JP2007192210A - Nozzle, jet generator, cooling device, and electronic equipment - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To mix with outside air efficiently when discharging gas and suck outside air efficiently to generate a combined jet efficiently. <P>SOLUTION: A nozzle main body 20 of a nozzle 2 mounted on the jet generator 10 has a slope 20a on a surface of its upper part and a slope 20b on a surface of its lower part, a flow passage 21 having a discharge port 21a and a flow passage 22 having a discharge port 22a are provided on the slope 20a, and a flow passage 23 having a discharge port 23a and a flow passage 24 having a discharge port 24a are provided on the slope 20b. Since each flow passage is provided on the slopes, a sufficient space is formed between each discharge port and a heat sink when combined with the heat sink, outside air is efficiently mixed therewith when discharging air from the jet generator 10 to generate a synthetic jet, supply it to a heat sink side, and suck outside air efficiently without bringing the discharged air back. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

  The present invention relates to a jet generating device that generates a synthetic jet of gas, a nozzle used in the jet generating device, a cooling device using the jet generating device, and an electronic apparatus equipped with the cooling device.

  Conventionally, an increase in the amount of heat generated from a heating element such as an IC (Integrated Circuit) associated with high performance of a PC (Personal Computer) has been a problem, and various heat radiation technologies have been proposed or commercialized. Yes.

  As a heat dissipation method, a composite jet is generated by discharging air in a pulsating flow, and this combined jet is supplied to a heat dissipation fin (heat sink), etc., and the temperature boundary layer formed on the surface of the heat dissipation fin is efficient. There is a method of well destroying and dissipating heat (see, for example, Patent Document 1). Such a jet generating device has a housing having an opening and a diaphragm that causes a pressure change in the air in the housing. When the diaphragm vibrates, a pressure change occurs in the casing, and air is discharged as a pulsating flow through the opening, thereby generating a synthetic jet.

The synthetic jet is generated according to the following principle. As air flows when air is discharged from the opening of the housing, the air pressure around the opening outside the housing is reduced, so that the surrounding air is caught in the air discharged from the opening. A synthetic jet is generated (see Patent Document 1 below).
Japanese Patent Laying-Open No. 2005-256834 (paragraph [0079], FIG. 1)

  However, in the jet generating device described in Patent Document 1, the nozzle for discharging the gas is provided so as to protrude from the side surface of the casing substantially perpendicular to the gas discharging direction. Is combined with a heat generator such as a heat sink, the space between the periphery of the nozzle and the heat sink becomes narrow. As a result, the nozzle itself becomes an obstacle to the entrainment of external gas, and the synthetic jet cannot be generated by efficiently entraining the gas from the outside.

  Further, in the jet flow generating device, gas is discharged from one of the upper and lower nozzles, and at the same time, outside air is sucked in from the other nozzle. However, since the space is narrow, the gas is discharged from one nozzle. The other nozzle pulls back the sucked gas and sucks it, and the other nozzle cannot suck the outside air efficiently. At the same time, it is difficult to efficiently generate the synthetic jet.

  In view of the circumstances as described above, an object of the present invention is to provide a nozzle capable of efficiently entraining outside air during gas discharge and generating a synthetic jet efficiently by efficiently sucking outside air. The present invention is to provide a jet generating device using the above, a cooling device using the jet generating device, and an electronic apparatus equipped with the cooling device.

  Another object of the present invention is to provide a nozzle, a jet flow generating device, a cooling device, and an electronic device that can reduce noise when gas is discharged.

  In order to achieve the above-described object, a nozzle according to a main aspect of the present invention includes a casing having an opening and containing gas therein, a vibrating body provided in the casing so as to vibrate, and the vibration. A nozzle that is used in a jet generating device having a first chamber and a second chamber that are respectively provided in the casing with a body interposed therebetween, and is capable of discharging the gas as a pulsating flow by vibration of the vibrating body. The upper surface and the lower surface are provided so as to cover the opening of the housing, and the distance between the upper surface and the lower surface is gradually reduced toward the gas discharge direction. A nozzle body formed, a first flow path having a first discharge port on the upper surface of the nozzle body, and communicating the first chamber with the outside of the nozzle body; and the nozzle body Has a second discharge port on the lower surface, front And said nozzle body outer second chamber; and a second flow path communicating.

  In the jet flow generating device, the vibrating body periodically reciprocates so that gas is discharged from the first chamber through the first flow path and through the second flow path. The external gas is sucked into the second chamber, the gas is discharged from the second chamber through the second flow path, and the external gas is discharged through the first flow path. The operation of sucking into the first chamber is repeated intermittently. The discharged gas is applied to a high heat part such as a heat sink or an IC.

  According to the present invention, the first flow path and the second flow path are the upper part of the nozzle body formed such that the distance between the upper surface and the lower surface gradually decreases in the gas discharge direction. Since the first discharge port and the second discharge port are respectively provided on the surface and the lower surface, each flow path is provided in the nozzle body (on the vertical surface thereof) with a constant distance between the upper surface and the lower surface. As compared with the case where the discharge gas is provided, a sufficient space can be ensured between the high-heat portion to which the discharged gas is applied and each discharge port. Thereby, the volume of the gas drawn into the high heat part side from the outside by the flow of the discharged gas can be increased, and a synthetic jet can be generated efficiently. As a result, it is possible to increase the flow rate of the gas hitting the hot zone without increasing the discharge volume from the jet flow generator. The heat resistance of the high heat part can be reduced while suppressing the heat, and the heat generated from the high heat part can be effectively dissipated.

  In addition, by providing the first flow path and the second flow path on the upper surface and the lower surface, the space between the first flow path and the second flow path is between the upper surface and the lower surface. Since each of the flow paths is partitioned by a portion in the discharge direction, the other flow path is prevented from pulling back the gas discharged from one flow path as much as possible, and external gas can be sucked efficiently. it can.

  As a driving method of the vibrating body, for example, an electromagnetic action, a piezoelectric action, or an electrostatic action can be used. Examples of the gas include air, but are not limited thereto, and may be nitrogen, helium gas, argon gas, or other gases.

  The nozzle further includes a first step portion formed on the upper surface of the nozzle body and a second step portion formed on the lower surface of the nozzle body, and the first flow path. Is provided so as to have the first discharge port in the first step portion, and the second flow path may be provided so as to have the second discharge port in the second step portion. Good.

  Accordingly, since the first flow path and the second flow path are respectively provided in the first step portion and the second step portion, a space corresponding to the step is provided between the jet flow generating device and the high heat portion. And the volume of the gas drawn from the outside to the high heat part side can be increased by the flow of the gas discharged from the first and second discharge ports.

  In addition, since each discharge port is partitioned by the portions of the first step portion and the second step portion that respectively advance in the discharge direction from the first discharge port and the second discharge port, one flow path It is possible to prevent the gas discharged from the gas from being pulled back by the other flow path as much as possible.

  The nozzle further includes a first inclined surface formed on the upper surface of the nozzle body and a second inclined surface formed on the lower surface of the nozzle body, and the first flow path includes the first flow path. The first discharge port may be provided on the first slope, and the second flow path may be provided so as to have the second discharge port on the second slope.

  As a result, since the first flow path and the second flow path are respectively provided on the first slope and the second slope, a space for the slope is created between the jet flow generating device and the high heat section. The volume of the gas drawn from the outside to the high heat part side by the flow of the gas discharged from the first and second discharge ports can be increased.

  In addition, since each discharge port is partitioned by a portion of the first inclined surface and the second inclined surface that proceeds in the discharge direction from each discharge port, the other flow channel of the gas discharged from one flow channel Can be prevented as much as possible.

  Furthermore, since the first discharge port and the second discharge port themselves have an inclination, the width of the flow of the gas discharged from each discharge port is widened, and the contact area of the gas with respect to the high heat part is increased. The high heat part can be efficiently dissipated. This is particularly effective when a heat sink having a large area is radiated.

  In the nozzle, the first stepped portion includes a third stepped portion provided on the upper surface, and a fourth stepped portion provided at a position lower than the third stepped portion on the upper surface. The second stepped portion includes a fifth stepped portion provided on the lower surface, and a sixth stepped portion provided at a position higher than the fifth stepped portion on the lower surface. The first flow path includes a third flow path having a third discharge port in the third stepped portion, and a fourth flow path having a fourth discharge port in the fourth stepped portion. And the second flow path has a fifth flow path having a fifth discharge port in the fifth step portion and a sixth discharge port in the sixth step portion. You may have a 6th flow path.

  In this configuration, there are two upper and lower channels, a third flow channel and a fourth flow channel respectively communicating with the first chamber, and a fifth flow channel and a sixth flow channel respectively communicating with the second chamber. A flow path is provided. The flow velocity of the gas discharged from each discharge port increases as the diameter of the flow path decreases, and the volume of the gas drawn from the outside to the high heat part side increases due to the flow of the discharged gas. Therefore, if other conditions such as the amplitude of the vibrating body and the capacity of each chamber are constant, by providing two upper and lower flow paths, the diameter of the flow path can be reduced compared with the case where the upper and lower flow paths are one each. Without increasing, that is, while maintaining the flow rate of the discharged gas, it is possible to increase the volume of the gas drawn into the high heat part side.

  Further, in this configuration, the distance between the upper surface and the lower surface is gradually reduced by providing two step portions that respectively extend in the discharge direction, and the flow paths are respectively provided in the two upper and lower step portions. Therefore, the distance from the third discharge port provided in the third step portion to the high heat portion and the distance from the fifth discharge port provided in the fifth step portion to the high heat portion are respectively It becomes longer than the distance from the 4th discharge port and the 6th discharge port to the high heat part etc., and a space is created there. Thereby, the volume of the gas drawn into the high heat part side from the exterior by the flow of the gas discharged from each flow path can be enlarged.

  Further, the positions of the third discharge port and the fourth discharge port, and the fifth discharge port and the sixth discharge port in the discharge direction are different from each other. The third discharge port and the fourth discharge port are independently independent of each other, and the fifth discharge port and the sixth discharge port are individually independently and efficiently sucked in outside air. And thereby a synthetic jet can be efficiently generated.

  In the nozzle, the first flow path has a third flow path having a third discharge port on the first slope and a position lower than the third discharge port on the first slope. A fourth flow path having four discharge ports, and the second flow path includes a fifth flow path having a fifth discharge port on the second slope and a second slope. You may have the 6th flow path which has a 6th discharge port in the position higher than the said 5th discharge port.

