JP2022181760A - Air conditioner and heat radiation fins - Google Patents

Abstract

To achieve downsizing of an air conditioner.SOLUTION: An air conditioner according to an embodiment includes: a peltier element; a power source; heat radiation fins; and a blower. The peltier element converts electric power into heat. The power source supplies electric power to the peltier element. The heat radiation fins radiate heat emitted from the peltier element. The blower supplies air to the heat radiation fins.SELECTED DRAWING: Figure 2

Description

An embodiment of the present invention relates to an air conditioner and a heat radiation fin.

BACKGROUND ART Many air conditioners such as indoor air conditioners and automotive air conditioners (for example, Patent Document 1) have a heat cycle consisting of a compressor with a driving pump, a condenser, an expansion valve, and an evaporator.

JP-A-61-94811

However, since an air conditioner with a heat cycle requires a drive pump, a compressor, a condenser, an expansion valve, and a pipe for circulating the refrigerant, it has been difficult to downsize the air conditioner.

The present invention has been made under the circumstances described above, and an object of the present invention is to reduce the size of an air conditioner.

In order to solve the above problems, an air conditioner according to an embodiment includes a Peltier element, a power supply, heat radiation fins, and a blower. Peltier devices convert electrical power into heat. A power supply supplies power to the Peltier element. The radiation fins radiate heat generated from the Peltier element. A blower supplies air to the radiation fins.

1 is a configuration diagram of an air conditioner according to Embodiment 1. FIG. FIG. 2 is a perspective view of a heat radiating fin according to Embodiment 1; 4 is a plan view of the heat radiation fins according to Embodiment 1. FIG. 4 is a side view of the heat radiation fins according to Embodiment 1. FIG. FIG. 8 is a plan view of a heat radiating fin according to Embodiment 2;

(Embodiment 1)
Hereinafter, air conditioners according to embodiments will be described with reference to the drawings. In the description, an XYZ coordinate system consisting of mutually orthogonal X, Y, and Z axes is appropriately used.

FIG. 1 is a configuration diagram of an air conditioner 1 according to an embodiment. The air conditioner 1 has a Peltier element 10 , a power supply 20 , a radiation fin 30 , a blower 50 and a housing 70 .

The Peltier element 10 generates a temperature difference between both sides of the element by being supplied with a direct current. The dimensions of the Peltier element are determined according to the heating or cooling capacity.

A power supply 20 supplies a direct current to the Peltier element 10 . The power supply 20 is, for example, an AC/DC converter that receives commercial power of 100 volts and outputs a DC voltage. The power supply 20 outputs a DC voltage that meets the standards of the Peltier element 10 . Here, it is assumed that the power supply 20 supplies electric power so that the surface on the +Z side of the Peltier element 10 becomes hotter than the surface on the -Z side. Also, the power supply 20 supplies electric power to the blower 50 which will be described later.

The radiation fins 30 are components for radiating heat generated from the Peltier element 10 . The radiation fins 30 are provided so that the −Z side surface of the radiation fins 30 is in contact with the +Z side surface of the Peltier element 10 . The dimensions of the XY plane of the radiation fins 30 are determined according to the dimensions of the XY plane of the Peltier element 10 . The Z-direction dimension of the radiation fins 30 is determined according to the amount of heat emitted from the Peltier element 10 .

The blower 50 supplies air to the radiating fins 30 by wind. The blower 50 is, for example, a fan that operates with a DC motor. The blower 50 is arranged on the −X side of the radiation fins 30 .

The housing 70 is a member for fixing the Peltier element 10, the power supply 20, and the blower 50. As shown in FIG. The housing 70 may be a flat plate, or may be a case that accommodates the Peltier element 10, the power supply 20, the heat radiation fins 30, and the blower 50. FIG. The radiation fins 30 may be fixed to the housing 70 so that the weight of the radiation fins 30 is not applied to the Peltier element 10 .

FIG. 2 is a perspective view of the radiating fins 30. As shown in FIG. FIG. 3 is a plan view of the radiation fins 30. FIG. FIG. 4 is a side view of the radiation fin 30 on the YZ plane. The radiation fin 30 is composed of a plurality of fins 32 , 33 , 34 , 35 , 36 and 37 and a base 31 . Fins 32 , 33 , 34 , 35 , 36 , 37 are fixed to base 31 . Here, the case where the radiation fins 30 are composed of six fins will be described, but the number of fins is not limited. The plurality of fins 32 , 33 , 34 , 35 , 36 , 37 are arranged so as to form an air flow path R from upstream to downstream in the blowing direction of the air supplied by the blower 50 .

