Light-tone direct-current variable-frequency oxygen generator

Abstract

The invention discloses a light-tone direct-current variable-frequency oxygen generator, and belongs to the technical field of oxygen generators, the light-tone direct-current variable-frequency oxygen generator comprises a machine shell, a machine cover plate is arranged in the machine shell, the machine cover plate wraps an internal direct-current variable-frequency compressor, and a supporting metal plate is arranged below the machine cover plate; the upper surface of the supporting metal plate is upwards connected with a direct-current inverter compressor through spring damping supports on the periphery, air inlet through grooves are formed in the corresponding positions of the surface of the machine cover plate and the surface of the machine shell which are located on the same side, and the upper surface of the machine cover plate is connected with an arch-shaped air channel groove through a U-shaped connecting plate with a threaded hole. A circulating fan is installed in the arch-shaped air duct groove, an air inlet of the arch-shaped air duct groove is located in the lowermost end, and the inner side face of the air inlet corresponds to the inner area of the hood plate. According to the direct-current variable-frequency oxygen generator, main source parts for generating noise of the oxygen generator are processed, the internal structure and the operation mode of the parts are adjusted, and finally the noise of the product is reduced.

Description

Technical Field

[0001] The present invention relates to the technical field of oxygen concentrators, and in particular to a low-noise direct current variable frequency oxygen concentrator. Background Art

[0002] Existing oxygen concentrators use the adsorption performance of molecular sieves, and through physical principles, use large-displacement oil-free compressors as power to separate nitrogen and oxygen in the air, and ultimately obtain high-concentration oxygen. This type of oxygen concentrator produces oxygen quickly and has a high oxygen concentration, making it suitable for oxygen therapy and oxygen health care for all kinds of people.

[0003] In actual use, since the oxygen concentrator is close to the user, its own noise control is particularly critical and directly affects the user experience. The main noise sources of existing oxygen concentrators include: the noise generated when the compressor is working, the switching sound of the diaphragm valve, the nitrogen exhaust sound of the molecular sieve component, and the noise of the internal cooling fan. At present, all noises cannot be fundamentally eliminated. Therefore, how to reduce noise is a common research topic in the industry. The mainstream solution is to pass nitrogen into the nitrogen exhaust silencer to reduce noise and silence it before discharging it. In order to improve the noise reduction effect when exhausting nitrogen, it is usually possible to arrange multiple nitrogen exhaust silencers for noise reduction. However, due to the limitation of the internal installation space of the oxygen concentrator and considering the resonance phenomenon, multiple nitrogen exhaust silencers are arranged inside the oxygen concentrator shell to reduce noise and silence nitrogen when exhausting. This is easy to conflict with the original structural layout and generate new resonance noise. Summary of the invention

[0004] In response to the above problems, the present application provides a low-noise DC variable frequency oxygen concentrator, which processes the main source components of the noise generated by the oxygen concentrator, adjusts the internal structure and the operation mode of the components, and ultimately achieves the result of reducing the product noise.

[0005] In order to achieve the above object, the technical solution adopted by the present invention is as follows:

[0006] A low-noise DC variable frequency oxygen concentrator comprises a casing, wherein a hood plate is provided inside the casing, wherein the hood plate wraps the internal DC variable frequency compressor and a supporting sheet metal is provided below the hood plate, wherein the upper surface of the supporting sheet metal is upwardly connected to the DC variable frequency compressor via spring shock-absorbing supports on all sides, wherein the hood plate on the same side and the corresponding positions on the casing surface are provided with air inlet grooves, wherein the upper surface of the hood plate is connected to an arched air duct groove via a U-shaped connecting plate with threaded holes, wherein a circulating fan is installed inside the arched air duct groove, wherein the air inlet of the arched air duct groove is located at the lowermost end and the inner side surface of the air inlet corresponds to the internal area of ​​the hood plate, and the air outlet of the arched air duct groove is embedded in the casing and extends outward.

[0007] As a further optimization of this solution, a silencer base is provided at the bottom of the casing, a diaphragm valve is installed in the area below the supporting sheet metal inside the silencer base, the molecular sieve assembly inside the casing is assembled inverted and the air inlet of the molecular sieve assembly is located inside the silencer base, and the air inlet is connected to the corresponding interface of the diaphragm valve through a pipeline.

[0008] As a further optimization of this solution, an air intake muffler is provided on the air intake pipe of the DC variable frequency compressor.

[0009] As a further optimization of this solution, the air outlet pipe of the DC variable frequency compressor is connected to the condenser.

[0010] As a further optimization of this solution, the condenser is connected to the corresponding interface of the diaphragm valve through a pipeline.

[0011] As a further optimization of this solution, the molecular sieve assembly is connected to the oxygen outlet through a pipeline.

[0012] As a further optimization of this solution, a control circuit panel is installed above the hood plate.

