An external heating device for inkjet printer printheads

Abstract

This utility model relates to an external heating device for an inkjet printer printhead, comprising a heating sleeve, a heating wire, and a sweeping and blowing assembly. A sweeping and blowing channel is formed within the heating sleeve, and an air inlet communicating with the sweeping and blowing channel is provided on the outer wall of the heating sleeve. The heating wire is installed on the outer wall of the heating sleeve for heating the heating sleeve. The sweeping and blowing end of the sweeping and blowing assembly communicates with the air inlet. When the printhead is placed inside the heating sleeve, the heating wire heats the heating sleeve, thus placing the printhead inside the heating sleeve in a high-temperature environment, preventing moisture condensation on the printhead. Simultaneously, by blowing air into the sweeping and blowing channel of the heating sleeve through the sweeping and blowing assembly, high-humidity external air can be prevented from entering the heating sleeve and causing the printhead to become damp.

Description

Technical Field

[0001] This utility model relates to the field of inkjet printer nozzle technology, and in particular to an external heating device for inkjet printer nozzles. Background Technology

[0002] Current inkjet printer printheads are equipped with internal heating functions. For example, the heating structure of the inkjet printer printhead proposed in utility model patent application number CN201320757858.3 includes a substrate. The front side of the substrate is provided with an ink channel and a first valve assembly. The first valve assembly is used to control the selective passage of ink through the ink channel. The ink channel includes a straight tube section and a curved heating section. The back side of the substrate is provided with a heating device for heating the curved heating section.

[0003] In damp and rainy weather, the air humidity is high, and the high-voltage electrode plate inside the printhead is prone to moisture, resulting in low high voltage and inability to output ink normally. Although the printhead has a built-in heating function, its heating power is limited and it is difficult to use it for the printhead's moisture prevention work. Utility Model Content

[0004] In view of this, it is necessary to provide an external heating device for the inkjet printer head to solve the problem that the heating function of the printhead itself is limited and difficult to apply to the moisture protection of the printhead.

[0005] This utility model provides an external heating device for the printhead of an inkjet printer, including a heating sleeve, a heating wire, and a sweeping and blowing assembly. A sweeping and blowing channel is formed inside the heating sleeve, and an air inlet is provided on the outer wall of the heating sleeve to communicate with the sweeping and blowing channel. The heating wire is installed on the outer wall of the heating sleeve and is used to heat the heating sleeve. The sweeping and blowing end of the sweeping and blowing assembly is connected to the air inlet.

[0006] Furthermore, there are two air inlets, which are arranged opposite to each other on both sides of the heating sleeve.

[0007] Furthermore, the air inlet is located at the middle position of the heating sleeve.

[0008] Furthermore, the heating wire is wound around the outer wall of the heating sleeve in a spiral direction.

[0009] Furthermore, it also includes a temperature probe, the measuring end of which is connected to the heating jacket for detecting the temperature of the heating jacket.

[0010] Furthermore, it also includes a temperature controller, which is connected to the temperature probe to receive temperature information. The temperature controller is electrically connected to the heating wire and is used to control the power of the heating wire according to the temperature information.

[0011] Furthermore, the sweeping assembly includes an air pipe and an air source, with the air outlet of the air source connected to the air inlet via the air pipe.

[0012] Furthermore, the purging assembly also includes a pressure regulating valve, which is installed on the air pipe.

[0013] Furthermore, it also includes a bracket, to which both the nozzle and the heating sleeve are fixedly connected.

[0014] Furthermore, it also includes a first connecting rod, a second connecting rod, and two clamps. One end of the first connecting rod is fixedly connected to the bracket, and the other end of the first connecting rod is connected to the nozzle via one of the clamps. One end of the second connecting rod is fixedly connected to the bracket, and the other end of the second connecting rod is connected to the heating sleeve via the other clamp.

