CN214927137U - Nozzle module of three-dimensional printing equipment and three-dimensional printing equipment - Google Patents
Nozzle module of three-dimensional printing equipment and three-dimensional printing equipment Download PDFInfo
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- CN214927137U CN214927137U CN202121492839.3U CN202121492839U CN214927137U CN 214927137 U CN214927137 U CN 214927137U CN 202121492839 U CN202121492839 U CN 202121492839U CN 214927137 U CN214927137 U CN 214927137U
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Abstract
The utility model provides a three-dimensional printing apparatus's nozzle module and three-dimensional printing apparatus, include: a nozzle assembly; the temperature measuring system comprises a temperature measuring module and a data processing module, wherein the temperature measuring module comprises a temperature detecting circuit and a data processing module, the temperature detecting circuit comprises a power supply, a first voltage division element, a second voltage division element, a third voltage division element and a thermosensitive voltage division element, and the first end of the first voltage division element is electrically connected with the positive electrode of the power supply; the second end of the first voltage division element is electrically connected with the data processing module and the first end of the second voltage division element; the second end of the second voltage division element is grounded; the first end of the third voltage division element is electrically connected with the first end of the first voltage division element and the positive electrode of the power supply, and the second end of the third voltage division element is electrically connected with the data processing module and the first end of the thermosensitive voltage division element; the second end of the thermosensitive voltage-dividing element is electrically connected with the second end of the second voltage-dividing element; the thermosensitive voltage-dividing element is connected with the nozzle assembly. The utility model discloses can solve the lower problem of nozzle module's temperature measurement accuracy.
Description
Technical Field
The utility model relates to a three-dimensional printing technical field especially relates to a three-dimensional printing equipment's nozzle module and three-dimensional printing equipment.
Background
The temperature of the nozzle of the three-dimensional printing device has an important influence on the discharging speed and the discharging quality of the three-dimensional printing device, so that the temperature of the nozzle needs to be measured and controlled in real time.
The current measuring circuit usually adopts a mode of connecting a voltage dividing element and a thermosensitive voltage dividing element in series, and the temperature of the nozzle is obtained by calculating through measuring the terminal voltage value of the thermosensitive voltage dividing element. However, in the actual measurement process, on the one hand, the voltage across the voltage dividing element changes due to the changes of the external temperature and the self temperature. On the other hand, external electromagnetic interference and electromagnetic interference generated by the three-dimensional printing device can also cause voltage variation between two ends of the voltage dividing element, thereby affecting the accuracy of the measurement result.
SUMMERY OF THE UTILITY MODEL
An object of the embodiment of the application is to provide a nozzle module of a three-dimensional printing device and the three-dimensional printing device, and the problem that the temperature measurement accuracy of the nozzle module of the current three-dimensional printing device is low is solved.
In order to achieve the above object, in a first aspect, an embodiment of the present invention provides a nozzle module of a three-dimensional printing apparatus, including:
a nozzle assembly;
the temperature measuring system comprises a temperature measuring module and a data processing module, wherein the temperature measuring module comprises a temperature detecting circuit and a data processing module, the temperature detecting circuit comprises a power supply, a first voltage division element, a second voltage division element, a third voltage division element and a thermosensitive voltage division element, and the first end of the first voltage division element is electrically connected with the positive pole of the power supply; the second end of the first voltage division element is electrically connected with the data processing module and the first end of the second voltage division element respectively; the second end of the second voltage division element is grounded; the first end of the third voltage division element is respectively and electrically connected with the first end of the first voltage division element and the anode of the power supply, and the second end of the third voltage division element is respectively and electrically connected with the data processing module and the first end of the thermosensitive voltage division element; the second end of the thermosensitive voltage-dividing element is electrically connected with the second end of the second voltage-dividing element; the temperature sensing voltage division element is connected with the nozzle assembly, the temperature sensing voltage division element is used for correspondingly changing the resistance value according to the change of the temperature of the nozzle assembly, and the temperature detection circuit is used for sending a corresponding electric signal according to the resistance value of the temperature sensing voltage division element; the data processing module is used for determining the corresponding temperature according to the electric signal.
Alternatively, the resistance value of the first voltage-dividing element, the resistance value of the second voltage-dividing element, and the resistance value of the third voltage-dividing element are all the same.
