Air conditioners

Abstract

To provide an air conditioner which minimizes the entry of dust, and which can keep the inside clean.SOLUTION: An air conditioner includes an indoor unit 50 which stores an indoor side heat exchanger 54 and an indoor side blower 56 inside an indoor unit body 52. The indoor unit body 52 includes: a suction port 55 opening so as to suck the air; and a blowout port 57 opening so as to blow out the air. The indoor side heat exchanger 54 is arranged between the suction port 55 and the indoor side blower 56. Between the suction port 55 and the indoor side heat exchanger 54, a mesh-like first prefilter 80 and a second prefilter 82, and a first air cleaning filter 90 and a second air cleaning filter 92 for cleaning the air which is sucked via the suction port 55 are arranged. The first air cleaning filter 90 and the second air cleaning filter 92 are provided corresponding to the entire region of the opening forming the suction port 55.SELECTED DRAWING: Figure 4

Description

[Technical field]

[0001] The present invention relates to an air conditioner. [Background technology]

[0002] 2. Description of the Related Art Conventionally, there has been an air conditioner that is provided with a dust collection filter that removes dust, and an air cleaning filter that removes finer dust particles than the dust collection filter, both facing the air intake port.

[0003] For example, the air conditioner in Patent Document 1 is equipped with an intake port that takes in indoor air, a heat exchanger that exchanges heat with the air sucked in through the intake port, a dust collecting filter that is arranged in front of the heat exchanger and collects dust in the air, an air purifying filter that is engaged with the dust collecting filter and collects finer dust particles than the dust collecting filter, a dew receiving section that receives condensation water flowing down the heat exchanger and directs it downward to prevent water leakage from the front side, and an extension section that extends from the dew receiving section to between the air purifying filter and the heat exchanger and faces the center of the air purifying filter. [Prior art documents] [Patent documents]

[0004] [Patent Document 1] JP 2008-286427 A Summary of the Invention [Problem to be solved by the invention]

[0005] However, in the air conditioner of Patent Document 1, the air purifying filter does not cover the entire air inlet, so there is a high possibility that dust that cannot be captured by the dust collecting filter will get inside the air conditioner.

[0006] SUMMARY OF THE PRESENT DISCLOSURE An object of the present invention is to provide an air conditioner capable of minimizing the intrusion of dust and keeping the interior clean. [Means for solving the problem]

[0007] (1) The air conditioner of the present invention has an indoor unit that houses a heat exchanger and a blower inside the indoor unit body, and the indoor unit body has an intake port that is open to allow air to be drawn in and an exhaust port that is open to allow air to be blown out, the heat exchanger is disposed between the intake port and the blower, and a mesh-shaped prefilter and an air purifying filter that purifies the air drawn in through the intake port are disposed between the intake port and the heat exchanger, and the air purifying filter is provided to correspond to the entire area of ​​the opening that forms the intake port.

[0008] The air conditioner of the present invention is configured such that a mesh-shaped pre-filter and an air purifying filter for purifying air are disposed between the air inlet and the heat exchanger. Furthermore, in the air conditioner of the present invention, the air purifying filter is provided in correspondence with the entire area of ​​the opening forming the air inlet. Therefore, in the air conditioner of the present invention, even if dust passes through the pre-filter, it is highly likely that the dust can be captured by the air purifying filter. Therefore, the air conditioner of the present invention can minimize the possibility of dust entering the inside of the indoor unit body through the air purifying filter, and can keep the inside clean.

[0009] Here, the inventors conducted intensive research and found that when adopting a structure in which the entire suction port is covered with a dust collecting filter as described above, it is desirable to take some measures to avoid an increase in pressure loss and noise, a decrease in air suction performance and blowing speed, etc.

[0010] (2) Based on this knowledge, the air conditioner of the present invention is preferably characterized in that a part or all of the air cleaning filter is made pleated with a plurality of folds, and is curved or bent so as to be away from the heat exchanger.

[0011] According to this configuration, the area of ​​the air cleaning filter that is involved in dust collection is increased, and the increase in pressure loss and noise can be suppressed. Also, according to the above-mentioned configuration, the air suction performance can be improved, and the decrease in the blowing speed can be suppressed.

[0012] Here, if a pleated air purifying filter having multiple folds is provided as a filter capable of collecting dust floating in the room and fine dust such as pollen, mite droppings, mold spores, fine sand, house dust, etc., it is assumed that the pressure loss when sucking in the air will be increased accordingly. On the other hand, even when a pleated air purifying filter is provided, the pressure loss is lower and the airflow rate is higher in the part (bent part) in which the air purifying filter is curved or bent than in other parts. Therefore, when a part or all of the air purifying filter is pleated with multiple folds and has a bent part, it is considered that the heat exchange efficiency can be increased by preferentially flowing the refrigerant through the part of the heat exchanger corresponding to the bent part, compared to a case where such a structure is not used.

[0013] (3) The air conditioner of the present invention provided based on such findings comprises an indoor unit housing a heat exchanger and a blower inside the indoor unit body, the indoor unit body having an intake port that is open to draw in air and an exhaust port that is open to blow out air, an air purifying filter that purifies the air sucked in through the intake port is disposed between the intake port and the heat exchanger, a part or all of the air purifying filter is pleated with a plurality of folds and has a bent portion that is curved or bent away from the heat exchanger, and a refrigerant flows preferentially to a part of the heat exchanger that corresponds to the bent portion of the air purifying filter.

[0014] According to this configuration, in the heat exchanger, the refrigerant flows preferentially through the portions of the pleated air cleaning filter that correspond to the bent portions, thereby improving the heat exchange efficiency.

[0015] (4) The above-mentioned air conditioner may be characterized in that the amount of refrigerant flowing through the portion of the heat exchanger corresponding to the bent shape portion of the air purification filter is greater than the amount of refrigerant flowing through other portions of the heat exchanger.

[0016] According to this configuration, it is possible to supply more refrigerant to the portion of the heat exchanger where high heat exchange efficiency is expected than to other portions, thereby further improving the heat exchange efficiency.

[0017] (5) The above-mentioned air conditioner may be characterized in that it has a refrigeration cycle that circulates refrigerant between the heat exchanger and the refrigeration cycle, and the refrigerant returning from the refrigeration cycle to the heat exchanger is supplied to a portion of the heat exchanger corresponding to the bent portion of the air purification filter, and is then supplied to another portion of the heat exchanger.

[0018] According to this configuration, the refrigerant that has absorbed or released heat in the refrigeration cycle and returned to the heat exchanger can be preferentially supplied to a portion of the heat exchanger where heat exchange efficiency is expected to be high, and thus the above-mentioned configuration is expected to further improve the heat exchange efficiency.

[0019] (6) The air conditioner of the present invention may be characterized in that either or both of a quasi-HEPA filter and a HEPA filter are used as the air cleaning filter.

