Electric towel rail

Abstract

The electric heating towel rack belongs to the field of household appliances, can dry multiple towels at the same time, and can adjust power consumption according to the drying condition of the towels to reduce energy consumption. The electric heating towel rack comprises a support, multiple support beams arranged on the support, and multiple towel rack assemblies arranged on the support beams. The towel rack assembly comprises a rack body, a first heater and a second heater arranged on the rack body, the first heater comprises a heating rod, a discharge module is arranged on the support beam, a first wire and a second wire are arranged on the heating rod, the towel rack assembly comprises a heating unit, the heating unit generates heat when the first wire and the second wire are conducted, a first humidity sensor is arranged on the support, a gravity sensor is arranged on the support beam, and a second humidity sensor is arranged on the second heater. The power required for drying the towels within a set time is calculated according to the signal values of the first humidity sensor, the gravity sensor and the second humidity sensor, and the power of the heating unit is adjusted.

Description

[0001] The parent application of the present application is the divisional application of the invention patent application with the application number 202210554027X, filed on May 20, 2022. TECHNICAL FIELD

[0002] The present application relates to the field of drying equipment, in particular to an electric heating towel rack. BACKGROUND

[0003] In some cases, a large amount of fabric is needed, for example in a hair salon, a large amount of towels of the same size are needed. The towels need to be washed, dried and disinfected after use, and then they can be reused. The demand for dry towels in hair salons is high, and the drying speed of wet towels is difficult to meet the demand for dry towels in hair salons. Therefore, a drying device suitable for such occasions is needed. Large towel drying devices do not consider the water content of individual towels, and usually over-dry with maximum power, which not only has high power consumption and increases the use cost, but also reduces the service life of the towels if such drying method is used for a long time. SUMMARY

[0004] The technical problem to be solved by the present application is to overcome the shortcomings of the prior art and provide an electric heating towel rack, which can dry multiple towels of the same size at the same time, and the power consumption can be adjusted according to the drying condition of individual towels to avoid damage caused by continuous heating of the towels in the dry state, thereby reducing energy consumption and improving the service life of the towels under the premise of meeting the drying effect.

[0005] To solve the above technical problems, the present application adopts the following technical solutions:

[0006] The electric towel rack comprises a support, a plurality of support beams arranged on the support and in the height direction, and a plurality of towel rack assemblies arranged on the support beams. The towel rack assembly comprises a rack body, and a first heater and a second heater are arranged on the rack body. The second heater is arranged below the first heater. The first heater comprises a heating rod for hanging a towel. A discharge module capable of releasing a weak current is arranged on the support beam. A first wire connected to the positive electrode of the discharge module and a second wire connected to the negative electrode of the discharge module are arranged on the heating rod in the length direction of the heating rod. The first wire and the second wire are arranged in a spaced manner and are spirally wound on the heating rod. The first heater and the second heater comprise a heating unit. The heating unit generates heat when the first wire and the second wire are conductive. A first humidity sensor for detecting the ambient humidity is arranged on the support. A gravity sensor for detecting the weight change of the towel rack assembly is arranged on the support beam. A second humidity sensor for detecting the humidity in the area between the first heater and the second heater is arranged on the second heater. The temperature required for the towel to dry in a set time is calculated according to the signal values of the first humidity sensor, the gravity sensor and the second humidity sensor, and the power of the heating unit is adjusted according to the temperature.

[0007] On the basis of the above scheme, the temperature required for the towel to dry in a set time is calculated and the power of the heating unit is adjusted according to the temperature, comprising:

[0008] A curve of the relationship between the weight of the towel and the drying time during the drying process is formed.

[0009] The temperature difference of the heating unit under different heating time requirements is calculated.

[0010] The amplitude of the change in the power of the heating unit is set according to the difference.

[0011] On the basis of the above scheme, the curve of the relationship between the total weight of the towel and the drying time during the drying process is F(t), F(t)=W+(W×H-N A t);

[0012] Wherein, W×H>N A t, W is the weight of the dried towel, H is the initial moisture content of the towel, and N A is the diffusion rate of water molecules.

[0013] On the basis of the above scheme, the initial moisture content H of the towel is detected according to the signal data of the gravity sensor, H=(W1-W) / W, and the current weight W1 of the towel is obtained by detecting the weight change of the towel rack assembly by the gravity sensor.

