Ink Temperature Adjustment Device and Method for Inkjet Coding Machine

Abstract

The present invention relates to the technical field of inkjet printers, and particularly to an ink temperature adjustment device for an inkjet printer, comprising: a heat-insulating housing, the cavity of which is filled with a heat-conducting medium, and which is provided with ink inlet and outlet interfaces for connecting the ink inlet and supply pipelines respectively, and the ink supply pipeline leads to the nozzle of a continuous inkjet system; a heat exchange tube immersed in the heat-conducting medium, with both ends respectively connected to the ink inlet and outlet interfaces; a heating component and a cooling component respectively used for heating and cooling the heat-conducting medium; a temperature sensor for detecting the temperature of the heat-conducting medium; and the heating component, the cooling component and the temperature sensor are all communicatively connected to a controller. The present invention also relates to an ink temperature adjustment method for an inkjet printer using this device, mainly that the controller controls the heating component to heat or controls the cooling component to cool the heat-conducting medium according to the temperature of the heat-conducting medium detected by the temperature sensor, so as to keep the temperatures of the heat-conducting medium and the ink within a set temperature range. The ink temperature can be effectively adjusted in different ambient temperatures.

Description

Technical Field

[0001] The present invention relates to the technical field of inkjet printers, and in particular to an ink temperature adjustment device for an inkjet printer and an ink temperature adjustment method for an inkjet printer. Background Art

[0002] Traditional inkjet printers do not have a link for adjusting the temperature of the ink. However, the fluidity of the ink will change significantly with the change of its temperature, thus causing the detected value of the ink viscosity to change. When the inkjet printer is turned on, since the machine is in a cold state, the detected ink viscosity will be on the high side, and when the viscosity is high, the solvent will be automatically added; after the machine runs for a period of time and the temperature rises, the problem of too low viscosity is likely to occur. The ink viscosity affects both the effect of crystal vibration separation of ink dots on the nozzle and the charging effect of the ink dots, thus affecting the stability of the inkjet printer.

[0003] The existing inkjet printers only heat the ink at the nozzle. This method has a certain effect on improving the printing stability of the inkjet printer when the ambient temperature is low. However, since only heating at the nozzle is not involved in viscosity detection, the ink viscosity deviation is relatively large. When the ambient temperature is low, such as in winter, it is necessary to reset the ink viscosity reference, otherwise the printing stability will be affected; when the ambient temperature is high, it loses its effect. Summary of the Invention

[0004] In view of the above-mentioned defects of the prior art, the technical problem to be solved by the present invention is to provide an ink temperature adjustment device and method for an inkjet printer, which can effectively adjust the ink temperature in different external ambient temperatures and keep the ink of the inkjet printer working within the set optimal temperature range.

[0005] To solve the above technical problems, the present invention adopts the following technical solutions:

[0006] The present invention provides an ink temperature adjustment device for an inkjet printer, including: a heat-insulating housing, which is hollow inside to form a sealed chamber filled with a heat-conducting medium. The heat-insulating housing is provided with an ink inlet interface and an ink outlet interface communicating with the chamber. The ink inlet interface is used to connect the ink inlet pipeline for inputting ink, and the ink outlet interface is used to connect the ink supply pipeline for outputting ink. The ink supply pipeline leads to the nozzle of the continuous inkjet system; a heat exchange pipe, which is arranged in the chamber and immersed in the heat-conducting medium. The two ends of the heat exchange pipe are respectively connected to the ink inlet interface and the ink outlet interface; a heating component, which is used to heat the heat-conducting medium; a cooling component, which is used to cool the heat-conducting medium; a temperature sensor, which is used to detect the temperature of the heat-conducting medium; a controller, and the heating component, the cooling component and the temperature sensor are all communicatively connected to the controller.

[0007] Preferably, the heat-insulating housing includes an outer shell, a bottom shell and an upper cover. The inside of the outer shell is axially penetrated up and down. The bottom shell and the upper cover are respectively connected to the lower end and the upper end of the outer shell and jointly form a chamber with the outer shell. A lower sealing ring is provided between the lower end face of the outer shell and the bottom shell, and an upper sealing ring is provided between the upper end face of the outer shell and the upper cover.

