JP2016075424A - Two-fluid sprayer and outdoor machine of air conditioning device including the same - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a two-fluid sprayer capable of atomizing droplet at low pressure such as pressure of city water, even without supplying high-pressure water to the two-fluid sprayer, and an outdoor machine of an air conditioning device including the two-fluid sprayer.SOLUTION: A two-fluid sprayer 2 includes: a bubble generation unit 5 passing gas-liquid two-phase flow to generate bubbles; a bubble miniaturization unit 6 miniaturizing bubbles contained in the gas-liquid two-phase flow having passed through the bubble generation unit 5; and a spay unit 7 having a jet hole 70 jetting the gas-liquid two-phase flow having passed through the bubble miniaturization unit 6.SELECTED DRAWING: Figure 3

Description

  The present invention relates to a two-fluid sprayer and an outdoor unit of an air conditioner including the two-fluid sprayer.

  DESCRIPTION OF RELATED ART Conventionally, the outdoor unit of the air conditioning apparatus provided with the two-fluid sprayer which sprays water on the air which goes to a heat exchanger, and cools a heat exchanger auxiliary is known (for example, patent document 1). In this outdoor unit, air directed to the heat exchanger is cooled by the sprayed water, so that power (power consumption) required for the air conditioner can be reduced. In such an outdoor unit, when water droplets sprayed from the two-fluid sprayer adhere to the surface of the heat exchanger, the heat exchanger may corrode. It is desirable that it is atomized so as to evaporate before reaching.

JP2013-83431A

  By the way, for atomization of water droplets sprayed from the ejection holes in the two-fluid sprayer, the spray pressure and the mass flow rate ratio of air and water supplied to the two-fluid sprayer (GLR = mass flow rate of air / mass flow rate of water) And is related. For example, when the GLR increases, the amount of air that contributes to atomization of water droplets increases and the atomization effect increases. On the other hand, in order to atomize water droplets with a low GLR, it is necessary to increase the spray pressure.

  The atomization of water droplets is also related to the flow mode of the two-phase flow in the two-fluid sprayer. The flow pattern of the two fluids changes as a bubble flow, a plug flow, a slag flow, an annular flow, and the like as the GLR increases. Among these, when it becomes a plug flow, a slag flow, etc., spray becomes unstable, and the atomization effect falls as a result. Moreover, although the annular flow and the bubble flow can obtain a stable spray, the bubble flow has higher atomization efficiency.

  That is, in the case of a low GLR, since it is necessary to supply high-pressure water to the two-fluid sprayer, water droplets cannot be atomized with tap water pressure. However, when the GLR is increased, the flow pattern becomes an annular flow, and the atomization efficiency is lowered as compared with the bubble flow that can be realized only when the GLR is low.

  An object of the present invention is to provide a two-fluid sprayer capable of atomizing water droplets at a low pressure of about the pressure of tap water without supplying high-pressure water to the two-fluid sprayer, and an outdoor unit of an air conditioner equipped with the two-fluid sprayer Is to provide.

  The two-fluid sprayer (2) of the present invention includes a bubble generation unit (5) that generates a bubble by passing a gas-liquid two-phase flow of air and water, and a gas-liquid two-phase that has passed through the bubble generation unit (5). A bubble refining section (6) for refining bubbles contained in the flow, and a spray section (7) having an ejection hole (70) for ejecting a gas-liquid two-phase flow after passing through the bubble refining section (6) And).

  Inside the two-fluid sprayer (2) to which air and water are supplied so as to have a high GLR (ie, GLR ≧ 0.04), the flow mode of the gas-liquid two-phase flow tends to be an annular flow. Therefore, in the present invention, a gas-liquid two-phase flow whose flow pattern is an annular flow inside the two-fluid sprayer (2) is generated during the period from the inside of the two-fluid sprayer to the ejection hole (70). In the step (5) and the bubble refining portion (6), the bubbles are changed stepwise into a gas-liquid two-phase flow.

  That is, in the present invention, a gas-liquid two-phase flow having an annular flow mode passes through the bubble generation unit (5) to generate bubbles, and the gas-liquid two-phase flow that has passed through the bubble generation unit (5). In the bubble refinement section (6). As described above, in the gas-liquid two-phase flow in which the flow mode is an annular flow, the fine bubbles are dispersed by the stepwise refinement of the bubbles in the bubble generation unit (5) and the bubble refinement unit (6). It changes into a gas-liquid two-phase flow (a gas-liquid two-phase flow in which the flow mode is a bubble flow or a gas-liquid two-phase flow in a fluid state close thereto). A gas-liquid two-phase flow in which fine bubbles are dispersed is ejected from the ejection hole (70) in the spray section (7). At this time, water droplets are atomized by the force that fine bubbles burst at or near the ejection hole (70). From the above, in the present invention, water droplets can be atomized even at a tap water pressure or a pressure close thereto.

  It should be noted that the annular flow is directly changed to the bubble flow or a flow state close thereto by a single means, not the stepwise means using the bubble generation part (5) and the bubble refinement part (6) as in the present invention. It is difficult. On the other hand, as in the present invention, by generating bubbles in the bubble generation unit (5) in advance in an intermediate size to the extent that bubbles can be reduced in the bubble refinement unit (6), Therefore, it is possible to effectively generate a gas-liquid two-phase flow in a bubble state or a flow state close thereto.

  In addition, for example, if an annular flow is changed to a bubble flow or a flow state close thereto with a single porous body, there is a problem that the pressure loss when passing through the porous body becomes too large. In the present invention to be miniaturized, such an increase in pressure loss can be suppressed.

  In the two-fluid sprayer (2), the bubble refining unit (6) includes a porous body (61) through which a gas-liquid two-phase flow after passing through the bubble generation unit (5) passes, and the bubble generation unit It is preferable to have at least one of the ultrasonic application part (62) which provides an ultrasonic wave to the gas-liquid two-phase flow after passing through (5).

  In this configuration, by adopting at least one of the porous body (61) and the ultrasonic wave imparting section (62) as a means for further miniaturizing the medium-sized bubbles generated in the bubble generating section (5). The gas-liquid two-phase flow in which fine bubbles are dispersed can be stably supplied to the ejection hole (70) of the spray section (7).

  In the two-fluid sprayer (2), the bubble generation unit (5) includes a porous body (51) through which the gas-liquid two-phase flow passes, and a swirl flow applying unit (providing swirl flow to the gas-liquid two-phase flow ( 52) and at least one of the resistors (53, 54) serving as resistance to the flow of the gas-liquid two-phase flow.

