Integrated temperature control device and injection molding machine

Abstract

The utility model discloses an integrated temperature control device and an injection molding machine, which are applied to the field of injection molding machine control. In the device, a communication module is connected with a controller and a core control module; the temperature acquisition module is connected with the thermocouple and the core control module; the temperature control module is connected with the core control module and the heating coil control part; the heating coil control part is also connected with the protection module and the heating coil; the protection module is also connected with the power supply. Therefore, according to the integrated temperature control device provided by the invention, the thermocouple and the heating coil are controlled through the communication module, the core control module, the temperature acquisition module and the temperature control module, and the whole device is controlled and the current and voltage are detected through the heating coil control part and the protection module; the functions of temperature acquisition, control, protection, energy consumption metering, communication and the like are integrated, the functions are rich, and the safety coefficient is high.

Description

Technical Field

[0001] The utility model relates to the field of injection molding machine control, in particular to an integrated temperature control device and an injection molding machine. Background Art

[0002] In the application of injection molding machines, the temperature sampling and control of the barrel of traditional injection molding machines are completed by the temperature sampling control module and the heating coil control component (contactor or solid-state relay) in the injection molding machine controller. They are all located in the electrical control box of the injection molding machine. The injection molding machine manufacturer will install a transfer box next to the barrel of the machine, such as Figure 1 As shown, there are an electric control box 21 and a transfer box 22, and its functional layout is as follows Figure 2 As shown, the electric control box 21 contains a controller temperature acquisition control module 23, a circuit breaker 24, a fuse 25, and a contactor or a solid-state relay 26; the entire layout diagram also includes a heating coil 27 and a thermocouple 28.

[0003] The traditional connection between the electric control box, the transfer box, the heating coil and the thermocouple can only control the heating coil and the thermocouple through the electric control box, which has a single function and cannot guarantee the safety of the use process. The overall safety factor is low, the function is lacking, and the connection process requires complex and large number of connecting wires, which requires more assembly time and high material costs.

[0004] In view of the above technology, seeking an integrated temperature control device is an urgent problem to be solved by those skilled in the art. Utility Model Content

[0005] The purpose of the utility model is to provide an integrated temperature control device and an injection molding machine, which can solve the problems of single function and low safety factor brought about by the electric control box and the adapter box in the prior art, and at the same time solve the problems of complex and large number of connecting wires between the electric control box, the adapter box and the heating coil and the thermocouple, long assembly hours and high material costs.

[0006] In order to solve the above technical problems, the utility model provides an integrated temperature control device, including: a communication module, a core control module, a temperature acquisition module, a temperature control module, a heating coil control component and a protection module;

[0007] Wherein, the input end of the communication module is connected to the controller, and the output end of the communication module is connected to the first input end of the core control module;

[0008] The input end of the temperature acquisition module is connected to the thermocouple, and the output end of the temperature acquisition module is connected to the second input end of the core control module;

[0009] The input end of the temperature control module is connected to the output end of the core control module, and the output end of the temperature control module is connected to the first input end of the heating coil control component;

[0010] The second input end of the heating coil control component is connected to the first output end of the protection module, the third input end of the heating coil protection component is connected to the first input end of the protection module, and the first output end of the heating coil protection component is connected to the heating coil;

[0011] The second input terminal of the protection module is connected to the power supply.

[0012] Preferably, the temperature acquisition module comprises: a thermocouple signal acquisition filter circuit, a signal selection amplification circuit and an analog-to-digital conversion circuit;

[0013] Wherein, the input end of the thermocouple signal acquisition filter circuit is connected to the thermocouple, and the output end of the thermocouple signal acquisition filter circuit is connected to the input end of the signal selection amplifier circuit;

[0014] The output end of the signal selection amplifier circuit is connected to the input end of the analog-to-digital conversion circuit;

[0015] The output end of the analog-to-digital conversion circuit is connected to the second input end of the core control module.

[0016] Preferably, the temperature acquisition module further includes: a first isolation circuit;

[0017] The input end of the first isolation circuit is connected to the output end of the analog-to-digital conversion circuit, and the output end of the first isolation circuit is connected to the second input end of the core control module.

[0018] Preferably, the temperature control module comprises: a second isolation circuit and a temperature control circuit;

[0019] Wherein, the input end of the second isolation circuit is connected to the output end of the core control module, and the output end of the second isolation circuit is connected to the input end of the temperature control circuit;

[0020] The output end of the temperature control circuit is connected to the first input end of the heating coil control component.

