JP6014803B1 - Fan - Google Patents

Abstract

The present invention provides a fan capable of efficiently blowing cold air even in a large flow rate type with a large blade diameter. A fan according to the present invention includes a housing in which an air inlet and an air outlet are formed, air is sucked into the housing from the inlet, and the sucked air is blown out from the outlet. An axial flow fan, a vaporization filter through which air sucked from the suction port passes, a water supply system capable of supplying water to the vaporization filter, and the vaporization filter installed downstream of the vaporization filter An indirect heat exchanger for cooling the air that has passed, and a cooler for cooling the refrigerant of the indirect heat exchanger. [Selection] Figure 1

Description

  The present invention relates to an electric fan that blows out cool air by using heat of vaporization of water contained in a vaporization filter.

  An electric fan simply creates an air flow, but the air warmed on the surface of the body is blown away by the air flow, so that the electric fan feels cool. However, basically, since the electric fan does not have a function of lowering the temperature of the air, if the temperature becomes too high, it will no longer feel cool.

  Therefore, a fan (cool air fan) that uses the heat of vaporization of water to actively lower the temperature of the air and blow out cold air is used. Specifically, a vaporization filter is installed in an air passage, and water is supplied to the vaporization filter. And if air passes the vaporization filter containing water, the water contained in the vaporization filter will vaporize, and since the vaporization heat required in that case will be taken from air, air is cooled.

  In Patent Documents 1 and 2, in this type of cold air fan, water supplied exceeding the water-containing capacity of the vaporization filter falls from the vaporization filter to the tank. Since this occurs, a method for preventing it has been disclosed.

Japanese Patent Laid-Open No. 5-93525 JP 2008-138932 A

  However, in the case of large spaces such as gymnasiums, factories, warehouses, and large-flow type fans with large blade diameters that are used outside, even if the heat of vaporization of water is used, cooling of the air cannot catch up and warm air is blown out. There was a thing.

  Then, an object of this invention is to provide the electric fan which can blow off cool air efficiently even if it is a large flow type with a large blade diameter.

The electric fan according to the present invention is
A housing formed with an air inlet and an air outlet;
An axial fan for sucking air into the housing from the suction port and blowing out the sucked air from the air outlet;
A vaporization filter that allows the air sucked from the suction port to pass through;
A water supply system capable of supplying water to the vaporization filter;
An indirect heat exchanger installed on the downstream side of the vaporization filter for cooling the air that has passed through the vaporization filter;
Possess a cooler for cooling the refrigerant of the indirect heat exchanger,
The inlet and the outlet are formed on the same side with respect to the housing,
The air outlet, the being formed on the side surface center portion of the housing, said suction port, that is formed on the outer edge of the air outlet.

  ADVANTAGE OF THE INVENTION According to this invention, even if it is a large flow type with a large blade | wing diameter, the electric fan which can blow off cold wind efficiently can be provided.

It is a schematic diagram which shows the internal structure of the electric fan which concerns on one Embodiment of this invention. It is a front view which shows the external appearance of the electric fan which concerns on one Embodiment of this invention. It is a side view which shows the external appearance of the electric fan which concerns on one Embodiment of this invention. It is a rear view which shows the external appearance of the electric fan which concerns on one Embodiment of this invention. It is an enlarged view which shows the structure of a hot air discharge part.

  The electric fan according to the present invention is an electric fan that blows out cold air by using the heat of vaporization of water contained in the vaporization filter, and is an electric fan that can efficiently blow out cold air even in the case of a large flow rate type having a large blade diameter. . The internal structure of the electric fan according to one embodiment of the present invention is shown in FIG. 1, and the external appearance of the electric fan according to one embodiment of the present invention is shown in FIGS. In this electric fan, an air inlet 11 and an air outlet 12 are formed in the front portion of the housing 10, and an axial fan 20 is installed inside the housing 10.

