Drying control method, dryer, storage medium, and electronic device

Abstract

The application provides a drying control method and a drying machine, a storage medium and an electronic device, and the method comprises the following steps: acquiring a first measured temperature of an air inlet temperature sensing bag, and acquiring an air inlet setting temperature of a drying air duct, wherein the air inlet temperature sensing bag is arranged at an air outlet of the drying air duct; adjusting a first target terminal voltage of an electric heating circuit according to the first measured temperature and the air inlet setting temperature; and controlling a working state of the electric heating circuit by using the first target terminal voltage. The technical problem of unstable drying temperature in the related art is solved, the power consumption of the whole machine during drying is reduced, the drying efficiency of the whole machine is improved, and the service life of the drying circuit and the whole machine is prolonged.

Description

Technical Field

[0001] The present invention relates to the technical field of drying, and in particular to a drying control method, a drying machine, a storage medium, and an electronic device. Background Art

[0002] In the prior art, most commercially available washer-dryers with electric heating control the electric heating within the drying duct using a mechanical relay. When the inlet air temperature sensor reaches a certain temperature, the relay turns the electric heating off, and restarts it again when the temperature drops to a certain level. This frequent start-stop control of the drying duct's outlet air temperature results in significant fluctuations in outlet air temperature, impacting the dryer's power consumption and drying efficiency, as well as shortening the lifespan of the relay, the dryer's drying components, and the overall dryer.

[0003] For the above-mentioned problems existing in related technologies, no efficient and accurate solutions have been found yet. Summary of the Invention

[0004] The present invention provides a drying control method, a drying machine, a storage medium, and an electronic device to solve the technical problem of unstable drying temperature in the related art.

[0005] According to one embodiment of the present invention, a drying control method is provided, including: obtaining a first measured temperature of an air inlet temperature sensing package, and obtaining a set air inlet temperature of a drying air duct, wherein the air inlet temperature sensing package is arranged at the air outlet of the drying air duct; adjusting a first target terminal voltage of an electric heating circuit according to the first measured temperature and the set air inlet temperature; and using the first target terminal voltage to control the working state of the electric heating circuit.

[0006] Optionally, adjusting the first target terminal voltage of the electric heating circuit according to the first measured temperature and the air inlet set temperature includes: determining whether the first measured temperature is greater than the air inlet set temperature; if the first measured temperature is greater than the air inlet set temperature, reducing the first target terminal voltage of the electric heating circuit.

[0007] Optionally, lowering the first target terminal voltage of the electric heating circuit includes: reducing the duty cycle of the thyristor on the electric heating circuit from a first duty cycle to a second duty cycle; using the second duty cycle to control the thyristor so as to reduce the terminal voltage of the electric heating circuit to the first target terminal voltage, wherein the duty cycle is positively correlated with the terminal voltage of the electric heating circuit.

[0008] Optionally, after using the first target terminal voltage to control the working state of the electric heating circuit, the method also includes: controlling the electric heating circuit to maintain working for a first period of time at the first target terminal voltage; after the first period of time is reached, obtaining the second measured temperature of the air inlet temperature sensing package; controlling the working state of the electric heating circuit according to the second measured temperature and the first preset temperature, wherein the first preset temperature is lower than the air inlet set temperature.

[0009] Optionally, controlling the working state of the electric heating circuit according to the second measured temperature and the first preset temperature includes: determining whether the second measured temperature is equal to the first preset temperature; if the second measured temperature is equal to the first preset temperature, controlling the electric heating circuit to continue working at the first target terminal voltage for a second period of time; if the second measured temperature is not equal to the first preset temperature, detecting the actual terminal voltage of the electric heating circuit, and if the actual terminal voltage is greater than the first target terminal voltage, flushing the condensing air duct of the drying air duct to make the actual terminal voltage of the electric heating circuit drop to the first target terminal voltage, and controlling the electric heating circuit to continue working at the first target terminal voltage for a second period of time.

[0010] Optionally, after controlling the working state of the electric heating circuit according to the second measured temperature and the first preset temperature, the method further includes: obtaining a third measured temperature of the air inlet temperature sensing package; judging whether the third measured temperature is greater than the air inlet set temperature; if the third measured temperature is greater than the air inlet set temperature, reducing the terminal voltage of the electric heating circuit to a second target terminal voltage through the duty cycle of the thyristor on the electric heating circuit, wherein the second target terminal voltage is less than the first target terminal voltage; controlling the electric heating circuit to maintain the second target terminal voltage for a third time; after the third time is reached, obtaining a fourth measured temperature of the air inlet temperature sensing package; judging whether the fourth measured temperature is equal to the second preset temperature, wherein the second preset temperature is greater than the first preset temperature and less than the air inlet set temperature; if the fourth measured temperature is equal to the second preset temperature, raising the terminal voltage of the electric heating circuit to the first target terminal voltage through the duty cycle of the thyristor on the electric heating circuit.

[0011] Optionally, before obtaining the first measured temperature of the air inlet temperature sensor and obtaining the set air inlet temperature of the drying duct, the method also includes: detecting a drying instruction; responding to the drying instruction, controlling the fan of the drying duct to start, and simultaneously starting the electric heating circuit to heat the air inlet of the drying duct according to the set terminal voltage, wherein the set terminal voltage is greater than the first target terminal voltage.

[0012] According to another embodiment of the present invention, a dryer is provided, including: a first acquisition module, used to obtain a first measured temperature of an air inlet temperature sensor, and to obtain a set air inlet temperature of a drying air duct, wherein the air inlet temperature sensor is arranged at the air outlet of the drying air duct; an adjustment module, used to adjust a first target terminal voltage of an electric heating circuit according to the first measured temperature and the set air inlet temperature; and a first control module, used to control the working state of the electric heating circuit using the first target terminal voltage.

