• 专利附录
  • 专利说明
  • 权利要求
  • 类似技术
  • 同族专利
  • 引用文献
  • 法律状态
  • 优先权
    • 专利摘要:

    公开号:NL2005844A
    申请号:NL2005844
    申请日:2010-12-09
    公开日:2011-10-11
    发明作者:Der Torsten Schr；Hanno Kretschmann；Jan-Gerd Eilers
    申请人:Ger Medical Ag & Co Kg Dr；
    IPC主号:
    专利说明:

    Compressed air monitoring device
    The present invention relates to a compressed air monitoring device according to the preamble of claim 1, an air compressor device according to the preamble of claim 10 and a method for obtaining medical compressed air according to the preamble of claim 12.
    Air compressors are used in hospitals to supply compressed air users in the hospital with medical compressed air through a network of compressed air supply lines. The medical compressed air supplied by the air compressor device is recorded by a compressed air monitoring device on the various parameters, in particular the gas concentration. For example, concentrations of gaseous pollutants such as sulfur dioxide or nitrogen dioxide are registered in order to provide compressed air users with a medically flawless medical compressed air. Sensors for recording the parameters of medical compressed air are used for this purpose in the compressed air monitoring device. The medical compressed air conducted from the air compressor device into the compressed air supply line is thereby purified by means of a purification device with filters and dehumidified with a dehumidifier device to a moisture content of less than 67 ppm. As a result, the sensors for registering the parameters of medical compressed air also receive highly dried air. As a result, in particular electrochemical sensors dry out after a short time, for example in less than 3 months, and they can no longer be used. As a result, a replacement of the sensors of the compressed air monitoring device after this time is necessary to exclude the failure of these important sensors. This is accompanied by extra efforts and consequently also costs and there is furthermore the risk that at least one sensor of the compressed air control device fails, so that the parameter or gas concentration registered by the failed sensor can therefore not be registered in a disadvantageous manner. .
    The problem of the present invention is therefore to provide a compressed air monitoring device, a compressed air compressor device and a method for obtaining medical compressed air, wherein the monitored parameters of the compressed air can be measured continuously and reliably with low technical costs.
    This problem is solved with a compressed air control device for an air compressor device of medical compressed air, which has a measuring line for continuously extracting compressed air from a compressed air supply line, at least one sensor for continuously recording at least one parameter of the medical line continuously fed through the measuring line compressed air, wherein an air humidifier is placed in front of the at least one sensor in the direction of flow of the medical compressed air, so that the at least one sensor is provided with humidified compressed air. The humidifier humidifies the medical compressed air dehumidified by a dehumidifier before it reaches the at least one sensor, so that in this way the at least one sensor does not dry out in an advantageous manner and is therefore reliably used for a longer time, for example of more than 6 months. can be used for registering the at least one parameter.
    In particular, the air humidifier is connected to the measuring air line in the direction of flow of the medical compressed air after it has been extracted from the compressed air supply line. Only a small amount of medical compressed air is fed into the measuring air line from the compressed air supply line and only after extracting the medical compressed air from the compressed air supply line and introducing it into the measuring air line is the medical compressed air guided by the measuring air line humidified in the humidifier. As a result, the medical compressed air fed to the compressed air consumers is not humidified by the humidifier and only the medical compressed air extracted from the compressed air supply line, which is intended for the at least one sensor, is humidified by the humidifier.
    In a further embodiment the humidifier comprises a semi-permeable water-permeable membrane, in particular from Nafion. As a sulphonated tetrafluoroethylene polymer, Nafion has the property that it does not absorb harmful gases, for example carbon monoxide, sulfur dioxide or nitrogen dioxide, and furthermore that in case of overpressure in a first space through the semi-permeable water-permeable membrane of Nafion no harmful gases in the diffuse second space.
    The semipermeable water-permeable membrane is advantageously designed such that the membrane does not absorb harmful gases and / or that no harmful gases diffuse through the semipermeable water-permeable membrane.
    In a further embodiment the semipermeable membrane separates a first space from a second space within the humidifier and through the first space the medical compressed air to be moistened can be passed and in the second space is water or gas, in particular air, with a higher relative humidity than the medical compressed air introduced into the first room.