  The housing 10 may be made of plastic or fiber reinforced plastic (FRP). However, at least the inner surface of the housing 10 is preferably formed of a heat insulating material such as foamed plastic from the viewpoint of preventing an internal temperature rise due to the outside air temperature. The formation position of the suction inlet 11 and the blower outlet 12 can be suitably set according to the objective. For example, the suction port 11 can be formed on one side surface of the housing 10 and the air outlet 12 can be formed on the opposite side surface. However, in this case, warm air before cooling is always sucked from the suction port 11, and particularly in a large flow rate type with a large blade diameter, the cooling cannot catch up and the warm air may blow out the air outlet 12. It was.

  Therefore, as shown in FIG. 2, the suction port 11 and the air outlet 12 are preferably formed on the same side with respect to the housing 10. By carrying out like this, a part of cold air blown out from the blower outlet 12 will also be sucked in again from the suction inlet 11, and the air blown out from the blower outlet 12 becomes colder. In particular, in the case of a large flow rate type having a large blade diameter, it is difficult to cool warm air at a stroke, and such a configuration is effective. From the viewpoint of downsizing the electric fan, as shown in FIGS. 2 to 4, the air outlet 12 is formed at the center of one side surface of the housing 10, and the air inlet 11 is formed at the outer edge of the air outlet 12. It is preferable.

The axial fan 20 is installed in the middle of the flow path from the inlet 11 to the outlet 12, sucks air from the inlet 11 into the housing 10, and sucks the sucked air from the outlet 12. A fan to blow out. As described above, the structure of the present invention is suitable for a large flow rate type fan having a large blade diameter. Specifically, the blade diameter of the axial fan is preferably 20 to 50 inches, and more preferably 24 to 36 inches. Moreover, 3500-35000m < ³ > / h is preferable and the flow volume at the time of a driving | operation has more preferable 5000-25000m < ³ > / h. A motor for rotating the axial fan 20 may be incorporated in the axial fan 20, but the axial fan 20 may be rotated by a belt and a pulley using a separate motor. At that time, the rotational speed of the axial fan 20 can be adjusted by using a gear.

  As shown in FIG. 1, the electric fan according to the present invention is provided with a vaporization filter 30 that allows air sucked from the suction port 11 to pass therethrough. The vaporization filter 30 is installed in the middle of the flow path from the suction port 11 to the blowout port 12, but is usually installed upstream from the axial fan 20. The vaporization filter 30 may be made of paper such as cardboard or plastic such as cellular urethane foam or sintered polyethylene material. Since water is included in the vaporization filter 30, it is preferable to take measures to increase hydrophilicity, particularly in the case of the vaporization filter 30 made of plastic.

  In the electric fan according to the present invention, as shown in FIG. 1, the water supply system 40 including the tank 41 and the water supply pipe 42 causes the vaporization filter 42 a formed on the water supply pipe 42 above the vaporization filter 30 to be vaporized. 30 is configured such that water is supplied (sprinkled). That is, the water contained in the tank 41 is sucked up by the water supply pipe 42 by a pump (not shown) installed in the tank 41 and supplied to the vaporizing filter 30 from the water spray part 42 a formed above the vaporizing filter 30. Is done. Thus, by supplying water from above the vaporization filter 30, the vaporization filter 30 can contain water. Then, when the air sucked from the suction port 11 passes through the vaporization filter 30 containing water, the water contained in the vaporization filter 30 is vaporized, and at that time, the necessary vaporization heat is taken away from the air. Air is cooled. Moreover, by introducing silver ion ceramic balls into the box 48 installed in the tank 41 containing water, the generation of bacteria can be suppressed and the air cleaning function can be exhibited. By using a germicidal lamp instead of the silver ion ceramic ball, the generation of bacteria can be suppressed and the air cleaning function can be exhibited. The position where the germicidal lamp is installed may be in the tank 41 or in the middle of the water supply pipe 42.

