Food processing equipment and heating control method

Abstract

The invention provides food processing equipment and a heating control method, and relates to the field of food processing. The food processing apparatus comprises: a power supply module; a heating member; silicon controlled rectifiers; the heating detection circuit is connected between the silicon controlled rectifier and the heating piece, and the heating detection circuit is configured to detect a voltage value between the silicon controlled rectifier and the heating piece after half-wave rectification; the zero-cross detection circuit is configured to determine a voltage value state of the alternating current power supply; the voltage value state comprises that the voltage of the alternating current power supply is in a positive half cycle or a negative half cycle; and the controller is configured to determine the state of the heating tube and / or the silicon controlled rectifier according to the voltage value, the current state and a preset state relationship. Through the heating detection circuit, the state of the heating piece and / or the silicon controlled rectifier can be detected, the food processing equipment can be further controlled according to the state of the heating piece and / or the silicon controlled rectifier, and the safety of the food processing equipment is improved.

Description

Technical Field

[0001] The present application relates to the field of food processing, and in particular, to a food processing device and a heating control method. Background Art

[0002] Food processing equipment such as wall breaking machines and soy milk machines are usually equipped with a heating circuit to heat the processed food. Continuous heating of the heating circuit may pose a safety hazard. Therefore, in order to avoid abnormalities in the heating circuit, a heating detection circuit is usually set to detect whether the heating circuit is working normally.

[0003] The heating tube in the heating circuit is usually turned on and off by a thyristor. Abnormalities such as disconnection or breakdown of the thyristor may still affect the normal operation of the heating circuit. For example, if the thyristor breaks down, the heating circuit may continue to heat. When liquid is heated in the food processing equipment, continuous heating may cause the liquid to splash. If the driving circuit of the thyristor fails and cannot control the heating circuit, the food may not be heated at that time, resulting in problems such as undercooked soy milk.

[0004] At present, the heating detection circuit obtains the rectified DC voltage signal to determine whether the heating tube is abnormal, and the voltage signal is similar to the short-circuit voltage of the thyristor. Therefore, the current heating detection circuit cannot detect the abnormality of the thyristor. In addition, although there are some circuits that can detect thyristors, such circuits are usually independent circuits. Setting them only in food processing equipment will occupy a certain volume and increase the cost of food processing equipment. Summary of the invention

[0005] In view of this, the present application provides a food processing device and a heating control method to detect abnormalities in different circuits in the food processing device and improve the accuracy of controlling the food processing device.

[0006] In a first aspect, an embodiment of the present application provides a food processing device, comprising: a power module for connecting to an AC power supply; a heating element connected to the power module; a thyristor connected to the heating element and the power module; a heating detection circuit, wherein the sampling end of the heating detection circuit is connected between the thyristor and the heating element; the heating detection circuit is configured to detect the voltage value after half-wave rectification between the thyristor and the heating element; a zero-crossing detection circuit connected to the power module; the zero-crossing detection circuit is configured to determine the voltage value state of the AC power supply; the voltage value state includes whether the voltage of the AC power supply is in a positive half cycle or a negative half cycle; a controller, respectively connected to the output end of the heating detection circuit and the zero-crossing detection circuit; the controller is configured to determine the state of the heating tube and / or the thyristor according to the voltage value, the current state and a preset state relationship, wherein the preset state relationship includes the voltage value, the voltage value state and the corresponding relationship between the state of the heating tube and / or the thyristor.

[0007] In the embodiment of the present application, the heating detection circuit is arranged between the thyristor and the heating element, and the voltage value between the thyristor and the heating element can be collected, and the voltage value can be used to determine the state of the thyristor and the heating element at the same time. The heating detection circuit detects the voltage value after half-wave rectification, and the voltage value of the alternating current will be different in the positive half cycle and the negative half cycle. When the heating element and the thyristor are in different states, the voltage values ​​of the two in different half cycles of the alternating current are different. Therefore, the controller can use the voltage value detected by the heating detection circuit and the voltage value state detected by the zero-crossing detection circuit to realize the detection of the state of the thyristor and / or the heating element. Compared with the existing detection circuit, the present application can distinguish the voltage values ​​corresponding to different half cycles of the alternating current through the heating detection circuit and the zero-crossing detection circuit, and then can realize the detection of either the heating element and the thyristor according to the voltage values ​​corresponding to different half cycles of the alternating current. Compared with the method of only detecting the heating element, detecting the state of the thyristor can make the food processing equipment further controlled according to the state of the thyristor, reduce the occurrence of abnormal heating due to abnormal thyristor, and improve the safety of the food processing equipment. In addition, compared with setting up an independent circuit to detect the thyristor, the heating detection circuit in the embodiment of the present application can detect both the heating element and the thyristor, and has the characteristics of low cost and small volume.

[0008] In one embodiment, the heating detection circuit includes: a diode, a first resistor and a first capacitor; the positive electrode of the diode is the sampling end of the heating detection circuit; one end of the first resistor is connected to the cathode of the diode, and the other end of the first resistor is connected to the controller; one end of the first capacitor is connected between the cathode of the diode and the first resistor, and the other end of the first capacitor is grounded.

[0009] In the embodiment of the present application, the anode of the diode is connected to the heating element and the thyristor as a sampling terminal, and the diode allows only a portion of the alternating current to pass through, thereby realizing the collection of the voltage after half-wave rectification between the heating element and the thyristor. The first resistor can limit the current so that the voltage signal can be input into the controller, and the first capacitor filters the voltage signal, thereby, the heating detection circuit can detect an accurate voltage value, and then can judge the state of the thyristor and / or the heating element in combination with the voltage value state.

[0010] In one embodiment, the heating detection circuit also includes: a second resistor and a third resistor; the first resistor is connected to the cathode of the diode through the second resistor; one end of the third resistor is connected between the first resistor and the second resistor, and the other end of the third resistor is grounded.

[0011] In the embodiment of the present application, the second resistor and the third resistor can divide the voltage between the heating element and the thyristor, thereby protecting other components and the controller of the heating detection circuit and improving the safety and accuracy of the food processing equipment.

[0012] In one embodiment, the ratio of the resistance value of the third resistor to the sum of the resistance values ​​of the second resistor and the third resistor is less than or equal to a preset ratio; the preset ratio is the ratio of the allowable voltage of the controller pin to the maximum rated voltage of the food processing equipment.

[0013] In an embodiment of the present application, the voltage output by the controller pin is related to the resistance values ​​of the second resistor and the third resistor. The ratio of the resistance value of the third resistor to the sum of the resistance values ​​of the second resistor and the third resistor is less than or equal to a preset ratio. This can reduce the possibility of the controller pin being broken down by voltage while the food processing equipment is working normally.

[0014] In one embodiment, the charging and discharging time of the heating detection circuit is less than a first preset time.

[0015] A first capacitor is provided in the heating detection circuit, and the capacitor will cause charging and discharging. If the charging and discharging effect is more obvious, the voltage value may be fixed and maintained for a long time, and the voltage value may not reflect the difference in the positive half-cycle and negative half-cycle of the alternating current, thereby failing to realize the detection of the thyristor state. Therefore, in an embodiment of the present application, the charging and discharging time of the heating detection circuit is configured to be less than the first preset time to reduce the influence of the charging and discharging effect on the detection of the heating element state and the thyristor state.

