CN213919468U - Heating controller and heating device - Google Patents

Abstract

The application discloses heating controller and heating device, the device includes: the device comprises a frequency converter, a control circuit and a heating circuit; the frequency converter receives a first power supply signal, processes the first power supply signal and generates a power supply signal, wherein the power supply signal comprises a first power supply signal and a second power supply signal; the control circuit generates a first heating signal and a second heating signal; the heating circuit comprises a first heating circuit and a second heating circuit, the first heating circuit is connected with the frequency converter, receives a first power supply signal, a second power supply signal and a first heating signal, and heats the external equipment when the amplitude of the first heating signal meets a first preset condition; the second heating circuit is connected with the frequency converter, receives a second power signal, a second power supply signal and a second heating signal, and heats the external equipment when the amplitude of the second heating signal meets a second preset condition. Through the mode, safe and efficient heating and cost reduction can be achieved.

Description

Heating controller and heating device

Technical Field

The application relates to the technical field of integrated circuits, in particular to a heating controller and a heating device.

Background

At present, a heating device applied to equipment such as an injection molding machine or an extruder generally adopts a contactor or a solid-state relay to control heating, but when the conditions such as overload, overcurrent or short circuit occur, the problem that a circuit cannot be protected in time exists, so that devices in the heating equipment are easy to damage, the replacement cost of the devices is high, the heating is slow, the heating time is long, and the operation efficiency is low.

SUMMERY OF THE UTILITY MODEL

The application provides a heating controller and heating device, can realize safe efficient heating and reduce cost.

In order to solve the above technical problem, the present application adopts a technical scheme that a heating controller is provided, where the heating controller includes a frequency converter, a control circuit, and a heating circuit, and the frequency converter is configured to receive a first power supply signal, process the first power supply signal, and generate a power supply signal; the power supply signals comprise a first power supply signal and a second power supply signal; the control circuit is used for generating a first heating signal and a second heating signal; the heating circuit comprises a first heating circuit and a second heating circuit, the first heating circuit is connected with the frequency converter and is used for receiving a first power supply signal, a second power supply signal and a first heating signal and heating external equipment when the amplitude of the first heating signal meets a first preset condition, wherein the first power supply signal and the second power supply signal are used for supplying power to the first heating circuit; the second heating circuit is connected with the frequency converter and used for receiving a second power supply signal, a second power supply signal and a second heating signal and heating external equipment when the amplitude of the second heating signal meets a second preset condition, wherein the second power supply signal and the second power supply signal are used for supplying power to the second heating circuit.

In order to solve the above technical problem, another technical solution adopted in the present application is to provide a heating device, where the heating device includes a heating controller and a charging barrel, and the heating controller is used for heating the charging barrel, where the heating controller in the heating device is the heating controller in the above technical solution, and is not described herein again.

Through the scheme, the beneficial effects of the application are that: the heating controller comprises a frequency converter, a control circuit and a heating circuit, wherein the frequency converter can process a received first power supply signal to generate a first power supply signal and a second power supply signal, and respectively provide the first power supply signal and the second power supply signal to the first heating circuit and the second heating circuit, the first power supply signal and the second power supply signal can be used for supplying power to the first heating circuit, and the second power supply signal can be used for supplying power to the second heating circuit; the control circuit can generate a first heating signal and a second heating signal and respectively input the first heating signal and the second heating signal to the first heating circuit and the second heating circuit; when the amplitude of the first heating signal meets a first preset condition, the first heating circuit enters a working state to heat external equipment; when the amplitude of the second heating signal meets a second preset condition, the second heating circuit enters a working state to heat the external equipment. Because whether first heating circuit heats with the second heating circuit is controlled by control circuit, can in time control stop heating when situations such as overflowing, transshipping or short circuit appear, protection heating circuit does not receive the damage for the heating process is safer, and adopts first heating circuit and second heating circuit to heat, and this kind of mode can make the heating more high-efficient, helps promoting heating efficiency, shortens the heat time.