[0013] Optionally, the adjustment module includes: a judgment unit for judging whether the first measured temperature is greater than the air inlet set temperature; and a reduction unit for reducing the first target terminal voltage of the electric heating circuit if the first measured temperature is greater than the air inlet set temperature.

[0014] Optionally, the reduction unit includes: a reduction subunit, used to reduce the duty cycle of the thyristor on the electric heating circuit from a first duty cycle to a second duty cycle; and a control subunit, used to control the thyristor using the second duty cycle so that the terminal voltage of the electric heating circuit is reduced to a first target terminal voltage, wherein the duty cycle is positively correlated with the terminal voltage of the electric heating circuit.

[0015] Optionally, the device also includes: a second control module, used to control the electric heating circuit to maintain operation for a first period of time at the first target terminal voltage after the first control module uses the first target terminal voltage to control the working state of the electric heating circuit; a second acquisition module, used to obtain the second measured temperature of the air inlet temperature sensing package after the first period of time is reached; a third control module, used to control the working state of the electric heating circuit according to the second measured temperature and a first preset temperature, wherein the first preset temperature is lower than the air inlet set temperature.

[0016] Optionally, the third control module includes: a judgment unit for judging whether the second measured temperature is equal to the first preset temperature; a control unit for controlling the electric heating circuit to continue working at the first target terminal voltage for a second period of time if the second measured temperature is equal to the first preset temperature; if the second measured temperature is not equal to the first preset temperature, detecting the actual terminal voltage of the electric heating circuit, and if the actual terminal voltage is greater than the first target terminal voltage, flushing the condensing air duct of the drying air duct to make the actual terminal voltage of the electric heating circuit drop to the first target terminal voltage, and controlling the electric heating circuit to continue working at the first target terminal voltage for a second period of time.

[0017] Optionally, the device further comprises: a third acquisition module, configured to acquire a third measured temperature of the inlet temperature sensing bulb after the third control module controls the working state of the electric heating circuit according to the second measured temperature and the first preset temperature; a first judgment module, configured to judge whether the third measured temperature is greater than the inlet set temperature; a fourth control module, configured to, if the third measured temperature is greater than the inlet set temperature, reduce the terminal voltage of the electric heating circuit to a second target terminal voltage through the duty cycle of the thyristor on the electric heating circuit, wherein the second target terminal voltage is less than the first target terminal voltage; a fifth control module, configured to control the electric heating circuit to maintain the second target terminal voltage for a third time length; a fourth acquisition module, configured to acquire a fourth measured temperature of the inlet temperature sensing bulb after the third time length arrives; a second judgment module, configured to judge whether the fourth measured temperature is equal to the second preset temperature, wherein the second preset temperature is greater than the first preset temperature and less than the inlet set temperature; and a sixth control module, configured to, if the fourth measured temperature is equal to the second preset temperature, increase the terminal voltage of the electric heating circuit to the first target terminal voltage through the duty cycle of the thyristor on the electric heating circuit.

[0018] Optionally, the device further comprises: a detection module, configured to detect a drying instruction before the first acquisition module acquires the first measured temperature of the inlet temperature sensing bulb and acquires the inlet set temperature of the drying air duct; and a starting module, configured to, in response to the drying instruction, control the fan of the drying air duct to start, and simultaneously control the electric heating circuit to heat the inlet air of the drying air duct according to a set terminal voltage, wherein the set terminal voltage is greater than the first target terminal voltage.

[0019] According to still another embodiment of the present application, a storage medium is provided, in which a computer program is stored, wherein the computer program is configured to execute the steps in any of the above device embodiments when running.

[0020] According to the embodiments of the present application, the first measured temperature of the inlet temperature sensing bulb is acquired, and the inlet set temperature of the drying air duct is acquired, wherein the inlet temperature sensing bulb is arranged at the air outlet of the drying air duct, the first target terminal voltage of the electric heating circuit is adjusted according to the first measured temperature and the inlet set temperature, the working state of the electric heating circuit is controlled by using the first target terminal voltage, the working state of the electric heating circuit is controlled by adjusting the terminal voltage of the electric heating circuit in real time according to the measured temperature of the inlet temperature sensing bulb and the inlet set temperature, and the heating temperature of the heating circuit is adjusted in real time, so that uninterrupted frequency conversion drying control is realized, the temperature of the hot air generated by the drying air duct is continuously constant, the temperature does not fluctuate up and down, the technical problem of unstable drying temperature in the related art is solved, the power consumption during drying of the whole machine is reduced, the drying efficiency of the whole machine is improved, and the service life of the drying circuit and the whole machine is also prolonged. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] The drawings described herein are used to provide a further understanding of the present invention and constitute a part of this application. The exemplary embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute an improper limitation of the present invention. In the drawings:

[0022] Figure 1 This is a hardware structure block diagram of a dryer according to an embodiment of the present invention;

[0023] Figure 2 is a flow chart of a drying control method according to an embodiment of the present invention;

[0024] Figure 3 is a schematic diagram of an electric heating circuit in an embodiment of the present invention;

[0025] Figure 4 This is an overall flow chart of the drying control in an embodiment of the present invention;

[0026] Figure 5 4 is a structural block diagram of a drying machine according to an embodiment of the present invention. DETAILED DESCRIPTION

[0027] In order to enable those skilled in the art to better understand the present application, the technical solutions in the embodiments of the present application will be clearly and completely described below in conjunction with the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without making creative work should fall within the scope of protection of this application. It should be noted that, in the absence of conflict, the embodiments in the present application and the features in the embodiments can be combined with each other.