Optionally, the temperature measurement system further comprises a circuit board, and the power supply, the first voltage dividing element, the second voltage dividing element, and the third voltage dividing element are all disposed on the circuit board.
Optionally, the data processing module includes:
the analog-to-digital converter comprises an analog signal input end and a digital signal output end, the analog signal input end is electrically connected with the temperature detection circuit, and the analog-to-digital converter is used for receiving the output voltage of the temperature detection circuit and converting the output voltage into a corresponding digital signal;
and the control chip is electrically connected with the digital signal output end and is used for receiving the digital signal and obtaining the temperature of the nozzle assembly according to the digital signal.
Optionally, the nozzle assembly includes a nozzle and a heating block, the nozzle is connected to the heating block, and the heating block is connected to the heat sensitive voltage divider element.
Optionally, the heating block is provided with a groove, and the thermosensitive voltage-dividing element is located in the groove and connected with the heating block.
Optionally, the nozzle module of the three-dimensional printing apparatus further includes a protection sleeve and a fixing member, the protection sleeve accommodates the thermal voltage divider, and is located in the groove and fixedly connected to the heating block through the fixing member.
Optionally, the fixing piece is a jackscrew, the heating block is provided with a threaded hole, and one end of the jackscrew penetrates through the threaded hole to abut against the outer wall of the protective sleeve so as to fix the heating block and the protective sleeve.
Optionally, the thermosensitive voltage-dividing element is attached to the inner wall of the protective sleeve, and the outer wall of the protective sleeve is attached to the inner wall of the groove.
In a second aspect, an embodiment of the present invention provides a three-dimensional printing apparatus, including the nozzle module of the above three-dimensional printing apparatus.
The temperature measuring system provided by the present embodiment measures the temperature of the nozzle assembly using the characteristics of the unbalanced temperature detecting circuit and the characteristics of the heat sensitive voltage dividing element. In the process of temperature measurement, the temperature detection circuit can be affected by the change of the external temperature, the temperature change of the temperature detection circuit, the external electromagnetic interference and the electromagnetic interference generated in the operation of the three-dimensional printing equipment, but because bridge arms of the temperature detection circuit can be affected and the temperature detection circuit has the difference property, the influences among the bridge arms can be mutually offset, so that the influence on the measurement result is reduced, and the accuracy of the temperature measurement is improved.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings required to be used in the description of the embodiments of the present invention will be briefly introduced below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to these drawings without inventive labor.
Fig. 1 is a schematic structural diagram of a temperature measurement system according to an embodiment of the present invention;
fig. 2 is a schematic structural diagram of a temperature detection circuit according to an embodiment of the present invention;
fig. 3 is a schematic structural diagram of a nozzle module of a three-dimensional printing apparatus according to an embodiment of the present invention;
fig. 4 is a schematic diagram of the exploded structure of fig. 3.
Detailed Description
The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are some, not all, of the embodiments of the present invention. Without conflict, the embodiments and features of the embodiments described below may be combined with each other. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.
Unless otherwise defined, technical or scientific terms used herein shall have the ordinary meaning as understood by those of ordinary skill in the art to which the invention belongs. The use of "first," "second," and similar terms in the description herein do not denote any order, quantity, or importance, but rather the terms are used to distinguish one element from another. "upper", "lower", "left", "right", and the like are used merely to indicate relative positional relationships, and when the absolute position of the object being described is changed, the relative positional relationships are changed accordingly.
As shown in fig. 1-4, an embodiment of the present invention provides a nozzle module of a three-dimensional printing apparatus, including:
a nozzle assembly;
the temperature measuring system comprises a temperature measuring module and a data processing module 20, wherein the temperature measuring module comprises a temperature detecting circuit 10 and a data processing module 20, the temperature detecting circuit 10 comprises a power supply 102, a first voltage division element 103, a second voltage division element 104, a third voltage division element 105 and a thermosensitive voltage division element 101, and a first end of the first voltage division element 103 is electrically connected with a positive electrode of the power supply 102; the second end of the first voltage division element 103 is electrically connected with the data processing module 20 and the first end of the second voltage division element 104 respectively; a second end of the second voltage dividing element 104 is grounded; a first end of the third voltage division element 105 is respectively electrically connected with a first end of the first voltage division element 103 and a positive electrode of the power supply 102, and a second end of the third voltage division element 105 is respectively electrically connected with the data processing module 20 and a first end of the thermosensitive voltage division element 101; the second end of the thermosensitive voltage-dividing element 101 is electrically connected with the second end of the second voltage-dividing element 104; the temperature sensing voltage division element 101 is connected with the nozzle assembly, the temperature sensing voltage division element 101 is used for correspondingly changing the resistance value according to the change of the temperature of the nozzle assembly, and the temperature detection circuit 10 is used for sending out a corresponding electric signal according to the resistance value of the temperature sensing voltage division element 101; the data processing module 20 is configured to determine a corresponding temperature according to the electrical signal.
