JP2006063900A - Jet generating device and electronic apparatus - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a jet generating device effectively radiating heat generated from a heat generating body and an electronic apparatus equipped with the same. <P>SOLUTION: The jet generating device 1 includes a first and a second nozzle 3a, 3b, and a first and a second chamber 2a, 2b communicating to the first and the second nozzle 3a, 3b, and includes a casing 2 containing air therein, and a first and a second vibration plate 10a, 10b vibrating with synchronizing to mutually increase volume of the first chamber 2a and mutually decrease volume of the first chamber 2a and arranged to partition an inside of the casing 2 to form the first chamber 2a and the second chamber 2b, and is provided with a vibration mechanism alternately discharging air as pulsation by vibration of the first and the second vibration plate 10a, 10b via the first and the second nozzle 3a, 3b. <P>COPYRIGHT: (C)2006,JPO&NCIPI

Description

  The present invention relates to a jet generating device that generates a jet to cool a heating element such as an electronic component, and an electronic apparatus equipped with the jet generating 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, for example, there is a method in which a heat dissipation fin made of a metal such as aluminum is brought into contact with the IC, and heat from the IC is conducted to the fin to dissipate heat. Also, there is a method of dissipating heat by forcibly removing, for example, warm air in a PC housing by using a fan and introducing ambient low-temperature air around the heating element. Alternatively, there is a method of forcibly removing the warm air around the radiating fin by the fan while using the radiating fin and the fan together to increase the contact area between the heating element and the air with the radiating fin.

  However, in such forced convection of air by the fan, there is a problem that a temperature boundary layer on the surface of the fin occurs on the downstream side of the radiating fin, and heat from the radiating fin cannot be efficiently taken. In order to solve such a problem, for example, it is possible to increase the wind speed of the fan to make the temperature boundary layer thinner. However, increasing the number of rotations of the fan in order to increase the wind speed has a problem in that noise from the bearing portion of the fan or noise due to wind noise caused by the wind from the fan occurs.

As a method of destroying the temperature boundary layer and efficiently releasing the heat from the radiation fins to the air, there is a method using a synthetic jet. This is to cause air movement generated by a reciprocating piston or the like provided in the chamber to be ejected from a hole provided at one end of the chamber. The air ejected from the hole is called a synthetic jet, which promotes air mixing and causes destruction of the temperature boundary layer, and can dissipate heat more efficiently than conventional forced convection by a fan (for example, Patent Document 1). reference.).
US Pat. No. 6,123,145 (FIG. 8 etc.)

  However, in the technique described in Patent Document 1, air vibration due to the reciprocating motion of the piston propagates as a sound wave, and noise due to this sound becomes a problem. In addition, since the amount of heat generated by the recent increase in the clock frequency of ICs is steadily increasing, for example, in order to destroy the temperature boundary layer formed near the heat radiating fins due to the heat generation, You have to send more air towards you. Then, the FIG. Even in a device that vibrates the vibrating membrane and ejects air, such as the device shown in 1A and the like, the amplitude of the vibration must be increased to increase the amount of air ejected. Therefore, when the vibration frequency of the diaphragm is in the audible band, the noise of the diaphragm is also a problem.

  In view of the circumstances as described above, an object of the present invention is to provide a jet generating device capable of effectively dissipating heat generated from a heating element while suppressing generation of noise as much as possible, and an electronic apparatus equipped with the jet generating device. There is to do.

  A jet flow generating apparatus according to the present invention includes first and second openings, and first and second chambers communicating with the first and second openings, respectively, and a housing containing gas therein. A body, and the first chamber and the second chamber are oscillated synchronously to increase the volume of the first chamber and to decrease the volume of the first chamber. And the first and second diaphragms are arranged so as to partition the inside of the housing, and the first and second openings are opened by vibrations of the first and second diaphragms. And a vibration mechanism for alternately discharging the gas as a pulsating flow.

