Systems, methods, and devices for drying hair

Abstract

A method of drying hair comprising heat simultaneously through a conductive heat source and a convective heat source, monitoring a property associated with the hair drying and adjusting a parameter of the conductive or convective heat source based on the detected property. Heat may be applied for 60 seconds or less and the conductive heat source may have separating members for separating hair strands which increase a surface area for the conductive heating. The convective heating may be a heated airflow at a temperature of 150 °C with a volumetric flow rate of 15 litres per second or lower. Adjusting the parameters may include a temperature or airflow speed change based on a measured moisture level. User preferences, contextual data or geolocation data may also be used to adjust settings. The method may use a heated hairbrush and a hairdryer. Data processing may be done on a personal device.

Description

BACKGROUND Users of haircare tools may apply heat to their hair for the purpose of drying and / or styling their hair. Different haircare tools may be used consecutively to apply heat in different modalities according to the user’s needs. SUMMARY In a general sense, the present invention provides methods, systems and devices that achieve a more efficient process for drying hair by adaptively applying both conductive and convective heat to hair to achieve a desired hair outcome. For example, the methods, systems, and devices described herein may provide dryer hair and / or a quicker drying of hair and / or a more desirable dryness / style outcome for the user of the systems and devices described herein. There is provided a method of drying hair. The method comprises applying heat by a conductive heat source to the hair; simultaneously with the applying heat by the conductive heat source, applying heat by a convective heat source to the hair; monitoring one or more properties associated with the drying of the hair, and adjusting one or more parameters of the conductive heat source and / or the convective heat source based on the monitoring. In some examples, the monitoring one or more properties associated with the drying of the hair may also be carried out simultaneously (or, at least in part, simultaneously - i.e., overlapping) with the simultaneously applying heat by the conductive and convective heat sources. Applying heat by a conductive heat source may be understood to mean applying conductive heat to the hair. Applying heat by a conductive heat source may involve putting a heated device in physical contact with the hair such that heat generated by the heated device is transferred into the hair by the process of conduction. Putting the heated device in physical contact with the hair may involve putting a heating element of the heated device in direct physical contact with the hair. Alternatively, the heating element may be shielded from direct physical contact with the hair and may - in such cases, a shielding layer may be disposed between the heating element and the hair to reduce the risk of burning the hair. The shielding layer may be the element of the heated device that is put into direct physical contact with the hair such that heat generated by the heating element is transferred into the hair by conduction via the shielding layer. In some examples, the shielding layer may be a surrounding layer fully or partially enclosing the heating element. In other examples, the shielding layer may not be a layer enclosing the heating element at all but rather any suitable physical structure forming a barrier between the heating element and the hair when the heated device is put into contact with (i.e., applied to) the hair. Applying heat by a convective heat source may be understood to mean applying convective heat to the hair. Applying heat by a convective heat source may involve directing an airflow towards the hair such that heat entrained within the airflow is transferred into the hair. In some examples, the airflow may lift water away from the hair, entrain the water within the airflow as water vapour and carry the water (in the form of water vapour) away from the hair, thereby drying the hair. In some examples, the airflow may be a heated airflow, i.e., heated to a temperature greater than room temperature. Alternatively, the airflow may not be a heated airflow, or may even by a ‘cold’ airflow. A cold airflow may be understood as being an airflow that has been chilled relative to room temperature, i.e., the temperature of the airflow may be less than room temperature. In some examples, applying heat by a convective heat source may include generating the airflow, and subsequently directing the generated airflow towards the hair as described above. The one or more properties associated with the drying of the hair may include intrinsic properties of the hair. These intrinsic properties may include, for example, any one or more of: a water content value of the hair (e.g., a percentage of the overall hair mass that is made up by water), a relative moisture value of the hair (e.g., relative to the humidity of the air), and / or a temperature of the hair. Additionally or alternatively, the one or more properties associated with the drying of the hair may include contextual properties associated with the user and / or environment. For example, the contextual properties may include any one or more of: one or more user preferences input by a user of the conductive and convective heat sources, contextual user contextual properties associated with the user, and / or contextual properties associated with a geolocation of the user. The method described herein may provide the user with several benefits including: a reduction in the amount of time needed to dry and style hair, an increase in the efficiency (e.g., in terms of energy consumption) of the systems and devices used to carry out the method, and / or an more desirable hair outcome for the user (e.g., a longer-lasting hairstyle, a more aesthetically pleasing hairstyle, and / or a greater degree of user control over the resulting hairstyle). In some examples, the efficiency of the devices associated with the methods described herein may be improved relative to previous approaches. For example, the efficiency of the method may be 3 times greater than current methods. Efficiency of a drying method may be understood to be an indicator of a ratio between a theoretical amount of energy needed to heat the hair and an actual amount of energy used to heat the hair by the same amount. For example, the efficiency of the drying method may be derived by calculating the theoretical minimum amount of energy to raise the temperature of hair &water to the device temperature &evaporate the water from ambient, this is then divided by the measured amount of energy used to dry the hair &remove the water. In some embodiments, the method may comprise applying heat by the conductive heat source and convective heat source for 60 seconds or less. Alternatively, in some examples, the method may comprise applying heat by the conductive heat source and convective heat source for 180 seconds or less, 150 seconds or less, 120 seconds or less, 90 seconds or less, 45 seconds or less, or 30 seconds or less. In some examples, the method may comprise applying heat by the conductive heat source and convective heat source for 30 seconds or more, 45 seconds or more, 90 seconds or more, 120 seconds or more, 150 seconds or more, or 180 seconds or more. In some examples, the method may comprise applying heat by the conductive heat source and convective heat source for between 30 and 180 seconds, 30 and 150 seconds, 30 and 120 seconds, 30 and 90 seconds, 30 and 60 seconds, 30 and 45 seconds, 45 and 180 seconds, 45 and 150 seconds, 45 and 120 seconds, 45 and 90 seconds, 45 and 60 seconds, 60 and 180 seconds, 60 and 150 seconds, 60 and 120 seconds, 60 and 90 seconds, 90 and 180 seconds, 90 and 150 seconds, 90 and 120 seconds, 120 and 180 seconds, 120 and 150 seconds, or 150 and 180 seconds. Alternatively, the application of the method may be limited by reference to the number of ‘passes’ of the conductive and convective heat sources. A ‘pass’ may be understood to comprise an application of the conductive heat source and the convective heat source (e.g., for 3 seconds), with a gap between each pass (e.g., a gap of 2 seconds). In some examples, the method may comprise applying heat by the conductive heat source and the convective heat source for 50 passes or less, 40 passes or less, 30 passes or less, 20 passes or less, 15 passes or less, or 10 passes or less. In some examples, the method may comprise applying heat by the conductive heat source and the convective heat source for 10 passes or more, 15 passes or more, 20 passes or more, 30 passes or more, 40 passes or more, or 50 passes or more. In some examples, the method may comprise applying heat by the conductive heat source and the convective heat source for between 10 and 50 passes, 10 and 40 passes, 10 and 30 passes, 10 and 20 passes, 10 and 15 passes, 15 and 50 passes, 15 and 40 passes, 15 and 30 passes, 15 and 20 passes, 20 and 50 passes, 20 and 40 passes, 20 and 30 passes, 30 and 50 passes, 30 and 40 passes, or 40 and 50 passes. In some embodiments, the conductive heat source may comprise a plurality of separating members for separating strands of the hair to be dried. The method may further comprise applying the separating members of the conductive heat source to the hair to separate strands of the hair, thereby increasing a heating surface area of the hair that is directly heatable by the conductive heat source. In this way, heat transferred into the hair by conduction may be transferred more efficiently. In some examples, one or more of the separating members may include a respective heating element. In other words, one or more of the separating members may be configured to apply heat to the hair by conduction themselves. Alternatively, in some examples, any heating elements of the conductive heat source may be separate and distinct from the one or more separating members. In other words, the separating members may be configured to separate strands of the hair to increase a heating surface area of the hair that is able to be put in contact with the heating element(s) of the conductive heat source. The plurality of separating members may comprise any suitable physical structure for separating strands of the hair. For example, the plurality of separating members may include tines of a hairbrush arranged to separate strands of the hair (e.g., a hairbrush comprising a heating element such that the hairbrush may be the conductive heat source). Additionally or alternatively, the plurality of separating members may include a pair of ironing plates of a hair straightener arranged to splay, and thereby separate, strands of the hair upon application of the hair straightener to the hair. In some embodiments, applying heat by the convective heat source may comprise generating a heated airflow and applying the heated airflow to the hair to heat the hair by convection and to carry, by the airflow, water away from the hair. In some examples, generating and applying the heated airflow may be achieved by a hairdryer or other similar haircare tool. In some embodiments, the generated heated airflow may have a temperature of 150°C or lower. Alternatively, in some examples, the generated heated airflow may have a temperature of 180°C or less, 120°C or less, 100°C or less, 80°C or less, or60°C or less. In some examples, the generated heated airflow may have a temperature of 60°C or more, 80°C or more, 100°C or more, 120°C or more, or 150°C or more. In some examples, the generated heated airflow may have a temperature between 60 and 180°C, between 60 and 150°C, between 60 and 120°C, between 60 and 100°C, between 60 and 80°C, between 80 and 180°C, between 80 and 150°C, between 80 and 120°C, between 80 and 100°C, between 100 and 180°C, between 100 and 150°C, between 100 and 120°C, between 120 and 180°C, or between 120 and 150°C. In a particular example, the generated heated airflow may be applied with an initial temperature of 145°C. In some embodiments, the generated heated airflow may have a volumetric flow rate of 15 litres per second or lower. Alternatively, in some examples, the generated heated airflow may have a volumetric flow rate of 25 litres per second or lower, 15 litres per second or lower, 10 litres per second or lower, or 5 litres per second or lower. In some examples, the generated heated airflow may have a volumetric flow rate of 5 litres per second or more, 10 litres per second or more, 15 litres per second or more, 20 litres per second or more, or 25 litres per second or more. In some examples, the generated heated airflow may have a volumetric flow rate of between 5 and 25 litres per second, between 5 and 20 litres per second, between 5 and 15 litres per second, between 5 and 10 litres per second, between 10 and 25 litres per second, between 10 and 20 litres per second, between 10 and 15 litres per second, between 15 and 25 litres per second, between 15 and 20 litres per second, or between 20 and 25 litres per second. In a particular example, the generated heated airflow may have a volumetric flow rate of 13 litres per second. The volumetric flow rate of the generated heated airflow may be considered to be a metric indicative of the heated airflow. In some embodiments, applying heat by the conductive heat source may comprise heating a heating element of the conductive heat source to a temperature of 150°C or lower. Alternatively, in some examples, applying heat by the conductive heat source may comprise heating a heating element of the conductive heat source to a temperature of 180°C or less, 120°C or less, 100°C or less, 80°C or less, or 60°C or less. In some examples, applying heat by the conductive heat source may comprise heating a heating element of the conductive heat source to a temperature of 60°C or more, 80°C or more, 100°C or more, 120°C or more, or 150°C or more. In some examples, applying heat by the conductive heat source may comprise heating a heating element of the conductive heat source to a temperature between 60 and 180°C, between 60 and 150°C, between 60 and 