JP2017040412A - Air conditioner - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an air conditioner which performs proper air conditioning operation according to an indoor environment.SOLUTION: An air conditioner has: a material detection part which detects a material of a floor surface in a room; and a control unit for controlling air conditioning operation based on the material detected by the material detection part. When the detected material is the first material (for example, a flooring material) in heating, the control unit increases quantity of air blown to the floor surface made of the first material, compared to a case where the detected material is a second material (for example, a carpet) having a larger number of irregularities on its surface than the first material.SELECTED DRAWING: Figure 4

Description

  The present invention relates to an air conditioner.

  Air that can provide air conditioning suitable for the environment by detecting the people in the air-conditioned room with the camera provided in the air conditioner body and changing the air-conditioning operation according to the distance to the person, the position of the person, the number of people, etc. Harmonic machines are widely known.

  In addition, the environment such as temperature spots in the air-conditioned room is detected by measuring the temperature in the air-conditioned room finely by an infrared sensor composed of a plurality of elements provided in the indoor unit body of the air conditioner. An air conditioner capable of improving indoor comfort by performing is widely known.

  In Patent Document 1, an air conditioner equipped with a far-infrared sensor performs air-conditioning control according to the temperature of the floor surface and wall surface while determining the room shape such as the floor surface and wall surface of the room from the temperature distribution in the air-conditioned room. Is disclosed.

JP 2010-91253 A

  The inventors focused on the “living off shoes in a room” unique to Japan when considering the comfort of the feet during heating. When heating, “warmth / coldness (contact thermal sensation)” felt by the feet is important, and the contact thermal sensation affects the body sensation.

  According to the applicant's survey on the floor of LDK (living room / dining room / kitchen), LDK has mainly flooring, about 50% is carpeted on the living side, and about 70% is not laid on the dining side. is there.

  Also, when relaxing in the living room in winter, about 70% of people spend their time with bare feet and socks. According to a qualitative survey, "the flooring in winter is like ice" and "the floor is chilly and the body is cold" There are many.

  Considering Japan's unique lifestyle, the goal is "heating that can be used with flooring and bare feet". One of the challenges to achieve this is that in LDK, there are carpets and tatami mats, mainly flooring, that is, floors with different “warmth and coldness” felt by the feet coexist. Is that the warm air that can be used with bare feet does not reach the feet.

  This invention is invention for solving the said subject, Comprising: It aims at providing the air conditioner which can perform an appropriate air-conditioning driving | operation according to the indoor environment.

  In order to achieve the above object, an air conditioner of the present invention includes a material detection unit that detects a material of an indoor floor surface, and a control unit that controls an air conditioning operation based on the material detected by the material detection unit. And when the detected material is a smooth first material (for example, flooring) at the time of heating, the control unit has a second material (for example, more irregularities on the surface than the first material) Compared with a carpet), the amount of air blown to the floor surface of the first material is increased. Other aspects of the present invention will be described in the embodiments described later.

  According to the present invention, an appropriate air conditioning operation can be performed according to the indoor environment.

