Double-end piston positive and negative pressure pump for oxygen generator

Abstract

The utility model provides a double-end piston positive and negative pressure pump for an oxygen generator. The double-end piston positive and negative pressure pump comprises a shell, a motor, a positive pressure cylinder and a negative pressure cylinder, the motor, the positive pressure cylinder and the negative pressure cylinder are all mounted on the shell; the positive pressure cylinder and the negative pressure cylinder are arranged at an interval, and the motor is used for driving the positive pressure cylinder and the negative pressure cylinder. The double-end piston positive and negative pressure pump for the oxygen generator is simple in overall structure, can simply and quickly realize a positive and negative pressure mode, is more convenient in processing and production process, and is low in overall production and assembly cost. In the using process, due to the fact that the double-cylinder mode is adopted, when the double-cylinder mode is applied to the oxygen generator, the double-cylinder mode has the advantages of being smaller in mass and size, the whole oxygen generator can be lighter in overall mass and smaller in size, and compared with a four-cylinder mode commonly used in the market, the double-cylinder mode can well reduce the using power of the whole oxygen generator, and the service life of the whole oxygen generator is prolonged. And thus, the endurance time of the whole oxygen generator is prolonged.

Description

Technical Field

[0001] The utility model relates to the technical field of oxygen production equipment, in particular to a double-head piston positive and negative pressure pump for an oxygen generator. Background Art

[0002] Oil-free piston air compressor is a type of reciprocating air compressor. The air is compressed mainly by the reciprocating motion of the piston in the cylinder. It is widely used in medical equipment, oxygen production equipment, fuel cells and other fields.

[0003] When used in oxygen production equipment, positive and negative pressure pumps are used, that is, vacuum pressure swing adsorption (VPSA) technology is used. While nitrogen and oxygen are separated in the adsorption tower, the separated nitrogen is extracted by negative pressure and released into the air.

[0004] At present, under the same conditions, the existing positive and negative pressure pumps usually adopt a four-cylinder form, which is larger in size and mass, and ultimately increases the overall volume and mass of the oxygen concentrator. In addition, due to the four-cylinder form, the overall structure is complex. When connected with an external oxygen concentrator, the installation and arrangement of the inlet and outlet pipes are highly complex, and the overall structure is not beautiful. Utility Model Content

[0005] In order to solve the above problems, the utility model adopts the following technical solutions: a double-head piston positive and negative pressure pump for an oxygen concentrator, comprising: a housing, a motor, a positive pressure cylinder and a negative pressure cylinder;

[0006] The motor, the positive pressure cylinder and the negative pressure cylinder are all mounted on the housing;

[0007] The positive-pressure cylinder and the negative-pressure cylinder are spaced apart from each other, and the motor is used to drive the positive-pressure cylinder and the negative-pressure cylinder.

[0008] Furthermore, the positive-pressure cylinder and the negative-pressure cylinder are both piston cylinders.

[0009] Furthermore, the motor is used to drive the piston in the positive-pressure cylinder to move and to drive the piston in the negative-pressure cylinder to move, thereby compressing the air.

[0010] Furthermore, the positive pressure cylinder is provided with a positive pressure cylinder end cover, and the positive pressure cylinder end cover is provided with a positive pressure air inlet and a positive pressure air outlet, and the positive pressure air inlet and the positive pressure air outlet are both connected to the interior of the positive pressure cylinder.

[0011] Furthermore, a negative pressure cylinder end cover is provided on the negative pressure cylinder, and a negative pressure air inlet and a negative pressure air outlet are opened on the negative pressure cylinder end cover, and the negative pressure air inlet and the negative pressure air outlet are both connected to the interior of the negative pressure cylinder.

[0012] Furthermore, the negative pressure air inlet is used to be connected to a nitrogen exhaust port of an external oxygen generator.

[0013] Furthermore, a positive pressure cylinder end cover is provided at one end of the positive pressure cylinder, and a positive pressure air inlet and a positive pressure air outlet are opened at the other end. The positive pressure cylinder end cover is used to cover the positive pressure cylinder, and the positive pressure air inlet and the positive pressure air outlet are both connected to the interior of the positive pressure cylinder.

[0014] Furthermore, a negative pressure cylinder end cover is provided at one end of the negative pressure cylinder, and a negative pressure air inlet and a negative pressure air outlet are opened at the other end. The negative pressure cylinder end cover is used to cover the negative pressure cylinder, and the negative pressure air inlet and the negative pressure air outlet are both connected to the interior of the negative pressure cylinder.