120°C, between 60 and 100°C, between 60 and 80°C, between 80 and 180°C, between 80 and 150°C, between 80 and 120°C, between 80 and 100°C, between 100 and 180°C, between 100 and 150°C, between 100 and 120°C, between 120 and 180°C, or between 120 and 150°C. In a particular example, applying heat by the conductive heat source may comprise heating a heating element of the conductive heat source to a temperature of 130°C. In a particular example, the heating element may be configured to have an operating temperature range between 90 and 140°C in use. In some examples, the temperature of the heat applied by the conductive heat source may be less than the temperature of the heat applied by the convective heat source. In some examples, the temperature of the heat applied by the conductive heat source may be more than the temperature of the heat applied by the convective heat source. In some examples, the temperature of the heat applied by the conductive heat source may be the same as the temperature of the heat applied by the convective heat source. In some embodiments, the adjusting of the one or more parameters may be automatically performed in response to the monitoring. In some examples, the monitoring of the one or more properties associated with the drying of the hair may be monitored, at least in part, by one or more sensors. Data collected by the one or more sensors may be transmitted to a processor for analysis. The processor may be on the same device or tool as the device or tool that comprises the one or more sensors. Alternatively, in some examples, the processor may be on a different device (i.e., be remote from) the device or tool that comprises the one or more sensors. In some examples, the one or more sensors may comprise a plurality of sensors distributed amongst a plurality of devices or tools. In some examples, the processor may be configured to generate instructions for adjusting the one or more parameters of the conductive heat source and / or the convective heat source in response to determining, by the analysis, that any one (or combination) of the one or more monitored properties have satisfied a criterion. In some examples, the criterion may be one of a plurality of criteria. One or more of the criteria (or the criterion in cases where the criterion is a sole criterion) may be a threshold that any one (or combination) of the one or more monitored properties may exceed or fall below. In some examples, one or more of the criteria (or criterion) may be predetermined. Additionally or alternatively, one or more of the criteria (or criterion) may be determined in response to input from a user of the methods described herein. For example, the method may include instructing, by a processor, the automatic lowering the temperature of the heat applied by the conductive heat source and / or the convective heat source in response to a measured moisture level of the hair falling below a predetermined threshold (e.g., below a water content percentage of 20%). In some embodiments, adjusting one or more parameters of the conductive heat source and / or the convective heat source may comprise adjusting one or more of: a temperature of a heating element of the conductive heat source, an airflow speed of an airflow generated by the convective heat source, and / or a temperature of an airflow generated by the convective heat source. Additionally or alternatively, the one or more adjustable parameters may include one or more of: in the case of a conductive heat source defined by multiple devices, the temperature of the heat applied by any one (or combination of) said devices; or in the case of a convective heat source defined by multiple devices, the temperature and / or airflow speed of the respective airflows generated by any one (or combination of) said devices. Additionally or alternatively, the one or more adjustable parameters may include a spatial profile, or shape of the generated airflow - for example, a shape of a cross-section of the airflow. The cross-section may be a transverse and / or a longitudinal cross-section. In some examples, powered dynamic attachments may be added to the convective heat source to facilitate modification of the shape of the generated airflow (e.g., an air jet ejected from the convective heat source) to change a parameter of the drying of the hair, such as a drying rate. In some embodiments, adjusting one or more parameters of the conductive heat source and / or the convective heat source may be based on a measured moisture level of the hair. In other words, the one or more parameters of the conductive heat source and / or the convective heat source may be adjusted in response to variations in the measured moisture level of the hair. The measured moisture level of the hair may, for example, be a measurement of the percentage of the hair mass that is water. This may, for example, be defined by the equation: 100 X (mhair-mdry) / mdry where mhair is a mass of the wet hair, and mdry is a mass of the same hair when bone dry. Alternatively, the measured moisture level of the hair may be measured by a moisture sensor configured to measure the moisture of the hair relative to the relative humidity, Rh, of the atmosphere at a preset temperature (e.g., a temperature of 23°C). It may be preferable to measure the moisture level of the hair by reference to relative humidity as this does not require the hair to be weighed during application of the methods described herein. In some examples, the water content value of the hair may correspond non-linearly with the moisture level measured in terms of relative humidity. For example, a water content percentage of 12.2% may correspond to a moisture level of 50% in terms of relative humidity, while a water content percentage of 18% may correspond to a moisture level of 80% in terms of relative humidity. Additionally or alternatively, one or more other properties of the hair may be monitored, and the parameters of the conductive heat source and / or convective heat source may be adjusted in response to variations in those one or more other properties. The one or more other properties may include a temperature of the hair, and / or a colour of the hair. For example, darker hair may be indicative that the hair is wetter in some cases. In some embodiments, adjusting the one or more parameters of the conductive heat source and / or the convective heat source may be based on one or more of: one or more user preferences input by a user of the conductive heat source and the convective heat source; contextual user data indicative of one or more contextual properties associated with the user; and / or contextual geolocation data indicative of one or more contextual properties associated with a geolocation of the user. The one or more user preferences may include one or more preferences indicative of, for example, a desired hair outcome of the methods described herein. For example, the user may indicate a desired appearance of the hair after applying the methods described herein. Preferences relating to the appearance may include a preference for one or more of the shininess, smoothness, straightness, and / or apparent volume of the hair. Additionally or alternatively, the user may indicate a desired degree of movement in the hair after applying the methods described herein. Preferences relating to the movement in the air may include a preference for the staticity and / or suppleness of the hair. Additionally or alternatively, the user may indicate a desired feel for the hair after applying the methods described herein. Preferences relating to the feel of the hair may include a preference for one or more of the softness, the feeling of the degree to which the hair has been conditioned / moisturised, the smoothness, the density and / or the feeling of the extent to which the hair suffers from dry ends. The contextual properties associated with the user may, for example, include one or more demographic properties of the user. For example, the contextual user data may be indicative of an age of the user, an ethnicity demographic of the user, and / or a sex of the user. Additionally or alternatively, the contextual user data may include information indicative of the amount of hair treatment that the user has undergone (e.g., a history of the user dyeing their hair, curling their hair for example, with ammonium thioglycol ate, straightening their hair, bleaching their hair, and / or subjecting their hair to heat treatments). Additionally or alternatively, the contextual user data may include information indicative of relevant medical conditions, for example alopecia, that may affect the user’s hair condition. The contextual properties associated with the geolocation of the user may, for example, include one or more properties of the geolocation that may impact the user’s hair condition. For example, the geolocation data may include (e.g., via weather reports or similar) information indicative of a relative humidity of the geolocation that the user is in. Additionally or alternatively, the geolocation data may include information indicative of a weather forecast including, for example information relating to any one or more of: precipitation, wind speed, humidity, and / or temperature at the geolocation of the user. The user’s geolocation may be determined, for example, by collecting GPS data from a personal device in the user’s possession (e.g., a mobile phone, tablet, or similar device). In some embodiments, the method may further comprise collecting, by a processor, data indicative of one or more of: a measured moisture level of the hair, one or more user preferences input by a user of the conductive heat source and the convective heat source, one or more contextual properties associated with the user, and / or one or more contextual properties associated with the user, and / or one or more contextual properties associated with a geolocation of the user. The method may further comprise analysing the collected data; and generating a set of instructions to adjust the one or more parameters of the conductive heat source and / or the convective heat source. In other words, the processor may be configured to generate instructions - in response to information derived from received data - that facilitates the user achieving a desired hair outcome. The instructions may be generated in response to the data indicating that any of the parameters subject to analysis by the processor satisfy one or more criteria. Any one or more of the one or more criteria may be predetermined. Additionally or alternatively, any one or more of the one or more criteria may be set by the user of the methods described herein, for example via a user interface. Additionally or alternatively, any one or more of the criteria may depend on a single parameter or on any combination of the measured parameters indicated in the received data. Additionally or alternatively, any one or more of the one or more criteria may be in the form of a threshold. In some embodiments, the conductive heat source may include a hairbrush. The hairbrush may comprise a heating element for applying heat to the hair by conduction. In some examples, one or more of the tines of the hairbrush may comprise respective heating elements for heating the hair. Alternatively, the heating element of the hairbrush may be mounted in the paddle of the hairbrush, separate from the tines. In some examples, the hairbrush may comprise a moisture sensor mounted thereon configured to measure the moisture level of the hair. In some examples, the temperature of the heating element may be manually adjustable by the user. Additionally or alternatively, the heating element may be automatically adjustable via a microcontroller mounted on or in the hairbrush. The microcontroller may be communicatively linked to a processor on another device (e.g., a personal device of the user) and may be configured to receive instructions from the processor to adjust the temperature of the heating element. Additionally or alternatively, the microcontroller may be configured to transmit instructions (directly or indirectly) to processors and / or microcontrollers mounted on other devices to adjust one or more operating parameters of those other devices. In some embodiments, the convective heat source may include a hairdryer. The hairdryer may be configured to generate a heated airflow for applying heat to the hair by convection. In some examples, the hairdryer may be the Dyson ® Supersonic ® hairdryer. In some examples, the hairdryer may comprise a moisture sensor mounted thereon configured to measure the moisture level of the hair. In some examples, the airflow temperature and / or airflow speed of the airflow generated by the hairdryer may be manually adjustable by the user. Additionally or alternatively, the temperature and / or speed of the generated airflow may be automatically adjustable via a microcontroller mounted on or in the hairdryer. The microcontroller may be communicatively linked to a processor on another device (e.g., a personal device of the user) and may be configured to receive instructions from the processor to adjust the temperature and / or speed of the generated airflow. Additionally or alternatively, the microcontroller may be configured to transmit instructions (directly or indirectly) to processors and / or microcontrollers mounted on other devices to adjust one or more operating parameters of those other devices. In some embodiments, the conductive heat source and / or the convective heat source may further comprise a device for styling hair. The device may include a heat source for applying heat to the hair by conduction and / or convection. For example, the conductive heat source may include hair straighteners (e.g., the Dyson® Corrale ® straighteners), and / or curling irons. Additionally or alternatively, a device configured to apply both conductive and convective heat may embody at least a part of each of the conductive heat source and the convective heat source. For example, such a device may be the Dyson® AirWrap ® device. Additionally or alternatively, such a device may be a device configured to straighten hair by the application of heated airflow together with heated plates. Such a device may be the Dyson ® AirStrait ® device. There is also provided a system for drying hair. The system comprises a conductive heat source configured to apply heat to the hair by conduction; and a convective heat source configured to apply heat to the hair by convection. The system is configured to carry out the methods described herein. As discussed above, the conductive hair source may be any device or tool that is configured to transfer heat to the hair by conductive processes. Similarly, the convective hair source may be any device or tool that is configured to transfer heat to the hair by convective processes. As discussed above, in some examples, the conductive heat source may comprise a plurality of separating members for separating strands of the hair to be dried. In some examples, one or more of the separating members may include a respective heating element. In other words, one or more of the separating members may be configured to apply heat to the hair by conduction themselves. Alternatively, in some examples, any heating elements of the conductive heat source may be separate and distinct from the one or more separating members. In other words, the separating members may be configured to separate strands of the hair to increase a heating surface area of the hair that is able to be put in contact with the heating element(s) of the conductive heat source. The plurality of separating members may comprise any suitable physical structure for separating strands of the hair. For example, the plurality of separating members may include tines or bristles of a hairbrush arranged to separate strands of the hair (e.g., a hairbrush comprising a heating element such that the hairbrush may be the conductive heat source). Additionally or alternatively, the plurality of separating members may include a pair of ironing plates of a hair straightener arranged to splay, and thereby separate, strands of the hair upon application of the hair straightener to the hair. As discussed above, in some examples, the conductive heat source may include a hairbrush. The hairbrush may comprise a heating element for applying heat to the hair by conduction. In some examples, one or more of the tines of the hairbrush may comprise respective heating elements for heating the hair. Alternatively, the heating element of the hairbrush may be mounted in the paddle of the hairbrush, separate from the tines. In some examples, the temperature of the heating element may be manually adjustable by the user. Additionally or alternatively, the heating element may be automatically adjustable via a microcontroller, which may be mounted on or in the hairbrush. The microcontroller may be communicatively linked to a processor on another device (e.g., a personal device of the user) and may be configured to receive instructions from the processor to adjust the temperature of the heating element. Additionally or alternatively, the microcontroller may be configured to transmit instructions (directly or indirectly) to processors and / or microcontrollers mounted on other devices to adjust one or more operating parameters of those other devices. As discussed above, in some examples, the convective heat source may include a hairdryer. The hairdryer may be configured to generate a heated airflow for applying heat to the hair by convection. In some examples, the hairdryer may be the Dyson® Supersonic ® hairdryer. In some examples, the airflow temperature and / or airflow speed of the airflow generated by the hairdryer may be manually adjustable by the user. Additionally or alternatively, the temperature and / or speed of the generated airflow may be automatically adjustable via a microcontroller mounted on or in the hairdryer. The microcontroller may be communicatively linked to a processor on another device (e.g., a personal device of the user) and may be configured to receive instructions from the processor to adjust the temperature and / or speed of the generated airflow. Additionally or alternatively, the microcontroller may be configured to transmit instructions (directly or indirectly) to processors and / or microcontrollers mounted on other devices to adjust one or more operating parameters of those other devices. As discussed above, the conductive heat source and / or the convective heat source may further comprise a device for styling hair. The device may include a heat source for applying heat to the hair by conduction and / or convection. For example, the conductive heat source may include straighteners (eg., the Dyson® Corrale ® straighteners), and / or curling irons. Additionally or alternatively, a device configured to apply both conductive and convective heat may embody at least a part of each of the conductive heat source and the convective heat source. For example, such a device may be the Dyson® AirWrap ® device. Additionally or alternatively, such a device may be a device configured to straighten hair by the application of heated airflow together with heated plates. Such a device may be the Dyson ® AirStrait ® device. In some embodiments, the system may further comprise one or more moisture sensors configured to measure a moisture level of the hair. At least one of the one or more moisture sensors may be mounted on the conductive heat source or the convective heat source. For example, when the conductive heat source includes a hairbrush, the hairbrush may comprise a moisture sensor mounted thereon configured to measure the moisture level of the hair. Similarly, when the convective heat source includes a hairdryer, the hairdryer may comprise a moisture sensor mounted thereon configured to measure the moisture level of the hair. In some examples, at least one of the one or more moisture sensors may be a hyperspectral imaging photo diode. The signal for such a diode may require calibration and / or preprocessing and / or processing against a relevant calibration curve. Additionally or alternatively, at least one of the one or more moisture sensors may be configured to measure a capacitance of moist air whose water content has been increased by virtue of proximity to wet hair. The signal captured by this capacitance measurement may also require calibration and / or pre-processing or processing against a relevant calibration curve. Additionally or alternatively, at least one of the one or more moisture sensors may be a contact capacitive sensor that is operable as a touch sensor configured to measure a capacitance and therefore a moisture content of the hair directly. Such a sensor may require similar calibration to the other configurations for moisture sensors, as described above. In some embodiments, the system may further comprise a processor configured to generate instructions for controlling an operation of the conductive heat source and / or the convective heat source. In some embodiments, the processor may be installed in a personal device associated with a user of the system. The instructions may be generated based on one or more inputs, by the user, to a user interface of the personal device. In some embodiments, the processor may be configured to implement an application on the personal device to receive input from the user and / or provide the user with instructions for using the conductive heat source and / or the convective heat source. In some example, more than one device in the system may comprise a processor mounted thereon. In such cases, one or more of the processors may be communicatively linked with others of the plurality of the processors. In such examples, one processor may be designated to be the ‘master’ processor configured to generate instructions to be executed by the processors on the other devices. The processors on the other devices may, therefore, be conversely designated as ‘slave’ processors configured to receive and execute instructions from the master processor. There is provided a system for drying hair. The system comprises one or more haircare tools configured to dry and / or style hair; one or more moisture sensors configured to measure a moisture level of the hair; and a processor configured to adjust one or more parameters of the one or more haircare tools based on the measured moisture level of the hair. Any of the systems described herein, including the abovementioned system, may be suitable for use by a user for carrying out any of the methods described herein. Haircare tools may be understood to refer to any personal items useable by a person for the drying and / or styling of their hair. Haircare tools may include any one or more of: a hairbrush, a hairdryer such as the Dyson® Supersonic ®, straighteners (equivalently referred to as straightening irons) such as the Dyson® Corrale ® straightener, curlers (equivalently referred to as curling irons), or any other suitable device - e.g., the Dyson® AirWrap ® device or the Dyson ® AirStrait ® device. Drying and styling the hair may be considered to be two separate processes carried out independently of one another. Alternatively, drying and styling the hair may be considered to be two phases of a single haircare process wherein - in a first phase - wet hair is dried, and - in a second phase - the (at least partially) dried hair is styled. The drying phase may involve some styling of the hair but may be primarily dedicated to drying wet hair. Similarly, the styling phase may involve some drying of the hair but may be primarily dedicated to styling (at least partially) dried hair. As discussed above, the measured moisture level, as measured by the one or more moisture sensors may be a measurement of the percentage of the hair mass that is water. Additionally or alternatively, one or more of the one or more moisture sensors may be configured to measure the moisture of the hair relative to the relative humidity, Rh, of the atmosphere at a preset temperature (e.g., a temperature of 23°C). Additionally or alternatively, the system may further comprise one or more other sensors configured to respective measure one or more other properties of the hair. The one or more other properties may, for example, include any one or more of: the temperature of the hair and / or a colour of the hair, as described above. In some examples, one or more of the moisture sensors may be mounted on any one or more of the one or more haircare tools. Additionally or alternatively, one or more of the moisture sensors may be mounted on their own separate device(s) configured solely, or predominantly, for the measurement of the moisture level of the hair. In some examples, one or more of the one or more haircare tools may be powered haircare tools. Powered haircare tools may be understood to be haircare tools that require an electrical supply to operate with full functionality. The electrical supply may be realised either by a battery or by connection to the mains electrical supply via a lead and socket. In some examples, the processor may be installed in a personal user device (e.g., a phone or tablet) that forms part of the system. Alternatively, the processor may be installed on or in one of the one or more haircare tools. In such examples, the processor may optionally be embodied as a microcontroller. In some examples, more than one device in the system may comprise a processor mounted thereon. In such cases, one or more of the processors may be communicatively linked with others of the plurality of the processors. In such examples, one processor may be designated to be the ‘master’ processor configured to generate instructions to be executed by the processors on the other devices. The processors on the other devices may, therefore, be conversely designated as ‘slave’ processors configured to receive and execute instructions from the master processor. In some examples, adjusting one or more parameters of the one or more haircare tools based on the measured moisture level of the hair may be understood to include adjusting one or more parameters of the one or more haircare tools in response to the measured moisture level satisfying a criterion. The satisfied criterion may be one of one or more criteria. In some examples, one or more of the one or more criteria may be a threshold above which or the below which the measured moisture level may reach. In some embodiments, the one or more haircare tools may include a hairbrush comprising a heating element. The hairbrush may be configured to apply heat to the hair by conduction. In some examples, one or more of the tines of the hairbrush may comprise respective heating elements for heating the hair. Alternatively, the heating element of the hairbrush may be mounted in the paddle of the hairbrush, separate from the tines. In some examples, the hairbrush may comprise a moisture sensor mounted thereon configured to measure the moisture level of the hair. In some embodiments, the heating element may be configured to be heatable, when in use, to a temperature of up to 150°C. In other words, the hairbrush may be operable with the heating element being heated to a temperature of up to 150°C. Alternatively, in some examples, the heating element may be configured to be heatable, when in use, to a temperature of 180°C or less, 120°C or less, 100°C or less, 80°C or less, or 60°C or less. In some examples, the heating element may be configured to be heatable, when in use, to a temperature of 60°C or more, 80°C or more, 100°C or more, 120°C or more, or 150°C or more. In some examples, the heating element may be configured to be heatable, when in use, to a temperature between 60 and 180°C, between 60 and 150°C, between 60 and 120°C, between 60 and 100°C, between 60 and 80°C, between 80 and 180°C, between 80 and 150°C, between 80 and 120°C, between 80 and 100°C, between 100 and 180°C, between 100 and 150°C, between 100 and 120°C, between 120 and 180°C, or between 120 and 150°C. In a particular example, the heating element may be configured to be heatable, when in use, to a temperature of 130°C in use. In a particular example, the heating element may be configured to have an operating temperature range between 90 and 140°C in use. In some embodiments, the processor may be configured to adjust a temperature of the heating element based on the measured moisture level of the hair. In other words, the processor may be configured to instruct a change in the temperature of the heating