WO2013046689A1

WO2013046689A1 - Outdoor unit for air conditioning device

Info

Publication number: WO2013046689A1
Application number: PCT/JP2012/006183
Authority: WO
Inventors: 洋楊; 西村　忠史; 衛奥本; 柴田　豊
Original assignee: ダイキン工業株式会社
Priority date: 2011-09-30
Filing date: 2012-09-27
Publication date: 2013-04-04
Also published as: EP2767767A1; CN103857964B; US20140263765A1; EP2767767B1; JP2013083431A; EP2767767A4; CN103857964A; JP5310917B2; ES2747474T3

Abstract

The spray nozzle (21) of an outdoor unit (11) is provided with: an air guide section (30) through which air flows; a water guide section (40) through which water flows and which causes the air having flowed through the air guide section (30) to flow into water to form water which contains a large number of bubbles; and a spray section (51) which is located downstream of the water guide section (40) in the direction of water flow and which sprays to the outside the water having been formed by the water guide section (40) and containing a large number of bubbles.

Description

Air conditioner outdoor unit

The present invention relates to an outdoor unit of an air conditioner.

Conventionally, an outdoor unit of an air conditioner equipped with a spray device that sprays water on a heat exchanger from a spray nozzle to assistly cool the heat exchanger is known. In this outdoor unit, since the heat exchanger is cooled by the sprayed water, an effect of reducing power (power consumption) required for the air conditioner can be obtained. In this type of air conditioner, the heat exchanger may corrode when droplets adhere to the surface of the heat exchanger.

Patent Document 1 discloses an outdoor unit provided with a fine mist generating nozzle. The fine mist generating nozzle is provided at a position upstream of the heat exchanger and away from the heat exchanger, and generates fine mist having a particle size of 10 μm or less by simultaneously injecting air and water. This Patent Document 1 describes that the fine mist ejected from the fine mist generating nozzle evaporates before reaching the heat exchanger, so that droplets can be prevented from adhering to the heat exchanger. .

JP 2008-128500 A

However, in the conventional two-fluid nozzle that simultaneously injects air and water in the spray hole of the spray nozzle, the droplets are refined by applying shearing force to the water with the pressure of the air. A lot of power is needed. Therefore, the power reduction effect as the whole air conditioning apparatus may not be sufficiently obtained.

An object of the present invention is to provide an outdoor unit that can reduce the power of the entire air conditioner while suppressing corrosion of the heat exchanger.

An outdoor unit of an air conditioner according to the present invention includes a heat exchanger, and a spray nozzle that sprays water onto the air toward the heat exchanger, the spray nozzle including an air guide unit through which air flows, and water A water guide portion in which air flowing through the air guide portion flows into the water to form water containing a large number of bubbles, and is located downstream of the water guide portion in the water flow direction, A spray unit that sprays water containing a large number of bubbles formed in the water guide unit to the outside.

It is the schematic which shows the outdoor unit which concerns on 1st Embodiment of this invention. It is a perspective view which shows the arrangement | positioning state of the heat exchanger and spray nozzle in the said outdoor unit. It is sectional drawing of the said spray nozzle. It is sectional drawing of the spray nozzle in the outdoor unit which concerns on 2nd Embodiment of this invention. It is sectional drawing of the spray nozzle in the outdoor unit which concerns on 3rd Embodiment of this invention. (A) is a perspective view which shows the air guide tube of the spray nozzle in 3rd Embodiment, (B) is a perspective view which shows the modification 1 of an air guide tube, (C) is an air guide tube It is a perspective view which shows the modification 2 of. It is the schematic which shows the outdoor unit which concerns on other embodiment of this invention. It is a perspective view which shows the arrangement | positioning state of the heat exchanger and spray nozzle in the said outdoor unit. It is the schematic for demonstrating the example of arrangement | positioning of the spray nozzle with respect to the said heat exchanger. It is the schematic which shows the outdoor unit which concerns on other embodiment of this invention. It is a figure for demonstrating the relationship between the wind speed distribution of the flow of the air which goes to a heat exchanger in the said outdoor unit, and the distance from each spray nozzle to each site | part of a heat exchanger. (A) is the schematic for demonstrating the modification 1 of a charging mechanism, (B) is an expansion perspective view for demonstrating a spray nozzle and an induction electrode. It is the schematic for demonstrating the modification 2 of a charging mechanism.

<First Embodiment>
Hereinafter, an outdoor unit according to a first embodiment of the present invention will be described with reference to the drawings.

The outdoor unit 11 according to the first embodiment is used in an air conditioner. This air conditioner includes an outdoor unit 11 shown in FIG. 1, an unillustrated indoor unit, and an unillustrated refrigerant pipe connecting them. As shown in FIG. 1, the outdoor unit 11 includes a case 12, a heat exchanger 13, a blower 14, a compressor 15, a spray device 20, an outside air temperature sensor 18, a control unit 16, and the like. The heat exchanger 13, the blower 14, the compressor 15, and the control unit 16 are disposed in the case 12. The blower 14, the compressor 15, and the spray device 20 are controlled by the control unit 16. The compressor 15 and the heat exchanger 13 are provided in the refrigerant circuit of the air conditioner.

Examples of the heat exchanger 13 include, but are not limited to, a cross fin coil type heat exchanger. The cross fin coil heat exchanger includes a heat transfer tube and a number of plate fins through which the heat transfer tube passes. The refrigerant flows inside the heat transfer tube, and the outside air flows between the plate fins. As a result, the refrigerant and the outside air exchange heat.

As shown in FIG. 2, the heat exchanger 13 extends upward from the bottom plate of the case 12 and has a substantially U shape in plan view. That is, the heat exchanger 13 is erected with respect to the installation surface (horizontal plane) of the outdoor unit 11. Of the four side plates of the case 12, three side plates facing the heat exchanger 13 are provided with suction ports (not shown) for sucking outside air into the case 12. Further, the top plate of the case 12 is provided with an air outlet 17 for blowing the air in the case 12 to the outside.

As the blower (fan) 14, a centrifugal blower, an axial blower, a mixed flow blower, or the like can be used. The blower 14 includes an impeller 14a and a motor (not shown) that rotates the impeller 14a. The blower 14 is disposed in the outdoor unit 11 on the inner side in the horizontal direction than the heat exchanger 13 and on the upper side of the heat exchanger 13. Specifically, the air blower 14 is provided in the upper part in the case 12 as shown in FIG. 1, and is arrange | positioned directly under the blower outlet 17 shown in FIG. And the air blower 14 discharges | emits the air after flowing in the inside of the outdoor unit 11 (case 12) and heat-exchanging with the heat exchanger 13 from the outdoor unit 11 (case 12) outside. That is, the blower 14 is located downstream of the heat exchanger 13 in the air flow direction.

During operation of the air conditioner, power is applied to the compressor 15 so that the refrigerant circulates in the refrigerant circuit between the outdoor unit 11 and the indoor unit, and power is applied to the motor of the blower 14. The impeller 14a rotates and outside air is sucked into the case 12 from the suction port. As described above, the outside air sucked into the case 12 exchanges heat with the refrigerant in the heat exchanger 13 and then blows out to the outside of the case 12 through the air outlet 17. Specifically, for example, during cooling operation, the outside air sucked into the case 12 exchanges heat with a high-temperature and high-pressure refrigerant flowing in the heat transfer tube via the heat transfer tube in the heat exchanger 13 functioning as a condenser. To do. That is, the outside air cools the heat transfer tubes and the refrigerant of the heat exchanger 13. Thereby, the refrigerant | coolant which flows through the said heat exchanger tube is cooled and condensed.

Next, the spray device 20 will be described. The spraying device 20 can cool the outside air toward the heat exchanger 13 during the cooling operation. That is, the spray device 20 reduces the temperature of the outside air toward the heat exchanger 13. Thereby, the effect which cools the heat exchanger tube and the refrigerant | coolant of the heat exchanger 13 can be heightened. Thus, the spraying device 20 can enhance the cooling capacity of the air conditioner by cooling the heat exchanger 13 and the refrigerant in an auxiliary manner.