It should be understood that, in the present application, the voltage dividing element is an element for dividing voltage, for example, the voltage dividing element may be one or more resistors, or other elements having resistance values. The resistance value is used to represent the magnitude of the current blocking effect of the conductor, and in this embodiment, the resistance value is used to represent the magnitude of the voltage dividing effect of the voltage dividing element. The thermosensitive voltage-dividing element 101 may be a negative temperature coefficient thermosensitive voltage-dividing element 101 or a positive temperature coefficient thermosensitive voltage-dividing element 101. For example, in some embodiments, the thermally sensitive voltage divider element 101 may be a PT 100. The heat-sensitive voltage dividing element 101 is used for connection with the nozzle assembly, i.e., the heat-sensitive voltage dividing element 101 is in contact with the nozzle assembly, and thus the resistance value of the heat-sensitive voltage dividing element 101 varies with the temperature of the nozzle assembly.
It should be understood that the connection manner of the heat-sensitive voltage divider 101 and the nozzle assembly is not limited herein. In a specific implementation, the heat-sensitive voltage dividing element 101 is in contact with the nozzle assembly, so that the heat-sensitive voltage dividing element 101 can measure the temperature of the nozzle assembly.
It should be understood that the data processing module 20 is electrically connected to the temperature detecting circuit 10, and is configured to receive the output voltage of the temperature detecting circuit 10, and obtain the temperature of the nozzle assembly through processing of the output voltage of the temperature detecting circuit 10.
The temperature measuring system provided by the embodiment is used for measuring the temperature of the nozzle assembly, and the specific temperature measuring principle is described as follows: as is clear from the characteristics of the thermosensitive voltage-dividing element 101, the resistance value of the thermosensitive voltage-dividing element 101 differs at different temperatures. The heat sensitive voltage dividing element 101 is used to connect with the nozzle assembly, and thus the resistance value of the heat sensitive voltage dividing element 101 may vary according to the temperature of the nozzle assembly. The temperature detection circuit 10 is composed of four voltage division elements, which are also referred to as arms of the temperature detection circuit 10. In the present embodiment, the first voltage dividing element 103, the second voltage dividing element 104, the third voltage dividing element 105, and the thermosensitive voltage dividing element 101 are four arms of the temperature detection circuit 10. In the present embodiment, the thermosensitive voltage-dividing element 101 is one of the arms of the temperature detection circuit 10, and the resistance values of the other three voltage-dividing elements of the temperature detection circuit 10 are known values. As is apparent from the characteristics of the temperature detection circuit 10, when the temperature detection circuit 10 is in the equilibrium state, the output voltage of the temperature detection circuit 10 is zero. When the temperature detection circuit 10 is in an unbalanced state, the output voltage of the temperature detection circuit 10 is not zero. The data processing module 20 is electrically connected to the temperature detecting circuit 10, and the data processing module 20 is configured to receive the output voltage of the temperature detecting circuit 10, that is, the data processing module 20 obtains a voltage difference between the voltage at the second end of the first voltage dividing element 103 and the voltage at the second end of the third voltage dividing element 105, and calculates a resistance value of the thermosensitive voltage dividing element 101 according to the obtained voltage difference. After the resistance value of the thermosensitive voltage-dividing element 101 is obtained, the correspondence between the resistance value and the temperature of the thermosensitive voltage-dividing element 101, and thus the temperature of the nozzle assembly, can be obtained according to the properties of the thermosensitive voltage-dividing element 101. In a specific implementation, the thermosensitive voltage-dividing element 101 of each material corresponds to a temperature comparison table, and the temperatures corresponding to different resistance values can be obtained according to the temperature comparison table. The corresponding relationship between the resistance and the temperature of the PT100 is the prior art, and will not be described in detail in this application.
