A temperature control method for fumigation machine

Abstract

This invention provides a temperature control method for a fumigation machine, relating to the field of temperature control technology. The method includes the following steps: S10, controlling the water pump of the fumigation machine to supply water at a certain setting, calculating the current temperature rise curve; determining the specific heat capacity of the heating system of the fumigation machine; solving for the theoretical temperature rise curve; solving for the maintaining power of the heating system at different temperatures; S20, solving for the effective power of the heating system, which is the power required to heat 100°C water to form 100°C water vapor; calculating the maximum power vaporization water consumption rate at 100°C; S30, when the water in the heating element has evaporated completely, calculating the total amount of water vaporized during that time period; obtaining the water flow rate at that setting. The beneficial effect of this invention is that it can intelligently and accurately control the temperature of the heating element, enabling the fumigation machine to have a good constant temperature effect.

Description

Technical Field

[0001] This invention relates to the field of temperature control technology, and more specifically, to a temperature control method for fumigation machines. Background Technology

[0002] With the improvement of living standards, people are paying more and more attention to health and quality of life. Steam sauna is a popular health activity. However, due to the large size and high cost of public sauna service equipment systems, home sauna health products have developed rapidly and have gradually gained popularity among the general public, resulting in a wide variety of home steam sauna products.

[0003] To meet market demand, portable or mobile sauna devices, known as fumigation machines, have been developed in the current technology. These machines vary in size; smaller fumigation machines can fumigate specific areas, while larger ones can fumigate the entire body.

[0004] The existing fumigation machines on the market generally have insufficient temperature control of their heating elements, resulting in large temperature fluctuations and poor temperature stability during use, which can even cause burns to the skin. Summary of the Invention

[0005] To overcome the shortcomings of existing technologies, this invention provides a temperature control method for fumigation machines. This method can intelligently and accurately control the temperature of the heating element, enabling the fumigation machine to have a good constant temperature effect.

[0006] The technical solution adopted by this invention to solve its technical problem is: a temperature control method for a fumigation machine, the improvement of which is that the method includes the following steps:

[0007] S10. Control the water pump of the fumigation machine to enter water at a certain level, adjust the heating element of the fumigation machine to the maximum power for heating, and perform differential calculation based on the real-time temperature value to calculate the current temperature rise curve.

[0008] The heat capacity of the heating element of the fumigation machine can be determined by using the heating curve and heating power.

[0009] By applying the heating power and the heat capacity of the heating element, the theoretical temperature rise curve can be obtained. The maintenance power of the heating system at different temperatures can be obtained by using the difference between the theoretical temperature rise curve and the actual temperature rise curve.

[0010] S20. Based on the maintaining power of the heating system at 100℃ and the actual input power of the heating system, the effective power of the heating system is calculated. This effective power is the power to heat water at 100℃ to form water vapor at 100℃. The maximum power vaporization water consumption rate at 100℃ is calculated using the effective power and the latent heat of vaporization of water at 100℃.

[0011] S30. When the water in the heating body has evaporated, calculate the total amount of water vaporized during that time period by calculating the time taken for evaporation and the amount of water consumed by vaporization; subtract the volume of the heating body from the total amount of water vaporized to obtain the water pump volume during that time period, and divide by the time to obtain the water flow rate of that level.

[0012] Furthermore, in step S10, before step S20, the heating body is filled with water, and the amount of water consumed to turn into water vapor is greater than the amount replenished by the water pump, so the water in the heating body becomes less and less.

[0013] Furthermore, in step S10, the current temperature rise curve is calculated using the following formula:

[0014] V(t) = dT / dt;

[0015] C(t0) = P / V(t);

[0016] Where dT is the temperature rise within the measurable time t, and dt is the length of the measurable time; C(t0) is the specific heat capacity of the heating element at time t0;

[0017] The heating curve V(t) consists of segments AB, BC, and CD. Segment AB is the heating curve before the temperature of the heating element reaches the boiling point of water, segment BC is the heating curve after the temperature of the heating element reaches the boiling point of water, and segment CD is the heating curve after the water in the heating element has evaporated and the newly flowing water has completely turned into water vapor.

[0018] Furthermore, the slope of segment AB is 1.00, the slope of segment BC is 0, and the slope of segment CD is 0.94.

[0019] Furthermore, if the initial moment is defined as when the temperature of the heating element is close to the ambient temperature, then it is assumed that all the heat emitted by the heating element is converted into internal energy.

