A method, system, computer, and readable storage medium for frequency conversion control of a heater.

Abstract

This invention provides a variable frequency control method, system, computer, and readable storage medium for a heater. The method includes calculating a temperature difference; calculating a heating cycle and a stabilization power based on the temperature difference; determining the heating power of the heater based on the heating cycle; calculating a first airflow rate and a first oil injection rate of the fan based on the heating power; controlling the heater's heating according to the first airflow rate and the first oil injection rate; determining whether the temperature difference is within a preset range; if the temperature difference is not within the preset range, continuing to control the heater's heating according to the first airflow rate and the first oil injection rate; if the temperature difference is within the preset range, calculating a second airflow rate and a second oil injection rate of the fan; and controlling the heater's stabilization heating according to the second airflow rate and the second oil injection rate, thereby achieving variable frequency control of the heater. This invention can significantly reduce the energy consumption of the heater, while achieving heating and temperature stabilization of the heater in the fastest and most energy-efficient manner.

Description

Technical Field

[0001] This invention belongs to the technical field of heater control, specifically relating to a variable frequency control method, system, device, and readable storage medium for a heater. Background Technology

[0002] As the name suggests, a warm air blower is a device that emits warm air. Generally, the maximum temperature is about 40℃. A warm air blower is a combined unit consisting of a fan, an electric motor, and a radiator. It is suitable for various types of workshops where air recirculation is allowed. When the air does not contain dust or flammable gases, it can be used for circulating air heating.

[0003] In existing technologies, the control of a space heater is usually achieved by manually adjusting the heater's setting to raise the temperature. During operation, the space heater continuously raises the temperature at that setting or at a fixed power. To maintain a stable temperature by controlling the heater's operation at a fixed power, it typically operates at that power for a period of time until the outside temperature matches the set temperature, after which it stops operating. When the temperature drops, it resumes operation at the fixed power, repeating the above process to maintain a stable temperature. This leads to excessive energy consumption of the space heater and also fails to quickly maintain a stable temperature. Summary of the Invention

[0004] To address the aforementioned technical problems, this invention provides a variable frequency control method, system, device, and readable storage medium for a heater, which solves the technical problems existing in the prior art.

[0005] In a first aspect, the invention provides the following technical solution: a variable frequency control method for a heater, the method being applied to a heater, the heater including a fan, an injector, a motor, and a pressure pump, the motor controlling the speed of the fan, and the pressure pump controlling the amount of fuel injected by the injector, the method comprising:

[0006] Obtain the set temperature and the current ambient temperature, and calculate the temperature difference based on the set temperature and the current ambient temperature;

[0007] The heating cycle of the heater under different power levels is calculated based on the temperature difference, and the corresponding stable power level is determined based on the temperature difference.

[0008] The heating power of the heater is determined based on the heating cycle, the first air volume of the fan is calculated based on the heating power, and the first oil injection quantity of the matching oil injector is calculated based on the first air volume. The heating of the heater is controlled based on the first air volume and the first oil injection quantity.

[0009] Determine whether the temperature difference is within a preset range;

[0010] If the temperature difference is not within the preset range, the heater will continue to be controlled according to the first air supply volume and the first oil injection volume.

[0011] If the temperature difference is within a preset range, the second air volume of the fan is calculated based on the stable power, and the second oil injection quantity of the matching oil injector is calculated based on the second air volume. The heater is controlled to maintain stable heating based on the second air volume and the second oil injection quantity, so as to realize the frequency conversion control of the heater.

[0012] Compared with the prior art, the beneficial effects of this application are as follows: This application first obtains the set temperature and the current ambient temperature, and calculates the temperature difference based on the set temperature and the current ambient temperature; then, it calculates the heating cycle of the heater under different power levels based on the temperature difference, and determines the corresponding stabilizing power based on the temperature difference; then, it determines the heating power of the heater based on the heating cycle, calculates the first air volume of the fan based on the heating power, and calculates the first fuel injection quantity of the matching fuel injector based on the first air volume, and controls the heating of the heater based on the first air volume and the first fuel injection quantity; then, it determines whether the temperature difference is within a preset range; if the temperature difference is not within the preset range, it continues to calculate the heating cycle of the heater under different power levels based on the first air volume and the first fuel injection quantity. The heating of the heater is controlled by the amount of fuel injected. If the temperature difference is within a preset range, the second air volume of the fan is calculated based on the stabilization power, and the second fuel injection amount of the matching fuel injector is calculated based on the second air volume. The heater is controlled to maintain stable heating based on the second air volume and the second fuel injection amount, so as to realize the frequency conversion control of the heater. This invention realizes the frequency conversion control of the heater by controlling the air volume and fuel injection amount of the heater. At the same time, a dynamic adjustment model is generated based on the temperature difference, heating power and stabilization power to significantly reduce the energy consumption of the heater. At the same time, the heater can achieve heating and temperature stabilization in the fastest and most energy-efficient way. In addition, this invention can achieve the matching of air volume and fuel injection amount with a single motor, solving the previous technical difficulties.

[0013] Preferably, the step of calculating the heating cycle of the heater at different power levels based on the temperature difference, and determining the corresponding stable power based on the temperature difference, includes:

[0014] Acquire historical operating data of the heater at different speeds, and calculate the temperature rise of the heater at different power levels per unit time based on the historical operating data;

[0015] Calculate the ratio between the temperature difference and the temperature rise to obtain the heating cycle of the heater under different power levels;

[0016] Obtain a temperature-time mapping table, calculate the temperature change per unit time based on the temperature-time mapping table, and determine the stabilization power based on the temperature change and the temperature rise.