[0008] Preferably, the heat-conducting medium is heat-conducting oil.

[0009] Preferably, an inlet ink connector and an outlet ink connector are respectively connected to the outside of the heat-insulating housing at the inlet ink interface and the outlet ink interface. The inlet ink connector and the outlet ink connector are respectively used for connecting an inlet ink pipeline and a supply ink pipeline. Interface sealing rings are provided between the inlet ink connector and the inlet ink interface and between the outlet ink connector and the outlet ink interface.

[0010] Preferably, the heating assembly and the cooling assembly are respectively arranged at the bottom and the top of the heat-insulating housing, and the heat exchange tube is placed between the heating assembly and the cooling assembly.

[0011] Preferably, the heating assembly includes a heating bottom plate, a heating element and a pressing plate. The heating bottom plate is connected to the heat-insulating housing in the chamber and forms an accommodation space independent of the chamber with the heat-insulating housing. Both the heating element and the pressing plate are arranged in the accommodation space. The pressing plate is connected to the heating bottom plate, and the heating element is located between the pressing plate and the heating bottom plate.

[0012] Preferably, an installation port communicating with the chamber is provided on the heat-insulating housing. The cooling assembly includes a cold conduction member, a refrigeration sheet, a heat sink and a cooling fan. One end of the cold conduction member is arranged in the chamber and immersed in the heat-conducting medium. The other end of the cold conduction member is hermetically connected to the installation port. The refrigeration sheet is arranged in the installation port. The cold end of the refrigeration sheet is in contact with the cold conduction member. The heat sink is arranged outside the heat-insulating housing and in contact with the hot end of the refrigeration sheet. The cooling fan is arranged on the side of the heat sink away from the refrigeration sheet.

[0013] Preferably, a condensation sealing ring is provided between the cold conduction member and the installation port.

[0014] The present invention also provides a method for adjusting the ink temperature of an inkjet printer. Using the inkjet printer ink temperature adjustment device as described above, the ink enters the heat exchange tube through the inlet ink pipeline and the inlet ink interface, and after flowing through the heat exchange tube, it is sent to the nozzle of the continuous inkjet system through the outlet ink interface and the supply ink pipeline. The controller controls the heating assembly to heat the heat-conducting medium or controls the cooling assembly to refrigerate the heat-conducting medium according to the temperature of the heat-conducting medium detected by the temperature sensor, so that the temperature of the heat-conducting medium is maintained within a set temperature range, and the temperature of the ink flowing through the heat exchange tube is maintained within a set temperature range through heat exchange of the heat exchange tube.

[0015] Compared with the prior art, the present invention has significant progress:

[0016] The present invention first adopts a method of regulating the temperature of the ink sent to the nozzle of a continuous inkjet system. The controller controls the heating component to heat the heat-conducting medium or controls the cooling component to cool the heat-conducting medium according to the temperature of the heat-conducting medium detected by the temperature sensor, so that the temperature of the heat-conducting medium is maintained within a set temperature range. And through heat exchange in the heat exchange tube, the temperature of the ink flowing through the heat exchange tube is maintained within the set temperature range. It can effectively regulate the ink temperature in different external environmental temperatures, so that the temperature of the ink sent to the nozzle of the continuous inkjet system after flowing through the heat exchange tube is maintained at the optimal working temperature, so that the fluidity of the ink will not change due to the change of the external environmental temperature. Thus, the solvent addition can be precisely controlled, the change in the ink viscosity is very small, the stability of the ink viscosity control is maintained, the charging effect of the ink can be ensured to be stable, and the state of the ink separating into ink dots in the nozzle cavity can also be ensured to be stable, which well guarantees the stability of the inkjet printing. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 FIG. is a schematic structural diagram of an ink temperature regulating device of an inkjet printer according to an embodiment of the present invention.

[0018] Figure 2 FIG. is a schematic structural diagram of the ink temperature regulating device of the inkjet printer according to the embodiment of the present invention after removing the outer shell.

[0019] Figure 3 FIG. is a side view schematic diagram of the ink temperature regulating device of the inkjet printer according to the embodiment of the present invention.

[0020] Figure 4 is Figure 3 a sectional view taken along line A-A in FIG.