  Thus, by providing two flow paths on each of the first slope and the second slope, the volume of the gas drawn into the heat sink or the like can be increased while maintaining the flow rate of the discharged gas. By securing a sufficient space between the third discharge port and the fifth discharge port and the high heat part, the volume of the gas drawn into the heat sink or the like from the outside can be increased. Also, each of the two upper and lower flow paths can independently and efficiently suck outside air without depending on the intake operation of one of the flow paths.

  Furthermore, since the discharge ports provided on the upper and lower slopes are inclined, the flow of the discharged gas is diffused, and heat can be efficiently radiated by applying the gas to a wider area of the high heat part. .

  The nozzle may further include a partition plate extending so as to protrude from an end portion of the nozzle body in the discharge direction.

  Thereby, since the flow of the gas discharged from the first discharge port or the second discharge port is partitioned by the partition plate, the other discharge port pulls back the gas discharged from one discharge port, etc. The influence of the gas discharged from the discharge port on the operation of the other discharge port is eliminated as much as possible, and the discharge operation and the intake operation can be performed independently and efficiently.

  In the nozzle, the partition plate may be integrally formed from the upper surface and the lower surface, and the thickness in the vertical direction may gradually decrease toward the ejection direction.

  Thereby, the unevenness | corrugation between a partition plate and an upper surface or a lower surface can be excluded as much as possible, and the discharged gas can be guided smoothly.

  In the nozzle, the first stepped portion includes a first vertical surface formed in the vertical direction, a first horizontal surface continuously formed in a horizontal direction from the first vertical surface, and the first horizontal surface. A second vertical surface formed at a position lower than the first vertical surface in the vertical direction from one horizontal plane, and the second stepped portion is a third vertical surface formed in the vertical direction. A vertical plane, a second horizontal plane continuously formed in the horizontal direction from the third vertical plane, and a position higher than the third vertical plane in the vertical direction from the second horizontal plane. The first flow path is formed so that the first discharge port extends over the first vertical surface, the first horizontal surface, and the second vertical surface. The second flow path is configured such that the second discharge port has the third vertical surface, the second horizontal surface, and Serial fourth may be provided so as to be formed over the vertical surface.

  Thereby, since the trajectory of the gas discharged from the first discharge port and the second discharge port changes in the diffusion direction, the thermal resistance of the high-heat part having a large area can be efficiently reduced.

  In the nozzle, the first stepped portion includes a third stepped portion provided on the upper surface, and a fourth stepped portion provided at a position lower than the third stepped portion on the upper surface. A fifth step portion provided at a position lower than the fourth step portion on the upper surface, and the second step portion includes a sixth step portion provided on the lower surface. A seventh step portion provided at a position higher than the sixth step portion on the lower surface; and an eighth step portion provided at a position higher than the seventh step portion on the lower surface; The first flow path includes a third flow path having a third discharge port in the third stepped portion, and a fourth flow path having a fourth discharge port in the fourth stepped portion. A flow path and a fifth flow path having a fifth discharge port in the fifth step portion, and the second flow path has a sixth discharge port in the sixth step portion. A sixth flow path having a seventh discharge port in the seventh step portion, and an eighth flow path having an eighth discharge port in the eighth step portion. You may have.

  Thus, by providing three flow paths on the upper surface and the lower surface of the nozzle body, the amplitude of the vibrating body, the capacity of each chamber, etc. (discharge flow rate from each chamber) compared to the two cases, respectively. If other conditions are constant, the flow rate of the gas drawn into the high heat part side can be further increased. In addition, as compared with the case where there are two upper and lower flow paths, more space is created between each discharge port and the high heat part, so that it is possible to further increase the flow rate of the gas drawn into the high heat part side.

  In the nozzle, each of the first step portion and the second step portion may have an R shape.

  Thereby, compared with the case where each level | step-difference part is formed in edge shape, since more space is produced between each discharge part and a high heat | fever part, the flow volume of the gas drawn in to the high heat | fever part side can be enlarged further. . Moreover, compared with the case where each level | step-difference part is formed in edge shape, noise can be further suppressed by reducing the air resistance at the time of discharging gas from each discharge part, and inhaling gas. .

  In the nozzle, the first flow path and the second flow path may be formed such that each flow path diameter gradually decreases in the discharge direction.

  As a result, by forming each channel in a taper shape in the discharge direction, it is possible to reduce the fluctuation of the pressure in each channel due to the vibration of the vibrating body as compared to the case where it is not formed in a taper shape. Therefore, noise can be reduced. Moreover, since the maximum flow rate can be reduced without reducing the discharge flow rate of the gas discharged from each discharge port, the discharge flow rate per unit flow rate can be increased. This can also reduce noise.

  In the nozzle, the first flow path and the second flow path may each have a plurality of grooves formed in the discharge direction.

  In this case, the cross section in the radial direction of each flow path has a polygonal shape. Thereby, noise can be reduced by reducing the fluctuation of the pressure in each flow path. Noise can also be reduced by increasing the discharge flow rate per unit flow rate.

  In the nozzle, the first discharge port and the second discharge port may each have an R shape.

  Thereby, by reducing the air resistance in the vicinity of each discharge port, the fluctuation of the pressure in each flow path can be reduced and noise can be reduced. Further, by adding an R shape to each discharge port, it is possible to substantially increase the diameter of each discharge port to increase the discharge flow rate per unit flow rate and reduce noise.

  A jet generating device according to another aspect of the present invention is a jet generating device capable of discharging gas as a pulsating flow, and has an opening, a housing containing the gas inside, and vibration in the housing. A vibrating body provided in a possible manner, a first chamber and a second chamber respectively provided in the casing with the vibrating body interposed therebetween, an upper surface and a lower surface, and covering the opening A nozzle body formed such that a distance between the upper surface and the lower surface gradually decreases in the gas discharge direction; and a first discharge port on the upper surface of the nozzle body. A first flow path communicating with the first chamber and the outside of the nozzle body; a second discharge port on the lower surface of the nozzle body; and the second chamber and the nozzle body. A nozzle having a second flow path communicating with the outside; ; And a first flow path and the second through the flow channel to drive the vibrating member to eject the casing of the gas as pulsating drive.

  In the jet flow generating device, the housing includes a first intake port for sucking the gas into the first chamber, and a second intake port for sucking the gas into the second chamber. The jet generating device is provided so as to be able to open and close the first intake port, and opens and closes the first check valve for preventing a reverse flow of the sucked gas and the second intake port. A second check valve may be further provided, which is provided so as to prevent backflow of the sucked gas.

  As a result, the amount of gas sucked can be increased to increase the amount of gas discharged to the high heat part side, and the gas discharged from each discharge port can be prevented from being pulled back.

  A cooling device according to still another aspect of the present invention is a cooling device having a jet generating device capable of discharging gas as a pulsating flow, the housing having an opening and containing gas therein, and the housing A vibrating body provided in the body so as to vibrate, a first chamber and a second chamber respectively provided in the housing with the vibrating body interposed therebetween, an upper surface and a lower surface, and the opening A nozzle body provided so as to cover, and formed such that a distance between the upper surface and the lower surface gradually decreases in the gas discharge direction; and a first body on the upper surface of the nozzle body. A first flow path having a discharge port and communicating between the first chamber and the outside of the nozzle body; a second discharge port on the lower surface of the nozzle body; and the second chamber, A second flow path communicating with the outside of the nozzle body A jet generating device having a slur and a driving unit for driving the vibrating body to discharge the gas in the housing as a pulsating flow through the first flow path and the second flow path; A heat sink having a ventilation part capable of taking in the gas on a side for receiving the gas discharged from the first discharge port or the second discharge port;

  With this configuration, a sufficient space can be secured around the first discharge port or the second discharge port, so that a sufficient amount of outside air is entrained by the flow of the discharged gas to efficiently generate a synthetic jet. Accordingly, the volume of the gas drawn into the heat sink from the base is increased, and the flow rate of the gas discharged from the outlet of the heat sink is increased, so that the heat sink can be efficiently dissipated.

  In the cooling device, the heat sink includes a plurality of fins arranged side by side so as to form a plurality of the ventilation portions in a first direction orthogonal to the discharge direction, and the first flow path and the first A plurality of the two flow paths are respectively provided in the first direction so that gas discharged from one of the first discharge ports and one of the second discharge ports passes through the plurality of ventilation portions. It may be.

  This makes it possible to reduce the flow resistance of each flow path and reduce the pressure loss while realizing the same thermal resistance as compared with the case where each discharge port corresponds to one ventilation section. Therefore, the power consumption of the drive unit can be reduced.

  An electronic apparatus according to still another aspect of the present invention is an electronic apparatus having a jet generating device capable of discharging gas as a pulsating flow, having a heating element, an opening, and a casing containing the gas inside And a vibrating body provided in the housing so as to vibrate, a first chamber and a second chamber respectively provided in the housing across the vibrating body, and an upper surface and a lower surface. A nozzle body provided to cover the opening and formed such that a distance between the upper surface and the lower surface gradually decreases in the gas discharge direction; and the upper surface of the nozzle body A first discharge port, a first flow path communicating the first chamber and the outside of the nozzle body, a second discharge port on the lower surface of the nozzle body, 2nd flow path which connects 2 chambers and the said nozzle body exterior A jet generating device having a nozzle and a drive unit that drives the vibrating body to discharge the gas in the housing as a pulsating flow through the first flow path and the second flow path, A heat sink having a ventilation part capable of taking in the gas from the outside on a side for receiving the gas discharged from the first discharge port or the second discharge port; a second unit capable of holding the jet generating device and the heat sink; Housing.

  Here, the heating element is, for example, an IC, and the electronic device is, for example, a computer (in the case of a personal computer, it may be a laptop type or a desktop type), a PDA (Personal Digital Assistance), an electronic dictionary. Camera, display device, audio / visual device, mobile phone, game device, car navigation device, robot device, and other electrical appliances.

  As described above, according to the present invention, it is possible to efficiently generate a synthetic jet by entraining outside air efficiently when gas is discharged and efficiently sucking outside air. Further, noise during gas discharge can be reduced.

  Hereinafter, embodiments of the present invention will be described with reference to the drawings.

(First embodiment)
First, a first embodiment of the present invention will be described. FIG. 1 is a perspective view showing an appearance of a jet generating apparatus having a nozzle according to an embodiment of the present invention, and FIG. 2 is a cross-sectional view of the jet generating apparatus shown in FIG. The jet generating device functions as a cooling device when combined with a heat radiating member such as a heat sink.

