JP2009270774A - Air conditioner - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide an air conditioner having a total heat exchange ventilation unit, capable of preventing intrusion of insects from an outside air introduction port, improving maintenance performance and preventing dew formation on a case surface due to a temperature difference between outside air flowing inside a dust collecting box and inside air outside the box. <P>SOLUTION: In the total heat exchange ventilation unit, the dust collection box is provided between the outside air introduction port on one air duct of a total heat exchanger for performing heat exchange between outside air and indoor air and the total heat exchanger. The dust collection box is formed to be a cylindrical body having the same cross sectional shape as that of the one air duct. One end face of the cylindrical body is opened on the outside air introduction port side and one side face is opened on the total heat exchanger side. An inner dust collection box is inserted to the dust collection box to form an air heat insulating layer in the inner faces of the inner dust collection box. An inner opening is provided on the inner dust collection box to oppose to a ventilation opening, and a mesh filter is provided on the ventilation opening or the inner opening. <P>COPYRIGHT: (C)2010,JPO&INPIT

Description

  The present invention relates to an air conditioner, and more particularly to an air conditioner provided with insect intrusion prevention means for preventing insects from entering from an outside air inlet of a built-in total heat exchanger.

  2. Description of the Related Art In recent years, air conditioners that perform air conditioning over all rooms of a house while being for general household use are becoming widespread.

  This type of air conditioner connects each room in a house with a duct, flows in outside air, cools or heats the air, supplies it to each room in the room, and cools or heats the room. The entire house is ventilated and air-conditioned by exhausting the air to the outside through the exhaust duct.

  This air conditioner is installed in a location facing the outdoor wall of a house, etc., to collect the thermal energy of the indoor unit, the outdoor unit, and the exhaust air from the room into the outdoor inflow air. A total heat exchanger is built in (see, for example, Patent Document 1).

However, the air conditioner described in Patent Document 1 has a problem that, when the outside air flows in, a small insect that is outside together with the inflowing air enters the room through the outside air inlet duct.
For this reason, the following measures have been taken as means for preventing the insects from entering.
(1) Provide a filter directly at the outside air inlet installed on the building outer wall.
(2) A filter is provided at a portion where the outside air suction duct is connected to the air conditioner.
(3) Insects are prevented from entering by a filter installed in the total heat exchanger.

However, these means have the following drawbacks.
With the method (1), in order for the user to perform maintenance, it is necessary to install the outside air inlet at a height that can be reached without using a stepladder or the like, so the construction of the outside air suction duct is complicated. In addition, there are restrictions on the location of the air conditioner, and it is necessary to go outside during maintenance.
In the means (2), since the air conditioner or the total heat exchanger needs to be removed in order to maintain the filter, maintenance by the user is difficult.
With the means of (3), since there is a possibility that insects may invade from the gaps in the filter part of the total heat exchanger and the gaps in the path to the filter, it is difficult to prevent the insects from entering.

In addition, an internal structure that partitions the outside air introduction path and the room air discharge path with a foam heat insulating material is configured, and an outside air inlet of a total heat exchange ventilation unit having a structure in which a total heat exchanger and a blower fan are arranged inside An air conditioner incorporating a resin dust collection box in which dust contained in outside air is collected by a filter so as not to be sent to the total heat exchanger and stored in a ventilation path between the total heat exchanger. Proposed. The proposed air conditioner has a structure in which an open / close lid is attached to the front side of the dust collection box and the open / close lid is opened so that the user can throw away the dust collected in the dust collection box. However, since the resin dust collection box is inserted into the air blowing path of the outer foam heat insulating material, a gap is likely to occur between the outer periphery of the dust collecting box and the inner surface of the air blowing path. If there is a gap in this part, the air sucked in by the blower fan not only draws in the outside air, but also sucks in room air from the gap in the total heat exchange ventilation unit, resulting in relatively cool air inside the dust collection box. Due to the relatively warm indoor air on the outside, dew condensation occurs on the surface of the dust collection box and water accumulates in the total heat exchange ventilation unit.
JP 2004-293777 A

  The present invention has been made in consideration of the above-described circumstances, prevents insects from entering from the outside air inlet, improves maintainability, and is based on the temperature difference between outside air flowing inside the dust collection box and outside inside air. An object of the present invention is to provide an air conditioner in which condensation does not occur on the surface of the dust collection box.

