Fan system and air cabinet for printing equipment

Abstract

The utility model discloses a fan system and an air cabinet for printing equipment, and relates to the technical field of printing, the fan system comprises a first main air pipe and at least two fans, the fans are variable-frequency centrifugal fans, air outlets of the fans are communicated with the printing equipment through a second air pipe, the side wall of the second air pipe is communicated with one end of a first branch air pipe, and the other end of the first branch air pipe is communicated with a second branch air pipe. The other end of the first branch air pipe is communicated with one end of the first main air pipe, the other end of the first main air pipe is communicated with printing equipment, a valve is arranged at the joint of the first branch air pipe and the second air pipe, and the valve enables an air outlet of the fan to be communicated with an air outlet of the second air pipe or enables the air outlet of the fan to be communicated with an air outlet of the first branch air pipe. By replacing a sliding vane type fan with the centrifugal fan, the maintenance cost is saved, all the fans are connected in parallel through the first main air pipe, the power of all the fans can be adjusted, and the air volume requirements of the printing equipment under various loads can be met.

Description

Technical Field

[0001] This utility model relates to the field of printing technology, and in particular to a fan system and air handling unit for printing equipment. Background Technology

[0002] During the operation of printing equipment, fans are indispensable, from basic equipment heat dissipation and ink drying to core paper conveying control, printing quality assurance, and environmental and safety requirements. However, existing printing equipment fans usually use vane fans. Vane fans achieve the process of air intake, compression, and exhaust by the reciprocating motion of vanes on the inner wall of the cylinder. In this process, the vanes rub against the inner wall of the cylinder, causing wear and tear on the vanes, requiring frequent replacement. Each replacement requires stopping the machine, which is not economical. In addition, existing fans are usually fixed-frequency fans, and the air volume is difficult to meet the air volume requirements under various loads. Utility Model Content

[0003] The purpose of this utility model is to provide a fan system and air handling unit for printing equipment to solve the problems existing in the prior art, reduce downtime, save maintenance costs, and meet the air volume requirements of printing equipment under various loads.

[0004] To achieve the above objectives, this utility model provides the following solution:

[0005] This utility model provides a fan system for printing equipment, including a first main air duct and at least two fans. The fans are variable frequency centrifugal fans. The air outlet of the fans is connected to the printing equipment through a second air duct. One end of the side wall of the second air duct is connected to a first branch air duct. The other end of the first branch air duct is connected to one end of the first main air duct. The other end of the first main air duct is connected to the printing equipment. A valve is provided at the connection between the first branch air duct and the second air duct. The valve can connect the air outlet of the fans to the air outlet of the second air duct, or connect the air outlet of the fans to the air outlet of the first branch air duct.

[0006] In some embodiments, a check valve is provided on the second duct, and an opening is provided on the side wall of the second duct. The end of the first branch duct away from the first main duct is connected to the opening. The check valve is located between the opening and the fan, and the check valve can prevent airflow from flowing back into the fan.

[0007] In some embodiments, each of the first branch ducts is equipped with an air volume sensor and an air pressure sensor.

[0008] This utility model provides a blower box for printing equipment, including a blower box body, wherein the blower described in any of the above-mentioned items is disposed in the blower box body.

[0009] In some embodiments, the blower cabinet body is provided with multiple layers of frames, and the blower can be installed on any layer of the frame. The second air duct passes through the side wall of the blower cabinet body and communicates with the printing equipment.

[0010] In some embodiments, a controller is provided on the side wall of the blower body, and the controller is connected to the blower and the valve signal respectively.

[0011] In some embodiments, a hood is provided on the top of the blower body, which can connect the inside of the blower body with the outside to facilitate the exchange of air between the inside and outside of the blower body.

[0012] In some embodiments, sound insulation cotton is provided on the inner side wall of the blower body.