[0020] In the air conditioner of the present invention, a HEPA filter (High Efficiency Particulate Air Filter) or a quasi-HEPA filter having dust removal performance equivalent thereto is used as an air purifying filter, and is provided to correspond to the entire area of ​​the opening forming the air inlet. Therefore, in the air conditioner of the present invention, for example, dust suspended in the room, and fine dust such as pollen, mite droppings, mold spores, fine sand dust, house dust, etc. can be captured with a high capture rate by the air purifying filter. Therefore, the air conditioner of the present invention can further reduce the possibility of dust entering the inside of the indoor unit body compared to the air purifying filter, and can maintain the inside clean.

[0021] (7) The air conditioner of the present invention may be characterized in that the air cleaning filter arranged on the top surface side of the indoor unit body is a flat plate-shaped filter.

[0022] According to this configuration, it is possible to arrange the air cleaning filter while preventing the indoor unit body from becoming large in height.

[0023] (8) The air conditioner of the present invention may be characterized in that the blower has a crossflow fan that rotates around a horizontal axis, the suction port of the indoor unit body has a first suction area provided upstream of the rotation direction of the crossflow fan and a second suction area provided upstream of the rotation direction of the crossflow fan than the first suction area, and the air purifying filter provided corresponding to the first suction area has a greater pressure loss associated with the passage of air than the air purifying filter provided corresponding to the second suction area.

[0024] According to this configuration, the pressure loss in the second suction area, which is further upstream of the first suction area, is smaller than the pressure loss in the first suction area, which is upstream of the crossflow fan. This allows the opening area of ​​the air purifying filter provided corresponding to the first suction area to be maximized within a limited dimensional range, while the opening area of ​​the air purifying filter provided corresponding to the second suction area is increased, thereby ensuring the required amount of intake air overall. This in turn allows for improved performance, such as air blowing efficiency and heat exchange efficiency.

[0025] (9) The air conditioner of the present invention may be characterized in that the heat exchanger is arranged so as to be curved or bent on the outer periphery of the blower and faces the air intake, and the air cleaning filter is curved or bent in accordance with the curvature or bending of the heat exchanger arrangement.

[0026] As described above, by curving or bending the air purifying filter according to the layout shape of the heat exchanger, the amount of air flowing into each part of the heat exchanger can be balanced. Therefore, with the above-mentioned configuration, it is expected to have effects such as improving the heat exchange efficiency.

[0027] (10) The air conditioner of the present invention may be characterized in that it has a drain pan provided inside the indoor unit body, and an evaporation filter capable of absorbing drain water accumulated in the drain pan, and a portion of the evaporation filter is positioned inside the indoor unit body in a position where it comes into contact with the airflow generated by operation of the blower.

[0028] With this configuration, the drain water accumulated in the drain pan is absorbed by the evaporation filter, and the drying of the evaporation filter is promoted by the airflow generated by the operation of the blower. Therefore, with the above-mentioned configuration, the drying inside the indoor unit body is promoted, the growth of mold and the like is suppressed, and the inside of the indoor unit body can be kept clean.

[0029] (11) In the air conditioner of the present invention, the indoor unit body may be characterized in that the height dimension is shorter than the depth dimension.

[0030] According to this configuration, it is possible to provide an air conditioner that is compact in height.

[0031] (12) The air conditioner of the present invention may be characterized in that it has a frame body that holds the air purifying filter and an engaging portion provided on the housing side that constitutes the indoor unit main body, and the air purifying filter can be attached and detached from the housing side by engaging and disengaging the frame body with the engaging portion.

[0032] According to this configuration, the air cleaning filter can be attached to and detached from the frame and the housing by engaging and disengaging the frame with respect to the engaged portion, thereby improving the convenience of attaching and detaching the air cleaning filter.

[0033] (13) The air conditioner of the present invention may be characterized in that it has an opening mounting member that is attached so as to cover an opening provided in the housing, and a filter unit including the air purification filter and the frame body can be detached from the engaged part by moving the frame body in a predetermined detachment direction or more than a predetermined detachment distance relative to the engaged part, and when the filter unit is attached to the housing side and the opening mounting member is attached so as to cover the opening, the gap formed between the filter unit and the opening mounting member is less than the detachment distance, and when the opening mounting member is removed from the opening, the filter unit can be moved in the detachment direction or more than the detachment distance.

[0034] In the above-mentioned air conditioner, when the opening attachment member provided on the opening of the housing is attached, the gap formed between the filter unit and the opening attachment member is less than the separation distance required to separate the filter unit from the engaged part on the housing side. Therefore, in the above-mentioned air conditioner, when the opening attachment member is attached to the opening, the filter unit can be prevented from unexpectedly separating from the engaged part. Furthermore, in the above-mentioned air conditioner, by removing the opening attachment member from the opening of the housing, the filter unit can be moved by more than the separation distance required to separate from the engaged part. Therefore, the above-mentioned air conditioner can normally prevent the filter unit from separating, and can remove the opening attachment member from the opening as necessary to remove the filter unit.

[0035] (14) In the air conditioner described above, the opening is preferably the air inlet, and the opening attachment member is preferably a mesh prefilter.

[0036] According to this configuration, it is possible to provide an air conditioner in which the pre-filter is utilized to prevent the filter unit from coming off, while the filter unit can also be removed by removing the pre-filter, for example for cleaning. Effect of the Invention

[0037] According to the present invention, it is possible to provide an air conditioner capable of minimizing the intrusion of dust and keeping the inside clean. [Brief description of the drawings]

[0038] [Figure 1] 1 is a conceptual diagram showing an air conditioner according to a first embodiment of the present invention. [Diagram 2] FIG. 2 is an explanatory diagram showing an example of a refrigeration cycle provided in the air conditioner of FIG. [Diagram 3] FIG. 2 is a block diagram focusing on a control unit provided in the air conditioner of FIG. [Figure 4]FIG. 2 is a schematic diagram illustrating an internal structure of an indoor unit main body according to the first embodiment of the present invention. [Diagram 5] FIG. 11 is a schematic diagram illustrating an internal structure of an indoor unit main body according to a first modified example. [Figure 6] FIG. 11 is a schematic diagram illustrating an internal structure of an indoor unit main body according to a second modified example. [Figure 7] FIG. 13 is a schematic diagram illustrating an internal structure of an indoor unit main body according to a third modified example. [Figure 8] FIG. 13 is a schematic diagram illustrating an internal structure of an indoor unit main body according to a fourth modified example. [Figure 9] 9 is a schematic diagram showing an example of the arrangement of a drain pan and a vaporization filter provided in the indoor unit main body of FIG. 8. FIG. [Figure 10] FIG. 11 is a perspective view showing the external appearance of an indoor unit provided in an air conditioner according to a second embodiment of the present invention. [Figure 11] FIG. 11 is a cross-sectional view showing the internal structure of the indoor unit in FIG. [Figure 12] 11(a) and 11(b) are perspective views showing a filter unit used in the indoor unit of FIG. [Figure 13] 13 is an exploded perspective view of the filter unit shown in FIG. 12. [Figure 14] FIG. 11 is a perspective view showing the indoor unit of FIG. 10 with a pre-filter removed and a front panel of the indoor unit body opened. [Figure 15] 11(a) is a cross-sectional view showing a first stage when removing the filter unit from the indoor unit of FIG. 10, and (b) is a cross-sectional view showing a second stage. [Figure 16] 11 is an explanatory diagram showing the configuration of an indoor heat exchanger 54 provided in the indoor unit of FIG. 10. FIG. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0039] First Embodiment An air conditioner 10 according to one embodiment of the present invention will be described in detail below with reference to the drawings. The air conditioner 10 is a so-called separate type air conditioner. The air conditioner 10 is broadly divided into an outdoor unit 20 and an indoor unit 50.

