CN117812860A - Temperature control system and industrial oven - Google Patents
Temperature control system and industrial oven Download PDFInfo
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- CN117812860A CN117812860A CN202311793490.0A CN202311793490A CN117812860A CN 117812860 A CN117812860 A CN 117812860A CN 202311793490 A CN202311793490 A CN 202311793490A CN 117812860 A CN117812860 A CN 117812860A
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Abstract
The invention relates to the technical field of temperature control, and particularly discloses a temperature control system and an industrial oven, wherein the temperature control system comprises a power regulator assembly; the power regulator assembly includes a power adapter in communication with the temperature control host and at least one power regulator in communication with the power adapter; the power regulator comprises a power regulator control chip and a plurality of thyristors electrically connected with the power regulator control chip, wherein the power regulator control chip is in communication connection with the power adapter, the thyristors are arranged in parallel, and each thyristor is also electrically connected with a load connecting terminal; the power adapter sends the power on-off instruction to a power regulator control chip in the corresponding power regulator, and the power regulator control chip in the power regulator controls the corresponding silicon controlled rectifier to be powered on and powered off according to the instruction transmitted by the power adapter. The temperature control system can control a plurality of loads through the power regulator assembly, and the power regulator assembly is small in occupied space, less in wiring, simple in wiring, capable of avoiding more and scattered wires and convenient to regulate.
Description
Technical Field
The invention relates to the technical field of temperature control, in particular to a temperature control system and an industrial oven with the temperature control system.
Background
The temperature control system is a device or system for monitoring and adjusting the temperature of a specific environment (e.g., an industrial oven), senses a temperature change through a temperature sensor, and transmits data to a control unit, which compares the difference between an actual temperature and a target temperature according to a preset temperature range, and controls the on/off of a heating element through an execution unit so as to maintain the temperature of the specific environment within the set temperature range.
Solid state relays are commonly used in temperature control systems as an actuator to control the on and off of the heating element. However, in the prior art, a single solid state relay can only control the on/off of a single heating element, and as the number of the heating elements increases, the number of the solid state relays needs to be correspondingly increased; particularly in a temperature control system, more heating elements are required to be adopted in a single temperature control device, at this time, the number of required solid state relays is correspondingly increased, along with the increase of the number of the solid state relays, the installation space required in the temperature control device is correspondingly increased, and each solid state relay is required to be separately connected with a power supply and a control module (such as a TEB or a temperature control host), so that the required wires are very many, the wires are complex, the wires are scattered and difficult to be regular.
Disclosure of Invention
The invention aims to solve the technical problems in the prior art, and provides a temperature control system which is provided with a power regulator assembly, and the power on/off of a plurality of heating elements can be controlled through the power regulator assembly, so that the occupied space of the heating elements in the temperature control system is reduced, meanwhile, the wiring is less, the wiring is simple, the wires are avoided from being more and scattered, and the temperature control system is convenient to regulate.
The invention further provides an industrial oven with the temperature control system.
In order to solve the technical problems, the invention provides the following technical scheme:
the temperature control system comprises a temperature control host, at least one group of power regulator components and a temperature acquisition component;
the temperature acquisition part is used for acquiring the temperature in real time and transmitting the acquired real-time temperature information to the temperature control host;
the temperature control host is used for receiving the real-time temperature information transmitted by the temperature acquisition part, comparing the received real-time temperature information with a preset target temperature, sending a command to the power regulator assembly to perform power-off processing on the corresponding heating part if the real-time temperature information is higher than the target temperature, and sending a command to the power regulator assembly to perform power-on processing on the corresponding heating part if the real-time temperature information is lower than the target temperature;
The power regulator component is used for receiving an instruction sent by the temperature control host computer so as to enable the corresponding heating element to be powered on and off;
wherein the power regulator assembly comprises a power adapter in communication with the temperature control host and at least one power regulator in communication with the power adapter; the power regulator comprises a power regulator control chip and a plurality of thyristors electrically connected with the power regulator control chip, wherein the power regulator control chip is in communication connection with the power adapter, the thyristors are arranged in parallel, and each thyristor is also electrically connected with a load connecting terminal; the power adapter sends the power on-off instruction to a power regulator control chip in the corresponding power regulator, and the power regulator control chip in the power regulator controls the corresponding silicon controlled rectifier to be powered on and powered off according to the instruction transmitted by the power adapter.
When the temperature control system is applied, the corresponding number of power regulators are arranged according to the number of heating elements in the use environment, each heating element is connected to one load connecting terminal one by one, when only one power regulator is arranged, the power regulator is directly connected with the power adapter in a communication way, when a plurality of power regulators are arranged, the power regulators are sequentially connected in a communication way, and meanwhile, the power regulators adjacent to the power adapter are communicated with the power adapter in a signal way, so that one power adapter can control a plurality of power regulators simultaneously; the power adapter is also in communication connection with the temperature control host, the temperature acquisition piece is used for transmitting real-time temperature information to the temperature control host, the temperature control host is used for comparing the received real-time temperature information with a preset target temperature, an instruction is sent to the power adapter according to a comparison judging result, after the power adapter receives the instruction, the power adapter sends an on-off instruction to a power regulator control chip of a corresponding power regulator, and the power regulator control chip in the power regulator is used for controlling the on-off of a corresponding silicon controlled rectifier according to the instruction transmitted by the power adapter, so that the on-off of a heating piece connected with the silicon controlled rectifier is controlled. The power adapter is matched with at least one power regulator, and one power regulator can respectively control the on-off of a plurality of heating elements, so that the problem that one heating element is provided with one solid-state relay in the prior art is avoided, the space occupation rate is greatly reduced, meanwhile, as one power adapter can be simultaneously connected with a plurality of power regulators in a communication mode, and one power regulator can control the on-off of a plurality of heating elements, the problem that each solid-state relay needs to be respectively connected with a power supply and a control module when a plurality of solid-state relays are needed in the prior art is avoided, the use of wires is greatly reduced, the wiring is simpler, the wires are avoided from being more and scattered, and the regularity of the wires is facilitated. Therefore, the power regulator assembly replaces the traditional solid state relay to control the on and off of the heating element, so that the space occupation rate can be greatly reduced, and the use of wires can be greatly reduced.
