Medical air compressor

Abstract

The application discloses a medical air compressor, which comprises an air compressor, wherein the output end of the air compressor is connected with the air inlet end of a gas storage tank; a first stop valve is arranged on a first air conveying pipe between the air compressor and the gas storage tank; the air outlet end of the gas storage tank is connected with the air inlet end of a filter; a second stop valve is arranged on a second air conveying pipe between the gas storage tank and the filter; the air outlet end of the filter is connected with the air inlet end of an air drying device; the air outlet end of the air drying device is connected with the air inlet end of a first bacteria removing filter; a first pressure regulating valve and a first pressure sensor are sequentially arranged on the output end of the first bacteria removing filter; a first dew point sensor is arranged on a third air conveying pipe between the air drying device and the bacteria removing filter; and the first dew point sensor, the first pressure sensor, the air compressor and the air drying device are connected with a monitoring and control device. The application has the advantages of simple structure, stability, energy saving, relatively long service life and relatively low maintenance cost.

Description

Technical Field

[0001] This invention relates to the field of air compressor technology, and more specifically to a medical air compressor. Background Technology

[0002] Medical air compressors are an essential part of the infrastructure of hospitals and medical institutions, and the quality of medical air is directly related to the life safety and health of patients. Therefore, the physical and chemical requirements for medical compressed air are more stringent than those for ordinary compressed air.

[0003] Medical air compressors consist of an air compressor (compression pump), filters, an air tank, an air dryer, and monitoring and control devices. The basic process flow of medical air compressors currently on the market is as follows: air is compressed and pressurized by the air compressor and then discharged into the air tank for buffering. It then passes through a primary filter and a precision filter to remove most solid particles and oil-water mixtures. The saturated compressed air then undergoes further dehydration through an air dryer, and finally passes through a sterilization filter to output qualified compressed air, which is then delivered to various air-using terminals through the hospital's pipeline system.

[0004] Medical compressed air includes medical air and instrument air. The biggest difference between the two types lies in their moisture content, a key physicochemical property. Medical air has a moisture content of less than or equal to 575 mg / Nm³. 3 The moisture content of the instrument air is less than or equal to 50 mg / Nm³. 3 Therefore, in order to meet the physicochemical requirements of both types of medical compressed air, manufacturers on the market design and develop products according to the parameter standards of instrument air. The lower the moisture content of the output compressed air, the higher the amount of compressed air consumed by the air drying device. As a result, medical air compressors consume 10% or more more air volume to produce a unit volume of instrument air than medical air. In practical applications, the amount of medical air used is greater than that of instrument air, which leads to problems such as high energy consumption, short lifespan, and high maintenance costs for medical air compressors. Summary of the Invention

[0005] The purpose of this invention is to overcome the shortcomings of the prior art and provide a medical air compressor that is simple in structure, stable, energy-saving, has a relatively long service life, and relatively low maintenance costs.

[0006] To achieve the above objectives, the present invention adopts the following solution: a medical air compressor, comprising an air compressor, the output end of which is connected to the inlet end of an air storage tank, a first shut-off valve provided on a first air supply pipe between the air compressor and the air storage tank, the outlet end of the air storage tank connected to the inlet end of a filter, a second shut-off valve provided on a second air supply pipe between the air storage tank and the filter, the outlet end of the filter connected to the inlet end of an air drying device, the outlet end of the air drying device connected to the inlet end of a first sterilizing filter, a first pressure regulating valve and a first pressure sensor sequentially provided on the output end of the first sterilizing filter, a first dew point sensor provided on a third air supply pipe between the air drying device and the sterilizing filter, the first dew point sensor, the first pressure sensor, the air compressor, and the air drying device being respectively connected to a monitoring and control device.

[0007] As another improvement to the medical air compressor of the present invention, the air drying device includes a refrigerated dryer, a first adsorption dryer and a second adsorption dryer connected in series, and the third air supply pipe is disposed between the second adsorption dryer and the sterilization filter.

[0008] As another improvement to the medical air compressor of the present invention, a fourth air supply pipe is provided on the first adsorption dryer. The outlet end of the fourth air supply pipe is connected to the inlet end of the second sterilization filter. A second pressure regulating valve and a second pressure sensor are sequentially provided on the output end of the second sterilization filter. A second dew point sensor is provided on the fourth air supply pipe. The second dew point sensor and the second pressure sensor are respectively connected to the monitoring and control device.

[0009] As another improvement to the medical air compressor of the present invention, a first check valve and a third shut-off valve are sequentially provided on the outlet end of the first pressure regulating valve, and the first pressure sensor is provided on the pipeline between the first check valve and the third shut-off valve.