As shown in FIG. 3, the fins 32, 33, 34, 35, 36, and 37 are shaped such that the length L1 of the opening 41 in the Y-axis direction is shorter than the length L2 of the opening 42 in the Y-axis direction. It is As a result, the cross-sectional area of the YZ plane of the air flow path R widens from the upstream (−X side) to the downstream (+X side) in the air blowing direction.

Further, as shown in FIG. 2, at the ends of the fins 32, 33, 34, 35, 36, and 37 on the -X side (upstream side in the air blowing direction), the cross-sectional area of the air flow path R is A tapered surface 43 is formed to expand. In FIG. 4, the tapered surface 43 is represented by a dot pattern. As shown in FIG. 3, by providing the tapered surfaces 43 on the fins 32, 33, 34, 35, 36, and 37, the length L3 of the -X side end of the opening 41 in the Y-axis direction becomes It is slightly longer than the length L1 in the Y-axis direction on the +X side. As a result, the cross-sectional area of the YZ plane of the opening 41 for taking in air is increased.

Next, operation of the air conditioner 1 will be described. The Peltier element 10 is supplied with a direct current from the power supply 20, and the temperature of the +Z surface rises with respect to the temperature of the -Z surface. The amount of heat generated from the +Z side surface of the Peltier element 10 propagates to the heat radiation fins 30 and is radiated from the heat radiation fins 30 . The blower 50 is supplied with power from the power supply 20 and blows air toward the radiation fins 30 .

The air received in the range of L3 shown in FIG. Since the radiation fins 30 have tapered surfaces 43 , a large amount of air can be guided to the openings 41 . The cross-sectional area of the opening 42 on the +X side of the radiation fin 30 is larger than the cross-sectional area of the opening 41 on the -X side. With such a structure, the air resistance between the air flowing from the opening 41 to the opening 42 and the radiating fins 30 is reduced. The temperature of the air inserted from the opening 41 rises due to the heat of the radiation fins 30 (fins 32, 33, 34, 35, 36, 37), and the radiation fins 30 are cooled. The air whose temperature has risen is blown toward the opening 42 by the blower 50 .

Fresh air is sequentially supplied to the openings 41 of the radiation fins 30 by the blower 50 . The radiating fins 30 , whose temperature has increased due to the amount of heat generated by the Peltier element 10 , heats new air, and the heated air is sequentially discharged from the openings 42 . By continuing this operation, the air conditioner 1 raises the ambient temperature.

In the above description, the temperature of the +Z side surface of the Peltier element 10 is higher than the temperature of the -Z side surface. The temperature of the +Z side surface of the element 10 can also be lower than the temperature of the -Z side surface. In this case, the radiation fins 30 propagate cold temperature from the Peltier element 10 to cool the air.

In the above description, as shown in FIGS. 2 to 4, the +Z side surface and the -Z side surface of the fins 32, 33, 34, 35, 36, and 37 have the same shape as an example. However, the shape of the fins is not limited to this. For example, the fins may have a shape that is thinner toward the +Z side.

In the above description, the case where the power source 20 is an AC/DC converter has been described, but the power source 20 may be a DC/DC converter that operates with a storage battery, or the power source 20 may be a storage battery.

As described above, the air conditioner 1 according to the embodiment does not require a drive pump, a compressor, a condenser, an expansion valve, and a heat cycle that requires pipes for circulating the refrigerant. can be improved.

In addition, since the air conditioner 1 according to the embodiment has no moving parts such as a drive pump, it does not generate vibration or noise. In addition, since the air conditioner 1 according to the embodiment has no mechanical parts that are subject to fatigue or breakage, it is easy to handle, less likely to break down, and has a long service life.

In addition, since the air conditioner 1 according to the embodiment does not use a refrigerant such as Freon, there is no adverse effect on the environment. In addition, there is no risk of refrigerant gas leakage, corrosive liquid leakage, etc., and maintenance is easy.

Also, the air conditioner 1 according to the embodiment can switch between heating and cooling by simply changing the direction of the current. In addition, since the air conditioner 1 according to the embodiment performs cooling and heating with a Peltier element, it does not take time to heat or cool the refrigerant, so the temperature response characteristics are good.