[0016] In one embodiment, the allowable voltage of the controller pin is 5V, and the capacitance of the first capacitor is in the range of 0.1nf to 100nf.

[0017] In the embodiment of the present application, if the first capacitor is too small, the anti-interference ability of the heating detection circuit may be weakened, while if the first capacitor is too large, the charging and discharging effect may be enhanced. The allowable voltage of the pins of some common controllers is 5V. For such controllers, controlling the capacitance of the first capacitor within the range of 0.1nf to 100nf can make the heating detection circuit have better anti-interference ability and weaker charging and discharging effect.

[0018] In one embodiment, the power supply module includes an electromagnetic compatibility module, a full-wave rectifier module, and a switching power supply module; the electromagnetic compatibility module is connected to the full-wave rectifier module; the full-wave rectifier module is connected to the switching power supply module; the switching power supply module is connected to the controller; and the electromagnetic compatibility module is used to connect to the AC power supply.

[0019] In the embodiment of the present application, the electromagnetic compatibility module can improve the anti-interference ability of the food processing equipment when using AC power supply, and reduce the possibility of each circuit being affected by AC interference. The controller usually uses direct current. The AC power supply can be converted into direct current through the full-wave rectifier module, and then through the switching power supply module, the direct current output by the full-wave rectifier module is limited to the direct current that can be used by the controller. Through the power supply module, each circuit or component including the controller in the food processing equipment can have a higher safety when using AC power supply.

[0020] In one embodiment, the food processing equipment further includes: a containing structure having a containing cavity for containing food; the containing cavity is located within the heating area of ​​the heating element; the containing structure is communicatively connected to the controller; and the controller is further configured to control the containing structure to discharge the food in the containing cavity after determining that the thyristor is in an abnormal state.

[0021] When the thyristor is abnormal, the thyristor may not be able to accurately control the operation of the heating element, which may cause safety problems such as liquid splashing and insufficient heating of food. In the embodiment of the present application, after the thyristor is abnormal, the control containment structure is used to discharge the food in the containment cavity, so that the food processing equipment does not heat the food, thereby reducing the occurrence of safety problems and improving the safety of the food processing equipment.

[0022] In one embodiment, the food processing equipment further includes: a temperature detection module configured to detect the temperature in the containing chamber; the controller is also configured to control the containing structure to discharge the food in the containing chamber when it is determined that the thyristor is abnormal and the temperature in the containing chamber is greater than a preset temperature threshold.

[0023] When foods containing liquids boil, the liquid may splash. In an embodiment of the present application, the temperature in the containing chamber is detected, and heating is continued when the temperature is insufficient to reduce the occurrence of unheated food. When it is determined that the thyristor is abnormal and the temperature in the containing chamber is greater than a preset temperature threshold, the containing structure is controlled to discharge the food in the containing chamber, so that the food processing equipment no longer continues to heat the food to reduce the possibility of liquid splashing. As a result, the safety of the food processing equipment can be improved.

[0024] In one embodiment, the food processing equipment includes a first motor, which is communicatively connected to the controller; the containing structure includes a crushing cup and a discharge valve; the crushing cup has a containing cavity and a food outlet; the discharge valve includes a discharge outlet and a second motor; the second motor is used to drive a switch of the discharge outlet; the food outlet of the crushing cup is connected to the discharge outlet of the discharge valve; the second motor is communicatively connected to the controller; the first motor is configured to start in response to an instruction from the controller to discharge food; and the controller is also configured to control the second motor to open the discharge outlet after the first motor is started for a preset period of time to discharge the food in the containing cavity.

[0025] Some food processing equipment will process solid food. If there are large solids in the food heating equipment, the discharge channel of the containing chamber may be blocked. In the embodiment of the present application, the first motor of the crushing cup is started and continued for a preset time, so that the crushing cup can fully crush the solid food in the containing chamber and then open the discharge port to discharge the food, thereby reducing the possibility of food blocking the discharge port.

[0026] In a second aspect, an embodiment of the present application provides a heating control method, which is applied to a controller in the food processing equipment described in any one of the first aspects, and the heating control method includes: obtaining a voltage value through the heating detection circuit; obtaining a voltage value state corresponding to the voltage value through the zero-crossing detection circuit; the voltage value state includes whether the voltage of the AC power supply is in a positive half cycle or a negative half cycle; determining the state of the heating element and / or the thyristor according to the voltage value, the voltage value state and a preset state relationship, and the preset state relationship includes the corresponding relationship between the voltage value, the voltage value state and the state of the heating element and / or the thyristor.

[0027] In the embodiment of the present application, the controller is connected to the heating detection circuit and the zero-crossing detection circuit of the food processing equipment, and the voltage value and the voltage value state can be obtained. The voltage value is different in different half cycles of the alternating current. The corresponding relationship between the voltage value, the voltage value state and the state of the heating element and / or the thyristor is set by the preset state relationship, thereby, the judgment of the state of the heating element and / or the thyristor can be realized. Compared with the existing detection method, the present application can distinguish the voltage values ​​corresponding to different half cycles of the alternating current through the heating detection circuit and the zero-crossing detection circuit, and then can realize the detection of either the heating element and the thyristor according to the voltage values ​​corresponding to different half cycles of the alternating current. Compared with the method of only detecting the heating element, detecting the state of the thyristor can make the food processing equipment further controlled according to the thyristor state, reduce the occurrence of abnormal heating caused by abnormal thyristor, and improve the safety of the food processing equipment. In addition, compared with the thyristor detected by the independent circuit, the voltage value detected by the heating detection circuit in the embodiment of the present application can be used for both the judgment of the state of the heating element and the judgment of the state of the thyristor, which has the characteristics of low cost and small volume.

[0028] In one embodiment, determining the state of the heating element and / or the thyristor according to the voltage value, the voltage value state and the preset state relationship includes: determining two different half cycles based on the voltage value state; the two different half cycles include a positive half cycle and a negative half cycle; if the voltage values ​​of the two different half cycles are the same, then determining the state of the heating element based on the voltage values ​​corresponding to the two different half cycles and the preset state relationship; if the voltage values ​​of the two different half cycles are different, then determining the state of the thyristor based on the voltage values ​​corresponding to the two different half cycles and the preset state relationship.

[0029] In the embodiment of the present application, the heating detection circuit performs half-wave rectification on the alternating current, so that the voltage value is different in the negative half cycle and the positive half cycle. Therefore, two different half cycles can be determined based on the voltage value state, and then the voltage values ​​corresponding to the two different half cycles can be compared. The heating element converts electrical energy into thermal energy through a resistor. The abnormality of the heating element is usually only a circuit break, and the voltage cannot be detected after the circuit break of the heating element. Therefore, the abnormality of the heating element can be judged based on whether the voltages of the two half cycles are the same. Correspondingly, after half-wave rectification of the heating detection current, the voltage value of the alternating current will be different in the positive half cycle and the negative half cycle. Therefore, the state of the thyristor can be determined based on the different voltage values, that is, the preset state relationship. Through the above method, the judgment of the state of the heating element and the thyristor can be realized, the heating of the food processing equipment can be assisted and controlled, and the safety of the food processing equipment can be improved.