Fig. 2 is a circuit configuration diagram of the temperature detection circuit 10 provided in the present embodiment, and the principle of the temperature detection circuit 10 will be described below by taking fig. 2 as an example. For convenience of description, the letter reference numerals will be used hereinafter to refer to the corresponding components or numerical values for the principle explanation. Wherein the voltage of the power source 102 is E, the resistance of the first voltage divider 103 is R1, the resistance of the second voltage divider 104 is R2, the resistance of the third voltage divider 105 is R3, and the resistance of the thermal voltage divider 101 is Rx, according to kirchhoff's voltage law, the following relationships can be obtained:
where V is the output voltage of the temperature detection circuit 10. It should be understood that, in the temperature detection circuit 10 provided in the present embodiment, the output voltage refers to a terminal voltage between a first output terminal and a second output terminal, wherein the first output terminal is a common terminal of the first voltage division element 103 and the second voltage division element 104, i.e., the second terminal of the first voltage division element 103, and the first terminal of the second voltage division element 104; the second output end is a common end of the third voltage division element 105 and the heat-sensitive voltage division element 101, a second end of the third voltage division element 105, and a first end of the heat-sensitive voltage division element 101.
Meanwhile, according to the characteristics of the thermosensitive voltage-dividing element 101 itself, the following relationship between the resistance value of the thermosensitive voltage-dividing element 101 and the temperature can be obtained:
wherein R is0At a temperature of T0The resistance value corresponding to the time-sensitive voltage division element 101; beta is a material constant of the thermosensitive voltage-dividing element 101, beta corresponding to the thermosensitive voltage-dividing elements 101 of different materials is different, and after the thermosensitive voltage-dividing element 101 is determined, the material constant of the thermosensitive voltage-dividing element 101 is known; t is the temperature corresponding to the resistance Rx of the thermal voltage divider 101.
R1, R2, R3 and T0、R0And β are known values and can be derived from the properties of the material of the thermally sensitive voltage divider element 101. From the above relational expressions, R1, R2, R3 and T are known0、R0Beta and E, the value of T can be calculated by only measuring V, and the temperature of the nozzle assembly can be obtained.
The temperature measuring system provided by the present embodiment measures the temperature of the nozzle assembly using the characteristics of the unbalanced temperature detecting circuit 10 and the characteristics of the thermosensitive voltage dividing element 101. In the process of temperature measurement, the temperature detection circuit 10 is affected by the change of the external temperature, the temperature change of the temperature detection circuit itself, the external electromagnetic interference and the electromagnetic interference generated in the operation of the three-dimensional printing device, but since the bridge arms of the temperature detection circuit 10 are affected and the temperature detection circuit 10 has the difference property, the influence among the plurality of bridge arms can be mutually offset, so that the influence on the measurement result is reduced, and the accuracy of temperature measurement is improved.
Alternatively, the resistance value of the first voltage dividing element 103, the resistance value of the second voltage dividing element 104, and the resistance value of the third voltage dividing element 105 are all the same.
It is to be understood that the resistance value of the first voltage dividing element 103, the resistance value of the second voltage dividing element 104, and the resistance value of the third voltage dividing element 105 are all the same. The magnitudes of the resistance value of the first voltage-dividing element 103, the resistance value of the second voltage-dividing element 104, and the resistance value of the third voltage-dividing element 105 are not limited herein.
Since the resistance values of the first voltage dividing element 103, the second voltage dividing element 104, and the third voltage dividing element 105 are all the same, when R1-R1-R3-Rc, the following relationship can be obtained on the basis of the above relationship:
in this embodiment, since the resistance value of the first voltage dividing element 103, the resistance value of the second voltage dividing element 104, and the resistance value of the third voltage dividing element 105 are all the same, the calculation process of the temperature of the nozzle assembly is simplified, and the processing speed of the data processing module 20 is increased. Meanwhile, the first voltage division element 103, the second voltage division element 104 and the third voltage division element 105 are not thermistors, the resistance value of the first voltage division element 103, the resistance value of the second voltage division element 104 and the resistance value of the third voltage division element 105 are the same, and when the three-dimensional printing equipment is subjected to external temperature change, temperature change of a temperature detection circuit, external electromagnetic interference and electromagnetic interference generated in the operation of the three-dimensional printing equipment, the resistance value change amounts of the first voltage division element 103, the second voltage division element 104 and the third voltage division element 105 are basically unchanged, so that the influence on a measurement result can be further reduced, and the accuracy of temperature measurement is improved.
