JP5831505B2 - Air conditioner - Google Patents

Description

  The present invention relates to an air conditioner, and more particularly to an air conditioner that takes in indoor air and removes and decomposes suspended matters (odor components, dust, bacteria, viruses, etc.) in the air.

  An air conditioner described in Patent Document 1 (Patent No. 5051316) harmonizes air taken in from a room through an air cleaning filter, and blows out a part of the conditioned air (conditioned air) from a blowout port. Before being activated, it is taken into another space to supply active species, and the conditioned air supplied with the active species is returned to the upstream side of the air purifying filter. This series of operations removes and disassembles suspended matter and blows out clean air.

  The intake port for taking in a part of the conditioned air is usually provided on the wall of the diffuser arranged in front of the air outlet, and is particularly provided at a position where there are many longitudinal components of the air flow. .

  On the other hand, if the length of the diffuser is shortened to reduce the size of the air conditioner, if the intake port is left in a position where there are many components in the vertical direction, the flow speed of the conditioned air passing therethrough will be high. Applicants' research has revealed that there is a risk of generating sound.

  The subject of this invention is providing the air conditioner which can suppress generation | occurrence | production of abnormal noise even if the length of a diffuser is short.

An air conditioner according to a first aspect of the present invention is an air conditioner provided with an air utilization unit that takes in a part of conditioned air directed toward an outlet and uses it for other functions, and is a multiblade fan rotor. And a fan casing. The fan casing collects air blown in the centrifugal direction from the multiblade fan rotor and guides it to the outlet. The fan casing includes a diffuser, a scroll, a tongue portion, and an intake port. The diffuser diffuses conditioned air toward the outlet. The scroll extends while curving away from the outer periphery of the multiblade fan rotor in a centrifugal direction, and is connected to the diffuser. The tongue is connected to the diffuser by curving toward the diffuser from the end of the wall closest to the outer periphery of the multiblade fan rotor in the scroll. The intake port guides conditioned air to the air utilization unit. Further, a first distance L1 that is the shortest distance between the first virtual plane including the opening end of the diffuser and the second virtual plane that is parallel to the first virtual plane and passes through the rotation center axis of the multiblade fan rotor; The ratio (L1 / L2) of the second distance L2, which is the shortest distance between the third imaginary plane and the second imaginary plane passing through the top of the tongue, is set to 2 or less. The intake port is arranged so as to cover a space surrounded by the first virtual plane, the fourth virtual plane orthogonal to the first virtual plane and passing through the apex of the tongue, and the diffuser wall adjacent to the tongue. . The diffuser is formed in an annular shape by the first wall, the second wall, the third wall, and the fourth wall. The first wall has an inclined surface adjacent to the tongue. The second wall faces the first wall. The third wall is adjacent to the first wall and the second wall on the suction side of the multiblade fan rotor. The fourth wall faces the third wall across the first wall and the second wall. The intake port passes through the triangular region of the third wall surrounded by the first wall, the first virtual surface, and the fourth virtual surface.

  Conventionally, the air intake port has been arranged at a position where the vertical component of the air flow is large, but if the length of the diffuser (the portion sandwiched between the first virtual surface and the third virtual surface) is shortened, At a position where there are many orientation components, the flow velocity becomes high, and there is a possibility that abnormal noise is generated.

  In this air conditioner, by arranging the air intake port so as to cover the space surrounded by the first virtual surface, the fourth virtual surface, and the wall adjacent to the tongue portion of the diffuser, Occurrence of abnormal noise is suppressed because the sideways component of the air flow having a slow flow velocity can be taken in.

Moreover, since the triangular area | region is adjacent to the 1st wall, the conditioned air which strikes the 1st wall is guided to the 1st wall, and is introduce | transduced into an intake port.

The air conditioner which concerns on the 2nd viewpoint of this invention is an air conditioner which concerns on a 1st viewpoint, Comprising: A 3rd wall has a guide surface which guides conditioned air to an intake port. In this air conditioner, the conditioned air before reaching the first wall is guided by the guide surface and introduced into the intake port.

The air conditioner according to a third aspect of the present invention is the air conditioner according to the second aspect, and the guide surface extends from the third wall to the outside of the diffuser from the intake port.

  In this air conditioner, the conditioned air along the guide surface is guided to the outside of the intake port, so that it is avoided that the conditioned air is pulled back to the diffuser side by dynamic pressure.

