• 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 method is provided for realizing a visible steam cloud in a steam room in which one or more persons can take place, whereby steam is generated and supplied to the steam room, whereby cold water mist is also generated and is supplied to the steam room at a position in the steam room to come into contact with the steam, and in which an ultrasonic nebulizer (10) is used for generating the cold water mist. The method can for instance find application in a steam cabin, namely by equipping a steam cabin with an ultra-steam system which has a mist device which is adapted to generate cold water mist and which has an outlet to let the cold water mist to the steam room of the steam cabin. in a position in the steam room to allow the cold water mist to come into contact with steam in the steam cabin.
    公开号:BE1026238B1
    申请号:E20195309
    申请日:2019-05-10
    公开日:2020-04-23
    发明作者:Niels Pieter Gerard Nieuweboer；Vette Karel Cornelis De
    申请人:Cleopatra B V；
    IPC主号:
    专利说明:

    Method for realizing a visible steam cloud in a steam room
    The invention primarily relates to a method for realizing a visible steam cloud in a steam room which is designed to provide space for one or more persons, whereby steam is generated and supplied to the steam room.
    Secondly, the invention relates to a steam cabin with a steam room which is arranged to accommodate one or more persons, comprising an ultra-steam system which is designed to realize a visible cloud of steam in the steam room.
    The invention relates, in the third place, to a cooling cabin with a cooling space which is designed to accommodate one or more persons, comprising a cooling system.
    Fourth, the invention relates to a module configured to discharge cold water mist to a room.
    A steam cabin is designed to accommodate one or more people and has a steam room in which certain conditions can be created under the influence of the supply of steam. In general, these conditions are a temperature in the order of 40 ° C to 50 ° C and a humidity of about 80% to 90% or even higher. This distinguishes a steam cabin from a sauna in which the temperature during use should be much higher and the humidity should be much lower.
    A basic part of a steam cabin is a steam generator that is designed to generate steam and which has an outlet to let the steam out to the steam room. In addition, a steam cabin can be equipped with other parts, in particular parts such as a shower, massage jets, etc. for direct water supply to the steam room.
    A widespread misunderstanding is that steam is visible. This misunderstanding is based on observations of mist, that is, visible clouds that actually consist of (very) fine water droplets, at a high
    BE2019 / 5309 temperature. Based on this misunderstanding, many users of a steam cabin expect to see clouds in the steam cabin when it is in operation. However, this is not always the case, as a result of which users of a steam cabin may wrongly feel that the steam cabin is not functioning optimally.
    It is an object of the invention to provide a technique on the basis of which the expectation of being able to see clouds in a steam cabin can be met. To this end, the invention provides a method for realizing a visible steam cloud in a steam room which is arranged to provide space for one or more persons, whereby steam is generated and supplied to the steam room, whereby cold water mist is also generated and the steam room is supplied to a position in the steam room to come into contact with the steam, and an ultrasonic nebulizer is used for generating the cold water mist.
    The invention is based on an insight that steam can be made visible by allowing cold water spray to come into contact with it. As soon as cold water mist is let into the steam room and steam present in the steam room penetrates, a process takes place in which heat is extracted from the steam, whereby partial condensation of the steam occurs. Because the cooling of the steam with cold water mist is effected, it is possible to allow the cold to penetrate well into a volume of steam in one go, so that a spectacular effect of a large visible cloud can be obtained.
    In a steam cabin, for example, it is possible for a mist device to be used to generate the cold water mist and to discharge it to the steam room of the steam cabin, and that an arrangement is also provided which makes it possible for a user to use a her desired moment to create a visible steam effect. For example, it may be practical to provide a button that can be briefly pressed by the user to activate the mist device. In practice it is most pleasant for a user when the steam effect can be created from time to time
    BE2019 / 5309, according to your wishes and needs. In general, it is practical when the cold water mist is supplied to the steam space in a measured amount. A supply of a small amount of cold water mist immediately gives a great effect as soon as it enters a steam-filled steam room. In practice it is easy to adjust the appropriate amount for a certain size of a steam room. An excessive amount of cold water mist does not give any additional effect when it comes to creating a visible steam effect, and it also has a cooling effect that in most cases will not be desired.
    Preferably, the cold water mist is supplied to the steam space at a higher level than the steam. In this way, a good penetration of the cold water mist in the steam can be achieved, based on the fact that cold ensures a downward flow, and heat for an upward flow.