    In a further embodiment, the membrane is arranged disc-like in the compressed air control device and in this way separates the first space from the second space.
    The semipermeable water-permeable membrane is preferably designed as a hose.
    In a variant, the gas is present in the second space with a substantially constant relative humidity. A substantially constant relative humidity means that the relative humidity deviates from a predetermined norm of relative humidity with a deviation of less than 30%, 20%, 10%, 5% or 2%.
    In a further embodiment, the constant relative humidity in the second space is obtained in that the relative humidity in the second space is registered by means of air humidity control devices and, in the event of deviations from a specific norm with regard to the relative humidity, the relative humidity is increased or decreased, e.g. in that the temperature is changed and / or moisture is supplied to the second space or is extracted from the second space.
    A saturated water-salt solution and the moist gas are conveniently introduced into the second space.
    In a further embodiment, the salt in the water-salt solution is potassium sulfate and / or potassium nitrate and / or potassium chloride and / or ammonium sulfate and / or sodium chloride and / or sodium nitrite and / or ammonium nitrate and / or sodium bichromate and / or magnesium nitrate and / or potassium carbonate and / or magnesium gnesium chloride and / or potassium acetate and / or lithium chloride and / or calcium nitrate. The relative air humidity in the second space depends essentially on the salt used in the water-salt solution. When magnesium chloride is used, the relative humidity in the second space is, for example, 21% and 22% respectively at a temperature in the range between 10 ° C and 40 ° C. When using sodium chloride as a salt, the relative humidity is, for example, 75% or 76% at a temperature in the range between 5 ° C and 50 ° C. A substantially constant relative air humidity in the second space preferably means that the relative air humidity deviates from a certain norm of relative air humidity with a deviation of less than 20%, 10%, 5% or 2%. By using the water-salt solution, a substantially constant relative humidity can be obtained in the second room in a technically very simple manner. In the humidifier, the compressed air fed through the measuring air line is humidified at a relative humidity between 5% and 95%, preferably between 15% and 70%, and in particular between 20% and 30%. As a result, the at least one sensor can be used for a longer period of time, for example of more than 6 months, without the at least one sensor drying out, so that a reliable recording of the at least one parameter of the medical compressed air is possible.
    In particular, the at least one sensor is a sensor for registering the carbon dioxide content and / or a sensor for registering the carbon monoxide content and / or a sensor for recording the sulfur dioxide content and / or a sensor for registering the content of nitrogen dioxide and / or a sensor for registering the content of oxygen and / or a sensor for registering the relative and / or absolute humidity and / or a sensor for recording the temperature and / or the at least one sensor an electrochemical sensor and / or an infrared sensor and / or a ceramic moisture sensor and / or a method described in this application can be carried out.
    Compressed air compressor devices according to the invention for a hospital comprise an air compressor, for example a piston compressor or a screw compressor for compacting ambient air to medical compressed air, a dehumidifying direction for dehumidifying the sucked-in ambient air and a compressed air monitoring device for monitoring at least one parameter of the medical air compressed air, wherein the compressed air monitoring device is designed as a compressed air monitoring device described in this application.
    In a further variant, the measuring air line of the compressed air control device is connected to a compressed air supply line in the direction of flow of the compressed air after the dehumidification device and preferably after the air compressor.
    The method according to the invention for preparing medical compressed air, in particular with an air compressor device described in this application, comprises the following steps: sucking in ambient air, compacting the sucked-in ambient air, dehumidifying the air and introducing the air compressed and dehumidified medical compressed air in a compressed air supply line, directing medical compressed air to at least one sensor, registering at least one parameter of the compacted and dehumidified medical compressed air with the at least one sensor, the one to the at least one sensor sensor guided, compacted and dehumidified medical compressed air is humidified prior to being fed to the at least one sensor.
    In a further variant, the medical compressed air is humidified in that water, in particular gaseous water as water vapor, diffuses through a semi-permeable or water-permeable membrane.
    In a further variant, the water diffuses from a second space through the membrane into the first space with the medical compressed air.
