JP5915419B2 - Air conditioner - Google Patents

Description

  The present invention relates to an air conditioner including an active species generating unit that generates active species by discharge.

  2. Description of the Related Art Conventionally, an air conditioner is known that includes an active species generator that generates active species such as ions and radicals by discharge for air purification (see, for example, Patent Document 1). The active species has an ability to decompose harmful components and odor components contained in the air.

  As an example of an air conditioner equipped with an active species generator, a recess that has a casing that houses a heat exchanger and a fan, and a front panel that covers the front surface of the casing, is formed at the longitudinal end of the front surface of the casing. In some cases, an active species generating device is arranged (see FIGS. 2 and 3 of the present embodiment).

  For example, as shown in FIG. 14, the active species generator 90 includes a rectangular parallelepiped casing 91 having an air inlet 91a and an outlet (not shown), a discharge needle and an electrode plate (illustrated) housed in the casing 91. And a terminal plate 92 connected to the electrode plate. The terminal board 92 protrudes out of the casing 91 from a through hole 91b formed in the casing 91. In a state where the active species generator 90 is attached to the casing 93, the terminal plate 92 is inserted into an insertion hole 93 a formed in the casing 93, and the tip thereof is connected to a contact portion 94 provided in the casing 93. . The contact portion 94 is disposed on the outer surface of the electrical component box 95, for example.

  Further, in the example shown in FIG. 14, when the air flow by the fan passes near the contact portion 94, dust or the like adheres to the periphery of the contact portion 94 and the dielectric strength is reduced. Between the fan and the fan, a wall portion 96 for blocking the air flow is provided.

JP 2006-234330 A

  When active species are generated, ammonium nitrate and ozone are generated as by-products. A part of the generated ammonium nitrate and ozone is discharged to the outside of the casing 91 through the through hole 91b of the terminal plate 92 provided in the casing 91, then passes through the insertion hole 93a of the casing 93, and contacts 90 Move to near. By providing the wall portion 96 between the contact portion 94 and the fan, the flow of air containing ozone decreases in the vicinity of the contact portion 94, but some ammonium nitrate or the like still accumulates in the vicinity of the contact portion 94. Since ammonium nitrate is highly water-absorbing and becomes a derivative when it contains moisture, there is a problem that ammonium nitrate accumulated in the vicinity of the contact portion 94 corrodes the contact portion 94 and wiring connected thereto. Ozone also has the property of deteriorating electronic components.

  Further, when the contact portion 94 is provided on the outer surface of the electrical component box 95, the ammonium nitrate accumulated near the contact portion 94 enters the electrical component box 95, and the electronic components in the electrical component box 95 are corroded. There is a case.

  Then, an object of this invention is to provide the air conditioner which can prevent that ammonium nitrate etc. which arise at the time of generation | occurrence | production of active species accumulate at a contact part, and can prevent corrosion.

  In order to solve the above-described problem, an air conditioner according to a first aspect of the present invention includes a fan, a heat exchanger, a drain pan disposed below the heat exchanger, and a casing containing a high-voltage power supply unit, and the casing. An active species generating unit having an active species generating / discharging unit that generates active species, and when the active species generating unit is attached to the casing, One contact portion is configured to be connected to a second contact portion of the high-voltage power supply unit, and a wall portion is disposed between the fan and the heat exchanger and the second contact portion, The wall portion has a notch at a position higher than the drain pan.

In this air conditioner, by providing the wall portion between the second contact portion and the fan, it is possible to prevent the dielectric strength from being lowered due to dust or the like adhering to the periphery of the second contact portion due to the air flow by the fan. By providing a notch in the wall portion, when the ammonium nitrate or ozone generated during the generation of the active species is discharged from the active species generating unit and moves to the vicinity of the second contact portion, the second contact portion of the wall portion The ammonium nitrate or the like on the side can be discharged into the space on the opposite side of the wall from the second contact portion by the notch. Accordingly, it is possible to prevent ammonium nitrate and the like from accumulating around the second contact portion, and thus it is possible to prevent the second contact portion and components such as wiring connected thereto from being corroded by ammonium nitrate or the like.
Moreover, since the notch is formed at a position higher than the drain pan, ammonium nitrate or the like that has moved to the space on the heat exchanger side of the wall through the notch can be stored in the drain pan. Therefore, ammonium nitrate and the like can be discharged from the air conditioner together with the condensed water stored in the drain pan.