    According to the invention, an ultrasonic nebulizer is used for generating the cold water mist. An ultrasonic nebulizer is a compact device that is easy to install. For proper operation of such a nebulizer it is in fact only necessary to have a power connection and a supply of tap water. The tap water can optionally be cooled at a position upstream of the ultrasonic nebulizer. Within the scope of the invention it has been found that good results can be obtained with widely available ultrasonic nebulizers, whereby large visible steam clouds can be realized in a very effective manner.
    It may be practical if the cold water mist is forced into the steam space for the purpose of supplying the cold water mist to the steam space. For example, a fan can be used to realize an effective flow of the cold water spray.
    For the sake of safety for the health of users, it is advantageous to bring generated water spray within the range of an anti-legionella welding system before entering the steam room
    BE2019 / 5309 to be supplied. Such an anti-legionella welding system may include, for example, a lamp for delivering ultraviolet radiation, the type of ultraviolet radiation being UV-B. It is also possible to subject the water used for the generation of the water mist to an anti-legionella treatment, for example by passing it through an anti-legionella filter.
    The invention further provides a steam cabin with a steam room adapted to accommodate one or more persons, comprising a steam generator adapted to generate steam and having an outlet for exhausting the steam into the steam room, and an ultra-steam system which is arranged to realize a visible steam cloud in the steam room, which ultra-steam system has a mist device with an ultrasonic nebulizer adapted to generate cold water mist, which mist device has an outlet for exhausting the cold water mist to the steam room at a position in the steam room to allow the cold water spray to come into contact with the steam. In line with what has been noted above in connection with the method according to the invention, in the context of the steam cabin according to the invention it may be that
    - the outlet of the mist device is at a higher level in relation to the steam room than the outlet of the steam generator,
    - the mist device furthermore has an inlet for introducing cooled or non-cooled tap water into the mist device, wherein a control of water supply to the mist device is provided, which is aimed at adding a suitable amount of tap water to the mist device when the ultra-steam system is activated. feed,
    - the ultra-steam system comprises a cooler arranged and arranged to cool the tap water upstream of the inlet of the mist device,
    - the ultra-steam system comprises a fan which is arranged and arranged to forcibly blow the cold water mist into the steam space for supplying the cold water mist to the steam space, and / or
    BE2019 / 5309
    the ultrasteam system comprises an anti-legionella welding system which is arranged and arranged to subject water mist to an anti-legionella treatment prior to its discharge into the steam room.
    The invention further provides a cooling booth with a cooling space adapted to accommodate one or more persons, comprising a cooling system with a spray device having an ultrasonic nebulizer, which is adapted to generate cold water spray, and which has an outlet for the cold water mist to the cooling room. According to an insight underlying the invention, the use of cold water spray to realize cooling in a cooling cabin offers advantages over conventional cooling techniques, in particular because the ratio between the obtained cooling effect and the required energy is relatively favorable. Incidentally, by cooling cabin is meant a cabin in which at least one person can sit, and which can for instance be used in a device with a high temperature, such as a sauna or steam bath.
    In line with what has been said in connection with the steam cabin above, in the context of the cooling cabin according to the invention it may be that
    - the mist device furthermore has an inlet for introducing cooled or non-cooled tap water into the mist device,
    - the cooling system comprises a cooler arranged and arranged to cool the tap water upstream of the inlet of the mist device,
    - the cooling system comprises a fan which is arranged and arranged to forcibly blow the cold water mist into the cooling space for the purpose of supplying the cold water mist to the cooling space, and / or
    the cooling system comprises an anti-legionella welding system which is arranged and arranged to subject water mist to an anti-legionella treatment before it is discharged into the cooling room.
    It may be practical if the steam or cooling booth includes a module built into a wall of the booth, which houses the mist device, and is equipped with a grille configured to
    BE2019 / 5309 To release cold water mist generated by the spray device from the module. By working with such a module, it is possible to easily apply the invention in existing cabins and / or integrate it into its design. The invention therefore further provides a module configured for generating cold water mist and for discharging cold water mist into a space, comprising a mist box containing a mist space, an ultrasonic nebulizer disposed in the mist space, a water inlet of outside the cloud box gives access to the cloud space, and a grille located in a wall of the cloud box. For example, as previously noted, the module may include a fan located in the nebula space and / or a lamp located in the nebula space and adapted to emit ultraviolet radiation.