1 to 3, the spray device 20 includes a plurality of spray nozzles 21, a water supply mechanism 60, an air supply mechanism 70, and a charging mechanism 80 as a charging unit.

The plurality of spray nozzles 21 are supported by a side plate of the case 12 or a support member (not shown) separately provided on the case 12. Each spray nozzle 21 is located upstream of the heat exchanger 13 in the direction of the airflow formed when the impeller 14a of the blower 14 rotates. In the present embodiment, each spray nozzle 21 is disposed outside and above the heat exchanger 13 in the outdoor unit 11 and is disposed in such a posture that droplets (water droplets in the present embodiment) are sprayed downward. Has been. That is, each spray nozzle 21 is arranged so that its axial direction is directed in a direction substantially orthogonal to the flow of outside air (air) in the substantially horizontal direction toward the heat exchanger 13. The water droplets sprayed from each spray nozzle 21 travel downward while diffusing radially, and move toward the heat exchanger 13 by the air flow. All or most of the water droplets are vaporized before reaching the heat exchanger 13.

In addition, since each spray nozzle 21 sprays water droplets downward, even when a large water droplet that is difficult to vaporize is sprayed, the water droplet is caused by the external air depending on the sprayed momentum and the gravity applied to the water droplet. It crosses down and falls downward (such as the installation surface of the outdoor unit 11). This prevents the large water droplets from adhering to the heat exchanger 13 and getting wet.

As shown in FIG. 2, the plurality of spray nozzles 21 are provided on the three

side plates

12 a, 12 b, and 12 c facing the heat exchanger 13 so that the cooling effect by the spray device 20 is exerted over almost the entire heat exchanger 13. , Are spaced apart from each other in the horizontal direction. Specifically, based on the range in which water droplets sprayed from each spray nozzle 21 diffuse, that is, the range in which the outside air toward the heat exchanger 13 is cooled by each spray nozzle 21, the plurality of spray nozzles 21 are arranged in the horizontal direction. For example, with an interval of about several tens of centimeters.

In this embodiment, the range (horizontal range) in which water droplets diffuse from each spray nozzle 21 is, for example, about 50 cm, the width of the side plate 12a is, for example, about 100 cm, and the width of the

side plates

12b, 12c is about 30 cm. A case is illustrated. Then, two spray nozzles 21 are arranged on the side plate 12a with a space in the horizontal direction, and one spray nozzle 21 is arranged on each of the side plate 12b and the side plate 12c. Moreover, the height position of each spray nozzle 21 is the same.

The water supply mechanism 60 includes a liquid feed pipe 61 and a liquid feed pump 62. The liquid feed pipe 61 connects a water supply source (not shown) such as water supply and each spray nozzle 21. The liquid feed pipe 61 includes a conductive pipe 61a (a metal pipe 61a in the present embodiment) located on the upstream side of the flow of water and an insulating pipe 61b (a resin pipe 61b in the present embodiment) located on the downstream side. Including. The liquid feed pump 62 sends water to each spray nozzle 21 through the liquid feed pipe 61.

The air supply mechanism 70 includes an air feed pump 72 such as a compressor and an air feed pipe 71, for example. The air feed pipe 71 connects the air feed pump 72 and each spray nozzle 21.

The charging mechanism 80 includes a charging power source (high voltage power source) 81, wirings 82 and 83, and an output adjustment unit 84. The wiring 82 connects the positive electrode of the charging power supply 81 and the tip of each spray nozzle 21. The wiring 83 connects the negative electrode of the charging power supply 81 and the conductive pipe 61 a of the liquid feeding pipe 61. Thereby, the water (each water droplet) sprayed from the spray nozzle 21 is charged positively. The positive electrode of the charging power supply 81 is grounded so that the spray nozzle 21 is at the ground potential. The resin pipe 61 b is made of a synthetic resin material having electrical insulation, and is located on the downstream side of the connection portion between the wiring 83 and the liquid feed pipe 61. The output adjustment unit 84 adjusts the output of the charging power supply 81.

FIG. 1 shows a state in which the water supply mechanism 60, the air supply mechanism 70, and the charging mechanism 80 are connected to one spray nozzle 21, and illustration of the other spray nozzles 21 is omitted. The water supply mechanism 60, the air supply mechanism 70, and the charging mechanism 80 are connected to the other spray nozzles 21 in the same manner as the connection state shown in FIG. Specifically, for example, the liquid supply pipe 61 of the water supply mechanism 60 is branched in the middle and connected to the plurality of spray nozzles 21, and the air supply pipe 71 of the air supply mechanism 70 is branched in the middle of the plurality of spray nozzles 21. Connected to the spray nozzle 21. The plurality of spray nozzles 21 are connected to the charging power supply 81 of the charging mechanism 80 in parallel, for example.

The outside temperature sensor 18 can detect the outside temperature. For example, when the outside air temperature sensor 18 detects that the outside air temperature has reached a predetermined temperature or more, the control unit 16 determines that the cooling operation load has exceeded a predetermined level, and the liquid feed pump 62. And the spraying of water is started from the some spray nozzle 21 by controlling the air feed pump 72. For example, the control unit 16 controls the liquid feed pump 62 and the air feed pump 72 so that water is sprayed from each spray nozzle 21 continuously or intermittently for a predetermined time. Further, the control unit 16 controls the output adjusting unit 84 of the charging mechanism 80 to apply a voltage to each spray nozzle 21 by the charging power supply 81 in order to charge the water droplet sprayed from each spray nozzle 21.

Next, the structure of the plurality of spray nozzles 21 will be described in detail. In the present embodiment, the plurality of spray nozzles 21 have the same structure. FIG. 3 is a cross-sectional view showing one of the plurality of spray nozzles 21. As shown in FIG. 3, the spray nozzle 21 has a body portion 10 and an orifice portion 50 located downstream of the body portion 10 (downstream side in the water flow direction).

The barrel portion 10 has a function of guiding water supplied from an unillustrated water supply source to the orifice portion 50 and a function of mixing fine bubbles in the water supplied to the barrel portion 10. The trunk portion 10 of the present embodiment extends in the vertical direction (up and down direction), and the orifice portion 50 is disposed on the lower side thereof. That is, the trunk | drum 10 of this embodiment guides the water supplied from the unillustrated water supply source toward the downward direction. The orifice unit 50 receives water mixed with bubbles in the body unit 10 and guided to the orifice unit 50, stably sends the bubbles mixed with water to the outside of the spray nozzle 21, and has a pressure difference before and after the orifice. It has a function of expanding the air bubbles coming out of the orifices to make the water droplets fine and spraying.

The barrel 10 has a cylindrical outer shape that is longer in the axial direction than in the radial direction. That is, the trunk portion 10 has a cylindrical outer shape extending in the vertical direction. The body portion 10 includes an air guide tube (outer cylindrical portion) 31 having a tube wall formed in a tube shape, and a water guide tube having a tube wall formed in a tube shape and disposed inside the air guide tube 31. (Inner cylindrical part) 41. That is, the water guide pipe 41 is inserted into the air guide pipe 31.

The water guide tube 41 is provided with a plurality of air introduction holes 43a that penetrate the tube wall in the thickness direction. An air supply portion 32 for supplying air to the air flow path F 1 is provided on the tube wall of the air guide tube 31. The air supply part 32 has a cylindrical shape in which an air supply hole 32a communicating with the air flow path F1 is formed. 1 is connected to the air supply unit 32.

The axial direction of the air guide tube 31 and the axial direction of the water guide tube 41 are the same. Further, these axes are located on substantially the same straight line. That is, the air guide pipe 31 and the water guide pipe 41 have pipe shapes that extend in the vertical direction, and are arranged so that their center axes coincide or substantially coincide. The water guide tube 41 has a cylindrical shape with an inner diameter D1 and an outer diameter D2. The air guide tube 31 has a cylindrical shape having an inner diameter D3, an outer diameter D4, and a length L1. The inner diameter D3 of the air guide tube 31 is larger than the outer diameter D2 of the water guide tube 41. The inner peripheral surface of the air guide tube 31 and the outer peripheral surface of the water guide tube 41 are separated from each other in the radial direction.