[0013] As a further optimization of this solution, the arcuate air duct groove is mounted on the upper end of the inverted assembled molecular sieve assembly.

[0014] In summary, the technical effects and advantages of the present invention are as follows:

[0015] 1. Fan operation mode: The fan extracts the heat inside the machine to the outside of the machine, and the normal temperature air outside enters the machine to absorb heat and heat up, and then is extracted by the fan, thus circulating. Since the fan outlet is smooth and the wind force is less obstructed, the noise generated will be effectively reduced while ensuring heat dissipation.

[0016] 2. Assembly of molecular sieve components: The main operating noise of the machine comes from the switching sound of the compressor and diaphragm valve and the sound of nitrogen exhaust. This product installs the diaphragm valve inside the base and close to the bottom of the compressor, using the compressor and diaphragm valve to offset part of the sound waves; and because the internal space of the base is large, it is easy to adjust the silencer structure, which can effectively suppress the spread of noise and achieve the result of reducing noise.

[0017] 3. Compressor operation characteristics: A DC variable frequency compressor is used to provide the air source, and its noise frequency is relatively stable, which is convenient for silencing and noise reduction. In addition, the oxygen concentration is detected and fed back through an oxygen concentration sensor to control the compressor output power and speed, achieving variable frequency and energy-saving effects. The compressor can still maintain oxygen concentration standards in a low-pressure plateau environment, thereby improving customer satisfaction. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present application. For those skilled in the art, other drawings can be obtained based on these drawings without paying any creative work.

[0019] Figure 1 The figure is a schematic diagram of the bow-shaped air duct structure of the oxygen concentrator of the present invention (part of the casing and the cover plate are removed).

[0020] Figure 2 This is a schematic diagram of the air inlet slot structure of the present invention (part of the casing and the hood plate are removed).

[0021] Figure 3 This is a schematic diagram of the internal structure of the muffler base of the present invention (part of the housing and the hood plate are removed).

[0022] In the figure: 1. hood plate; 2. bow-shaped air duct groove; 3. air inlet; 4. air outlet; 5. circulation fan; 6. DC variable frequency compressor; 7. air inlet groove; 8. molecular sieve assembly; 9. casing; 10. air intake silencer; 11. condenser; 12. supporting sheet metal; 13. diaphragm valve; 14. silencer base. DETAILED DESCRIPTION

[0023] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0024] In order to solve the existing problem that due to the limitation of the internal installation space of the oxygen concentrator and the resonance phenomenon, multiple nitrogen exhaust silencers are arranged inside the oxygen concentrator shell to reduce the noise when exhausting nitrogen, which is easy to conflict with the original structural layout and generate new resonance noise;

[0025] like Figures 1 to 3As shown, the present application includes a casing 9, a hood plate 1 is provided inside the casing 9, the hood plate 1 wraps the DC variable frequency compressor 6 inside and a support sheet metal 12 is provided below the hood plate 1, the upper surface of the support sheet metal 12 is upwardly connected to the DC variable frequency compressor 6 through spring shock-absorbing supports on all sides, wherein the hood plate 1 located on the same side and the corresponding positions on the surface of the casing 9 are provided with air inlet grooves 7, the upper surface of the hood plate 1 is connected to an arched air duct groove 2 through a U-shaped connecting plate with threaded holes, a circulating fan 5 is installed inside the arched air duct groove 2, the air inlet 3 of the arched air duct groove 2 is located at the lowermost end and the inner side of the air inlet 3 corresponds to the internal area of ​​the hood plate 1, and the air outlet 4 of the arched air duct groove 2 is embedded in the casing 9 and extends outward;

[0026] Specifically, the external cold air enters the internal area of ​​the hood plate 1 wrapping the DC variable frequency compressor 6 through the air inlet slot 7, taking away the working heat of the DC variable frequency compressor 6, and the hot air is drawn out from the air inlet 3 of the bow-shaped air duct slot 2 on the other side, passes through the bow-shaped air duct slot 2, and is blown to the outside of the machine through the air outlet 4 by the circulating fan 5, thereby achieving the purpose of cooling. In this cycle, since the fan air outlet is smooth and the wind force is less obstructed, the noise generated will be effectively reduced while ensuring heat dissipation.