[0015] Compared with existing technologies, placing the nozzle inside the heating jacket and heating the jacket with heating wires creates a higher temperature environment for the nozzle inside the heating jacket, preventing moisture from condensing on the nozzle. At the same time, blowing air into the blowing channel of the heating jacket through the blowing assembly can prevent humid air from entering the heating jacket and causing the nozzle to become damp. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the overall structure of the external heating device for the inkjet printer nozzle provided in an embodiment of the present utility model;

[0017] Figure 2 for Figure 1 A schematic diagram of the structure in which the central nozzle is installed inside the heating jacket;

[0018] Figure 3 for Figure 1 A schematic diagram of the structure in which the whole assembly is installed on the bracket. Detailed Implementation

[0019] The preferred embodiments of the present invention will now be described in detail with reference to the accompanying drawings, which form part of this application and are used together with the embodiments of the present invention to illustrate the principles of the present invention, but are not intended to limit the scope of the present invention.

[0020] like Figure 1-2 As shown, the present invention provides an external heating device for a printer printhead, comprising a heating sleeve 100, a heating wire 200, and a sweeping and blowing assembly 300. A sweeping and blowing channel 110 is formed inside the heating sleeve 100, and an air inlet 11a communicating with the sweeping and blowing channel 110 is provided on the outer wall of the heating sleeve 100. The heating wire 200 is installed on the outer wall of the heating sleeve 100 for heating the sleeve 100. The sweeping and blowing end of the sweeping and blowing assembly 300 is connected to the air inlet 11a.

[0021] During implementation, the nozzle M1 is placed inside the heating jacket 100, and the heating wire 200 heats the heating jacket 100, thereby placing the nozzle M1 inside the heating jacket 100 in a high-temperature environment to prevent water vapor from condensing on the nozzle M1. At the same time, air is blown into the sweeping channel 110 of the heating jacket 100 by the sweeping assembly 300 to prevent the outside air with high humidity from entering the heating jacket 100 and causing the nozzle M1 to become damp.

[0022] In this embodiment, the heating jacket 100 is a structure that wraps around the nozzle M1, and a sweeping channel 110 is formed inside it. By sending dry gas into the sweeping channel 110, it is possible to prevent the flow of gas with high external humidity into the sweeping channel 110, thereby providing a dry environment for the nozzle M1 and avoiding the influence of water vapor on the nozzle M1 during rainy and humid weather.

[0023] The heating jacket 100 can be made of stainless steel and is manufactured according to the shape and size of the nozzle M1. The gap between the inner wall of the heating jacket 100 and the nozzle M1 is controlled at about 3-5mm so that the heat generated after heating can be conducted to the nozzle M1.

[0024] In one embodiment, the outer wall of the heating jacket 100 is provided with an insulating coating to reduce heat loss.

[0025] It is understandable that the printhead M1 can be connected to the inkjet printer host M2 via the throat M3. This is the structure of an inkjet printer that is conceived by those skilled in the art, and will not be elaborated or explained further here.

[0026] like Figure 3 As shown, in order to facilitate the relative fixation of the nozzle M1 and the heating sleeve 100, this embodiment also includes a bracket M4, and both the nozzle M1 and the heating sleeve 100 are fixedly connected to the bracket M4.

[0027] In one embodiment, the system further includes a first connecting rod M5, a second connecting rod M6, and two pipe clamps. One end of the first connecting rod M5 is fixedly connected to the bracket M4, and the other end of the first connecting rod M5 is connected to the nozzle M1 via one of the pipe clamps. One end of the second connecting rod M6 is fixedly connected to the bracket M4, and the other end of the second connecting rod M6 is connected to the heating jacket 100 via the other pipe clamp.

[0028] In this embodiment, the air inlet 11a is a structure for introducing purging gas into the purging channel 110. In order to make the gas flow direction of the purging channel 110 uniform, in one embodiment, there are two air inlets 11a, and the two air inlets 11a are arranged opposite to each other on both sides of the heating jacket 100.

[0029] In one embodiment, the air inlet 11a is located at the middle position of the heating jacket 100.

[0030] In this embodiment, the heating wire 200 is installed on the heating jacket 100 to heat the jacket 100, so that the nozzle M1 inside the heating jacket 100 is in a suitable temperature environment.

[0031] In one embodiment, the heating wire 200 is wound around the outer wall of the heating sleeve 100 in a spiral direction.

[0032] If the temperature inside the heating jacket 100 is too high, it will damage the internal components of the nozzle M1. Therefore, in one embodiment, a temperature probe 210 is also included. The measuring end of the temperature probe 210 is connected to the heating jacket 100 and is used to detect the temperature of the heating jacket 100.