[0014] On the basis of the above scheme, the calculation of the temperature difference of the heating unit under different heating time requirements is G, ;

[0015] Wherein, T is the time length of the towel humidity and weight relationship in the drying process, which can be manually input, T0 is the drying start time, Te is the time to reach the ambient humidity or the automatic disconnection time of the drying device, F(t) is the trend curve of the towel humidity and weight relationship, is the average curve obtained after F(t) is normalized

[0016] , m is the number of curves.

[0017] On the basis of the above scheme, the calculation of the temperature required for the towel to dry in a set time and the adjustment of the power of the heating unit also includes: calculating the kurtosis value K, comparing K with the kurtosis coefficient 3 to adjust the power of the heating unit; wherein K is greater than 3, the power of the heating unit is adjusted to reduce the temperature by G, K is less than 3, the power of the heating unit is adjusted to increase the temperature by G.

[0018] On the basis of the above scheme, the calculation of the kurtosis value K uses the following formula: ;

[0019] Wherein, xi is the power of the heating unit at the i-th moment, , n=2;

[0020] , is the ambient humidity, ;

[0021] Wherein B is the moisture content of the towel, Bmax=H, Bmin is the target moisture content of the towel set by the user.

[0022] On the basis of the above scheme, a chip module is arranged in the support, and the chip module is in communication connection with the second humidity sensor of each towel rack assembly and the gravity sensor arranged below the towel rack assembly, so as to control each towel rack assembly individually.

[0023] On the basis of the above scheme, a discharging module is arranged on the support beam, and each towel rack assembly on the support beam is connected in parallel with the discharging module.

[0024] On the basis of the above scheme, a plurality of bases are arranged on the support beam, the towel rack assemblies are arranged on the bases and are in electrical connection with the bases, and the gravity sensors are arranged on the bases.

[0025] The beneficial effects of the present application are:

[0026] The electric heating towel rack has the function of heating the towel, and the first heater and the second heater are provided with heating units, and the first heater and the second heater can generate heat together to heat the towel. The first heater is used to hang the towel, and the remaining part of the towel naturally falls and adheres to the second heater under the action of gravity, and is dried by the second heater, so that the whole towel can be heated and dried, and the part of the towel between the first heater and the second heater will also be slowly dried under the action of heat radiation of the first heater and the second heater.

[0027] The first heater and the second heater can generate heat when the heating unit works, and the first heater is provided with a first wire and a second wire, and the discharge module can release a weak current. When the towel is in a wet state, the first wire and the second wire can be conducted, although there is a current on the towel, the weak current will not have any adverse effects on the human body and the human body cannot sense the existence of the current, so it will not affect the use of the user. When the first wire and the second wire are conducted, it means that there is moisture in the towel, and the heating unit is turned on to heat the towel. When the first wire and the second wire cannot be conducted, it means that the towel has been dried, and the heating unit is turned off to avoid waste of energy. In this way, the towel rack can always be in an open state, and only needs to be placed in the wet towel, and the heating function can be automatically started, and once the towel is dry, the heating function will be automatically turned off, which is convenient to use and more energy-saving.

[0028] In order to improve the reliability, the first wire and the second wire are spirally arranged on the heating rod, so that there are multiple contact points between the towel and the two wires in the length direction and the circumferential direction of the heating rod. Only when the towel at multiple contact points is dry, the heating unit will be closed, which ensures the drying degree of the towel and avoids the situation that the heating unit is closed in advance due to partial drying of the towel.

[0029] The electric heating towel rack includes a plurality of towel rack assemblies, each of which can be used to heat the towel, so that a plurality of towels can be dried at the same time, and each towel rack assembly is in an independent working state, and opening and closing are affected by the humidity of the towel. Therefore, when a plurality of towels are dried at the same time, the corresponding towel rack assembly will be closed and stopped heating after one of the towels is dried, so as to reduce power consumption.