element in response to the measured moisture level satisfying a criterion. As discussed above, the criterion may be one of one or more criteria, and any of the one or more criteria may be a respective threshold. In some examples, the temperature of the heating element may be manually adjustable by the user. Additionally or alternatively, the heating element may be automatically adjustable via a microcontroller mounted on or in the hairbrush. The microcontroller may be the processor described above. Alternatively, the microcontroller may be communicatively linked to the processor that is mounted on another device (e.g., a personal device of the user) and may be configured to receive instructions from the processor to adjust the temperature of the heating element. Additionally or alternatively, the microcontroller may be configured to transmit instructions (directly or indirectly) to processors and / or microcontrollers mounted on other devices to adjust one or more operating parameters of those other devices. In some embodiments, the one or more haircare tools may include a hairdryer configured to generate a heated airflow to apply heat to the hair by convection. In some examples, the hairdryer may be further configured to generate an airflow that is not a heated airflow, or may even be a ‘cold’ airflow, as described above. In some examples, the hairdryer may be the Dyson® Supersonic ® hairdryer. In some examples, the hairdryer may comprise a moisture sensor mounted thereon configured to measure the moisture level of the hair. In some examples, the one or more haircare tools may include a device configured to apply both conductive heat and convective heat to the hair. For examples, such a device may be the AirWrap ® device. In some embodiments, the generated heated airflow may have a temperature of up to 150°C, and / or may have a volumetric flow rate of up to 15 litres per second. Alternatively, in some examples, the generated heated airflow may have a temperature of 180°C or less, 120°C or less, 100°C or less, 80°C or less, or 60°C or less. In some examples, the generated heated airflow may have a temperature of 60°C or more, 80°C or more, 100°C or more, 120°C or more, or 150°C or more. In some examples, the generated heated airflow may have a temperature between 60 and 180°C, between 60 and 150°C, between 60 and 120°C, between 60 and 100°C, between 60 and 80°C, between 80 and 180°C, between 80 and 150°C, between 80 and 120°C, between 80 and 100°C, between 100 and 180°C, between 100 and 150°C, between 100 and 120°C, between 120 and 180°C, or between 120 and 150°C. In a particular example, the generated heated airflow may be applied with an initial temperature of 145°C. Additionally or alternatively, in some examples, the generated heated airflow may have a volumetric flow rate of 25 litres per second or lower, 15 litres per second or lower, 10 litres per second or lower, or 5 litres per second or lower. In some examples, the generated heated airflow may have a volumetric flow rate of 5 litres per second or more, 10 litres per second or more, 15 litres per second or more, 20 litres per second or more, or 25 litres per second or more. In some examples, the generated heated airflow may have a volumetric flow rate of between 5 and 25 litres per second, between 5 and 20 litres per second, between 5 and 15 litres per second, between 5 and 10 litres per second, between 10 and 25 litres per second, between 10 and 20 litres per second, between 10 and 15 litres per second, between 15 and 25 litres per second, between 15 and 20 litres per second, or between 20 and 25 litres per second. In a particular example, the generated heated airflow may have a volumetric flow rate of 13 litres per second. In some embodiments, the processor may be configured to adjust a temperature and / or an airflow speed of the heated airflow generated by the hairdryer based on the measured moisture level of the hair. As discussed above, adjusting the airflow speed of the airflow may be understood to be equivalent to adjusting the volumetric flow rate of the airflow. The processor may be configured to instruct a change in the temperature and / or airflow speed of the generated heated airflow in response to the measured moisture level satisfying a criterion. As discussed above, the criterion may be one of one or more criteria, and any of the one or more criteria may be a respective threshold. In some examples, the airflow temperature and / or airflow speed of the airflow generated by the hairdryer may be manually adjustable by the user. Additionally or alternatively, the temperature and / or speed of the generated airflow may be automatically adjustable via a microcontroller (which may be the processor described above) mounted on or in the hairdryer. Additionally or alternatively, the microcontroller may be communicatively linked to the processor, as mounted on another device (e.g., a personal device of the user), and may be configured to receive instructions from the processor to adjust the temperature and / or speed of the generated airflow. Additionally or alternatively, the microcontroller may be configured to transmit instructions (directly or indirectly) to processors and / or microcontrollers mounted on other devices to adjust one or more operating parameters of those other devices. In some embodiments, the processor may be further configured to adjust the one or more parameters based on one or more of: one or more user preferences input by a user of the system; contextual user data indicative of one or more contextual properties associated with the user; and / or contextual geolocation data indicative of one or more contextual properties associated with a geolocation of the user. The one or more user preferences may includee one or more preferences indicative of, for example, a desired hair outcome of the methods described herein. For example, the user may indicate a desired appearance of the hair after applying the methods described herein. Preferences relating to the appearance may include a preference for one or more of the shininess, smoothness, straightness, and / or apparent volume of the hair. Additionally or alternatively, the user may indicate a desired degree of movement in the hair after applying the methods described herein. Preferences relating to the movement in the air may include a preference for the staticity and / or suppleness of the hair. Additionally or alternatively, the user may indicate a desired feel for the hair after applying the methods described herein. Preferences relating to the feel of the hair may include a preference for one or more of the softness, the feeling of the degree to which the hair has been conditioned / moisturised, the smoothness, the density and / or the feeling of the extent to which the hair suffers from dry ends. The contextual properties associated with the user may, for example, include one or more demographic properties of the user. For example, the contextual user data may be indicative of an age of the user, an ethnicity demographic of the user, and / or a sex of the user. Additionally or alternatively, the contextual user data may include information indicative of the amount of hair treatment that the user has undergone (e g., a history of the user dyeing their hair, curling their hair - for example, with ammonium thioglycolate, straightening their hair, bleaching their hair, and / or subjecting their hair to heat treatments). Additionally or alternatively, the contextual user data may include information indicative of relevant medical conditions, for example alopecia, that may affect the user’s hair condition. The contextual properties associated with the geolocation of the user may, for example, include one or more properties of the geolocation that may impact the user’s hair condition. For example, the geolocation data may include (e.g., via weather reports or similar) information indicative of a relative humidity of the geolocation that the user is in. Additionally or alternatively, the geolocation data may include information indicative of a weather forecast including, for example information relating to any one or more of: precipitation, wind speed, humidity, and / or temperature at the geolocation of the user. The user’s geolocation may be determined, for example, by collecting GPS data from a personal device in the user’s possession (e.g., a mobile phone, tablet, or similar device). The one or more user preferences and / or contextual properties associated with the user and / or geolocation of the user may be functionally processed as constraints by the processor that may place constraints on the operating ranges of the one or more parameters of the one or more haircare tools so as to ensure that the user of the system described herein achieves their desired hair outcome. In some embodiments, the processor may be installed in one of the one or more haircare tools. As discussed above, in some examples, more than one device in the system may comprise a processor mounted thereon. In such cases, one or more of the processors may be communicatively linked with others of the plurality of the processors. In such examples, one processor may be designated to be the ‘master’ processor configured to generate instructions to be executed by the processors on the other devices. The processors on the other devices may, therefore, be conversely designated as ‘slave’ processors configured to receive and execute instructions from the master processor. In some embodiments, the processor may be installed in a personal device of the user. In some examples, the personal deice may be a phone, tablet, or other similar device belonging to the user. In some embodiments, the one or more haircare tools may include one or more devices for styling hair. The one or more devices for styling hair may each include a heat source for applying heat to the hair by conduction and / or convection. For example, the one or more haircare tools may include straighteners (e.g., the Dyson® Corrale ® straighteners), and / or curling irons, and / or other devices such as the AirWrap ® device. There is also provided a hairbrush comprising a heating element for drying hair by applying heat to the hair by conduction; one or more moisture sensors configured to measure a moisture level of the hair; and a processor configured to adjust a temperature of the heating element based on the measured moisture level. In some examples, one or more of the tines of the hairbrush may comprise respective heating elements for heating the hair. Alternatively, the heating element of the hairbrush may be mounted in the paddle of the hairbrush, separate from the tines. In some embodiments, the processor may be configured to receive instructions from an external device, and to adjust the temperature of the heating element based on the received instructions. In some embodiments, the processor may be configured to adjust the temperature of the heating element in response to the measured moisture level rising above or falling below a predetermined threshold. For example, the processor may be configured to adjust the temperature of the heating element from a first temperature to a second, optionally higher, temperature in response to the measured moisture level of the hair falling below a predetermined water content percentage (e.g., 20%) or relative humidity level. In some examples, the predetermined water content may be 18% or lower (corresponding to a typical water content percentage considered just dry enough for the average user), 14% or lower (corresponding to a typical water content percentage considered to be truly dry for the average user), or 8% or lower (corresponding to a typical water content percentage that offers the user benefits such as a significant uplift in a styling outcome). In some embodiments, the heating element may be configured to be heatable, when in use, to a temperature of up to 150°C. In other words, the hairbrush may be operable with the heating element being heated to a temperature of up to 150°C. Alternatively, in some examples, the heating element may be configured to be heatable, when in use, to a temperature of 180°C or less, 120°C or less, 100°C or less, 80°C or less, or 60°C or less. In some examples, the heating element may be configured to be heatable to a temperature of 60°C or more, 80°C or more, 100°C or more, 120°C or more, or 150°C or more. In some examples, the heating element may be configured to be heatable to a temperature between 60 and 180°C, between 60 and 150°C, between 60 and 120°C, between 60 and 100°C, between 60 and 80°C, between 80 and 180°C, between 80 and 150°C, between 80 and 120°C, between 80 and 100°C, between 100 and 180°C, between 100 and 150°C, between 100 and 120°C, between 120 and 180°C, or between 120 and 150°C. In a particular example, the heating element may be configured to be heatable to a temperature of 130°C in use. In a particular example, the heating element may be configured to have an operating temperature range between 90 and 140°C in use. There is also provided a hairdryer comprising an airflow generator configured to generate a heated airflow for drying hair by applying heat to the hair by convection; one or more moisture sensors configured to measure a moisture level of the hair; and a processor configured to adjust one or more parameters of the airflow generator based on the measured moisture level. In some examples, the hairdryer may be further configured to generate an airflow that is not a heated airflow, or may even be a ‘cold’ airflow, as described above. In some examples, the hairdryer may be the Dyson® Supersonic ® hairdryer. In some examples, the hairdryer may comprise a moisture sensor mounted thereon configured to measure the moisture level of the hair. In some embodiments, the one or more parameters may include one or more of: a temperature of the generated heated airflow, and / or an airflow speed of the generated heated airflow. In some embodiments, the processor may be configured to receive instructions from an external device, and to adjust the one or more parameters of the airflow generator based on the received instructions. In some embodiments, the processor may be configured to adjust the one or more parameters of the airflow