[0017] Preferably, the steps of determining the heating power of the heater based on the heating cycle, calculating the first air volume of the fan based on the heating power, and calculating the first fuel injection quantity of the matching fuel injector based on the first air volume include:

[0018] Based on user needs, the optimal heating cycle of the heater is selected from the heating cycles of the heater at different power levels, and the heating power of the heater is determined based on the optimal heating cycle.

[0019] Obtain the inherent parameters of the fan, and determine the first air pressure of the heater based on the inherent parameters and the heating power;

[0020] The first air volume of the fan is calculated based on the first air pressure, the heating power, and the first preset formula. The first fuel injection quantity of the matching fuel injector is then calculated based on the first air volume. The first preset formula is:

[0021] S1=(P 1 *ω 1 *3600*ω 2 *1000) / F1;

[0022] In the formula, S1 is the first air volume, P1 is the heating power, ω1 is the motor efficiency, ω2 is the mechanical transmission efficiency, and F1 is the first air pressure.

[0023] Preferably, the step of calculating the first fuel injection quantity of the matching fuel injector based on the first air volume includes:

[0024] The first combustion-supporting gas volume in the first air supply volume is calculated based on the proportion of combustion-supporting gas in the air.

[0025] The optimal combustion ratio between the first combustion-supporting gas and the fuel is determined according to the combustion equation, wherein the combustion equation is:

[0026] 2C8H 18 +2O2=16CO2+18H2O;

[0027] Based on the optimal combustion ratio and the first combustion-supporting gas volume, the first fuel injection quantity of the fuel injector is calculated to match the first air supply volume.

[0028] Preferably, the step of calculating the second air volume of the fan based on the stable power and calculating the second fuel injection quantity of the matching fuel injector according to the second air volume includes:

[0029] Obtain the fan's own parameters, and determine the second air pressure of the heater based on the fan's own parameters and the stable power.

[0030] The second air volume of the fan is calculated based on the second wind pressure, the stable power, and the second preset formula. The second fuel injection quantity of the matching fuel injector is then calculated based on the second air volume. The first preset formula is:

[0031] S2=(P 2 *ω 1 *3600*ω 2 *1000) / F2;

[0032] In the formula, S2 is the second air volume, P2 is the stabilizing power, ω1 is the motor efficiency, ω2 is the mechanical transmission efficiency, and F2 is the second air pressure.

[0033] Preferably, the step of calculating the second fuel injection quantity of the fuel injector matched with the second air volume includes:

[0034] The amount of the second combustion-supporting gas in the second air supply volume is calculated based on the proportion of combustion-supporting gas in the air.

[0035] The optimal combustion ratio between the second combustion-supporting gas and the fuel is determined based on the combustion equation, wherein the combustion equation is:

[0036] 2C8H 18 +2O2=16CO2+18H2O;

[0037] Based on the optimal combustion ratio and the second combustion-supporting gas volume, the second fuel injection quantity of the injector is calculated to match the second air supply volume.

[0038] Secondly, the invention provides the following technical solution: a variable frequency control system for a heater, the system being applied to a heater, the heater including a fan, an oil injector, a motor, and a pressure pump, the motor controlling the fan speed, and the pressure pump controlling the oil injection quantity of the oil injector; the system includes:

[0039] The acquisition module is used to acquire a set temperature and a current ambient temperature, and calculate the temperature difference based on the set temperature and the current ambient temperature;

[0040] The power determination module is used to calculate the heating cycle of the heater under different power based on the temperature difference, and to determine the corresponding stable power based on the temperature difference.

[0041] A heating module is used to determine the heating power of the heater based on the heating cycle, calculate the first air volume of the fan based on the heating power, calculate the first oil injection quantity of the matching oil injector based on the first air volume, and control the heating of the heater based on the first air volume and the first oil injection quantity.

[0042] The judgment module is used to determine whether the temperature difference is within a preset range;

[0043] The first frequency converter module is used to continue controlling the heater to heat the air according to the first air supply volume and the first oil injection volume if the temperature difference is not within the preset range.

[0044] The second frequency conversion module is used to calculate the second air volume of the fan based on the stable power and the second oil injection quantity of the matching oil injector according to the second air volume if the temperature difference is within a preset range, and control the heater to maintain stable heating according to the second air volume and the second oil injection quantity, so as to realize the frequency conversion control of the heater.

[0045] Preferably, the power determination module includes:

[0046] The acquisition submodule is used to acquire historical operating data of the heater at different speeds, and calculate the temperature rise of the heater at different power levels per unit time based on the historical operating data.

[0047] The cycle calculation submodule is used to calculate the ratio between the temperature difference and the temperature rise to obtain the heating cycle of the heater under different power levels.

[0048] The power determination submodule is used to obtain a temperature-time mapping table, calculate the temperature change per unit time based on the temperature-time mapping table, and determine the stabilization power based on the temperature change and the temperature rise.

[0049] Thirdly, the invention provides the following technical solution: a computer, including a memory, a processor, and a computer program stored in the memory and executable on the processor, wherein the processor executes the computer program to implement the above-mentioned variable frequency control method for a heater.