  In the electric fan according to the present invention, as shown in FIG. 1, it is preferable that a pre-vaporization filter 35 that allows the air sucked from the suction port 11 to pass is installed on the upstream side of the vaporization filter 30. Regarding the installation position of the pre-vaporization filter 35, it is installed in the middle of the flow path from the suction port 11 to the vaporization filter 30. The pre-vaporization filter 35 may be made of paper such as cardboard or plastic such as cellular urethane foam or sintered polyethylene material. Since water is contained in the pre-vaporization filter 35, it is preferable to take measures to increase hydrophilicity, particularly in the case of the plastic pre-vaporization filter 35.

  As shown in FIG. 1, the water supply system 40 supplies (sprinkles) water to the pre-vaporization filter 35 from the water spray portion 42 b formed in the water supply pipe 42 above the pre-vaporization filter 35. It is preferable that That is, the water contained in the tank 41 is sucked up into the water supply pipe 42 by a pump (not shown) installed in the tank 41, and from the water sprinkling part 42 b formed above the pre-vaporization filter 35. To be supplied. By carrying out like this, water can be supplied from the upper direction of the pre vaporization filter 35, and water can be included in the pre vaporization filter 35. FIG. When the air sucked from the suction port 11 passes through the pre-vaporization filter 35 containing water, the water contained in the pre-vaporization filter 35 is vaporized, and the necessary heat of vaporization is taken away from the air. So the air is cooled.

  By installing the pre-vaporization filter 35 on the upstream side of the vaporization filter 30 in this way, the air reaching the vaporization filter 30 can be cooled in advance. Further, the vaporization filter 30 is not exposed to the suction port 11, and it is possible to avoid the vaporization filter 30 from being warmed by sunlight or the like inserted into the suction port 11. As a result, the cooling efficiency of the air in the vaporization filter 30 can be increased.

  The water supplied by the water supply system 40 may be room temperature, but may be water cooled by a chiller or the like. For example, as shown in FIG. 1, the water can be cooled by throwing a throw-in chiller 45 into a cooling unit 46 connected to the water supply pipe 42. At that time, by making the pipe from the tank 41 to the cooling part 46 thicker than the other parts, water tends to stay in the cooling part 46 and the cooling efficiency can be increased. Further, by using a plurality of chillers 45, a throw-in type chiller can be introduced into each of the tanks 41 divided into a plurality of regions.

  As the chiller 45, for example, a relatively small one having a cooling power of 1 to 10 kW can be used. The chiller 45 generates heat. For example, the heat can be discharged by installing the exhaust heat fan 16a on the back surface of the housing 10 of the electric fan.

  The water that has been supplied to the vaporization filter 30 and the pre-vaporization filter 35 but has not been vaporized is preferably returned to the tank 41. In order to exchange the water in the tank 41, for example, a drain cock that discharges the water in the tank 41 to the outside is preferably installed at the lower portion of the housing 10, for example.

  The supply of water to the vaporization filter 30 and the pre-vaporization filter 35 by the water supply system 40 may be continuous or intermittent. Further, the vaporization filter 30 and the pre-vaporization filter 35 can be dried before the operation is stopped without supplying water. Generation | occurrence | production of mold | fungi etc. can be suppressed by drying the vaporization filter 30 and the pre vaporization filter 35. FIG. Furthermore, it is preferable to have a mechanism for adjusting the water supply rate for adjusting the temperature of the air. Further, in order to dry the vaporization filter 30 and the prevaporization filter 35, for example, a drying fan 15 is installed in the flow path between the vaporization filter 30 and the prevaporization filter 35, and the operation switch is turned off, and then a timer is used for about 1 hour. By rotating the drying fan 15, generation of mold on the vaporizing filter 30 and the pre-vaporizing filter 35 can be suppressed.

  In the electric fan according to the present invention, for example, a dustproof filter and an air purification filter may be installed on the upstream side of the vaporization filter 30 and the prevaporization filter 35. By doing so, the lifetime of the vaporizing filter 30 and the pre-vaporizing filter 35 can be extended, and clean air is discharged from the outlet 12. Further, the vaporization filter 30 and the prevaporization filter 35 may have a dustproof function and an air cleaning function. Furthermore, a prefilter made of polyester or modacrylic may be installed in the suction port 11.