[0040] 2, the outdoor unit 20 houses components constituting a refrigeration cycle, such as a compressor 24, an outdoor heat exchanger 28, an expansion valve 30, and an outdoor blower 32, inside an outdoor unit body 22 made of resin, metal, etc. The outdoor unit 20 is connected to an indoor unit 50 via refrigerant pipes 34, 36.

[0041] The outdoor unit 20 has temperature detectors disposed in various portions and is capable of outputting detection signals to a control unit 60, which will be described in detail later. Specifically, in the outdoor unit 20, a temperature detector 28a is disposed in the outdoor heat exchanger 28. Also, a temperature detector 24a and a temperature detector 24b are disposed on the discharge side and the suction side of the compressor 24. Also, a temperature detector 30a is disposed near the expansion valve 30.

[0042] The indoor unit 50 is an indoor unit body 52 (air conditioner body) made of synthetic resin parts, and is provided with an indoor heat exchanger 54, an indoor blower 56, an air direction adjustment unit 58, a control unit 60, etc. The indoor unit body 52 has an intake port 55 on the top surface 52a side and the front surface 52b side, and an exhaust port 57 on the bottom surface 52c side. Although not shown, the intake port 55 may be provided near the front of the top surface 52a (above the second air cleaning filter 92 shown in the drawing) or near the front of the bottom surface 52c (below the second air cleaning filter 92 shown in the drawing). The shape and size of the indoor unit body 52 can be set as appropriate, but in this embodiment, the height dimension is shorter than the depth dimension.

[0043] The indoor heat exchanger 54 is capable of passing refrigerant between the outdoor unit 20 and the indoor heat exchanger 54 via the refrigerant pipes 34 and 36. The indoor heat exchanger 54 is arranged so as to be curved or bent on the outer periphery side of the indoor blower 56. For example, as in this embodiment, the indoor heat exchanger 54 can be arranged so as to be curved on the outer periphery side of the indoor blower 56 by combining a plurality of heat exchangers 54x, 54y, and 54z (three in the illustrated example) like a roof covering the indoor blower 56. The indoor heat exchanger 54 is arranged so as to face the air inlet 55. In addition, a temperature detector 54a is arranged in the indoor heat exchanger 54, and is capable of outputting a detection signal to a control unit 60, which will be described later in detail.

[0044] The indoor unit 50 can pass air through the indoor heat exchanger 54 by operating the indoor blower 56. This allows the indoor unit 50 to send the air that has exchanged heat with the refrigerant flowing inside the indoor heat exchanger 54 out into the living room from an air outlet provided in the indoor unit body 52. ​​The indoor blower 56 is equipped with a cross-flow fan 56a.

[0045] The indoor blower 56 has a cross-flow fan 56a that rotates around a horizontal axis. The indoor blower 56 is disposed inside the indoor unit body 52 so that the rotation axis of the cross-flow fan 56a extends in the width direction of the indoor unit body 52. ​​This allows the indoor blower 56 to suck air from the top surface 52a side or the front surface 52b side of the indoor unit body 52 and blow air out from the bottom surface side of the indoor unit body 52. ​​Specifically, as shown in FIG. 1, FIG. 4, etc., the cross-flow fan 56a rotates in a clockwise direction in a state where the top is the top surface 52a side of the indoor unit body 52 and the left side is the front surface 52b side of the indoor unit body 52. ​​The indoor blower 56 is disposed in a position biased toward the rear surface 52d side of the indoor unit body 52 (the right side in FIG. 1 and FIG. 4). Therefore, when the indoor blower 56 is operated, air can be sucked from both an area (first suction area 55x) where the suction port 55 is formed on the top surface 52a side of the indoor unit body 52 close to the indoor blower 56, and an area (second suction area 55y) where the suction port 55 is formed on the front surface 52b side which is upstream of the first suction area 55x in the rotation direction of the cross flow fan 56a. When the suction port 55 is provided near the front of the top surface 52a (above the second air cleaning filter 92 shown in the drawing) or near the front of the bottom surface 52c (below the second air cleaning filter 92 shown in the drawing), a part of the suction port 55 provided on the top surface 52a and the suction port 55 provided on the bottom surface 52c are included in the second suction area 55y.

[0046] The airflow direction adjustment unit 58 is disposed near the air outlet 57 on the bottom surface 52c side of the indoor unit body 52. ​​The airflow direction adjustment unit 58 adjusts the airflow direction from the air outlet 57 to the living room side in the vertical and horizontal directions.

[0047] The control unit 60 controls the operation of the air conditioner 10. The control unit 60 can receive set values ​​set by the user via a remote control 70 (described later) or the like. As shown in FIG. 3, the control unit 60 can receive output signals from the temperature detectors 24a, 24b, 28a, and 30a provided in the outdoor unit 20, the temperature detector 54a provided in the indoor unit 50, and the temperature detector 70a and humidity detector 70b provided in the remote control 70 (described later). The control unit 60 controls the operation of each part constituting the outdoor unit 20 and the indoor unit 50 based on the set values ​​input via the remote control 70 or the like and the signals received from the temperature detectors 24a, 24b, 28a, 30a, 54a, and 70a and the humidity detector 70b so that the temperature and humidity in the room, the operation of each part, and the like satisfy the user's requirements. Specifically, the control unit 60 issues operation commands to the compressor 24, the expansion valve 30, the outdoor blower 32, the indoor blower 56, the airflow direction adjustment unit 58, and the like.