[0030] In one embodiment, the preset state relationship includes: if the voltage value is always 0 when the voltage value state is in the negative half cycle and the positive half cycle, it is determined that the heating element is disconnected; if the voltage value state is in the negative half cycle and the voltage value is greater than zero, or the voltage value state is in the positive half cycle and the voltage value is 0, it is determined that the thyristor is disconnected; if the current is in the positive half cycle and the voltage value is greater than positive, or the current is in the negative half cycle and the voltage value is 0, it is determined that the thyristor is turned on.

[0031] In the embodiment of the present application, the heating element is connected to the zero line, and the thyristor is connected to the live line. When the heating tube is disconnected due to a fault, the heating tube is short-circuited, and the heating detection circuit cannot detect the voltage value, that is, the voltage value of the detected voltage value is 0, thereby, the detection of the disconnection of the heating element can be realized. When the thyristor is controlled to be disconnected, in the negative half cycle of the alternating current, the voltage will flow back from the zero line to the live line, and the voltage value is greater than zero at this time. Since the heating detection circuit has the function of half-wave rectification, in the negative half cycle of the alternating current, the voltage cannot pass through the heating electric detection circuit, and the voltage value is equal to 0 at this time, thereby, the judgment of the disconnection of the thyristor can be realized. When the thyristor is controlled to be turned on, in the positive half cycle of the alternating current, the voltage will flow back from the live line to the zero line, and the voltage value is greater than zero at this time. On the contrary, in the negative half cycle of the alternating current, the voltage cannot pass through the heating electric detection circuit, and the voltage value is equal to 0 at this time, thereby, the judgment of the conduction of the thyristor can be realized. Through the above-mentioned preset state relationship, the judgment of the state of the heating element and the thyristor can be realized, so that the food processing equipment can pass the thyristor.

[0032] In one embodiment, obtaining voltage through the heating detection circuit includes: obtaining multiple sampled voltage values ​​through the heating detection circuit based on a preset sampling frequency within a second preset time length within the same half cycle of the current; the second preset time length is less than the length of one and a half cycles of the current; and determining the average value of the multiple sampled voltage values ​​as the voltage value.

[0033] In an embodiment of the present application, multiple sampled voltage values ​​are obtained at a preset sampling frequency, and the average value is calculated as the required voltage value, thereby reducing the situation where some voltage values ​​are inaccurate due to interference from the AC zero-crossing signal, improving the accuracy of the voltage value, and thus improving the accuracy of the judgment of the state of the thyristor and / or the heating element.

[0034] In one embodiment, after determining the state of the heating element and / or the thyristor according to the voltage value, the current state and the preset state relationship, the method further includes: detecting whether there are abnormalities in multiple consecutive cycles of the alternating current; wherein each of the cycles includes multiple half-waves; for each of the cycles: judging whether the thyristor and / or the heating element are abnormal in each half-wave in the cycle based on the control signal of the thyristor in each half-wave in the cycle, the voltage value state, and the voltage value; if the thyristor and / or the heating element is abnormal, accumulating the abnormal value; the control signal is used to control the thyristor to be turned on or off; when the abnormal value is greater than a second preset threshold value, confirming that the cycle is abnormal; if multiple consecutive cycles are abnormal, issuing an alarm signal.

[0035] In the embodiment of the present application, the voltage value and the voltage value state can characterize the state of the thyristor and / or the heating tube, and then the state of the thyristor and / or the heating tube is compared with the control signal to determine whether the thyristor and the heating tube are abnormal. After determining that the thyristor and / or the heating element are abnormal, the abnormal value is accumulated, and when the abnormal value is greater than the second threshold, the cycle abnormality is confirmed to reduce the possibility of misjudgment. After multiple consecutive cycle abnormalities, an alarm signal is issued to warn the user to handle it in time and improve the safety of food processing. BRIEF DESCRIPTION OF THE DRAWINGS

[0036] In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings required for use in the embodiments of the present application will be briefly introduced below. It should be understood that the following drawings only show certain embodiments of the present application and therefore should not be regarded as limiting the scope. For ordinary technicians in this field, other related drawings can be obtained based on these drawings without paying creative work.

[0037] Figure 1 A schematic diagram of a food processing device provided in one embodiment of the present application;

[0038] Figure 2 A circuit diagram of a food processing device provided in one embodiment of the present application;

[0039] Figure 3 A schematic diagram of a voltage waveform provided in an embodiment of the present application;

[0040] Figure 4 A schematic diagram of the structure of a food processing device provided in one embodiment of the present application;

[0041] Figure 5 This is a flow chart of a heating control method provided in one embodiment of the present application.

[0042] Icons: power module 110; electromagnetic compatibility module 111; full-wave rectifier module 112; switching power supply module 113; heating drive circuit 120; heating element 121; thyristor 122; heating detection circuit 130; zero-crossing detection circuit 140; controller 150; containing structure 210; first motor 221; crushing knife 222; discharge port 231; second motor 232. DETAILED DESCRIPTION

[0043] In order to make the purpose, technical solution and advantages of the embodiments of the present application more clear, the present application is further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described here are only used to explain the present application and are not used to limit the present application.

[0044] See also Figure 1 , Figure 1 This is a schematic diagram of a food processing device provided in an embodiment of the present application. The food processing device includes: a power module 110 , a heating drive circuit 120 , a heating detection circuit 130 , a zero-crossing detection circuit 140 and a controller 150 .

[0045] The power module 110 is used to connect to an alternating current power source.

[0046] The heating driving circuit 120 includes a heating element 121 and a thyristor 122. The heating element 121 is connected to the power module 110. The thyristor 122 is connected to the heating element 121 and the power module 110.

[0047] The heating detection circuit 130 has a sampling terminal connected between the thyristor 122 and the heating element 121. The heating detection circuit 130 is configured to detect a half-wave rectified voltage value between the thyristor and the heating element.

[0048] The zero-crossing detection circuit 140 is connected to the power module 110. The zero-crossing detection circuit 140 is configured to determine the voltage value state of the AC power supply. The voltage value state includes whether the voltage of the AC power supply is in a positive half cycle or a negative half cycle.

[0049] The controller 150 is connected to the output end of the heating detection circuit 130 and the zero-crossing detection circuit 140, respectively. The controller is configured to determine the state of the heating element 121 and / or the thyristor 122 according to the voltage value, the current state and the preset state relationship. The preset state relationship includes the corresponding relationship between the voltage value, the voltage value state and the state of the heating tube and / or the thyristor. Next, the food processing equipment provided in the embodiment of the present application will be described.

[0050] The power module 110 is used to connect to an AC power source, where the AC power source may be a mains supply, a generator, or the like.

[0051] See also Figure 2 , Figure 2 A circuit diagram of a food processing device provided in an embodiment of the present application, wherein ACL and ACN are connected to the live wire and the neutral wire of the AC power source respectively, and PL and PN represent the live wire and the neutral wire respectively.

[0052] In one embodiment, the power module 110 may include an electromagnetic compatibility module 111 , a full-wave rectifier module 112 , and a switching power module 113 .