[0010] As another improvement to the medical air compressor of the present invention, a second check valve and a fourth shut-off valve are sequentially provided on the outlet end of the second pressure regulating valve, and the second pressure sensor is provided on the pipeline between the second check valve and the fourth shut-off valve.

[0011] As another improvement to the medical air compressor of the present invention, the filter includes a primary filter and a precision filter. The air inlet of the primary filter is connected to the air outlet of the air storage tank, and the air outlet of the primary filter is connected to the air inlet of the precision filter.

[0012] As another improvement to the medical air compressor of the present invention, a fifth shut-off valve is provided on the air storage tank, and a pressure gauge is provided on the outlet end of the fifth shut-off valve.

[0013] As another improvement to the medical air compressor of the present invention, a safety valve is provided on the air storage tank.

[0014] As another improvement to the medical air compressor of the present invention, two first shut-off valves are connected in series on the first air delivery pipe between the air compressor and the air tank.

[0015] In summary, the advantages of this invention over the prior art are:

[0016] 1. Under the same conditions of output gas requirements, the air compressor discharge capacity requirement of the medical air compressor component of the present invention is reduced, so the power of the whole machine is lower and more energy-efficient than that of other manufacturers.

[0017] 2. In the medical air compressor of this invention, the gas discharged from the air compressor is pretreated before entering the adsorption dryer, which reduces the compressed air consumption of the adsorption dryer, extends the life of the adsorption dryer, reduces maintenance costs, and improves the stability of the whole machine.

[0018] 3. The medical air compressor of the present invention can simultaneously output medical air and instrument air, meeting the needs of medical institutions for medical air.

[0019] 4. The medical air compressor of this invention can automatically adjust the compressed air consumption according to the working conditions, thereby reducing the average energy consumption and maintenance costs of the whole machine. Attached Figure Description

[0020] Figure 1 This is a schematic diagram of the present invention.

[0021] In the diagram: 1. Air compressor; 2. Air tank; 3. First air supply pipe; 4. First shut-off valve; 5. Filter; 6. Second air supply pipe; 7. Second shut-off valve; 8. Air drying device; 9. First pressure regulating valve; 10. First pressure sensor; 11. Third air supply pipe; 12. First dew point sensor; 13. Control device; 14. Refrigerated dryer; 15. First adsorption dryer; 16. Second adsorption dryer; 17. Fourth air supply pipe; 18. Second pressure regulating valve; 19. Second pressure sensor; 20. Second dew point sensor; 21. First check valve; 22. Third shut-off valve; 23. Second check valve; 24. Fourth shut-off valve; 25. Primary filter; 26. Precision filter; 27. Fifth shut-off valve; 28. Pressure gauge; 29. ​​Safety valve; 30. First sterilizing filter; 31. Second sterilizing filter.

[0022] The above-mentioned and other technical features and advantages of the present invention will be described in more detail below with reference to the accompanying drawings.

[0023] Preferred embodiments of the present invention will now be described with reference to the accompanying drawings. Those skilled in the art should understand that these embodiments are merely illustrative of the technical principles of the present invention and are not intended to limit the scope of protection of the present invention.

[0024] It should be noted that in the description of this invention, the terms "upper", "lower", "left", "right", "inner", "outer", etc., which indicate directions or positional relationships, are based on the directions or positional relationships shown in the accompanying drawings. This is only for the convenience of description and is not intended to indicate or imply that the device or element must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, it should not be construed as a limitation of this invention.

[0025] Furthermore, it should be noted that, in the description of this invention, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "linking" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this invention according to the specific circumstances.

[0026] like Figure 1 As shown, a medical air compressor includes an air compressor 1. The output end of the air compressor 1 is connected to the air inlet end of an air storage tank 2. A first shut-off valve 4 is provided on a first air supply pipe 3 between the air compressor 1 and the air storage tank 2. The air outlet end of the air storage tank 2 is connected to the air inlet end of a filter 5. A second shut-off valve 7 is provided on a second air supply pipe 6 between the air storage tank 2 and the filter 5. The air outlet end of the filter 5 is connected to the air inlet end of an air drying device 8. The air outlet end of the air drying device 8 is connected to the air inlet end of a first sterilizing filter 30. A first pressure regulating valve 9 and a first pressure sensor 10 are sequentially provided on the output end of the first sterilizing filter 30. A first dew point sensor 12 is provided on a third air supply pipe 11 between the air drying device 8 and the sterilizing filter 5. The first dew point sensor 12, the first pressure sensor 10, the air compressor 1, and the air drying device 8 are respectively connected to a monitoring and control device 13.