[0050] Fourthly, the invention provides the following technical solution: a readable storage medium storing a computer program, which, when executed by a processor, implements the aforementioned variable frequency control method for a heater. Attached Figure Description

[0051] To more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0052] Figure 1 This is a flowchart of the variable frequency control method for a heater provided in the first embodiment of the present invention;

[0053] Figure 2 This is a detailed flowchart of step S2 in the variable frequency control method for a heater provided in the first embodiment of the present invention;

[0054] Figure 3 This is a detailed flowchart of step S3 in the variable frequency control method for a heater provided in the first embodiment of the present invention;

[0055] Figure 4 This is a detailed flowchart of step S33 in the variable frequency control method for a heater provided in the first embodiment of the present invention;

[0056] Figure 5 This is a detailed flowchart of step S6 in the variable frequency control method for a heater provided in the first embodiment of the present invention;

[0057] Figure 6 This is a detailed flowchart of step S62 in the variable frequency control method for a heater provided in the first embodiment of the present invention;

[0058] Figure 7 This is a structural block diagram of the variable frequency control system for a heater provided in the second embodiment of the present invention;

[0059] Figure 8 This is a hardware structure block diagram of a computer provided for another embodiment of the present invention.

[0060] The embodiments of the present invention will be further described below with reference to the accompanying drawings. Detailed Implementation

[0061] Embodiments of the present invention are described in detail below, examples of which are illustrated in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and intended to explain embodiments of the present invention, and should not be construed as limiting the present invention.

[0062] Example 1

[0063] like Figure 1As shown, in the first embodiment of the present invention, the invention provides the following technical solution: a frequency conversion control method for a heater, the method being applied to a heater, the heater including a fan, a fuel injector, a motor, and a pressure pump, the motor being used to control the speed of the fan, the pressure pump being used to control the fuel injection quantity of the fuel injector, and the method including:

[0064] S1. Obtain the set temperature and the current ambient temperature, and calculate the temperature difference based on the set temperature and the current ambient temperature;

[0065] Specifically, the set temperature can be set by the user, and the set temperature can be operated directly on the control panel of the heater or remotely input via remote control or IoT device. The current ambient temperature can be obtained through a temperature sensor, and the temperature difference is equal to the set temperature minus the current ambient temperature.

[0066] S2. Calculate the heating cycle of the heater under different power based on the temperature difference, and determine the corresponding stable power based on the temperature difference;

[0067] Specifically, as the power changes, the heating time required for the heater to heat the room from the current ambient temperature to the set temperature will also change, meaning the corresponding heating cycle will also change, and the two are directly proportional. Therefore, in order to further shorten the heating cycle, a larger power should be selected within the allowable range, with a shorter corresponding heating cycle. At the same time, the stabilization power is specifically used when the temperature rises to around the set temperature. A stabilization power is needed to control the heater to continue heating, so as to ensure that the heated ambient temperature is always maintained at around the set temperature. The stabilization power is lower than the heating power of the heater.

[0068] like Figure 2 As shown, step S2 includes:

[0069] S21. Obtain historical operating data of the heater at different speeds, and calculate the temperature rise of the heater at different power levels per unit time based on the historical operating data.

[0070] Among them, by acquiring the historical operating data of the heater at different speeds, which represent different temperatures, a set temperature can be set simultaneously, and the time required for the heater to heat from the ambient temperature to the set temperature at different speeds can be recorded.

[0071] S22. Calculate the ratio between the temperature difference and the temperature increase to obtain the heating cycle of the heater under different power levels;

[0072] Specifically, the temperature rise represents the temperature increase per unit time. Therefore, by calculating the ratio between the temperature difference and the temperature rise, the time required for the heater to heat from the current ambient temperature to the set temperature can be obtained, i.e., the heating cycle.

[0073] S23. Obtain a temperature-time mapping table, calculate the temperature change per unit time based on the temperature-time mapping table, and determine the stabilization power based on the temperature change and the temperature rise.

[0074] Specifically, the temperature-time mapping table reflects the relationship between the rate of temperature decrease and time under the premise of no external heat source. That is, as time goes by, the temperature will become lower and lower until it is the same as the initial current ambient temperature. Therefore, based on the current heating power and the corresponding temperature change, a stable power can be determined. The stable power is lower than the current heating power, generally one-tenth to one-third of the heating power.

[0075] S3. Determine the heating power of the heater based on the heating cycle, calculate the first air volume of the fan based on the heating power, calculate the first oil injection quantity of the matching oil injector based on the first air volume, and control the heating of the heater based on the first air volume and the first oil injection quantity.

[0076] like Figure 3 As shown, step S3 includes:

[0077] S31. Select the optimal cycle based on user needs among the heating cycles of the heater under different power levels, and determine the corresponding heating power of the heater based on the optimal cycle.

[0078] Specifically, theoretically, to achieve the fastest heating, the maximum heating power corresponding to the shortest heating cycle should be selected. However, in practice, if the temperature difference between the set temperature and the current ambient temperature is not significant, there is no need to pursue the maximum heating power. Pursuing the maximum heating power would place a heavy burden on the equipment and consume a lot of energy. Therefore, the most suitable heating cycle, i.e., the optimal cycle, can be selected based on the user-input set temperature and the required heating time. In the steps above, different heating cycles have been determined according to different settings, so the corresponding heating power can be determined simply by using the optimal cycle.

