Air blower for sheets

Abstract

To provide a blower device for a seat that can reduce noise at the time of blowing air and restriction of arrangement of a seat.SOLUTION: A blower device for a seat includes: a compression pump installed to a seat; and a nozzle configured to evacuate a gas transferred from the compression pump toward a seated region of the seat from the inside of the seat.SELECTED DRAWING: Figure 1

Description

Technical Field

[0001] The present disclosure relates to a seat blower device.

Background Art

[0002] A blower device that blows air from inside the seat toward the seated person is known (see Patent Document 1). This blower device sucks air from outside the seat by a fan disposed inside the seat and blows the air.

Prior Art Documents

Patent Documents

[0003]

Patent Document 1

Summary of the Invention

Problems to be Solved by the Invention

[0004] When a fan is provided inside the seat, noise (i.e., wind noise) due to the fan occurs in the seat. Also, a space for arranging the fan inside the seat is required. Further, when the air inlet of the fan is arranged in consideration of the design of the seat, the internal structure such as ducts becomes complicated. Therefore, there are significant restrictions in the arrangement of the blower device.

[0005] One aspect of the present disclosure aims to provide a seat blower device capable of reducing noise during blowing and restrictions in arrangement in the seat.

Means for Solving the Problems

[0006] One aspect of the present disclosure is a seat blower device (1) including a compression pump (2) installed in a seat (100) and a nozzle (3) configured to discharge the gas sent from the compression pump (2) from inside the seat (100) toward the seating area of the seat (100).

[0007] With this configuration, since compressed gas is supplied by the compression pump (2), noise during ventilation is reduced. In addition, the space required for the sheet ventilation device (1) can be reduced, and the intake port, exhaust port, and gas supply path can be flexibly arranged. As a result, the constraints on the placement of the sheet ventilation device (1) on the sheet (100) are reduced.

[0008] In one aspect of this disclosure, the nozzle (3) may be positioned on the headrest (103) of the seat (100). With this configuration, it is possible to cool the neck of the seated person while suppressing the generation of noise near the seated person's ears without increasing the size of the headrest (103).

[0009] One aspect of this disclosure may further include a gas bag (4) configured to cause the sheet (100) to fluctuate by expanding due to the supply of gas from a compression pump (2). With such a configuration, both air supply from a nozzle (3) and massage by the gas bag (4) can be performed by a single sheet blower (1). Therefore, the added value of the sheet (100) can be increased while suppressing the complexity of the internal structure of the sheet (100).

[0010] One aspect of this disclosure may further include an airflow adjustment mechanism (6) configured to adjust the amount of gas discharged from the nozzle (3). With such a configuration, air can be supplied at a comfortable airflow rate for the seated person.

[0011] In one aspect of this disclosure, the airflow adjustment mechanism (6) may include a tank (61) configured to store the gas sent from the compression pump (2), and a pressure adjustment unit (62) configured to adjust the pressure of the gas sent from the tank (61) to the nozzle (3). With such a configuration, the compression pump (2) can be made smaller. In addition, since the gas undergoes adiabatic expansion when discharged from the tank (61), the temperature of the gas discharged from the nozzle (3) can be lowered.

[0012] In one aspect of this disclosure, the airflow adjustment mechanism (6) may have an opening adjustment unit (63) configured to receive the pressure of the gas discharged from the nozzle (3) and move closer to the discharge port (31) of the nozzle (3) to reduce the opening area of ​​the discharge port (31). With such a configuration, the airflow velocity at the nozzle (3) can be kept low at the start of airflow, while gradually increasing the airflow velocity.

[0013] In one aspect of this disclosure, the airflow adjustment mechanism (6) may have an outlet adjustment unit (64) configured to receive the pressure of the gas discharged from the nozzle (3) and increase the number of outlets from which the gas supplied from the compression pump (2) is discharged at the nozzle (3). With such a configuration, the airflow at the nozzle (3) can be increased in accordance with the magnitude of the air pressure.