It is a figure which shows the external appearance structure of the air conditioner which concerns on Embodiment 1. FIG. It is a figure which shows the structure of the indoor unit which concerns on Embodiment 1. FIG. It is a figure which shows the structure of the control part of the air conditioner which concerns on Embodiment 1. FIG. It is a figure which shows the air-conditioning control also considering the contact thermal sensation by the presence or absence of flooring determination, (a), (b) is the case where there is no flooring determination, (c) is the case where there is flooring determination. It is a figure which shows the area division | segmentation method of a room. It is a figure which shows the control block of the control part which concerns on Embodiment 1. FIG. It is a figure which shows the control range of an up-and-down wind direction board, (a) is a side view, (b) is a top view. It is a figure which shows the control range of a left-right wind direction board. It is a figure which shows the temperature detection range of a temperature detection means. It is a figure which shows the swing stop time of the left-right wind direction board based on floor surface temperature. It is a figure which shows the block configuration of the control part which concerns on Embodiment 2. FIG. It is a figure which shows the outline of the remote control which concerns on Embodiment 2. FIG. It is a figure which shows the structure of the indoor unit in which an up-and-down wind direction board has three blades in a longitudinal direction. It is a figure which shows the control range of an up-and-down wind direction board at the time of futon / carpet dehumidification implementation. It is a figure which shows the control range of the right-and-left wind direction board at the time of implementation of a futon and carpet dehumidification. The relationship between the surface shape of the object to be detected and the amount of reflected light received by the imaging means is shown, (a) is a diagram showing the case where the surface roughness of the object is large, and (b) is the figure of the object It is a figure which shows the case where surface roughness is small. It is a figure which shows the example of the wavelength absorptivity of the material of a detection target object. The relationship between the absorption rate of a detection target object and the light quantity of the reflected light received by an imaging means is shown, (a) is a figure which shows the case where the absorption rate of a target object is low, (b) is the absorption rate of a target object. It is a figure which shows the case where it is high. It is a figure which shows the method of removing the influence of the external light source by a difference process, (a) is a figure which shows the near-infrared image image | photographed with the imaging means in the environment where the material A and the material B were placed on the floor surface, b) is a diagram showing x-coordinate transitions of luminance values before and after irradiation in the material detection area, and (c) is a diagram showing x-coordinate transitions when a difference is taken from the luminance values before and after irradiation. It is. It is a figure which shows the correction | amendment by the image coordinate of the determination threshold value of a floor surface material. It is a figure which shows transition of the brightness | luminance difference value when an object exists in a room, (a) is a figure which shows the image image | photographed when there was an object in the center of a room, (b) is on a detection area It is a figure which shows transition of the luminance value.

DESCRIPTION OF EMBODIMENTS Embodiments for carrying out the present invention will be described in detail with reference to the drawings as appropriate.
<< Embodiment 1 >>
<Configuration of air conditioner>
FIG. 1 is a diagram illustrating an external configuration of an air conditioner according to the first embodiment. The air conditioner S is a device that performs indoor air conditioning such as cooling and heating using, for example, heat pump technology. The air conditioner S is roughly classified into an indoor unit 100 installed on an indoor wall, ceiling, floor, and the like, an outdoor unit 200 installed outdoors, and the indoor unit 100 via infrared rays, radio waves, communication lines, and the like. And a remote controller Re (remote controller, air conditioning control terminal) for the user to operate the air conditioner S. Moreover, the indoor unit 100 and the outdoor unit 200 are connected to the refrigerant pipe and a communication cable (not shown).

  The remote controller Re is operated by the user and transmits an infrared signal to the remote controller transmission / reception unit Q of the indoor unit 100. The content of the signal is a command such as an operation request, a change in set temperature, a timer value setting, an operation mode change, or a stop request. The air conditioner S performs air conditioning operations such as a cooling mode, a heating mode, and a dehumidifying mode based on these signals. In addition, information such as room temperature information, humidity information, and electricity bill information is transmitted from the remote control transmission / reception unit Q of the indoor unit 100 to the remote control Re, and the information is notified to the user.

  In addition, an imaging unit 110 for acquiring indoor image information, a near-infrared projector 115, a visible light cut filter 117, and a temperature detection unit 120 are installed in the lower part of the front surface of the indoor unit 100. The installation positions of the imaging unit 110, the near-infrared projector 115, the visible light cut filter 117, and the temperature detection unit 120 can be changed according to the purpose of acquiring image information described later, and are not limited to the positions shown in FIG. In this embodiment, the reason why the near-infrared projector 115 and the visible light cut filter 117 are provided is mainly for detecting the material of the floor (floor material), and the reason for providing the temperature detecting means 120 is that of the floor surface. This is for detecting the temperature, and details will be described later. In FIG. 1, the near-infrared projector 115 is provided at one place, but may be arranged at a plurality of places in the indoor unit 100.

  FIG. 2 is a diagram illustrating a configuration of the indoor unit according to the first embodiment. FIG. 2 is a side sectional view of the indoor unit 100 at the position of the imaging unit 110. The housing base 101 houses internal structures such as the heat exchanger 102, the blower fan 103, and the filter 108. The heat exchanger 102 includes a plurality of heat transfer tubes 102a, and heats the air taken into the indoor unit 100 by the blower fan 103 with a refrigerant flowing through the heat transfer tubes 102a to heat or cool the air. It is configured as follows. The heat transfer tube 102a communicates with the refrigerant pipe (not shown) and constitutes a part of a known refrigerant cycle (not shown).

