JP2878385B2 - Ejector device - Google Patents

Description

Description: BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an ejector device, and more particularly to an ejector body in which an ejector body is separately formed by two blocks including a first block and a second block, and an air inlet port and a plurality of vacuums are provided. The present invention relates to an ejector device configured to communicate a port and an exhaust port with other devices. Ejectors have conventionally been used as devices for ejecting steam, air or water from nozzles to suck air and obtain a vacuum. This type of ejector generally includes a nozzle section and a diffuser section, and is configured to generate a negative pressure by a pressure drop at the nozzle section and kinetic energy. By the way, in the ejector device according to the related art,
The nozzle is separated from the diffuser, and
The nozzle itself is configured to be fitted to each of the plurality of formed wall portions. As a result, the assembling is not easy, and a special sealing member is required to further secure airtightness. In addition, since the nozzle portion and the diffuser portion are formed in a cylindrical shape, a cylinder having a large hole diameter is required to obtain a large flow rate. Have been pointed out. Accordingly, it is an object of the present invention to provide an ejector which has a simple structure, is easy to assemble, has a desired degree of vacuum, can be formed thin and small, occupies a small area, is suitable for mass production, and has a low production cost. It is to provide a device. In order to achieve the above object, an ejector device according to the present invention comprises a substantially flat first block body (12),
A flat second port connected to the block body (12) and having a plurality of vacuum ports (22a to 22c) formed between an air inlet port (20) at one end and an exhaust port (24) at the other end. An ejector body having a two-block body (14a) and having a chamber functioning as a fluid passage between a plane of the first block body (12) and a recess of the second block body (14a); Communication holes (16, 17) connected to the second block body (14a) and communicating with the chamber through the air introduction port (20), the exhaust port (24), and the vacuum ports (22a to 22c).
a to 17c and 18), wherein the plurality of partitions (38a to 38d) each having a groove are formed in the chamber, and the plurality of partitions (38a to 38d) are formed between the partitions (38a to 38d). The vacuum ports (22a to 22c) are formed in the plurality of nozzles (26a to 26d), and the plurality of nozzles (26a to 26d) include the groove and a cylindrical nozzle (40) selectively mounted in the groove. It is characterized by. Next, a reference example of the ejector device according to the present invention is shown in FIG. 1 and FIG. The ejector device 10 according to this reference example includes a first block body.
It is basically composed of 12 and the second block body 14. As will be easily understood from the first appendix, the first block body 12 is formed in a substantially flat plate shape. On the other hand, an air introduction port 20 is formed at one end of the second block body 14, and a plurality of vacuum ports 22a to 22c are formed substantially at the center thereof, and an exhaust port 24 is formed at the other end. It is formed. A plurality of nozzle portions 26a to 26d are provided on the upper portion of the second block
A chamber 28 and a chamber 30 are defined between the nozzles 26a to 26d and are defined between the smooth bottom surface of the block body 12 and the nozzles 26a to 26d. As is easily understood from FIG. 1, the chamber 30 is configured so as to gradually expand in its cross section through an inclined surface extending from the nozzle portions 26a to 26d, whereby the diffuser portion is formed. Is formed. In addition,
As shown in FIG. 2, the fluid passage has a rectangular cross section. In this case, another device 25 is connected to the second block body 14, and a communication hole 16 communicating with the air introduction port 20 and a communication hole 17a communicating with the vacuum ports 22a to 22c are connected to the device 25 constituting the air compressor. 17c and a communication hole 18 communicating with the exhaust port 24. In FIG. 1, reference numeral 32,
Numeral 34 is a check valve interposed in the passage 36 communicating with the vacuum ports 22b and 22c. Therefore, in the above configuration, the air introduction port
When the compressed air is released from the chamber 20 toward the chamber 28, the compressed air is restricted by the nozzles 26a to 26d, and the vacuum port 22a
Finally, the air introduced from the pumps 22 to 22c is drawn out from the exhaust port 24 while being sucked. Therefore, a desired negative pressure can be obtained at the vacuum ports 22a to 22c. By the way, in the ejector device (not shown) according to the prior art, in order to obtain the same flow rate as that of the reference example, the size of the ejector device itself must be larger than that of this reference example. That is, the structure of the conventional ejector device is more complicated than that of the reference example, and the size of the entire ejector device becomes larger because the nozzle portion and the diffuser portion are cylindrical. However, in the reference example, the ejector device having a very simple structure and a thin plate can be obtained by forming the fluid passage including the nozzle portion and the diffuser portion into a rectangular cross section. Further, in this reference example, since the fluid passage is formed to have a rectangular cross section, it is possible to obtain a miniaturized ejector device. Further, in this reference example, as described above, the ejector device 10 is made up of a flat plate-shaped first block body 12 and a second block body.
Since the first and second blocks 14 and 14 are formed, the first block 12 can be formed extremely easily, and the shape of the second block 14 can be easily obtained by casting or the like. Therefore, the ejector device 10 can be easily assembled and easily incorporated into another device 25, and the desired negative pressure can be easily obtained. Moreover, according to the ejector device 10 according to this reference example,
The first block body 12 and the second block body 12 are arranged along the flow direction of the fluid.
Since the block body 14 is configured separately, there is an advantage that even if a seal member is applied to each joint portion, it can be mounted very easily, and sufficient airtightness can be ensured. Furthermore, according to the reference example, another device 25 can be connected to the second block body 14, and therefore can be easily incorporated into the other device 25 constituting the pneumatic device. Next, FIG. 3 shows an ejector device 11 according to an embodiment of the present invention.
Is shown. In this case, the same reference numerals as those in the above-mentioned reference example indicate the same components. The ejector device 11 according to this embodiment is basically composed of a first block body 12 formed in a substantially flat plate shape and a second block body 14a having a concave portion. An air introduction port 20 (not shown) is formed at one end of the second block body 14a, and a plurality of vacuum ports 22a to 22c are formed substantially at the center thereof. An exhaust port 24 is formed. In the concave portion of the second block body 14a, a plurality of partitions 38a to 38d are formed at predetermined intervals by expanding a main body portion, and the partition 38a to 38d has a nozzle having a rectangular cross-sectional groove. Parts 26a to 26d are provided. A flat rectangular cylindrical nozzle 40 is selectively mounted in each of the grooves. In this case, another device 25 is connected to the second block body 14a, and a communication hole 16 (not shown) communicating with the air introduction port 20 and a vacuum port 22a
The communication holes 17a to 17c (not shown) communicating with the exhaust ports 24 and the communication holes 18a (not shown) communicating with the exhaust port 24 are provided. According to the configuration of the ejector device 11 according to the present embodiment, the molding process is further simplified, and the first-stage nozzle portion 26a that requires strict dimensioning is shown in FIG. So that a separately formed rectangular nozzle 40 is
You may make it fit in the groove part formed in 38a. Of course, the rectangular nozzles 40 can be selectively fitted similarly to the other partition walls 38b to 38d. According to this configuration, the ejector device 11 according to the thin plate-shaped embodiment including the nozzle portion and the diffuser portion is obtained. As a result, as described in the above-described reference example, the ejector device 11 in which the degree of vacuum is diversified because it can be configured in multiple stages is provided. Can be obtained. As described above, according to the present invention, the fluid passage including the nozzle portion and the diffuser portion is configured to have a rectangular cross section, and the structure is extremely simple, so that the assembly is easy and the desired degree of vacuum is reduced. As a result, the ejector device can be formed thin and small, and the area occupied by the ejector device can be further reduced by stacking the blocks in multiple stages. In addition, since the number of parts is reduced, an ejector device having a low production cost can be obtained. Moreover, according to the present invention, since it can be incorporated into another device, the effect of diversifying the application as an ejector device can be obtained. As described above, the present invention has been described with reference to the preferred embodiments. However, the present invention is not limited to these embodiments, and various improvements and design changes can be made without departing from the gist of the present invention. Of course.