[0033] In one embodiment, a temperature controller 220 is also included. The temperature controller 220 is connected to a temperature probe 210 for receiving temperature information. The temperature controller 220 is electrically connected to a heating wire 200 for controlling the power of the heating wire 200 according to the temperature information.

[0034] The temperature probe 210 can monitor the temperature of the heating jacket 100 and provide the measured data to the temperature controller 220. The temperature controller 220 controls the power of the heating wire 200, thereby achieving the function of accurately controlling the temperature of the heating jacket 100 and ensuring that the heating jacket 100 is always in a constant temperature state.

[0035] The sweeping assembly 300 in this embodiment includes an air pipe and an air source, with the outlet of the air source connected to the air inlet 11a via the air pipe.

[0036] In one embodiment, the purging assembly 300 further includes a pressure regulating valve 310, which is installed on the air pipe. The pressure regulating valve 310 adjusts the flow rate of the gas supplied to the heating jacket 100 according to the on-site operating conditions, stabilizes the pressure during purging, and prevents pressure fluctuations from affecting the performance of the nozzle M1.

[0037] It should be noted that the gas can be directly sourced from the factory's instrument air, and the heating function can be turned off when the weather is good.

[0038] Compared with the prior art: the nozzle M1 is placed inside the heating jacket 100, and the heating wire 200 heats the heating jacket 100, so that the nozzle M1 inside the heating jacket 100 is in a high-temperature environment, which prevents water vapor from condensing on the nozzle M1. At the same time, the blowing assembly 300 blows air into the blowing channel 110 of the heating jacket 100, which can prevent the outside air with high humidity from entering the heating jacket 100 and causing the nozzle M1 to become damp.

[0039] The above description is only a preferred embodiment of the present utility model, but the protection scope of the present utility model is not limited thereto. Any changes or substitutions that can be easily conceived by those skilled in the art within the technical scope disclosed in the present utility model should be included within the protection scope of the present utility model.

Claims

1. An external heating device for an inkjet printer printhead, characterized in that, include: A heating jacket has a sweeping channel inside it, and an air inlet hole communicating with the sweeping channel is provided on the outer wall of the heating jacket. A heating wire, which is installed on the outer wall of the heating sleeve, is used to heat the heating sleeve; The sweeping and blowing assembly has its sweeping and blowing end connected to the air inlet.

2. The external heating device for the inkjet printer nozzle according to claim 1, characterized in that, The number of air inlets is two, and the two air inlets are arranged opposite each other on both sides of the heating sleeve.

3. The external heating device for the inkjet printer nozzle according to claim 1, characterized in that, The air inlet is located at the middle position of the heating sleeve.

4. The external heating device for the inkjet printer nozzle according to claim 1, characterized in that, The heating wire is wound around the outer wall of the heating sleeve in a spiral direction.

5. The external heating device for the inkjet printer nozzle according to claim 1, characterized in that, It also includes a temperature probe, the measuring end of which is connected to the heating jacket for detecting the temperature of the heating jacket.

6. The external heating device for the inkjet printer nozzle according to claim 5, characterized in that, It also includes a temperature controller, which is connected to the temperature probe to receive temperature information. The temperature controller is electrically connected to the heating wire and is used to control the power of the heating wire according to the temperature information.

7. The external heating device for the inkjet printer nozzle according to claim 1, characterized in that, The sweeping assembly includes an air pipe and an air source, with the air outlet connected to the air inlet via the air pipe.

8. The external heating device for the inkjet printer nozzle according to claim 7, characterized in that, The purging assembly also includes a pressure regulating valve, which is installed on the air pipe.

9. The external heating device for the inkjet printer nozzle according to claim 1, characterized in that, It also includes a bracket, to which both the nozzle and the heating sleeve are fixedly connected.

10. The external heating device for the inkjet printer nozzle according to claim 1, characterized in that, It also includes a first connecting rod, a second connecting rod, and two pipe clamps. One end of the first connecting rod is fixedly connected to the bracket, and the other end of the first connecting rod is connected to the nozzle via one of the pipe clamps. One end of the second connecting rod is fixedly connected to the bracket, and the other end of the second connecting rod is connected to the heating sleeve via the other pipe clamp.

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