Fluid transport device

Abstract

To provide a fluid transport device capable of suppressing pressure loss. [Solution] The nozzle section 2 of the fluid conveying device 100 includes a first nozzle 32, a second nozzle 42, a third nozzle 52, and a plurality of fourth nozzles 45. The first nozzle 32 is formed by the first partition plate 3 and ejects a first jet. The second nozzle 42 is formed in an annular shape on the outer circumference of the first partition plate 3 and ejects a second jet. The third nozzle 52 is formed in an annular shape so as to surround at least a part of the outer circumference of the second partition plate 4 and ejects a third jet. The support members 46 support the third partition plate 5 on the outer circumference of the second partition plate 4. A plurality of support members 46 are provided at predetermined intervals in the circumferential direction. The plurality of fourth nozzles 45 are provided on the second partition plate 4 and eject a portion of the second jet J2 as a fourth jet J4. The support member 46, the fourth nozzle 45, and the second nozzle 42 are arranged in this order, along the transport direction of the third jet flow, starting from the third nozzle 52 side.

Description

[Technical Field]

[0001] The present disclosure relates to a fluid conveying device. [Background Art]

[0002] A fluid conveying device attached to the tip of an air conditioning duct for causing conditioned air to reach a target location in a spot-like manner is known. For example, Patent Document 1 describes a fluid conveying device having a nozzle portion that ejects fluid. This device is configured to suppress the induction effect and efficiently convey fluid. [Prior Art Documents] [Patent Documents]

[0003] [Patent Document 1] Japanese Unexamined Patent Application Publication No. 2023-110149 [Summary of the Invention] [Problem to be Solved by the Invention]

[0004] However, in view of the demand for further reduction in global energy consumption, the fluid conveying device described in Patent Document 1 still has room for improvement in terms of pressure loss in the air conditioning duct when attached to the tip of the outlet of the air conditioning duct.

[0005] The present disclosure has been made to solve the above problem, and an object of the present disclosure is to provide a fluid conveying device capable of suppressing pressure loss. [Means for Solving the Problem]

[0006] To solve the above problems, a fluid conveying device according to one aspect of the present invention is a fluid conveying device having a nozzle section for ejecting a fluid which is conditioned air, wherein the nozzle section is formed by a first partition plate in the shape of a cylinder or a frustoconical shape and includes a first nozzle for ejecting fluid as a first jet, a second nozzle for ejecting fluid as a second jet, which is formed in an annular shape by a second partition plate in the shape of a cylinder or a frustoconical shape so as to surround the outer circumference of the first partition plate, and includes a third nozzle for ejecting fluid as a third jet, which is formed in an annular shape by a third partition plate in the shape of a cylinder or a frustoconical shape so as to surround at least a part of the outer circumference of the second partition plate, and includes a plurality of support members that extend along the conveying direction of the second jet and support the third partition plate on the outer circumference of the second partition plate, and a plurality of fourth nozzles that are slit-shaped openings provided on the second partition plate and extending along the conveying direction of the second jet, for ejecting a part of the second jet as a fourth jet. Multiple fourth nozzles are arranged at predetermined intervals along the circumferential direction of the second partition plate, and the second nozzle, fourth nozzle, and support member are arranged in the order of support member, fourth nozzle, and second nozzle, along the transport direction of the third jet flow from the third nozzle side.

[0007] Furthermore, any combination of the above components, as well as any conversion of the expressions of this disclosure between methods, apparatus, systems, recording media, computer programs, etc., are also valid forms of this disclosure. [Effects of the Invention]

[0008] According to this disclosure, a fluid transport device capable of suppressing pressure loss can be provided. [Brief explanation of the drawing]

[0009] [Figure 1] This figure shows an air conditioning duct equipped with a fluid transport device according to the embodiment of this invention. [Figure 2] This figure shows an example of a fluid transport device according to an embodiment. [Figure 3] This figure schematically shows the second and fourth jets of the fluid conveying device shown in Figure 2. [Figure 4] This figure schematically shows the third and fourth jets of the fluid conveying device shown in Figure 2. [Figure 5] This figure shows a fluid transport device according to a modified example. [Figure 6] This figure shows the fourth nozzle and ribs of the fluid conveying device shown in Figure 5.

