PORTABLE COLD AIR PRODUCTION DEVICE

Abstract

A portable cold air production device (10), suitable for body cooling, the device (10) comprising a lower portion (200) which includes a ventilation means (220) configured to generate an airflow (FA), and an upper portion (100) comprising a reservoir (110) suitable for receiving a liquid and a misting means (120) adapted to generate a jet of droplets (JG) through an ejection outlet (102) from the liquid in the reservoir (110), the upper portion (100) being movably mounted on the lower portion (200) between a usage configuration (CU) in which the misting means (120) is configured to generate the jet of droplets (JG) in the direction of the airflow (FA) generated by the ventilation means (220), and a retracted configuration (CE) in which the lower portion (200) covers the ejection outlet (102) of the upper portion (100). Figure from the summary: Figure 2

Description

Title of the invention: PORTABLE COLD AIR PRODUCTION DEVICE technical field

[0001] This description falls within the field of climate change adaptation, and more generally, energy. This description relates more specifically to a portable device for producing cold air, suitable for body cooling. Previous technique

[0002] Portable devices for personal thermal comfort are increasingly sought after due to rising global temperatures. Current solutions mainly include large, fixed devices designed to modify the thermal characteristics of ambient air, with side effects.

[0003] Among these devices, air conditioners are the most well-known. An air conditioner operates on the basis of a refrigeration circuit comprising four essential elements: a compressor, a condenser, an expansion valve, and an evaporator. This system captures heat from the ambient air in the room and expels it outside via a duct if it is a single-unit model, or via an outdoor unit if it is a split system. Although this type of device is effective at cooling large volumes of air, it does not provide localized cooling, making it less suitable for individual and portable use. Furthermore, the environmental impact of these systems is less than satisfactory due to the use of refrigerants, leaks of which contribute to the greenhouse effect and can be harmful to the environment, and the release of heat to the outside.Consequently, traditional air conditioners do not meet the portability and energy efficiency requirements necessary for personal comfort in various settings.

[0004] Air coolers are also known. Air coolers are generally equipped with a fan and a water, or even ice, reservoir. They operate on the principle of evaporative cooling: warm air from the room is drawn in and propelled by the fan towards a moistened pad, causing the water to evaporate and the temperature to drop. The cooled, but also more humid, air is then returned to the room. Unlike air conditioners, evaporative coolers do not contain refrigerant, making them more environmentally friendly. However, they require a moist pad, which results in pressure losses and therefore reduced efficiency. Furthermore, the primary purpose of these devices is generally to humidify the ambient air, which can range from This is contrary to the desired comfort level, especially in already humid environments. Coolers are generally used on a room-by-room basis and are limited to temperature reductions of 4 to 5°C at most. Regular ventilation of the room is necessary to remove excess humidity and thus reduce discomfort. These devices are not designed to be portable, which limits their usefulness for mobile use or in situations where portability is essential.

[0005] In summary, these devices, although available on the market, have major drawbacks such as environmental impacts, limited portability, and often insufficient efficiency. These devices often require significant power supplies and are not designed for mobile use. Furthermore, existing models fail to provide sufficient efficiency without impacting the immediate environment, which limits their usefulness in contexts where portability and energy efficiency are required. Summary

[0006] A portable cold air production device is proposed, suitable for cooling the body, the device comprising: - a lower part which includes a ventilation means configured to generate an airflow, - an upper part comprising a reservoir suitable for receiving a liquid, a misting means and an ejection outlet, the misting means being adapted to generate a jet of droplets through the ejection outlet from the liquid in the reservoir, in which the upper part is movably mounted on the lower part between a usage configuration in which the misting means is configured to generate the jet of droplets towards the airflow generated by the ventilation means, and a retracted configuration in which the lower part covers the ejection outlet of the upper part.

[0007] According to certain advantageous aspects, the device may include one or more of the following characteristics, taken individually or according to all possible technical combinations.

[0008] The misting means can be an ultrasonic probe configured to generate the jet of droplets from the liquid contained in the reservoir.

[0009] The lower part may include an internal structure to which the ventilation means is fixed and the upper part includes a support on which the misting means and the reservoir are mounted, and in which the internal structure and the support cooperate by complementarity of form to allow a movement of the upper part relative to the lower part between the retracted configuration and the configuration of use.