The air conditioner which concerns on the 4th viewpoint of this invention is an air conditioner which concerns on a 1st viewpoint, Comprising: The air utilization part has an active species production | generation means. The active species generating means generates an active species that decomposes, kills, or activates at least one of dust, odor molecules, viruses, and fungi floating in the air.

  In this air conditioner, sufficient conditioned air is introduced from the intake port to the air utilization unit, so that active species can be sufficiently generated by the active species generating means.

In the air conditioner according to the first aspect of the present invention, the air intake port is disposed so as to cover a space surrounded by the first virtual surface, the fourth virtual surface, and the wall adjacent to the tongue portion of the diffuser. By doing so, it becomes possible to capture a lateral component of the air flow that is close to the tongue and has a low flow velocity, so that the generation of abnormal noise is suppressed. In addition, conditioned air hitting the first wall is guided to the first wall and introduced into the intake port.

In the air conditioner according to the second aspect of the present invention, the conditioned air before reaching the first wall is guided by the guide surface and introduced into the intake port.

In the air conditioner according to the third aspect of the present invention, the conditioned air along the guide surface is guided to the outside of the intake port, so that it is avoided that the conditioned air is pulled back to the diffuser side by dynamic pressure.

In the air conditioner according to the fourth aspect of the present invention, sufficient conditioned air is introduced from the intake port into the air utilization unit, so that active species can be sufficiently generated by the active species generating means.

1 is an external perspective view of an air conditioner 100 according to an embodiment of the present invention. Sectional drawing of the said air conditioner 100 when the air conditioner 100 of FIG. 1 is cut | disconnected by an II plane. The disassembled perspective view of the air conditioner 100. FIG. The perspective view which shows the air passage of air typically. The rear view of the said scroll casing 53 and the rear frame 43 which deleted the wall of the back side of the scroll casing 53, and looked toward the back surface of the rear frame 43. FIG. The perspective view of the scroll casing 53 seen from the discharge port 50b side of the diffuser 54a. Piping system diagram of a refrigeration cycle unit 60.

  Hereinafter, embodiments of the present invention will be described with reference to the drawings. The following embodiments are specific examples of the present invention and do not limit the technical scope of the present invention.

(1) Outline of Air Conditioner 100 For convenience of explanation, terms representing each direction such as up, down, left, right, front (front), and back (rear) are used. Each of these directions means the direction shown in FIG. 1 unless otherwise specified.

  FIG. 1 is an external view of an air conditioner 100 according to an embodiment of the present invention. The air conditioner 100 is a device of a type installed on the floor of the target space in the state shown in FIG. The air conditioner 100 takes in the air in the target space from the side, harmonizes the inside, and supplies the conditioned air from above to the target space.

  The air conditioner 100 has a plurality of functions including a dehumidifying function for dehumidifying the air in the target space, a humidifying function for humidifying the air in the target space, and an air cleaning function for purifying the air in the target space. . That is, it can be said that the air conditioner 100 is a device that prepares air in the target space from not only the humidity side but also the purification side.

  Furthermore, the air conditioner 100 can be operated by individually selecting or combining a plurality of these functions. For example, when the dehumidifying function and the air purifying function are selected, the air conditioner 100 first takes in the air in the target space to remove dust and the like, then dehumidifies the air, and then further targets the air again. Operate to discharge into space. In addition, for example, when the humidification function and the air purification function are selected, the air conditioner 100 first takes in the air in the target space to remove dust, and then humidifies the air. Operate to discharge into the target space.

(2) Configuration of Air Conditioner 100 FIG. 2 is a cross-sectional view of the air conditioner 100 when the air conditioner 100 of FIG. 1 is cut along the II plane. 3 is an exploded perspective view of the air conditioner 100, and FIG. 4 is a perspective view schematically showing an air passage of air. In FIG. 3, the side wall panel 12 (see FIG. 1) is omitted to simplify the drawing as much as possible. 1 and 3, the air conditioner 100 includes a casing 10, an operation panel 20, and a main body 30.

(2-1) Casing 10
The casing 10 forms an outline of the air conditioner 100 and has a box shape. The casing 10 is configured by a combination of a plurality of casing members.

  The plurality of casing members include a front panel 11, a side wall panel 12, a rear panel 13, a bottom frame 14, and an outlet vane 15, all of which are formed of synthetic resin.

(2-1-1) Front panel 11
The front panel 11 is a plate extending in the vertical direction and substantially covers the front side of the main body 30.

