Steam generator with automatic supply and a process for measuring the level of liquid in such a generator
First Claim
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1. A steam generator with automatic supply comprising:
- a heating tube (20) comprising a vessel (21) designed for containing a liquid (26), at least one heating element (5) of the vessel (21), able to vaporize the liquid (26), means (10, 15,
16) for tapping the steam (27) in the vessel (21),a device (1, 2,
17) to supply the vessel (21) with liquid (26),a level sensor (11) to measure the level of the liquid (26) in the vessel (21) and arranged in a zone (30) of the vessel (21) situated at a set threshold level, said level sensor (11) comprising heating means (13), capable of heating the said zone (30) and measuring means (12) to measure the temperature in the said zone (30) and to compare this reading to a reference temperature, in order to establish whether the liquid (26) has reached the threshold level,a supply control (2) actuated by the level sensor (11) and acting on the supply device (1, 2,
17), which delivers the liquid (26) automatically to the vessel (21) when the level of liquid (26) is below the threshold level and blocks the supply when the level of the liquid (26) is greater than or equal to the threshold level, andan adjustment means (44,
45) designed to act in response to the tapping of steam (27), so that the temperature of the level sensor (11) varies with respect to the level of liquid (26), over a variation range enabling comparison with the reference temperature, and wherein said reference temperature lies within the variation range.
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Abstract
A steam generator with automatic supply having a level sensor arranged in a zone of a vessel located at a set threshold level, the sensor measuring the temperature and comparing it with a reference temperature, in order to establish whether a liquid reaches the threshold level, and an adjustment means acting in relation to the steam tapping operations so that the sensor temperature varies in relation to the level of liquid over a variation range, wherein the reference temperature remains within the variation range.
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Citations
15 Claims
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1. A steam generator with automatic supply comprising:
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a heating tube (20) comprising a vessel (21) designed for containing a liquid (26), at least one heating element (5) of the vessel (21), able to vaporize the liquid (26), means (10, 15,
16) for tapping the steam (27) in the vessel (21),a device (1, 2,
17) to supply the vessel (21) with liquid (26),a level sensor (11) to measure the level of the liquid (26) in the vessel (21) and arranged in a zone (30) of the vessel (21) situated at a set threshold level, said level sensor (11) comprising heating means (13), capable of heating the said zone (30) and measuring means (12) to measure the temperature in the said zone (30) and to compare this reading to a reference temperature, in order to establish whether the liquid (26) has reached the threshold level, a supply control (2) actuated by the level sensor (11) and acting on the supply device (1, 2,
17), which delivers the liquid (26) automatically to the vessel (21) when the level of liquid (26) is below the threshold level and blocks the supply when the level of the liquid (26) is greater than or equal to the threshold level, andan adjustment means (44,
45) designed to act in response to the tapping of steam (27), so that the temperature of the level sensor (11) varies with respect to the level of liquid (26), over a variation range enabling comparison with the reference temperature, and wherein said reference temperature lies within the variation range. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13)
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14. A process for measuring a level of liquid (26) in the vessel (21) of a steam generator (27) with automatic supply, comprising the steps of:
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a zone (30) of the vessel (21) located at a set threshold level is heated to a predetermined heating power, the temperature is measured in this zone (30), the temperature measured is compared to a reference temperature, in order to establish whether the level of liquid (26) reaches the threshold level, if the level of liquid (26) is less than the threshold level, the vessel (21) is supplied with liquid (26), if the level of liquid (26) is greater than or equal to the threshold level, the supply is blocked, wherein a temperature variation range of the said zone (30) is adjusted in response to steam tapping (27), the temperature varying in relation to the level of liquid (26) and to the reference temperature so that the reference temperature remains within the variation range. - View Dependent Claims (15)
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Specification