[0048] More specifically, when the air conditioner 10 performs cooling operation, the high-temperature, high-pressure refrigerant discharged from the compressor 24 is introduced into the outdoor heat exchanger 28 and is allowed to exchange heat with the outdoor air. As a result, the refrigerant releases heat in the outdoor heat exchanger 28, condenses, and becomes liquid. The liquid refrigerant enters the expansion valve 30 from the outdoor heat exchanger 28 and is reduced in pressure. The reduced-pressure refrigerant is sent to the indoor heat exchanger 54, expands to a low temperature and low pressure, and lowers the surface temperature of the indoor heat exchanger 54. The indoor heat exchanger 54, whose surface temperature has been lowered, absorbs heat from the indoor air, thereby cooling the indoor air. After absorbing heat, the low-temperature gaseous refrigerant returns to the compressor 24. The airflow generated by the outdoor blower 32 promotes heat release from the outdoor heat exchanger 28, and the airflow generated by the indoor blower 56 promotes heat absorption by the indoor heat exchanger 54.

[0049] Also, when the air conditioner 10 performs heating operation, the refrigerant is controlled to flow in the opposite direction to that during cooling operation. That is, during heating operation, the high-temperature, high-pressure refrigerant discharged from the compressor 24 enters the indoor heat exchanger 54, where it exchanges heat with the air in the room. This causes the refrigerant to radiate heat to the air in the room, warming the air in the room. The refrigerant that condenses and becomes liquid as a result of the heat radiation enters the expansion valve 30 from the indoor heat exchanger 54 and is reduced in pressure. The refrigerant that has been reduced in pressure by the expansion valve 30 is sent to the outdoor heat exchanger 28, where it expands and becomes low-temperature and low-pressure. This reduces the surface temperature of the outdoor heat exchanger 28, and the refrigerant becomes low-temperature and gaseous due to the absorption of heat by the heat exchange with the outdoor air. The refrigerant that has been reduced in temperature and gaseous state by the outdoor heat exchanger 28 returns to the compressor 24. The airflow generated by the indoor blower 56 promotes heat dissipation from the indoor heat exchanger 54, and the airflow generated by the outdoor blower 32 promotes heat absorption by the outdoor heat exchanger 28.

[0050] The control unit 60 is provided with an operation unit 62, a notification unit 64, and the like. The operation unit 62 is for a user to operate. The operation unit 62 can be remotely controlled by a remote controller (remote control 70). The notification unit 64 is for notifying the operating state of the air conditioner 10, such as the power on / off state, the timer setting state, the set temperature, and other setting information set by the user. The notification unit 64 includes a sound notification unit 64a and a display notification unit 64b. The sound notification unit 64a is capable of outputting the above-mentioned various information by sound such as voice or notification sound. The display notification unit 64b is capable of outputting the above-mentioned various information by display. The display notification unit 64b is provided at a position that is easily visible to the user, such as the surface of the indoor unit main body 52 constituting the indoor unit 50.

[0051] In addition to the above-mentioned configuration, the indoor unit body 52 is provided with a first pre-filter 80, a second pre-filter 82, a first air cleaning filter 90, and a second air cleaning filter 92 for capturing dust in the air. These filters 80, 82, 90, and 92 are disposed between the indoor heat exchanger 54 and the suction port 55 forming the first suction area 55x and the second suction area 55y, respectively.

[0052] The first prefilter 80 and the first air purifying filter 90 are provided at a position corresponding to the suction port 55 forming the first suction region 55x. The second prefilter 82 and the second air purifying filter 92 are provided at a position corresponding to the suction port 55 forming the second suction region 55y. The first air purifying filter 90 and the second air purifying filter 92 are provided at a position inside the indoor unit body 52 (the indoor heat exchanger 54 side) with respect to the first prefilter 80 and the second prefilter 82, respectively. Therefore, the air sucked from the suction port 55 forming the first suction region 55x and the second suction region 55y first passes through the first prefilter 80 and the second prefilter 82, and then passes through the first air purifying filter 90 and the second air purifying filter 92 before reaching the indoor heat exchanger 54. In this way, in the suction port 55 forming the first suction area 55x and the second suction area 55y, filters are stacked to form a multiple structure (a double structure in this embodiment) consisting of a combination of a first prefilter 80 and a first air purifying filter 90, and a combination of a second prefilter 82 and a second air purifying filter 92.

[0053] The first pre-filter 80 and the second pre-filter 82 are, for example, formed by attaching a mesh-like member in which linear members made of resin or metal are woven to have a predetermined mesh size to a frame made of a resin molded body. The first pre-filter 80 and the second pre-filter 82 are capable of capturing relatively large dust particles contained in the air.

[0054] The first air purifying filter 90 and the second air purifying filter 92 may be made of, for example, a nonwoven fabric made of glass fiber. The first air purifying filter 90 and the second air purifying filter 92 are capable of capturing dust particles smaller than those of the first pre-filter 80 and the second pre-filter 82. Specifically, the first air purifying filter 90 and the second air purifying filter 92 are composed of either a HEPA filter (High Efficiency Particulate Air Filter) or a quasi-HEPA filter, or a combination of both. The HEPA filter is an air filter that has a particle collection rate of 99.97% or more for particles with a particle size of 0.3 μm at a rated air volume, and has an initial pressure loss of 245 Pa or less. The quasi-HEPA filter is an air filter that has a particle collection rate and other performance equivalent to that of a HEPA filter. The quasi-HEPA filter has a smaller pressure loss than the HEPA filter. Therefore, the first air cleaning filter 90 and the second air cleaning filter 92 can reduce the intrusion of fine dust particles contained in the air, such as pollen, mite droppings, mold spores, fine sand dust, house dust, etc., as well as the resulting adhesion of dirt to the inside of the indoor unit body 52 and the indoor heat exchanger 54, and the growth of mold.

[0055] Further, the first air cleaning filter 90 and the second air cleaning filter 92 are partially or entirely made of pleats (bellows-like) having a plurality of folds. In this embodiment, the second air cleaning filter 92 is made of pleats. This increases the air passage area (area related to dust collection) and the airflow rate of the second air cleaning filter 92, and also makes it possible to reduce pressure loss, etc.

[0056] The first air purifying filter 90 and the second air purifying filter 92 are arranged in different shapes. Specifically, the first air purifying filter 90 arranged in the first suction area 55x on the top surface 52a side of the indoor unit main body 52 is in a planar or flat shape. In contrast, the second air purifying filter 92 arranged in the second suction area 55y on the front surface 52b side of the indoor unit main body 52 is in a pleated shape as a whole, and is in a curved or bent shape (curved shape in this embodiment) so that the middle part is separated from the indoor heat exchanger 54. Because of this shape, the second air purifying filter 92 has a larger air passage area (area related to dust collection) and airflow rate than the first air purifying filter 90, and has a smaller pressure loss. In addition, the first air purifying filter 90 is thinner than the second air purifying filter 92. As a result, even if the indoor unit body 52 has vertical dimensional restrictions, not only the second air purification filter 92 but also the first air purification filter 90 can be disposed inside the indoor unit body 52, and the intake air entering from the top surface 52a side can be sufficiently purified.