[0053] In this embodiment, the input end of the electromagnetic compatibility module 111 can be connected to the neutral wire and the live wire of the AC power supply to perform electromagnetic compatibility processing on the AC power to reduce the electromagnetic interference caused by the AC power supply to the food processing equipment, improve the stability of the input AC power, and thus improve the anti-interference ability and safety of the food processing equipment.

[0054] In this embodiment, the input end of the full-wave rectifier module 112 is connected to the output end of the electromagnetic compatibility module 111, and the full-wave rectifier module 112 can perform full-wave rectification on the alternating current to convert it into direct current. The output end of the full-wave rectifier module 112 is connected to the input end of the switching power supply module 113, and the output end of the switching power supply module 113 is connected to the power supply end of the controller 150. The switching power supply module 113 can adjust the direct current and convert it into direct current that can be used by the controller 150 to power the controller 150.

[0055] Among them, Figure 2 As shown, a filtering and voltage dividing circuit may be provided between the full-wave rectifier module 112 and the switching power supply module 113 to improve the stability and accuracy of the output voltage of the full-wave rectifier module 112 .

[0056] The specific implementation structures of the electromagnetic compatibility module 111, the full-wave rectifier module 112, and the switch power supply module 113 can refer to the prior art and will not be expanded here. Through the full-wave rectifier module 112 and the switch power supply module 113 of the power supply module 110, whether the circuit or component in the food processing equipment needs AC or DC, it can be powered, and because the power supply module 110 includes the electromagnetic compatibility module 111, the power supply of the power supply module 110 has higher safety.

[0057] In some embodiments, other types of existing power modules 110 may also be used. The power module 110 may include some or all of the above modules, which are only examples.

[0058] The heating driving circuit 120 is used to heat the food.

[0059] like Figure 2As shown, in an embodiment of the present application, the heating drive circuit 120 includes at least a heating element 121 and a thyristor 122. The heating element 121 is connected to the power module 110. The heating element 121 can be any type of device capable of heating. For example, the heating element 121 can be a heating tube, a heating plate, etc. The thyristor 122 is connected to the heating element 121 and the power module 110. The thyristor 122 is also connected to the controller 150. The thyristor 122 can respond to the control of the controller 150 to enable the heating element 121 to start or stop heating. The heating drive circuit 120 can refer to the prior art and will not be expanded here.

[0060] The heating detection circuit 130 includes a sampling end and an output end. The sampling end is connected between the thyristor 122 and the heating element 121 , and the output end is connected to the controller 150 .

[0061] In this embodiment, the heating detection circuit 130 can be used to detect the voltage between the thyristor 122 and the heating element 121. Figure 2 As shown, the sampling end of the heating detection circuit 130 is connected to the HEAT point between the thyristor TRC1 and the heating element 121 .

[0062] It can be understood that the alternating current has a positive half cycle and a negative half cycle (or called "positive half wave" and "negative half wave"). The thyristor 122 and the heating element 121 both use an alternating current power supply, so the voltage at the HEAT point will show different voltage directions in the positive half cycle and the negative half cycle of the alternating current. Whether the heating element 121 and the thyristor 122 are working will also cause the voltage at this point to change. Therefore, the voltage at the HEAT point and the half cycle of the alternating current can be used to determine the thyristor 122. Similarly, if either the heating element 121 or the thyristor 122 is abnormal, the voltage of the alternating current at the HEAT point will also be abnormal, which can also be used to determine the abnormality of the heating element 121 and the thyristor.

[0063] Therefore, in the embodiment of the present application, the heating detection circuit 130 can perform half-wave rectification on the collected voltage so that the collected voltage shows a difference in the positive half cycle and the negative half cycle of the alternating current.

[0064] In one embodiment, the heating detection circuit 130 may include a diode, a first resistor, and a first capacitor.

[0065] like Figure 2As shown, in the heating detection circuit 130, D3 is a diode, R13 is a first resistor, and X1 is a first capacitor. In this embodiment, the positive electrode of the diode is the sampling end of the heating detection circuit 130, connected between the thyristor 122 and the heating element 121. One end of the first resistor is connected to the cathode of the diode, and the other end of the first resistor is connected to the pin E1 of the controller 150. One end of the first capacitor is connected between the cathode of the diode and the first resistor, and the other end of the first capacitor is grounded.

[0066] The diode has the characteristic of unidirectional conduction, and the current cannot flow from the negative electrode to the positive electrode. In this embodiment, the diode can be used to achieve half-wave rectification. The first resistor R13 is used to limit the current to prevent the signal output to the controller 150 from being too large. The first capacitor X1 is used to filter the voltage after half-wave rectification to reduce interference and improve the accuracy of the voltage value detected by the heating detection circuit 130. Through the heating detection circuit 130, the voltage value after half-wave rectification at the HEAT point can be detected.

[0067] In some embodiments, the heating detection circuit 130 may further include: a second resistor and a third resistor.

[0068] like Figure 2 As shown, the second resistor includes R11 and R12, the third resistor is R14, the first resistor is connected to the cathode of the diode through the second resistor, one end of the third resistor is connected between the first resistor and the second resistor, and the other end of the third resistor is grounded.

[0069] In this embodiment, the second resistor and the third resistor can divide the detected HEAT point voltage to reduce the voltage at the pin of the controller 150, thereby reducing the possibility of the pin being broken down.

[0070] In such Figure 2 In the heating detection circuit 130 shown, the second resistor and the third resistor are used for voltage division, and the voltage at the pin E1 of the controller 150 is affected by the resistance values ​​of the second resistor and the third resistor. The voltage at E1 is also related to the input voltage, that is, the rated voltage of the food processing equipment. If the input voltage is too large, even if the second resistor and the third resistor divide the voltage, it may still cause breakdown.

[0071] Therefore, in one embodiment of the present application, the ratio of the resistance value of the third resistor to the sum of the resistance values ​​of the second resistor and the third resistor can be made less than or equal to a preset ratio to reduce the possibility of the controller 150 pin being broken down and improve the safety of the food processing equipment.

[0072] Among them, the preset ratio is the ratio of the allowable voltage of the controller 150 pin to the maximum value of the rated voltage of the food processing equipment. For example, the breakdown voltage of some controller 150 pins is 5V. To avoid breakdown, the voltage at E1 should be less than 5V. The applicable voltage of the food processing equipment is 170V-265V, and the rated voltage can reach 270V. Since it is AC, the voltage is the square root of twice the rated voltage, that is, 381V, then the preset ratio can be 5 / 381. Exemplarily, the corresponding second resistors R11 and R12 can both be 560KΩ, and the third circuit R14 can be 12KΩ.

[0073] In addition, it can be understood that the pin E1 of the controller 150 is connected to the first resistor R13, and R13 can also play a partial limiting role. Therefore, the ratio of the resistance value of the third resistor to the sum of the resistance values ​​of the second resistor and the third resistor can be equal to the preset ratio.

[0074] In one embodiment, the charging and discharging time of the heating detection circuit 130 is less than a first preset time.