[0010] One of the internal structure and the support may include a female relief in the form of a rail and the other of the internal structure and the support includes a male relief received in a sliding manner in the female relief.

[0011] The ventilation means may include a radial fan.

[0012] The airflow can cross the droplet jet perpendicularly or substantially perpendicularly.

[0013] The lower part may include a power supply means configured to electrically supply the ventilation means and / or the misting means.

[0014] The lower part may include a control module configured to control the ventilation means and the misting means.

[0015] The lower part may include a lower housing which at least partially covers the ventilation means.

[0016] The upper part may include one or more flaps configured to direct the jet of droplets towards the airflow in the operating configuration. Brief description of the drawings

[0017] Other features, details and advantages will become apparent upon reading the detailed description below, and upon analysis of the accompanying drawings, on which:

[0018] [Fig-1] represents a schematic side view of an air production device cold as described herein, in a retracted configuration.

[0019] [Fig.2] represents a schematic side view of the cold air production device of [Fig.1], in a usage configuration.

[0020] [Fig.3] represents an exploded view of the cold air production device of figures 1 and 2.

[0021] [Fig.4] represents a schematic front view of the device of [Fig.1]. Description of the implementation methods

[0022] A portable cold air production device 10, suitable for cooling the body of a user, is now described with reference to Figures 1 to 4.

[0023] The device 10 comprises a lower portion 200 which includes a ventilation means 220 configured to generate an airflow FA. The device 10 further comprises an upper portion 100 which includes a reservoir 110 suitable for receiving a liquid, a misting means 120, and an ejection outlet 102. More specifically, the reservoir 110 has an internal volume suitable for receiving a liquid. In the illustrated example, the reservoir 110 is filled, in whole or in part, with liquid. The misting means 120 is adapted to generate a jet of droplets JG through the ejection outlet 102 from the liquid in the reservoir 110.

[0024] Remarkably, the upper part 100 is movably mounted on the lower part 200 between a CU usage configuration (visible at the [Fig. 2]) and a retracted configuration CE (visible in [Fig. 1]). In the operating configuration, the misting means 120 is configured to generate the droplet jet JG towards the airflow FA generated by the ventilation means 220. In the retracted configuration CE, the lower part 200 covers the ejection outlet 102 of the upper part 100. In other words, the misting means 120 is not accessible in the retracted configuration CE.

[0025] The portable cold air production device 10 provides targeted cooling of the human body by using a ventilation means 220 to generate an airflow FA and a misting means 120 to create a jet of droplets JG (i.e., a mist) from the liquid contained in the reservoir 110. This configuration allows for rapid evaporation of the liquid in the mist, thus producing an intense and localized cooling effect without requiring the cooling of a large volume of ambient air. The cooling generated by the device 10 is based on the physical principle that air, always humid but unsaturated, is a "reservoir of coolness" up to its saturation point. In this sense, the airflow FA accelerates the evaporation of the droplets, locally cooling the air and propelling this cooled air towards the user.This allows for localized cooling of 5°C to 10°C, or even more, depending on the initial thermodynamic state of the ambient air. This arrangement also minimizes the impact on the immediate environment, as the cooling is concentrated on the user without affecting surrounding people or objects.

[0026] Also, the device 10 can have a coefficient of performance (commonly referred to by the acronym COP) of up to 30, meaning that it can produce a cooling capacity (or refrigeration capacity) of up to 30 W for an electrical input of 1 W. Such a high COP is explained by the fact that water is not strictly evaporated from a wet surface or a wet pad, but rather the natural kinetics of the ambient air are encouraged towards a state of saturation when a water source is available. Remarkably, the device 10 therefore does not require a wet support 130 for local air cooling of the airflow FA, which avoids pressure losses in the airflow. Thus, the cold is produced outside the device 10, on the surface of droplets, thus presenting a maximum evaporation area in a medium free from any constraint and material obstacle.

[0027] The droplets can be completely evaporated after traveling a few tens of centimeters through the FA airflow. The cooling effect is maximized to cool the user. In other words, the device 10 is effective when held in the hand, for example while moving, or even placed nearby on a table.