  An air conditioner according to a second invention includes, in the first invention, an electrical component box housed in the casing, wherein the electrical component box has a box portion having an opening, and a lid portion that closes the opening. The second contact portion is disposed on the outer peripheral surface of the side wall of the box portion, and the opening is on the opposite side of the wall portion with respect to the second contact portion. .

  In this air conditioner, the box part of the electrical component box has an opening on the side opposite to the wall part with respect to the second contact part, so that it passes through the notch in a space on the side opposite to the second contact part. The moved ammonium nitrate or the like does not enter the electrical component box from the gap between the box part and the lid part. Therefore, corrosion of the electronic components in the electrical component box can be prevented.

  As described above, according to the present invention, the following effects can be obtained.

In the first invention, by providing a wall portion between the second contact portion and the fan, it is possible to prevent the dielectric strength from being lowered due to dust or the like adhering to the periphery of the second contact portion due to the air flow by the fan. By providing a notch in the wall portion, when the ammonium nitrate or ozone generated during the generation of the active species is discharged from the active species generating unit and moves to the vicinity of the second contact portion, the second contact portion of the wall portion The ammonium nitrate or the like on the side can be discharged into the space on the opposite side of the wall from the second contact portion by the notch. Accordingly, it is possible to prevent ammonium nitrate and the like from accumulating around the second contact portion, and thus it is possible to prevent the second contact portion and components such as wiring connected thereto from being corroded by ammonium nitrate or the like.
Moreover, since the notch is formed at a position higher than the drain pan, ammonium nitrate or the like that has moved to the space on the heat exchanger side of the wall through the notch can be stored in the drain pan. Therefore, ammonium nitrate and the like can be discharged from the air conditioner together with the condensed water stored in the drain pan.

  In the second invention, since the box portion of the electrical component box has an opening on the opposite side to the wall portion with respect to the second contact portion, the box portion passes through the notch and is in a space on the opposite side to the second contact portion. The moved ammonium nitrate or the like does not enter the electrical component box from the gap between the box part and the lid part. Therefore, corrosion of the electronic components in the electrical component box can be prevented.

It is a perspective view of the indoor unit of the air conditioner concerning the embodiment of the present invention. It is sectional drawing along the AA line shown in FIG. It is a perspective view of the indoor unit in a state where the front panel is opened. FIG. 4 is a partially enlarged perspective view when an active species generating unit is removed from the state of FIG. 3. It is a front view at the time of removing an active species generating unit from the state of FIG. It is sectional drawing of the indoor unit along the BB line shown in FIG. It is sectional drawing along CC line shown in FIG. It is a perspective view of the state which removed the casing and the filter unit. It is a partial expansion perspective view at the time of removing the cover part of an electrical component box from the state of FIG. It is a perspective view of an electrical component unit. It is a front view of the state which removed the casing and the filter unit. It is a disassembled perspective view of an active species generation unit. (A) is a top view of the housing of an active species generation unit, (b) is a sectional view which met a DD line shown in (a). It is sectional drawing of the conventional indoor unit provided with the active species generation unit.

Hereinafter, an air conditioner according to an embodiment of the present invention will be described.
The air conditioner of this embodiment is comprised with the indoor unit 1 shown in FIG. 1, and the outdoor unit which is not shown in figure, and performs indoor air conditioning. The indoor unit 1 has an elongated shape in one direction as a whole, and is installed on a wall surface in the room so that its longitudinal direction is horizontal. In the following description, the direction protruding from the wall to which the indoor unit 1 is attached is referred to as “front”, and the opposite direction is referred to as “rear”. Further, the left-right direction shown in FIG. 1 is simply referred to as “left-right direction”.