[0021] Preferably, the protection module includes a passive protection circuit and a detection active protection circuit;

[0022] Wherein, the input end of the passive protection circuit is connected to the power supply, and the first output end of the passive protection circuit is connected to the second input end of the heating coil control component;

[0023] The input end of the detection active protection circuit is connected to the second output end of the heating coil control component, and the output end of the detection active protection circuit is connected to the third input end of the heating coil control component.

[0024] Preferably, it also includes: a DC / DC circuit;

[0025] Wherein, the input end of the DC / DC circuit is connected to the second output end of the passive protection circuit.

[0026] Preferably, the thermocouple signal acquisition filter circuit includes: a low-pass filter and a clamping protection circuit;

[0027] Wherein, the input end of the low-pass filter is connected to the output end of the thermocouple, and the output end of the low-pass filter is connected to the input end of the signal selection amplifier circuit;

[0028] The clamp protection circuit includes a positive clamp and a negative clamp, the output end of the positive clamp is connected to the positive output end of the power supply, the input end of the positive clamp is connected to the input end of the thermocouple, the output end of the negative clamp is connected to the output end of the thermocouple, and the input end of the negative clamp is connected to the negative output end of the power supply.

[0029] Preferably, the signal selection amplification circuit comprises: a cold-end temperature compensation circuit and a precision amplifier;

[0030] Wherein, the input end of the cold-end temperature compensation circuit is connected to the output end of the thermocouple signal acquisition filter circuit, and the output end of the cold-end temperature compensation circuit is connected to the input end of the precision amplifier;

[0031] The output end of the precision amplifier is connected to the input end of the analog-to-digital conversion circuit.

[0032] Preferably, the core control module is an embedded processor.

[0033] In order to solve the above technical problems, the present application also provides an injection molding machine, including the above integrated temperature control device.

[0034] The utility model provides an integrated temperature control device, comprising: a communication module, a core control module, a temperature acquisition module, a temperature control module, a heating coil control component and a protection module; wherein, the input end of the communication module is connected to the controller, and the output end of the communication module is connected to the first input end of the core control module; the input end of the temperature acquisition module is connected to the thermocouple, and the output end of the temperature acquisition module is connected to the second input end of the core control module; the input end of the temperature control module is connected to the output end of the core control module, and the output end of the temperature control module is connected to the first input end of the heating coil control component; the second input end of the heating coil control component is connected to the first output end of the protection module, the third input end of the heating coil protection component is connected to the first input end of the protection module, and the first output end of the heating coil protection component is connected to the heating coil; the second input end of the protection module is connected to the power supply. It can be seen that the integrated temperature control device provided in the present application controls the thermocouple and the heating coil through the communication module, the core control module, the temperature acquisition module and the temperature control module, and controls the overall device and detects the current and voltage through the heating coil control component and the protection module, and integrates the functions of temperature acquisition, control, protection, energy consumption metering, communication, etc., with rich functions and high safety factor. BRIEF DESCRIPTION OF THE DRAWINGS

[0035] In order to more clearly illustrate the embodiments of the present utility model, the following is a brief introduction to the drawings required for use in the embodiments. Obviously, the drawings described below are only some embodiments of the present utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0036] Figure 1 It is a schematic diagram of an injection molding machine in the prior art;

[0037] Figure 2 It is a functional layout diagram of an injection molding machine in the prior art;

[0038] Figure 3 A module diagram of an integrated temperature control device provided in an embodiment of the present application;

[0039] Figure 4 A layout diagram of an integrated temperature control device provided in an embodiment of the present application;

[0040] Figure 5 A module diagram of a specific integrated temperature control device provided in an embodiment of the present application. DETAILED DESCRIPTION

[0041] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of them. Based on the embodiments of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the protection scope of the utility model.

[0042] The core of the utility model is to provide an integrated temperature control device and an injection molding machine.

[0043] In order to enable those skilled in the art to better understand the present invention, the present invention is further described in detail below in conjunction with the accompanying drawings and specific implementation methods.

