlet is located outside the first air flow cavity, thereby realizing the connection between the air intake assembly and the outer shell, ensuring smoother airflow.

[0012] In one embodiment, there are more than two air inlet components and more than two mounting holes, one end of the two or more air inlet components extends into the first air flow cavity through the corresponding mounting holes and is connected to each other, and the two or more second air flow channels are connected to each other.

[0013] In one embodiment, two or more first ventilation channels are connected to each other, and a partition plate is provided between every two first ventilation channels, and the first through holes are provided on opposite sides of the partition plate.

[0014] In one embodiment, the air inlet component includes a first closing plate, a first air inlet member and a second air inlet member sleeved on the outside of the first air inlet member, the first closing plate is arranged between the first air inlet member and the second air inlet member, and the first closing plate, the first air inlet member and the second air inlet member form the second ventilation flow channel, the first air inlet and the first ventilation flow channel are both arranged on the first air inlet member, one end of two or more first air inlet members pass through the corresponding mounting holes to be connected to each other, one end of two or more second air inlet members pass through the corresponding mounting holes to be connected to each other, and the two or more second ventilation flow channels are connected to each other.

[0015] In one embodiment, the fan housing structure further includes an air outlet assembly, the air outlet assembly being provided with a second air flow channel and a second air inlet and a second air outlet respectively connected to the second air flow channel, the second air inlet being connected to the first air outlet. Thus, when air is discharged from the first air outlet, it enters the air outlet assembly and is then completely discharged from the second air outlet.

[0016] In one embodiment, the air outlet assembly includes a noise reduction chamber, and a third perforation is provided on the sidewall of the second airflow channel. The second airflow channel communicates with the noise reduction chamber through the third perforation. This allows the sound waves entering the noise reduction chamber to be refracted back and forth, offsetting and weakening them, thereby significantly reducing the sound waves in that portion and ensuring low noise levels in the exhaust airflow.

[0017] In one embodiment, the cross-sectional area S of the second air flow channel gradually increases from the second air inlet to the second air outlet, which helps to make the air flow more stable and smooth.

[0018] In one embodiment, the air outlet assembly includes a second closing plate, a third closing plate, a first air outlet piece and a second air outlet piece arranged outside the first air outlet piece, the second closing plate is arranged between one end of the first air outlet piece and one end of the second air outlet piece, the third closing plate is arranged between the other end of the first air outlet piece and the other end of the second air outlet piece, the second closing plate, the third closing plate, the first air outlet piece and the second air outlet piece form a noise reduction chamber, and the second air flow cavity, the second air inlet and the second air outlet are all arranged on the first air outlet piece.

[0019] In one embodiment, a fixing bracket is provided on the side wall of the first air flow channel, and the fixing bracket is used to install the axial flow fan. In this way, the fixing bracket ensures that the axial flow fan is stably installed in the housing.

[0020] In one embodiment, the fan casing structure includes a base, and the outer shell is mounted on the base.

[0021] The second technical problem mentioned above is solved by the following technical solution:

[0022] A fan system for a water heating device comprises an axial flow fan and a fan casing structure as described above, wherein the axial flow fan comprises a motor and an impeller mounted on the output shaft of the motor, and the motor is mounted on the side wall of the first air flow cavity.

[0023] The fan system of the water heater described in the present invention has the following beneficial effects compared with the background technology: during the operation of the fan system, the axial flow fan is started to drive the airflow. First, the airflow enters the first ventilation channel from the first air inlet; then flows into the second ventilation channel from the first perforation; the airflow flowing into the second ventilation channel flows into the first airflow cavity through the second perforation, and finally is discharged from the first air outlet. Since the airflow flows through two perforations during the circulation process, namely the first perforation and the second perforation, the incoming airflow is filtered by the two perforations, eliminating the chaotic amplitude and frequency in the airflow, causing the airflow spectrum to change during the flow process, reducing the noise generated during the airflow circulation, and effectively improving the user experience of the product. At the same time, this solution changes the air intake path so that the airflow flows through the first ventilation channel, the first perforation, the second ventilation channel and the second perforation in sequence before entering the first airflow cavity, greatly improving the flow of the airflow and avoiding the airflow flowing straight through the fan housing structure, which causes the aerodynamic noise of the product to increase. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 This is a structural diagram of a fan system of a water heater according to an embodiment of the present invention;

[0025] Figure 2 This is an exploded schematic diagram of the fan system structure of a water heater according to one embodiment of the present invention;

[0026] Figure 3 A cross-sectional view of the fan system structure of a water heater according to an embodiment of the present invention;

[0027] Figure 4 This is a schematic structural diagram of an air outlet assembly according to an embodiment of the present invention;

[0028] Figure 5 This is a schematic diagram of the housing structure according to an embodiment of the present invention;

[0029] Figure 6 This is a cross-sectional view of the housing structure according to an embodiment of the present invention.