Drawings

In order to more clearly illustrate the technical solutions in the embodiments of the present application, the drawings needed to be used in the description of the embodiments are briefly introduced below, and it is obvious that the drawings in the following description are only some embodiments of the present application, and it is obvious for those skilled in the art to obtain other drawings based on these drawings without creative efforts. Wherein:

FIG. 1 is a schematic diagram of an embodiment of a heating controller provided herein;

FIG. 2 is a schematic structural diagram of another embodiment of a heating controller provided herein;

FIG. 3 is a schematic connection diagram of the first heating circuit, frequency converter and control circuit provided in FIG. 2;

FIG. 4 is a schematic connection diagram of the first heating element circuit, frequency converter and control circuit provided in FIG. 3;

FIG. 5 is a schematic connection diagram of the second heating circuit, frequency converter and control circuit provided in FIG. 2;

FIG. 6 is a schematic connection diagram of the second heating element circuit, frequency converter and control circuit provided in FIG. 5;

FIG. 7 is a schematic diagram of the filter circuit in connection with the first heating element circuit and the second heating element circuit provided herein;

fig. 8 is a schematic structural diagram of an embodiment of a heating device provided in the present application.

Detailed Description

The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application, and it is obvious that the described embodiments are only a part of the embodiments of the present application, and not all the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present application.

Referring to fig. 1, fig. 1 is a schematic structural diagram of an embodiment of a heating controller provided in the present application, the heating controller including: an inverter 11, a control circuit 12, and a heating circuit 13.

The frequency converter 11 is configured to receive the first power supply signal VDD1, process the first power supply signal VDD1, and output a power supply signal to the heating circuit 13; in particular, the power supply signal may be a direct current signal comprising a first power supply signal DC + and a second power supply signal DC-.

The control circuit 12 is configured to output a first heating signal and a second heating signal to the heating circuit 13, and specifically, the control circuit 12 may generate corresponding heating signals (including the first heating signal and the second heating signal) after receiving signals sent by other devices or control instructions issued by a user, and control the heating circuit 13 by adjusting the amplitude of the heating signals output by the control circuit 12.

The heating circuit 13 is connected to the frequency converter 11 and the control circuit 12, and is configured to receive the second power supply signal VDD2, the power supply signal output by the frequency converter 11, and the heating signal output by the control circuit 12; specifically, the second power supply signal VDD2 and the power supply signal may power the heating circuit 13 to be in an operating state, and whether the heating circuit 13 heats the external device is controlled by the heating signal.

In a specific embodiment, the heating circuit 13 includes a first heating circuit 131 and a second heating circuit 132, the first heating circuit 131 is connected to the frequency converter 11 and the control circuit 12, and is configured to receive the first power signal DC +, the first heating signal and the second power signal VDD2, and heat the external device when the amplitude of the first heating signal satisfies a first preset condition; specifically, the first power signal DC + and the second power signal VDD2 are used to power the first heating circuit 131, and the first heating signal is used to control whether the first heating circuit 131 heats the external device.

Further, the first preset condition may be that the amplitude of the first heating signal is in a range of 3.5V to 5V, and when the amplitude of the first heating signal output to the first heating circuit 131 by the control circuit 12 satisfies the condition, the first heating circuit 131 heats the external device. If the amplitude of the first heating signal is 2V, the first preset condition is not satisfied, and at this time, the first heating circuit 131 stops heating the external device; if the amplitude of the first heating signal is 4V, the amplitude of the first heating signal at this time satisfies the first preset condition, so that the first heating circuit 131 heats the external device. It is understood that the first preset condition may be set according to specific application requirements, for example, the first preset condition may also be set to set the amplitude range of the first heating signal to be 2.5V to 5V.

The second heating circuit 132 is connected to the frequency converter 11 and the control circuit 12, and is configured to receive a second power signal DC-, a second heating signal, and a second power supply signal VDD2, and heat the external device when the amplitude of the second heating signal satisfies a second preset condition; in particular, the second power supply signal DC-and the second supply signal VDD2 are used to power the second heating circuit 132, and the second heating signal is used to control the heating of the second heating circuit 132. It is understood that the second preset condition may be set in a manner similar to the first preset condition, and is not described herein again.

In a specific embodiment, the first power supply signal VDD1 received by the frequency converter 11 and the second power supply signal VDD2 received by the heating circuit 13 may be power supply signals of an electrical network (not shown in the drawings), specifically, the power supply signals of the electrical network are transmitted by four incoming lines RSTN, the RSTN respectively represent three phase incoming lines R, T, S and one neutral incoming line N, the first power supply signal VDD1 received by the frequency converter 11 may be a power supply signal received by being connected with three phase lines RST, and the second power supply signal VDD2 received by the heating circuit 13 may be a power supply signal received by being connected with the neutral line N.