[0027] A silencer base 14 is provided at the bottom of the casing 9, and a diaphragm valve 13 is installed in the area below the support sheet metal 12 inside the silencer base 14. The molecular sieve assembly 8 inside the casing 9 is inverted and the air inlet of the molecular sieve assembly 8 is located inside the silencer base 14, and the air inlet is connected to the corresponding interface of the diaphragm valve 13 through a pipeline. An air intake muffler 10 is provided on the air intake pipeline of the DC variable frequency compressor 6, and the air outlet pipeline of the DC variable frequency compressor 6 is connected to the condenser 11, and the condenser 11 is connected to the corresponding interface of the diaphragm valve 13 through a pipeline, and the molecular sieve assembly 8 is connected to the oxygen outlet through a pipeline;

[0028] Specifically, the molecular sieve assembly 8 is assembled inverted, with its air intake direction and the diaphragm valve 13 below the supporting sheet metal 12. By adjusting the molecular sieve assembly 8 and the diaphragm valve 13 to be assembled at the bottom of the machine base, and using the supporting sheet metal 12 for sound insulation, the purpose of silencing is achieved together, and the DC variable frequency compressor 6 and the diaphragm valve 13 produce partially offset sound waves; and the silencing base 14 has a large internal space, which is convenient for adjusting the silencing structure, and can effectively suppress the propagation of noise, thereby achieving the result of reducing noise.

[0029] The DC variable frequency compressor 6 is mainly used to compress gas to provide a gas source. The main gas operation path is that the air enters the DC variable frequency compressor 6 through the air intake silencer 10, and the air is discharged from the other end of the DC variable frequency compressor 6 to the condenser 11, and then reaches the diaphragm valve 13 from the condenser 11, and then to the molecular sieve component 8. Finally, oxygen comes out from the oxygen outlet. The control circuit panel is used to control the coordinated operation of various components inside the oxygen generator.

[0030] When the oxygen production of this low-noise DC variable frequency oxygen generator is set to different gears, the corresponding power consumption and noise of the DC variable frequency compressor 6 will also be different; it can be adjusted according to the customer's needs to meet the needs of customers at different stages while achieving energy-saving effects. The power consumption and noise of each gear of the DC variable frequency compressor 6 are relatively stable, which is convenient for noise control. The noise frequency is relatively stable and convenient for silencing and noise reduction processing. In addition, the oxygen concentration is detected and fed back by the oxygen concentration sensor to control the compressor output power and speed to achieve frequency conversion and energy-saving effects. The compressor can still maintain oxygen concentration standards in a low-pressure plateau environment, thereby improving customer satisfaction.

[0031] Finally, it should be noted that the above is only a preferred embodiment of the present invention and is not intended to limit the present invention. Although the present invention has been described in detail with reference to the aforementioned embodiments, it is still possible for those skilled in the art to modify the technical solutions described in the aforementioned embodiments, or to make equivalent substitutions for some of the technical features therein. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A low-noise DC variable frequency oxygen concentrator, comprising a housing (9), wherein a cover plate (1) is provided inside the housing (9), characterized in that: The hood plate (1) wraps the internal DC variable frequency compressor (6) and a supporting sheet metal (12) is provided below the hood plate (1). The upper surface of the supporting sheet metal (12) is upwardly connected to the DC variable frequency compressor (6) through spring shock-absorbing supports on all sides. The hood plate (1) and the housing (9) on the same side are provided with air inlet grooves (7) at corresponding positions. The upper surface of the hood plate (1) is connected to an arched air duct groove (2) through a U-shaped connecting plate with threaded holes. A circulating fan (5) is installed inside the arched air duct groove (2). The air inlet (3) of the arched air duct groove (2) is located at the lower end and the inner side of the air inlet (3) corresponds to the internal area of ​​the hood plate (1). The air outlet (4) of the arched air duct groove (2) is embedded in the housing (9) and extends to the outside.

2. According to claim 1, a low-noise DC variable frequency oxygen concentrator is characterized in that: A silencer base (14) is provided at the bottom of the casing (9), a diaphragm valve (13) is installed in the silencer base (14) in an area below the supporting sheet metal (12), the molecular sieve assembly (8) inside the casing (9) is invertedly assembled and the air inlet of the molecular sieve assembly (8) is located inside the silencer base (14), and the air inlet is connected to the corresponding interface of the diaphragm valve (13) through a pipeline.

3. A low-noise DC variable frequency oxygen concentrator according to claim 1, characterized in that: An air intake muffler (10) is provided on the air intake pipe of the DC variable frequency compressor (6).

4. A low-noise DC variable frequency oxygen concentrator according to claim 2, characterized in that: The air outlet pipe of the DC variable frequency compressor (6) is connected to the condenser (11).

5. A low-noise DC variable frequency oxygen concentrator according to claim 4, characterized in that: The condenser (11) is connected to the corresponding interface of the diaphragm valve (13) through a pipeline.

6. A low-noise DC frequency conversion oxygen concentrator according to claim 5, characterized in that: The molecular sieve assembly (8) is connected to the oxygen outlet through a pipeline.

7. The low-noise DC variable frequency oxygen concentrator according to claim 1 is characterized by: A control circuit panel is installed above the hood plate (1).

8. The low-noise DC variable frequency oxygen concentrator according to claim 2 is characterized by: The arcuate air duct groove (2) is mounted on the upper end of the inverted molecular sieve assembly (8).

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