[0028] It should be noted that the terms "first", "second", etc. in the specification and claims of the present application and the above-mentioned drawings are used to distinguish similar objects and are not necessarily used to describe a specific order or sequential order. It should be understood that the data used in this way can be interchangeable where appropriate, so that the embodiments of the present application described herein can be implemented in an order other than those illustrated or described herein. In addition, the terms "including" and "having" and any of their variations are intended to cover non-exclusive inclusions, for example, a process, method, product or device comprising a series of steps or units is not necessarily limited to those steps or units clearly listed, but may include other steps or units that are not clearly listed or inherent to these processes, methods, products or devices.

[0029] Example 1

[0030] The method embodiment provided in the first embodiment of the present application can be executed in a washing machine, a dryer, a washer-dryer, a controller or a similar computing device. Taking the operation on the dryer as an example, Figure 1 This is a hardware structure diagram of a dryer according to an embodiment of the present invention. Figure 1 As shown, the dryer may include one or more ( Figure 1 Only one is shown in the figure) a processor 102 (the processor 102 may include but is not limited to a microprocessor MCU or a programmable logic device FPGA and other processing devices) and a memory 104 for storing data. Optionally, the above-mentioned dryer may also include a transmission device 106 for communication functions and an input and output device 108. It will be understood by those skilled in the art that Figure 1 The structure shown is only for illustration and does not limit the structure of the above-mentioned dryer. For example, the dryer may also include Figure 1 More or fewer components than shown, or with Figure 1 Different configurations shown.

[0031] Memory 104 can be used to store dryer programs, for example, software programs and modules of application software, such as a dryer program corresponding to a dryer control method according to an embodiment of the present invention. Processor 102 executes the dryer program stored in memory 104 to execute various functional applications and data processing, thereby implementing the above-mentioned method. Memory 104 may include high-speed random access memory (RAM) and may also include non-volatile memory, such as one or more magnetic storage devices, flash memory, or other non-volatile solid-state memory. In some embodiments, memory 104 may further include memory remotely located relative to processor 102, and such remote memory may be connected to the dryer via a network. Examples of such networks include, but are not limited to, the Internet, an intranet, a local area network, a mobile communication network, and combinations thereof.

[0032] The transmission device 106 is configured to receive or transmit data via a network. A specific example of the aforementioned network may include a wireless network provided by the dryer's telecommunications provider. In one embodiment, the transmission device 106 includes a network interface controller (NIC), which can be connected to other network devices via a base station to enable communication with the Internet. In another embodiment, the transmission device 106 may be a radio frequency (RF) module, which is configured to communicate with the Internet wirelessly.

[0033] In this embodiment, a drying control method is provided. Figure 2 : is a flow chart of a drying control method according to an embodiment of the present invention. Figure 2 As shown, the process includes the following steps:

[0034] In step S202, a first measured temperature of the inlet temperature sensing bulb is obtained, and a set temperature of the inlet air of the drying air duct is obtained, wherein the inlet temperature sensing bulb is arranged at the outlet of the drying air duct.

[0035] The scheme of the embodiment can be applied to a dryer, a washing machine with a drying function, or an all-in-one machine. The outlet of the drying air duct is connected to a drying chamber or a washing chamber, and is used for drying clothes in the drying chamber. The set temperature of the inlet air is a set temperature of the drying function, and can be selected to be 50-70°C according to a set drying time and a type of clothes.

[0036] Optionally, before the first measured temperature of the inlet temperature sensing bulb is obtained, and the set temperature of the inlet air of the drying air duct is obtained, the method further includes: detecting a drying instruction; in response to the drying instruction, controlling the fan of the drying air duct to start, and simultaneously starting the electric heating circuit to heat the inlet air of the drying air duct according to a set terminal voltage, wherein the set terminal voltage is greater than a first target terminal voltage.

[0037] When the user selects the drying mode of the washing machine, the main control board starts to work after receiving the signal of the user. The voltage of the two ends of the electric heating is 220V. The fan and the electric heating start to work. The inlet temperature sensing bulb starts to contact the hot air. After a period of time t1, the inlet temperature sensing bulb detects the measured temperature T, and feeds back the detected temperature to the main control board to obtain the first measured temperature of the inlet temperature sensing bulb.

[0038] In step S204, the first target terminal voltage of the electric heating circuit is adjusted according to the first measured temperature and the set temperature of the inlet air.

[0039] The first target terminal voltage of the electric heating circuit is to adjust the current terminal voltage (such as the rated voltage after starting) of the electric heating circuit to the first target terminal voltage.

[0040] Figure 3 is a schematic diagram of the electric heating circuit in the embodiment. The silicon controlled rectifier and the terminal voltage can control the output power of the load (RL) of the electric heating circuit. The terminal voltage of the embodiment refers to the voltage between the zero line (N) and the live line (L) at the input end of the electric heating circuit. The power supply (PE) and the silicon controlled rectifier can both affect the terminal voltage. The power supply is a fixed value (220V). The embodiment controls the duty cycle of the silicon controlled rectifier, thereby controlling the voltage value of the terminal voltage, thereby controlling the current value of the electric heating resistance wire (or similar heating components), thereby controlling the heating temperature of the resistance wire, and thereby controlling the outlet temperature of the drying air duct.

[0041] In step S206, the first target terminal voltage is used to control the working state of the electric heating circuit.