    Within the scope of the invention there may be provided an assembly of said module and a mounting box which largely encloses the module. The mounting box is then an aid to mount the module in, for example, the wall of a steam cabin. From the above it follows that the design of the mounting box should in any case be aimed at allowing the connection of the module to water and electricity at appropriate places, and also to allow the outlet of cold water mist from the module to take place find.
    The invention will be further elucidated on the basis of the following description of a module which is adapted to deliver cold water mist during its operation. Reference will be made herein to the drawing, in which like reference numerals designate like or similar parts, and in which: Figures 1-4 schematically show different perspective views of the module, Figure 5 schematically shows a cross section of the module, Figures 6 and 7 schematically show front view and rear view of the module, respectively
    BE2019 / 5309 Figure 8 is a schematic exploded view of the module, Figure 9 schematically shows a perspective view of a mounting box and illustrates how the module is placed in the mounting box, and Figure 10 illustrates water, air and mist flows through the module.
    The figures relate to a module 100 according to the invention, which is adapted to be used in a steam cabin, and for which other applications are also conceivable as will be explained later in this description. Since steam cabins are known per se, no further explanation is given in this text. For the sake of completeness, it is explicitly stated that a steam cabin has a steam room and is equipped with a steam generator, which steam generator is arranged to generate steam and has an outlet to let the steam out to the steam room. For home applications, the size of the steam room can be tailored to a limited number of people, for example one or two, while for professional applications the size of the steam room can be significantly larger.
    The module 100 is configured to generate and deliver cold water mist and is therefore hereafter referred to as mist module 100. An important component of the mist module 100 is an ultrasonic nebulizer 10. The ultrasonic nebulizer 10 is capable of providing a water based fine water mist. In the example shown, the ultrasonic nebulizer 10 is provided with a number of heads 11 to discharge the water mist. The number of heads 11 is at least one and can be chosen freely within the scope of the invention. Furthermore, the ultrasonic nebulizer 10 is provided with a power connection point 12 and a protection 13 which is part of a control to switch off the nebulizer 10 when it is detected that the nebulizer 10 is insufficiently underwater. The said control, which is known per se, is important with an ultrasonic nebulizer 10 in order to ensure the proper functioning of this type of nebulizer.
    BE2019 / 5309
    In the spray module 100 shown, the ultrasonic nebulizer 10 is disposed in the interior space of a housing 20, which housing 20 is hereinafter referred to as fog box 20, and which interior space is hereinafter referred to as spray space. In the following description, when using terms as below and above, a normal, operational orientation of the spray module 100 is assumed, that is, an orientation as shown in the various figures, in which a bottom wall 21 with the ultrasonic nebulizer 10 thereon is located. is located on a bottom side of the spray module 100, in which adjoining upright walls 22, 23, 24 of the spray module 100, three of which are shown in the figures for the sake of clarity, extend substantially in vertical direction, and one in which a top wall 25 is located on an upper side of the spray module 100. One of the upright walls 22, 23, 24 is a composite wall with a grid 26 that serves to vent the cold water mist from the mist space. This upright wall will hereinafter be referred to as front wall 22, while the opposite upright wall will be referred to as rear wall 24. A bottom portion of the housing 20 is like a watertight container suitable for containing an amount of water required for the ultrasonic nebulizer 10 to function properly.
    In the rear wall 24 there is an air inlet opening 27. A fan 30 is arranged at the height of the air inlet opening 27 in the spray box 20 and serves to cool water mist generated by the ultrasonic nebulizer 10 during operation of the spray module 100 via the grille 26 of the front wall 22 blow out of the mist box 20. During operation, the spray module 100 is effective in dispensing cold water spray because the ultrasonic nebulizer 10 is located in a position just behind the grille 26 and there is no need to use hoses, pipes or the like to direct the cold water spray to a desired area to walk out.