[0021] Figure 5 FIG. is an exploded view of the ink temperature regulating device of the inkjet printer according to the embodiment of the present invention after removing the cold conduction member, the heat exchange tube and the temperature sensor.

[0022] Figure 6 FIG. is a schematic structural diagram of the cold conduction member in the ink temperature regulating device of the inkjet printer according to the embodiment of the present invention.

[0023] Figure 7 FIG. is a schematic diagram showing that the two ports of the heat exchange tube in the ink temperature regulating device of the inkjet printer according to the embodiment of the present invention are respectively connected to an ink inlet joint and an ink outlet joint.

[0024] Among them, the reference numerals are explained as follows:

[0025] 1 Thermal insulation housing

[0026] 10 Chamber

[0027] 101 Ink inlet interface

[0028] 102 Ink outlet interface

[0029] 103 Installation port

[0030] 11 Housing

[0031] 12 Bottom shell

[0032] 13 Upper cover

[0033] 14 Lower sealing ring

[0034] 15 Upper sealing ring

[0035] 2 Heat exchange pipe

[0036] 3 Heating component

[0037] 30 Accommodating space

[0038] 31 Heating bottom plate

[0039] 32 Heating element

[0040] 33 Pressing plate

[0041] 4 Cooling component

[0042] 41 Cold conduction part

[0043] 42 Thermoelectric cooler

[0044] 43 Heat sink

[0045] 44 Cooling fan

[0046] 45 Condensation sealing ring

[0047] 5 Temperature sensor

[0048] 6 Ink inlet joint

[0049] 7 Ink outlet joint

[0050] 8 Interface sealing ring Detailed implementation manners

[0051] The following further details the specific implementation manners of the present invention in conjunction with the accompanying drawings. These implementation manners are only used to illustrate the present invention and are not intended to limit the present invention.

[0052] In the description of the present invention, it should be noted that the orientation or positional relationship indicated by the terms "center", "longitudinal", "transverse", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc. is based on the orientation or positional relationship shown in the drawings. It is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be construed as a limitation to the present invention. In addition, the terms "first" and "second" are only used for descriptive purposes and cannot be construed as indicating or implying relative importance.

[0053] In the description of the present invention, it should be noted that unless otherwise clearly specified and defined, the terms "installed", "connected", and "connected" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium, and it can be the communication inside two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0054] In addition, in the description of the present invention, unless otherwise specified, the meaning of "a plurality of" is two or more.

[0055] As Figures 1 to 7 shown, it is an embodiment of the ink temperature regulating device of the inkjet printer of the present invention.

[0056] See Figures 1 to 5 , the ink temperature regulating device of this embodiment includes a heat preservation housing 1, a heat exchange tube 2, a heating component 3, a cooling component 4, a temperature sensor 5 and a controller (not shown in the figure).

[0057] Among them, the inside of the heat preservation housing 1 is hollow to form a sealed chamber 10, and a heat-conducting medium is filled in the chamber 10. To ensure good heat-conducting effect, the heat-conducting medium is preferably heat-conducting oil. Preferably, the heat-conducting medium fills the chamber 10. The heat preservation housing 1 is provided with an ink inlet interface 101 and an ink outlet interface 102 that communicate with the chamber 10. The ink inlet interface 101 is used to connect to the ink inlet pipeline for inputting ink, and the ink outlet interface 102 is used to connect to the ink supply pipeline for outputting ink, and the ink supply pipeline leads to the nozzle of the continuous inkjet system.

[0058] The heat exchange tube 2 is arranged in the chamber 10 of the heat preservation housing 1 and immersed in the heat-conducting medium in the chamber 10. The two ports of the heat exchange tube 2 are respectively connected to the ink inlet interface 101 and the ink outlet interface 102. Ink is input from the ink inlet pipeline, enters the heat exchange tube 2 through the ink inlet interface 101 and one port of the heat exchange tube 2, flows through the heat exchange tube 2, then enters the ink supply pipeline through the other port of the heat exchange tube 2 and the ink outlet interface 102, and is output through the ink supply pipeline to the nozzle of the continuous inkjet system. Heat exchange between the heat-conducting medium and the ink flowing through the heat exchange tube 2 is achieved, that is, the heat-conducting medium at high or low temperature can heat or cool the ink flowing through the heat exchange tube 2 to adjust the temperature of the ink.