[0042] In the working state of the embodiment, the current end voltage of the electric heating circuit is maintained to continue to control the electric heating circuit, the current end voltage of the electric heating circuit is lowered to continue to control the electric heating circuit, and the current end voltage of the electric heating circuit is raised to continue to control the electric heating circuit. In the case of ensuring that the electric heating circuit is not disconnected, the end voltage of the electrolytic heating circuit is adjusted to control the stability of the drying temperature.

[0043] Through the above steps, the first measured temperature of the inlet temperature sensing bag and the inlet set temperature of the drying air duct are obtained. The first target end voltage of the electric heating circuit is adjusted according to the first measured temperature and the inlet set temperature. The working state of the electric heating circuit is controlled by using the first target end voltage. The working state of the electric heating circuit is controlled by adjusting the end voltage of the electric heating circuit in real time according to the measured temperature of the inlet temperature sensing bag and the inlet set temperature. The heating temperature of the heating circuit is adjusted in real time. The uninterrupted frequency conversion drying control is realized. The temperature of the hot air generated by the drying air duct is continuously constant. The temperature does not fluctuate up and down. The technical problem of unstable drying temperature in the related art is solved. The power consumption of the whole machine during drying is reduced. The drying efficiency of the whole machine is improved. The service life of the drying circuit and the whole machine is also prolonged.

[0044] In the embodiment, adjusting the first target end voltage of the electric heating circuit according to the first measured temperature and the inlet set temperature comprises:

[0045] S11, determining whether the first measured temperature is greater than the inlet set temperature.

[0046] S12, if the first measured temperature is greater than the inlet set temperature, the first target end voltage of the electric heating circuit is lowered.

[0047] Optionally, if the first measured temperature is less than or equal to the inlet set temperature, the electric heating circuit is controlled to continue to work at the initial end voltage (set end voltage) until the measured temperature is greater than the inlet set temperature.

[0048] Optionally, lowering the first target end voltage of the electric heating circuit comprises: lowering the duty cycle of the thyristor on the electric heating circuit from the first duty cycle to the second duty cycle; the second duty cycle is used to control the thyristor, so that the end voltage of the electric heating circuit is lowered to the first target end voltage, wherein the duty cycle is positively correlated with the end voltage of the electric heating circuit.

[0049] In the embodiment, the duty cycle of the thyristor (the proportion of the conduction time to the total time in one pulse cycle) comprises multiple gradients, such as 20% to 25%, 25% to 30%, 30% to 40%, and 40% to 60%. Each gradient corresponds to a duty cycle range. By adjusting the gradient of the thyristor, the end voltage of the electric heating circuit can be changed. The greater the duty cycle, the greater the end voltage.

[0050] The main control board controls the electric heating circuit with a thyristor, which controls the voltage across the electric heating in real time. The thyristor controls the voltage across the electric heating by changing the duty cycle. The greater the duty cycle, the greater the voltage across the electric heating. Conversely, the smaller the duty cycle, the smaller the voltage across the electric heating.

[0051] T (the first measured temperature) is compared with the temperature T1 set by the main control board program. If T > T1, it indicates that the temperature measured by the temperature sensing bag is higher than the set temperature of the incoming air, which exceeds the set temperature of the incoming air. The main control board controls the duty cycle of the thyristor to be smaller, and the voltage across the electric heating is also reduced from 220V to the first target voltage U2 (200V, which is a theoretical value and may fluctuate around the theoretical value depending on the type of random voltage and load). It will continue to work at 200V for a period of time t2. If T is not greater than T1, then t1 is extended to be greater than T1, and the voltage is controlled according to the above conditions.

[0052] In this embodiment, the first target voltage U2 is 200V, the second target voltage U1 is 170V, the set voltage (rated voltage) is 220V, the actual voltage is U3 (between 203V and 210V), the set temperature of the incoming air is T1, the first preset temperature is T2 (T2 = T1 - 5℃), the measured temperature of each time is T, and the second preset temperature is T3 (T3 = T1 - 3℃).

[0053] In one embodiment of the present embodiment, after the working state of the electric heating circuit is controlled by the first target voltage, the electric heating circuit is controlled to work at the first target voltage for a first time period. After the first time period arrives, the second measured temperature of the incoming air temperature sensing bag is obtained. The working state of the electric heating circuit is controlled according to the second measured temperature and the first preset temperature, wherein the first preset temperature is less than the set temperature of the incoming air.

[0054] After working at U2 (such as 200V) for a period of time t2 (the first time period), the temperature of the hot air generated will be lower than that of the previous t1 time period, and the temperature T detected by the incoming air temperature sensing bag will also decrease.

[0055] In one example, controlling the working state of the electric heating circuit according to the second measured temperature and the first preset temperature includes: determining whether the second measured temperature is equal to the first preset temperature; if the second measured temperature is equal to the first preset temperature, controlling the electric heating circuit to continue working at the first target voltage for a second time period; if the second measured temperature is not equal to the first preset temperature, detecting the actual voltage of the electric heating circuit; if the actual voltage is greater than the first target voltage, flushing the condensing air duct of the drying air duct to reduce the actual voltage of the electric heating circuit to the first target voltage, and controlling the electric heating circuit to continue working at the first target voltage for a second time period.

[0056] In this example, the second duration is t3, if T is equal to T2, the electric heating continues to maintain the first target terminal voltage U2 to continue to work t3 (10 min), at this time, the air inlet temperature sensing bag temperature will slowly rise, after re-heating, when T>T1, the main control board will reduce the duty cycle of the thyristor, the voltage drop of the electric heating will be reduced to U1 (170V, the voltage will be basically stable at 170V according to the situation of random type and load, and the experimental voltage), the electric heating will continue to maintain U1 voltage to work for a period of time t4 (10 min).