[0030] Description of reference numerals:

[0031] 100. Fan casing structure, 110. Housing, 111. First air flow cavity, 112. Mounting hole, 113. First air outlet, 120. Air inlet assembly, 121. Air inlet component, 1211. First air inlet member, 1212. Second air inlet member, 1213. First closing plate, 122. First ventilation channel, 1221. First perforation, 123. First air inlet, 124. Second ventilation channel, 125. Second perforation , 126, partition plate, 130, air outlet assembly, 131, second air inlet, 132, second air flow cavity, 1321, third perforation, 133, noise reduction chamber, 134, second air outlet, 135, first air outlet member, 136, second air outlet member, 137, third closing plate, 138, fourth closing plate, 140, base, 150, fixed bracket, 200, axial flow fan, 210, motor, 220, impeller. DETAILED DESCRIPTION

[0032] In order to make the purpose, technical solutions and advantages of the present invention more clearly understood, the present invention is further described in detail below in conjunction with the accompanying drawings and specific embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention and do not limit the scope of protection of the present invention.

[0033] It should be noted that when an element is referred to as being "fixed to" another element, it may be directly attached to the other element or there may be an intermediate element. When an element is referred to as being "connected to" another element, it may be directly connected to the other element or there may be an intermediate element. The terms "vertical," "horizontal," "left," "right," and similar expressions used herein are for illustrative purposes only and do not represent the only implementation methods.

[0034] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by those skilled in the art to which this invention pertains. The terms used herein in the specification of the present invention are for the purpose of describing specific embodiments only and are not intended to limit the present invention. The term "and / or" as used herein includes any and all combinations of one or more of the associated listed items.

[0035] The "first" and "second" in the present invention do not represent specific quantities and orders, but are only used to distinguish names.

[0036] In one embodiment, please refer to Figure 1 、 Figure 2 and Figure 3A fan casing structure 100 includes: an outer shell 110 and an air inlet assembly 120. The outer shell 110 is provided with a first air flow cavity 111 and a first air outlet 113. The first air outlet 113 is connected to the first air flow cavity 111. The air inlet assembly 120 is mounted on the outer shell 110, and a first ventilation flow channel 122 and a second ventilation flow channel 124 are provided in the air inlet assembly 120. A first through-hole 1221 is provided on the side wall of the first ventilation flow channel 122, and the first ventilation flow channel 122 and the second ventilation flow channel 124 are connected through the first through-hole 1221. A second through-hole 125 and a first air inlet 123 connected to the first ventilation flow channel 122 are provided on the air inlet assembly 120. The second ventilation flow channel 124 is connected to the first air flow cavity 111 through the second through-hole 125.

[0037] The above-mentioned fan housing structure 100 starts the fan, such as the axial flow fan 200, during the operation of the fan system to drive the airflow. First, the airflow enters the first ventilation channel 122 from the first air inlet 123; then flows into the second ventilation channel 124 from the first perforation 1221; the airflow flowing into the second ventilation channel 124 flows into the first airflow cavity 111 through the second perforation 125, and finally is discharged from the first air outlet 113. Since the airflow passes through two perforations during the circulation process, namely the first perforation 1221 and the second perforation 125, the incoming airflow is filtered by the two perforations, eliminating the chaotic amplitude and frequency in the airflow, so that the airflow spectrum changes during the flow process, reducing the noise generated during the airflow circulation, and effectively improving the user experience of the product. At the same time, this embodiment changes the air intake path so that the airflow flows through the first ventilation channel 122, the first perforation 1221, the second ventilation channel 124 and the second perforation 125 in sequence before entering the first airflow cavity 111, which greatly improves the flow of airflow and avoids the airflow flowing straight through the fan housing structure 100, thereby increasing the aerodynamic noise of the product.

