Large space cooling device

Abstract

To provide a large space temperature decreasing device which can effectively decrease a temperature of a large space, such as a factory, a warehouse, and a large scale commercial facility, at low costs.SOLUTION: A large space temperature decreasing device 1 includes: a ceiling fan 3 which is attached to a ceiling etc. of a space whose temperature is decreased (a temperature decreased space) to rotate rotary vanes 9 and thereby stir air in the temperature decreased space; and mist spray devices 5 each of which sprays water from nozzles 17 in a mist form. The nozzle 17 is disposed below the rotary vane 9 so as to spray the mist.SELECTED DRAWING: Figure 1

Description

[Technical field]

[0001] The present invention relates to a large space temperature reducing device for reducing the temperature of a large space such as a factory, a warehouse, or a large commercial facility. [Background technology]

[0002] 2. Description of the Related Art As a device for lowering the temperature in a space where people gather, for example, there is a temperature-lowering spray system disclosed in Patent Document 1. This temperature-lowering spray system is composed of a spray nozzle installed at or near the entrance of a facility that attracts customers, a pump that supplies pressurized water to the spray nozzle, and a water distribution pipe through which the pressurized water is distributed from the pump to the spray nozzle. Mist is sprayed from the spray nozzle, and the latent heat associated with the evaporation of the mist cools the facility.

[0003] Furthermore, as a device for improving comfort in large spaces, there are ceiling fans that are attached to ceilings of factories, warehouses, sports facilities, large commercial facilities, and the like. Ceiling fans do not have the effect of lowering the temperature in a space, but by creating air flow in the space, they can make people less likely to feel uncomfortable even when the temperature is relatively high, and by circulating the air, they can increase the efficiency of heating, cooling, and humidity control by air conditioning equipment. [Prior art documents] [Patent documents]

[0004] [Patent Document 1] Patent No. 4639330 [Patent Document 2] JP 2019-74029 A Summary of the Invention [Problem to be solved by the invention]

[0005] The temperature-lowering spray system of Patent Document 1 can lower the temperature of a space by about 2°C (see paragraph

[0029] of Patent Document 1), but it is difficult to lower the temperature further. Also, in places such as warehouses and factories where items that must not get wet, such as cardboard boxes, are stored, the amount of mist that can be sprayed is limited, and it is difficult to expect a greater temperature drop.

[0006] On the other hand, ceiling fans do not have the problem of getting wet from mist, but you cannot expect them to lower the temperature. Of course, when used in conjunction with air conditioning equipment such as air conditioners, you can expect the temperature to be lowered uniformly throughout the room, but this requires expensive air conditioning equipment, and you cannot expect the temperature to drop beyond the capacity of the air conditioning equipment.

[0007] The present invention has been made to solve such problems, and has an object to provide a large-space temperature reducing device that can inexpensively and effectively reduce the temperature of large spaces such as factories, warehouses, and large commercial facilities. [Means for solving the problem]

[0008] (1) The large-space cooling device of the present invention comprises a ceiling fan that is attached to the ceiling or the like of the space to be cooled and rotates a rotor to agitate the air in the space to be cooled, and a mist sprayer that turns water into a mist and sprays it from a nozzle, the nozzle being positioned so that the mist can be sprayed below the rotor.

[0009] (2) Furthermore, in the above-mentioned (1), it is characterized in that it has a support member whose one end side is supported by the ceiling or the like and whose other end side extends below the rotor, and the nozzle is supported on the other end side of the support member directly or via another member. Effect of the Invention

[0010] The large space cooling device of the present invention comprises a ceiling fan that is attached to the ceiling, etc. of the space to be cooled and rotates a rotor to agitate the air in the space to be cooled, and a mist sprayer that turns water into a mist and sprays it from a nozzle.By positioning the nozzle so that the mist can be sprayed below the rotor, it is possible to inexpensively and effectively lower the temperature of large spaces such as factories, warehouses, large commercial facilities, etc. [Brief description of the drawings]

[0011] [Figure 1] 1 is a front view of a large space temperature reducing device according to an embodiment of the present invention in an installed state. [Diagram 2] FIG. 2 is a diagram showing the large-space temperature reducing apparatus shown in FIG. 1 as viewed from below. [Diagram 3] FIG. 2 is an enlarged right side view of a large space temperature reducing device according to an embodiment of the present invention in an installed state. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0012] As shown in Figures 1 to 3, a large-space temperature reduction device 1 according to one embodiment of the present invention includes a ceiling fan 3 that is attached to the ceiling or the like of the space to be cooled, and a mist sprayer 5 that turns water into a mist and sprays it from a nozzle. Each component will be described in detail below.