[0079] S32. Obtain the inherent parameters of the fan, and determine the first air pressure of the heater based on the inherent parameters and the heating power;

[0080] Specifically, the parameters of the fan itself include the size of the fan and the tilt angle of the fan blades. Based on these parameters and the corresponding heating power, the corresponding first wind pressure can be determined after finite element analysis.

[0081] S33. Calculate the first air volume of the fan based on the first air pressure, the heating power, and the first preset formula; calculate the first fuel injection quantity of the matching fuel injector based on the first air volume, wherein the first preset formula is:

[0082] S1=(P 1 *ω 1 *3600*ω 2 *1000) / F1;

[0083] In the formula, S1 is the first air volume, P1 is the heating power, ω1 is the motor efficiency, ω2 is the mechanical transmission efficiency, and F1 is the first air pressure.

[0084] like Figure 4 As shown, step S33 includes:

[0085] S331. Calculate the first combustion-supporting gas volume in the first air supply volume based on the proportion of combustion-supporting gas in the air.

[0086] Specifically, in this step, during the actual heating process of the heater, air is introduced into the combustion chamber by a fan, and the combustion-supporting gas in the air assists in the combustion of fuel, thereby completing the heating process of the heater. The combustion-supporting gas is oxygen in the air.

[0087] S332. Determine the optimal combustion ratio between the first combustion-supporting gas and the fuel according to the combustion equation, wherein the combustion equation is:

[0088] 2C8H 18 +2O2=16CO2+18H2O;

[0089] Among them, C8H 18 This refers to diesel fuel, where O2 is oxygen, CO2 is the combustion product carbon dioxide, and H2O is the combustion product water. The above combustion equation is the optimal combustion equation for diesel fuel, and the molar ratio of fuel to oxygen is 1:1. Under this ratio, diesel fuel can burn completely and fully.

[0090] S333. Calculate the first fuel injection quantity of the fuel injector that matches the first air volume based on the optimal combustion ratio and the first combustion-supporting gas volume;

[0091] Specifically, the corresponding first fuel injection quantity can be calculated based on the optimal combustion ratio and the first combustion-supporting gas quantity. By controlling the heater under the premise of the first fuel injection quantity and the first air supply quantity, rapid heating can be achieved while ensuring complete fuel combustion.

[0092] S4. Determine whether the temperature difference is within a preset range;

[0093] Specifically, the preset range here is a relatively small range, such as -2℃ to 2℃. Theoretically, due to the error of the temperature sensor and the heating error of the heater, there is a certain error between the ambient temperature after being heated by the heater and the set temperature. The preset range can represent this error. At the same time, during the process of the heater maintaining stable heating, although the ambient temperature can theoretically remain stable, in actual environment, the temperature fluctuates within a certain range, and the fluctuation range includes the error range. The preset range includes the fluctuation range.

[0094] S5. If the temperature difference is not within the preset range, the heater continues to be controlled according to the first air supply volume and the first oil injection volume.

[0095] Specifically, the temperature difference needs to be obtained in real time. In theory, the current ambient temperature will not be higher than the set temperature. Once the ambient temperature is higher than the set temperature, heating needs to be stopped. As time goes by, the temperature gradually decreases. When the temperature difference is within the preset range, step S6 is executed.

[0096] In practice, when the temperature difference is not within the preset range, it means that the heater still needs to continue heating. Therefore, the heater continues to be controlled according to the first air volume and the first oil injection volume until the temperature difference is within the preset range, and then step S6 is executed.

[0097] S6. If the temperature difference is within a preset range, the second air volume of the fan is calculated based on the stable power, and the second oil injection volume of the matching oil injector is calculated based on the second air volume. The heater is controlled to maintain stable heating based on the second air volume and the second oil injection volume, so as to realize the frequency conversion control of the heater.

[0098] Specifically, once the temperature difference is within the preset range, it indicates that the heater has already heated the current ambient temperature to the preset temperature. If the heater is still controlled by the first air supply volume and the first oil injection volume at this point, energy consumption will increase significantly. Therefore, in this step, the operation of the heater is controlled by frequency conversion. That is, after heating to around the set temperature, the heater can be controlled by another power to maintain stable heating. In other words, heating is performed at a stable power. During the temperature stabilization process, the power required is less than the heating power, so the corresponding energy consumption will be reduced. At the same time, heating and temperature stabilization can be achieved in the fastest possible way.

[0099] like Figure 5 As shown, step S6 includes:

[0100] S61. Obtain the inherent parameters of the fan, and determine the second air pressure of the heater based on the inherent parameters and the stable power.

[0101] Specifically, the determination process of the second air pressure here is the same as that of the first air pressure in step S32 above, so it will not be repeated here. It should be noted that since the stabilization power is less than the heating power, the second air pressure is less than the first air pressure. Similarly, the second fuel injection quantity and the second air supply quantity are also less than the first fuel injection quantity and the first air supply quantity, so as to achieve the effect of reducing energy consumption.

[0102] S62. Calculate the second air volume of the fan based on the second wind pressure, the stable power, and the second preset formula; calculate the second fuel injection quantity of the matching fuel injector based on the second air volume, wherein the first preset formula is:

[0103] S2=(P 2 *ω 1 *3600*ω 2 *1000) / F2;

[0104] In the formula, S2 is the second air volume, P2 is the stabilizing power, ω1 is the motor efficiency, ω2 is the mechanical transmission efficiency, and F2 is the second air pressure.