[0044] Figure 3 A module diagram of an integrated temperature control device provided in an embodiment of the present application includes: a communication module 1, a core control module 2, a temperature acquisition module 3, a temperature control module 4, a heating coil control component 5 and a protection module 6; as well as a controller 7, a thermocouple 8, a heating coil 9, and a power supply 10. The specific connection relationship is: the input end of the communication module 1 is connected to the controller 7, and the output end of the communication module 1 is connected to the first input end of the core control module 2; the input end of the temperature acquisition module 3 is connected to the thermocouple 8, and the output end of the temperature acquisition module 3 is connected to the second input end of the core control module 2; the input end of the temperature control module 4 is connected to the output end of the core control module 2, and the output end of the temperature control module 4 is connected to the first input end of the heating coil control component 5; the second input end of the heating coil control component 5 is connected to the first output end of the protection module 6, the third input end of the heating coil protection component 5 is connected to the first input end of the protection module 6, and the first output end of the heating coil protection component 6 is connected to the heating coil 9; the second input end of the protection module 6 is connected to the power supply 10.

[0045] In this device, a communication module 1, a core control module 2, a temperature acquisition module 3, a temperature control module 4, a heating coil control component 5 and a protection module 6 are integrated as a temperature control device. Data is transmitted with the controller 7 via the communication module 1, the temperature of the thermocouple 8 is acquired via the temperature acquisition module 3, and the temperature information is transmitted to the core control module 2. The core control module 2 controls the temperature control module 4 by acquiring information transmitted with the controller 7 and the temperature information of the thermocouple 8 acquired by the temperature acquisition module 3, so as to further control the heating coil 9. During this process, the heating coil protection component 5 protects the control process and the heating coil 9, and the protection module 6 detects the voltage and current information of the overall device to avoid malfunction of the integrated temperature control device.

[0046] like Figure 4As shown, the placement position of the integrated temperature control device is the placement position of the original transfer box, which can reduce the number of connecting wires, reduce assembly time and material costs. For example: when the barrel has 6 temperature sections, the distance between the electric control box and the transfer box is 4 meters, and the distance between the transfer box and the heating coil and the thermocouple is also 4 meters, the number of connecting wires required is calculated as follows: (2+2)*6=24, that is, 24 4-meter-long connecting wires are required; and the integrated temperature control device provided by the present application, when the placement position of the integrated temperature control device is the placement position of the original transfer box, the barrel has 6 temperature sections, the distance between the electric control box and the integrated temperature control device is 4 meters, and the distance between the integrated temperature control device and the heating coil and the thermocouple is also 4 meters, the number of connecting wires required is calculated as follows: 3+1=4, that is, 4 4-meter-long connecting wires are required. On the whole, the present application reduces the number of connecting wires, reduces assembly time and complexity, and reduces material costs.

[0047] As a preferred embodiment, the core control module 2 adopts an embedded processor.

[0048] Among them, it should be noted that the specific internal structures of the communication module 1, core control module 2, temperature acquisition module 3, temperature control module 4, heating coil control component 5 and protection module 6 are not limited in this application and can be set according to user needs.

[0049] The present application provides an integrated temperature control device, comprising: a communication module, a core control module, a temperature acquisition module, a temperature control module, a heating coil control component and a protection module;

[0050] Among them, the input end of the communication module is connected to the controller, and the output end of the communication module is connected to the first input end of the core control module; the input end of the temperature acquisition module is connected to the thermocouple, and the output end of the temperature acquisition module is connected to the second input end of the core control module; the input end of the temperature control module is connected to the output end of the core control module, and the output end of the temperature control module is connected to the first input end of the heating coil control component; the second input end of the heating coil control component is connected to the first output end of the protection module, the third input end of the heating coil protection component is connected to the first input end of the protection module, and the first output end of the heating coil protection component is connected to the heating coil; the second input end of the protection module is connected to the power supply. It can be seen that the integrated temperature control device provided by the present application controls the thermocouple and the heating coil through the communication module, the core control module, the temperature acquisition module and the temperature control module, and controls the overall device and detects the current and voltage through the heating coil control component and the protection module, and integrates the functions of temperature acquisition, control, protection, energy consumption metering, communication, etc., with rich functions and high safety factor.

[0051] Based on the above embodiments, as a preferred embodiment, Figure 5 As shown, the temperature acquisition module 3 includes: a thermocouple signal acquisition filter circuit 31, a signal selection amplifier circuit 32, an analog-to-digital conversion circuit 33 and a first isolation circuit 34. The connection relationship is: the input end of the thermocouple signal acquisition filter circuit 31 is connected to the thermocouple 8, the output end of the thermocouple signal acquisition filter circuit 31 is connected to the input end of the signal selection amplifier circuit 32; the output end of the signal selection amplifier circuit 32 is connected to the input end of the analog-to-digital conversion circuit 33; the output end of the analog-to-digital conversion circuit 33 is connected to the input end of the first isolation circuit 34, and the output end of the first isolation circuit 34 is connected to the second input end of the core control module 2. Among them, Figure 5 A1-A3 in hereinafter represent the first input / output terminal to the third input / output terminal.