[0013] In some embodiments, ventilation grilles are provided on the side walls and bottom walls of the air handling unit, and ventilation openings are provided in the areas corresponding to the ventilation grilles of the sound insulation cotton.

[0014] In some embodiments, a shock-absorbing pad is provided between the frame and the fan.

[0015] The present invention achieves the following technical advantages over the prior art:

[0016] This utility model provides a fan system and air handling unit for printing equipment. By replacing the vane fan with a centrifugal fan, the centrifugal fan generates centrifugal force through a high-speed rotating impeller, converting the kinetic energy of the gas into pressure energy, thereby realizing gas delivery and pressurization. When the impeller rotates, the wear on components such as bearings and impellers is minimal, the replacement and maintenance cycle is longer, reducing downtime and saving maintenance costs. Furthermore, the fans are connected in parallel through a first main air duct, and the air outlet of the fan can be connected to the air outlet of the first branch air duct through a control valve, so that the gas generated by each fan is collected in the first main air duct and flows to the printing equipment. The power of each fan is adjustable, which can meet the air volume requirements of the printing equipment under various loads.

[0017] Furthermore, by setting up a variable frequency centrifugal fan, the fan power can be adjusted according to the air volume demand, eliminating the need for the fan to operate at full load and saving energy. The noise of a centrifugal fan is primarily aerodynamic noise, which is lower than that of a vane fan, which is primarily mechanical noise. Moreover, centrifugal fans generate centrifugal force through a high-speed rotating impeller, making them less sensitive to impurities such as toner in the printing workshop air. In contrast, impurities such as toner in the air can exacerbate wear between the vanes and the cylinder in a vane fan. Furthermore, centrifugal fans can significantly increase air volume by increasing the rotation speed, while vane fans are limited by cylinder volume, so even with increased rotation speed, the increase in air volume is limited. Attached Figure Description

[0018] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0019] Figure 1 This is a schematic diagram of the fan system in one embodiment of this invention;

[0020] Figure 2 This is a schematic diagram of the blower body structure in one embodiment of this invention;

[0021] Figure 3 This is a schematic diagram of the internal structure of the blower body in one embodiment of this invention;

[0022] In the diagram: 11-First main air duct; 12-First branch air duct; 13-Second air duct; 14-Valve; 15-Check valve; 16-Air volume sensor; 17-Air pressure sensor; 2-Fan; 3-Air handling unit body; 31-Controller; 32-Cabinet door; 33-Air hood; 34-Ventilation grille; 4-Frame. Detailed Implementation

[0023] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0024] The purpose of this utility model is to provide a fan system and air handling unit for printing equipment to solve the problems existing in the prior art, save maintenance costs, and meet the air volume requirements of printing equipment under various loads.

[0025] To make the above-mentioned objectives, features and advantages of this utility model more apparent and understandable, the utility model will be further described in detail below with reference to the accompanying drawings and specific embodiments.

[0026] Example 1

[0027] This embodiment provides a fan system for printing equipment, such as... Figure 1As shown, the system includes a first main air duct 11 and at least two fans 2. The fans 2 are variable frequency centrifugal fans. The outlet of the fans 2 is connected to the printing equipment via a second air duct 13. One end of the side wall of the second air duct 13 is connected to one end of a first branch air duct 12, and the other end of the first branch air duct 12 is connected to one end of the first main air duct 11. The other end of the first main air duct 11 is connected to the printing equipment. A valve 14 is installed at the connection between the first branch air duct 12 and the second air duct 13. The valve 14 allows the outlet of the fans 2 to connect with the outlet of the second air duct 13, or to connect the outlet of the fans 2 with the outlet of the first branch air duct 12. This can be achieved by replacing the vane fan with a centrifugal fan. Centrifugal fans generate centrifugal force through a high-speed rotating impeller, converting the kinetic energy of gas into pressure energy to achieve gas delivery and pressurization. When the impeller rotates, there is very little wear on components such as bearings and impellers, resulting in longer replacement and maintenance cycles, reducing downtime and saving maintenance costs. Furthermore, each fan 2 is connected in parallel through the first main air duct 11, and the air outlet of the fan 2 can be connected to the air outlet of the first branch air duct 12 through the control valve 14, so that the gas generated by each fan 2 is collected in the first main air duct 11 and flows to the printing equipment. The power of each fan 2 is adjustable, which can meet the air volume requirements of the printing equipment under various loads.

