Electric dust collection device and outdoor unit of air conditioner

Abstract

To provide an electric dust collection device efficiently eliminating dust particles included in suction air while suppressing pressure loss, and to provide an outdoor unit of an air conditioner.SOLUTION: An electric dust collection device includes: a plurality of charged electrode plates parallely disposed on a frame body; and an application terminal provided to the frame body and applying high voltage to the charged electrode plates. The frame body is detachably attached so as to face an outdoor heat exchanger of an outdoor unit. As a result, such a structure can negatively charge dust particles included in suction air by corona discharge generated toward the outdoor heat exchanger from the charged electrode plates.SELECTED DRAWING: Figure 3

Description

[Technical Field]

[0001] The present disclosure relates to an electrostatic precipitating device and an outdoor unit of an air conditioner. [Background technology]

[0002] Patent Document 1 discloses an air conditioner in which an air purification filter is installed at the air intake port of the outdoor unit, and when the outdoor unit is driven, dust and other particles contained in the intake air are removed. [Prior art documents] [Patent documents]

[0003] [Patent Document 1] Japanese Patent Application Laid-Open No. 2007-155306 Summary of the Invention [Problem to be solved by the invention]

[0004] The present disclosure provides an electrostatic precipitator device and an outdoor unit for an air conditioner that can suppress pressure loss and efficiently remove dust particles contained in suction air. [Means for solving the problem]

[0005] The electrostatic dust collecting device of the present disclosure comprises a plurality of charged electrode plates arranged in parallel on a frame body, and application terminals provided on the frame body for applying a high voltage to the charged electrode plates, and the frame body is detachably attached opposite an outdoor heat exchanger of an outdoor unit.

[0006] An outdoor unit of an air conditioner according to the present disclosure is equipped with an electric dust collecting device according to any one of claims 1 to 5. [Effects of the Invention]

[0007] According to the present disclosure, a high voltage is applied to the charging electrode plates via the application terminals to generate corona discharge, thereby negatively charging dust particles contained in the intake air. Furthermore, because the air drawn into the outdoor unit simply passes between the charging electrode plates, pressure loss and other issues can be reduced. [Brief explanation of the drawings]

[0008] [Figure 1] FIG. 1 is a perspective view of an outdoor unit of an air conditioner and an electric dust collecting device according to a first embodiment. [Figure 2] FIG. 1 is a perspective view showing a state in which an electric dust collecting device is attached to an outdoor unit according to a first embodiment. [Figure 3] FIG. 1 is a perspective view showing an electric dust collecting device according to a first embodiment. [Figure 4] 1 is a side view of a portion of an electric dust collecting device according to a first embodiment. [Figure 5] FIG. 1 is a partial plan view showing an electric dust collecting device according to a first embodiment; [Figure 6] An explanatory plan view showing the dust collection operation by an electrostatic precipitator device. [Figure 7] An explanatory side view showing the dust collection operation by the electrostatic precipitator device. [Figure 8] Schematic configuration diagram showing a modified example of the present disclosure. DETAILED DESCRIPTION OF THE INVENTION

[0009] (Findings that formed the basis of this disclosure) At the time the inventors came up with the idea for this disclosure, air conditioners were already known that had an air purification filter installed at the air intake port of the outdoor unit, so that dust and other particles contained in the intake air were removed when the outdoor unit was operated. However, when a filter is used as in conventional technology, there is a problem that the filter becomes clogged not only initially but also during operation of the air conditioner, resulting in a large loss of air suction pressure and adversely affecting the operating efficiency of the air conditioner. The inventors discovered a problem that, particularly when used in environments with severe air pollution such as India and Vietnam, the filter becomes clogged frequently, making it impractical due to the effort and running costs required for filter replacement, and have come to constitute the subject matter of the present disclosure in order to solve this problem. Therefore, the present disclosure provides an electrostatic precipitator device and an outdoor unit for an air conditioner that can suppress pressure loss and efficiently remove dust particles contained in suction air.

[0010] Hereinafter, embodiments will be described in detail with reference to the drawings. However, unnecessary detailed description may be omitted. For example, detailed description of well-known matters or redundant description of substantially the same configuration may be omitted. This is to avoid unnecessary redundancy in the following description and to facilitate understanding by those skilled in the art. The accompanying drawings and the following description are provided to enable those skilled in the art to fully understand the present disclosure, and are not intended to limit the subject matter described in the claims.

