Air inlet valve with exhaust and noise reduction functions
By incorporating an exhaust silencing chamber and multiple silencing structures within the oxygen generator's intake valve, the problem of excessive nitrogen exhaust noise from the intake valve is solved, achieving both equipment compactness and noise reduction, thus meeting the requirements for convenience and small size.
Patent Information
- Application Number
- CN202520106576.X
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-01-17
- Publication Date
- 2025-12-30
- Estimated Expiration
- 2035-01-17
AI Technical Summary
The air intake valve of the existing oxygen generator is noisy during the nitrogen purging process. Adding a silencer would lead to complicated piping connections and an increase in the size of the oxygen generator, which would not meet the requirements of convenience and small size.
An intake valve with exhaust silencing function is designed. By setting an exhaust silencing chamber in the valve cover and adopting a multi-silencing structure, including exhaust ports of different diameters and silencing components, the valve is integrated to simplify pipeline connection, disperse airflow pressure, and reduce airflow velocity.
It effectively reduces noise, simplifies pipeline connections, maintains equipment compactness, meets lightweight requirements, and achieves excellent noise reduction effects.
Smart Images
Figure CN223740195U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of gas valve technology, and in particular to an intake valve with exhaust silencing function. Background Technology
[0002] An oxygen concentrator is a type of machine that produces oxygen. Its principle is to use air separation technology and molecular sieves to extract oxygen from the air. When the molecular sieve is pressurized, it can adsorb nitrogen in the air and collect the oxygen. When the pressure is reduced, the molecular sieve releases the adsorbed nitrogen back into the ambient air. When the pressure is increased again, it can adsorb nitrogen and produce oxygen again. The molecular sieve is not consumed.
[0003] When an oxygen concentrator is working, air is first compressed by the compressor and then enters the molecular sieve through the intake valve. At the same time, nitrogen is discharged through the intake valve. The intake valve is quite noisy during the nitrogen discharge process. In the existing technology, a silencer is added to the nitrogen discharge pipeline to solve the problem of high nitrogen discharge noise (such as Chinese utility model patent application number 2023217201040). Adding an extra silencer will make the pipeline connection complicated and increase the size of the oxygen concentrator, which does not meet people's demand for the convenience and small size of the oxygen concentrator. On the other hand, compressing the volume will inevitably lead to the noise reduction effect not meeting expectations. Summary of the Invention
[0004] In order to overcome the above-mentioned problems in the prior art, this utility model proposes an intake valve with exhaust silencing function.
[0005] The technical solution adopted by this utility model to solve its technical problem is: an intake valve with exhaust silencing function, comprising:
[0006] A valve seat, on which an air inlet and an air outlet are provided;
[0007] The valve cover has an exhaust silencer chamber inside;
[0008] The air intake passage, air outlet passage, and exhaust passage are all located inside the valve seat and are respectively connected to the air intake port, the air outlet port, and the exhaust silencer chamber;
[0009] A switching assembly for controlling the connection between the air intake channel and the air outlet channel, or for controlling the connection between the air outlet channel and the exhaust channel;
[0010] The exhaust passage is located between the valve seat and the valve cover. The exhaust silencing chamber includes a first chamber and a second chamber that are connected to each other, and the two chambers correspond to a first exhaust port and a second exhaust port with different diameters, respectively. The exhaust end is connected to the first chamber and / or the second chamber.
[0011] The aforementioned intake valve with exhaust silencing function has a valve seat that is detachably connected to the valve cover.
[0012] The aforementioned intake valve with exhaust silencing function has a filling component or a silencing component in the first chamber for changing the size of the first exhaust port.
[0013] The aforementioned intake valve with exhaust silencing function has a filling element or a silencing element in the second chamber for separating the internal space of the second chamber and connecting the separated internal spaces.
[0014] The aforementioned intake valve with exhaust silencing function has a first chamber connected to the first exhaust port and a second chamber connected to the second exhaust port. The volume of the first chamber is smaller than the volume of the second chamber, and the diameter of the first exhaust port is smaller than the diameter of the second exhaust port.
[0015] The aforementioned intake valve with exhaust silencing function includes a second chamber comprising a third chamber and a fourth chamber. The first chamber and the third chamber, as well as the third chamber and the fourth chamber, are connected through holes. The fourth chamber is connected to the second exhaust port.
[0016] The aforementioned intake valve with exhaust silencing function has an exhaust channel outlet connected to the third chamber, and the volume of the third chamber is larger than the volumes of the first chamber and the fourth chamber.