  The bubble generation part (5) should just be a thing which can produce | generate the bubble of the intermediate | middle magnitude | size which can refine | miniaturize a bubble in the bubble refinement | miniaturization part (6). Therefore, at least one of the porous body (51), the swirl flow imparting section (52), and the resistors (53, 54) can be adopted as the bubble generating section (5) as described above. Examples of the resistor include a plate-like portion (53) as shown in FIGS. 8 and 9 described later, a stepped portion (54) as shown in FIGS.

  In the two-fluid sprayer (2), the bubble generation unit (5) has a first porous body (51) through which the gas-liquid two-phase flow passes, and the bubble refinement unit (6) The gas-liquid two-phase flow after passing through the bubble generating part (5) passes, and has a second porous body (61) that is finer than the first porous body (51). Also good.

  In this configuration, bubbles having an intermediate size that can be reduced in size in the bubble refinement unit (6) are generated in the first porous body (51). The porous body (61) can be further miniaturized.

  In the two-fluid sprayer (2), the bubble generating part (5) includes a gap (50) provided between the first porous body (51) and the second porous body (61). It is preferable.

  In this configuration, since the gap (50) is provided between the first porous body (51) and the second porous body (61), a plurality of bubbles of intermediate sizes can be stably generated. can do.

  The outdoor unit of the air conditioning apparatus according to the present invention includes a heat exchanger (11) and the two-fluid sprayer (2) that sprays water onto the air toward the heat exchanger (11).

  In this configuration, since the atomized water droplets can be sprayed in the two-fluid sprayer (2), the air toward the heat exchanger is cooled by the sprayed water, and as a result, the operation of the outdoor unit of the air conditioner It is possible to reduce the necessary input. Further, in this configuration, since the water droplets can be atomized at the pressure of tap water or a pressure close thereto in the two-fluid sprayer (2), for example, means for increasing the water pressure (means for increasing the spray pressure) are separately provided. It does not have to be provided.

  According to the present invention, in a two-fluid sprayer, water droplets can be atomized at tap water pressure or pressure close thereto.

It is the schematic which shows the outdoor unit of the air conditioning apparatus provided with the two-fluid sprayer which concerns on embodiment of this invention. It is a perspective view which shows the example of arrangement | positioning of the two-fluid sprayer in the said outdoor unit, a heat exchanger, and a blower outlet. It is sectional drawing which shows the said 2 fluid sprayer. It is sectional drawing which shows the two-fluid sprayer which concerns on 1st Embodiment of this invention. It is sectional drawing which shows the two-fluid sprayer which concerns on 2nd Embodiment of this invention. It is sectional drawing which shows the two-fluid sprayer which concerns on 3rd Embodiment of this invention. It is sectional drawing which shows the two-fluid sprayer which concerns on 4th Embodiment of this invention. It is sectional drawing which shows the two-fluid sprayer which concerns on 5th Embodiment of this invention. It is sectional drawing which shows the two-fluid sprayer which concerns on 6th Embodiment of this invention. It is sectional drawing which shows the two-fluid sprayer which concerns on 7th Embodiment of this invention. (A) is sectional drawing which shows an example of the resistor in the two-fluid sprayer of 7th Embodiment, (B) is sectional drawing which shows the other example of the resistor in the two-fluid sprayer of 7th Embodiment. is there. It is sectional drawing which shows the two-fluid sprayer which concerns on 8th Embodiment of this invention. It is the schematic which shows the modification 1 of the said outdoor unit. It is the schematic which shows the modification 2 of the said outdoor unit. It is the schematic which shows the modification 3 of the said outdoor unit.

  Hereinafter, a two-fluid sprayer 2 according to an embodiment of the present invention and an outdoor unit 10 of an air conditioner including the same will be described with reference to the drawings. The air conditioner includes an outdoor unit 10 shown in FIG. 1, an indoor unit (not shown), and a communication pipe (refrigerant pipe) (not shown) that connects them. The air conditioner includes a refrigerant circuit that performs a vapor compression refrigeration cycle.

[Outdoor unit of air conditioner]
As shown in FIG. 1, the outdoor unit 10 includes a spray mechanism 1, a heat exchanger 11, a blower 12, a compressor 13, a control unit 14, an outside air temperature sensor 15, and the like. The heat exchanger 11, the blower 12, the compressor 13, and the control unit 14 are accommodated in the case 16 of the outdoor unit 10. The control unit 14 controls operations of the spray mechanism 1, the blower 12, the compressor 13, and the like. The heat exchanger 11 and the compressor 13 are provided in the refrigerant circuit.

  The spray mechanism 1 can cool the outside air toward the heat exchanger 11 during the cooling operation. The spray mechanism 1 can enhance the effect of cooling the heat transfer tubes and the refrigerant of the heat exchanger 11 by reducing the temperature of the outside air toward the heat exchanger 11. In this way, the spray mechanism 1 can supplement the heat exchanger 11 and the refrigerant in an auxiliary manner to increase the cooling capacity of the air conditioner. Details of the spray mechanism 1 will be described later.

  Examples of the heat exchanger 11 include, but are not limited to, a cross fin coil heat exchanger. The cross fin coil heat exchanger includes a heat transfer tube and a large number of plate fins through which the heat transfer tube penetrates. A refrigerant flows through the heat transfer tube, and outside air flows between the plate fins. In the specific example shown in FIG. 2, the heat exchanger 11 is erected upward with respect to the installation surface (horizontal plane) of the outdoor unit 10 and has a substantially U shape in plan view. However, the arrangement of the heat exchanger 11 is not limited to this. Of the four side plates of the case 16, three side plates 16 a, 16 b, 16 c facing the heat exchanger 11 are provided with suction ports (not shown) for sucking outside air into the case 16. Further, the top plate 16d of the case 16 is provided with an air outlet 16e for blowing the air in the case 16 to the outside.

  As the blower 12, for example, an axial blower, a centrifugal blower, a mixed flow blower, or the like can be used. As shown in FIG. 1, the blower 12 includes an impeller 12a and a motor (not shown) that rotates the impeller 12a. In this embodiment, the air blower 12 is provided in the upper part in the case 16, and is arrange | positioned directly under the blower outlet 16e shown in FIG. However, the arrangement of the blower 12 is not limited to this. The blower 12 is located downstream of the heat exchanger 11 in the air flow direction.

  During the operation of the air conditioner, the refrigerant is circulated between the outdoor unit 10 and the indoor unit by operating the compressor 13, and the impeller 12 a is rotated by operating the motor of the blower 12. Is sucked into the case 16 from the suction port of the case 16. The outside air sucked into the case 16 exchanges heat with the refrigerant in the heat exchanger 11 and then blows out to the outside of the case 16 through the air outlet 16e.

  For example, during the cooling operation, the outside air sucked into the case 16 exchanges heat with the high-temperature and high-pressure refrigerant flowing in the heat transfer tube via the heat transfer tube in the heat exchanger 11 functioning as a condenser. That is, the outside air cools the heat transfer tubes and the refrigerant of the heat exchanger 11. Thereby, the refrigerant | coolant which flows through the heat exchanger tube of the heat exchanger 11 is cooled and condensed. The outside air temperature sensor 15 can detect the outside air temperature.