  In the present invention, the gas is alternately discharged as a pulsating flow through the first and second openings by the vibrations of the first and second diaphragms. Needless to say, the volume of the first chamber is increased or decreased by the action of increasing or decreasing the volume of the first chamber by the first diaphragm or the like. As a result, the frequency of the sound wave generated from each opening is also equalized and weakened in opposite phases, and noise is reduced. Further, in the present invention, since two diaphragms are provided inside one housing, changes in the volumes of the first chamber and the second chamber can be increased by the vibration of these diaphragms. The amount of gas discharged can be increased. Therefore, the cooling capacity can be improved.

  In the present invention, the first diaphragm and the second diaphragm may be arranged at a relatively angle, or arranged in a plane (arranged in a plane substantially perpendicular to the vibration direction). You may be made to do. For the first diaphragm, for example, a diaphragm that vibrates by electromagnetic driving with a coil or a permanent magnet attached thereto is used. In this case, a permanent magnet may be arranged in the casing so as to face the coil. The driving is not limited to electromagnetic driving, and may be performed using electrostatic action or piezoelectric action. The same applies to the second diaphragm. Alternatively, the vibration mechanism may include, for example, a rod connected to the diaphragm and a drive unit that linearly drives the rod. In this case, the drive unit is driven by electromagnetic drive, electrostatic drive, or piezoelectric drive. Examples of the gas include air, but other gases may be used. The same applies hereinafter.

  According to one aspect of the present invention, the first and second diaphragms vibrate in opposite directions. Thereby, for example, the vibration of the first diaphragm transmitted to the casing and the vibration of the second diaphragm transmitted to the casing can be canceled to suppress the generation of noise. . It is desirable to increase the gas discharge rate by increasing the amplitude and area of the first diaphragm and the second diaphragm. In that case, the vibration is caused to the jet flow generator by the vibration of the diaphragm. The working force (vibration force) will also increase. In the present invention, the forces can be canceled by vibrations in opposite directions. The excitation force can be expressed by F = −mrω2sinωt. m is the mass of the diaphragm, r is the amplitude, and ω is the frequency. In the present invention, the surfaces substantially perpendicular to the vibration direction of the first and second diaphragms may face each other or may not face each other. In particular, if the surfaces are made to face each other, the discharge amount can be increased in the same manner as the installation area of the jet generating device when one diaphragm is provided. That is, the cooling capacity can be increased while achieving space saving.

  According to an aspect of the present invention, the jet flow generating device integrally supports the first diaphragm and the second diaphragm, and forms the first and second chambers. A partition member for partitioning the inside of the housing is further provided. In the present invention, the vibrations of the first and second diaphragms are opposite to each other, and the inside of the housing is partitioned by a partition member that integrally supports these diaphragms, so that each chamber is formed. The space inside the housing can be used effectively. As a result, the housing can be downsized.

  According to an aspect of the present invention, the vibration mechanism includes a third diaphragm that vibrates so as to increase or decrease the volume of the first chamber in synchronization with the first diaphragm, and the third diaphragm And a fourth diaphragm that vibrates in opposite directions to the diaphragm and vibrates so as to increase or decrease the volume of the first chamber in synchronization with the second diaphragm. Thus, the third diaphragm in addition to the first diaphragm further changes the volume of the first chamber, and the fourth diaphragm in addition to the second diaphragm further increases the volume of the second chamber. By changing this, the change in the volume of each chamber is further increased, and the amount of gas discharged can be increased. As described above, the first diaphragm and the third diaphragm may face each other or may not face each other. The same applies to the relative arrangement of the second diaphragm and the fourth diaphragm.

  According to one aspect of the present invention, the jet flow generating device integrally supports the first, second, third, and fourth diaphragms to form the first and second chambers. A partition member for partitioning the inside of the housing is further provided. In the present invention, the vibrations of the first and second diaphragms are opposite to each other, the vibrations of the third and fourth diaphragms are opposite to each other, and these four diaphragms are integrally supported. Since the inside of the housing is partitioned by the partitioning member, the space inside the housing for forming each chamber can be used effectively. Thereby, a cooling capacity improves.