Optionally, the temperature measurement system further comprises a circuit board on which the power supply 102, the first voltage dividing element 103, the second voltage dividing element 104 and the third voltage dividing element 105 are arranged.
It should be understood that the power supply 102, the first voltage dividing element 103, the second voltage dividing element 104 and the third voltage dividing element 105 are all disposed on a circuit board. In one case, the power source 102, the first voltage dividing element 103, the second voltage dividing element 104, and the third voltage dividing element 105 are all electrically connected to the circuit board. In another case, the power supply 102, the first voltage dividing element 103, the second voltage dividing element 104, and the third voltage dividing element 105 are all integrated on a circuit board.
In a specific implementation, the temperature measurement system is generally applied to a nozzle module of a three-dimensional printing apparatus, and the three-dimensional printing apparatus generally includes a control circuit board on which the power supply 102, the first voltage dividing element 103, the second voltage dividing element 104, and the third voltage dividing element 105 may be directly disposed.
In this embodiment, the power source 102, the first voltage dividing element 103, the second voltage dividing element 104, and the third voltage dividing element 105 are all disposed on the circuit board, so that the arrangement positions of the components are more concentrated, the integration level of the temperature measurement system is improved, and the temperature measurement system is conveniently managed.
Optionally, in some embodiments, the data processing module 20 comprises:
the analog-to-digital converter comprises an analog signal input end and a digital signal output end, the analog signal input end is electrically connected with the temperature detection circuit 10, and the analog-to-digital converter is used for receiving the output voltage of the temperature detection circuit 10 and converting the output voltage into a corresponding digital signal;
and the control chip is electrically connected with the digital signal output end and is used for receiving the digital signal and obtaining the temperature of the nozzle assembly according to the digital signal.
Optionally, in some embodiments, the data processing module 20 may also be a single chip microcomputer. The singlechip is internally integrated with an analog-to-digital converter, a first output end can be connected with a first input end of the singlechip, and a second output end can be connected with a second input end of the singlechip. The first input end is one of an analog-digital conversion end of the single chip microcomputer and a common grounding end of the single chip microcomputer, and the second input end is the other of the analog-digital conversion end of the single chip microcomputer and the common grounding end of the single chip microcomputer.
Optionally, the nozzle assembly includes a nozzle 30 and a heating block 404, the nozzle 30 being coupled to the heating block 404, the heating block 404 being coupled to the heat sensitive voltage divider element 101.
It should be understood that the nozzle 30 is connected to the heating block 404 in a manner not limited thereto, and typically the nozzle 30 is partially located within the heating block 404 and connected to the heating block 404, so that the temperature of the nozzle 30 is similar to the temperature of the heating block 404. The heating block 404 is connected to the heat-sensitive voltage dividing element 101, so that the heat-sensitive voltage dividing element 101 can detect the temperature of the heating block 404, that is, can obtain the temperature of the nozzle 30.
It should be understood that the connection manner of the heating block 404 and the heat-sensitive voltage dividing element 101 is not limited herein. For example, in one embodiment, the heating block 404 is adhesively secured to the heat sensitive voltage divider 101. In another embodiment, the heating block 404 is fixed to the heat-sensitive voltage divider 101 in a snap-fit manner.
In this embodiment, the nozzle 30 is connected to a heating block 404, and the heating block 404 is connected to the heat-sensitive voltage dividing element 101. On one hand, the volume of the heating block 404 is larger than that of the nozzle 30, so that the connection convenience and stability of the heat-sensitive voltage division element 101 and the nozzle assembly are improved. On the other hand, the probability of damage to the heat-sensitive voltage division element 101 when the nozzle 30 is in contact with a printing platform in the working process is reduced, and the service life of the heat-sensitive voltage division element 101 is prolonged.