[0010] Hereinafter, embodiments for implementing this disclosure will be described with reference to the attached drawings. Each embodiment described below represents a preferred specific example of this disclosure. Therefore, the numerical values, shapes, materials, components, arrangement and connection configurations of components, as well as steps (processes) and the order of steps shown in the following embodiments are examples and are not intended to limit this disclosure. Accordingly, components in the following embodiments that are not described in an independent claim representing the highest-level concept of this disclosure will be described as arbitrary components. In addition, substantially identical components are denoted by the same reference numerals in each figure, and redundant explanations are omitted or simplified.

[0011] Furthermore, while terms including ordinal numbers such as "1st" and "2nd" are used to describe various components, these terms are used solely to distinguish one component from others, and do not limit the components themselves. When distinction is not necessary, ordinal numbers such as "1st" and "2nd" may be omitted.

[0012] [Embodiment] The configuration of the fluid conveying device 100 according to the embodiment of this disclosure will be described with reference to Figures 1 to 4. Figure 1 is a diagram showing an air conditioning duct 90 to which the fluid conveying device 100 according to the embodiment is attached. Figure 2 is a diagram showing an example of the fluid conveying device 100. Figure 2(A) shows the fluid conveying device 100 viewed from the side at an oblique angle, and Figure 2(B) shows the fluid conveying device 100 viewed from the front.

[0013] As shown in Figure 1, the fluid conveying device 100 is attached to the end of the air conditioning duct 90 and has a nozzle section 2 that ejects fluid J, which is conditioned air. The nozzle section 2 directs the jet of conditioned air precisely to the target location. For convenience, the direction of jet transport is referred to as the front-rear direction. The central axis extending in the front-rear direction from the center of the jet is indicated by the symbol X. The tip side of the nozzle section 2 is referred to as "front" relative to the base side, and the opposite side is referred to as "rear." This directional notation does not restrict the operating orientation of the fluid conveying device 100, and the fluid conveying device 100 can be used in any orientation. The nozzle section 2 is molded from metal or resin.

[0014] The nozzle section 2 comprises an inlet section 22, a first outlet 32, a second outlet 42, a third outlet 52, and a plurality of fourth outlets 45. The inlet section 22 is a hollow cylindrical portion located at the base end of the nozzle section 2, which fits into the tip of the air conditioning duct 90 and introduces conditioned air from the air conditioning duct 90 into the nozzle section 2. The conditioned air introduced into the nozzle section 2 is blown out from the first outlet 32, the second outlet 42, the third outlet 52, and the fourth outlets 45.

[0015] The first nozzle 32 is formed by a first partition plate 3 that has a shape surrounding the air conditioning airflow path, and is an opening from which the fluid is ejected as a first jet J1. The first partition plate 3 has a hollow cylindrical or frustoconical shape that surrounds the central axis X. In the example in Figure 2, the first partition plate 3 has a shape that narrows in diameter towards the front. The first nozzle 32 is a circular opening formed on the tip side of the first partition plate 3, and ejects the first jet J1. The first jet J1 is a jet with a substantially circular cross-section perpendicular to the central axis X.

[0016] The second nozzle 42 is formed in an annular shape surrounding the outer circumference of the first partition plate 3 by the second partition plate 4, which has a shape that encircles the first partition plate 3, and is an opening that ejects fluid as a second jet J2. The second partition plate 4 has a hollow cylindrical or frustoconical shape that surrounds the central axis X. In the example in Figure 2, the second partition plate 4 has a shape that narrows in diameter towards the front. The second nozzle 42 is a hollow circular opening formed on the outer circumference of the first partition plate 3 at the tip side of the second partition plate 4, and ejects the second jet J2. The second jet J2 is a donut-shaped jet with a cross-section perpendicular to the central axis X.

