CN107238125A - Electric heater and control method and system thereof - Google Patents

Abstract

The invention discloses an electric heater and a control method and a control system thereof, wherein the electric heater comprises a silicon controlled rectifier and a relay which are connected in parallel, and the method comprises the following steps: s1, detecting the ambient temperature of the environment where the electric heater is located in real time when the electric heater starts to operate; s2, controlling the electric heater to operate for a first time at a first preset power until the current environment temperature reaches a first preset temperature; s3, calculating the ambient temperature rising rate in the first time, and calling a preset power meter according to the ambient temperature rising rate to obtain the running power of the electric heater, wherein the ambient temperature rising rate and the running power of the electric heater are in one-to-one correspondence; and S4, controlling the turn-off or the turn-on of the relay according to the running power and controlling the on-off time of the controllable silicon so as to enable the electric heater to run at the running power, thereby avoiding frequent turn-on and turn-off of the relay while realizing constant temperature heating of the electric heater. The invention also discloses a non-transitory computer readable storage medium.

Description

Electric heater and its control method and system

technical field

The invention relates to the field of electric heaters, in particular to a control method for an electric heater, a non-transitory computer-readable storage medium, a control system for an electric heater and an electric heater.

Background technique

At present, people have higher and higher requirements for the constant temperature function of electric heaters. In order to realize the constant temperature control of the electric heater, a thermocouple can be used to detect the temperature at a certain point, and the temperature is compared with the preset temperature, and then the corresponding program is set to adjust the power so that the temperature at this point reaches the preset temperature And kept.

In the related technology, an electronic control method is adopted, and a relay is installed on the power board to control the strong current by the weak current, and the gear position is controlled by controlling the relay. Due to the limitation of the structure and principle of the heating element, the existing heater generally only has three gears, such as 800W-1200W-2000W, these three gears of power cannot guarantee that each set temperature has a suitable power to keep the temperature constant. For this reason, as shown in Figure 1, when the ambient temperature Ta is lower than the preset temperature Ts, and Ta≦Ts-A (such as A=5°C), control the electric heater to heat at a high level; when Ts-A≦Ta≦Ts When -B (such as B=2℃), control the mid-range heating of the electric heater; when Ts-B≦Ta≦Ts, control the low-grade heating of the electric heater; when Ta≧Ts, control the electric heater to stop heating; when the temperature When it is lowered again, the corresponding gear heating will be resumed through the above rules. The time-varying curves of power and temperature of electric heaters in this technology are shown in Figure 2, where the high-grade is, for example, 2000W, the mid-range is, for example, 1200W, and the low-grade is, for example, 800W.

Although this technology can make the electric heater work within the set temperature range with low power, but due to the thermal inertia of the electric heater heating, that is, when the electric heater is heated to Ta≧Ts, Ta will rise by a certain amount. Value, assuming Tx, the value of Tx is related to the environment and the characteristics of the electric heater itself, so that the electric heater always works in the temperature range Ts-B≦Ta≦Tx. If B is too small, the relay corresponding to the 800W power will keep opening and closing, which will affect the service life of the relay. At the same time, the sound of the relay closing and disconnecting may also affect the user experience. If the B value is set too large, it will cause a wide range of temperature fluctuations, which will also affect the user's comfortable experience of constant temperature requirements. At the same time, the temperature of the thermal inertia electric heater reaches Tx, which is higher than the preset temperature Ts, which not only fails to meet the user's comfort needs, but also causes energy waste.

Contents of the invention

The present invention aims to solve one of the technical problems in the above-mentioned technologies at least to a certain extent.

For this reason, the first object of the present invention is to propose a control method for an electric heater, which can obtain the operating power of the electric heater according to the change of the current ambient temperature, thereby enabling the electric heater to heat at a constant temperature intelligently, and can Avoid frequent closing and opening of relays.

A second object of the present invention is to propose a non-transitory computer-readable storage medium.

The third object of the present invention is to provide a control system for an electric heater.

The fourth object of the present invention is to provide an electric heater.

In order to achieve the above object, the embodiment of the first aspect of the present invention proposes a control method for an electric heater, the electric heater includes a thyristor and a relay connected in parallel, and the method includes the following steps: S1, in the electric heater When the heater starts to operate, detect the ambient temperature of the environment where the electric heater is located in real time; S2, control the electric heater to run at the first preset power for the first time until the current ambient temperature reaches the first preset temperature; S3 , calculate the ambient temperature rise rate within the first time, and call a preset power table according to the ambient temperature rise rate to obtain the operating power of the electric heater, wherein, in the preset power table, the ambient There is a one-to-one correspondence relationship between the rate of temperature rise and the operating power of the electric heater; S4, control the switching off or closing of the relay according to the operating power, and control the on-off time of the thyristor, so that the electric heater The device operates at the stated operating power.

According to the control method of the electric heater in the embodiment of the present invention, the operating power of the electric heater is obtained by detecting the ambient temperature in real time and according to the change of the current ambient temperature, and through the opening or closing of the relay and the switching of the thyristor The electric heater is controlled by time to obtain the maximum operating power, so that the electric heater can be heated at a constant temperature, avoiding the frequent closing and opening of the relay, prolonging the electrical life of the relay, reducing noise, and reducing power consumption, saving energy Environmental protection, increasing the user's comfort experience for constant temperature requirements.

