Silencing and filtering device and gas heating water heater

Abstract

The utility model discloses a silencing and filtering device and a gas heating water heater. The device comprises a shell and a silencing filter, the silencing filter comprises an air inlet steady flow disc, a filter ring, a steady flow pipe and an air outlet fixed disc, and the air inlet steady flow disc is provided with an air inlet hole; a first air buffering air duct is arranged between the filter ring and the inner wall of the shell, and the filter ring is provided with filter holes; a second air buffering air channel is arranged between the flow stabilizing pipe and the filtering ring, flow stabilizing holes are formed in the flow stabilizing pipe, and air outlet holes are formed in the air outlet fixing disc. According to the silencing and filtering device, the filtering ring can effectively filter large-particle dust in the air, then the air inlet flow of the air can be stabilized under the action of the air inlet flow stabilizing disc, the flow stabilizing pipe and the air outlet fixing disc, and the problem of low-fire and low-frequency noise caused by fan rotating speed fluctuation and air flow disturbance during small-load operation is solved.

Description

TECHNICAL FIELD

[0001] The utility model relates to the technical field of sound attenuation filter, specifically relates to a sound attenuation filter device and gas heating water heater. BACKGROUND

[0002] Full premix gas heating water heater is that before the combustion of gas, negative pressure is generated in the premixer by the rotation of the fan, the air inside the heating furnace is sucked into the premixer, and at the same time, the gas proportional valve is opened, the gas enters the premixer, so that the gas and air are fully premixed in the premixer according to the proportion.

[0003] The full premix burner has the advantages of fast combustion speed, full combustion, less nitrogen oxide emission and low noise, and is widely used, especially in condensing water heaters and full premix gas heating water heaters. However, the full premix gas heating water heater has certain requirements for the use environment. If the boiler is used in a dusty or sandy environment, the fan is easy to accumulate dust and wear the fan blade, the burner air hole is easy to block, etc., which leads to insufficient combustion of the boiler, gas waste, reduced efficiency, and even affects the normal operation and reduces the service life. At present, the full premix gas heating water heater on the market is generally in a small fire state or low load operation, which is easy to produce low frequency noise, affecting the user experience.

[0004] In the prior art, an air sound attenuation filter is disclosed, which comprises a shell, a sound attenuation cavity, sound attenuation cotton and a filter core installed in the sound attenuation cavity. The filter core is arranged on the upper part of the sound attenuation cotton. Through the synergistic effect of the filter core and the sound attenuation cotton, the sound attenuation filter has the dual effects of sound attenuation and filtration. However, in the above-mentioned technology, the hole positions of the filter core and the sound attenuation cotton are small holes. Although the sound attenuation effect is good, in the initial use, the small fire state or low load operation state will lead to insufficient air volume, resulting in increased fan power. In long-term use, due to the accumulation of dust, the air draft effect of the fan becomes worse and worse, the fan power is further increased, and even the air-fuel ratio may be affected, the combustion effect is affected, the combustion is unstable, and the nitrogen compound control is unstable, thereby affecting the final performance of the water heater. UTILITY MODEL CONTENTS

[0005] In order to overcome the shortcomings of the prior art, one of the purposes of the utility model is to provide a sound attenuation filter device to solve the above-mentioned traditional problems.

[0006] One of the purposes of the utility model is to provide a gas heating water heater using the sound attenuation filter device.

[0007] One of the purposes of the utility model is achieved by the following technical scheme:

[0008] The utility model provides an acoustic filter device, including the shell and acoustic filter with air inlet and air outlet, the shell is equipped with the acoustic cavity for installing acoustic filter, the acoustic filter includes the air inlet steady flow disc, filter ring, steady flow pipe and air outlet fixed disc, the circumference of air inlet steady flow disc is equipped with a plurality of air inlet, the filter ring is located between air inlet steady flow disc and air outlet fixed disc, and the first air buffer air channel is equipped between the filter ring and the inner wall of shell, and the filter ring is equipped with a plurality of filter hole, the steady flow pipe is located in the inside of filter ring, and the second air buffer air channel is equipped between the steady flow pipe and filter ring, and the steady flow pipe is equipped with a plurality of steady flow hole, and the air outlet fixed disc is equipped with air outlet, and the air inlet, air inlet, first air buffer air channel, filter hole, second air buffer air channel, steady flow hole, air outlet, air outlet are sequentially communicated to form the air circulation acoustic filter channel.