[0017] In the example shown in Figure 2, the leading edge position of the second partition plate 4 is the same as the leading edge position of the first partition plate 3 in the front-to-back direction, but it may be in front of or behind the leading edge position of the first partition plate 3.

[0018] The third nozzle 52 is formed in an annular shape so as to surround at least a portion of the outer circumference of the second partition plate 4, and is an opening that ejects fluid as a third jet J3. The third partition plate 5 has a hollow cylindrical or frustoconical shape surrounding the central axis X. In the example in Figure 2, the third partition plate 5 has a shape that widens towards the front. The third nozzle 52 is a hollow circular opening formed on the outer circumference of the second partition plate 4 at the tip side of the third partition plate 5, and ejects the third jet J3. The third jet J3 is a donut-shaped jet with a cross-section perpendicular to the central axis X.

[0019] The nozzle portion 2, as shown in Figure 2, includes a rib 34 provided on the outer periphery of the second partition plate 4, and an inner support member 36 that supports the second partition plate 4. The rib 34 and the inner support member 36 are members extending along the conveyance direction of the first jet flow J1. In the example of Figure 2, the rib 34 protrudes radially from the outer periphery of the second partition plate 4. The inner support member 36 has a thin plate shape protruding radially inward from the inner periphery of the second partition plate 4. A plurality of the ribs 34 and the inner support members 36 are provided at predetermined intervals in the circumferential direction. There is no limitation on the respective number of the ribs 34 and the inner support members 36, but in the example of Figure 2, four of each are arranged at equal intervals in the circumferential direction. The number of each of the ribs 34 and the inner support members 36 may be less than four, or may be five or more. The respective shape and number of the ribs 34 and the inner support members 36 can be set by experiment or simulation so as to achieve a desired support strength. Note that the rib 34 may not be provided, but when the nozzle portion 2 is formed of resin, providing the rib 34 during resin molding can suppress sink marks caused by molding of the inner support member 36.

[0020] The nozzle portion 2, as shown in Figure 2, includes a support member 46 that supports the third partition plate 5 on the outer periphery of the second partition plate 4. The support member 46 is a member extending along the conveyance direction of the second jet flow J2. In the example of Figure 2, the support member 46 has a thin plate shape extending radially outward from the outer periphery of the second partition plate 4. A plurality of the support members 46 are provided at predetermined intervals in the circumferential direction. There is no limitation on the number of the support members 46, but in the example of Figure 2, twelve support members are arranged at equal intervals in the circumferential direction. The number of the support members 46 may be less than twelve, or may be thirteen or more. The shape and number of the support members 46 can be set by experiment or simulation so as to achieve a desired support strength.

[0021] The plurality of fourth ejection ports 45 are provided on the second partition plate 4, are slit-shaped openings extending along the conveyance direction of the second jet flow J2, and eject a part of the second jet flow J2 as a fourth jet flow J4. The plurality of fourth ejection ports 45 are arranged at predetermined intervals along the circumferential direction of the second partition plate 4. The number of the fourth ejection ports 45 is not limited, but in the example of Fig. 2, eight fourth ejection ports are arranged at predetermined intervals in the circumferential direction. The shape of the fourth ejection port 45 is not limited, but in the example of Fig. 2, the fourth ejection port 45 has an elongated rectangular or elliptical shape with long sides in the front-rear direction.

[0022] Referring also to Fig. 3, the actions of the second ejection port 42, the fourth ejection port 45 and the support member 46 will be described. Fig. 3 is a diagram schematically showing the second jet flow J2 and the fourth jet flow J4 of the fluid conveyance device. Fig. 3(A) shows a case where the fourth ejection port 45 is provided, and Fig. 3(B) shows a case of a comparative example where the fourth ejection port 45 is not provided. As shown in Fig. 3(A), in the embodiment, the second ejection port 42, the fourth ejection port 45 and the support member 46 are arranged in the order of the support member 46, the fourth ejection port 45 and the second ejection port 42 along the conveyance direction of the third jet flow from the third ejection port 52 side.