    In a further embodiment, gas, in particular air, with a substantially constant relative humidity, is present in the second space, in particular because the gas and a saturated water-salt solution are present in the second space and the water from the water-salt solution in the gas evaporates.
    In a further embodiment, the at least one parameter of the compressed and dehumidified medical compressed air is continuously recorded by the at least one sensor.
    In a further embodiment, the medical compressed air fed to the at least one sensor through a measuring air line is humidified to a certain standard of relative air humidity in the range between 5% and 95%, for example in range between 15% and 70%, in particular between 20% and 30%.
    In a further embodiment, from the compressed air supply line, where a compressed air supply line is also considered a compressed air reservoir, a part of the medical compressed air guided through the compressed air supply line is extracted and humidified in an air humidifier.
    In a further variant, a volume flow in the range between 0.05 and 1 l / min, in particular in the range between 0.1 and 0.5 l / min, preferably in the range between 0.2, becomes through the measuring air line and 0.3 l / min.
    In a preferred variant, the medical compressed air is compressed by the compressor to a pressure in the range between 8 bar and 15 bar, worked-up to 4 to 10 bar, in particular reduced to 5 bar.
    An exemplary embodiment of the invention is further described below with reference to the accompanying drawing. Hereby shows:
    Figure 1 a simplified representation of an air compressor device.
    An air compressor device 2 shown in Figure 1 makes medical compressed air available to various compressed air users 11 in the hospital as an on-site device in a hospital. For this purpose, a network of compressed air supply lines 10 has been laid in the hospital, whereby the compressed air consumers 11 are supplied with medical compressed air by the air compressor device 2.
    The air compressor device 2 comprises an air suction line 4, a dehumidifier device 5 designed as adsorption dryer 6 and an air compressor 7 designed as a piston compressor 8. The compressed air compressed by the piston compressor 8 is stored in a compressed air reservoir 9. For the preparation of medical compressed air, ambient air is therefore sucked in through the air suction line 4, the ambient air sucked in in the adsorption dryer 6 is reduced to a moisture content of less than 67 ppm. The air drawn in is compressed in the air compressor 7 to a pressure in the range of approximately 12 bar and directed to the compressed air reservoir 9. The medical compressed air is released from the compressed air reservoir 9 via the first pressure reducer 13a to the operating pressure of 4 to 10 bar and made available by the compressed air supply line 10 to the various compressed air consumers 11 within the hospital (not shown).
    The medical compressed air conducted from the air compressor device 2 into the compressed air supply lines 10 is reduced via the second pressure reducer 13b to a pressure of, for example, 1.2 bar with a volume flow of, for example, 5 to 1.0 l / min and into the measuring air line 12 and continuously checked for various parameters by a compressed air monitoring device 1, for example the limit values such as the concentration of polluting gases. For this purpose, the compressed air monitoring device 1 comprises different sensors 14, 15, 16, 17, 18 and 19. The sensors 15 to 19 are placed within a sensor housing 31. The sensor 15 serves to record the carbon dioxide concentration, the sensor 16 serves to record the nitrogen dioxide concentration, the sensor 17 serves to record the carbon monoxide concentration, the sensor 18 serves to record the sulfur dioxide concentration and the sensor 19 serves to record the oxygen concentration. The sensor 14 for recording the relative humidity is connected to the measuring air line 12 in the direction of flow of the medical compressed air for an air humidifier 3. The compressed air monitoring device 1 comprises a data processing and / or data storage device 29 and an optical and / or acoustic alarm device 30. From the data processing and / or data storage device 29 the parameters of the medical compressed air continuously recorded by the sensors 14 to 19 are determined. standards, the parameters are documented or stored and when an limit value is exceeded, an alarm is automatically activated at an optical and / or acoustic alarm device 30.