Further, the frequency converter 11 processes the first power supply signal VDD1 received from the power grid, generates a first power supply signal DC + to the first heating circuit 131, and outputs a second power supply signal DC-to the first heating circuit 131, specifically, the first power supply signal DC + may be positive direct current, and the second power supply signal DC-may be negative direct current.

The heating controller in this embodiment includes a frequency converter, a control circuit, and a heating circuit, where the frequency converter may process a received first power supply signal to generate a first power signal and a second power signal, and provide the first power signal and the second power signal to the first heating circuit and the second heating circuit, respectively, and supply power to the first heating circuit by using the first power signal and the second power signal, and supply power to the second heating circuit by using the second power signal and the second power signal; meanwhile, the control circuit can output a first heating signal and a second heating signal to the heating circuit and respectively control the first heating circuit and the second heating circuit to heat, so that the first heating circuit can heat the external equipment when the amplitude of the first heating signal meets a first preset condition, and the second heating circuit can heat the external equipment when the amplitude of the second heating signal meets a second preset condition; the first heating circuit and the second heating circuit are used for heating, so that the heating is more efficient, the heating efficiency is improved, and the heating time is shortened; in addition, the control circuit can control the heating circuit to stop heating in time when conditions such as overcurrent, overload or short circuit occur, the heating circuit is protected from being damaged, and the heating process of the heating circuit is safer.

Referring to fig. 2, fig. 2 is a schematic structural diagram of another embodiment of a heating controller provided in the present application, the heating controller including: an inverter 11, a control circuit 12, and a heating circuit 13.

The control circuit 12 is connected to the frequency converter 11 and the heating circuit 13, and is configured to output a first control signal to the frequency converter 11, to control the frequency converter 11, output a first heating signal and a second heating signal to the heating circuit 13, and control the heating circuit 13 to heat.

The frequency converter 11 is connected to the heating circuit 13 and the control circuit 12, and is configured to receive the first power supply signal VDD1, process the first power supply signal VDD1, and generate a power supply signal to the heating circuit 13, where the power supply signal includes a first power supply signal DC + and a second power supply signal DC-.

In a specific embodiment, the frequency converter 11 includes a rectifying circuit 111 and a buffer filter circuit 112.

The rectifying circuit 111 is configured to receive the first power supply signal VDD1, perform rectification processing on the received first power supply signal VDD1, and output a rectified signal; specifically, the first power supply signal VDD1 may be an ac signal, the rectifying circuit 111 performs a rectifying process on the ac signal to output a dc rectified signal, and the rectifying circuit 111 may be a three-phase rectifying bridge.

The buffer filter circuit 112 is connected to the rectifying circuit 111 and the heating circuit 13, and is configured to receive the direct current rectified signal output by the rectifying circuit 111, perform buffer filtering processing on the rectified signal, and output a first power signal DC + and a second power signal DC-to the heating circuit 13. Further, the buffer filter circuit 112 may buffer and filter the rectified signal, so as to smoothly output the power signal with a smooth waveform, the buffer filter circuit 112 may include a relay, a capacitor, a diode, or a resistor, and the like, the control circuit 12 is used to control the on or off of the relay, and the matching of the relay, the capacitor, the diode, and the resistor is used to realize the suppression of the current/voltage rising rate of the device, thereby playing a role of protecting the circuit; in addition, the ac signal can be filtered by using the characteristic of the capacitor passing ac resistance dc, so as to ensure that the signal input to the heating circuit 13 is a dc signal.

The heating circuit 13 includes a first heating circuit 131 and a second heating circuit 132, the first heating circuit 131 is connected to the buffer filter circuit 112 and the control circuit 12, and is configured to receive the first power signal DC +, the second power signal VDD2 and the first heating signal, and heat the external device when the amplitude of the first heating signal satisfies a first preset condition. The second heating circuit 132 is connected to the buffer filter circuit 112 and the control circuit 12, and is configured to receive the second power signal DC-, the second power signal VDD2 and the second heating signal, and heat the external device when the amplitude of the second heating signal satisfies a second preset condition.

Specifically, the amplitude ranges defined by the first preset condition and the second preset condition may be set according to the amplitude of the power signals received by the first heating circuit 131 and the second heating circuit 132, and the left threshold of the amplitude range is usually not lower than one-half of the amplitude of the power signals.