[0030] The first humidity sensor, the gravity sensor and the second humidity sensor arranged on the towel rack can detect various data conditions, calculate the drying time of the towel under a certain power and the heating power required for the towel to complete drying within a preset time according to the influence of the external environment humidity on the drying speed of the towel, the water content of the towel itself and the heating power of the heating unit, so as to meet the use of the user, reasonably distribute and adjust the heating power and save energy consumption. And in the environment in which it is used, the towel models are uniform, the materials of each towel are the same, the sizes and weights are nearly consistent, so the water content of each towel can be calculated by the gravity sensor, and the drying speed and the expected drying time of each towel can also be calculated according to the formula, so that the power consumption of each towel rack component can be adjusted flexibly. Thus, under the premise of meeting the drying effect, the power consumption can be adjusted according to the drying condition of the single towel and the expected drying time, the energy consumption is reduced, and the service life of the heating unit is prolonged. The towel can also be reasonably heated, the quality of the towel is prevented from being damaged due to over-drying, and the service life of the towel is prolonged.

[0031] The features and advantages of the present application will be described in detail in the following specific embodiments, drawings. BRIEF DESCRIPTION OF DRAWINGS

[0032] The present application will be further described below in conjunction with the drawings:

[0033] Figure 1 It is a structural schematic view of the electric heating towel rack in the embodiment of the present application.

[0034] Figure 2 It is a structural schematic view of the towel rack component in the embodiment of the present application.

[0035] Figure 3 It is an enlarged view of A in FIG. Figure 2

[0036] Figure 4 It is an enlarged view of B in FIG. Figure 2

[0037] Figure 5 It is a side view of the towel rack component in the embodiment of the present application.

[0038] REFERENCE NUMERALS:

[0039] Support 100, support beam 110, base 120, operation panel 130.

[0040] Towel rack component 200, rack body 210, heating rod 220, second heater 230.

[0041] First wire 300, second wire 310.

[0042] ​​The first humidity sensor 400, the gravity sensor 410, and the second humidity sensor 420. DETAILED DESCRIPTION

[0043] The technical solutions of the embodiments of the present application will be explained and described below in conjunction with the drawings of the embodiments of the present application. However, the following embodiments are only preferred embodiments of the present application, and are not all. Based on the embodiments in the embodiments, other embodiments obtained by those skilled in the art without creative labor are within the protection scope of the present application.

[0044] The words such as "exemplary", "some embodiments", and the like appearing in the following mean "as an example, embodiment or illustrative", and any embodiment described as "exemplary" is not necessarily interpreted as superior or better than other embodiments. In order to better illustrate the present application, numerous specific details are given in the following specific embodiments, and those skilled in the art should understand that the present disclosure can also be implemented without some specific details.

[0045] In the description of the present application, it should be understood that the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "clockwise", "counterclockwise" and the like indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, and are only for the purpose of facilitating the description of the present application and simplifying the description, and therefore cannot be understood as indicating or implying that the devices or elements referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as limiting the present application.

[0046] In addition, the terms "first", "second" are only for the purpose of description, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of the technical features referred to. Therefore, the features defined with "first", "second" can explicitly or implicitly include one or more of the features. In the description of the present application, unless otherwise specified, the meaning of "a plurality of" is two or more, unless otherwise explicitly limited.

[0047] Reference Figures 1 to 5The application discloses an electric heating towel rack, which comprises a support 100, a plurality of support beams 110 arranged on the support 100 and in a height direction, and a plurality of towel rack assemblies 200 arranged on the support beams 110, wherein the towel rack assembly 200 comprises a rack body 210, a first heater and a second heater 230 arranged on the rack body 210, the second heater 230 is arranged below the first heater, the first heater comprises a heating rod 220 for hanging a towel, the support beam 110 is provided with a discharge module capable of releasing a weak current, the heating rod 220 is provided with a first wire 300 connected to a positive electrode of the discharge module and a second wire 310 connected to a negative electrode of the discharge module along a length direction of the heating rod 220, the first wire 300 and the second wire 310 are arranged in a spaced mode and are spirally wound on the heating rod 220, the first heater and the second heater 230 comprise a heating unit, the heating unit of the first heater is arranged in the heating rod 220, and the heating unit of the second heater 230 is arranged in the second heater 230, the heating unit generates heat when the first wire 300 and the second wire 310 are conducted, the support 100 is provided with a first humidity sensor 400 for detecting an environmental humidity, the support beam 110 is provided with a gravity sensor 410 for detecting a weight change of the towel rack assembly 200, the second heater 230 is provided with a second humidity sensor 420 for detecting a humidity in a region between the first heater and the second heater 230, and the temperature required for drying the towel in a set time is calculated according to signal values of the first humidity sensor 400, the gravity sensor 410 and the second humidity sensor 420, and the power of the heating unit is adjusted according to the temperature.