[0023] In the case of the comparative example where the fourth ejection port 45 is not provided, as shown in Fig. 3(B), pressure loss (hereinafter referred to as "pressure loss R4") occurs on the inner surface of the second partition plate 4 due to the viscosity and pressure of the fluid. In particular, when the second partition plate 4 has a tapered shape whose diameter decreases toward the fluid conveyance direction, the pressure loss R4 of the fluid increases.

[0024] In the case where the fourth ejection port 45 is provided, as shown in Fig. 3(A), a part of the second jet flow J2 flows out from the fourth ejection port 45 and is ejected as the fourth jet flow J4, so that the pressure loss R4 of the fluid at that portion is greatly reduced. In addition, since the fourth ejection port 45 is located in front of the support member 46, the support member 46 acts as a wind shield for the third jet flow J3 to produce a wind shielding effect, which reduces mutual interference between the third jet flow J3 and the fourth jet flow J4, allowing each jet flow to flow smoothly. The pressure loss R4 is smaller when there are more fourth ejection ports 45 than when there are fewer. From the viewpoint of reducing the mutual interference of the jet flows, it is preferable that the number of the fourth ejection ports 45 is not greater than the number of the support members 46. Note that the pressure loss R4 increases as the intensity of the second jet flow J2 increases.

[0025] Refer to Figure 4 to explain the interference between the third jet J3 and the fourth jet J4. Figure 4 is a schematic diagram showing the third jet J3 and the fourth jet J4 of the fluid transport device 100. Figure 4(A) shows the case where the fourth nozzle 45 overlaps with the support member 46 in the circumferential direction, and Figure 4(B) shows a comparative example where the fourth nozzle 45 does not overlap with the support member 46 in the circumferential direction.

[0026] It is important for nozzle section 2 to deliver conditioned air to the object being conditioned while avoiding mixing with the surrounding non-conditioned air. However, as the jet from nozzle section 2 spreads, it creates an induction effect that draws in the surrounding non-conditioned air. When the conditioned air is cold air, it is desirable that the coldest air possible reaches the object being conditioned. However, if the induction effect is strong, the jet will draw in the surrounding warm air, which will mix with the cold air, making the air that reaches the object being conditioned warmer.

[0027] As shown in Figure 4(B), in the comparative example where the fourth nozzle 45 does not overlap with the support member 46 in the circumferential direction, and the fourth nozzle 45 is located where there is no support member 46, the fourth jet J4 collides with and interferes with the third jet J3. In this case, the flow of each jet becomes turbulent, the third jet J3 flows outward and spreads, and the function of suppressing the attraction effect is reduced.

[0028] Therefore, in this embodiment, as shown in Figure 4(A), the fourth nozzle 45 is positioned so as to overlap with the support member 46 in the circumferential direction. In this case, the third jet J3 is not ejected at the location of the support member 46, so interference with the fourth jet J4 is less likely to occur. In other words, the support member 46 functions as a windbreak, creating a wind-shielding effect on the third jet J3. Furthermore, by ejecting the fourth jet at locations where the third jet J3 is not ejected, the effect of suppressing the induction of ambient air can be further enhanced.

[0029] From the viewpoint of improving the air conditioning effect, it is desirable to be able to deliver a stronger airflow to the object being air-conditioned. Therefore, in the fluid conveying device 100 of this embodiment, the first nozzle 32 and the second nozzle 42 are arranged to protrude from the third nozzle 52 in the direction of fluid conveying. In this case, since the first nozzle 32 and the second nozzle 42 are located closer to the object being air-conditioned, a stronger airflow can be delivered to the object being air-conditioned. In the front-rear direction, the first nozzle 32 and the second nozzle 42 may be on the same plane as the third nozzle 52.