The control circuit 12 outputs a first heating signal to the first heating circuit 131 and outputs a second heating signal to the second heating circuit 132, and the first heating signal and the second heating signal output by the control circuit 12 can respectively control the first heating circuit 131 and the second heating circuit 132; specifically, the control circuit 12 may control the first heating circuit 131 and the second heating circuit 132 by controlling the amplitude of the heating signal.

Further, the amplitude of the first heating signal and the amplitude of the second heating signal may be the same or different, for example, both the amplitude of the first heating signal and the amplitude of the second heating signal may be 3V, and the control circuit 12 may also output the first heating signal with the amplitude of 3V and the second heating signal with the amplitude of 2V, so as to realize that the first heating circuit 131 is controlled by the first heating signal, and the second heating circuit 132 is controlled by the second heating signal, thereby realizing independent control without mutual influence.

In a specific embodiment, the first heating circuit 131 is connected to the frequency converter 11 and the control circuit 12, as shown in fig. 3, the first heating circuit 131 includes at least one first heating unit circuit 21, and the first heating unit circuit 21 includes a first heating control circuit 211 and a first heating device 212. Specifically, the first heating circuit 131 may include one first heating unit circuit 21, and may also include two or more first heating unit circuits 21, for example, two first heating unit circuits 21 are illustrated in fig. 3.

The first heating control circuit 211 is connected to the frequency converter 11 and the control circuit 12, and is configured to be turned on when the amplitude of the received first heating signal satisfies a first preset condition. The first heating device 212 is connected to the first heating control circuit 211, and heats an external device when the first heating control circuit 211 is turned on.

In a specific embodiment, the connection between the first heating unit circuit 21 and the frequency converter 11 and the control circuit 12 is shown in fig. 4, and the first heating control circuit 211 includes: a first switching tube IGBT1, a first diode D1, a second diode D2, a first current detection circuit 2111, and a first switching circuit 2112.

The first end of the first switching tube IGBT1 is connected to the frequency converter 11, and is configured to receive the first power signal DC +, the second end of the first switching tube IGBT1 is connected to the control circuit 12, and is configured to receive the first heating signal, when the amplitude of the first heating signal satisfies the first preset condition, the first switching tube IGBT1 is turned on, and the third end of the first switching tube IGBT1 is connected to the other end of the first diode D1.

One end of the first diode D1 is connected to the first end of the first switch tube IGBT1, and the other end of the first diode D1 is connected to the third end of the first switch tube IGBT 1.

One end of the second diode D2 is connected to the third end of the first switch IGBT1, and the other end of the second diode D2 is configured to receive the second power supply signal VDD 2.

Specifically, a first end of the first switching tube IGBT1 is a drain, a second end of the first switching tube IGBT1 is a gate, and a third end of the first switching tube IGBT1 is a source; one end of the first diode D1 is a cathode, and the other end of the first diode D1 is an anode; one end of the second diode D2 is a cathode, and the other end of the second diode D2 is an anode.

One end of the first heating device 212 is connected to the third end of the first switching transistor IGBT1, and the other end of the first heating device 212 is connected to the other end of the second diode D2. Further, the first heating device 212 may be a heating coil, and when the first switching tube IGBT1 is turned on, the first power signal DC + is applied to the heating coil, so that the heating coil generates heat, thereby heating the external device.

With continued reference to fig. 4, the first heating control circuit 211 further includes a first current detection circuit 2111 and a first switch circuit 2112.

The first current detection circuit 2111 is connected to one end of the first heating device 212 and the third end of the first switching tube IGBT1, and is configured to detect a magnitude of the first current signal input to the first heating device 212, and feed back the first current signal to the control circuit 12, so that the control circuit 12 controls the first switching tube IGBT1 to turn off when the magnitude of the first current signal is greater than a first preset current threshold.

Specifically, the first current signal is a current flowing into the first heating device 212 when the first switching tube IGBT1 is turned on, so that the first heating device 212 generates heat. The first current detection circuit 2111 can detect the amplitude of the first current signal when the first switching tube IGBT1 is turned on, and when the amplitude of the first current signal is too large, that is, the amplitude of the first current signal is greater than a first preset current threshold, the control circuit 12 obtains information that the current is too large, and can output a signal to the first switching tube IGBT1 and turn off the first switching tube IGBT1, so as to protect the devices of the first heating unit circuit 21 from being damaged. It is understood that the value of the first predetermined current threshold may be set according to the maximum current threshold that can be endured by the device in the first heating unit circuit 21.