  When the blower fan 103 shown in FIG. 2 rotates, the indoor air is taken in through the air suction port 107 and the filter 108, and the air heat-exchanged by the heat exchanger 102 is guided to the blowout air passage 109a. Furthermore, the air direction of the air guided to the blowout air passage 109a is adjusted by the left and right airflow direction plates 104 and the vertical airflow direction plate 105, and the air is blown from the air blowing port 109b to air-condition the room.

  The left and right wind direction plates 104 are rotated by a left and right wind direction plate motor (not shown) with a pivot shaft (not shown) provided at the lower part as a fulcrum according to an instruction from a control unit 60 (see FIG. 3) described later. Is done. The vertical wind direction plate 105 is rotated by a vertical wind direction plate motor (not shown) with pivot shafts (not shown) provided at both ends as fulcrums according to instructions from the control unit 60 described later. Thereby, the conditioned air can be blown to a predetermined position in the room.

  An imaging unit 110 and a visible light cut filter 117 are provided below the front panel 106 that is installed so as to cover the front surface of the indoor unit 100. The visible light cut filter 117 can be driven (moved) to the front surface of the imaging unit 110 by the filter driving unit 116. A near-infrared light projector 115 (see FIG. 1) and temperature detection means 120 (see FIG. 1) are installed at a position in the vertical direction of the paper not shown.

  In the present embodiment, it is desirable to use a resin that attenuates the wavelength region of 750 nm or less, which is the visible light region, as the characteristic of the visible light cut filter 117. However, the cut wavelength may be appropriately changed in accordance with the near-infrared irradiation wavelength region to be photographed. Further, the visible light cut filter 117 is replaced with a band-pass filter so that the light receiving area of the near infrared wavelength imaging means can be narrowed so that only a single wavelength area can be received. A configuration in which the influence of the light source is removed and the irradiation light from the near-infrared projector 115 can be easily received is also possible.

  The filter driving unit 116 has a function of executing processing for arranging the visible light cut filter 117 in front of the imaging unit 110 and processing for arranging it outside the imaging range of the imaging unit 110. The filter drive unit 116 is driven by a motor provided in the air conditioner S according to a drive signal of the control unit 60 (see FIG. 3) of the air conditioner S, for example, and moves the visible light cut filter 117. Is possible.

  Note that the filter driving unit 116 is controlled so that the visible light filter is disposed on the front surface of the imaging unit 110 when the control unit 60 instructs the material detection. Further, for example, when a stepping motor is used, the filter driving unit 116 can detect the position of the visible light cut filter 117. The detection of the position of the visible light cut filter 117 may be a method of detecting the position of the visible light cut filter 117 from the captured image of the imaging unit 110.

<Configuration of control unit of air conditioner>
FIG. 3 is a diagram illustrating a configuration of a control unit of the air conditioner according to the first embodiment. The sensor unit 50 is provided in the indoor unit 100 and the outdoor unit 200. The sensor unit 50 includes a room temperature sensor, a humidity sensor, a clock, an imaging unit 110, a temperature detection unit 120, an outside air temperature sensor, a compression temperature sensor, a refrigerant pipe temperature sensor, and the like.

  When the imaging means 110 is a CCD (Charge Coupled Device) image sensor, the imaging means 110 is installed at the lower center of the front panel 12 (see FIG. 2) in the left-right direction. In addition to this, a thermopile, an infrared sensor, a near infrared sensor, a thermography, a pyroelectric sensor, an ultrasonic sensor, and a noise sensor may be used. What is detected by the imaging unit 110 is not limited to the presence / absence or position of a person, but the amount of activity of a person, a life scene, a floor plan, or the like may be detected.

  When the temperature detection unit 120 is a thermopile, for example, the horizontal and vertical are composed of 1 × 1 pixel, 4 × 4 pixel, 1 × 8 pixel, and 8 × 8 pixel, and are installed at the lower center of the front panel 12 in the horizontal direction. Has been. In addition, an infrared sensor, a near infrared sensor, and a thermography may be used. What is detected by the temperature detecting means 120 is not limited to the average surface temperature in the room, but the surface temperature of the floor, the surface temperature of the person's clothing, the temperature of the person's skin, the temperature of the foot, the temperature near the foot, the person It may be the temperature of each part.