[0052] Among them, the temperature acquisition module 3 is mainly composed of four parts: a thermocouple signal acquisition filter circuit 31, a signal selection amplifier circuit 32, an analog-to-digital conversion circuit (A / D circuit) 33 and a first isolation circuit 34. Among them, the thermocouple signal acquisition filter circuit 31 is composed of two parts: a low-pass filter and a clamp protection circuit, wherein the input end of the low-pass filter is connected to the output end of the thermocouple 8, and the output end of the low-pass filter is connected to the input end of the signal selection amplifier circuit 32; the clamp protection circuit includes a positive clamp and a negative clamp, the output end of the positive clamp is connected to the positive output end of the power supply 10, and the input end of the positive clamp is connected to the input end of the thermocouple 8; the output end of the negative clamp is connected to the output end of the thermocouple 8, and the input end of the negative clamp is connected to the negative output end of the power supply 10. The signal amplification circuit 32 is composed of a cold-end temperature compensation circuit and a precision amplifier, wherein the input end of the cold-end temperature compensation circuit is connected to the output end of the thermocouple signal acquisition filter circuit 31, and the output end of the cold-end temperature compensation circuit is connected to the input end of the precision amplifier; the output end of the precision amplifier is connected to the input end of the analog-to-digital conversion circuit 33. As a whole, the signal of the thermocouple 8 is connected to the thermocouple signal acquisition filter circuit 31 through the wiring terminal, and the thermocouple signal acquisition filter circuit 31 is composed of a low-pass filter and a clamping protection circuit to filter out high-frequency interference and abnormal over-limit damage levels during the operation of the device. The signal selection amplifier circuit 32 is composed of a cold-end temperature compensation circuit and a precision amplifier, which compensates and amplifies the weak input voltage signal of the thermocouple 8 and outputs a voltage signal of 10mV / ℃. The analog-to-digital conversion circuit 33 (A / D circuit) converts the received analog signal into a digital signal that can be processed by the micro control unit (MCU), and then enters the core control module 2 through the first isolation circuit 34. Among them, the first isolation circuit 34 is used to isolate multiple groups of digital signals to prevent mutual interference.

[0053] It should be noted that this application is only one possible implementation method, but is not limited to this implementation method and can be set according to user needs.

[0054] At the same time, it should be noted that the thermocouple signal acquisition filter circuit 31, signal selection amplifier circuit 32, analog-to-digital conversion circuit 33 and first isolation circuit 34 provided in the present application are all common circuits and will not be elaborated in this application.

[0055] The present application provides a specific structure of a temperature acquisition module. According to the structure provided by the present application, the signal of the thermocouple is first collected and filtered, and then amplified, and finally the signal of the thermocouple is transmitted to the core control module through a first isolation circuit, so that the core control module controls the temperature control module according to the current thermocouple signal and the information transmitted through the communication circuit and the controller.

[0056] Based on the above embodiments, as a preferred embodiment, Figure 5 As shown, the temperature control module 4 includes: a second isolation circuit 41 and a temperature control circuit 42. The connection relationship of the circuit is: the input end of the second isolation circuit 41 is connected to the output end of the core control module 2, the output end of the second isolation circuit 41 is connected to the input end of the temperature control circuit 42; the output end of the temperature control circuit 42 is connected to the first input end of the heating coil control component 5.

[0057] Among them, the temperature control module 4 is composed of a second isolation circuit 41 and a temperature control circuit 42. The controller that communicates with the core control module 2 through the communication circuit in the communication module 1 pre-sets the temperature target value or control state, and then transmits it to the core control module 2 through the communication bus (CAN, Ethernet, etc.). The core control module 2 adopts an embedded processor, and a temperature control algorithm is embedded inside. The temperature of the thermocouple 8 collected by the temperature acquisition module 3 is compared and calculated with the temperature target value transmitted by the communication, and the control state is given to the temperature control circuit 42 through the second isolation circuit 41. The temperature control circuit 42 drives the thyristor of the heating coil control component 5 after internal power amplification of the digital signal output by the MCU. The thyristor can control the power required at both ends of the heating coil to control the temperature.