[0014] In one aspect of this disclosure, the airflow adjustment mechanism (6) may have a plurality of through holes (65A-65D) with different opening areas, and a lid (65) that can be displaced so that any of the plurality of through holes (65A-65D) overlaps with the discharge port (31) of the nozzle (3). With such a configuration, the airflow at the nozzle (3) can be adjusted with a relatively simple configuration.

[0015] One aspect of this disclosure may further include a liquid droplet supply mechanism (7) configured to supply atomized liquid droplets to the gas discharged from the nozzle (3). With such a configuration, the cooling effect of the airflow can be enhanced by the liquid droplets.

[0016] In one aspect of this disclosure, the liquid droplet supply mechanism (7) may be configured to supply liquid droplets intermittently. Such a configuration can suppress acclimatization of the seated person to the liquid droplets. As a result, the cooling effect experienced by the seated person can be enhanced.

[0017] In one aspect of this disclosure, the seat (100) may be installed in a vehicle. With this configuration, a ventilation function can be provided to a seat (100) for a vehicle, where space constraints are relatively large, while reducing placement constraints.

[0018] Note that the reference signs in each of the above parentheses are an example showing the correspondence with the specific configuration etc. described in the embodiments described later, and the present disclosure is not limited to the specific configuration etc. indicated by the reference signs in the above parentheses.

Brief Description of the Drawings

[0019] [Figure 1] FIG. 1 is a schematic exploded view of a vehicle seat according to an embodiment. [Figure 2] FIG. 2 is a schematic configuration diagram of the blower device of FIG. 1. [Figure 3] FIG. 3 is a schematic diagram of a tank and a pressure adjustment unit in the air volume adjustment mechanism of FIG. 2. [Figure 4] FIGS. 4A and 4B are schematic diagrams of an opening adjustment unit in a state where the gas pressure in the air volume adjustment mechanism of FIG. 2 is low, and FIGS. 4C and 4D are schematic diagrams of the opening adjustment unit in a state where the gas pressure is high. [Figure 5] FIG. 5A is a schematic diagram of an outlet number adjustment unit in a state where the gas pressure in the air volume adjustment mechanism of FIG. 2 is low, and FIG. 5B is a schematic diagram of the outlet number adjustment unit in a state where the gas pressure is high. [Figure 6] FIGS. 6A and 6B are schematic diagrams of a lid portion in the air volume adjustment mechanism of FIG. 2. [Figure 7] FIGS. 7A and FIGS. 7B are schematic diagrams of the liquid particle supply mechanism of FIG. 2.

Mode for Carrying Out the Invention

[0020] Hereinafter, embodiments to which the present disclosure is applied will be described with reference to the drawings. [1. First Embodiment] [1-1. Configuration] The vehicle seat hundred shown in FIG. 1 includes a seat cushion hundred and one, a seat back hundred and two, a headrest hundred and three, a cushion frame hundred and four, a back frame hundred and five, a support hundred and six, and a blower device one.

[0021] The seat cushion 101 supports the seated person's buttocks. The seat back 102 supports the seated person's back. The headrest 103 supports the seated person's head. The cushion frame 104 supports the seat cushion 101. The back frame 105 supports the seat back 102. The support 106 further supports the back frame 105 from behind. The vehicle seat 100 of this embodiment is used as a seat in a passenger car.

[0022] <Air blower> The blower 1 comprises a compression pump 2, a nozzle 3, a gas bag 4, a switching mechanism 5, and a tube 10. Furthermore, as shown in Figure 2, the blower 1 also comprises an airflow adjustment mechanism 6, a liquid droplet supply mechanism 7, a control unit 8, and an input unit 9.

[0023] <Compression pump> The compression pump 2 shown in Figure 1 is installed in the vehicle seat 100. Specifically, the compression pump 2 is located inside the seat cushion 101 or seat back 102.

