Liquid dispensing device, liquid dispensing system, liquid dispensing method and program

Abstract

This disclosure provides a liquid dispensing device capable of suppressing fluctuations in indoor air pressure. [Solution] A liquid discharge device 100 installed in a room equipped with an air supply device and an exhaust device comprises an exhaust target EO, an exhaust pipe 150, an adjustment unit 160, and a control unit. The exhaust target EO includes an imaging unit 130 that discharges liquid onto a target to form an image. The exhaust pipe 150 connects the exhaust target EO and the exhaust device. The adjustment unit 160 has a configuration that allows adjustment of the amount of exhaust passing through the exhaust pipe 150. The control unit controls the adjustment unit 160 according to the operating state of the exhaust target EO to adjust the amount of exhaust, and also sets the amount of outside air supplied from outside to inside by the air supply device and the amount of inside air exhausted from inside to outside by the exhaust device.

Description

Technical Field

[0001] The present disclosure relates to a liquid ejection apparatus, a liquid ejection system, a liquid ejection method, and a program.

Background Art

[0002] Conventionally, there has been known a substrate developing apparatus that performs development processing by supplying a developer to a thin plate-shaped substrate such as a semiconductor substrate or a liquid crystal glass substrate. For example, the substrate developing apparatus described in Japanese Patent Laid-Open No. 11-087226 includes a fan, an exhaust damper, and a control unit. The control unit controls the fan and the exhaust damper to adjust an intake amount by the fan and an exhaust amount by the exhaust damper.

[0003] Specifically, in a developer supply step and a development step, the control unit stops the intake by the fan and the exhaust by the exhaust damper, so that no downflow is formed in a cup inside a processing chamber. Further, in a cleaning step and a drying step, the control unit performs exhaust from the cup through the exhaust damper, and also performs intake by the fan in an amount equal to the exhaust amount, thereby forming a downflow inside the cup.

Summary of the Invention

Problem to be Solved by the Invention

[0004] In the substrate developing apparatus described in the aforementioned Japanese Patent Laid-Open No. 11-087226, exhaust performed by the exhaust damper may reduce the atmospheric pressure in the room where the substrate developing apparatus is installed.

[0005] The present disclosure provides a liquid ejection apparatus capable of suppressing atmospheric pressure fluctuation in a room.

Means for Solving the Problem

[0006] Embodiments of the present disclosure provide a liquid dispensing device installed in a room equipped with an air supply device and an exhaust device, comprising: an exhaust target including an imaging unit that dispenses liquid onto an object to form an image; an exhaust pipe connecting the exhaust target and the exhaust device; an adjustment unit capable of adjusting the amount of exhaust passing through the exhaust pipe; and a control unit that controls the adjustment unit according to the operating state of the exhaust target to adjust the amount of exhaust, and sets the amount of outside air supplied from outside to inside the room by the air supply device and the amount of inside air exhausted from inside to outside by the exhaust device. [Effects of the Invention]

[0007] According to embodiments of this disclosure, a liquid dispensing device capable of suppressing indoor pressure fluctuations can be provided. [Brief explanation of the drawing]

[0008] [Figure 1] This is a schematic plan view of the liquid dispensing device and liquid dispensing system of Embodiment 1. [Figure 2] This is a schematic cross-sectional view showing an example of a liquid dispensing device according to Embodiment 1. [Figure 3] This is a schematic cross-sectional view showing an example of a drying apparatus according to Embodiment 1. [Figure 4] This is a block diagram showing an example of the control unit of Embodiment 1. [Figure 5] This is a functional block diagram showing an example of the control unit of Embodiment 1. [Figure 6] This is a flow diagram of the liquid dispensing method of Embodiment 1. [Figure 7] This is a schematic cross-sectional view showing a modified example 1 of the liquid dispensing device of Embodiment 1. [Figure 8] This is a schematic cross-sectional view showing a modified example 2 of the liquid dispensing device of Embodiment 1. [Figure 9] This is a schematic cross-sectional view showing an example of a liquid dispensing device according to Embodiment 2. [Figure 10] This is a functional block diagram showing an example of the control unit of Embodiment 2. [Figure 11] This is a flow chart of the liquid discharge method of Embodiment 2. [Figure 12] This is a schematic cross-sectional view showing a part of the liquid dispensing system of Embodiment 3. [Modes for carrying out the invention]

[0009] Hereinafter, embodiments of the liquid dispensing device, liquid dispensing system, liquid dispensing method, and program relating to this disclosure will be described with reference to the drawings.

[0010] [Embodiment 1] Figure 1 is a schematic plan view of the liquid dispensing device 100 and liquid dispensing system 1 according to this embodiment. The liquid dispensing system 1 of this embodiment comprises a liquid dispensing device 100 and a supply and exhaust device 200. The liquid dispensing device 100 includes a control unit 110. The supply and exhaust device 200 includes an air supply device 210 and an exhaust device 220. In the illustrated example, the supply and exhaust device 200 further includes a supply and exhaust control unit 230.

[0011] The liquid ejection device 100 is an inkjet recording device that prints by ejecting ink of the required color onto an object to which liquid can adhere, as described later. The liquid ejection device 100 is installed, for example, in the room IR of a building or room R such as a factory or printing room, which is equipped with an air supply device 210 and an exhaust device 220. The liquid ejection device 100 is connected to the exhaust device 220 via, for example, an exhaust duct 240. As a result, air containing liquid mist generated at the exhaust target of the liquid ejection device 100, and air containing gas or water vapor generated when the liquid vaporizes, are discharged to the outside OR via the exhaust duct 240.

[0012] The control unit 110 of the liquid discharge device 100 and the supply and exhaust control unit 230 of the supply and exhaust device 200 are connected to each other via a wired or wireless communication line so that they can communicate with one another. In addition, in the example shown in Figure 1, the control unit 110 of the liquid discharge device 100 is connected to a pressure sensor PS that detects the indoor IR pressure.

[0013] The air supply device 210 supplies air from an outdoor area OR outside a room R where the liquid discharge apparatus 100 is installed to an indoor area IR where the liquid discharge apparatus 100 is installed via an air supply duct 250. The air supply device 210 is, for example, an air supply fan, an air supply damper, or a shutter capable of adjusting the flow rate of air supplied from the outdoor area OR to the indoor area IR.