[0059] The heating component 3 is used to heat the heat-conducting medium in the chamber 10 of the heat preservation housing 1 to raise the temperature of the heat-conducting medium. The cooling component 4 is used to cool the heat-conducting medium in the chamber 10 of the heat preservation housing 1 to lower the temperature of the heat-conducting medium. The temperature sensor 5 is used to detect the temperature of the heat-conducting medium in the chamber 10 of the heat preservation housing 1. The temperature sensor 5 can be installed on the heat preservation housing 1, and the sensing end of the temperature sensor 5 is inserted into the heat-conducting medium in the chamber 10 of the heat preservation housing 1. The heating component 3, the cooling component 4 and the temperature sensor 5 are all communicatively connected to the controller.

[0060] During use, the temperature sensor 5 continuously detects the temperature of the heat-conducting medium in the chamber 10 of the heat preservation housing 1, and transmits the detected temperature signal of the heat-conducting medium to the controller. The controller receives the temperature signal of the heat-conducting medium detected by the temperature sensor 5, and controls the heating component 3 or the cooling component 4 to work according to the temperature of the heat-conducting medium detected by the temperature sensor 5: when the temperature of the heat-conducting medium detected by the temperature sensor 5 is lower than the set temperature range, the controller controls the heating component 3 to heat the heat-conducting medium to raise the temperature of the heat-conducting medium to within the set temperature range; when the temperature of the heat-conducting medium detected by the temperature sensor 5 is higher than the set temperature range, the controller controls the cooling component 4 to cool the heat-conducting medium to lower the temperature of the heat-conducting medium to within the set temperature range. Thus, the temperature of the heat-conducting medium is maintained within the set temperature range, and through heat exchange of the heat exchange tube 2, the temperature of the ink flowing through the heat exchange tube 2 can be maintained within the set temperature range. Therefore, the ink temperature adjustment device of the present embodiment can effectively regulate the ink temperature in different external environmental temperatures, keep the temperature of the ink flowing through the heat exchange tube 2 and then sent to the nozzle of the continuous inkjet system at the optimal working temperature, so that the fluidity of the ink will not change due to the change of the external environmental temperature, thereby accurately controlling the solvent addition, making the change of the ink viscosity very small, maintaining the stability of the ink viscosity control, ensuring the stability of the ink charging effect, and also ensuring the stability of the state of the ink separating into ink dots in the nozzle pelvic cavity of the nozzle, and well ensuring the stability of the inkjet printing.

[0061] In this embodiment, the form of the controller is not limited, and a conventional controller such as a PLC controller or a single-chip microcomputer can be used.

[0062] See Figure 1 、 Figure 5 and Figure 7 As shown in

[0063] In this embodiment, preferably, the outside of the heat preservation housing 1 is respectively connected with an ink inlet joint 6 and an ink outlet joint 7 at the ink inlet interface 101 and the ink outlet interface 102. The ink inlet joint 6 and the ink outlet joint 7 are respectively used to connect the ink inlet pipeline and the ink supply pipeline, and interface sealing rings 8 are provided between the ink inlet joint 6 and the ink inlet interface 101 and between the ink outlet joint 7 and the ink outlet interface 102. In this embodiment, one end of the ink inlet joint 6 and one end of the ink outlet joint 7 are respectively inserted into the ink inlet interface 101 and the ink outlet interface 102 on the heat preservation housing 1 and are respectively connected to both ends of the heat exchange pipe 2. The other ends of the ink inlet joint 6 and the ink outlet joint 7 are both located outside the heat preservation housing 1 and are respectively connected to the ink inlet pipeline and the ink supply pipeline.

[0063] In this embodiment, to ensure the heat preservation performance of the heat preservation housing 1, the heat preservation housing 1 is preferably made of nylon.

[0064] See Figure 4 and Figure 5 As shown in

[0065] In this embodiment, preferably, the ink inlet interface 101 and the ink outlet interface 102 on the heat preservation housing 1 are both provided on the upper cover 13. The temperature sensor 5 is provided on the upper cover 13 and extends through the upper cover 13 into the heat conduction medium in the chamber 10.