Optionally, the heating block 404 is provided with a groove, and the thermosensitive voltage-dividing element 101 is located in the groove and connected with the heating block 404.
It should be understood that the specific connection manner of the thermosensitive voltage-dividing element 101 and the heating block 404 is not limited herein. In a specific implementation, the shape of the groove matches the shape of the heat-sensitive voltage dividing element 101 to limit the movement of the heat-sensitive voltage dividing element 101. In some embodiments, a recess is located on the side of the heating block 404 away from the nozzle 30, and the heat sensitive voltage divider element 101 is located within the recess. In other embodiments, two ends of the heat-sensitive voltage divider 101 are connected with wires, the heat-sensitive voltage divider 101 is located in the groove, and the wires are adhered and fixed with the heating block 404.
In the embodiment, the thermosensitive voltage-dividing element 101 is located in the groove and connected to the heating block 404, and by the arrangement, the connection stability of the thermosensitive voltage-dividing element 101 and the heating block 404 is improved, and meanwhile, the influence of the thermosensitive voltage-dividing element 101 exposed to the environment on the measurement accuracy of the thermosensitive voltage-dividing element 101 is avoided. In addition, the arrangement of the groove also plays a certain role in protecting the thermosensitive voltage-dividing element 101.
Optionally, the nozzle module of the three-dimensional printing apparatus further includes a protective sleeve 50 and a fixing member, the protective sleeve 50 houses the heat-sensitive voltage dividing element 101, the protective sleeve 50 is located in the groove, and the protective sleeve 50 is fixedly connected with the heating block 404 through the fixing member.
It should be appreciated that protective sleeve 50 is typically a material that is thermally conductive so that heat from heating block 404 can be transferred to thermally sensitive voltage divider element 101. For example, in some embodiments, the protective sleeve 50 is a copper tube. In still other embodiments, the protective sleeve 50 is an aluminum tube.
It should be understood that a heat sensitive voltage divider element 101 is housed within the protective sleeve 50, and the shape of the protective sleeve 50 is generally matched to the heat sensitive voltage divider element 101 to ensure the connection stability of the heat sensitive voltage divider element 101 to the protective sleeve 50. For example, in some embodiments, the diameter of the protective sleeve 50 is tapered to secure the temperature sensitive voltage divider element 101.
It should be understood that the structure of the fixing member is not limited thereto. Meanwhile, the connection manner of the protection sleeve 50 and the heating block 404 via the fixing member is not limited herein.
In some embodiments, the thermally sensitive voltage divider element 101 may be a glass thermistor. Among them, the glass thermistor is a micro-resistance device manufactured by using the heat sensitive characteristic of a conductive glass, and the glass thermistor is generally spherical. In this embodiment, the heat-sensitive voltage divider element 101 can be protected to some extent by the protection sleeve 50. Meanwhile, the convenience of the dismounting operation of the protective sleeve 50 and the heating block 404 is improved through the arrangement of the jackscrew.
Optionally, in some embodiments, the fixing member is a jackscrew, the heating block 404 is provided with a threaded hole, and one end of the jackscrew passes through the threaded hole to abut against the outer wall of the protection sleeve 50 to fix the heating block 404 and the protection sleeve 50. It will be appreciated that the jackscrew is threadably connected to the heating block 404 through a threaded hole.
It should be understood that the number of the jackscrews may be plural, and the threaded holes correspond to the corresponding jackscrews one to one. One end of each of the jackscrews passes through the corresponding threaded hole and abuts against the outer wall of the protective sleeve 50. The stability of the connection of the protection sleeve 50 and the heating block 404 is further improved by the arrangement of a plurality of jackscrews. In this embodiment, through the arrangement of the jackscrew, the convenience of the detachment operation of the protection sleeve 50 and the heating block 404 is improved, and the user can replace the thermosensitive voltage-dividing element 101 conveniently during use.
Optionally, in some embodiments, the temperature sensitive voltage divider element 101 is disposed adjacent to the inner wall of the protective sleeve 50, and the outer wall of the protective sleeve 50 is disposed adjacent to the inner wall of the groove. Through the arrangement, the heat transfer among the heating block 404, the protective sleeve 50 and the heating block 404 is more sufficient, so that the accuracy of temperature measurement of the thermosensitive voltage-dividing element 101 is improved.