In addition, the control method of the electric heater according to the above-mentioned embodiments of the present invention may also have the following additional technical features:

According to an embodiment of the present invention, the control method further includes the following steps: S5, controlling the electric heater to run at the operating power for a preset time; S6, according to the ambient temperature change value and the preset time The preset power meter adjusts the operating power of the electric heater, and repeats steps S4-S6.

According to an embodiment of the present invention, the preset power table is a one-to-one correspondence table of ambient temperature rise rate interval-electric heater operating power-power level, and the operating power of the electric heater is calculated by the following formula:

Px=L*D*y*Pm,

Wherein, Px is the operating power of the electric heater, L is the first preset parameter, D is the power level, and D is an integer greater than or equal to 0, y is the power compensation factor, and Pm is the first preset parameter. Set power.

According to an embodiment of the present invention, in the step S3, the power compensation factor corresponding to the operating power is a first preset compensation value.

According to an embodiment of the present invention, in the step S4, it also includes: judging whether the obtained operating power is greater than or equal to the second preset power; if the operating power is greater than or equal to the second preset power, then controlling the The relay is in a closed state, and the operating power of the electric heater is adjusted by controlling the on-off time of the thyristor, so that the electric heater operates at the operating power; if the operating power is less than the For the second preset power, the relay is controlled to be in an off state, and the operating power of the electric heater is adjusted by controlling the on-off time of the thyristor, so that the electric heater operates at the operating power.

According to an embodiment of the present invention, in the step S6, it also includes: judging whether the ambient temperature change value within the preset time is greater than a second preset temperature; if the ambient temperature rise value is greater than the second preset temperature temperature, the operating power of the electric heater is lowered by one level, and the power compensation factor corresponding to the lowered operating power is the second preset compensation value, wherein the second preset compensation value is smaller than the first A preset compensation value; if the ambient temperature drop value is greater than the second preset temperature, the operating power of the electric heater is increased by one level, and the power compensation factor corresponding to the increased operating power is the first Two preset compensation values; if the ambient temperature rise value is less than or equal to the second preset temperature, the operating power of the electric heater is lowered by one level, and the power compensation factor corresponding to the lowered operating power is the The first preset compensation value; if the drop value of the ambient temperature is less than or equal to the second preset temperature, the operating power of the electric heater is increased by one level, and the power compensation factor corresponding to the increased operating power is the specified the first preset compensation value.

Furthermore, the present invention proposes a non-transitory computer-readable storage medium, on which a computer program is stored, and when the computer program is executed by a processor, the above-mentioned method for controlling an electric heater is realized.

According to the non-transitory computer-readable storage medium in the embodiment of the present invention, when the electric heater executes the computer program stored on the medium, the electric heater can be heated at a constant temperature, avoiding the frequent closing and opening of the relay, and prolonging the delay time of the relay. Long electrical life, reduced noise, and also reduced power consumption, energy saving and environmental protection, increasing the user's comfort experience for constant temperature requirements.

In order to achieve the above purpose, the embodiment of the third aspect of the present invention proposes a control system for an electric heater, the electric heater includes thyristors and relays connected in parallel, and the control system includes; a heating module; a detection module for Real-time detection of the ambient temperature of the environment where the electric heater is located and the heating time of the heating module; the control module is used to control the electric heater to operate at a first preset power when the electric heater starts to operate The first time, until the current ambient temperature reaches the first preset temperature, calculate the ambient temperature rise rate within the first time, and call the preset power meter according to the ambient temperature rise rate to obtain the operation of the electric heater Power, wherein, in the preset power meter, the ambient temperature rise rate is in one-to-one correspondence with the operating power of the electric heater; the stepless power conversion module is used to control the closing or closing of the relay according to the operating power, And controlling the on-off time of the thyristor, so that the electric heater operates at the operating power.

According to the control system of the electric heater according to the embodiment of the present invention, the operating power of the electric heater is obtained according to the change of the current ambient temperature by detecting the ambient temperature in real time, and through the opening or closing of the relay and the on-off of the thyristor The electric heater is controlled by time to obtain the maximum operating power, so that the electric heater can be heated at a constant temperature, avoiding the frequent closing and opening of the relay, prolonging the electrical life of the relay, reducing noise, and reducing power consumption, saving energy Environmental protection, increasing the user's comfort experience for constant temperature requirements.

In addition, the control system of the electric heater according to the above-mentioned embodiments of the present invention may also have the following additional technical features:

According to an embodiment of the present invention, the control module is further configured to repeatedly execute the following steps: control the electric heater to run at the operating power for a preset time; The preset power meter adjusts the operating power of the electric heater; wherein, the stepless power conversion module is also used to control the closing or closing of the relay and control the The on-off time of the thyristor, so that the electric heater operates at the adjusted operating power.

According to an embodiment of the present invention, the preset power table is a one-to-one correspondence table of ambient temperature rise rate interval-electric heater operating power-power level, and the operating power of the electric heater is calculated by the following formula:

Px=L*D*y*Pm,

Wherein, Px is the operating power of the electric heater, L is the first preset parameter, D is the power level, and D is an integer greater than or equal to 0, y is the power compensation factor, and Pm is the first preset parameter. Set power.

According to an embodiment of the present invention, when the control module invokes a preset power table according to the ambient temperature rise rate to obtain the operating power of the electric heater, the obtained power corresponding to the operating power of the electric heater The compensation factor is a first preset compensation value.