[Spraying mechanism]
Next, the spray mechanism 1 will be described. As shown in FIG. 1, the spray mechanism 1 includes one or a plurality of two-fluid sprayers 2, a liquid supply mechanism 80, and a gas supply mechanism 90. Hereinafter, the case where the spray mechanism 1 includes a plurality of two-fluid sprayers 2 will be described as an example. However, the spray mechanism 1 may include only one two-fluid sprayer 2.

  The arrangement of the plurality of two-fluid sprayers 2 is not particularly limited. For example, an arrangement example as shown in FIG. 2 can be given. In the arrangement example shown in FIG. 2, the plurality of two-fluid sprayers 2 are arranged at positions facing the heat exchanger 11. Each two-fluid sprayer 2 is located upstream of the heat exchanger 11 in the direction of the airflow formed by the rotation of the impeller 12 a of the blower 12. In the present embodiment, the plurality of two-fluid sprayers 2 are arranged on the side of the heat exchanger 11. Specifically, each of the three side plates 16a, 16b, and 16c along the heat exchanger 11 is disposed so that one or a plurality of two-fluid sprayers 2 face each other.

  The plurality of two-fluid sprayers 2 are spaced apart from each other at the three side plates 16a, 16b, 16c facing the heat exchanger 11 so that the cooling effect of the two-fluid sprayer 2 is exerted over almost the entire heat exchanger 11. Has been placed. Each two-fluid sprayer 2 is supported by a side plate of the case 16, a top plate, or a support member (not shown) separately provided on the case 16.

  Each two-fluid sprayer 2 sprays water on the air toward the heat exchanger 11. In the embodiment shown in FIG. 1, the spray direction of water droplets in the two-fluid sprayer 2 is directed to the side opposite to the heat exchanger 11 (the direction away from the heat exchanger 11), but is not limited thereto. For example, the spray direction of water droplets in the two-fluid sprayer 2 may be directed toward the heat exchanger 11 as in Modification 2 of the outdoor unit 10 shown in FIG. 12, and the modification 3 of Modification 3 of the outdoor unit 10 shown in FIG. Thus, the spraying direction of the water droplets in the two-fluid sprayer 2 may be directed in the direction along the heat exchanger 11 (downward in FIG. 15).

  In the embodiment shown in FIG. 1, water droplets sprayed from the two-fluid sprayer 2 are diffused radially in the air toward the side opposite to the heat exchanger 11, as indicated by a dashed line arrow in FIG. 1. The direction gradually changes to the heat exchanger 11 side and moves toward the heat exchanger 11. All or most of the water droplets are vaporized before reaching the heat exchanger 11.

  The liquid supply mechanism 80 includes a liquid feed pipe 81 and a liquid feed pump 82. The liquid feed pipe 81 connects a water supply source 100 such as a water supply and the two-fluid sprayer 2. The liquid feed pump 82 sends water to the two-fluid sprayer 2 through the liquid feed pipe 81.

  The gas supply mechanism 90 includes an air feed pipe 91 and an air feed pump 92 such as a compressor. The air feed pipe 91 connects the air feed pump 92 and the two-fluid sprayer 2. The air feed pump 92 sends air to the two-fluid sprayer 2 through the air feed pipe 91.

  FIG. 1 shows a state in which a liquid supply mechanism 80 and a gas supply mechanism 90 are connected to one two-fluid sprayer 2, and illustration of the other two-fluid sprayer 2 is omitted. The mechanism 80 and the gas supply mechanism 90 are connected to the other two-fluid sprayer 2 similarly to the connection state shown in FIG. Specifically, for example, the liquid feed pipe 81 of the liquid supply mechanism 80 is branched in the middle and connected to the plurality of two-fluid sprayers 2, and the air feed pipe 91 of the gas supply mechanism 90 is branched in the middle to be plural. To the two-fluid sprayer 2.

  When the outside air temperature sensor 15 detects that the outside air temperature has reached a predetermined temperature or more, the control unit 14 determines that the cooling operation load has exceeded a predetermined level, and controls the liquid feed pump 82 and the air feed pump 92. Then, spraying of water is started from the plurality of two-fluid sprayers 2. For example, the control unit 14 controls the liquid feed pump 82 and the air feed pump 92 such that water is sprayed continuously or intermittently from each of the two fluid sprayers 2 for a predetermined time.

  When the liquid feed pump 82 and the air feed pump 92 are operated, water is supplied to the two-fluid sprayer 2 through the liquid feed pipe 81 and air is supplied to the two-fluid sprayer 2 through the air feed pipe 91. Thereby, the water droplet refined | miniaturized from the two fluid sprayer 2 is sprayed.

[Two fluid sprayer]
Next, the two-fluid sprayer 2 will be described in detail. FIG. 3 is a cross-sectional view showing the two-fluid sprayer 2 according to the embodiment of the present invention. The two-fluid sprayer 2 of the present embodiment can atomize water droplets with tap water pressure or pressure close thereto. As shown in FIG. 3, the two-fluid sprayer 2 includes a gas-liquid mixing unit 3 in which air and water are mixed, a bubble generating unit 5, a bubble refining unit 6, and a spraying unit 7. The gas-liquid mixing unit 3, the bubble generating unit 5, the bubble refining unit 6, and the spraying unit 7 are arranged in this order along the direction in which the gas-liquid two-phase flow flows.

  The two-fluid sprayer 2 includes, for example, a cylindrical case 8. However, the shape of the case 8 is not limited to a cylindrical shape. The axial length of the case 8 may be set to, for example, about 50 mm to 300 mm (for example, 100 mm), and the inner diameter of the case 8 may be set to, for example, about 5 mm to 30 mm (for example, 10 mm). The size of the case 8 is not limited to the above length and diameter.

  As shown in FIG. 3, the water L flowing through the liquid feed pipe 81 is supplied to the gas-liquid mixing unit 3 through the water inlet 8a, and the air G flowing through the air feed pipe 91 is supplied through the air inlet 8b. In the present embodiment, the mass flow ratio (GLR) of air and water supplied to the gas-liquid mixing unit 3 of the two-fluid sprayer 2 is set to 0.04 or more. The upper limit value of GLR is not particularly limited, but a specific example is as follows.

