• 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:
    A pressure holding device (1) for closed heating, solar or cooling circuits, comprises at least one expansion vessel (2) and a suspension device (3). The expansion vessel (2) has a liquid receiving chamber, which can be connected via a connecting line to a heating, solar or cooling circuit, and a gas chamber. The expansion vessel (2) also has a suspension (21). The suspension device (3) is designed such that it can receive the suspension (21) of the expansion vessel (2). The suspension device (3) further comprises a weight measuring device (31).
    公开号:CH713883A2
    申请号:CH00648/18
    申请日:2018-05-24
    公开日:2018-12-14
    发明作者:Thesing Christian；Scherrer Alain；Schürch Martin
    申请人:Imi Hydronic Engineering Int Sa；
    IPC主号:
    专利说明:

    Description: The present invention relates to a pressure-maintaining device for closed heating, solar or cooling circuits with a weight measuring device for suspended expansion vessels.
    It is a fact known in the art that heating, solar or cooling systems to compensate for the temperature-dependent volume fluctuations must be equipped with a compensation system that takes both the recording and return of the resulting expansion water, as well as the task of pressure maintenance. The excess volume formed by thermal expansion is ideally removed from the circuit at substantially constant pressure and, vice versa, when the volume of water is reduced by cooling, recycled. It is known, for the purpose of efficient pressure maintenance in a pressure holding device, which has at least one vessel foot to integrate into the vessel foot a weight measurement for determining the liquid level in the liquid receiving chamber. However, this technique is limited to relatively large pressure holding devices, especially for commercial use, for example, for heating circuits with high heating power of 200kW and more. In addition, this technique allows a very low modularity of the pressure holding device and leads to an increased installation effort.
    By the present invention, a pressure-holding device of the generic type is to be improved so that it is optimized in terms of modularity and handling, at the same time a compact and cost-effective design is achieved.
    The problem underlying the invention is achieved according to the invention by a pressure-retaining device, as specified by the features of independent claim 1. Further advantageous aspects emerge from the features of the dependent claims.
    The essence of the invention consists in the following: [0006] A pressure-maintaining device for closed heating, solar or cooling circuits comprises at least one expansion vessel and a suspension device. The expansion vessel has a liquid receiving chamber, which can be connected via a connecting line to a heating, solar or cooling circuit, and a gas chamber. The expansion vessel also has a suspension. The suspension device is designed such that it can receive the suspension of the expansion vessel. The suspension device further comprises a weight measuring device.
    In particular, the expansion vessel is held by the suspension device. It can be designed such that the suspension of the expansion vessel can be suspended in the suspension device and optionally with other guide means, such as a guide rail, can be performed. The suspension device has, in particular, a hook on which the expansion vessel can be suspended and optionally held in position with fastening means on the weight measuring device or on the hook in order to prevent accidental falling out of the expansion vessel from the suspension device.
    In particular, the weight measuring device is integrated in the suspension device.
    Advantageously, the pressure holding device already has a secondary support in order to accommodate a second expansion vessel -the secondary vessel. This secondary vessel can be present at the first start-up as well as subsequently added.
    The weight measuring device is in particular designed such that the weight measurement can be transmitted to an evaluation unit or to a control device, wirelessly or via a wire connection.
    The weight measuring device is used to determine the Flüssigleitsstandes in the Flüssigleitsaufnahmekammer. Deviations from the desired operating parameters can be automatically displayed and further processed (for example, disconnection of the heating systems during fault operation).
    The inventive device leads to a reduced installation and commissioning technical effort compared to known devices, since a ready-mounted pressure holding device can be delivered, in which all components of the pressure holding device can already be factory mounted and calibrated and only a connection and commissioning required by the end customer. In this case, the expansion vessel for transport to the hanger or on the stand to be mounted and hung before the start (sliding) in the hanger.