generator in response to the measured moisture level rising above or falling below a predetermined threshold. For example, the processor may be configured to adjust the temperature of the generated heated airflow from a first temperature to a second, optionally lower, temperature in response to the measured moisture level of the hair falling below a predetermined water content percentage (e.g., 20%) or relative humidity level. Additionally or alternatively, the processor may be configured to adjust the airflow speed of the generated heated airflow from a first airflow speed to a second, optionally higher, airflow speed in response to the measured moisture level of the hair falling below a predetermined water content percentage (e.g., 20%) or relative humidity level. In some examples, the predetermined water content may be 18% or lower (corresponding to a typical water content percentage considered just dry enough for the average user), 14% or lower (corresponding to a typical water content percentage considered to be truly dry for the average user), or 8% or lower (corresponding to a typical water content percentage that offers the user benefits such as a significant uplift in a styling outcome). In some embodiments, the generated heated airflow may have a temperature of up to 150°C, and / or a volumetric flow rate of up to 15 litres per second. Alternatively, in some examples, the generated heated airflow may have a temperature of 180°C or less, 120°C or less, 100°C or less, 80°C or less, or 60°C or less. In some examples, the generated heated airflow may have a temperature of 60°C or more, 80°C or more, 100°C or more, 120°C or more, or 150°C or more. In some examples, the generated heated airflow may have a temperature between 60 and 180°C, between 60 and 150°C, between 60 and 120°C, between 60 and 100°C, between 60 and 80°C, between 80 and 180°C, between 80 and 150°C, between 80 and 120°C, between 80 and 100°C, between 100 and 180°C, between 100 and 150°C, between 100 and 120°C, between 120 and 180°C, or between 120 and 150°C. In a particular example, the generated heated airflow may be applied with an initial temperature of 145°C. Additionally or alternatively, in some examples, the generated heated airflow may have a volumetric flow rate of 25 litres per second or lower, 15 litres per second or lower, 10 litres per second or lower, or 5 litres per second or lower. In some examples, the generated heated airflow may have a volumetric flow rate of 5 litres per second or more, 10 litres per second or more, 15 litres per second or more, 20 litres per second or more, or 25 litres per second or more. In some examples, the generated heated airflow may have a volumetric flow rate of between 5 and 25 litres per second, between 5 and 20 litres per second, between 5 and 15 litres per second, between 5 and 10 litres per second, between 10 and 25 litres per second, between 10 and 20 litres per second, between 10 and 15 litres per second, between 15 and 25 litres per second, between 15 and 20 litres per second, or between 20 and 25 litres per second. In a particular example, the generated heated airflow may have a volumetric flow rate of 13 litres per second. There is provided a computer-implemented method for operating a hair drying system. The hair drying system comprises one or more haircare tools and a user device communicatively connected to at least one of the haircare tools. The method comprises providing a user interface on the user device for receiving user input indicative of a desired hair condition to be obtained by using the hair drying system; and adjusting one or more parameters of the one or more haircare tools based on the user input to obtain the desired hair condition. In some examples, the user may indicate a desired appearance of the hair after using the haircare system, e.g., by implementing the methods described herein. Preferences relating to the appearance may include a preference for one or more of the shininess, smoothness, straightness, and / or apparent volume of the hair. Additionally or alternatively, the user may indicate a desired degree of movement in the hair after using the haircare system, e.g., by implementing the methods described herein. Preferences relating to the movement in the air may include a preference for the staticity and / or suppleness of the hair. Additionally or alternatively, the user may indicate a desired feel for the hair after using the haircare system, e.g., by implementing the methods described herein. Preferences relating to the feel of the hair may include a preference for one or more of the softness, the feeling of the degree to which the hair has been conditioned / moisturised, the smoothness, the density and / or the feeling of the extent to which the hair suffers from dry ends. Haircare tools may be understood to refer to any personal items useable by a person for the drying and / or styling of their hair. Haircare tools may include any one or more of: a hairbrush, a hairdryer such as the Dyson® Supersonic ®, straighteners (equivalently referred to as straightening irons) such as the Dyson® Corrale ® straightener, curlers (equivalently referred to as curling irons), or any other suitable device - e.g., the Dyson ® AirWrap ® device or the Dyson ® AirStrait ® device. The user device may be, for example, a personal user device such as a phone or tablet or another suitable device. In some examples, the user device may comprise a display suitable for displaying a graphical user interface with which the user can interact to carry out the methods described herein. The user interface may be provided by installing an application on the user device. For example, the application may be installed via communication with a server from which a copy of the application may be downloaded. The server may be accessed, for example, by scanning - with the user device - a barcode, QR code or similar. Additionally or alternatively, the server may be accessible via a secure password-based login, by two-factor authentication or via any other suitable security protocol. Adjusting one or more parameters of the one or more haircare tools may be understood to be carried out in response to the user input. In some examples, the user input may be used to implement one or more constraints on the operating ranges of one or more of the one or parameters. In some embodiments, the one or more haircare tools may include a conductive heat source. The conductive heat source may comprise a heating element configured to apply heat to the hair by conduction. Applying heat by a conductive heat source may involve putting a heated device in physical contact with the hair such that heat generated by the heated device is transferred into the hair by the process of conduction. Putting the heated device in physical contact with the hair may involve putting a heating element of the heated device in direct physical contact with the hair. Alternatively, the heating element may be shielded from direct physical contact with the hair and may - in such cases, a shielding layer may be disposed between the heating element and the hair to reduce the risk of burning the hair. The shielding layer may be the element of the heated device that is put into direct physical contact with the hair such that heat generated by the heating element is transferred into the hair by conduction via the shielding layer. In some examples, the shielding layer may be a surrounding layer fully or partially enclosing the heating element. In other examples, the shielding layer may not be a layer enclosing the heating element at all but rather any suitable physical structure forming a barrier between the heating element and the hair when the heated device is put into contact with (i.e., applied to) the hair. In some embodiments, adjusting the one or more parameters of the one or more haircare tools may comprise adjusting a temperature of the heating element. In some embodiments, the conductive heat source may be a hairbrush. In some examples, one or more of the tines of the hairbrush may comprise respective heating elements for heating the hair. Alternatively, the heating element of the hairbrush may be mounted in the paddle of the hairbrush, separate from the tines. In some examples, the hairbrush may comprise a moisture sensor mounted thereon configured to measure the moisture level of the hair. In some embodiments, the one or more haircare tools may include a convective heat source. The convective heat source may comprise an airflow generator configured to generate a heated airflow to apply heat to the hair by convection. Applying heat by a convective heat source may be understood to mean applying convective heat to the hair. Applying heat by a convective heat source may involve directing an airflow towards the hair such that heat entrained within the airflow is transferred into the hair. In some examples, the airflow may lift water away from the hair, entrain the water within the airflow as water vapour and carry the water (in the form of water vapour) away from the hair, thereby drying the hair. In some examples, the airflow may be a heated airflow, i.e., heated to a temperature greater than room temperature. Alternatively, the airflow may not be a heated airflow, or may even by a ‘cold’ airflow. A cold airflow may be understood as being an airflow that has been chilled relative to room temperature, i.e., the temperature of the airflow may be less than room temperature. In some examples, applying heat by a convective heat source may include generating the airflow, and subsequently directing the generated airflow towards the hair as described above. In some embodiments, adjusting the one or more parameters of the one or more haircare tools may comprise: adjusting a temperature and / or an airflow speed of the generated airflow. In some embodiments, the convective heat source may be a hairdryer. In some examples, the hairdryer may be further configured to generate an airflow that is not a heated airflow, or may even be a ‘cold’ airflow, as described above. In some examples, the hairdryer may be the Dyson® Supersonic ® hairdryer. In some examples, the hairdryer may comprise a moisture sensor mounted thereon configured to measure the moisture level of the hair. In some embodiments, the computer-implemented method may further comprise adjusting the one or more parameters of the one or more haircare tools based on one or more of: contextual user data indicative of one or more contextual properties associated with the user; and / or contextual geolocation data indicative of one or more contextual properties associated with a geolocation of the user. The contextual properties associated with the user may, for example, include one or more demographic properties of the user. For example, the contextual user data may be indicative of an age of the user, an ethnicity demographic of the user, and / or a sex of the user. Additionally or alternatively, the contextual user data may include information indicative of the amount of hair treatment that the user has undergone (e.g., a history of the user dyeing their hair, curling their hair - for example, with ammonium thioglycolate, straightening their hair, bleaching their hair, and / or subjecting their hair to heat treatments). Additionally or alternatively, the contextual user data may include information indicative of relevant medical conditions, for example alopecia, that may affect the user’s hair condition. The contextual properties associated with the geolocation of the user may, for example, include one or more properties of the geolocation that may impact the user’s hair condition. For example, the geolocation data may include (eg., via weather reports or similar) information indicative of a relative humidity of the geolocation that the user is in. Additionally or alternatively, the geolocation data may include information indicative of a weather forecast including, for example information relating to any one or more of: precipitation, wind speed, humidity, and / or temperature at the geolocation of the user. The user’s geolocation may be determined, for example, by collecting GPS data from a personal device in the user’s possession (e.g., a mobile phone, tablet, or similar device). Similar to the user input, the contextual user data and / or contextual geolocation data may be analysable by a processor to determine one or more constraints on the operating range(s) of the one or more parameters of the one or more haircare tools to ensure that the desired hair outcome is achieved by the user operating the hair drying system. In some embodiments, the computer-implemented method may further comprise receiving data indicative of a measured moisture level of the hair. As discussed above, the measured moisture level may correspond to a measured water content value of the hair, and / or a measured relative humidity of the hair relative to the atmosphere at a preset temperature (eg., 23°C). In some embodiments, the computer-implemented method may further comprise adjusting the one or more parameters of the one or more haircare tools based on the received data. In some embodiments, the computer-implemented method may further comprise adjusting the one or more parameters of the one or more haircare tools in response to a predetermined criterion. In some embodiments, the predetermined criterion may be an indication in the received data that the measured moisture level of the hair has risen above or fallen below a predetermined threshold. In some embodiments, the predetermined criterion may be an indication that the user has been using the hair drying system to obtain the desired hair condition for a predetermined period of time. In some embodiments, the one or more haircare tools may include at least one device for styling hair. For example, the one or more haircare tools may include straighteners (e.g., the Dyson® Corrale ® straighteners), and / or curling irons, and / or other devices such as the Dyson ® AirWrap ® device or the Dyson ® AirStrait ® device. In some embodiments, the computer-implemented method may further comprise providing, by the user interface, instructions to the user on how to use the one or more haircare tools to obtain the desired hair condition. In some examples, the