[0058] It should be noted that this application is only one possible implementation method, but is not limited to this implementation method and can be set according to user needs.

[0059] At the same time, it should be noted that the second isolation circuit 41 and the temperature control circuit 42 provided in the present application are both common circuits and will not be described in detail in the present application.

[0060] The present application provides a specific structure of a temperature control module. According to the structure provided by the present application, the temperature target value preset by the controller is first obtained, and then compared with the temperature of the thermocouple collected by the temperature acquisition module. Then, the current comparison result, that is, the control state is sent to the thyristor of the heating coil control component through the second isolation circuit and the temperature control circuit, thereby playing the function of controlling the temperature.

[0061] Based on the above embodiments, as a preferred embodiment, Figure 5 As shown, the protection module 6 includes a passive protection circuit 61 and a detection active protection circuit 62. The connection relationship of the circuit is: the input end of the passive protection circuit 61 is connected to the power supply 10, and the first output end of the passive protection circuit 61 is connected to the second input end of the heating coil control component 5; the input end of the detection active protection circuit 62 is connected to the second output end of the heating coil control component 5, and the output end of the detection active protection circuit 62 is connected to the third input end of the heating coil control component 5.

[0062] Among them, the protection module 6 is mainly divided into a passive protection circuit 61 and a detection active protection circuit 62. Among them, the passive protection circuit 61 contains fast melting devices, varistors, EMC capacitor devices, etc., which protect the input power supply of the entire device from overvoltage, overcurrent and abnormal interference. The detection active protection circuit 62 includes detecting each voltage and current, and real-time detection of the output state of the thyristor in the heating coil control component and the output voltage and current. Among them, the voltage detection uses the voltage division principle to compare and detect the voltage after the high voltage is divided with the low voltage signal detected by the core control module 2; the current detection uses the Hall principle to detect the instantaneous current passing through the device, and the current corresponding to the low voltage signal output of the core control module 2. At the same time, the protection module 6 controls the output of abnormal output and / or overvoltage and overcurrent, and feeds it back to the core control module 2, thereby shutting down the output or transmitting the abnormal state alarm back to the controller 7 and making abnormal reminders to prevent safety accidents. In addition, the core control module 2 and the MCU use the instantaneous voltage and current detected in the detection active protection circuit 62, and combine the control state to perform energy consumption statistics on the instantaneous power of each output. At the same time, if Figure 5 As shown, it also includes a DC / DC circuit 11, and the connection relationship of the circuit is: the input end of the DC / DC circuit is connected to the second output end of the passive protection circuit. The DC / DC circuit generates the power required by the entire device through the power input as the internal power supply of the device.

[0063] An integrated temperature control device provided by the present application includes: a communication module, a core control module, a temperature acquisition module, a temperature control module, a heating coil control component and a protection module; wherein, the input end of the communication module is connected to the controller, and the output end of the communication module is connected to the first input end of the core control module; the input end of the temperature acquisition module is connected to the thermocouple, and the output end of the temperature acquisition module is connected to the second input end of the core control module; the input end of the temperature control module is connected to the output end of the core control module, and the output end of the temperature control module is connected to the first input end of the heating coil control component; the second input end of the heating coil control component is connected to the first output end of the protection module, the third input end of the heating coil protection component is connected to the first input end of the protection module, and the first output end of the heating coil protection component is connected to the heating coil; the second input end of the protection module is connected to the power supply. It can be seen that the integrated temperature control device provided in the present application controls the thermocouple and the heating coil through the communication module, the core control module, the temperature acquisition module and the temperature control module, and controls the overall device and detects the current and voltage through the heating coil control component and the protection module, and integrates the functions of temperature acquisition, control, protection, energy consumption metering, communication, etc., with rich functions and high safety factor.

[0064] To solve the above technical problems, the present application also provides an injection molding machine, including the above integrated temperature control device, and having the same beneficial effects. Its specific embodiments are the same as the corresponding embodiments of the above integrated temperature control device, and the present application will not repeat them.

[0065] The above is a detailed introduction to an integrated temperature control device and an injection molding machine provided by the utility model. The various embodiments in the specification are described in a progressive manner, and each embodiment focuses on the differences from other embodiments. The same and similar parts between the various embodiments can be referenced to each other. For the device disclosed in the embodiment, since it corresponds to the method disclosed in the embodiment, the description is relatively simple, and the relevant parts can be referred to the method part description. It should be pointed out that for ordinary technicians in this technical field, without departing from the principle of the utility model, the utility model can also be improved and modified in a number of ways, and these improvements and modifications also fall within the scope of protection of the claims of the utility model.