  As shown in FIGS. 1 and 2, the indoor unit 1 includes a substantially rectangular parallelepiped casing 2 that is open at the rear, a front panel 3 that covers the front surface of the casing 2, and an activity that is detachably attached to the front surface of the casing 2. A seed generation unit 9 and internal devices such as a fan 4, a heat exchanger 5, a drain pan 6, a filter unit 7 and an electrical component unit 8 (see FIG. 8) housed in the casing 2 are provided.

  A suction port 10 is formed on the upper wall of the casing 2, and an air outlet 11 is formed on the lower wall of the casing 2. During the air conditioning operation, indoor air is sucked into the casing 2 from the suction port 10 by driving the fan 4. The sucked air passes through the filter unit 7, the heat exchanger 5, and the fan 4 in order, and is blown out from the outlet 11.

  As shown in FIG. 3, an opening 12 is formed on the front surface of the casing 2. Further, as shown in FIG. 4, on the right side of the opening 12 on the front surface of the casing 2, a concave accommodating portion 13 for accommodating the active species generating unit 9 and a flow path extending from the accommodating portion 13 to the opening 12. A groove 14 is formed. The active species discharged from the active species generating unit 9 pass through the flow channel 14.

  As shown in FIG. 5, two insertion holes 13 a and 13 b are formed in the bottom portion of the accommodating portion 13 so as to be lined up and down. Terminal plates (first contact portions) 45 and 45 and projecting portions 37 and 38 (see FIG. 2) of the active species generating unit 9 are inserted into the insertion holes 13a and 13b. As shown in FIG. 6, an engagement groove 13 c that engages with a claw portion 30 c described later of the active species generating unit 9 is formed on the upper wall of the housing portion 13. A gap is formed between the lower end and right end of the front panel 3 and the casing 2, and the indoor air sucked from the gap is supplied to the active species generating unit 9. FIG. 6 is a cross-sectional view taken along line BB shown in FIGS.

  As shown in FIG. 5, the filter unit 7 is installed in the opening portion 12, and the upper end portion thereof is close to the suction port 10. As shown in FIG. 2, the fan 4 and the heat exchanger 5 are disposed behind the filter unit 7. The fan 4 is configured to suck air from the upper front and blow it out to the lower rear. The heat exchanger 5 is arranged so as to surround the front and upper sides of the fan 4. The drain pan 6 is for receiving condensed water generated by condensation of moisture in the air in the heat exchanger 5 during the cooling operation, and is disposed below the heat exchanger 5.

  As shown in FIG. 8, the electrical component unit 8 is arranged on the right side of the fan 4 (see FIG. 2) and the heat exchanger 5 and at a position behind the housing portion 13 (see FIG. 4). The electrical component unit 8 includes an electrical component box 20 that houses electronic components. As shown in FIGS. 8 and 9, the electrical component box 20 includes a box portion 21 whose right side is open and a lid portion 22 that closes the opening of the box portion 21. Further, as shown in FIG. 9, a high voltage power supply substrate 23 that supplies a high voltage to the active species generating unit 9 is accommodated in the lower portion of the box portion 21.

  As shown in FIGS. 9, 10, and 11, two contact portions (second contact portions) 24 and 25, a wall portion 26, and a short wall portion 27 are provided on the outer surface of the front wall of the box portion 21. Has been placed. The contact part 25 is disposed above the contact part 24. As shown in FIG. 7, the contact portion 25 is connected to the terminal plate 45 of the active species generating unit 9, and similarly, the contact portion 24 is connected to the terminal plate 44 of the active species generating unit 9 (see FIG. 6). ).

  As shown in FIGS. 10 and 11, the wall portion 26 is disposed on the left side of the two contact portions 24 and 25 and extends in the vertical direction (referred to as a vertical wall 26 a), and the upper and lower and right sides of the contact portion 24. It has a portion that surrounds and a portion that surrounds the top and bottom and the right side of the contact portion 25. The lower end of the vertical wall 26a of the wall portion 26 and the portion (lower wall 26b) arranged below the contact portion 24 and extending in the left-right direction are not connected, and the wall portion 26 is connected to the vertical wall 26a and the lower portion. A notch 26c is provided between the wall 26b. Of the wall portion 26, at least the vertical wall 26a and the lower wall 26b constitute the wall portion of the present invention.