    The particular arrangement of the weight measuring device in the suspension of the inventive device also allows the use of expansion vessels of smaller dimensions, which are much more comfortable to use and their installation costs are simplified and suitable for smaller heating, solar or cooling circuits as large expansion vessels according to the prior art. In addition, the replacement of the expansion vessels can be simplified by the new arrangement of the weight measuring device. The weight in the empty state of the vessel for the purpose of calibration (zero setting) can also be determined at the factory and taken into account during assembly and / or commissioning without having to operate much effort. For example, eliminates the on-site calibration of the device (empty weight of the expansion vessel). Alternatively, for example, when using an evaluation unit or a controller for controlling the gas supply or gas discharge, the calibration may be input by the installer directly into the evaluation unit or a controller. However, the information about the empty weight of the expansion vessel can also be stored in a data memory on the expansion vessel and transmitted via a wire connection or a wireless connection to the evaluation unit or to the control device. In an alternative variant, the calibration on site at the control unit before filling the expansion vessel, by weight measurement of the empty expansion vessel to the weight measuring device and storage of the empty weight in the evaluation unit or the control device, take place. During delivery, the arrangement of the weight measuring device allows a calibration, which has already been done at the factory and therefore facilitates the installation and / or commissioning considerably.
    The arrangement of the weight measuring device also allows high flexibility, since it allows the use of one or more expansion vessels, and the use of expansion vessels of different dimensions, without large installation and / or commissioning effort. A retrofitting of a pressure-maintaining device, which has only one expansion vessel, with a second expansion vessel is significantly simplified compared to previous devices.
    Furthermore, thanks to this arrangement existing vessels, in particular discus vessels, can be used, optionally with attachment of a suspension, without further development and validation effort. The validation processes can be completely eliminated when using the device according to the invention.
    In particular, the expansion vessel is a membrane expansion vessel. In this case, there is a membrane in the expansion vessel, which separates the liquid chamber from the gas chamber. The membrane may be formed as a half-membrane or as a bubble membrane. The half-membrane is usually attached gas-tight and liquid-tight on the side wall of the expansion vessel. The bubble membrane is gas- and liquid-tight connected to the liquid connection and expands when liquid enters the expansion vessel in the gas chamber. The use of the bubble membrane also allows the liquid side aeration of the expansion vessel.
    In particular expansion vessels in the form of a disk facilitate handling during assembly of the pressure-holding device.
    In the entire application is to be understood as gas in particular air.
    The various units (expansion vessel, weight measurement, etc.) can also be equipped with quick connectors to accomplish a simple and fast installation and / or commissioning with the least possible tool. Such a technique is also known by the term "plug-and-play".
    Not only in the initial installation, but also in a subsequent expansion or retrofitting with additional expansion vessels, the device is particularly advantageous in this context. Same benefits arise in the maintenance or replacement of components of the pressure maintenance device.
    In a further embodiment of the pressure holding device, the pressure holding device has a stand, which comprises the suspension device.
    If the pressure holding device has a secondary support to accommodate a second expansion vessel - the secondary vessel - (for example, subsequently), the secondary support is in particular (orts) firmly connected to the stand.
    The use of a stand allows the mounting of the expansion vessel on the stand, which is mounted for example on a frame on the floor. The stand again increases the flexibility of the device by a plurality of, in particular two expansion vessels can be mounted in a simple manner, or easily another expansion vessel can be retrofitted.
    In another embodiment of the pressure holding device, the suspension device is arranged on the longitudinal side of the stator and designed such that the suspension of the expansion vessel can be accommodated.
    In another variant of the pressure holding device, the suspension device is integrated with the weight measuring device on the stand. In particular, the suspension device is integrated with the weight measuring device in the stand. These arrangements facilitate the assembly of the pressure holding device and lead to a particularly compact design of the pressure holding device.
    In a further embodiment of the pressure holding device, the suspension of the expansion vessel is a one-point suspension. A one-point suspension is a suspension that is suspended from the suspension device at one point.
    The use of a one-point suspension simplifies the handling of the expansion vessels in the assembly of the pressure holding device.
    In a further embodiment of the pressure-retaining device, the pressure-retaining device is configured such that the expansion vessel can be suspended, in particular with the one-point suspension, into the suspension device of the upright.
    In particular, the expansion vessel can be held by further fastening means in position on the weight measuring device.
    The simple mounting of the expansion vessel is a simplification for the installer. In particular, the expansion vessel for transport to the hanger or on the stand can be fixed and released before commissioning and (sliding) hooked into the suspension.