(2-1-2) Side wall panel 12
The side wall panel 12 is a plate member that extends in the vertical direction, and constitutes the right side surface of the air conditioner 100 (more specifically, the side surface that is the right side of the air conditioner 100 when viewed from the front panel 11 side). To do. The side wall panel 12 is partially formed with a right inlet 12a, but substantially covers the right side of the main body 30 except for the vicinity of the inlet 12a.

  The right suction port 12a is elongated in the vertical direction at a portion of the side wall panel 12 close to the front panel 11. Air in the target space is sucked into the casing 10 from the right suction port 12a.

(2-1-3) Rear panel 13
The rear panel 13 is a plate member extending in the vertical direction while maintaining an L shape in plan view. The rear panel 13 constitutes the left side surface and the back surface of the air conditioner 100 (more specifically, the side surface and the rear surface on the left side of the air conditioner 100 when viewed from the front panel 11). A left suction port 13a is formed in a part of the rear panel 13 at a position facing the right suction port 12a across the front panel 11. That is, the left suction port 13a is elongated in the vertical direction, that is, in the vertical direction, in a portion of the rear panel 13 that becomes the left side surface of the air conditioner 100 and a portion close to the front panel 11. The rear panel 13 substantially covers the left side and the rear side of the main body 30 except for the vicinity of the left suction port 13a. Air in the target space is sucked into the casing 10 from the left suction port 13a.

(2-1-4) Bottom frame 14
The bottom frame 14 is a bottom portion of the casing 10 and has a rectangular shape elongated in the left-right direction in plan view. Each side of the bottom frame 14 is in contact with the lower ends of the front panel 11, the side wall panel 12, and the rear panel 13.

(2-1-5) Outlet blade 15
The air outlet blade 15 is a plate-like member provided on the back surface side above the main body portion 30. The air outlet blade 15 is in contact with a part on the back side of the upper end of the side wall panel 12, a part of a part on the left side of the upper end of the rear panel 13, and a part on the back side. The upper surface portion located on the back side is formed. Therefore, the outlet blade 15 is not in contact with the upper end of the front panel 11.

  The outlet blade 15 is rotatably attached to the rear panel 13 by a drive unit (not shown). When the operation of the air conditioner 100 is stopped, the air outlet blade 15 takes an open posture, and the blade 15 exposes a part of the main body 30 above the main body 30 via the air outlet 15a. Let Conversely, when the air conditioner 100 is operating, the air outlet blade 15 takes a closed posture. In this case, the air outlet 15 a is closed, and the upper portion of the main body 30 is covered with the air outlet blade 15.

  From the air outlet 15a that is not covered by the air outlet blades 15, the air that has been adjusted by the air conditioner 100 is supplied from the casing 10 to the target space. That is, the air outlet 15 a is formed on a part of the upper surface of the casing 10. In addition, the direction of the air blown from the blower outlet 15a is changed according to the angle which the blower outlet blade | wing 15 can take.

(2-2) Operation panel 20
The operation panel 20 is positioned on the front panel 11 side above the main body 30 and covers a portion of the upper portion of the main body 30 that is not covered by the outlet blade 15. That is, the operation panel 20 constitutes the upper surface of the casing 10 together with the air outlet blade 15.

  The operation panel 20 includes a button for turning on and off the operation of the air conditioner 100, a button for selecting at least one of a dehumidifying function, a humidifying function, and an air cleaning function of the air conditioner 100, and a current function. An LED or the like indicating the type of operation being performed is included.

  As shown in FIG. 3, the operation panel 20 is configured by stacking a printed circuit board 21, an operation panel cover 22, and an operation display lid 23 in order. Various components on the operation panel 20 and electrical components for operating the LEDs are mounted on the printed circuit board 21.

  The operation panel cover 22 forms the appearance of the operation panel. The operation display lid 23 protects the operation panel cover 22.

(2-3) Main body 30
The main body 30 is an assembly of various components necessary for the air conditioner 100 to realize a dehumidifying function and the like, and is an aggregate of various components housed in the casing 10.

  As shown in FIG. 3, the main body 30 includes a discharge unit 31, a filter unit 35, various frame members 41, 42, 43, a streamer discharge unit 45, a sirocco fan 50, a refrigeration cycle unit 60, a humidification unit 70, a dehumidification tank. A unit 80 is included.