  In order to achieve the above-described object, an air conditioner according to the present invention is provided with an outside air inlet, an outside air outlet, an indoor air inlet, and an indoor air outlet on the outer surface of the unit casing. A total heat exchanger is housed in the center, and an outside air ventilation path communicating from the outside air introduction port to the outside air flow outlet through one ventilation path provided in the total heat exchanger, and the whole air from the indoor air introduction port. An indoor air ventilation path communicating with the indoor air outlet through the other ventilation path provided in the heat exchanger, and the ventilation air flowing through both the ventilation paths is heat-exchanged via the total heat exchanger. In the air conditioner provided with the total heat exchange ventilation unit, the total heat exchange ventilation unit has the outside air introduction port disposed on a back surface of the unit housing, and the outside air ventilation facing the outside air introduction port. The front of the unit housing of the road A front opening provided, a lid for opening and closing the front opening as appropriate, and sealing the front opening when closed, and an outside air ventilation path between the front opening and the outside air inlet of the unit housing A dust collection box which is installed in the inside and has a front opening and a front opening and an outside air introduction port at the front and rear, a side ventilation opening which communicates with the total heat exchanger on the side surface, and a dust collection box inside the dust collection box. It is housed so as to form an air insulation layer between the side surfaces of the dust collection box, has a cylindrical shape with a front opening and an outside air inlet at the front and rear, and communicates with the side ventilation openings of the dust collection box on the side surface And an inner dust collection box having a side ventilation opening.

  The air conditioner according to the present invention prevents insects from entering from the outside air inlet, improves maintainability, and causes condensation on the case surface due to the temperature difference between the outside air flowing inside the dust collection box and the outside air outside. An air conditioner that does not occur can be provided.

  An air conditioner according to an embodiment of the present invention will be described with reference to the drawings.

  FIG. 1 is a perspective view showing an air conditioner according to an embodiment of the present invention with a suction panel and an air filter removed, and FIG. 2 is a perspective view showing the back side of the air conditioner.

  As shown in FIGS. 1 and 2, an air conditioner 1 according to an embodiment of the present invention is configured to be installed integrally with a wall surface of a house or a house and guide conditioned air to each room in the room by a duct. . The casing 2 is formed of a thin metal plate, and has a height dimension of, for example, about 1800 mm, a width dimension of, for example, about 750 mm, and a depth dimension of, for example, about 440 mm, and is relatively thin in the front and rear.

  An outside air inlet 2a, an outside air flow inlet 2b, an indoor air inlet 2c, and an indoor air outlet 2d are provided on the outer surface of the casing 2 of the air conditioner. Inside the casing 2, the indoor fan 3 and the indoor heat exchange are provided. The unit 4 and the total heat exchange ventilation unit 5 are accommodated.

  An outside air intake duct 6 is communicated with the outside air introduction port 2a, an indoor air discharge duct 7 is communicated with the outside air flow inlet 2b, and an air conditioning air outlet duct 8 having one end opened indoors is provided at the indoor air outlet 2d. Communicated.

  The indoor blower 3 is arranged at the top of the housing 2 and is configured to send conditioned air to an indoor air outlet 2d that opens on the top surface of the housing 2.

  The indoor heat exchanger 4 is disposed on the lower side of the indoor blower 3 and at a substantially central portion of the housing 2. The indoor heat exchanger 4 is formed so that the width is approximately the same as the width of the housing 2 and the height direction is inclined at a certain angle in the front-rear direction. A drain pan 9 for receiving drain water generated in the indoor heat exchanger 4 is provided at the lower end of the indoor heat exchanger 4.

  Therefore, the heat exchange air guided into the housing 2 always flows through the indoor heat exchanger 4 to exchange heat.