[0028] Remarkably, device 10 does not release any harmful gases (CO2, NH4, NO2) or greenhouse gases to produce local air cooling. Similarly, device 10 does not produce any heat emissions in exchange for the cooling power it generates. In this respect, device 10 addresses current challenges related to reducing environmental footprint.

[0029] The upper part 100 of the device 10, comprising the reservoir 110 and the misting means 120, is movably mounted on the lower part 200, allowing it to switch between the operating configuration CU and the retracted configuration CE (represented by arrow F in [Fig. 2] for switching from the retracted configuration CE to the operating configuration CU). This mobility improves the portability and ease of use of the device 10, allowing it to be easily stored when not in use and quickly deployed for immediate cooling. Furthermore, in the retracted configuration CE, the misting means 120 is protected because the discharge outlet 102 is covered, or even obscured, by the lower part 200. The device 10 can thus be stored without damaging the misting means 120.

[0030] By integrating the liquid reservoir 110 into the upper part 100 and the fan into the lower part 200, a stacked configuration is obtained, allowing the device 10 to be compact and lightweight, facilitating its transport and use on the go. In other words, the upper part 100 can be stacked on top of the lower part 200. In this sense, a superposition direction Ds is defined along which the lower part 200 and the upper part 100 are superimposed. In a user position of the device 10 (i.e., held in a user's hand), the superposition direction Ds can coincide with a vertical direction or be close to the vertical direction. In the retracted CE configuration, the misting means 120 can be opposite the lower part 200 along the superposition direction Ds.Due to its stacked configuration, it is possible to obtain a device 10 with a substantially flat shape, notably with a low thickness, for example less than or equal to 16 mm. The noticeably flat shape of the device 10 (and therefore of the upper part 100 and the lower part 200) makes it easier to store the device 10, for example in a bag or pocket.

[0031] Each of the elements of the device 10, namely the lower part 200 and the upper part 100, and in particular each of the components described above and below included in the lower part 200 and the upper part 100, can be assembled and / or disassembled (by interlocking, for example) independently of each other. In this sense, the device 10 has a modular design. This modular design between a lower part 200 and an upper part 100 also allows for easy maintenance and replacement of the individual components. increasing the durability and repairability of device 10. According to a particular operating mode, this also allows the fan to be used alone.

[0032] The device 10 can be carried with one hand, particularly at the lower part 200. Alternatively, the device 10 can be configured to be placed on a base or table, or to be held by a support arm 130.

[0033] The misting means 120 can be an ultrasonic probe configured to generate the jet of droplets JG from the liquid contained in the reservoir 110. Such an ultrasonic probe is also sometimes called an atomic mister or ultrasonic mister.

[0034] The droplet jet JG thus comprises a large number of droplets (for example, microdroplets, i.e., microscopic in size, or nanodroplets, i.e., nanometric in size) which develop a very large contact surface with the ambient air. This allows for very rapid evaporation of these droplets, hence the production of cold over a short distance. A perception of cold, and not of humidity, is obtained by the user, or by their immediate environment, in the axis of the airflow FA created. An ultrasonic probe also has the advantage of being quiet. For example, the ultrasonic probe can be configured to emit a noise level of less than 25 dB, or even less than 20 dB. This avoids noise pollution during the use of the device 10, particularly in quiet environments (exhibitions, public transport, cinemas, shows, etc.).The ultrasonic probe offers reduced energy consumption compared to other misting methods, thus increasing the battery life of the portable device.

[0035] The ultrasonic probe may include a membrane comprising a plurality of microholes, which is capable of being set into vibration. The ultrasonic probe may include a drive means for setting the membrane into vibration, such as a piezoelectric element.

[0036] As stated above, the droplets generated by the misting means 120 can be microdroplets.

[0037] The ultrasonic probe can be configured to generate a continuous and uniform jet of JG droplets, ensuring a constant and stable cooling output. The JG droplet jet can have a shape configured to optimize droplet evaporation, for example, cylindrical, conical, or frustoconical.

[0038] The ultrasonic probe may include an ejection face arranged opposite the ejection outlet 102 of the upper part 100. In the CU operating configuration, the ejection face may be oriented outwards from the device 10. In this sense, the ejection face may be exposed to the air in the CU operating configuration. Conversely, in the retracted CE configuration, the ejection face may be opposite the lower part 200.

