Smoke exhaust device and color development box assembly

Abstract

The invention provides a smoke exhaust device and a color development box assembly, relates to the field of digital printing, and solves the problems that negative pressure difference is formed in the length direction of a whole color development box due to large air pressure difference in an air duct of the smoke exhaust device, and lampblack is easy to leak. The smoke exhaust device comprises a shell, an oil smoke collecting cavity located in the shell and air ducts, the air ducts comprise grid hole air ducts, wall hole air ducts and a main air duct, grid holes communicated with the oil smoke collecting cavity are formed in one side wall of each grid hole air duct, and the number of the grid hole air ducts is two or more in a partitioned mode in the length direction of the oil smoke collecting cavity; the wall hole air ducts are communicated with all the grid hole air ducts on the same side of the oil smoke collecting cavity; the main air duct is communicated with the negative pressure device, and an air inlet of the main air duct is communicated with the middle of the corresponding wall hole air duct. The air flues and the grid hole air flues arranged in the length direction of the oil fume collecting cavity in the partitioned mode, the negative pressure in the oil fume collecting cavity in the fume exhaust device is stable and balanced, oil fume in the color development box can be conveniently exhausted, and the fume exhaust effect is good.

Description

Technical Field

[0001] The present invention relates to the technical field of digital printing, and in particular to an exhaust device and a color developing box assembly. Background Art

[0002] Digital printing, with the advantages of high precision, clear patterns, and convenient adjustment, not only meets the needs of single-piece and small-batch production but also features environmental protection, energy conservation, and low pollution. It uses thermal sublimation ink, and after printing, it needs to be kept in a high-temperature environment for a certain period of time for color development to present a colorful picture. Currently, when the traditional color developing box in the digital printing market conducts color development, before the spray-painted cloth enters the color development process, the spray-painted printing surface will contact the deflecting roller, which is likely to contaminate the picture. Researchers have developed a non-contact air pressure balance type color developing box. Before the spray-painted cloth enters the color development link, the reverse side of the printed picture of the spray-painted cloth is made to contact the over-roller, avoiding contact between the side with the printed picture and the over-roller. Compared with the traditional color developing box, this design can effectively prevent the picture from contaminating the over-roller during the working process.

[0003] In this kind of color developing box body, before the spray-painted cloth after printing undergoes color development, the picture will not contact the over-roller, effectively preventing the picture from being contaminated. However, there are still two major problems in the existing technology:

[0004] First, the negative pressure difference formed in the exhaust area is too large, resulting in the fact that not all of the oil fume generated during the color development process can be discharged through the air duct. Some oil fume will leak, as Figure 1 shown. As Figure 1 shown, when the thermal sublimation ink on the cloth surface undergoes color development in a high-temperature environment, a large amount of oil fume will be generated. These oil fumes move upward and enter the oil fume collection area A. Due to the lack of air pressure balance in the length direction of the color developing box 200', there is a difference in the negative pressure formed in the oil fume collection area A in the middle of the exhaust device 100' in the entire length direction of the color developing box 200'. This leads to the situation that the oil fume cannot be completely exhausted by the exhaust device 100', and some oil fume (represented by the curve in the figure) will leak out from the gap at the top of the color developing box 200'.

[0005] Second, the structure of the non-contact color developing box will cause strong air convection between the external cold air and the high-temperature gas inside the color developing box at the gap at the top of the color developing box. If this phenomenon is not handled, the temperature field along the length direction inside the color developing box will be uneven. This uneven temperature field will result in poor color fastness of the developed picture and obvious color difference along the length direction of the color developing box, ultimately leading to a decline in the quality of the developed picture. For specific reference, see Figure 2 . As Figure 2As shown, the arrow direction in the figure indicates the air flow path; when the cloth surface is undergoing the hair coloring operation, the temperature inside the hair coloring box 200' is significantly higher than the external ambient temperature. Under the action of this temperature difference, the external cold air will enter through the upper gap of the hair coloring box 200', lowering the temperature on the left side of the hair coloring box 200'; at the same time, the hot air inside the hair coloring box 200' flows out from the right side, making the temperature on the right side of the hair coloring box relatively high. This temperature field imbalance phenomenon caused by the flow of hot and cold air is particularly obvious in the winter when the ambient temperature is relatively low. And the uneven temperature field inside the hair coloring box 200' will directly lead to poor hair coloring quality of the picture.

[0006] Therefore, for the smoke exhaust device in the hair coloring box assembly in the prior art, the primary problem to be solved is that the wind pressure difference in the air duct is large, resulting in a negative pressure difference in the entire length direction of the hair coloring box, and the oil fume cannot be completely exhausted by the smoke exhaust device, and the oil fume is prone to leakage. Summary of the Invention

[0007] The purpose of the present invention is to provide a smoke exhaust device and a hair coloring box assembly to solve the technical problem in the prior art that the wind pressure difference in the air duct of the smoke exhaust device is large, resulting in a negative pressure difference in the entire length direction of the hair coloring box and the oil fume is prone to leakage. The many technical effects that can be produced by the preferred technical solutions among the many technical solutions provided by the present invention are described in detail below.