[0075] See also Figure 3 , Figure 3 A voltage waveform diagram provided for an embodiment of the present application. Among them, the sine wave is the voltage waveform of the alternating current, the a waveform is the voltage waveform after half-wave rectification, the b waveform is the voltage waveform when the first capacitor value is at a high value, and the square wave is the voltage waveform when the charge and discharge time is less than the first preset time length.

[0076] like Figure 3 As shown, after half-wave rectification, the collected voltage will present different values ​​in different half cycles of the alternating current. However, since the RC circuit composed of a capacitor and a resistor has a charge-discharge characteristic, if the charge-discharge is stronger, the voltage change may not be obvious, and a relatively gentle curve as shown in waveform b may appear, which cannot reflect the difference between the positive half cycle and the negative half cycle of the alternating current. Therefore, in the present application, the resistance value of the resistor or the capacitance value of the capacitor can be adjusted to control the charge-discharge time to be less than the first preset time, so as to achieve the following. Figure 3 The first preset duration can be set according to the requirements, and the value set for different circuits may be different. The first preset duration is not limited here.

[0077] As in the aforementioned embodiment, if the allowable voltage of the controller 150 pin is 5V, then R11 and R12 are 560KΩ, and R14 is 12KΩ. Accordingly, in one embodiment of the present application, the corresponding first capacitor capacitance can be in the range of 0.1nf to 100nf. For example, the capacitance of X1 is 10nf. Within this capacitance range, the charging and discharging time can be controlled within a shorter time, so that the collected voltage value can reflect the difference in the positive half-cycle and the negative half-cycle of the alternating current.

[0078] The above-mentioned heating detection circuit 130 is only an example and should not be a limitation of the present application. In some other embodiments, the heating detection circuit 130 can also be other circuits that realize half-wave rectification and voltage acquisition, or include other devices on the basis of the above-mentioned heating detection circuit 130, which will not be expanded here. In addition, the above-mentioned heating detection circuit realizes the detection of the heating circuit and the thyristor at the same time, and the circuit is an RC circuit, which is easy to implement. Therefore, compared with the independent thyristor detection circuit or device, the heating detection circuit has the characteristics of low cost and small volume.

[0079] The zero-crossing detection circuit 140 is connected to the power module 110 and is used to detect the voltage value state of the AC power supply.

[0080] In this embodiment, the voltage value state refers to whether the voltage output by the AC power source is in a positive half cycle or a negative half cycle. By way of example, a circuit diagram of a zero-crossing detection circuit 140 is provided herein.

[0081] like Figure 2 As shown, the zero-crossing detection circuit 140 includes: resistors R15, R16, R17, R18, R19, R20, R21, capacitor C1, diode D4, and optocoupler U2. R15 and R16 are connected in series, R19 and R20 are connected in series, and R15, R16 are connected in parallel with R10 and R20 to form a resistor network, the input end of the resistor network is connected to the live wire, and the output end is connected to the positive electrode of the diode D4, one input end of the optocoupler is connected to the negative electrode of the diode D4, the other input end is connected to the live wire, and the output end is connected to the RC circuit, wherein R17 and R21 are both connected to the output end 4 of the optocoupler, and the other end of R17 is connected to the +5V potential, the other end of R21 is connected to R18, and R18 is also connected to the pin ZO of the controller 150, the capacitor C1 is connected between R21 and R18, the other end of C1 is grounded, and the other output end 3 of the optocoupler is grounded.

[0082] In the zero-crossing detection circuit 140, during the positive half-wave, U2 is turned on and ZO is at a low level; during the negative half-wave of the power supply, U2 is turned off and VZO is at a high level. Thus, the controller 150 can identify the zero-crossing point of the alternating current by the level change at ZO, and determine whether the alternating current is in the positive half-cycle or the negative half-cycle.

[0083] The implementation method of the zero-crossing detection circuit 140 can refer to the existing technology, for example, using a chip of the zero-crossing detection circuit 140, or using a voltage divider circuit, a voltage transformer, etc. to implement zero-crossing detection. The above is only an example and should not be construed as a limitation of the present application and will not be explained here.

[0084] The controller 150 is connected to the heating detection circuit 130 and the zero-crossing detection circuit 140, respectively, and is configured to obtain the voltage value detected by the heating detection circuit 130 and the voltage value state detected by the zero-crossing detection circuit 140, and determine the state of the thyristor 122 and / or the heating element 121 according to the voltage value and the voltage value state.

[0085] Among them, the state of the heating element 121 refers to the open circuit of the heating element 121, that is, the heating element 121 is short-circuited due to an abnormality, such as the thermostat tripping, the heating tube failure, etc. The state of the thyristor 122 refers to the conduction and disconnection of the thyristor 122. When it is disconnected, the heating element 121 does not heat, and when it is turned on, the heating element 121 heats. When the controller 150 sends a control signal to control the thyristor 122 to be disconnected, it is detected that the thyristor 122 is still in the on state, then it can be determined that the thyristor 122 may be broken down. On the contrary, when the controller 150 sends a control signal to control the thyristor 122 to be turned on, it is detected that the thyristor 122 is still in the open circuit state, then it can be determined that the thyristor 122 may have a driving abnormality and cannot be turned on. In this way, the state and abnormality of the thyristor 122 and / or the heating element 121 can be determined.

[0086] When it is determined that the thyristor 122 and / or the heating element 121 are abnormal, the food processing equipment should take corresponding measures to reduce the occurrence of safety accidents, such as stopping the operation of the heating element 121 by cutting off the power, discharging the food being heated, and issuing an alarm to prompt.

[0087] In one embodiment, the food processing device may further include a containing structure 210, the containing structure 210 having a containing cavity, and the containing cavity is located in the heating area of ​​the heating element 121. The containing structure 210 is in communication connection with the controller 150, and the containing structure 210 may be controlled by the controller 150. The controller 150 of the video processing device is further configured to control the containing structure 210 to discharge the food in the containing cavity after determining that the thyristor 122 is in an abnormal state.

[0088] like Figure 4 As shown, the containing structure 210 can be a container for various types of food processing equipment to place food to be processed. In this embodiment, the containing cavity of the containing structure 210 is placed in the heating area of ​​the heating element 121, and the heating element 121 can heat the food in the containing cavity.

[0089] Since the abnormality of the heating element 121 is usually a circuit break, which means that the heating is no longer performed, the food remains in the receiving chamber and usually does not cause a safety accident. However, the abnormality of the thyristor 122, especially the breakdown of the thyristor 122, will control the heating element 121 to continue heating, which may cause the food temperature to be too high, especially when the food contains liquid, the liquid may splash, affecting the safety of the user.

[0090] In the embodiment of the present application, when the thyristor 122 is abnormal, the containing structure 210 can be controlled to discharge the food in the containing cavity. Figure 4 In the food processing device shown, the controller 150 can control the second motor 232 of the discharge valve to open the discharge port 231 to discharge the food.

[0091] Under normal circumstances, safety problems are likely to occur only when the heating element 121 heats the food in the accommodating cavity to a certain temperature. Therefore, in some embodiments of the present application, the food processing equipment may also be equipped with a temperature detection module, which may be a device such as a temperature sensor that can detect temperature.

