Gas pressure regulation system

Abstract

A gas pressure regulation system for adjusting gas pressure comprising a gas regulator and a regulating device. The gas regulator comprising: a regulator inlet adapted to establish fluid connection with a gas container, so that gas may flow from said container through said regulator; and a regulator outlet, opposite the regulator inlet, adapted for gas flow out from said regulator. The regulating device comprising: a reg. device inlet adapted for receiving gas, an reg. device outlet, opposite the reg. device inlet, adapted for gas flow out from said regulating device; a needle valve adapted for regulating the flow of gas through the regulating device; a motor, connected to said needle valve, said motor being adapted to adjust the position of said needle valve; a pressure sensor adapted to measure, preferably periodically, a gas pressure between the needle valve and the reg. device outlet; and a computing device adapted to receive said gas pressure data from the pressure sensor, and based on said information, control the motor, so that said motor maintains and / or alters the position of the needle valve in accordance with the gas pressure measured by the pressure sensor.

Description

[0001] Gas pressure regulation system

[0002] Field of the invention

[0003] The present disclosure relates to the field of gas regulation and control, more specifically to a gas pressure regulation system for ensuring a variable output pressure from said system ensuring an approximately constant inlet pressure to a point of consumption.

[0004] Background of the invention

[0005] Gas, particularly liquefied petroleum gas (LPG), is widely used for various applications such as heating, cooling, and cooking in environments where a consistent electricity supply is not available or where gas perform the job better. LPG is stored in high-pressure containers, with the majority in liquid form and a small portion in the gas phase. The pressure keeps the LPG in a liquid state, and the vapor is located at the top of the container due to gravity.

[0006] LPG is supplied in pressurized containers because it evaporates quickly at normal ambient temperature and pressure. The containers are typically filled up to 80% capacity only to be able to accommodate for thermal expansion of the liquid. The pressure required to maintain LPG in a liquid state is called vapor pressure. When the LPG evaporates, it draws heat from the surrounding environment through the wetted surface only, as the gas phase part of the LPG container does not transfer heat effectively.

[0007] Gas containers generally have pressures ranging from 0.3 to 16 bar, depending on the gas type and ambient temperature. The maximum gas flow rate from the container varies between 0.7 and 2.0 kg / h, depending on factors such as gas type, ambient temperature, and duration of usage.

[0008] To reduce the high pressure inside the gas container to a usable level, a gas regulator is typically used. The regulator is connected to the gas container and lowers the pressure to a desired supply level for gas appliances. This ensures that a specific gas pressure is delivered from the regulator to the appliance.

[0009] Regulation is commonly achieved in one or two steps using fixed outlet pressure regulators. These regulators are set to a predetermined outlet pressure, often around 30 mbar, although pressures of 37 mbar and 50 mbar are also common depending on the appliance requirements. Fixed outlet pressure regulators are widely used as they provide the necessary pressure for various types of gas appliances.

[0010] There are also adjustable regulators that allow users to adjust the gas pressure to compensate for pressure drops in the pipeline. However, this option is restricted in many countries due to safety concerns, as incorrect inlet pressure adjustments can lead to incomplete combustion and the release of dangerous gases such as carbon monoxide.

[0011] The principle of a gas regulator is to balance the internal force (typically from a spring attached to a diaphragm) against the inlet gas pressure from the container. The outlet pressure is the result of this force differential. However, when the inlet pressure decreases as the LPG container empties, the outlet pressure also drops in fixed outlet pressure regulators where the spring force is pre-set during manufacturing.

[0012] Regulator standards specify a narrow tolerance band for the outlet pressure of fixed regulators, which varies depending on the gas type and the set point pressure.

[0013] An example is the EN16129 standard:

[0014] Pressure charRegulator Regulator reguMaximum downAppliance Appliacteristics of the supply lated pressure stream installasupply presance regulator based pressure mbar tion pressure sure mbar cateon nominal loss gories pressures given in EN 437 Gas bar pd Mg pMp pO mbar pnpm ax Butane 0,3 29 22 35 40 2 29 (28-30) 20 3B and to 3+

[0015] 7,5

[0016] Butane 0,3 50 47,5 57,5 62,5 5 50 57,5 3+ to

[0017] 7,5

[0018] Butane 0,3 112 65 140 145 5 112 60 140 3+ to

[0019] 7,5

[0020] LPG 0,3 29 27 35 40 2 29 (28-30) 25 35 3B / P to

[0021] 16

[0022] LPG 0,3 50 47,5 57,5 62,5 5 50 3B / P to

[0023] 16

[0024] Propane 1 to 30 27 35 40 2 30 25 35 3P

[0025] 16

[0026] Propane 1 to 37 27 45 50 2 37 25 45 3P and Propane 1 to 37 30 45 50 5 37 25 45 3P and

[0027] 16 3+

[0028] Propane 1 to 50 47,5 57,5 62,5 55042,5 57,5 3P

[0029] 16

[0030] Propane 1 to 67 55 80 85 56750 80 3+

[0031] 16

[0032] Propane 1 to 148 105 180 185 5 148 100 180 3+

[0033] 16 a Data taken from EN 437.

[0034] As an example, we see the nominal fixed pressure for LPG is 29 mbar with an allowed tolerance between 27 and 35 mbar and an allowed lock up pressure of max 40 mbar (the max allowed pressure built up in the hose when the gas appliance is shut off).

[0035] The maximum allowed pressure drop between the regulator and the appliance is 2 mbar. However, certain applications, such as caravan and boat installations with long copper or steel piping (5-10 meters) for inbuilt stoves, heaters, and fridges, allow a pressure drop of 5 mbar.