[0008] To achieve the above purpose, the present invention provides the following technical solutions:

[0009] The smoke exhaust device provided by the present invention includes a housing, an oil fume collection chamber located inside the housing, and an air duct. The air duct includes a grid hole air duct, a wall hole air duct, and a main air duct, where:

[0010] One side wall of the grid hole air duct is provided with grid holes communicating with the oil fume collection chamber, and two or more grid hole air ducts are partitioned and arranged along the length direction of the oil fume collection chamber;

[0011] The wall hole air duct communicates with all the grid hole air ducts located on the same side of the oil fume collection chamber;

[0012] The main air duct is connected to a negative pressure device, and the air inlet of the main air duct is connected to the middle part of the corresponding wall hole air duct.

[0013] Preferably, four or more grid hole air ducts are partitioned and arranged along the length direction of the oil fume collection chamber;

[0014] The grid hole air duct and the wall hole air duct extend to the opposite ends of the oil fume collection chamber and are equal in length to the oil fume collection chamber, where the oil fume collection chamber extends to both ends of the hair coloring box;

[0015] The air ducts are distributed on opposite sides of the oil fume collection cavity and are symmetrically arranged about the axis of the oil fume collection cavity.

[0016] Preferably, two adjacent and independent grid hole air ducts are separated by a partition board, and the grid holes are uniformly arranged on the corresponding side walls of the grid hole air ducts;

[0017] Wall holes communicating with the wall hole air ducts are provided on the other side walls of the grid hole air ducts;

[0018] A through hole is provided in the middle of the corresponding side wall of the wall hole air duct, and the through hole communicates with the main air duct.

[0019] Preferably, among all the grid hole air ducts on the same side of the oil fume collection cavity, along the direction away from the air inlet of the main air duct, the number of the grid holes gradually increases, and / or the aperture of the grid holes gradually increases;

[0020] Among all the grid hole air ducts on the same side of the oil fume collection cavity, along the direction away from the air inlet of the main air duct, the aperture of the wall holes gradually increases.

[0021] Preferably, the smoke exhaust device further includes inclined diversion walls, which are located on opposite sides of the oil fume collection cavity and are configured as the cavity walls of the oil fume collection cavity;

[0022] The horizontal distance between the two inclined diversion walls gradually increases from top to bottom, so that the oil fume collection cavity is a conical cavity, and the cross-sectional area of the conical cavity gradually increases from top to bottom;

[0023] An annular groove is provided below the inclined diversion wall, and the annular groove is located in the hair coloring box and is used to accommodate the oil droplets flowing down along the inclined diversion wall.

[0024] Preferably, an inlet cloth port is provided at the top of the smoke exhaust device, and a first brush is fixed to the top of the smoke exhaust device, wherein:

[0025] The first brush is located above the inlet cloth port and is distributed on opposite sides of the inlet cloth port, and the distance between the two groups of first brushes is less than the width of the inlet cloth port, or the two groups of first brushes are in contact with each other.

[0026] Preferably, a lock and a handle are provided on the smoke exhaust device, wherein the lock is detachably and fixedly connected to the hair coloring box;

[0027] A high-temperature resistant sealing strip is provided on the contact surface between the smoke exhaust device and the hair coloring box.

[0028] The present invention also provides a color developing box assembly, including a color developing box and the above-mentioned smoke exhaust device. The smoke exhaust device is detachably fixed on the top of the color developing box, and the oil fume collecting cavity is communicated with the color developing box;

[0029] A first over-roller is arranged above the cloth inlet of the smoke exhaust device, and a second over-roller is arranged below the cloth outlet of the color developing box. The first over-roller can contact the reverse side of the printed picture of the inkjet cloth, and the second over-roller contacts the printed picture of the inkjet cloth, so that the inkjet cloth passes through the smoke exhaust device and the color developing box in sequence.

[0030] Preferably, a partition is fixed in the inner cavity of the color developing box. The partition is fixed on one side or opposite sides of the inner cavity of the color developing box, and air holes for gas to flow through are arranged on the partition;

[0031] When the partition is fixed on opposite sides of the inner cavity of the color developing box, there is a gap for the inkjet cloth to pass through between the two oppositely arranged partitions.

[0032] Preferably, an annular groove is arranged at the bottom of the inner cavity of the color developing box. The annular groove is used to accommodate the oil droplets flowing down from the smoke exhaust device, and an oil drain hole is arranged at the bottom of the annular groove.

[0033] Preferably, a heating part and a temperature sensor are fixed in the color developing box, wherein:

[0034] The heating parts are arranged at intervals along the length direction and / or width direction of the color developing box;

[0035] The temperature sensors are arranged at intervals along the length direction and / or width direction of the color developing box;

[0036] A heat insulation layer is fixed on the side wall of the color developing box and / or the smoke exhaust device.

[0037] Preferably, the color developing box assembly further includes a preheating box. The preheating box is fixed at the bottom of the color developing box. The preheating box and the color developing box are only spaced by a heat conducting plate. The preheating box has a preheating cavity communicated with the cloth outlet of the color developing box. The color developing box heats the air in the preheating cavity through the heat conducting plate;

[0038] The second over-roller is located in the preheating cavity, and an outlet is arranged on the side wall of the preheating box;

[0039] A heat preservation layer is fixed on the side wall of the preheating box.

[0040] Preferably, second hair brushes are fixed on both sides outside the outlet. The distance between the two groups of second hair brushes is less than the width of the outlet, or the two groups of second hair brushes are in contact with each other.