  In the spraying experiment, even if the GLR was 3.149, fine water droplets could be sprayed from the two-fluid sprayer 2. Therefore, the GLR can be set to, for example, 3.149 or less. In order to obtain a higher atomization effect, the GLR is preferably 0.700 or less, and in order to obtain a higher atomization effect, the GLR is preferably 0.655 or less. In addition, when the GLR was set to 0.454 and the bubble refining unit 6 of the two-fluid sprayer 2 was confirmed using a high speed camera, fine bubbles were generated in the bubble refining unit 6. Therefore, the GLR is more preferably 0.500 or less, and further preferably 0.454 or less. In the present embodiment, considering the experimental results so far, the GLR is particularly preferably 0.04 or more and 0.300 or less. In this case, a large number of bubbles can be generated, and as a result, stable. A spray can be obtained.

  In this embodiment, it is preferable that the pressure of the water supplied to the two-fluid sprayer 2 is not more than the pressure of tap water. Specifically, the pressure of water supplied to the two-fluid sprayer 2 is preferably 0.3 MPa or less, and more preferably 0.2 MPa or less.

  The lower limit of the flow rate of water supplied to the two-fluid sprayer 2 is preferably 0.020 L / min or more, and more preferably 0.030 L / min or more. The upper limit of the water flow rate supplied to the two-fluid sprayer 2 is preferably 2.0 L / min or less, and more preferably 1.0 L / min or less. As a specific example, the flow rate of water flowing into the two-fluid sprayer 2 can be 0.040 L / min to 0.080 L / min, but is not limited thereto.

  While the gas-liquid two-phase flow generated in the gas-liquid mixing unit 3 flows in the case 8 of the two-fluid sprayer 2 toward the spraying unit 7, the flow mode is in the region 4 upstream of the spraying unit 7. It may become an annular flow. In the annular flow, for example, as shown in FIG. 3, a water region is formed in an annular shape along the inner peripheral surface of the case 8, and an air region is formed in the annular water region. However, in the present embodiment, the annular flow is not limited to the case where the water region and the air region are strictly separated as shown in FIG. 3, and some bubbles may be included in the annular water region, Also, some water may flow in the central air region.

  The bubble generation unit 5 generates bubbles by passing a gas-liquid two-phase flow having a GLR of 0.04 or more. Specifically, the bubble generation unit 5 generates in advance an intermediate size bubble (relatively large bubble) to the extent that the bubble can be refined in the bubble refinement unit 6 provided downstream thereof. It is for keeping. As a matter of course, some bubbles may exist in the annular flow, which is the region immediately before the bubble generation unit 5 shown in FIG. 3. In this case, after the annular flow passes through the bubble generation unit 5. Bubbles included in the gas-liquid two-phase flow are more dispersed in water than bubbles included in the annular flow before passing through.

  The bubble refinement unit 6 refines the bubbles contained in the gas-liquid two-phase flow that has passed through the bubble generation unit 5. As shown in FIG. 3, the bubble refinement unit 6 is provided immediately after the bubble generation unit 5 (a position adjacent to the downstream side of the bubble generation unit 5). The bubble refining unit 6 is provided immediately before the spray unit 7 (position adjacent to the upstream side of the spray unit 7). A gas-liquid two-phase flow including bubbles of an intermediate size generated in advance in the bubble generation unit 5 adjacent to the upstream side of the bubble refinement unit 6 is supplied. Thereby, since the air bubbles having an intermediate size are refined in the air bubble refining unit 6, it is possible to effectively generate the air flow or the gas-liquid two-phase flow in the fluid state from the annular flow.

  In the present embodiment shown in FIG. 3, the inner peripheral surface of the case 8 at the tip portion of the two-fluid sprayer 2 is a tapered surface that tapers toward the spray portion 7. That is, at the tip of the two-fluid sprayer 2, the gas-liquid two-phase flow channel tapers as it goes downstream. Thereby, at the front-end | tip part of the two-fluid sprayer 2, the flow velocity of the gas-liquid two-phase flow which flows through the inside of the two-fluid sprayer 2 is gradually raised as it goes to the ejection hole 70 of the spray part 7. FIG.

  The spray unit 7 has an ejection hole 70 for ejecting a gas-liquid two-phase flow after passing through the bubble refining unit 6. In the present embodiment, the boundary between the spray unit 7 and the bubble refining unit 6 is the upstream end of the ejection hole 70. The spray unit 7 is supplied with a gas-liquid two-phase flow in which fine bubbles generated in the bubble refinement unit 6 are dispersed, and the gas-liquid two-phase flow is ejected from the ejection hole 70. At this time, water droplets are atomized by the force that fine bubbles burst at or near the ejection hole 70. The average particle diameter of the water droplets ejected from the ejection hole 70 is not particularly limited, but in the present embodiment, it can be set to 60 μm or less, for example. The speed of water droplets ejected from the ejection hole 70 is, for example, about several tens m / second to several hundreds m / second (for example, about 200 m / second).

  In the two-fluid sprayer 2 of the present embodiment having the above-described structure, the tap water pressure can be obtained without supplying high-pressure water larger than the tap water pressure to the two-fluid sprayer for the following reasons. Water droplets can be atomized at a low pressure.

  That is, in the present embodiment, the two-fluid sprayer 2 is supplied with air and water so as to have a high GLR (that is, GLR ≧ 0.04). In the case of such a high GLR, since the pressure of air becomes high, it is not necessary to increase the water pressure, and as a result, water can be used as the water supply source 100. However, when GLR becomes high, the flow mode of the gas-liquid two-phase flow tends to be an annular flow inside the two-fluid sprayer 2 in which air and water are mixed. When the flow pattern is an annular flow, water droplets sprayed from the ejection holes 70 of the two-fluid sprayer 2 are less likely to be atomized. The two-fluid sprayer 2 of the present embodiment has a flow pattern in which fine bubbles are dispersed in water immediately before being ejected from the ejection hole 70 even if the flow pattern becomes an annular flow inside the two-fluid sprayer 2. If it can be changed, it is based on the idea that water droplets ejected from the ejection holes 70 can be atomized. That is, in the present embodiment, even if air and water are mixed with a high GLR to form an annular flow inside the two-fluid sprayer 2, the bubble flow in the upstream region adjacent to the spray unit 7 of the two-fluid sprayer 2. A high atomization effect can be obtained by generating.

  Although the two-fluid sprayer 2 according to the present embodiment has been described above, a specific example of the two-fluid sprayer 2 will be described in detail below with reference to FIGS. 4 to 12. Each of FIGS. 4 to 12 specifically shows a part of the downstream side (spraying section 7 side) in the two-fluid sprayer 2 of FIG. 3. In addition, the structure of the two-fluid sprayer 2 is not limited to the following 1st Embodiment-8th Embodiment.

[First Embodiment]
FIG. 4 is a cross-sectional view showing the two-fluid sprayer 2 according to the first embodiment of the present invention. As shown in FIG. 4, in the two-fluid sprayer 2 of the first embodiment, the bubble generation unit 5 has a first porous body 51, and the bubble refinement unit 6 has a second porous body 61.