According to an embodiment of the present invention, the stepless power conversion module is specifically used to: judge whether the operating power is greater than or equal to the second preset power; if the operating power is greater than or equal to the second preset power, control The relay is in a closed state, and adjusts the operating power of the electric heater by controlling the on-off time of the thyristor, so that the electric heater operates at the operating power; if the operating power is less than the set The second preset power, then control the relay to be in the off state, and adjust the operating power of the electric heater by controlling the on-off time of the thyristor, so that the electric heater operates at the Power running.

According to an embodiment of the present invention, when the control module adjusts the operating power of the electric heater according to the ambient temperature change value within the preset time and the preset power meter, it is specifically used to: determine the Whether the ambient temperature change value within the preset time is greater than the second preset temperature; if the ambient temperature rise value is greater than the second preset temperature, the operating power of the electric heater is lowered by one level, and the lowered operation The power compensation factor corresponding to the power is a second preset compensation value, wherein the second preset compensation value is smaller than the first preset compensation value; if the ambient temperature drop value is greater than the second preset temperature, then The operating power of the electric heater is increased by one level, and the power compensation factor corresponding to the increased operating power is the second preset compensation value; if the ambient temperature rise value is less than or equal to the second preset temperature, Then the operating power of the electric heater is lowered by one level, and the power compensation factor corresponding to the lowered operating power is the first preset compensation value; if the ambient temperature drop value is less than or equal to the second preset temperature , the operating power of the electric heater is increased by one level, and the power compensation factor corresponding to the increased operating power is the first preset compensation value.

Further, the present invention proposes an electric heater, which includes: a thyristor and a relay connected in parallel; and the above-mentioned control system of the electric heater.

The electric heater in the embodiment of the present invention can realize constant temperature heating, and avoid frequent closing and opening of the relay, prolong the electrical life of the relay, reduce noise, reduce power consumption, save energy and protect the environment, and increase user confidence Comfortable experience with constant temperature requirements.

Additional aspects and advantages of the invention will be set forth in the description which follows, and in part will be obvious from the description, or may be learned by practice of the invention.

Description of drawings

The above and/or additional aspects and advantages of the present invention will become apparent and comprehensible from the description of the embodiments in conjunction with the following drawings, wherein:

Fig. 1 is the schematic diagram of the heating mode of existing a kind of electric heater;

Fig. 2 is the schematic diagram of electric heater power corresponding to Fig. 1, ambient temperature change with time;

Fig. 3 is a flowchart of a control method for an electric heater according to an embodiment of the present invention;

4 is a flowchart of a control method for an electric heater according to another embodiment of the present invention;

5 is a flowchart of a control method for an electric heater according to a specific embodiment of the present invention;

6 is a schematic structural diagram of a control system for an electric heater according to an embodiment of the present invention;

Fig. 7 is a schematic structural diagram of an electric heater according to an embodiment of the present invention.

detailed description

Embodiments of the present invention are described in detail below, examples of which are shown in the drawings, wherein the same or similar reference numerals designate the same or similar elements or elements having the same or similar functions throughout. The embodiments described below by referring to the figures are exemplary and are intended to explain the present invention and should not be construed as limiting the present invention.

The following describes the electric heater and its control method and system according to the embodiments of the present invention with reference to the accompanying drawings.

Fig. 3 is a flowchart of a method for controlling an electric heater according to an embodiment of the present invention.

In an embodiment of the invention, the electric heater includes a thyristor and a relay connected in parallel.

Specifically, the above-mentioned thyristors and relays connected in parallel can be installed on the power board of the electric heater. Wherein, the number of relays can be one, two or more.

As shown in Figure 3, the control method of the electric heater includes the following steps:

S1, when the electric heater starts to run, the ambient temperature of the environment where the electric heater is located is detected in real time.

S2. Control the electric heater to run at the first preset power for a first time until the current ambient temperature reaches the first preset temperature.

Wherein, the first preset power may be the maximum operating power of the electric heater, that is, full power, and the first time t is the time from when the electric heater starts to run until the ambient temperature reaches the first preset temperature.

It can be understood that, in order to obtain the first time t, while detecting the ambient temperature in real time, the time corresponding to each ambient temperature is also detected.

It should be noted that, when the electric heater operates at the first preset power, the control relay is in a closed state, and the control silicon controlled rectifier is turned on. It can be understood that the conduction time of the thyristor is directly proportional to the output voltage of the thyristor, and further proportional to the operating power of the electric heater, that is, the operating power of the electric heater can be adjusted through the on-off time of the thyristor.

S3. Calculate the rate of rise of the ambient temperature within the first time period, and call the preset power meter according to the rate of rise of the ambient temperature to obtain the operating power of the electric heater.

Wherein, in the preset power table, there is a one-to-one correspondence relationship between the rate of increase of the ambient temperature and the operating power of the electric heater.

In an embodiment of the present invention, the ambient temperature rise rate is calculated according to the following formula (1):

Ka=(Ts-T0)/t (1)

Among them, Ka is the rate of increase of ambient temperature, t is the first time, T0 is the initial temperature of the environment within the first time t, that is, the ambient temperature when the electric heater starts to operate, Ts is the end temperature of the environment within the first time t, Namely the first preset temperature.