[0036] If the gas consumption exceeds 30 minutes, a maximum capacity of 0.7 kg / h can be withdrawn from a 10 kg / h gas container. This limitation is determined by the maximum energy transfer through the wetted surface of the container. The duration depends on the actual consumption, ambient temperature, and the filling rate of the gas container.

[0037] Let's take a gas grill as an example. The gas container holds gas at a maximum pressure of 16 bar, with a combination of gas and liquefied gas. The gas container is connected to the gas grill through a regulator and a tube for gas transport. When the regulator is opened and consumption begins, the pressure is released, causing new liquid gas to evaporate quickly and turn into the gas phase. This disturbs the equilibrium between the gas and liquid phases in the container, leading to the evaporation of new liquid gas to restore the equilibrium.

[0038] However, it becomes challenging to consume the remaining liquefied gas when the gas container is running low because the pressure drop will cause the gas regulator to close. This can be frustrating, especially when you are in the middle of preparing a meal and suddenly lose a steady supply of gas and heat in your gas grill.

[0039] As a result, gas containers are often exchanged as soon as an unsteady flow is noticed. An alternative solution is to use two or more gas containers with a manual or automatic changeover valve. While cheaper in price, the manual changeover valve requires the user to switch the valve from the empty cylinder to the standby full gas container. This means the valve will not automatically start using the full standby gas cylinder, leading to a potentially unsteady gas flow.

[0040] When the gas container is considered "empty" because the pressure falls below the threshold of 0.7 bar, there is actually still up to 1 kg of liquefied gas left inside the cylinder. The amount of residual gas left in the container when the changeover valve deems it empty also depends on the ambient environment, but typically around 10% of the liquefied gas remains.

[0041] Due to the low pressure and reduced wetted surface area, heat can no longer enter the liquid gas efficiently, making it difficult for the required vaporization to keep up with gas consumption. Therefore, the cylinder is declared "empty," and the changeover valve switches to a new gas container. This results in a significant amount of unconsumed gas being wasted each time a single gas container is exchanged, which adds to the consumer's cost.

[0042] Furthermore, as the gas container runs low, the inlet pressure to the regulator decreases, leading to a decline in the gas outlet pressure from the regulator to the receiving appliance. This can affect the proper functioning of the appliance.

[0043] Some alternative solutions have attempted to maintain a constant output pressure from the regulator by regulating the regulator's membrane itself. However, as the pressure in the cylinder decreases, the output pressure also slightly decreases. This means that the appliances are not supplied with gas at the optimized pressure, resulting in less efficient combustion.

[0044] Given these challenges, the objective of the invention is to provide an improved gas pressure regulation system that ensures an approximately constant gas inlet pressure to the receiving appliance.

[0045] The subject matter claimed herein is not limited to embodiments that solve any disadvantages or that operate only in environments such as those described herein. Rather, this background is only provided to illustrate an example technology area where some implementations described herein may be practiced. of the invention

[0046] On this background, it is an object of the present invention to provide a solution that addresses the challenges of providing an approximately consistent gas pressure, specifically focusing on improving the regulation by removing it from the gas regulator itself.

[0047] According to a first aspect of the invention, the objects laid out in the background section may be achieved by a gas pressure regulation system 100 for adjusting gas flow comprising;

[0048] - a gas regulator 1 comprising;

[0049] • a regulator inlet 10 adapted to establish fluid connection with a gas container 3, so that gas may flow from said container 3 through said regulator, and

[0050] • a regulator outlet 11 , opposite the regulator inlet 10, adapted for gas flow out from said regulator,

[0051] - a regulating device 200 comprising;

[0052] • a reg. device inlet 210 adapted for receiving gas, and

[0053] • an reg. device outlet 211 , opposite the reg. device inlet 210, adapted for gas flow out from said regulating device,

[0054] • a needle valve 4 adapted for regulating the pressure of gas through the regulating device 200,

[0055] • a motor 8, connected to said needle valve 4, said motor 8 being adapted to adjust the position of said needle valve 4,

[0056] • a pressure sensor 5 adapted to measure, preferably periodically, a gas pressure between the needle valve 4 and the reg. device outlet 211 ,

[0057] • a computing device 9 adapted to receive said gas pressure data from the pressure sensor 5, and based on said information, control the motor 8, so that said motor 8 maintains and / or alters the position of the needle valve 4 in accordance with the gas pressure measured by the pressure sensor 5.

[0058] The gas pressure regulation system proposed by this invention offers numerous advantages. By relocating the "fine-tuning" function from the regulator itself to a motorized needle valve placed downstream of the regulator, the needle valve can adeptly adjust the pressure rate to match the consumption of the recipient appliance, thereby maintaining the desired pressure level ensuring the delivered pressure to the inlet of the gas appliance is always correct.

[0059] The fine tuning may occur at several different locations to ensure that all receiving appliances receive the amount of pressure that they need, hereby optimizing the gas pressure regulation system and performance of the appliance.

[0060] The presence of the regulating device 200 also allows for the traditional regulator to be less precise, thereby making it possible for the consumer to choose a cheaper regulator, thereby saving cost. For the system to be self-calibrating by default.

[0061] In an embodiment the pressure sensor 5 is adapted to measure, preferably periodically, more preferred continuously, a gas pressure gas pressure between the needle valve 4 and the reg. device outlet 211.

[0062] The motorized needle valve control is particularly useful in applications where frequent adjustments are needed or when precise and automated control of fluid flow is required. These applications can range from industrial processes to research laboratories, where maintaining accurate flow rates is essential for proper functioning. Or for special gas appliances such as gas fired electrical power generation.

[0063] A control system which may be manual or automated, may control the operation of the motor. In automated systems, sensors, feedback mechanisms, and control algorithms might be employed to precisely regulate the valve's position based on desired flow rates or other parameters.