Further, the first current detection circuit 2111 may feed back the amplitude of the first current signal to the control circuit 12, and the control circuit 12 determines the amplitude of the first current signal when receiving the feedback information, and when determining that the amplitude of the first current signal is too large, sends a cut-off signal to the first switching tube IGBT1, and controls the first switching tube IGBT1 to be in a cut-off state, so as to protect the first heating unit circuit 21 during overcurrent.

The first switching circuit 2112 is connected to the first heating device 212 and the first current detection circuit 2111, and is configured to close the path between the first switching tube IGBT1 and the first heating device 212 after detecting that the amplitude of the signal input to the first heating device 212 exceeds a first preset amplitude range. Specifically, the first preset amplitude range may be a voltage range or a current range, and the value setting of the first preset amplitude range may be selected according to the specific application requirement.

The first switching circuit 2112 may be, in particular, an air switch which, when the amplitude of the signal input to the first heating means 212 is outside a first preset amplitude range, i.e., overcurrent, overvoltage, or short circuit, the air switch may be automatically turned off, thereby achieving the function of protecting the first heating unit circuit 21, and when other devices in the first heating unit circuit 21 are damaged, the path between the first switching tube IGBT1 and the first heating device 212 may be opened by an air switch when the device is repaired or replaced, thereby ensuring the safety of the maintenance process, and the respective first heating unit circuits 21 in the first heating circuits 131 are independent from each other, the commissioning of a single damaged first heating unit circuit 21 can be achieved without affecting the other first heating unit circuits 21 by means of an air switch provided in each first heating unit circuit 21.

The second heating circuit 132 is connected to the frequency converter 11 and the control circuit 12, as shown in fig. 5, the second heating circuit 132 includes at least one second heating unit circuit 31, and the second heating unit circuit 31 includes a second heating control circuit 311 and a second heating device 312. Specifically, the second heating circuit 132 may include one second heating unit circuit 31, or may include two or more second heating unit circuits 31, for example, two second heating unit circuits 31 are illustrated in fig. 5.

Specifically, the second heating control circuit 311 is connected to the frequency converter 11 and the control circuit 12, and is configured to be turned on when the amplitude of the received second heating signal satisfies a second preset condition. The second heating device 312 is connected to the second heating control circuit 311, and is used for heating the external device when the second heating control circuit 311 is turned on.

In a specific embodiment, the connection between the second heating unit circuit 31 and the frequency converter 11 and the control circuit 12 is shown in fig. 6, and the second heating control circuit 311 includes: a third diode D3, a second switching tube IGBT2, a fourth diode D4, a second current detection circuit 3111 and a second switching circuit 3112.

One end of the third diode D3 is used for receiving the second power supply signal VDD2, and the other end of the third diode D3 is connected to the first end of the second switch tube IGBT 2.

A second end of the second switching tube IGBT2 is connected to the control circuit 12, and is configured to receive the second heating signal and conduct when the second heating signal satisfies a second preset condition; the third terminal of the second switching tube IGBT2 is connected to the frequency converter 11, and it is used to receive the second power signal DC-.

One end of the fourth diode D4 is connected to the first end of the second switch tube IGBT2, and the other end of the fourth diode D4 is connected to the third end of the second switch tube IGBT 2.

Specifically, a first end of the second switching tube IGBT2 is a drain, a second end of the second switching tube IGBT2 is a gate, and a third end of the second switching tube IGBT2 is a source; one end of the third diode D3 is a cathode, and the other end of the third diode D3 is an anode; one end of the fourth diode D4 is a cathode, and the other end of the fourth diode D4 is an anode.

One end of the second heating device 312 is connected to one end of the third diode D3, and the other end of the second heating device 312 is connected to the other end of the third diode D3 and the first end of the second switching tube IGBT2, so that the external device is heated when the second switching tube IGBT2 is turned on. Further, the second heating device 312 may be a heating coil, and when the second switching tube IGBT2 is turned on, the second power signal DC-is applied to the heating coil, so that the heating coil generates heat, thereby heating the external device.

With reference to fig. 6, the second heating control circuit 311 further includes a second current detecting circuit 3111 and a second switch circuit 3112.