[0024] The compression pump 2 is configured to compress the air inside the vehicle and send the compressed air to the nozzle 3 and gas bag 4 via the tube 10. The compression pump 2 is a known pump that compresses gas by driving a screw, piston, etc., with a motor. The motor of the compression pump 2 has a variable rotation speed.

[0025] Tube 10 constitutes a gas supply path and connects the compression pump 2, nozzle 3, gas bag 4, and switching mechanism 5 to each other. Tube 10 is flexible. Tube 10 is located inside the seat cushion 101, seat back 102, and headrest 103. Tube 10 supplies gas to multiple devices through branching.

[0026] <Nozzle> The nozzle 3 is configured to discharge gas sent from the compression pump 2 from inside the vehicle seat 100 toward the seating area of ​​the vehicle seat 100.

[0027] Specifically, the nozzle 3 is located at the bottom of the headrest 103 of the vehicle seat 100 (i.e., in the area close to the seat back 102). The nozzle 3 blows air towards the neck of the person seated in the vehicle seat 100 by discharging gas forward from the seat. The nozzle 3 may have only one discharge port or may have multiple discharge ports.

[0028] <Gas bag> The gas bag 4 is configured to expand by the supply of gas sent from the compression pump 2 via the tube 10, thereby causing a portion of the vehicle seat 100 to move.

[0029] Specifically, the gas bag 4 has a cushion massage section 41 and a back massage section 42. The cushion massage section 41 and the back massage section 42 are bladders that massage the seated person by repeatedly expanding and contracting through the supply and release of air.

[0030] The cushion massage unit 41 is positioned between the cushion frame 104 and the seat cushion 101 of the vehicle seat 100 to massage the seated person's buttocks, etc. The back massage unit 42 is positioned between the back frame 105 and the seat back 102 of the vehicle seat 100 to massage the seated person's back, etc.

[0031] <Switching mechanism> The switching mechanism 5 is configured to switch the destination of the gas supplied from the compression pump 2. The switching mechanism 5 is held by the support 106.

[0032] Specifically, the switching mechanism 5 has multiple electromagnetic valves to which the tube 10 is connected. The switching mechanism 5 switches the supply of gas to the nozzle 3, the gas bag 4, and other gas-using equipment by opening and closing the multiple electromagnetic valves. The blower 1 can supply gas to only one of the nozzle 3 and the gas bag 4, or it can supply gas to both the nozzle 3 and the gas bag 4 simultaneously.

[0033] <Air volume adjustment mechanism> The airflow adjustment mechanism 6 shown in Figure 2 is configured to adjust the amount of gas discharged from the nozzle 3. The airflow adjustment mechanism 6 may adjust the airflow by an electrical command from the control unit 8, or it may adjust the airflow by using physical force.

[0034] As shown in Figure 3, the airflow adjustment mechanism 6 may include a tank 61 and a pressure adjustment unit 62. The tank 61 is configured to store the gas supplied from the compression pump 2 via the tube 10. The gas stored in the tank 61 is supplied toward the nozzle 3 while expanding. As a result, the gas, whose temperature has decreased due to adiabatic expansion, is discharged from the nozzle 3.

[0035] The pressure adjustment unit 62 is configured to adjust the pressure of the gas sent from the tank 61 to the nozzle 3 via the tube 10. Specifically, the pressure adjustment unit 62 has a plurality of switches 62A and a plurality of pressure gauges 62B. The plurality of switches 62A and the plurality of pressure gauges 62B are provided for each gas supply system.

[0036] Switch 62A switches the supply system on and off. When switch 62A is turned on, gas is supplied to the supply destination (e.g., nozzle 3) connected to this supply system. Switch 62A is switched on and off by the control unit 8. Pressure gauge 62B measures the pressure of the gas. The pressure measured by pressure gauge 62B is transmitted to the control unit 8.