  Further, the total heat exchange ventilation unit 5 is disposed at the lowermost part of the casing 2 of the air conditioner.

  As shown in FIGS. 3 to 6, the total heat exchange ventilation unit 5 is formed in a horizontally long shape having the same width as the width of the casing 2 of the air conditioner. A front opening 5e that opens the front surface of the inlet 5a and the dust collection box 10 is provided, an outdoor air inlet 5b and an indoor air outlet 5c are provided on the back, and an outer air outlet 5d is provided on the upper surface of the unit housing. Is provided. The inside of the housing 2 constitutes an internal structure that partitions the path of the outdoor air ventilation path 12 through which the outside air flowing in by the foam heat insulating material flows and the indoor air ventilation path 13 through which the discharged indoor air flows.

  The dust collection box 10 is made of, for example, a resin molded product or a stainless material. It is installed in the entrance-side passage of the total heat exchanger 14 of the outside air ventilation path 12 formed of foam heat insulating material, and the cross-sectional shape seen from the front is substantially the same as the side shape of the outside air ventilation path 12 from the outside air inlet 5b. A bottomless cylindrical dust collection box side surface portion 10a having a substantially fan-shaped cross-sectional outer shape as viewed from the front side is formed, and a dust collection box outside air introduction port 10b opened to the rear end side is provided as a unit casing 51. The dust collection box front opening 10c that opens to the outside air inlet 5b and opens to the front end side is exposed to the front opening 5e of the unit housing 51 and is normally closed by the lid 101.

  Moreover, when this dust collection box 10 is installed in the outside air ventilation path 12 formed of the foam heat insulating material, total heat exchange is performed in a gap generated between the inner side surface of the outside air ventilation path 12 and the outer side surface of the dust collection box 10. In order to prevent room air from entering through the gap of the unit housing 51 of the ventilation unit 5, a cushioning heat insulating material M is interposed between the inside surface of the outside air inflow ventilation path and the outside surface of the dust collection box 10. In a sealed state. With this heat insulating material M, the gap generated on the joint surface is filled, and the outside surface of the dust collection box 10 is dewed due to the temperature difference from the outside air flowing inside the dust collection box 10 when the room air enters from the gap. It can be prevented beforehand.

  The lid 101 includes a frame portion 101a having an outer peripheral shape substantially the same as the cross-sectional outer shape of the dust collection box 10, and a transparent window portion 101b formed inside the frame portion 101a, and is provided around the frame portion 101a. It is attached to the dust collection box 10 so as to be freely opened and closed by a stopping means (not shown).

  As shown in FIG. 7, the dust collection box 10 has a dust collection box side ventilation opening 10 d formed on the surface of the dust collection box side surface 10 a facing the total heat exchanger 14.

  Further, as shown in FIGS. 7 and 8, an inner dust collection box 11 is inserted inside the dust collection box 10 so that an air heat insulation layer A is formed between the inner surface of the dust collection box 10 and the inner dust collection box 10. The air insulation layer A is airtight enough to form an air layer substantially free of airflow between the dust collection box 10 and the inner dust collection box 11 with the lid 101 closed. That's fine.

  The inner dust collection box 11 is made of, for example, a resin molded product or a stainless material, like the dust collection box 10 described above. A bottomless cylindrical inner dust collection box side surface portion 11a having a substantially similar shape smaller than that of the dust collection box 10 and having an opening in front and rear where the cross-sectional shape viewed from the front of the dust collection box 10 forms a substantially fan-shaped opening shape. And has an inner dust collection box outside air inlet 11b that opens to the rear end side, and an inner dust collection box front opening 11c that opens to the front end side, and has a length equivalent to or slightly shorter than the dust collection box 10. Further, the inner dust collection box 11 is provided with an inner dust collection box side ventilation opening 11d so as to communicate with the dust collection box side ventilation opening 10d, and a mesh filter 111 is provided on the inner dust collection box side ventilation opening 11d. The mesh filter 111 has a mesh size that allows air to pass but prevents passage of small insects.