[0064] In some embodiments, the motorized needle valve may be controlled remotely, such as through a computer interface, a programmable logic controller (PLC), or other automation systems. This allows for remote adjustments and fine-tuning of the valve's position.

[0065] Motorized needle valve control is particularly useful in applications where frequent adjustments are needed or when precise and automated control of fluid flow is required. These applications can range from industrial processes to research laboratories, where maintaining accurate flow rates is essential for proper functioning. Control system which may be manual or automated, may control the operation of the motor. In automated systems, sensors, feedback mechanisms, and control algorithms might be employed to precisely regulate the valve's position based on desired flow rates or other parameters.

[0066] In some embodiments, the motorized needle valve may be controlled remotely, such as through a computer interface, a programmable logic controller (PLC), or other automation systems. This allows for remote adjustments and fine-tuning of the valve's position.

[0067] In an embodiment the regulating device 200 further comprises a second sensor 6, preferably arranged adjacent to the pressure sensor 5.

[0068] In an embodiment the second sensor 6 is a flow sensor. In another embodiment the second sensor 6 is a pressure sensor.

[0069] In an embodiment the pressure sensor 5 and a second sensor 6 are arranged after each other, preferably in series.

[0070] Hereby it is possible to ensure that the system will instruct the needle valve to stop adjusting if no change in pressure is detected. If the flow sensor indicates that the flow is 0, no adjustments should be made to the needle valve.

[0071] In an embodiment, instead of a flow sensor, two pressure sensors are placed one after the other, with different cross-sectional areas. This way, if the flow is 0, both sensors will show the same pressure. However, if there is flow, the pressure sensor in the area with the smaller cross-sectional area will display a higher pressure because the same amount of gas has to be forced through a smaller area.

[0072] In an embodiment the flow sensor may indicate if the flow is 0, in which case no adjustments should be made to the needle valve.

[0073] In an embodiment, instead of a flow sensor, two pressure sensors may arranged one after the other, with different cross-sectional areas. This way, if the flow is 0, both sensors will show the same pressure. However, if there is flow, the pressure sensor in the area with the smaller cross-sectional area will display a higher pressure because the same amount of gas has to be forced through a smaller area. In an embodiment the pressure sensor 5 has a first opening for gas passage, and the second sensor 6 has a second opening for gas passage, said first opening having a size which is different from the size of the second opening, so that when the same amount of gas passes through both openings at the same amount of time, the measured pressure measured by the pressure sensor 5 will be different from the measured pressure measured by the second sensor 6.

[0074] It is to be understood that in the context of this application, the term "size" encompasses various dimensions and measurements, including but not limited to: length, width, depth, area (m2), volume (m3), cross-sectional dimensions, and similar attributes.

[0075] In an embodiment two pressure sensors with different cross-sectional areas are used. When there's no flow, both sensors will indicate the same pressure level. Conversely, if a flow is present, the pressure sensor in the section with the smaller cross-sectional area will display a higher pressure due to the compression of gas through a narrower space.

[0076] In an embodiment the regulating device 200 further comprises an external sensor 7 arranged downstream of the pressure sensor 5, so as to measure a gas pressure at a distance from the reg. device outlet 211 .

[0077] In an embodiment the external sensor 7 is arranged adjacent to a receiving appliance 2.

[0078] In an embodiment the external sensor 7 is a pressure sensor.

[0079] In an embodiment the system 100 further comprises a housing 300. Said housing being adapted to enclose the regulator at least partially 1 and the regulating device 200.

[0080] In an embodiment said housing 300 approximately fully encloses the regulator and the regulating device.

[0081] Hereby the gas pressure regulation system 100 may be provided as one unit, ensuring straightforward and hassle-free handling. Users can effortlessly incorporate this system into pre-existing setups, allowing for the seamless replacement of a conventional regulator with the gas pressure regulation system according to the invention. In an embodiment the regulating device 200 further comprises an enclosure 212 for housing said regulating device 200.

[0082] The reg. device inlet 210 and the reg. device outlet 211 of the regulating device 200 is arranged in said enclosure 212 so as to allow gas flow through the enclosure and the regulating device. Here gas will enter into the enclosure and thus the regulating device through the opening in the reg. device inlet 210 and flow through the regulating device and out through the opening at the reg. device outlet 211 .

[0083] In an embodiment the enclosure 212 at least partially houses the motor 8, the computing device 9, the needle valve 4, the pressure sensor 5.

[0084] In a further embodiment the enclosure 212 also houses the second sensor 6.

[0085] By equipping the regulating device with its own dedicated enclosure 212, the option emerges to position this regulating device at various points within the entire gas supply chain.

[0086] In certain configurations, a preference exists for arranging the regulating device in proximity to the receiving appliance.

[0087] Having the separate enclosure also accommodates scenarios where existing regulators are challenging to replace or where replacement is not the intended course of action. This design flexibility offers an advantage for seamless integration within diverse gas supply setups.

[0088] In an embodiment the regulator outlet 11 of the gas regulator 1 is engaged with and / or directly attached to the reg. device inlet 210 of the regulating device.

[0089] Hereby instead of providing a common housing for housing both the regulator 1 and the regulating device 200, it is possible to simply attach the regulator 1 to the regulating device 200, such as to be arranged in series, hereby allowing gas to flow directly from the gas regulator 1 into the regulating device 200.