  According to an aspect of the present invention, the housing is arranged together with the first and second chambers in the vibration direction of the third and fourth openings and the first and second diaphragms, Third and fourth chambers communicating with the third and fourth openings, respectively, and the vibration mechanism vibrates in synchronization with the second diaphragm in opposite directions, and the second vibration A third diaphragm arranged to form the third chamber with the plate and to form the fourth chamber with the housing, and the second diaphragm The gas is alternately discharged as a pulsating flow through the third and fourth openings by the vibration of the third diaphragm. Thereby, in addition to the weakening of sound waves when gas is discharged through the first and second openings, the sound waves generated in the third and fourth openings are weakening, so the discharge amount can be reduced while suppressing noise. You can do more. Therefore, the cooling capacity is improved.

  According to another aspect of the present invention, there is provided a jet flow generating apparatus including first, second, third, and fourth openings, a first chamber that communicates with the first and second openings, and the third and second openings. 4, a second chamber communicating with the opening of 4, a housing containing gas therein, a first diaphragm disposed in the first chamber, and a second chamber disposed in the second chamber And a second diaphragm that vibrates in synchronization with the first diaphragm in an opposite direction, and the gas is alternately passed through the first and second openings by the vibration of the first diaphragm. And a vibration mechanism that discharges the gas alternately as a pulsating flow through the third and fourth openings by the vibration of the second diaphragm.

  In the present invention, since the first diaphragm and the second diaphragm vibrate in synchronization with each other in opposite directions, the vibrations of the diaphragms transmitted to the casing are weakened and generated from the casing. Noise can be suppressed. Further, gas is alternately discharged from the first and second openings, that is, sound waves are generated in opposite phases, so that the sound waves weaken each other and noise can be reduced. In addition, since sound waves generated from the third and fourth openings are also weakened in the same manner, noise can be reduced. The first and second diaphragms may or may not face each other. For example, when both diaphragms do not face each other, a moment is generated in the entire housing, but there is no problem if the amplitude of each diaphragm is small and the moment is small.

  An electronic apparatus according to the present invention includes a heating element, first and second openings, and first and second chambers communicating with the first and second openings, respectively, and contains gas therein. The first chamber and the second chamber are oscillated synchronously so as to increase the volume of the first housing and the first chamber and to decrease the volume of the first chamber. The first and second diaphragms are arranged so as to partition the interior of the housing to form the chamber, and the first and second diaphragms are vibrated by vibrations of the first and second diaphragms. And a vibration mechanism for alternately discharging the gas as a pulsating flow toward the heating element through the opening.

  In the present invention, examples of the heating element include an electronic component such as an IC chip and a resistor, a heat radiating fin, and the like. Examples of the electronic device include a computer, a PDA (Personal Digital Assistance), a camera, a display device, an audio device, and other electrical appliances. The same applies hereinafter.

  An electronic device according to another aspect of the present invention includes a heating element, first, second, third, and fourth openings, a first chamber that communicates with the first and second openings, and the first And a second chamber communicating with the third and fourth openings, a housing containing gas therein, a first diaphragm disposed in the first chamber, and the second chamber And a second diaphragm that vibrates in synchronization with the first diaphragm in an opposite direction, and alternately through the first and second openings by the vibration of the first diaphragm. A vibration mechanism for discharging the gas as a pulsating flow, and alternately discharging the gas as a pulsating flow toward the heating element through the third and fourth openings by the vibration of the second diaphragm. It comprises.

  As described above, according to the present invention, it is possible to effectively dissipate heat generated from the heating element while suppressing generation of noise as much as possible.

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

  FIG. 1 is a perspective view showing a jet flow generating apparatus according to the first embodiment of the present invention. FIG. 2 is a cross-sectional view of the jet flow generating device 1 shown in FIG.