[0041] The smoke exhaust device and the color developing box assembly provided by the present invention have the following beneficial effects compared with the prior art: Each group of air ducts includes a grid hole air duct, a wall hole air duct, and a main air duct. During operation, the oil fume in the oil fume collection cavity first enters the grid hole air ducts in each area after being shunted by the grid holes, then flows into the wall hole air ducts, and then enters the main air duct. Finally, it is drawn out of the color developing box by means of a negative pressure device. Compared with the structure of a single air duct, the above method of setting the grid hole air duct, the wall hole air duct, and the main air duct, and the zoning setting of the grid hole air ducts along the length direction of the oil fume collection cavity (the length direction of the color developing box) make the negative pressure in the oil fume collection cavity of the smoke exhaust device stable and balanced, facilitating the discharge of oil fume in the color developing box, without oil fume leakage, and having a good smoking effect. BRIEF DESCRIPTION OF THE DRAWINGS

[0042] In order to more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the following will briefly introduce the drawings required for the description of the embodiments or the prior art. Obviously, the drawings in the following description are only some embodiments of the present invention. For those of ordinary skill in the art, other drawings can be obtained based on these drawings without creative efforts.

[0043] Figure 1 It is a schematic diagram of oil fume leakage in a color developing box in the prior art. In the figure, A represents the oil fume collection area, 100’ is the smoke exhaust device; 200’ is the color developing box;

[0044] Figure 2 It is a schematic diagram of convection in a color developing box in the prior art. In the figure, 200’ is the color developing box; 400 is the spray painting cloth;

[0045] Figure 3 It is a schematic diagram of the overall external structure of the color developing box assembly in the present invention;

[0046] Figure 4 It is a cross-sectional view of the color developing box assembly in the present invention;

[0047] Figure 5 It is a schematic diagram of the layout structure of the air duct and the oil fume collection cavity;

[0048] Figure 6 It is a partial enlarged view of the smoke exhaust device;

[0049] Figure 7 It is Figure 6 The cross-sectional view at A-A in

[0050] Figure 8 It is a longitudinal sectional view of the color developing box;

[0051] Figure 9 It is a partial enlarged view of the color developing box;

[0052] Figure 10 It is Figure 9Cross-sectional view taken along line A-A;

[0053] Figure 11 is a schematic structural view of the partition board;

[0054] Figure 12 is a schematic structural view of the preheating box.

[0055] In the figure, 100 is the smoke exhaust device; 200 is the coloring box; 300 is the preheating box; 400 is the inkjet cloth; 1 is the main air duct; 2 is the wall hole air duct; 201 is the through hole; 3 is the grid hole air duct; 301 is the grid hole; 302 is the wall hole; 4 is the inclined guide wall; 5 is the heat conducting plate; 6 is the first brush; 7 is the cloth inlet; 8 is the oil fume collecting cavity; 9 is the partition board; 10 is the buckle; 11 is the handle; 12 is the high temperature resistant sealing strip; 13 is the first roller; 14 is the second roller; 15 is the preheating cavity; 16 is the second brush; 17 is the outlet; 18 is the heat preservation layer; 19 is the heat insulation layer; 20 is the printing carriage; 21 is the printing platform; 22 is the heating pipe; 23 is the temperature sensor; 24 is the annular groove; 25 is the oil drain hole; 26 is the partition board; 261 is the air hole; 27 is the gap; 28 is the bracket; 29 is the cloth outlet. Detailed implementation manners

[0056] To make the objectives, technical solutions and advantages of the present invention clearer, the technical solutions of the present invention will be described in detail below. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all of the embodiments. All other implementation manners obtained by those of ordinary skill in the art based on the embodiments of the present invention without creative efforts shall fall within the scope protected by the present invention.

[0057] In the description of the present invention, it should be understood that the orientation or positional relationship indicated by the terms "center", "length", "width", "height", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "side", etc. is based on the orientation or positional relationship shown in the drawings, and 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 thus should not be construed as a limitation to the present invention. In the description of the present invention, unless otherwise specified, the meaning of "a plurality of" is two or more.

[0058] In the prior art, as shown in Figure 1 the negative pressure difference formed in the air extraction area is too large, resulting in that not all of the oil fume generated during the coloring process can be discharged through the air duct. Some oil fume will leak, as shown in Figure 1 shown. As shown in Figure 1As shown, when the heat sublimation ink on the fabric develops color in a high-temperature environment, a large amount of oil fume is generated. These oil fumes move upward and enter the oil fume collection area A. Since the air pressure balance of the smoke exhaust device is not carried out in the length direction of the color developing box 200’, there is a difference in the negative pressure formed in the oil fume collection area A in the middle of the smoke exhaust device 100’ in the entire length direction of the color developing box 200’. This causes the oil fumes to not be completely exhausted by the smoke exhaust device 100’, and some oil fumes (represented by the curves in the figure) will leak out from the gaps at the top of the color developing box 200’. Of course, the air convection diagram in the figure is only for illustration.

[0059] In view of the above problems, the embodiment of the present invention provides a smoke exhaust device and a color developing box assembly, which make the negative pressure in the oil fume collection cavity of the smoke exhaust device stable and balanced, facilitate the discharge of oil fumes in the color developing box, have no oil fume leakage, and have a good smoking effect.

[0060] The following will Figures 1 - 12 elaborate on the technical solutions provided by the present invention in more detail.