[0028] Furthermore, by setting up a variable frequency centrifugal fan, the fan power can be adjusted according to the air volume demand, eliminating the need for the fan to operate at full load and saving energy. The noise of a centrifugal fan is primarily aerodynamic noise, which is lower than that of a vane fan, which is primarily mechanical noise. Moreover, centrifugal fans generate centrifugal force through a high-speed rotating impeller, making them less sensitive to impurities such as toner in the printing workshop air. In contrast, impurities such as toner in the air can exacerbate wear between the vanes and the cylinder in a vane fan. Furthermore, centrifugal fans can significantly increase air volume by increasing the rotation speed, while vane fans are limited by cylinder volume, so even with increased rotation speed, the increase in air volume is limited.

[0029] In some implementations of this embodiment, such as Figure 1 As shown, valve 14 is a hinged valve plate installed at the connection between the first branch duct 12 and the second duct 13. The hinged valve plate can block the first branch duct 12, so that gas is transported from the outlet of the fan 2 to the outlet of the second duct 13, or block the second duct 13, so that gas is transported from the outlet of the fan 2 to the outlet of the first branch duct 12, and then to the first main duct 11.

[0030] In some embodiments of this example, the hinged valve plate is controlled by a drive motor. When the drive motor controls the hinged valve plate to rotate to the first position, the hinged valve plate can block the first branch duct 12, so that gas is delivered from the outlet of the fan 2 to the outlet of the second duct 13. When the drive motor controls the hinged valve plate to rotate to the second position, the hinged valve plate can block the second duct 13, so that gas is delivered from the outlet of the fan 2 to the outlet of the first branch duct 12, and then delivered into the first main duct 11.

[0031] In some embodiments of this example, valve 14 includes a first valve disposed on the first branch duct 12 and a second valve disposed on the second duct 13. The second valve is disposed between the connection between the first branch duct 12 and the second duct 13 and the printing equipment. By controlling the first valve to open and the second valve to close, gas is transported from the outlet of the fan 2 to the outlet of the first branch duct 12 and then to the first main duct 11. By controlling the first valve to close and the second valve to open, gas is transported from the outlet of the fan 2 to the outlet of the second duct 13.

[0032] In some implementations of this embodiment, such as Figure 1 As shown, a check valve 15 is installed on the second air duct 13. An opening is provided on the side wall of the second air duct 13. The end of the first branch air duct 12 away from the first main air duct 11 is connected to the opening. The check valve 15 is located between the opening and the fan 2. The check valve 15 can prevent airflow from flowing back into the fan 2, avoid the impeller in the fan 2 from being driven to rotate in the opposite direction by the backflow airflow and causing impact on the bearing, and further reduce the wear on the bearing.

[0033] In some implementations of this embodiment, such as Figure 1 As shown, each of the first branch ducts 12 is equipped with an airflow sensor 16 and an air pressure sensor 17. The airflow sensor 16 contains a heating element (such as a platinum resistance thermometer) and a temperature detection element. When gas flows through it, it carries away the heat from the heating element, causing its temperature to drop. The airflow is calculated by detecting the temperature change, and the airflow is obtained by combining the cross-sectional area. The silicon diaphragm inside the air pressure sensor 17 deforms under pressure, causing a change in resistance. The air pressure value is obtained by measuring the change in resistance using a bridge circuit. By measuring the airflow and air pressure on the second branch duct, the airflow and air pressure values ​​flowing through the first main duct 11 can be inferred, so as to determine whether the airflow in the first main duct 11 meets the airflow requirements under the set load.