[0057] As described above, the air conditioner 10 of this embodiment is configured to have the mesh-shaped first pre-filter 80 and second pre-filter 82, and the first air purifying filter 90 and second air purifying filter 92 for air purification disposed between the air inlet 55 and the indoor heat exchanger 54. Furthermore, in the air conditioner 10 of this embodiment, the first air purifying filter 90 and the second air purifying filter 92 are provided corresponding to the entire area of ​​the opening forming the air inlet 55. Therefore, in the air conditioner 10 of this embodiment, even if dust passes through the first pre-filter 80 and the second pre-filter 82, it is highly likely that the dust can be captured by the first air purifying filter 90 and the second air purifying filter 92. Therefore, the air conditioner 10 of this embodiment can minimize the possibility of dust entering the inside of the indoor unit main body 52 through the first air purifying filter 90 and the second air purifying filter 92, and can maintain the inside clean.

[0058] In the air conditioner 10 of this embodiment, a HEPA filter or a quasi-HEPA filter is used as the first air purifying filter 90 and the second air purifying filter 92. Therefore, in the air conditioner 10 of this embodiment, fine dust and the like that cannot be captured by the first pre-filter 80 and the second pre-filter 82 can be captured with a high capture rate by the first air purifying filter 90 and the second air purifying filter 92. Therefore, the air conditioner 10 can further reduce the possibility of dust entering the inside of the indoor unit main body 52 compared to the first air purifying filter 90 and the second air purifying filter 92. This can suppress the growth of mold and the generation of causes of unpleasant odors inside the indoor unit main body 52, and keep it clean.

[0059] In this embodiment, an example has been shown in which both the first air purifying filter 90 and the second air purifying filter 92 are HEPA filters or quasi-HEPA filters, but the present invention is not limited to this. For example, either one or both of the first air purifying filter 90 and the second air purifying filter 92 may be a medium-performance filter having a lower dust collection rate than a HEPA filter or quasi-HEPA filter and a higher collection rate than a pre-filter, or a ULPA filter having higher performance than a HEPA filter.

[0060] In addition, in the present embodiment, an example in which the first air purifying filter 90 and the second air purifying filter 92 have different thicknesses is shown, but the present invention is not limited to this. For example, in the example shown in FIG. 5 as a first modified example, the first air purifying filter 90 and the second air purifying filter 92 are pleated, and the thickness of the first air purifying filter 90 is set to the same thickness as the second air purifying filter 92. With this configuration, the amount of air sucked in from the suction port 55 forming the first suction area 55x on the top surface 52a is large, and the pressure loss is small. In the example shown in FIG. 5, the thickness of the first air purifying filter 90 is thicker than that of the example shown in FIG. 4, so it is preferable to increase the height of the indoor unit main body 52 by that amount, or adjust the arrangement of the indoor heat exchanger 54 and the indoor blower 56 in the vertical direction so as to fit within the vertical dimensional restrictions.

[0061] As described above, in the air conditioner 10 of the present embodiment, the first air cleaning filter 90 is pleated with multiple folds, so that the area of ​​the first air cleaning filter 90 for collecting dust is increased, thereby suppressing increases in pressure loss and noise, and improving air suction and blowing performance.

[0062] 4 and 5, the first air cleaning filter 90 arranged on the top surface 52a side of the indoor unit body 52 is flat or plate-shaped. With this configuration, it is possible to arrange the first air cleaning filter 90 while preventing the indoor unit body 52 from becoming large in the height direction.

[0063] In the air conditioner 10 shown in Figures 4 and 5, an example is shown in which the entire second air cleaning filter 92 is curved, but the present invention is not limited to this, and the second air cleaning filter 92 may be curved in part. In addition, in the example of Figures 4 and 5, the first air cleaning filter 90 is curved in a semicircular shape, but it may be curved in another shape or bent into, for example, a gate shape.

[0064] 4 and 5 show examples in which the first air cleaning filter 90 is planar or flat, but the present invention is not limited thereto, and the first air cleaning filter 90 may be curved or bent in part or in whole. For example, in the example shown in FIG. 6 as a second modified example, the first air cleaning filter 90 is curved in accordance with the shape of the indoor heat exchanger 54, similar to the second air cleaning filter 92. With this configuration, the area of ​​dust collection in the first air cleaning filter 90 is increased, similar to the second air cleaning filter 92, and it is possible to suppress an increase in pressure loss and noise, and improve the air suction performance and blowing performance.

[0065] As a third modified example, as shown in FIG. 7, instead of the first air purifying filter 90 and the second air purifying filter 92, an air purifying filter 94 may be provided that is an integrated combination of the first air purifying filter 90 and the second air purifying filter 92. The air purifying filter 94 is curved in an arch or arc shape according to the shape of the indoor heat exchanger 54. Similarly to the above-mentioned first air purifying filter 90 and the second air purifying filter 92, the air purifying filter 94 is disposed between the suction port 55 and the indoor heat exchanger 54, and is provided corresponding to the entire area (the first suction area 55x and the second suction area 55y) of the opening that constitutes the suction port 55. If the air purifying filter 94 is a pleated HEPA filter or quasi-HEPA filter similar to the first air purifying filter 90 and the second air purifying filter 92, the area for collecting dust is increased, and the increase in pressure loss and noise can be suppressed, and the air suction performance and blowing performance can be improved. Furthermore, in the case of using such a shape, the height of the indoor unit body 52 can be made slightly higher and the positioning of the indoor heat exchanger 54 and the indoor blower 56 in the vertical direction can be adjusted so as to fit within the vertical dimensional restrictions, thereby making the height of the indoor unit body 52 approximately the same as when the configuration illustrated in Figure 4 is adopted.

[0066] As described above, in the air conditioner 10 shown in FIG. 4, the indoor blower 56 has a cross-flow fan 56a, and the first air purifying filter 90 provided corresponding to the first suction area 55x has a larger pressure loss due to the passage of air than the second air purifying filter 92 provided corresponding to the second suction area 55y. Because of this configuration, the air conditioner 10 shown in FIG. 4 has a smaller pressure loss in the second suction area 55y further upstream of the first suction area 55x than the pressure loss in the first suction area 55x upstream of the cross-flow fan 56a. As a result, the opening area of ​​the first air purifying filter 90 provided corresponding to the first suction area 55x is maximized within a limited dimensional range, while a large opening area is secured in the second air purifying filter 92 provided corresponding to the second suction area 55y, thereby ensuring the required intake volume overall, and thus improving performance such as air blowing efficiency and heat exchange efficiency.