    From the compressed air supply line 10 with the medical compressed air in the range of 4 to 10 bar behind the first pressure reducer 13a, a small amount of the medical compressed air conducted through the compressed air supply line 10 is continuously withdrawn from the measuring air line 12. Moreover, the second pressure reducer 13b is placed in the measuring air line 12 of the compressed air supply line 10. As a result, the medical compressed air flows through the measuring air line 12 because of the low overpressure with respect to atmospheric pressure through the measuring air line 12, the air humidifier 3 and the sensors 14 to 19. After passing through the medical compressed air through the measuring air line 12, this small amount comes through the measuring air line 12 conducts medical compressed air out again at the sensor housing 31 and is fed into the environment.
    The humidifier 3 has a fluid-tight housing 20. Inside the housing 20 a hose 21 of a semi-permeable water-permeable membrane, for example from Nation, is arranged. The hose 21 of Nafion has a length in the range between 10 cm and 80 cm. The hose 21 moreover also forms the measuring air line 12. The medical compressed air extracted by the measuring air line 12 from the compressed air supply line 10 is led through the housing 20 into an inner space enclosed by the housing 20. Moreover, the inner space enclosed by the housing 20 is separated by the hose 21 into a first space 22 inside the hose 21 and a second space 23 outside the hose 21. In the second space 23 there is a saturated water-salt solution 24. Due to the saturated water-salt solution 24 is also at the bottom of the housing 20 the salt 25. As salt 25, for example, magnesium chloride is used. Above the water-salt solution 24 there is moist air 32. The space 23 therefore contains moist air 32 with a constant relative humidity in the range of approximately 30%. Medical compressed air with a volume flow of, for example, 0.25 1 / min is passed through the measuring air line 12 and therefore also through the hose 21. Because of the sufficient length and therefore the sufficiently large surface area of the hose 21, the moisture of the moist air 32 diffuses through the hose 21 into the medical compressed air, so that it is also humidified to a relative air humidity in the range between 25% and 30%. After humidifying the medical compressed air and passing through the hose 21, the medical compressed air flowing out of the hose 21 is conducted further via the measuring air line 12 and supplied to the sensors 15 to 19 within the sensor housing 31. As a result, the sensors 15 to 19 medical compressed air with a constant relative humidity in the range between 25% and 30% so that they cannot dry out and be used reliably for a longer period of, for example, more than six months, without having to replace the sensors 15 to 19 .
    The hose 21 from Nation does not adsorb polluting or harmful gases such as, for example, carbon monoxide, sulfur dioxide or nitrogen dioxide, so that through the passage of the medical compressed air through the hose 21 no distortion of the harmful gas levels recorded by the sensors 15 to 19 occurs. Moreover, harmful gases do not diffuse through the hose 21 from the first space within the hose 21 to the second space 23 with the moist air 32, so that also the parameters recorded by the sensors 15 to 19 are not distorted, but by the sensors 15 to 19 the medical compressed air extracted from the compressed air supply line 10 can actually be registered.
    In a preferred embodiment, the humidifier 3 comprises a water level recording device 26 designed as a float 27 and a water level indicating device 28. If the water level present or the position of the water-salt solution 24 drops below a certain standard, this can be indicated by means of an optical and / or acoustic alarm device (not shown). The fluid-tight housing 20 further comprises a closable opening through which water in the second space 23 can be replenished as required. Only so much water may be added that the water-salt solution 24 is still saturated and therefore a constant relative humidity of the moist air 32 above the water-salt solution 24 is guaranteed, so that from the water-salt solution 24 the water evaporates and vaporous water is available in the moist air 32 for diffusion through the hose 21. The volume of the housing 20 is hereby calculated such that a water-salt solution 24 with a sufficiently large volume can be introduced into the housing 20, so that replenishing water in the housing 20 during a period of at least six or nine months is needed. Hereby the compressed air monitoring device 1 can record parameters of the medical compressed air for a period of at least six months, while on the one hand the sensors 15 to 19 are supplied with humidified air and therefore replacement of the sensors 15 to 19 is not necessary and on the other hand due to sufficiently large volume of water-salt solution 24 replenishing the water in the housing 20 is not necessary. Considered overall, the compressed air control device according to the invention has considerable advantages. The saturated water-salt solution ensures a substantially constant relative humidity at normal ambient temperature of 10 ° C to 40 C, so that with little technical maintenance with the hose 21 within the second space 23 the medical compressed air can be supplemented to a constant relative humidity to become. Advantageously, there is no distortion of the concentrations of harmful substances at the humidifier 3.