[0030] It is desirable that there is little mutual interference between the third jet J3 and the fourth jet J4. Therefore, in the fluid transport device 100 of the embodiment, the circumferential width of each of the fourth nozzles 45 is less than or equal to the circumferential width of each of the support members 46. In this case, since the circumferential width of the support members 46 is large, the wind-shielding effect of the support members 46 is increased, and the mutual interference between the third jet J3 and the fourth jet J4 is reduced.

[0031] From the viewpoint of reducing mutual interference between the third jet J3 and the fourth jet J4, it is desirable that each of the fourth nozzles 45 be able to benefit from the wind-shielding effect of the support member 46. Therefore, in the fluid transport device 100 of the embodiment, the number of the multiple fourth nozzles 45 is less than or equal to the number of the multiple support members 46. In this case, since each of the fourth nozzles 45 can benefit from the wind-shielding effect of the support member 46, mutual interference between the third jet J3 and the fourth jet J4 is reduced.

[0032] From the perspective of improving the effectiveness of air conditioning, it is desirable to be able to deliver a strong, localized breeze to the object being air-conditioned. Therefore, in the fluid conveying device 100 of this embodiment, the second partition plate 4 is narrowed in diameter in the direction of conveying the second jet J2. In this case, the second jet J2 can be narrowed, so that a strong, localized breeze can be delivered to the object being air-conditioned. The second partition plate 4 may also be a hollow cylindrical shape.

[0033] From the perspective of improving the effectiveness of air conditioning, it is desirable to be able to deliver a strong, localized breeze to the area to be air-conditioned. Therefore, in the fluid conveying device 100 of this embodiment, the first partition plate 3 is reduced in diameter in the direction of conveying the first jet J1, and the third partition plate 5 is increased in diameter in the direction of conveying the third jet J3. In this case, it is possible to achieve both a strong, localized breeze from the first jet J1 and a breeze that reaches a wide area from the third jet J3.

[0034] The features of the fluid conveying device 100 configured in this way will now be described. The fluid conveying device 100 is a fluid conveying device having a nozzle section 2 that ejects a fluid which is conditioned air. The nozzle section 2 includes a first nozzle 32, a second nozzle 42, a third nozzle 52, and a plurality of fourth nozzles 45. The first nozzle 32 is formed by a cylindrical or frustoconical first partition plate 3 and ejects the fluid as a first jet. The second nozzle 42 is formed in an annular shape by a cylindrical or frustoconical second partition plate 4 that surrounds the outer circumference of the first partition plate 3 and ejects the fluid as a second jet. The third nozzle 52 is formed in an annular shape by a cylindrical or frustoconical third partition plate 5 that surrounds at least a part of the outer circumference of the second partition plate 4 and ejects the fluid as a third jet. The support members 46 extend along the transport direction of the second jet and support the third partition plate 5 on the outer circumference of the second partition plate 4. Multiple support members 46 are provided at predetermined intervals in the circumferential direction. Multiple fourth nozzles 45 are provided in the second partition plate 4 and are slit-shaped openings that extend along the transport direction of the second jet J2, ejecting a portion of the second jet J2 as the fourth jet J4. Multiple fourth nozzles 45 are arranged at predetermined intervals along the circumferential direction of the second partition plate 4. The second nozzle 42, fourth nozzles 45 and support members 46 are arranged in the order of support members 46, fourth nozzles 45 and second nozzles 42, along the transport direction of the third jet from the third nozzle 52 side.

[0035] This configuration allows the fluid transport device 100 to reduce pressure loss at the second nozzle inside the second partition plate 4. Furthermore, by positioning the fourth nozzle 45 on the support member 46 of the second partition plate 4 and the third partition plate 5, the influence on the third jet J3 can be reduced. In addition, by ejecting the fourth jet J4 to areas where the third jet J3 was not ejected due to the support member 46, the effect of suppressing induction of ambient air can be further enhanced.

[0036] The above is a description of the embodiment.