The second current detection circuit 3111 is connected to one end of the second heating device 312, and is configured to detect a magnitude of the second current signal input to the second heating device 312, and feed back the second current signal to the control circuit 12, so that the control circuit 12 controls the second switching tube IGBT2 to turn off when the magnitude of the second current signal is greater than a second preset current threshold. Specifically, the second current signal is a current flowing into the second heating device 312 when the second switching transistor IGBT2 is turned on, so that the second heating device 312 generates heat, and the value of the second preset current threshold may be set according to the maximum current threshold that can be borne by the devices in the second heating unit circuit 31.

Further, the second current detection circuit 3111 may feed back the amplitude of the second current signal to the control circuit 12 when the second switching tube IGBT2 is turned on, the control circuit 12 may determine the amplitude of the second current signal when receiving the feedback information, and when determining that the amplitude of the second current signal is too large, the control circuit sends a cut-off signal to the second switching tube IGBT2 to control the second switching tube IGBT2 to be in a cut-off state, so as to protect the second heating unit circuit 31 during overcurrent.

The second switch circuit 3112 is connected to the second heating device 312 and the second current detection circuit 3111, and is configured to close a path between the second switching tube IGBT2 and the second heating device 312 after detecting that the amplitude of the signal input to the second heating device 312 exceeds a second preset amplitude range, so that the second heating unit circuit 31 can be protected when an overcurrent, an overvoltage, or a short circuit occurs. Specifically, the second predetermined amplitude range may be a voltage range or a current range, and the value thereof may be set according to specific application requirements, and further, the second switch circuit 3112 may be an air switch, and the specific setting is similar to that of the first switch circuit 2112, which is not described herein again.

In another specific embodiment, as shown in fig. 7, taking the number of the first heating unit circuits 21 and the number of the second heating unit circuits 31 as an example, the first heating circuit 131 further includes a first filter capacitor C1, the first filter capacitor C1 is connected to the first heating unit circuit 21, specifically, one end of the first filter capacitor C1 is connected to the first end of the first switch tube IGBT1, and the other end of the first filter capacitor C1 is connected to the other end of the second diode D2. The second heating circuit 132 further includes a second filter capacitor C2, the second filter capacitor C2 is connected to the second heating unit circuit 31, specifically, one end of the second filter capacitor C2 is connected to one end of the third diode D3, and the other end of the second filter capacitor C2 is connected to the third end of the second switching tube IGBT 2.

Further, the first filtering capacitor C1 and the second filtering capacitor C2 may respectively filter the first power signal DC + and the second power signal DC-input to the first heating unit circuit 21 and the second heating unit circuit 31, so as to filter noise generated during transmission of the first power signal DC + and the second power signal DC-and ensure that the first heating unit circuit 21 and the second heating unit circuit 31 receive the first power signal DC + and the second power signal DC-with smooth waveforms.

With continued reference to fig. 2, the frequency converter 11 further includes an inverter 113, the heating controller further includes a motor 15, and the inverter 113 is connected to the buffer filter circuit 112 and the control circuit 12, and is configured to receive the first control signal output by the control circuit 12, and determine whether to output the driving signal based on the first control signal. The motor 15 is connected to the inverter 113, and is configured to receive a driving signal output from the inverter 113 when the inverter 113 is turned on, so as to operate normally after receiving the driving signal.

Specifically, the control circuit 12 may realize control of the inverter 113 by outputting a first control signal of a high level or a low level. For example, when the first control signal is at a high level, the inverter 113 is turned on to output a driving signal; when the first control signal is at a low level, the inverter 113 is turned off, and the driving signal is not output; it is to be understood that the inverter 113 may be set to be turned on when the first control signal is at a low level, and the inverter 113 may be set to be turned off when the first control signal is at a high level.

Further, the high level may be set to be 2.5V to 5V, and the low level may be set to be 0V to 0.3V, for example, when the voltage of the first control signal is 3V, the first control signal is high; when the voltage of the first control signal is 0V, the first control signal is at a low level. It is understood that the voltage range of the high level can be set to 3V to 5V, the voltage range of the low level can be set to 0.3V to 0.6V, and the settings of the high level and the low level can be set according to actual situations.