One end (downstream end: lower end in the present embodiment) of the air guide pipe 31 and one end (downstream end: lower end in the present embodiment) of the water guide pipe 41 are at substantially the same position in the axial direction. The other end (upstream end: upper end in the present embodiment) of the water guide pipe 41 is positioned upstream of the other end (upstream end: upper end in the present embodiment) of the air guide pipe 31. ing. That is, the portion on the other end side of the water guide tube 41 protrudes upstream from the other end of the air guide tube 31. One end (the lower end in the present embodiment) of the air flow path F1 is blocked by the orifice 50, and the other end (the upper end in the present embodiment) of the air flow path F1 is blocked by the closing member 33. ing.

The trunk portion 10 includes an air guide portion 30, a water guide portion 40, and a bubble forming portion 43. In the present embodiment, the water guide portion 40 is a water flow path F 2 defined by the inner peripheral surface of the tube wall of the water guide tube 41. The air guide 30 is an air flow path F 1 that is partitioned by the outer peripheral surface of the water guide tube 41 and the inner peripheral surface of the tube wall of the air guide tube 31. The bubble forming part 43 has a plurality of air introduction holes 43a. The plurality of air introduction holes 43 a are arranged at intervals in the circumferential direction and the axial direction of the water guide tube (inner cylindrical portion) 41. The diameter of each air introduction hole 43 a is smaller than the diameter of the supply hole 32 a in the air supply unit 32. The bubble forming part 43 is a cylindrical part of the water guide pipe 41 from the air introduction hole 43a located at the most upstream to the air introduction hole 43a located at the most downstream. In the present embodiment, the water guide unit 40 arranges water and air supplied from the air guide unit 30 through the air introduction holes 43 a of the bubble forming unit 43 into the water guide unit 40 on the lower side of the body unit 10. It guides toward the orifice portion 50 that is formed (that is, water containing bubbles is directed vertically downward). Thereby, since the uneven flow of water and air (bubbles) in the flow of water containing bubbles in the water guide unit 40 is suppressed, stable conditions in which sufficiently fine water droplets are stably sprayed from the spray unit 51. That is, the range in which sufficiently fine water droplets are stably sprayed even if the flow rate of water and air supplied to the spray nozzle 21 is changed is widened.

The orifice part 50 has a spray part 51 for generating a pressure difference before and after that to atomize and spray water droplets by expansion of bubbles, and a closing part 52 for closing one end of the air flow path F1. The spray unit 51 of the present embodiment sprays the fine water droplets downward.

The closed part 52 is an annular area on the radially outer side, and the spray part 51 is an area on the radially inner side with respect to the closed part 52. The blocking portion 52 has an inner surface (upstream surface) 52a that contacts one end of the air guide tube 31 and one end of the water guide tube 41 and closes one end of the air flow path F1.

The spray part 51 has a communication hole that allows the water flow path F2 and the outside of the spray nozzle 21 to communicate with each other. The communication hole includes a tapered hole 51a having a tapered surface whose inner diameter decreases toward the downstream side, and a spray hole 51b that is located on the downstream side of the tapered hole 51a and sprays water. The distance between the spray hole 51b and the heat exchanger 13 and the hole diameter of the spray hole 51b are such that all or most of the water droplets sprayed from the spray hole 51b evaporate (vaporize) while moving toward the heat exchanger 13. Set to The diameter of the spray hole 51b is smaller than the diameter of the air introduction hole 43a described later.

The inner diameter of the upstream end of the tapered hole 51a is designed to be about the same as or slightly smaller than the inner diameter D1 of one end of the water guide pipe 41. One end of the water guide pipe 41 and the upstream end of the tapered hole 51a are preferably connected without any step. The axial length of the taper hole 51a is larger than the axial length L4 of the spray hole 51b. The water flowing downstream through the tapered hole 51a along the tapered surface is gradually increased in flow rate and reaches the spray hole 51b. The water that has reached the spray hole 51b contains a large number of fine bubbles, and is sprayed to the outside of the spray nozzle 21 together with these bubbles. When water containing a large number of bubbles is sprayed from the spray holes 51b or after being sprayed from the spray holes 51b, the bubbles expand and are repelled to make water droplets fine.

The spray nozzle 21 of the present embodiment includes a supply region A1 provided with an air supply hole 32a, a bubble formation region A2 provided with a plurality of air introduction holes 43a, and a large number of bubbles formed in the bubble formation region A2. And a guide region A3 that guides water containing the water to the spray unit 51. In the present embodiment, the guide area A3 guides the water containing a large number of bubbles downward (specifically, the spray part 51 provided on the lower side of the body part 10). The guide area A3 also functions as a dispersion area (mixing area) for dispersing a large number of bubbles mixed in water to some extent in water. The guide area A3 is located between the bubble forming area A2 and the spraying part 51. The bubble formation area A2 is located downstream of the supply area A1. That is, in the axial direction, the supply region A1, the bubble formation region A2, the guide region A3, and the spray unit 51 are arranged in the order downstream.

In this embodiment, in the axial direction of the water guide tube 41, the length L2 of the bubble formation region A2 is larger than the inner diameter D1 of the water guide tube 41. Thereby, air is mixed in the water flowing through the water guide pipe 41 in a wide area in the axial direction. For this reason, it can be efficiently mixed in water in a state where a large number of bubbles are more dispersed. In the axial direction of the water guide tube 41, the length L3 of the guide region A3 is larger than the inner diameter D1 of the water guide tube 41. Thereby, a large number of bubbles mixed in water in the bubble formation region A2 can be effectively dispersed in water in the guide region A3.

Examples of water supply sources include water supplies such as waterworks. In this case, a liquid feed pipe 61 is connected to the upstream end of the water guide pipe 41. The liquid feeding pipe 61 is connected to a water tap (not shown). When the liquid feed pump 62 and the air feed pump 72 are driven, water is sprayed from the spray nozzle 21. In addition, the liquid feed pump 62 may be omitted, and water may be sprayed from the spray nozzle 21 using the water pressure of the tap water. In this case, the cost necessary for providing the liquid feed pump 62 and the running cost for driving the liquid feed pump 62 can be reduced. The water supply source may be a tank in which water is stored. In this case, the liquid feed pipe 61 is connected to a water supply port provided in the tank.

The average particle diameter of the water droplets is preferably, for example, 25 μm or less (required evaporation time is about 0.3 seconds or less). The average particle diameter of the water droplets can be adjusted by adjusting the hole diameter of the spray hole 51b, the hole diameter of the air introduction hole 43a, the pressure applied to the water flow path F2, the pressure applied to the air flow path F1, and the like.

The ratio between the water supply amount and the air supply amount is preferably 0.1 or less in weight ratio (weight of air / weight of water), for example. By adjusting the weight ratio within this range, the power required to supply air can be kept small. In addition, in the conventional two-fluid nozzle that simultaneously injects air and water in the spray hole of the spray nozzle, shearing force is applied to the water by the pressure of the air to make the water droplets fine, so it is necessary to inject high-speed air The weight ratio (weight of air / weight of water) is 0.4 or more. For this reason, in the conventional two-fluid nozzle, the power required for supplying air becomes large.

<Second Embodiment>
FIG. 4 is a cross-sectional view showing the spray nozzle 21 in the outdoor unit 11 according to the second embodiment of the present invention. The outdoor unit 11 according to the second embodiment is different from the outdoor unit 11 according to the first embodiment in the structure of the spray nozzle 21. The same components as those in the first embodiment are denoted by the same reference numerals as those in FIG.

As shown in FIG. 4, the spray nozzle 21 in the second embodiment is similar to the first embodiment in the supply area A1, the bubble formation area A2, and the bubble formation area A2 provided with the air supply holes 32a. And a guide region A3 that guides the water including a large number of formed bubbles to the spray unit 51.

As shown in FIG. 4, the water guide tube 41 is provided with a bubble forming portion 43. The bubble forming part 43 includes a porous part 42 made of a porous material. The porous portion 42 is made of, for example, a foam metal. The porous part 42 has a large number of air introduction holes 43a. The bubble forming portion 43 refers to a region of the water guide tube 41 from the most upstream end to the most downstream end of the porous portion 42.