  The jet flow generating device 10 includes a housing 1, a nozzle 2 attached to the housing 1, and a vibration actuator 15 disposed in the housing 1. First, the housing 1 and the vibration actuator 15 will be described.

  As shown in FIG. 2, the housing 1 is provided with a vibration actuator 15 having a vibration plate 33, a driving device 35, and an elastic support member 36. The elastic support member 36 is attached to the inner wall of the housing 1 and elastically supports the periphery of the diaphragm 33. The inside of the housing 1 is divided into two by the diaphragm 33 and the elastic support member 36, and the chambers 3 and 4 are formed. The chamber 3 formed in the upper portion communicates with the outside of the housing 1 via a flow path 21 and a flow path 22 of the nozzle 2 described later, and the chamber 4 formed in the lower portion includes a flow path 23 and a flow path described later. 24 communicates with the outside of the housing 1.

  The drive device 35 is disposed, for example, in the upper chamber 3. For example, a magnet 17 magnetized in the vibration direction R of the diaphragm 33 is built inside the cylindrical yoke 16, and for example, a disk-shaped yoke 34 is attached to the magnet 17. The magnet 17 and the yokes 16 and 34 constitute a magnetic circuit. A coil bobbin 19 around which a coil 18 is wound enters and leaves the space between the magnet 17 and the yoke 16. The coil bobbin 19 is fixed to the surface of the diaphragm 33. By supplying an electrical signal from the drive signal generator 5 to the drive device 35 configured in this way, the diaphragm 33 can be vibrated in the direction of the arrow R.

  The diaphragm 33 is made of, for example, resin, paper, or metal. In particular, when the diaphragm 33 is made of paper, the weight is very reduced. Paper is not as easy to make in an arbitrary shape as resin, but it is advantageous in reducing the weight. When the diaphragm 33 is a resin, it can be easily formed into an arbitrary shape by molding. On the other hand, when the diaphragm 33 is a metal, it is made of, for example, copper, aluminum, or stainless steel. Alternatively, magnesium may be used. Magnesium is advantageous because it is lightweight and can be injection molded. The diaphragm 33 may not be a flat plate, and may be, for example, a three-dimensional vibrator. The planar shape of the diaphragm 33 (the shape of the surface substantially perpendicular to the vibration direction R) may be a circle, an ellipse, a rectangle, or a combination thereof.

  The housing 1 is made of, for example, resin, rubber, or metal. Resin and rubber are easy to produce by molding and are suitable for mass production. Further, when the housing 1 is made of resin or rubber, it is possible to suppress sound generated by driving the vibration actuator 15 or airflow sound generated by vibration of the vibration plate 33. That is, when the housing 1 is made of resin or rubber, the attenuation rate of those sounds also increases, and noise can be suppressed. Furthermore, it can respond to weight reduction and becomes low-cost. When the housing 1 is produced by injection molding of resin or the like, it can be molded integrally with the nozzle 2. However, as shown in FIGS. 1 and 2, the jet flow generating device 10 can be easily manufactured if the casing 1 and the nozzle 2 are separate. When the housing 1 is made of a material having high thermal conductivity, for example, metal, heat generated from the driving device 35 can be released to the housing 1 and radiated to the outside of the housing 1. Examples of the metal include aluminum and copper. When considering thermal conductivity, carbon is not limited to metal. As the metal, magnesium that can be injection-molded can be used. When the leakage magnetic field from the magnetic circuit of the driving device 35 affects other devices of the device, it is necessary to devise a method for eliminating the leakage magnetic field. One of them is to make the housing 1 from a magnetic material such as iron. Thereby, the leakage magnetic field is reduced to a considerable level. Further, it may be a ceramic case for use at high temperatures or for special applications.

  The elastic support member 36 is made of, for example, rubber or resin. The shape of the elastic support member 36 depends on the shape (outer shape) of the diaphragm 33. As shown in FIG. 2, the elastic support member 36 has a cross-sectional shape having one peak and one valley. Hereinafter, this is referred to as a two-roll type elastic support member. In the case of an elastic support member consisting of only one valley or only one peak, the height in the vertical direction in FIG. 2 increases and the thickness increases. When there are a plurality of crests and troughs, complicated movements other than the vibration direction R may occur when the diaphragm 33 vibrates, which may reduce efficiency. Moreover, there is a risk that noise will increase. Therefore, it is desirable to use a two-roll type elastic support member. However, the 2-roll type does not necessarily have to be used.

  Next, the nozzle 2 will be described. The nozzle body 20 of the nozzle 2 is attached to the opening 1 a on the front surface of the housing 1.

  The nozzle body 20 has an inclined surface 20a on the upper surface and an inclined surface 20b on the lower surface. The slope 20a and the slope 20b are formed so that the distance between the upper surface and the lower surface of the nozzle body 20 (distance in the Z-axis direction in both figures) gradually decreases in the Y-axis direction in both figures. Yes. A discharge port 21a is provided in the upper part of the inclined surface 20a, and a discharge port 22a is provided in the lower part. Inside the nozzle body 20, an air flow path 21 and a flow for communicating the discharge ports 21a and 22a and the chamber 3 respectively. A path 22 is provided.

  Similarly, a discharge port 23a is provided at the lower portion of the inclined surface 20b, and a discharge port 24a is provided at the upper portion. Inside the nozzle body 20, air flow paths that connect the discharge ports 23a and 24a and the chamber 4 respectively. 23 and a flow path 24 are provided.

  As will be described later, the flow channel 21, the flow channel 22, the flow channel 23, and the flow channel 24 discharge air from the chambers 3 and 4 to the outside through the discharge ports, as indicated by solid line arrows in FIG. As indicated by the dashed arrows, outside air can be sucked into the chambers 3 and 4 through the respective discharge ports.

  The length of the channel 21 and the length of the channel 23 are substantially the same. The lengths of the flow path 22 and the flow path 24 are substantially the same, and are provided in the horizontal direction (Y-axis direction) from below the slope 20a and above the slope 20b, respectively. It is longer than the length of 23. Although the diameter of each flow path is substantially the same, you may form so that it may differ by the flow path 21 and the flow path 22, and the flow path 23 and the flow path 24. FIG.

  A partition plate 25 is provided at an end of the nozzle body 20 in the air discharge direction (Y-axis direction) to partition the flow of air discharged or sucked from the flow paths.

  Next, the heat sink combined with the jet flow generating device 10 will be described. FIG. 3 is a perspective view of the heat sink, and FIG. 4 is a perspective view of one fin constituting the heat sink.

  As shown in both figures, the heat sink 40 is configured by a plurality of fins (heat radiating plates) 41 that receive air discharged from the jet flow generating device 10 being continuously arranged in the X-axis direction. The fin 41 is a flat plate having a thickness of about 0.3 mm in which end portions 42a and 42b in the vertical direction (Y-axis direction in FIG. 3) are bent by a predetermined length C in the same direction (X-axis direction in FIG. 3). It is composed of The predetermined length is determined by the size of the fin 41. For example, when the length D of the unfolded portion is about 12 mm, the predetermined length is about 2.3 mm.

  Further, the fin 41 has notches 43a and 43b as ventilation portions on the side where the air discharged from the jet flow generating device 10 is received. The notches 43a and 43b are formed such that the bent both end portions 42a and 42b are rectangular by a predetermined length E in the Z-axis direction from the end portion on the side receiving the air discharged from the jet flow generating device 10. It is cut and formed. The predetermined length is, for example, 4 mm.

  Here, the notches 43a and 43b can be formed only in either one of the upper and lower sides, but two are preferable because the gas intake from the outside is reduced compared to the case where both are present. Further, the ventilation portion is not limited to the notches 43a and 43b, but may be a through hole.

  The heat conductive member used for the fin 41 is not limited to a copper-based alloy, and may be a material having a high heat conductivity such as an aluminum-based alloy.

  FIG. 5 is a perspective view showing a state in which the jet flow generating device 10 and the heat sink 40 are combined. As shown in the figure, the jet flow generating device 10 and the heat sink 40 are combined so that the partition plates 25 of the jet flow generating device 10 are engaged between the fins 41 of the heat sink. The heat sink 40 is formed so that each flow path (each discharge port) of the nozzle 2 corresponds to each notch 43 a and 43 b of the heat sink 40. The heat sink 40 can take in the air discharged from each flow path of the nozzle 2 by using the notches 43a and 43b as ventilation portions. The heat sink 40 is installed so as to receive heat from a heating element such as an IC (not shown). As a result, the jet flow generating device 10 and the heat sink 40 function as a cooling device for the heating element.

  Next, the operation of the jet flow generating device 10 configured as described above will be described.

  When, for example, a sinusoidal AC voltage is applied to the drive device 35, the diaphragm 33 performs sinusoidal vibration. Thereby, the volume in the chambers 3 and 4 increases or decreases. As the volumes of the chambers 3 and 4 change, the pressures in the chambers 3 and 4 alternately increase and decrease, and accordingly, the upper flow path 21 and the flow path 22, and the lower flow path 23 and the flow path 24 respectively. And alternately discharged as a pulsating flow.

  And when air is discharged from the flow path 21 and the flow path 22 or from the flow path 23 and the flow path 24, the air pressure around the casing 1 and the nozzle 2 decreases, so that the surrounding air is A synthetic jet is generated by being caught in the air discharged from the flow path. When this synthetic jet is blown to the heating element and the high temperature part, the heating element and the high temperature part can be cooled. Examples of the heating element and the high heat part include electronic parts such as an IC, a coil, and a resistor in addition to the heat sink 40. However, the heating element and the high temperature part are not limited to these and may be anything that generates heat.

  In addition, when air is discharged from the flow path 21 and the flow path 22 or the flow path 23 and the flow path 24, noise due to airflow noise is generated independently from each flow path. However, since each sound wave generated in each flow path is a sound wave having an opposite phase, the sound waves are weakened. Thereby, noise can be suppressed to some extent, and noise reduction can be achieved.

  When the jet flow generating device 10 and the heat sink 40 are combined, as described above, the heat sink 40 can take in the synthetic jet through the 43 notches a and 43b. As a result, a larger amount of gas than the amount of gas discharged from each flow path is discharged from the outlet of the heat sink 40. Thereby, it is possible to effectively dissipate the heat generated from the heating element while suppressing the generation volume of the jet flow generation device 10 and suppressing the generation of noise as much as possible.