  The mesh filter 111 may be provided only in the inner dust collection box side vent opening 11d and may also be provided in the dust collection box side vent opening 10d of the dust collection box 10.

  Therefore, in the total heat exchange ventilation unit 5, the outside air flowing in from the outside air introduction port 5b of the unit housing 51 flows through the inside dust collection box 11, bends at right angles, and mesh filters 111 of the inside dust collection box side ventilation opening 11d, It flows out to one ventilation path side of the total heat exchanger 14 through the dust collection box side vent opening 10d.

  The inner dust collection box front opening 11 c is closed by the lid 101 together with the front opening 5 e of the unit housing 51.

  As shown in FIG. 2, the outside air introduction port 5 b of the unit housing 51 is connected to the outside air introduction port 2 a of the housing 2 and flows outside air into the total heat exchange ventilation unit 5 via the outside air suction duct 6. The indoor air outlet 5c of the unit casing 51 is connected to the outdoor air inlet 2b of the casing 2, and the outside air and heat introduced from the outside air suction duct 6 in the total heat exchange ventilation unit 5 through the indoor air discharge duct 7. The exchanged air is discharged outside the room.

  Again, as shown in FIG. 6, a total heat exchanger 14 formed by laminating and stacking heat exchanger elements is disposed at a substantially central portion of the total heat exchange ventilation unit 5, and the total heat exchanger 14 is viewed in plan view. It has a square shape, and the first and second air inflow surfaces 14a and 14b, the first air outflow surface 14c, and the second air outflow surface 14d of the total heat exchanger 14 are in the depth direction of the total heat exchange ventilation unit 5. They are aligned and tilted 45 °.

  An outside air introduction blower 15 is provided on one side of the total heat exchange ventilation unit 5, and an indoor air discharge blower 16 is provided on the other side.

  Furthermore, as shown in FIG. 7, the outdoor air cleaning filter 17 is detachably incorporated in the total heat exchange ventilation unit 5 in the vicinity of the dust collection box 10 through the front opening 5 e of the unit housing 51.

  The outside air cleaning filter 17 is provided with a protrusion protruding from a flange (not shown), and the outside air cleaning filter 17 inserted from the front opening 5e side of the unit housing 51 is fixed in a state where the peripheral frame is sealed. Thereby, the external air which flows through the external air ventilation path 12 can be reliably removed.

  The total heat exchange ventilation unit 5 including the dust collection box 10 and the total heat exchanger 14 in which the inner dust collection box 11 is loosely fitted as described above, and the air conditioner 1 incorporating the total heat exchange ventilation unit 5 are as follows. In this manner, heat exchange and air conditioning are performed.

  As shown in FIGS. 1, 2, and 6, the outside air flowing in through the outside air suction duct 6 and the outside air introduction port 2 a of the housing 2 by the rotation of the outside air introduction blower 15 is converted into the total heat exchange ventilation unit 5. To the outside air ventilation path 12. That is, the outside air that flows in from the outside air introduction port 5 b of the unit housing 51 flows into the inside dust collection box 11 that is loosely fitted in the dust collection box 10 installed in the outside air ventilation path 12 and is removed by the mesh filter 111. After the insects are removed and fine dust is removed by the outside air cleaning filter 17, the dust is sent to the total heat exchanger 14. The first heat inflow surface 14a formed in the total heat exchanger 14 passes through one air passage and passes through the other air passage from the second air inflow surface 14b to exchange heat with exhaust indoor air. 1 is sent from the air outflow surface 14 c to the external airflow outlet 5 d and blown into the housing 2. This outside air is mixed with a part of the indoor air sucked into the housing 2 through the air filter 18 from the left and right sides of the suction port front panel 2e of the housing 2 of the air conditioner 1, and the indoor heat exchanger 4 is cooled or heated, and blown into each room from the indoor air outlet 2d through the conditioned air blowing duct 8 by the operation of the indoor blower 3, and air conditioning in each room is performed.