Further, the temperature control host obtains output power output to the corresponding heating element through a PID algorithm according to the received real-time temperature information and the preset target temperature of the corresponding heating element, and sends the output power to a power adapter in the corresponding power regulator assembly in a PWM duty ratio control mode, and the power adapter controls corresponding controllable silicon controlled by the corresponding power regulator to be uniformly powered on and powered off in unit time according to the received output power instruction so as to control the corresponding heating element to be uniformly powered on and powered off in unit time.
Furthermore, the times of on-off of all the thyristors in unit time form a matrix, and the on-off time points of adjacent thyristors in the matrix are arranged in a staggered manner.
Further, the power regulator comprises two mutually connected PCB boards, the two PCB boards are connected with each other through pins and bus bars or copper columns and screws, the power regulator control chip and the plurality of thyristors are arranged on one PCB board, and the load wiring terminal is arranged on the other PCB board.
Further, a plurality of first optocouplers are arranged on the PCB provided with the thyristors, the number of the first optocouplers is the same as that of the thyristors, and each thyristor is connected with one first optocoupler in series.
Further, a plurality of fuses are arranged on the PCB provided with the load connecting terminals, the number of the fuses is the same as that of the thyristors, and one fuse is connected in series between each thyristor and the load connecting terminal.
Further, a strong electric wiring terminal is further arranged on the PCB provided with the load wiring terminal, the strong electric wiring terminal is respectively connected with each silicon controlled rectifier in series, and the strong electric wiring terminal is also connected with a 220V power supply in series.
Further, a plurality of second optocouplers are further arranged on the PCB provided with the first optocouplers, the plurality of second optocouplers are arranged in parallel, one second optocoupler is electrically connected to the strong electric wiring terminal, the other second optocouplers are respectively electrically connected to the load wiring terminal, and resistors are further connected in series between one second optocoupler and the strong electric wiring terminal and between the other second optocouplers and the corresponding load wiring terminals; all the second optocouplers are also electrically connected to the power regulator control chip.
Further, all the second optocouplers are electrically connected with a latch, and are electrically connected to the power regulator control chip through the latch.
Further, the plurality of thyristors are arranged in a double-row interval mode, a heat dissipation aluminum piece is arranged between the two rows of thyristors, and each thyristor is tightly attached to the heat dissipation aluminum piece.
Further, the heat dissipation aluminum piece is square, a cavity is formed in the heat dissipation aluminum piece, two ends of the cavity penetrate through two ends of the heat dissipation aluminum piece, a plurality of heat dissipation fins are arranged on the inner wall of the cavity at intervals, and heat dissipation channels are formed between every two adjacent heat dissipation fins.
Further, an air supply piece is arranged at one port of the heat dissipation aluminum piece and is electrically connected with the power regulator control chip; the air supply piece is also provided with a temperature sensor which is electrically connected with the power regulator control chip; and/or a current sampling element is connected in series between the air supply piece and the power regulator control chip.
Further, the power regulator assembly further comprises a watchdog module, wherein the watchdog module is connected in series with a circuit formed by connecting a plurality of first optocouplers in parallel, and the watchdog module is further electrically connected to the power regulator control chip.
Further, the power adapter comprises a power adapter control chip, the power adapter control chip is in communication connection with the power regulator control chip, the power adapter further comprises a first splicing terminal electrically connected with the power adapter control chip, the power regulator further comprises a third splicing terminal and a second splicing terminal electrically connected with the power regulator control chip, when the power regulator is provided with one power regulator, the first splicing terminal on the power adapter is electrically connected with the second splicing terminal on the power regulator, when the power regulator is provided with a plurality of power regulators, the first splicing terminal on the power adapter is electrically connected with the second splicing terminal on the adjacent power regulator, and the second splicing terminal of the adjacent power regulator is electrically connected with the third splicing terminal.
Further, a tail cover is covered on the power regulator positioned at the tail end, a first span interface and a fourth splicing terminal are arranged on the tail cover, and the fourth splicing terminal is electrically connected with a third splicing terminal on the power regulator; the power adapter also includes a second cross-interface electrically connected to the power adapter control chip.
The invention also provides an industrial oven, which comprises an oven body, wherein a plurality of independent oven chambers are arranged in the oven body, and a carrier for containing products to be baked is arranged in each oven chamber; the temperature control system is also included; the temperature acquisition part in the temperature control system is connected to the carrier or the inner wall of the furnace chamber; the heating element is arranged in the furnace chamber.
The temperature control system has all the beneficial technical effects brought by the temperature control system, and the detailed description is omitted.
Drawings
The foregoing and other objects, features and advantages of the invention will be apparent from the following more particular description of preferred embodiments of the invention, as illustrated in the accompanying drawings. Like reference numerals refer to like parts throughout the drawings, and the drawings are not intentionally drawn to scale on actual size or the like, with emphasis on illustrating the principles of the invention.
FIG. 1 is a block diagram of a temperature control host and a power adapter in communication with TMC via RS 485.