The porous portion 42 in the present embodiment has a cylindrical shape that has substantially the same diameter as other portions of the water guide tube 41, but is not limited thereto. For example, the water guide tube 41 may be provided with a plurality of porous portions 42 that are arranged independently of each other so as to be scattered in the circumferential direction and / or the direction in which the water guide tube 41 extends.

The porous part 42 has a large number of continuous pores (a large number of air introduction holes 43a) in which the pores are connected to each other. Therefore, the air flowing through the air flow path F1 flows into the water flow path F2 through the numerous air introduction holes 43a. In the second embodiment, since such a porous portion 42 is provided, the porosity (void ratio) in the bubble formation region A2 can be increased as compared with the first embodiment.

<Third Embodiment>
FIG. 5 is a cross-sectional view showing the spray nozzle 21 in the outdoor unit 11 according to the third embodiment of the present invention. The outdoor unit 11 according to the third embodiment is different from the outdoor unit 11 according to the first embodiment in the structure of the spray nozzle 21.

As shown in FIG. 5, the spray nozzle 21 in the third embodiment includes an air guide part 30, a water guide part 40, a bubble forming part 43, and a spray part 51. The water guide 40 includes a cylindrical water guide tube 44. The air guide portion 30 includes a cylindrical air guide tube 34 connected to a side portion (tube wall) of the water guide tube 44. The tip of the air guide tube 34 enters the inside of the water guide tube 44. The spray unit 51 is provided at the tip (downstream end) of the water guide tube 44.

The spray nozzle 21 has an air flow path F1 and a water flow path F2. The water flow path F 2 is a space defined by the inner peripheral surface of the water guide tube 44. The air flow path F 1 is a space defined by the inner peripheral surface of the air guide tube 34. The outer diameter of the air guide tube 34 is smaller than the outer diameter of the water guide tube 44.

The spray part 51 has a communication hole that allows the water flow path F2 and the outside of the spray nozzle 21 to communicate with each other. The communication hole includes a tapered hole 51a having a tapered surface whose inner diameter becomes smaller toward the downstream side, and a spray hole 51b that is located downstream of the tapered hole 51a and sprays water to the outside.

1 is connected to the upstream end of the air guide pipe 34, and the liquid supply pipe 61 shown in FIG. 1 is connected to the upstream end of the water guide pipe 44. The air supplied from the air supply source flows through the air guide tube 34 and is introduced into the water flowing through the water guide tube 44 through the plurality of air introduction holes 43a.

FIG. 6A is a perspective view showing the air guide tube 34 of the spray nozzle 21 in the third embodiment. As shown in FIG. 6A, the air guide tube 34 has a cylindrical shape in which the outer diameter and the inner diameter are substantially uniform in the axial direction.

The bubble forming portion 43 is located at the tip of the air guide tube 34. The bubble forming part 43 is a circular plate-like body arranged so as to cover the opening at the tip of the air guide tube 34, and a plurality of air introduction holes 43a are scattered over almost the entire area of the plate-like body. Is formed. The bubble forming portion 43 is disposed in the water flow path F 2 of the water guide tube 44.

In the spray nozzle 21, air flows from the plurality of air introduction holes 43 a of the bubble forming portion 43 in a direction intersecting with the direction of water flow (in this embodiment, a direction orthogonal to the direction of water flow) in the water flow path F 2. Is blown out. With such an arrangement, the air blown out from the plurality of air introduction holes 43a is easily miniaturized by the shearing force of the water flow. Therefore, compared with the case where air is blown downstream from the plurality of air introduction holes 43a in the direction parallel to the direction of water flow in the water flow path F2, the bubbles can be made finer.

FIG. 6B is a perspective view showing Modification 1 of the air guide tube 34. In the first modification, the upstream side portion of the air guide tube 34 has a cylindrical shape with substantially uniform outer diameter and inner diameter in the axial direction, and the downstream side (tip side) portion of the air guide tube 34 is The outer diameter and the inner diameter increase toward the downstream side. A bubble forming portion 43 having a plurality of air introduction holes 43 a is provided at the tip of the air guide tube 34.

In the first modification shown in FIG. 6 (B), the area of the bubble forming portion 43 of the plate-like body can be increased as compared with the form shown in FIG. 6 (A). Accordingly, in FIGS. 6A and 6B, when the number of the air introduction holes 43a is the same, in the first modification, the air introduction holes 43a are different from each other in the form shown in FIG. 6A. Since the interval between the bubbles can be increased, reaggregation of bubbles can be suppressed.

FIG. 6C is a perspective view showing a second modification of the air guide tube 34. In the second modification, the air guide tube 34 has a cylindrical shape whose outer diameter and inner diameter are substantially uniform in the axial direction. A bubble forming portion 43 is provided at the tip of the air guide tube 34. The bubble forming portion 43 is a porous body (porous portion) made of a porous material. The porous part has a large number of air introduction holes 43a. The porous body is made of foam metal, for example. The porous body has a large number of continuous pores (a large number of air introduction holes 43a) in which the pores are connected to each other. In Modification 2, since such a porous portion is provided, the porosity (porosity) in the bubble forming portion 43 is increased as compared with the embodiment shown in FIGS. 6 (A) and 6 (B). Can do.

As described above, in each embodiment, the spray nozzle 21 includes the air guide unit 30 through which air flows, the water guide unit 40 through which water flows, and the air of the air guide unit 30 in the water of the water guide unit 40. A bubble forming part 43 that forms a large number of bubbles in water by flowing in, and is located downstream of the water guide part 40 in the water flow direction, and water containing a large number of bubbles in the water guide part 40 A spraying part 51 for spraying. For this reason, the motive power as the whole air conditioning apparatus can be reduced, suppressing the corrosion of a heat exchanger.

In the first embodiment and the second embodiment, a double pipe structure in which the air guide pipe 31 is arranged so as to surround the outer periphery of the water guide pipe 41 provided with one or a plurality of air introduction holes 43a is adopted. Yes. Therefore, the spray nozzle 21 provided with the water guide part 40, the air guide part 30, and the bubble formation part 43 can be manufactured at low cost.

In 1st Embodiment and 2nd Embodiment, since the several air introduction hole 43a is provided in the circumferential direction of the water guide pipe 41, and the direction where the water guide pipe 41 extends mutually spaced apart, the air introduction hole 43a is provided. Compared with the case where the number is one, air can flow into the water of the water guide pipe 41 from a plurality of portions spaced from each other in the circumferential direction and the direction in which the water guide pipe 41 extends. Therefore, bubbles can be efficiently dispersed in the water flowing through the water guide tube 41. In addition, compared with the case where there is one air introduction hole 43a, the resistance to allow air to flow into water is reduced, and the pressure required to allow air to flow into water can be set low. Thereby, motive power can further be reduced.

In the second embodiment, since the bubble forming part 43 includes the porous part 42 having the plurality of air introduction holes 43a, the porosity of the bubble forming part 43 can be increased. Thereby, the resistance when air is introduced into the water of the water guide pipe 41 through the bubble forming part 43 can be further reduced. Thereby, the pressure required to allow air to flow into water can be further reduced.

In the second embodiment, it is possible to reduce the variation in the hole diameters of the plurality of air introduction holes (43a) by forming the porous portion 42 from a foam metal. Thereby, since the diameter of the bubble formed in the bubble formation part 43 can be equalized to some extent, the dispersion | variation in the diameter of the water droplet sprayed in the spray part 51 can also be reduced.

The third embodiment includes a water guide pipe 44 and an air guide pipe 34 connected to the water guide pipe 44 and provided with one or a plurality of air introduction holes 43a at an end portion on the water guide pipe 44 side. The water guide section 40 includes a water flow path F2 defined by the inner peripheral surface of the water guide pipe 44, and the air guide section 30 includes an air flow path F1 defined by the inner peripheral surface of the air guide pipe 34, The bubble forming part 43 includes one or a plurality of air introduction holes 43a. In the third embodiment, the spray nozzle 21 can be formed with such a simple structure.