(2-3-1) Discharge unit 31
The discharge unit 31 includes a right discharge unit 31a and a left discharge unit 31b. Each of these units 31a and 31b has a vertically long cylindrical shape extending in the vertical direction.

  The right discharge unit 31a is disposed in the vicinity of the right suction port 12a, and the left discharge unit 31b is disposed in the vicinity of the left suction port 13a. Therefore, air taken into the casing 10 from the right suction port 12a passes through the right discharge unit 31a, and air taken into the casing 10 from the left suction port 13a passes through the left discharge unit 31b.

  Each of the right discharge unit 31a and the left discharge unit 31b has a tungsten ionization wire as a positive electrode and a stainless metal plate-like electrode as a negative electrode. When a relatively high voltage is applied to the ionization wire that is the positive electrode, a potential difference is generated between the positive electrode and the negative electrode, and corona discharge occurs. By this discharge, dust in the air passing through the units 31a and 31b is charged.

(2-3-2) Filter unit 35
The filter unit 35 is for purifying the air taken into the casing 10 from the suction ports 12a and 13a, and is disposed in the vicinity of the suction ports 12a and 13a. In particular, the filter unit 35 is located on the most upstream side in the flow direction of the air flow AF (see FIG. 4) as compared to other components through which air passes.

  The filter unit 35 is configured such that a prefilter 36, a dust collection filter 37, and a deodorizing filter 38 are stacked one by one in order from the upstream side to the downstream side in the flow direction of the air flow AF.

  The pre-filter 36 is a filter through which air first passes among the various filters 36 to 38 constituting the filter unit 35. First, large dust is removed from the air taken into the casing 10 by the prefilter 36.

  The dust collection filter 37 is a filter having higher dust collection performance than the pre-filter 36. The dust collection filter 37 removes fine dust or the like contained in the air from which large dust has been removed, which are charged when passing through the discharge unit 31. In principle, fine dust in the air that has passed through the pre-filter 36 is adsorbed by charging the dust collection filter 37 to a pole opposite to the pole charged with dust.

  The deodorizing filter 38 is made of, for example, activated carbon, and passes air after fine dust is removed. The deodorizing filter 38 decomposes or adsorbs formaldehyde, odorous components and the like contained in the air.

(2-3-3) Frame members 41, 42, 43
The frame members 41, 42, and 43 are for supporting other components of the main body 30, and are all made of synthetic resin. Examples of the frame members 41, 42 and 43 include a front frame 41, a center frame 42 and a rear frame 43.

  The front frame 41 supports the filter unit 35 on the front panel 11 side, and supports the streamer discharge unit 45 on the upper part. As shown in FIG. 4, the front frame 41 is provided with two vertical air passage members 41a and 41b.

  The vertical wind passage members 41a and 41b are hollow members, are separated from each other, and extend elongated along the vertical direction. One vertical wind passage member 41a is located along the right suction port 12a on the side close to the right suction port 12a. The other vertical air passage member 41b is located on the side close to the left suction port 13a so as to be along the left suction port 13a.

  Air flows through the vertical wind passage members 41a and 41b. Each vertical wind passage member 41a, 41b has a plurality of discharge ports 41c, 41d arranged in the vertical direction, and passes through the vertical wind passage members 41a, 41b from the discharge ports 41c, 41d. Air is released.

  As shown in FIG. 3, the central frame 42 is provided on the rear side of the front frame 41. The center frame 42 supports the refrigeration cycle unit 60 on the front frame 41 side. The refrigeration cycle unit 60 is disposed between the central frame 42 and the front frame 41.

  Further, the central frame 42 supports the humidifying unit 70 on the rear panel 13 side that is the back side thereof. Further, the central frame 42 supports a dehumidifying tank unit 80 that stores water condensed during the dehumidifying operation on the back side and the lower side thereof.

  The rear frame 43 is provided on the rear side of the central frame 42. The humidifying unit 70 and the dehumidifying tank unit 80 are disposed between the center frame 42 and the rear frame 43. The rear frame 43 supports the electrical component box 85 at the upper part thereof.

  The electrical component box 85 houses a control unit 90 that controls various components of the air conditioner 100. The rear frame 43 supports the sirocco fan 50 on the back side thereof, and a bell mouth 43a having a bell mouth shape is provided at the center of the rear frame 43. The air that has flowed into the casing 10 through the suction ports 12a and 13a flows into the sirocco fan 50 by the bell mouth 43a.