[0017] The aforementioned intake valve with exhaust silencing function has a filling element in the first chamber for changing the size of the exhaust port; and a silencing element in the third chamber, the volume of which is smaller than the volume of the third chamber.
[0018] The aforementioned intake valve with exhaust silencing function has a second exhaust port that extends into the compressor cavity of the oxygen generator.
[0019] The aforementioned intake valve with exhaust silencing function has an arc-shaped surface on the side of the valve cover away from the valve seat for fitting the molecular sieve cylinder in the oxygen generator.
[0020] The beneficial effects of this utility model are as follows: the exhaust silencing chamber is set inside the valve cover and highly integrated with the valve seat. Compared with the traditional external silencing structure, the spatial layout is optimized, making the equipment more compact and simplifying the pipeline connection. Noise reduction does not lead to an increase in the size of the oxygen generator. Two exhaust ports with different diameters are set up to disperse the nitrogen gas, disperse the airflow pressure, reduce the airflow velocity, and effectively reduce the noise at the same frequency. The filling material is set in the first chamber and the silencing material is set in the third chamber, which achieves the effect of diversion and silencing.
[0021] To meet the requirements of lightweight design, the valve seat is miniaturized, and an arc-shaped surface is set on the valve cover to match the shape of the molecular sieve cylinder, which can effectively save internal space in the oxygen generator.
[0022] This invention achieves good noise reduction through the design of multiple sound-absorbing structures, while also meeting the requirements for lightweight design and demonstrating strong practicality. Attached Figure Description
[0023] Figure 1 This is a schematic diagram of the present invention;
[0024] Figure 2 This is a schematic diagram of the valve cover and valve seat fitting together according to this utility model;
[0025] Figure 3 This is a top view of the valve seat and valve cover mating in this utility model;
[0026] Figure 4 This utility model Figure 3 Sectional view along the center AA;
[0027] Figure 5 This utility model Figure 3 Sectional view along the middle BB line;
[0028] Figure 6 This is a side view of the valve seat and valve cover mating in this utility model;
[0029] Figure 7 This utility model Figure 6 CC section view;
[0030] Figure 8 This utility model Figure 6 Sectional view along DD.
[0031] Among them, 1. valve seat, 2. valve cover, 3. switch assembly, 4. air inlet, 5. first exhaust port, 6. exhaust silencer chamber, 6-1. first chamber, 6-2. third chamber, 6-3. fourth chamber, 7. second exhaust port, 8. air outlet, 9. exhaust channel one, 10. exhaust channel two, 11. air inlet channel one, 12. air inlet channel two, 13. air outlet channel, 14. hole. Detailed Implementation
[0032] To enable those skilled in the art to better understand the technical solution of this utility model, the present utility model will be described in detail below with reference to the accompanying drawings and specific embodiments.
[0033] like Figure 1-2As shown, this embodiment discloses an intake valve with exhaust silencing function. A valve seat 1 has an intake port 4 and an outlet port 8. A valve cover 2 has an exhaust silencing chamber 6 inside. An intake channel, an outlet channel 13, and an exhaust channel are all located within the valve seat 1 and are connected to the intake port 4, the outlet port 8, and the exhaust silencing chamber 6, respectively. A switch assembly 3 is used to control the connection between the intake channel and the outlet channel 13, or to control the connection between the outlet channel 13 and the exhaust channel. The exhaust outlet of the exhaust channel is located between the valve seat 1 and the valve cover 2. The exhaust silencing chamber 6 includes a first chamber 6-1 and a second chamber connected to each other, and the two chambers correspond to a first exhaust port 5 and a second exhaust port 7 with different diameters, respectively. The exhaust outlet is connected to the first chamber 6-1 and / or the second chamber.
[0034] By placing the exhaust silencing chamber 6 inside the valve cover 2, it achieves a high degree of integration with the valve seat 1. Compared to traditional external silencing structures, this optimizes the spatial layout and makes the equipment more compact. Furthermore, considering that a single exhaust port could result in excessively high air pressure and fluid velocity, potentially causing a whistling effect, two exhaust ports of different diameters are provided. This effectively reduces noise at the same frequency and disperses airflow pressure, thus lowering the airflow velocity.