In a specific embodiment of the present invention, the preset power table is shown in Table 1 below:

Table 1

In an embodiment of the present invention, the preset power table is a one-to-one correspondence table of the rate range of the ambient temperature rise - the operating power of the electric heater - the power level, and the operating power of the electric heater is calculated by the following formula (2):

Px＝L*D*y*Pm (2)

Wherein, Px is the operating power of the electric heater, L is the first preset parameter, D is the power level, and D is an integer greater than or equal to 0, y is the power compensation factor, and Pm is the first preset power.

For example, as shown in Table 1, when the ambient temperature rise rate is 0.9°C/min, the corresponding operating power of the electric heater Px=0.1*1*y*Pm=0.1*y*Pm, that is, the first preset The parameter L is 0.1, and the power level D is 1; when the ambient temperature rise rate is 0.3°C/min, the corresponding operating power of the electric heater Px=0.1*7*y*Pm=0.7*y*Pm, that is, the first preset Let the parameter L be 0.1, and the power level D be 7.

Specifically, in one embodiment of the present invention, in step S3, the power compensation factor y corresponding to the operating power is a first preset compensation value, wherein the first preset compensation value may be 1. In other words, after calculating the ambient temperature rise rate Ka within the first time period t, when the power compensation factor is 1, query the preset power table, Table 1, to obtain the operating power of the electric heater.

S4, according to the operating power, the relay is turned off or closed, and the on-off time of the thyristor is controlled, so that the electric heater operates at the operating power.

Specifically, it is determined whether the obtained operating power is greater than or equal to the second preset power; if the obtained operating power is greater than or equal to the second preset power, the control relay is in a closed state, and the electric heater is adjusted by controlling the on-off time of the thyristor. If the obtained operating power is less than the second preset power, the control relay is in the disconnected state, and the electric heater is adjusted by controlling the on-off time of the thyristor. The operating power of the heater, so that the electric heater can obtain the maximum operating power.

Wherein, the value of the second preset power is 0.4*Pm˜0.6*Pm, for example, it may be 0.5*Pm.

For example, when the operating power Px≥0.5*Pm, the control relay is closed, and the voltage is adjusted by controlling the on-off time of the thyristor to achieve the purpose of adjusting the power, so that the electric heater operates at the operating power Px; when operating When the power Px<0.5*Pm, the control relay is turned off, and the voltage is adjusted by controlling the on-off time of the thyristor to achieve the purpose of adjusting the power, so that the electric heater can run at the operating power Px.

It can be seen that during the entire power adjustment process, the operating power of the electric heater is adjusted through the on-off time of the thyristor. Only when the operating power is greater than or equal to 0.5*Pm (such as 1000W), the relay is controlled to operate. Therefore, It can avoid the electrical noise caused by the frequent on-off of the relay, and at the same time ensure that the current passing through the thyristor is halved, so that the thyristor will not be broken down under the condition of poor heat dissipation.

Further, as shown in FIG. 4, the control method of the electric heater may further include the following steps:

S5, controlling the electric heater to run at the operating power for a preset time.

In the embodiment of the present invention, the preset time may be set according to experience, for example, it may be 5-30s.

S6, adjust the operating power of the electric heater according to the ambient temperature change value within the preset time and the preset power meter, and repeat steps S4-S6 until receiving commands such as stopping heating or shutting down.

Specifically, in one embodiment of the present invention, it is judged whether the environmental temperature change value within the preset time is greater than the second preset temperature; if the ambient temperature rise value is greater than the second preset temperature, the operating power of the electric heater Down by one level, and the power compensation factor corresponding to the lowered operating power is the second preset compensation value, wherein the second preset compensation value is smaller than the first preset compensation value; if the ambient temperature drop value is greater than the second preset temperature, then increase the operating power of the electric heater by one level, and the power compensation factor corresponding to the increased operating power is the second preset compensation value; if the ambient temperature rise value is less than or equal to the second preset temperature, the electric heater The operating power of the heater is lowered by one level, and the power compensation factor corresponding to the lowered operating power is the first preset compensation value; if the ambient temperature drop is less than or equal to the second preset temperature, the operating power of the electric heater One level is increased, and the power compensation factor corresponding to the increased operating power is the first preset compensation value.

Wherein, the value of the second preset temperature is 0.4-0.6°C, for example, it may be 0.5°C.

In an example of the present invention, when the electric heater is operated at power level 3, and the operating power is 0.3*Pm, if the ambient temperature rise within 6s is 0.6°C greater than 0.5°C, the operating power of the electric heater will be lowered One level is power level 2, and the power compensation factor corresponding to the reduced operating power is the second preset compensation value 0.1, that is, the adjusted operating power is 0.2*0.1*Pm.

Furthermore, after the electric heater runs for 6 seconds at a power of 0.2*0.1*Pm, if the ambient temperature drops within 6 seconds by 0.3°C and less than 0.5°C, the operating power of the electric heater is increased by one level to power level 3, and The power compensation factor corresponding to the reduced operating power is the first preset compensation value 1, that is, the adjusted operating power is 0.3*1*Pm.

In order to facilitate understanding of the control method of the electric heater in the embodiment of the present invention, it may be described in conjunction with the specific example shown in FIG. 5 . As shown in Figure 5, the control method for the electric heater includes the following steps:

S101, the user sets the first preset temperature as Ts.