(2-3-4) Streamer discharge unit 45
The streamer discharge unit 45 includes a discharge streamer body 45a and a discharge streamer guide 45b.

  The discharge streamer body 45a has a positive electrode and a negative electrode. The positive electrode is a needle-like electrode made of tungsten. The negative electrode is a plate-like electrode located in the vicinity of the positive electrode and facing the positive electrode. When a high voltage is applied to the needle-like electrode, streamer discharge, which is a kind of plasma discharge, is generated, and active species having high oxidative decomposition power are generated.

  The discharge streamer guide 45b guides the active species generated in the discharge streamer body 45a to the vertical wind passage members 41a and 41b in the front frame 41 together with air, as shown in FIG.

  The air containing the active species that has flowed into the vertical air passage members 41a and 41b is discharged from the discharge ports 41c and 41d to the outside of the front frame 41, and sequentially passes through the dust collection filter 37 and the deodorization filter 38 of the filter unit 35. At this time, the active species contained in the air decomposes and purifies dust, bacteria, and the like adsorbed on the dust collection filter 37.

(2-3-5) Sirocco fan 50
The sirocco fan 50 is for generating inside the casing 10 one air flow path that flows into the casing 10 through the suction ports 12a, 13a and flows out of the casing 10 through the outlet 15a. Only one unit is provided. As shown in FIG. 3, the sirocco fan 50 includes a fan rotor 51, a scroll casing 53, and a fan motor 55.

  The fan rotor 51 is connected to the output shaft of the fan motor 55 disposed on the rear side. When the fan motor 55 is driven, the drive of the fan motor 55 is transmitted to the fan rotor 51 via the output shaft, and the fan rotor 51 is driven to rotate. The driving fan rotor 51 sucks air from the front end side (that is, the front side) of the output shaft and blows it out in the radial direction.

  As shown in FIG. 2, the air that has passed through the filter unit 35 (dotted arrow) passes through the evaporator 64 and the condenser 62 and is sucked into the fan rotor 51. Since it is located on the upstream side and its height is lower than that of the condenser 62, air that cannot pass through the evaporator 64 even when the air volume increases is sucked into the fan rotor 51 by bypassing the evaporator 64. Therefore, an increase in noise is suppressed.

  The scroll casing 53 is a synthetic resin casing member having a scroll bending portion in which the fan rotor 51 is accommodated. The scroll casing 53 is fixed to the rear portion of the rear frame 43.

  The fan motor 55 can change its rotational speed stepwise. The rotational speed of the fan motor 55 is switched to the maximum output in the maximum air volume mode, and conversely to the minimum output in the minimum air volume mode.

(2-3-6) Scroll casing 53
The scroll casing 53 is fixed to the back surface of the rear frame 43 (see FIG. 3), whereby the air blown from the sirocco fan 50 in the centrifugal direction can be collected and guided to the air outlet 15a.

  On the front side of the scroll casing 53, an opening that is substantially the same as the size of the fan rotor 51 is formed when viewed from the front direction, and the opening functions as the suction port 50a of the sirocco fan 50.

  Further, an opening is formed in the upper portion of the scroll casing 53, and the opening functions as an outlet 50 b of the sirocco fan 50. The discharge port 50b is connected to the air outlet 15a, and when the air outlet 15a of the casing 10 is exposed, the discharge port 50b is also exposed.

  Further, a scroll flow path and a discharge flow path (diffuser) through which air flows are formed inside the scroll casing 53. The scroll flow passage is formed outside the outer peripheral surface of the fan rotor 51, and the discharge flow passage (diffuser) is formed so that the flow passage area increases as the distance from the tongue portion increases. The discharge channel (diffuser) communicates with the scroll channel and extends to the discharge port 50b. The air guided to the discharge channel (diffuser) is discharged from the discharge port 50b. Details will be described below with reference to FIGS.

  FIG. 5 is a rear view of the scroll casing 53 and the rear frame 43 viewed from the rear side of the rear frame 43 with the wall on the rear side of the scroll casing 53 removed. In FIG. 5, the scroll casing 53 has a diffuser 54a, a scroll 54b, a tongue 54c, and an intake 54d.

  The diffuser 54a is an annular discharge passage formed by four walls so that the cross section of the passage becomes smaller as the distance from the discharge port 50b decreases with the discharge port 50b as the upper end, and from the discharge port 50b toward the blowout port 15a. Has the function of diffusing conditioned air.

