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 motor, a positive pressure cylinder and a negative pressure cylinder, the motor is arranged on one side of the negative pressure cylinder, the positive pressure cylinder and the negative pressure cylinder are correspondingly arranged, 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. At the same time, the multi-cylinder form will increase the complexity of its assembly and make the production process more cumbersome. 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 motor, a positive pressure cylinder and a negative pressure cylinder;

[0006] The motor is arranged at one side of the negative pressure cylinder, the positive pressure cylinder and the negative pressure cylinder are arranged correspondingly, and the motor is used to drive the positive pressure cylinder and the negative pressure cylinder.

[0007] Furthermore, the positive-pressure cylinder and the negative-pressure cylinder are both piston cylinders.

[0008] 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.

[0009] Furthermore, a positive pressure cylinder end cover is provided at one end of the positive pressure cylinder, and a positive pressure air inlet is opened at the other end, a positive pressure exhaust port is opened on the positive pressure cylinder end cover, and the positive pressure air inlet and the positive pressure exhaust port are both connected to the interior of the positive pressure cylinder.

[0010] Furthermore, a negative pressure cylinder end cover is provided at one end of the negative pressure cylinder, and a negative pressure air inlet is opened on one side of the negative pressure cylinder, and a negative pressure exhaust port is opened on the negative pressure cylinder end cover, and the negative pressure air inlet and the negative pressure exhaust port are both connected to the interior of the negative pressure cylinder.

[0011] Further, the positive pressure air inlet is located on one side of the positive pressure cylinder, the positive pressure exhaust port is located on the other side of the positive pressure cylinder, the negative pressure air inlet is located on one side of the negative pressure cylinder, and the negative pressure exhaust port is located on the other side of the negative pressure cylinder.

[0012] The beneficial effects of the utility model are as follows: the double-head piston positive and negative pressure pump for the oxygen concentrator has a simple overall structure, can realize positive and negative pressure in a simple and fast manner, is more convenient to process and has a low overall production and assembly cost. 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. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] The accompanying drawings further illustrate the present invention, but the embodiments in the accompanying drawings do not constitute any limitation to the present invention.

[0014] Figure 1 This is a schematic diagram of the overall structure of a double-head piston positive and negative pressure pump for an oxygen concentrator provided in one embodiment;

[0015] 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;

[0016] Figure 3 A schematic diagram of another direction of a double-head piston positive and negative pressure pump for an oxygen concentrator provided by an embodiment;

[0017] Figure 4 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

[0018] 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.

[0019] like Figures 1 to 4 As shown, a double-head piston positive and negative pressure pump for an oxygen concentrator includes: a motor 100, a positive pressure cylinder 200 and a negative pressure cylinder 300; the motor 100 is arranged on one side of the negative pressure cylinder 300, the positive pressure cylinder 200 and the negative pressure cylinder 300 are arranged correspondingly, and the motor 100 is used to drive the positive pressure cylinder 200 and the negative pressure cylinder 300.

[0020] Specifically, the positive-pressure cylinder 200 and the negative-pressure cylinder 300 are both piston cylinders, and the motor 100 is used to drive the piston in the positive-pressure cylinder 200 to move and to drive the piston in the negative-pressure cylinder 300 to move, thereby compressing the air.

[0021] In the above embodiment, a positive pressure cylinder end cover 210 is provided at one end of the positive pressure cylinder 200, and a positive pressure air inlet 220 is provided at the other end, a positive pressure air outlet 230 is provided on the positive pressure cylinder end cover 210, and both the positive pressure air inlet 220 and the positive pressure air outlet 230 are communicated with the interior of the positive pressure cylinder 200. A negative pressure cylinder end cover 310 is provided at one end of the negative pressure cylinder 300, and a negative pressure air inlet 320 is provided on one side of the negative pressure cylinder 300, a negative pressure air outlet 330 is provided on the negative pressure cylinder end cover 310, and both the negative pressure air inlet 320 and the negative pressure air outlet 330 are communicated with the interior of the negative pressure cylinder 300. That is, the positive pressure air inlet 220 is located on one side of the positive pressure cylinder 200 , the positive pressure exhaust port 230 is located on the other side of the positive pressure cylinder 200 , the negative pressure air inlet 320 is located on one side of the negative pressure cylinder 300 , and the negative pressure exhaust port 330 is located on the other side of the negative pressure cylinder 300 .