[0014] The exhaust device 220 discharges air from the indoor area IR to the outdoor area OR via an exhaust duct 240. The exhaust device 220 is, for example, an exhaust fan, an exhaust damper, or a shutter capable of adjusting the flow rate of air discharged from the indoor area IR to the outdoor area OR. The exhaust device 220 is connected to the liquid discharge apparatus 100 via the exhaust duct 240, for example, and discharges air from an exhaust target inside the liquid discharge apparatus 100 to the outdoor area OR via the exhaust duct 240.

[0015] The air supply and exhaust control unit 230 controls the air supply device 210 to control an outside air supply amount, which is the flow rate of air supplied from the outdoor area OR to the indoor area IR. Specifically, when the air supply device 210 is an air supply fan, the air supply and exhaust control unit 230 controls the rotation speed of the air supply device 210 to control the outside air supply amount from the outdoor area OR to the indoor area IR. Furthermore, when the air supply device 210 is an air supply damper or a shutter, the air supply and exhaust control unit 230 controls the opening area of the air supply device 210 to control the outside air supply amount from the outdoor area OR to the indoor area IR.

[0016] Furthermore, the air supply and exhaust control unit 230 controls the exhaust device 220 to control an inside air exhaust amount, which is the flow rate of air discharged from the indoor area IR to the outdoor area OR. Specifically, when the exhaust device 220 is an exhaust fan, the air supply and exhaust control unit 230 controls the rotation speed of the exhaust device 220 to control the inside air exhaust amount from the indoor area IR to the outdoor area OR. Furthermore, when the exhaust device 220 is an exhaust damper or a shutter, the air supply and exhaust control unit 230 controls the opening area of the exhaust device 220 to control the inside air exhaust amount from the indoor area IR to the outdoor area OR.

[0017] A control unit 110 of the liquid ejection apparatus 100 transmits, for example, an outside air supply amount and an inside air exhaust amount set based on an exhaust amount corresponding to an operating state of an exhaust target of the liquid ejection apparatus 100, to a supply / exhaust control unit 230 of an air supply and exhaust apparatus 200. Accordingly, the control unit 110 of the liquid ejection apparatus 100 can control, via the supply / exhaust control unit 230 of the air supply and exhaust apparatus 200, an outside air supply amount from an outdoor OR to an indoor IR by an air supply apparatus 210, and an inside air exhaust amount from the indoor IR to the outdoor OR by an exhaust apparatus 220.

[0018] Figure 2 is a schematic cross-sectional view illustrating an example of the liquid ejection apparatus 100. In the illustrated example, the liquid ejection apparatus 100 includes a conveyance unit 120, an image forming unit 130, a drying unit 140, an exhaust pipe 150, and an adjustment unit 160.

[0019] The conveyance unit 120 is a conveyance device that is controlled by the control unit 110 and conveys continuous paper CF that is a target to which liquid can adhere. The conveyance unit 120 includes, for example, an original winding roller 121, a conveyance roller 122, a guide member 123, a discharge roller 124, and a winding roller 125.

[0020] The original winding roller 121 rotatably supports an original roll CR around which the continuous paper CF is wound. The conveyance roller 122 feeds out the continuous paper CF from the original roll CR and conveys the continuous paper CF. The guide member 123 guides the continuous paper CF to the image forming unit 130. The discharge roller 124 conveys and discharges the printed continuous paper CF. The winding roller 125 winds up the printed continuous paper CF.

[0021] The image forming unit 130 is controlled by the control unit 110 and includes a liquid ejection head 131 that ejects liquid onto the continuous paper CF which is a target to which liquid can adhere. The liquid ejection head 131 is, for example, a full-line head for four colors, and ejects liquids such as black (K), cyan (C), magenta (M), and yellow (Y) inks onto the continuous paper CF. The colors and the number of liquids ejected by the liquid ejection head 131 are not particularly limited. The image forming unit 130 is connected to an exhaust duct 240 via the exhaust pipe 150.

[0022] Figure 3 is a schematic cross-sectional view showing an example of the drying unit 140 shown in Figure 2. The drying unit 140 is controlled by the control unit 110 and is a device that dries the liquid discharged onto the continuous paper CF by the image-making unit 130. In the example shown in Figure 3, the drying unit 140 includes a heating unit 141, a transport roller 142, and a plurality of driven rollers 143.

[0023] The heating unit 141 heats the continuous paper CF that is transported from the image-making unit 130 into the heating unit 141 by the transport unit 120, drying the liquid discharged onto the continuous paper CF in the image-making unit 130. The transport roller 142 transports the continuous paper CF dried in the heating unit 141 toward the liquid discharge device on the back side or the winding roller 125 downstream of the drying unit 140. Multiple driven rollers 143 guide the continuous paper CF dried in the heating unit 141 around the transport roller 142.

[0024] More specifically, the heating unit 141 includes, for example, a housing 141a, a heat drum 141b, and a plurality of guide rollers 141c. The housing 141a houses and rotatably supports the heat drum 141b and the plurality of guide rollers 141c. The housing 141a is also connected to the exhaust duct 240 shown in Figure 2 via an exhaust pipe 150. The heat drum 141b heats the continuous paper CF to dry the liquid discharged onto the continuous paper CF. The plurality of guide rollers 141c guide the continuous paper CF around the heat drum 141b.

[0025] The exhaust pipe 150 is a conduit that connects the exhaust target EO to the exhaust device 220. In this embodiment, the exhaust target EO includes an image-forming section 130 and a drying section 140. The exhaust pipe 150 is provided, for example, inside the casing of the liquid discharge device 100 and is detachably connected to the exhaust duct 240 on the outside of the casing of the liquid discharge device 100. The exhaust pipe 150 connects the image-forming section 130 and the drying section 140, which are the exhaust target EO, to the exhaust device 220 of the supply and exhaust device 200 via the exhaust duct 240 shown in Figure 1.

[0026] Furthermore, the exhaust EO of the liquid discharge device 100 may include only one image-forming unit 130 or may include multiple image-forming units 130. Similarly, the exhaust EO of the liquid discharge device 100 may include only one drying unit 140 or may include multiple drying units 140. In addition, the exhaust EO may include devices other than the image-forming unit 130 and the drying unit 140.

[0027] The adjustment unit 160 is controlled by the control unit 110 and has a configuration that allows it to adjust the amount of exhaust gas passing through the exhaust pipe 150. The adjustment unit 160 is, for example, a shutter with an adjustable opening area. Alternatively, the adjustment unit 160 may be a damper or control valve with an adjustable opening area. The exhaust pipe 150 has a main pipe connected to the exhaust duct 240 and a plurality of branch pipes that branch off from the main pipe and are connected to each exhaust target EO. ​​The adjustment unit 160 is provided in each branch pipe of the exhaust pipe 150.