  By the way, in the case where the jet flow generating device 10 and the heat sink 40 are combined, when each discharge port is provided on the nozzle 2 of the jet flow generating device 10 on a plane perpendicular to the discharge direction, each notch of the nozzle and the heat sink 40 is provided. If there is not enough space between 43a and 43b, it will be difficult to entrain the outside air by the discharged air, and it may not be possible to effectively generate a synthetic jet. However, the jet flow generating apparatus 10 in the present embodiment solves this problem by forming each flow path so that each discharge port is provided on the first slope and the second slope.

  FIG. 6 is a diagram comparing the flow of discharged air when each discharge port of each flow path of the nozzle 2 is provided on a slope and when it is provided on a surface perpendicular to the discharge direction. FIG. 6A shows a flow velocity vector in the vicinity of the central section of the nozzle when the jet generating device having a nozzle having each ejection port provided on a vertical surface and the heat sink 40 are combined to operate the jet generating device. FIG. FIG. 4B is a diagram showing a flow velocity vector in the vicinity of the central section of the nozzle 2 when the jet flow generating device 10 according to this embodiment is operated. In both figures, it is assumed that air is discharged from the upper chamber through the upper two flow paths and air is sucked into the lower chamber through the lower two flow paths.

  As shown in FIG. 5A, when each discharge port is provided on the vertical surface, the distance between the upper two discharge ports and the heat sink 40 is close enough in the circled portion of FIG. Since there is no space, even if air is discharged from the above two flow paths, the outside air is less involved by the discharged air, and the space in which the air is taken in from each notch 43a Therefore, it is difficult to efficiently generate a synthetic jet and take it into the heat sink 40. In other words, the nozzle itself is an obstacle to the generation and intake of a synthetic jet due to the entrainment of outside air.

  On the other hand, as shown in FIG. 5B, when the nozzle 2 in the present embodiment is used, the upper flow path 21 and the flow path 22 are formed on the inclined surface 20a. A sufficient space is created between the passage 21 (discharge port 21a) and each notch 43a of the heat sink 40, and it is easier to entrain outside air than in the case of FIG. Thereby, a synthetic jet can be more effectively generated by the flow of air discharged from each discharge port, and the heat sink 40 can take in more air by the synthetic jet. Specifically, as a result of simulation by the present inventor, according to the nozzle 2 in the present embodiment, the amount of air taken into the heat sink 40 is larger than that of a nozzle having a discharge port on a vertical surface as shown in FIG. It has been found that the flow rate can be increased by up to about 15%. It should be noted that even when air is discharged from the flow path 23 and the flow path 24 below the nozzle 2, it is naturally possible to take in more air through the notch 43 b of the heat sink 40.

  As a result, since it becomes possible to increase the flow rate of air discharged from the outlet of the heat sink 40, it is possible to reduce the thermal resistance without increasing the airflow noise that is almost determined by the maximum flow velocity of the air discharged from each flow path. Can do.

  Further, regarding the intake operation from each flow path, in the nozzle in which each flow path is provided on the vertical surface as shown in FIG. 6A, there is no sufficient space between each flow path and the heat sink 40. May not be able to inhale air efficiently. However, in the nozzle 2 in this embodiment, this problem is also solved by forming each flow path having each flow path on the first slope and the second slope.

  FIG. 7 is a diagram comparing the flow of air sucked from the nozzle 2 when each discharge port of each flow path of the nozzle 2 is provided on a slope and when provided on a surface perpendicular to the discharge direction. It is. FIG. 6A shows a flow velocity vector in the vicinity of the central section of the nozzle when the jet generating device having a nozzle having each ejection port provided on a vertical surface and the heat sink 40 are combined to operate the jet generating device. FIG. FIG. 4B is a diagram showing a flow velocity vector in the vicinity of the central section of the nozzle 2 when the jet flow generating device 10 according to this embodiment is operated. In both figures, it is assumed that air is discharged from the lower chamber through the lower two flow paths, and the air is sucked into the upper chamber through the upper two flow paths.

  As shown in FIG. 6A, when the discharge ports are provided on the vertical surface, the distance between the upper two discharge ports and the heat sink 40 is close in the circled portion of FIG. Since there is not enough space around the outlet, the upper two outlets are not able to inhale much of the outside air when air is discharged from the lower two outlets. The air discharged from the outlet has been pulled back. Of the two upper discharge ports, the air discharged from the air discharged by the lower discharge port is also pulled back by the upper discharge port, and each discharge port cannot perform an intake operation independently. In this case, since air that should originally be taken into the heat sink 40 is not taken in, the flow rate of the air discharged from the heat sink 40 is also reduced.

  On the other hand, as shown in FIG. 6B, when each discharge port is provided on the inclined surface 20a, each channel, particularly the channel 21 and the notch 43a of the heat sink 40, in the part surrounded by a circle in FIG. A sufficient space is created between the two discharge ports 21a and 22a, so that the air discharged from the two lower discharge ports 23a and 24a is less pulled back and the outside of the periphery of the discharge ports 21a and 22a. The air is inhaled efficiently. Moreover, since the positions of the discharge port 21a and the discharge port 22a are shifted in the discharge direction, each discharge port can perform an intake operation independently. As a result, a synthetic jet can be efficiently generated and more air can be taken into the heat sink 40. Of course, even when air is discharged from the upper discharge port 21a and the discharge port 22a and air is sucked from the lower discharge port 23a and the discharge port 24a, the discharge port 23a and the discharge port 24a can also efficiently suck in outside air. As a result, a large amount of air can be taken into the heat sink 40.

  Moreover, in this embodiment, each discharge port itself has an inclination by providing each discharge port in the slope 20a and the slope 20b. Thereby, the direction of the flow of the air discharged from each discharge port is changed, and the width of the flow is widened. This is particularly effective when combined with a heat sink having a large loading area. FIG. 8 is a perspective view showing the heat sink 50 having a large loading area, and FIG. 9 is a perspective view showing one of the fins 51 constituting the heat sink 50 of FIG.

  As shown in these drawings, the heat sink 50 is configured by bending both end portions 52a and 52b of the fin 51 in the same direction and arranging them in parallel, like the heat sink 40 shown in FIG. Each fin 51 is provided with a circular through hole 54 for inserting a heat pipe (not shown). The heat pipe is a heat source generated by capillarity in the pipe by putting a refrigerant such as pure water in the pipe and cooling the liquefied vapor flow heated by a heat source such as an IC (not shown) by the fins 51 of the heat sink 50. To reflux. By using the heat pipe, the fin 51 can be separated from the heat source, and the thickness of the entire electronic device can be reduced like a notebook computer. The heat pipe is formed of, for example, a copper-based alloy or an aluminum-based alloy having excellent thermal conductivity.

  FIG. 10 is a diagram illustrating a state in which a simulation is performed in which air is discharged from the jet generating device 10 by combining the heat sink 50 having a large loading area and the four jet generating devices 10. FIG. 6A shows the flow velocity in the vicinity of the central section of the nozzle when the jet generating device is operated by combining four jet generating devices having nozzles each having a discharge port provided on a vertical surface and the heat sink 50. It is the figure which showed the vector. FIG. 5B is a diagram showing flow velocity vectors in the vicinity of the central cross section of the nozzle 2 when the four jet flow generating devices 10 according to this embodiment are operated.

  Comparing the circled portion A in FIG. 5A with the circled portion B in FIG. 4B, the width of the jet flow is greater when air is discharged from the nozzle 2 in this embodiment. It can be seen that is spreading. Therefore, by providing each flow path so that each discharge port is formed on the slope as in this embodiment, the entire fin of the heat sink having a large loading area such as the heat sink 50 can be efficiently used for heat dissipation. . Specifically, as a result of the simulations of the present inventors, when air is discharged from the nozzle 2 in FIG. 5B, the heat sink 50 is compared with the case where air is discharged from the nozzle in FIG. It has been found that the flow rate of the air discharged from the outlet increases by about 20% at the maximum.

(Second Embodiment)
Next, a second embodiment of the present invention will be described. In the first embodiment, the inclined surface 20a is provided on the upper surface of the nozzle 2, the inclined surface 20b is provided on the lower surface, and each flow path having two discharge ports is formed on each of the inclined surface 20a and the inclined surface 20b. In this embodiment, a step portion is provided instead of the slope 20a and the slope 20b, and each flow path is provided in the step portion. In the present embodiment, parts having the same configurations and functions as those in the first embodiment are denoted by the same reference numerals, and description thereof is omitted or simplified.

  FIG. 11 is a view showing the appearance of a jet flow generating apparatus having a nozzle in the present embodiment, and FIG. 12 is a cross-sectional view of the jet flow generating apparatus 100 shown in FIG. As shown in both drawings, the jet flow generating device 100 includes a housing 1, a nozzle 12 attached to the housing 1, and a vibration actuator 15 disposed in the housing 1. Since the configurations and functions of the housing 1 and the vibration actuator 15 are the same as those in the first embodiment, description thereof is omitted.

  The nozzle main body 120 of the nozzle 12 in the present embodiment is attached to the opening 1a on the front surface of the housing 1 in the same manner as the nozzle 2 in the first embodiment. A step portion 120a is provided on the upper surface of the nozzle body 120, and a step portion 120b is provided below the step portion 120a. A stepped portion 120c is provided on the lower surface of the nozzle body 120, and a stepped portion 120d is provided above the stepped portion 120c. That is, in the stepped portion 120a, the stepped portion 120b, the stepped portion 120c, and the stepped portion 120d, the distance in the Z-axis direction between the upper surface and the lower surface of the nozzle body 120 is gradually decreased toward the Y-axis direction in the same figure. It is formed to become.

  A discharge port 121a is provided in the stepped portion 120a on the upper surface, and a discharge port 122a is provided in the stepped portion 120b. Inside the nozzle body 120, air that communicates the discharge ports 121a and 122a and the chamber 3 respectively. A channel 121 and a channel 122 are provided.

  Similarly, a discharge port 123a is provided in the stepped portion 120c on the lower surface, and a discharge port 124a is provided in the stepped portion 120d. The discharge ports 123a and 124a and the chamber 4 communicate with each other inside the nozzle body 120. An air channel 123 and a channel 124 are provided.