    The rear wall 24 is provided at the rear with a holder 35 which serves to accommodate components (not shown) of the electronic control of the spray module 100. The electronic control of the
    BE2019 / 5309 spray module 100 works, among other things, with a water level sensor 36 for maintaining the water level in the spray box 20 and a temperature sensor 37 for keeping the temperature of the water in the spray box 20. Water supply and water discharge from the mist box 20 are controlled based on water level and temperature data. For the purpose of the said water supply and drainage, the rear wall 24 is provided at the rear with connecting pieces 38, and at the front with an opening 39 which allows the exchange of water between the interior and the exterior of the mist box 20, via the connecting pieces 38 to which water pipes (not shown) can be connected.
    Where water, in particular water spray, is used, there is a risk of contamination of the water with the legionella bacteria. To eliminate this risk, the fog module 100 is provided with an anti-legionella welding system 40. In the example shown, this system 40 comprises a lamp 41 for emitting ultraviolet radiation, for example ultraviolet radiation of the type UV-B. The lamp 41 is positioned at a strategic location in the spray module 100, namely at a high position in the spray module 100, against the top wall 25, so that it can be ensured that during operation of the spray module 100 all water spray is subjected to an anti-legionella treatment. . Not only the water mist that leaves the mist module 100 is guaranteed to be free from legionella contamination, also any (splash) water entering the mist box 20 via the grille 26 of the front wall 22 is directly affected by the lamp 41. It is advantageous when the spray module 100 is provided with a control which ensures that the spray module 100 cannot be activated if the anti-legionel welding system 40 is found not to function, which may for instance be the case when the lamp 41 is defective.
    For the purpose of mounting the mist module 100 in, for example, a wall of a steam cabin, it is practical when a mounting box 101 as shown in figure 9 is used with the mist module 100. This mounting box 101 can be of simple shape and, for example, of one
    BE2019 / 5309 number of stainless plates exist. In the example shown, the spray module 100 has a terminal block 45 located at the bottom and rear of the spray module 100, some distance from the connectors 38. It is practical when the design of the mounting box 101 is adapted to the rear of this connector block 45 accessible, and to leave the grille 26 of the front wall 22 at the front. Figure 9 illustrates how the mist module 100 can be slid into the mounting box 101. In an end position of the spray module 100 in the mounting box 101, the grating 26 of the front wall 22 abuts a front edge 102 of the mounting box 101.
    The installation of the spray module 100 in, for example, the wall of a steam cabin can be done by first placing the mounting box 101 in the wall, and then sliding the spray module 100 in and making the necessary connections. In this arrangement it is easy to take out the mist module 100, for example for maintenance or to exchange it. The design of the steam cabin does not or hardly need to be modified, as it is in fact sufficient when there is space for placing the mounting box 101.
    Referring to Figure 10, the operation of the spray module 100 will be explained below. It is hereby assumed that the spray module 100 is connected to water and electricity, and also that the spray space is sufficiently filled with water to enable the ultrasonic nebulizer 10 to function correctly. In Figure 10, the water level of the water present in the spray space is indicated by reference numeral 14.
    When the spray module 100 is activated, the ultrasonic nebulizer 10 is activated to generate water spray and the fan 30 is activated to blow the water spray out of the spray space. This water spray ends up above the water surface 14, which is schematically indicated in figure 10 by means of a vertically oriented arrow, the water spray itself being represented as a collection of curved lines. At the above-mentioned location above the water level 14, the water spray is in the region of the lamp 41 of the anti-legionella welding system 40. Furthermore, at that location the
    BE2019 / 5309 water mist under the influence of the fan 30, whereby an outgoing flow is obtained, which is directed from the mist space through the grid 26 of the front wall 22. This flow is schematically indicated in Figure 10 by a horizontal arrow on the left side of the figure, while an air supply for generating the flow is schematically indicated by a horizontal arrow on the right side of the figure. can be seen at the level of the fan 30.
    Water supplied to the mist space can be tap water drawn directly from the tap water system. However, it may also be the case that a suitable cooler is used to lower the temperature of the tap water before it is admitted to the mist chamber. For example, the temperature of tap water can be in a range from 5 ° C to 8 ° C, while a cooler can be used to achieve a temperature in a range from 1 ° C to 2 ° C. In any case, during operation of the spray module 100, the temperature sensor 37 has a function to prevent the temperature of the water from rising above a certain maximum value, which could otherwise take place under the influence of the operation of the ultrasonic nebulizer 10, since heat is released. For example, a maximum temperature can be 10 ° C. When it is found that the temperature of the water in the spray space is too high, this causes a supply of water to the spray space, and possibly also a discharge of water. The water supply and the water discharge are schematically indicated in figure 10 by means of two horizontal arrows which can be seen on the right-hand side of the figure at the position of the ultrasonic nebulizer 10. The supply of water and the discharge of water are further controlled using the water level sensor 36. When the water in the spray space becomes lower than a certain minimum, this causes a supply of water to the spray space. It will be clear to a person skilled in the art that, by means known per se, a control circuit may be provided in which the water level sensor 36 and the temperature sensor 37 are included, which control circuit is designed to at least realize the control steps indicated above.