  As shown in FIGS. 9 and 11, the short wall portion 27 has a shorter length in the front-rear direction than the wall portion 26 and is disposed on the left side of the vertical wall 26 a along the vertical direction. An upper end of the short wall portion 27 is connected to a portion of the wall portion 26 disposed below the contact portion 25, and a lower end of the short wall portion 27 is a portion of the wall portion 26 disposed above the contact portion 24. It is connected to the.

  The contact portions 24 and 25 are connected to the high-voltage power supply substrate 23 (see FIG. 9) by wiring 28 (see FIGS. 10 and 11) arranged outside the box portion 21. A part of the wiring 28 connected to the contact portion 25 is disposed between the vertical wall 26 a and the short wall portion 27. The contact portions 24 and 25, the high voltage power supply substrate 23, and the wiring 28 constitute a high voltage power supply unit of the present invention.

  As shown in FIG. 12 and FIG. 13, the active species generating unit 9 includes a substantially rectangular parallelepiped housing 30 opened at the front, a lid 31 covering the opening of the housing 30, and a discharge electrode plate 40 disposed in the housing 30. And the counter electrode plate 41, the discharge needle 42 held by the discharge electrode plate 40, and two terminal plates (first contact portions) 44, 45 respectively connected to the discharge electrode plate 40 and the counter electrode plate 41, And an auxiliary filter 32 disposed in the housing 30. In addition, the up-down, left-right, and front-back direction shown in FIGS. 12, 13 (a) and 13 (b) are directions when the active species generating unit 9 is attached to the housing portion 13 of the casing 2.

  The housing 30 and the lid 31 are made of a synthetic resin with high insulation. A claw portion 30 c is formed on the upper surface of the housing 30. When the active species generating unit 9 is attached to the accommodating portion 13 of the casing 2, the claw portion 30 c engages with an engaging groove 13 c (see FIG. 6) provided in the accommodating portion 13.

  The lid | cover 31 is arrange | positioned so that parts other than the lower end part of the front side opening of the housing 30 may be plugged up (refer FIG.4 and FIG.6). A portion of the front side opening of the housing 30 that is not closed by the lid 31 constitutes the inflow port 30a. The room air sucked from the gap between the edge of the front panel 3 and the casing 2 flows into the housing 30 through the inflow port 30a. In addition, an auxiliary filter 32 is disposed in the lower part of the housing 30 (see FIG. 6). The air flowing into the housing 30 from the inlet 30a passes through the auxiliary filter 32, and dust contained in the air is removed.

  An outlet 30b is formed on the left wall of the housing 30 to discharge the active species generated in the housing 30 to the outside. When the active species generating unit 9 is attached to the housing part 13 of the casing 2, the outlet 30 b faces the right end of the flow channel 14 of the casing 2. The active species discharged from the outlet 30 b passes through the flow channel groove 14 and is then sucked into the casing 2 from the opening 12.

  Four electrode plate support pillars 33 to 36 projecting forward are formed on the front surface of the bottom portion of the housing 30 so as to be substantially aligned in the vertical direction. The inner two electrode plate support columns 33 and 34 have the same length. The two outer electrode plate support columns 35 and 36 have the same length and are longer than the electrode plate support columns 33 and 34.

  The electrode plate support columns 33 and 35 are cylindrical, and screw grooves are formed on the inner peripheral surfaces thereof. The electrode plate support pillars 34 and 36 have a shape in which a cylinder and a square tube are combined. A screw groove is formed on the inner peripheral surface of the cylindrical portion, and a hole (square hole) inside the square cylindrical portion. 34 a and 36 a) penetrate the bottom of the housing 30. Further, on the rear surface of the bottom portion of the housing 30, projecting portions 37 and 38 projecting rearward from the edges of the square holes 34 a and 36 a are formed.