[0037] The airflow adjustment mechanism 6 may have, together with or instead of, the tank 61 and the pressure adjustment unit 62, an opening adjustment unit 63 as shown in Figure 4A. The opening adjustment unit 63 is configured to receive the pressure of the gas G discharged from the nozzle 3 and move closer to the discharge port 31 of the nozzle 3, thereby reducing the opening area of ​​the discharge port 31.

[0038] Specifically, the opening adjustment section 63 has a closing section 63A, a pressure receiving section 63B, and a biasing section 63C. The closing section 63A is a cylindrical member located inside the nozzle 3. The outer diameter of the closing section 63A is smaller than the inner diameter of the discharge port 31.

[0039] The pressure-receiving section 63B is a plate-shaped part fixed to the occluding section 63A and receives the pressure of the gas G. The area of ​​the pressure-receiving section 63B as viewed from the direction of gas G flow (i.e., the pressure-receiving area) is larger than the area of ​​the occluding section 63A as viewed from the direction of gas G flow.

[0040] The biasing part 63C is an elastic body (specifically a spring) that biases the closing part 63A away from the outlet 31. As shown in Figure 4C, the biasing part 63C expands when the closing part 63A and the pressure-receiving part 63B move toward the outlet 31 due to the pressure of the gas G. When the pressure of the gas G decreases or disappears, as shown in Figure 4A, the biasing part 63C contracts, causing the closing part 63A and the pressure-receiving part 63B to move away from the outlet 31.

[0041] When the pressure of gas G is low, the occluding portion 63A moves away from the outlet 31, so the opening area of ​​the outlet 31 is maximized, as shown in Figure 4B. On the other hand, when the pressure of gas G is high, a part of the occluding portion 63A enters the outlet 31, so the opening area of ​​the outlet 31 becomes smaller, as shown in Figure 4D. Figures 4B and 4D are views of the outlet 31 from the front (i.e., parallel to the direction of gas G discharge).

[0042] In this way, the opening adjustment unit 63 mechanically changes the opening area of ​​the outlet 31 according to the pressure, flow rate, velocity, etc., of the gas G supplied to the nozzle 3. The opening area of ​​the outlet 31 decreases as the pressure, flow rate, velocity, etc., of the gas G increase.

[0043] The airflow adjustment mechanism 6 may have, together with the tank 61, pressure adjustment unit 62, and opening adjustment unit 63, or in place of these, an outlet number adjustment unit 64 as shown in Figure 5A. The outlet number adjustment unit 64 is configured to receive the pressure of the gas discharged from the nozzle 3 and increase the number of outlets from which the gas supplied from the compression pump 2 is discharged at the nozzle 3.

[0044] Specifically, the outlet adjustment unit 64 has a plug 64A and a biasing unit 64B. In addition, the nozzle 3 is provided with two outlets (i.e., a first outlet 31A and a second outlet 31B).

[0045] The plug 64A is movably positioned within the supply passage 10A that supplies gas G to the first outlet 31A and the second outlet 31B. The first outlet 31A is connected to the supply passage 10A upstream of the second outlet 31B. The biasing part 64B is an elastic body (specifically a spring) that biases the plug 64A upstream.

[0046] The plug 64A has a shape that completely blocks the supply passage 10A. As shown in Figure 5A, when the pressure of the gas G is low (i.e., when the pressure is less than the biasing force on the plug 64A by the biasing part 64B), the plug 64A is located between the branching point to the first outlet 31A and the branching point to the second outlet 31B in the supply passage 10A. Therefore, the gas G is not supplied to the second outlet 31B, and is supplied only to the first outlet 31A.

[0047] As shown in Figure 5B, when the pressure of the gas G is high, the plug 64A is pushed downstream of the branching point to the second outlet 31B. As a result, gas G is supplied to both the first outlet 31A and the second outlet 31B. At this time, the biasing part 64B contracts.

[0048] From the state shown in Figure 5B, when the pressure of gas G decreases or disappears, the biasing part 64B extends, causing the plug 64A to move upstream. As a result, the supply of gas G to the second outlet 31B is stopped.