The embodiment of the utility model provides a three-dimensional printing equipment, including foretell nozzle module. The nozzle module of the three-dimensional printing device is the nozzle module of the three-dimensional printing device in the above embodiment, and the specific structure may refer to the description in the above embodiment, which is not described herein again. Since the nozzle module of the three-dimensional printing apparatus in the above-described embodiment is adopted in the present embodiment, the three-dimensional printing apparatus provided by the present embodiment has all the advantageous effects of the nozzle module of the three-dimensional printing apparatus in the above-described embodiment.
As an example, an embodiment of the present invention provides a nozzle module of a three-dimensional printing apparatus, including:
a nozzle 30 assembly;
the temperature measuring system comprises a temperature detecting circuit 10 and a data processing module 20, wherein the temperature detecting circuit 10 comprises a power supply 102, a first voltage division element 103, a second voltage division element 104, a third voltage division element 105 and a thermosensitive voltage division element 101, and a first end of the first voltage division element 103 is electrically connected with a positive electrode of the power supply 102; the second end of the first voltage dividing element 103 is electrically connected with the data processing module 20 and the first end of the second voltage dividing element 104 respectively; a second end of the second voltage dividing element 104 is grounded; a first end of the third voltage division element 105 is electrically connected with a first end of the first voltage division element 103 and a positive electrode of the power supply 102, respectively, and a second end of the third voltage division element 105 is electrically connected with the data processing module 20 and a first end of the thermosensitive voltage division element 101, respectively; a second end of the heat-sensitive voltage dividing element 101 is electrically connected with a second end of the second voltage dividing element 104; the thermosensitive voltage-dividing element 101 is connected with the nozzle 30 assembly, the thermosensitive voltage-dividing element 101 is used for correspondingly changing the resistance value according to the change of the temperature of the nozzle 30 assembly, and the temperature detection circuit 10 is used for sending out a corresponding electric signal according to the resistance value of the thermosensitive voltage-dividing element 101; the data processing module 20 is configured to determine a corresponding temperature according to the electrical signal.
Further, the resistance value of the first voltage dividing element 103, the resistance value of the second voltage dividing element 104, and the resistance value of the third voltage dividing element 105 are all the same.
Further, the temperature measuring system further includes a circuit board on which the power source 102, the first voltage dividing element 103, the second voltage dividing element 104, and the third voltage dividing element 105 are disposed.
Still further, the data processing module 20 includes:
the analog-to-digital converter comprises an analog signal input end and a digital signal output end, the analog signal input end is electrically connected with the temperature detection circuit 10, and the analog-to-digital converter is used for receiving the output voltage of the temperature detection circuit 10 and converting the output voltage into a corresponding digital signal;
and the control chip is electrically connected with the digital signal output end and is used for receiving the digital signal and obtaining the temperature of the nozzle 30 assembly according to the digital signal.
Further, the nozzle 30 assembly includes a nozzle 30 and a heating block 404, the nozzle 30 is connected to the heating block 404, and the heating block 404 is connected to the heat-sensitive voltage divider 101.
Furthermore, the heating block 404 is provided with a groove, and the thermosensitive voltage-dividing element 101 is located in the groove and connected with the heating block 404.
Furthermore, the nozzle 30 module of the three-dimensional printing apparatus further includes a protective sleeve 50 and a fixing member, the heat-sensitive voltage dividing element 101 is disposed in the protective sleeve 50, and the protective sleeve 50 is located in the groove and is fixedly connected to the heating block 404 through the fixing member.
Further, the fixing member is a jackscrew, the heating block 404 is provided with a threaded hole, and one end of the jackscrew passes through the threaded hole to abut against the outer wall of the protection sleeve 50, so as to fix the heating block 404 and the protection sleeve 50.
Furthermore, the thermosensitive voltage-dividing element 101 is attached to the inner wall of the protection sleeve 50, and the outer wall of the protection sleeve 50 is attached to the inner wall of the groove.
The above embodiments are only specific embodiments of the present invention, but the scope of the present invention is not limited thereto, and any person skilled in the art can easily think of changes or substitutions within the technical scope of the present invention, and all should be covered within the scope of the present invention. Therefore, the protection scope of the present invention shall be subject to the protection scope of the claims.
