• 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:
    In order to ensure accurate filling of a refrigerant to a cooling system (6) via a hose (4), according to the invention, temperature (Ts and Te) and pressure sensors (Ps and Pe) are mounted at the inlet and / or outlet side of the hose (4). . From these sensors, a signal can be sent to a computer (11) which can calculate the amount pumped through the hose (4), thereby controlling it via a valve (5). In this way it is achieved that the quantity charged is determined on the basis of its density, and not as previously used solely on the basis of a weight control.
    公开号:DK201300156A1
    申请号:DK201300156
    申请日:2013-03-18
    公开日:2014-09-25
    发明作者:Louis B Cording；Månsson Claes
    申请人:Agramkow Fluid Systems As；
    IPC主号:
    专利说明:

    PROCEDURE FOR REFILLING REFRIGERANT The prior art
    BACKGROUND OF THE INVENTION The invention relates to a method for loading a refrigerant onto a cooling system via a conduit, such as a hose, which is applied to the cooling end at the inlet end and connected to the cooling system at the outlet end, and wherein the filling is controlled by a meter on the hose end, which controls a valve at the outlet end of the hose. , an equipment therefor, and its use.
    Such a procedure takes place in connection with servicing and repair of refrigeration systems.
    When a gaseous refrigerant is used, there are special physical conditions that apply and thus conditions that must be taken into account when a given amount of gaseous refrigerant is to be filled.
    Known methods deal with filling by weight, that is, weighing the filled quantity continuously during filling.
    Examples of such filling are known from JP 830.39 A and US 4,470,265 A, both of which describe filling by weight of the refrigerant.
    However, this filling method suffers from a considerable inaccuracy due to the fact that the filling takes place via a hose whose internal volume depends on both its length and its diameter and that the refrigerant supply pressure, its temperature and the ambient temperature influence the density of the medium. This is measured in weight per day. unit volume. This makes it difficult to add an exact amount of refrigerant to the refrigerator.
    In addition, the pressure may fall through the hose, as it will normally be higher at the inlet end than at the outlet end and hence its density is higher at the inlet end than at the outlet end during filling.
    These conditions make it difficult to load the correct and precise amount of refrigerant on a refrigeration system.
    The object of the invention
    SUMMARY OF THE INVENTION It is an object of the invention to remedy this deficiency in the known refrigerant loading methods on a cooling system.
    This is achieved by a method according to the invention, in which the density of the refrigerant is continuously monitored during the filling, to obtain an accurate filling of the cooling system. This ensures, in a simple way, the highest possible accuracy and thus the assurance that precisely the desired refrigerant quantity is filled regardless of the physical state of the refrigerant.
    By, as defined in claim 2, continuously recording, that is, measuring the temperature and pressure of the filling, an appropriate software will be able to calculate, compensate, so that an accurate amount of refrigerant is filled.
    By measuring, as referred to in claim 3, at both the inlet and / or outlet end of the filling hose, accurate calculation and thus control of the filling can be ensured.
    By using sensors for both temperature and pressure at both the inlet and outlet end of the hose, as claimed in claims 4 and 5, a computer with an appropriate software will be able to compensate and control the filling via a flow valve.
    Finally, as claimed in claim 6, it is convenient to use the method for controlling and controlling the filling of gaseous refrigerant.
    The drawing
    An example of an embodiment of the method and an apparatus therefor will be described in more detail below with reference to the drawing, in which: FIG. 1 shows a principle sketch of the known filling method and FIG. 2 shows the method according to the invention.
    Description of an embodiment In FIG. 1 is an example of a known method of filling illustrated by a system drawing showing the refrigerant in a pressure bottle 1 connected to a pump 2 which, via a conduit 2a, presses the agent through a flow meter 3 to a hose 4 which may have a length of several meters.
    At the outlet end of the hose 4 is fitted a flow valve 5 which via a signal 5a from the meter 3 controls the gas supply via a line 6a to the cooling system 6 to be filled with the refrigerant.
    This method is not very accurate, since the filling quantity is based solely on a meter 3 and does not take into account the refrigerant density, which will depend on the temperature of the agent itself, the temperature around the plant, its pressure and the volume of the hose.
    FIG. 2 shows an example of a plant according to the invention, comprising a hose 4, which is fed to the refrigerant under pump pressure via line 2a and with a flow valve! 5 for controlling the refrigerant via a conduit 6a for a cooling system not shown.
    In order to ensure an accurate filling, sensors are mounted according to the invention. These sensors for temperature T and pressure P are mounted at both the inlet end and the outlet end of the hose 4. These sensors are marked with Ts and Ps for the inlet sensors and Te and Pe for the outlet sensors respectively.
    The sensors send a signal to a computer 11 via signal transducers 7a and 9a for the inlet part and 8a and 10a for the outlet part of the hose.
    Hereby, software in the computer 11 can calculate the density of the gas flow through the hose 4 and thus compensate the amount passing through the valve 5, thus ensuring that the exact amount of refrigerant is supplied regardless of its physical state and whether the refrigerant is gaseous or liquid. form.