  The flow path 121, the flow path 122, the flow path 123, and the flow path 124 are connected to the outside from the chambers 3 and 4 through the respective outlets, as indicated by solid line arrows in FIG. 12, as in the first embodiment. Air is discharged, and as indicated by broken arrows, outside air can be sucked into the chambers 3 and 4 through the discharge ports.

  The length of the channel 121 and the length of the channel 123 are substantially the same. The lengths of the flow path 122 and the flow path 124 are substantially the same, and are provided in the stepped portion 120b and the stepped portion 120d having different heights from the stepped portion 120a and the stepped portion 120c, respectively. And the length of the flow path 123 is longer. Although the diameter of each flow path is substantially the same, it may be formed so that it may differ by the flow path 121 and the flow path 122, and by the flow path 123 and the flow path 124.

  Further, as in the first embodiment, the end of the nozzle body 120 in the air discharge direction (Y-axis direction in the figure) is a partition for partitioning the flow of air discharged or sucked from the respective flow paths. A plate 125 is provided.

  Next, operation | movement of the jet flow generator 100 in this embodiment is demonstrated. Since the operations of the vibration actuator 15 and the like inside the housing 1 are the same as those in the first embodiment, description thereof is omitted.

  FIG. 13 is a diagram showing a flow velocity vector in the vicinity of the central cross section of the nozzle 12 when air is discharged from the nozzle 12 by combining the jet flow generating device 100 in the present embodiment and the heat sink 40 in the first embodiment. . In the drawing, air is discharged from the chamber 3 through the upper flow path 121 and the flow path 122, and air is sucked into the chamber 4 through the lower flow path 123 and the flow path 124. To do.

  As shown in the figure, when the nozzle 12 in the present embodiment is used, the flow path 121 and the flow path 122 are formed in the stepped portion 120a and the stepped portion 120b, respectively, and are therefore circled in FIG. In the same manner as in the first embodiment, a sufficient space is created between each flow path, in particular, the flow path 121 (discharge port 121a) and each notch 43a of the heat sink 40, and it is easy to entrain outside air. . Thereby, it becomes possible to increase the flow rate of the air taken into the heat sink 40 and the air discharged from the outlet of the heat sink 40. Even when air is discharged from the flow path 123 and the flow path 124 below the nozzle 2, it is naturally possible to take in more air through the notch 43 b of the heat sink 40.

  FIG. 14 is a diagram showing a flow velocity vector in the vicinity of the central cross section of the nozzle 12 when the jet generating device 100 according to the present embodiment and the heat sink 40 are combined to suck external air from the nozzle 12. In both figures, it is assumed that air is discharged from the chamber 4 through the flow path 123 and the flow path 124 and is sucked into the chamber 3 through the flow path 121 and the flow path 122.

  As shown in the figure, when the nozzle 12 in the present embodiment is used, the flow path 121 and the flow path 122 are formed in the stepped portion 120a and the stepped portion 120b, respectively, and are therefore circled in FIG. In the portion, as in the first embodiment, a sufficient space is created between each flow path, particularly between the flow path 121 (discharge port 121a) and each notch 43a of the heat sink 40. As a result, the upper two discharge ports 121a and 122a are less likely to pull back the air discharged from the lower two discharge ports 123a and 124a, and the outside air around the discharge ports 121a and 122a is efficiently sucked. ing. In addition, since the positions of the discharge port 121a and the discharge port 122a are shifted in the discharge direction, each discharge port can independently perform an intake operation. As a result, a synthetic jet can be efficiently generated and more air can be taken into the heat sink 40.

  Of course, even when air is discharged from the upper discharge port 121a and the discharge port 122a and air is sucked from the lower discharge port 123a and the discharge port 124a, a large amount of air can be taken into the heat sink 40 in the same manner.

(Third embodiment)
Next, a third embodiment of the present invention will be described. In the first embodiment and the second embodiment, the number of flow paths provided in the nozzle is two each in the upper and lower directions. However, the number is not limited to this number, and may be two or more in the upper and lower directions. However, it may be one each. In the present embodiment, one channel is provided for each of the upper and lower channels. In the present embodiment, parts having the same functions or configurations as those of the above embodiments are denoted by the same reference numerals, and illustration thereof is omitted.

  FIG. 15 is a diagram showing a flow velocity vector in the vicinity of the nozzle central cross section when air is discharged using nozzles each having one upper and lower flow path. As shown in the figure, stepped portions 220a and 220b are provided on the upper surface and the lower surface of the nozzle 112, respectively, a flow path 221 is provided in the stepped portion 220a, and a flow path 222 is provided in the stepped portion 220b. ing. In the figure, air is discharged from the upper flow path 221 and air is sucked from the lower flow path 222. Even in this case, the air discharged from the discharge port 221a of the flow path 221 is taken into the heat sink 40 while efficiently entraining the air around the discharge port 221a.

  FIG. 16 is a diagram showing a flow velocity vector when air is sucked using the nozzle 112 of FIG. In the figure, air is discharged from the lower flow path 222 and air is sucked from the upper flow path 221. As shown in the figure, the discharge port 221a of the upper channel 221 efficiently sucks the ambient air around it, and hardly draws back the air discharged from the discharge port 222a of the lower channel 222. .

  It should be noted that the present invention is not limited to the above-described embodiment, and various modifications can be made without departing from the scope of the present invention.

  The nozzle in each of the above embodiments has a partition plate in the air discharge direction, but the distance between the upper surface and the lower surface of the nozzle body gradually decreases toward the discharge direction in the partition plate as well. Similarly, the width in the vertical direction may be formed so as to gradually decrease in the ejection direction. FIG. 17 is a sectional view showing an example in which the partition plate 225 is integrally formed in the nozzle 112 shown in FIGS. 15 and 16 so that the width in the vertical direction gradually decreases toward the discharge direction. It is. By forming the partition plate 225 in this way, unevenness between the partition plate 225 and the upper surface or the lower surface can be eliminated as much as possible, and the discharged gas can be guided smoothly.

  In the second embodiment, each discharge port is provided on the vertical surface of the stepped portion of the nozzle. However, as shown in FIG. 18, two upper and lower stepped portions (vertical surfaces) 320a and 320b and these You may make it provide the discharge outlet 321a over the horizontal surface 320c which connects these level | step-difference parts. As a result, the width of the flow of the discharged air is further expanded as compared with the case where the discharge port is provided on the inclined surface as in the first embodiment, and it is possible to efficiently dissipate heat sinks having a particularly large loading area. Become.

  A cooling device in which the above-described jet generating device and a heat sink are combined is mounted on an electronic device. FIG. 19 is a perspective view showing a state in which the jet flow generating device 10 and the like shown in the above drawings are mounted on a PC 150 as an electronic device. The synthetic jet supplied from the jet generating device 10 is sprayed on the heat sink 40, and air with heat is discharged from the exhaust port 151 of the PC housing provided behind the heat sink 40.

  In FIG. 19, a laptop PC is taken as an example of the electronic device, but a desktop PC may be used. Not only a PC but also a PDA (Personal Digital Assistance), an electronic dictionary, a camera, a display device, an audio / visual device, a projector, a mobile phone, a game device, a car navigation device, a robot device, and other electrical appliances.

(Fourth embodiment)
Next, a fourth embodiment of the present invention will be described. In addition, in embodiment after this embodiment, the same code | symbol is attached | subjected about the part which becomes the same function or structure as said each embodiment, and abbreviate | omits illustration.

  FIG. 20 is a perspective view showing the appearance of the nozzle in the present embodiment. FIG. 21 is a perspective view showing a state in which the nozzle 412 and the heat sink 40 in FIG. 20 are combined. As shown in these drawings, the nozzle 12 in the second embodiment shown in FIG. 11 and the like has two steps on the upper surface and the lower surface, and has a flow path in each step. In this embodiment, the nozzle 412 has three stepped portions (upper stepped portions 420a to 400c and lower stepped portions 420d to 420f) on the upper surface and the lower surface. The step portion has channels (upper channels 421 to 423 and lower channels 424 to 426).

  In this embodiment, the nozzle 412 is not provided with a partition plate, but may of course be provided with a partition plate. The same applies to the following embodiments.

  FIG. 22 shows a combination of the jet generator 100 having the nozzle 12 (two-stage nozzle) in the second embodiment and the jet generator 100 having the nozzle 412 (three-stage nozzle) in the present embodiment, respectively, with the heat sink 40. It is the figure which showed the result of having performed simulation. In this simulation, the flow rate of the gas flowing through the outlet of the heat sink 40 (hereinafter simply referred to as the outlet flow rate), the maximum flow velocity of the gas discharged from both nozzles, the outlet flow rate per unit flow velocity (outlet flow rate / maximum flow velocity), The difference between the maximum pressure and the minimum pressure in the flow path for one cycle of gas intake and discharge (hereinafter simply referred to as pressure difference) is measured, and the outlet flow rate, maximum flow rate, outlet flow rate per unit flow rate and pressure For each difference, the ratio of the 3-stage nozzle to the 2-stage nozzle was calculated. In this simulation, the flow rate of the gas discharged from the second stage nozzle is set to be the same as the flow rate of the gas discharged from the third stage nozzle.

  From this figure, the outlet flow rate of the heat sink 40 is increased by about 6% by using the nozzle 412 having three steps in the upper and lower steps as in this embodiment, compared to the case in which the step is two steps in the upper and lower portions. I understand that This is thought to be because more space is created between each discharge port and the heat sink 40 by increasing the stepped portion. That is, according to the nozzle 412 of the present embodiment, it is possible to reduce the thermal resistance of the heat sink 40 compared to the two-stage nozzle.

(Fifth embodiment)
Next, a fifth embodiment of the present invention will be described. FIG. 23 is a perspective view showing the appearance of the nozzle in the present embodiment. FIG. 24 is a perspective view showing a state in which the nozzle 512 and the heat sink 40 in FIG. 23 are combined. As shown in these drawings, in this embodiment, compared to the nozzle 12 in the second embodiment, each of the step portions 520a, 520b, 520c, and 520d of the nozzle 512 has an R portion that is cut into a curved surface. 526a, 526b, 526c, and 526d are provided.

  FIG. 25 shows a combination of the jet generating device 100 having the nozzle 12 (without R) in the second embodiment and the jet generating device 100 having the nozzle 512 (with R) in the present embodiment, respectively, with the heat sink 40. It is the figure which showed the simulation result measured about each item of an outlet flow volume, the maximum flow velocity, the outlet flow volume per unit flow velocity, and a pressure difference similarly to the said FIG.