[0028] Figure 4 is a block diagram showing an example of the control unit 110 of the liquid discharge device 100 and the supply and exhaust control unit 230 of the supply and exhaust device 200.

[0029] The control unit 110 includes, for example, a CPU (Central Processing Unit) 110a, a ROM (Read Only Memory) 110b, a RAM (Random Access Memory) 110c, an NVRAM (Non-Volatile Random Access Memory) 110d, an input / output unit 110e, and a bus line 110f. Similarly, the intake and exhaust control unit 230 includes, for example, a CPU 230a, a ROM 230b, a RAM 230c, an NVRAM 230d, an input / output unit 230e, and a bus line 230f.

[0030] The control unit 110 controls various parts of the liquid dispensing device 100 by, for example, executing a program stored in the ROM 110b or NVRAM 110d by the CPU 110a. Specifically, the control unit 110 controls the transport unit 120 to drive the transport roller 122 and the discharge roller 124, intermittently transporting the continuous paper CF in the sub-operation direction, which is the transport direction. The control unit 110 also controls the image-forming unit 130 to dispensing liquid while intermittently moving the liquid dispensing head 131 in the main operation direction, thereby depositing the liquid at predetermined positions on the continuous paper CF and forming an image. Furthermore, the control unit 110 controls the drying unit 140 to heat the heat drum 141b and drive the transport roller 142.

[0031] Furthermore, the control unit 110 controls, for example, the adjustment unit 160 to adjust the amount of exhaust discharged from the exhaust target EO, and sets the amount of outside air supplied and the amount of inside air exhausted by the supply and exhaust device 200. The amount of outside air supplied is the flow rate of air supplied from the outdoor OR to the indoor IR by the supply device 210 of the supply and exhaust device 200. The amount of inside air exhaust is the flow rate of air exhausted from the indoor IR to the outdoor OR by the exhaust device 220 of the supply and exhaust device 200.

[0032] The air supply and exhaust control unit 230 controls the air supply device 210 and the exhaust device 220 by, for example, executing a program stored in the ROM 230b or NVRAM 230d by the CPU 230a. Specifically, the air supply and exhaust control unit 230 controls the air supply device 210 so that the flow rate of air supplied from the outdoor OR to the indoor IR by the air supply device 210 matches the amount of outside air supplied by the control unit 110 of the liquid discharge device 100. The air supply and exhaust control unit 230 also controls the exhaust device 220 so that the flow rate of air exhausted from the indoor IR to the outdoor OR by the exhaust device 220 matches the amount of indoor air exhausted by the control unit 110 of the liquid discharge device 100.

[0033] Figure 5 is a functional block diagram showing an example of the control unit 110 of the liquid discharge device 100. The control unit 110 includes, for example, an operating state determination unit 111, an exhaust volume adjustment unit 112, and an intake / exhaust volume setting unit 113. Each of these parts of the control unit 110 represents a function of the control unit 110 that is realized by the CPU 110a executing a program stored in the ROM 110b or NVRAM 110d.

[0034] The operating state determination unit 111 acquires the operating state of each exhaust target EO. ​​Specifically, if the first exhaust target EO1 is the image-making unit 130, the operating state determination unit 111 determines, based on the control state of the image-making unit 130 by the control unit 110, that the image-making unit 130 is in one of the following operating states: liquid discharge in progress (operating), standby, or stopped. Similarly, if the second exhaust target EO2 is the drying unit 140, the operating state determination unit 111 determines, based on the control state of the drying unit 140 by the control unit 110, that the drying unit 140 is in one of the following operating states: paper drying in progress (operating), standby, or stopped.

[0035] The exhaust volume adjustment unit 112 controls the adjustment unit 160 according to the operating state of each exhaust target EO determined by the operating state determination unit 111, thereby adjusting the amount of exhaust passing through the exhaust pipe 150 on which the adjustment unit 160 is installed. Specifically, the exhaust volume adjustment unit 112 controls the adjustment unit 160 installed in each branch pipe of the exhaust pipe 150 connected to each exhaust target EO according to the operating state of each exhaust target EO, thereby adjusting the amount of exhaust passing through each branch pipe in two or three stages. Alternatively, the exhaust volume adjustment unit 112 may control the adjustment unit 160 installed in each branch pipe of the exhaust pipe 150 so that the amount of exhaust passing through each branch pipe is approximately zero.

[0036] The exhaust volume adjustment unit 112 controls, for example, when the exhaust target EO is in operation, the corresponding adjustment unit 160 provided in the branch pipe of the exhaust pipe 150 connected to the exhaust target EO to adjust it to the maximum of two or three exhaust volumes. The maximum exhaust volume of the adjustment unit 160 may be the exhaust volume at the fully open opening area if the adjustment unit 160 is a shutter or damper. As a result, the exhaust volume from the exhaust target EO becomes the maximum of two or three exhaust volumes. Consequently, air containing liquid mist discharged from the liquid discharge head 131 of the image-making unit 130, and air containing gas vaporized by heating liquid in the drying unit 140, are effectively exhausted from the image-making unit 130 and the drying unit 140, which are the exhaust target EO.

[0037] Furthermore, the exhaust volume adjustment unit 112 controls the adjustment unit 160 corresponding to the exhaust target EO when the exhaust target EO is stopped, adjusting it to the minimum exhaust volume among two or three opening area settings. The minimum exhaust volume of the adjustment unit 160 may be the exhaust volume at the fully closed opening area if the adjustment unit 160 is a shutter or damper. Also, the exhaust volume adjustment unit 112 controls the adjustment unit 160 corresponding to the exhaust target EO when the exhaust target EO is in standby mode, adjusting it to the minimum of two settings or the middle of three settings. As a result, the exhaust volume from the exhaust target EO becomes the minimum of two or three settings or the middle of three settings, and the exhaust volume decreases compared to when the exhaust target EO is in operation.

[0038] The supply and exhaust volume setting unit 113 sets the amount of outside air supplied from the outdoor OR to the indoor IR by the supply air supply device 210 and the amount of indoor air exhausted from the indoor IR to the outdoor OR by the exhaust device 220, according to the operating status of each exhaust target EO.