[0035] Specifically, in this embodiment, to reduce whistling and noise at the same frequency, the exhaust silencer 6 is divided into a first chamber 6-1 and a second chamber with different volumes. The first chamber 6-1 is connected to the first exhaust port 5, and the second chamber is connected to the second exhaust port 7. In one embodiment, the first chamber 6-1 and the second chamber can be arranged in layers, with the first chamber 6-1 located above the second chamber. To allow most of the gas to flow through the second chamber and reduce the gas pressure in the first chamber 6-1, the volume of the first chamber 6-1 is set smaller than that of the second chamber. Furthermore, to increase the gas flow rate into the second chamber, the diameter of the first exhaust port 5 is smaller than that of the second exhaust port 7. To further reduce noise from the gas discharged from the second exhaust port 7, in a specific embodiment, when the intake valve is installed in an oxygen concentrator, the second exhaust port 7 can be extended into the compressor chamber of the oxygen concentrator. The compressor chamber is a relatively independent space, which can reduce the impact of noise on other adjacent components, thereby achieving a noise reduction effect.
[0036] In one embodiment, to maximize airflow from the second exhaust port 7 and reduce the exhaust volume of the first exhaust port 5, thereby reducing exhaust noise, a filler is provided in the first chamber 6-1 to change the size of the exhaust port. This filler partially blocks the exhaust port, thus reducing the exhaust volume of the first exhaust port 5. Alternatively, to reduce exhaust noise from the first exhaust port 5, a silencer is provided in the first chamber 6-1, and the airflow is silenced before being discharged from the first exhaust port 5.
[0037] In one embodiment, when the exhaust outlet of the exhaust channel is connected to the second chamber, to further achieve the effect of flow diversion, a filling element can be provided in the second chamber to separate the internal space of the second chamber and connect the separated internal spaces. By setting the filling element, the second chamber is divided into multiple spaces. Since the separated spaces are connected, when the airflow enters the second chamber, it can enter multiple spaces respectively, and then flow to the first chamber 6-1 and be discharged from the first exhaust port 5, or be discharged through the second exhaust port 7. The effect of noise reduction is achieved through flow diversion. In another embodiment, to achieve noise reduction, a silencer can be provided in the second chamber. By setting the silencer, the noise of the airflow flowing in the second chamber can be reduced, thereby reducing the noise of the airflow being discharged from the exhaust port.
[0038] To further extend the airflow path and achieve a noise reduction effect, such as Figure 3-5 As shown, in this embodiment, the second chamber is divided into a third chamber 6-2 and a fourth chamber 6-3 that are connected. That is, the first chamber 6-1 is connected to the third chamber 6-2, and the third chamber 6-2 is connected to the fourth chamber 6-3. There are many ways to connect the chambers. In a specific embodiment, the first chamber 6-1 and the third chamber 6-2, and the third chamber 6-2 and the fourth chamber 6-3, can all be connected through the hole 14. In this embodiment, the fourth chamber 6-3 can be located below the third chamber 6-2, that is, the fourth chamber 6-3 is connected to the second exhaust port 7.
[0039] In one embodiment, such as Figure 7 As shown, the exhaust channel includes exhaust channel one 9 and exhaust channel two 10, with the exhaust outlet located at the end of exhaust channel two 10. In a specific embodiment, the exhaust outlet can be connected to the third chamber 6-2, that is, exhaust channel two 10 is connected to the third chamber 6-2. In order to further achieve the noise reduction effect, the volume of the third chamber 6-2 is larger than the volumes of the first chamber 6-1 and the fourth chamber 6-3, so that when the airflow is diverted from the third chamber 6-2 to the first chamber 6-1 and the fourth chamber 6-3, it can achieve the effect of variable diameter noise reduction.
[0040] In one embodiment, in order to reduce the exhaust volume of the first exhaust port 5, a filling element is provided in the first chamber 6-1 to change the size of the first exhaust port 5. The filling element partially blocks the first chamber 6-1, reducing the gas flow rate through the first exhaust port 5. In order to further reduce nitrogen exhaust noise, a silencer is provided in the third chamber 6-2 of the exhaust silencer 6. The volume of the silencer is smaller than that of the third chamber 6-2, so that nitrogen can flow through the inside of the silencer to silence the noise, or flow from the upper or lower part of the silencer to the second exhaust port 7 to achieve the effect of diversion and silencing.
[0041] For ease of machining and parts replacement, valve seat 1 and valve cover 2 are detachably connected.