[0061] Embodiment 1:

[0062] As Figures 3 - 7 shown, this embodiment provides a smoke exhaust device 100: including a housing, an oil fume collection cavity 8 located inside the housing, and an air duct. The air duct includes a grid hole air duct 3, a wall hole air duct 2, and a main air duct 1. Among them: a grid hole 301 communicating with the oil fume collection cavity 8 is provided on one side wall of the grid hole air duct 3, and two or more grid hole air ducts 3 are partitioned along the length direction of the oil fume collection cavity 8; preferably, four or more grid hole air ducts 3 are partitioned along the length direction of the oil fume collection cavity 8. The wall hole air duct 2 communicates with all the grid hole air ducts 3 located on the same side of the oil fume collection cavity 8; the main air duct 1 is connected to a negative pressure device, and the air inlet of the main air duct 1 is connected to the middle of the corresponding wall hole air duct 2. That is, at least two grid hole air ducts 3 are distributed on each side of the air inlet of the main air duct 1, and the negative pressure device can be a smoking fan.

[0063] Among them, the oil fume collection cavity 8 in the smoke exhaust device 100 is connected to the color developing box 200, and four or more grid hole air ducts 3 are partitioned along the length direction of the oil fume collection cavity 8. Since the oil fume collection cavity 8 is arranged along the length direction of the color developing box 200, four or more grid hole air ducts 3 are partitioned along the length direction of the color developing box 200. Specifically, as Figure 5 shown, in the figure, there are 5 partitions on each of the left and right sides of the grid hole air duct 3 along the length direction of the oil fume collection cavity 8; in actual application, the number of left and right partitions can be set to be greater than or less than 5 according to specific requirements.

[0064] See Figures 5 - 7 shown, Figure 5The arrow direction in the figure indicates the air flow path; the air ducts are distributed on the opposite sides of the oil fume collection cavity 8 and are symmetrically arranged about the axis of the oil fume collection cavity 8.

[0065] The area between the two groups of air ducts is the oil fume collection cavity 8. The oil fume generated during the coloring process of the coloring box 200 will be collected in the oil fume collection cavity 8 and discharged from the coloring box 200 through the air ducts. Each group of air ducts includes a main air duct 1, a wall hole air duct 2, and a grid hole air duct 3. During operation, the oil fume in the oil fume collection cavity 8 first enters the grid hole air duct 3 through the grid holes 301, then flows into the wall hole air duct 2 and the main air duct 1, and finally is pumped out of the coloring box 200 by means of a fan. The air ducts with the above structure facilitate the discharge of the oil fume in the oil fume collection cavity 8 and keep the negative pressure stable in the oil fume collection cavity 8.

[0066] In order to completely extract the oil fume in the oil fume collection cavity 8, the negative pressure generated by the fan through the air ducts needs to be basically consistent along the entire length direction of the coloring box 200 in the oil fume collection cavity 8. As an optional implementation manner, see Figure 5 As shown, the grid hole air duct 3 and the wall hole air duct 2 extend to the opposite ends of the oil fume collection cavity 8 and are equal in length to the oil fume collection cavity 8, wherein the oil fume collection cavity 8 extends to both ends of the coloring box 200.

[0067] In the air ducts of this embodiment, the grid hole air duct 3 and the wall hole air duct 2 are equal in length to the oil fume collection cavity 8, that is, the oil fume in each part of the oil fume collection cavity 8 can enter the corresponding partition grid hole air duct 3 through the grid holes 301, and the negative pressure in the grid hole air duct 3 is basically balanced, preventing oil fume leakage caused by uneven pressure in each part of the oil fume collection cavity 8.

[0068] As an optional implementation manner, see Figure 5 As shown, two adjacent and independent grid hole air ducts 3 are separated by a partition baffle 9; the grid holes 301 are evenly arranged on the corresponding side walls of the grid hole air duct 3; a wall hole 302 communicating with the wall hole air duct 2 is provided on the other side wall of the grid hole air duct 3; a through hole 201 is provided in the middle of the corresponding side wall of the wall hole air duct 2, and the through hole 201 communicates with the main air duct 1.

[0069] See Figure 6 and Figure 7 As shown, grid holes 301 are provided on the side wall of the grid hole air duct 3 facing the oil fume collection cavity 8, and the grid holes 301 are evenly distributed, facilitating the oil fume in the oil fume collection cavity 8 to be shunted to the corresponding grid hole air ducts 3 through the grid holes 301 and reducing turbulence.

[0070] The magnitude of the negative pressure generated by the oil fume collection chamber 8 corresponding to each independent partition depends on the sum of the frictional pressure loss, local pressure loss, and the pressure loss of the grid holes 301 in that independent partition. To create a substantially uniform negative pressure environment in the oil fume collection chamber 8, it can be achieved by adjusting the aperture of the wall holes 302 in each independent partition, as well as the number and aperture of the grid holes 301.

[0071] Since the main air duct 1 is connected to the negative pressure device, the grid hole air duct 3 farther from the air inlet of the main air duct 1 has relatively less negative pressure, and it is difficult to extract the oil fume. To balance the negative pressure at various locations in the oil fume collection chamber 8. As an alternative implementation, among all the grid hole air ducts 3 on the same side of the oil fume collection chamber 8, along the direction away from the air inlet of the main air duct 1, the number of grid holes 301 gradually increases, and / or, the aperture of the grid holes 301 gradually increases; among all the grid hole air ducts 3 on the same side of the oil fume collection chamber 8, along the direction away from the air inlet of the main air duct 1, the aperture of the wall holes 302 gradually increases.

[0072] Along the direction away from the air inlet of the main air duct 1, the number of grid holes 301 gradually increases, or, the aperture of the grid holes 301 gradually increases, or, the number of grid holes 301 gradually increases and the aperture of the grid holes 301 gradually increases, which can improve the effect of the negative pressure device on the grid hole air duct 3 at the far end of the air inlet of the main air duct 1, improve the pressure stability at various locations in the air duct, make the negative pressure uniform in the length direction of the air duct and the oil fume collection chamber 8, and reduce the leakage of flue gas caused by a large negative pressure difference.