    In an additional embodiment of the pressure-retaining device, the stand is designed such that it can accommodate at least two expansion vessels, namely a primary vessel and a secondary vessel.
    In an additional embodiment of the pressure holding device, the stand comprises a suspension devices to the primary vessel and a (further) suspension, which is fixed in particular on the stand to accommodate the secondary vessel can.
    In particular, both expansion vessels in this embodiment have the same configuration in size and shape.
    In this case, one or two weight measuring device (s) can be used.
    In a further embodiment of the pressure holding device, the suspension device and the secondary support are arranged such that the secondary vessel relative to the primary vessel can be attached to the stand and the gas chambers of the two Ausdehnunsgefässe can be connected and the liquid inputs of the liquid receiving chambers of the two expansion vessels in the same position , with respect to the longitudinal axis of the stand. In other words, the liquid inputs are at the same level, such that the liquid inputs have the same pressure point.
    In this case, the secondary vessel relative to the primary vessel (mirrored) attached to the stand and gas side connected to the primary vessel.
    This embodiment has the advantage that a single weight measuring device is necessary to determine the water level in both expansion vessels. Because the liquid connection of both expansion vessels takes place at the same pressure point, the principle of the communicating columns applies here, so that the same level always sets in both vessels. This is ensured by the special design of the device, since an incorrect installation of both expansion vessels is excluded by the inventive device.
    However, the stand can also be designed such that both expansion vessels are connected to the weight measuring device, wherein each expansion vessel can also be connected in each case to a weight measuring device. So the weight measurement of both expansion vessels can be done.
    In a further alternative embodiment of the pressure holding device, the stand comprises two suspension devices in order to be able to receive one expansion vessel each.
    In another alternative embodiment pressure-retaining device, the suspension device for the primary vessel and the suspension for the secondary vessel are arranged on opposite longitudinal sides of the stator.
    The longitudinal sides of the stand are the sides which extend along the longitudinal axis of the stand.
    The special arrangement of the weight measuring device (s) also allows a high modularity of the device, since the use of multiple expansion vessels, as well as the use of expansion vessels of different dimensions is made possible without extensive additional effort. A retrofitting of a pressure holding device, which has only one expansion vessel, with a second expansion vessel is significantly simplified compared to previous devices.
    In a further embodiment of the pressure holding device, the pressure holding device comprises a supply line which is connected to the gas chamber, a gas control unit which is connected via the supply line to the gas chamber and gas, in particular air, can conduct into the gas chamber or from the gas chamber.
    In an additional embodiment of the pressure holding device, the gas control unit comprises a pressure measuring unit for measuring the gas pressure at a line connected to the gas chamber, a pump for supplying gas in particular via the supply line into the gas chamber, a controllable valve for discharging gas, in particular via the supply line from the gas chamber (in particular into the atmosphere) and a control device.
    The inventive pressure holding device with the gas control unit allows a particularly efficient pressure maintenance and volume compensation for heating, solar or cooling circuits.
    In an additional embodiment, the pressure holding device has a safety valve, which is arranged on a line connected to the gas chamber of the expansion vessel, in particular on the supply line.
    The safety valve is advantageous if the pump supplies air into the gas chamber by a fault until a pressure at the limit or above the safety pressure of the expansion vessel is reached.
    In another alternative embodiment of the pressure holding device, the gas control unit is designed such that the gas pressure that can be generated is below the permissible pressure of the expansion vessels.
    In another further embodiment of the pressure-retaining device, the expansion vessels have the shape of a disk.
    Such expansion vessels in the form of a disk are easier to handle in comparison with other forms for the installer and facilitate the suspension of the expansion vessel to the hanger and a reliable weight measurement by the weight measuring device of the hanger.
    In a further embodiment, the pressure holding device according to the invention further comprises a make-up for supplying liquid in the closed heating, solar or cooling circuit.
    By the make-up volume loss can be compensated by the addition of liquid from the outside via a make-up line. Such a loss of volume may be due to the elimination of gas or other discharges such as micro-fluid leakage from the heating, solar or cooling fluid.
    The amounts of water and pressures required for proper operation per operating state can be easily maintained and controlled by the method according to the invention.