Fig. 2 is a block diagram of a communication connection between a temperature control host and a power adapter through RS485 and a PLC.
FIG. 3 is a block diagram of a temperature control host and power adapter in communication with a PLC via an ETHERCAT.
Fig. 4 is a schematic diagram of a power regulator assembly according to the present invention.
Fig. 5 is a schematic block diagram of a power regulator in accordance with the present invention.
Fig. 6 is a schematic view of the internal structure of the power regulator in different directions with the housing removed.
FIG. 7 is a schematic diagram of a power-on/off time matrix of all thyristors.
Fig. 8 is a functional block diagram of a power adapter in accordance with the present invention.
Fig. 9 is an exploded view of the housing of the power conditioner in different directions.
Fig. 10 is a schematic diagram of a housing structure of the power adapter.
Fig. 11 is a schematic diagram of a circuit structure of the watchdog module.
Wherein the power adapter 1; a power regulator 2; a load connection terminal 3; a PCB 4; a silicon controlled rectifier 5; a fuse 6; a metal spring clip 7; a strong current connection terminal 8; a heat-radiating aluminum member 9; a heat radiation fin 10; an air supply member 11; a first splice terminal 12; a third splice terminal 13; a second splice terminal 14; a tail cap 15; a first cross-port 16; a third U-shaped groove 17; a second cross-port 18; a first housing 19; a first protrusion 20; a second U-shaped groove 23; a ventilation grille 24; a vent 25; a groove 26; a partition plate 27; a cover plate 28; a fixed shaft 29; a receiving groove 30; a clasp 31; a second housing 32.
Detailed Description
In order that the invention may be understood more fully, the invention will be described with reference to the accompanying drawings.
It will be understood that when an element is referred to as being "connected" to another element, it can be directly connected to and integrated with the other element or intervening elements may also be present. The terms "mounted," "one end," "the other end," and the like are used herein for illustrative purposes only.
Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art. The terminology used in the description herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. The term "and/or" as used herein includes any and all combinations of one or more of the associated listed items.
The invention specifically discloses an implementation mode of a temperature control system, when the temperature control system is applied, real-time temperature information is transmitted to a temperature control host through a temperature acquisition part, the temperature control host compares the received real-time temperature information with a preset target temperature, an instruction is sent to a power adapter 1 according to a comparison judging result, after the power adapter 1 receives the instruction, the power adapter 1 sends an on-off instruction to a power regulator control chip of a corresponding power regulator 2, and the power regulator control chip in the power regulator 2 controls the corresponding silicon controlled rectifier 5 to be turned on and off according to the instruction transmitted by the power adapter 1, so that the on-off of a heating part connected with the silicon controlled rectifier 5 is controlled. The temperature control host may be a temperature control module (Temperature Management Control Module, abbreviated as TMC) or PLC (Programmable Logic Controller), and is connected with the temperature control host by RS485 or EtherCAT (industrial ethernet) through a power adapter 1 in the power regulator assembly, as shown in fig. 1-3. The temperature acquisition piece can be a temperature acquisition plate or a temperature sensor.
In this embodiment, referring to fig. 1-6, the temperature control system includes a temperature control host, at least one set of power regulator components, and a temperature acquisition component; the power regulator components can be provided with one group, two groups, three groups and even more groups, and the power adapter of each group of power regulator components is respectively in communication connection with the temperature control host through RS485 or EtherCAT when the power regulator components are provided with a plurality of groups of power regulator components according to the number of heating elements in the use environment. The temperature acquisition part is used for acquiring the temperature in real time and transmitting the acquired real-time temperature information to the temperature control host. The temperature control host is used for receiving the real-time temperature information transmitted by the temperature acquisition component, comparing the received real-time temperature information with a preset target temperature, sending a command to the power regulator component to perform power-off processing on the corresponding heating component if the real-time temperature information is higher than the target temperature, and sending a command to the power regulator component to perform power-on processing on the corresponding heating component if the real-time temperature information is lower than the target temperature. The power regulator component is used for receiving an instruction sent by the temperature control host computer so as to enable the corresponding heating element to be powered on and off; wherein the power regulator assembly comprises a power adapter 1 in communication with the temperature control host and at least one power regulator 2 in communication with the power adapter 1; the number of the power regulators 2 can be only one or a plurality, and is determined according to the number of heating elements which are actually required to be controlled. The power regulator 2 includes a power regulator control chip and a plurality of thyristors 5 electrically connected to the power regulator control chip, where the power regulator control chip may be a microcontroller, and the model is determined according to actual requirements. The power regulator control chip is in communication connection with the power adapter 1, the thyristors 5 are arranged in parallel, and each thyristor 5 is also electrically connected with a load connecting terminal 3; the power adapter sends a power on-off instruction to a power regulator control chip in the corresponding power regulator 2, the power regulator control chip in the power regulator 2 controls the corresponding silicon controlled rectifier 5 to be powered on and powered off according to the instruction transmitted by the power adapter 1, and the heating element connected in series with the silicon controlled rectifier 5 is controlled to be powered on and powered off through the power on and power off of the silicon controlled rectifier 5.