[0034] Example 2

[0035] This embodiment provides a blower unit for printing equipment, such as... Figures 2-3As shown, the fan 2 and the air handling unit body 3 are both located inside the air handling unit body 3, so as to facilitate a unified frequency conversion control system for the fan 2. The total air volume can be adjusted in real time according to the printing load to meet the air volume requirements of the printing equipment under various loads. It also allows maintenance personnel to perform operations such as bearing lubrication and motor testing at the air handling unit, further saving maintenance costs.

[0036] In some implementations of this embodiment, such as Figures 2-3 As shown, the blower body 3 is provided with multiple layers of frame 4. The blower 2 can be installed on any layer of frame 4. The second air duct 13 passes through the side wall of the blower body 3 and connects to the printing equipment. The first main air duct 11 and the first branch air duct 12 are both located on the outside of the blower body 3. This arrangement can reduce the number of openings on the side wall of the blower body 3, thereby saving processing costs.

[0037] In some implementations of this embodiment, such as Figures 2-3 As shown, the first branch duct 12 and the second duct 13 both pass through the side wall of the air handling unit 3 and are connected to the printing equipment. Alternatively, the first branch duct 12 can be installed inside the air handling unit 3, and the first main duct 11 and the second duct 13 both pass through the side wall of the air handling unit 3 and are connected to the printing equipment.

[0038] In some implementations of this embodiment, such as Figures 2-3 As shown, a controller 31 is provided on the side wall of the air handling unit body 3. The controller 31 is connected to the fan 2 and the valve 14 respectively. By connecting the controller 31 to the fan 2 and the valve 14 respectively, the power of each fan 2 is adjusted according to the air volume requirement under the set load, and the valve 14 is controlled to connect the air outlet of the fan 2 to the air outlet of the second air duct 13, or to connect the air outlet of the fan 2 to the air outlet of the first branch air duct 12.

[0039] In some implementations of this embodiment, such as Figures 2-3 As shown, an inspection port is provided on the side wall of the air handling unit body 3, and an openable cabinet door 32 is provided on the inspection port. The controller 31 is installed on the cabinet door 32. When the fan 2 is running normally, the cabinet door 32 is closed. The controller 31 controls the start and stop and power of each fan 2. When the fan 2 needs maintenance, the cabinet door 32 is opened, and maintenance personnel can perform maintenance on the fan 2 inside the air handling unit body 3 through the inspection port.

[0040] In some embodiments of this example, the controller 31 is also connected to the air volume sensor 16 and the air pressure sensor 17 respectively. The air volume sensor 16 feeds back the measured air volume value to the controller 31, and the air pressure sensor 17 feeds back the measured air pressure value to the controller 31. The controller 31 determines whether the air volume in the first main air duct 11 meets the air volume requirement under the set load based on the measured air volume value and air pressure value, and adjusts the power of each fan 2 to adjust the air volume in the first main air duct 11.

[0041] In some implementations of this embodiment, such as Figures 2-3 As shown, a hood 33 is provided on the top of the blower body 3. The hood 33 can connect the inside of the blower body 3 with the outside, so as to facilitate the exchange of air between the inside and outside of the blower body 3. When the blower 2 is started, if the gas pressure inside the blower body 3 is too low, the air outside the blower body 3 will be transported to the inside of the blower body 3 as soon as possible through the hood 33.

[0042] In some embodiments of this example, the end of the hood 33 facing the outside of the air handling unit 3 is connected to the outside through a ventilation duct so as to provide sufficient air to the inside of the air handling unit 3.

[0043] In some implementations of this embodiment, such as Figures 2-3 As shown, the fan hood 33 is a conical barrel. The end of the fan hood 33 facing the outside of the fan cabinet body 3 has a small opening, which is connected to the outside through a ventilation duct to provide sufficient air to the inside of the fan cabinet body 3. The end of the fan hood 33 facing the inside of the fan cabinet body 3 has a large opening to allow air to diffuse into the cabinet.