In each embodiment, a charging mechanism 80 for charging water sprayed from the spray nozzle 21 is further provided. Each water droplet sprayed from the spraying part 51 moves in the air in a charged state. Accordingly, the water droplets repel each other due to the electrostatic repulsive force, so that reaggregation of the water droplets is suppressed. Thereby, it can suppress that the diameter of a water droplet becomes large by re-aggregation. Moreover, since water droplets repel each other by an electrostatic repulsive force, a water droplet can be diffused in a wide range.

In each embodiment, the water guide unit 40 guides water containing bubbles in the vertical direction. Thereby, since the uneven flow of water and air (bubbles) in the flow of water containing bubbles in the water guide unit 40 is suppressed, stable conditions in which sufficiently fine water droplets are stably sprayed from the spray unit 51. That is, the range in which sufficiently fine water droplets are stably sprayed even if the flow rate of water and air supplied to the spray nozzle 21 is changed is widened. That is, in the case where water containing bubbles is guided in the vertical direction, in the flow of water containing bubbles in the water guide section 40, as in the case where water containing bubbles is guided in another direction (for example, the horizontal direction). It is possible to prevent air (bubbles) from gathering on the upper side and causing the air and water to flow unevenly (unevenly flow). Thereby, even if the supply conditions such as the flow rate of water and air supplied to the spray nozzle 21 are changed, the spray state is disturbed due to the drift in a wide range (when the water droplets are not sufficiently refined or the size of the water droplets). As a result, sufficiently fine water droplets can be stably sprayed from the spraying part 51.

Moreover, in each embodiment, the water guide part 40 guides the water containing air bubbles downward, and the spray part 51 sprays this downward. For this reason, compared with the case where the water guide part 40 guides the water containing air bubbles in another direction (for example, upward or horizontal direction) and the spray part 51 sprays this water in the same direction, the stable condition (spray part 51). From the above, the supply conditions such as water and air in which sufficiently fine water droplets are stably sprayed become the widest.

In addition, even when a large water droplet that is difficult to evaporate is sprayed from the spraying part 51, the large water droplet is sprayed downward, so that it is applied to the heat exchanger 13 by the sprayed momentum and the gravity applied to the water droplet. It falls downward (for example, the installation surface of the outdoor unit 11 or the like) across the air flow in the substantially horizontal direction. For this reason, the heat exchanger 13 is prevented from getting wet by the large water droplets.

<Other embodiments>
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.

In each of the above-described embodiments, as shown in FIG. 2, each spray nozzle 21 sprays water droplets downward on the three

side plates

12a, 12b, 12c facing the heat exchanger 13 and has the same height. Although the case where they are arranged at intervals in the horizontal direction so as to be positioned has been described as an example, the present invention is not limited to this. Since the cooling effect by the spray device 20 only needs to be exerted almost uniformly over almost the entire heat exchanger 13, for example, each spray nozzle 21 has water droplets toward the heat exchanger 13 as in the outdoor unit 11A shown in FIG. (In other words, water droplets are sprayed along the flow of outside air toward the heat exchanger 13). Specific examples are as follows.

Each spray nozzle 21 is arranged in a posture in which water droplets are sprayed toward the heat exchanger 13. That is, each spray nozzle 21 is arranged in a state where its axial direction is directed in a direction along the air flow (air flow) direction. Water droplets sprayed from each spray nozzle 21 move toward the heat exchanger 13 along the direction of the air flow while diffusing radially. All or most of the water droplets are vaporized before reaching the heat exchanger 13.

When each spray nozzle 21 is provided in the outdoor unit 11A in a posture in which water droplets are sprayed in the horizontal or slightly inclined direction as described above, the plurality of spray nozzles 21 are connected to the heat exchanger 13 as shown in FIG. It is preferable that the three

side plates

12a, 12b, and 12c facing each other are arranged with a space therebetween. More specifically, based on the range in which the water droplets sprayed from each spray nozzle 21 diffuse, that is, the range in which the air toward the heat exchanger 13 is cooled by each spray nozzle 21, the plurality of spray nozzles 21 are mutually connected. For example, they are arranged so as to be scattered at intervals of about several tens of centimeters in the vertical direction and the horizontal direction. In this arrangement example, the range in which water droplets diffuse from each spray nozzle 21 is, for example, about 50 cm in diameter, the width of the side plate 12a is, for example, about 100 cm, the width of the

side plates

12b, 12c is about 30 cm, and the height of each side plate The case where thickness is about 80 cm is illustrated. The four spray nozzles 21 are arranged in the vertical direction and the horizontal direction on the side plate 12a, and the two spray nozzles 21 are arranged in the vertical direction on the side plate 12b and the side plate 12c, respectively.

By arranging the spray nozzles 21 as described above, the cooling effect of the spray device 20 is exerted almost uniformly over almost the entire heat exchanger 13.

Further, when the spray nozzle 21 is arranged in a posture to spray water droplets toward the heat exchanger 13 (that is, along the flow of outside air toward the heat exchanger 13), the plurality of spray nozzles 21 are, for example, heat In some regions of the exchanger 13, the regions may be arranged in a biased manner so that a higher cooling effect can be obtained than in other regions. Specific examples are as follows.

FIG. 9 is a schematic diagram for explaining another arrangement example of the spray nozzle 21 with respect to the heat exchanger 13. In FIG. 9, the spray nozzle 21 is not shown. The heat exchanger 13 shown in FIG. 9 has three heat transfer tubes P1, P2, and P3. The three heat transfer tubes P1, P2, P3 have mutually independent refrigerant paths. Each heat transfer tube has a refrigerant path that is folded and meanders at both ends in the width direction of the heat exchanger 13. A refrigerant inlet is provided at one end (right end in FIG. 9) of each heat transfer tube, and a refrigerant outlet is provided at the other end (left end in FIG. 9).

In order to change the refrigerant into a supercooled liquid having a predetermined degree of supercooling in the heat exchanger 13, supercooling regions (downstream end regions) SB1, SB2, SB3 in the vicinity of the refrigerant outlet of the heat transfer tubes P1, P2, P3. Is preferably cooled preferentially. In the arrangement example shown in FIG. 9, the plurality of spray nozzles 21 are provided mainly at positions facing the supercooling regions SB1, SB2, and SB3 in the heat exchanger 13.

As a specific example in which the spray nozzle 21 is intensively provided in a part of the region, the following forms may be mentioned. For example, a configuration in which the plurality of spray nozzles 21 are provided only at positions facing the supercooling areas SB1, SB2, and SB3 in the heat exchanger 13, or the supercooling areas SB1, SB2, and the positions facing the other areas. A form in which the spray nozzles 21 are densely provided at a position facing the SB 3 is exemplified.

Further, for example, each spray nozzle 21 may be arranged so as to spray water droplets upward as shown in FIG.

In this case, each spray nozzle 21 is disposed outside and below the heat exchanger 13 in the outdoor unit 11B. At this time, in each spray nozzle 21, the water guide unit 40 guides water containing bubbles upward, and the spray unit 51 sprays water containing many bubbles guided by the water guide unit 40 upward. To do. The plurality of spray nozzles 21 are arranged to spray water droplets upward on the three

side plates

12a, 12b, 12c facing the heat exchanger 13 and at the same height position (lower than the heat exchanger 13). Position), and are spaced apart from each other in the horizontal direction.

The water in the water flow including the bubbles in the water guide 40 is also obtained when the water guide 40 guides the water containing the bubbles upward and the spraying unit 51 sprays the water upward. And the water droplets sufficiently refined from the spraying part 51 are stably sprayed.

In addition, the spray nozzle 21 is directed upward from the lower side with respect to the flow of outside air toward the heat exchanger 13 having a wind speed distribution (wind speed distribution resulting from the positional relationship between the heat exchanger 13 and the blower 14) that flows faster toward the upper side. Since the water droplets are sprayed toward the heat exchanger 13, sufficient dwell times are secured for vaporization of the water droplets directed to the respective portions in the height direction of the heat exchanger 13 before reaching the portions of the heat exchanger 13. Details are as follows.