[0009] Preferably, the filter ring is filter cotton or filter screen.

[0010] Preferably, the air inlet hole diameter is 1 / 15-1 / 10 times of the inner diameter of the acoustic cavity.

[0011] Preferably, the air inlet hole diameter is equal to the steady flow hole diameter.

[0012] Preferably, the air inlet steady flow disc is provided with a first fixing part and a second fixing part, the air outlet fixed disc is provided with a third fixing part and a fourth fixing part, the first fixing part cooperates with the third fixing part to position the filter ring, and the second fixing part cooperates with the fourth fixing part to position the steady flow pipe.

[0013] Preferably, the shell is formed by buckling a first side pipe and a second side pipe.

[0014] Preferably, the first side pipe is provided with a plurality of buckling grooves, the second side pipe is provided with a plurality of clamping members, and each clamping member is clamped on the corresponding buckling groove.

[0015] Preferably, the shell is provided with a gas guide end and an air outlet end, the acoustic cavity and the air inlet are arranged in the gas guide end, the air inlet is arranged in a trumpet shape, and the air outlet end is arranged in an L shape.

[0016] Preferably, the maximum diameter of the air inlet is smaller than the inner diameter of the acoustic cavity, the inner diameter of the air outlet end is smaller than the inner diameter of the acoustic cavity, and the maximum diameter of the air inlet is larger than the outer diameter of the air outlet end.

[0017] The second purpose of the utility model is achieved by the following technical scheme:

[0018] A gas heating water heater comprises the acoustic filter device.

[0019] Compared with the prior art, the utility model has the beneficial effects that:

[0020] The silencing and filtering device of this utility model combines a shell and a silencing filter. The silencing filter includes an inlet flow stabilizing plate, a filter ring, a flow stabilizing pipe, and an outlet fixing plate. The filter ring can effectively filter out large particles of sand and dust in the air, effectively protecting the core components of the boiler from damage. Furthermore, through the function of the inlet flow stabilizing plate, the flow stabilizing pipe, and the outlet fixing plate, the airflow of the intake air can be stabilized, avoiding the problem of low-frequency noise caused by fan speed fluctuations and airflow disturbances during low-load operation. Attached Figure Description

[0021] Figure 1 This is a schematic diagram of the structure of the noise reduction and filtration device of this utility model;

[0022] Figure 2 for Figure 1 An exploded view of the noise-reducing filter device shown;

[0023] Figure 3 for Figure 2 An exploded view of the silencer filter shown;

[0024] Figure 4 for Figure 1 The diagram shows a cross-sectional view of the noise-absorbing filter device, with the direction of airflow indicated.

[0025] Figure 5 for Figure 1 The diagram shows the structure of a noise reduction and filtration device installed on a gas-fired heating and hot water boiler.

[0026] In the diagram: 100, silencer filter; 10, outer casing; 11, first air buffer duct; 12, second air buffer duct; 20, silencer filter; 21, air inlet flow stabilizer plate; 210, air inlet hole; 22, filter ring; 23, flow stabilizer pipe; 230, flow stabilizer hole; 24, air outlet fixing plate; 200, venturi; 300, fan; 400, combustion heat exchanger assembly. Detailed Implementation

[0027] To make the above-mentioned objects, features, and advantages of this utility model more apparent and understandable, the specific embodiments of this utility model will be described in detail below with reference to the accompanying drawings. Many specific details are set forth in the following description to provide a full understanding of this utility model. However, this utility model can be implemented in many other ways different from those described herein, and those skilled in the art can make similar modifications without departing from the spirit of this utility model. Therefore, this utility model is not limited to the specific embodiments disclosed below.

[0028] In the description of the utility model, it is necessary to understand that the terms "first", "second" are only for the purpose of description, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features limited by "first", "second" can be explicitly or implicitly included at least one feature. In the description of the utility model, the meaning of "a plurality of" is at least two, such as two, three, etc., unless otherwise specifically limited.

[0029] In the description of the utility model, it is necessary to understand that when one element is considered to be "connected" to another element, it can be directly connected to another element or there can be intermediate elements. On the contrary, when the element is called "directly" connected to another element, there is no intermediate element.