  From this figure, it can be seen that by providing the R portion at the stepped portion as in this embodiment, the outlet flow rate of the heat sink 40 is increased by about 3% compared to the case where the R portion is not provided. This is presumably because the provision of the R portion further creates a space between the heat sink 40 and each discharge port. That is, according to the nozzle 512 of the present embodiment, it is possible to reduce the thermal resistance of the heat sink 40 as compared with the case where the R portion is not provided in the stepped portion.

  FIG. 26 shows a driving device in which the jet generating device 100 having the nozzle 12 (without R) in the second embodiment and the jet generating device having the nozzle 512 (with R) in the present embodiment are combined with the heat sink 40, respectively. It is the figure which showed the simulation result which measured each noise level at the time of driving 35. In this simulation, measurement was performed by changing the amplitude of the diaphragm 33 driven by the driving device 35 in three stages of 3.5 mm, 4 mm, and 4.5 mm. Moreover, in this simulation, in order to see the dispersion | variation in the measurement result by an apparatus, it measured using two different jet flow generators 100 (A and B). The noise was measured from the outlet of the heat sink 40 at a point 15 cm in the y-axis direction and 15 cm in the z-axis direction in FIG.

  As shown in the figure, at any amplitude stage and when any jet generator is used, by using the nozzle 512 having the R portion at the stepped portion as in this embodiment, the R portion is Noise was reduced compared to the case without it, and on average there was an improvement of about 2 dBA. This is considered to be because the air resistance was reduced by providing the R portion. That is, by using the nozzle 512 in the present embodiment, not only the thermal resistance but also noise can be reduced.

(Sixth embodiment)
Next, a sixth embodiment of the present invention will be described. FIG. 27 is a perspective view showing the appearance of the nozzle in the present embodiment. As shown in the figure, in this embodiment, the diameters of the flow paths 621, 622, 623, and 624 are different from those of the nozzle 12 in the second embodiment in the gas discharge direction (y-axis direction in the figure). A taper is provided so as to gradually become smaller toward. In the figure, the taper angle θ is, for example, 0.9 degrees, but is not limited thereto. Further, the diameters of the discharge ports 621a, 622a, 623a, and 624a of the respective flow paths are the same as the diameters of the discharge ports 121a, 122a, 123a, and 124a of the nozzle 12 in the second embodiment, and from the discharge ports. The diameter in each flow path is formed so as to gradually increase in the gas suction direction.

  FIG. 28 shows a combination of the jet generating device 100 having the nozzle 12 (without taper) in the second embodiment and the jet generating device 100 having the nozzle 612 (with taper) in the present embodiment, respectively, with the heat sink 40. It is the figure which showed the simulation result measured about each item of outlet flow volume, the maximum flow velocity, the outlet flow volume per unit flow velocity, and a pressure difference similarly to said FIG.

  From the figure, it can be seen that the pressure difference is reduced by about 18% by providing the flow path with a taper as in this embodiment, compared to the case without the taper. That is, according to the nozzle 612 of the present embodiment, when the vibration actuator 15 is driven, the fluctuation in the pressure in each flow path due to the vibration of the vibration actuator 15 is reduced as compared with the case where the nozzle 612 is not formed in a tapered shape. It becomes possible to reduce the noise in.

  Also, from the figure, by providing a taper on the flow path, the outlet flow rate of the heat sink 40 is reduced by about 1%, but the maximum flow rate is reduced by about 5%, and the outlet flow rate per unit flow rate is increased by about 4%. is doing. Therefore, since the flow velocity can be lowered without reducing the discharge flow rate from the nozzle 612, it is possible to reduce the noise.

(Seventh embodiment)
Next, a seventh embodiment of the present invention will be described. FIG. 29 is a perspective view showing the appearance of the nozzle in the present embodiment. As shown in the figure, in the present embodiment, a plurality of grooves are provided in each of the flow paths 721, 722, 723, and 724 in the gas discharge direction as compared with the nozzle 12 in the second embodiment. Yes. That is, as shown in the enlarged view encircled by a circle in the same figure, each flow path is formed so that the cross-sectional shape in the radial direction of each flow path is a shape in which two pentagons are stacked 180 degrees out of phase. is doing.

  FIG. 30 shows a jet generator 100 having the nozzle 12 (no groove in the flow path) in the second embodiment, and a jet generator 100 having the nozzle 712 (having a groove in the flow path) in the present embodiment. FIG. 24 is a diagram showing a simulation result obtained by measuring each of the items of the outlet flow rate, the maximum flow velocity, the outlet flow rate per unit flow velocity, and the pressure difference in the same manner as FIG.

  From this figure, it can be seen that by providing a groove in the flow channel as in this embodiment, the pressure difference is reduced by about 40% compared to the case where no groove is provided. Therefore, by providing a groove in the flow path, it is possible to reduce noise when driving the vibration actuator 15.

  Also, it can be seen from the figure that the outlet flow rate per unit flow rate is increased by about 12% by providing the groove in the flow path as compared with the case where the groove is not provided. Therefore, since the flow velocity can be lowered without reducing the discharge flow rate from the nozzle 712, it is also possible to reduce noise.

  In addition, when providing a groove | channel in a flow path, you may make it a shape which becomes not only the form from which the cross-sectional shape of a flow path becomes a shape which piled up two pentagons as mentioned above, for example, but a hexagon. In addition, a plurality of triangles may be overlapped with a phase shift, may be a polygon other than that, or a shape where a plurality of polygons are overlapped.

(Eighth embodiment)
Next, an eighth embodiment of the present invention will be described. FIG. 31 is a perspective view showing the appearance of the nozzle in the present embodiment. As shown in the figure, in the present embodiment, as shown in the figure, in the present embodiment, the channels 821, 822, 823, and 824 are tapered in comparison with the nozzle 12 in the second embodiment. In addition, R portions 826a to 826d are provided at the respective step portions, and the discharge ports 821a, 822b, 823c, and 824d are formed in an R shape. That is, in this embodiment, the nozzle 512 in the fifth embodiment and the nozzle 612 in the sixth embodiment are combined, and each discharge port is provided with an R shape.

  FIG. 32 shows a jet flow generating apparatus 100 having a nozzle 12 (taper / step difference R / no discharge port R) in the second embodiment and a nozzle 612 (taper / step difference R / discharge port R present) in the present embodiment. FIG. 6 is a diagram showing simulation results obtained by measuring each of the outlet flow rate, the maximum flow velocity, the outlet flow rate per unit flow velocity, and the pressure difference in the same manner as in FIG. It is.

  From the figure, it can be seen that by providing the taper, the stepped portion R and the discharge port R, the pressure difference is reduced by about 16% compared to the case where each is not provided. This is an effect obtained by providing each channel with a taper. As a result, it is possible to reduce noise when the vibration actuator 15 is driven.

  Also, from the figure, by providing each of the taper, stepped portion R and discharge port R, the heat sink outlet flow rate is increased by about 2% and the maximum flow velocity is reduced by about 8% compared to the case without each. It can be seen that the outlet flow rate per unit flow rate is increased by about 11%. The increase in the outlet flow rate is an effect of providing a taper for each flow path. Thereby, the thermal resistance of the heat sink 40 can be further reduced, and noise during driving of the vibration actuator 15 can be reduced.

  That is, according to the present embodiment, the effect of providing the taper in the flow path and the effect of providing R at the stepped portion or the discharge port can be obtained without contradicting each other. In addition, it is of course possible to configure the nozzle by arbitrarily combining the taper, the stepped portions or the R portions of the respective discharge ports, and the stepped portions of the three upper and lower steps in the fourth embodiment described above. By this, the above-mentioned effect can be obtained.

(Ninth embodiment)
Next, a ninth embodiment of the present invention will be described. FIG. 33 is a perspective view showing a state in which the nozzle 912 and the heat sink 40 in this embodiment are combined. 34A is a view of the nozzle 912 and the heat sink 40 of FIG. 33 taken from the outlet side of the heat sink 40 (in the direction of arrow A in FIG. 33), and FIG. 34B is a view of the nozzle 912 and the heat sink 40 of FIG. It is the figure which caught the heat sink 40 from the nozzle 912 side (arrow B direction of FIG. 33), and FIG.34 (c) is a perspective view of the nozzle 912 alone.

  As shown in the figure, the nozzle 912 in the present embodiment is provided with one channel on each of the upper surface and the lower surface, like the nozzle 112 shown in FIG. 15 and the like in the third embodiment. However, as in the above embodiments, each flow path is not made to correspond to one gap 44 of each fin 41 of the heat sink 40, but the diameter of each flow path is increased so that the two gaps of each fin 41 are increased. 44 in that it corresponds to 44. That is, in the present embodiment, the gas discharged from one discharge port 921a and 922a is composed of two fins 41 that are arranged so as to divide each discharge port into approximately two and the fins 41 adjacent to the two. It will be taken into the heat sink 40 through the gap. The number of flow paths of the nozzle 912 in the present embodiment is ½ of the number of flow paths of the nozzle 112 in the third embodiment, but the sum of the opening areas of the discharge ports 921a and 922a of the nozzle 912 is The nozzle 112 is designed to be equal to the sum of the opening areas of the discharge ports 221a and 222a.

  FIG. 35 shows a jet flow generation device 100 having the nozzle 112 (one discharge port corresponds to one gap of each fin 41) in the third embodiment, and a nozzle 912 (two fins 41 of each fin 41) in this embodiment. It is the figure which showed the simulation result which measured the power consumption and thermal resistance at the time of driving the jet generator 100 which has one discharge port corresponding to a clearance | gap and combining with the heat sink 40, respectively. The gas discharge flow rates from both nozzles were set to be equal. The figure (a) has shown the relationship between the amplitude of each diaphragm, and power consumption, and the figure (b) has shown the relationship between power consumption and thermal resistance. In each drawing, the nozzle 912 of the present embodiment is referred to as a “large nozzle”, and the nozzle 112 of the third embodiment is referred to as a “normal nozzle”.

  From FIG. 6A, by making the gap between the ejection port and each fin 41 correspond 1: 2, the power consumption is about 0.6 times regardless of the amplitude, compared to 1: 1 correspondence. I understand that. Further, from FIG. 5B, it is understood that when the power consumption is the same, the thermal resistance of the nozzle 912 (large hole nozzle) of the present embodiment is reduced by about 0.1 k / W. That is, according to the present embodiment, by increasing the diameter of each flow path to reduce flow path resistance and pressure loss, lower thermal resistance is achieved with equivalent power consumption, and low with equivalent thermal resistance. Power consumption can be realized.