[0105] like Figure 6 As shown, step S62 includes:

[0106] S621. Calculate the amount of the second combustion-supporting gas in the second air supply volume based on the proportion of combustion-supporting gas in the air.

[0107] S622. Determine the optimal combustion ratio between the second combustion-supporting gas and the fuel according to the combustion equation, wherein the combustion equation is:

[0108] 2C8H 18 +2O2=16CO2+18H2O;

[0109] S623. Calculate the second fuel injection quantity of the fuel injector that matches the second air volume based on the optimal combustion ratio and the second combustion-supporting gas volume;

[0110] Specifically, steps S621 to S623 are the same as steps S331 to S333 mentioned above, and the optimal combustion ratio is the same. However, the actual air volume has changed, and the corresponding combustion gas volume and fuel injection volume have also changed to ensure complete combustion of fuel and reduce energy consumption.

[0111] It is worth noting that the present invention uses one motor to match the corresponding speed, air volume and fuel injection volume, in order to solve the problem of using multiple motors to match the speed, air volume and fuel injection volume separately in the past. On the one hand, it can improve the matching accuracy, and on the other hand, it can save the corresponding usage and manufacturing costs.

[0112] The advantage of this embodiment is that: this application first obtains the set temperature and the current ambient temperature, and calculates the temperature difference based on the set temperature and the current ambient temperature; then, it calculates the heating cycle of the heater under different power levels based on the temperature difference, and determines the corresponding stabilizing power based on the temperature difference; then, it determines the heating power of the heater based on the heating cycle, calculates the first air volume of the fan based on the heating power, and calculates the first fuel injection quantity of the matching fuel injector based on the first air volume, and controls the heating of the heater based on the first air volume and the first fuel injection quantity; then, it determines whether the temperature difference is within a preset range; if the temperature difference is not within the preset range, it continues to control the heating of the heater based on the first air volume and the first fuel injection quantity. The invention controls the heating of the heater by controlling the airflow and fuel injection of the heater. If the temperature difference is within a preset range, the second airflow of the heater is calculated based on the stabilization power, and the second fuel injection quantity of the matching fuel injector is calculated based on the second airflow. The heater is controlled to maintain stable heating based on the second airflow and the second fuel injection quantity, thereby achieving variable frequency control of the heater. This invention achieves variable frequency control of the heater by controlling the airflow and fuel injection quantity of the heater. At the same time, a dynamic adjustment model is generated based on the temperature difference, heating power, and stabilization power to significantly reduce the energy consumption of the heater. It achieves heating and temperature stabilization of the heater in the fastest and most energy-efficient way. Furthermore, this invention can achieve matching of airflow and fuel injection quantity with a single motor, solving previous technical difficulties.

[0113] Example 2

[0114] like Figure 7As shown, a second embodiment of the present invention provides a variable frequency control system for a heater. The system is applied to a heater, which includes a fan, an injector, a motor, and a pressure pump. The motor controls the fan's rotational speed, and the pressure pump controls the injector's fuel injection quantity. The system includes:

[0115] Module 1 is used to acquire a set temperature and a current ambient temperature, and to calculate a temperature difference based on the set temperature and the current ambient temperature.

[0116] The power determination module 2 is used to calculate the heating cycle of the heater under different power based on the temperature difference, and to determine the corresponding stable power based on the temperature difference.

[0117] Heating module 3 is used to determine the heating power of the heater based on the heating cycle, calculate the first air volume of the fan based on the heating power and calculate the first oil injection quantity of the matching oil injector according to the first air volume, and control the heating of the heater according to the first air volume and the first oil injection quantity.

[0118] Module 4 is used to determine whether the temperature difference is within a preset range;

[0119] The first frequency conversion module 5 is used to continue controlling the heater to heat according to the first air supply volume and the first oil injection volume if the temperature difference is not within the preset range.

[0120] The second frequency conversion module 6 is used to calculate the second air volume of the fan based on the stable power and the second oil injection quantity of the matching oil injector according to the second air volume if the temperature difference is within a preset range, and control the heater to maintain stable heating according to the second air volume and the second oil injection quantity, so as to realize the frequency conversion control of the heater.

[0121] The power determination module 2 includes:

[0122] The acquisition submodule is used to acquire historical operating data of the heater at different speeds, and calculate the temperature rise of the heater at different power levels per unit time based on the historical operating data.

[0123] The cycle calculation submodule is used to calculate the ratio between the temperature difference and the temperature rise to obtain the heating cycle of the heater under different power levels.

[0124] The power determination submodule is used to obtain a temperature-time mapping table, calculate the temperature change per unit time based on the temperature-time mapping table, and determine the stabilization power based on the temperature change and the temperature rise.

[0125] The heating module 3 includes:

[0126] The heating power determination submodule is used to select the optimal cycle based on user needs in the heating cycle of the heater under different power levels, and determine the corresponding heating power of the heater based on the optimal cycle.

[0127] The first wind pressure calculation submodule is used to obtain the fan's own parameters and determine the first wind pressure of the heater based on the fan's own parameters and the heating power.

[0128] The first fuel injection quantity calculation submodule is used to calculate the first air volume of the fan based on the first air pressure, the heating power, and a first preset formula, and to calculate the first fuel injection quantity of the matching fuel injector according to the first air volume. The first preset formula is:

[0129] S1=(P 1 *ω 1 *3600*ω 2 *1000) / F1;

[0130] In the formula, S1 is the first air volume, P1 is the heating power, ω1 is the motor efficiency, ω2 is the mechanical transmission efficiency, and F1 is the first air pressure.