  On the other hand, the room air is sucked into the housing 2 through the air filter 18 from the left and right sides of the suction port front panel 2e of the housing 2 of the air conditioner 1 by the rotation of the blower 16 for discharging the indoor air. Part of the air is sent to the indoor air ventilation path 13 from the indoor air introduction port 5 a formed on the front surface of the total heat exchange ventilation unit 5. That is, the indoor air sucked from the indoor air introduction port 5a flows into the other air passage from the second air inflow surface 14b formed in the total heat exchanger 14, and from the first air inflow surface 14a to one of the air passages. Heat is exchanged with the outside air passing through the ventilation path, and the air is sent from the indoor air outlet 5c of the unit housing 51 to the indoor air discharge duct 7 via the external airflow inlet 2b of the housing 2 and discharged to the outside.

  In such an outside air inflow process, relatively low temperature outside air flows in the inner dust collection box 11, and an air heat insulation layer A is provided between the dust collection box 10 and the inner dust collection box 11, and this air insulation is provided. Due to the heat insulating action of the layer A, the dust collection box 10 is not cooled, and even if the air in the total heat exchange ventilation unit 5 contacts the indoor dust collection box 10, no condensation occurs on the surface thereof. Therefore, the problem that water accumulates in the total heat exchange ventilation unit 5 does not occur at all.

  In addition, when insects are contained in the inflowing outside air during the outside air inflow process, the insects are moved and moved in the inner dust collection box 11, but the total heat exchanger of the total heat exchange ventilation unit 5 is moved by the mesh filter 111. Intrusion to the 14 side is prevented, and the front side of the dust collection box 10 is closed by the lid 101, so that it is temporarily held in the inner dust collection box 11.

  When the air conditioner 1 is operated for a long time, maintenance of the dust collection box 10 and the outside air cleaning filter 17 is required. In this maintenance, the suction port front panel 2e provided on the front surface of the housing 2 and the air filter 18 disposed behind the suction port front panel 2e are removed, and the total heat exchange ventilation unit 5 is exposed.

  The outside air cleaning filter 17 is removed, dust is removed, and the filter is installed again. On the other hand, the inner dust collection box 11 can confirm the presence or absence of insect dead bodies and the accumulation of dust from the transparent window portion 101b. 101 is opened, the inner dust collection box 11 is removed from the total heat exchange ventilation unit 5, the insect carcasses and garbage are discarded, the inner dust collection box 11 is incorporated into the total heat exchange ventilation unit 5, and the lid 101 is closed. .

  Since the inner dust collection box 11 is freely attached to and detached from the total heat exchange ventilation unit 5, maintenance from the indoor side becomes easy.

  Also, since insects contained in the outside air are captured and accommodated in the inner dust collection box 11, when the inner dust collection box 11 is removed, insect dead bodies fall into the outside air ventilation path 12, or insects are scattered. Can be prevented.

  In addition, when the dust collection box is installed in the outside air ventilation path 12 in which the internal structure is formed by the foam heat insulating material, since the cushioning heat insulating material M is interposed in the gap of the joint surface, the clearance of the total heat exchange ventilation unit Can prevent the indoor air from entering the outside of the dust collection box 10 from entering the inside, and can prevent condensation on the side surface 10 of the dust collection box due to the temperature difference between the indoor air and the outside air at different temperatures. .

  According to the air conditioner of the present embodiment, insects can be prevented from entering from the outside air inlet, improving maintainability, and the surface of the dust collection box due to the temperature difference between the outside air flowing inside the dust collection box and the outside air outside. An air conditioner that does not cause condensation is realized.

The perspective view which removes and shows the suction panel and air filter of the air conditioner which concern on one Embodiment of this invention. The perspective view which shows the back side of the air conditioner which concerns on one Embodiment of this invention. The left perspective view of the total heat exchange ventilation unit used for the air conditioner which concerns on one Embodiment of this invention. The right perspective view of the total heat exchange ventilation unit used for the air conditioner which concerns on one Embodiment of this invention. The rear view of the total heat exchange ventilation unit used for the air conditioner which concerns on one Embodiment of this invention. The longitudinal section of the total heat exchange ventilation unit used for the air harmony machine concerning one embodiment of the present invention. The enlarged view near the dust collection box used for the air conditioner concerning one embodiment of the present invention. The perspective view which shows the taking-out state of the inner side dust collection box integrated in the air conditioner which concerns on one Embodiment of this invention. The enlarged view near the dust collection box used for the air conditioner concerning one embodiment of the present invention.