[0044] In some embodiments of this example, sound insulation cotton is provided on the inner wall of the blower body 3 to reduce the noise transmitted from the blower 2 to the outside of the blower body 3 and improve the workshop operating environment.

[0045] In some implementations of this embodiment, such as Figures 2-3 As shown, ventilation grilles 34 are provided on the side walls and bottom walls of the blower body 3. The sound insulation cotton has ventilation holes in the corresponding areas of the ventilation grilles 34. By setting the ventilation grilles 34, the air flow inside and outside the blower body 3 is further enhanced, and it is also conducive to the heat dissipation of the motor in the blower 2.

[0046] In some embodiments of this example, a shock-absorbing pad is provided between the frame 4 and the fan 2 to absorb the vibration generated during the operation of the fan 2 and avoid resonance between the fan 2 and the fan cabinet body 3.

[0047] In some embodiments of this example, a shock-absorbing pad is also provided at the support where the fan 2 contacts the ground to absorb the vibration transmitted by the fan cabinet body 3 and further reduce the noise in the workshop.

[0048] This utility model uses specific examples to illustrate its principles and implementation methods. The above description of the embodiments is only for the purpose of helping to understand the method and core idea of ​​this utility model. At the same time, for those skilled in the art, there will be changes in the specific implementation methods and application scope based on the idea of ​​this utility model. In summary, the content of this specification should not be construed as a limitation of this utility model.

Claims

1. A fan system for a printing apparatus, characterized by, The system includes a first main air duct and at least two fans, wherein the fans are variable frequency centrifugal fans. The air outlet of the fans is connected to the printing equipment through a second air duct. One end of the second air duct is connected to a first branch air duct on its side wall. The other end of the first branch air duct is connected to one end of the first main air duct. The other end of the first main air duct is connected to the printing equipment. A valve is provided at the connection between the first branch air duct and the second air duct. The valve can connect the air outlet of the fans to the air outlet of the second air duct, or connect the air outlet of the fans to the air outlet of the first branch air duct.

2. The air fan system for a printing apparatus according to claim 1, wherein The second air duct is equipped with a check valve, and an opening is provided on the side wall of the second air duct. The end of the first branch air duct away from the first main air duct is connected to the opening. The check valve is located between the opening and the fan. The check valve can prevent airflow from flowing back into the fan.

3. The air fan system for a printing apparatus according to claim 1, wherein Each of the first branch ducts is equipped with an air volume sensor and an air pressure sensor.

4. An air cabinet for a printing apparatus, characterized by Includes the air handling unit body, and the fan described in any one of claims 1 to 3 is disposed within the air handling unit body.

5. The air cabinet for a printing apparatus according to claim 4, characterized by The air handling unit has multiple layers of frames, and the fan can be installed on any layer of the frame. The second air duct passes through the side wall of the air handling unit and connects to the printing equipment.

6. The air cabinet for a printing apparatus according to claim 4, characterized by A controller is installed on the side wall of the blower body, and the controller is connected to the blower and the valve respectively.

7. The air cabinet for a printing apparatus according to claim 4, characterized by The top of the blower body is provided with a hood, which can connect the inside of the blower body with the outside to facilitate the exchange of air between the inside and outside of the blower body.

8. The air cabinet for a printing apparatus according to claim 4, characterized by The inner wall of the blower unit is equipped with sound insulation cotton.

9. The air cabinet for a printing apparatus according to claim 8, characterized by Ventilation grilles are provided on the side and bottom walls of the air handling unit, and ventilation openings are provided in the area corresponding to the ventilation grilles of the sound insulation cotton.

10. The air cabinet for a printing apparatus according to claim 5, characterized by A shock-absorbing pad is provided between the frame and the fan.

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