  The first porous body 51 can pass a gas-liquid two-phase flow (a gas-liquid two-phase flow having a mass flow rate ratio GLR of 0.04 or more) generated in the gas-liquid mixing unit 3. That is, the first porous body 51 has water permeability and air permeability. The first porous body 51 has a function of generating bubbles by allowing the gas-liquid two-phase flow generated in the gas-liquid mixing unit 3 to pass therethrough.

  The gas-liquid two-phase flow after passing through the bubble generating unit 5 can pass through the second porous body 61. That is, the second porous body 61 has water permeability and air permeability. The second porous body 61 has a function of refining the bubbles contained in the gas-liquid two-phase flow after passing through the bubble generating unit 5. The second porous body 61 is finer than the first porous body 51.

  Although the structure of the 1st porous body 51, the material which comprises the 1st porous body 51, etc. are not specifically limited, The following forms can be illustrated. The first porous body 51 may be made of, for example, a porous material. This porous material has a continuous flow path through which a gas-liquid two-phase flow can pass. Examples of the porous material include, but are not limited to, a porous plastic, a porous metal, and a porous ceramic. Examples of the porous plastic include a sponge. The porous material may have uniform pores formed in the thickness direction of the first porous body 51, or may be formed so that the porosity changes in the thickness direction. Further, the first porous body 51 may be a plate-like member such as a plastic plate, a metal plate, or a ceramic plate in which a plurality of through holes are formed. An example of the metal plate having a plurality of through holes is punching metal.

  The second porous body 61 may be formed of the porous material as described above, or may be one in which a plurality of through holes are formed in the plate-shaped member as described above. The first porous body 51 and the second porous body 61 may have different structures. Moreover, the 1st porous body 51 and the 2nd porous body 61 may be formed with the same material, and may be formed with a different material.

  As described above, the second porous body 61 is finer than the first porous body 51. In order to make the second porous body 61 finer than the first porous body 51, for example, the following means can be cited. For example, the pore diameter (average pore diameter) of the second porous body 61 may be made smaller than the pore diameter (average pore diameter) of the first porous body 51. Further, the porosity (opening ratio) of the second porous body 61 may be smaller than the porosity (opening ratio) of the first porous body 51. The porosity (opening ratio) is the ratio of the volume of the pores to the total volume of the porous body.

  The pore diameter and porosity of the first porous body 51, the pore diameter and porosity of the second porous body 61, the thickness of the first porous body 51, and the thickness of the second porous body 61 are not particularly limited. The pressure is appropriately adjusted so that the pressure loss does not become too large inside the two-fluid sprayer 2 and the function of the first porous body 51 and the function of the second porous body 61 can be exhibited.

  As shown in FIG. 4, the bubble generating unit 5 includes a gap 50 provided between the first porous body 51 and the second porous body 61. As described above, since the gap 50 is provided between the first porous body 51 and the second porous body 61, it is possible to stably generate a plurality of bubbles having intermediate sizes in the bubble generation unit 5. Can do.

  The size L1 of the gap 50 in the axial direction of the two-fluid sprayer 2 is not particularly limited. In the specific example shown in FIG. 4, the size L <b> 1 of the gap 50 is larger than the thickness of the first porous body 51, but is not limited thereto. The size L1 of the gap 50 is preferably larger than the diameter of bubbles generated in the bubble generation unit 5 (the diameter of bubbles having an intermediate size that allows the bubbles to be refined in the bubble refinement unit 6).

  The bubble refining unit 6 includes a gap 60 provided between the second porous body 61 and the spray unit 7. Thus, since the clearance gap 60 is provided between the 2nd porous body 61 and the spraying part 7, in the bubble refinement | miniaturization part 6, a several fine bubble can be produced | generated stably.

  The size L2 of the gap 60 in the axial direction of the two-fluid sprayer 2 is not particularly limited. In the specific example shown in FIG. 4, the size L <b> 2 of the gap 60 is larger than the thickness of the second porous body 61, but is not limited thereto. The size L2 of the gap 60 is preferably larger than the diameter of the bubbles generated in the bubble refining unit 6.

[Second Embodiment]
FIG. 5 is a sectional view showing a two-fluid sprayer 2 according to the second embodiment of the present invention. The two-fluid sprayer 2 according to the second embodiment is different from the first embodiment in the structure of the bubble refinement unit 6, and the other structures are the same as those in the first embodiment. As shown in FIG. 5, in the two-fluid sprayer 2 of the second embodiment, the bubble generation unit 5 has a porous body 51, and the bubble refinement unit 6 has an ultrasonic wave application unit 62. The porous body 51 in the second embodiment is the same as the first porous body 51 in the first embodiment.

  The ultrasonic wave imparting unit 62 has a function of imparting ultrasonic waves to the gas-liquid two-phase flow after passing through the bubble generating unit 5. As shown in FIG. 5, the ultrasonic wave application unit 62 includes an ultrasonic transducer 62 a at the tip. In the present embodiment, the ultrasonic transducer 62a is inserted into the case 8 and arranged so as to be in contact with the gas-liquid two-phase flow in the case 8, but the present invention is not limited to this. The ultrasonic transducer 62a may be disposed so as to be in contact with or close to the outer surface of the case 8 of the two-fluid sprayer 2, for example. When the vibration of the ultrasonic vibrator 62a is transmitted to the gas-liquid two-phase flow inside the case 8, the bubbles are refined in the bubble refinement unit 6.

  The ultrasonic transducer 62 a is disposed downstream of the porous body 51 of the bubble generating unit 5 and at a distance L1 from the porous body 51 in the axial direction of the two-fluid sprayer 2. Accordingly, the gap 50 as described in the first embodiment is provided in the bubble generation unit 5.

  Also in the second embodiment, the bubble refining unit 6 includes a gap 60 provided between the ultrasonic transducer 62 a of the ultrasonic wave application unit 62 and the spray unit 7. As described above, since the gap 60 is provided between the ultrasonic wave application unit 62 and the spray unit 7, a plurality of fine bubbles can be stably generated in the bubble refinement unit 6. Since the preferable feature of the size L2 of the gap 60 in the axial direction of the two-fluid sprayer 2 is the same as that of the first embodiment, the description thereof is omitted.

[Third Embodiment]
FIG. 6 is a sectional view showing a two-fluid sprayer 2 according to the third embodiment of the present invention. In the two-fluid sprayer 2 of the third embodiment, the structure of the bubble generating unit 5 is different from that of the first embodiment, and other structures are the same as those of the first embodiment. As shown in FIG. 6, in the two-fluid sprayer 2 of the third embodiment, the bubble generation unit 5 has a swirl flow imparting unit 52, and the bubble refinement unit 6 has a porous body 61. The porous body 61 in the third embodiment is the same as the second porous body 61 in the first embodiment.