    BE2019 / 5309
    When the spray module 100 is activated, the result is that cold water spray is generated and flows out of the grille 26 of the front wall 22. As previously indicated, the spray module 100 is adapted to be used in a steam cabin, and other applications of the spray module 100 are also conceivable. In the context of a steam cabin, the mist module 100 is ideally suited to contribute to a visible steam effect. A steam cabin has a steam room to which steam is supplied during operation. At times when cold water mist is also supplied to the steam room, such that the cold water mist can penetrate the steam, spectacular clouds are created that will be experienced as steam clouds by the user (s) of the steam cabin. The user (s) then see this as confirmation that the steam cabin is functioning properly. In the context of a steam cabin, it is possible that the mist module 100 is continuously operated during the steaming process, but this is not necessary. For example, provisions may also be made to enable the spray module 100 to be manually activated for a short time to give a burst of cold water spray for a temporarily visible steam effect. It is also possible to have a control that aims to automatically activate the spray module 100 for a certain period of time and then switch it off.
    From the foregoing it follows that by equipping a steam cabin with at least one spray module 100, an ultra-steam system is realized in the steam cabin, that is, a system which can be used to create the said visible steam effect in the steam cabin as desired. In view of the fact that heat rises and cold falls, it is advantageous to achieve the intended penetration of the steam with cold water spray when the cold water spray outlet is at a higher level in the steam cabin than the steam outlet.
    Another possible application of the spray module 100 is an application in a cooling booth. This can be a good and energy efficient alternative
    BE2019 / 5309 for example for a cold immersion bath or a cooling cabin that includes a conventional cooling system. The mist module 100 is easy to install using the mounting box 101. Safety can always be guaranteed by using the anti-legionella system 40.
    It will be apparent to one skilled in the art that the scope of the invention is not limited to the examples discussed above, but that various variations and modifications thereof are possible without departing from the scope of the invention as defined in the appended claims.
    For the sake of completeness, it is noted that where this text is about hot and cold, about high and low temperatures, this should be understood as being related to the cold and heat perception of people.
    In summary, according to the invention, a method is provided for realizing a visible steam cloud in a steam room in which one or more persons can take place, whereby steam is generated and supplied to the steam room, whereby cold water mist is also generated and supplied to the steam room is placed in a position in the steam room to come into contact with the steam, and in which an ultrasonic nebulizer 10 is used for generating the cold water mist. The method can for instance find application in a steam cabin, namely by equipping a steam cabin with an ultra-steam system which has a mist device which is adapted to generate cold water mist and which has an outlet for exhausting the cold water mist to the steam room of the steam cabin. in a position in the steam room to allow the cold water mist to come into contact with steam in the steam cabin. Other applications are also conceivable for the said mist device, for example an application in a cooling cabin.
    权利要求:
    Claims (23)
    [1]
    1. Method for realizing a visible steam cloud in a steam room which is arranged to accommodate one or more persons, whereby steam is generated and supplied to the steam room, whereby cold water mist is also generated and is supplied to the steam room at a position in the steam room to come into contact with the steam, and in which an ultrasonic nebulizer (10) is used for generating the cold water mist.
    [2]
    A method according to claim 1, wherein the cold water mist is supplied to the steam space at a higher level than the steam.
    [3]
    A method according to claim 1 or 2, wherein the cold water mist is supplied to the steam space in a measured amount.
    [4]
    A method according to any one of claims 1-3, wherein cooled or unchilled tap water is supplied to the ultrasonic nebulizer (10).
    [5]
    A method according to any one of claims 1-4, wherein for the purpose of supplying the cold water mist to the steam space, the cold water mist is forced into the steam space.
    [6]
    A method according to any one of claims 1 to 5, wherein generated water mist is brought into the range of an anti-legionella welding system (40) before being supplied to the steam room.