With continued reference to fig. 2, the heating controller further includes a logic circuit 14, wherein the logic circuit 14 is connected to the control circuit 12, and is configured to collect an external signal, generate a second control signal based on the external signal, and send the second control signal to the control circuit 12, so that the control circuit 12 generates the first heating signal and the second heating signal.

The logic circuit 14 performs logic judgment on the external signal after acquiring the external signal, specifically, the logic circuit 14 acquires temperature information of the external device heated by the heating circuit 13, judges that the temperature of the external device is too high, outputs a second control signal to the control circuit 12 at this time, and the control circuit 12 outputs a first heating signal and a second heating signal of corresponding amplitudes to the heating circuit 13 according to the second control signal, and controls the heating circuit 13 to stop heating. In addition, the logic circuit 14 can also output a third control signal to the control circuit 12, so that the control circuit 12 controls the inverter 113 to stop, thereby implementing a Safe Torque Off (STO) function.

Further, the logic circuit 14 may be connected to a plurality of sensors (not shown), such as a safety plate, an electronic ruler, a position switch, a solenoid valve, a thermocouple, or the like, to collect an external signal and output a second control signal to control the control circuit 12 according to the collected external signal.

In another embodiment, the heating controller may further comprise an interactive panel (not shown), which is connected to the control circuit 12 and can interact with the control circuit 12 to adjust parameters of the heating circuit 13. For example, parameters such as a temperature threshold, heating power, or heating time for heating the heating circuit 13 may be adjusted and set through the interactive panel.

The heating circuit in this embodiment includes first heating circuit and second heating circuit, and first heating circuit and second heating circuit include at least one heating unit circuit respectively, and whether every heating unit circuit heats and is controlled by control circuit to can realize heating safely high-efficiently more, help promoting heating efficiency, shorten heating time. And adopt the switch tube to realize the heating control to the heating unit circuit among the heating unit circuit, can reduce cost to the device volume is less, can also reduce the holistic size of heating controller, is convenient for integrate. Meanwhile, the current detection circuit can be used for feeding back the magnitude of a current signal input to the heating device to the control circuit, so that the switching tube can be controlled to be cut off in time when overcurrent or overload and other conditions occur; in addition, the first switch circuit and the second switch circuit can be disconnected when overcurrent, overvoltage or short circuit occurs, so that the circuit is protected, the heating process is safer, and the first switch circuit and the second switch circuit can be disconnected when other devices break down, so that an operator can safely maintain or replace the devices, and later maintenance is facilitated; meanwhile, the mode that the heating circuit receives the power supply signal output by the frequency converter to heat is adopted, the voltage on a bus in the frequency converter can be consumed, the braking effect is achieved, a braking circuit and a braking resistor which are required when an inverter in the frequency converter operates are omitted, the cost is saved, and the heating circuit is simplified.

Referring to fig. 8, fig. 8 is a schematic structural diagram of an embodiment of a heating device provided in the present application, the heating device 100 includes a heating controller 10 and a charging barrel 20, the heating controller 10 is used for heating the charging barrel 20, and the heating controller 10 is the heating controller in the above embodiment and is not described herein again; the heating device 100 may be an injection molding machine or an extruder, or other equipment requiring heating.

The heating device 100 may further include a power board (not shown) connected to the frequency converter in the heating controller 10 for receiving the first power signal and the second power signal output by the frequency converter. Furthermore, the power panel can be externally connected with other equipment, and the power panel supplies power to the other equipment by receiving the first power signal and the second power signal.

The above description is only an example of the present application and is not intended to limit the scope of the present application, and all modifications of equivalent structures and equivalent processes, which are made by the contents of the specification and the drawings, or which are directly or indirectly applied to other related technical fields, are intended to be included within the scope of the present application.

Claims (10)

1. A heating controller, comprising:

the frequency converter is used for receiving a first power supply signal, processing the first power supply signal and generating a power supply signal; wherein the power signals comprise a first power signal and a second power signal;

a control circuit for generating a first heating signal and a second heating signal;

the heating circuit comprises a first heating circuit and a second heating circuit, the first heating circuit is connected with the frequency converter and is used for receiving the first power supply signal, the second power supply signal and the first heating signal and heating external equipment when the amplitude of the first heating signal meets a first preset condition, wherein the first power supply signal and the second power supply signal are used for supplying power to the first heating circuit; the second heating circuit is connected with the frequency converter and used for receiving the second power supply signal, the second power supply signal and the second heating signal and heating the external equipment when the amplitude of the second heating signal meets a second preset condition, wherein the second power supply signal and the second power supply signal are used for supplying power to the second heating circuit.