[0020] C(0) = P / V(t0);

[0021] V(t0) = dT / dt;

[0022] Where C(0) is the specific heat capacity of the heating element measured at the initial time, V(t0) is the heating rate at the initial time, and P is the electric heating power of the heating element.

[0023] Furthermore, in step S20, the formula for calculating the effective power of the heating system is as follows:

[0024] P(maintenance work - 100) = (V(t0) - V(t100)) / C(0);

[0025] P(effective work - 100) = P(total work) - P(maintenance work - 100);

[0026] Wherein, P(maintenance work - 100) is the maintenance power of the heating element at 100℃, V(t0) is the heating rate of the heating element at ambient temperature, V(t100) is the heating rate of the heating element at 100℃, C(0) is the specific heat capacity of the heating element measured at the initial moment, P(total work) is the product of the current and voltage of the heating element, and P(effective work - 100) is the work power done by the heating element at 100℃ to convert water at 100℃ into water vapor at 100℃.

[0027] Furthermore, in step S30, when the water in the heating element has evaporated completely, the calculation formulas for the evaporation time and the amount of water consumed by vaporization are as follows:

[0028] V (water consumption rate) = P (effective work - 100) / η (100);

[0029] V(total) = V(water consumption rate) xt(s20);

[0030] Wherein, V(water consumption rate) is the amount of water consumed when water at 100℃ is converted into steam at 100℃; η(100) is the heat of vaporization of a unit amount of water at 100℃ converted into steam at 100℃; V(total) is the total amount of water consumed in the water-to-steam conversion process; and t(s20) is the time taken for evaporation.

[0031] Furthermore, in step S30, the formula for calculating the water flow rate of the fumigation machine's water pump is as follows:

[0032] V(water pump) = V(total) - V(heating element);

[0033] V(W) = V(water pump) / t(s20);

[0034] Where V(heating element) is the volume of the heating element, V(water pump) is the amount of water replenished by the water pump in time t(s20), and V(W) is the pumping rate corresponding to the current gear of the water pump.

[0035] The beneficial effects of this invention are: by continuously measuring the results obtained under controlled conditions for a limited number of variables, other unknown system constants are obtained through calculation; the operating parameters of the system are adaptively corrected using these constants; and the temperature of the heating element can be intelligently and accurately controlled, so that the fumigation machine has a good constant temperature effect. Attached Figure Description

[0036] Figure 1 This is a schematic diagram of the heating curve in this invention. Detailed Implementation

[0037] The present invention will be further described below with reference to the accompanying drawings and examples.

[0038] The following will clearly and completely describe the concept, specific structure, and technical effects of the present invention in conjunction with embodiments and accompanying drawings, so as to fully understand the purpose, features, and effects of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, not all of them. Other embodiments obtained by those skilled in the art based on the embodiments of the present invention without creative effort are all within the scope of protection of the present invention. Furthermore, all connections / linkages involved in the patent do not simply refer to direct contact between components, but rather to the ability to form a better connection structure by adding or reducing connecting accessories according to specific implementation conditions. The various technical features in this invention can be combined interactively without contradicting each other.

[0039] This invention provides a temperature control method for a fumigation machine. This method uses temperature sensors to monitor key components in real time, enabling dynamic analysis of the entire device and calculating the optimal control method to achieve the desired effect. In this embodiment, the fumigation machine has an integrated heating element equipped with a temperature probe. The probe measures the temperature of the heating element in real time and also measures the temperature of the steam-input chamber, feeding this data back to the controller. The controller then uses an internal algorithm to intelligently determine the type of terminal chamber and implement flexible control.

[0040] In this embodiment, the method includes the following steps:

[0041] S10. Control the water pump of the fumigation machine to enter water at a certain level, adjust the heating element of the fumigation machine to the maximum power for heating, and perform differential calculation based on the real-time temperature value to calculate the current temperature rise curve.

[0042] Reference Figure 1 The diagram shown is a schematic of the heating curve. In step S10, the formula for calculating the current heating curve is as follows:

[0043] V(t) = dT / dt;

[0044] C(t0) = P / V(t);

[0045] Wherein, dT represents the temperature rise within the measurable time t, and dt is the length of the measurable time; C(t0) is the specific heat capacity of the heating element at time t0; the heating curve V(t) consists of segments AB, BC, and CD, where segment AB is the heating curve before the heating element temperature reaches the boiling point of water, segment BC is the heating curve after the heating element temperature reaches the boiling point of water, and segment CD is the heating curve after the water in the heating element has evaporated and the newly flowing water has completely converted into water vapor. In this embodiment, the slope of segment AB is 1.00, the slope of segment BC is 0, and the slope of segment CD is 0.94.