In a preferred embodiment, the temperature control host obtains output power output to the corresponding heating element through a PID algorithm according to the received real-time temperature information and the preset target temperature of the corresponding heating element, and sends the output power to the power adapter 1 in the corresponding power regulator assembly in a PWM duty ratio control manner, and the power adapter 1 controls the corresponding silicon controlled rectifier 5 controlled by the corresponding power regulator 2 to be uniformly turned on and off in unit time according to the received output power instruction, so as to realize the principle that the corresponding heating element is uniformly turned on and off in unit time by slicing into a plurality of slicing times with equal size in unit time, usually in millisecond level, each slicing time corresponds to one on and off control, and the on and off intervals are controlled to be average in unit time for controlling the corresponding heating element to be uniformly turned on and off in unit time. For example, according to the received real-time temperature information of the corresponding heating element and the preset target temperature, the temperature control host obtains that the output power output to the corresponding heating element is pwm=50% through a PID algorithm, and sends the output power to the power adapter 1 in the corresponding power regulator assembly through a PWM control mode, and the power adapter 1 controls the corresponding silicon controlled rectifier 5 controlled by the corresponding power regulator 2 to be uniformly powered on and powered off in unit time 1S for 10ms, namely 10ms and 10ms, according to the received output power instruction, so as to control the corresponding heating element to be uniformly powered on and powered off in unit time 1S for 10ms and 10 ms. Through the mode, the application environment can be ensured to be always in a constant temperature state, and the purpose of finer constant temperature control is achieved.
In the preferred embodiment, referring to fig. 7, the number of times of turning on and off the power of all the thyristors 5 in a unit time forms a matrix, and the power-on time points of adjacent thyristors 5 in the matrix are arranged in a staggered manner. For example, taking pwm=50% of output power as an example, the number of times of on-off of each silicon controlled rectifier 5 in 1S of unit time is one channel, all the times of on-off of the silicon controlled rectifiers 5 in 1S form a multi-channel, the multi-channel forms a matrix from top to bottom, when 10ms is uniformly on-off in 1S, 0 is used for powering off, 1 is used for powering on, on-off time points of the silicon controlled rectifiers 5 of adjacent channels in the matrix are arranged in a staggered manner, that is, when the silicon controlled rectifiers 5 in the previous channel or the next channel are in a power-off state at a certain time point, the silicon controlled rectifiers 5 of one channel between the two are in a power-on state at the time point. Through the mode, all heating elements controlled by the controllable silicon 5 can be prevented from being simultaneously powered on and powered off, so that potential safety hazards caused by overlarge power bearing amplitude of a power supply when all the heating elements are simultaneously powered on are avoided.
Referring to fig. 6, in a preferred embodiment, the power regulator 2 includes two PCBs 4 connected to each other, where the two PCBs 4 are connected by pins and pins or copper pillars and screws, and both the pin and the screw are connected; the power regulator control chip and the plurality of thyristors 5 are arranged on one of the PCB boards 4, and the load connection terminal 3 is arranged on the other PCB board 4. Specifically, in this embodiment, the two PCBs 4 are arranged at intervals up and down, the power regulator control chip and all thyristors 5 are all disposed on the PCB 4 located below, and all load connection terminals 3 are disposed on the PCB 4 located above. The connection of the pin header and the bus bar or the connection of the copper column and the screw are used for realizing the transmission of current or signals between the two PCB boards 4; the components are arranged on different PCB boards 4, so that the size of a single PCB board 4 can be reduced, the occupation of a large installation space is avoided, and the formed final product is compact in structure and small in size.
In a preferred embodiment, referring to fig. 5, a plurality of first optocouplers are disposed on a PCB board 4 provided with thyristors 5, the number of the first optocouplers is the same as that of the thyristors 5, and each of the thyristors 5 is serially connected with one of the first optocouplers. The isolation of the input and output signals is realized by arranging the first optocoupler, so that the normal operation of the circuit is ensured.
In a preferred embodiment, referring to fig. 5 and 6, a plurality of fuses 6 are provided on the PCB board 4 provided with the load connection terminals 3, the number of the fuses 6 is the same as that of the thyristors 5, and one of the fuses 6 is connected in series between each of the thyristors 5 and the load connection terminal 3. When the current in the circuit exceeds the rated current of the fuse 6, the fuse 6 is automatically fused, so that the circuit is cut off, and the heating element is protected from damage. Specifically, a plurality of groups of metal elastic clamp groups are arranged on the PCB 4 provided with the fuses 6, the metal elastic clamp groups are provided with two metal elastic clamps 7 arranged at intervals, the number of the metal elastic clamp groups is the same as that of the fuses 6, each group of metal elastic clamp groups is connected in series on a series circuit of the controllable silicon 5 and the load wiring terminal 3, and the fuse 6 is clamped on each group of metal elastic clamps 7 in each group of metal elastic clamp groups, and as the metal elastic clamps 7 are made of metal materials, the metal elastic clamp groups can conduct electricity, so that the fuses 6 are ensured to be connected in series on the series circuit of the controllable silicon 5 and the load wiring terminal 3.
In the preferred embodiment, referring to fig. 5 and 6, a strong current connection terminal 8 is further provided on the PCB board 4 provided with the load connection terminal 3, and the strong current connection terminal 8 is respectively connected in series with each of the thyristors 5, that is, it can be understood that a circuit formed by connecting a plurality of thyristors 5 in parallel is connected in series with the strong current connection terminal 8, and the strong current connection terminal 8 is also connected in series with the 220V power supply. When the corresponding thyristor 5 is turned on, an external power supply is turned on through the strong electric connection terminal 8 to supply power to the heating element.