2. The heating controller according to claim 1,

the first heating circuit includes: the first heating unit circuit comprises a first heating control circuit and a first heating device, and the first heating control circuit is connected with the frequency converter and the control circuit and is used for being conducted when the amplitude of the received first heating signal meets the first preset condition; the first heating device is connected with the first heating control circuit and used for heating the external equipment when the first heating control circuit is conducted;

the second heating circuit includes: the second heating unit circuit comprises a second heating control circuit and a second heating device, and the second heating control circuit is connected with the frequency converter and the control circuit and is used for being conducted when the amplitude of the received second heating signal meets a second preset condition; the second heating device is connected with the second heating control circuit and used for heating the external equipment when the second heating control circuit is conducted.

3. The heating controller of claim 2, wherein the first heating control circuit comprises:

a first end of the first switch tube is connected with the frequency converter and used for receiving the first power supply signal, and a second end of the first switch tube is connected with the control circuit and used for receiving the first heating signal;

one end of the first diode is connected with the first end of the first switch tube, and the other end of the first diode is connected with the third end of the first switch tube;

one end of the second diode is connected with the third end of the first switching tube, and the other end of the second diode is used for receiving the second power supply signal;

one end of the first heating device is connected with the third end of the first switching tube, and the other end of the first heating device is connected with the other end of the second diode.

4. The heating controller of claim 3, wherein the first heating control circuit further comprises:

the first current detection circuit is connected with one end of the first heating device and used for detecting the magnitude of a first current signal input to the first heating device and feeding the first current signal back to the control circuit, so that the control circuit controls the first switching tube to be cut off when the amplitude of the first current signal is larger than a first preset current threshold;

and the first switching circuit is connected with the first heating device and the first current detection circuit and used for closing a path between the first switching tube and the first heating device after detecting that the amplitude of the signal input to the first heating device exceeds a first preset amplitude range.

5. The heating controller of claim 2, wherein the second heating control circuit comprises:

a third diode, one end of the third diode being used for receiving the second supply signal;

a first end of the second switching tube is connected with the other end of the third diode, a second end of the second switching tube is connected with the control circuit and used for receiving the second heating signal, and a third end of the second switching tube is connected with the frequency converter and used for receiving the second power supply signal;

one end of the fourth diode is connected with the first end of the second switching tube, and the other end of the fourth diode is connected with the third end of the second switching tube;

one end of the second heating device is connected with one end of the third diode, and the other end of the second heating device is connected with the other end of the third diode and the first end of the second switching tube.

6. The heating controller of claim 5, wherein the second heating control circuit further comprises:

the second current detection circuit is connected with one end of the second heating device and used for detecting the magnitude of a second current signal input to the second heating device and feeding the second current signal back to the control circuit, so that the control circuit controls the second switching tube to be cut off when the magnitude of the second current signal is larger than a second preset current threshold;

and the second switching circuit is connected with the second heating device and the second current detection circuit and used for closing a path between the second switching tube and the second heating device after detecting that the amplitude of the signal input to the second heating device exceeds a second preset amplitude range.

7. The heating controller of claim 1, wherein the frequency converter comprises:

the rectifying circuit is used for rectifying the received first power supply signal and outputting a rectified signal;

and the buffer filter circuit is connected with the rectifying circuit and the heating circuit and used for carrying out buffer filter processing on the rectified signal and outputting the first power supply signal and the second power supply signal to the heating circuit.

8. The heating controller according to claim 7,

the frequency converter further comprises an inverter, wherein the inverter is connected with the buffer filter circuit and the control circuit and is used for receiving a first control signal output by the control circuit and determining whether to output a driving signal based on the first control signal; the heating controller further comprises a motor, wherein the motor is connected with the inverter and is used for running after receiving the driving signal output by the inverter.

9. The heating controller according to claim 1,

the heating controller further comprises a logic circuit, wherein the logic circuit is connected with the control circuit and used for collecting external signals, generating second control signals based on the external signals and sending the second control signals to the control circuit, so that the control circuit can generate the first heating signals and the second heating signals.

10. A heating device comprising a heating controller and a cartridge, the heating controller being for heating the cartridge, wherein the heating controller is as claimed in any one of claims 1 to 9.

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