[0037] The present disclosure has been described above based on embodiments. These embodiments are illustrative, and it will be understood by those skilled in the art that various alternatives are possible for each component or combination of each processing process, and that such alternatives are also within the scope of the present disclosure.

[0038] The following describes modified examples. In the drawings and descriptions of the modified examples, components and parts that are the same as or equivalent to those in the embodiments are denoted by the same reference numerals. Descriptions that overlap with those in the embodiments will be omitted as appropriate, and the descriptions will focus on the configurations that differ from those in the embodiments.

[0039] [First variation] Referring to Figures 5 and 6, the configuration of the fluid conveying device 200 according to the first modified example will be described. Figure 5 is a diagram of the fluid conveying device 200. Figure 5(A) shows the fluid conveying device 200 viewed from the oblique side, and Figure 5(B) shows the fluid conveying device 200 viewed from the front. Figure 6 is a diagram of the fourth nozzle 45 of the fluid conveying device 200. Figure 6(A) shows the fluid conveying device 200 as an example in which the rib 34 and the inner support member 36 do not overlap with the support member 46 in the circumferential direction. Figure 6(B) shows the fluid conveying device 100 of the embodiment as an example in which the rib 34 and the inner support member 36 overlap with the support member 46 in the circumferential direction.

[0040] The fluid conveying device 200 differs from the fluid conveying device 100 of the embodiment in that the circumferential positional relationship between the ribs 34 and the inner support member 36 and the support member 46 is different, but the other configurations are the same, so redundant explanations will be omitted and the differences will be explained in detail.

[0041] In the example shown in Figure 6(B), the ribs 34 and inner support members 36 overlap with the support members 46 in the circumferential direction, so the fourth nozzles 45 are not provided at the locations where the ribs 34 and inner support members 36 are located. In this case, the number of fourth nozzles 45 is 8, which is less than the number of support members 46, which is 12. A smaller number of fourth nozzles 45 is disadvantageous from the standpoint of reducing pressure loss R4.

[0042] In the example shown in Figure 6(A), the ribs 34 and inner support members 36 do not overlap with the support members 46 in the circumferential direction, so fourth nozzles 45 are provided at the positions of all support members 46. In other words, there are 12 fourth nozzles 45, which is the same as the number of support members 46, which is 12. In this case, there are more fourth nozzles 45 than in the example shown in Figure 6(B), which is advantageous from the viewpoint of reducing pressure loss R4.

[0043] In the example shown in Figure 6(A), the rib 34 and the inner support member 36 are positioned circumferentially, rotated 15° clockwise from the position of the support member 46. The rotational position of the rib 34 and the inner support member 36 is not limited to 15°, but can be arbitrarily set within the range in which the fourth nozzle 45 can be provided at all positions of the support member 46.

[0044] The above is a description of the first modified fluid conveying device 200. The first modified fluid conveying device 200 has the same operation and effect as the fluid conveying device 100 of the embodiment, and in addition, the number of fourth nozzles 45 is increased, so the pressure loss R4 can be reduced even further.

[0045] One aspect of this disclosure is as follows: (Item 1) A fluid transport device having a nozzle section (2) that ejects a fluid which is conditioned air, The nozzle portion (2) is A first nozzle (32) is formed by a cylindrical or truncated cone-shaped first partition plate (3) and ejects fluid as a first jet (J1), A second nozzle (42) is formed in an annular shape by a cylindrical or truncated cone-shaped second partition plate (4) so ​​as to surround the outer circumference of the first partition plate (3), and ejects fluid as a second jet (J2), A third nozzle (52) is formed in an annular shape by a cylindrical or truncated cone-shaped third partition plate (5) so as to surround at least a part of the outer circumference of the second partition plate (4), and ejects fluid as a third jet (J3), A plurality of support members (46) extend along the conveying direction of the second jet (J2) and support the third partition plate (5) on the outer circumference of the second partition plate (4), The second partition plate (4) is provided with a slit-shaped opening that extends along the transport direction of the second jet (J2), and comprises a plurality of fourth nozzles (45) from which a portion of the second jet (J2) is ejected as a fourth jet (J4), Equipped with, The plurality of fourth nozzles (45) are arranged at predetermined intervals along the circumferential direction of the second partition plate (4), The fluid transport device (100) is configured such that the second nozzle (42), the fourth nozzle, and the support member (46) are arranged in the order of the support member (46), the fourth nozzle, and the second nozzle (42) along the transport direction of the third jet (J3) from the third nozzle side.