The outdoor unit 11B (see FIG. 10) in which the heat exchanger 13 is erected with respect to the installation surface (horizontal plane) and the blower 14 is disposed in the case 2 on the inner side in the horizontal direction and on the upper side of the heat exchanger 13. ), The air flow toward the heat exchanger 13 is not uniform, and as shown in FIG. This is because the flow of air sucked in the suction port (not shown) provided in the

side plates

12a, 12b, and 12c of the case 2 becomes faster toward the position closer to the blower 14 (upper side). In addition, in FIG. 11, the horizontal arrow toward the heat exchanger 13 is formed when the air blower 14 discharges the air inside the outdoor unit 11B (case 2) to the outside (see the upward arrow in FIG. 11). This shows the flow of outside air (air) that flows toward the heat exchanger 13. The length of each arrow indicating the air flow indicates the magnitude of the wind speed at the height position.

In this state, when the spray nozzle 21 is configured to spray water droplets from below to above the heat exchanger 13, from the spray nozzle 21 disposed below the heat exchanger 13 to the top of the heat exchanger 13. The distance becomes larger. For this reason, the water drop (refer to arrow (alpha) of FIG. 11) sprayed from the spray nozzle 21 and heading to the upper part of the heat exchanger 13 has enough space time required for vaporization of the said droplet. Therefore, although the flow of the outside air toward the upper part of the heat exchanger 13 is fast, it can be vaporized before reaching the upper part of the heat exchanger 13. On the other hand, although the distance from the spray nozzle 21 arranged on the lower side of the heat exchanger 13 to the lower part of the heat exchanger 13 is close, the flow of air toward the part is slow, so the heat is exchanged by being sprayed from the spray nozzle 21. It is possible to secure a sufficient dwell time required for vaporization of water droplets (see arrow β in FIG. 11) toward the lower portion of the vessel 13. Thereby, water droplets can be vaporized before reaching the lower part of the heat exchanger 13. In this manner, in the outdoor unit 11B, due to the positional relationship between the heat exchanger 13 and the blower 14, a wind speed distribution is formed such that the flow is faster toward the upper side in the air flow toward the heat exchanger 13. And in the structure by which a water droplet is sprayed upwards from the lower part of the heat exchanger 13, the water droplet which goes to the site | part of the heat exchanger 13 of the height position where a wind speed is large is from the spray nozzle 21 to the said site | part of the heat exchanger 13. The distance from the spray nozzle 21 to the relevant part of the heat exchanger 13 becomes smaller as the water droplets travel toward the part of the heat exchanger 13 at the height position where the wind speed is small. Sufficient time is secured. Thereby, each water droplet sprayed from the spray nozzle 21 is vaporized before reaching the heat exchanger 13, and as a result, the heat exchanger 13 is prevented from getting wet by the water droplet sprayed from the spray nozzle 21. .

In each embodiment, in the spray nozzle 21, the entire water guide portion 40 has a shape that guides water in the vertical direction, but is not limited to this shape. In other words, at least a portion corresponding to the guide region A3 in the water guide unit 40 may be configured to guide water in the vertical direction (downward in each of the above embodiments). For example, in the water guide part 40 of each embodiment, at least a part downstream of the bubble forming part 43 (more specifically, at least a part of the water guide pipe 41 downstream of the most downstream air introduction hole 43a). ) May be configured to guide water containing bubbles in the vertical direction toward the spray unit 51. According to such a configuration, there is an effect that uneven flow of air and water in the flow of water including bubbles in the water guide unit 40 is suppressed, and sufficiently fine water droplets are stably sprayed from the spray unit 51. can get.

In each embodiment, as shown in FIG. 1, the water sprayed from the spraying device 20 is charged by passing an electric current through the water supplied from the water supply mechanism 60 (energizing the water). It is not limited. For example, the water to be sprayed may be charged using electrostatic induction as shown in FIGS. 12 (A) and 12 (B), or by discharge in air as shown in FIG. The sprayed water may be charged. Specifically, it is as follows.

First, a method using electrostatic induction will be described with reference to FIGS. 12 (A) and 12 (B). FIG. 12A is a schematic diagram for explaining a first modification of the charging mechanism 80, and FIG. 12B is an enlarged perspective view for explaining the spray nozzle 21 and the induction electrode 85.

The insulating pipe 61b as in the above embodiment may not be provided in the liquid feeding pipe 61 of the water supply mechanism 60 in the spray device 20. That is, the entire liquid feeding pipe 61 is formed by the conductive member. In the liquid feeding pipe 61, at least the portion from the portion where the electrode of the charging power supply 81 is connected to the spray nozzle 21 may be formed by a conductive member. For example, upstream of the portion where the electrode is connected. The side portion may be formed of an insulating member.

The charging mechanism 80 includes a charging power supply 81 and an induction electrode 85. The charging power supply 81 has one electrode connected to the spray nozzle 21 and the other electrode connected to the induction electrode 85. Thereby, the charging power source 81 can apply a voltage between the spray nozzle 21 and the induction electrode 85. In the present embodiment, a positive electrode is connected to the spray nozzle 21 and a negative electrode is connected to the induction electrode 85. Thereby, the water (each water droplet) sprayed from the spray nozzle 21 is charged positively. The positive electrode of the charging power supply 81 is grounded so that the spray nozzle 21 is at the ground potential.

The induction electrode 85 is arranged at a predetermined interval from the spray nozzle 21, and causes electrostatic induction in water passing through the spray nozzle 21 when a predetermined voltage is applied between the spray nozzle 21. Specifically, the induction electrode 85 is an annular electrode having an inner diameter larger than the outer diameter of the spray nozzle 21 (see FIG. 12B). This induction electrode 85 has the axis (center axis) of the spray nozzle 21 and the center axis of the induction electrode 85 coincident with each other, and the tip position of the spray nozzle 21 in the axial direction of the spray nozzle 21 or a slightly proximal side thereof. It is arranged at the position. The induction electrode 85 may be disposed in front of the spray nozzle 21 (on the heat exchanger side) in the axial direction of the spray nozzle 21, but dirt or the like is generated in contact with the mist-like water sprayed by the spray nozzle 21. For this reason, it is preferable that the spray nozzle 21 is disposed at the distal end position or a slightly proximal end position.

In the charging mechanism 80, electrostatic induction is generated in water passing through the spray nozzle 21 when the charging power source 81 applies a predetermined voltage (for example, 5000 V to 10000 V) between the spray nozzle 21 and the induction electrode 85. The water in this state is sprayed from the spray nozzle 21 so that each water droplet is charged.

Next, a method for charging water sprayed by electric discharge will be described with reference to FIG. FIG. 13 is a schematic diagram for explaining a second modification of the charging mechanism 80.

As with the electrostatic induction type flow path section, the liquid supply pipe 61 of the water supply mechanism 60 in the spray apparatus 20 of the type may not be provided with the insulating pipe as in the above embodiment.

The charging mechanism 80 includes a charging power supply 81 and a pair of discharge electrodes (a first discharge electrode 86 and a second discharge electrode 87).

The charging power supply 81 has a positive electrode connected to the first discharge electrode 86 and a negative electrode connected to the second discharge electrode 87. The negative electrode is grounded so that the second discharge electrode 87 is at the ground potential. Thereby, the charging power supply 81 can apply a voltage between the first discharge electrode 86 and the second discharge electrode 87 (between a pair of discharge electrodes).

The pair of

discharge electrodes

86 and 87 are arranged so as to sandwich an area through which mist-like water sprayed from the spray nozzle 21 passes.

In the charging mechanism 80, the charging power source 81 applies a predetermined voltage (for example, 5000 V to 10000 V) between the pair of

discharge electrodes

86 and 87, thereby discharging (for example, corona discharge) between the

discharge electrodes

86 and 87. As a result of this discharge, each water droplet passing between the

discharge electrodes

86 and 87 is charged. In this case, each water droplet is positively charged.