[0090] According to a second aspect of the invention a method for controlling a flow of gas in a gas pressure regulation system 100 is provided. The method comprises the steps of: - providing said gas pressure regulation system according to any one of the preceding claims,

[0091] - predefining a pressure setting of the gas regulator 1 depending on the receiving appliance,

[0092] - providing gas flow through said system 100, preferably from a gas container 3 connected to the inlet 10 / 210 / 310,

[0093] - measuring a gas pressure with the pressure sensor 5,

[0094] - transmit said gas pressure data to the computing device 9,

[0095] - based on the data, instruct the motor 8 to maintain and / or alter the position of the needle valve, so as to provide the desired gas pressure flow out of the system 100 to the receiving appliance 2.

[0096] In an embodiment the steps of the method are performed dynamically so as to maintain the pressure of the gas flow out of the regulator within a pre-determined interval, preferably between approximately 20 - 40 mbar, more preferred between approximately 25 - 35 mbar.

[0097] In an embodiment the pressure sensor 5 has a first opening for gas passage, and the second sensor 6 has a second opening for gas passage, said first opening having a size which is different from the size of the second opening, so that when the same amount of gas passes through both openings at the same amount of time, the measured pressure measured by the pressure sensor 5 will be different from the measured pressure measured by the second sensor 6.

[0098] Additionally, there is a shift in the industry towards more focus on the environment and its impact thereon. Therefore a new type of environmentally friendly gas is being introduces. Unfortunately it tends to degrade rubber. Therefore, it is desirable to use thicker membranes (to slow down the degradation process) or even eliminate the traditional regulator altogether.

[0099] Therefor according to a third aspect of the invention a gas pressure regulation system 100b for adjusting gas flow is provided. The system 100b comprising;

[0100] • a housing 300 adapted to enclose at least partially said system 100,

[0101] • an inlet 210 adapted for receiving gas,

[0102] • an outlet 11 , arranged opposite the inlet 210 in said housing 300, adapted for gas flow out from said system, • at least two, preferably at least three, needle valves 4a-c adapted for regulating the flow of gas through the system,

[0103] • a motor 8, preferably at least three motors 8 a-c, connected to said needle valves 4 a-c, said motor 8 being adapted to adjust the position of said needle valves 4 a-c,

[0104] • at least two, preferably at least three, pressure sensors 5a-c adapted to measure, preferably periodically, a gas pressure at different positions in the system 100,

[0105] • a computing device 9 adapted to receive said gas pressure data from the pressure sensors 5 a-c, and based on said information, control the motor(s) 8(a-c), so that said motor(s) 8 (a-c) maintains and / or alters the position of the needle valves 4 a-c in accordance with the gas pressure measured by the pressure sensors 5 a-c.

[0106] In an embodiment the system 100b further comprises a second sensor 6, preferably arranged adjacent to one of the pressure sensors 5 a-c.

[0107] In an embodiment the second sensor 6 is a flow sensor. In another embodiment the second sensor 6 is a pressure sensor.

[0108] Hereby an effective solution may be realized by employing two or three needle valves in series. Choosing only a needle valve without a regulator would necessitate swift system response when the appliance is turned off and consumption ceases. However, by initially incorporating a regulator set, for instance, at 35 mbar (or 60 mbar), the system ensures that the maximum pressure never exceeds the predetermined threshold.

[0109] To address this, a functional requirement emerges for instructing the needle valve to cease adjustments if no pressure change is detected. Ideally, a flow sensor should indicate a flow rate of 0, thereby preventing any adjustments to the needle valve in such cases.

[0110] According to a fourth aspect of the invention a kit of parts for improved gas flow is provided. Said kit of parts comprising:

[0111] - a gas container 3 adapted for providing gas,

[0112] - a receiving appliance 2 adapted for receiving gas, - a gas pressure regulation system 100 OR a gas pressure regulation system 100b for regulating the flow of gas from said gas container to said receiving appliance 2, so as to provide an appropriately constant pressure level of the gas that reaches the receiving appliance 2.

[0113] In an embodiment any of the separate parts; regulator, receiving appliance, gas pressure regulation system, and / or regulating device may be adapted for wireless communication. Preferably with at least each other and / or an external computing device and / or control unit. In an embodiment the control unit may be a Pc, or a Smart phone, or an app, or a ZigBee.

[0114] The control unit may also comprise a communications module for, preferably wireless communication, with a remote server. The control unit may further comprise a power management system for providing power to the one or more processors and / or to the communications module.

[0115] In an embodiment the system comprises a power source connected to power the control unit and / or the regulating device and / or the sensor(s). The power source may be a DC power supply such as a battery or rechargeable battery. The DC power supply and the rechargeable battery may further comprise a renewable energy charging system such as a solar charging system. Alternatively, the system may comprise an electric energy generating and storage system for the operation of the system.

[0116] Preferably, the energy generating and storage system may comprise: a) electric power low-voltage generating means for intrinsically safe operation; b) rechargeable energy storage means for storing energy; c) energy storage management means for the controlled charging of the energy storage means; d) energy management means to control the release of the stored energy in the energy storage means; and e) energy measurement means to ascertain the amount of energy available from the energy storage means. The rechargeable energy storage means may be a battery.

[0117] The control unit and / or any part of the system may be loT and / or wirelessly connected to and / or controlled by a cloud-based control system / program and / or by an IfTTT-rule run by an app or loT system. In an embodiment the system may further comprise a remote storage medium for receiving and storing data and information from the system. The remote storage medium may be any one or more of: i) a server connected to the private or public wireless network; or ii) a cloud storage medium connected to the private or public wireless network. The remote storage medium may allow the user to access archived data and information from the system.

[0118] According to an embodiment the control unit comprises a programmable computing part for calculating a setting of the actuating means from the sensor signal and / or transmitting this to said actuating means as the instruction signal.