[0066] It should also be noted that, in this specification, relational terms such as first and second, etc. are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "comprise", "include" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device. In the absence of further restrictions, an element defined by the statement "comprises a ..." does not exclude the presence of other identical elements in the process, method, article or device including the element.

Claims

1. An integrated temperature control device, characterized in that: include: Communication module, core control module, temperature acquisition module, temperature control module, heating coil control component and protection module; Wherein, the input end of the communication module is connected to the controller, and the output end of the communication module is connected to the first input end of the core control module; The input end of the temperature acquisition module is connected to the thermocouple, and the output end of the temperature acquisition module is connected to the second input end of the core control module; The input end of the temperature control module is connected to the output end of the core control module, and the output end of the temperature control module is connected to the first input end of the heating coil control component; The second input end of the heating coil control component is connected to the first output end of the protection module, the third input end of the heating coil control component is connected to the first input end of the protection module, and the first output end of the heating coil control component is connected to the heating coil; The second input terminal of the protection module is connected to a power source.

2. The integrated temperature control device according to claim 1, characterized in that: The temperature acquisition module includes: a thermocouple signal acquisition filter circuit, a signal selection amplification circuit and an analog-to-digital conversion circuit; Wherein, the input end of the thermocouple signal acquisition and filtering circuit is connected to the thermocouple, and the output end of the thermocouple signal acquisition and filtering circuit is connected to the input end of the signal selection and amplification circuit; The output end of the signal selection amplifier circuit is connected to the input end of the analog-to-digital conversion circuit; The output end of the analog-to-digital conversion circuit is connected to the second input end of the core control module.

3. The integrated temperature control device according to claim 2, characterized in that: The temperature acquisition module further includes: a first isolation circuit; The input end of the first isolation circuit is connected to the output end of the analog-to-digital conversion circuit, and the output end of the first isolation circuit is connected to the second input end of the core control module.

4. The integrated temperature control device according to claim 1, characterized in that: The temperature control module includes: a second isolation circuit and a temperature control circuit; Wherein, the input end of the second isolation circuit is connected to the output end of the core control module, and the output end of the second isolation circuit is connected to the input end of the temperature control circuit; The output end of the temperature control circuit is connected to the first input end of the heating coil control component.

5. The integrated temperature control device according to claim 1, characterized in that: The protection module includes a passive protection circuit and a detection active protection circuit; Wherein, the input end of the passive protection circuit is connected to the power supply, and the first output end of the passive protection circuit is connected to the second input end of the heating coil control component; The input end of the detection active protection circuit is connected to the second output end of the heating coil control component, and the output end of the detection active protection circuit is connected to the third input end of the heating coil control component.

6. The integrated temperature control device according to claim 5, characterized in that: Also includes: DC / DC circuit; Wherein, the input end of the DC / DC circuit is connected to the second output end of the passive protection circuit.

7. The integrated temperature control device according to claim 2, characterized in that: The thermocouple signal acquisition filter circuit includes: a low-pass filter and a clamping protection circuit; Wherein, the input end of the low-pass filter is connected to the output end of the thermocouple, and the output end of the low-pass filter is connected to the input end of the signal selection amplifier circuit; The clamp protection circuit includes a positive clamp and a negative clamp, the output end of the positive clamp is connected to the positive output end of the power supply, and the input end of the positive clamp is connected to the input end of the thermocouple; the output end of the negative clamp is connected to the output end of the thermocouple, and the input end of the negative clamp is connected to the negative output end of the power supply.

8. The integrated temperature control device according to claim 2, characterized in that: The signal selection amplification circuit comprises: a cold end temperature compensation circuit and a precision amplifier; Wherein, the input end of the cold-end temperature compensation circuit is connected to the output end of the thermocouple signal acquisition filter circuit, and the output end of the cold-end temperature compensation circuit is connected to the input end of the precision amplifier; The output end of the precision amplifier is connected to the input end of the analog-to-digital conversion circuit.

9. The integrated temperature control device according to any one of claims 1 to 8, characterized in that: The core control module is an embedded processor.

10. An injection molding machine, characterized in that: An integrated temperature control device comprising any one of claims 1 to 9.

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