    When a predetermined amount has passed through the valve 5, signal 5a is given to the valve 5, which can thereby block the flow and thus the filling to the cooling system.
    This makes the filling more precise as it ensures the exact amount of refrigerant and thus the most economical maintenance and operation of a refrigeration system of this kind.
    In practice, the signal transducer will be gathered around the hose 4, which will thus be the carrier thereof, while conducting the refrigerant via the hose interior. At the outlet end of the hose, where the valve 5 is mounted, connecting means between the filling part and the cooling system will be mounted in a generally known manner.
    权利要求:
    Claims (6)
    [1]
    A method of loading a refrigerant onto a cooling system via a conduit, such as a hose, which is applied to the means at the inlet end and connected to the cooling system at the outlet end, and wherein the filling is controlled by a meter on the inlet end of the hose which controls a valve at the outlet end of the hose. characterized by. that the density of the refrigerant during the filling is continuously monitored, to obtain a precise filling of the cooling system (8).
    [2]
    Method according to claim 1, characterized in that the monitoring comprises a continuous recording of both the temperature (T) of the refrigerant and its pressure (P) in the hose (4),
    [3]
    Method according to claims 1 and 2, characterized in that both the temperature (T) of the refrigerant and its pressure (P) are continuously recorded at both its inlet (7 and 9) to the hose (4) and / or at its outlet (8 and 10) from the hose (4).
    [4]
    Equipment for measuring and controlling the filling according to claims 1-3, characterized in that both temperature (T) and pressure (P) are measured by sensors (9,10 and 7.8) located at the inlet and outlet ends of the hose (4) respectively. .
    [5]
    Equipment according to claim 4, characterized in that the quantity of the refrigerant is controlled in a computer (11) to which the signals from the temperature (9a and 10a) and the pressure sensors (7a and 8a) are fed, and from which the signal (5a) for controlling the the valve (5) is deleted.
    [6]
    Use of the method according to claims 1-3 as well as the equipment according to claims 4 and 5, characterized in that it is used for controlling the filled refrigerant 10. a cooling system (8) which is supplied to a refrigerant via a hose (4) of variable length and thus volume, taking into account the temperature (T) and pressure (P) of the hose (4).
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    同族专利:
    公开号 | 公开日
    CN104034104A|2014-09-10|
    US9488397B2|2016-11-08|
    CN104034104B|2017-05-24|
    US20140216073A1|2014-08-07|
    EP2762804B1|2016-10-05|
    EP2762804A1|2014-08-06|
    DK178047B1|2015-04-13|
    引用文献:
    公开号 | 申请日 | 公开日 | 申请人 | 专利标题
    US4470265A|1982-05-10|1984-09-11|Gerlach Industries|Refrigerant charging system|
    US5231841A|1991-12-19|1993-08-03|Mcclelland Ralph A|Refrigerant charging system and control system therefor|
    US5758506A|1996-07-03|1998-06-02|White Industries, Llc|Method and apparatus for servicing automotive refrigeration systems|
    US5802859A|1996-12-16|1998-09-08|Hudson Technologies, Inc.|Apparatus for recovering and analyzing volatile refrigerants|
    WO2011049767A2|2009-10-23|2011-04-28|Carrier Corporation|Refrigerant vapor compression system operation|
    US7905095B2|2004-07-16|2011-03-15|Spx Corporation|System for refrigerant charging with constant volume tank|
    JP4124228B2|2005-12-16|2008-07-23|ダイキン工業株式会社|Air conditioner|
    JP4165566B2|2006-01-25|2008-10-15|ダイキン工業株式会社|Air conditioner|
    CN201363976Y|2009-03-11|2009-12-16|耿功业|Full-automatic refrigerant quantitative adding machine|DE102014011051A1|2014-07-22|2016-01-28|Dürr Somac GmbH|Device for filling vehicle air conditioning systems with refrigerant R744|
    DE102014011836A1|2014-08-08|2016-02-11|Dürr Somac GmbH|Device for filling vehicle air conditioning systems with refrigerant R744|
    US11129399B2|2016-08-16|2021-09-28|Messer Industries Usa, Inc.|In-line cryogenic method and system for cooling liquid products|
    CN111981732B|2020-07-24|2021-07-27|中标能效科技（北京）有限公司|Automatic refrigerant filling device and method|
    法律状态:
    优先权:
    申请号 | 申请日 | 专利标题
    DKPA201300065|2013-02-04|
    DK201300065|2013-02-04|
    DK201300156A|DK178047B1|2013-02-04|2013-03-18|Refrigerant filling process|
    DK201300156|2013-03-18|DK201300156A| DK178047B1|2013-02-04|2013-03-18|Refrigerant filling process|
    US14/171,841| US9488397B2|2013-02-04|2014-02-04|Method of charging a coolant|
    EP14388001.1A| EP2762804B1|2013-02-04|2014-02-04|A method of charging a coolant|
    CN201410116575.XA| CN104034104B|2013-02-04|2014-02-07|A Method Of Charging A Coolant|
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