(10th Embodiment)
Next, a tenth embodiment of the present invention will be described. FIG. 36 is a cross-sectional view of the jet flow generating device in the present embodiment.

  As shown in the figure, the jet flow generating device 200 according to the present embodiment sucks gas into the chamber 3 and the chamber 4 from the outside to the back surface (surface opposite to the nozzle 2) of the housing 1. For example, a cylindrical intake port 6 and an intake port 8 are provided. In each intake port 6 and 8, there is a check for preventing the gas sucked into the chambers 3 and 4 from the intake ports 6 and 8 from flowing back to the outside of the chambers 3 and 4 by driving the vibration actuator 15. Valves 7 and 9 are provided, respectively.

  FIG. 37 is an enlarged view of the vicinity of the intake ports 6 and 8 of the jet flow generating device 200 of FIG. As shown in FIG. 5A, the check valves 7 and 9 in the intake ports 6 and 8 are connected to the valve body 7a and the valve body 7a, for example, and the valve body 7a. Coil springs 7b and 9b for energizing the intake ports 6 and 8 in a direction (arrow A1 direction in the figure).

  When the pressure in the chamber 4 increases and the pressure in the chamber 3 decreases due to the driving of the vibration actuator 15, gas is sucked into the chamber 3 from the flow paths 21 and 22 above the nozzle 2, and As shown in FIG. 5B, the valve element 7a moves in the direction of the arrow A2 against the urging force, so that the gas enters the chamber 3 through the intake port 6 as shown by the arrow B in FIG. Is inhaled. At this time, since the intake port 8 is blocked by the valve body 9a of the check valve 9, gas does not flow out from the chamber 4 where the pressure has increased through the intake port 8, and the flow in the lower portion of the nozzle 2 is reduced. Gas is discharged only from the paths 23 and 24.

  Although not shown, conversely, when the pressure in the chamber 3 increases and the pressure in the chamber 4 decreases, gas is sucked into the chamber 4 from the flow paths 23 and 24 and also from the intake port 8. Is inhaled. At this time, since the intake port 6 is blocked by the valve body 7a of the check valve 7, gas does not flow out from the chamber 3 where the pressure has increased through the intake port 6, and only the flow paths 21 and 22 are present. The gas is discharged from.

  FIG. 38 is a graph showing the results of a simulation measuring the relationship between the intake rate and the increase rate of the outlet flow rate of the heat sink 40 when intake is performed from each of the intake ports. In the simulation, for example, a mechanism that inhibits gas suction, such as a check valve, is provided in each flow path of the nozzle 2, for example, and the vibration actuator 15 is driven, so The intake rate was adjusted. Further, the flow rate of the gas discharged from each flow path of the nozzle 2 was adjusted so as to be always constant.

  As shown in the figure, when the intake from the nozzle 2 is completely stopped and the intake is performed from the 100% intake port 6 or 8, the outlet flow rate of the heat sink 40 is compared to the case where the intake from the nozzle 2 is 100%. Increased by about 42%. Further, when a part of the intake air is taken from the intake port 6 or 8, for example, even when the intake rate is 25%, it has been found that the outlet flow rate of the heat sink 40 increases by 16%.

  That is, even if not all the intake air is performed from other than the nozzle 2, by performing at least a part of the intake air from the intake port 6 or 8 as in the present embodiment, the return of the gas discharged from each discharge port is reduced. The outlet flow rate of the heat sink 40 can be increased, and the thermal resistance of the heat sink 40 can be reduced.

  Further, when the jet flow generator 200 is mounted on an electronic device such as the PC 150 shown in FIG. 19, the intake ports 6 and 8 are provided at a position where the outside air is directly sucked from the outside of the electronic device. It may be. Thus, the temperature of the air flowing through the gaps of the fins 41 of the heat sink 40 can be lowered compared to the case where the warmed air inside the electronic device is sucked and discharged from the nozzle 2, so that the temperature of the heating element is further increased. It can be reduced.

  Furthermore, the intake ports 6 and 8 may be installed in the vicinity of a heating element that is not in direct thermal contact with the heat sink 40, for example. This makes it possible to create a gas flow around the heating element that is not in direct thermal contact with the heat sink 40 and to lower the temperature of the heating element. This is effective, for example, as a countermeasure for a place (heat spot) where the temperature locally increases on the surface of the casing of the electronic device.

(Eleventh embodiment)
Next, an eleventh embodiment of the present invention will be described. FIG. 39 is an enlarged view of the vicinity of the intake ports 6 and 8 of the jet flow generating device 300 according to the present embodiment.

  As shown in the figure, in the present embodiment, the interior of each intake port 6 and 8 is greater than that of each intake port 6 and 8 of the jet flow generating device 200 shown in FIGS. 36 and 37 in the tenth embodiment. In addition, for example, two disc-like elastic bodies 107a and 107b and 109a and 109b are provided as check valves. As shown in FIG. 6A, each elastic body has one end fixed in the intake ports 6 and 8, and the other end in the direction of arrow A (each chamber side). It is possible to curve so as to open.

  When the pressure in the chamber 4 increases and the pressure in the chamber 3 decreases as the vibration actuator 15 is driven, gas is sucked into the chamber 3 from the flow paths 21 and 22 above the nozzle 2. As shown in FIG. 7B, the elastic bodies 107a and 107b of the check valve 7 are bent in the direction of the arrow A, so that the check valve 7 enters the chamber 3 through the intake port 6 as shown in the arrow B of FIG. Gas is inhaled. At this time, since the intake port 8 is blocked by the elastic bodies 109a and 109b, gas does not flow out from the chamber 4 where the pressure has increased through the intake port 8, and the flow path 23 and the lower portion of the nozzle 2 and Gas is discharged only from 24.

  Although not shown, when the pressure in the chamber 3 increases and the pressure in the chamber 4 decreases, gas is sucked into the chamber 4 from the flow paths 23 and 24 as in the tenth embodiment. At the same time, gas is sucked from the intake port 8. At this time, since the intake port 6 is blocked by the elastic bodies 107a and 107b, the gas does not flow out from the chamber 3 where the pressure has increased through the intake port 6, but the gas is only from the flow paths 21 and 22. Discharged.

  With the above configuration and operation, in the present embodiment as well, the outlet flow rate of the heat sink 40 can be increased and the thermal resistance of the heat sink 40 can be reduced as in the tenth embodiment. Further, the temperature of the heating element can be lowered by providing the intake ports 6 and 8 at positions where the outside air is directly sucked from the outside of the electronic device. Further, by providing the intake ports 6 and 8 in the vicinity of the heating element, the temperature of the heating element can be lowered.

It is the perspective view which showed the external appearance of the jet flow generator which has a nozzle in 1st Embodiment of this invention. It is sectional drawing of the jet flow generator of FIG. It is a perspective view of the heat sink 40 in 1st Embodiment. FIG. 4 is a perspective view of one fin constituting the heat sink 40 of FIG. 3. It is the perspective view which showed a mode that the jet flow generator 10 and the heat sink 40 were combined in 1st Embodiment. In 1st Embodiment, it is the figure which compared the flow of the discharged air by the case where each discharge port of the nozzle 2 is provided in a slope, and the case where it provides in a vertical surface. In 1st Embodiment, it is the figure which compared the flow of the air suck | inhaled from the nozzle 2 by the case where each discharge port of the nozzle 2 is provided in the inclined surface, and the case where it provides in the vertical surface. In 1st Embodiment, it is the perspective view which showed the heat sink 50 with a large loading area. It is the perspective view which showed one sheet among each fin 51 which comprises the heat sink 50 of FIG. In 1st Embodiment, it is the figure which showed a mode that the simulation which discharges air from the jet flow generator 10 was performed combining the heat sink 50 with a large loading area, and the four jet flow generators 10. FIG. It is the perspective view which showed the external appearance of the jet flow generator which has a nozzle in 2nd Embodiment of this invention. It is sectional drawing of the jet flow generator of FIG. It is the figure which showed the flow velocity vector in the nozzle 12 center vicinity vicinity at the time of discharging air from the nozzle 12 in 2nd Embodiment. It is the figure which showed the flow velocity vector in nozzle 12 vicinity near the case where external air is suck | inhaled from the nozzle 12 combining the jet generator 100 and heat sink 40 in 2nd Embodiment. In other embodiment of this invention, it is the figure which showed the flow velocity vector at the time of discharging air using the nozzle which provided the flow path one each up and down. It is the figure which showed the flow velocity vector in the case of inhaling air using the nozzle 112 of FIG. FIG. 17 is a cross-sectional view showing an example in which a partition plate 225 is integrally formed in the nozzle 112 shown in FIGS. 15 and 16 so that the width in the vertical direction gradually decreases in the discharge direction. It is the figure which showed the discharge outlet provided in the level | step-difference part in other embodiment. It is a perspective view which shows the state by which the jet flow generator 10 grade | etc., Was mounted in PC150 as an electronic device. It is the perspective view which showed the external appearance of the nozzle in the 4th Embodiment of this invention. It is the perspective view which showed a mode that the nozzle 412 and the heat sink 40 of FIG. 20 were combined. It is the figure which showed the simulation result regarding the performance of the nozzle 412 in 4th Embodiment. It is the perspective view which showed the external appearance of the nozzle in the 5th Embodiment of this invention. It is the perspective view which showed a mode that the nozzle 512 and the heat sink 40 of FIG. 23 were combined. It is the figure which showed the simulation result regarding the performance of the nozzle 512 in the 5th Embodiment of this invention. It is the figure which showed the other simulation result regarding the performance of the nozzle 512 in the 5th Embodiment of this invention. It is the perspective view which showed the external appearance of the nozzle in the 6th Embodiment of this invention. It is the figure which showed the simulation result regarding the performance of the nozzle 712 in 6th Embodiment of this invention. It is the perspective view which showed the external appearance of the nozzle in the 7th Embodiment of this invention. It is the figure which showed the simulation result regarding the performance of the nozzle 712 in the 7th Embodiment of this invention. It is the perspective view which showed the external appearance of the nozzle in the 8th Embodiment of this invention. It is the figure which showed the simulation result regarding the performance of the nozzle 812 in the 8th Embodiment of this invention. It is the figure which showed a mode that the nozzle 912 and the heat sink 40 in the 9th Embodiment of this invention were combined. It is the figure which showed a mode that the nozzle 912 and heat sink 40 of FIG. 33 were caught from another angle. It is the figure which showed the simulation result regarding the performance of the nozzle 912 in the 9th Embodiment of this invention. It is sectional drawing of the jet flow generator 200 in the 10th Embodiment of this invention. FIG. 37 is an enlarged view of the vicinity of the intake ports 6 and 8 of the jet flow generating device 200 of FIG. 36. It is the graph which showed the relationship between the intake rate at the time of inhaling from an inlet port and the increase rate of an exit flow volume in the 10th Embodiment of this invention. It is an enlarged view near the inlet ports 6 and 8 of the jet generator 300 in the eleventh embodiment of the present invention.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 ... Case 2, 12, 112, 412, 512, 612, 712, 812, 912 ... Nozzle 3, 4 ... Chamber 5 ... Drive signal generator 6, 8 ... Inlet port 7, 9 ... Check valve 7a, 9a ... Valve 7b, 9b ... Coil spring 10, 100, 200 ... Jet generator 15 ... Vibration actuator 16 ... Yoke 17 ... Magnet 18 ... Coil 19 ... Coil bobbin 20, 120 ... Nozzle body 20a, 20b ... Slope 21-24, 121- 124, 221, 222, 321, 421 to 426, 521 to 524, 621 to 624, 721 to 724, 821 to 824, 921 to 924... Flow path 21 a to 24 a, 121 a to 124 a, 221 a, 222 a, 321 a, 421 a to 426a, 521a to 524a, 621a to 624a, 721a to 724a, 821a to 824 , 921a to 924a ... discharge ports 25, 125, 225 ... partition plate 33 ... vibration plate 34 ... yoke 35 ... drive device 36 ... elastic support member 40, 50 ... heat sink 41, 51 ... fins 43a, 43b ... notch 44 ... gap 107a, 107b, 109a, 109b ... elastic bodies 120a to 120d, 220a, 220b, 320a, 320b, 420a to 420f, 520a to 520d, 620a to 620d, 720a to 720d, 820a to 820d, 920a to 920d ... step portion 150 ... PC
320c ... Horizontal plane 526a-526d, 826a-826d ... R part