    LIST OF REFERENCE SIGNS
    1 compressed air monitoring device 2 air compressor device 3 air humidifier 4 air suction line 5 dehumidification device 6 adsorption dryer 7 air compressor 8 piston pump 9 compressed air reservoir 10 compressed air supply line 11 compressed air consumers 12 measuring air line 13 13a, first pressure reducer; 13b, second pressure reducer 14 sensor for registering the humidity 15 sensor for registering the carbon dioxide content 16 sensor for registering the nitrogen dioxide content 17 sensor for registering the carbon monoxide content 18 sensor for registering the content sulfur dioxide 19 oxygen content sensor 20 fluid-tight housing of the humidifier 21 semi-permeable water-permeable membrane tube 22 first space inside the hose 23 second space with moist air 24 water-salt solution 25 salt 2 6 water level registration device 27 float 28 water level indicator unit 29 data processing and data storage device 30 optical and / or acoustic alarm device 31 sensor housing 32 moist air
    权利要求:
    Claims (15)
    [1]
    Compressed air monitoring device (1) for an air compressor device (2) of medical compressed air, comprising a measuring air line (12) for continuously extracting compressed air from a compressed air supply line (10) at least one sensor (14, 15, 16, 17 , 18, 19) for continuously recording at least one parameter of the medical compressed air continuously passed through the measuring air line (12), characterized in that in the direction of flow of the medical compressed air for the at least one sensor (14, 15, 16 , 17, 18, 19) an air humidifier (3) is placed, so that the at least one sensor is supplied with humidified compressed air.
    [2]
    Compressed air monitoring device according to claim 1, characterized in that the air humidifier (3) is connected to the measuring air line (12) in the direction of flow of the medical compressed air after it has been extracted from the compressed air supply line (10).
    [3]
    Compressed air monitoring device according to claim 1 or 2, characterized in that the humidifier (3) comprises a semipermeable, water-permeable membrane, in particular from Nafion.
    [4]
    Compressed air monitoring device according to claim 3, characterized in that the semipermeable membrane separates a first space (22) from a second space (23) inside the humidifier (3) and through the first space (22) the medical compressed air to be humidified can be conducted and water or gas, in particular air, is present in the second space (23) with a higher relative humidity than the medical compressed air introduced into the first space (22).
    [5]
    Compressed air monitoring device according to claim 3 or 4, characterized in that the semi-permeable water-permeable membrane is designed as a hose (21).
    [6]
    Compressed air monitoring device according to claim 4 or 5, characterized in that the gas is available in the second space (23) with a substantially constant relative humidity.
    [7]
    Compressed air monitoring device according to claim 6, characterized in that a saturated water-salt solution and the moist gas (32) are present in the second space (23).
    [8]
    Compressed air monitoring device according to one or more of the preceding claims, characterized in that the at least one sensor (14, 15, 16, 17, 18, 19) is a sensor (15) for recording the concentration of carbon dioxide and / or a sensor (17) for registering the concentration of carbon monoxide and / or a sensor (18) for registering the concentration of sulfur dioxide and / or a sensor (16) for recording the concentration of nitrogen dioxide and / or a sensor ( 19) for recording the concentration of oxygen and / or a sensor (14) for recording the relative and / or absolute humidity and / or a sensor for recording the temperature and / or the at least one sensor (14) , 15, 16, 17, 18, 19) is an electrochemical sensor (16, 17, 18) and / or an infrared sensor (15) and / or a ceramic moisture sensor (14).
    [9]
    A compressed air monitoring device according to one or more of the preceding claims for performing a method according to one or more of claims 12 to 15.
    [10]
    A hospital air compressor (2) comprising an air compressor (7), in particular a piston compressor (8) for compressing ambient air to medical compressed air, a dehumidifier (5, 6) for dehumidifying the aspirated ambient air and a compressed air monitoring device (1) for monitoring at least one parameter of the medical compressed air, characterized in that the compressed air monitoring device (1) is designed as a compressed air monitoring device (1) according to one or more of the preceding claims is.