[0046] Furthermore, the heat capacity of the heating element of the fumigation machine is determined by the heating curve and the heating power; the theoretical heating curve is obtained by applying the heating power and the heat capacity of the heating element; and the maintenance power of the heating system at different temperatures is obtained by the difference between the theoretical heating curve and the actual heating curve.

[0047] In this embodiment, the initial moment is defined as when the temperature of the heating element is close to the ambient temperature, and it is assumed that all the heat emitted by the heating element is converted into internal energy.

[0048] C(0) = P / V(t0);

[0049] V(t0) = dT / dt;

[0050] Where C(0) is the specific heat capacity of the heating element measured at the initial time, V(t0) is the heating rate at the initial time, and P is the electric heating power of the heating element.

[0051] S20. Based on the maintaining power of the heating system at 100℃ and the actual input power of the heating system, the effective power of the heating system is calculated. This effective power is the power to heat water at 100℃ to form water vapor at 100℃. The maximum power vaporization water consumption rate at 100℃ is calculated using the effective power and the latent heat of vaporization of water at 100℃.

[0052] Before step S20, the heating element is filled with water. The amount of water consumed as it turns into steam is greater than the amount replenished by the water pump, and the water in the heating element gradually decreases.

[0053] In step S20, the formula for calculating the effective power of the heating system is as follows:

[0054] P(maintenance work - 100) = (V(t0) - V(t100)) / C(0);

[0055] P(effective work - 100) = P(total work) - P(maintenance work - 100);

[0056] Wherein, P(maintenance work - 100) is the maintenance power of the heating element at 100℃, V(t0) is the heating rate of the heating element at ambient temperature, V(t100) is the heating rate of the heating element at 100℃, C(0) is the specific heat capacity of the heating element measured at the initial moment, P(total work) is the product of the current and voltage of the heating element, and P(effective work - 100) is the work power done by the heating element at 100℃ to convert water at 100℃ into water vapor at 100℃.

[0057] S30. When the water in the heating body has evaporated, calculate the total amount of water vaporized during that time period by calculating the time taken for evaporation and the amount of water consumed by vaporization; subtract the volume of the heating body from the total amount of water vaporized to obtain the water pump volume during that time period, and divide by the time to obtain the water flow rate of that level.

[0058] In step S30, when the water in the heating element has evaporated completely, the formulas for calculating the evaporation time and water consumption during vaporization are as follows:

[0059] V (water consumption rate) = P (effective work - 100) / η (100);

[0060] V(total) = V(water consumption rate) xt(s20);

[0061] Wherein, V(water consumption rate) is the amount of water consumed when water at 100℃ is converted into steam at 100℃; η(100) is the heat of vaporization of a unit amount of water at 100℃ converted into steam at 100℃; V(total) is the total amount of water consumed in the water-to-steam conversion process; and t(s20) is the time taken for evaporation.

[0062] In step S30, the formula for calculating the water flow rate of the fumigation machine's water pump is as follows:

[0063] V(water pump) = V(total) - V(heating element);

[0064] V(W) = V(water pump) / t(s20);

[0065] Where V(heating element) is the volume of the heating element, V(water pump) is the amount of water replenished by the water pump in time t(s20), and V(W) is the pumping rate corresponding to the current gear of the water pump.

[0066] Based on this, the present invention provides a temperature control method for a fumigation machine. This method continuously measures the results obtained under control conditions for a limited number of variables and calculates other unknown system constants. These constants are used to adaptively correct the operating parameters of the system. This method can intelligently and accurately control the temperature of the heating element, so that the fumigation machine has a good constant temperature effect.

[0067] The above is a detailed description of the preferred embodiments of the present invention. However, the present invention is not limited to the embodiments described. Those skilled in the art can make various equivalent modifications or substitutions without departing from the spirit of the present invention. All such equivalent modifications or substitutions are included within the scope defined by the claims of this application.