[0039] For example, the operating states of the first exhaust target EO1 and the second exhaust target EO2 include operating, standby, and stopped, respectively. Furthermore, the exhaust volumes of the first exhaust target EO1 and the second exhaust target EO2 are assumed to be at their maximum, minimum, and intermediate levels during operating, stopped, and standby states, respectively. Also, the exhaust volumes of the first exhaust target EO1 and the second exhaust target EO2 are assumed to be different. In this case, the total exhaust volume from the first exhaust target EO1 and the second exhaust target EO2 increases or decreases in nine stages depending on the operating states of the first and second exhaust target EO2.

[0040] Therefore, the intake and exhaust volume setting unit 113 sets the amount of internal air exhaust by the exhaust device 220 so that it is approximately equal to the sum of the exhaust volumes from each exhaust target EO corresponding to the operating state of each exhaust target EO. ​​Furthermore, the intake and exhaust volume setting unit 113 sets the amount of outside air supplied by the supply device 210 according to the set amount of internal air exhaust.

[0041] Specifically, the intake and exhaust volume setting unit 113 sets the intake and exhaust volumes of outside air according to the set pressure of the indoor IR where the liquid discharge device 100 is installed. For example, if the set pressure of the indoor IR can be maintained by making the intake and exhaust volumes of outside air equal, the intake and exhaust volume setting unit 113 sets the intake volume of outside air to a value equal to the exhaust volume of inside air.

[0042] Furthermore, if the set pressure of the indoor IR where the liquid discharge device 100 is installed is a negative pressure lower than the outside air pressure, the intake and exhaust volume setting unit 113 may set the outside air intake volume to a value less than the internal air exhaust volume. Similarly, if the set pressure of the indoor IR is a positive pressure higher than the outside air pressure, the intake and exhaust volume setting unit 113 may set the outside air intake volume to a value greater than the internal air exhaust volume.

[0043] Furthermore, if the control unit 110 is connected to the pressure sensor PS, the intake and exhaust volume setting unit 113 may set the outside air intake volume and the inside air exhaust volume according to the set pressure of the room IR in which the liquid discharge device 100 is installed and the detection result of the pressure sensor PS that detects the pressure of the room IR. In other words, the intake and exhaust volume setting unit 113 increases or decreases the outside air intake volume by the air supply device 210 so that the detection result of the pressure sensor PS becomes equal to the set pressure.

[0044] The intake and exhaust volume setting unit 113 transmits the set outside air intake volume and internal air exhaust volume to the intake and exhaust control unit 230 of the intake and exhaust device 200. The intake and exhaust control unit 230 controls the intake device 210 and exhaust device 220 to realize the outside air intake volume and internal air exhaust volume received from the intake and exhaust volume setting unit 113.

[0045] Next, the liquid discharge method of this embodiment will be described with reference to Figure 6. Figure 6 is a flow diagram of the liquid discharge method of this embodiment performed in the liquid discharge device 100. When the control unit 110 of the liquid discharge device 100 starts the processing flow shown in Figure 6, it first performs step S1 in which the operating state determination unit 111 determines whether or not the image formation unit 130, which is the first exhaust target EO1, is in operation.

[0046] In step S1, if the operating state determination unit 111 determines that the image-making unit 130, which is the first exhaust target EO1, is in operation (YES), the control unit 110 performs the next step S2. In step S2, the exhaust volume adjustment unit 112 determines the exhaust volume of the first exhaust target EO1 to be the operating volume, which is greater than the exhaust volume when not in operation.

[0047] Furthermore, if the operating status determination unit 111 determines in step S1 that the first exhaust target EO1 is not in operation (NO), the control unit 110 performs the next step S3. In this step S3, the exhaust volume adjustment unit 112 determines the exhaust volume of the first exhaust target EO1 to be less than the exhaust volume during operation, which is the non-operational exhaust volume.

[0048] After the completion of process S2 or process S3, the operating state determination unit 111 executes process S4 to determine whether the drying unit 140, which is the second exhaust target EO2, is in operation. If the operating state determination unit 111 determines in process S4 that the drying unit 140, which is the second exhaust target EO2, is in operation (YES), the control unit 110 executes the next process S5. In process S5, the exhaust volume adjustment unit 112 determines the exhaust volume of the second exhaust target EO2 to be the operating volume, which is greater than the exhaust volume when not in operation.

[0049] Furthermore, if the operating status determination unit 111 determines in step S4 that the second exhaust target EO2 is not in operation (NO), the control unit 110 performs the next step S6. In this step S6, the exhaust volume adjustment unit 112 determines the exhaust volume of the second exhaust target EO2 to a non-operating exhaust volume that is less than the exhaust volume during operation. After the completion of step S5 or step S6, the control unit 110 performs step S7 to control the adjustment unit 160.

[0050] In step S7, the exhaust volume adjustment unit 112 controls the adjustment unit 160 provided in the branch pipe of the exhaust pipe 150 connected to the first exhaust target EO1 so that the amount of exhaust passing through the branch pipe becomes the amount of exhaust determined in step S2 or S3. Similarly, the exhaust volume adjustment unit 112 controls the adjustment unit 160 provided in the branch pipe of the exhaust pipe 150 connected to the second exhaust target EO2 so that the amount of exhaust passing through the branch pipe becomes the amount of exhaust determined in step S5 or S6. After that, the control unit 110 executes step S8 to set the internal air exhaust volume and the external air supply volume.

[0051] In step S8, the supply and exhaust volume setting unit 113 sets the amount of outside air supplied by the supply air device 210 and the amount of inside air exhausted by the exhaust air device 220 according to the operating status of the first exhaust target EO1 and the second exhaust target EO2. Specifically, the amount of inside air exhaust is determined to be approximately equal to the sum of the exhaust volume from the first exhaust target EO1 and the exhaust volume from the second exhaust target EO2 determined in steps S2, S3, S5, and S6, and the amount of outside air supplied is set according to that amount of inside air exhaust. In step S8, as described above, the supply and exhaust volume setting unit 113 may set the amount of outside air supplied and the amount of inside air exhaust according to the set pressure in the room where the liquid discharge device 100 is installed.