[0067] As described above, in the air conditioner 10 shown in Fig. 4 and Fig. 5, the indoor heat exchanger 54 is arranged so as to be curved or bent on the outer periphery side of the indoor blower 56 and is arranged so as to face the air inlet 55, and the first air purifying filter 90 is curved or bent according to the curved or bent arrangement of the indoor heat exchanger 54. In the air conditioner 10 shown in Fig. 6 and Fig. 7, not only the first air purifying filter 90 but also the second air purifying filter 92 is curved or bent according to the curved or bent arrangement of the indoor heat exchanger 54. With this configuration, the amount of air flowing into each part of the indoor heat exchanger 54 can be balanced. Therefore, with the above-mentioned configuration, effects such as improved heat exchange efficiency can be expected.

[0068] In addition, as shown in FIG. 8, the above-mentioned air conditioner 10 may be provided with an evaporation filter 110 capable of absorbing drain water accumulated in a drain pan 100 provided inside the indoor unit body 52. ​​Furthermore, when the evaporation filter 110 is provided, a part of the evaporation filter 110 may be disposed in a position inside the indoor unit body 52 where the evaporation filter 110 comes into contact with an airflow caused by the operation of the indoor blower 56. With this configuration, the drain water accumulated in the drain pan 100 is absorbed by the evaporation filter 110, and the drying of the evaporation filter 110 can be promoted by the airflow generated by the operation of the indoor blower 56. Therefore, with this configuration, the drying of the drain water accumulated in the drain pan 100 is promoted, the generation of mold and the like inside the indoor unit body 52 is suppressed, and the inside of the indoor unit body 52 can be kept clean.

[0069] In addition, when the drain pan 100 is provided with the evaporation filter 110 as shown in FIG. 8, the drain pan 100 may be arranged in the indoor unit body 52 so as to have a downward gradient in a predetermined direction (for example, a direction from one side to the other side in the width direction) as shown in FIG. 9 so that the drain water collects toward the drain outlet 102. In addition, when the configuration as shown in FIG. 9 is adopted, the evaporation filter 110 may be provided in a portion where the drain water collects near the drain outlet 102. With this configuration, the drain water can be absorbed by the evaporation filter 110 more efficiently, and the inside of the indoor unit body 52 can be kept clean. Although not shown, the evaporation filter 110 may be movable. That is, the evaporation filter 110 may be configured to retreat to a position where it does not absorb the drain water during cooling / heating operation, and to move to a position where the evaporation filter 110 can absorb the drain water during drying operation.

[0070] In the above-described air conditioner 10, it is preferable that the height dimension of the indoor unit body 52 is shorter than the depth dimension. With this configuration, the air conditioner 10 is compact in the height direction and can be installed in places where there are height restrictions.

[0071] Second Embodiment Hereinafter, the air conditioner 200 according to the second embodiment will be described in detail with reference to the drawings. Note that since the air conditioner 200 of the second embodiment has most of the same configuration as the air conditioner 10 of the first embodiment described above, the same reference numerals are used for the same components, and detailed description will be omitted or simplified.

[0072] 1 and 2, the air conditioner 200, like the above-described air conditioner 10, is a so-called separate type air conditioner, and is broadly divided into an outdoor unit 20 and an indoor unit 50. The air conditioner 200 is characterized in that the configuration of the outdoor unit 20 and most of the configuration of the indoor unit 50 are the same as those of the above-described air conditioner 10, but part of the configuration of the indoor unit 50 is different from that of the air conditioner 10.

[0073] Specifically, as shown in Fig. 11, the air conditioner 200 is an indoor unit 50 that houses an indoor heat exchanger 54 and an indoor blower 56 inside an indoor unit body 52 (housing). In this respect, the air conditioner 200 has the same configuration as the above-mentioned air conditioner 10 in terms of the indoor unit 50. In contrast, the air conditioner 200 is characterized by the configuration of the intake port 55 and the pre-filter 280 attached thereto, the mounting structure of the second air cleaning filter 92, and the configuration of the indoor heat exchanger 54, etc. These characteristic configurations will be described in detail below, appropriately in comparison with the configuration of the air conditioner 10 of the first embodiment.

[0074] [Configuration of suction port 55 and pre-filter 280] In the air conditioner 10 described above, the suction port 55 is formed in both the first suction area 55x on the top surface side of the indoor unit body 52 and the second suction area 55y on the front surface side. In contrast, as shown in Figures 10 and 11, in the air conditioner 200, a first suction area 255x corresponding to the first suction area 55x of the air conditioner 10 is provided on the top surface side of the indoor unit body 52, and a second suction area 255y corresponding to the second suction area 55y of the air conditioner 10 is also provided on the top surface side of the indoor unit body 52, which is different from the air conditioner 10. The first suction area 255x and the second suction area 255y are provided so as to be in a positional relationship corresponding to the first air cleaning filter 90 and the second air cleaning filter 92, respectively. In this embodiment, the first air purification filter 90 is provided on the rear side and the second air purification filter 92 is provided on the front side, and accordingly, the first suction area 255x is formed on the top surface of the indoor unit body 52 so as to be on the rear side and the second suction area 255y is formed on the front side.

[0075] Furthermore, in the air conditioner 10, a first pre-filter 80 and a second pre-filter 82 are provided so as to correspond to the first suction area 55x and the second suction area 55y, respectively. The air conditioner 200 may have a similar configuration, but in this embodiment, as shown in Fig. 10 etc., a plurality of integrated pre-filters 280 (opening attachment members) each having a mesh-like filter attached to a frame body large enough to be attached across both the first suction area 55x and the second suction area 55y (two in this embodiment) are arranged in parallel in the width direction of the indoor unit body 52.

[0076] [Second air cleaning filter 92 mounting structure] 11 and other figures, in the air conditioner 200, the first air cleaning filter 90, like the air conditioner 10 of the first embodiment described above, is flat or plate-like on the top surface 52a of the indoor unit body 52 and is disposed above the indoor heat exchanger 54. In contrast, the second air cleaning filter 92 is like the air conditioner 10 in that it is disposed in a curved shape such that its middle portion is away from the indoor heat exchanger 54, but is characterized in that it is attached to the indoor unit body 52 using a frame 292a. The attachment structure of the second air cleaning filter 92 will be described in more detail below.

[0077] 12 and 13, the second air cleaning filter 92 is detachable from the indoor unit body 52 in the state of a filter unit 292 set in a frame body 292a. The second air cleaning filter 92 is pleated with a plurality of folds, and is set in a curved bent state relative to the frame body 292a. The second air cleaning filter 92 is attachable to the inside of the indoor unit body 52 in the state of the filter unit 292.