[0057] After the voltage drops to U2, the stage of judging whether T is equal to T2 (T1-5℃), at this time, the voltage is U2, if T is not equal to T2, it indicates that U2 is not suitable for the voltage of this stage, the theoretical value of the terminal voltage is greatly different from the actual value, the voltage needs to be measured and judged, in order to reach the preset temperature, if the actual voltage U3>U2 at this time, it proves that the voltage of this stage needs to be higher than the ideal state U2, this case can prove that there are dusts blocking the air outlet in the condensing air duct, which reduces the hot air circulation efficiency of the entire drying system, the main control board opens the condensing valve in the water inlet valve to flush the condensing air duct. After continuous flushing, when U3 voltage corresponds to T greater than T1, the duty cycle of the thyristor becomes smaller, U3 is reduced to U2, and the subsequent working mode is consistent with the third working condition of the above control method.

[0058] In some embodiments, after controlling the working state of the electric heating circuit according to the second measured temperature and the first preset temperature, further comprising: obtaining a third measured temperature of the air inlet temperature sensing bag; judging whether the third measured temperature is greater than the air inlet set temperature; if the third measured temperature is greater than the air inlet set temperature, reducing the terminal voltage of the electric heating circuit to a second target terminal voltage through the duty cycle of the thyristor on the electric heating circuit, wherein the second target terminal voltage is less than the first target terminal voltage; controlling the electric heating circuit to maintain the second target terminal voltage for a third duration; after the third duration arrives, obtaining a fourth measured temperature of the air inlet temperature sensing bag; judging whether the fourth measured temperature is equal to a second preset temperature, wherein the second preset temperature is greater than the first preset temperature and less than the air inlet set temperature; if the fourth measured temperature is equal to the second preset temperature, increasing the terminal voltage of the electric heating circuit to the first target terminal voltage through the duty cycle of the thyristor on the electric heating circuit.

[0059] With the third time length t4 (10 min), after t4, the temperature of the inlet air temperature sensing bag gradually decreases, and after decreasing to the lowest temperature, gradually rises, and after 10 min, the inlet air temperature sensing bag detects whether the temperature T reaches 3℃ less than the preset temperature T1, T=T3 (T3=T1-3℃), after reaching T3, the temperature detected by the temperature sensing bag is fed back to the main control board, and the duty cycle of the thyristor is increased, and after the increase, the voltage becomes U2. Finally, by continuously changing the duty cycle of the thyristor, the electric heating is continuously adjusted between U1 and U2, and the temperature of the inlet air temperature sensing bag is finally stabilized at T=T±1℃, and the effect of constant temperature of the inlet air temperature sensing bag is realized. After the experiment, the control voltage is basically stable at U1 when T is stable and close to T1.

[0060] The scheme of the embodiment provides a novel method for controlling electric heating to dry clothes, the voltage across the electric heating is changed by the method of the thyristor, the continuous voltage change of the electric heating is realized, the effect of frequency conversion control is achieved, the power consumption of the whole machine during drying is reduced, and the drying efficiency of the whole machine is improved. Figure 4 It is the whole flow chart of the drying control in the embodiment of the application, which comprises:

[0061] The user selects the drying mode of the washing machine, and the main control board starts to work after receiving the signal of the user.

[0062] The voltage across the electric heating is 220V, the fan and the electric heating start to work, the inlet air temperature sensing bag starts to contact the hot air, after t1, the inlet air temperature sensing bag detects the measured temperature T and feeds back the detected temperature to the main control board, and compares the detected temperature with the preset temperature T1, if T>T1, it is indicated that the measured temperature of the temperature sensing bag is higher than the preset temperature, the duty cycle of the thyristor controlled by the main control board is reduced, the voltage applied to the electric heating is also reduced to U2 (200V, the voltage is determined according to the type and load of the electric heating, and the voltage is basically stable at 200V in the experiment), and the electric heating will continue to work at 200V for a period of time t2. If T is not greater than T1, t1 is extended to be greater than T1, and the voltage is controlled according to the above situation.

[0063] On the one hand, after t2, the hot air generated at U2 (200V) is lower than that in the t1 period, the temperature T detected by the inlet air temperature sensing bag is also reduced, and when the inlet air temperature sensing bag detects T=T2 (T1-5℃ (i.e. 5℃ lower than the preset temperature)), it is indicated that the temperature has been reduced to the lowest temperature, and the electric heating continues to work at U2 for t3 (10 min).

[0064] On the other hand, after the voltage drops to U2, it is determined whether T is equal to T2 (T1-5℃). At this time, the voltage is U2. When T is not equal to T2, it means that U2 is no longer suitable for the voltage of this stage. The voltage needs to be measured and determined. In order to reach the preset temperature, if the actual voltage U3>U2 at this time, it proves that the voltage of this stage needs to be higher than the ideal state U2. This situation proves that there is hair inside the condensing air duct blocking the air outlet, which reduces the hot air circulation efficiency of the entire drying system. At this time, the main control board opens the condensing valve in the water inlet valve to flush the condensing air duct. After continuous flushing, when the T corresponding to the U3 voltage is greater than T1, the duty cycle of the thyristor becomes smaller, and U3 is reduced to U2. The electric heating continues to maintain the U2 voltage and continues to work for t3 (10min);