  The swirl flow imparting unit 52 has a function of imparting a swirl flow to the gas-liquid two-phase flow generated in the gas-liquid mixing unit 3 (the gas-liquid two-phase flow having a mass flow ratio GLR of 0.04 or more). Have. The swirl flow imparting unit 52 generates bubbles by forming a flow that swirls around the axis of the two-fluid sprayer 2, for example.

  In the specific example shown in FIG. 6, the swirl flow imparting portion 52 has a spiral (female screw-like) groove 52 a formed along the inner peripheral surface of the case 8. The groove 52 a is a portion between adjacent convex portions 52 b arranged in the axial direction of the two-fluid sprayer 2. The convex part 52b protrudes toward the central axis of the two-fluid sprayer 2 in a direction intersecting in the axial direction from the inner peripheral surface of the case 8 (for example, a direction orthogonal to the axial direction).

  In the third embodiment, since the groove 52 a of the swirl flow imparting unit 52 is spiral, the gas-liquid two-phase flow generated in the gas-liquid mixing unit 3 becomes an annular flow upstream of the bubble generating unit 5. Even if it flows, it turns into a swirl flow by flowing along the groove 52a. The gas-liquid two-phase flow is swirled to disturb the flow and generate bubbles.

  As shown in FIG. 6, the bubble generating unit 5 includes a gap 50 provided between the swirl flow imparting unit 52 and the porous body 61. As described above, since the gap 50 is provided between the swirl flow imparting unit 52 and the porous body 61, a plurality of bubbles having an intermediate size can be stably generated in the bubble generating unit 5. In the third embodiment, the size L <b> 1 of the gap 50 in the axial direction of the two-fluid sprayer 2 is the distance from the downstream end of the swirl flow imparting unit 52 to the porous body 61. Since the preferable feature of the size L1 of the gap 50 is the same as that of the first embodiment, the description thereof is omitted.

[Fourth embodiment]
FIG. 7 is a sectional view showing a two-fluid sprayer 2 according to the fourth embodiment of the present invention. As shown in FIG. 7, in the two-fluid sprayer 2 of the fourth embodiment, the structure of the bubble generation unit 5 is the same as that of the third embodiment, and the structure of the bubble refinement unit 6 is the same as that of the second embodiment. . That is, in the two-fluid sprayer 2 of the fourth embodiment, the bubble generating unit 5 has a swirl flow providing unit 52, and the bubble refining unit 6 has an ultrasonic applying unit 62. Since the structure of the swirling flow imparting unit 52 and the structure of the ultrasonic imparting unit 62 are as described in the second embodiment and the third embodiment, description thereof will be omitted.

[Fifth embodiment]
FIG. 8 is a sectional view showing a two-fluid sprayer 2 according to the fifth embodiment of the present invention. The two-fluid sprayer 2 of the fifth embodiment is different from the first embodiment in the structure of the bubble generating unit 5, and the other structures are the same as those in the first embodiment. As shown in FIG. 8, in the two-fluid sprayer 2 of the fifth embodiment, the bubble generating unit 5 has a plate-like portion 53 that is an example of a resistor, and the bubble refining unit 6 has a porous body 61. The porous body 61 in the fifth embodiment is the same as the second porous body 61 in the first embodiment.

  The plate-like portion 53 becomes a resistance to the flow of the gas-liquid two-phase flow (the gas-liquid two-phase flow having a mass flow ratio GLR of 0.04 or more) generated in the gas-liquid mixing portion 3 It has a function of generating bubbles in the gas-liquid two-phase flow.

  In the specific example shown in FIG. 8, the plate-like portion 53 includes a diaphragm 53b and a support portion 53a that supports the diaphragm 53b. One end of the diaphragm 53b is supported by the support portion 53a so as to be rotatable (swingable) about the support portion 53a. The support portion 53a is fixed to the case 8 by a fixing member (not shown).

  In the fifth embodiment, when the diaphragm 53 b swings under the force of water flow, the gas-liquid two-phase flow generated in the gas-liquid mixing unit 3 becomes an annular flow upstream of the bubble generation unit 5. Even if this occurs, it collides with the diaphragm 53b and the flow is disturbed to generate bubbles.

  As shown in FIG. 8, the bubble generating part 5 includes a gap 50 provided between the plate-like part 53 and the porous body 61. As described above, since the gap 50 is provided between the plate-like portion 53 and the porous body 61, a plurality of bubbles having intermediate sizes can be stably generated in the bubble generating portion 5. Since the size L1 of the gap 50 in the axial direction of the two-fluid sprayer 2 is the same as that of the first embodiment, the description thereof is omitted.

[Sixth Embodiment]
FIG. 9 is a sectional view showing a two-fluid sprayer 2 according to the sixth embodiment of the present invention. As shown in FIG. 9, in the two-fluid sprayer 2 of the sixth embodiment, the structure of the bubble generation unit 5 is the same as that of the sixth embodiment, and the structure of the bubble refinement unit 6 is the same as that of the second embodiment. . That is, in the two-fluid sprayer 2 of the sixth embodiment, the bubble generating unit 5 has a plate-like portion 53, and the bubble refining unit 6 has an ultrasonic wave applying unit 62. Since the structure of the plate-like part 53 and the structure of the ultrasonic wave application part 62 are as described in the second embodiment and the sixth embodiment, description thereof will be omitted.

[Seventh Embodiment]
FIG. 10 is a sectional view showing a two-fluid sprayer 2 according to the seventh embodiment of the present invention. The two-fluid sprayer 2 according to the seventh embodiment is different from the first embodiment in the structure of the bubble generation unit 5, and the other structures are the same as those in the first embodiment. As shown in FIG. 10, in the two-fluid sprayer 2 of the seventh embodiment, the bubble generating unit 5 has a stepped portion 54 that is an example of a resistor, and the bubble refining unit 6 has a porous body 61. The porous body 61 in the seventh embodiment is the same as the second porous body 61 in the first embodiment.

  The step portion 54 becomes the resistance of the flow of the gas-liquid two-phase flow generated in the gas-liquid mixing unit 3 (the gas-liquid two-phase flow having a mass flow ratio GLR of 0.04 or more). It has a function of generating bubbles in a gas-liquid two-phase flow. The step portion 54 is a member such as a plate or a rod that is disposed at a position that provides resistance to the flow of the gas-liquid two-phase flow.