[0011] (Embodiment 1) Hereinafter, the first embodiment will be described with reference to the drawings. [1-1.Configuration] [1-1-1.Outdoor unit configuration] Fig. 1 is a perspective view of an outdoor unit of an air conditioner and an electric dust collecting device according to the present embodiment, Fig. 2 is a perspective view showing a state in which an electric dust collecting device is attached to the outdoor unit according to embodiment 1. The outdoor unit 10 of this embodiment includes a box-shaped housing 11. The housing 11 accommodates a compressor (not shown), an expansion valve (not shown), an outdoor heat exchanger 12, an outdoor fan (not shown), and the like. The outdoor unit 10 is connected to an indoor unit (not shown) via refrigerant piping, and a refrigeration cycle circuit is formed, which is composed of a compressor, an expansion valve, an outdoor heat exchanger 12, and an indoor heat exchanger provided in the indoor unit. The refrigerant is circulated through the refrigeration cycle circuit to air-condition the space to be air-conditioned in which the indoor unit is installed.

[0012] As shown in Fig. 1, an outdoor heat exchanger 12 is disposed exposed on the front side of the housing 11. The outdoor heat exchanger 12 is a so-called fin-and-tube type heat exchanger. That is, the outdoor heat exchanger 12 is composed of a plurality of fins 13 and refrigerant piping (not shown) that runs between the fins 13. The portion of the housing 11 where the outdoor heat exchanger 12 is exposed serves as an outdoor air inlet 14 . The outdoor unit 10 of this embodiment is a so-called side flow type or horizontal blowing type outdoor unit 10 that draws in air, exchanges heat between the air and the refrigerant flowing through the outdoor heat exchanger 1240, and blows the air out from the other side. By driving the outdoor fan arranged on the back side of the outdoor heat exchanger 12, outside air is taken in through the intake port 14, and heat exchange can be performed between the outside air passing through the outdoor heat exchanger 12 and the refrigerant.

[0013] [1-1-2. Configuration of the electrostatic precipitator device] Next, the configuration of the electrostatic precipitator device will be described. Fig. 3 is a perspective view showing an electric dust collecting device in embodiment 1. Fig. 4 is a side view of a portion showing an electric dust collecting device in embodiment 1. Fig. 5 is a plan view of a portion showing an electric dust collecting device in embodiment 1.

[0014] 3, electrostatic precipitating device 20 has a rectangular frame 21. Frame 21 is formed to be approximately the same as or larger than the outer shape of suction port 14 of outdoor unit 10, and electrostatic precipitating device 20 is configured to cover suction port 14 when attached to outdoor unit 10.

[0015] 4 and 5, a plurality of charging electrode plates 22 are arranged inside the frame 21. Each of the charging electrode plates 22 is formed in the shape of a long, narrow plate extending in the vertical direction. The charging electrode plates 22 are arranged at predetermined intervals in the horizontal direction. As shown in Fig. 4, a sawtooth-shaped uneven portion 23 is formed on the side edge exposed to the outside of each charging electrode plate 22. The uneven portion 23 has a shape in which arc-shaped recesses 24 and protrusions 25 formed between each recess 24 are formed alternately and continuously. The protrusions 25 have an interior angle of, for example, about 30°, and are formed at a pitch of 16 mm between the protrusions 25. The interval between the charging electrode plates 22 is set to, for example, 20 mm plus or minus several mm.

[0016] As shown in FIG. 3, one or more application terminals 26 for applying a high voltage to the charging electrode plate 22 are provided on both side surfaces of the frame 21. As shown in FIGS. 4 and 5, adjusters 27 are provided at the four corners of the frame 21 to regulate the distance from the outdoor heat exchanger 12. 2, the electrostatic precipitating device 20 is attached to the air outlet portion of the outdoor unit 10 by a band 30. The electrostatic precipitating device 20 is installed so that the concave-convex portion 23 faces the outdoor heat exchanger 12 of the outdoor unit 10. At this time, a packing 28 is provided between the electric dust collecting device 20 and the outdoor unit 10, and the packing 28 allows the frame body 21 of the electric dust collecting device 20 to be attached in close contact with the outdoor unit 10. With the electric dust collecting device 20 attached to the outdoor unit 10, the distance between the protrusions 25 of the uneven portion 23 and the fins 13 of the outdoor heat exchanger 12 is set to, for example, about 5 to 7 mm.

[0017] The intervals between the charged electrode plates 22 and the distance between the protrusions 25 of the uneven portion 23 and the fins 13 of the outdoor heat exchanger 12 are not limited to the above-mentioned values. The dust particle collection efficiency varies depending on a combination of factors such as the charge amount of the charging electrode plates, the time the dust particles remain in the charging space, and the length of the charging electrode plates. Therefore, it is preferable to appropriately set the spacing between the charging electrode plates 22 and the distance between the protrusions 25 of the uneven portion 23 and the fins 13 of the outdoor heat exchanger 12 so as to maximize the dust collection efficiency, taking into consideration the voltage and current values ​​that can be applied to the charging electrode plates.