  The jet flow generator 1 has a housing 2, and for example, two diaphragms 10 a and 10 b are arranged in the housing 2. The housing 2 is made of a highly rigid material, for example, a metal such as aluminum, but is not limited to a metal and may be a resin. As shown in FIG. 2, the diaphragms 10 a and 10 b have edge members 18 attached to their outer peripheral portions, and are supported integrally by the partition plate 5 via these edge members 18. The partition plate 5 has, for example, a shape in which three side surfaces are opened, and the opened three side surfaces partition the inside of the housing 2 by abutting the inner wall of the housing 2 against 2d. . Therefore, the chambers 2a and 2b are formed by the housing 2, the partition plate 5, the edge member 18, and the diaphragms 10a and 10b. The edge member 18 has, for example, elasticity or flexibility so that the diaphragms 10a and 10b can vibrate, and is made of resin or rubber.

  The diaphragms 10a and 10b have substantially the same configuration. Specifically, the diaphragms 10a and 10b are made of, for example, a flexible film-like substance, and are formed of, for example, a PET (polyethylene terephthalate) film. The diaphragms 10 a and 10 b vibrate in the direction of arrow R in FIG. 2, and the vibration is controlled by the control unit 19. Specifically, for example, planar coils are installed on the diaphragms 10a and 10b, respectively, and permanent magnets (not shown) are provided in the vicinity of the diaphragms 10a and 10b, for example, on the ceiling and bottom of the housing 2 respectively. Should just be installed. That is, when a voltage is applied to these planar coils, electromagnetic force acts on each planar coil, and the diaphragms 10a and 10b vibrate. The control unit 19 includes, for example, a power supply circuit for applying a sinusoidal AC voltage to each planar coil, a control circuit for controlling the power supply circuit, and the like.

  The configurations of the diaphragms 10a and 10b are not limited to those using electromagnetic drive as described above. For example, a piezoelectric element may be attached to the vibration plate 10a to use piezoelectric driving, or the vibration plate 10a itself may be composed of a piezoelectric body and an electrode film. Alternatively, an electrode may be provided in place of the permanent magnet, and an electrostatic force may be generated between the planar coil attached to the diaphragm to vibrate the diaphragms 10a and 10b.

  For example, a plurality of nozzles 3 a and 3 b each having an internal flow path communicating with the chambers 2 a and 2 b are provided on the side surface of the housing 2. The nozzles 3a and 3b do not have to have a shape protruding from the housing 2 or the like. That is, since the air included in the housing 2 only needs to be ejected to the outside of the housing 2, only the side surface of the housing 2 or the like may be opened.

  The operation of the jet flow generating device 1 configured as described above will be described. The control unit 19 causes the diaphragms 10a and 10b to vibrate in a sine wave in synchronization with each other in opposite directions. Specifically, first, in FIG. 2, the diaphragm 10a is bent downward and the diaphragm 10b is bent upward, whereby the volume of the chamber 2a is reduced. When the volume of the chamber 2a is reduced, the pressure of the chamber 2a is increased, and the air in the chamber 2a is discharged from the nozzle 3a to the outside by the increasing action. On the contrary, the volume of the chamber 2b is reduced by the vibration plate 10a being bent upward and the vibration plate 10b being bent downward. As the volume of the chamber 2b decreases, the pressure of the chamber 2b increases, and the air in the chamber 2b is discharged from the nozzle 3b to the outside by the increasing action. Thus, air is alternately ejected from the nozzles 3a and 3b. By blowing the air thus ejected onto, for example, the high heat part, the high heat part can be cooled.

  On the other hand, the vibrations of the diaphragms 10a and 10b propagate as sound waves in the air. In particular, noise is generated from the nozzles. However, if air is discharged separately from the nozzles 3a and 3b, noise is generated from the nozzles 3a and 3b. However, in this jet flow generator 1, discharge sound is alternately generated from the nozzles 3a and 3b. That is, since the sound waves generated from the nozzles 3a and 3b are in opposite phases, they weaken or cancel each other. Thereby, noise is reduced as a whole.