[0013] <Space to be cooled> The space to be cooled by the large space cooling device 1 of the present invention is not particularly limited, but is suitable for large indoor spaces such as factories, warehouses, sports facilities, large commercial facilities, etc., where it is desired that the mist be kept dry (i.e., does not wet people or objects). In addition, in the case of a factory or the like, the ceiling fan 3 may not have a ceiling surface and the ceiling may be made up of beams 7 etc., and in this specification, the term ceiling etc. includes beams, frames etc. located above and below the roof, facing the floor surface.

[0014] <Ceiling fan> The ceiling fan 3 is attached to the ceiling or the like of the space to be cooled, and includes a mounting part 6 for mounting to the ceiling or the like, a motor (not shown), and a rotor 9 that is rotationally driven by the motor.

[0015] In this embodiment, five rotors 9 are provided at equal intervals in the rotation direction as shown in Fig. 2. However, the number, size (width and length), shape, etc. of the rotors 9 of the large space temperature dropping device 1 according to the present invention are not particularly limited, and may be appropriately set in consideration of various conditions such as the size of the space to be cooled and the installation height.

[0016] Ceiling fans 3 are installed on the ceiling or other surfaces inside a room, and differ from ventilation fans in that the outer diameter of the rotation path of the rotor 9 (hereinafter referred to as the "rotor path") is 1.8 m to 3 m to 8 m, and the rotation speed is 1 to 220 rpm, and mainly 60 to 75 rpm.

[0017] <Mist spray device> The mist sprayer 5 sprays water in a mist form, and is equipped with a water supply pipe 11 that supplies pressurized water, a header 13 provided at the end of the water supply pipe 11, multiple (six) branch pipes 15 branching off from the header 13, and nozzles 17 attached to the end of each branch pipe 15 to spray the mist. In the mist spraying device 5 of this embodiment, the header 13, the branch pipe 15, and the nozzle 17 are unitized as a dry mist unit 19. However, the mist spraying device 5 according to the present invention is not limited to such a unitized device.

[0018] The nozzle 17 is attached by fixing the water supply pipe 11 to the nozzle attachment member 21, and is positioned so as to be able to spray mist below the rotor blades 9 of the ceiling fan 3. In addition, "below the rotor 9" as the position where the mist is sprayed includes not only the inside of the circle which is the rotor trajectory of the rotor 9, but also the area below the outside of the circle. Conversely, the areas not included in "below the rotor 9" are as follows: (i) At the same height as the rotor 9, but not including the immediate vicinity of the rotor 9. If the mist is sprayed at this position, the mist may adhere to the rotor 9 or nozzle 17 before being vaporized by the suction force of the rotor 9 or turbulence, and may fall as water droplets. In other words, the immediate vicinity of the rotor 9 means a distance close enough that the mist adheres to the rotor 9 or nozzle 17 as water before being vaporized by the suction force of the rotor 9 or turbulence. (ii) The area directly above the rotor 9 (inside the circle that is the rotation path of the rotor 9) is not included. If mist is sprayed in this position, regardless of the distance from the rotor 9, the mist may adhere to the rotor 9 and other parts of the ceiling fan 3 (fixed parts, etc.) before being vaporized by the suction force of the rotor 9, and may fall as water droplets.

[0019] The nozzle mounting member 21 is composed of an L-shaped member whose one end is supported by a ceiling or the like and whose other end extends below the rotor 9, and in this embodiment, the nozzle unit is attached to the other end of the nozzle mounting member 21.

[0020] In this embodiment, two dry mist units 19 are provided facing each other in the diameter direction of the circle that is the trajectory of the rotor blades of the ceiling fan 3, but the number of dry mist units 19 is not limited to this and may be one or three or more. Further, regarding the number of nozzles 17 provided in the dry mist unit 19, an example in which six nozzles are provided is shown in this embodiment, but the number is not limited to this, and may be one or a number other than six.