<Control unit>
The control unit 60 includes a floor plan detecting unit 64 that detects a floor plan of the room in which the indoor unit 100 is installed based on the imaging information of the imaging unit 110, an area dividing unit 65 that divides the floor of the room into areas, and the imaging unit 110. Floor material detection means 66 (material detection part) for detecting the material (floor material) of the indoor floor surface based on the imaging information of the above, and floor material for each area for discriminating the floor material for each area divided by the area dividing means 65 The human body based on the imaging information of the floor surface temperature detecting means 62 for each area and the imaging means 110 for detecting the temperature of the floor surface for each area divided by the area dividing means 65 based on the detection information of the determining means 67 and the temperature detecting means 120. Human body detection means 63 (human body detection unit) for detecting the human body, floor material temperature determination means 68 for the person position to determine the temperature of the floor material at the position of the person detected by the human body detection means 63, air conditioning control means 69, memory With a 70, and the like. The control unit 60 is provided in an electrical component (in the electrical component box). Based on information from the remote controller Re and the sensor unit 50, the control unit 60 includes the blower fan 103, the left and right wind direction plates 104, the upper and lower wind direction plates 105, and the like of the indoor unit 100. Control. Further, the control unit 60 controls the compressor 202, the propeller fan 207, and the like of the outdoor unit 200. The control unit 60 also controls the filter driving unit 116 that rotates the imaging unit 110, the near-infrared projector 115, and the visible light cut filter 117.

  The storage unit 70 includes, for example, a ROM (Read Only Memory), a RAM (Random Access Memory), and the like. Then, the program stored in the ROM is read out by a CPU (Central Processing Unit) of the control unit 60, developed in the RAM, and executed.

  With the above-described configuration, the control unit 60 operates the air conditioner S in accordance with image information input from the imaging unit 110, command signals input from the remote controller Re, sensor outputs input from various sensors, and the like. Through comprehensive control, detailed operation control is possible.

  By the way, the information handled by the control unit 60 includes detected floor surface material information, floor surface temperature information, information on the position / activity of the occupants, and detected object shape / position / distance information. There may be a configuration that does not include image information (visible light image) that a person can visually recognize as an image. As a result, not only can the amount of data held in the storage unit 70 be reduced, but the image information is essentially not taken out of the control unit 60. A configuration that can be protected can be realized.

  FIG. 4 is a diagram illustrating air conditioning control that also considers contact thermal sensation depending on the presence or absence of flooring determination. (A) and (b) are when there is no flooring determination, and (c) is when there is flooring determination. It is. According to the investigation by the present inventors, the floor surface temperature at which the human foot feels cool at room temperature of 24 ° C. during heating is 24.0 ° C. for carpets, 25.5 ° C. for flooring, 1.5 There is a temperature difference of ℃. As a result, it was found that by controlling (controlling) the surface temperature of the floor to an appropriate temperature for each floor material, warm and comfortable heating can be performed from the standpoint of power saving. This difference is due to the contact thermal sensation due to the difference in floor surface. Control is performed in consideration of the thermal sensation of contact.

  As shown in FIG. 4, it is assumed that the indoor unit 100 is installed on a wall 331. When a person is present at the same time in the living room of the carpet and the dining room in the LDK, usually at a set temperature of 24 ° C. (for example, an air temperature of 36 ° C. from the air outlet 109b). When the heating operation is carried out, the carpet surface temperature on the living side near the indoor unit 100 becomes 27 ° C., and the floor surface temperature on the dining side far from the indoor unit 100 becomes 24 ° C. as shown in FIG. The floor temperature at which the human foot does not feel cool at room temperature of 24 ° C is 25.5 ° C in the flooring. Under these conditions, the person living in the flooring feels cool and uncomfortable. I feel it.

  At this time, the set room temperature is set to 27 ° C. (for example, from the air outlet 109b) so that the floor surface is 25.5 ° C. at a temperature at which the person staying in the flooring does not feel the flooring cool. When the air temperature is increased to 39 ° C., the floor surface temperature on the dining side far from the indoor unit 100 becomes 25.5 ° C., which is comfortable. However, the carpet surface temperature on the living side near the indoor unit 100 is 29.5 ° C., and the ambient temperature of the person on the living side becomes slightly hot. If only the set temperature is simply raised, it is too warm and wastes power.