  As shown in FIG. 1, when the distance between the nozzle 3a and the nozzle 3b is d (distance between the openings) and the wavelength of the sound wave (wavelength of the fundamental wave) is λ (m), d <λ / 2, It is desirable that d <λ / 6 is satisfied. In this way, there is no place where the sound waves generated from the nozzles 3a and the like are strengthened at almost the maximum amplitude, so that the generation of noise can be prevented as much as possible.

  As described above, in the present embodiment, sound is generated from the nozzles 3a and 3b in opposite phases to each other, so that the sounds are weakened and noise can be reduced. In addition, since two diaphragms 10a and 10b are provided inside one housing 2, the change in volume of the chambers 2a and 2b can be increased by the vibration of these diaphragms 10a and 10b. The amount of air discharged can be increased. Therefore, the cooling capacity can be improved.

  In particular, the diaphragms 10a and 10b are opposed to each other, that is, the diaphragms 10a and 10b are arranged so as to be stacked, so that the installation area of the jet flow generating device 1 is provided with one diaphragm. In this case, the discharge amount can be increased in the same manner as the installation area of the jet flow generator. That is, the cooling capacity can be increased while achieving space saving.

  Furthermore, since the inside of the housing | casing 2 is partitioned off by the partition plate 5 which supports the diaphragms 10a and 10b integrally, and the chambers 2a and 2b are formed, the housing | casing for forming each chamber 2a and 2b The internal space can be used effectively. Thereby, size reduction of the housing | casing 2 and by extension, the jet flow generator 1 can be achieved.

  In the present embodiment, the vibrations of the diaphragms 10 a and 10 b are absorbed to some extent by the edge member 18, but a part thereof is transmitted to the housing 2. Here, if the vibration plates 10a and 10b are arranged side by side and are vibrated synchronously in the same direction, not in the reverse direction, and when those vibrations are transmitted to the case 2, the case 2 2 may vibrate and noise may occur. However, the vibration transmitted to the housing is canceled by causing the diaphragms 10a and 10b to vibrate in the reverse direction as in the present embodiment. Thereby, it can suppress that noise generate | occur | produces.

  FIG. 3 is a cross-sectional view showing a jet flow generating apparatus according to the second embodiment of the present invention. In the description after the second embodiment, the description of the same members and functions of the jet flow generating device 1 according to the first embodiment will be simplified or omitted, and different points will be mainly described.

  The nozzles 13a and 13b provided in the jet flow generating device 11 are provided on the side surface opposite to the side surface of the casing 2 in which the nozzles 3a and 3b of the jet flow generating device 1 are provided. The nozzle 13a penetrates 2ca which penetrates the side surface of the partition plate 5, and the chamber 2a and the flow path in the nozzle communicate with each other. Even with such a configuration, the same effects as those of the jet flow generating device 1 can be obtained.

  Moreover, both the nozzles 13a and 13b are provided so that one end thereof protrudes into the housing 2, and is formed longer than the nozzles 3a and 3b. Since the nozzles 13a and 13b are formed long in this way, the sound formed by the nozzles 13a and 13b can be made as low as possible, thereby reducing noise in terms of human hearing characteristics. Further, as described above, even though the nozzles 13a and 13b are formed longer than the nozzles 3a and 3b, the nozzles 13a and 13b are provided so as to protrude into the housing 2, so that the jet generator 11 The width dimension in FIG. 3 is not made larger than that of the jet flow generator 1. Thereby, size reduction can be achieved.

  FIG. 4 is a perspective view showing the inside of the casing of the jet flow generating device according to the third embodiment of the present invention. FIG. 5 is a sectional view thereof.