[0131] The first fuel injection quantity calculation submodule includes:

[0132] The first gas quantity calculation unit is used to calculate the first combustion-supporting gas quantity in the first air supply volume based on the proportion of combustion-supporting gas in the air.

[0133] The first combustion ratio determining unit is used to determine the optimal combustion ratio between the first combustion-supporting gas and the fuel according to a combustion equation, wherein the combustion equation is:

[0134] 2C8H 18 +2O2=16CO2+18H2O;

[0135] The first fuel injection quantity determination unit is used to calculate the first fuel injection quantity of the fuel injector that matches the first air volume based on the optimal combustion ratio and the first combustion-supporting gas quantity.

[0136] The second frequency converter module 6 includes:

[0137] The second wind pressure calculation submodule is used to obtain the inherent parameters of the fan and determine the second wind pressure of the heater based on the inherent parameters and the stable power.

[0138] The second fuel injection quantity calculation submodule is used to calculate the second air volume of the fan based on the second air pressure, the stabilization power, and the second preset formula, and to calculate the second fuel injection quantity of the matching fuel injector according to the second air volume. The first preset formula is:

[0139] S2=(P 2 *ω 1 *3600*ω 2 *1000) / F2;

[0140] In the formula, S2 is the second air volume, P2 is the stabilizing power, ω1 is the motor efficiency, ω2 is the mechanical transmission efficiency, and F2 is the second air pressure.

[0141] The second fuel injection quantity calculation submodule includes:

[0142] The second gas quantity determination unit is used to calculate the second combustion-supporting gas quantity in the second air supply volume based on the proportion of combustion-supporting gas in the air.

[0143] The second combustion ratio determining unit is used to determine the optimal combustion ratio between the second combustion-supporting gas and the fuel according to a combustion equation, wherein the combustion equation is:

[0144] 2C8H 18 +2O2=16CO2+18H2O;

[0145] The second fuel injection quantity determination unit is used to calculate the second fuel injection quantity of the injector that matches the second air volume based on the optimal combustion ratio and the second combustion-supporting gas quantity.

[0146] It is worth noting that when this invention is applied to a specific heater, there are two different modes. In the Internet of Things (IoT) mode, an IoT remote control method is adopted, and RS485 communication is added. Remote system control and status query are realized through DTU forwarding. At the same time, it can remotely receive data transmitted from the outside and perform adaptive learning based on temperature difference, heating cycle of different levels under the same environment, and maintenance power to generate a dynamic adjustment model. The purpose is to maintain the ambient temperature with optimal energy consumption, the fastest ambient temperature, and the best overall energy efficiency. In IoT mode, it can communicate with other devices. In stand-alone mode, it can stabilize the ambient temperature according to local parameter settings and related controls.

[0147] To avoid conflicts when performing local and remote operations simultaneously, a remote / local operation mode switching button is added to the heater. When in standalone mode, simply switch the control mode to standalone. After receiving a remote command, the device will respond with an error and will not execute the relevant command. When the device is in remote operation mode, simply switch the control mode to IoT mode. The device will no longer allow local parameter settings and related controls, and will only receive operations corresponding to remote control commands. In actual use, manual adjustment can also be used. By manually controlling the heater button, you can switch to a set power to heat and stabilize the ambient temperature. When heating at a set power, the heater will stop heating when the set temperature is reached, and after the temperature drops, it will continue heating to repeat the process to stabilize the temperature.

[0148] Meanwhile, the heater used in this invention can have a standalone mode, an Internet of Things mode, or a manual mode. That is, this invention can achieve rapid heating and temperature stabilization according to the inverter control method of the heater provided in Implementation 1. At the same time, this invention can also complete heating and repeat heating according to a set power to achieve temperature stabilization. Furthermore, this invention can also achieve heating and power regulation by manually adjusting the power.

[0149] In other embodiments of the present invention, the present invention provides the following technical solution: a computer, including a memory 102, a processor 101, and a computer program stored in the memory 102 and executable on the processor 101, wherein the processor 101 executes the computer program to implement the above-described variable frequency control method for a heater.

[0150] Specifically, the processor 101 may include a central processing unit (CPU), an application specific integrated circuit (ASIC), or one or more integrated circuits that can be configured to implement the embodiments of this application.

[0151] The memory 102 may include a mass storage device for data or instructions. For example, and not limitingly, the memory 102 may include a hard disk drive (HDD), a floppy disk drive, a solid-state drive (SSD), flash memory, an optical disk drive, a magneto-optical disk drive, magnetic tape, or a Universal Serial Bus (USB) drive, or a combination of two or more of these. Where appropriate, the memory 102 may include removable or non-removable (or fixed) media. Where appropriate, the memory 102 may be internal or external to a data processing device. In a particular embodiment, the memory 102 is non-volatile memory. In a particular embodiment, the memory 102 includes read-only memory (ROM) and random access memory (RAM). Where appropriate, the ROM may be a mask-programmed ROM, a programmable read-only memory (PROM), an erasable read-only memory (EPROM), an electrically erasable read-only memory (EEPROM), an electrically alterable read-only memory (EAROM), or flash memory, or a combination of two or more of these. Where appropriate, the RAM can be Static Random-Access Memory (SRAM) or Dynamic Random-Access Memory (DRAM). DRAM can be Fast Page Mode Dynamic Random Access Memory (FPMDRAM), Extended Data Out Dynamic Random Access Memory (EDODRAM), Synchronous Dynamic Random-Access Memory (SDRAM), etc.