[0015] The beneficial effects of the utility model are as follows: using this double-head piston positive and negative pressure pump for an oxygen concentrator, the overall structure is simple, and the positive and negative pressures can be realized simply and quickly, the processing and production process is more convenient, and the overall production and assembly cost is low. During use, due to the use of a double-cylinder form, when applied to an oxygen concentrator, it has the advantages of smaller mass and volume, which can make the entire oxygen concentrator lighter and smaller in volume. Compared with the four-cylinder form commonly used on the market, the double-cylinder form can well reduce the power consumption of the entire oxygen concentrator, thereby increasing the life of the entire oxygen concentrator, and ensuring that the overall structure will be more compact, and all air inlet and outlet pipes can be well centrally arranged, so that the overall structure is neat and orderly. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] The accompanying drawings further illustrate the present invention, but the embodiments in the accompanying drawings do not constitute any limitation to the present invention.

[0017] Figure 1 A schematic diagram of the overall structure of a double-headed piston positive and negative pressure pump for an oxygen concentrator provided in one embodiment;

[0018] Figure 2 A schematic diagram of one direction of a double-head piston positive and negative pressure pump for an oxygen concentrator provided by an embodiment;

[0019] Figure 3 A schematic diagram of another direction of a double-headed piston positive and negative pressure pump for an oxygen concentrator provided by an embodiment. DETAILED DESCRIPTION

[0020] The following will further describe the technical solution of the utility model in conjunction with the drawings of the embodiments of the utility model, and the utility model is not limited to the following specific implementation methods. It should be noted that the embodiments of the utility model and the features in the embodiments can be combined with each other without conflict.

[0021] like Figures 1 to 3As shown, a double-headed piston positive and negative pressure pump for an oxygen concentrator includes: a housing 100, a motor 200, a positive pressure cylinder 300 and a negative pressure cylinder 400; the motor 200, the positive pressure cylinder 300 and the negative pressure cylinder 400 are all installed on the housing 100; the positive pressure cylinder 300 and the negative pressure cylinder 400 are arranged at intervals, and the motor 200 is used to drive the positive pressure cylinder 300 and the negative pressure cylinder 400.

[0022] Specifically, the positive-pressure cylinder 300 and the negative-pressure cylinder 400 are both piston cylinders, and the motor 200 is used to drive the piston in the positive-pressure cylinder 300 to move and to drive the piston in the negative-pressure cylinder 400 to move, thereby compressing the air.

[0023] In the above embodiment, the positive pressure cylinder 300 is provided with a positive pressure cylinder end cover 500, and the positive pressure cylinder end cover 500 is provided with a positive pressure air inlet 510 and a positive pressure air outlet 520, and the positive pressure air inlet 510 and the positive pressure air outlet 520 are both communicated with the interior of the positive pressure cylinder 300. The negative pressure cylinder 400 is provided with a negative pressure cylinder end cover 600, and the negative pressure cylinder end cover 600 is provided with a negative pressure air inlet 610 and a negative pressure air outlet 620, and the negative pressure air inlet 610 and the negative pressure air outlet 620 are both communicated with the interior of the negative pressure cylinder 400.

[0024] That is to say, the double-headed piston positive and negative pressure pump for the oxygen concentrator adopts the form of a double-headed piston, with the negative pressure cylinder 400 on the left and the positive pressure cylinder 300 on the right. When in use, when it is applied to the oxygen concentrator, the motor 200 drives the piston in the positive pressure cylinder 300 to compress the air, and also drives the piston in the negative pressure cylinder 400 to compress the air. The positive pressure air inlet 510 of the positive pressure cylinder 300 is connected to the external atmosphere, that is, the atmosphere enters the positive pressure cylinder 300 through the positive pressure air inlet 510, and then is compressed into high-pressure air by the positive pressure cylinder 300 and discharged through the positive pressure air outlet 520. The high-pressure air discharged from the positive pressure air outlet 520 enters the air inlet seat and connecting pipe of the oxygen concentrator and is input into the molecular sieve tower. Furthermore, the negative pressure air inlet 610 on the negative pressure cylinder 400 is connected to the nitrogen exhaust port on the oxygen generator, that is, it plays the role of sucking out the nitrogen sieved out by the high-pressure air in the molecular sieve tower, that is, sucking out the nitrogen adsorbed in the high-pressure air, and discharging the sucked nitrogen through the negative pressure air outlet 620.

[0025] That is to say, the use of this double-head piston positive and negative pressure pump for oxygen concentrators has a simple overall structure, and can simply and quickly realize positive and negative pressures. The processing and production process is more convenient, and the overall production and assembly cost is low. During use, due to the use of a double-cylinder form, when applied to an oxygen concentrator, it has the advantages of smaller mass and volume, which can make the entire oxygen concentrator lighter and smaller in volume. Compared with the four-cylinder form commonly used on the market, the double-cylinder form can well reduce the power consumption of the entire oxygen concentrator, thereby increasing the battery life of the entire oxygen concentrator.