In the preferred embodiment, referring to fig. 5, a plurality of second optocouplers are further disposed on the PCB board 4 provided with the first optocouplers, and the plurality of second optocouplers are disposed in parallel, wherein one of the second optocouplers is electrically connected to the strong electric connection terminal 8, the remaining second optocouplers are respectively electrically connected to the load connection terminal 3, and resistors are further connected in series between one of the second optocouplers and the strong electric connection terminal 8 and between the remaining second optocouplers and the corresponding load connection terminal 3; all the second optocouplers are also electrically connected to the power regulator control chip. The voltage signal detection circuit is formed by the second optocoupler, the resistor and the load connecting terminal 3 or by the second optocoupler, the resistor and the strong electric connecting terminal 8, and is electrically connected to the power regulator control chip, whether a voltage signal exists or not is detected in real time by the voltage signal detection circuit, the signal is fed back to the power regulator control chip in real time, the received signal is compared with a control signal sent by an upper computer through the power regulator control chip, whether a corresponding heating element is electrified or powered off according to a control signal instruction of the power adapter 1 is judged, when the voltage signal detection circuit detects the voltage signal, the heating element is in an electrified state, if the control signal of the power adapter 1 received by the power regulator control chip is also an electrified instruction, no fault is judged, otherwise, the corresponding controllable silicon 5 is controlled to be closed, and safe production is ensured.
In a preferred embodiment, referring to fig. 5, all the second optocouplers are electrically connected to a latch, which can be understood that a circuit formed by connecting all the second optocouplers in parallel is connected in series with the latch and electrically connected to the power regulator control chip through the latch. The latch can realize the functions of temporary storage and data delay transmission, so that the detection signals sent by the voltage signal detection circuit are buffered through the latch, and the power regulator control chip can judge the data buffered in the latch in turn.
Referring to fig. 6, in the preferred embodiment, a plurality of thyristors 5 are arranged in a double row at intervals, a heat dissipation aluminum member 9 is disposed between the two rows of thyristors 5, and each of the thyristors 5 is closely attached to the heat dissipation aluminum member 9. Since the thyristor 5 generates a large amount of heat during operation, it is necessary to dissipate heat in time to ensure that the power regulator 2 can operate normally.
Referring to fig. 6, in a preferred embodiment, the heat dissipating aluminum member 9 is square, and has a cavity therein, and two ends of the cavity penetrate through two ends of the heat dissipating aluminum member 9, and a plurality of heat dissipating fins 10 are disposed on an inner wall of the cavity at intervals, and heat dissipating channels are formed between adjacent heat dissipating fins 10. The heat dissipation fins 10 are arranged on the inner wall of the cavity of the heat dissipation aluminum piece 9 at intervals so as to increase the heat dissipation area of the heat dissipation aluminum piece 9 and improve the heat dissipation effect of the heat dissipation aluminum piece 9.
Referring to fig. 6, in a preferred embodiment, an air supply member 11 is disposed at one port of the heat dissipation aluminum member 9, and the air supply member 11 is electrically connected with the power regulator control chip; a temperature sensor is also arranged on the air supply piece 11 and is electrically connected with the power regulator control chip; and/or a current sampling element is connected in series between the air supply member 11 and the power regulator control chip. Through setting up air supply piece 11, take away the heat on the heat dissipation aluminum part 9 fast to promote the radiating effect, ensure power regulator 2 normal work. In addition, the temperature of the air supply piece 11 is acquired in real time through a temperature sensor, the current of the fan is obtained through a current sampling element, and the power regulator control chip controls the wind speed of the air supply piece 11 according to the temperature and the current in the circuit. The blower 11 may be a fan.
In a preferred embodiment, referring to fig. 5, the power regulator assembly further includes a watchdog module connected in series with a circuit formed by connecting the plurality of first optocouplers in parallel, and the watchdog module is further electrically connected to the power regulator control chip. The operational status of the power regulator 2 is periodically checked by the watchdog module, providing a fault tolerant mechanism to ensure reliability and stability of the operation of the power regulator components. Specifically, referring to fig. 11, the watchdog module includes an RC timing circuit and a signal output circuit, where the RC timing circuit includes a capacitor C1 and a resistor R1, and the capacitor C1 and the resistor R1 are connected in parallel; the signal output circuit comprises a resistor R2 and a MOS tube Q1, and the resistor R2 and the MOS tube Q1 are connected in parallel; the RC timing circuit is connected with the signal output circuit through the MOS tube Q2, a voltage stabilizing diode D1 is connected in parallel between the S pole and the D pole of the MOS tube Q2, and the stability of the watchdog module is better, the response speed is high and the loss is small through connecting the voltage stabilizing diode D1 in parallel on the MOS tube Q2; the RC timing circuit is also connected with a capacitor C2 and a Schottky diode D2 in series, a Schottky diode D3 is also connected between the capacitor C2 and the Schottky diode D2, the watchdog module also comprises a capacitor C3 and a capacitor C4, the capacitor C3 and the capacitor C4 are connected in parallel, and a parallel circuit formed by the capacitor C3 and the capacitor C4 is connected in series with the signal output circuit; when the power regulator assembly works normally, a signal is output to the watchdog module (namely 'feeding dog') at intervals, so that the watchdog module is cleared, if the 'feeding dog' operation is not carried out for more than a specified time, the timing of the watchdog module is more than that, and a reset signal is given to the power regulator control chip at the moment, so that the power regulator control chip is reset, and the occurrence of the condition that the power regulator control chip is halted is avoided.
The watchdog module belongs to one of the abnormal protection mechanisms in the temperature control system, and in addition, the power adapter control chip of the power adapter 1 can also judge whether the temperature control host has PWM output power data of the channel corresponding to each silicon controlled rectifier 5 below, if the PWM output power data of the channel corresponding to any silicon controlled rectifier 5 is not received for more than a preset time (such as 3 seconds), the power adapter 1 sends a command to the corresponding power regulator 2, so that the power regulator 2 controls the corresponding silicon controlled rectifier 5 to be disconnected, and potential safety hazards caused by continuous heating of a heating piece corresponding to the silicon controlled rectifier 5 are avoided. In addition, when the power regulator 2 is halted, all thyristors 5 controlled by the power regulator 2 are all disconnected, so that all heating elements corresponding to the thyristors 5 are powered off, and the potential safety hazard caused by continuous heating of the heating elements is avoided.