[0073] See Figure 7 As shown, the smoke exhaust device 100 further includes an inclined guide wall 4. The inclined guide walls 4 are located on opposite sides of the oil fume collection chamber 8 and are configured as the chamber walls of the oil fume collection chamber 8; the horizontal distance between the two inclined guide walls 4 gradually increases from top to bottom, so that the oil fume collection chamber 8 is a conical chamber, and the cross-sectional area of the conical chamber gradually increases from top to bottom; see Figure 4 and Figure 9 As shown, an annular groove 24 is provided below the inclined guide wall 4. The annular groove 24 is located in the color developing box 200 and is used to accommodate the oil droplets flowing down along the inclined guide wall 4.

[0074] During the color developing process, the generated oil droplets will slide down along this inclined guide wall 4 to the inner wall of the color developing box 200 and finally flow into the annular groove 24 of the color developing device. The above structure effectively avoids the pollution of the picture by waste oil droplets during color development.

[0075] See Figure 4 and Figure 5As described above, the fumes generated during the coloring process will enter the fume collection chamber 8. The negative pressure device creates a substantially uniform negative pressure environment along the longitudinal direction of the coloring chamber 200 in this area through the air duct system. The specific operation process is as follows: The fumes in the fume collection chamber 8 first enter the grid hole air duct 3 through the grid holes 301. Partition plates 9 are provided between every two grid hole air ducts 3, thereby separating several independent grid hole air ducts 3. Then, the fumes flow into the wall hole air duct 2 through the wall holes 302, and the aperture sizes of the wall holes 302 corresponding to each partition are different. Subsequently, the fumes pass through the through holes 201 at the distal end and the proximal end and enter the main air duct 1, and finally are drawn out of the coloring chamber 200 by the negative pressure device (fan). As can be seen from the figure, one end of the main air duct 1 is in the middle of the wall hole air duct 2, that is, the two through holes 201 at the distal end and the proximal end are in the middle of the wall hole air duct 2.

[0076] In the smoke exhaust device 100 of this embodiment, the structure of the air duct can balance the air pressure in the length direction of the fume collection chamber 8, that is, the length direction of the coloring chamber 200, reduce the negative pressure difference formed by the fume collection chamber 8 in the entire length direction of the coloring chamber 200, facilitate the smoke that cannot be drawn away by the smoke exhaust device 100, and prevent the fumes from leaking from the gap at the top of the coloring chamber 200.

[0077] As an optional implementation manner, refer to Figure 7 As shown, an inlet for the fabric 7 is provided at the top of the smoke exhaust device 100, and a first brush 6 is fixed to the top of the smoke exhaust device 100, wherein: the first brush 6 is located above the inlet for the fabric 7 and is distributed on opposite sides of the inlet for the fabric 7, and the distance between the two groups of first brushes 6 is less than the width of the inlet for the fabric 7, or the two groups of first brushes 6 are in contact with each other.

[0078] Refer to Figure 7 As shown, at the inlet for the fabric 7 above the smoke exhaust device 100, there is a first brush 6. Since the thermal sublimation ink is not yet dry when the inkjet fabric 400 enters the coloring chamber 200, the gap between the two first brushes 6 can be adjusted manually according to the change of the external environment temperature. In this way, both heat loss can be maximally prevented and the inkjet fabric 400 can be prevented from being contaminated by the brush. The first brush 6 is installed on the brush group bracket 28, and the user can flexibly adjust the gap 27 between the two first brushes 6 according to actual needs, so as to meet the requirements of the coloring process.

[0079] As an optional implementation manner, refer to Figure 3 and Figure 4 As shown, a lock 10 and a handle 11 are provided on the smoke exhaust device 100, wherein the lock 10 is detachably and fixedly connected to the coloring chamber 200.

[0080] The exhaust device 100 is firmly connected to the coloring device through a number of latches 10. During the long-term use of the coloring box 200, oil fume carbonization and coking will inevitably occur on its inner wall, so it must be cleaned regularly. To make the cleaning work more convenient, the exhaust device 100 is fixed to the coloring box 200 by the latch 10. After opening the latch 10, the exhaust device 100 can be easily removed from the coloring device. In addition, to further facilitate the disassembly by the operator, a handle 11 is specially installed on the exhaust device 100.

[0081] To prevent oil fume leakage between the coloring device and the exhaust device 100, a high-temperature resistant sealing strip 12 is provided on the contact surface between the exhaust device 100 and the coloring box 200. The high-temperature resistant sealing strip 12 can be a high-temperature resistant rubber strip, and the high-temperature resistant sealing strip 12 is fixed to the uppermost end of the exhaust device 100 by gluing. In this way, when the high-temperature resistant sealing strip 12 ages due to long-term use, it can be easily peeled off and a new high-temperature resistant sealing strip 12 can be replaced.