instructions may be in the form of text presented to the user on how to operate one or more of the one or more haircare tools to obtain the desired hair condition. Additionally or alternatively, in some examples, the instructions may be presented in the form of a sequence of images (either still images, video images, or a combination of both still and video images) demonstrating to the user how to operate one or more of the one or more haircare tools to obtain the desired hair condition. In this way, the user may be able to learn how to operate the one or more haircare tools to obtain the desired hair condition and thereby obtain said condition more reliably and efficiently in future. In some embodiments, the computer-implemented method may further comprise providing, by the user interface, a list of candidate haircare tools for which user instructions are available; and receiving, by the user interface, a selection input indicative of one or more selected haircare tools from amongst the plurality of candidate haircare tools for which instructions are requested by the user. The provided instructions on how to use the one or more haircare tools to obtain the desired hair condition may be instructions on how to use the one or more selected haircare tools to obtain the desired hair condition. In this way, the user may opt to receive instructions only forthose one or more selected tools for which they perceive the need to receive instruction. In this way, the presentation of instructions can be streamlined to avoid presenting redundant or non-useful information to the user while they are operating the hair drying system. In some embodiments, the computer-implemented method may further comprise updating the instructions in response to the adjusting of the one or more parameters. In this way, the generated and presented instructions may be adaptive in the sense that they may be adjusted in real-time in response to changes in the one or more operating parameters of the one or more haircare tools. In some embodiments, the computer-implemented method may further comprise evaluating a performance of the of the user and updating the instructions in response to the evaluated performance of the user. In some examples, one or more of the haircare tools may comprise a motion sensor mounted thereon or therein. Each motion sensor may be configured to measure motion of the corresponding haircare tool that is indicative of how the user is operating the haircare tool. In some examples, the user device may comprise a recording device (e.g., a camera or video camera) for monitoring the user’s operation of the one or more haircare tools. The user device may comprise a processor configured to analyse the user’s operation of the one or more haircare tools to determine if the user is correctly following the instructions. In some examples, updating the instructions may facilitate the delivery of corrective instructions that indicate to the user how to modify their operation of the one or more haircare tools to correctly follow the originally provided instructions. In some examples, the method may comprise updating the instructions in response to a determination that the user has been operating the one or more haircare tools for a predetermined time period. For example, the overall operation of the hair drying system may be delineated into a plurality of phases. In some examples, there may be two phases: a drying phase and a styling phase, as discussed above. In such examples, the method may comprise updating the instructions to the user in response to a determination that one phase (e.g., the drying phase) has completed and a subsequent phase (e.g., the styling phase) has begun. In some examples, transition between consecutive phases may be based on one or more of: a predetermined time period elapsing, wherein the predetermined time period is a duration of the current phase; input by the user, via the user interface, to indicate that the user wants to proceed to the next phase, and / or a determination, by analysing received data, that the condition of the hair satisfies one or more criteria for proceeding to the next phase. In some examples, if the instructions are being correctly followed, the method may further comprise providing, by the user interface, positive feedback to reinforce the correct operation of the one or more haircare tools by the user. There is also provided a computer program comprising logic that, when executed by a computer, cause the computer to carry out the computer-implemented methods described herein. There is also provided a computer-readable medium comprising instructions that, when executed by a processor, causes the processor to carry out the computer-implemented methods described herein. The computer program product and / or computer-readable medium may be embodied in any suitable tangible or non-tangible form including, for example, a CD-ROM, software installed on a processor, application software stored in a server, or any other suitable format for storing. As the skilled person will appreciate, any of the examples, embodiments, aspects, of features described may be combined in suitable combination except where expressly prohibited or where such a combination is clearly impossible or incompatible. BRIEF DESCRIPTION OF THE DRAWINGS Figure 1 shows a haircare system for drying and / or styling hair as described herein. Figure 2 shows a heated hairbrush, as described herein. Figure 3 shows a hairdryer, as described herein. Figure 4 shows a method of drying hair, as described herein. Figure 5 shows data indicative of the improved efficiency of drying hair by implementing the methods described herein. Figure 6a shows an exemplary display of a user interface prompting a user to communicatively connect their user device to one or more haircare tools. Figure 6b shows an exemplary display of a user interface prompting a user to select a desired outcome. Figure 6c shows an exemplary display of a user interface prompting a user to select one or more haircare tools for which they wish to receive instructions on how to operate selected haircare tools to obtain the desired hair outcome. Figure 6d shows an exemplary display of a user interface providing a user with instructions on how to operate the one or more selected haircare tools. Figure 6e shows an exemplary display of a user interface providing a user with positive feedback. Figure 6f shows an exemplary display of a user interface providing a user with corrective instructions on how to better operate the one or more selected haircare tools. Figure 6g shows an exemplary display of a user interface indicating that the operation to dry and / or style the hair is complete. Figure 7 shows a method of operating a hair drying system, as described herein. DETAILED DESCRIPTION Figure 1 shows a haircare system 100 for drying and / or styling hair as described herein. The system 100 comprises a plurality of haircare tools including haircare tools configured to apply both conductive and convective heat, such as the AirWrap ® 110, straighteners 112 (such as the Dyson® Corrale ® straightener), a heated hairbrush 200, a hairdryer 300 (such as the Dyson® Supersonic ® hairdryer), a server 400, and a personal user device 500 such as a mobile phone or tablet. The system 100 may comprise any combination of the haircare tools set out above or may not include any of those haircare tools and / or one or more other haircare tools not depicted in Figure 1. The system 100 further comprises one or more moisture sensors configured to measure the moisture level of hair being dried and / or styled using the system 100. The one or more moisture sensors may be part of additional devices (not shown in Figure 1) and / or may be mounted on or in any of the haircare tools of the system 100. Each of the haircare tools of the system 100 is communicatively linked to the user device 500. The user device 500 is further communicatively linked to the server 400. The user device 500 (or another device of the system 100) comprises a processor configured to receive data from the one or more moisture sensors indicative of the measured moisture level of the hair. The processor is further configured to receive user preferences via a user interface of the user device 500, contextual user data via the user interface, or retrieved from a memory cache of the user device 500 and / or the server 400, and contextual geolocation data from the server 400. The processor of the user device 500, or a processor installed in any of the other devices of the system 100 is configured to analyse the received data and adjust one or more operating parameters of the haircare tools of the system 100 in response to the received data so as to achieve the user’s desired hair outcome. For example, the processor may be configured to generate and / or transmit instructions to the hairbrush 200 to adjust a temperature of the heating element of the hairbrush 200. Additionally or alternatively, the processor may be configured to generate and / or transmit instructions to the hairdryer 300 to adjust a temperature and / or an airflow speed of a heated airflow generated by the hairdryer 300. Figure 2 shows a heated hairbrush 200, as described herein. The hairbrush 200 comprises a plurality of tines 202, a heating element 204, a moisture sensor 206, and a control module 208. The plurality of tines 202 are arranged to separate strands of hair, when the hairbrush 200 is applied to hair so as to increase the surface area of the hair placeable into contact with the heating element 204. This increases the efficiency with which conductive heat may be applied to the hair by the heating element 204. The moisture sensor 206 is configured to measure a moisture level of the hair to which the hairbrush 200 is applied. The temperature of the heating element 204 may be adjusted by operation of the control module 208. The control module 208 may be configured to adjust the temperature of the heating element 204 in response to the moisture level measured by the moisture sensor 206 satisfying one of one or more preset criteria. Additionally or alternatively, the control module 208 may be configured to communicate with a processor on another device (e g., the user device 500) to transmit data indicative of the moisture level measured by the moisture sensor 206 and receive instructions which, when executed cause the temperature of the heating element 204 to be adjusted so as to achieve the user’s desired hair outcome. Figure 3 shows a hairdryer 300, as described herein. The hairdryer 300 comprises an airflow generator 302, a moisture sensor 304, and a control module 306. The airflow generator 302 is configured to generate a heated airflow to be applied to the hair to apply convective heat to the hair for drying and / or styling the hair. The moisture sensor 304 is configured to measure a moisture level of the hair to which the hairdryer 300 is applied. The temperature and / or airflow speed of the generated heated airflow may be adjusted by operation of the control module 306. The control module 306 may be configured to adjust the temperature and / or airflow speed of the generated heated airflow in response to the moisture level measured by the moisture sensor 304 satisfying one of one or more preset criteria. Additionally or alternatively, the control module 306 may be configured to communicate with a processor on another device (e.g., the user device 500) to transmit data indicative of the moisture level measured by the moisture sensor 304 and receive instructions that, when executed cause the temperature and / or airflow speed of the generated heated airflow to be adjusted so as to achieve the user’s desired hair outcome. Figure 4 shows a method of drying hair, as described herein. The method comprises, in an operation 602, applying heat by a conductive heat source to the hair. For example, operation 602 may comprise applying the heated hairbrush 200 to the hair with the heating element 204 activated and heated to a heating temperature. Simultaneous with operation 602, the method comprises, by operation 604, applying heat by a convective heat source to the hair. For example, operation 604 may comprise applying the hairdryer 300 to apply a generated heated airflow to the hair by the airflow generator 302. The method further comprises, by operation 606, collecting data associated with the drying and / or styling of the hair. The collected data may comprise moisture data indicative of the moisture level of the hair (for example as collected by moisture sensors 206, 304 of the hairbrush 200 and hairdryer 300). The collected data may additionally or alternatively comprise user preferences input to the user device 500 that are indicative of the user’s desired hair outcome. The collected data may additionally or alternatively comprise contextual user data indicative of one or more properties (e.g., demographic properties) of the user, and / or contextual geolocation data indicative of one or more properties (e.g., humidity and / or weather forecasts) of a geolocation that the user is in. The method further comprises, by operation 608 analysing the collected data to determine whether one or more parameters of the haircare tools of the system 100 need to be adjusted to achieve the user’s desired hair outcome. For example, the collected data may be analysed to determine operational constraints on one or more of the operating parameters of the one or more haircare tools (e.g., the temperature of the heating element 204, and / or the temperature and / or airflow speed of the generated heated airflow), and / or to determine one or more criteria (e.g., thresholds) that delineate between a plurality of phases of the drying and / or styling process, and / or to determine whether any one or more of those criteria have been satisfied, as discussed above. For example, operation 608 may involve determining that the water content of the hair has fallen below a predetermined threshold (e.g., a water content threshold of 20%). The method further comprises, by operation 610, generating instructions for adjusting one or more parameters of the one or more heat sources of the system 100. The instructions for adjusting the one or more parameters (e.g., the temperature of the