  FIG. 6 is a perspective view of the scroll casing 53 viewed from the discharge port 50b side of the diffuser 54a. 5 and 6, the diffuser 54 a includes a first wall 541 having an inclined surface adjacent to the tongue portion 54 c, a second wall 542 facing the first wall 541, and a first wall on the suction side of the fan rotor 51. The third wall 543 adjacent to the first wall 541 and the second wall 542 and the fourth wall 544 facing the third wall 543 across the first wall 541 and the second wall 542 are formed in an annular shape.

  The scroll 54 b is a wall including a curved surface that extends while curving away from the outer periphery of the multiblade fan rotor 51 in a centrifugal direction and is connected to the diffuser 54 a, and forms a scroll channel 54.

  The tongue portion 54c is a curved wall that warps toward the first wall 541 side of the diffuser 54a from the end of the wall of the scroll 54b closest to the outer periphery of the fan rotor 51 and is connected to the diffuser 54a.

  The intake 54d is an inlet for guiding conditioned air before going out from the outlet 50b to the streamer discharge unit 45 side.

  Here, for convenience of explanation, as shown in FIG. 5, the plane including the end of the discharge port 50b is a first virtual plane F1, and the second plane parallel to the first virtual plane F1 and passing through the rotation center axis of the fan rotor 51 is the second. A plane parallel to the virtual plane F2 and the first virtual plane F1 and passing through the apex of the tongue 54c is a third virtual plane F3, and a plane orthogonal to the first virtual plane F1 and passing through the apex of the tongue 54c is a fourth virtual plane F4. To do.

  Further, the shortest distance between the first virtual surface F1 and the second virtual surface F2 is a first distance L1, and the shortest distance between the third virtual surface F3 and the second virtual surface F2 is a second distance L2.

  In the air conditioner 100, the ratio (L1 / L2) between the first distance L1 and the second distance L2 is set to 2 or less. Conventionally, considering that this ratio (L1 / L2) has been set to exceed 2, the diffuser 54a is smaller than the conventional one.

Further, in the air conditioner 100, the intake port 54d is disposed so as to cover a space surrounded by the first virtual surface F1, the fourth virtual surface F4, and the wall of the diffuser 54a adjacent to the tongue 54c. Conventionally, inlet 54d were arranged vertically component often the position of the air flow, the length of the diffuser 54 a is shortened, the flow velocity is faster in the vertical component is larger position, abnormal noise May occur.

  According to the applicant's research, the inlet 54d is disposed so as to cover a space surrounded by the first virtual surface F1, the fourth virtual surface F4, and the tongue 54c of the diffuser 54a. It has been found that noise is eliminated. This is because the intake port 54d can take in a lateral component with a low flow velocity close to the tongue portion 54c, and the generation of abnormal noise is suppressed.

  The intake 54d passes through the triangular region of the third wall 543 surrounded by the first wall 541, the first virtual surface F1, and the fourth virtual surface F4. Since this triangular area is adjacent to the first wall 541, the conditioned air striking the first wall 541 is guided to the first wall 541 and introduced into the intake 54d.

  The third wall 543 is provided with a guide surface 54e that guides conditioned air to the intake port 54d. Since the guide surface 54e is an inclined surface and extends from the third wall 543 to the outside of the diffuser 54a rather than the intake port 54d, the conditioned air before reaching the first wall 541 is guided to the guide surface 54e. Are introduced into the intake 54d. Further, the conditioned air along the guide surface 54e is guided to the outside of the intake port 54d, so that it is not pulled back to the diffuser 54a side by dynamic pressure.

(2-3-7) Refrigeration cycle unit 60
Figure 7 is a piping diagram of a refrigeration cycle unit 60. The refrigeration cycle unit 60 includes a compressor 61, a condenser 62, and an evaporator 64. The refrigerant circuit 60a shown in FIG. 7 is configured by connecting the compressor 61, the condenser 62, and the evaporator 64 by refrigerant piping.

  The refrigeration cycle unit 60 mainly functions when the air conditioner 100 performs a dehumidifying operation. The refrigerant circulates in the refrigerant circuit 60a. Examples of the type of refrigerant include R134a and CO2.

  When the compressor 61 sucks the low-pressure gas refrigerant, the compressor 61 compresses the refrigerant to form a high-pressure gas refrigerant and discharges it. The compressor 61 is a compressor with a variable capacity.