[0065] The electric heater continues to maintain the U2 voltage and continues to work for t3. At this time, the temperature of the air inlet temperature sensor will slowly rise. After reheating, when T>T1, the main control board will reduce the duty cycle of the thyristor, and the voltage drop across the electric heater will decrease to U1 (170V, the voltage depends on the random type and load. The experiment shows that the voltage is basically stable at 200V at this time). The electric heater will continue to maintain the U1 voltage and work for a period of time t4 (10min). After t4, the temperature of the air inlet temperature sensor will gradually decrease. After decreasing to the lowest temperature, it will gradually rise again. After 10 minutes, the air inlet temperature sensor detects whether the temperature T reaches 3°C lower than the preset temperature T1, T=T3 (T3=T1-3°C). After reaching T3, the temperature sensor feeds back the detected temperature to the main control board, and the main control board increases the duty cycle of the thyristor. After the increase, the voltage becomes U2. Ultimately, by continuously changing the duty cycle of the thyristor, the electric heating continuously adjusts between the two voltages U1 and U2, and the temperature of the air inlet temperature sensor package finally stabilizes at T = T ± 1 ° C, achieving the effect of constant temperature of the air inlet temperature sensor package. After the experiment, the control voltage basically stabilizes at U1 after T stabilizes close to T1.

[0066] This embodiment employs a thyristor (SCR) to control the voltage across the drying electric heater, achieving variable-frequency control of the electric heating and maintaining a stable temperature for the inlet temperature sensor. Overtemperature and undertemperature conditions can also be quickly detected, and the voltage can be accurately adjusted to maintain a stable, preset temperature. The variable-frequency control motherboard monitors the voltage across the electric heater in real time and compares it with the set ideal voltage to determine the amount of lint in the air duct and flush it out through the condensation valve.

[0067] The drying control scheme of the embodiment controls the voltage across the drying electric heating through real-time variable frequency control of the thyristor, which is more intelligent than the traditional method of controlling 0V and 220V through relay on-off control. The actual temperature sensed by the air inlet temperature sensing bag is the same as the preset temperature required by the program by changing the duty cycle of the thyristor to realize real-time voltage change, and the power consumption during the drying mode can be reduced. Not only is the control accuracy improved compared with relay control, but also the actual voltage provided by the main control board is more accurate in judging whether too much fluff in the air duct affects the drying performance, and the condenser valve in the water inlet valve is synchronously controlled to flush the air duct.

[0068] Through the above description of the embodiments, those skilled in the art can clearly understand that the method according to the above embodiments can be realized by means of software and the necessary general hardware platform, and of course it can also be realized by hardware, but in many cases the former is a better embodiment. Based on such understanding, the technical solutions of the present application can be embodied in the form of a software product, which is stored in a storage medium (such as ROM / RAM, magnetic disk, optical disk) and includes a plurality of instructions for causing a terminal device (which can be a mobile phone, computer, server, or network device, etc.) to execute the methods described in the various embodiments of the present application.

[0069] Embodiment 2

[0070] In this embodiment, a dryer is also provided for implementing the above embodiments and preferred embodiments, which have been described and will not be repeated. The term "module" as used below can be a combination of software and hardware that implements the intended function. Although the dryer described in the following embodiments is preferably implemented in software, hardware or a combination of software and hardware can also be conceived.

[0071] Figure 5 is a structure block diagram of a dryer according to an embodiment of the present application, as Figure 5 shown, the dryer comprises:

[0072] A first acquisition module 50 is configured to acquire a first measured temperature of an air inlet temperature sensing bag and an air inlet set temperature of a drying air duct, wherein the air inlet temperature sensing bag is arranged at an air outlet of the drying air duct.

[0073] An adjustment module 52 is configured to adjust a first target terminal voltage of an electric heating circuit according to the first measured temperature and the air inlet set temperature.

[0074] A first control module 54 is configured to control a working state of the electric heating circuit by using the first target terminal voltage.

[0075] Optionally, the adjusting module comprises: a judging unit configured to judge whether the first measured temperature is greater than the inlet air setting temperature; and a reducing unit configured to reduce the first target terminal voltage of the electric heating circuit if the first measured temperature is greater than the inlet air setting temperature.

[0076] Optionally, the reducing unit comprises: a reducing sub-unit configured to reduce a duty cycle of a thyristor on the electric heating circuit from a first duty cycle to a second duty cycle; and a control sub-unit configured to control the thyristor using the second duty cycle to reduce the terminal voltage of the electric heating circuit to the first target terminal voltage, wherein the duty cycle is positively correlated with the terminal voltage of the electric heating circuit.

[0077] Optionally, the device further comprises: a second control module configured to control the electric heating circuit to maintain the working state at the first target terminal voltage for a first time length after the first control module controls the working state of the electric heating circuit using the first target terminal voltage; a second acquisition module configured to acquire a second measured temperature of the inlet air temperature sensing bulb after the first time length; and a third control module configured to control the working state of the electric heating circuit according to the second measured temperature and a first preset temperature, wherein the first preset temperature is less than the inlet air setting temperature.

[0078] Optionally, the third control module comprises: a judging unit configured to judge whether the second measured temperature is equal to the first preset temperature; and a control unit configured to control the electric heating circuit to continue working for a second time length at the first target terminal voltage if the second measured temperature is equal to the first preset temperature, and to detect an actual terminal voltage of the electric heating circuit if the second measured temperature is not equal to the first preset temperature, and to flush the condensing air duct of the drying air duct to lower the actual terminal voltage of the electric heating circuit to the first target terminal voltage and control the electric heating circuit to continue working for a second time length at the first target terminal voltage if the actual terminal voltage is greater than the first target terminal voltage.