[0039] The ultrasonic probe may further include a wet face in contact with the liquid contained in the reservoir 110 through an outlet 112 of the reservoir 110. The outlet 112 of the reservoir 110 may be located in a lower part, or even at the lower end, of the reservoir 110. Thus, the wet face of the ultrasonic probe can be in contact with the liquid by gravity, i.e., without a pumping system. Alternatively, the outlet 112 may be located on the side or on the top of the reservoir 110. In this case, an active pumping element (such as a pump) or a passive one, for example operating by capillary action (e.g., through a fabric, a capillary filter, or felt), may be provided. Preferably, the reservoir 110 is free of obstruction in the vicinity of the outlet opening 112 in order to avoid any deviation or bending of the liquid which would cause a loss of pressure.

[0040] In the CU operating configuration, the droplet jet JG can be generated externally to the device 10. This prevents the presence of liquid in the device 10, which could lead to mold and / or corrosion, and therefore degradation and failure. It is understood that, in the retracted CE configuration, a droplet jet JG cannot be generated externally to the device 10 because the ejection outlet is covered by the lower part 220.

[0041] Particularly visible in [Fig. 3], the lower part 200 may include an internal structure 210 to which the ventilation means 220 is attached. The internal structure 210 will be described in more detail later. Furthermore, the upper part 100 may include a support 130, also visible in [Fig. 3], on which the misting means 120 and the reservoir 110 are mounted. The internal structure 210 and the support 130 may cooperate by complementary shapes to allow movement of the upper part 100 relative to the lower part 200 between the retracted configuration CE and the operating configuration CU. This complementary shape between the internal structure 210 and the support 130 allows for smooth and secure movement of the upper part 100, thus facilitating the transition between the operating and retracted configurations.

[0042] The upper part 100 can be mounted to slide on the lower part 200 in a deployment direction Dd, in particular by means of the support 130 sliding on the internal structure 210. The complementary shape between the internal structure 210 and the support 130 can allow the upper part 100 to slide relative to the lower part 200, and in particular block any other degree of freedom of the upper part 100 relative to the lower part 200.

[0043] The device 10 can be substantially flat and compact along a direction perpendicular Dp to the deployment direction Dd and the superposition direction Ds. The thickness of the device 10 can be considered along this perpendicular direction Dp.

[0044] The form cooperation between the internal structure 210 and the support 130 can be of the sliding dovetail type. One of the internal structure 210 and the support 130 can include a female relief 131 in the form of a rail extending along the deployment direction Dd, the other of the internal structure 210 and the support 130 can include a male relief 216 received into the female relief 131 in a sliding manner along the first deployment direction Dd. In the illustrated example, the support 130 includes the female relief 131 in the form of a rail, and the internal structure 210 includes the male relief 216. The male relief 216 can be extended along the deployment direction Dd. In addition, the male relief 216 may have a T-shaped profile intended to cooperate with the female relief 131 to prevent separation or spreading of the upper part 100 and the lower part 200 according to the superposition direction Ds.

[0045] The female relief 131 may include retaining elements on each side according to the deployment direction Dd. The retaining elements may be adapted to limit, or even constrain, the movement of the upper part between the retracted configuration CE and the operational configuration CU. In other words, the retaining elements limit, or even prevent, movement of the upper part beyond the retracted configuration CE and the operational configuration CU. The female relief 131 may include at least one retaining element corresponding to the retracted configuration CE of the upper part 100 relative to the lower part 200 and at least one retaining element corresponding to the operational configuration CU of the upper part 100 relative to the lower part 200.The male relief 216 can be supported on one of the retaining elements when the upper part 100 is in the CU usage configuration and supported on another of the retaining elements when the upper part 100 is in the CU usage configuration.

[0046] The retaining element corresponding to the operating configuration can be configured to allow the upper part to move beyond the operating configuration CU by applying a force to the upper part 100 when it is in the operating configuration CU, the force being applied in the direction towards the operating configuration CU from the retracted configuration CE. Thus, it is possible to separate the upper part 100 from the lower part 200. The force to be applied to allow the upper part to move beyond the operating configuration CU may exceed a threshold force to prevent unintentional separation of the upper part 100 from the lower part 200. For this purpose, the retaining element may be an elastic interlocking element, such as a boss, for example.Alternatively, or in addition, such a retaining element may also be provided at the level of the retracted configuration.