  The condenser 62 includes a plurality of fins and a plurality of heat transfer tubes inserted into the fins, and condenses and liquefies the high-pressure gas refrigerant discharged from the compressor 61. Thereby, the air that has passed through the condenser 62 is heated by being given heat from the refrigerant. The refrigerant that has passed through the condenser 62 is decompressed in the capillary tube 63.

  The evaporator 64 is composed of a plurality of fins and a plurality of heat transfer tubes inserted into the fins, and evaporates the liquid refrigerant that has been decompressed by the capillary tube 63. Thereby, since the air that has passed through the evaporator 64 is absorbed by the refrigerant, the air itself is cooled, and the moisture contained in the air is condensed. That is, when the air conditioner 100 performs the dehumidifying operation, the evaporator 64 cools the air below the dew point temperature and dehumidifies it.

  When the air passes through the evaporator 64, at least a part of the moisture contained in the air is condensed to become water. This water is led to the dehumidifying tank unit 80 as drain water.

  The liquid refrigerant is removed by the accumulator 65 from the refrigerant that has passed through the evaporator 64. The refrigerant that has become only the gas refrigerant is again sucked into the compressor 61, compressed by the compressor 61, and discharged.

(2-3-8) Humidification unit 70
The humidifying unit 70 mainly functions when the air conditioner 100 performs a humidifying operation. As shown in FIGS. 3 and 4, the humidification unit 70 includes a humidification rotor 71, a storage portion 72, and a water tank 73.

  The humidifying rotor 71 is for temporarily holding water during the humidifying operation and for imparting the water to the air on the air flow path. The humidification rotor 71 has, for example, a structure in which a vaporization filter is attached to a ring frame. During the humidification operation, humidification is performed by water vaporizing from the vaporization filter.

  The humidification rotor 71 rotates using a humidification rotor motor (not shown) as a drive source. As the humidification rotor 71 rotates, water is taken up by the handle-like parts attached to the ring-shaped frame and supplied to the dry vaporization filter as it rotates. By the further rotation of the humidification rotor 71, the water in the part is vaporized and included in the air.

  The reservoir 72 is supplied with water from the water tank 73 and stores the water. The water tank 73 is a tank for supplying water to the storage portion 72, and is fixed to the inner surface portion of the side wall panel 12.

(2-3-9) Dehumidification tank unit 80
As shown in FIG. 3, the dehumidification tank unit 80 includes a dehumidification tank 81 and a lid 83. The upper part of the dehumidifying tank 81 is open so that drain water generated by the evaporator 64 can be stored. The lid 83 is disposed so as to cover the upper portion of the dehumidification tank 81, and prevents drain water stored in the dehumidification tank 81 from leaking to the outside of the dehumidification tank unit 80.

  Note that an opening 83 a is provided in the vicinity of the center of the lid 83. Thereby, drain water is once collected on the cover part 83, and is introduce | transduced in the dehumidification tank 81 through the opening 83a.

(3) Operation of Air Conditioner In the casing 10, one air flow path is formed by one sirocco fan 50. In this air flow path, the air that has flowed into the casing 10 from the suction ports 12a and 13a is integrated in the vicinity of the front panel 11, and the integrated air passes through the casing 10 from the front panel 11 side to the rear panel 13 side. And flows out of the casing 10 through the air outlet 15a in the upper part of the casing 10.

  The filter unit 35, the evaporator 64, the condenser 62, the humidification rotor 71, and the sirocco fan 50 are sequentially arranged in the air flow path. When the sirocco fan 50 is driven, an air flow AF shown in FIG. 4 is generated. The air flow AF flows into the casing 10 through the suction ports 12a and 13a and passes through the filter unit 35, whereby dust, odor components, and the like are removed. The air flow AF that has passed through the filter unit 35 is then dehumidified by the refrigeration cycle unit 60 or humidified by the humidification unit 70, and then blown out of the casing 10 through the outlet 15a, and again in the target space. Returned to

  A part of the air flow AF does not blow out of the air conditioner 100, but passes through the streamer discharge unit 45 as a branch flow BF from the diffuser 54a through the intake 54d. The tributary BF that has passed through the streamer discharge unit 45 flows into the vertical wind passage members 41a and 41b, and merges with the air flow AF that passes through the filter unit 35 via the discharge ports 41c and 41d.