[0092] The temperature detection module is configured to detect the temperature in the receiving chamber. The temperature detection module is also connected to the controller 150. After determining that the thyristor 122 is abnormal, the temperature detection module can send the detected signal representing the temperature to the controller 150. After obtaining the signal representing the temperature, the controller 150 determines whether the signal reaches a preset temperature threshold. If it reaches the preset temperature threshold, the controller 150 controls the receiving structure 210 to discharge the food in the receiving chamber. In this way, the possibility of safety problems caused by excessively high temperature in the receiving chamber is reduced.

[0093] In some embodiments of the present application, the containing structure 210 may include a crushing cup and a discharge valve.

[0094] The crushing cup can refer to the prior art. For example, the crushing cup can be a container of food processing equipment such as a wall breaking machine, a soy milk machine, etc. that needs to crush food. Figure 4 As shown, if the containing structure 210 is a crushing cup, the crushing cup may include a first motor 221 and a crushing knife 222. The first motor 221 may be started under the control of the controller 150 and cause the crushing knife 222 to rotate to crush the food.

[0095] As mentioned above, in the present embodiment, the discharge valve includes a discharge port 231 and a second motor 232 connected to each other, and the second motor 232 is communicatively connected to the controller. The discharge port is connected to the food outlet of the containing structure. After the discharge port is driven to open by the second motor 232, the food can be discharged through the discharge port 231 of the discharge valve. Some food processing equipment processes solid food. If the solid food is large, the discharge port 231 may be blocked. Therefore, in the embodiment of the present application, the first motor 221 can be configured to start in response to the controller 150's instruction to discharge the food, and continue for a preset time to fully crush the food. The controller is also configured to control the second motor to open the discharge port after the preset time to discharge the food in the containing cavity to reduce the situation where the food cannot be discharged.

[0096] For example, when it is determined that the thyristor 122 is abnormal, the problem in the crushing cup can be detected. If the temperature of the food is greater than the preset temperature threshold of 90 degrees and the thyristor 122 has not recovered, the first motor 221 can be started. The first motor 221 rotates the crushing knife 222 to crush the food. After a duration of 30 seconds, the discharge port 231 is controlled to open to discharge the food.

[0097] In some embodiments of the present application, the food processing device may further include a brushless DC motor.

[0098] In this embodiment, the brushless DC motor can be the second motor of the grinding cup in the above-mentioned embodiment, the first motor of the discharge valve, or other motors in the food processing equipment. The power supply of the brushless DC motor is usually a DC power supply. In the food processing equipment provided in the embodiment of the present application, the brushless DC motor module can be connected to the switching power supply module 113.

[0099] In this embodiment, the heating detection circuit can be connected to the brushless DC motor to determine whether there is an abnormality in the brushless DC motor based on the heating detection circuit, the zero-crossing detection circuit and the controller. The detection method can refer to the above-mentioned embodiment and will not be repeated here.

[0100] At present, the detection circuit of a brushless DC motor can usually only detect abnormalities of the brushless DC motor through a DC signal. However, through the heating detection circuit, zero-crossing detection circuit and controller in the food processing equipment of the embodiment of the present application, the brushless DC motor can be detected in combination with alternating current, thereby improving the accuracy of detection and thereby improving the reliability and safety of the food processing equipment.

[0101] Based on the same inventive concept, the embodiment of the present application further provides a heating control method, which can be applied to the controller 150 in the video processing device provided in any of the above embodiments. Figure 5 , Figure 5 This is a flow chart of a heating control method provided in an embodiment of the present application. The heating control method includes:

[0102] S110 , obtaining a voltage value through the heating detection circuit 130 .

[0103] S120, obtaining a voltage value state corresponding to the voltage value through a zero-crossing detection circuit.

[0104] S130, determining the state of the heating element and / or the thyristor according to the voltage value, the voltage value state and a preset state relationship.

[0105] Next, the heating control method provided in the embodiment of the present application will be described.

[0106] For S110, the voltage value is obtained through the heating detection circuit 130. The principle of obtaining the voltage value through the heating detection circuit 130 can refer to the above embodiment, and will not be repeated here.

[0107] In one embodiment, obtaining voltage through the heating detection circuit 130 may include: obtaining multiple sampled voltage values ​​through the heating detection circuit 130 based on a preset sampling frequency within the same half cycle of the voltage within a second preset time period; and determining the average value of the multiple sampled voltage values ​​as the voltage value.

[0108] In this embodiment, the second preset duration is less than the duration of one and a half cycles of the voltage. For example, the half-wave period of the alternating current is T, then the second preset duration is less than the duration of the half-wave period, then the second preset duration can be 0.2T, 0.3T, 0.4T, 0.5T, 0.6T, 0.7T, 0.8T, etc. Exemplarily, the frequency of the mains AC power is 50Hz, and each half-wave period is 10ms, then the second preset duration can be 6ms. The preset frequency can be set according to the sampling quantity requirement, for example, sampling once every 50us, sampling once every 100us, sampling once every 200us, etc., the above is only an example and should not be referred to as a limitation of the present application. When sampling, the voltage within the same half cycle should be sampled, then the heating detection circuit 130 can be controlled to sample after the zero-crossing detection circuit 140 detects that the AC power is zero-crossing.

[0109] After sampling to obtain multiple sampled voltage values, the average value of the multiple sampled voltage values ​​can be calculated as the required voltage value. In some embodiments, the sampled voltage values ​​can also be processed, for example, the average value is calculated after removing the extreme values, which will not be expanded here.

[0110] It can be understood that the sampled signal may be subject to interference, such as zero-crossing interference, which may make a single sampled voltage value inaccurate. Therefore, multiple sampled voltage values ​​can be sampled at a preset frequency and the average value can be calculated to reduce the impact of a single data on the accuracy of voltage value detection, improve the accuracy of the voltage value, and thus improve the accuracy of heating control.

[0111] For S120, the voltage value state corresponding to the voltage value is obtained through the zero-crossing detection circuit. In this embodiment, the principle and acquisition method of S120 can refer to the above embodiments or prior art, and will not be repeated here.

[0112] S130, determining the state of the heating element 121 and / or the thyristor 122 according to the voltage value, the voltage value state and the preset state relationship.

[0113] In one embodiment, determining the heating element 121 according to the voltage value, the voltage value state and the preset state relationship may include: determining two different half cycles based on the voltage value state; if the voltage values ​​of the two different half cycles are the same, then determining the state of the heating element 121 based on the voltage values ​​corresponding to the two different half cycles and the preset state relationship.

[0114] In an embodiment of the present application, the heating detection circuit 130 performs half-wave rectification on the voltage so that the voltage value differs in the positive half-cycle and the negative half-cycle. Accordingly, when judging the state of the thyristor 122 and / or the heating element 121, at least a voltage value corresponding to a positive half-cycle and a voltage value corresponding to a negative half-cycle need to be obtained, that is, the two different half-cycles include a positive half-cycle and a negative half-cycle.

[0115] In this embodiment, the abnormality of the heating element 121 is usually a short circuit. When the circuit is short, a loop cannot be formed between the thyristor 122, the heating tube and the AC power supply, and there is no voltage between the thyristor 122 and the heating tube. Regardless of the positive half cycle or the negative half cycle of the AC power, the heating detection circuit 130 cannot detect the voltage or the detected voltage value is 0, that is, the voltage values ​​corresponding to the two different half cycles are the same. The state of the heating element 121 can be determined in combination with the preset state relationship.