[0047] The support 130 may include a hole 132. The hole 132 may be through-hole. The hole 132 may define the ejection outlet 102, particularly at one of its ends. The misting means 120 may be, in whole or in part, fixedly housed in the hole 132 of the support 130. The misting means 120 may be fixed to the support 130 by a circular gasket that provides both a tight seal by clamping pressure and freedom of movement under vibration.

[0048] The reservoir 110 can be removably connected to the support 130, for example by elastic snap-fit ​​(i.e., by clipping), preferably in a leak-proof manner. The reservoir 110 is thus interchangeable. Therefore, the user can easily replace the empty reservoir 110 with another full one, for example, with a reservoir of a different shape, capacity, or appearance. The reservoir may include a means for closing the outlet opening 112, which is configured to be leak-proof when the reservoir 110 is not connected to the support 130 and to be open to allow liquid communication between the internal volume of the reservoir 110 and the hole 132 in the support when the reservoir 110 is connected to the support 130. The closing means may be configured to remain closed as long as the reservoir is not mounted on the support.The transition from the closed to the open state of the closing means can be achieved when the outlet opening of the reservoir is aligned with the hole 132, for example, through cooperation with complementary means of the support. In one embodiment, the reservoir 110 can be integral (i.e., fixedly connected), or even a single piece (i.e., made from a single material), with the support 130. Replacing the reservoir 110 thus involves replacing both the reservoir 110 and its associated support 130. In this case, the outlet opening 112 of the reservoir can coincide with one end of the hole 132 in the support 130.

[0049] The tank 110 may include a filling opening 111, preferably closable, through which the user can fill the tank 110. The filling opening 111 may be arranged at the level of an upper part of the tank 110. The filling opening 111 may be arranged on an opposite side of the outlet opening 112.

[0050] The liquid may be water. Preferably, it is demineralized or deionized water (for example, free of calcium and magnesium ions) to prevent scaling of the misting device. Alternatively, it may be tap water, i.e., water drawn from a common water distribution network, for example, from a household tap. Furthermore, the liquid may contain a fragrance. For example, the liquid may be scented water. The device 10 may include a UV radiation means (i.e., an ultraviolet radiation emission means) configured to eliminate bacteria and microorganisms in the liquid contained in the reservoir. Indeed, the liquid can be a breeding ground for bacteria and microorganisms, which can be harmful. UV radiation prevents the proliferation of bacteria and / or microorganisms in the liquid and therefore their presence in the droplet spray. The UV radiation device can be a diode or a lamp. It can be integrated into the reservoir.

[0051] The reservoir 110 can be adapted to hold between 50 ml and 100 ml of liquid. For example, the reservoir 110 can be adapted to hold 60 ml of liquid. A capacity of between 50 and 60 ml provides, on average, one hour of water autonomy. This duration can be adjusted by setting, for example, the frequency of the probe's flow rate, according to the user's cooling requirements and / or the thermo-hygrometric environment.

[0052] The ventilation means 220 may include a radial fan. A radial fan is also called a centrifugal fan. The high pressure and low outlet volume of a radial fan make it ideal for air circulation in concentrated areas. In addition, such a fan is compact and lightweight. It is also quieter (compared to an axial fan). The fan's voltage can be adjusted according to the user's needs and / or the surrounding temperature and humidity conditions.

[0053] The ventilation means 220 (in particular the fan) may include a motor. The ventilation means 220 may include an annular row of blades, in particular driven in rotation by the motor. The arrangement of the ventilation means 220 in the lower part 200, and therefore at a distance from the liquid reservoir 110, provides better protection of the ventilation means 220, in particular its motor, against liquid and moisture.

[0054] In one embodiment, the ventilation means 220 may include an axial fan.

[0055] The internal structure 210 of the lower portion 200 may include a first housing 211 in which the ventilation means 220 is housed. The first housing 211 may include at least one air inlet opening 214. The first housing 211 may include an air outlet opening 215 through which the generated airflow FA is ejected. As shown in [Fig. 4], the air outlet opening 215 may have a trapezoidal shape to better conform the airflow FA to the droplet jet JG. In this sense, the airflow FA may have a flared shape corresponding to, or even identical to, a flared shape (conical or frustoconical, for example) of the droplet jet JG. Alternatively, or additionally, the air outlet opening 215 may have a cross-section configured to increase the velocity and pressure of the airflow FA.