Referring to fig. 8, in a preferred embodiment, the power adapter 1 includes a power adapter control chip, the power adapter control chip is in communication connection with a power regulator control chip, the power adapter 1 further includes a first splicing terminal 12 electrically connected with the power adapter control chip, the power regulator 2 further includes a third splicing terminal 13 and a second splicing terminal 14 electrically connected with the power regulator control chip, when the power regulator 2 has one power regulator, the first splicing terminal 12 on the power adapter 1 is electrically connected with the second splicing terminal 14 on the power regulator 2, when the power regulator 2 has a plurality of power regulators, the first splicing terminal 12 on the power adapter 1 is electrically connected with the second splicing terminal 14 on an adjacent power regulator 2, for example, when the power regulator 2 has two power regulators, the power regulator 2 next to the power regulator 1 is the first power regulator 2, the next power regulator 2 is arranged in sequence from the first power regulator 2 to the second splicing terminal 14, the second splicing terminal 2 is connected with the third splicing terminal 13, and the second splicing terminal 14 is connected with the second splicing terminal 14 of the power regulator 2, and so on.
Referring to fig. 4, in the preferred embodiment, a tail cover 15 is covered on the power regulator 2 located at the tail end, and a first cross interface 16 and a fourth splice terminal (not shown in the figure) are disposed on the tail cover 15, and the fourth splice terminal is electrically connected with the third splice terminal 13 on the power regulator 2; the power adapter 1 further comprises a second cross-port 18 electrically connected to the power adapter control chip. When the tail cover 15 is covered on the power regulator 2 at the tail end 15, if one of the power regulators 2 is taken out in case that the power regulators 2 are multiple, in order to avoid the signal interruption of the subsequent power regulator 2 and the failure of working, the second cross interface 18 on the power adapter 1 is connected with the first cross interface 16 on the tail cover 15 through a direct connection network cable, so that the subsequent power regulator 2 continues to work, and after one of the power regulators 2 is taken out, the data transmission between the power adapter 1 and the subsequent power regulator 2 is disconnected, but because the second cross interface 18 on the power adapter 1 and the first cross interface 16 on the tail cover 15 are connected through the network cable, and the address of the subsequent power regulator 2 is unchanged, the normal working of the subsequent power regulator 2 can be ensured.
In this embodiment, as shown in fig. 9, the power regulator 2 includes a first housing 19, and a receiving cavity is formed in the first housing 19, so as to receive the aforementioned components and parts of the power regulator control chip, the optocoupler, the silicon controlled rectifier 5, the watchdog module, the PCB board 4, and the like. The top edge and the bottom edge of the first shell 19 facing one side wall of the power adapter 1 extend out of a first bulge 20 along the vertical direction, or the top edge and the bottom edge of the first shell 19 facing one side wall of the power adapter 1 are provided with a first U-shaped groove or a first C-shaped groove, and the opening directions of the groove bodies on the top edge and the bottom edge are opposite; the top edge and the bottom edge of the first shell 19, which deviate from one side wall of the power adapter 1, extend out of a second bulge along the vertical direction, or the top edge and the bottom edge of the first shell 19, which deviate from one side wall of the power adapter 1, are respectively provided with a second U-shaped groove 23 or a second C-shaped groove, and the opening directions of the groove bodies on the top edge and the bottom edge are oppositely arranged; a ventilation grille 24 is arranged on the top wall of the first shell 19, the ventilation grille 24 is opposite to one end of the cavity of the heat dissipation aluminum piece 9, a ventilation opening 25 is arranged on the bottom wall of the first shell 19, the ventilation opening 25 is opposite to the air supply piece 11, and by arranging the ventilation grille 24 and the ventilation opening 25, heat generated by the power regulator 2 can be rapidly discharged from the ventilation opening 25 and the ventilation grille 24 when the power regulator operates; the front wall of the first shell 19 is provided with the groove 26, the groove 26 is divided into a plurality of installation positions by a plurality of partition plates 27 arranged at intervals, the number of the installation positions is consistent with the total number of the load wiring terminals 3 and the strong current wiring terminals 8, the installation positions are in one-to-one correspondence, and the partition plates 27 are arranged to play an insulating role, so that short circuits caused by interference when adjacent wiring terminals are connected are avoided; the cover plate 28 is arranged at the notch of the groove 26, the cover plate 28 is rotatably connected to the groove wall of the groove 26, namely, fixed shafts 29 are respectively arranged on two opposite groove walls of the groove 26, a containing groove 30 for containing the fixed shafts 29 is arranged on the corresponding wall surface of the cover plate 28, the containing groove 30 is in clearance fit with the fixed shafts 29, the cover plate 28 can rotate relative to the groove 26 through the fit of the fixed shafts 29 on the groove wall of the groove 26 and the containing groove 30, and of course, the installation positions of the fixed shafts 29 and the containing groove 30 can also be adjusted, namely, the fixed shafts 29 are arranged on the cover plate 28, and the containing groove 30 is arranged on the groove wall of the groove 26; the two opposite groove walls of the groove 26 are respectively provided with a buckle 31, the corresponding wall surface of the cover plate 28 is provided with a clamping groove (not shown in the figure) for clamping the buckle 31, the cover plate 28 is clamped into the clamping groove through the buckle 31 to be fixed from rotating, and the installation positions of the buckle 31 and the clamping groove can be adjusted, namely, the buckle 31 is arranged on the cover plate 28, and the clamping groove is arranged on the groove wall of the groove 26; by providing the cover plate 28, the connection terminal inside the groove 26 can be protected, and the cover plate 28 is rotatable and clamped and fixed, so that the connection terminal and the connection wire are convenient to maintain.