Explanation of symbols

  DESCRIPTION OF SYMBOLS 1 ... Air conditioner, 2 ... Housing, 2a ... Outside air inlet, 2b ... Outside air flow inlet, 2c ... Indoor air inlet, 2d ... Indoor air outlet, 2e ... Suction port front panel, 3 ... Indoor fan, 4 ... indoor heat exchanger, 5 ... total heat exchange ventilation unit, 5a ... indoor air inlet, 5b ... outside air inlet, 5c ... indoor air outlet, 5d ... outside air outlet, 5e ... front opening, 6 ... outside air suction Duct, 7 ... Indoor air discharge duct, 8 ... Air-conditioning air outlet duct, 9 ... Drain tray, 10 ... Dust collection box, 10a ... Dust collection box side surface, 10b ... Dust collection box outside air inlet, 10c ... Front of dust collection box Opening portion, 10d ... Ventilation opening on the side of the dust collection box, 101 ... Cover, 101a ... Frame portion, 101b ... Transparent window portion, 11 ... Inner dust collection box, 11a ... Inner dust collection box side portion, 11b ... Inner dust collection Box outside air inlet, 11c Inner dust collection box front opening, 11d ... Inner dust collection box side ventilation opening, 111 ... Mesh filter, 12 ... Outside air ventilation path, 13 ... Indoor air ventilation path, 14 ... Total heat exchanger, 14a ... First air inflow Surface 14b second air inflow surface 14c first air outflow surface 14d second air outflow surface 15 air blower for introducing outside air 16 air blower for discharging indoor air 17 air freshness filter 18 ... air filter, A ... air heat insulation layer M ... heat insulating material with cushioning properties.

Claims (4)

An outside air inlet, an outside air outlet, an indoor air inlet, and an indoor air outlet are provided on the outer surface of the unit casing, and a total heat exchanger is accommodated in a substantially central portion in the unit casing. The indoor air outlet is connected to the outside air outlet through one ventilation path provided in the total heat exchanger, and the other ventilation path provided in the total heat exchanger from the indoor air introduction port. An air conditioner including a total heat exchange ventilation unit that forms an indoor air ventilation path that communicates with the ventilation air and that exchanges heat through the total heat exchanger.
The total heat exchanging ventilation unit includes the front opening provided in the front of the unit casing of the outside air ventilation path, the front opening being disposed on the back of the unit casing, and facing the outside air inlet. A lid that opens and closes the opening appropriately and seals the front opening when closed,
The unit housing is installed in an outside air ventilation path between the front opening and the outside air introduction port, and has a cylindrical shape having a front opening and an outside air introduction port in the front and rear, and the total heat exchanger on a side surface portion. A dust collection box having a side ventilation opening communicating with the
The dust collection box is housed inside the dust collection box so as to form an air heat insulation layer between the side surfaces of the dust collection box, and has a cylindrical shape with a front opening and an outside air inlet at the front and rear. An air conditioner comprising: an inner dust collection box having a side ventilation opening communicating with the side ventilation opening.   The air conditioner according to claim 1, wherein a mesh filter is formed in at least one of the ventilation opening on the side surface of the dust collection box or the ventilation opening on the side surface of the inner dust collection box.   The air conditioning according to any one of claims 1 to 2, wherein a heat insulating material having a cushioning property is interposed between an inner side surface of the outside air inflow ventilation path and an outer side surface of the dust collection box. Machine.   The air conditioner according to any one of claims 1 to 3, wherein the inner dust collection box is detachable from a front opening of the total heat exchange ventilation unit.

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