[0056] The ventilation means 220 can have a power on the order of the Watt.

[0057] The airflow FA can intersect the droplet jet JG perpendicularly or substantially perpendicularly. In other words, the airflow FA and the droplet jet JG are perpendicular or substantially perpendicular to each other when they meet. According to another equivalent formulation, at least locally where the droplet jet JG intersects the airflow FA, the airflow FA can be directed along a first direction d1 and the droplet jet JG can be directed along a second direction d2, the first direction d1 and the second direction d2 being perpendicular or substantially perpendicular to each other. Thus, local air cooling is optimized, and a phenomenon of coalescence and condensation of the mist that would cause the user to feel droplets is avoided. The droplet jet JG and the airflow FA can each be flared along the second direction.

[0058] Alternatively, the droplet jet JG and the airflow FA can be mixed at an angle of less than 90°, i.e. in such a way as to avoid a return of the droplets towards the misting means 120 and / or the ventilation means 220.

[0059] The lower portion 200 may include a power supply 240 configured to electrically supply the ventilation means 220 and / or the misting means 120. In other words, the power supply 240 delivers electrical power enabling the operation of the ventilation means 220 and / or the misting means 120. The electrical connection between the power supply 240 (which is located in the lower portion 200) and the misting means 120 (which is located in the upper portion 100) may include a pair of conductive tracks arranged respectively on the lower portion 200 and the upper portion 100 and in contact with each other. The conductive tracks may remain in contact with each other when the upper portion 100 is moved relative to the lower portion 200 between the operating configuration CU and the retracted configuration CE.The conductive tracks can be configured to slide against each other when the upper part 100 is moved relative to the lower part 200 between the operating configuration CU and the retracted configuration CE. Each track can be extended along the deployment direction Dd. The conductive tracks can be arranged respectively on the female relief 131 and on the male relief 216. The conductive tracks can be metallic. The electrical connection between the power supply 240 and the misting means 120 can include an electrical cable connecting the power supply to the conductive track of the lower part 200 and / or an electrical cable connecting the misting means 120 to the track of the upper part 100.

[0060] The 240 power supply means may include a battery, preferably of the 3.7 V or 5 V Li-ion type, known for its high energy density and long lifespan Battery life. The battery can have a capacity between 5 and 11 Wh, for example, 10 Wh. Alternatively, the battery can be a Li-Poly (Lithium-Polymer) type, offering greater flexibility in shape and improved safety. Other types of rechargeable batteries, such as NiMH (Nickel-Metal Hydride) or NiCd (Nickel-Cadmium) batteries, can also be considered. Depending on the variant, the battery can contain one or more alkaline batteries, for example, standardized ones such as AA or AAA.

[0061] The battery can be rechargeable. To this end, the 240V power supply can include a charging interface, offering several connectivity options to meet the diverse needs of users. For example, the charging interface can be wired, such as USB, allowing universal compatibility with many common chargers and electronic devices. Alternatively, the interface can be USB-C, offering additional advantages such as faster charging speed. Furthermore, the device can be equipped with a wireless charging interface, using inductive charging technology to eliminate the need for physical cables. This wireless option can be particularly useful for quick and easy charging on the go.These various connectivity options for charging ensure maximum flexibility and increased convenience for the user, while guaranteeing that the device remains operational in a variety of contexts and environments.

[0062] The 240 power supply means may include a solar power charging element.

[0063] The power supply 240 can be attached, preferably removably, to the internal structure 210. For this purpose, the internal structure 210 can include a second housing 212 in which the power supply 240 is housed. Thus, the power supply 240 is interchangeable, allowing easy replacement in case of failure or to extend autonomy by carrying spare batteries.

[0064] The lower part 200 may include a control module 230 configured to control the ventilation means 220 and the misting means 120.

[0065] The control module 230 can separately control the ventilation means 220 and the misting means 120.