[0026] When using this double-head piston positive and negative pressure pump for an oxygen concentrator, the positive pressure air inlet 510 and the positive pressure air outlet 520 are opened on one side of the positive pressure cylinder 300, and the air inlet and air outlet pipelines can be arranged symmetrically, making the overall design simpler and ensuring that the overall structure will be more compact, so that the overall mass and volume can be smaller. Similarly, the negative pressure air inlet 610 and the negative pressure air outlet 620 are opened on one side of the negative pressure cylinder 400, and the air inlet and air outlet pipelines can be arranged symmetrically, making the overall design simpler and ensuring that the overall structure will be more compact. Therefore, when the entire positive and negative pressure pump with this design is installed on a portable oxygen concentrator, the mass of the entire oxygen concentrator can be reduced, and the overall volume can be designed to be smaller and more convenient to carry. It is worth mentioning that by opening the positive pressure air inlet 510, the positive pressure air outlet 520, the negative pressure air inlet 610 and the negative pressure air outlet 620 on the same side, all the air inlet and outlet pipes can be centrally arranged, making the overall structure neat and orderly.

[0027] In one embodiment, a positive pressure cylinder end cap is provided at one end of the positive pressure cylinder, and a positive pressure air inlet and a positive pressure air outlet are provided at the other end, the positive pressure cylinder end cap is used to cover the positive pressure cylinder, and the positive pressure air inlet and the positive pressure air outlet are both connected to the interior of the positive pressure cylinder. A negative pressure cylinder end cap is provided at one end of the negative pressure cylinder, and a negative pressure air inlet and a negative pressure air outlet are provided at the other end, the negative pressure cylinder end cap is used to cover the negative pressure cylinder, and the negative pressure air inlet and the negative pressure air outlet are both connected to the interior of the negative pressure cylinder. When using this double-head piston positive and negative pressure pump for the oxygen concentrator, the positive pressure air inlet and the positive pressure air outlet are opened on one side of the positive pressure cylinder, and the air inlet and air outlet pipelines can be arranged symmetrically, making the overall design simpler and ensuring that the overall structure will be more compact, so that the overall mass and volume can be smaller. Similarly, the negative pressure air inlet and the negative pressure air outlet are opened on one side of the negative pressure cylinder, and the air inlet and air outlet pipelines can also be arranged symmetrically, making the overall design simpler and ensuring that the overall structure will be more compact.

[0028] In summary, the above-mentioned implementation modes are not limitative implementation modes of the present invention, and any modification or equivalent deformation made by technicians in this field on the basis of the essential content of the present invention is within the technical scope of the present invention.

Claims

1. A double-head piston positive and negative pressure pump for an oxygen concentrator, It is characterized in that include: Housing, motor, positive pressure cylinder and negative pressure cylinder; The motor, the positive pressure cylinder and the negative pressure cylinder are all mounted on the housing; The positive-pressure cylinder and the negative-pressure cylinder are spaced apart from each other, and the motor is used to drive the positive-pressure cylinder and the negative-pressure cylinder.

2. The double-head piston positive and negative pressure pump for an oxygen concentrator according to claim 1, Features: The positive-pressure cylinder and the negative-pressure cylinder are both piston cylinders.

3. The double-head piston positive and negative pressure pump for an oxygen concentrator according to claim 2, Features: The motor is used to drive the piston in the positive-pressure cylinder to move and to drive the piston in the negative-pressure cylinder to move, thereby compressing the air.

4. The double-head piston positive and negative pressure pump for an oxygen concentrator according to claim 1, Features: The positive pressure cylinder is provided with a positive pressure cylinder end cover, and the positive pressure cylinder end cover is provided with a positive pressure air inlet and a positive pressure air outlet, and the positive pressure air inlet and the positive pressure air outlet are both communicated with the interior of the positive pressure cylinder.

5. The double-head piston positive and negative pressure pump for an oxygen concentrator according to claim 4, Features: The negative pressure cylinder is provided with a negative pressure cylinder end cover, and the negative pressure cylinder end cover is provided with a negative pressure air inlet and a negative pressure air outlet, and the negative pressure air inlet and the negative pressure air outlet are both communicated with the interior of the negative pressure cylinder.

6. The double-head piston positive and negative pressure pump for an oxygen concentrator according to claim 5, Features: The negative pressure air inlet is used to be connected to a nitrogen exhaust port of an external oxygen generator.

7. The double-head piston positive and negative pressure pump for an oxygen concentrator according to claim 1, Features: A positive pressure cylinder end cover is provided at one end of the positive pressure cylinder, and a positive pressure air inlet and a positive pressure air outlet are opened at the other end. The positive pressure cylinder end cover is used to cover the positive pressure cylinder, and the positive pressure air inlet and the positive pressure air outlet are both connected to the interior of the positive pressure cylinder.

8. The double-head piston positive and negative pressure pump for an oxygen concentrator according to claim 7, Features: A negative pressure cylinder end cover is provided at one end of the negative pressure cylinder, and a negative pressure air inlet and a negative pressure air outlet are opened at the other end. The negative pressure cylinder end cover is used to cover the negative pressure cylinder, and the negative pressure air inlet and the negative pressure air outlet are both connected to the interior of the negative pressure cylinder.

Images