[0022] 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 300 on the left and the positive pressure cylinder 200 on the right. When in use, when it is applied to the oxygen concentrator, the motor 100 drives the piston in the positive pressure cylinder 200 to compress the air, and also drives the piston in the negative pressure cylinder 300 to compress the air. The positive pressure air inlet 220 of the positive pressure cylinder 200 is connected to the external atmosphere, that is, the atmosphere enters the positive pressure cylinder 200 through the positive pressure air inlet 220, and then is compressed into high-pressure air by the positive pressure cylinder 200 and discharged through the positive pressure exhaust port 230. The high-pressure air discharged from the positive pressure exhaust port 230 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 320 on the negative pressure cylinder 300 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 exhaust port 330.

[0023] 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.

[0024] In one embodiment, since the positive and negative pressure pumps are used for an oxygen concentrator, the positive pressure air inlet 220 of the positive pressure cylinder 200 is arranged on one side, and the positive pressure exhaust port 230 is arranged on the other side, and the negative pressure air inlet 320 of the negative pressure cylinder 300 is arranged on one side, and the negative pressure exhaust port 330 is arranged on the other side. This arrangement can flexibly change the positions of the air inlet and the air outlet according to the structural design of the oxygen concentrator, so that the internal pipeline of the oxygen concentrator is simpler and more beautiful, the complexity of production is reduced, and working hours are saved; that is, as long as the positive pressure air inlet and the positive pressure exhaust port of the positive pressure cylinder are arranged on both sides of the positive pressure cylinder, and the negative pressure air inlet and the negative pressure exhaust port of the negative pressure cylinder are arranged on both sides of the negative pressure cylinder, the above-mentioned effect can be achieved. As for the specific positions where the positive pressure air inlet, positive pressure exhaust port, negative pressure air inlet and negative pressure exhaust port should be opened, there is no restriction in this embodiment. At the same time, by distributing the positive pressure air inlet 220 and the positive pressure exhaust port 230 on both sides of the positive pressure cylinder 200, and distributing the negative pressure air inlet 320 and the negative pressure exhaust port 330 on both sides of the negative pressure cylinder 300, the mutual interference between the inlet and outlet air flows can be effectively avoided, and the noise generated by aerodynamic turbulence can be reduced; when connected to an external oxygen generator for use, the negative pressure air inlet 320 of the negative pressure cylinder 300 sucks out the nitrogen in the adsorption tower and then discharges it from the negative pressure exhaust port 330, increasing the distance between the negative pressure exhaust port 330 and the positive pressure air inlet 220, which can ensure that the oxygen content of the gas under positive pressure compression is consistent with the atmosphere, and ultimately increase the oxygen concentration of the oxygen generator. It is worth mentioning that by distributing the positive pressure air inlet 220 and the positive pressure exhaust port 230 on both sides of the positive pressure cylinder 200, and distributing the negative pressure air inlet 320 and the negative pressure exhaust port 330 on both sides of the negative pressure cylinder 300, this arrangement can also disperse the compressed high-temperature gas to avoid the concentration of high-temperature gas, so that the heat dissipation performance of the positive and negative pressure pumps will be better, and ultimately increase the service life.

[0025] 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, characterized in that: include: Motor, positive pressure cylinder and negative pressure cylinder; The motor is arranged at one side of the negative pressure cylinder, the positive pressure cylinder and the negative pressure cylinder are arranged correspondingly, 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 oxygen concentrator according to claim 1, characterized in that: The positive-pressure cylinder and the negative-pressure cylinder are both piston cylinders.

3. The double-head piston positive and negative pressure pump for oxygen concentrator according to claim 2, characterized in that: 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 oxygen concentrator according to claim 1, characterized in that: A positive pressure cylinder end cover is provided at one end of the positive pressure cylinder, and a positive pressure air inlet is provided at the other end. A positive pressure exhaust port is provided on the positive pressure cylinder end cover, and both the positive pressure air inlet and the positive pressure exhaust port are connected to the interior of the positive pressure cylinder.

5. The double-head piston positive and negative pressure pump for oxygen concentrator according to claim 4, characterized in that: A negative pressure cylinder end cover is provided at one end of the negative pressure cylinder, and a negative pressure air inlet is provided on one side of the negative pressure cylinder, and a negative pressure exhaust port is provided on the negative pressure cylinder end cover, and both the negative pressure air inlet and the negative pressure exhaust port are connected to the interior of the negative pressure cylinder.

6. The double-head piston positive and negative pressure pump for oxygen concentrator according to claim 5, characterized in that: The positive pressure air inlet is located on one side of the positive pressure cylinder, the positive pressure exhaust port is located on the other side of the positive pressure cylinder, the negative pressure air inlet is located on one side of the negative pressure cylinder, and the negative pressure exhaust port is located on the other side of the negative pressure cylinder.

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