  FIG. 11A is a cross-sectional view showing an example of a stepped portion 54 as a resistor in the two-fluid sprayer of the seventh embodiment, and FIG. 11B is a resistor in the two-fluid sprayer of the seventh embodiment. It is sectional drawing which shows the other example of the level | step-difference part 54 as. In the form shown in FIG. 11A, the stepped portion 54 is a ring-shaped member having a through hole at the center, and a step is formed between the inner peripheral surface of the case 8. In the form shown in FIG. 11B, the bubble generation unit 5 has a plurality of step portions 54. Each of the plurality of stepped portions 54 is a plate-like member that rises from the inner peripheral surface of the case 8 toward the central axis of the case 8, and forms a step between the inner peripheral surface of the case 8. The plurality of step portions 54 are arranged at intervals in the circumferential direction.

  In the seventh embodiment, even if the gas-liquid two-phase flow generated in the gas-liquid mixing unit 3 is an annular flow upstream of the bubble generating unit 5, it collides with the stepped part 54 and the flow is disturbed. And bubbles are generated.

  As shown in FIG. 10, the bubble generating unit 5 includes a gap 50 provided between the stepped portion 54 and the porous body 61. As described above, since the gap 50 is provided between the stepped portion 54 and the porous body 61, a plurality of bubbles having intermediate sizes can be stably generated in the bubble generating unit 5. Since the size L1 of the gap 50 in the axial direction of the two-fluid sprayer 2 is the same as that of the first embodiment, the description thereof is omitted.

[Eighth Embodiment]
FIG. 12 is a sectional view showing a two-fluid sprayer 2 according to the eighth embodiment of the present invention. As shown in FIG. 12, in the two-fluid sprayer 2 of the eighth embodiment, the structure of the bubble generation unit 5 is the same as that of the seventh embodiment, and the structure of the bubble refinement unit 6 is the same as that of the second embodiment. . That is, in the two-fluid sprayer 2 of the eighth embodiment, the bubble generating unit 5 has a stepped portion 54, and the bubble refining unit 6 has an ultrasonic wave applying unit 62. Since the structure of the step part 54 and the structure of the ultrasonic wave application part 62 are as described in the second embodiment and the seventh embodiment, description thereof will be omitted.

[Summary of Embodiment]
As described above, the two-fluid sprayer 2 according to the embodiment includes the bubble generation unit 5 that generates a bubble by passing a gas-liquid two-phase flow having a mass flow rate ratio GLR of 0.04 or more, and a bubble. A spray having a bubble refining unit 6 for refining bubbles included in the gas-liquid two-phase flow that has passed through the generation unit 5 and a jet hole 70 for ejecting the gas-liquid two-phase flow after having passed through the bubble refining unit 6 Part 7.

  Inside the two-fluid sprayer 2 to which air and water are supplied so as to have a high GLR (that is, GLR ≧ 0.04), the flow mode of the gas-liquid two-phase flow tends to be an annular flow. Therefore, in the above-described embodiment, the gas-liquid two-phase flow in which the flow mode is an annular flow inside the two-fluid sprayer 2 and the bubble generating unit 5 before reaching the ejection hole 70 inside the two-fluid sprayer. In the bubble refining unit 6, the bubbles are changed stepwise into a gas-liquid two-phase flow. In short, as shown in FIGS. 4 to 10 and 12, in the annular flow region 4, the air G is a columnar mass inside the annular water L, and this columnar mass of air G is a bubble. In the production | generation part 5 and the bubble refinement | miniaturization part 6, it decomposes | disassembles into a fine bubble in steps. The bubble generating unit 5 decomposes the column-shaped mass of air G in the annular flow into a plurality of large bubbles, and the bubble refining unit 6 decomposes the large bubbles into a plurality of fine bubbles.

  That is, in the above embodiment, a gas-liquid two-phase flow whose flow pattern is an annular flow generates bubbles by passing through the bubble generation unit 5, and is included in the gas-liquid two-phase flow that has passed through the bubble generation unit 5. The bubble to be generated is refined in the bubble refinement unit 6. In this way, the gas-liquid two-phase flow whose flow mode is an annular flow is a gas-liquid two-phase flow in which fine bubbles are dispersed by the bubbles being refined stepwise in the bubble generation unit 5 and the bubble refinement unit 6. It changes into a flow (a gas-liquid two-phase flow in which the flow mode is a bubbling flow or a gas-liquid two-phase flow in a flow state close thereto). A gas-liquid two-phase flow in which fine bubbles are dispersed is ejected from the ejection hole 70 in the spray section 7. At this time, water droplets are atomized by the force that fine bubbles burst at or near the ejection hole 70. From the above, in the above embodiment, water droplets can be atomized even at a pressure of tap water or a pressure close thereto.

  In addition, it is not a stepwise means using the bubble generating unit 5 and the bubble refining unit 6 as in the above embodiment, but directly changing the annular flow into the bubble flow or a flow state close thereto by a single means. Have difficulty. On the other hand, as in the above-described embodiment, by generating in advance in the bubble generation unit 5 bubbles having an intermediate size that allows the bubbles to be reduced in the bubble refinement unit 6, the bubbles are generated from the annular flow. It is possible to effectively generate a gas-liquid two-phase flow in a flow state or a flow state close thereto.

  In addition, for example, if an annular flow is changed to a bubble flow or a flow state close thereto with a single porous body, there is a problem that the pressure loss when passing through the porous body becomes too large. In the above-described embodiment that is miniaturized, such an increase in pressure loss can be suppressed.

  In the first to eighth embodiments, in the two-fluid sprayer 2, the bubble refining unit 6 passes through the porous body 61 through which the gas-liquid two-phase flow after passing through the bubble generation unit 5 passes or the bubble generation unit 5. It has the ultrasonic application part 62 which provides an ultrasonic wave to the gas-liquid two-phase flow after doing.

  In this configuration, the fine bubbles are dispersed by adopting at least one of the porous body 61 and the ultrasonic wave imparting portion 62 as a means for further miniaturizing the bubbles having an intermediate size generated in the bubble generating portion 5. The gas-liquid two-phase flow thus made can be stably supplied to the ejection holes 70 of the spray section 7.

  In the first to eighth embodiments, in the two-fluid sprayer 2, the bubble generating unit 5 includes a porous body 51 through which a gas-liquid two-phase flow having a mass flow ratio (GLR) of 0.04 or more passes, and a mass flow ratio of 0 A swirl flow imparting portion 52 for imparting a swirl flow to a gas-liquid two-phase flow of 0.04 or more, a plate-like portion 53 serving as a resistance to the flow of the gas-liquid two-phase flow having a mass flow ratio (GLR) of 0.04 or more, or It has a stepped portion 54 that serves as a flow resistance of the gas-liquid two-phase flow with a mass flow ratio (GLR) of 0.04 or more.

  The bubble generation unit 5 only needs to be capable of generating bubbles having an intermediate size that allows the bubble refinement unit 6 to refine the bubbles. Therefore, as the bubble generation unit 5, at least one of the porous body 51, the swirl flow imparting unit 52, the plate-like portion 53, and the stepped portion 54 can be adopted as described above.