heating element 204 and / or the temperature and / or airflow speed of the generated heated airflow) in response to a determination, based on analysis of the collected data, that the moisture level of the hair as satisfied one or more of the criteria described above. The instructed adjustment of the one or more parameters may be instructed so as to ensure that the operation of the system 100 achieves the user’s desired hair outcome. For example, operation 610 may involve, in response to determining that the water content of the hair has fallen below a predetermined threshold, generating instructions that when executed cause the temperature of the heating element 204 to be reduced from a first temperature to a second, lower temperature. Additionally or alternatively, operation 610 may involve, in response to determining that the water content of the hair has fallen below a predetermined threshold, generating instructions that when executed cause the temperature of the heated airflow generated by the airflow generator 302 to be reduced from a first temperature to a second, lower temperature, or to increase the airflow speed of said airflow from a first volumetric flow rate to a second, higher volumetric flow rate. The method further comprises, by operation 612, adjusting one or more parameters of the conductive heat source(s) in response to the generated instructions. Operation 612 may, for example, comprise adjusting a temperature of the heating element 204 in response to executing at least a part of the generated instructions. The method further comprises, by operation 614, adjusting one or more parameters of the convective heat source(s) in response to the generated instructions. Operations 612 and 614 may be independent of one another. Operation 614 may, for example, comprise adjusting a temperature and / or airflow speed of the heated airflow generated by the airflow generator 302 in response to executing at least a part of the generated instructions. Operations 606 to 614, or any combination thereof, may be repeated iteratively until the completion of the overall method of drying and / or styling of the hair. In other words, the one or more parameters of the conductive and / or convective heat sources may be dynamically adjusted in response to variations, changes and / or updates in the collected and analysed data. Figure 5 shows data indicative of the improved efficiency of drying hair by implementing the methods described herein. As can be seen from Figure 5, simultaneously applying a heated hairbrush 200 and a hairdryer 300 to the hair (i.e., simultaneously applying heat by a conductive heat source and a convective heat source) significantly increases the speed and efficiency with which the water content of the hair may be reduced. In other words, the simultaneous application of conductive and heat sources facilitates: (i) a more desirable hair outcome, (ii) a quicker achievement of the desired hair outcome, and (iii) a more efficient achievement of the desired hair outcome. Figure 6a shows an exemplary display of a user interface 502 prompting a user to communicatively connect their user device to one or more haircare tools. The contents of the display of the user interface 502 may be determined by execution of software (e.g., in the form of an application installed on the user device 500). Upon initialisation, the user interface 502 may display to the user a prompt 504 to determine a set of haircare tools that are available for communicative connection with the user device 500. In response to detecting that one or more devices are available for communicative connection (e.g., via near-field communication, radio frequency communication, or any form of suitable communication channel such as Bluetooth ® or similar), the user interface 502 presents the user with a list 506 of the devices available for communicative connection. The user may then, by interface with the interface 520 select which of the detected haircare tools to establish a connection with. Figure 6b shows an exemplary display of a user interface 502 prompting a user to select a desired hair outcome. Before or after establishing communication with one or more haircare tools (as shown in Figure 6a), the user interface 502 displays, by the display of the user device 500, a set of adjustable user preferences 508 that the user may be able to adjust at will to input their desired hair outcome from using the one or more selected haircare tools with which the user device 500 is (or is to be) connected. The adjustable preferences may include any form of adjustable mechanism such as sliders, dials, input values in the form of text strings, or any other suitable input mechanism. The user may be able, via the adjustable user preferences 508 to adjust desired hair outcome parameters in terms of any one or more of the appearance, movement, and / or feel of the desired hair outcome. Preferences related to the appearance of the desired hair outcome may include any one or more of shininess, smoothness, straightness and / or volume. Preferences related to the movement of the desired hair outcome may include staticity and / or suppleness of the desired hair outcome. Preferences related to the feel of the desired hair outcome may include any one or more of softness, the feeling of the hair feeling conditioned, smoothness, density, and / or the feeling of the presence / absence of dry ends. In some situations, there may be more adjustable parameters than are able to fit in the display of the user device 500 at one time, so the user interface may include scrolling or page-turning functionality 510 as appropriate. Figure 6c shows an exemplary display of a user interface 502 prompting a user to select one or more haircare tools 512 for which they wish to receive instructions on how to operate selected haircare tools to obtain the desired hair outcome. In response to the selection of haircare tools to which the user device 500 is (or is to be) connected, the user interface 502 is configured to present the user with a set of haircare tools 512 (preferably only those connected to the user device) for which instructions on their operation are available. The scrolling or page-turning functionality 510 may be included if there are more options to display than can be legibly displayed on the display of the user device 500 at one time. The user may be able to interact, e.g., via a touch screen of the user device 500, to select one or more haircare tools from the list of candidate haircare tools 512 for which they require instruction on their operation to achieve the desired hair outcome. Figure 6d shows an exemplary display of a user interface 502 providing a user with instructions 514 on how to operate the one or more selected haircare tools. The user interface 502 may display, via a display of the user device 500, instructions 514 in any suitable format - eg., text, still images, video images, or a combination of any suitable formats to convey instructions to the user on how to operate the selected haircare tool(s) to achieve the desired hair outcome. Figure 6e shows an exemplary display of a user interface 502 providing a user with positive feedback. The user interface 502 may provide positive feedback in a plurality of forms 516, 518. The positive feedback may be audio feedback, haptic feedback, visual feedback, or a combination of any of the suitable forms of feedback, as appropriate. The positive feedback may be intended to reinforce the positive behaviours of the user by conveying that they have correctly followed the presented instructions 514 needed to obtain their desired hair outcome. Figure 6f shows an exemplary display of a user interface 502 providing a user with corrective instructions 520 on how to better operate the one or more selected haircare tools. The user interface 502 may display, via a display of the user device 500, corrective instructions 520 in any suitable format - e.g., text, still images, video images, or a combination of any suitable formats to convey corrective instructions to the user on how to better operate the selected haircare tool(s) to achieve the desired hair outcome. Figure 6g shows an exemplary display of a user interface 502 indicating that the operation to dry and / or style the hair is complete. The user interface 502 may display, via a display of the user device 500, confirmation 522 that the process of drying and / or styling the hair using the system 100 has been completed. The user interface 502 may also display, via the display, a prompt 524 to the user to start a new hair drying / styling process if desired. Figure 7 shows a method of operating a hair drying system, as described herein. The method comprises, in an operation 702, receiving user input indicative of a desire hair condition - i.e., a desired hair outcome of using the system 100 to dry and / or style the hair. The user input may be received via the user interface 502 as shown in Figure 6b. The method further comprises, in an operation 704, receiving data indicative of a measured moisture level of the hair. Operation 704 may, for example, involve receiving data collected by the moisture sensors 206, 304 of the hairbrush 200 and hairdryer 300 and / or any other haircare tools or other devices of the system 100. The method further comprises, in an operation 706, adjusting one or more parameters of one or more of the haircare tools (e.g., adjusting a temperature of the heating element 204, and / or a temperature and / or airflow speed of the heated airflow generated by the airflow generator 302) in response to determining, by analysis of the received moisture data, that the moisture of the hair (e.g., in terms of a water content of the hair) has satisfied one of one or more preset criteria (e.g., that the water content of the hair has fallen below 20%). The method further comprises, in an operation 708 independent of operations 704 and 706, providing the user with a set, plurality or list of candidate haircare tools for which instructions are available. The set, plurality or list of candidate haircare tools may be provided by the user interface 502 as depicted in Figure 6c. The method further comprises, in operation 710, receiving a selection of haircare tools from the user for which instructions on operation are requested. The selection may be received via user interaction with the user interface 502 when configured as shown in Figure 6c. The user may select one or more haircare tools for which instructions on their operation to achieve the user’s desired hair outcome are required. The method further comprises, in operation 712 providing the user with instructions on how to use / operate the one or more selected haircare tools to achieve the user’s desired hair outcome. The instructions 514 may be provided by the user interface by displaying text, still image and / or video instructions on a display of the user device as shown in Figure 6d. The method further comprises, in operation 714, updating the instructions presented to the user, in response to the adjustment of the one or more parameters of the one or more haircare tools in operation 706. For example, if - in response to a determination that the moisture (e.g., in terms of water content) of the hair has reached the necessary level to transition from a drying phase to a styling phase, the one or more parameters may be adjusted (in operation 706) to be more suitable for styling hair than drying hair. The user interface 502 may therefore update the instructions 514 provided to the user to instruct them to transition from carrying out operational techniques for drying their hair to carrying out operational techniques for styling their hair. The method further comprises, in operation 716 independent of operation 714, evaluating the performance of the user. In other words, the method further comprises evaluating the degree to which the user is complying with (or obeying / adhering to) the instructions 514 provided in operation 712. As discussed above, the evaluation may be carried out by analysing motion data collected by one or more motion sensors mounted on or in one or more the haircare tools of the system 100, and / or by analysing video data captured by a video camera, e.g., a camera of the user device 500. The method further comprises, in operation 718, updating the instructions provided to the user in response to the results of the evaluation analysis of operation 716. In other words, operation 718 comprises providing, by the user interface 502 corrective instructions 520 to the user to instruct them on how to better operate the one or more selected haircare tools to achieve the desired hair outcome. The features disclosed in the foregoing description, on in the following claims, on in the accompanying drawings, whether expressed in specific forms, in general terms, or in terms of a means for performing a disclosed function, or a method or process for obtaining desired or disclosed results, as appropriate, may separately or in any combination of such features, be implemented to realise the claimed invention in any one of a number of diverse forms. While the invention has been described in conjunction with the examples set out above, it will be apparent to the person of ordinary skill in the art that many equivalent modifications and variations of the disclosure above are possible without departing from the spirit and scope of the invention. Throughout this specification, including the claims which follow, unless the context unambiguously requires otherwise, the words “comprise” and “include”, and variations thereof are to be understood to imply the inclusion of a stated integer or group of integers but not the exclusion of any other integer or group of integers. Throughout this specification, including the claims which follow, the singular forms “a”, “an” and “the” also encompass plural referents unless the context clearly and unambiguously dictates otherwise. Where ranges and / or parameter values are expressed, these values and ranges are to be understood as being illustrative examples, and not limiting. Further, the reference to the values of any ranges or parameters is to be understood to encompass variations on those values within a reasonable margin of error of, for example ±10%.