The temperature of the air gradually increases from the upstream (-X side) toward the downstream (+X side) in the air blowing direction. In the air conditioner 1 according to the embodiment, the cross-sectional area of the air flow path R of the heat radiating fins 30 widens from the upstream (−X side) to the downstream (+X side) in the air blowing direction. , 33, 34, 35, 36, 37, the amount of air that cools the unit area is large. Therefore, the air conditioner 1 according to the embodiment can reduce the temperature rise of the air downstream in the blowing direction, and can enhance the heat dissipation effect.

Moreover, since the heat radiation fins 30 have the tapered surface 43 so as to widen the cross-sectional area of the air flow path R on the upstream side in the air blowing direction, a large amount of air can be guided to the openings 41 .

(Embodiment 2)
In Embodiment 2, another embodiment of the radiation fins 30 will be described with reference to FIG. Descriptions that are the same as in the first embodiment are omitted.

FIG. 5 is a plan view of the radiating fins 30 according to the second embodiment. As shown in FIG. 5, the fins 32, 33, 34, 35, 36, and 37 of the radiation fins 30 are composed of a plurality of small fins arranged in the air blowing direction (X-axis direction). The fins 32 are composed of small fins 321 , 322 , 323 , 324 and 325 . The fins 33, 34, 35, 36, 37 are also composed of five small fins. Here, the case where each of the fins 32, 33, 34, 35, 36, and 37 is composed of five small fins will be described, but the number of small fins is not limited.

The fins 32, 33, 34, 35, 36, and 37 of the radiating fin 30 can increase the contact area with the air by forming each of the fins 32, 33, 34, 35, 36, and 37 with a plurality of small fins, and can enhance the radiating effect.

While several embodiments of the invention have been described, these embodiments have been presented by way of example and are not intended to limit the scope of the invention. These novel embodiments can be implemented in various other forms, and various omissions, replacements, and modifications can be made without departing from the scope of the invention. These embodiments and their modifications are included in the scope and gist of the invention, and are included in the scope of the invention described in the claims and its equivalents.

DESCRIPTION OF SYMBOLS 1... Air conditioner 10... Peltier element 20... Power supply 30... Radiation fin 31... Base 32-37... Fin 321-325... Small fin 371-375... Small fin 41... Opening 42... Opening 43... Tapered surface 50... Blower

In order to solve the above problems, an air conditioner according to an embodiment includes a Peltier element, a power supply, heat radiation fins, and a blower. Peltier devices convert electrical power into heat. A power supply powers the Peltier element. The radiation fins radiate heat generated from the Peltier element. A blower supplies air to the radiating fins. A heat radiation fin is composed of a plurality of fins. The plurality of fins are arranged so as to form an air flow path from upstream to downstream in the blowing direction of the air supplied by the blower. The cross-sectional area of the air flow path widens from upstream to downstream in the air blowing direction. The plurality of fins has a tapered surface so as to widen the cross-sectional area of the air flow path on the upstream side in the air blowing direction.

Claims (7)

a Peltier device that converts electric power into heat;
a power source that supplies power to the Peltier element;
a heat dissipation fin for dissipating heat emitted from the Peltier element;
a blower that supplies air to the radiation fins;
Air conditioner with. The heat radiation fin is composed of a plurality of fins,
The plurality of fins are arranged so as to form a flow path for the air from upstream to downstream in the air blowing direction of the air supplied by the blower,
2. The air conditioner according to claim 1, wherein the cross-sectional area of the flow path for the air increases from upstream to downstream in the blowing direction of the air. 3. The air conditioner according to claim 2, wherein the plurality of fins have a tapered surface so as to widen the cross-sectional area of the flow path of the air toward the upstream side in the blowing direction of the air. 4. The air conditioner according to claim 3, wherein said plurality of fins are formed of a plurality of small fins arranged in the blowing direction of said air. Consists of multiple fins
The plurality of fins are arranged so as to form a flow path for the air from upstream to downstream in the blowing direction of the air supplied by the blower,
The radiating fin, wherein the cross-sectional area of the flow path for the air is widened from upstream to downstream in the blowing direction of the air. 6. The heat dissipating fin according to claim 5, wherein said plurality of fins have a tapered surface on the upstream side in the blowing direction of said air. 7. The heat radiation fin according to claim 6, wherein said plurality of fins are formed of a plurality of small fins arranged in the blowing direction of said air.

Images