Claims

1. A temperature control method for use in a fumigation machine, characterized in that, The method includes the following steps: S10. Control the water pump of the fumigation machine to enter water at a certain level, adjust the heating element of the fumigation machine to the maximum power for heating, and perform differential calculation based on the real-time temperature value to calculate the current temperature rise curve. The heat capacity of the heating element of the fumigation machine can be determined by using the heating curve and heating power. By applying the heating power and the heat capacity of the heating element, the theoretical temperature rise curve can be obtained. The maintenance power of the heating system at different temperatures can be obtained by using the difference between the theoretical temperature rise curve and the actual temperature rise curve. S20. Based on the maintaining power of the heating system at 100℃ and the actual input power of the heating system, the effective power of the heating system is calculated. This effective power is the power to heat water at 100℃ to form water vapor at 100℃. The maximum power vaporization water consumption rate at 100℃ is calculated using the effective power and the latent heat of vaporization of water at 100℃. S30. When the water in the heating body has evaporated, calculate the total amount of water vaporized during that time period by calculating the time taken for evaporation and the amount of water consumed by vaporization; subtract the volume of the heating body from the total amount of water vaporized to obtain the water pump volume during that time period, and divide by the time to obtain the water flow rate of that level.

2. The temperature control method for a fumigation machine according to claim 1, characterized in that, In step S10, before step S20, the heating body is filled with water. The amount of water consumed as it turns into steam is greater than the amount replenished by the water pump, and the water in the heating body gradually decreases.

3. The temperature control method for a fumigation machine according to claim 1, characterized in that, In step S10, the current temperature rise curve is calculated using the following formula: V(t) = dT / dt; C(t0) = P / V(t); Where dT is the temperature rise within the measurable time t, and dt is the length of the measurable time; C(t0) is the specific heat capacity of the heating element at time t0; The heating curve V(t) consists of segments AB, BC, and CD. Segment AB is the heating curve before the temperature of the heating element reaches the boiling point of water, segment BC is the heating curve after the temperature of the heating element reaches the boiling point of water, and segment CD is the heating curve after the water in the heating element has evaporated and the newly flowing water has completely turned into water vapor.

4. The temperature control method for a fumigation machine according to claim 3, characterized in that, The slope of segment AB is 1.00, the slope of segment BC is 0, and the slope of segment CD is 0.

94.

5. The temperature control method for a fumigation machine according to claim 3, characterized in that, If the initial moment is defined as when the temperature of the heating element is close to the ambient temperature, then it is assumed that all the heat emitted by the heating element is converted into internal energy. C(0) = P / V(t0); V(t0) = dT / dt; Where C(0) is the specific heat capacity of the heating element measured at the initial time, V(t0) is the heating rate at the initial time, and P is the electric heating power of the heating element.

6. The temperature control method for a fumigation machine according to claim 5, characterized in that, In step S20, the formula for calculating the effective power of the heating system is as follows: P(maintenance work - 100) = (V(t0) - V(t100)) / C(0); P(effective work - 100) = P(total work) - P(maintenance work - 100); Wherein, P(maintenance work - 100) is the maintenance power of the heating element at 100℃, V(t0) is the heating rate of the heating element at ambient temperature, V(t100) is the heating rate of the heating element at 100℃, C(0) is the specific heat capacity of the heating element measured at the initial moment, P(total work) is the product of the current and voltage of the heating element, and P(effective work - 100) is the work power done by the heating element at 100℃ to convert water at 100℃ into water vapor at 100℃.

7. The temperature control method for a fumigation machine according to claim 5, characterized in that, In step S30, when the water in the heating element has evaporated completely, the formulas for calculating the evaporation time and water consumption during vaporization are as follows: V (water consumption rate) = P (effective work - 100) / η (100); V(total) = V(water consumption rate) xt(s20); Wherein, V(water consumption rate) is the amount of water consumed when water at 100℃ is converted into steam at 100℃; η(100) is the heat of vaporization of a unit amount of water at 100℃ converted into steam at 100℃; V(total) is the total amount of water consumed in the water-to-steam conversion process; and t(s20) is the time taken for evaporation.

8. The temperature control method for a fumigation machine according to claim 7, characterized in that, In step S30, the formula for calculating the water flow rate of the fumigation machine's water pump is as follows: V(water pump) = V(total) - V(heating element); V(W) = V(water pump) / t(s20); Where V(heating element) is the volume of the heating element, V(water pump) is the amount of water replenished by the water pump in time t(s20), and V(W) is the pumping rate corresponding to the current gear of the water pump.

Images