[0116] In one embodiment, determining the state of the thyristor 122 according to the voltage value, the voltage value state and the preset state relationship may include: determining two different half cycles based on the voltage value state; if the voltage values ​​of the two different half cycles are different, determining the state of the thyristor 122 based on the voltage values ​​corresponding to the two different half cycles and the preset state relationship.

[0117] In this embodiment, the state of the thyristor 122 may include on and off. When the thyristor 122 is on or off, the alternating current can be normally conducted, and the voltage value obtained by the heating detection circuit 130 will be different in the positive half cycle and the negative half cycle of the alternating current. Therefore, the voltage values ​​corresponding to the two different half cycles and the preset state relationship can be obtained to determine the state of the thyristor 122.

[0118] In the above embodiment, the method of determining the state of the thyristor 122 and the method of determining the state of the heating element 121 can be used separately or in combination, which is not limited here.

[0119] In one embodiment, the preset state relationship includes: if the voltage value is always 0 in the negative half cycle and the positive half cycle, it is determined that the heating element 121 is disconnected.

[0120] by Figure 2 For example, as mentioned above, when the heating element 121 is disconnected, no matter the positive or negative half cycle of the alternating current, there is no voltage at the HEAT point, and the voltage collected at E1 is 0. Therefore, if the voltage value is always 0, it can be determined that the heating element 121 is disconnected.

[0121] In one embodiment, the preset state relationship may further include: if the voltage value state is a negative half cycle and the voltage value is greater than zero, or the voltage value state is a positive half cycle and the voltage value is 0, then it is determined that the thyristor 122 is disconnected.

[0122] by Figure 2 For example, when the thyristor 122 is disconnected, in the negative half cycle of the alternating current, the voltage will flow back from the neutral line to the live line. At this time, the voltage can pass through the diode, and the voltage value is greater than 0. Conversely, in the positive half cycle of the alternating current, the voltage cannot pass through the diode, and the voltage value is 0. In this way, it is possible to determine whether the thyristor 122 is disconnected.

[0123] In one embodiment, the preset state relationship may further include: if the voltage value state is in the positive half cycle and the voltage value is greater than positive, or the voltage value state is in the negative half cycle and the voltage value is 0, then it is determined that the thyristor 122 is turned on.

[0124] by Figure 2 For example, when the thyristor 122 is turned on, in the positive half cycle of the alternating current, the voltage will flow from the live wire back to the neutral wire. At this time, the voltage can pass through the diode, and the voltage value is greater than 0. Conversely, in the negative half cycle of the alternating current, the voltage cannot pass through the diode, and the voltage value is 0. In this way, it is possible to determine whether the thyristor 122 is disconnected.

[0125] The preset state relationship may include all of those provided in the above embodiments, or may be a combination of any conditions.

[0126] In the above embodiment, the thyristor 122 is determined to be in the on and off state, and it may still be able to work normally. Therefore, when judging whether the thyristor 122 is abnormal, it is also necessary to combine the control signal (or "drive signal") of the thyristor 122. The control signal of the thyristor 122 is used to control the thyristor 122 to be on or off. If the control signal indicates that the thyristor 122 is controlled to be on, and it is determined that the thyristor 122 is still in the off state, it can be determined that the thyristor 122 is in an abnormal state of being broken, wherein the breaking of the thyristor 122 means that the thyristor 122 is not controlled by the controller 150 or cannot control the heating element 121 to heat. Similarly, if the control signal indicates that the thyristor 122 is controlled to be off, and it is determined that the thyristor 122 is still in the on state, it can be determined that the thyristor 122 is in an abnormal state of being broken, and the heating element 121 cannot be controlled to stop heating.

[0127] In one embodiment, after determining the status of the heating element 121 and / or the thyristor 122, it is also possible to detect whether there are abnormalities in multiple consecutive cycles of the alternating current; for each cycle: based on the control signal, voltage value status, and voltage value of the thyristor 122 in each half-wave in the cycle, determine whether the thyristor 122 and / or the heating element 121 are abnormal in each half-wave in the cycle; if the thyristor 122 and / or the heating element 121 are abnormal, the abnormal value is accumulated; when the abnormal value is greater than a second preset threshold value, the cycle is confirmed to be abnormal.

[0128] In this embodiment, the cycle can be set as required, for example, 10 AC half-waves, 15 AC half-waves, 20 AC half-waves, etc. Using multiple half-waves as a cycle reduces the possibility of single detection errors and the possibility of still being judged as abnormal after the thyristor 122 and the heating element 121 return to normal.

[0129] In this embodiment, the state of the thyristor 122 and / or the heating element 121 can be determined by using the voltage state and the voltage value, and then the abnormality is determined in combination with the control signal. The specific process can refer to the above embodiment and will not be repeated here. In some embodiments, the abnormality can also be determined directly based on the voltage state, the voltage value and the control signal.

[0130] by Figure 2 For example, when the voltage value state is in the positive half cycle, if the control signal indicates that the thyristor 122 is turned on, if the voltage value is zero at this time, there may be an abnormality that the thyristor 122 is broken; if the control signal indicates that the thyristor 122 is turned off, if the voltage value is greater than zero at this time, there may be an abnormality that the thyristor 122 is broken. Similarly, when the voltage value state is in the negative half cycle, if the control signal indicates that the thyristor 122 is turned on, if the voltage value is zero at this time, there may be an abnormality that the thyristor 122 is broken; if the control signal indicates that the thyristor 122 is turned off, if the voltage value is zero at this time, there may be an abnormality that the heating element 121 is turned off.

[0131] When determining an abnormality, the abnormal value can be accumulated. The same cycle includes multiple half-waves, and different half-waves are detected separately to see whether there is an abnormality. If there is an abnormality, the abnormal value is accumulated. When the abnormal value is greater than the second preset threshold, it is determined that an abnormality exists in the cycle.

[0132] In order to reduce the inaccuracy of abnormal judgment caused by insufficient data, multiple consecutive cycles can be detected to determine whether each cycle is abnormal. If multiple consecutive cycles are abnormal, an alarm signal will be issued.

[0133] The number of abnormal cycles required to issue an alarm signal can be set according to demand, for example, 5 consecutive cycles, 10 cycles, 15 cycles, etc. The alarm signal can be a prompt sound from a buzzer, a flashing prompt light, etc., and the method of the alarm signal is not limited here. By issuing an alarm signal, the user can be informed of the abnormality in time, reducing the safety problems caused by the user continuing to use the food processing equipment in an abnormal state.

[0134] In the above embodiment, for different abnormalities, the abnormal times corresponding to the different abnormalities can be accumulated respectively, thereby determining the abnormality and abnormality type of the heating element 121 and / or the thyristor 122 according to the size of the abnormal value.