[0066] More specifically, the control module 230 can be configured to control the activation of the ventilation means 220, and preferably the setting of at least one airflow parameter FA, including speed, flow rate, and pressure. For example, the control module 230 can be configured to control the fan's rotational speed (i.e., the rotational speed of the fan blades). fan). The 230 control module can be electrically connected to the fan motor.

[0067] The control module 230 can be configured to control the activation of the misting device 120, and preferably the adjustment of at least one parameter of the droplet jet JG, such as the flow rate, droplet size, or droplet volume. For example, the control module 230 can be configured to control the vibration frequency of the ultrasonic probe, in particular by means of a piezoelectric element. The control module 230 can be electrically connected to the misting device 120.

[0068] The control module 230 can be configured to allow activation of the misting device 120 only if the ventilation device 220 is activated. The control module 230 can be configured to allow activation of the misting device 120 only if the upper part 100 is in the CU operating configuration.

[0069] The 230 control module can be electrically powered by the 240 power supply.

[0070] The control module 230 can be fixed to the internal structure 210. The internal structure 210 can include a third housing 213 in which the control module 230 is housed, in whole or in part.

[0071] The control module 230 may include one or more control buttons 232 configured to be accessible to a user and by which the user can control the ventilation means 220 and / or the misting means 120. One or more of said control buttons 232 may be a potentiometer, for example, for adjusting the fan speed. Alternatively, or in addition, one or more of said control buttons 232 may be a switch, for example, of the spring-loaded push-button or toggle type. Alternatively, or in addition, at least one or more of said control buttons 232 may be of the touch type, allowing activation by simple contact, thus providing an intuitive user interface. These separate settings may constitute a means of adapting the device 10 to the surrounding climatic conditions (temperature, humidity).Fan speed and probe flow rate settings can be adjusted continuously or according to predefined values.

[0072] The control module 230 may include an electrical board. Said one or more control buttons 232 may be connected to the electronic board 231.

[0073] The lower part 200 may include a lower housing 250 which covers at least part of the ventilation means 220.

[0074] The lower housing 250 may cover all or part of the internal structure 210. For each of the air inlet openings 214 and / or air outlet openings 215 of the internal structure 210, the lower housing 250 may include a corresponding opening 254; 255 opposite it. The corresponding openings of the internal structure 210 and the lower housing 250 may have different shapes. The opening 255 of the housing opposite the air outlet opening 215 may be closable, for example, by a sliding cover or a pivoting flap. The opening 255 is intended, in particular, to be closed when the device is in the retracted configuration. This further improves the protection of the misting and ventilation means when the device is not in use.

[0075] The lower housing 250 can be removably fixed to the internal structure 210, for example by elastic snap-fit ​​(i.e. by clipping), or for example by means of screws.

[0076] The housing may cover, in whole or in part, the power supply means 240. Preferably, the lower housing 250 includes an opening opposite the charging interface and adapted to insert a charging element cooperating with the charging interface.

[0077] The housing may cover, in whole or in part, the control module 230. Preferably, for each of said one or more control buttons 232, the lower housing 250 includes an opening 252 adapted to allow a user to operate the corresponding control button 232. At least one, and preferably each, of said one or more control buttons 232 may be flush with the surface of the lower housing 250 or protrude from the lower housing 250.

[0078] The lower casing of the Device 10 is interchangeable and customizable, allowing users to choose from a variety of colors, materials, and finishes to suit their aesthetic and functional preferences. This interchangeability not only provides an enhanced user experience but also allows the Device 10 to be adapted to different environments and uses, whether in a professional, home, or mobile setting. Users can easily replace the casing to match their needs or personal style.

[0079] The casing of the device 10 may have an ergonomic shape, i.e., with curves for a comfortable and secure grip. For example, the casing may be slightly curved to fit the shape of the hand. The casing may include non-slip surfaces and / or textured areas, for example on the sides, to improve grip. In addition, the casing may have finger indentations, allowing for a natural grip and reducing fatigue during prolonged use. This ergonomic design ensures easy handling The device is easy and pleasant to use, whether on the go or in everyday use situations.