[0030] Please refer to Figures 1-5 , the sound filtering device 100 of a preferred embodiment of the utility model, for installing on a gas heating water furnace, for sound filtering to air, specifically, the sound filtering device 100 includes the shell 10 with air inlet and air outlet and sound filter 20, the shell 10 is equipped with the sound attenuation cavity for installing sound filter 20, sound filter 20 includes the air inlet steady flow disc 21 of upper end, filter ring 22, steady flow pipe 23 and the air outlet fixing disc 24 of lower end, the periphery of air inlet steady flow disc 21 is equipped with a plurality of air inlet holes 210, filter ring 22 is arranged between air inlet steady flow disc 21 and air outlet fixing disc 24, first air buffer air duct 11 is arranged between filter ring 22 and the inner wall of shell 10, filter ring 22 is equipped with a plurality of filter holes (the filter hole in the figure is not marked), steady flow pipe 23 is located inside filter ring 22, second air buffer air duct 12 is arranged between steady flow pipe 23 and filter ring 22, steady flow pipe 23 is equipped with a plurality of steady flow holes 230, air outlet fixing disc 24 is equipped with air outlet hole, air inlet, air inlet hole 210, first air buffer air duct 11, filter hole, second air buffer air duct 12, steady flow hole 230, air outlet hole, air outlet are sequentially communicated to form air circulation sound filtering channel.

[0031] The sound filtering device 100 described above cooperates with the shell 10 and the sound filter 20, wherein the sound filter 20 includes the air inlet steady flow disc 21, the filter ring 22, the steady flow pipe 23 and the air outlet fixing disc 24, etc. structure, the filter ring 22 can effectively filter out the large particles of dust in the air, effectively protect the core components of the boiler from being damaged, and then through the action of the air inlet steady flow disc 21, the steady flow pipe 23 and the air outlet fixing disc 24, the air flow of air inlet can be stabilized, and the small fire low frequency noise problem caused by air flow disturbance due to fan speed fluctuation when running at small load can be avoided.

[0032] In the embodiment, the filter ring 22 is filter cotton or filter screen, wherein the filter screen is adjusted to different mesh according to different regional requirements, and the filter cotton is adjusted to different mesh thickness according to different regional requirements, so that the mesh of the filter screen, the thickness of the filter cotton and other parameters are adjusted according to requirements, which will not be described here.

[0033] Optionally, the diameter of the air inlet hole 210 is 1 / 15-1 / 10 of the inner diameter of the sound attenuation cavity, such as 1 / 15, 1 / 14, 1 / 13, 1 / 12, 1 / 11, 1 / 10, etc. The diameter of the air inlet hole 210 is equal to the diameter of the steady flow hole 230. The first air buffer air duct 11 and the second air buffer air duct 12 are adjusted according to the diameter of the air inlet hole 210, so that they can achieve better effect of stabilizing the air flow. Specifically, the spacing of the first air buffer air duct 11 is equal to the spacing of the second air buffer air duct 12. In other embodiments, the diameter of the air inlet hole 210, the diameter of the steady flow hole 230, the size of the first air buffer air duct 11 and the second air buffer air duct 12 can be adjusted as needed, which will not be described here.

[0034] In the embodiment, the air inlet steady flow disc 21 is provided with a first fixing part and a second fixing part, and the air outlet fixing disc 24 is provided with a third fixing part and a fourth fixing part. The first fixing part cooperates with the third fixing part to position the filter ring 22, and the second fixing part cooperates with the fourth fixing part to position the steady flow pipe 23, so that the filter ring 22 and the steady flow pipe 23 can be positioned and fixed at fixed positions, avoiding the change of positions caused by the size of the air volume, and ensuring that the air can flow in the specified flow direction.

[0035] In one embodiment, the shell 10 is buckled by the first side pipe and the second side pipe, so that it is convenient to disassemble and assemble, and convenient to disassemble the sound attenuation filter 20 in the shell 10, replace the filter ring 22, or clean the air inlet steady flow disc 21 and the steady flow pipe 23. In the embodiment, the first side pipe is provided with a plurality of buckling grooves, and the second side pipe is provided with a plurality of clamping pieces. Each clamping piece is clamped on the corresponding buckling groove, which is convenient for sealing and disassembling. Optionally, the shell 10 is provided with a gas guide end and an air outlet end. The sound attenuation cavity and the air inlet are arranged in the gas guide end. The air inlet is arranged in a trumpet shape, which is convenient for air import. The air outlet end is arranged in an L shape, which further stabilizes the air flow to reduce noise. The maximum diameter of the air inlet is smaller than the inner diameter of the sound attenuation cavity. The inner diameter of the air outlet end is smaller than the inner diameter of the sound attenuation cavity. The maximum diameter of the air inlet is greater than the outer diameter of the air outlet end.