[0027] In this invention, a fourth air supply pipe 17 is provided on the first adsorption dryer 15. The outlet end of the fourth air supply pipe 17 is connected to the inlet end of the second sterilization filter 31. A second pressure regulating valve 18 and a second pressure sensor 19 are sequentially provided on the output end of the second sterilization filter 31. A second dew point sensor 20 is provided on the fourth air supply pipe 17. The second dew point sensor 20 and the second pressure sensor 19 are respectively connected to the monitoring and control device 13. A first check valve 21 and a third shut-off valve 22 are sequentially provided on the outlet end of the first pressure regulating valve 9. The first pressure sensor 10 is located on the pipe between the first check valve 21 and the third shut-off valve 22. A second check valve 23 and a fourth shut-off valve 24 are sequentially provided on the outlet end of the second pressure regulating valve 18. The second pressure sensor 19 is located on the pipe between the second check valve 23 and the fourth shut-off valve 24. The filter 5 includes a primary filter 25 and a precision filter 26. The air inlet of the primary filter 25 is connected to the air outlet of the air storage tank 2, and the air outlet of the primary filter 25 is connected to the air inlet of the precision filter 26.

[0028] Figure 1 The dashed line represents a cable, through which the monitoring and control device 13 provides power and data exchange to the components; the solid line represents a pipe, through which compressed air flows to each component.

[0029] The monitoring and control device 15 controls the operation of each component according to the process of the medical air compressor. When the signal value of the second pressure sensor 19 is lower than the limit value, the second unit of the air drying device 8 starts working; when the signal value of the second pressure sensor 19 is higher than the limit value, the second unit of the air drying device 8 stops working. If the signal value of the second dew point sensor 7 is higher than the limit value, the air consumption of the second unit of the air drying device 8 is adjusted to meet the moisture content requirement of the output gas. When the signal value of the first pressure sensor 10 is lower than the limit value, the second and third units of the air drying device 8 start working; when the signal value of the first pressure sensor 10 is higher than the limit value, the second and third units of the air drying device 8 stop working. If the signal value of the first dew point sensor 12 is higher than the limit value, the air consumption of the third unit of the air drying device is adjusted to meet the moisture content requirement of the output gas.

[0030] The air drying device 8 of this invention includes a refrigerated dryer 14, a first adsorption dryer 15, and a second adsorption dryer 16 connected in series. The third air supply pipe 11 is disposed between the second adsorption dryer 16 and the first sterilization filter 30. This invention designs the air drying device in a medical air compressor as three processing units: the first unit is a refrigerated dryer, and the second and third units are both adsorption dryers. The refrigerated dryer pre-treats compressed air, controlling the pressure dew point of the output compressed air to within 10℃ and the gas temperature to no higher than 35℃. This reduces the air consumption of the second and third units and extends the lifespan of the adsorbate, thereby reducing the energy consumption and maintenance costs of the medical air compressor. The pre-treated compressed air then passes through the second unit's gas adsorption dryer, where its moisture content meets medical air standards. After further processing by a sterilization filter, it is output to the pipeline system for use at medical air terminals. The compressed air, after being processed by the first adsorption dryer in the second unit, undergoes further dehydration in the second adsorption dryer in the third unit, achieving a moisture content that meets the requirements for instrument air. It is then processed by a sterilization filter before being output to the pipeline system for use at instrument air terminals. The separate dehydration devices for medical air and instrument air primarily aim to reduce the required air compressor (compression pump) discharge volume, decrease air consumption, extend the lifespan of the adsorbate in the third unit, and overall reduce the maintenance costs of the medical air compressor.

[0031] The present invention includes a fifth shut-off valve 27 on the air storage tank 2, and a pressure gauge 28 on the outlet end of the fifth shut-off valve 27. A safety valve 29 is also provided on the air storage tank 2. Two first shut-off valves 4 are connected in series on the first air supply pipe 3 between the air compressor 1 and the air storage tank 2.

[0032] Under the same output gas requirements, this invention reduces the required air compressor discharge volume in its medical air compressor assembly, resulting in lower overall power consumption and greater energy efficiency compared to other manufacturers. The air discharged from the air compressor in this invention undergoes pretreatment before entering the adsorption dryer, reducing compressed air consumption and extending the dryer's lifespan, thus lowering maintenance costs and improving overall stability. This invention's medical air compressor can simultaneously output medical air and instrument air, meeting the medical air needs of medical institutions. Furthermore, this invention's medical air compressor can automatically adjust compressed air consumption according to operating conditions, reducing average energy consumption and maintenance costs.