  On the other hand, when the air conditioning control suitable for the flooring is performed as shown in (c), the living room side close to the indoor unit 100 while the floor surface temperature on the dining side far from the indoor unit 100 is set to 25.5 ° C. The carpet surface temperature is 26 ° C., both of which are comfortable, and the set room temperature can be lowered to 24 ° C.

  In the present embodiment, floor material detection means 66 (material detection part) for detecting the material of the indoor floor surface, and air conditioning control means 69 (control part) for controlling the air conditioning operation based on the material detected by the material detection part. And have. When the detected material is a first material (for example, flooring) during heating, the control unit compares the detected material with a second material (for example, carpet) having more irregularities on the surface than the first material. Thus, the amount of air blown to the floor surface of the first material can be increased. For this reason, an appropriate air conditioning operation can be performed according to the indoor environment.

  In addition, when the detected material is the first material (for example, flooring) at the time of heating, the control unit includes a second material (for example, carpet) having more unevenness on the surface than the first material. In comparison, the target temperature set on the floor surface of the first material may be increased. Specifically, in flooring, it is about 1.5 ° C. higher than the carpet.

  FIG. 5 is a diagram showing a room area dividing method. The floor plan (floor surface) is detected by the floor plan detecting means 64, and the floor surface is divided into, for example, six in the horizontal direction (X direction) and the vertical direction (Z direction), respectively. The material is judged. With regard to this division, there is no particular problem whether the X direction and the Z direction are 4 divisions or 12 divisions, or 20 divisions in the X direction and 10 divisions in the Z direction. As the number of divisions increases, the accuracy improves, but the processing time. Cost. When flooring and carpet coexist in the divided area, the one with higher occupancy is given priority. A part with furniture is recognized as having furniture, and temperature control by the flooring of that part is not performed. However, if the furniture that the furniture occupies is the furniture through which airflow passes and the temperature near the feet can be detected, it is considered to be the same as the material connected to the floor material on the front and back, left and right. Control according to the flooring.

  The method for determining the material is that the visible light cut filter 117 is arranged on the front side of the image pickup means 110, so that light in the visible light wavelength band is attenuated (or reflected) by the visible light cut filter 117, and other than visible light. The light in the wavelength band passes through the visible light cut filter 117. That is, light including ultraviolet rays, near infrared rays, and far infrared rays passes through the visible light cut filter 117. At this time, near-infrared light is emitted from the near-infrared projector 115 of the indoor unit 100, and the floor material is determined based on the reflectance. Details of the material determination method will be described later with reference to FIGS. Alternatively, it can be set by a method in which such a special determination means is not provided and the remote controller Re inputs each area where the floor material is divided. A setting method using the remote controller will be described later in a second embodiment.

  FIG. 6 is a diagram illustrating a control block of the control unit according to the first embodiment. The floor plan detection unit 64 detects the floor plan of the air-conditioned room (room) from the image captured by the imaging unit 110. The floor plan detection unit 64 stores the floor plan detection result in the storage unit 70, and the area division unit 65 divides the floor plan of the air conditioning room into areas. The divided image of the area is the above-described FIG.

  Separately from the above, the floor material detection means 66 discriminates the floor material from the image taken by the imaging means 110. When detecting the floor material, as described above, the visible light cut filter 117 is disposed on the front side of the imaging means 110, the near infrared light is emitted from the near infrared projector 115, and the material of the floor is determined by the reflectance. To do. The floor material discriminating means 67 for each area matches the detected floor material with the floor layout divided into areas, and discriminates the floor material for each area.

  Apart from the above, the human body detection means 63 detects the position of the human body from the image taken by the imaging means 110.

  Further, the floor surface temperature detection means 62 for each area detects the temperature of each area from the temperature data acquired by the temperature detection means 120.