[0080] Optionally, the upper portion 100 may include one or more flaps 140 configured to direct the droplet jet JG towards the airflow FA in the operating configuration CU. In the example shown, the upper portion 100 includes a pair of flaps 140. The presence of flaps 140 in the upper portion 100, configured to direct the droplet jet JG towards the airflow FA in the operating configuration CU, allows for precise control of the direction and dispersion of the droplets. Furthermore, said one or more flaps 140 allow for better alignment of the airflow FA with the droplet jet JG. In this case, said one or more flaps 140 can align the airflow FA in a complementary manner with the air outlet 215. In addition, said one or more flaps 140 prevent dispersion of the airflow FA. In this sense, the said one or more flaps concentrate the FA airflow.This optimizes the interaction between the JG droplet jet and the FA airflow, thereby improving evaporation efficiency and, consequently, the cooling produced. Adaptation to surrounding climatic conditions is thus achieved: temperature and humidity, but also available space (crowd or open space).

[0081] The flaps 140 can be connected to the reservoir 110. The flaps 140 can be spread apart in the direction perpendicular Dp to the deployment direction Dd and the overlapping direction Ds. The ejection outlet 102 can be arranged between the flaps 140. Each flap 140 can extend in a normal plane in the direction perpendicular Dp to the deployment direction Dd and the overlapping direction Ds. In other words, each flap 140 can be substantially flat and perpendicular to the direction perpendicular Dp to the deployment direction Dd and the overlapping direction Ds.

[0082] In the retracted CE configuration, the lower part 200 can be arranged between the flaps 140.

[0083] In the retracted CE configuration, the flaps 140 can be received in the lower housing 250.

[0084] Furthermore, the flaps 140 can be adjusted; for example, their inclination around an axis along the deployment direction Dd and / or along the overlapping direction Ds can be adjusted to modify the angle and direction of the droplet jet JG, thus offering flexibility of use according to the specific needs of the user. This adjustability allows the device 10 to be adapted to different situations and preferences, thereby increasing its versatility and ease of use.

Claims

Demands

1. A portable cold air production device (10), suitable for body cooling, the device (10) comprising: - a lower part (200) which includes a ventilation means (220) configured to generate an airflow (FA), - an upper part (100) comprising a reservoir (110) suitable for receiving a liquid, a misting means (120) and an ejection outlet (102), the misting means (120) being adapted to generate a jet of droplets (JG) through the ejection outlet (102) from the liquid in the reservoir (110), wherein the upper part (100) is movably mounted on the lower part (200) between a usage configuration (CU) in which the misting means (120) is configured to generate the jet of droplets (JG) in the direction of the airflow (FA) generated by the ventilation means (220),and a retractable configuration (CE) in which the lower part (200) covers the ejection outlet (102) of the upper part (100).

2. Device (10) according to the preceding claim, wherein the misting means (120) is an ultrasonic probe configured to generate the jet of droplets (JG) from the liquid contained in the reservoir (110).

3. Device (10) according to any one of the preceding claims, wherein the lower part (200) comprises an internal structure (210) to which the ventilation means (220) is fixed and the upper part (100) comprises a support (130) on which the misting means (120) and the reservoir (110) are mounted, and wherein the internal structure (210) and the support (130) cooperate by complementary shape to allow movement of the upper part (100) relative to the lower part (200) between the retracted configuration (CE) and the operating configuration (CU).

4. Device according to the preceding claim, wherein one of the internal structure (210) and the support (130) comprises a female relief (131) in the form of a rail and the other of the internal structure (210) and the support (130) comprises a male relief (216) received in a sliding manner in the female relief (131).

5. Device (10) according to any one of the preceding claims, wherein the ventilation means (220) comprises a radial fan.

6. Device (10) according to the preceding claim, wherein the airflow (FA) crosses the droplet jet (JG) perpendicularly or substantially perpendicularly.

7. Device (10) according to any one of the preceding claims, wherein the lower part (200) comprises a power supply means (240) configured to electrically supply the ventilation means (220) and / or the misting means (120).

8. Device (10) according to any one of the preceding claims, wherein the lower part (200) comprises a control module (230) configured to control the ventilation means (220) and the misting means (120).

9. Device (10) according to any one of the preceding claims, wherein the lower part (200) comprises a lower housing (250) which at least partially covers the ventilation means (220).

10. Device (10) according to any one of the preceding claims, wherein the upper part (100) comprises one or more flaps (140) configured to direct the droplet jet (JG) towards the airflow (FA) in the operating configuration (CU).