    [11]
    Air compressor device according to claim 10, characterized in that the measuring air line (12) of the compressed air monitoring device (1) on a compressed air supply line (10) in the flow direction of the compressed air after the dehydrating device (5, 6) and at is preferably placed after the air compressor (7, 8), and / or that a method according to one or more of claims 12 to 15 can be carried out with the air compressor device (2).
    [12]
    Method for preparing medical compressed air, in particular with an air compressor device according to claim 10 or 11, with the following steps: sucking in ambient air, compacting the sucked-in ambient air, dehumidifying the sucked-in and compressed compressed air, directing of the compressed and dehumidified medical compressed air in the compressed air supply line (10), directing the medical compressed air to at least one sensor (14, 15, 16, 17, 18, 19), registering at least one parameter of the compressed and dehumidified medical compressed air with the at least one sensor (14, 15, 16, 17, 18, 19), characterized in that the compressed air directed to the at least one sensor (14, 15, 16, 17, 18, 19) and dehumidified medical compressed air is led to the at least one sensor (14, 15, 16, 17, 18, 19).
    [13]
    Method according to claim 12, characterized in that the medical compressed air is humidified in that water, in particular gaseous water as water vapor, diffuses through a semi-permeable water-permeable membrane.
    [14]
    A method according to claim 13, characterized in that water diffuses from a second space (23) through the membrane into a first space (22) with the medical compressed air.
    [15]
    Method according to claim 14, characterized in that gas, in particular air (32) with a substantially constant relative humidity, is available in the second space (23), in particular in the second space (23) and a saturated water-salt solution (24) is available and the water from the water-salt solution (24) evaporates into the gas.
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    同族专利:
    公开号 | 公开日
    NL2005844C2|2014-06-11|
    DE102010014222A1|2011-10-13|
    DE102010014222B4|2019-03-21|
    引用文献:
    公开号 | 申请日 | 公开日 | 申请人 | 专利标题
    US4025412A|1975-12-04|1977-05-24|General Electric Company|Electrically biased two electrode, electrochemical gas sensor with a H.sub.2|
    GB1591372A|1976-08-27|1981-06-24|British Steel Corp|Gas monitors|
    FR2727750B1|1994-12-06|1997-01-10|France Prod Oxygenes Co|PROCESS AND DEVICE FOR THE PREPARATION OF MEDICAL QUALITY AIR|
    DE19717056C1|1997-04-23|1998-05-14|Draegerwerk Ag|Electrochemical sensor for measuring gas concentrations|
    US20030194351A1|2002-04-15|2003-10-16|Tuomela Stephen D.|Sodium chloride solution humidified sensor|DE102017005011B3|2017-05-24|2018-09-20|Drägerwerk AG & Co. KGaA|Monitoring device for a plant for generating medical compressed air|
    DE102021111431A1|2020-06-29|2021-12-30|Dräger Safety AG & Co. KGaA|Surveillance system|
    法律状态:
    2016-09-14| PD| Change of ownership|Owner name: DRAEGER MEDICAL HOLDING GMBH; DE Free format text: DETAILS ASSIGNMENT: VERANDERING VAN EIGENAAR(S), SAMENVOEGEN; FORMER OWNER NAME: DRAEGER MEDICAL GMBH Effective date: 20160614 |
    2016-09-14| HC| Change of name(s) of proprietor(s)|Owner name: DRAEGER MEDICAL GMBH; DE Free format text: DETAILS ASSIGNMENT: VERANDERING VAN EIGENAAR(S), VERANDERING VAN NAAM VAN DE EIGENAAR(S); FORMER OWNER NAME: DRAEGER MEDICAL HOLDING GMBH Effective date: 20160614 |
    2021-08-04| MM| Lapsed because of non-payment of the annual fee|Effective date: 20210101 |
    优先权:
    申请号 | 申请日 | 专利标题
    DE102010014222|2010-04-08|
    DE102010014222.0A|DE102010014222B4|2010-04-08|2010-04-08|Compressed air monitoring device|
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