[0052] Furthermore, in step S8, the supply and exhaust volume setting unit 113 of the control unit 110 transmits the set outside air supply volume and internal air exhaust volume to the supply and exhaust control unit 230 of the supply and exhaust device 200. As a result, the exhaust device 220 is controlled by the supply and exhaust control unit 230, and the air at the internal air exhaust volume set by the control unit 110 is exhausted by the exhaust device 220 from the indoor IR where the liquid discharge device 100 is installed to the outdoor OR. In this way, air containing liquid mist and gases from vaporized liquids is discharged from the first exhaust target EO1 and the second exhaust target EO2 to the outdoor OR via the exhaust pipe 150 and exhaust duct 240.

[0053] Furthermore, the air supply device 210 is controlled by the air supply and exhaust control unit 230, and the amount of outside air supplied by the control unit 110 is supplied by the air supply device 210 to the room IR where the liquid discharge device 100 is installed. This suppresses pressure fluctuations in the room where the liquid discharge device 100 is installed. After the completion of process S8, the control unit 110 terminates the processing flow shown in Figure 6 and repeats the same processing flow at a predetermined cycle.

[0054] The following describes the operation of the liquid dispensing device 100, liquid dispensing system 1, liquid dispensing method, and program of this embodiment.

[0055] As described above, the liquid discharge device 100 of this embodiment is installed in an indoor IR equipped with an air supply device 210 and an exhaust device 220. The liquid discharge device 100 comprises an exhaust target EO, an exhaust pipe 150, an adjustment unit 160, and a control unit 110. The exhaust target EO includes an imaging unit 130 that discharges liquid onto a target to create an image. The exhaust pipe 150 connects the exhaust target EO and the exhaust device 220. The adjustment unit 160 is configured to adjust the amount of exhaust passing through the exhaust pipe 150. The control unit 110 controls the adjustment unit 160 according to the operating state of the exhaust target EO to adjust the amount of exhaust passing through the exhaust pipe 150. The control unit 110 also sets the amount of outside air supplied from the outdoor OR to the indoor IR by the air supply device 210 and the amount of inside air exhausted from the indoor IR to the outdoor OR by the exhaust device 220.

[0056] With this configuration, the liquid ejection device 100 of this embodiment can exhaust air containing liquid mist and vaporized liquid gas generated during printing in the exhaust target EO, including the image-making unit 130, to the outside OR via the exhaust pipe 150. Furthermore, the control unit 110 controls the adjustment unit 160 according to the operating status of the exhaust target EO to adjust the amount of exhaust passing through the exhaust pipe 150, and also sets the amount of internal air exhaust by the exhaust device 220, thereby reducing the amount of exhaust when the exhaust target EO is in standby or not in operation. This reduces the power consumption of the exhaust device 220. In addition, according to the operating status of the exhaust target EO, not only the amount of internal air exhaust by the exhaust device 220 but also the amount of outside air supplied by the air supply device 210 can be set, thereby suppressing pressure fluctuations in the room IR where the liquid ejection device 100 is installed.

[0057] Furthermore, in the liquid dispensing device 100 of this embodiment, the control unit 110 sets the amount of outside air supplied by the air supply device 210 and the amount of inside air exhausted by the exhaust device 220 according to the set pressure of the indoor IR.

[0058] With this configuration, the exhaust device 220 can exhaust gases from the target EO of the liquid discharge device 100 while maintaining the indoor IR pressure at a predetermined set pressure. Specifically, for example, the relationship between the amount of outside air supplied and the amount of inside air exhausted that can maintain the set pressure of the indoor IR can be determined in advance and stored in the control unit 110, and by setting the amount of outside air supplied that satisfies this relationship in accordance with the increase or decrease in the amount of inside air exhausted, the indoor IR pressure can be maintained at the set pressure.

[0059] Furthermore, in the liquid dispensing device 100 of this embodiment, the control unit 110 sets the amount of outside air supplied by the air supply device 210 and the amount of inside air exhausted by the exhaust device 220 according to the detection result of the pressure sensor PS which detects the atmospheric pressure of the indoor IR.

[0060] With this configuration, while exhausting the target EO of the liquid discharge device 100 using the exhaust device 220, the amount of outside air supplied by the air supply device 210 can be increased or decreased using the detection result of the pressure sensor PS when maintaining the indoor IR pressure at a predetermined set pressure. Therefore, according to the liquid discharge device 100 of this embodiment, it is possible to maintain the indoor IR pressure at the set pressure with higher precision.

[0061] Furthermore, the liquid discharge system 1 of this embodiment includes the aforementioned liquid discharge device 100 and a supply and exhaust device 200. The supply and exhaust device 200 includes an air supply device 210 and an exhaust device 220.

[0062] With this configuration, the liquid ejection system 1 of this embodiment can exhaust air containing liquid mist and vaporized liquid gas generated during printing in the exhaust target EO, including the image-making unit 130 of the liquid ejection device 100, to the outside OR via the exhaust pipe 150. Furthermore, the control unit 110 of the liquid ejection device 100 can control the adjustment unit 160 to adjust the amount of exhaust passing through the exhaust pipe 150 according to the operating status of the exhaust target EO. ​​In addition, the control unit 110 of the liquid ejection device 100 can reduce the amount of exhaust when the exhaust target EO is in standby or not in operation by setting the amount of internal air exhausted by the exhaust device 220. This can suppress the power consumption of the exhaust device 220. Moreover, according to the operating status of the exhaust target EO, not only the amount of internal air exhausted by the exhaust device 220 but also the amount of outside air supplied by the air supply device 210 can be set to suppress atmospheric pressure fluctuations in the room IR where the liquid ejection device 100 is installed.

[0063] Furthermore, the liquid discharge method of this embodiment is performed in a liquid discharge device 100 installed in an indoor IR equipped with an air supply device 210 and an exhaust device 220. As described above, the liquid discharge device 100 includes an exhaust target EO including an imaging unit 130 that discharges liquid onto a target to create an image, an exhaust pipe 150 connecting the exhaust target EO and the exhaust device 220, and an adjustment unit 160 that can adjust the amount of exhaust passing through the exhaust pipe 150. The liquid discharge method of this embodiment adjusts the amount of exhaust by controlling the adjustment unit 160 according to the operating state of the exhaust target EO, and sets the amount of outside air supplied from the outdoor OR to the indoor IR by the air supply device 210 and the amount of inside air exhausted from the indoor IR to the outdoor OR by the exhaust device 220.