[0048] The water content of the towel can be detected by the gravity sensor 410, the weight of the towel is a fixed value when the towel is dried, the gravity sensor 410 can detect the increased weight of the towel rack assembly 200, and the water content of the current towel can be obtained by simply processing the value of the increased weight and the fixed value.

[0049] The second humidity sensor 420 is arranged around the position surrounded by the towel, water evaporates to the space around the towel during the drying process of the towel and is then released into the current environment, the second humidity sensor 420 is arranged at the position, so that the accuracy of the detection data of the second humidity sensor 420 can be ensured, when the data detected by the second humidity sensor 420 is close to the data of the first humidity sensor 400, it can be considered that the water content of the towel has reached a rated value, even if the drying continues, the water content of the towel is consistent with the humidity of the external environment with the closing of the heating unit.

[0050] The support 100 is provided with a chip module, the chip module is in communication connection with the second humidity sensor 420 of each towel rack assembly 200 and the gravity sensor 410 arranged below the towel rack assembly 200, so that each towel rack assembly 200 can be controlled individually.

[0051] The support beam 110 is provided with a discharging module, and each towel rack assembly 200 on the support beam 110 is connected in parallel with the discharging module.

[0052] The support beam 110 is provided with a plurality of bases 120, the towel rack assembly 200 is arranged on the base 120 and is electrically connected with the base 120, and the gravity sensor 410 is arranged on the base 120.

[0053] The electric heating towel rack has the function of heating a towel, and the first heater and the second heater 230 are both provided with a heating unit, so that the first heater and the second heater 230 can generate heat together to heat the towel when the towel is heated. The first heater is used to hang the towel, and the remaining part of the towel naturally falls and adheres to the second heater under the action of gravity, and is dried by the second heater 230, so that the entire towel can be heated and dried. The part of the towel between the first heater and the second heater 230 will also be slowly dried under the action of heat radiation of the first heater and the second heater 230.

[0054] When the heating unit works, the first heater and the second heater 230 can generate heat, and the first lead 300 and the second lead 310 are arranged on the first heater. The discharging module can release a weak current, and when the towel is in a wet state, the first lead 300 and the second lead 310 can be conducted. Although there is a current on the towel, the weak current will not have any adverse effects on the human body and the human body cannot sense the existence of the current, so it will not affect the use of the user. When the first lead 300 and the second lead 310 are conducted, it means that there is moisture in the towel, and the heating unit is turned on to heat the towel. When the first lead 300 and the second lead 310 cannot be conducted, it means that the towel has been dried, and the heating unit is turned off to avoid waste of energy. In this way, the towel rack can always be in an open state, and only needs to place the wet towel on the towel rack to automatically start the heating function. Once the towel is dry, the heating function will be automatically turned off, which is convenient to use and more energy-saving.

[0055] In order to improve the reliability, the first lead 300 and the second lead 310 are arranged in a spiral shape on the heating rod 220, so that there are a plurality of contact points between the towel and the two leads in the length direction and the circumferential direction of the heating rod 220. Only when the towel at the plurality of contact points is dry, the heating unit will be turned off, which ensures the drying degree of the towel and avoids the situation that the heating unit is turned off in advance due to partial drying of the towel.

[0056] The electric heating towel rack comprises a plurality of towel rack assemblies 200, each of which can be used to heat a towel, so that a plurality of towels can be dried at the same time, and each of the towel rack assemblies 200 is in an independent working state, and is turned on or turned off according to the humidity of the towel, so that when a plurality of towels are dried at the same time, the corresponding towel rack assembly 200 is turned off and stops heating after one of the towels is dried, so that the power consumption can be reduced.

[0057] The first humidity sensor 400, the gravity sensor 410 and the second humidity sensor 420 arranged on the towel rack can detect various data conditions, and calculate the drying time of the towel under a certain power and the heating power required for the towel to complete drying within a preset time according to the influence of the humidity of the external environment on the drying speed of the towel, the water content of the towel itself and the heating power of the heating unit, so as to meet the use of the user, reasonably distribute and adjust the heating power, save energy consumption and avoid reducing the service life of the heating unit in a long working state. The towel can also be reasonably heated, so as to avoid the towel from being over-dried and damaged, and the service life of the towel is improved.