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a longitudinal sectional view showing a reference example of the ejector device of the present invention, FIG. 2 is a sectional view taken along line II-II of FIG. 1, and FIG. 3 is an embodiment of the present invention. It is an exploded perspective view of such an ejector device. 10, 11 ejector device, 12 first block body 14, 14a second block body 16, communication hole 17a-17c communication hole 18, communication hole 22a-22c vacuum port , 25 ... Other devices 26a to 26d ... Nozzle part, 38a to 38d ... Partition wall 40 ... Nozzle

────────────────────────────────────────────────── (5) References JP-A-57-83699 (JP, A) JP-B-45-35946 (JP, B1) (58) Fields investigated (Int. Cl. ⁶ , DB name) F04F 5/00

Claims (1)

(57) [Claims] A substantially flat first block body (12) is connected to the first block body (12), and is disposed between an air introduction port (20) at one end and an exhaust port (24) at the other end. A flat second block body (14a) formed with a plurality of vacuum ports (22a to 22c), wherein a flat surface of the first block body (12) and a concave portion of the second block body (14a) are formed. An ejector body provided with a chamber functioning as a fluid passage therebetween; and an ejector body connected to the second block body (14a), the air introduction port (20), the exhaust port (24), and the vacuum port (22).
a to 22c) through the communication holes (16, 17a to 1)
In an ejector device including another device (25) in which 7c and 18) are formed, a plurality of partition walls (38a to 38d) having a groove portion are formed in the chamber, and between the partition walls (38a to 38d). The vacuum port (22
a to 22c) and a plurality of nozzle portions (26a
To 26d) the ejector device, comprising the groove portion and a cylindrical nozzle (40) selectively mounted in the groove portion.