[0064] With this configuration, the liquid ejection method of this embodiment allows the liquid ejection device 100, including the image-making unit 130, to exhaust air containing liquid mist and vaporized liquid gas generated during printing to the outside OR via the exhaust pipe 150. Furthermore, the amount of exhaust passing through the exhaust pipe 150 can be adjusted by controlling the adjustment unit 160 according to the operating status of the exhaust target EO. ​​In addition, the control unit 110 of the liquid ejection device 100 can set the amount of internal air exhausted by the exhaust device 220, thereby reducing the amount of exhaust when the exhaust target EO is in standby or not in operation. This reduces the power consumption of the exhaust device 220. Moreover, by setting not only the amount of internal air exhausted by the exhaust device 220 but also the amount of outside air supplied by the air supply device 210 according to the operating status of the exhaust target EO, pressure fluctuations in the room IR where the liquid ejection device 100 is installed can be suppressed.

[0065] Furthermore, the program of this embodiment is executed by a control unit 110, which is a computer, in a liquid discharge device 100 installed in an indoor IR equipped with an air supply device 210 and an exhaust device 220. As described above, the liquid discharge device 100 includes an exhaust target EO including an imaging unit 130 that discharges liquid onto a target to create an image, an exhaust pipe 150 that connects the exhaust target EO and the exhaust device 220, and an adjustment unit 160 that can adjust the amount of exhaust passing through the exhaust pipe 150. The program of this embodiment causes the control unit 110 to control the adjustment unit 160 according to the operating state of the exhaust target EO to adjust the amount of exhaust. The program of this embodiment also causes the control unit 110 to set the amount of outside air supplied from the outdoor OR to the indoor IR by the air supply device 210 and the amount of inside air exhausted from the indoor IR to the outdoor OR by the exhaust device 220.

[0066] With this configuration, the program of this embodiment allows the control unit 110 to exhaust air containing liquid mist and vaporized liquid gas generated during printing in the exhaust target EO, including the image-making unit 130 of the liquid ejection device 100, to the outside OR via the exhaust pipe 150. Furthermore, the control unit 110 can control the adjustment unit 160 to adjust the amount of exhaust passing through the exhaust pipe 150 according to the operating status of the exhaust target EO. ​​In addition, by setting the amount of internal air exhausted by the exhaust device 220 in the control unit 110, the amount of exhaust can be reduced when the exhaust target EO is in standby or not in operation. This reduces the power consumption of the exhaust device 220. Moreover, by setting not only the amount of internal air exhausted by the exhaust device 220 but also the amount of outside air supplied by the air supply device 210 in the control unit 110 according to the operating status of the exhaust target EO, pressure fluctuations in the room IR where the liquid ejection device 100 is installed can be suppressed.

[0067] As described above, this embodiment provides a liquid dispensing device 100, a liquid dispensing system 1, a liquid dispensing method, and a program that can suppress indoor IR pressure fluctuations. However, this embodiment is not limited to the configuration described above. Modifications of this embodiment will be described below with reference to Figures 7 and 8.

[0068] Figures 7 and 8 are schematic cross-sectional views showing modified versions of the liquid dispensing device 100 shown in Figure 2. These modified versions of the liquid dispensing devices 100A and 100B differ from the liquid dispensing device 100 shown in Figure 2 in the configuration of the drying section 140A, or the image-forming section 130A and the drying section 140A. Other configurations of the liquid dispensing devices 100A and 100B are the same as those of the aforementioned liquid dispensing device 100; therefore, the same reference numerals are used for the same parts, and their explanation is omitted. Note that the transport section 120 is not shown in Figures 7 and 8.

[0069] In the liquid dispensing device 100A shown in Figure 7 and the liquid dispensing device 100B shown in Figure 8, the drying section 140A, which is the exhaust target EO, is equipped with multiple dryers 144 for drying the liquid dispensed onto the continuous paper CF by the image-forming section 130. In the liquid dispensing device 100B shown in Figure 8, the image-forming section 130A, which is the exhaust target EO, is equipped with a liquid dispensing head 131, a roller nip coating mechanism 132, and a dryer 133 for use after liquid coating. Liquid dispensing devices 100A and 100B with such configurations can achieve the same effects as the liquid dispensing device 100 of the aforementioned embodiment 1.

[0070] Furthermore, for the standard drying section 140 and the add-on drying section 140A, the necessity of exhaust is determined by factors such as whether the temperature inside the drying section 140 or 140A is high during heating and therefore volatile substances need to be exhausted, or whether there are conditions for condensation due to the evaporation of moisture. In addition, for pre-coating machines such as the image-making section 130A, the necessity of exhaust is determined by whether or not the pre-coating liquid is being applied. Therefore, in the image-making section 130A, even during printing, if the printing conditions do not require pre-coating, exhaust is unnecessary, and the adjustment section 160 can reduce the amount of exhaust passing through the exhaust pipe 150, thereby reducing the amount of internal air exhausted by the exhaust device 220.

[0071] [Embodiment 2] Next, with reference to Figures 1 to 4 and Figures 9 to 11, Embodiment 2 of the liquid dispensing device according to the present disclosure will be described. Figure 9 is a schematic cross-sectional view showing Embodiment 2 of the liquid dispensing device according to the present disclosure. Figure 10 is a functional block diagram of the control unit 110 of the liquid dispensing device 100C according to this embodiment.

[0072] The liquid dispensing device 100C of this embodiment differs from the liquid dispensing device 100A, which is a modified example of Embodiment 1 shown in Figure 7, in the following configuration. The liquid dispensing device 100C shown in Figure 9 further includes a condensation water storage section 151 provided in the middle of the exhaust pipe 150, and an opening / closing section 170 that can open and close a drain port 151a provided at the bottom of the condensation water storage section 151.

[0073] Furthermore, the control unit 110 shown in Figure 10 has an opening / closing control unit 114 in addition to the operating state determination unit 111, the exhaust volume adjustment unit 112, and the intake / exhaust volume setting unit 113. The other configurations of the liquid discharge device 100C of this embodiment are the same as those of the liquid discharge device 100A according to the modified example 1 of Embodiment 1 described above, so the same reference numerals are used for the same parts and their description is omitted.

[0074] As shown in Figure 9, the condensation water storage section 151 is provided, for example, at the bottom of the exhaust pipe 150 where a branch pipe connected to the image-making section 130, which is the first exhaust target EO1, and a branch pipe connected to the drying section 140A, which is the second exhaust target EO2, merge. The condensation water storage section 151 is provided in the shape of a container with a bottom that is lower than the bottom wall of the exhaust pipe 150, for example, like a drain pan for receiving condensation water.