[0038] It should be noted that, in this embodiment, the positional relationship between the first ventilation flow channel 122 and the second ventilation flow channel 124 is as follows: 1. The first ventilation flow channel 122 and the second ventilation flow channel 124 are arranged side by side, that is, the first ventilation flow channel 122 and the second ventilation flow channel 124 are spaced apart up and down, the first ventilation flow channel 122 and the second ventilation flow channel 124 are spaced apart left and right, the first ventilation flow channel 122 and the second ventilation flow channel 124 are spaced apart front and back, etc.; 2. The second ventilation flow channel 124 is sleeved outside the first ventilation flow channel 122, that is, the first ventilation flow channel 122 and the second ventilation flow channel 124 are spaced apart in a ring shape from the inside to the outside.

[0039] It should be noted that, in this embodiment, the second ventilation duct 124 is connected to the first air flow cavity 111 through the second perforation 125 by: directly inserting part of the air inlet assembly 120 into the outer shell 110, so that the second perforations 125 are all located in the first air flow cavity 111; or, attaching one side of the air inlet assembly 120 to the outer shell 110, and respectively providing a second perforation 125 and an opening between the fitting surfaces of the air inlet assembly 120 and the outer shell 110, so as to realize the second ventilation duct 124 being connected to the first air flow cavity 111 through the second perforation 125.

[0040] It should also be noted that the frequency spectrum in this embodiment is short for frequency spectral density, which is a frequency distribution curve. Complex oscillations are decomposed into harmonic oscillations with different amplitudes and frequencies. The amplitudes of these harmonic oscillations are arranged by frequency to form a frequency spectrum. Meanwhile, aerodynamic noise is a sound directly generated by airflow with chaotic amplitudes and frequencies, and statistically irregular.

[0041] Optionally, this embodiment does not specifically limit the structural shape of the air intake assembly. It is sufficient that the air intake assembly has airflow channels comprising the first airflow channel 122, the first through-hole 1221, the second airflow channel 124, and the second through-hole 125. For example, the air intake assembly may have a cylindrical structure, a square structure, a polygonal prism structure, etc. Furthermore, the first airflow channel 122 and the second airflow channel 124 may also have various shapes.

[0042] For further information, please refer to Figure 3 There are multiple first through-holes 1221 and multiple second through-holes 125, and at least a portion of the first through-holes 1221 and at least a portion of the second through-holes 125 are staggered on the air inlet assembly 120. As can be seen, when the airflow enters the first through-hole 1221 and exits the second through-hole 125, the airflow follows an S-shaped or zigzag trajectory. This significantly extends the airflow path, preventing the airflow from flowing straight through and directly entering the first airflow cavity 111, thereby reducing the noise generated by the airflow within the fan casing structure 100. Furthermore, in this embodiment, the first through-holes 1221 and the second through-holes 125 are staggered, allowing the airflow to refract back and forth and offset each other in the second airflow channel 124, filtering out chaotic amplitude and frequency sound waves in the airflow and ensuring a lower output aerodynamic noise.

[0043] It should be noted that the staggered distribution of at least a portion of the first through-holes 1221 and at least a portion of the second through-holes 125 on the air inlet assembly should be understood as follows: there are multiple first through-holes 1221, the multiple first through-holes 1221 are spaced apart and form a first hole area. There are multiple second through-holes 125, the multiple second through-holes 125 are spaced apart and form a second hole area, and at least a portion of the second hole area is staggered with at least a portion of the first hole area. Of course, in other embodiments, the first hole area and the second hole area do not overlap, that is, the first through-holes and the second through-holes are completely staggered.

[0044] In one embodiment, please refer to Figure 1 and Figure 3 , the air inlet assembly 120 includes at least one air inlet component 121. The outer shell 110 is provided with at least one mounting hole 112 connected to the first air flow channel 111. The first ventilation flow channel 122, the second ventilation flow channel 124, the first perforation 1221 and the first air inlet 123 are all arranged on the air inlet component 121. A part of the air inlet component 121 extends into the first air flow channel 111 through the mounting hole 112. The second perforation 125 is located in the first air flow channel 111, and the first air inlet 123 is located outside the first air flow channel 111. It can be seen that the structural relationship between the air inlet assembly 120 and the outer shell 110 of this embodiment is that the air inlet assembly 120 is inserted into the outer shell 110, so that the second perforation 125 is located in the first air flow channel 111, so as to realize the communication between the air inlet assembly 120 and the outer shell 110, and ensure smoother air flow. Meanwhile, the air intake assembly 120 of this embodiment may include a single air intake component 121; it may also include multiple air intake components 121. When the air intake assembly 120 includes multiple air intake components 121, the air intake assembly 120 extends into the first airflow channel 111. The portions extending into the first airflow channel 111 may be interconnected, or they may be unconnected and independently structured. If the portions extending into the first airflow channel 111 are independent and unconnected, the first ventilation channel 122 and the second ventilation channel 124 are both designed as blind holes to prevent airflow from directly flowing into the first airflow channel 111 from one end of the first ventilation channel 122 or the second ventilation channel 124.