S102, detecting that the initial ambient temperature is T0.

S103, record Ts and T0, and turn on the highest operating power Pm to heat for t minutes until the ambient temperature Ta=Ts.

That is, after steps S101 and S102 are executed, the electric heater is controlled to run at the highest operating power (ie, the first preset power) for t minutes until the ambient temperature Ta=Ts.

S104. Calculate the ambient temperature rise rate Ka=(Ts-T0)/t.

S105 , look up table 1 according to Ka, and determine the next operating power Px, and set the power compensation factor y as 1 at this time.

S106, judging whether Px is greater than or equal to 0.5*Pm, if yes, execute step S107, if not, execute step S108.

S107, the control relay is in a closed state, and the operating power of the electric heater is adjusted by controlling the on-off time of the thyristor, so that the electric heater operates at Px for a preset time T.

S108, the control relay is in the disconnected state, and the operating power of the electric heater is adjusted by controlling the on-off time of the thyristor, so that the electric heater operates at the operating power Px for a preset time T.

S109, judging whether the ambient temperature Ta rises or falls by more than 0.5°C. If yes, execute steps S110 and S111; if not, execute steps S112 and S113.

S110, if the ambient temperature Ta rises, lower the power Px by one level according to Table 1, and y=0.1.

That is to say, when the rise of the current ambient temperature Ta exceeds the second preset temperature by 0.5°C, the operating power Px of the electric heater is controlled to be lowered by one level according to the preset power meter, wherein the power compensation factor is the second preset Compensation value, ie y=0.1.

S111, if the ambient temperature Ta drops, increase the power Px by one level according to Table 1, and y=0.1.

That is to say, when the drop value Ta of the current ambient temperature exceeds the second preset temperature by 0.5°C, the operating power Px of the electric heater is controlled to increase by one level according to the preset power meter, wherein the power compensation factor is the second preset temperature. Set the compensation value, ie y=0.1.

S112, if the ambient temperature Ta rises, increase the power Px by one level according to Table 1, and y=1.

That is to say, when the rise of the current ambient temperature Ta does not exceed the second preset temperature by 0.5°C, the operating power Px of the electric heater is controlled to be lowered by one level according to the preset power meter, wherein the power compensation factor y is the first The compensation value is preset, that is, y=1.

S113, if the ambient temperature Ta drops, increase the power Px by one level according to Table 1, and y=1.

That is to say, when the drop value of the current ambient temperature Ta does not exceed the second preset temperature by 0.5°C, the operating power Px of the electric heater is controlled to increase by one level according to the preset power meter, wherein the power compensation factor y is the first The compensation value is preset, that is, y=1.

It should be noted that, after the power Px is adjusted up or down, the process returns to step S106 and repeats like this until commands such as stopping heating or shutting down are received.

It can be understood that the operating power of the electric heater changes steplessly from 0 to Pm (such as 2000W). When the ambient temperature is close to the first preset temperature Ts set by the user, the operating power of the electric heater will increase with the ambient temperature. The rate Ka is adjusted, the larger the Ka, the lower the operating power of the electric heater, and the smaller the Ka, the higher the operating power of the electric heater, so as to achieve temperature stability, and the temperature rise is infinitely close to zero.

Further, by calculating the temperature rise/fall value, the power is adjusted steplessly, and the balance point of heating power and heat loss is gradually found, that is, the ambient temperature changes very little, so that the ambient temperature and the first preset temperature gradually merge into one A straight line gradually narrows the difference between the first preset temperature and the ambient temperature. As a result, the ambient temperature is always kept within a small range of the first preset temperature Ts set by the user, realizing intelligent constant temperature, thereby eliminating energy waste caused by thermal inertia, reducing power consumption, and achieving the purpose of energy saving.

Moreover, by controlling the electric heater to operate at the obtained or adjusted operating power through the disconnection or on-off of the relay and the on-off time of the thyristor, the frequent disconnection and closure of the relay is avoided, and the electrical life of the relay is prolonged.

To sum up, according to the control method of the electric heater according to the embodiment of the present invention, the ambient temperature is detected in real time, and the operating power of the electric heater is adjusted in real time according to the change of the current ambient temperature. The off time makes the electric heater run at the adjusted operating power, so that the electric heater can be intelligently heated at a constant temperature, avoiding the continuous closing and opening of the relay, prolonging the electrical life of the relay, reducing noise, and also reducing power consumption. Energy consumption, energy saving and environmental protection, increase the user's comfort experience for constant temperature requirements.

Based on the above embodiments, the present invention proposes a non-transitory computer-readable storage medium.

In an embodiment of the present invention, a computer program is stored on the non-transitory computer-readable storage medium, and when the computer program is executed by a processor, the method for controlling the electric heater in the above-mentioned embodiment is implemented.

According to the non-transitory computer-readable storage medium in the embodiment of the present invention, when the electric heater executes the computer program stored on the medium, the electric heater can be heated at a constant temperature, avoiding the frequent closing and opening of the relay, and prolonging the delay time of the relay. Long electrical life, reduced noise, and also reduced power consumption, energy saving and environmental protection, increasing the user's comfort experience for constant temperature requirements.

Fig. 6 is a schematic structural diagram of a control system of an electric heater according to an embodiment of the present invention.

In an embodiment of the invention, the electric heater includes a thyristor and a relay connected in parallel.