[0049] The airflow adjustment mechanism 6 may have a lid portion 65 as shown in Figure 6A, together with the tank 61, pressure adjustment section 62, opening adjustment section 63, and number of outlets adjustment section 64, or in place of these. The lid portion 65 has a first through-hole 65A, a second through-hole 65B, a third through-hole 65C, and a fourth through-hole 65D, each with a different opening area. The opening areas of the first through-hole 65A, second through-hole 65B, third through-hole 65C, and fourth through-hole 65D increase in this order.

[0050] The lid portion 65 is displaceable so that any of the multiple through holes 65A-65D overlap with the discharge port 31 of the nozzle 3. Specifically, the lid portion 65 is rotatable around a rotation axis P parallel to the axial direction of the through holes 65A-65D (i.e., the direction of gas discharge from the discharge port 31). The portion of the lid portion 65 around the through holes 65A-65D overlaps with the discharge port 31, thereby blocking the discharge port 31.

[0051] In Figure 6A, the first through-hole 65A is aligned with the discharge port 31. From this state, as the lid 65 rotates counterclockwise, the second through-hole 65B becomes aligned with the discharge port 31, as shown in Figure 6B.

[0052] When the second through-hole 65B overlaps with the outlet 31, the area of ​​the outlet 31 blocked by the cover 65 is larger than the area of ​​the outlet 31 blocked by the cover 65 when the first through-hole 65A overlaps with the outlet 31. Therefore, when the through-hole that overlaps with (i.e. communicates with) the outlet 31 switches from the first through-hole 65A to the second through-hole 65B, the amount of air discharged from the outlet 31 is reduced.

[0053] In this way, the lid 65 adjusts the airflow from the nozzle 3 by switching the through-hole that overlaps with the discharge port 31 through rotation. The lid 65 may be displaced by manual operation by a seated person, or by an actuator operated in response to a command from the control unit 8. Furthermore, the number of through-holes in the lid 65 is not limited to four.

[0054] <Liquid droplet supply mechanism> As shown in Figure 7A, the liquid droplet supply mechanism 7 is configured to supply atomized liquid droplets to the gas G discharged from the nozzle 3.

[0055] The liquid atom supply mechanism 7 includes a liquid holding section 71 and a vibrator 72. The liquid holding section 71 is a container that holds a liquid R, such as water or aluminum oil, inside. As the water held by the liquid holding section 71, for example, wastewater generated during the chemical reaction of hydrogen in a hydrogen vehicle can be used.

[0056] The transducer 72 is configured to atomize the liquid R in the liquid holding section 71 using ultrasonic waves and spray it into the nozzle 3 or tube 10. The transducer 72 is also configured to operate intermittently. As a result, the liquid particle supply mechanism 7 intermittently supplies liquid particles to the gas G.

[0057] As shown in Figure 7B, the liquid droplet supply mechanism 7 may supply liquid droplets to the gas G outside the nozzle 3. In this case, the liquid droplet supply mechanism 7 sprays the liquid R near the outlet 31 of the nozzle 3.

[0058] Alternatively, the liquid droplet supply mechanism 7 may dispense liquid R into the nozzle 3 or tube 10 by means of a throat instead of a vibrator 72. The dispensed liquid R is atomized by the pressure of the gas G. In this case, the liquid droplets can be supplied to the gas G intermittently by adjusting the dispensing interval.

[0059] <Department Head> The control unit 8 shown in Figure 2 is a device that controls the compression pump 2, the switching mechanism 5, the airflow adjustment mechanism 6, and the liquid droplet supply mechanism 7.

[0060] The control unit 8 is composed of, for example, a computer comprising a processor, a storage medium such as RAM or ROM, and an input / output unit. The control unit 8 may be built into the vehicle seat 100, or it may be incorporated into an electronic control unit (ECU) mounted on the vehicle.