[0058] The chip module is provided with one, which can be in communication connection with the first humidity sensor 400, all the second humidity sensors 420 and the gravity sensor 410, so as to control each of the towel rack assemblies 200 individually. Each of the cross beams is provided with one discharge module, and each of the discharge modules is connected with a plurality of towel rack assemblies 200 in parallel. The setting can reduce the number of discharge modules, and the adjacent cross beams do not need to be electrically connected with each other, so as to reduce the complexity of the internal circuit and reduce the complexity.

[0059] The control panel is arranged on the side of the support 100, and the weight of the towel during drying and the requirement for the drying time of the towel can be input through the control panel. The chip module automatically adjusts the drying strategy according to the requirement input by the control panel. When the demand for the towel is high, the drying time of the towel can be increased through the operation panel 130; when the demand for the dry towel is reduced, the energy-saving mode can be started, so that the towel rack operates at a low power to slowly dry the towel and reduces the energy consumption. Specifically, the temperature required for the towel to dry within a set time is calculated and used to adjust the power of the heating unit, including:

[0060] A change curve of the total weight of the towel and the drying time during the drying process is established;

[0061] The temperature difference G of the heating unit under different heating time requirements is calculated according to the curve;

[0062] The amplitude of the change of the power of the heating unit is set according to the difference.

[0063] Before adjusting the heating unit power based on the difference, the kurtosis value K needs to be calculated. K is then compared to the kurtosis coefficient 3 to adjust the heating unit power. The difference G represents the power adjustment range. When the calculated kurtosis value K is greater than 3, the heating unit power is adjusted to decrease its temperature by G; when K is less than 3, the heating unit power is adjusted to increase its temperature by G.

[0064] This adjustment method allows for control over the towel drying time, ensuring the towels reach a specified dryness level to meet user needs. The definition of a dry towel can also be set by the user via the control panel 130. For example, the user can set the towel to be considered dry when its moisture content is 10%, or adjust the moisture content to 5% or other values.

[0065] The towel rack of this invention is particularly suitable for barbershops, where towels generally conform to the "Standard for Textiles in the Hotel Industry (DB11 / T733-2010)" as follows: face towels: yarn count not less than 32S / 2, size not less than 750mm×350mm, weight not less than 180g; bath towels: yarn count not less than 32S / 2, size not less than 1400mm×800mm, weight not less than 750g. The towels are of uniform size and have nearly identical weight when dry, facilitating consistent control. The following embodiments all use a single towel rack assembly for heating towels as an example.

[0066] The specific calculations are as follows:

[0067] The curve showing the relationship between the total weight of the towel and the drying time during the drying process is F(t), where F(t) = W + (W × HN) A t);

[0068] Where W×H>N A t, W is the gravity acting on the dry towel, H is the initial moisture content of the towel, and N is the total force. A The diffusion rate of water molecules in the towel.

[0069] in: ;

[0070] D is the diffusion coefficient, with units of m. 2 / s, ρ is the thickness of the stagnant air layer in meters (m), p is the total pressure of the stagnant air layer, pBm is the logarithmic average of the partial pressures of component B in the stagnant air layer, p / pBm is the drift factor, and pA1 and pA2 are the partial pressures of the two components on either side of the stagnant air layer. In this application, the pressure at the location of the entire device remains constant, but it is related to the humidity difference detected by the two humidity sensors. Because N cannot be precisely calculated... A Therefore, this application obtains N through testing. A The value.

[0071] The initial moisture content H of the towel is detected based on the signal data of the gravity sensor 410, where H = (W1 - W) / W. The gravity sensor 410 detects the weight change of the towel rack assembly 200 to obtain the current gravity W1 of the towel.

[0072] In actual operation, depending on the different needs of users, the control methods include simple control and precise control of the heater, which will be described in detail below with specific examples:

[0073] Example 1

[0074] In a typical barbershop, a simple control method is used, which requires calculation:

[0075] The curve showing the relationship between the total weight of the towel and the drying time during the drying process is F(t), where F(t) = W + (W × HN) A t). In the simple control mode, the diffusion rate N of water molecules in the towel is not considered. A The change; fix it to a constant N n .

[0076] N n =(N Amax +N Amin ) / 2;

[0077] N Amax The initial diffusion rate of water molecules on the towel;

[0078] N Amin The rate at which water molecules diffuse through the towel to achieve the desired moisture content.