As shown in FIG. 6 , the control system of the electric heater includes: a heating module 10 , a detection module 20 , a control module 30 and a stepless power conversion module 40 .

Wherein, the detection module 20 is used for real-time detection of the ambient temperature of the environment where the electric heater is located and the heating time of the heating module 10 . The control module 30 is used to control the electric heater to run at the first preset power for the first time when the electric heater starts to operate until the ambient temperature reaches the first preset temperature, calculate the rate of increase of the ambient temperature within the first time, and The preset power table is invoked according to the rising rate of the ambient temperature to obtain the operating power of the electric heater, wherein, in the preset power table, the rising rate of the ambient temperature corresponds to the operating power of the electric heater. The stepless power conversion module 40 is used to control the closing or closing of the relay according to the obtained operating power of the electric heater, and control the on-off time of the thyristor, so that the electric heater operates at the operating power.

Specifically, in one embodiment of the present invention, when the control module 30 invokes the preset power table to obtain the operating power of the electric heater according to the rate of increase of the ambient temperature, the power compensation factor corresponding to the obtained operating power of the electric heater is The first preset compensation value.

The stepless power conversion module 40 is specifically used to judge whether the operating power is greater than or equal to the second preset power. If the operating power is greater than or equal to the second preset power, the control relay is in a closed state, and is adjusted by controlling the on-off time of the thyristor. The operating power of the electric heater, so that the electric heater operates at the operating power; if the operating power is less than the second preset power, the control relay is in the disconnected state, and the electric heating is adjusted by controlling the on-off time of the thyristor. The operating power of the heater, so that the electric heater operates at the operating power.

Further, in one embodiment of the present invention, the control module 30 is also used to repeat the steps of: controlling the electric heater to run for a preset time with the obtained operating power, and according to the ambient temperature change value and the preset power within the preset time The table adjusts the operating power of the electric heater. Wherein, the stepless power conversion module 40 is also used to control the switching off or closing of the relay and the on-off time of the thyristor each time the operating power is adjusted, so that the electric heater operates at the adjusted operating power.

In one embodiment of the present invention, the preset power table is a one-to-one correspondence table of ambient temperature rise rate interval-electric heater operating power-power level, and the operating power of the electric heater is calculated by the following formula (2):

Px＝L*D*y*Pm (2)

Wherein, Px is the operating power of the electric heater, L is the first preset parameter, D is the power level, and D is an integer greater than or equal to 0, y is the power compensation factor, and Pm is the first preset power.

Specifically, when the control module 30 adjusts the operating power of the electric heater according to the change value of the ambient temperature within the preset time and the preset power meter, it is specifically used to: determine whether the change value of the ambient temperature within the preset time is greater than the second preset temperature; if the ambient temperature rise value is greater than the second preset temperature, the operating power of the electric heater is lowered by one level, and the power compensation factor corresponding to the lowered operating power is the second preset compensation value, wherein, The second preset compensation value is less than the first preset compensation value; if the ambient temperature drop value is greater than the second preset temperature, the operating power of the electric heater is increased by one level, and the power compensation factor corresponding to the increased operating power is the second preset compensation value; if the ambient temperature rise value is less than or equal to the second preset temperature, the operating power of the electric heater is lowered by one level, and the power compensation factor corresponding to the lowered operating power is the first preset Compensation value; if the ambient temperature drop value is less than or equal to the second preset temperature, the operating power of the electric heater is increased by one level, and the power compensation factor corresponding to the increased operating power is the first preset compensation value.

It should be noted that, for the specific implementation manners of the control system of the electric heater in the embodiment of the present invention, reference may be made to the specific implementation manners of the control method of the electric heater in the foregoing embodiments of the present invention. To reduce redundancy, details are not repeated here.

According to the control system of the electric heater in the embodiment of the present invention, by detecting the ambient temperature in real time, and adjusting the operating power of the electric heater in real time according to the change of the current ambient temperature, the on-off time of the relay and the thyristor is used to make the The electric heater operates at the adjusted operating power, so that the electric heater can be intelligently heated at a constant temperature, avoiding the continuous closing and opening of the relay, prolonging the electrical life of the relay, reducing noise, and reducing power consumption, saving energy Environmental protection, increasing the user's comfort experience for constant temperature requirements.

Further, the present invention provides an electric heater.

Fig. 7 is a schematic structural diagram of an electric heater according to an embodiment of the present invention. As shown in FIG. 7 , the electric heater 1000 includes the control system of the electric heater of the above-mentioned embodiment, a thyristor 200 and a relay 300 connected in parallel.

The electric heater in the embodiment of the present invention adopts the control system of the electric heater in the above embodiment, detects the ambient temperature in real time, and adjusts the operating power of the electric heater in real time according to the change of the current ambient temperature. The on-off time of the thyristor makes the electric heater run at the adjusted operating power, so that the electric heater can be intelligently heated at a constant temperature, avoiding the continuous closing and opening of the relay, prolonging the electrical life of the relay, reducing noise, and It also reduces power consumption, saves energy and protects the environment, and increases the user's comfort experience for constant temperature requirements.

In addition, other configurations and functions of the electric heater in the embodiment of the present invention are known to those skilled in the art, and will not be repeated here to reduce redundancy.