Claims

1. A method of drying hair, the method comprising:applying heat by a conductive heat source to the hair;simultaneously with the applying heat by the conductive heat source, applying heat by a convective heat source to the hair;monitoring one or more properties associated with the drying of the hair; and adjusting one or more parameters of the conductive heat source and / or the convective heat source based on the monitoring.

2. The method according to claim 1, wherein the method comprises applying heat by the conductive heat source and convective heat source for 60 seconds or less.

3. The method according to claim 1 or 2, wherein the conductive heat source comprises a plurality of separating members for separating strands of the hair to be dried, and wherein the method further comprises:applying the separating members of the conductive heat source to the hair to separate strands of the hair, thereby increasing a heating surface area of the hair that is directly heatable by the conductive heat source.

4. The method according to any preceding claim, wherein applying heat by the convective heat source comprises:generating a heated airflow and applying the heated airflow to the hair to heat the hair by convection and to carry, by the airflow, water away from the hair.

5. The method according to claim 4, wherein the generated heated airflow has a temperature of 150°C or lower.

6. The method according to claim 4 or 5, wherein the generated heated airflow has a volumetric flow rate of 15 litres per second or lower.

7. The method according to any preceding claim, wherein applying heat by theconductive heat source comprises heating a heating element of the conductive heat source to a temperature of 150°C or lower.

8. The method according to any preceding claim, wherein the adjusting of the one or more parameters is automatically performed in response to the monitoring.

9. The method according to any preceding claim, wherein adjusting one or more parameters of the conductive heat source and / or the convective heat source comprises adjusting one or more ofa temperature of a heating element of the conductive heat source;an airflow speed of an airflow generated by the convective heat source, and / ora temperature of an airflow generated by the convective heat source.

10. The method according to any preceding claim, wherein adjusting one or more parameters of the conductive heat source and / or the convective heat source is based on a measured moisture level of the hair.

11. The method according to any preceding claim, wherein adjusting the one or more parameters of the conductive heat source and / or the convective heat source is based on one or more of:one or more user preferences input by a user of the conductive heat source and the convective heat source;contextual user data indicative of one or more contextual properties associated with the user; and / orcontextual geolocation data indicative of one or more contextual properties associated with a geolocation of the user.

12. The method according to any preceding claim, the method further comprising: collecting, by a processor, data indicative of one or more of:a measured moisture level of the hair;one or more user preferences input by a user of the conductive heat source and the convective heat source,one or more contextual properties associated with the user, and / orone or more contextual properties associated with a geolocation of the user, analysing the collected data; andgenerating a set of instructions to adjust the one or more parameters of the conductive heat source and / or the convective heat source.

13. The method according to any preceding claim, wherein the conductive heat source includes a hairbrush, the hairbrush comprising a heating element for applying heat to the hair by conduction.

14. The method according to any preceding claim, wherein the convective heat source includes a hairdryer, the hairdryer being configured to generate a heated airflow for applying heat to the hair by convection.

15. The method according to any preceding claim, wherein the conductive heat source and / or the convective heat source further comprises a device for styling hair, the device including a heat source for applying heat to the hair by conduction and / or convection.

16. A system for drying hair, the system comprising:a conductive heat source configured to apply heat to the hair by conduction; and a convective heat source configured to apply heat to the hair by convection, wherein the system is configured to carry out the method of any preceding claim.

17. The system according to claim 16, the system further comprising:one or more moisture sensors configured to measure a moisture level of the hair, wherein at least one of the one or more moisture sensors is mounted on the conductive heat source or the convective heat source.

18. The system according to claim 16 or 17, the system further comprising:a processor configured to generate instructions for controlling an operation of the conductive heat source and / or the convective heat source.

19. The system according to claim 18, wherein the processor is installed in a personal 5 device associated with a user of the system, and wherein the instructions are generatedbased on one or more inputs, by the user, to a user interface of the personal device.

20. The system according to claim 19, wherein the processor is configured to implement an application on the personal device to receive input from the user and / or provide the 10 user with instructions for using the conductive heat source and / or the convective heat source.

Images