[0079] Thus, according to the formula F(t) = W + (W × HN) A t) can confirm the actual heating and drying time without intervention when the heater is turned on. For example, in this embodiment, the heating unit heats at a total power of 1200W, and the water molecule diffusion rate N of the fixed towel is calculated at this power. n Under these conditions, if the final target moisture content is set at 10%, the drying time for a towel is 23 minutes.

[0080] If we want the towels to dry within 15 minutes, the chip module automatically increases the power by 10%. It then operates at the increased power for 12 minutes. After 12 minutes, it compares the humidity difference detected by the first and second humidity sensors. If the humidity difference is within expectations, meaning the towel's moisture content reaches 10% by the 15th minute, it maintains this power and continues heating until the 15th minute. If the difference is higher than expected, meaning the towel's moisture content will reach 10% before the 15th minute, the power is adjusted back to the original power before the increase and heating continues until the 15th minute. If the difference is lower than expected, meaning the towel's moisture content still doesn't reach 10% by the 15th minute, the power is increased again, and heating continues until the 15th minute.

[0081] The method in Example 1 has low requirements for chip control and the overall equipment cost is low, but it is sufficient to meet the needs of ordinary barbershops. The disadvantage is that the temperature control is not particularly precise.

[0082] Example 2

[0083] For scenarios with more stringent power management control, the control chip needs to employ higher precision algorithms. Specifically:

[0084] The temperature difference of the heating unit under different heating time requirements is calculated to be G.

[0085] .

[0086] Where T is the time duration of the towel's moisture and weight relationship during the drying process, which can be manually input; T0 is the drying start time; Te is the time to reach the ambient humidity or for the drying device to automatically shut off; and F(t) is the trend curve of the towel's moisture and weight relationship. The average curve obtained after normalizing F(t)

[0087] m is the number of curves. When m=2,

[0088] .

[0089] The kurtosis value K is calculated using the following formula: .

[0090] Where xi is the power of the heating unit at time i. n=2;

[0091] , For ambient humidity, ;

[0092] B represents the towel's moisture content, Bmax = H, and Bmin represents the user-defined target moisture content for the towel.

[0093] The towel's mass is set to 180g when dry. Based on a gravity of 9.8N / kg, W = 1.764N. The gravity sensor detects the weight change of the towel rack assembly, obtaining the weight of the towel as W1 = 2.58N, which is converted to 263g. The initial moisture content of the towel is H, calculated as H = (W1 - W) / W, which is 46%.

[0094] In this embodiment, a moisture content of 10% is taken as the target value;

[0095] According to the formula F(t) = W + (W × HN) A t), calculate the temperature difference of the heating unit under different heating time requirements as G.

[0096] .

[0097] N A The value varies under different conditions, but since the actual drying time in this application is not very long, it can be converted into a fixed value, such as approximately 1.6 × 10⁻⁶ when the heating unit is not turned on. -3 When the heating unit is turned on, the value is approximately 7.6 × 10⁻⁶. -3 .

[0098] Based on this curve, it can be calculated that when the heating unit is turned on, the actual heating time t = 27 minutes is required to dry the product to a moisture content of 10%.

[0099] At this point, if the drying process needs to be completed within 15 minutes to achieve the target moisture content of 10%:

[0100] Calculate the kurtosis value k. ;

[0101] Where xi is the power of the heating unit at time i. n=2;

[0102] , For ambient humidity, ;

[0103] K is calculated to be approximately 2.7, which is less than 3. Therefore, the target drying rate can be achieved in a short time by increasing the power.

[0104] The power increase on a single heater was calculated to be 17W based on the change in heater temperature.

[0105] To ensure the overall drying effect of the towels, only the second heater on the towel rack assembly undergoes power conversion.

[0106] Example 3

[0107] If there is ample time, for example, to complete the drying process within 45 minutes to achieve the target moisture content of 10%:

[0108] The calculation method is the same as in Example 1. At this time, K is calculated to be approximately 3.3, which is greater than 3. Therefore, the target drying rate can be ensured to be completed within a limited time by reducing the power.

[0109] The power reduction on a single heater was calculated to be 21W based on the change in heater temperature.

[0110] To ensure the overall drying effect of the towels, only the second heater on the towel rack assembly undergoes power conversion.