[0152] The memory 102 can be used to store or cache various data files that need to be processed and / or used for communication, as well as possible computer program instructions executed by the processor 101.

[0153] The processor 101 reads and executes the computer program instructions stored in the memory 102 to implement the above-mentioned variable frequency control method for the heater.

[0154] In some embodiments, the computer may further include a communication interface 103 and a bus 100. For example, Figure 8 As shown, the processor 101, memory 102, and communication interface 103 are connected through bus 100 and complete communication with each other.

[0155] The communication interface 103 is used to enable communication between the various modules, devices, units, and / or equipment in the embodiments of this application. The communication interface 103 can also enable data communication with other components such as external devices, image / data acquisition devices, databases, external storage, and image / data processing workstations.

[0156] Bus 100 includes hardware, software, or both, that couples computer components together. Bus 100 includes, but is not limited to, at least one of the following: data bus, address bus, control bus, expansion bus, and local bus. For example, and not as a limitation, bus 100 may include an Accelerated Graphics Port (AGP) or other graphics bus, an Extended Industry Standard Architecture (EISA) bus, a Front Side Bus (FSB), a Hyper Transport (HT) interconnect, an Industry Standard Architecture (ISA) bus, an InfiniBand interconnect, a Low Pin Count (LPC) bus, a memory bus, a Micro Channel Architecture (MCA) bus, a Peripheral Component Interconnect (PCI) bus, a PCI-Express (PCI-X) bus, a Serial Advanced Technology Attachment (SATA) bus, a Video Electronics Standards Association Local Bus (VLB) bus, or other suitable buses, or a combination of two or more of these. Where appropriate, bus 100 may include one or more buses. Although specific buses are described and illustrated in the embodiments of this application, this application considers any suitable bus or interconnection.

[0157] The computer can execute the variable frequency control method of the heater according to this application based on the obtained variable frequency control system of the heater, thereby realizing the variable frequency control of the heater.

[0158] In some further embodiments of the present invention, in conjunction with the above-described variable frequency control method for a heater, the present invention provides the following technical solution: a readable storage medium storing a computer program, wherein the computer program, when executed by a processor, implements the above-described variable frequency control method for a heater.

[0159] Those skilled in the art will understand that the logic and / or steps represented in the flowchart or otherwise described herein, for example, can be considered as a sequential list of executable instructions for implementing logical functions, and can be embodied in any computer-readable medium for use by, or in conjunction with, an instruction execution system, apparatus, or device (such as a computer-based system, a processor-included system, or other system that can fetch and execute instructions from, an instruction execution system, apparatus, or device). For the purposes of this specification, "computer-readable medium" can mean any means that can contain, store, communicate, propagate, or transmit programs for use by, or in conjunction with, an instruction execution system, apparatus, or device.

[0160] More specific examples of readable media (a non-exhaustive list) include: electrical connections (electronic devices) with one or more wires, portable computer disk drives (magnetic devices), random access memory (RAM), read-only memory (ROM), erasable and editable read-only memory (EPROM or flash memory), fiber optic devices, and portable optical disc read-only memory (CDROM). Furthermore, computer-readable media can even be paper or other suitable media on which the program can be printed, since the program can be obtained electronically, for example, by optically scanning the paper or other medium, followed by editing, interpreting, or otherwise processing as necessary, and then stored in computer memory.

[0161] It should be understood that various parts of the present invention can be implemented in hardware, software, firmware, or a combination thereof. In the above embodiments, multiple steps or methods can be implemented in software or firmware stored in memory and executed by a suitable instruction execution system. For example, if implemented in hardware, as in another embodiment, it can be implemented using any one or a combination of the following techniques known in the art: discrete logic circuits having logic gates for implementing logical functions on data signals, application-specific integrated circuits (ASICs) having suitable combinational logic gates, programmable gate arrays (PGAs), field-programmable gate arrays (FPGAs), etc.

[0162] The technical features of the above embodiments can be combined in any way. For the sake of brevity, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0163] The embodiments described above are merely illustrative of several implementation methods of this application, and while the descriptions are relatively specific and detailed, they should not be construed as limiting the scope of the invention patent. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of this application, and these all fall within the protection scope of this application. Therefore, the protection scope of this patent application should be determined by the appended claims.