[0033] The foregoing has shown and described the basic principles and main features of the present invention, as well as its advantages. Those skilled in the art should understand that the present invention is not limited to the above embodiments. The embodiments and descriptions in the specification are merely illustrative of the principles of the invention. Various changes and modifications can be made to the invention without departing from its spirit and scope, and all such changes and modifications fall within the scope of the present invention as claimed. The scope of protection of this invention is defined by the appended claims and their equivalents.

Claims

1. A medical air compressor, characterized in that: The system includes an air compressor (1), the output end of which is connected to the inlet end of an air storage tank (2). A first shut-off valve (4) is provided on a first air supply pipe (3) between the air compressor (1) and the air storage tank (2). The outlet end of the air storage tank (2) is connected to the inlet end of a filter (5). A second shut-off valve (7) is provided on a second air supply pipe (6) between the air storage tank (2) and the filter (5). The outlet end of the filter (5) is connected to the inlet end of an air drying device (8). The air outlet of the air dryer (8) is connected to the air inlet of the first sterilization filter (30). A first pressure regulating valve (9) and a first pressure sensor (10) are sequentially provided on the output end of the first sterilization filter (30). A first dew point sensor (12) is provided on the third air supply pipe (11) between the air dryer (8) and the first sterilization filter (30). The first dew point sensor (12), the first pressure sensor (10), the air compressor (1), and the air dryer (8) are respectively connected to the monitoring and control device (13). The air drying device (8) includes a refrigerated dryer (14), a first adsorption dryer (15), and a second adsorption dryer (16) connected in series. The third air supply pipe (11) is disposed between the second adsorption dryer (16) and the first sterilization filter (30). A fourth air supply pipe (17) is provided on the first adsorption dryer (15). The outlet end of the fourth air supply pipe (17) is connected to the inlet end of the second sterilization filter (31). A second pressure regulating valve (18) and a second pressure sensor (19) are sequentially provided on the output end of the second sterilization filter (31). A second dew point sensor (20) is provided on the fourth air supply pipe (17). The second dew point sensor (20) and the second pressure sensor (19) are respectively connected to the monitoring and control device (13). When the signal value of the second pressure sensor (19) is lower than the limit value, the first adsorption dryer (15) of the air drying device (8) starts working. When the signal value of the second pressure sensor (19) is higher than the limit value, the first adsorption dryer (15) of the air drying device (8) stops working. If the signal value of the second dew point sensor (20) is higher than the limit value, the air consumption of the first adsorption dryer (15) of the air drying device (8) is adjusted to meet the water content requirement of the output gas. When the signal value of the first pressure sensor (10) is lower than the limit value, the first adsorption dryer (15) and the second adsorption dryer (16) of the air drying device (8) start working. When the signal value of the first pressure sensor (10) is higher than the limit value, the first adsorption dryer (15) and the second adsorption dryer (16) of the air drying device (8) stop working. If the signal value of the first dew point sensor (12) is higher than the limit value, the air consumption of the second adsorption dryer (16) of the air drying device is adjusted to meet the water content requirement of the output gas.

2. A medical air compressor according to claim 1, characterized in that: A first check valve (21) and a third shut-off valve (22) are sequentially installed on the outlet end of the first pressure regulating valve (9), and the first pressure sensor (10) is installed on the pipeline between the first check valve (21) and the third shut-off valve (22).

3. A medical air compressor according to claim 1, characterized in that: A second check valve (23) and a fourth shut-off valve (24) are sequentially installed on the outlet end of the second pressure regulating valve (18), and the second pressure sensor (19) is installed on the pipeline between the second check valve (23) and the fourth shut-off valve (24).

4. A medical air compressor according to claim 1, characterized in that: The filter (5) includes a primary filter (25) and a precision filter (26). The inlet of the primary filter (25) is connected to the outlet of the gas storage tank (2), and the outlet of the primary filter (25) is connected to the inlet of the precision filter (26).

5. A medical air compressor according to claim 1, characterized in that: A fifth shut-off valve (27) is provided on the gas storage tank (2), and a pressure gauge (28) is provided on the gas outlet end of the fifth shut-off valve (27).

6. A medical air compressor according to claim 5, characterized in that: A safety valve (29) is provided on the gas storage tank (2).

7. A medical air compressor according to claim 1, characterized in that: Two first shut-off valves (4) are connected in series on the first air supply pipe (3) between the air compressor (1) and the air storage tank (2).

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