In this embodiment, as shown in fig. 10, the power adapter 1 includes a second housing 32, and the second housing 32 also has a housing cavity therein for housing the aforementioned power adapter control chip and the like. The top edge and the bottom edge of the second housing 32 facing one side wall of the power regulator 2 extend out of a third protrusion along the vertical direction, or the top edge and the bottom edge of the second housing 32 facing one side wall of the power regulator 2 are both provided with a third U-shaped groove 17 or a third C-shaped groove, and the opening directions of the groove bodies on the top edge and the bottom edge are opposite.
When the power adapter 1 is spliced with the power regulator 2, if the side wall of the power adapter 1 is provided with a third U-shaped groove 17 or a third C-shaped groove, the corresponding side wall of the power regulator 2 spliced with the third U-shaped groove is provided with a first bulge 20, otherwise, if the side wall of the power adapter 1 is provided with a third bulge, the corresponding side wall of the power regulator 2 spliced with the third U-shaped groove or the first C-shaped groove is provided with a first U-shaped groove or a first C-shaped groove; the first protrusion 20 slides into the third U-shaped groove 17 or the third C-shaped groove body, so that the first protrusion and the third C-shaped groove are detachably spliced into a whole.
When a plurality of power regulators 2 are arranged, for example, two power regulators 2 are arranged in a splicing manner, the serial numbers of the adjacent power regulators 2 are respectively a first U-shaped groove 23 or a second C-shaped groove if the side wall of the first power regulator 2 facing the second power regulator 2 is provided with a first bulge 20 on the corresponding side wall of the second power regulator 2 spliced with the first U-shaped groove, whereas if the side wall of the first power regulator 2 facing the second power regulator 2 is provided with a second bulge, the side wall of the second power regulator 2 spliced with the second power regulator is provided with a first U-shaped groove or a first C-shaped groove; the first protrusion 20 slides into the second U-shaped groove 23 or the groove body of the second C-shaped groove, so that the two are detachably spliced into a whole.
In addition, the tail cap 15 and the adjacent power regulator 2 are spliced by adopting the matching of the protrusions and the grooves, so that the detachable splicing is realized, and the maintenance is convenient.
The invention also specifically provides an implementation mode of the industrial oven, which comprises an oven body, wherein the oven body can be arranged into a multi-layer structure, each layer can be provided with at least one independent oven cavity, one oven cavity is a monitored area, a plurality of temperature points are set in each oven cavity, and a carrier for containing products to be baked is arranged in each oven cavity; the temperature control system is also included; the temperature acquisition part in the temperature control system is connected to the carrier or the inner wall of the furnace chamber, when the temperature acquisition part is a temperature acquisition plate, the temperature acquisition plate is connected to the carrier, and when the temperature acquisition part is a temperature sensor, the temperature sensor is connected to the inner wall of the furnace chamber; the heating element is arranged in the furnace chamber; when the temperature is acquired by adopting the temperature acquisition plate in the furnace chamber, the temperature acquisition plate is clamped on the bottom surface of the carrier and enters and exits the furnace chamber along with the carrier; when the temperature sensor is directly adopted in the furnace chamber to collect the temperature, the temperature sensor is arranged at a plurality of temperature points in the furnace chamber and is connected to the temperature control host. The temperature control host and the power regulator component in the temperature control system are positioned outside the oven body. In addition, the temperature control system has all the beneficial technical effects brought by the temperature control system, and the detailed description is omitted.
In this application, unless expressly stated or limited otherwise, a first feature "up" or "down" a second feature may be the first and second features in direct contact, or the first and second features in indirect contact via an intervening medium. Moreover, a first feature being "above," "over" and "on" a second feature may be a first feature being directly above or obliquely above the second feature, or simply indicating that the first feature is level higher than the second feature. The first feature being "under", "below" and "beneath" the second feature may be the first feature being directly under or obliquely below the second feature, or simply indicating that the first feature is less level than the second feature.
In the description of the present specification, a description referring to the terms "preferred embodiment," "further embodiment," "other embodiments," or "specific examples," etc., means that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the present application. In this specification, schematic representations of the above terms are not necessarily directed to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples. Furthermore, the different embodiments or examples described in this specification and the features of the different embodiments or examples may be combined and combined by those skilled in the art without contradiction.
Although embodiments of the present application have been shown and described above, it will be understood that the above embodiments are illustrative and not to be construed as limiting the application, and that variations, modifications, alternatives, and variations may be made to the above embodiments by one of ordinary skill in the art within the scope of the application.
Claims (10)
1. The utility model provides a temperature control system, includes temperature control host computer, its characterized in that: the system also comprises at least one group of power regulator components and a temperature acquisition component;
the temperature acquisition part is used for acquiring the temperature in real time and transmitting the acquired real-time temperature information to the temperature control host;
the temperature control host is used for receiving the real-time temperature information transmitted by the temperature acquisition part, comparing the received real-time temperature information with a preset target temperature, sending a command to the power regulator assembly to perform power-off processing on the corresponding heating part if the real-time temperature information is higher than the target temperature, and sending a command to the power regulator assembly to perform power-on processing on the corresponding heating part if the real-time temperature information is lower than the target temperature;
the power regulator component is used for receiving an instruction sent by the temperature control host computer so as to enable the corresponding heating element to be powered on and off;
Wherein the power regulator assembly comprises a power adapter in communication with the temperature control host and at least one power regulator in communication with the power adapter; the power regulator comprises a power regulator control chip and a plurality of thyristors electrically connected with the power regulator control chip, wherein the power regulator control chip is in communication connection with the power adapter, the thyristors are arranged in parallel, and each thyristor is also electrically connected with a load connecting terminal; the power adapter sends the power on-off instruction to a power regulator control chip in the corresponding power regulator, and the power regulator control chip in the power regulator controls the corresponding silicon controlled rectifier to be powered on and powered off according to the instruction transmitted by the power adapter.