  The discharge electrode plate 40 is a rectangular metal plate, and is fixed to the front ends of the electrode plate support columns 33 and 34 with screws. The counter electrode plate 41 is a rectangular metal plate larger than the discharge electrode plate 40 and is fixed to the front ends of the electrode plate support columns 35 and 36 with screws. The central portion of the discharge electrode plate 40 protrudes toward the counter electrode plate 41, and the discharge needle 42 is held at the tip of the protruding portion.

  As shown in FIG. 7, the terminal plate 45 is inserted through the hole formed in the counter electrode plate 41 and the square hole 36 a of the electrode plate support column 36 and is disposed along the front-rear direction. The front end portion of the terminal plate 45 is fixed to the electrode plate support column 36 together with the counter electrode plate 41 with screws. The rear half of the terminal board 45 is disposed along the protruding portion 38. When the active species generating unit 9 is attached to the housing portion 13 of the casing 2, the projecting portion 38 and the terminal plate 45 are inserted into the insertion hole 13 b of the housing portion 13, and the terminal plate 45 comes into contact with the contact portion 25 to be electrically connected. Connected.

  Although illustration is omitted, the terminal plate 44 is inserted through the hole formed in the discharge electrode plate 40 and the square hole 34a of the electrode plate support column 34 and arranged along the front-rear direction (FIG. 12, FIG. 13). The front end portion of the terminal plate 44 is fixed to the electrode plate support pillar 34 together with the discharge electrode plate 40 with screws. The rear half of the terminal board 44 is disposed along the protruding portion 37. Further, when the active species generating unit 9 is attached to the housing portion 13 of the casing 2, the projecting portion 37 and the terminal plate 44 are inserted through the insertion hole 13 a of the housing portion 13, and the terminal plate 44 contacts the contact portion 24. Are electrically connected (see FIGS. 5 and 9, etc.).

  When a voltage is applied to the discharge needle 42 shown in FIG. 12, a discharge is generated from both ends of the discharge needle 42 toward the counter electrode plate 41. Then, active species (fast electrons, ions, hydroxyl radicals, excited oxygen molecules, etc.) are generated by generating low-temperature plasma by discharge. These active species decompose harmful components and odor components in the air composed of small organic molecules such as ammonia, aldehydes and nitrogen oxides. The discharge needle 42 and the counter electrode plate 41 constitute an active species generating discharge part of the present invention.

  When active species are generated, ammonium nitrate and ozone are generated as by-products. Part of the generated ammonium nitrate or the like is discharged out of the housing 30 through the square holes 34a and 36a shown in FIG. 6 and enters the casing 2 through the insertion holes 13a and 13b. Move to near. Ammonium nitrate or the like around the contact portion 24 moves to the space on the heat exchanger 5 side from the vertical wall 26a through the notch 26c of the wall portion 26 due to the negative pressure by the fan 4 (see FIG. 9). Further, ammonium nitrate or the like around the contact portion 25 passes between the vertical wall 26a and the lower wall 26b, and then moves to the space on the heat exchanger 5 side from the vertical wall 26a through the notch 26c.

  According to the air conditioner of the present embodiment, since the wall portion 26 is disposed between the contact portions 24 and 25 and the fan 4, the air flow by the fan 4 does not pass through the contact portions 24 and 25. 25, it is possible to prevent the dielectric strength from being lowered due to dust or the like adhering to the periphery. Then, the notch 26c is formed in the wall portion 26, so that ammonium nitrate or ozone generated when the active species are generated is discharged from the active species generating unit 9 and moved to the vicinity of the contact portions 24 and 25. Ammonium nitrate or the like on the contact portions 24, 25 side of the vertical wall 26a can be discharged into the space on the opposite side of the contact portions 24, 25 of the vertical wall 26a by the notch 26c. Therefore, since ammonium nitrate or the like can be prevented from accumulating around the contact portions 24 and 25, parts such as the contact portions 24 and 25 and the wiring 28 can be prevented from being corroded by ammonium nitrate or the like.

  Moreover, since the notch 26c is formed at a position higher than the drain pan 6, ammonium nitrate or the like that has moved to the space on the heat exchanger 5 side of the vertical wall 26a through the notch 26c can be stored in the drain pan 6. it can. Therefore, ammonium nitrate and the like can be discharged from the indoor unit 1 together with the condensed water stored in the drain pan 6.