    The variants and features mentioned and described herein may also be performed in combination of two or more variants or features and these combinations are also encompassed by the present invention, provided that such combinations are not mutually inconsistent.
    In the following, the pressure holding device according to the invention will be described in more detail with reference to the accompanying drawings with reference to embodiments. It shows:
    1 shows a side view of the inventive pressure holding device with an expansion vessel.
    FIG. 2 shows a further side view of the pressure holding device according to the invention with an expansion vessel; FIG.
    3 is a front view of the pressure holding device according to the invention;
    4 shows a side view of the pressure holding device according to the invention with two expansion vessels;
    5 is a detailed side view of the embodiment of the inventive pressure-holding device according to FIG. 2;
    6 shows a side view of a further embodiment of the pressure-retaining device according to the invention;
    7 shows a cross-sectional view from above of a suspension device according to the invention with integrated weight measuring device according to FIG. 6;
    8 shows a lateral cross-sectional view of a suspension device according to the invention with integrated weight measuring device according to FIG. 6.
    An embodiment of such a pressure holding device is shown in FIG. 1 of the accompanying drawings.
    The pressure holding device 1 in Figs. 1 and 2 comprises an expansion vessel 2 having a liquid receiving chamber and a gas chamber separated by a membrane (not shown in the drawings). The liquid receiving chamber can be connected via a connecting line 4 to the heating, solar, or cooling circuit. The expansion vessel 2 also has a suspension, which is designed as a one-point suspension 21.
    The pressure holding device 1 further comprises a frame 51 with a stand 5. In the stand 5, a suspension device 3 is integrated. The suspension device 3 is arranged laterally on the upright 5 (on the longitudinal side of the upright 5) and is designed such that the suspension 21 of the expansion vessel 2 can be received. The suspension devices 3 further has a weight measuring device 31, which is integrated with the suspension device 3 in the stator 5.
    1 and 2 further comprises a supply line 6 which is connected to the gas chamber and a gas control unit comprising a pressure measuring unit 71, a pump 72, a controllable solenoid valve 73 and a control device 74. The gas control unit Connected via the supply line 6 to the gas chamber to conduct in operation air into the gas chamber or from the gas chamber.
    The pump 72 serves to supply air via the supply line 6 into the gas chamber and the controllable valve 73 serves to discharge air from the gas chamber.
    The pressure measuring unit 71 determines the gas pressure (air pressure) which prevails in the gas chamber and gives corresponding feedback to the control device 74. The control device 74 in turn controls the pump 72 or the controllable solenoid valve 73 by the gas pressure in the gas chamber of the expansion vessel 2 to regulate.
    In the embodiment shown here, the pressure holding device 1 also has a make-up 41 for supplying liquid in the closed heating, solar or cooling circuit.
    For example, by the elimination of gas or other excretions loses the liquid contained in the heating, solar or cooling circuit liquid volume. This volume loss can be compensated by supplying liquid from the outside via a make-up line 41. The make-up line 41 opens in the illustrated device in the connecting line 4, so that the added liquid enters the liquid-conducting heating, solar or cooling circuit. But it can also be arranged in many other ways and open, for example, via another line in the liquid-conducting heating, solar or cooling circuit. The make-up line 41 may be provided with a flow meter and a shut-off device, which is preferably a controllable solenoid valve. The make-up can also be controlled via the control unit 74.
    Fig. 3 shows a front view of the inventive pressure-retaining device, wherein in this view, either one or two expansion vessels may be present.
    Fig. 4 shows a further, inventive embodiment of the pressure holding device, in which the stator 5 is formed such that it can accommodate two expansion vessels 2. In particular, the stand 5 comprises a suspension device 3 comprising a weight measuring device 31, to which the primary expansion vessel 200 is suspended via the one-point suspension 210. The second expansion vessel 201 - the secondary expansion vessel -, however, is mounted via the one-point suspension 211 on the longitudinal axis of the stator 5 opposite to the primary expansion vessel 200 with fastening means (secondary mount 24).
    Fig. 5 shows a detailed view of the embodiment of Figs. 1 and 2 in which the one-point suspension 21 and the suspension device 3 with integrated weight measuring device 31 can be seen. In FIG. 5, it can also be seen that the expansion vessel 2 hangs on a hook 22 on the stand 5. The hook 22 is connected to the weight measuring device 31 and allows the measurement of the weight of the expansion vessel.