[0066] See Figure 4 As shown in

[0067] See Figure 4 and Figure 5, preferably, the heating assembly 3 includes a heating base plate 31, a heating element 32, and a pressing plate 33. The heating base plate 31 is connected to the heat preservation housing 1 within the chamber 10 and forms an accommodation space 30 independent of the chamber 10 between it and the heat preservation housing 1. Preferably, the heating base plate 31 is fixedly connected to the bottom shell 12 of the heat preservation housing 1 and forms the accommodation space 30 between it and the bottom shell 12. The lower sealing ring 14 between the lower end surface of the outer shell 11 and the bottom shell 12 is arranged between the lower end surface of the outer shell 11 and the heating base plate 31, so as to ensure the sealing of the chamber 10 and the independence of the accommodation space 30 from the chamber 10. Both the heating element 32 and the pressing plate 33 are arranged within the accommodation space 30. The pressing plate 33 is connected to the heating base plate 31, and the heating element 32 is located between the pressing plate 33 and the heating base plate 31. The heating element 32 is pressed and fixed to the heating base plate 31 by the pressing plate 33. The heating element 32 is communicatively connected to the controller, and the controller controls the heating of the heating element 32. The heating element 32 preferably uses a ceramic heating sheet.

[0068] See Figure 4 , Figure 5 and Figure 6 , preferably, preferably, the heat preservation housing 1 is provided with an installation opening 103 communicating with the chamber 10. Preferably, the installation opening 103 is arranged on the upper cover 13 of the heat preservation housing 1. The cooling assembly 4 includes a cold conduction member 41, a refrigeration sheet 42, a heat sink 43, and a cooling fan 44. One end (such as the lower end) of the cold conduction member 41 is arranged within the chamber 10 of the heat preservation housing 1 and immersed in the heat conduction medium. The other end of the cold conduction member 41 is hermetically connected to the installation opening 103. Preferably, a condensation sealing ring 45 is arranged between the cold conduction member 41 and the installation opening 103 to ensure the sealing of the chamber 10 at the installation opening 103. The cold conduction member 41 preferably uses a condensation sheet. The refrigeration sheet 42 is arranged within the installation opening 103. The cold end of the refrigeration sheet 42 is in contact with the cold conduction member 41. The heat sink 43 is arranged outside the heat preservation housing 1. The heat sink 43 is in contact with the hot end of the refrigeration sheet 42. The cooling fan 44 is arranged on the side of the heat sink 43 away from the refrigeration sheet 42. The cold quantity at the cold end of the refrigeration sheet 42 is transferred to the heat conduction medium within the chamber 10 through the cold conduction member 41 to cool the heat conduction medium. The cooling fan 44 and the heat sink 43 dissipate heat from the hot end of the refrigeration sheet 42 to ensure the refrigeration effect of the refrigeration sheet 42. The refrigeration sheet 42 is communicatively connected to the controller, and the controller controls the refrigeration of the refrigeration sheet 42. The refrigeration sheet 42 preferably uses a semiconductor refrigeration sheet.

[0069] Based on the above ink temperature adjustment device of the inkjet printer, an embodiment of the present invention further provides an ink temperature adjustment method for the inkjet printer. The ink temperature adjustment method of the embodiment adopts the above ink temperature adjustment device of the present embodiment, so that the ink enters the heat exchange tube 2 through the ink inlet pipeline and the ink inlet interface 101, and after flowing through the heat exchange tube 2, it is sent to the nozzle of the continuous inkjet system through the ink outlet interface 102 and the ink supply pipeline. The controller controls the heating component 3 to heat the heat conduction medium or controls the cooling component 4 to cool the heat conduction medium according to the temperature of the heat conduction medium detected by the temperature sensor 5, so that the temperature of the heat conduction medium is maintained within the set temperature range, and the temperature of the ink flowing through the heat exchange tube 2 is maintained within the set temperature range through heat exchange in the heat exchange tube 2.