    [7]
    Steam cabin with a steam room adapted to accommodate one or more persons, comprising a steam generator adapted to generate steam and having an outlet for exhausting the steam into the steam room, and an ultra-steam system arranged to a visible
    BE2019 / 5309 steam cloud in the steam room, which ultra-steam system has a mist device with an ultrasonic nebulizer (10) adapted to generate cold water mist, which mist device has an outlet for exhausting the cold water mist to the steam room at a position in the steam room to allow the cold water spray to come into contact with the steam.
    [8]
    Steam cabin according to claim 7, wherein the outlet of the mist device is at a higher level relative to the steam space than the outlet of the steam generator.
    [9]
    Steam cabin as claimed in claim 7 or 8, wherein the mist device further has an inlet for introducing cooled or non-cooled tap water into the mist device, and wherein a control of water supply to the mist device is provided, which, upon activation of the ultra-steam system to supply a measured amount of tap water to the mist device.
    [10]
    Steam cabin according to claim 9, wherein the ultra-steam system comprises a cooler arranged and arranged to cool the tap water upstream of the inlet of the mist device.
    [11]
    Steam cabin according to any one of claims 7-10, wherein the ultra-steam system comprises a fan (30) which is arranged and arranged to forcibly blow the cold water mist into the steam room for supplying the cold water mist to the steam space.
    [12]
    Steam cabin according to any one of claims 7-11, wherein the ultra-steam system comprises an anti-legionella welding system (40) arranged and arranged to subject water mist to an anti-legionella treatment prior to its discharge into the steam room.
    BE2019 / 5309
    [13]
    Steam cabin according to any one of claims 7-12, comprising a module (100) built into a wall of the steam cabin, which houses the mist device, and which is provided with a grille (26) configured to be generated by the mist device let cold water mist out of the module (100).
    [14]
    Cooling cabin with a cooling space adapted to accommodate one or more persons, comprising a cooling system with a spray device having an ultrasonic nebulizer (10), which is designed to generate cold water mist, and which has an outlet for the cold water mist to the cooling room.
    [15]
    Cooling cabin according to claim 14, wherein the misting device further has an inlet for admitting cooled or non-cooled tap water into the misting device.
    [16]
    Cooling cabin according to claim 15, wherein the cooling system comprises a cooler arranged and arranged to cool the tap water upstream of the mist device inlet.
    [17]
    Cooling cabin according to any one of claims 14-16, wherein the cooling system comprises a fan (30) arranged and arranged to force the cold water mist into the cooling space for supplying the cold water mist to the cooling space.
    [18]
    Cooling cabin according to any one of claims 14-17, wherein the cooling system comprises an anti-legionella welding system (40) arranged and arranged to subject water mist to an anti-legionella treatment prior to leaving it to the cooling room.
    BE2019 / 5309
    [19]
    Cooling booth according to any of claims 14-18, comprising a module (100) built into a wall of the cooling booth housing the mist device and provided with a grille (26) configured to be generated by the mist device let cold water mist out of the module (100).
    [20]
    20. Module (100) configured to generate cold water mist and discharge cold water mist into a space, comprising a mist box (20) containing a mist space, an ultrasonic nebulizer (10) disposed in the mist space, a water inlet (38, 39) giving access to the mist space from outside the mist box, and a grille (26) located in a wall (22) of the mist box (20).
    [21]
    The module (100) of claim 20, comprising a fan (30) located in the spray space.
    [22]
    Module (100) according to claim 20 or 21, comprising a lamp (41) located in the nebula space and adapted to emit ultraviolet radiation.
    [23]
    An assembly of a module (100) according to any one of claims 20-22 and a mounting box (101) largely enclosing the module (100).
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    同族专利:
    公开号 | 公开日
    BE1026238A1|2019-11-21|
    NL2020924B1|2019-11-18|
    引用文献:
    公开号 | 申请日 | 公开日 | 申请人 | 专利标题
    JPH0852192A|1994-08-10|1996-02-27|Silver Kogyo Kk|Bath apparatus|
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    法律状态:
    2020-06-24| FG| Patent granted|Effective date: 20200423 |
    优先权:
    申请号 | 申请日 | 专利标题
    NL2020924A|NL2020924B1|2018-05-14|2018-05-14|Method for realizing a visible steam cloud in a steam room|
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