[0021] The structure and function of the nozzle 17 are not particularly limited, but may be of a type such as that disclosed in Patent Document 1, for example. That is, it comprises a pressurized water receiving cavity, a pressure-sensitive check valve, a jet generating cavity, and an orifice formed within a substantially cylindrical housing, and when pressurized water is poured into the pressurized water receiving cavity and the water pressure reaches a predetermined value, the pressure-sensitive check valve opens and the pressurized water becomes a collision jet in the jet generating cavity and is sprayed from the orifice as a mist.

[0022] Mist is a water droplet with a small diameter, and the average particle diameter is preferably about 8 to 160 μm. If the spray water pressure is low, the average particle diameter of the mist becomes large and the spray flow rate decreases, resulting in a smaller cooling effect. On the other hand, if the spray water pressure is high, the average particle diameter of the mist becomes small and the spray flow rate increases, resulting in a stronger cooling effect. However, if the spray water pressure is too high, large shock waves are applied to the piping, etc., which is undesirable from a safety standpoint, so the spray water pressure is preferably between 0.5 MPa and 10 MPa.

[0023] The method for measuring the average particle size of the mist is, for example, the volume area average particle size (referred to as the Sauter mean diameter) measured by a laser diffraction method at a point 50 mm away from the tip of the orifice on the central axis of the nozzle 17, as shown in Patent Document 1. In the laser diffraction method, a laser diffraction particle size measuring device (Malvern Instruments, Master Size-S model, laser used: He-Ne laser) is used to measure five times in the same manner, and the average value is used as the average particle size of the mist.

[0024] The operation of the large space temperature reducing apparatus 1 of this embodiment configured as above will be described. Mist is sprayed from nozzle 17 at the same time as ceiling fan 3 rotates. The rotation of ceiling fan 3 creates a downward air current in the space on both sides of ceiling fan 3, and the mist is carried by this air current and diffuses over a wide area, exerting a high transpiration effect and quickly lowering the temperature in the space.

[0025] In the case of spraying mist alone, as disclosed in the above-mentioned Patent Document 1, the temperature drop is about 2°C, but with the large space temperature lowering device 1 of this embodiment, a temperature drop of 5°C to 6°C can be obtained. That is, the ceiling fan 3 alone does not have the function of lowering the temperature, and spraying mist alone only lowers the temperature by about 2°C, but in this embodiment, which combines these appropriately, a large temperature drop of 5°C to 6°C can be achieved.

[0026] The reason why such a large temperature drop is possible is believed to be that the mist is carried by the downward current from the ceiling fan 3, creating a high evaporation effect, which in turn increases the amount of mist that can be sprayed due to the drop in humidity, and the synergistic effect of the temperature drop throughout the space caused by circulating the cooled air.

[0027] It should be noted that the ceiling fan 3 and the mist spraying do not necessarily have to occur at the same time; the ceiling fan 3 may be operated intermittently to spray the mist continuously, or conversely, the ceiling fan 3 may be operated continuously to spray the mist intermittently. Even if the ceiling fan 3 is operated intermittently, a certain degree of effectiveness can be obtained in some indoor spaces where the ceiling fan 3 creates an air current in the room. Also, in order to prevent the mist from falling as water droplets, it may be better to spray the mist intermittently. [Explanation of symbols]

[0028] 1 Large space cooling device 3. Ceiling Fan 5. Mist spray device 6 Mounting part 7 Beam 9 Rotor 11 Water supply piping 13 Header 15 branch pipe 17 Nozzle 19 Dry mist unit 21 Nozzle mounting member

Claims

[Claim 1] The ceiling fan is attached to a beam or frame below a roof and above the ceiling or floor surface of the space to be cooled, and rotates a rotor to agitate the air in the space to be cooled; and a mist spraying device is provided that sprays water from a nozzle in the form of a mist. The rotor has an outer circumferential diameter of a rotation path of 1.8 m to 8 m and a rotation speed of 1 to 220 rpm. The mist spraying device has an L-shaped support member whose upper end is supported by a beam or frame located above and facing the ceiling or floor surface and below the roof, and whose lower end extends below the rotor from the outside to the inside of the circle that is the rotational trajectory of the rotor, and the nozzle is supported on the lower end of the support member directly or via another member, and the nozzle is capable of spraying mist downward. This large space cooling device is characterized in that it is configured.

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