  For example, four diaphragms 10a, 10b, 10c, and 10d are disposed inside the housing 22 of the jet flow generating device 21 according to the present embodiment. For example, in these diaphragms 10a to 10d, the first diaphragm 10a and the second diaphragm 10b face each other, and the third diaphragm 10c and the fourth diaphragm 10d face each other. Thus, the diaphragms 10a, 10b, 10c and 10d are integrally supported by the partition plate 25. The partition plate 25 includes an upper swash plate 25 a and a lower swash plate 25 b, the upper swash plate 25 a is connected to the upper portion of the housing 2, and the lower swash plate 25 b is connected to the bottom of the housing 2. . Thereby, the symmetrical chambers 22a and 22b are formed. As shown in FIG. 4, the side surface of the housing 22 is provided with a nozzle 3 a in which the internal flow path communicates with the chamber 22 a, and a nozzle 3 b in which the internal flow path communicates with the chamber 22 b. Some of them are omitted for the sake of clarity. These nozzles 3a and 3b are arranged in a straight line. Since the symmetrical chambers 22a and 22b are formed in this way, the sound waves generated from the nozzles 3a and 3b can be equalized, so that noise can be reduced as much as possible.

  The operation of the jet flow generating device 21 configured as described above will be described. Under the control of a control unit (not shown), the first diaphragm 10a and the third diaphragm 10c bend upward in FIG. 5, and the second diaphragm 10b and the fourth diaphragm 10d bend downward. As a result, the volume of the chamber 22a decreases. When the volume of the chamber 2a is reduced, the pressure of the chamber 2a is increased, and the air in the chamber 22a is discharged from the nozzle 3a to the outside by the increasing action. Conversely, the first diaphragm 10a and the third diaphragm 10c bend downward, and the second diaphragm 10b and the fourth diaphragm 10d bend upward, thereby reducing the volume of the chamber 2b. As the volume of the chamber 2b decreases, the pressure of the chamber 2b increases, and the air in the chamber 2b is discharged from the nozzle 3b to the outside by the increasing action. Thus, air is alternately ejected from the nozzles 3a and 3b.

  In the present embodiment, the third diaphragm 10c in addition to the first diaphragm 10a further changes the volume of the first chamber 22a, and the fourth diaphragm 10d in addition to the second diaphragm 10b Further, by changing the volume of the second chamber 22b, the change in the volume of each chamber 22a and 22b is further increased, and the amount of air discharged can be increased.

  Moreover, since the inside of the housing | casing 22 is partitioned off by the partition plate 25 which supports four diaphragms 10a-10d integrally, the space inside the housing | casing for forming each chamber 22a and 22b should be used effectively. Can do.

  In the present embodiment, when the distance between the nozzle 3a and the nozzle 3b at which the nozzle 3a and the nozzle 3b are farthest from each other is d, the above formula d <λ / 2 or d <λ / 6 should be satisfied. By doing so, there is no place where the sound waves generated from the nozzles 3a and the like are strengthened at almost the maximum amplitude.

  6 and 7 are cross-sectional views showing modifications of the jet generating device shown in FIG. In the example shown in FIG. 6, a row of nozzles 23a and 23b is further provided above the row of nozzles 3a and 3b. In the example shown in FIG. 7, a row of nozzles 33a and 33b is further added to the configuration shown in FIG. In this manner, the number of nozzles can be increased as appropriate, and an optimum air discharge amount can be obtained if the number is set to an optimum number depending on the amplitude of each of the diaphragms 10a to 10d and the volume of the chamber 22a.

  FIG. 8 is a sectional view showing a jet generating apparatus according to the fourth embodiment of the present invention. In the jet flow generating device 31, four diaphragms 10a to 10d are integrally supported by the partition member 35, similarly to the jet flow generating device 21 according to the third embodiment. FIG. 9 shows a perspective view of the partition member 35. The partition member 35 is connected to a swash plate 35a and a swash plate 35b, and is connected to a flow path forming member 35d having an air flow path therein, and a swash plate 35b and a swash plate 35c. A flow path forming member 35e having a flow path is provided. The inside of the housing | casing 32 is partitioned off by the partition member 35 comprised in this way, and the chambers 32a and 32b are formed. The nozzle 3a is connected to the chamber 32a, and the nozzle 3b is connected to the chamber 32b.

  Even with such a configuration, the chambers 32a and 32b can be made symmetrical, and noise can be reduced. Further, the space inside the housing 32 can be used effectively.