  The person's position floor material temperature determination means 68 determines the floor material at the person's position and the temperature of the floor material, and determines whether or not the target temperature for each material has been reached. In response to the determination result, the air conditioning control means 69 performs air conditioning control. The air conditioning control means 69 controls the left and right wind direction plates 104, the up and down wind direction plates 105, the set temperature, the air volume, and the like according to the position of the person. Hereinafter, the implementation method will be described with reference to FIGS.

  7A and 7B are diagrams showing the control range of the up and down wind direction plate, where FIG. 7A is a side view and FIG. 7B is a plan view. In the heating operation, control is performed so that the wind direction plate is directed toward the person, particularly near the feet. Here, in order to send a wind toward a person's feet, the depth direction (Z direction) of the room is divided into ten. The required swing range of the vertical wind direction plate 105 is determined depending on which area of the 10 divided areas is present. For example, when there are people in A3 and A7, the vertical wind direction plate 105 swings between A3 and A7. In addition, by swinging the wind sending range from A3 to A8, a range from one before the range where the person is present, the warm air surely reaches the person's feet, so the comfort level is further improved.

  FIG. 8 is a diagram illustrating a control range of the left and right wind direction plates. In the heating operation, control is performed to direct the wind direction plate to a place where a person is present. In FIG. 8, the control range of the left and right wind direction plates 104 is divided into 20 parts, and the necessary swing range of the left and right wind direction plates 104 is determined depending on which area of the 20 divided areas is located. For example, when there are people in B3 and B6, the left and right wind direction plates swing between B3 and B6. Further, when the swing is stopped for about 2 seconds at a position where a person is present, the comfort level is improved. Furthermore, if the swing range is set not only to B3 to B6 where people are present but also B2 to B7, which is one range wider than the range where people are present, the warm air surely wraps around the area where people are present, so the comfort level is further increased. Will improve.

  At this time, if the person in B3 is on the carpet and the person in B6 is on the flooring, when swinging the left and right wind direction plate 104, first stop the swing at B6 where the person is on the flooring The time to do is further increased by 2 seconds.

  The area temperature of each person's feet is detected, and the above-mentioned "surface temperature of the floor surface where the human foot feels cool" is set as the air conditioning control target value for each floor material. Change the swing stop time of the left and right wind direction plates for the area where

  Combining the control of the up / down wind direction plate 105 and the control of the left / right wind direction plate 104 shown in FIGS. 7 and 8 makes it possible to send comfortable warm air near the feet of a person.

  FIG. 9 is a diagram showing a temperature detection range of the temperature detection means. With reference to FIG. 9, the temperature detection of the floor surface by the temperature detection means 120 is demonstrated. When the temperature detection means 120 is a thermopile, the thermopile detection element is a heat receiving element arranged one-dimensionally. By rotating the thermopile with the arrangement direction of the detection elements as a rotation axis, scanning is performed in a direction perpendicular to the arrangement direction of the detection elements. Thereby, a two-dimensional radiant heat image of 8 pixels can be acquired in the vertical direction. It is possible to acquire a thermal image of 20 × 8 pixels with an angle of view of 150 ° in the scanning direction (horizontal direction) of the acquired image. From this temperature detection result, the floor material temperature at the position of the person is determined.

  FIG. 10 is a diagram showing the swing stop time of the left and right wind direction plates based on the floor surface temperature. With reference to FIG. 10, the time for changing the swing stop time of the left and right wind direction plates 104 will be described. When the target temperature has not been reached, 1 second is added, and after the target temperature is reached, there is no addition. Further, when the target temperature reaches + 1 ° C., 1 second subtraction is performed. By this control, the difference in the sensation due to the floor material is alleviated.

  The same thing can be done with the up-and-down wind direction plate 105. However, the up-and-down wind direction plate 105 is a wind direction plate that can be seen from the outside. In the board 105, it is considered appropriate to add only the stop time of the upper limit position and the lower limit position of the swing and not stop in the middle.

  In this embodiment, it is possible to know the material of the floor surface that directly touches the foot in “living off shoes in a room” unique to Japan. In addition, warm air that matches the material of the floor at the position of the person can be delivered to each location. That is, it is possible to adjust the amount and time of the wind applied according to the material of the floor surface at the position of the person.

  For example, during heating, the carpet (second material) side is conventionally warmed in the same manner as the flooring (first material) side. On the other hand, in this embodiment, in order to suppress overheating on the carpet side, the warm air sent to the carpet side is reduced, and the warm air is sent to the flooring side accordingly, so that all people in the room can use the flooring. It is possible to save energy without feeling cold.