[0082] Embodiment 2:

[0083] See Figure 3 and Figure 4 As shown, this embodiment provides a coloring box assembly, including a coloring box 200 and the above-mentioned exhaust device 100. The exhaust device 100 is detachably fixed to the top of the coloring box 200 (by means of the latch 10), and the oil fume collecting chamber 8 is connected to the coloring box 200; a first over-roller 13 is arranged above the fabric inlet 7 of the exhaust device 100, and a second over-roller 14 is arranged below the fabric outlet 29 of the coloring box 200. The first over-roller 13 contacts the reverse side of the printed picture of the inkjet fabric 400, and the second over-roller 14 can contact the printed picture of the inkjet fabric 400 (since the coloring is already completed at this time, even if the second over-roller 14 contacts the front side, it will not contaminate the picture), and the inkjet fabric 400 passes through the exhaust device 100 and the coloring box 200 in sequence.

[0084] The coloring box assembly of this embodiment can be assembled into an integrated machine with a printing device (such as Figure 4 the printing carriage 20 and the printing platform 21 in Figure 3 ) according to user needs, or can be used alone as a coloring device. As

[0085] See Figure 4 As shown, before the inkjet fabric 400 enters the coloring link, the reverse side of the printed picture of the inkjet fabric 400 is made to contact the first over-roller 13, avoiding the side with the printed picture from touching the first over-roller 13. Compared with the traditional coloring box 200, this structure can effectively prevent the picture from contaminating the over-roller during the working process.

[0086] As known from the background art, when the color developing box 200 works, there is a large temperature difference inside and outside the color developing box 200, which will cause strong air convection. To weaken the air convection and maintain the stability of the temperature field inside the color developing device, refer to Figure 10 and Figure 11 As shown, a partition 26 is fixed on the inner cavity of the color developing box 200. The partition 26 is fixed on one side or opposite sides of the inner cavity of the color developing box 200, and air holes 261 for gas flow are provided on the partition 26; when the partition 26 is fixed on opposite sides of the inner cavity of the color developing box 200, there is a gap 27 for the spraying cloth 400 to pass through between the two oppositely arranged partitions 26.

[0087] The two partitions 26 are fixed to the inner wall of the color developing box 200 by welding or screws, and a gap 27 for the partition 26 is reserved in the middle for the spraying cloth 400 to pass through. At the same time, a number of air holes 261 are opened on the partition 26 to allow the convective air flow to pass through. With this structure, the air convection inside the color developing box 200 is effectively weakened, and the stability of the temperature field inside the color developing device is maintained.

[0088] As an optional implementation manner, refer to Figure 9 and Figure 10 As shown, an annular groove 24 is provided at the bottom of the inner cavity of the color developing box 200. The annular groove 24 is used to accommodate the oil droplets flowing down from the smoke exhaust device 100, and an oil drain hole 25 is provided at the bottom of the annular groove 24.

[0089] At the outlet 17 of the cloth outlet 29 of the color developing box 200, a convex structure is processed by sheet metal working. An annular groove 24 is formed between the convex and the inner wall of the color developing device. The annular groove 24 can collect the liquid waste oil generated during the color developing process, prevent the waste oil from dropping onto the spraying cloth 400, and prevent the cloth surface from being polluted. When the waste oil in the groove accumulates to a certain extent, the waste oil can be discharged through the oil drain hole provided at the bottom of the groove.

[0090] Specifically, in combination with Figure 4 , Figure 7 and Figure 9 As shown, the oil droplets in the smoke exhaust device 100 flow along the inclined diversion wall 4 to the inner wall of the color developing box 200 and flow into the annular groove 24 along the inner wall of the color developing box 200, preventing the cloth surface from being polluted.

[0091] As Figure 9 and Figure 10 As shown, when the color developing box 200 works, a stable high-temperature environment needs to be maintained inside the box to ensure the reliable progress of the color developing work. However, the color developing box 200 has large length, width and height dimensions, and there is a significant temperature difference between the inside and outside of the box. If not handled, serious heat dissipation problems will occur, which will affect the normal development of the color developing work. Therefore, the primary task is to solve the heat dissipation problem inside the color developing box 200.

[0092] To solve the heat dissipation problem inside the color developing box 200, one of the measures is as follows:

[0093] Refer to Figures 8 - 10 As shown, a heating part and a temperature sensor 23 are fixed inside the color developing box 200, where: the heating part is arranged at intervals along the length direction and / or the width direction of the color developing box 200; the temperature sensor 23 is arranged at intervals along the length direction and / or the width direction of the color developing box 200; a heat insulation layer 19 is fixed on the side wall of the color developing box 200 and / or the smoke exhaust device 100.

[0094] The heating part can be a heating tube 22, such as an electric heating tube 22. The heating tube 22 and the temperature sensor 23 are respectively installed on corresponding brackets 28, and the brackets 28 are fixed on the inner wall of the color developing box 200 by welding.

[0095] Refer to Figure 8 and Figure 11 As shown, a number of heating tubes 22, such as electric heating tubes 22 (7 - 10 pieces), are arranged inside the color developing box 200 to achieve heating of the color developing box 200. To ensure the stability of the internal temperature of the color developing box 200 to the greatest extent, a total of 6 temperature sensors 23 (the number is not limited) are installed at the upper, middle, and lower positions on both the left and right sides of the color developing box 200. During the operation of the color developing box 200, the operator can complete temperature regulation according to the actual temperature feedback by the temperature sensor 23.