[0075] A drain port 151a is provided at the bottom of the condensation water storage section 151 for discharging condensation water from the condensation water storage section 151. The drain port 151a is connected to a drain tank 153, for example, via a drain pipe 152. The condensation water stored in the condensation water storage section 151 and discharged from the drain port 151a flows into the drain tank 153 via the drain pipe 152 and is stored there. The drain tank 153 is detachably mounted relative to the drain pipe 152.

[0076] The opening / closing section 170 is provided, for example, below the drain port 151a and is configured to open and close the drain port 151a. The drain port 151a is configured, for example, by a control valve that can be automatically opened and closed under the control of the control unit 110. The condensation water storage section 151 may also be configured, for example, by a shutter that can be automatically opened and closed under the control of the control unit 110.

[0077] The open / close control unit 114 of the control unit 110 shown in Figure 10 represents the function of the control unit 110, which is realized by the CPU 110a executing a program stored in the ROM 110b or NVRAM 110d, similar to the aforementioned operating state determination unit 111.

[0078] The opening / closing control unit 114 opens the opening / closing section 170 when the exhaust device 220 is stopped and closes the opening / closing section 170 when the exhaust device 220 is in operation. The opening / closing control unit 114 determines the operating state of the exhaust device 220 based on, for example, the operating state of the image-making section 130 as the first exhaust target EO1 and the drying section 140A as the second exhaust target EO2. Specifically, the opening / closing control unit 114 determines that the exhaust device 220 is stopped when the first exhaust target EO1 and the second exhaust target EO2 are stopped, and determines that the exhaust device 220 is in operation otherwise.

[0079] Figure 11 is a flow chart of the liquid discharge method by the control unit 110 in Figure 10. In the liquid discharge device 100C of this embodiment, when the control unit 110 starts the processing flow shown in Figure 11, it performs steps S1 to S8 in the same way as the control unit 110 of the liquid discharge device 100 according to Embodiment 1.

[0080] As a result, for example, when the first exhaust target EO1 and the second exhaust target EO2 are in operation, the exhaust EA from the first exhaust target EO1 and the second exhaust target EO2 passes through the exhaust pipe 150 and is discharged to the outside OR via the exhaust duct 240 by the exhaust device 220. At this time, the temperature of the exhaust EA discharged from the image-making unit 130 as the first exhaust target EO1 tends to be lower than the temperature of the exhaust EA discharged from the drying unit 140A as the second exhaust target EO2.

[0081] Therefore, when the exhaust EA discharged from the first exhaust target EO1 and the exhaust EA discharged from the second exhaust target EO2 merge at the point where the branch pipes of the exhaust pipe 150 merge, the exhaust EA with the higher temperature may be cooled, causing condensation. The condensed water generated in this way flows into the condensation water storage section 151 provided at the bottom of the point where the branch pipes of the exhaust pipe 150 merge, and is temporarily stored in the condensation water storage section 151.

[0082] Subsequently, the control unit 110 of the liquid discharge device 100C in this embodiment performs a step S9 to determine whether or not the exhaust device 220 is stopped, as shown in Figure 11. In this step S9, if the opening / closing control unit 114 determines that the exhaust device 220 is stopped (YES) based on the operating status of the first exhaust target EO1 and the second exhaust target EO2, it performs a step S10 to open the opening / closing unit 170. As a result, the condensation water stored in the condensation water storage unit 151 is discharged from the drain port 151a and flows into the drain tank 153 via the drain pipe 152 for storage.

[0083] Furthermore, in step S9, if the opening / closing control unit 114 determines that the exhaust device 220 is not stopped (NO) based on the operating status of each exhaust target EO, it performs step S11 to close the opening / closing unit 170. This maintains the pressure inside the exhaust pipe 150 and allows for smooth exhaust from the first exhaust target EO1 and the second exhaust target EO2.

[0084] After the completion of process S10 or process S11, the control unit 110 of the liquid dispensing device 100C executes process S12 to determine whether or not the power to the liquid dispensing device 100C has been turned off. In this process S12, if the control unit 110 determines that the power has not been turned off (NO), it repeats processes S1 to S12. Also, in this process S12, if the control unit 110 determines that the power has been turned off (YES), it terminates the processing flow shown in Figure 11.

[0085] As described above, the liquid discharge device 100C of this embodiment further includes a condensation water storage section 151 provided in the middle of the exhaust pipe 150, and an opening / closing section 170 that can open and close a drain port 151a provided at the bottom of the condensation water storage section 151.

[0086] With this configuration, the liquid discharge device 100C of this embodiment can achieve the same effects as the liquid discharge device 100 of Embodiment 1 described above, and furthermore, it can automatically discharge condensation water generated in the exhaust pipe 150 without obstructing the exhaust of the exhaust target EO.

[0087] Furthermore, in the liquid discharge device 100C of this embodiment, the opening / closing section 170 is configured to be automatically opened and closed by the control unit 110. The control unit 110 opens the opening / closing section 170 when the exhaust device 220 is stopped and closes the opening / closing section 170 when the exhaust device 220 is in operation.

[0088] With this configuration, according to the liquid discharge device 100C of this embodiment, when the exhaust device 220 is stopped, the opening / closing section 170 is opened, allowing the condensation water stored in the condensation water storage section 151 to be discharged from the drain port 151a. Furthermore, when the exhaust device 220 is in operation, closing the opening / closing section 170 maintains the pressure inside the exhaust pipe 150, enabling smooth exhaust from the first exhaust target EO1 and the second exhaust target EO2.

[0089] As described above, according to this embodiment, a liquid dispensing device 100C, a liquid dispensing system, a liquid dispensing method, and a program capable of suppressing indoor IR pressure fluctuations can be provided, similar to Embodiment 1.

[0090] [Embodiment 3] Next, with reference to Figures 1 to 4 and Figure 12, Embodiment 3 of the liquid dispensing system according to the present disclosure will be described. Figure 12 is a schematic cross-sectional view showing Embodiment 3 of the liquid dispensing system according to the present disclosure.

[0091] The liquid discharge system of this embodiment comprises a plurality of liquid discharge devices 100, an exhaust duct 240 connecting each liquid discharge device 100 to an exhaust device 220, an adjustment unit 160 provided in the exhaust duct 240, and a control unit 300 that controls the adjustment unit 160. The other components of the liquid discharge system according to this embodiment are the same as those of the liquid discharge system 1 of Embodiment 1 described above, so the same parts are denoted by the same reference numerals and their description is omitted.