  As shown in FIG. 1, the electric fan according to the present invention is provided with a cooling coil 50 as an indirect heat exchanger for further cooling the air that has passed through the vaporization filter 30 on the downstream side of the vaporization filter 30. . And the cooler (chiller 51) which cools the refrigerant | coolant which flows through the inside of a cooling coil is installed.

  The cooling of the air by the vaporization filter 30 is affected by the temperature of the air to be sucked (outside air temperature) and the temperature of water contained in the vaporization filter 30. If the outside air temperature rises, not only the air sucked from the suction port 11 but also the temperature of the water contained in the tank 41 rises, so that it becomes difficult to cool the air to a desired temperature. This is particularly noticeable in a large flow type electric fan having a large blade diameter. When the outside air temperature rises, it becomes difficult to feel coolness in the air ejected from the air outlet 12. On the other hand, as in the present invention, the cooling coil 50 is installed on the downstream side of the vaporization filter 30 and the cooling coil 50 is configured so that the coolant forcedly cooled by the chiller 51 can flow inside. Even if the temperature rises, it becomes easy to feel coolness by the air blown from the outlet 12. Further, as described above, at least the inner surface of the housing 10 is formed of a heat insulating material, and the vaporization filter 30 (and the pre-vaporization filter 35) and the tank 41 are formed inside the housing 10, so that the vaporization filter 30 (and the pre-vaporization filter). 35) and the temperature rise of the water in the tank 41 can be suppressed. In an electric fan having a conventional vaporization filter, the vaporization filter is exposed to the outside, and particularly when used outdoors or at the entrance of a building, it is exposed to direct sunlight. Although the temperature has greatly increased, the above configuration makes it less susceptible to the outside air temperature and direct sunlight.

  Specific examples of indirect heat exchangers include multi-tube heat exchangers, coil heat exchangers, plate heat exchangers, and spiral heat exchangers, which can be appropriately selected in consideration of cooling performance and the like. it can. As the chiller 51, for example, a relatively small one having a cooling power of 1 to 10 kW can be used. In addition, although the water cooled to about 2 degreeC is discharged | emitted from the chiller 51, since it is heated by the cooling coil 50 and becomes 10 degreeC or more, the problem of dew condensation does not arise easily. The chiller 51 generates heat. For example, the heat can be discharged by installing the exhaust heat fan 16a on the back surface of the casing 10 of the electric fan.

  In the electric fan according to the present invention, as shown in FIG. 1, a mist spraying device 60 is preferably installed around the outlet 12 on the downstream side of the axial fan 20. By carrying out like this, mist can be included in air and the temperature of the cold wind finally discharged | emitted from the blower outlet 12 can be lowered | hung.

  Even if the electric fan according to the present invention having the above-described configuration is a large flow rate type having a large blade diameter, it can efficiently blow out cold air.

  The electric fan of the present invention is mainly intended to exhibit the cooling function in addition to the air blowing function, but may be configured to exhibit the heating function instead of the cooling function by switching or the like. In that case, it can utilize effectively that the indirect heat exchanger is installed. That is, if the heater 52 which heats the heat medium which flows through the inside of an indirect heat exchanger is installed, the air which passes the indirect heat exchanger can be warmed. Furthermore, in order to directly heat the air, an external heater (electric heater 80 in FIG. 1) can be installed in the air flow path.

  Moreover, in order to implement | achieve the further efficient heating function, the hot air generator 70 and the hot air discharge part installed so that the hot air from the hot air generator 70 may be discharged | emitted along the rotation direction of the air by the axial flow fan 20 71. The hot air discharge unit 71 is preferably installed on the downstream side of the axial fan. By doing so, for example, the hot air of about 350 ° C. generated by the hot air generator 70 is discharged in a state in which it can easily ride on the air flow, so that the air heating efficiency is increased. As the hot air generator 70, for example, a heater with heating power of 5 to 15 kW can be used. Although heat is generated around the hot air generator 70, for example, by installing the exhaust heat fan 16b on the back surface of the housing 10 of the electric fan, it can be discharged to the outside.