Claims (10)
1. A nozzle module for a three-dimensional printing device, comprising:
a nozzle assembly;
the temperature measuring system comprises a temperature measuring module and a data processing module, wherein the temperature measuring module comprises a temperature detecting circuit and a data processing module, and the temperature detecting circuit comprises a power supply, a first voltage dividing element, a second voltage dividing element, a third voltage dividing element and a thermosensitive voltage dividing element; the first end of the first voltage division element is electrically connected with the positive electrode of the power supply; the second end of the first voltage division element is electrically connected with the data processing module and the first end of the second voltage division element respectively; the second end of the second voltage division element is grounded; the first end of the third voltage division element is respectively and electrically connected with the first end of the first voltage division element and the positive electrode of the power supply; the second end of the third voltage division element is electrically connected with the data processing module and the first end of the thermosensitive voltage division element respectively; the second end of the thermosensitive voltage-dividing element is electrically connected with the second end of the second voltage-dividing element; the temperature sensing voltage division element is connected with the nozzle assembly, the temperature sensing voltage division element is used for correspondingly changing the resistance value according to the change of the temperature of the nozzle assembly, and the temperature detection circuit is used for sending a corresponding electric signal according to the resistance value of the temperature sensing voltage division element; the data processing module is used for determining the corresponding temperature according to the electric signal.
2. The nozzle module of the three-dimensional printing apparatus according to claim 1, wherein a resistance value of the first voltage dividing element, a resistance value of the second voltage dividing element, and a resistance value of the third voltage dividing element are all the same.
3. The nozzle module of the three-dimensional printing apparatus of claim 1, wherein the temperature measurement system further comprises a circuit board, the power supply, the first voltage-dividing element, the second voltage-dividing element, and the third voltage-dividing element all disposed on the circuit board.
4. The nozzle module of the three-dimensional printing apparatus according to claim 1, wherein the data processing module comprises:
the analog-to-digital converter comprises an analog signal input end and a digital signal output end, the analog signal input end is electrically connected with the temperature detection circuit, and the analog-to-digital converter is used for receiving the output voltage of the temperature detection circuit and converting the output voltage into a corresponding digital signal;
and the control chip is electrically connected with the digital signal output end and is used for receiving the digital signal and obtaining the temperature of the nozzle assembly according to the digital signal.
5. The nozzle module of the three-dimensional printing apparatus of claim 1, wherein the nozzle assembly comprises a nozzle and a heating block, the nozzle is coupled to the heating block, and the heating block is coupled to the heat sensitive voltage divider element.
6. The nozzle module of the three-dimensional printing device as claimed in claim 5, wherein the heating block is provided with a groove, and the heat-sensitive voltage dividing element is positioned in the groove and connected with the heating block.
7. The nozzle module of the three-dimensional printing device according to claim 6, further comprising a protective sleeve and a fixing member, wherein the protective sleeve accommodates the heat-sensitive voltage dividing element, is located in the groove, and is fixedly connected with the heating block through the fixing member.
8. The nozzle module of the three-dimensional printing apparatus according to claim 7, wherein the fixing member is a jackscrew, the heating block is provided with a threaded hole, and one end of the jackscrew passes through the threaded hole to abut against the outer wall of the protection sleeve so as to fix the heating block and the protection sleeve.
9. The nozzle module of the three-dimensional printing device of claim 7, wherein the heat sensitive voltage divider element is attached to an inner wall of the protective sleeve, and an outer wall of the protective sleeve is attached to an inner wall of the groove.
10. A three-dimensional printing apparatus, characterized by comprising a nozzle module of the three-dimensional printing apparatus according to any of claims 1-9.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202121492839.3U CN214927137U (en) | 2021-07-01 | 2021-07-01 | Nozzle module of three-dimensional printing equipment and three-dimensional printing equipment |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202121492839.3U CN214927137U (en) | 2021-07-01 | 2021-07-01 | Nozzle module of three-dimensional printing equipment and three-dimensional printing equipment |
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| Publication Number | Publication Date |
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| CN214927137U true CN214927137U (en) | 2021-11-30 |
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| CN202121492839.3U Active CN214927137U (en) | 2021-07-01 | 2021-07-01 | Nozzle module of three-dimensional printing equipment and three-dimensional printing equipment |
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