    Fig. 6 shows a further embodiment of the inventive suspension device 3. In which the weight measuring device 31 of the suspension device 3 is integrated in the stator 5. Furthermore, this embodiment comprises a fixation 23 to fix the expansion vessel 2 during transport. The pressure holding device already has a secondary holder 24 in order to subsequently be able to receive a second expansion vessel (the secondary vessel).
    Fig. 7 shows a cross-sectional view from above and Fig. 8 is a side cross-sectional view of the suspension device 3 with integrated weight measuring device 31 of FIG. 6 along the line K-K. The suspension is located in the stand 5 and includes a hook 22 for receiving the one-point suspension of the expansion vessel. In these figures, the measuring cell 32 can be seen, which is located in the weight measuring device 31 and which is connected directly to the hook 22.
    For the function of this pressure holding device 1 is to say that with increasing pressure in the liquid-carrying circuit (heating) for the time being, the resulting expansion water is received in the liquid receiving chamber of the expansion vessel 2. The additional liquid volume presses on the membrane in the expansion vessel 2 and reduces the volume of the gas chamber. This causes an increasing gas pressure in the gas chamber.
    For example, when the target pressure in the gas chamber is exceeded by 0.2 bar, the controllable solenoid valve 73 opens (controlled by the control unit 74) and allows air to flow out of the gas chamber. As a result, the air pressure drops again to a predetermined value, for example, by 0.1 bar, so closes the solenoid valve 73. If the pressure in the circuit, for example by cooling the liquid, the pressure holding device 1 releases from its stored in the expansion vessel 2 volume of water. As a result, the diaphragm which separates the fluid accommodating chamber and the gas chamber moves, and the air pressure in the gas chamber of the expansion vessel 2 decreases. If the air pressure in the gas chamber drops, for example, by 0.2 bar below the setpoint value, the air pump 72 is switched on via the control unit 74. The pump 72 delivers air from the ambient air into the gas chamber of the expansion vessel 2 and thus compensates for the decreasing pressure in the system. If the pressure in turn increases by a fixed value while the pump 72 delivers air into the gas chamber, for example by 0.1 bar, then the pump 72 is switched off again. The pressure in the liquid-carrying circuit is thereby kept largely constant. The pressures given here are mentioned by way of example and can be adapted as required to the specific application.
    Advantage of this device is the reduced installation and commissioning technical effort compared to known devices, since a fully assembled pressure holding device can be delivered, in which all components of the pressure holding device can already be factory mounted and calibrated and only a connection and a startup at End customer is required. In addition, existing items can be used to make the device modular and very adaptable. This creates a cheap and space-saving device whose costs are further reduced by the potential use of existing components without additional validation effort. In operation, the device according to the invention is maintenance-free and the replacement of components is simpler compared to known systems.
    权利要求:
    Claims (13)
    [1]
    claims
    1. pressure holding device (1) for closed heating, solar or cooling circuits comprising at least one expansion vessel (2) and a suspension device (3), wherein the expansion vessel (2) a liquid receiving chamber, which via a connecting line (4) to a heating , Solar or cooling circuit can be connected, and a gas chamber, wherein the expansion vessel (2) further comprises a suspension (21) and the suspension device (3) is designed such that they receive the suspension (21) of the expansion vessel (2) can and the suspension device (3) further comprises a weight measuring device (31), and the pressure holding device (1) comprises a supply line (6) which is connected to the gas chamber, a gas control unit, which via the supply line (6) is connected to the gas chamber and gas, in particular air, into the gas chamber or from the gas chamber, wherein the gas control unit, a pressure measuring unit (71) for measuring d gas pressure on a line connected to the gas chamber, a pump (72) for supplying gas in particular via the supply line (6) into the gas chamber, a controllable valve (73) for discharging gas, in particular via the supply line (6) from the Gas chamber and a control device (74).
    [2]
    2. Pressure holding device (1) according to claim 1, wherein the pressure holding device (1) has a stand (5), which comprises the suspension device (3).