Claims (18)

A housing having an opening and containing a gas; a vibrating body provided in the housing so as to vibrate; a first chamber provided in the housing with the vibrating body interposed therebetween; A nozzle capable of discharging the gas as a pulsating flow by vibration of the vibrating body,
It has an upper surface and a lower surface, is provided so as to cover the opening of the housing, and is formed so that the distance between the upper surface and the lower surface gradually decreases in the gas discharge direction A nozzle body,
A first flow path having a first discharge port on the upper surface of the nozzle body and communicating the first chamber with the outside of the nozzle body;
A nozzle having a second discharge port on the lower surface of the nozzle main body, and a second flow path communicating the second chamber and the outside of the nozzle main body. The nozzle according to claim 1,
A first step formed on the upper surface of the nozzle body;
A second step formed on the lower surface of the nozzle body, and
The first flow path is provided to have the first discharge port in the first step portion,
The nozzle, wherein the second flow path is provided so as to have the second discharge port in the second stepped portion. The nozzle according to claim 1,
A first slope formed on the upper surface of the nozzle body;
A second inclined surface formed on the lower surface of the nozzle body,
The first flow path is provided to have the first discharge port on the first slope,
The second flow path is provided so as to have the second discharge port on the second inclined surface. The nozzle according to claim 2,
The first step portion includes a third step portion provided on the upper surface and a fourth step portion provided at a position lower than the third step portion on the upper surface,
The second stepped portion has a fifth stepped portion provided on the lower surface and a sixth stepped portion provided at a position higher than the fifth stepped portion on the lower surface,
The first flow path includes a third flow path having a third discharge port in the third step portion, and a fourth flow path having a fourth discharge port in the fourth step portion. Have
The second flow path includes a fifth flow path having a fifth discharge port in the fifth step portion and a sixth flow path having a sixth discharge port in the sixth step portion. A nozzle characterized by having. The nozzle according to claim 3,
The first flow path includes a third flow path having a third discharge port on the first slope, and a fourth discharge port at a position lower than the third discharge port on the first slope. A fourth flow path having
The second channel includes a fifth channel having a fifth outlet on the second slope, and a sixth outlet at a position higher than the fifth outlet on the second slope. A sixth flow path having a nozzle. The nozzle according to claim 1,
The nozzle further provided with the partition plate extended so that it might protrude in the edge part of the said discharge direction of the said nozzle main body. The nozzle according to claim 6,
The nozzle, wherein the partition plate is integrally formed from the upper surface and the lower surface, and the thickness in the vertical direction is gradually reduced toward the ejection direction. The nozzle according to claim 2,
The first step portion includes a first vertical plane formed in the vertical direction, a first horizontal plane formed in a horizontal direction from the first vertical plane, and the first horizontal plane. A second vertical surface formed at a position lower than the first vertical surface in the vertical direction;
The second stepped portion includes a third vertical surface formed in the vertical direction, a second horizontal surface continuously formed in the horizontal direction from the third vertical surface, and the second horizontal surface. And a fourth vertical surface formed at a position higher than the third vertical surface in the vertical direction,
The first flow path is provided such that the first discharge port is formed across the first vertical plane, the first horizontal plane, and the second vertical plane,
The second flow path is provided so that the second discharge port is formed across the third vertical plane, the second horizontal plane, and the fourth vertical plane. . The nozzle according to claim 2,
The first step portion includes a third step portion provided on the upper surface, a fourth step portion provided at a position lower than the third step portion on the upper surface, and the upper surface. And a fifth step portion provided at a position lower than the fourth step portion.
The second step portion includes a sixth step portion provided on the lower surface, a seventh step portion provided at a position higher than the sixth step portion on the lower surface, and the lower surface. And an eighth step provided at a position higher than the seventh step.
The first flow path includes a third flow path having a third discharge port in the third step portion, a fourth flow path having a fourth discharge port in the fourth step portion, A fifth flow path having a fifth discharge port in the fifth step portion,
The second flow path includes a sixth flow path having a sixth discharge port in the sixth step portion, a sixth flow path having a seventh discharge port in the seventh step portion, An eighth flow path having an eighth discharge port in the eighth step portion. The nozzle according to claim 2,
The nozzle characterized in that each of the first step portion and the second step portion has an R shape. The nozzle according to claim 1,
The nozzle, wherein each of the first flow path and the second flow path is formed so that the diameter of each flow path gradually decreases toward the discharge direction. The nozzle according to claim 1,
The nozzle, wherein each of the first flow path and the second flow path has a plurality of grooves formed in the discharge direction. The nozzle according to claim 1,
The nozzle characterized in that each of the first discharge port and the second discharge port has an R shape. A jet generating device capable of discharging gas as a pulsating flow,
A housing having an opening and containing the gas inside;
A vibrating body provided in the housing so as to vibrate;
A first chamber and a second chamber respectively provided in the housing with the vibrator interposed therebetween;
Nozzle body which has an upper surface and a lower surface, is provided so as to cover the opening, and is formed so that the distance between the upper surface and the lower surface gradually decreases in the gas discharge direction A first discharge port on the upper surface of the nozzle body, a first flow path communicating the first chamber and the outside of the nozzle body, and a second channel on the lower surface of the nozzle body. A nozzle having a second flow path that communicates between the second chamber and the outside of the nozzle body,
A jet flow generating device comprising: a drive unit that drives the vibrating body to discharge the gas in the casing as a pulsating flow through the first flow path and the second flow path. The jet generator according to claim 14,
The housing has a first air inlet for sucking the gas into the first chamber, and a second air inlet for sucking the gas into the second chamber,
The jet generating device is provided so as to be able to open and close the first intake port, and is provided so as to be able to open and close the first check valve for preventing the backflow of the sucked gas and the second intake port, A jet flow generating apparatus, further comprising a second check valve for preventing a backflow of the sucked gas. A cooling device having a jet generating device capable of discharging gas as a pulsating flow,
A housing having an opening and containing gas inside;
A vibrating body provided in the housing so as to vibrate;
A first chamber and a second chamber respectively provided in the housing with the vibrator interposed therebetween;
Nozzle body which has an upper surface and a lower surface, is provided so as to cover the opening, and is formed so that the distance between the upper surface and the lower surface gradually decreases in the gas discharge direction A first discharge port on the upper surface of the nozzle body, a first flow path communicating the first chamber and the outside of the nozzle body, and a second channel on the lower surface of the nozzle body. A nozzle having a second flow path that communicates between the second chamber and the outside of the nozzle body,
A jet generating device having a drive unit that drives the vibrating body to discharge the gas in the housing as a pulsating flow through the first flow path and the second flow path;
A cooling device, comprising: a heat sink having a ventilation portion capable of taking in the gas from the outside on a side for receiving the gas discharged from the first discharge port or the second discharge port. The cooling device according to claim 16, comprising:
The heat sink has a plurality of fins arranged in parallel so as to form a plurality of the ventilation portions in a first direction orthogonal to the discharge direction,
The first flow path and the second flow path are respectively configured such that gas discharged from one first discharge port and one second discharge port passes through the plurality of ventilation portions, respectively. A cooling device, wherein a plurality of the cooling devices are provided in the first direction. An electronic device having a jet generating device capable of discharging gas as a pulsating flow,
A heating element;
A housing having an opening and containing gas; a vibrating body provided in the housing so as to be capable of vibrating; a first chamber and a first chamber provided in the housing with the vibrating body interposed therebetween; 2 chambers, an upper surface and a lower surface, provided so as to cover the opening, so that the distance between the upper surface and the lower surface gradually decreases in the gas discharge direction. A nozzle body formed, a first flow path having a first discharge port on the upper surface of the nozzle body, and communicating the first chamber with the outside of the nozzle body; and the nozzle body A nozzle having a second discharge port on the lower surface and having a second flow path communicating the second chamber and the outside of the nozzle body;
A jet generating device having a drive unit that drives the vibrating body to discharge the gas in the housing as a pulsating flow through the first flow path and the second flow path;
A heat sink having a ventilation part capable of taking in the gas from the outside on the side receiving the gas discharged from the first discharge port or the second discharge port;
An electronic apparatus comprising: the jet flow generation device; and a second housing capable of holding the heat sink.

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