[0119] The invention described herein offers a versatile solution applicable to a wide range of gases and liquids used within various contexts. This innovation accommodates not only liquefied petroleum gas (LPG) and natural gas, but also extends to encompass other pressurized liquids such as propane, butane, methane, ethane, and diverse forms of gases like hydrogen, nitrogen, and oxygen. These examples of gases and liquids commonly utilized within gas containers demonstrate the adaptability of the invention to different environments and applications, enhancing its utility and value across a spectrum of scenarios.

[0120] It is to be understood that many different optimal gas pressures are available, and the invention is not limited to a specific pressure point. Throughout this disclosure the standard of 30 mbar is used as an example, as this is a general pressure point for common gas appliances.

[0121] The system according to the invention dynamically adjusts the spring force of the regulator, based on real time gas pressure information collected by the two sensors. Hereby the given inlet pressure to the gas appliance is optimized to serve best possible the design pressure of said appliance, i.e. 30 bar.

[0122] The desired gas pressure aimed at i.e. 30 mbar may be predefined in the control unit settings. This set pressure point value may in one embodiment be amended by the private end user. In another embodiment this set pressure point value may not be changed by the private end user, but may instead be amended by a professional installer, e.g. by a password, if such access has been given. In an embodiment the steps of the method are performed dynamically so as to maintain the pressure of the gas flow out of the regulator within a pre-determined interval, preferably between approximately 20 - 40 mbar, more preferred between approximately 25 - 35 mbar.

[0123] These intervals are preferred in situations where a fixed pressure 30 mbar installation is performed. Similar variations as per EN16129 or other standard interval definitions may be used.

[0124] The invention makes it possible to add a smart controlled actuator that allows to adjust dynamically the spring force up and down - optional, if needed keeping it within the given limits of the standard i.e. 27 - 35 mbar - but enabling the regulator to perform within a more narrow band of pressure and to allow adjusting the spring force to compensate for the falling inlet pressure, air pressure when the gas cylinder liquid level is getting low or to help overcome the real pressure drop in the pipeline of up to 2 - 5 mbar.

[0125] In an embodiment, the invention is also well-suited for application within a natural gas pipeline context, even when the source is not derived from a gas cylinder. Furthermore, this technology can be effectively utilized in propane installations catering to multiple houses. In such cases, our regulator could be seamlessly integrated into a pipeline setup, offering 2 or 3-stage regulation comparable to that found in a natural gas installation.

[0126] Any one or more of the above embodiments or preferred features can be combined with any one or more of the above aspects.

[0127] It is to be understood that both the foregoing general description and the following detailed description are examples and explanatory and are not restrictive of the invention, as claimed. It should be understood that the various embodiments are not limited to the arrangements and instrumentality shown in the drawings. It should also be understood that the embodiments may be combined, or that other embodiments may be utilized and that structural changes, unless so claimed, may be made without departing from the scope of the various embodiments of the present invention. The following detailed description is, therefore, not to be taken in a limiting sense. Brief of the

[0128] The invention will be described in more detail below by means of nonlimiting examples of embodiments and with reference to the schematic drawings, in which:

[0129] Fig. 1a illustrates a schematic example of a gas pressure regulation system 100 according to the invention in an open state.

[0130] Fig. 1b illustrates a schematic example of a gas pressure regulation system 100 according to the invention in a closed state.

[0131] Fig. 2 illustrates a schematic example of an embodiment according to the invention with a gas regulator 1 as an element on its own and a regulating device 200 as an element on its own.

[0132] Fig. 3 illustrates a schematic example of an embodiment according to the invention with a tube 20 adapted to connect the gas regulator 1 and the regulating device 200.

[0133] Figs. 4 a-c shows schematic examples of another embodiment of the gas pressure regulation system 100 according to the invention.

[0134] Fig. 5 shows another schematic example of an embodiment of the gas pressure regulation system 100 according to the invention.

[0135] Fig. 6a illustrates an embodiment of the gas regulation system 100 where the second sensor 6 is a flow sensor.

[0136] Fig. 6b illustrates another schematic example of an embodiment of the system 100 according to the invention, wherein a single pressure sensor 5 is present.

[0137] Fig. 7 illustrates an embodiment of a gas pressure regulation system 100b for adjusting gas pressure. Detailed of the invention

[0138] In the following, embodiments of the invention will be described in further detail. Each specific variation of the features can be applied to other embodiments of the invention unless specifically stated otherwise. Note that for illustrative purposes the dimensions, especially thickness and / or size of the different elements shown may be exaggerated.

[0139] T urning first to Fig. 1a which shows an example of a gas pressure regulation system 100 according to the invention in an open state.

[0140] The system with a standard regulator with a needle valve behind. The regulator is calibrated to output more than it is needed (for example 40mbar instead of 30mbar). If it wasn’t adjusted to give a higher output, we would have no room to adjust - and when the pressure starts to drop, we have no possibility to compensate for that. The motor operated needle valve after the regulator is then adjusting the opening to give the right pressure after the needle valve. If the usage is going up (more heat on the burner) the pressure sensor will detect a drop in the pressure (because the flow can no longer keep up with the demand) and the needle valve will then adjust to give the correct pressure again. The second pressure sensor is to estimate the flow and to be a check for the first pressure sensor. The two sensors are placed in an area with different area of passage for the gas flow - when the same amount of gas has to pass through both openings in the same amount of time the pressure will be different in the two sensors. When there is no flow, the pressure will stabilize and be the same at both sensors, and the higher the flow the bigger difference between the measurements. This is used to tell the system that if there is no flow, there is no need to adjust the needle valve (it won’t change anything, and it will just continue to run to try to change the pressure). When there is no usage, the gas will slowly flow through the needle valve and there will be 40 mbar (as an example) in the whole system. But when the usage is starting again it will go back to 30 mbar very fast. In another version the motor will operate quick enough to close the needle valve completely, so there will not be an overpressure in the system - and then it will quickly open in the second the usage starts again (when a pressure drop is detected). Comment: we don’t do that in the first version because it would mean that we have to check for pressure changes every millisecond or so - consuming a lot of power. Fig. 1b shows the same example of a gas pressure regulation system 100 according to the invention in a closed state. Here the needle valve is pushed into the flow path to close off gas flow through the system.