[0046] (Item 2) The fluid conveying device (100) according to item 1, wherein the first nozzle and the second nozzle (42) are arranged to protrude from the third nozzle (52) in the direction of fluid conveying.

[0047] (Item 3) The fluid transport device (100) according to item 1, wherein the circumferential width of each of the fourth nozzles (45) is less than or equal to the circumferential width of each of the support members (46).

[0048] (Item 4) The fluid transport device (100) according to item 1, wherein the number of the multiple fourth nozzles (45) is less than or equal to the number of the multiple support members (46).

[0049] (Item 5) The fluid conveying device (100) described in item 1, wherein the second partition plate (4) is tapered in diameter in the direction of conveying the second jet (J2).

[0050] (Item 6) The fluid conveying device (100) described in item 5, wherein the first partition plate (3) is reduced in diameter in the direction of conveying the first jet (J1), and the third partition plate (5) is increased in diameter in the direction of conveying the third jet (J3). [Industrial applicability]

[0051] This disclosure can be used for fluid transport for purposes such as air conditioning. [Explanation of Symbols]

[0052] 2 Nozzle section, 3 First partition plate, 4 Second partition plate, 5 Third partition plate, 32 First nozzle, 34 Rib, 36 Inner support member, 42 Second nozzle, 45 Fourth nozzle, 46 Support member, 52 Third nozzle, 90 Air conditioning duct, 100, 200 Fluid conveying device, J1 First jet, J2 Second jet, J3 Third jet, J4 Fourth jet.

Claims

1. A fluid transport device having a nozzle section that ejects a fluid, which is conditioned air, The nozzle portion is A first nozzle is formed by a cylindrical or truncated cone-shaped first partition plate, and ejects fluid as a first jet, A second nozzle is formed in an annular shape surrounding the outer circumference of the first partition plate by a second partition plate that is cylindrical or truncated cone-shaped, and ejects fluid as a second jet. A third nozzle is formed in an annular shape by a cylindrical or truncated cone-shaped third partition plate, surrounding at least a portion of the outer circumference of the second partition plate, and ejecting fluid as a third jet, A plurality of support members extending along the transport direction of the second jet and supporting the third partition plate on the outer circumference of the second partition plate, The second partition plate is provided with a slit-shaped opening that extends along the transport direction of the second jet, and comprises a plurality of fourth nozzles that eject a portion of the second jet as a fourth jet, Equipped with, The plurality of fourth nozzles are arranged at predetermined intervals along the circumferential direction of the second partition plate. A fluid conveying device in which the second nozzle, the fourth nozzle, and the support member are arranged in the order of the support member, the fourth nozzle, and the second nozzle, along the conveying direction of the third jet from the third nozzle side.

2. The fluid conveying device according to claim 1, wherein the first nozzle and the second nozzle are arranged to protrude from the third nozzle in the direction of fluid conveying.

3. The fluid transport device according to claim 1, wherein the circumferential width of each of the fourth nozzles is less than or equal to the circumferential width of each of the support members.

4. The fluid transport device according to claim 1, wherein the number of the plurality of fourth nozzles is less than or equal to the number of the plurality of support members.

5. The fluid conveying device according to claim 1, wherein the second partition plate is reduced in diameter in the direction of conveying the second jet.

6. The fluid conveying device according to claim 5, wherein the first partition plate is reduced in diameter in the direction of conveying the first jet, and the third partition plate is increased in diameter in the direction of conveying the third jet.

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