[0045] For further information, please refer to Figure 1 and Figure 3There are more than two air inlet components 121 and mounting holes 112. One end of the two or more air inlet components 121 extends into the first airflow channel 111 through the corresponding mounting holes 112 and is interconnected, and the two or more second ventilation channels 124 are interconnected. In this way, the interconnection ensures the structural stability of the one end of the two or more air inlet components 121 in the first airflow channel 111. At the same time, the two or more second ventilation channels 124 are interconnected, so that the airflow entering from different air inlet components 121 eventually converges in the second ventilation channel 124, thereby allowing the airflow to be uniformly discharged into the first airflow channel 111.

[0046] It should be noted that the interconnection of one end of two or more air inlet components 121 within the first airflow channel 111 should be understood as: all air inlet components 121 extending into the first airflow channel 111 are connected together. When there are two air inlet components 121, the two air inlet components 121 are connected within the first airflow channel 111, and the specific structure can refer to or be similar to a two-way pipe structure. When there are multiple air inlet components 121, the multiple air inlet components 121 are connected within the first airflow channel 111, and the specific structure can refer to or be similar to a three-way pipe structure, a four-way pipe structure, or a multi-way pipe structure.

[0047] Of course, it should also be noted that when there are more than three air inlet components 121, the connection method of one end of the more than three air inlet components 121 in the first air flow cavity 111 can be: using a multi-way joint, and the connection method between the joint and the air inlet component 121 is a threaded connection or a snap connection; or, the shell 110 is designed as a two-part detachable connection structure. During the installation of the air inlet component 121, the shell 110 is disassembled, and then multiple air inlet components 121 are connected to each other. Then, the two-part structure of the shell 110 is closed. In order to improve the air tightness between the two-part structure, a sealing strip can be added between the two-part structure.

[0048] Specifically, please refer to Figure 3 and Figure 6 , there are two air inlet components 121 and two mounting holes 112. The two mounting holes 112 are arranged opposite to each other on the outer shell 110. The two air inlet components 121 are connected to form a straight integrated structure, and the two first ventilation channels 122 are connected, and the two second ventilation channels 124 are circulated. At this time, the air inlet component 120 of this embodiment can be understood as an integral structure, which is provided with a first ventilation channel 122 and a second ventilation channel 124 inside, and a first air inlet 123 is provided at both opposite ends. In this way, during the installation process, the air inlet component 120 only needs to be inserted into one of the mounting holes 112 and extended from the other mounting hole 112, which greatly improves the assembly efficiency of the fan casing structure 100. Of course, in other embodiments, the two air inlet components 121 can be arranged at an angle.

[0049] In one embodiment, please refer to Figure 3 Two or more first air passages 122 are interconnected, and a partition plate 126 is provided between each pair of first air passages 122. First through-holes 1221 are provided on opposite sides of the partition plate 126. Thus, the partition plate 126 disconnects each pair of first air passages 122, ensuring that airflow entering from different directions enters the second air passage 124 through different first through-holes 1221, thereby ensuring smooth airflow and preventing interference and turbulence.

[0050] Specifically, please refer to Figure 3 There are two air inlet components 121, and the two air inlet components 121 are connected. The two first air flow channels 122 are connected to each other, a partition plate 126 is provided between the two first air flow channels 122, and the two second air flow channels 124 are connected to each other.