[0061] In addition to controlling the drive and stop of the compression pump 2, the control unit 8 may also adjust the airflow of the nozzle 3 by adjusting the motor speed of the compression pump 2. Furthermore, in addition to controlling the switching mechanism 5 to switch between supplying gas to the nozzle 3 and the gas bag 4, the control unit 8 may also adjust the airflow of the nozzle 3 by opening and closing the electromagnetic valve of the switching mechanism 5.

[0062] Furthermore, the control unit 8 may control the pressure adjustment unit 62 and the lid unit 65, respectively, in relation to the airflow adjustment mechanism 6. In addition, the control unit 8 may control the driving (i.e., the supply of liquid droplets) and stopping of the liquid droplet supply mechanism 7.

[0063] <Input section> The input unit 9 consists of physical or electronic switches, levers, etc., attached to the vehicle or vehicle seat 100.

[0064] The operations entered into the input unit 9 are transmitted to the control unit 8. The occupant can select the on / off status, airflow volume, and presence or absence of liquid droplet supply from the nozzle 3, as well as the on / off status of the massage by the gas bag 4, by operating the input unit 9. The occupant can also select the target area, intensity, and duration of the massage via the input unit 9.

[0065] [1-2. Effects] According to the embodiments described in detail above, the following effects can be obtained. (1a) Since compressed gas is supplied by the compression pump 2, noise during ventilation is reduced. In addition, the ventilation device 1 can be made more space-saving, and the intake port, exhaust port and gas supply path can be flexibly arranged. As a result, the constraints on the placement of the ventilation device 1 in the vehicle seat 100 are reduced.

[0066] (1b) By positioning the nozzle 3 on the headrest 103, it is possible to cool the neck of the seated person while suppressing the generation of noise near the seated person's ears without increasing the size of the headrest 103.

[0067] (1c) A single blower 1 can provide both airflow from the nozzle 3 and massage using the gas bag 4. This allows for increased added value of the vehicle seat 100 while suppressing complexity in the internal structure of the vehicle seat 100.

[0068] (1d) By providing the airflow adjustment mechanism 6, it is possible to blow air at a comfortable volume for seated persons.

[0069] (1e) The tank 61 and pressure adjustment unit 62 allow the compression pump 2 to be made smaller. Also, because the gas undergoes adiabatic expansion when discharged from the tank 61, the temperature of the gas discharged from the nozzle 3 can be lowered.

[0070] (1f) The opening adjustment section 63 allows the airflow velocity at the nozzle 3 to be gradually increased while keeping it low at the start of airflow. (1g) The number of discharge ports adjustment unit 64 allows the airflow volume at the nozzle 3 to be increased according to the magnitude of the air pressure.

[0071] (1h) The lid portion 65 allows for adjustment of the airflow volume at the nozzle 3 with a relatively simple configuration. (1i) By providing a liquid droplet supply mechanism 7, the cooling effect by airflow can be enhanced by the liquid droplets.

[0072] (1j) The liquid droplet supply mechanism 7 intermittently supplies liquid droplets, thereby suppressing the occupant's acclimatization to the droplets. As a result, the cooling effect experienced by the occupant can be enhanced. (1k) For vehicle seats 100, which have relatively large space constraints, it is possible to add a ventilation function while reducing placement constraints.

[0073] [2. Other Embodiments] While embodiments of this disclosure have been described above, it goes without saying that this disclosure is not limited to the embodiments described above and can take various forms.

[0074] (2a) In the blower of the above embodiment, the nozzle that discharges gas into the seating area of ​​the vehicle seat does not necessarily have to be located on the headrest. The nozzle may be located on the seat cushion or seat back.

[0075] (2b) The blower in the above embodiment does not necessarily have to include a gas bag. In other words, the compression pump may supply air only to the nozzle. (2c) In the blower of the above embodiment, the liquid droplet supply mechanism does not necessarily have to supply liquid droplets intermittently.