Claims

1. A variable frequency control method for a heater, wherein the method is applied to a heater, characterized in that, The heater includes a fan, a fuel injector, a motor, and a pressure pump. The motor controls the fan speed, and the pressure pump controls the fuel injection quantity from the fuel injector. The method includes: Obtain the set temperature and the current ambient temperature, and calculate the temperature difference based on the set temperature and the current ambient temperature; The heating cycle of the heater under different power levels is calculated based on the temperature difference, and the corresponding stable power level is determined based on the temperature difference. The heating power of the heater is determined based on the heating cycle, the first air volume of the fan is calculated based on the heating power, and the first oil injection quantity of the matching oil injector is calculated based on the first air volume. The heating of the heater is controlled based on the first air volume and the first oil injection quantity. Determine whether the temperature difference is within a preset range; If the temperature difference is not within the preset range, the heater will continue to be controlled according to the first air supply volume and the first oil injection volume. If the temperature difference is within a preset range, the second air volume of the fan is calculated based on the stable power, and the second oil injection volume of the matching oil injector is calculated based on the second air volume. The heater is controlled to maintain stable heating based on the second air volume and the second oil injection volume, so as to realize the frequency conversion control of the heater. The steps of calculating the heating cycle of the heater under different power levels based on the temperature difference, and determining the corresponding stable power level based on the temperature difference, include: Acquire historical operating data of the heater at different speeds, and calculate the temperature rise of the heater at different power levels per unit time based on the historical operating data; Calculate the ratio between the temperature difference and the temperature rise to obtain the heating cycle of the heater under different power levels; Obtain a temperature-time mapping table, calculate the temperature change per unit time based on the temperature-time mapping table, and determine the stabilization power based on the temperature change and the temperature rise. The steps of determining the heating power of the heater based on the heating cycle, calculating the first air volume of the fan based on the heating power, and calculating the first fuel injection quantity of the matching fuel injector based on the first air volume include: Based on user needs, the optimal heating cycle of the heater is selected from the heating cycles of the heater at different power levels, and the heating power of the heater is determined based on the optimal heating cycle. Obtain the inherent parameters of the fan, and determine the first air pressure of the heater based on the inherent parameters and the heating power; The first air volume of the fan is calculated based on the first air pressure, the heating power, and the first preset formula. The first fuel injection quantity of the matching fuel injector is then calculated based on the first air volume. The first preset formula is: ； In the formula, For the first air supply volume, For heating power, For motor efficiency, For mechanical transmission efficiency, The first wind pressure; The step of calculating the first fuel injection quantity of the matching fuel injector based on the first air volume includes: The first combustion-supporting gas volume in the first air supply volume is calculated based on the proportion of combustion-supporting gas in the air. The optimal combustion ratio between the first combustion-supporting gas and the fuel is determined according to the combustion equation, wherein the combustion equation is: ； The first fuel injection quantity of the fuel injector, which matches the first air volume, is calculated based on the optimal combustion ratio and the first combustion-supporting gas volume. The steps of calculating the second air volume of the fan based on the stable power and calculating the second fuel injection volume of the matching fuel injector according to the second air volume include: Obtain the fan's own parameters, and determine the second air pressure of the heater based on the fan's own parameters and the stable power. The second air volume of the fan is calculated based on the second wind pressure, the stable power, and the second preset formula. The second fuel injection quantity of the matching fuel injector is then calculated based on the second air volume. The second preset formula is: ； In the formula, For the second air supply volume, To maintain stable power, For motor efficiency, For mechanical transmission efficiency, This is the second wind pressure; The step of calculating the second fuel injection quantity of the fuel injector matched with the second air volume includes: The amount of the second combustion-supporting gas in the second air supply volume is calculated based on the proportion of combustion-supporting gas in the air. The optimal combustion ratio between the second combustion-supporting gas and the fuel is determined based on the combustion equation. Based on the optimal combustion ratio and the second combustion-supporting gas volume, the second fuel injection quantity of the injector is calculated to match the second air supply volume.

2. A variable frequency control system for a heater, wherein the system employs the variable frequency control method for a heater as described in claim 1, and the system is applied to a heater, characterized in that... The heater includes a fan, a fuel injector, a motor, and a pressure pump. The motor controls the fan speed, and the pressure pump controls the fuel injection quantity from the fuel injector. The system includes: The acquisition module is used to acquire a set temperature and the current ambient temperature, and calculate the temperature difference based on the set temperature and the current ambient temperature; The power determination module is used to calculate the heating cycle of the heater under different power based on the temperature difference, and to determine the corresponding stable power based on the temperature difference. A heating module is used to determine the heating power of the heater based on the heating cycle, calculate the first air volume of the fan based on the heating power, calculate the first oil injection quantity of the matching oil injector based on the first air volume, and control the heating of the heater based on the first air volume and the first oil injection quantity. The judgment module is used to determine whether the temperature difference is within a preset range; The first frequency converter module is used to continue controlling the heater to heat the air according to the first air supply volume and the first oil injection volume if the temperature difference is not within the preset range. The second frequency conversion module is used to calculate the second air volume of the fan based on the stable power and the second oil injection quantity of the matching oil injector according to the second air volume if the temperature difference is within a preset range, and control the heater to maintain stable heating according to the second air volume and the second oil injection quantity, so as to realize the frequency conversion control of the heater.

3. The variable frequency control system for the heater according to claim 2, characterized in that, The power determination module includes: The acquisition submodule is used to acquire historical operating data of the heater at different speeds, and calculate the temperature rise of the heater at different power levels per unit time based on the historical operating data. The cycle calculation submodule is used to calculate the ratio between the temperature difference and the temperature rise to obtain the heating cycle of the heater under different power levels. The power determination submodule is used to obtain a temperature-time mapping table, calculate the temperature change per unit time based on the temperature-time mapping table, and determine the stabilization power based on the temperature change and the temperature rise.

4. A computer, comprising a memory, a processor, and a computer program stored in the memory and executable on the processor, characterized in that, When the processor executes the computer program, it implements the variable frequency control method for the heater as described in claim 1.

5. A readable storage medium, characterized in that, The readable storage medium stores a computer program, which, when executed by a processor, implements the variable frequency control method for a heater as described in claim 1.

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