[0096] Embodiment 3:

[0097] Refer to Figure 2 As shown, in the structure of the non-contact color developing box in the prior art, strong air convection will be formed between the external cold air and the high-temperature gas inside the color developing box at the top gap of the color developing box. If this phenomenon is not dealt with, the temperature field along the length direction inside the color developing box will be uneven. This uneven temperature field will cause the color fastness of the developed picture to be poor, and obvious color differences will appear along the length direction of the color developing box, ultimately resulting in a decline in the quality of the developed picture. For details, refer to Figure 2 . Such as Figure 2As shown in the figure, the arrow direction in the figure indicates the flow path of the air; when the cloth is coloring, the temperature inside the coloring box 200' is significantly higher than the temperature of the external environment. Under the action of this temperature difference, the external cold air will enter from the upper gap of the coloring box 200', lowering the temperature on the left side of the coloring box 200'; at the same time, the hot air in the coloring box 200' flows out from the right side, making the temperature on the right side of the coloring box higher. This temperature field imbalance caused by the flow of cold and hot air is particularly obvious in winter when the ambient temperature is low. The uneven temperature field in the coloring box 200' will directly lead to poor coloring quality of the picture. Of course, the air convection diagram in the figure is only for illustration. In actual situations, the flow direction of the air is restricted by the structural dimensions of the coloring box. Specifically, changes in the length, width, and height of the coloring box will cause changes in the direction of air convection. However, no matter how the structural dimensions of the coloring box change, the air convection caused by the temperature difference always exists. If this convection is not controlled, its negative impact on the coloring quality will be very significant.

[0098] For the above questions, see Figure 3 , Figure 4 and Figures 8 - 12 As shown, the color development box assembly also includes a preheating box 300, which is fixed to the bottom of the color development box 200. The preheating box 300 and the color development box 200 are separated only by a heat conduction plate 5. The preheating box 300 has a preheating chamber 15 connected to the cloth outlet 29 of the color development box 200, and the color development box 200 heats the air in the preheating chamber 15 through the heat conduction plate 5; the second roller 14 is located in the preheating chamber 15, and an outlet 17 is provided on the side wall of the preheating box 300; and an insulation layer 18 is fixed on the side wall of the preheating box 300.

[0099] The preheating box 300 is firmly fixed on the coloring box 200 by a plurality of screws. A square hole is respectively provided on both sides of the preheating box 300, and the second roller 14 passes through both ends thereof and is installed on the side vertical plate through the two square holes.

[0100] As an optional implementation, second brushes 16 are fixed on both sides outside the outlet 17 , and the distance between the two groups of second brushes 16 is smaller than the width of the outlet 17 , or the two groups of second brushes 16 are in contact with each other.

[0101] As mentioned above, there is a significant temperature difference between the inside and outside of the coloring box 200. If it is not handled, serious heat dissipation problems will occur, thereby affecting the normal development of the coloring work. Therefore, the first task is to solve the heat dissipation problem inside the coloring box 200.

[0102] In order to solve the heat dissipation problem inside the color box 200, another means is:

[0103] The preheating box 300 of this embodiment is made of sheet metal, and high-temperature resistant rubber for heat insulation is pasted on its inner wall, which can effectively reduce heat dissipation. The preheating box 300 and the color developing box 200 are only spaced apart by a heat conducting plate 5 (such as a thin steel plate). The heat generated by the color developing box 200 can pass through the heat conducting plate 5 to heat the air in the preheating cavity 15. During the operation of the color developing box 200, the smoke exhaust device 100 continuously extracts the oil fume in the color developing box 200, which requires timely replenishment of air from outside the color developing box 200. Refer to Figure 12 , a second brush 16 is provided at the outlet 17 of the preheating cavity 15. The distance between the two groups of second brushes 16 is less than the width of the outlet 17, or the two groups of second brushes 16 are in contact with each other. The second brush 16 is installed on the preheating box 300 by screws. Since the spray cloth 400 passing through this position has completed color development, in order to prevent a large amount of cold air from directly pouring in, the second brushes 16 are closely attached, so that the outside cold air can only enter the preheating cavity 15 through the gaps between the second brushes 16. In this way, the air entering the color developing device is preheated in the preheating cavity 15, thereby preventing a large fluctuation in the temperature in the color developing box 200 and ensuring the stable progress of the color development work.

[0104] An insulating layer 19 is filled in the sheet metal parts of the color developing box 200 and the smoke exhaust device 100, which can effectively block the heat from being conducted out through the side walls around the device, helping to maintain the stability of the temperature inside the color developing box 200.

[0105] The color developing box assembly of this embodiment has the following beneficial effects: the structure of the air duct in the smoke exhaust device 100 ensures the stable and balanced negative pressure in the oil fume collection cavity 8, has no oil fume leakage, and has a good smoking effect. The temperature field in the color developing box 200 is stable, the color fastness of the developed pattern is good, and the color difference is uniform. The smoke exhaust device 100 and the color developing box 200 are convenient to disassemble and clean.

[0106] In the description of this specification, specific features, structures or characteristics can be combined in a suitable manner in any one or more embodiments or examples.

[0107] In the description of this specification, the description with reference to terms such as "one embodiment", "some embodiments", "example", "specific example", or "some examples" means that the specific features, structures, materials or characteristics described in connection with the embodiment or example are included in at least one embodiment or example of the present invention. In this specification, the schematic expressions of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in a suitable manner in any one or more embodiments or examples. In addition, without contradiction, those skilled in the art can combine and combine the different embodiments or examples described in this specification and the features of different embodiments or examples.

[0108] The above are only specific embodiments of the present invention, but the protection scope of the present invention is not limited thereto. Any person skilled in the art within the technical scope disclosed by the present invention can easily think of changes or substitutions, which should all be covered within the protection scope of the present invention. Therefore, the protection scope of the present invention shall be subject to the protection scope of the claims described above.