[0078] Specifically, as shown in Fig. 11, inside the indoor unit body 52, an engaged portion 255 is provided on the front side of the indoor heat exchanger 54. Meanwhile, an engaging portion 292b that can engage with the engaged portion 255 is provided on a frame body 292a that constitutes the filter unit 292. The engaged portion 255 and the engaging portion 292b can support the filter unit 292 at a predetermined position in the engaged state, and can be engaged and disengaged as appropriate. The engaged portion 255 and the engaging portion 292b can be any appropriate one as long as they can perform such functions, but in this embodiment, the engaging portion 292b is substantially U-shaped with an open downward direction, and the engaged portion 255 is a protruding portion that fits into the open portion of the engaging portion 292b. Therefore, at the mounting position of filter unit 292 relative to indoor unit body 52, filter unit 292 can be fixed to indoor unit body 52 by sliding filter unit 292 downward and engaging engaging portion 292b with engaged portion 255.

[0079] Here, by engaging the engaging portion 292b with the engaged portion 255, in a state where the filter unit 292 is attached to the indoor unit body 52, the interval formed between the filter unit 292 and the pre-filter 280 (opening attachment member) is less than the length (detachment distance) required to slide upward to remove the filter unit 292. Therefore, in a state where the pre-filter 280 is attached to the first suction area 55x constituting the suction port 55, the filter unit 292 does not come off from the indoor unit body 52. ​​In contrast, as shown in FIG. 15(a), when the pre-filter 280 is removed and the opening area constituting the suction port 55 is opened, the filter unit 292 can be moved in the detachment direction (upward in this embodiment) by more than the detachment distance. Therefore, first, as shown in Fig. 15(a), the pre-filter 280 is removed and the front panel 52f of the indoor unit body 52 is opened, and then the filter unit 292 is slid upward by a predetermined amount (disengagement distance) as shown by the upward arrow in Fig. 15(b), thereby disengaging the engagement portion 292b from the engaged portion 255, thereby disengaging the filter unit 292 from the indoor unit body 52. ​​In this state, the filter unit 292 can be removed by pulling the filter unit 292 out to the front side of the indoor unit body 52 as shown by the arrow in Fig. 15(b). When attaching the filter unit 292, the filter unit 292 can be introduced into the indoor unit body 52 and engaged by performing the operations reverse to those described above.

[0080] [Configuration of indoor heat exchanger 54] The air conditioner 200, like the air conditioner 10 described above, is provided with an indoor heat exchanger 54 for cooling or heating the air that has passed through the first air cleaning filter 90 and the second air cleaning filter 92. The indoor heat exchanger 54 is a so-called plate fin type heat exchanger. As shown in FIG. 16, the indoor heat exchanger 54 has a duct formed by connecting a plurality of pipes 54p that are provided to penetrate the fins 54f that are arranged in a line in a large number at intervals in the width direction of the indoor unit body 52 (in the depth direction of the paper in FIG. 16). The indoor heat exchanger 54 flows a refrigerant (heat medium) through the duct formed by the pipes 54p, and causes the refrigerant to reciprocate in the direction in which the fins 54f are arranged, thereby exchanging heat between the air flowing between the fins 54f and the heat medium flowing inside the pipes 54p.

[0081] Here, in the air conditioner 200, the flow rate of the refrigerant flowing through the pipes 54p and the order in which the refrigerant flows are specified for each part of the indoor heat exchanger 54, taking into consideration the airflow resistance of the first air cleaning filter 90 and the second air cleaning filter 92. Specifically, the indoor heat exchanger 54 is broadly divided into four areas: a first heat exchange area 54A, a second heat exchange area 54B, a third heat exchange area 54C, and a fourth heat exchange area 54D.

[0082] The first heat exchange area 54A is located in a position corresponding to the second air purifying filter 92, and the portion facing the second air purifying filter 92 constitutes the main part of the area. The second heat exchange area 54B is located in a position corresponding to the second air purifying filter 92, and the portion facing the indoor blower 56 constitutes the main part of the area. That is, the second heat exchange area 54B is located in a position corresponding to the second air purifying filter 92, and the portion facing the indoor blower 56 constitutes the main part of the area. The third heat exchange area 54C is located in a position corresponding to the first air purifying filter 90, and the portion facing the first air purifying filter 90 constitutes the main part of the area. The fourth heat exchange area 54D is located in a position corresponding to the third heat exchange area 54C, and the portion facing the indoor blower 56 constitutes the main part of the area. That is, the fourth heat exchange area 54D is located in a position corresponding to the first air purifying filter 90, and the portion facing the indoor blower 56 constitutes the main part of the area.

[0083] The indoor heat exchanger 54 is connected between the first heat exchange area 54A via a distribution valve 54v so that the refrigerant supplied from the outdoor unit 20 side to the first heat exchange area 54A can be distributed to the second heat exchange area 54B and the third heat exchange area 54C. The distribution ratio of the refrigerant from the first heat exchange area 54A to the second heat exchange area 54B and the third heat exchange area 54C can be set appropriately, but is set to 1:1 in this embodiment. In addition, the indoor heat exchanger 54 is connected between both areas via a pipe 54p so that the refrigerant can be supplied from the third heat exchange area 54C to the fourth heat exchange area 54D. Therefore, the indoor heat exchanger 54 first supplies the refrigerant supplied from the outdoor unit 20 side to the pipe 54p provided in the first heat exchange area 54A, and exchanges heat with the air passing through the first heat exchange area 54A. The air that has passed through the first heat exchange area 54A can further exchange heat with the refrigerant distributed from the first heat exchange area 54A to the second heat exchange area 54B. Meanwhile, the air that passes through the third heat exchange area 54C exchanges heat with the refrigerant distributed from the first heat exchange area 54A. The air that has passed through the third heat exchange area 54C further exchanges heat with the refrigerant supplied from the third heat exchange area 54C to the fourth heat exchange area 54D. The refrigerant that has reached the most downstream of the pipes 54p provided in the second heat exchange area 54B and the fourth heat exchange area 54D is connected to the collecting valve 54w. The refrigerant that has collected in the collecting valve 54w is returned to the outdoor unit 20 side.

[0084] Since the indoor heat exchanger 54 has the flow path configuration as described above, the refrigerant can be preferentially flowed through the portion corresponding to the bent portion of the second air cleaning filter 92. Moreover, the amount of refrigerant flowing through the portion corresponding to the bent portion of the second air cleaning filter 92 is greater than the amount of refrigerant flowing through other portions of the indoor heat exchanger 54.

[0085] As described above, the air conditioner 200 according to the second embodiment is configured so that the refrigerant flows preferentially through the parts of the indoor heat exchanger 54 that correspond to the bent portions of the second air cleaning filter 92. Because of this configuration, in the air conditioner 200, the refrigerant flows preferentially through the parts of the indoor heat exchanger 54 that correspond to the bent portions of the pleated second air cleaning filter 92, thereby improving the heat exchange efficiency.

[0086] Furthermore, in the air conditioner 200, the amount of refrigerant flowing through the portion of the indoor heat exchanger 54 that corresponds to the bent portion of the second air cleaning filter 92 is greater than the amount of refrigerant flowing through other portions of the indoor heat exchanger 54. Therefore, the air conditioner 200 preferentially supplies more refrigerant to the first heat exchange area 54A, which is expected to have high heat exchange efficiency in the indoor heat exchanger 54, than to other portions, making it possible to further improve heat exchange efficiency.