[0018] [1-2. Effect] Next, the operation of the first embodiment will be described. A predetermined voltage and current are applied to the electrostatic precipitating device 20 via the application terminal 26. The voltage and current values ​​are appropriately set in consideration of the dust particle collection rate. At this time, the charged electrode plate 22 is set to a negative electrode, and the fins 13 of the outdoor heat exchanger 12 are set to a positive electrode.

[0019] Fig. 6 is an explanatory plan view showing the dust collection operation by the electric dust collecting device 20. Fig. 7 is an explanatory side view showing the dust collection operation by the electric dust collecting device 20. 6 and 7, when power is supplied to the charging electrode plate 22, a corona discharge C is generated from the protrusion 25 of the charging electrode plate 22 toward the fins 13 of the outdoor heat exchanger 12. When the corona discharge C is generated, negative ions 40 are generated between the charging electrode plate 22 and the fins 13. The negative ions 40 negatively charge dust particles 41 contained in the air passing between the charging electrode plates 22 of the electrostatic precipitator 20, and the negatively charged dust particles 41 are attached to the surfaces of the fins 13, which are positive electrodes.

[0020] By this operation, dust particles 41 contained in the air passing between the charging electrode plates 22 are negatively charged when passing through the corona discharge C, so that the dust particles 41 in the air can be efficiently collected. Dust particles 41 adhering to the surfaces of the fins 13 of the outdoor heat exchanger 12 are automatically removed by moisture flowing over the surfaces of the fins 13 due to condensation or defrosting of the outdoor heat exchanger 12 .

[0021] [1-3. Effects, etc.] As described above, the electric dust collecting device 20 in this embodiment comprises a plurality of charged electrode plates 22 arranged in parallel on a frame body 21, and application terminals 26 provided on the frame body 21 for applying a high voltage to the charged electrode plates 22, and the frame body 21 is detachably mounted opposite the outdoor heat exchanger 12 of the outdoor unit 10. As a result, by applying a high voltage to the charging electrode plate 22 via the application terminal 26, a corona discharge C is generated from the charging electrode plate 22 toward the fins 13 of the outdoor heat exchanger 12, and the dust particles 41 contained in the intake air can be negatively charged by the corona discharge C. Furthermore, because the air drawn into the outdoor unit 10 simply passes between the charging electrode plates 22, it is possible to prevent pressure loss due to clogging of the filter, as occurs in conventional cases where a filter is used.

[0022] In the electric dust collecting device 20 of this embodiment, a sawtooth-like uneven portion 23 is formed on the portion of the charged electrode plate 22 that faces the outdoor heat exchanger 12. This allows a corona discharge C to be efficiently generated from the tip of the uneven portion 23 of the charging electrode plate 22 toward the fins 13.

[0023] In addition, in the electric dust collecting device 20 of this embodiment, an adjuster 27 that regulates the distance between the charged electrode plate 22 and the outdoor heat exchanger 12 is provided on the frame 21 . This allows the distance between the charging electrode plate 22 and the outdoor heat exchanger 12 to be kept appropriate, so that corona discharge C can be efficiently generated from the charging electrode plate 22 to the fins 13 of the outdoor heat exchanger 12.

[0024] Furthermore, in the electric dust collecting device 20 of this embodiment, a packing 28 is provided between the frame 21 and the housing 11 of the outdoor unit 10 to tightly attach the frame 21 and the housing 11 together. As a result, by attaching the frame body 21 of the electric dust collecting device 20 to the outdoor unit 10 in close contact with the packing 28, it is possible to prevent a gap from being formed between the electric dust collecting device 20 and the outdoor unit 10. This makes it possible to prevent air from being drawn directly into the outdoor unit 10 without passing through the electric dust collecting device 20.

[0025] [Variations] Next, a modified example of the present disclosure will be described. FIG. 8 is a schematic configuration diagram showing a modified example of the present disclosure. In the first embodiment, an example has been described in which the electrostatic precipitating device is configured by arranging charged electrode plates at predetermined intervals. As shown in FIG. 8, in this modification, a ground plate 50 is arranged between each of the charged electrode plates 22. In this case, the charging electrode plates 22 and the earth plates 50 are arranged alternately.

[0026] In this modified example, when a voltage and a current are applied to the charging electrode plate 22, a corona discharge C can be generated between the charging electrode plate 22 and the fin 13, as in the first embodiment, and a corona discharge C can also be generated between the charging electrode plate 22 and the earth plate 50. Therefore, the dust particles 41 contained in the air passing through the charging electrode plates 22 can be efficiently negatively charged in the region between the charging electrode plates 22 .