[0070] Specifically, one end of the ink inlet connector 6 and one end of the ink outlet connector 7 are respectively inserted into the ink inlet interface 101 and the ink outlet interface 102 on the heat preservation housing 1 and are respectively connected to the two ports of the heat exchange tube 2. The other end of the ink inlet connector 6 and the other end of the ink outlet connector 7 are respectively connected to the ink inlet pipeline and the ink supply pipeline. The ink is input from the ink inlet pipeline and enters the heat exchange tube 2 through the ink inlet connector 6 at the ink inlet interface 101 and one port of the heat exchange tube 2. After flowing through the heat exchange tube 2, it enters the ink supply pipeline through the other port of the heat exchange tube 2 and the ink outlet connector 7 at the ink outlet interface 102, and is output through the ink supply pipeline to the nozzle of the continuous inkjet system. Heat exchange between the heat conduction medium and the ink flowing through the heat exchange tube 2 is realized through the heat exchange tube 2. The ink flowing through the heat exchange tube 2 can be heated or cooled by the high-temperature or low-temperature heat conduction medium, so as to realize the adjustment of the ink temperature. The temperature sensor 5 continuously detects the temperature of the heat conduction medium in the chamber 10 of the heat preservation housing 1, and transmits the detected temperature signal of the heat conduction medium to the controller. The controller receives the temperature signal of the heat conduction medium detected by the temperature sensor 5, and controls the heating component 3 or the cooling component 4 to work according to the temperature of the heat conduction medium detected by the temperature sensor 5: when the temperature of the heat conduction medium detected by the temperature sensor 5 is lower than the set temperature range, the controller controls the heating element 32 of the heating component 3 to heat the heat conduction medium, so that the temperature of the heat conduction medium rises to within the set temperature range; when the temperature of the heat conduction medium detected by the temperature sensor 5 is higher than the set temperature range, the controller controls the refrigerating sheet 42 of the cooling component 4 to cool the heat conduction medium, so that the temperature of the heat conduction medium drops to within the set temperature range. Thus, the temperature of the heat conduction medium is maintained within the set temperature range, and the temperature of the ink flowing through the heat exchange tube 2 is maintained within the set temperature range through heat exchange in the heat exchange tube 2.

[0071] Therefore, the ink temperature adjustment method of the inkjet printer in this embodiment can effectively control the ink temperature in different external environmental temperatures, so that the temperature of the ink flowing through the heat exchange tube 2 and then sent to the nozzle of the continuous inkjet system remains at the optimal working temperature, ensuring that the fluidity of the ink does not change due to the change of the external environmental temperature. Thus, the solvent addition can be precisely controlled, the change in the ink viscosity is very small, the stability of the ink viscosity control is maintained, the charging effect of the ink can be ensured to be stable, and the state of the ink separating into ink dots in the nozzle cavity can also be ensured to be stable, well guaranteeing the stability of printing.

[0072] In summary, the ink temperature adjustment device of the inkjet printer in this embodiment and the ink temperature adjustment method of the inkjet printer in this embodiment first adopt the method of controlling the temperature of the ink sent to the nozzle of the continuous inkjet system, realizing the effective adjustment of the ink temperature in different external environmental temperatures, and enabling the inkjet printer ink to work within the set optimal temperature range.

[0073] The above are only the preferred embodiments of the present invention. It should be noted that for those of ordinary skill in the art, without departing from the technical principle of the present invention, several improvements and replacements can still be made, and these improvements and replacements should also be regarded as the protection scope of the present invention.