[0079] Optionally, the device further comprises: a third acquisition module, configured to acquire a third measured temperature of the air inlet temperature sensing bulb after the third control module controls the working state of the electric heating circuit according to the second measured temperature and the first preset temperature; a first judgment module, configured to judge whether the third measured temperature is greater than the air inlet set temperature; a fourth control module, configured to, if the third measured temperature is greater than the air inlet set temperature, reduce the terminal voltage of the electric heating circuit to a second target terminal voltage through the duty cycle of the thyristor on the electric heating circuit, wherein the second target terminal voltage is less than the first target terminal voltage; a fifth control module, configured to control the electric heating circuit to maintain the second target terminal voltage for a third time length; a fourth acquisition module, configured to acquire a fourth measured temperature of the air inlet temperature sensing bulb after the third time length is reached; a second judgment module, configured to judge whether the fourth measured temperature is equal to the second preset temperature, wherein the second preset temperature is greater than the first preset temperature and less than the air inlet set temperature; and a sixth control module, configured to, if the fourth measured temperature is equal to the second preset temperature, increase the terminal voltage of the electric heating circuit to the first target terminal voltage through the duty cycle of the thyristor on the electric heating circuit.

[0080] Optionally, the device further comprises: a detection module, configured to detect a drying instruction before the first acquisition module acquires the first measured temperature of the air inlet temperature sensing bulb and acquires the air inlet set temperature of the drying air duct; and a starting module, configured to, in response to the drying instruction, control the fan of the drying air duct to start, and simultaneously start the electric heating circuit to heat the air inlet of the drying air duct at a set terminal voltage, wherein the set terminal voltage is greater than the first target terminal voltage.

[0081] It should be noted that the above various modules can be implemented by software or hardware, and for the latter, the following implementation manners can be used, but are not limited thereto: the above modules are located in the same processor; or the above various modules are located in different processors in any combination.

[0082] Embodiment 3

[0083] The embodiments of the present application also provide a storage medium in which a computer program is stored, wherein the computer program is configured to execute the steps in any of the method embodiments when running.

[0084] Optionally, in the present embodiment, the above storage medium can be configured to store a computer program for execution:

[0085] S1, acquiring a first measured temperature of an air inlet temperature sensing bulb and an air inlet set temperature of a drying air duct, wherein the air inlet temperature sensing bulb is arranged at an air outlet of the drying air duct;

[0086] S2, adjusting a first target terminal voltage of an electric heating circuit according to the first measured temperature and the inlet air setting temperature;

[0087] S3, controlling a working state of the electric heating circuit by using the first target terminal voltage.

[0088] Optionally, in the embodiment, the storage medium can include but is not limited to a U disk, a read-only memory (ROM), a random access memory (RAM), a mobile hard disk, a magnetic disk or an optical disk, and various storage media that can store computer programs.

[0089] The embodiment of the application further provides an electronic device including a memory and a processor, the memory stores a computer program, and the processor is configured to execute the computer program to perform the steps in any of the above method embodiments.

[0090] Optionally, the electronic device can further include a transmission device and an input / output device, wherein the transmission device is connected with the processor, and the input / output device is connected with the processor.

[0091] Optionally, in the embodiment, the processor can be configured to perform the following steps by using the computer program:

[0092] S1, acquiring a first measured temperature of an inlet air temperature sensing element and an inlet air setting temperature of a drying air duct, wherein the inlet air temperature sensing element is arranged at an air outlet of the drying air duct;

[0093] S2, adjusting a first target terminal voltage of an electric heating circuit according to the first measured temperature and the inlet air setting temperature;

[0094] S3, controlling a working state of the electric heating circuit by using the first target terminal voltage.

[0095] Optionally, the specific examples in the embodiment can refer to the examples described in the above embodiments and optional implementation manners, and the embodiment will not be described here.

[0096] The serial numbers of the above embodiments of the application are only for description, and do not represent the advantages and disadvantages of the embodiments.

[0097] In the above embodiments of the application, the description of each embodiment has its own emphasis, and the parts not described in detail in a certain embodiment can refer to the related description of other embodiments.

[0098] In several embodiments provided in the present application, it should be understood that the disclosed technology can be implemented in other manners. For example, the described unit embodiments can be divided into other ways, for example, the division of units is only a logical function division, and there can be another division manner in actual implementation; for example, a plurality of units or components can be combined or integrated into another system, or some features can be ignored or not executed. In addition, the displayed or discussed mutual couplings or direct couplings or communication connections can be indirect couplings or communication connections through some interfaces, accessors or modules, and can be electrical, mechanical or in other forms.

[0099] The units described as separated components can or can not be physically separated, and the components displayed as units can or can not be physical units, i.e., can be located in one place or can be distributed on a plurality of network units. Some or all of the units can be selected according to actual needs to achieve the purposes of the embodiments.

[0100] In addition, each functional unit in the embodiments of the present application can be integrated in one processing unit, or each unit can exist physically, or two or more units can be integrated in one unit. The integrated unit can be implemented in the form of hardware or in the form of a software functional unit.

[0101] If the integrated unit is implemented in the form of a software functional unit and sold or used as an independent product, it can be stored in a computer program product readable by a computer. Based on such an understanding, the technical solutions of the present application essentially or the part that makes contributions to the prior art, or all or part of the technical solutions can be embodied in the form of a software product. The computer software product is stored in a storage medium, and includes several instructions for causing a computer device (which can be a personal computer, a controller, or a network device, etc.) to execute all or part of the steps of the methods in the embodiments of the present application. The foregoing storage medium includes: a U disk, a read-only memory (ROM, Read-Only Memory), a random access memory (RAM, Random Access Memory), a mobile hard disk, a magnetic disk or an optical disk, and various other media that can store program codes.

[0102] The above are only preferred embodiments of the present application, and it should be pointed out that, for those skilled in the art, without departing from the principles of the present application, a number of improvements and refinements can be made, which should be considered as the protection scope of the present application.