[0076] (2d) The vehicle seat of the above embodiment can also be applied to seats used in automobiles other than passenger cars, and seats used in vehicles other than automobiles, such as railway cars, ships, and aircraft. Furthermore, the ventilation device of the above embodiment can also be used for seats installed in facilities other than vehicles (for example, movie theaters, theaters, etc.).

[0077] (2e) The functions of one component in the above embodiment may be distributed among multiple components, or the functions of multiple components may be integrated into one component. Also, some parts of the configuration of the above embodiment may be omitted. Also, at least some parts of the configuration of the above embodiment may be added to, substituted for, or otherwise replaced with the configuration of other above embodiments. Any aspect of the technical concept specified by the wording of the claims is an embodiment of the present disclosure. [Explanation of Symbols]

[0078] 1... Blower, 2... Compression pump, 3... Nozzle, 4... Gas bag, 5... Switching mechanism 6...Air volume adjustment mechanism, 7...Liquid droplet supply mechanism, 8...Control unit, 9...Input unit, 10...Tube, 10A... Supply channel, 31, 31A, 31B... Discharge port, 41... Cushion massage section 42...Back massage unit, 61...Tank, 62...Pressure adjustment unit, 62A...Switch, 62B...Pressure gauge, 63...Opening adjustment section, 63A...Closing section, 63B...Pressure receiving section 63C...biasing part, 64...discharge port number adjustment part, 64A...plug, 64B...biasing part, 65...Lid part, 65A-65D...Through hole, 71...Liquid holding part, 72...Vibrator, 100...Vehicle seat, 101...Seat cushion, 102...Seat back, 103...Headrest, 104...Cushion frame, 105...Back frame, 106...Support.

Claims

1. A compression pump installed on the seat, A nozzle configured to discharge gas sent from the compression pump from inside the seat toward the seating area of ​​the seat, A gas bag configured to cause the sheet to move by expanding due to the supply of gas from the compression pump, An airflow adjustment mechanism configured to adjust the amount of gas discharged from the nozzle, Equipped with, The nozzle is positioned on the headrest of the seat. The compression pump is located on the seat back of the seat. The gas bag is placed on at least one of the seat back and seat cushion of the seat. The airflow adjustment mechanism has an opening adjustment section configured to receive the pressure of the gas discharged from the nozzle and reduce the opening area of ​​the discharge port by moving closer to the nozzle's discharge port. The aforementioned opening adjustment section is A cylindrical closure portion is disposed inside the nozzle, A plate-shaped pressure receiving part fixed to the aforementioned closure part, It has, A sheet blower wherein the outer diameter of the occluded portion is smaller than the inner diameter of the outlet.

2. A sheet blower according to claim 1, The aforementioned airflow adjustment mechanism is A tank configured to store the gas supplied from the aforementioned compression pump, A pressure adjustment unit configured to adjust the pressure of the gas sent from the tank to the nozzle, A sheet ventilation device having the following features.

3. A sheet blower according to claim 1 or claim 2, The airflow adjustment mechanism has a discharge port adjustment unit configured to receive the pressure of the gas discharged from the nozzle and increase the number of discharge ports from which the gas supplied from the compression pump is discharged in the nozzle, in order to provide a sheet ventilation device.

4. A sheet blower according to claim 1 or claim 2, The airflow adjustment mechanism has a plurality of through holes with different opening areas, and a cover portion that can be displaced so that any of the plurality of through holes overlaps with the discharge port of the nozzle, in a sheet blower.

5. A sheet blower according to claim 1 or claim 2, A sheet blower further comprising a liquid particle supply mechanism configured to supply atomized liquid particles to the gas discharged from the nozzle.

6. A sheet blower according to claim 5, The aforementioned liquid droplet supply mechanism is a sheet blower configured to supply the liquid droplets intermittently.

7. A sheet blower according to claim 1 or claim 2, The aforementioned seat is a seat ventilation device installed in a vehicle.

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