  FIG. 10 is a cross-sectional view showing a modification of the jet flow generating device 31 shown in FIG. A partition member 45 configured by laminating a plurality of the above-described partition members 35 (see FIG. 9) is provided inside the casing 42 of the jet flow generating device 41. In this jet flow generating device 41, the diaphragms 10a, 10c, 10f and 10h are bent upward in FIG. 10 and the diaphragms 10b, 10d, 10e and 10g are bent downward under the control of a control unit (not shown). As a result, the volume of the chamber 42a decreases. Thereby, air is discharged outside from the nozzle 3a connected to the chamber 42a. On the other hand, the vibration plates 10a to 10h bend in the opposite direction to the above, whereby the volume of the chamber 42b is reduced. As a result, air is discharged from the nozzle 3b connected to the chamber 42b to the outside.

  FIG. 11: is sectional drawing which shows the jet flow generator which concerns on the 5th Embodiment of this invention. The jet flow generating device 51 is configured such that the diaphragms 10a and 10b face each other inside the housing 52, and the diaphragms 10c and 10d face each other. Thereby, chambers 52a, 52b and 52c are formed in order from the top of the casing 52. A control unit (not shown) controls the diaphragms 10a and 10b to vibrate in synchronization with each other in opposite directions, and the diaphragms 10c and 10d to vibrate in synchronization with each other in opposite directions. The plurality of nozzles 3a, 3b and 3c are connected to chambers 52a, 52b and 52c, respectively. In this case, the number of nozzles is set so that the refrigerant is discharged from each nozzle with an optimal discharge amount.

  With such a configuration of the jet flow generation device 51, noise suppression cannot be expected as compared with the jet flow generation devices according to the above embodiments. However, for example, the refrigerant discharge amount can be increased while the installation area of the jet flow generating device 51 is reduced as compared with the case where four diaphragms 10a to 10d are arranged horizontally.

  FIG. 12: is sectional drawing which shows the jet flow generator which concerns on the 6th Embodiment of this invention. 13 is a cross-sectional view taken along line AA shown in FIG. A partition plate 65 erected in the same direction as the vibration direction of the vibration plates 10a and 10b is disposed in the center of the inside of the casing 62 of the jet flow generating device 61. Thereby, in FIG.12 and FIG.13, an area | region is divided in a horizontal direction. Further, the divided area is divided into chambers 62a and 62b by the diaphragm 10a, and divided into chambers 62c and 62d by the diaphragm 10b. A plurality of nozzles 3a, 3b, 3c and 3d are provided for each of the chambers 62a to 62d. The diaphragm 10a and the diaphragm 10b are controlled to vibrate synchronously in opposite directions.

  In the present embodiment, since the sound waves generated from the nozzles 3a and 3b are weakened and the sound waves generated from the nozzles 3c and 3d are weakened, noise is reduced. Further, since the vibration plates 10a and 10b vibrate in opposite directions, the vibrations are canceled out and the occurrence of noise in the housing 62 can be suppressed.

  In the case of the present embodiment, since both the diaphragms 10a and 10b are not facing each other, a counterclockwise moment in FIG. However, there is no problem if the amplitudes of the diaphragms 10a and 10b are small and the moment is small.

It is a perspective view which shows the jet flow generator which concerns on the 1st Embodiment of this invention. It is sectional drawing of the jet flow generator shown in FIG. It is sectional drawing which shows the jet flow generator which concerns on the 2nd Embodiment of this invention. It is a perspective view which shows the inside of the housing | casing of the jet flow generator which concerns on the 3rd Embodiment of this invention. It is sectional drawing of the jet flow generator shown in FIG. It is sectional drawing which shows the modification of the jet flow generator shown in FIG. It is sectional drawing which shows another modification of the jet flow generator shown in FIG. It is sectional drawing which shows the jet flow generator which concerns on the 4th Embodiment of this invention. It is a perspective view which shows a partition member. It is sectional drawing which shows the modification of the jet flow generator shown in FIG. It is sectional drawing which shows the jet flow generator which concerns on the 5th Embodiment of this invention. It is sectional drawing which shows the jet flow generator which concerns on the 6th Embodiment of this invention. It is AA sectional view taken on the line shown in FIG.