[0087] Furthermore, in the air conditioner 200 of this embodiment, the second air cleaning filter 92 can be attached to and detached from the indoor unit body 52 by engaging and disengaging the frame 292a constituting the filter unit 292 with an engaged portion 255 provided on the indoor unit body 52. ​​Therefore, the air conditioner 200 can improve the convenience of the attachment and detachment work of the second air cleaning filter 92.

[0088] In the above-mentioned air conditioner 200, in a state where the pre-filter 280 provided in the suction port 55 is attached, the interval formed between the filter unit 292 and the pre-filter 280 is less than the separation distance required to separate the filter unit 292 from the engaged portion 255 on the housing side. Therefore, in a state where the pre-filter 280 is attached to the suction port 55, the air conditioner 200 can suppress the filter unit 292 from unexpectedly separating from the engaged portion 255. Furthermore, by removing the pre-filter 280 from the suction port 55 of the housing, the air conditioner 200 can move the filter unit 292 by a distance equal to or greater than the separation distance required to separate the filter unit 292 from the engaged portion 255. Therefore, the air conditioner 200 can normally suppress the separation of the filter unit 292, and can remove the filter unit 292 by removing the pre-filter 280 from the suction port 55 as necessary.

[0089] As shown in Fig. 11 etc., the air conditioner 200 according to the second embodiment has a structure in which the front area of ​​the indoor unit body 52 is a filter installation area where the second air cleaning filter 92 (filter unit 292) is arranged, and other components are concentrated in an area on the rear side (right side in the figure) of this area. Therefore, the air conditioner 200 can be shared by having the same configuration as an air conditioner of a type that does not have the second air cleaning filter 92, except for the filter installation area. Specifically, for example, the part other than the second air cleaning filter 92 can be unitized, and the unit can be shared between the air conditioner 200 and an air conditioner of a type that does not have the second air cleaning filter 92.

[0090] The present invention is not limited to the above-mentioned embodiments and modifications, and other embodiments may be possible within the scope of the claims. The components of the above-mentioned embodiments may be arbitrarily selected and combined. Any component of the embodiment may be arbitrarily combined with any component described in the Summary of the Invention or any component that embodies any component described in the Summary of the Invention. We intend to obtain rights to these as well through amendments to this application or divisional applications. [Industrial Applicability]

[0091] The present invention can be suitably used in air conditioners in general. [Explanation of symbols]

[0092] 10: Air conditioner 50: Indoor unit 52: Indoor unit body 52a: Top 52b:Front 54: Indoor heat exchanger 55: Intake port (opening) 55x: First suction area 55y: Second suction area 56: Indoor fan 56a: Crossflow fan 57:Air outlet 80: First prefilter 82: Second prefilter 90: First Air Purifier Filter 92: Second air purifying filter 100: Drain pan 110: Evaporative filter 200: Air conditioner 255: Engaged part 280: Prefilter 292: Filter unit 292a:Frame body

Claims

1. The indoor unit has a heat exchanger and a blower housed inside the indoor unit body. The indoor unit body is A suction port that is open so that air can be sucked in; An air outlet that is open so that air can be blown out; having The heat exchanger is disposed between the air inlet and the blower, Between the suction port and the heat exchanger, A mesh pre-filter; an air cleaning filter that cleans the air sucked in through the air inlet; is placed, The air cleaning filter is provided to correspond to the entire area of ​​the opening forming the air inlet, An air conditioner comprising a frame body that holds the air purifying filter and an engaged portion provided on the housing side that constitutes the indoor unit main body, wherein the air purifying filter can be attached and detached from the housing side by engaging and disengaging the frame body with the engaged portion.

2. 2. The air conditioner according to claim 1, wherein a part or all of the air cleaning filter is formed in a pleated shape having a plurality of folds, and is formed in a curved or bent shape so as to move away from the heat exchanger.

3. The indoor unit has a heat exchanger and a blower housed inside the indoor unit body. The indoor unit body is A suction port that is open so that air can be sucked in; An air outlet that is open so that air can be blown out; having an air cleaning filter that cleans the air drawn in through the air inlet is disposed between the air inlet and the heat exchanger; A part or the whole of the air cleaning filter is formed in a pleated shape having a plurality of folds, and has a bent shape portion that is curved or bent so as to move away from the heat exchanger, The indoor unit has a frame body for holding the air cleaning filter and an engaged part provided on a housing side constituting the indoor unit main body, and the air cleaning filter can be attached and detached to the housing side by engaging and disengaging the frame body with the engaged part, The air conditioner, wherein a refrigerant flows preferentially through a portion of the heat exchanger that corresponds to the bent portion of the air cleaning filter.

4. 4. The air conditioner according to claim 3, wherein an amount of refrigerant flowing through a portion of the heat exchanger corresponding to the bent portion of the air cleaning filter is greater than an amount of refrigerant flowing through other portions of the heat exchanger.

5. a refrigeration cycle that circulates a refrigerant between the heat exchanger and the 5. The air conditioner according to claim 3, wherein the refrigerant returning from the refrigeration cycle to the heat exchanger is supplied to a portion of the heat exchanger corresponding to the bent portion of the air cleaning filter, and is then supplied to another portion of the heat exchanger.

6. 6. The air conditioner according to claim 1, wherein either one or both of a quasi-HEPA filter and a HEPA filter are used as the air cleaning filter.

7. The air conditioner according to any one of claims 1 to 6, characterized in that, of the air cleaning filters, the one arranged on the top surface side of the indoor unit body is flat.

8. The blower has a crossflow fan that rotates around a horizontal axis, The suction port of the indoor unit body has a first suction area provided upstream in the rotation direction of the cross flow fan and a second suction area provided upstream of the first suction area in the rotation direction of the cross flow fan, The air conditioner according to any one of claims 1 to 7, characterized in that the air purification filter provided corresponding to the first suction area has a larger pressure loss associated with the passage of air than the air purification filter provided corresponding to the second suction area.

9. The heat exchanger is arranged so as to be curved or bent on the outer circumferential side of the blower and to face the suction port, The air cleaning filter is curved or bent in accordance with the curvature or bending of the heat exchanger. An air conditioner according to any one of claims 1 to 8.

10. A drain pan provided inside the indoor unit body; an evaporation filter capable of absorbing drain water accumulated in the drain pan; An air conditioner as described in any one of claims 1 to 9, characterized in that a portion of the evaporation filter is arranged inside the indoor unit body in a position where it comes into contact with the airflow generated by operation of the blower.

11. The air conditioner according to any one of claims 1 to 10, characterized in that the indoor unit body has a height dimension shorter than a depth dimension.

Images