[0051] In one embodiment, please refer to Figure 3 The air inlet component 121 includes a first closing plate 1213, a first air inlet component 1211 and a second air inlet component 1212 sleeved outside the first air inlet component 1211. The first closing plate 1213 is arranged between the first air inlet component 1211 and the second air inlet component 1212, and the first closing plate 1213, the first air inlet component 1211 and the second air inlet component 1212 form a second ventilation flow channel 124. The first air inlet 123 and the first ventilation flow channel 122 are both arranged on the first air inlet component 1211. One end of two or more first air inlet components 1211 passes through the corresponding mounting hole 112 to connect with each other, one end of two or more second air inlet components 1212 passes through the corresponding mounting hole 112 to connect with each other, and the two or more second ventilation flow channels 124 are connected to each other. It can be seen that the air inlet component 121 of this embodiment is a sleeve structure, that is, the second ventilation flow channel 124 is sleeved outside the first ventilation flow channel 122.

[0052] It should be noted that the apertures of the first and second perforations 1221 and 125 are both less than 1.2 mm, and the total area of ​​all first perforations 1221 is 1% to 5% of the total surface area of ​​all first air inlet members 1211. Simultaneously, the total area of ​​all second perforations 125 is 1% to 5% of the total surface area of ​​all second air inlet members 1212. Furthermore, the spacing between the first and second air inlet members 1211 and 1212 is 5 mm to 15 mm, and the thickness of each of the first and second air inlet members 1211 and 1212 is less than 1.2 mm. This improves the sound absorption and noise reduction effects of the fan casing structure 100.

[0053] Optionally, the first air inlet member 1211 and the second air inlet member 1212 may both be cylindrical structures, square structures, polygonal prism structures, etc.

[0054] Specifically, please refer to Figure 3The air inlet components 121 are two connected: two first air inlet components 1211 and two second air inlet components 1212. A partition plate 126 is provided within the connected second air inlet components 1212. Both the first air inlet components 1211 and the second air inlet components 1212 are tubular structures. Airflow can only enter the system through the first air inlet ports 123 of the two first air inlet components 1211.

[0055] In one embodiment, please refer to Figure 3 and Figure 4 The fan housing structure 100 further includes an air outlet assembly 130. The air outlet assembly 130 is provided with a second air flow channel 132 and a second air inlet 131 and a second air outlet 134, respectively connected to the second air flow channel 132. The second air inlet 131 is connected to the first air outlet 113. As can be seen, when air is discharged from the first air outlet 113, it enters the air outlet assembly 130 and is then completely discharged through the second air outlet 134.

[0056] Optionally, the air outlet assembly 130 is connected to the housing 110 by bolt connection, bonding, clamping, welding, integrated molding, etc.

[0057] For further information, please refer to Figure 4 , a noise reduction chamber 133 is provided in the air outlet component 130. A third perforation 1321 is provided on the side wall of the second air flow channel 132. The second air flow channel 132 is connected to the noise reduction chamber 133 through the third perforation 1321. It can be seen that when the air flow flows along the side wall of the second air flow channel 132, the third perforation 1321 on the side wall of the second air flow channel 132 and the noise reduction chamber 133 are equivalent to a silencer structure for the air flow. Through the third perforation 1321, the chaotic sound waves in the air flow, such as sound waves with relatively chaotic amplitude and frequency, are absorbed, so that the sound waves enter the noise reduction chamber 133 for back and forth reflection, offset and weakening, thereby greatly weakening the sound waves of this part, ensuring that the amount of noise of the discharged air flow is small.

[0058] For further information, please refer to Figure 4 The cross-sectional area S of the second airflow channel 132 gradually increases from the second air inlet 131 to the second air outlet 134. Therefore, the second airflow channel 132 is trumpet-shaped, with the end away from the housing 110 being larger than the end close to the housing 110, which helps to make the airflow more stable and smooth.

[0059] In one embodiment, please refer to Figure 4The air outlet assembly 130 includes a second closing plate, a third closing plate 137, a first air outlet piece 135 and a second air outlet piece 136 sleeved outside the first air outlet piece 135. The second closing plate is arranged between one end of the first air outlet piece 135 and one end of the second air outlet piece 136. The third closing plate 137 is arranged between the other end of the first air outlet piece 135 and the other end of the second air outlet piece 136. The second closing plate, the third closing plate 137, the first air outlet piece 135 and the second air outlet piece 136 form a noise reduction chamber 133. The second air flow cavity 132, the second air inlet 131 and the second air outlet 134 are all arranged on the first air outlet piece 135. It can be seen that the air outlet assembly 130 of this embodiment is a sleeve structure, that is, the noise reduction chamber 133 is sleeved outside the second air flow cavity 132.