2. The temperature control system of claim 1, wherein: the temperature control host obtains output power output to the corresponding heating element through a PID algorithm according to the received real-time temperature information and the preset target temperature of the corresponding heating element, and sends the output power to a power adapter in the corresponding power regulator assembly in a PWM duty ratio control mode, and the power adapter controls corresponding controllable silicon controlled by the corresponding power regulator to be uniformly powered on and off in unit time according to a received output power instruction so as to control the corresponding heating element to be uniformly powered on and off in unit time.
3. The temperature control system of claim 2, wherein: the times of on-off of all the thyristors in unit time form a matrix, and the on-off time points of adjacent thyristors in the matrix are arranged in a staggered manner.
4. A temperature control system according to any one of claims 1-3, characterized in that: the power regulator comprises two mutually connected PCB boards, wherein the two PCB boards are connected through a pin header, a bus header or copper columns and screws, the power regulator control chip and a plurality of thyristors are arranged on one PCB board, and the load wiring terminal is arranged on the other PCB board;
and/or the plurality of thyristors are arranged in a double-row interval mode, a heat dissipation aluminum piece is arranged between the two rows of thyristors, and each thyristor is tightly attached to the heat dissipation aluminum piece.
5. The temperature control system of claim 4, wherein: a plurality of first optocouplers are arranged on a PCB provided with the thyristors, the number of the first optocouplers is the same as that of the thyristors, and each thyristor is connected with one first optocoupler in series;
and/or a plurality of fuses are arranged on the PCB provided with the load connecting terminals, the number of the fuses is the same as that of the thyristors, and one fuse is connected in series between each thyristor and the load connecting terminal;
And/or a strong electric wiring terminal is also arranged on the PCB provided with the load wiring terminal, the strong electric wiring terminal is respectively connected with each silicon controlled rectifier in series, and the strong electric wiring terminal is also connected with a 220V power supply in series;
and/or the heat dissipation aluminum piece is square, a cavity is formed in the heat dissipation aluminum piece, two ends of the cavity penetrate through two ends of the heat dissipation aluminum piece, a plurality of heat dissipation fins are arranged on the inner wall of the cavity at intervals, and heat dissipation channels are formed between adjacent heat dissipation fins;
and/or an air supply piece is arranged at one port of the heat dissipation aluminum piece, and the air supply piece is electrically connected with the power regulator control chip; the air supply piece is also provided with a temperature sensor which is electrically connected with the power regulator control chip; and/or a current sampling element is connected in series between the air supply piece and the power regulator control chip.
6. The temperature control system of claim 5, wherein: the PCB provided with the first optocouplers is also provided with a plurality of second optocouplers, the plurality of second optocouplers are arranged in parallel, one second optocoupler is electrically connected to the strong electric wiring terminal, the other second optocouplers are respectively electrically connected to the load wiring terminal, and resistors are also connected in series between one second optocoupler and the strong electric wiring terminal and between the other second optocouplers and the corresponding load wiring terminals; all the second optocouplers are electrically connected to the power regulator control chip;
And/or the power regulator assembly further comprises a watchdog module, wherein the watchdog module is connected in series with a circuit formed by connecting a plurality of first optocouplers in parallel, and is further electrically connected to the power regulator control chip.
7. The temperature control system of claim 6, wherein: all the second optocouplers are electrically connected with a latch and are electrically connected to the power regulator control chip through the latch.
8. The temperature control system of claim 1, wherein: the power adapter comprises a power adapter control chip, the power adapter control chip is in communication connection with a power regulator control chip, the power adapter further comprises a first splicing terminal electrically connected with the power adapter control chip, the power regulator further comprises a third splicing terminal and a second splicing terminal electrically connected with the power regulator control chip, when the power regulator is provided with one power regulator, the first splicing terminal on the power adapter is electrically connected with the second splicing terminal on the power regulator, when the power regulator is provided with a plurality of power regulators, the first splicing terminal on the power adapter is electrically connected with the second splicing terminal on the adjacent power regulator, and the second splicing terminal of the adjacent power regulator is electrically connected with the third splicing terminal.
9. The temperature control system of claim 8, wherein: a tail cover is covered on the power regulator positioned at the tail end, a first span interface and a fourth splicing terminal are arranged on the tail cover, and the fourth splicing terminal is electrically connected with a third splicing terminal on the power regulator; the power adapter also includes a second cross-interface electrically connected to the power adapter control chip.
10. An industrial oven comprises an oven body, wherein a plurality of independent oven chambers are arranged in the oven body, and a carrier for containing products to be baked is arranged in each oven chamber; the method is characterized in that: further comprising a temperature control system according to any of claims 1-9; the temperature acquisition part in the temperature control system is connected to the carrier or the inner wall of the furnace chamber; the heating element is arranged in the furnace chamber.
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| Application Number | Priority Date | Filing Date | Title |
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| CN202311793490.0A CN117812860A (en) | 2023-12-25 | 2023-12-25 | Temperature control system and industrial oven |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202311793490.0A CN117812860A (en) | 2023-12-25 | 2023-12-25 | Temperature control system and industrial oven |
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