[0111] Example 4

[0112] If the towel is to be dried before the barbershop closes, it can be dried the next morning. In this case, the heating unit can be turned off to allow it to air dry naturally. It should be noted that when the ambient humidity is higher than a certain threshold, natural air drying will not allow the towel to reach the target moisture content of 10%. However, since the preset time t is greater than 10 hours, the chip module can turn on the heating unit a certain time before the time point.

[0113] At this point, the initial moisture content of the towel is the lowest moisture content that can be achieved by natural air drying. Then, using the formula F(t) = W + (W × HN) A t) Calculate that as long as the heater is turned on at time t before the specified time, the expected moisture content can be achieved within the specified time.

[0114] In this embodiment, it can be calculated that turning on the heating unit 22 minutes before the specified time will allow the towel to reach the expected 10% moisture content within the specified time.

[0115] The modes described in Examples 2 to 4 require high-precision chip control, resulting in higher overall equipment costs. This equipment is typically used to meet the needs of high-end hair salons. It offers highly precise temperature control, ensuring timely delivery of towels that meet specific requirements, and, more importantly, minimizing damage to the towels during the drying process. For example, a high-grade Egyptian cotton thick towel, when dried at a constant power in a conventional dryer for an extended period, will develop visible surface scratches after approximately 200 drying cycles; it will typically break after 300 cycles. However, the towel rack using this invention, with its multi-level power adjustment based on humidity, will only exhibit visible surface scratches after more than 500 drying cycles. This significantly extends the lifespan of a single towel.

[0116] Example 5

[0117] The moisture content of each towel on the towel rack can be calculated using a gravity sensor 410. The drying speed and expected drying time of each towel can also be calculated using formulas, allowing for flexible adjustment of the power consumption of each towel rack component 200. Thus, while meeting the drying requirements, power consumption can be adjusted based on the drying status and expected drying time of each towel, reducing energy consumption.

[0118] In this application, the heating function of the towel rack assembly 200 is controlled by the switching on and off of the first wire 300 and the second wire 310. In daily use, it is difficult to avoid situations where the first wire 300 and the second wire 310 are accidentally switched on, for example, when a water droplet falls onto the heating rod 220. Water droplets are conductive, thus switching on the first wire 300 and the second wire 310. However, the weight of the water droplet on the heating rod 220 is negligible, and the gravity sensor 410 cannot detect the weight change or can only detect a slight weight change. This means that no towel is placed on the heating rod 220. Therefore, even if both the first wire 300 and the second wire 310 are switched on, the heating power of the heating unit is zero to avoid energy waste. If the user accidentally touches the heating rod 220, although this will cause both the first wire 300 and the second wire 310 to switch on, because it is an accidental touch, the user cannot maintain a constant force on the heating rod 220. Therefore, when the gravity sensor 410 detects a series of weight changes in a short period, it will also consider it invalid, and the heating unit will not start working.

[0119] Therefore, in practical use, in order to reduce the energy consumption of the heating unit, the heating unit needs to meet two conditions: first, both the first wire 300 and the second wire 310 need to be in a conductive state; second, the gravity sensor 410 needs to detect that a heavy object appears on the heating rod 220, and the weight of the heavy object does not change significantly within a unit of time (e.g., 30 seconds).

[0120] Specific working logic:

[0121] When both the first wire 300 and the second wire 310 are connected, the gravity sensor 410 detects a heavy object on the heating rod 220, and the weight does not change significantly in a unit of time, and the heating unit works.

[0122] When the towel dries, the first wire 300 and the second wire 310 disconnect, and the heating unit stops working. If a water droplet falls on the heating rod 220 at this time, the first wire 300 and the second wire 310 become conductive, but the weight on the heating rod 220 does not change significantly, and the heating unit does not work. If a wet towel is placed on the heating rod 220 at this time, the first wire 300 and the second wire 310 become conductive, the weight on the heating rod 220 changes significantly, and the weight does not change significantly within a unit of time, and the heating unit starts working.