[0092] The multiple liquid dispensing devices 100 shown in Figure 12 are installed in a room equipped with an air supply device 210 and an exhaust device 220, similar to the liquid dispensing device 100 of Embodiment 1 shown in Figure 1. In the liquid dispensing system of this embodiment, the exhaust duct 240 connects each liquid dispensing device 100 to the exhaust device 220. Furthermore, as shown in Figure 12, the adjustment unit 160 is provided in each branch duct of the exhaust duct 240 connected to each liquid dispensing device 100, and has a configuration that allows adjustment of the amount of exhaust passing through each branch duct. The control unit 300 has the same configuration as the control unit 110 in the liquid dispensing device 100 of Embodiment 1. The control unit 300 controls the adjustment unit 160 according to the operating state of each liquid dispensing device 100 to adjust the amount of exhaust. The control unit 300 is also connected to the air supply and exhaust control unit 230 of the air supply and exhaust device 200 in a communication manner. The control unit 300 sets the amount of outside air supplied from the outdoor OR to the indoor IR by the air supply device 210 and the amount of indoor air exhausted from the indoor IR to the outdoor OR by the exhaust device 220, according to the operating status of each liquid discharge device 100, and transmits this information to the air supply and exhaust control unit 230.

[0093] With this configuration, the liquid ejection system of this embodiment can exhaust air containing liquid mist and vaporized liquid gas generated during printing to the outside OR via the exhaust duct 240, using multiple liquid ejection devices 100 including the image-making unit 130. Furthermore, the liquid ejection system of this embodiment uses a control unit 300 to control the adjustment unit 160 according to the operating status of each liquid ejection device 100, adjusting the amount of exhaust passing through the exhaust duct 240 and setting the amount of internal air exhausted by the exhaust device 220. This reduces the amount of exhaust when each liquid ejection device 100 is on standby or not in operation, thereby suppressing the power consumption of the exhaust device 220. Moreover, by setting not only the amount of internal air exhausted by the exhaust device 220 but also the amount of outside air supplied by the air supply device 210 according to the operating status of each liquid ejection device 100, fluctuations in the air pressure in the room IR where the multiple liquid ejection devices 100 are installed can be suppressed.

[0094] The embodiments of the liquid dispensing device, liquid dispensing system, liquid dispensing method, and program relating to this disclosure have been described in detail above. However, the liquid dispensing device, liquid dispensing system, liquid dispensing method, and program relating to this disclosure are not limited to the embodiments described above. Various modifications or substitutions may be applied to the embodiments described above without departing from the scope of this disclosure. [Explanation of Symbols]

[0095] 1. Liquid Dispensing System 100 Liquid dispensing device 100A liquid discharge device 100B Liquid discharge device 100C liquid discharge device 110 Control Unit 130 Imaging section 130A Imaging section 150 Exhaust pipe 151 Condensation water storage section 151a Drain 160 Adjustment section 170 Opening / Closing Section 200 Intake and exhaust system 210 Air supply system 220 Exhaust system 240 Exhaust duct 300 Control Unit EO exhaust target IR indoor OR outdoor PS barometric pressure sensor [Prior art documents] [Patent Documents]

[0096] [Patent Document 1] Japanese Patent Application Publication No. 11-087226

Claims

1. A liquid dispensing device installed in a room equipped with an air supply system and an exhaust system, An exhaust device including an imaging unit that discharges liquid onto the target to create an image, An exhaust pipe connecting the exhaust target and the exhaust device, An adjustment unit capable of adjusting the amount of exhaust gas passing through the exhaust pipe, The system includes a control unit that controls the adjustment unit according to the operating state of the exhaust target to adjust the exhaust volume, and sets the amount of outside air supplied from outside to inside by the air supply device and the amount of inside air exhausted from inside to outside by the exhaust device. Liquid discharge device.

2. The control unit sets the amount of outside air supplied and the amount of inside air exhausted according to the set air pressure inside the room. The liquid dispensing device according to claim 1.

3. A condensation water storage section is provided in the middle of the exhaust pipe, The system further includes an opening / closing mechanism that can open and close a drain port provided at the bottom of the condensation water storage section. The liquid dispensing device according to claim 1.

4. The opening / closing section is configured to be automatically opened and closed under the control of the control unit. The control unit opens the opening / closing section when the exhaust system is stopped, and closes the opening / closing section when the exhaust system is in operation. The liquid dispensing device according to claim 3.

5. The control unit sets the amount of outside air supplied and the amount of inside air exhausted according to the detection result of the pressure sensor that detects the air pressure inside the room. The liquid dispensing device according to claim 2.

6. A liquid dispensing device according to any one of claims 1 to 4, The system comprises an air supply device and an exhaust device including the exhaust device, Liquid dispensing system.

7. Multiple liquid dispensing devices are installed in a room equipped with an air supply system and an exhaust system, An exhaust duct connecting each of the aforementioned liquid discharge devices and the aforementioned exhaust device, An adjustment unit capable of adjusting the amount of exhaust gas passing through the exhaust duct, The system includes a control unit that controls the adjustment unit according to the operating status of each of the liquid discharge devices to adjust the exhaust volume, and sets the amount of outside air supplied from outside to inside by the air supply device and the amount of inside air exhausted from inside to outside by the exhaust device. Liquid dispensing system.

8. A liquid dispensing method performed in a liquid dispensing device installed in a room equipped with an air supply device and an exhaust device, the device comprising: an exhaust target including an image-forming unit that dispenses liquid onto an object to form an image; an exhaust pipe connecting the exhaust target and the exhaust device; and an adjustment unit capable of adjusting the amount of exhaust passing through the exhaust pipe, The adjustment unit is controlled according to the operating state of the exhaust target to adjust the exhaust volume, and the amount of outside air supplied from outside to inside by the air supply device and the amount of inside air exhausted from inside to outside by the exhaust device are set. Liquid dispensing method.

9. A liquid dispensing device installed in a room equipped with an air supply device and an exhaust device, comprising an exhaust target including an image-forming unit that dispenses liquid onto an object to form an image, an exhaust pipe connecting the exhaust target and the exhaust device, and an adjustment unit capable of adjusting the amount of exhaust passing through the exhaust pipe, The computer controls the adjustment unit according to the operating status of the exhaust target to adjust the exhaust volume, and sets the amount of outside air supplied from outside to inside by the air supply device and the amount of inside air exhausted from inside to outside by the exhaust device. program.

Images