    [3]
    3. Pressure holding device (1) according to claim 2, wherein the suspension device (3) on the longitudinal side of the stator (5) and arranged such that the suspension (21) of the expansion vessel (2) can be accommodated.
    [4]
    4. Pressure holding device (1) according to claim 2 or 3, wherein the suspension device (3) with the weight measuring device (31) on the stand (5) is integrated.
    [5]
    5. Pressure holding device (1) according to one of claims 1 to 4, wherein the suspension (21) of the expansion vessel (2) is a one-point suspension.
    [6]
    6. Pressure holding device (1) according to one of claims 1 to 5, wherein the pressure holding device (1) is designed such that the expansion vessel (2) in particular with the one-point suspension in the suspension device (3) of the stator (5) can be suspended is.
    [7]
    7. Pressure holding device (1) according to one of claims 2 to 6, wherein the stand (5) is designed such that it can accommodate at least two expansion vessels, a primary vessel (200) and a secondary vessel (201).
    [8]
    8. Pressure holding device (1) according to one of claims 2 to 7, wherein the stand (5) comprises a suspension devices (3) to the primary vessel (200) and a secondary support (24) to accommodate the secondary vessel (201) can.
    [9]
    9. Pressure holding device according to claim 8, wherein the suspension device (3) for the primary vessel (209) and the suspension for the secondary vessel (201) on opposite longitudinal sides of the stator (5) are arranged.
    [10]
    10. Pressure-holding device according to claim 9, wherein the suspension device (3) and the secondary support (24) are arranged such that the secondary vessel (201) relative to the primary vessel (200) on the stand (5) can be attached and the gas chambers of the two Ausdehnunsgefässe ( 200, 201) and the fluid inlets of the fluid receiving chambers of the two expansion vessels (200, 201) are in the same position with respect to the longitudinal axis of the upright (5).
    [11]
    11. Pressure holding device (1) according to one of claims 1 to 10, wherein the pressure holding device (1) has a safety valve, which is arranged on a with the gas chamber of the expansion vessel (2) connected line, in particular on the supply line (6).
    [12]
    12. Pressure holding device (1) according to one of claims 1 to 11, wherein the pressure holding device (1) further comprises a make-up (41) for supplying liquid in the closed heating, solar or cooling circuit.
    [13]
    13. Pressure holding device (1) according to one of claims 1 to 12, wherein the gas control unit is designed such that the producible gas pressure is below the permissible pressure of the expansion vessel (2).
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    同族专利:
    公开号 | 公开日
    EP3410022A1|2018-12-05|
    DE202018002498U1|2018-07-19|
    CH713883B1|2021-11-15|
    引用文献:
    公开号 | 申请日 | 公开日 | 申请人 | 专利标题
    DE4320333C2|1993-06-21|2002-11-14|Jens Pannenborg|Method and device for securing system pressures in a closed water cycle|
    DE19921389A1|1999-05-10|2000-11-23|Jens Pannenborg|Method for monitoring and regulating water level and header pressure in membrane expansion tanks for boilers has a balancing crosspiece fitted on an axle fastened in brackets and a spring to determine maximum possible load.|
    DE202005010605U1|2004-07-13|2005-11-03|Vaillant Gmbh|Inspection apparatus for expansion tank for heaters, has pressure sensor responding to weights of tank as well as stored fluid in it to indicate functioning of tank as well as abrasion of diaphragm inside tank|
    DE102004040806A1|2004-08-24|2006-03-02|Pröpper, Uwe|Pressure expansion vessel for equalizing volume fluctuations in heat transfer fluid, has flexible diaphragm between precompression chamber and operating chamber, and has weighing device|DE102020207054A1|2020-06-05|2021-12-09|Robert Bosch Gesellschaft mit beschränkter Haftung|Pressure expansion tank, heating system with pressure expansion tank, monitoring device for monitoring them and methods for monitoring them|
    DE102020207057A1|2020-06-05|2021-12-09|Robert Bosch Gesellschaft mit beschränkter Haftung|Method for operating a monitoring device for monitoring a heating system, monitoring device and heating system with the monitoring device|
    法律状态:
    优先权:
    申请号 | 申请日 | 专利标题
    EP17174034.3A|EP3410022A1|2017-06-01|2017-06-01|Pressure maintaining device|
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