[0123] To ensure heating of the lower part of the towel, the projection of the heating rod 220 in the vertical direction falls within the projection range of the second heater 230. This ensures that the lower part of the towel hanging on the heating rod 220 is in contact with the second heater 230, guaranteeing a fast drying speed for the lower part of the towel. Therefore, a first wire 300 and a second wire 310 can also be provided on the surface of the second heater 230. The wires on the first and second heaters 230 are used to control the operation of the first and second heaters 300, respectively. Simply put, when the first wire 300 and the second wire 310 on the first heater are not conductive, the heating function of the first heater is turned off. If the first wire 300 and the second wire 310 on the second heater 300 are conductive at this time, it means that the lower part of the towel is still damp. The heating function of the second heater 230 is only turned off when the first wire 300 and the second wire 310 on the second heater 230 are disconnected. The first wire 300 and the second wire 310 on the second heater 230 are arranged in a serpentine pattern to ensure sufficient contact with the towel.

[0124] The above description is merely a specific embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Those skilled in the art should understand that the present invention includes, but is not limited to, the contents described in the accompanying drawings and the specific embodiments above. Any modifications that do not depart from the functional and structural principles of the present invention will be included within the scope of the claims.

Claims

1. An electric towel rack, characterized in that, The device includes a support, multiple support beams mounted on the support and arranged along the height direction, and multiple towel rack assemblies mounted on the support beams. Each towel rack assembly includes a frame, on which a first heater and a second heater are provided. The second heater is located below the first heater. The first heater includes a heating rod for hanging towels. The support beams are provided with a discharge module capable of releasing a weak current. The heating rod has a first wire connected to the positive terminal of the discharge module and a second wire connected to the negative terminal of the discharge module along its length direction. The first and second wires are spaced apart and spirally wound on the heating rod. The first and second heaters include heating units that generate heat when the first and second wires are connected. The support is provided with a first humidity sensor for detecting ambient humidity. The support beams are provided with a gravity sensor for detecting changes in the weight of the towel rack assembly. The second heater is provided with a second humidity sensor for detecting the humidity in the area between the first and second heaters. The temperature required for drying the towels within a set time is calculated based on the signal values ​​from the first humidity sensor, the gravity sensor, and the second humidity sensor, and the power of the heating unit is adjusted accordingly. The calculation of the temperature required for the towel to dry within a set time and the adjustment of the heating unit power accordingly include: Establish a curve showing the relationship between the total weight of the towel and the drying time during the drying process; Calculate the temperature difference of the heating unit under different heating time requirements based on the curve; The range of power variation for the heating unit is set based on the difference. The curve showing the relationship between the total weight and drying time of the towel during the drying process is F(t), where F(t) = W + (W × HN) A t); Where W×H>N A t, W is the gravity acting on the dry towel, H is the initial moisture content of the towel, and N is the force of gravity. A This represents the diffusion rate of water molecules. The temperature difference of the heating unit under different heating time requirements is G. ; Where T is the set total drying time, T0 is the drying start time, Te is the time to reach the ambient humidity or for the drying device to automatically shut off, and F(t) is the curve showing the relationship between total weight and drying time. The average curve obtained after normalizing F(t): m is the number of curves; The calculation of the temperature required for the towel to dry within a set time and the adjustment of the heating unit power accordingly also includes: calculating the kurtosis value K, comparing K with the kurtosis coefficient 3, and adjusting the heating unit power accordingly; wherein, if K is greater than 3, the heating unit power is adjusted to reduce the temperature by G, and if K is less than 3, the heating unit power is adjusted to increase the temperature by G. The kurtosis value K is calculated using the following formula: Where xi is the power of the heating unit at time i. n=2; , For ambient humidity, ; Where B is the towel moisture content, Bmax=H, and Bmin is the user-defined target towel moisture content.

2. The electric towel rack according to claim 1, characterized in that, The initial moisture content H of the towel is detected based on the signal data from the gravity sensor, where H = (W1 - W) / W. The gravity sensor detects the weight change of the towel rack assembly to obtain the current gravity W1 experienced by the towel.

3. The electric towel rack according to claim 1 or 2, characterized in that, The support is equipped with a chip module, which is communicatively connected to the second humidity sensor of each towel rack assembly and the gravity sensor located below the towel rack assembly, so as to individually control each towel rack assembly.

4. The electric towel rack according to any one of claims 1 or 2, characterized in that, A discharge module is provided on the support beam, and each towel rack assembly on the support beam is connected in parallel with the discharge module.

5. The electric towel rack according to any one of claims 1 or 2, characterized in that, The support beam is provided with multiple bases, the towel rack assembly is arranged on the bases and electrically connected to the bases, and the gravity sensor is set on the bases.

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