  As an example of a specific structure of the hot air discharge portion 71, as shown in an enlarged view of FIG. 5, a hot air discharge hole 71b is formed in the ring-shaped pipe 71a, and the hot air discharge hole 71b is discharged around the hot air discharge hole 71b. The baffle plate 71c is installed so that hot air is discharged along the rotation direction of the ring. And the ring-shaped piping 51a used as the hot-air discharge part 71 is installed so that it may become the same axis | shaft as the axial flow fan 20. FIG. By doing so, when the hot air generated by the hot air generator 70 is discharged from the hot air discharge hole 71b of the ring-shaped pipe 71a, the effect of the baffle plate 71c is directed to the direction of air rotation by the axial flow fan 20. Become. Therefore, the hot air is discharged in a state where it can easily ride on the air flow, and the heating efficiency of the air is increased.

  In the case of heating operation, water is not normally supplied to the vaporization filter 30 and the pre-vaporization filter 35, but water may be supplied to the vaporization filter 30 and the pre-vaporization filter 35. When water is supplied to the vaporization filter 30 or the pre-vaporization filter 35, the heating efficiency is lowered, but the air can be humidified. Moreover, by introducing silver ion ceramic balls into the box 48 installed in the tank 41 containing water, the generation of bacteria can be suppressed and the air cleaning function can be exhibited. By using a germicidal lamp instead of the silver ion ceramic ball, the generation of bacteria can be suppressed and the air cleaning function can be exhibited. The position where the germicidal lamp is installed may be in the tank 41 or in the middle of the water supply pipe 42.

  By having the above-described configuration, hot air can be efficiently blown out even with a large flow rate type having a large blade diameter.

  By installing, for example, a caster with a lock mechanism in the lower part of the casing 10 of the electric fan according to the present invention, a movable electric fan is obtained. Moreover, it becomes an all-weather type electric fan by setting it as the structure which can store the switches for operating the electric fan based on this invention inside.

DESCRIPTION OF SYMBOLS 10 Housing | casing 11 Inlet 12 Outlet 15 Drying fan 16a Exhaust heat fan 16b Exhaust heat fan 20 Axial fan 30 Evaporation filter 35 Pre-evaporation filter 40 Water supply system 41 Water tank 42 Water supply piping 42a Sprinkling part 42b Sprinkling Unit 45 chiller 46 cooling unit 48 box 50 cooling coil 51 chiller 52 heater 60 mist spraying device 70 hot air generator 71 hot air discharge unit 71a ring-shaped pipe 71b hot air discharge hole 71c baffle plate 80 electric heater

Claims (5)

A housing formed with an air inlet and an air outlet;
An axial fan for sucking air into the housing from the suction port and blowing out the sucked air from the air outlet;
A vaporization filter that allows the air sucked from the suction port to pass through;
A water supply system capable of supplying water to the vaporization filter;
An indirect heat exchanger installed on the downstream side of the vaporization filter for cooling the air that has passed through the vaporization filter;
Possess a cooler for cooling the refrigerant of the indirect heat exchanger,
The inlet and the outlet are formed on the same side with respect to the housing,
The air outlet, the being formed on the side surface center portion of the housing, said suction port, fan that is formed on the outer edge of the air outlet. A pre-vaporization filter that is installed on the upstream side of the vaporization filter and allows the air sucked from the suction port to pass through;
The electric fan according to claim 1, wherein the water supply system is capable of supplying the water to the pre-vaporization filter. The electric fan according to claim 1 or 2 , further comprising a mist spraying device installed around the air outlet. The electric fan according to any one of claims 1 to 3 , wherein a blade diameter of the axial flow fan is 20 to 50 inches. The electric fan according to any one of claims 1 to 4 , wherein an air flow rate during operation is 3500 to 35000 m ³ / h.

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