[0027] (Other embodiments) As described above, the first embodiment has been described as an example of the technology disclosed in the present application. However, the technology in the present disclosure is not limited to this, and can be applied to embodiments in which modifications, substitutions, additions, omissions, etc. are made. Furthermore, it is also possible to combine the components described in the first embodiment above to create new embodiments.

[0028] (Addendum) The above description of the embodiments discloses the following techniques.

[0029] (Technology 1) An electrostatic precipitating device comprising: a plurality of charged electrode plates arranged in parallel on a frame body; and application terminals provided on the frame body for applying a high voltage to the charged electrode plates, the frame body being detachably attached opposite an outdoor heat exchanger of an outdoor unit. With this configuration, by applying a high voltage to the charging electrode plate via the application terminal, a corona discharge is generated from the charging electrode plate toward the fins of the outdoor heat exchanger, and the corona discharge negatively charges the dust particles contained in the intake air. Furthermore, because the air drawn into the outdoor unit simply passes between the charging electrode plates, it is possible to prevent pressure loss due to filter clogging, which is a problem that occurs when a filter is used as in the past.

[0030] (Technical Aspect 2) The electric dust collecting device according to Technical Aspect 1, wherein a sawtooth-shaped uneven portion is formed on a portion of the charged electrode plate facing the outdoor heat exchanger. With this configuration, corona discharge can be efficiently generated from the tip of the uneven portion of the charging electrode plate toward the fin.

[0031] (Technical Aspect 3) The electric dust collecting device according to Technical Aspect 1 or Technical Aspect 2, wherein the frame is provided with an adjuster that regulates the distance between the charged electrode plate and the outdoor heat exchanger. According to this configuration, the distance between the charging electrode plate and the outdoor heat exchanger can be maintained at an appropriate level, so that corona discharge can be efficiently generated from the charging electrode plate to the fins of the outdoor heat exchanger.

[0032] (Technology 4) The electric dust collecting device according to any one of Technology 1 to Technology 3, wherein a packing is provided between the frame body and the housing of the outdoor unit to tightly seal the frame body and the housing. According to this configuration, the packing tightly attaches the frame of the electrostatic precipitating device to the outdoor unit, thereby preventing a gap from forming between the electrostatic precipitating device and the outdoor unit, thereby preventing air from being drawn directly into the outdoor unit without passing through the electrostatic precipitating device.

[0033] (Technical 5) The electric dust collecting device according to any one of Technical 1 to Technical 4, wherein a grounding portion is provided between the charged electrode plates. According to this configuration, corona discharge can be safely generated by the charged electrode plate.

[0034] (Technical 6) An outdoor unit of an air conditioner, in which the electric dust collecting device according to any one of Technical 1 to Technical 5 is installed. With this configuration, by applying a high voltage to the charging electrode plate via the application terminal, a corona discharge is generated from the charging electrode plate toward the fins of the outdoor heat exchanger, and the corona discharge negatively charges the dust particles contained in the intake air. Furthermore, because the air drawn into the outdoor unit simply passes between the charging electrode plates, it is possible to prevent pressure loss due to filter clogging, which is a problem that occurs when a filter is used as in the past. [Industrial Applicability]

[0035] The present disclosure is suitably applicable to an electrostatic precipitator device and an outdoor unit of an air conditioner that can suppress pressure loss and efficiently remove dust particles contained in suction air. [Explanation of symbols]

[0036] 10 Outdoor unit 11. Housing 12 Outdoor heat exchanger 13 Finn 14 Intake port 20 Electrostatic Precipitation Device 21 Frame 22 Charged electrode plate 23 Uneven part 24 recess 25 Protrusion 26 Application terminal 27 Adjuster 28 Gasket 30 bands 40 negative ions 41 Dust particles 50 Earth plate C Corona discharge

Claims

1. a plurality of charged electrode plates arranged in parallel on a frame body; and an application terminal provided on the frame body for applying a high voltage to the charged electrode plates; The frame is detachably attached to face the outdoor heat exchanger of the outdoor unit. Electrostatic precipitator device.

2. a sawtooth-shaped concave-convex portion is formed on a portion of the charged electrode plate facing the outdoor heat exchanger; 2. The electrostatic precipitating device according to claim 1.

3. The frame is provided with an adjuster that regulates the distance between the charging electrode plate and the outdoor heat exchanger.

2. The electrostatic precipitating device according to claim 1.

4. A packing is provided between the frame body and the housing of the outdoor unit to tightly seal the frame body and the housing.

2. The electrostatic precipitating device according to claim 1.

5. A ground plate is provided between each of the charged electrode plates.

2. The electrostatic precipitating device according to claim 1.

6. An electric dust collecting device according to any one of claims 1 to 5 is installed. An outdoor unit for an air conditioning system.

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