Claims

1. An ink temperature adjustment device for an inkjet printer, characterized in that Comprising: A heat-insulating housing (1), which is internally hollow to form a sealed chamber (10). A heat-conducting medium is filled in the chamber (10). An ink inlet interface (101) and an ink outlet interface (102) that are connected to the chamber (10) are provided on the heat-insulating housing (1). The ink inlet interface (101) is used to connect an ink inlet pipeline for inputting ink, and the ink outlet interface (102) is used to connect an ink supply pipeline for outputting ink. The ink supply pipeline leads to a nozzle of a continuous inkjet system; A heat exchange pipe (2), which is arranged in the chamber (10) and immersed in the heat-conducting medium. Two ends of the heat exchange pipe (2) are respectively connected to the ink inlet interface (101) and the ink outlet interface (102); A heating assembly (3), which is used to heat the heat-conducting medium; A cooling assembly (4), which is used to cool the heat-conducting medium; A temperature sensor (5), which is used to detect the temperature of the heat-conducting medium; A controller, and the heating assembly (3), the cooling assembly (4) and the temperature sensor (5) are all communicatively connected to the controller; The heating assembly (3) and the cooling assembly (4) are respectively arranged at the bottom and the top of the heat-insulating housing (1), and the heat exchange pipe (2) is placed between the heating assembly (3) and the cooling assembly (4); The heating assembly (3) includes a heating bottom plate (31), a heating element (32) and a pressing plate (33). The heating bottom plate (31) is connected to the heat-insulating housing (1) in the chamber (10) and forms an accommodation space (30) independent of the chamber (10) between the heating bottom plate (31) and the heat-insulating housing (1). The heating element (32) and the pressing plate (33) are both arranged in the accommodation space (30). The pressing plate (33) is connected to the heating bottom plate (31), and the heating element (32) is located between the pressing plate (33) and the heating bottom plate (31); An installation opening (103) that is connected to the chamber (10) is provided on the heat-insulating housing (1). The cooling assembly (4) includes a cold conduction member (41), a refrigeration sheet (42), a heat sink (43) and a cooling fan (44). One end of the cold conduction member (41) is arranged in the chamber (10) and immersed in the heat-conducting medium. The other end of the cold conduction member (41) is hermetically connected to the installation opening (103). The refrigeration sheet (42) is arranged in the installation opening (103). The cold end of the refrigeration sheet (42) is in close contact with the cold conduction member (41). The heat sink (43) is arranged outside the heat-insulating housing (1) and in close contact with the hot end of the refrigeration sheet (42). The cooling fan (44) is arranged on one side of the heat sink (43) away from the refrigeration sheet (42).

2. The ink temperature adjustment device for the inkjet printer according to claim 1, wherein The heat-insulating housing (1) includes an outer shell (11), a bottom shell (12) and an upper cover (13). The inside of the outer shell (11) is axially penetrated up and down. The bottom shell (12) and the upper cover (13) are respectively connected to the lower end and the upper end of the outer shell (11) and jointly form the chamber (10) with the outer shell (11). A lower sealing ring (14) is provided between the lower end surface of the outer shell (11) and the bottom shell (12), and an upper sealing ring (15) is provided between the upper end surface of the outer shell (11) and the upper cover (13).

3. The ink temperature adjustment device for the inkjet printer according to claim 1, characterized in that, The heat-conducting medium is heat-conducting oil.

4. The ink temperature adjustment device of the inkjet printer according to claim 1, characterized in that, An ink inlet joint (6) and an ink outlet joint (7) are respectively connected to the outside of the heat-insulating housing (1) at the ink inlet interface (101) and the ink outlet interface (102). The ink inlet joint (6) and the ink outlet joint (7) are respectively used for connecting the ink inlet pipeline and the ink supply pipeline. Interface sealing rings (8) are provided between the ink inlet joint (6) and the ink inlet interface (101), and between the ink outlet joint (7) and the ink outlet interface (102).

5. The ink temperature regulating device of the inkjet printer according to claim 1, characterized in that, A condensation sealing ring (45) is provided between the cold-conducting member (41) and the mounting opening (103).

6. A method for adjusting the temperature of the ink of an inkjet printer, characterized in that, By using the ink temperature regulating device of the ink jet printer as described in any one of claims 1 to 5, the ink enters the heat exchange tube (2) through the ink inlet pipeline and the ink inlet interface (101), flows through the heat exchange tube (2), and then is sent to the nozzle of the continuous ink jet system through the ink outlet interface (102) and the ink supply pipeline. The controller controls the heating assembly (3) to heat the heat-conducting medium or controls the cooling assembly (4) to refrigerate the heat-conducting medium according to the temperature of the heat-conducting medium detected by the temperature sensor (5), so that the temperature of the heat-conducting medium is maintained within a set temperature range, and the temperature of the ink flowing through the heat exchange tube (2) is maintained within a set temperature range through heat exchange of the heat exchange tube (2).

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