Further, in the charging mechanism 80 of each embodiment (charging mechanism for energizing water), as shown in FIG. 1, a voltage is applied between the spray nozzle 21 and the metal pipe 61a with the insulating pipe 61b interposed therebetween. Thus, the water flowing through the insulating pipe 61b is energized. Thereby, the sprayed water is charged, but the position to be energized is not limited to this position. For example, when the water supply mechanism 60 has a water supply source such as a tank, the water supply mechanism 60 may be charged by energizing the water stored in the water supply source and supply the charged water to the spray nozzle. Good. In this case, charging is performed by energizing water, but it is not necessary to provide an insulating pipe in the water guide pipe of the water supply mechanism.

In each embodiment, the case where the spray device 20 includes the charging mechanism 80 as a charging unit has been described as an example. However, the charging unit is not an essential configuration in the present invention and may be omitted. When the charging unit is omitted, it is not necessary to use the resin pipe 61b, and the entire liquid feed pipe 61 can be formed by the metal pipe 61a.

In the first embodiment and the second embodiment, the case where the guide area A3 is provided between the bubble forming area A2 and the spray unit 51 has been described as an example, but the guide area A3 may be omitted. In this case, an air introduction hole 43a is formed in the water guide pipe 41 at a position in the vicinity of the tapered hole 51a. However, in the form in which the guide area A3 is provided as shown in FIG. 3, a large number of bubbles mixed in water are more easily dispersed in water than in the case where the guide area A3 is not provided. Therefore, more uniform water droplets can be sprayed from the spray unit 51.

In each embodiment, the case where the blower 14 is located downstream of the heat exchanger 13 in the air flow direction is illustrated, but the present invention is not limited to this. For example, in the air flow direction, the blower 14, the spray nozzle 21, and the heat exchanger 13 may be arranged in this order in the downstream direction.

In the second and third embodiments, the case where the porous portion 42 is formed of a foam metal has been described as an example, but the present invention is not limited to this. The porous portion 42 is not necessarily formed of a metal, and may be formed of, for example, a synthetic resin.

In the third embodiment, the case where the air guide pipe (second guide pipe) 34 is connected to the side of the water guide pipe (first guide pipe) 44 is illustrated, but the present invention is not limited to this. For example, the air guide tube 34 may be connected to the end portion (upstream end portion) of the water guide tube 44 in the longitudinal direction. In this case, the direction in which the water guide tube 44 extends and the direction in which the air guide tube 34 extend are substantially in the same direction.

Here, the embodiment will be outlined.

(1) In the above embodiments, the power of the entire air conditioner can be reduced while suppressing corrosion of the heat exchanger. Specifically, it is as follows.

That is, in the said embodiment, the water containing many bubbles is formed in the water guide part (40), and the water containing these many bubbles is sprayed from the spray part (51). At this time or after being sprayed from the spraying part (51), bubbles are repelled and droplets are made finer. Since the droplets thus made finer are easily vaporized (evaporated) before reaching the heat exchanger (13), the droplets are prevented from adhering to the heat exchanger (13). Thereby, corrosion of a heat exchanger (13) is suppressed.

Also, if the droplets are vaporized before reaching the heat exchanger (13), the air toward the heat exchanger (13) is cooled by the latent heat (heat of vaporization). Therefore, since the temperature of the air passing through the heat exchanger (13) is lower than when water is not sprayed, it is necessary to drive the compressor, blower, etc. during the cooling operation of the air conditioner. Power can be reduced. Moreover, in this configuration, unlike the conventional two-fluid nozzle, large power for injecting air into water at high speed is not required in the spray hole of the spray nozzle. That is, in this configuration, only the power for forming a large number of bubbles in the water flowing through the water guide portion (40) is required. The power required to send the power can be reduced. Thereby, the motive power as the whole air conditioning apparatus can be reduced effectively.

(2) In the outdoor unit, the water guide part (40) has a tube wall formed in a tube shape, and has one or more air introduction holes (43a) penetrating the tube wall in the thickness direction. The air guide (30) has a tubular shape surrounding the outer periphery of the water guide (40).

As in this configuration, a double tube structure in which the air guide part (30) is arranged so as to surround the outer periphery of the water guide part (40) provided with one or a plurality of air introduction holes (43a) is adopted. Thus, the spray nozzle (21) can be manufactured at low cost.

(3) In the outdoor unit, the water guide part (40) has the plurality of air introduction holes (43a), and the plurality of air introduction holes (43a) are formed in the water guide part (40). It is preferable that it is provided at intervals in the circumferential direction and the direction in which the water guide portion (40) extends.

In this configuration, the plurality of air introduction holes (43a) are provided at intervals in the circumferential direction of the water guide portion (40) and the direction in which the water guide portion (40) extends. Compared with the case where 43a) is formed, air is made to flow into the water of the water guide part (40) from a plurality of parts spaced apart from each other in the circumferential direction and the direction in which the water guide part (40) extends. be able to. Accordingly, it is possible to efficiently disperse the bubbles in the water flowing through the water guide portion (40). In addition, compared with the case where one air introduction hole (43a) is formed, the resistance to allow air to flow into water is reduced, and the pressure required to allow air to flow into water is set low. be able to. Thereby, motive power can further be reduced.

(4) In the outdoor unit, the water guide part (40) has a tubular shape, and has a porous part (42) at least partially, and the air guide part (30) You may have the pipe shape surrounding the outer periphery of a guide part (40).

In this configuration, since the water guide part (40) has the porous part (42), the diameters of the bubbles are easily uniformed, and variations in the diameters of the droplets sprayed in the spray part (51) can be reduced. .

(5) In the outdoor unit, the porous portion (42) can be exemplified by a form formed of a foam metal.

In this configuration, the porous portion (42) is formed of a foam metal. Since the porous portion (42) has a high porosity, it is possible to reduce resistance when air is introduced into the water of the water guide tube (41) through the porous portion (42). Thereby, the pressure required to allow air to flow into water can be reduced.

(6) In the outdoor unit, the water guide portion (40) has a tube shape, the air guide portion (30) has a tube shape, and a tip end portion of the water guide portion (40). ) May be connected.

In this configuration, the spray nozzle 21 can be formed with a simple structure in which the air guide (30) is connected to the water guide (40).

(7) In the outdoor unit, the air guide part (30) preferably has a porous part (42) at its tip.

In this configuration, since the air guide part (30) has the porous part (42), the diameters of the bubbles are easily made uniform, and variation in the diameters of the droplets sprayed in the spray part (51) can be reduced. .

(8) It is preferable that the outdoor unit further includes a charging unit (80) for charging water sprayed from the spray nozzle (21).

In this configuration, each droplet sprayed from the spray section (51) moves in the air in a charged state. Therefore, since the droplets repel each other due to the electrostatic repulsive force, reaggregation of the droplets is suppressed. Thereby, it can suppress that the diameter of a droplet becomes large by re-aggregation. Further, since the droplets repel each other by the electrostatic repulsion force, the droplets can be diffused over a wide range.

(9) In the outdoor unit (11) of the air conditioner, it is preferable that the water guide section (40) guides water containing bubbles in the vertical direction.

Thus, in the form in which the water guide part (40) guides the water containing bubbles in the vertical direction, the uneven flow of water and air (bubbles) in the flow of water containing the bubbles in the water guide part (40) can be suppressed. . For this reason, the stable conditions for spraying sufficiently fine droplets from the spraying part (51) stably become wide. In other words, even if the flow rate of water and air supplied to the spray nozzle (21) is changed, the range in which sufficiently fine droplets are stably sprayed becomes wide. That is, in the embodiment in which the water containing bubbles is guided in the vertical direction, the water containing bubbles in the water guide section (40) is used as in the case where the water containing bubbles is guided in another direction (for example, the horizontal direction). In the flow, air (bubbles) gathers on the upper side, and air and water are prevented from flowing unevenly (unevenly flowing). Thereby, even when the supply conditions such as the flow rate of water and air supplied to the spray nozzle (21) are changed, the spray state is disturbed due to the drift in a wide range (if the droplets are not sufficiently refined, The unevenness of the size of the droplets is suppressed), and the sufficiently fine droplets are stably sprayed from the spraying part (51).