It should be noted that the logic and/or steps shown in the flowchart or otherwise described herein, for example, can be considered as a sequenced list of executable instructions for implementing logical functions, and can be embodied in any computer readable medium for use by an instruction execution system, apparatus, or device (such as a computer-based system, a system including a processor, or other system that can fetch instructions from an instruction execution system, apparatus, or device and execute instructions), or in combination with these Instructions are used to execute systems, devices, or equipment. For the purposes of this specification, a "computer-readable medium" may be any device that can contain, store, communicate, propagate or transmit a program for use in or in conjunction with an instruction execution system, device or device. More specific examples (non-exhaustive list) of computer-readable media include the following: electrical connection with one or more wires (electronic device), portable computer disk case (magnetic device), random access memory (RAM), Read Only Memory (ROM), Erasable and Editable Read Only Memory (EPROM or Flash Memory), Fiber Optic Devices, and Portable Compact Disc Read Only Memory (CDROM). In addition, the computer-readable medium may even be paper or other suitable medium on which the program can be printed, since the program can be read, for example, by optically scanning the paper or other medium, followed by editing, interpretation or other suitable processing if necessary. The program is processed electronically and stored in computer memory.

It should be understood that various parts of the present invention can be realized by hardware, software, firmware or their combination. In the embodiments described above, various steps or methods may be implemented by 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 by any one or combination of the following techniques known in the art: Discrete logic circuits, ASICs with suitable combinational logic gates, programmable gate arrays (PGAs), field programmable gate arrays (FPGAs), etc.

In the description of this specification, descriptions referring to the terms "one embodiment", "some embodiments", "example", "specific examples", or "some examples" mean that specific features described in connection with the embodiment or example , structure, material or characteristic is included in at least one embodiment or example of the present invention. In this specification, schematic representations of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.

In describing the present invention, it should be understood that the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", " Back", "Left", "Right", "Vertical", "Horizontal", "Top", "Bottom", "Inner", "Outer", "Clockwise", "Counterclockwise", "Axial", The orientation or positional relationship indicated by "radial", "circumferential", etc. is based on the orientation or positional relationship shown in the drawings, and is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying the referred device or element Must be in a particular orientation, be constructed in a particular orientation, and operate in a particular orientation, and therefore should not be construed as limiting the invention.

In addition, the terms "first" and "second" are used for descriptive purposes only, and cannot be interpreted as indicating or implying relative importance or implicitly specifying the quantity of indicated technical features. Thus, the features defined as "first" and "second" may explicitly or implicitly include at least one of these features. In the description of the present invention, "plurality" means at least two, such as two, three, etc., unless specifically defined otherwise.

In the present invention, unless otherwise clearly specified and limited, terms such as "installation", "connection", "connection" and "fixation" should be understood in a broad sense, for example, it can be a fixed connection or a detachable connection , or integrated; it may be mechanically connected or electrically connected; it may be directly connected or indirectly connected through an intermediary, and it may be the internal communication of two components or the interaction relationship between two components, unless otherwise specified limit. Those of ordinary skill in the art can understand the specific meanings of the above terms in the present invention according to specific situations.

In the present invention, unless otherwise clearly specified and limited, the first feature may be in direct contact with the first feature or the first and second feature indirectly through an intermediary. touch. Moreover, "above", "above" and "above" the first feature on the second feature may mean that the first feature is directly above or obliquely above the second feature, or simply means that the first feature is higher in level than the second feature. "Below", "beneath" and "beneath" the first feature may mean that the first feature is directly below or obliquely below the second feature, or simply means that the first feature is less horizontally than the second feature.

Although the embodiments of the present invention have been shown and described above, it can be understood that the above embodiments are exemplary and should not be construed as limiting the present invention, those skilled in the art can make the above-mentioned The embodiments are subject to changes, modifications, substitutions and variations.

Claims (14)