[0135] In an embodiment of the present application, the heating detection circuit 130 is arranged between the thyristor 122 and the heating element 121, and the voltage value between the thyristor 122 and the heating element 121 can be collected, and the voltage value can be used to determine the state of the thyristor and the heating element 121 at the same time. The heating detection circuit 130 detects the voltage value after half-wave rectification, and the voltage value of the alternating current will be different in the positive half cycle and the negative half cycle. When the heating element 121 and the thyristor are in different states, the voltage values ​​of the two in different half cycles of the alternating current are different. Therefore, the controller 150 can use the voltage value detected by the heating detection circuit 130 and the voltage value state detected by the zero-crossing detection circuit to realize the detection of the state of the thyristor and / or the heating element 121. Compared with the method of only detecting the heating element 121, detecting the state of the thyristor can make the food processing equipment further controlled according to the state of the thyristor, reduce the occurrence of abnormal heating caused by abnormal thyristor, and improve the safety of the food processing equipment.

[0136] In the embodiments provided in the present application, it should be understood that the disclosed methods and devices can also be implemented in other ways. The device embodiments described above are merely illustrative. The functional modules in the various embodiments of the present application can be integrated together to form an independent part, or each module can exist separately, or two or more modules can be integrated to form an independent part.

[0137] The above embodiments can be freely combined without conflict, and the embodiments obtained by the combination are included in the protection scope of this application.

[0138] The above detailed description of the embodiments of the present application provided in the accompanying drawings is not intended to limit the scope of the present application for which protection is sought, but merely represents selected embodiments of the present application. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in the field without creative work are within the scope of protection of the present application.

[0139] It should be noted that similar reference numerals and letters denote similar items in the following drawings, and therefore, once an item is defined in one drawing, further definition and explanation thereof is not required in subsequent drawings.

[0140] In the description of this application, it is also necessary to explain that, unless otherwise clearly specified and limited, the term "connection" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be an electrical connection; it can be a direct connection, or it can be an indirect connection through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in this application can be understood according to specific circumstances.

[0141] The above description is only an embodiment of the present application and is not intended to limit the protection scope of the present application. For those skilled in the art, the present application may have various modifications and variations. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present application shall be included in the protection scope of the present application.

Claims

1. A food processing equipment, characterized in that: include: A power module, used to access an AC power source; A heating element connected to the power module; A thyristor connected to the heating element and the power module; A heating detection circuit, wherein a sampling end of the heating detection circuit is connected between the thyristor and the heating element; the heating detection circuit is configured to detect a voltage value after half-wave rectification between the thyristor and the heating element; A zero-crossing detection circuit connected to the power module; the zero-crossing detection circuit is configured to determine a voltage value state of the AC power supply; the voltage value state includes whether the voltage of the AC power supply is in a positive half cycle or a negative half cycle; A controller, connected to the output end of the heating detection circuit and the zero-crossing detection circuit respectively; The controller is configured to determine the state of the heating element and / or the thyristor according to the voltage value, the current state and a preset state relationship, wherein the preset state relationship includes the corresponding relationship between the voltage value, the voltage value state and the state of the heating tube and / or the thyristor.

2. The food processing equipment according to claim 1, characterized in that The heating detection circuit comprises: a diode, a first resistor, and a first capacitor; The anode of the diode is the sampling end of the heating detection circuit; One end of the first resistor is connected to the cathode of the diode, and the other end of the first resistor is connected to the controller; One end of the first capacitor is connected between the cathode of the diode and the first resistor, and the other end of the first capacitor is grounded.

3. The food processing equipment according to claim 2, characterized in that: The heating detection circuit further includes: a second resistor and a third resistor; The first resistor is connected to the cathode of the diode through the second resistor; One end of the third resistor is connected between the first resistor and the second resistor, and the other end of the third resistor is grounded; The ratio of the resistance value of the third resistor to the sum of the resistance values ​​of the second resistor and the third resistor is less than or equal to a preset ratio; the preset ratio is the ratio of the allowable voltage of the controller pin to the maximum rated voltage of the food processing equipment.

4. The food processing equipment according to claim 3, characterized in that The charging and discharging time of the heating detection circuit is less than a first preset time.

5. The food processing equipment according to any one of claims 1 to 4, characterized in that: Also includes: A containing structure having a containing cavity for containing food; the containing cavity is located in a heating area of ​​the heating element; The containing structure is communicatively connected with the controller; The controller is further configured to control the containing structure to discharge the food in the containing cavity when it is determined that the thyristor is abnormal.

6. A heating control method, characterized in that: A controller used in a food processing device according to any one of claims 1 to 5, wherein the heating control method comprises: Acquiring a voltage value through the heating detection circuit; The voltage value state corresponding to the voltage value is obtained by the zero-crossing detection circuit; the voltage value state includes whether the voltage of the AC power supply is in a positive half cycle or a negative half cycle; The state of the heating element and / or the thyristor is determined according to the voltage value, the voltage value state and a preset state relationship, wherein the preset state relationship includes a corresponding relationship between the voltage value, the voltage value state and the state of the heating element and / or the thyristor.

7. The heating control method according to claim 6, characterized in that: The determining the state of the heating element and / or the thyristor according to the voltage value, the voltage value state and the preset state relationship comprises: Determine two different half cycles based on the voltage value state; the two different half cycles include a positive half cycle and a negative half cycle; If the voltage values ​​of the two different half cycles are the same, determining the state of the heating element based on the voltage values ​​corresponding to the two different half cycles and a preset state relationship; If the voltage values ​​of the two different half cycles are different, the state of the thyristor is determined based on the voltage values ​​corresponding to the two different half cycles and a preset state relationship.

8. The heating control method according to claim 7, characterized in that: The preset state relationship includes: If the voltage value state is that the voltage value is always 0 during the negative half cycle and the positive half cycle, it is determined that the heating element is disconnected; If the voltage value state is a negative half cycle and the voltage value is greater than zero, or the voltage value state is a positive half cycle and the voltage value is 0, it is determined that the thyristor is disconnected; If the voltage value state is in the positive half cycle and the voltage value is greater than positive, or the voltage value state is in the negative half cycle and the voltage value is 0, it is determined that the thyristor is turned on.

9. The heating control method according to claim 6, characterized in that: The step of obtaining a voltage through the heating detection circuit comprises: In the same half cycle of the voltage, a plurality of sampled voltage values ​​are obtained through the heating detection circuit based on a preset sampling frequency within a second preset time length; the second preset time length is less than the time length of one and a half cycles of the voltage; An average value of a plurality of the sampled voltage values ​​is determined as the voltage value.

10. The heating control method according to claim 6, characterized in that: After determining the state of the heating element and / or the thyristor according to the voltage value, the voltage value state and the preset state relationship, the method further includes: Detect whether there are abnormalities in multiple consecutive cycles of the alternating current; wherein each cycle includes multiple half-waves; for each cycle: based on the control signal of the thyristor under each half-wave in the cycle, the voltage value state, and the voltage value, determine whether the thyristor and / or the heating element are abnormal under each half-wave in the cycle; if the thyristor and / or the heating element are abnormal, accumulate the abnormal value; the control signal is used to control the thyristor to be turned on or off; when the abnormal value is greater than a second preset threshold value, confirm that the cycle is abnormal; If multiple consecutive cycles are abnormal, an alarm signal is issued.

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