  In the first embodiment, in the two-fluid sprayer 2, the bubble generation unit 5 includes the first porous body 51 through which a gas-liquid two-phase flow having a mass flow rate ratio (GLR) of 0.04 or more passes, The gasifying section 6 has a second porous body 61 through which the gas-liquid two-phase flow after passing through the bubble generating section 5 passes and which is finer than the first porous body 51.

  In this configuration, bubbles having an intermediate size that can be reduced in size in the bubble refining unit 6 are generated in the first porous body 51, and the bubbles having the intermediate size are generated in the second porous body 61. Further refinement can be achieved.

  In the first embodiment, in the two-fluid sprayer 2, the bubble generating unit 5 includes a gap 50 provided between the first porous body 51 and the second porous body 61.

  In this configuration, since the gap 50 is provided between the first porous body 51 and the second porous body 61, a plurality of bubbles having intermediate sizes can be stably generated.

  The outdoor unit 10 of the air conditioning apparatus according to the above embodiment includes a heat exchanger 11 and a two-fluid sprayer 2 that sprays water onto the air toward the heat exchanger 11.

  In this configuration, since the atomized water droplets can be sprayed in the two-fluid sprayer 2, the air toward the heat exchanger is cooled by the sprayed water, and as a result, necessary for the operation of the outdoor unit of the air conditioner Input can be reduced. Further, in this configuration, since the water droplets can be atomized at the pressure of tap water or a pressure close thereto in the two-fluid sprayer 2, for example, means for increasing the water pressure (means for increasing the spray pressure) is not provided separately. May be.

[Other variations]
As mentioned above, although embodiment of this invention was described, this invention is not limited to these embodiment, A various change, improvement, etc. are possible in the range which does not deviate from the meaning.

  FIG. 13 is a schematic diagram illustrating a first modification of the outdoor unit 10. FIG. 14 is a schematic diagram illustrating a second modification of the outdoor unit 10. FIG. 15 is a schematic diagram illustrating a third modification of the outdoor unit 10. The two-fluid sprayer 2, the heat exchanger 11, and the blower 12 may be arranged as in Modification 1 shown in FIG. In the arrangement example shown in FIG. 13, the blower 12 is provided at a position facing the heat exchanger 11 in the horizontal direction. Such a form is employed in, for example, a small outdoor unit for home use, but is not limited thereto. Further, as in Modification 2 shown in FIG. 14, the two-fluid sprayer 2 may be arranged so as to spray water droplets toward the heat exchanger 11. Moreover, like the modification 3 shown in FIG. 15, the two-fluid sprayer 2 may be arrange | positioned so that a water droplet may be sprayed below.

  In the said embodiment, although the case where the outdoor unit 10 was provided with the some two-fluid sprayer 2 was illustrated, it is not restricted to this, The outdoor unit 10 may be provided with the one two-fluid sprayer 2 only.

  In the said embodiment, although the case where the two fluid sprayer 2 was applied to the outdoor unit 10 of an air conditioning apparatus was illustrated, it is not restricted to this. The two-fluid sprayer 2 can be applied to other uses other than the outdoor unit. Specifically, the two-fluid sprayer 2 can be applied to, for example, a use for humidifying a room (for example, a use for humidifying the inside of a plant factory).

  In the above-described embodiment, the bubble generating unit 5 is exemplified by any one of the porous body 51, the swirl flow imparting unit 52, the plate-like unit 53, and the stepped unit 54, but is not limited thereto. The bubble generation unit 5 may include two or more of the porous body 51, the swirl flow imparting unit 52, the plate-like unit 53, and the stepped unit 54.

  In the said embodiment, although the bubble refinement | miniaturization part 6 illustrated the case where it had any one of the porous body 61 and the ultrasonic provision part 62, it is not restricted to this. The bubble refinement unit 6 may include both the porous body 61 and the ultrasonic wave application unit 62.

  In the above-described embodiment, the bubble generation unit 5 is exemplified as including the gap 50 provided between the first porous body 51 and the second porous body 61, but is not limited thereto. The first porous body 51 and the second porous body 61 may be in contact with each other without a gap. Moreover, in the said embodiment, although the bubble refinement | miniaturization part 6 illustrated the case where the clearance gap 60 provided between the 2nd porous body 61 and the spray part 7 was illustrated, it is not restricted to this, The clearance gap 60 is abbreviate | omitted. May be. Similarly, in the cases other than the porous bodies 51 and 61, the bubble generating unit 5 may not have the gap 50, and the bubble refining unit 6 may not have the gap 60.

DESCRIPTION OF SYMBOLS 1 Spraying mechanism 2 Two-fluid sprayer 3 Gas-liquid mixing part 5 Bubble generation part 6 Bubble refinement part 7 Spraying part 10 Air conditioner outdoor unit 11 Heat exchanger 50 Crevice 51 Porous body 52 Swirling flow grant part 53 Plate-like part 54 Step part 60 Clearance 61 Porous body 62 Ultrasonic wave application part 70 Ejection hole GLR Ratio of mass flow rate of air and water

Claims (6)

A bubble generator (5) that generates a bubble by passing a gas-liquid two-phase flow of air and water;
A bubble refining section (6) for refining bubbles included in the gas-liquid two-phase flow that has passed through the bubble generating section (5);
A two-fluid sprayer comprising: a spray section (7) having a spray hole (70) for spraying a gas-liquid two-phase flow after passing through the bubble refinement section (6).   The bubble refinement section (6) includes a porous body (61) through which the gas-liquid two-phase flow after passing through the bubble generation section (5) passes, and an air after passing through the bubble generation section (5). The two-fluid sprayer according to claim 1, comprising at least one of an ultrasonic wave application unit (62) for applying ultrasonic waves to the liquid two-phase flow.   The bubble generating unit (5) includes a porous body (51) through which the gas-liquid two-phase flow passes, a swirling flow applying unit (52) that applies a swirling flow to the gas-liquid two-phase flow, and the gas-liquid two-phase flow The two-fluid sprayer according to claim 1 or 2, comprising at least one of the resistors (53, 54) that resist the flow of the flow. The bubble generating part (5) has a first porous body (51) through which the gas-liquid two-phase flow passes,
The bubble refinement part (6) is a part through which the gas-liquid two-phase flow after passing through the bubble generation part (5) passes, and is finer than the first porous body (51). The two-fluid sprayer according to claim 1, wherein the two-fluid sprayer has a porous body (61).   The two-fluid according to claim 4, wherein the bubble generating part (5) includes a gap (50) provided between the first porous body (51) and the second porous body (61). Nebulizer. A heat exchanger (11);
An outdoor unit of an air conditioner, comprising: the two-fluid sprayer (2) according to any one of claims 1 to 5, wherein water is sprayed onto the air toward the heat exchanger (11).

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