(10) When the water guide part (40) guides the water containing bubbles in the vertical direction as described above, the spray nozzle (21) is more than the heat exchanger (13) in the outdoor unit (11). The water guide part (40) is arranged outside and guides the water containing bubbles downward, and the spray part (51) is arranged below the water guide part (40) and the water. The form which sprays the water containing the said many bubbles guided by the guide part (40) toward the downward direction is more preferable.

In this way, the water guide part (40) guides the water containing bubbles downward, and the spray part (51) sprays the water downward, so that the other direction (for example, upward or horizontal direction). Compared with the case where the water guide part (40) guides the water containing bubbles and the spray part (51) sprays the water in the same direction, the stability condition becomes the widest. That is, the supply conditions such as water and air are such that the sufficiently fine droplets are stably sprayed from the spray section (51).

Moreover, even when a large droplet is sprayed from the spray section (51), this droplet is sprayed downward, so that the heat exchanger ( It falls across the flow of air in the substantially horizontal direction toward 13). As a result, even if a large droplet is sprayed, the droplet can be prevented from adhering to the heat exchanger (13) and wetting the heat exchanger (13).

(11) When the water guide part (40) contains bubbles and guides the water in the vertical direction, the outdoor unit (11) includes a blower (14) that forms a flow of air toward the heat exchanger (13), The blower (14) is disposed inside and above the heat exchanger (13) in the outdoor unit (11), flows into the outdoor unit (11), and the heat exchanger (13). The air after heat exchange is directed upward and discharged to the outside of the outdoor unit (11), and the spray nozzle (21) is arranged outside the heat exchanger (13) in the outdoor unit (11). The water guide part (40) guides water containing bubbles upward, and the spray part (51) is disposed above the water guide part (40), and the water guide part (40) In the form of spraying upward the water containing the numerous bubbles guided by There may be.

Thus, the water guide part (40) also guides the water containing bubbles upward, and the spray part (51) sprays upwards, so that the bubbles in the guide part (40) are included. The uneven flow of air and water in the water flow is suppressed, and sufficiently fine droplets are stably sprayed from the spray section (51).

In addition, the flow of air toward the heat exchanger (13) having a wind speed distribution (wind speed distribution due to the positional relationship between the heat exchanger (13) and the blower (14): see FIG. 11) that is faster toward the upper side. On the other hand, since the spray nozzle (21) sprays the liquid droplets upward, the liquid droplets directed to the respective parts in the height direction of the heat exchanger (13) reach the part of the heat exchanger (13). Sufficient hovering time to vaporize each is ensured, thereby preventing the heat exchanger (13) from getting wet by the droplets. Details are as follows.

The distance from the spray nozzle (21) arranged on the lower side of the heat exchanger (13) to the upper part of the heat exchanger (13) increases. For this reason, as for the droplet sprayed from the spray nozzle (21) and heading to the upper part of the heat exchanger (13), the dwell time required for the vaporization of the droplet is sufficiently secured. Therefore, although the air flow toward the upper part of the heat exchanger (13) is fast, it vaporizes before reaching the upper part of the heat exchanger (13). On the other hand, although the distance from the spray nozzle (21) arranged on the lower side of the heat exchanger (13) to the lower part of the heat exchanger (13) is close, the flow of air toward the part is slow, so the spray nozzle ( The droplets sprayed from 21) and directed to the lower part of the heat exchanger (13) can sufficiently secure the dwell time necessary for the droplets to vaporize. Thereby, water droplets can be vaporized before reaching the lower part of the heat exchanger (13). Thus, in the said outdoor unit (11), due to the positional relationship between the heat exchanger (13) and the blower (14), the wind speed that flows faster toward the upper side in the air flow toward the heat exchanger (13). A distribution is formed. In the configuration in which the droplets are sprayed upward from the spray nozzle (21), the droplets directed toward the portion of the heat exchanger (13) at a height position where the wind speed is higher are closer to the heat exchanger from the spray nozzle (21). The distance from the spray nozzle (21) to the relevant part of the heat exchanger (13) increases as the distance to the relevant part of (13) increases and the liquid droplets toward the part of the heat exchanger (13) at the height position where the wind speed is low Since the distance becomes small, a sufficient dwell time for vaporization is ensured in each droplet. Thereby, each droplet sprayed from the spray nozzle (21) is vaporized before reaching the heat exchanger (13), and as a result, the heat exchanger (13) is sprayed from the spray nozzle (21). It is prevented from getting wet by droplets.

As described above, according to each of the above embodiments, the power of the entire air conditioner can be reduced while suppressing corrosion of the heat exchanger.

11, 11A, 11B Outdoor unit 13 Heat exchanger 20 Spray device 21 Spray nozzle 30 Air guide portion 31 Air guide tube 34 Air guide tube (second guide tube)
40 water guide part 41 water guide pipe 42 porous body 44 water guide pipe (first guide pipe)
50 Orifice part 51 Spraying part 80 Charging part

Claims

A heat exchanger,
A spray nozzle for spraying water on the air toward the heat exchanger,
The spray nozzle is
An air guide through which air flows;
As the water flows, a water guide part that forms water containing a large number of bubbles by flowing the air that has flowed through the air guide part into the water;
An outdoor unit of an air conditioner, comprising: a spray unit that is located downstream of the water guide unit in the water flow direction and sprays water containing a large number of bubbles formed in the water guide unit to the outside. .
In the outdoor unit of the air conditioning apparatus according to claim 1,
The water guide portion has a tube wall formed in a tube shape, and has one or a plurality of air introduction holes penetrating the tube wall in the thickness direction,
The air guide unit is an outdoor unit of an air conditioner having a tube shape surrounding an outer periphery of the water guide unit.
In the outdoor unit of the air conditioning apparatus according to claim 2,
The water guide portion has the plurality of air introduction holes,
The plurality of air introduction holes are outdoor units of an air conditioner provided at intervals in a circumferential direction of the water guide portion and a direction in which the water guide portion extends.
In the outdoor unit of the air conditioning apparatus according to claim 1,
The water guide part has a tubular shape, and has a porous part at least in part,
The air guide unit is an outdoor unit of an air conditioner having a tube shape surrounding an outer periphery of the water guide unit.
In the outdoor unit of the air conditioning apparatus according to claim 4,
The porous part is an outdoor unit of an air conditioner formed of foam metal.
In the outdoor unit of the air conditioning apparatus according to claim 1,
The water guide portion has a tube shape,
The air guide unit is an outdoor unit of an air conditioner having a tubular shape, and a tip portion of the air guide unit is connected to the water guide unit.
In the outdoor unit of the air conditioning apparatus according to claim 6,
The air guide part is an outdoor unit of an air conditioner having a porous part at a tip part thereof.
The outdoor unit for an air conditioner according to any one of claims 1 to 7,
An outdoor unit for an air conditioner, further comprising a charging unit that charges water sprayed from the spray nozzle.
In the outdoor unit of the air conditioning apparatus of any one of Claims 1 thru | or 8,
The water guide unit is an outdoor unit of an air conditioner that guides water containing bubbles in a vertical direction.
In the outdoor unit of the air conditioning apparatus according to claim 9,
The spray nozzle is disposed outside the heat exchanger in the outdoor unit,
The water guide unit guides water containing bubbles downward,
The spray unit is an outdoor unit of an air conditioner that is disposed below the water guide unit and sprays water including the plurality of bubbles guided by the water guide unit downward.
In the outdoor unit of the air conditioning apparatus according to claim 9,
A blower that forms a flow of air toward the heat exchanger;
The blower is disposed inside and on the upper side of the heat exchanger in the outdoor unit, and the air after flowing into the outdoor unit and exchanging heat with the heat exchanger is directed upwards of the outdoor unit. To the outside,
The spray nozzle is disposed outside the heat exchanger in the outdoor unit,
The water guide unit guides water containing bubbles upward,
The spray unit is an outdoor unit of an air conditioner that is disposed on the upper side of the water guide unit and sprays water including the plurality of bubbles guided by the water guide unit upward.