[0141] In an embodiment the pressure sensor 5 has a first opening for gas passage, and the second sensor 6 has a second opening for gas passage, said first opening having a size which is different from the size of the second opening, so that when the same amount of gas passes through both openings at the same amount of time, the measured pressure measured by the pressure sensor 5 will be different from the measured pressure measured by the second sensor 6.

[0142] Turning to fig. 2 which shows an embodiment according to the invention. Here the gas regulator 1 is an element on its own and the regulating device 200 is an element on its own.

[0143] The gas regulator comprises an inlet 10 and an outlet 11 arranged opposite the inlet 10.

[0144] The gas regulator may be any type of gas regulator, that can function with the other elements of the system. The gas regulator is preferably the type of diaphragm gas regulator, that is described in the technical field.

[0145] The regulating device comprises an enclosure 212 for housing; the needle valve 4, the motor 8, the computing device, the pressure sensor 5 and the second sensor 6.

[0146] Said housing 212 has a reg. device inlet 210 and a reg. device outlet 211 arranged opposite said inlet 210.

[0147] The pressure sensor 5 and the second sensor 6 are arranged adjacent to each other, both arranged between the needle valve and the outlet 211 , so that gas will flow firstly into the regulating device through the inlet 210, past the needle valve 4 (if it is open to allow gas passage), past the pressure sensor, then past the second sensor 6 and then out through the outlet 211.

[0148] In this embodiment the separate elements (i.e. the regulator 1 and the regulating device 200) are connected to each other to form the gas pressure regulation system 100.

[0149] The connection is in this specific embodiment is done by attaching the gas regulator outlet 11 with the regulating device inlet 210. It will be understood that the attainment of the functionality of the gas pressure regulation system 100 may be achieved through different connection methods. Beyond the direct coupling of the gas regulator 1 and the regulating device 200, alternative approaches can be employed to establish this connection. For instance, an intermediate tube 20 could serve as the conduit, effectively linking the regulator and the regulating device. Similarly, the coupling might be facilitated through the utilization of a flexible hose or a conduit with a diameter suitable for maintaining the desired flow rate between the two components. These various connection means offer flexibility and adaptability to different setups and preferences, allowing for seamless integration while ensuring the efficient passage of gas between the gas regulator and the regulating device. The choice of connection method may also be based on factors such as the specific application, the desired flow rate, space constraints, and the overall setup of the gas supply system.

[0150] Turning to fig. 3 which illustrates an example of the above-described embodiment according to the invention. Here a tube 20 is adapted to connect the gas regulator 1 with the regulating device 200.

[0151] Also illustrated is a kit of parts according to the invention.

[0152] Here provided is a gas container 3 adapted for providing gas. In the shown example the gas container comprises liquified gas 17 and vaporized gas 18. The gas container 3 is connected to the inlet 10 of the gas regulator via a first tube 19.

[0153] A second tube is connected at one end to the outlet 11 of the gas regulator 1 , and at an opposite end, connected to the reg. device inlet 210 and the regulating device 200. The reg. device outlet 211 is connected to the receiving appliance 2 (in this example illustrated as a gas burner).

[0154] By providing the regulating device 200 adjacent to the usage point, it may help avoid pressure drop due to the length of the tube 20.

[0155] The invention further alleviates any problems with pressure drops occurring in the pipe between the regulator and the receiving appliance as well as pressure drops happening due to change of altitude (approximately 1 mbar per 1000 meter). Another embodiment of the gas pressure regulation system 100 is show on figs. 4 a-c, wherein the system 100 comprises a housing 300 adapted to enclose the regulator at least partially 1 and the regulating device 200. Hereby the gas pressure regulation system 100 may be provided as one unit / element having one inlet 10 and one outlet 211.

[0156] On fig. 4a the gas container 3 comprises more liquified gas 17 that vaporized gas 18. As the gas is burnt by the receiving appliance 2, e.g. a gas burner, the gas from the container is spent. On fig. 4b the amount of residual liquified gas is low after usage. On fig. 4c the receiving appliance has been turned off.

[0157] When the vaporization of the gas (from liquid to gas) can no longer keep up with the demand (because of low temperature or low level of gas -> little surface to get energy from the surrounding air) the output pressure of the regulator will drop (from 40mbar), but the needle valve will make sure that still 30 mbar is outputted from the unit. First when the regulator output is dropped below 30 mbar the unit can no longer keep the pressure at 30mbar.

[0158] We use a pressure sensor (and possibly a flow sensor) along with a motor to ensure a constant output pressure from the regulator. The difference is that instead of directly regulating on the membrane, we have moved the regulation to a needle valve (which could also be other valves allowing for changes in aperture size) located after the regulator. Instead of adjusting the regulator to the desired output pressure (e.g., 30 mbar), we now use a regulator adjusted to the desired output pressure plus a buffer (e.g., 35 mbar or 40 mbar). The pressure difference from the desired output pressure (30 mbar) to the set output pressure from the regulator is the range we can use to ensure a consistent output pressure after the needle valve.