Claims

1. A smoke exhaust device, characterized in that: It includes a shell, a fume collecting chamber and an air duct located inside the shell, wherein the air duct includes a grid hole air duct, a wall hole air duct and a main air duct, wherein: A grid hole communicating with the oil fume collecting chamber is provided on one side wall of the grid hole air duct, and the grid hole air duct is divided into two or more sections along the length direction of the oil fume collecting chamber; The wall hole air duct is connected to all the grid hole air ducts located on the same side of the oil fume collecting chamber; The main air duct is connected to the negative pressure device, and the air inlet of the main air duct is connected to the middle part of the corresponding wall hole air duct.

2. The smoke exhaust device according to claim 1, characterized in that: The grid hole air duct is divided into four or more zones along the length direction of the oil fume collecting chamber; The grid hole air duct and the wall hole air duct extend to opposite ends of the oil fume collecting chamber and are equal in length to the oil fume collecting chamber, wherein the oil fume collecting chamber extends to both ends of the color box; The air ducts are distributed on two opposite sides of the oil fume collecting chamber and are symmetrically arranged about the axis of the oil fume collecting chamber.

3. The smoke exhaust device according to claim 1, characterized in that: Two adjacent and independent grid hole air ducts are separated by a partition plate, and the grid holes are evenly arranged on the corresponding side walls of the grid hole air duct; A wall hole connected to the wall hole air duct is provided on the other side wall of the grid hole air duct; A through hole is provided in the middle of the corresponding side wall of the wall hole air duct, and the through hole is connected to the main air duct.

4. The smoke exhaust device according to claim 3, characterized in that: In all the grid hole air ducts located on the same side of the oil fume collecting chamber, the number of the grid holes gradually increases in the direction away from the air inlet of the main air duct, and / or the aperture of the grid holes gradually increases; In all the grid hole air ducts located on the same side of the oil fume collecting chamber, the apertures of the wall holes gradually increase in a direction away from the air inlet of the main air duct.

5. The smoke exhaust device according to claim 1, characterized in that: The smoke exhaust device further comprises an inclined guide wall, which is located at two opposite sides of the oil smoke collecting chamber and is configured as a chamber wall of the oil smoke collecting chamber; The horizontal distance between the two inclined guide walls gradually increases from top to bottom, so that the oil smoke collecting chamber is a conical chamber, and the cross-sectional area of ​​the conical chamber gradually increases from top to bottom; An annular groove is arranged below the inclined guide wall. The annular groove is located in the color box and is used to accommodate oil droplets flowing down along the inclined guide wall.

6. The smoke exhaust device according to claim 1 or 5, characterized in that: The top of the smoke exhaust device is provided with a cloth inlet, and the top of the smoke exhaust device is fixed with a first brush, wherein: The first brushes are located above the fabric inlet and distributed on two opposite sides of the fabric inlet. The distance between two groups of the first brushes is smaller than the width of the fabric inlet, or the two groups of the first brushes are in contact with each other.

7. The smoke exhaust device according to claim 1, characterized in that: The smoke exhaust device is provided with a lock and a handle, wherein the lock is detachably fixedly connected to the color development box; A high temperature resistant sealing strip is arranged on the contact surface between the smoke exhaust device and the color development box.

8. A color box assembly, characterized in that: It comprises a color box and a smoke exhaust device according to any one of claims 1 to 7, wherein the smoke exhaust device is detachably fixed to the top of the color box, and the oil fume collecting chamber is connected to the color box; A first roller is arranged above the cloth inlet of the smoke exhaust device, and a second roller is arranged below the cloth outlet of the color box. The first roller can contact the back side of the printed picture of the inkjet cloth, and the second roller contacts the printed picture of the inkjet cloth, and makes the inkjet cloth pass through the smoke exhaust device and the color box in sequence.

9. The color box assembly according to claim 8, characterized in that: A partition is fixed on the inner cavity of the color development box, the partition is fixed on one side or two opposite sides of the inner cavity of the color development box, and air holes for gas circulation are arranged on the partition; When the partitions are fixed to the two opposite sides of the inner cavity of the color box, there is a gap between the two oppositely arranged partitions for the inkjet printing cloth to pass through.

10. The color box assembly according to claim 8, characterized in that: The bottom of the inner cavity of the color box is provided with an annular groove, the annular groove is used to accommodate the oil droplets flowing down from the smoke exhaust device, and the bottom of the annular groove is provided with an oil discharge hole.

11. The color box assembly according to claim 8, characterized in that: A heating unit and a temperature sensor are fixed in the color development box, wherein: The heating parts are arranged at intervals along the length direction and / or width direction of the color box; The temperature sensors are arranged at intervals along the length direction and / or width direction of the color development box; A heat insulation layer is fixed on the side wall of the color box and / or the smoke exhaust device.

12. The color box assembly according to claim 8, characterized in that: The color development box assembly also includes a preheating box, which is fixed to the bottom of the color development box, and is spaced apart from the color development box only by a heat conduction plate, and has a preheating chamber connected to the cloth outlet of the color development box, and the color development box heats the air in the preheating chamber through the heat conduction plate; The second roller is located in the preheating chamber, and an outlet is provided on the side wall of the preheating box; A heat-insulating layer is fixed on the side wall of the preheating box.

13. The color box assembly according to claim 12, characterized in that: Second brushes are fixed on both sides of the outlet, and the distance between two groups of the second brushes is smaller than the width of the outlet, or the two groups of the second brushes are in contact with each other.

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