  Moreover, since the box part 21 of the electrical component box 20 has an opening on the opposite side to the vertical wall 26a with respect to the contact parts 24 and 25, the side opposite to the contact parts 24 and 25 of the vertical wall 26a through the notch 26c. Thus, ammonium nitrate or the like that has moved into the space does not enter the electrical component box 20 through the gap between the box portion 21 and the lid portion 22. Therefore, corrosion of the electronic components in the electrical component box 20 can be prevented.

  Further, since a part of the wall portion 26 is provided on the side opposite to the vertical wall 26a with respect to the contact portions 24 and 25, ammonium nitrate or the like around the contact portions 24 and 25 moves to the opening side of the box portion 21. This can prevent the electronic components in the electrical component box 20 from corroding.

  As mentioned above, although embodiment of this invention was described based on drawing, it should be thought that a specific structure is not limited to these embodiment. The scope of the present invention is shown not by the above description of the embodiments but by the scope of claims for patent, and further includes meanings equivalent to the scope of claims for patent and all modifications within the scope.

  For example, in the above-described embodiment, the two contact portions (second contact portions) 24 and 25 are provided side by side in the vertical direction, but may be provided side by side in the left and right direction. In this case, the vertical wall of the wall portion is between the contact portion on the heat exchange side and the heat exchanger of the two contact portions (second contact portions) so that the air flow by the fan does not pass around the contact portion. Be placed.

  In the above-described embodiment, the active species generation unit 9 is disposed at the left and right ends of the indoor unit 1 and is arranged side by side with respect to the fan 4 and the heat exchanger 5. The arrangement position of the active species generating unit is not limited to this. The active species generating unit may be disposed in front of the heat exchanger. In this case, the two contact parts (second contact parts) connected to the two terminal plates (first contact parts) of the active species generating unit may be arranged in the vertical direction or in the horizontal direction. .

  In the above-described embodiment, the box portion 21 of the electrical component box 20 has an opening on the opposite side of the vertical wall 26a with respect to the contact portions (second contact portions) 24, 25. , 25 may have an opening on the vertical wall 26a side.

  Moreover, in the above-mentioned embodiment, although the wall part 26 and the contact part (2nd contact part) 24 and 25 are arrange | positioned at the outer surface of the electrical component box 20, they are arrange | positioned at members other than the electrical component box 20. Also good.

  By using the present invention, it is possible to prevent the ammonium nitrate and the like generated when active species are generated from accumulating at the contact portion, and to prevent corrosion.

DESCRIPTION OF SYMBOLS 1 Indoor unit 2 Casing 4 Fan 5 Heat exchanger 6 Drain pan 9 Active species generation unit 20 Electrical component box 21 Box part 22 Lid part 23 High voltage power supply board (high voltage power supply part)
24, 25 Contact part (second contact part, high voltage power supply part)
26 Wall 26a Vertical wall (wall)
26b Lower wall 26c Notch 28 Wiring (high voltage power supply part)
40 Discharge electrode plate 41 Counter electrode plate (active species generating discharge section)
42 Discharge needle (active species generation discharge part)
44, 45 Terminal board (first contact)

Claims (2)

A casing that houses a fan, a heat exchanger, a drain pan and a high-voltage power supply unit disposed below the heat exchanger;
An active species generating unit that can be attached to the casing and has an active species generating / discharging unit that generates active species,
When the active species generation unit is attached to the casing, the first contact portion of the active species generation unit is configured to be connected to the second contact portion of the high-voltage power supply unit,
A wall portion is disposed between the fan and the heat exchanger and the second contact portion,
The air conditioner, wherein the wall portion has a notch at a position higher than the drain pan. An electrical component box housed in the casing;
The electrical component box includes a box part having an opening and a lid part closing the opening,
The second contact portion is disposed on the outer peripheral surface of the side wall of the box portion,
The air conditioner according to claim 1, wherein the opening is on the opposite side of the wall portion with respect to the second contact portion.