[0042] In this embodiment, two switching components 3 are provided, and each switching component is a two-position three-way solenoid valve. The two switching components 3 work alternately to deliver compressed gas into the molecular sieve cylinder and discharge nitrogen gas from the molecular sieve cylinder. The three ports of the two-position three-way solenoid valve are respectively connected to the inlet channel, the outlet channel, and the exhaust channel. Figure 3-8 As shown, the air intake channels include air intake channel one 11 and air intake channel two 12. Compressed air enters the air intake end of the molecular sieve cylinder through air intake port 4 → air intake channel one 11 → air intake channel two 12 → air outlet channel 13 → air outlet port 8. The exhaust channels include exhaust channel one 9 and exhaust channel two 10. Exhaust channel two 10 is provided with three channels (e.g., ...). Figure 7 As shown in the figure, nitrogen gas in the molecular sieve cylinder passes through the inlet end of the molecular sieve cylinder → outlet 8 → outlet channel 13 → exhaust channel one 9 → exhaust channel two 10 → exhaust silencer chamber 6, and is discharged from the first exhaust port 5 and the second exhaust port 7 respectively.
[0043] Figure 7 and Figure 8 In the figure, the open ends of the lower part of exhaust passage 19 and intake passage 212 are process holes, not gas flow passages. They will be blocked in actual use and are not shown in the figure.
[0044] The intake channel, exhaust channel 13, and exhaust channel are integrated into the valve seat. The connection between the intake channel and the exhaust channel 13 is controlled by a two-position three-way solenoid valve, and / or the connection between the exhaust channel 13 and the exhaust channel is controlled, which simplifies the pipeline connection. Three exhaust channels 10 are set up to disperse the airflow before entering the exhaust silencer chamber 6, reduce the airflow pressure, reduce the airflow velocity, and ensure the silencer effect.
[0045] The air intake valve with exhaust silencing function disclosed in this embodiment is installed in the oxygen generator. In order to make reasonable use of the internal space of the oxygen generator and make the structure of the oxygen generator more compact, the valve cover 2 is provided with an arc-shaped surface on the side away from the valve seat 1 for fitting the molecular sieve cylinder in the oxygen generator.
[0046] The above embodiments are merely exemplary embodiments of this utility model and are not intended to limit this utility model. Those skilled in the art can make various modifications or equivalent substitutions to this utility model within its substance and protection scope, and such modifications or equivalent substitutions should also be considered to fall within the protection scope of this utility model.
Claims
1. An intake valve having an exhaust sound muffling function, characterized by comprising: The utility model relates to a valve for oxygen generator, which comprises: a valve seat with an air inlet and an air outlet; a valve cover with an exhaust muffling cavity; an air inlet channel, an air outlet channel and an exhaust channel, all of which are arranged in the valve seat and communicate with the air inlet, the air outlet and the exhaust muffling cavity respectively; a switch assembly for controlling the communication between the air inlet channel and the air outlet channel, or the communication between the air outlet channel and the exhaust channel; the exhaust end of the exhaust channel is arranged between the valve seat and the valve cover, the exhaust muffling cavity comprises a first cavity and a second cavity which communicate with each other, and the first cavity and the second cavity correspond to a first exhaust port and a second exhaust port with different diameters respectively, and the exhaust end communicates with the first cavity and / or the second cavity.
2. The intake valve having an exhaust sound deadening function according to claim 1, characterized by, The valve seat and the valve cover are detachably connected.
3. The intake valve having an exhaust sound deadening function according to claim 1, characterized by, The first cavity is provided with a filling piece or a muffling piece for changing the size of the exhaust port.
4. The intake valve having an exhaust sound deadening function according to claim 1, characterized by, The second cavity is provided with a filling piece or a muffling piece for separating the internal space of the second cavity and making the separated internal space communicate with each other.
5. The intake valve having an exhaust sound deadening function according to claim 1, characterized by, The volume of the first cavity is smaller than that of the second cavity, and the diameter of the first exhaust port is smaller than that of the second exhaust port.
6. The intake valve having an exhaust sound deadening function according to claim 5, characterized by, The second cavity comprises a third cavity and a fourth cavity, the first cavity, the third cavity and the fourth cavity communicate with each other through holes, and the fourth cavity communicates with the second exhaust port.
7. The intake valve having an exhaust sound deadening function according to claim 6, characterized by, The exhaust end of the exhaust channel communicates with the third cavity, and the volume of the third cavity is greater than that of the first cavity and the fourth cavity respectively.
8. The intake valve having an exhaust sound deadening function according to claim 7, characterized by, The first cavity is provided with a filling piece for changing the size of the first exhaust port, and the third cavity is provided with a muffling piece, and the volume of the muffling piece is smaller than that of the third cavity.
9. The intake valve having an exhaust sound deadening function according to claim 1, characterized by, The second exhaust port extends into the compressor cavity of the oxygen generator.
10. The intake valve having an exhaust sound deadening function according to claim 1, characterized by, The side of the valve cover away from the valve seat is provided with an arc surface for fitting the molecular sieve cylinder in the oxygen generator.