Explanation of symbols

R ... Vibration direction 1, 11, 21, 41, 51, 61 ... Jet generator 2, 22, 32, 42, 52, 62 ... Housings 2a, 2b, 22a, 22b, 32a, 32b, 42a, 42b, 52a , 52b, 52c, 62a, 62b, 62c, 62d ... Chamber 3a, 3b, 3c, 3d, 13a, 13b, 23a, 23b, 33a, 33b ... Nozzle 5, 25 ... Partition plate 10a, 10b, 10c, 10d, 10e 10f, 10g, 10h ... diaphragm 35, 45, 65 ... partition member

Claims (9)

A housing having first and second openings, and first and second chambers communicating with the first and second openings, respectively, and containing gas therein;
The first chamber and the second chamber are oscillated synchronously to increase the volume of the first chamber and to decrease the volume of the first chamber to each other to form the first chamber and the second chamber. Therefore, the first and second diaphragms are arranged so as to partition the inside of the housing, and the first and second diaphragms vibrate alternately through the first and second openings. And a vibration mechanism for discharging the gas as a pulsating flow. The jet generator according to claim 1,
The jet generator according to claim 1, wherein the first and second diaphragms vibrate in opposite directions. The jet generating device according to claim 2,
And a partition member configured to integrally support the first diaphragm and the second diaphragm and partition the interior of the housing so as to form the first and second chambers. A jet generator. A jet generator according to claim 2,
The vibration mechanism is
A third diaphragm that vibrates to increase or decrease the volume of the first chamber in synchronization with the first diaphragm;
A fourth diaphragm that vibrates in opposite directions to the third diaphragm and vibrates to increase or decrease the volume of the first chamber in synchronization with the second diaphragm. A jet generator. The jet generator according to claim 4,
A partition member that integrally supports the first, second, third, and fourth diaphragms and that partitions the interior of the housing so as to form the first and second chambers; Characteristic jet generator. The jet generator according to claim 5,
A jet flow generating apparatus characterized in that the first and second chambers have substantially the same shape. The first, second, third, and fourth openings, the first chamber that communicates with the first and second openings, and the second chamber that communicates with the third and fourth openings are provided. And a housing containing gas inside,
A first diaphragm disposed in the first chamber; and a second diaphragm disposed in the second chamber and oscillating in synchronization with the first diaphragm in a reverse direction; The gas is alternately discharged as a pulsating flow through the first and second openings by the vibration of the first diaphragm, and the third and fourth openings are discharged by the vibration of the second diaphragm. And a vibration mechanism for alternately discharging the gas as a pulsating flow. A heating element;
A housing having first and second openings, and first and second chambers communicating with the first and second openings, respectively, and containing gas therein;
The first chamber and the second chamber are oscillated synchronously to increase the volume of the first chamber and to decrease the volume of the first chamber to each other to form the first chamber and the second chamber. For this purpose, the first and second diaphragms are arranged so as to partition the inside of the casing, and the first and second diaphragms vibrate through the first and second openings. An electronic device comprising: a vibration mechanism that alternately discharges the gas as a pulsating flow toward the heating element. A heating element;
The first, second, third, and fourth openings, the first chamber that communicates with the first and second openings, and the second chamber that communicates with the third and fourth openings are provided. And a housing containing gas inside,
A first diaphragm disposed in the first chamber; and a second diaphragm disposed in the second chamber and oscillating in synchronization with the first diaphragm in a reverse direction; The gas is alternately discharged as a pulsating flow through the first and second openings by the vibration of the first diaphragm, and the third and fourth openings are discharged by the vibration of the second diaphragm. And an oscillating mechanism for alternately discharging the gas as a pulsating flow toward the heating element.

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