[0036] In other embodiments, such as Figure 5As shown, the utility model still provides a kind of gas heating hot water furnace, and the gas heating hot water furnace includes Venturi 200, fan 300, combustion heat exchanger assembly 400 and the sound-absorbing filter device 100 of above embodiment, the air outlet of sound-absorbing filter device 100 is connected with the air inlet end of Venturi 200, makes air enter Venturi 200 before, first pass through the filtering sound-absorbing of sound-absorbing filter device 100, so that it can effectively filter out the large particle dust in air effectively protect the core accessory of boiler from being damaged, can stabilize the air flow of air intake to avoid the small load operation due to fan speed fluctuation air flow disturbance resulting in small fire low frequency noise problem.

[0037] The technical features of the above-described embodiments can be combined arbitrarily, and to make the description concise, not all possible combinations of the technical features in the above-described embodiments are described, however, as long as the combination of the technical features does not exist contradictory, it should be considered as the scope of the present application.

[0038] The above-described embodiments only express several implementation manners of the utility model, and the description is more specific and detailed, but it should not be understood as the limitation of the scope of the utility model patent. It should be pointed out that for ordinary skilled in the art, without departing from the concept of the utility model, a number of variations and improvements can be made, which belong to the protection scope of the utility model. Therefore, the protection scope of the utility model patent should be subject to the appended claims.

Claims

1. A noise-reducing filter device, characterized in that, The device includes a housing with an air inlet and an air outlet, and a silencer filter. The housing has a silencer cavity for installing the silencer filter. The silencer filter includes an air inlet stabilizing plate, a filter ring, a stabilizing pipe, and an air outlet fixing plate. The air inlet stabilizing plate has multiple air inlet holes around its periphery. The filter ring is located between the air inlet stabilizing plate and the air outlet fixing plate. A first air buffer duct is provided between the filter ring and the inner wall of the housing. The filter ring has multiple filter holes. The stabilizing pipe is located inside the filter ring. A second air buffer duct is provided between the stabilizing pipe and the filter ring. The stabilizing pipe has multiple stabilizing holes. The air outlet fixing plate has an air outlet. The air inlet, air inlet holes, first air buffer duct, filter holes, second air buffer duct, stabilizing holes, air outlet, and air outlet are sequentially connected to form an airflow silencer filtration channel.

2. The noise-reducing filter device according to claim 1, characterized in that, The filter ring is a filter cotton or a filter screen.

3. The noise-reducing filter device according to claim 1, characterized in that, The diameter of the air inlet is 1 / 15 to 1 / 10 of the inner diameter of the silencer cavity.

4. The noise-reducing filter device according to claim 3, characterized in that, The diameter of the air inlet is equal to the diameter of the flow stabilizing orifice.

5. The noise-reducing filter device according to claim 1, characterized in that, The intake flow stabilizer plate is provided with a first fixing part and a second fixing part, and the outlet fixing plate is provided with a third fixing part and a fourth fixing part. The first fixing part cooperates with the third fixing part to position the filter ring, and the second fixing part cooperates with the fourth fixing part to position the flow stabilizer tube.

6. The noise-reducing filter device according to claim 1, characterized in that, The outer shell is formed by fastening together a first side tube and a second side tube.

7. The noise-reducing filter device according to claim 6, characterized in that, The first side tube is provided with multiple fastening grooves, and the second side tube is provided with multiple locking elements, each of which is locked onto the corresponding fastening groove.

8. The noise-reducing filter device according to claim 1, characterized in that, The outer casing is provided with an air guide end and an air outlet end. The silencer cavity and the air inlet are both located inside the air guide end. The air inlet is horn-shaped and the air outlet end is L-shaped.

9. The noise-reducing filter device according to claim 8, characterized in that, The maximum diameter of the air inlet is smaller than the inner diameter of the silencing cavity, the inner diameter of the air outlet is smaller than the inner diameter of the silencing cavity, and the maximum diameter of the air inlet is larger than the outer diameter of the air outlet.

10. A gas-fired heating and hot water boiler, characterized in that, Includes the noise-reducing filter device as described in any one of claims 1-9.

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