(4) Features (4-1)
In the air conditioner 100, the ratio (L1 / L2) between the first distance L1 and the second distance L2 is set to 2 or less, and the diffuser 54a is smaller than the conventional one. Then, by arranging the intake port 54d for conditioned air so as to cover a space surrounded by the first virtual surface F1, the fourth virtual surface F4, and the tongue 54c of the diffuser 54a, a tongue is provided. Since the lateral component of the air flow that is close to the portion 54c and has a low flow velocity can be taken in, the generation of abnormal noise is suppressed.

(4-2)
The diffuser 54 a includes a first wall 541 having an inclined surface adjacent to the tongue 54 c, a second wall 542 facing the first wall 541, and the first wall 541 and the second wall 542 on the suction side of the fan rotor 51. An annular shape is formed by the adjacent third wall 543 and a fourth wall 544 facing the third wall 543 across the first wall 541 and the second wall 542. The conditioned air striking the first wall 541 is guided by the first wall 541 and introduced into the intake 54d.

(4-3)
The conditioned air before reaching the first wall 541 is guided by the guide surface 54e of the third wall 543 and introduced into the intake 54d.

(4-4)
Since the conditioned air along the guide surface 54e is guided to the outside of the intake port 54d, it is avoided that the conditioned air is pulled back to the diffuser 54a side by dynamic pressure.

(4-5)
Since introducing sufficient conditioned air to the streamer discharge unit 45 from the take - port 54d, it is possible to generate sufficiently active species by streamer discharge unit 45.

15a Outlet 45 Streamer discharge unit (active species generating means)
51 Multiblade fan rotor 53 Scroll casing (fan casing)
54a Diffuser 54b Scroll 54c Tongue 54d Inlet 54e Guide surface 100 Air conditioner

Japanese Patent No. 5051316

Claims (4)

An air conditioner provided with an air utilization unit that takes in part of the conditioned air toward the air outlet (15a) and uses it for other functions,
A multi-blade fan rotor (51);
A fan casing (53) that collects air blown in the centrifugal direction from the multiblade fan rotor (51) and guides the air to the outlet (15a);
With
The fan casing (53)
A diffuser (54a) for diffusing conditioned air toward the air outlet (15a);
A scroll (54b) extending while curving away from the outer periphery of the multiblade fan rotor (51) in a centrifugal direction and connected to the diffuser (54a);
The multi-blade fan rotor (51) said diffuser (54a) and the leading tongue most from the end of the adjacent wall to the outer circumferential curled to the diffuser (54a) side of said scroll (54b) and (54c),
An intake (54d) for introducing conditioned air to the air utilization unit;
Have
A first imaginary plane (F1) including the open end of the diffuser (54a) and a second imaginary plane (F2) passing through the rotation center axis of the multiblade fan rotor (51) parallel to the first imaginary plane (F1). A first distance (L1) that is the shortest distance between
A second distance (L2) which is the shortest distance between the third virtual surface (F3) parallel to the first virtual surface (F1) and passing through the apex of the tongue (54c) and the second virtual surface (F2); ,
Ratio (L1 / L2) is set to 2 or less,
The intake port (54d) includes the first virtual surface (F1), a fourth virtual surface (F4) orthogonal to the first virtual surface (F1) and passing through the top of the tongue (54c), and the tongue part (54c) and are arranged so that according to surrounded by the wall of the diffuser (54a) adjacent space,
The diffuser (54a)
A first wall (541) having an inclined surface adjacent to the tongue (54c);
A second wall (542) facing the first wall (541);
A third wall (543) adjacent to the first wall (541) and the second wall (542) on the suction side of the multiblade fan rotor (51);
A fourth wall (544) facing the third wall (543) across the first wall (541) and the second wall (542);
Is formed in a ring shape,
The inlet (54d) penetrates a triangular region of the third wall (543) surrounded by the first wall (541), the first virtual surface (F1), and the fourth virtual surface (F4). To
Air conditioner (100). The third wall (543) has a guide surface (54e) for guiding conditioned air to the intake port (54d).
The air conditioner (100) according to claim 1 . The guide surface (54e) extends from the third wall (543) to the outside of the diffuser (54a) from the intake port (54d).
The air conditioner (100) according to claim 2 . The air utilization part has an active species generating means (45) for generating an active species that decomposes, kills, or activates at least one of dust, odor molecules, viruses, and fungi floating in the air. ,
The air conditioner (100) according to claim 1.

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