[0060] It should be noted that the diameter of each third through-hole 1321 is less than 1.2 mm, and the combined area of ​​all third through-holes 1321 is 1% to 5% of the surface area of ​​the first outlet member 135. Furthermore, the spacing between the first outlet member 135 and the second outlet member 136 is 5 mm to 15 mm, and the thickness of each of the first and second outlet members 135 and 136 is less than 1.2 mm. This enhances the sound absorption and noise reduction properties of the fan casing structure 100.

[0061] Optionally, the second air flow channel 132 may be in a cylindrical, square, or polygonal shape.

[0062] In one embodiment, please refer to Figure 3 、 Figure 5 and Figure 6 A fixing bracket 150 is provided on the side wall of the first air flow channel 111. The fixing bracket 150 is used to install the axial flow fan 200. In this way, the fixing bracket 150 ensures that the axial flow fan 200 is stably installed in the housing 110.

[0063] Optionally, the axial fan 200 may be mounted on the fixing bracket 150 by bolt connection, pin connection, riveting, clamping, etc.

[0064] For further information, please refer to Figure 5 Multiple fixing brackets 150 are provided, spaced apart along the circumference of the housing 110. This ensures more stable installation of the axial flow motor 210 and stable operation of the axial flow motor 210. Furthermore, at least one fixing bracket 150 is hollow, facilitating electrical connection between the axial flow motor 210 and an external power source.

[0065] Specifically, the number of the fixing brackets 150 is 3 to 5.

[0066] In one embodiment, please refer to Figure 2The fan housing structure 100 includes a base 140. The housing 110 is mounted on the base 140. Thus, the fan housing structure 100 can be stably installed in the water heater through the base 140.

[0067] In one embodiment, please refer to Figure 1 、 Figure 2 and Figure 3 A fan system for a water heater includes an axial flow fan 200 and a fan housing structure 100 according to any of the above embodiments. The axial flow fan 200 includes a motor 210 and an impeller 220 mounted on the output shaft of the motor 210. The motor 210 is mounted on the side wall of the first air flow channel 111.

[0068] The fan system of the above-mentioned hot water equipment starts the axial flow fan 200 during the operation of the fan system to drive the air flow. First, the air flow enters the first ventilation channel 122 from the first air inlet 123; then flows into the second ventilation channel 124 from the first perforation 1221; the air flow flowing into the second ventilation channel 124 flows into the first air flow cavity 111 through the second perforation 125, and finally is discharged from the first air outlet 113. Since the air flow passes through two perforations during the circulation process, namely the first perforation 1221 and the second perforation 125, the incoming air flow is filtered by the two perforations, eliminating the chaotic amplitude and frequency in the air flow, causing the air flow spectrum to change during the flow process, reducing the noise generated during the air flow circulation, and effectively improving the user experience of the product. At the same time, this embodiment changes the air intake path so that the airflow flows through the first ventilation channel 122, the first perforation 1221, the second ventilation channel 124 and the second perforation 125 in sequence before entering the first airflow cavity 111, which greatly improves the flow of airflow and avoids the airflow flowing straight through the fan housing structure 100, thereby increasing the aerodynamic noise of the product.

[0069] The technical features of the above-mentioned embodiments can be combined arbitrarily. In order to make the description concise, not all possible combinations of the technical features in the above-mentioned embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0070] The above-described embodiments merely illustrate several implementations of the present invention, and while their descriptions are relatively specific and detailed, they should not be construed as limiting the scope of the patent. It should be noted that a person skilled in the art would be able to make numerous variations and improvements without departing from the spirit of the present invention, all of which fall within the scope of protection of the present invention. Therefore, the scope of protection of the patent for this invention shall be determined by the appended claims.