[0159] With a normal regulator, it provides the desired output pressure when the container is fully filled, but as the pressure begins to drop in the container, the output pressure also decreases slightly. This means that the appliances are not supplied with gas at the optimized pressure, resulting in less efficient combustion. During tests, we observed that when the container is almost empty, the output pressure drops all the way to 18 mbar (before rapidly falling to 0). By setting the regulator to, for example, 35 mbar and fine- tuning it with the needle valve, we can maintain a consistent pressure for most of the duration, eventually dropping to 23 mbar. If the regulator is set to 42 mbar, we can maintain 30 mbar throughout this period. The needle valve operates by using a pressure sensor after the needle valve to measure the pressure. Then a motor adjusts the flow through the needle valve, adapting it to the consumption of the appliance. For example, when the burner is turned up, the needle valve opens further to allow sufficient gas to maintain the same pressure. The challenge with the needle valve is that when the appliance is turned off, gas will still seep through the needle valve, attempting to equalize the pressure (e.g., 35 or 42 mbar) on both sides of the valve. However, the pressure will never exceed the output of the regulator. When the appliance is turned off, the gas is trapped within the system, and even if the pressure sensor instructs the needle valve to reduce the opening due to high pressure, the pressure will not decrease since there is nowhere else for the gas to escape. Therefore, there needs to be a function that instructs the needle valve to stop adjusting if no change in pressure is detected or, ideally, a flow sensor that indicates if the flow is 0, in which case no adjustments should be made to the needle valve. In our initial version, instead of a flow sensor, we will have two pressure sensors placed one after the other, with different cross-sectional areas. This way, if the flow is 0, both sensors will show the same pressure. However, if there is flow, the pressure sensor in the area with the smaller cross- sectional area will display a higher pressure because the same amount of gas has to be forced through a smaller area. This is a known method of creating a flow meter.

[0160] The fact that the entire system ends up with a pressure of 35 (or 42 mbar) is not a significant issue because the moment the gas is turned on, the pressure will quickly drop again. It does not pose a risk if it has increased slightly.

[0161] The embodiment shown on fig. 5, the system 100 and / or the regulating device 200 further comprises an external sensor 7 arranged downstream of the pressure sensor 5, so as to measure a gas pressure at a distance from the reg. device outlet 211.

[0162] In an embodiment the external sensor 7 is arranged adjacent to a receiving appliance 2. In an embodiment the external sensor 7 is a pressure sensor or a flow sensor.

[0163] The external sensor 7 may inform the computing device 9 if the pressure has to be adjusted in order to give the desired level (e.g. 30 mbar) at the usage point. This exchange of information may be by wire or wireless. Fig. 6a illustrates an embodiment of the gas regulation system 100 where the second sensor 6 is a flow sensor, different from the pressure sensor 5. Hereby facilitating flow measurements.

[0164] In the embodiment shown on fig. 6b the gas regulation system 100 comprises a single pressure sensor 5. Here the flow is unknown. To overcome this it is possible to pro- gram / set the computing device so that if it tries to alter the position of the needle and the pressure does not changing for x seconds, then it should stop adjusting the needle valve 4, and wait for the pressure to change again before continue operation.

[0165] Lastly fig. 7 illustrates another embodiment of a gas pressure regulation system 100b for adjusting gas pressure comprising;

[0166] • a housing 300 adapted to enclose at least partially said system 100,

[0167] • an inlet 210 adapted for receiving gas,

[0168] • an outlet 11 , arranged opposite the inlet 210 in said housing 300, adapted for gas flow out from said system,

[0169] • three needle valves 4a-c adapted for regulating the gas pressure through the system,

[0170] • three motors 8 a-c, connected to said needle valves 4 a-c, said motor 8 being adapted to adjust the position of said needle valves 4 a-c,

[0171] • three, pressure sensors 5a-c adapted to measure, preferably periodically, a gas pressure at different positions in the system 100,

[0172] • a computing device 9 adapted to receive said gas pressure data from the pressure sensors 5 a-c, and based on said information, control the motor(s) 8(a-c), so that said motor(s) 8 (a-c) maintains and / or alters the position of the needle valves 4 a-c in accordance with the gas pressure measured by the pressure sensors 5 a-c.

[0173] In an embodiment the system 100b further comprising a second sensor 6. The second sensor is arranged adjacent to the sensors 5c. The second sensor 6 is arranged between the pressure sensor 5c and the outlet 11 .

[0174] In an embodiment the second sensor 6 is a flow sensor. In another embodiment the second sensor 6 is a pressure sensor. When gas passes in through the inlet 10 of the system 100b, the flow path of the gas takes it by the following (in specific order for this embodiment): the first needle valve 41 , the first pressure sensor 5a, the second needle valve 5b, the second pressure sensor 5b, the third needle valve 5c, the third pressure sensor 5c, the second sensor 6 and out through the outlet 11 .

[0175] In an embodiment the first valve may regulate pressure from 8 bar to 1 bar, the second from 1 bar to 60 mbar, and the final one from 60 mbar to 30 mbar. Importantly, all valves need the capability to halt flow when pressure starts to increase, preventing any accumulation of 8 bar throughout the system during periods of no consumption.

[0176] In an embodiment at least two needle valves are arranged in series to eliminate the need for a normal regulator.

[0177] In an embodiment the first valve changes the pressure from 8 to 1 bar, the next from 1bar to 50 mbar and then the last will output the 30 mbar. Only the last needle valve needs to be very precise (and output 30 mbar) the other needle valves may have a steeper thread - allowing them to be closed quickly when the usage is stopped (and the pressure is rising). - and to open quickly when the usage is starting again (and the pressure is dropping).