Claims

1. A drying control method, characterized in that: include: Obtaining a first measured temperature of an air inlet temperature sensing package and obtaining a set air inlet temperature of the drying air duct, wherein the air inlet temperature sensing package is arranged at the air outlet of the drying air duct; adjusting a first target terminal voltage of the electric heating circuit according to the first measured temperature and the set air inlet temperature; controlling the operating state of the electric heating circuit using the first target terminal voltage; wherein, after adopting the first target terminal voltage to control the working state of the electric heating circuit, it also includes: controlling the electric heating circuit to maintain working for a first time period at the first target terminal voltage; after the first time period is reached, obtaining the second measured temperature of the air inlet temperature sensing package; controlling the working state of the electric heating circuit according to the second measured temperature and the first preset temperature, wherein the first preset temperature is lower than the air inlet set temperature; wherein, controlling the working state of the electric heating circuit according to the second measured temperature and the first preset temperature includes: judging whether the second measured temperature is equal to the first preset temperature; if the second measured temperature is equal to the first preset temperature, controlling the electric heating circuit to continue working for a second time period at the first target terminal voltage; if the second measured temperature is not equal to the first preset temperature, detecting the actual terminal voltage of the electric heating circuit, and if the actual terminal voltage is greater than the first target terminal voltage, flushing the condensing air duct of the drying air duct so that the actual terminal voltage of the electric heating circuit drops to the first target terminal voltage, and controlling the electric heating circuit to continue working for a second time period at the first target terminal voltage.

2. The method according to claim 1, characterized in that Adjusting the first target terminal voltage of the electric heating circuit according to the first measured temperature and the set air inlet temperature includes: Determining whether the first measured temperature is greater than the set air inlet temperature; If the first measured temperature is greater than the set air inlet temperature, the first target terminal voltage of the electric heating circuit is reduced.

3. The method according to claim 2, characterized in that Reducing the first target terminal voltage of the electric heating circuit includes: reducing the duty cycle of the thyristor on the electric heating circuit from a first duty cycle to a second duty cycle; The second duty cycle is used to control the thyristor so as to reduce the terminal voltage of the electric heating circuit to a first target terminal voltage, wherein the duty cycle is positively correlated with the terminal voltage of the electric heating circuit.

4. The method according to claim 1, wherein After controlling the working state of the electric heating circuit according to the second measured temperature and the first preset temperature, the method further includes: Obtaining a third measured temperature of the air inlet temperature sensing package; determining whether the third measured temperature is greater than the set air inlet temperature; If the third measured temperature is greater than the set air inlet temperature, the terminal voltage of the electric heating circuit is reduced to a second target terminal voltage by controlling the duty cycle of the thyristor on the electric heating circuit, wherein the second target terminal voltage is less than the first target terminal voltage; controlling the electric heating circuit to maintain the second target terminal voltage for a third time period; After the third time period has expired, obtaining a fourth measured temperature of the air inlet temperature sensing package; Determining whether the fourth measured temperature is equal to a second preset temperature, wherein the second preset temperature is greater than the first preset temperature and less than the air inlet set temperature; If the fourth measured temperature is equal to the second preset temperature, the terminal voltage of the electric heating circuit is increased to the first target terminal voltage through the duty cycle of the thyristor on the electric heating circuit.

5. The method according to claim 1, wherein Before obtaining the first measured temperature of the air inlet temperature sensing package and obtaining the air inlet set temperature of the drying air duct, the method further includes: Detect drying instructions; In response to the drying instruction, the fan of the drying duct is controlled to start, and at the same time, the electric heating circuit is started to heat the incoming air of the drying duct according to the set terminal voltage, wherein the set terminal voltage is greater than the first target terminal voltage.

6. A drying machine, characterized in that: include: a first acquisition module, configured to acquire a first measured temperature of an air inlet temperature sensing package and an air inlet set temperature of the drying duct, wherein the air inlet temperature sensing package is disposed at an air outlet of the drying duct; an adjustment module, configured to adjust a first target terminal voltage of the electric heating circuit according to the first measured temperature and the set air inlet temperature; a first control module, configured to control the operating state of the electric heating circuit using the first target terminal voltage; The dryer further includes: a second control module for controlling the electric heating circuit to maintain operation at the first target terminal voltage for a first period of time after the first control module uses the first target terminal voltage to control the operation state of the electric heating circuit; a second acquisition module for acquiring a second measured temperature of the air inlet temperature sensing package after the first period of time has expired; and a third control module for controlling the operation state of the electric heating circuit based on the second measured temperature and a first preset temperature, wherein the first preset temperature is lower than the air inlet set temperature. The third control module includes: a judgment unit for judging whether the second measured temperature is equal to the first preset temperature; and a control unit for controlling the electric heating circuit to continue operating at the first target terminal voltage for a second period of time if the second measured temperature is equal to the first preset temperature; and if the second measured temperature is not equal to the first preset temperature, detecting the actual terminal voltage of the electric heating circuit. If the actual terminal voltage is greater than the first target terminal voltage, flushing the condensing air duct of the drying air duct to reduce the actual terminal voltage of the electric heating circuit to the first target terminal voltage, and controlling the electric heating circuit to continue operating at the first target terminal voltage for a second period of time.

7. A storage medium, characterized in that: The storage medium stores a computer program, wherein the computer program is configured to execute the steps of the drying control method according to any one of claims 1 to 5 when running.

8. An electronic device comprising a processor, a communication interface, a memory and a communication bus, wherein: The processor, communication interface, and memory communicate with each other via a communication bus; wherein: Memory for storing computer programs; A processor, configured to execute the steps of the drying control method according to any one of claims 1 to 5 by running a program stored in a memory.

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