1. A control method for an electric heater, characterized in that the electric heater comprises a thyristor and a relay connected in parallel, and the method comprises the following steps: S1, when the electric heater starts to run, detect the ambient temperature of the environment where the electric heater is located in real time; S2. Control the electric heater to run at a first preset power for a first time until the current ambient temperature reaches the first preset temperature; S3. Calculate the ambient temperature rise rate within the first time period, and call a preset power table according to the ambient temperature rise rate to obtain the operating power of the electric heater, wherein, in the preset power table, There is a one-to-one correspondence between the rate of ambient temperature rise and the operating power of the electric heater; S4. Control the relay to be turned off or on according to the operating power, and control the on-off time of the thyristor, so that the electric heater operates at the operating power. 2. The control method of an electric heater as claimed in claim 1, further comprising the following steps: S5, controlling the electric heater to run at the operating power for a preset time; S6. Adjust the operating power of the electric heater according to the change value of the ambient temperature within the preset time and the preset power meter, and repeat steps S4-S6. 3. The control method of an electric heater according to claim 2, characterized in that, the preset power table is a one-to-one correspondence table of ambient temperature rise rate interval-electric heater operating power-power level, and the electric heater The operating power of the inverter is calculated by the following formula: Px=L*D*y*Pm, Wherein, Px is the operating power of the electric heater, L is the first preset parameter, D is the power level, and D is an integer greater than or equal to 0, y is the power compensation factor, and Pm is the first preset parameter. Set power. 4. The control method of an electric heater according to claim 3, characterized in that, in the step S3, the power compensation factor corresponding to the operating power is a first preset compensation value. 5. The control method of the electric heater according to claim 2, characterized in that, in the step S4, further comprising: judging whether the obtained operating power is greater than or equal to the second preset power; If the operating power is greater than or equal to the second preset power, the relay is controlled to be in a closed state, and the operating power of the electric heater is adjusted by controlling the on-off time of the thyristor, so that the The electric heater operates at the stated operating power; If the operating power is less than the second preset power, control the relay to be in an off state, and adjust the operating power of the electric heater by controlling the on-off time of the thyristor, so that the The heater operates at operating power. 6. The control method of the electric heater according to claim 4, characterized in that, in the step S6, further comprising: judging whether the ambient temperature change value within the preset time is greater than a second preset temperature; If the ambient temperature rise value is greater than the second preset temperature, the operating power of the electric heater is lowered by one level, and the power compensation factor corresponding to the lowered operating power is the second preset compensation value, wherein, The second preset compensation value is smaller than the first preset compensation value; If the drop in ambient temperature is greater than the second preset temperature, the operating power of the electric heater is increased by one level, and the power compensation factor corresponding to the increased operating power is the second preset compensation value; If the ambient temperature rise value is less than or equal to the second preset temperature, the operating power of the electric heater is lowered by one level, and the power compensation factor corresponding to the lowered operating power is the first preset compensation value ; If the drop in ambient temperature is less than or equal to the second preset temperature, the operating power of the electric heater is increased by one level, and the power compensation factor corresponding to the increased operating power is the first preset compensation value . 7. A non-transitory computer-readable storage medium, on which a computer program is stored, characterized in that, when the computer program is executed by a processor, the electric heater according to any one of claims 1-6 is realized control method. 8. A control system for an electric heater, characterized in that the electric heater includes thyristors and relays connected in parallel, and the control system includes; heating module; A detection module, configured to detect in real time the ambient temperature of the environment where the electric heater is located and the heating time of the heating module; A control module, configured to control the electric heater to operate at a first preset power for a first time when the electric heater starts to operate until the current ambient temperature reaches the first preset temperature, and calculate the first time The ambient temperature rise rate, and call the preset power table according to the ambient temperature rise rate to obtain the operating power of the electric heater, wherein, in the preset power table, the ambient temperature rise rate is related to the operation of the electric heater Power one-to-one correspondence; The stepless power conversion module is used to control the closing or closing of the relay according to the operating power, and control the on-off time of the thyristor, so that the electric heater operates at the operating power. 9. The control system of an electric heater according to claim 8, wherein the control module is further configured to repeatedly perform the following steps: controlling the electric heater to run at the operating power for a preset time; Adjusting the operating power of the electric heater according to the ambient temperature change value within the preset time and the preset power meter; Wherein, the stepless power conversion module is also used to control the closing or closing of the relay and control the on-off time of the silicon controlled rectifier each time the operating power is adjusted, so that the electric heater Run at adjusted operating power. 10. The control system of an electric heater according to claim 9, wherein the preset power table is a one-to-one correspondence table between the range of ambient temperature rise rate-the operating power of the electric heater-power level, and the electric heater The operating power of the inverter is calculated by the following formula: Px=L*D*y*Pm, Wherein, Px is the operating power of the electric heater, L is the first preset parameter, D is the power level, and D is an integer greater than or equal to 0, y is the power compensation factor, and Pm is the first preset parameter. Set power. 11. The control system of the electric heater according to claim 10, characterized in that, when the control module invokes a preset power meter according to the rate of increase of the ambient temperature to obtain the operating power of the electric heater, the obtained The power compensation factor corresponding to the operating power of the electric heater is a first preset compensation value. 12. The control system of an electric heater according to claim 9, wherein the stepless power conversion module is specifically used for: judging whether the operating power is greater than or equal to a second preset power; If the operating power is greater than or equal to the second preset power, the relay is controlled to be in a closed state, and the operating power of the electric heater is adjusted by controlling the on-off time of the thyristor, so that the The electric heater operates at the stated operating power; If the operating power is less than the second preset power, control the relay to be in an off state, and adjust the operating power of the electric heater by controlling the on-off time of the thyristor, so that the The electric heater operates at the stated operating power. 13. The control system of an electric heater according to claim 11, wherein the control module adjusts the electric heater according to the ambient temperature change value within the preset time and the preset power meter When the operating power is used, it is specifically used for: judging whether the ambient temperature change value within the preset time is greater than a second preset temperature; If the ambient temperature rise value is greater than the second preset temperature, the operating power of the electric heater is lowered by one level, and the power compensation factor corresponding to the lowered operating power is the second preset compensation value, wherein, The second preset compensation value is smaller than the first preset compensation value; If the drop in ambient temperature is greater than the second preset temperature, the operating power of the electric heater is increased by one level, and the power compensation factor corresponding to the increased operating power is the second preset compensation value; If the ambient temperature rise value is less than or equal to the second preset temperature, the operating power of the electric heater is lowered by one level, and the power compensation factor corresponding to the lowered operating power is the first preset compensation value ; If the drop in ambient temperature is less than or equal to the second preset temperature, the operating power of the electric heater is increased by one level, and the power compensation factor corresponding to the increased operating power is the first preset compensation value . 14. An electric heater, characterized in that it comprises: SCRs and relays connected in parallel; The control system of the electric heater according to any one of claims 8-13.