Claims

1. A fan casing structure (100), characterized in that: The fan casing structure (100) comprises: A housing (110), wherein the housing (110) is provided with a first air flow cavity (111) and a first air outlet (113), and the first air outlet (113) is in communication with the first air flow cavity (111); and An air intake assembly (120), the air intake assembly (120) is mounted on the housing (110), a first air flow channel (122) and a second air flow channel (124) are provided in the air intake assembly (120), a first perforation (1221) is provided on the side wall of the first air flow channel (122), the first air flow channel (122) and the second air flow channel (124) are communicated through the first perforation (1221), a second perforation (125) and a first air inlet (123) communicated with the first air flow channel (122) are provided on the air intake assembly (120), the second air flow channel (124) is communicated with the first air flow cavity (111) through the second perforation (125), and the length directions of the first air flow channel (122) and the second air flow channel (124) respectively intersect with the length direction of the first air flow cavity (111); Two or more of the first ventilation channels (122) are connected to each other, and a partition plate (126) is provided between each two of the first ventilation channels (122), and the first through holes (1221) are provided on opposite sides of the partition plate (126); The air inlet assembly (120) includes an air inlet component (121); the housing (110) is provided with a mounting hole (112) communicating with the first air flow cavity (111); and there are more than two of the air inlet component (121) and the mounting hole (112); The air inlet component (121) includes a first closing plate (1213), a first air inlet member (1211) and a second air inlet member (1212) sleeved outside the first air inlet member (1211); the first closing plate (1213) is arranged between the first air inlet member (1211) and the second air inlet member (1212); and the first closing plate (1213), the first air inlet member (1211) and the second air inlet member (1212) form the second air flow channel (124); the first air inlet (123) and the first air flow channel (122) are both arranged on the first air inlet member (1211); one end of two or more first air inlet members (1211) pass through the corresponding mounting hole (112) to be connected to each other; one end of two or more second air inlet members (1212) pass through the corresponding mounting hole (112) to be connected to each other; and the two or more second air flow channels (124) are connected to each other.

2. The fan casing structure (100) according to claim 1, characterized in that: There are multiple first perforations (1221) and multiple second perforations (125), and at least a portion of the first perforations (1221) and at least a portion of the second perforations (125) are staggered on the air inlet assembly (120).

3. The fan casing structure (100) according to claim 1, characterized in that: The first ventilation flow channel (122), the second ventilation flow channel (124), the first through hole (1221) and the first air inlet (123) are all arranged on the air inlet component (121), a portion of the air inlet component (121) extends into the first air flow cavity (111) through the mounting hole (112), the second through hole (125) is located in the first air flow cavity (111), and the first air inlet (123) is located outside the first air flow cavity (111).

4. The fan casing structure (100) according to claim 3, characterized in that: One end of the two or more air inlet components (121) extends into the first airflow cavity (111) through the corresponding mounting hole (112) and is connected to each other.

5. The fan casing structure (100) according to any one of claims 1 to 4, characterized in that: The fan casing structure (100) further includes an air outlet assembly (130), wherein the air outlet assembly (130) is provided with a second air flow cavity (132) and a second air inlet (131) and a second air outlet (134) respectively connected to the second air flow cavity (132), and the second air inlet (131) is connected to the first air outlet (113).

6. The fan casing structure (100) according to claim 5, characterized in that: A noise reduction chamber (133) is provided in the air outlet assembly (130), a third through-hole (1321) is provided on the side wall of the second air flow channel (132), and the second air flow channel (132) is connected to the noise reduction chamber (133) through the third through-hole (1321).

7. The fan casing structure (100) according to claim 6, characterized in that: The cross-sectional area S of the second air flow channel (132) gradually increases from the second air inlet (131) to the second air outlet (134).

8. The fan casing structure (100) according to claim 6, characterized in that: The air outlet assembly (130) includes a second closing plate, a third closing plate (137), a first air outlet piece (135) and a second air outlet piece (136) sleeved outside the first air outlet piece (135); the second closing plate is arranged between one end of the first air outlet piece (135) and one end of the second air outlet piece (136); the third closing plate (137) is arranged between the other end of the first air outlet piece (135) and the other end of the second air outlet piece (136); the second closing plate, the third closing plate (137), the first air outlet piece (135) and the second air outlet piece (136) form a noise reduction chamber (133); the second air flow cavity (132), the second air inlet (131) and the second air outlet (134) are all arranged on the first air outlet piece (135).

9. The fan casing structure (100) according to any one of claims 1 to 4, characterized in that: A fixing bracket (150) is provided on the side wall of the first airflow cavity (111), and the fixing bracket (150) is used to install the axial flow fan (200); or, The fan casing structure (100) comprises a base (140), and the outer shell (110) is mounted on the base (140).

10. A fan system for a water heater, characterized in that: The invention comprises an axial flow fan (200) and a fan casing structure (100) according to any one of claims 1 to 9, wherein the axial flow fan (200) comprises a motor (210) and an impeller (220) mounted on an output shaft of the motor (210), and the motor (210) is mounted on a side wall of the first air flow channel (111).

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