[0178] In theory, if the needle sensor is fast enough, it will have time to fully close the gas flow when the flow is measured at 0. Thus, it could be used without a traditional regulator in front. However, if, for example, there is 8 bar on one side of the needle valve and it should only be 30 mbar on the other side, even a slight delay would result in a significant pressure increase after the needle valve. This concern is even more significant if the needle valve cannot close completely, as even the slightest flow will eventually lead to 8 bar on both sides of the valve. Therefore, we are working towards a system consisting of 2 or more needle valves that gradually reduce the gas flow. The first valve, for example, can regulate from 8 bar down to 1 bar, then from 1 bar to 40 mbar, and finally from 40 to 30 mbar. The initial valve(s) can have coarser adjustment capabilities, allowing for faster regulation, while the fine adjustment occurs in the last valve, which requires a very fine (and slow) thread pitch.

[0179] While specific language has been used to describe the present subject matter, any limitations arising on account thereto, are not intended. As would be apparent to a person in the art, various working modifications may be made to the method in order to implement the inventive concept taught herein. The drawings and the foregoing description give examples of embodiments. Those skilled in the art will appreciate that one or more of the described elements may well be combined into a single functional element. Alternatively, certain elements may be split into multiple functional elements, Elements from one embodiment may be added to another embodiment.

[0180] List of reference numbers

Claims

Claims1. A gas pressure regulation system 100 for adjusting gas pressure comprising;- a gas regulator 1 comprising;• a regulator inlet 10 adapted to establish fluid connection with a gas container 3, so that gas may flow from said container 3 through said regulator, and• a regulator outlet 11 , opposite the regulator inlet 10, adapted for gas flow out from said regulator,- a regulating device 200 comprising;• a reg. device inlet 210 adapted for receiving gas, and• an reg. device outlet 211 , opposite the reg. device inlet 210, adapted for gas flow out from said regulating device,• a needle valve 4 adapted for regulating the flow of gas through the regulating device 200,• a motor 8, connected to said needle valve 4, said motor 8 being adapted to adjust the position of said needle valve 4,• a pressure sensor 5 adapted to measure, preferably periodically, a gas pressure between the needle valve 4 and the reg. device outlet 211 ,• a computing device 9 adapted to receive said gas pressure data from the pressure sensor 5, and based on said information, control the motor 8, so that said motor 8 maintains and / or alters the position of the needle valve 4 in accordance with the gas pressure measured by the pressure sensor 5.

2. A gas pressure regulation system 100 according to claim 1 , wherein the regulating device 200 further comprises a second sensor 6, preferably arranged adjacent to the pressure sensor 5.

3. A gas pressure regulation system 100 according to claim 2, wherein the pressure sensor 5 has a first opening for gas passage, and the second sensor 6 has a second opening for gas passage, said first opening having a size which is different from the size of the second opening, so that when the same amount of gas passes through both openings at the same amount of time, the measured pressure measured by the pressure sensor 5 will be different from the measured pressure measured by the second sensor 6.

4. A gas pressure regulation system 100 according to any one of the preceding claims, wherein the regulating device 200 further comprises an external sensor 7 arranged downstream of the pressure sensor 5, so as to measure a gas pressure at a distance from the reg. device outlet 211.

5. A gas pressure regulation system 100 according to any one of the preceding claims further comprising a housing 300 adapted to enclose the regulator at least partially 1 and the regulating device 200.

6. A gas pressure regulation system 100 according to any one of the preceding claims, wherein the regulating device 200 further comprises an enclosure 212 for housing said regulating device 200.

7. A method for controlling a flow of gas in a gas pressure regulation system 100 comprising the steps of:- providing said gas pressure regulation system according to any one of the preceding claims,- predefining a pressure setting of the gas regulator 1 depending on the receiving appliance,- providing gas flow through said system 100, preferably from a gas container 3 connected to the inlet 10 / 210 / 310,- measuring a gas pressure with the pressure sensor 5,- transmit said gas pressure data to the computing device 9,- based on the data, instruct the motor 8 to maintain and / or alter the position of the needle valve, so as to provide the desired gas pressure flow out of the system 100 to the receiving appliance 2.

8. A method according to claim 7 wherein the steps of the method are performed dynamically so as to maintain the pressure of the gas flow out of the regulator within a predetermined interval, preferably between approximately 20 - 40 mbar, more preferred between approximately 25 - 35 mbar.

9. A gas pressure regulation system 100b for adjusting gas flow comprising;• a housing 300 adapted to enclose at least partially said system 100,• an inlet 210 adapted for receiving gas,• an outlet 11, arranged opposite the inlet 210 in said housing 300, adapted for gas flow out from said system,• at least two, preferably at least three, needle valves 4a-c adapted for regulating the flow of gas through the system,• a motor 8, preferably at least three motors 8 a-c, connected to said needle valves 4 a-c, said motor 8 being adapted to adjust the position of said needle valves 4 a-c,• at least two, preferably at least three, pressure sensors 5a-c adapted to measure, preferably periodically, a gas pressure at different positions in the system 100,• a computing device 9 adapted to receive said gas pressure data from the pressure sensors 5 a-c, and based on said information, control the motor(s) 8(a-c), so that said motor(s) 8 (a-c) maintains and / or alters the position of the needle valves 4 a-c in accordance with the gas pressure measured by the pressure sensors 5 a-c.

10. A gas pressure regulation system 100b according to claim X, further comprising a second sensor 6, preferably arranged adjacent to one of the pressure sensors 5 a-c.

11. A kit of parts for improved gas flow comprising:- a gas container 3 adapted for providing gas,- a receiving appliance 2 adapted for receiving gas,- a gas pressure regulation system 100 OR a gas pressure regulation system 100b for regulating the flow of gas from said gas container to said receiving appliance 2, so as to provide an appropriately constant pressure level of the gas that reaches the receiving appliance 2.

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