<< Embodiment 2 >>
In the first embodiment, the floor material is detected by the floor material detection means 66, but in the second embodiment, a floor material setting method using the remote controller ReA (input unit) (see FIG. 12) or the like will be described.

  FIG. 11 is a diagram illustrating a block configuration of a control unit according to the second embodiment. In FIG. 11, the same elements as those of the first embodiment shown in FIG. The user inputs the floor plan of the air-conditioned room by the floor plan input means 131 that is the input means of the remote controller ReA, and the floor material setting means 132 sets the floor material for each area for the air-conditioned room. The floor plan and flooring input results are stored in the storage means 70 via the transmission / reception unit 45. The floor material discriminating means 67 for each area discriminates the floor material for each area based on the input result of the storage means 70.

  FIG. 12 is a diagram illustrating an outline of the remote controller according to the second embodiment. The floor plan input unit 131 of the remote controller ReA will be described as a touch panel unit. The storage unit of the remote control ReA stores layout information for setting a floor plan, room size information, and element information of the indoor unit 100 and furniture around the living room. The processing unit of the remote control ReA Has a setting mode. When there is a floor plan setting request, the processing unit of the remote controller ReA touches a selection screen based on layout information, a selection screen based on area information, and an arrangement request screen using element information via the floor plan input means 131. Displayed in the section. And based on the screen operation of a touchscreen part, the floor plan information which installs the indoor unit 100, and the arrangement | positioning information of the indoor unit 100 and fixtures in the floor plan are registered into a memory | storage part as a user's floor plan information. In the layout setting, layout selection, area selection, the position of the air conditioner of the indoor unit 100 and the position of the related fixtures, and the direction of the living room, the living room, and the like can be set.

  After completing the floor plan input, the floor material setting means 132 displays the type of floor material. In FIG. 12, carpet and flooring are displayed as an example. Flooring is specified as the initial setting. When the user changes to the carpet, after touching the carpet portion 135 with the finger and touching a predetermined area in the floor plan area 136 with the finger, the flooring is changed to the carpet.

  In the present embodiment, the remote control ReA can be used to input the floor plan of the air conditioning room and set the flooring. By having the remote controller ReA set manually, air conditioning control according to the flooring of the air conditioning room can be performed without installing a special sensor in the air conditioner.

<Other air conditioner examples>
FIG. 13 is a diagram showing a configuration of an indoor unit in which the vertical wind direction plate has three blades in the longitudinal direction. Compared with the indoor unit 100 shown in FIG. 2, the up / down wind direction plate 105 has an upper up / down wind direction plate and a lower up / down wind direction plate upper plate, and the upper up / down wind direction plate is roughly divided into three in the left / right direction, The left blade 105aa, the central blade 105ab, and the right blade 105ac are configured. Similarly, the lower vertical wind direction plate is roughly divided into three in the left-right direction, and includes a left blade 105ba, a central blade 105bb, and a right blade 105bc.

  In an indoor unit in which the vertical wind direction plate is divided into three in the left-right direction as shown in FIG. 13, one of the two is on the carpet and the other is on the flooring as shown in FIG. In this case, after detecting the position of the person and the material of the floor, two of the three vertical airflow direction plates 105 are directed toward the person on the flooring (first material). Point the remaining one at someone on the carpet (second material). By performing this control, it becomes possible to warm the person in the flooring faster.

  For example, when the flooring is warmed quickly and reaches the target temperature, for example, when the flooring is close to the indoor unit 100, a pair of up and down wind direction plates (for example, the left blades 105aa and 105ba) is on the person on the carpet. One set of up and down wind direction plates (for example, right blades 105ac and 105bc) and the remaining up and down wind direction plates (for example, center blades 105ab and 105bb) are equalized by swinging between a person on the flooring and a person on the carpet Can be planned.

  In addition, when all the floor materials at the position where the person is present are the same, the control is performed with priority on other influences. For example, two of the up-and-down wind direction plates 105 divided into three are directed toward a person far from the indoor unit. Direct the remaining one to someone who is nearby. By carrying out this control, it becomes possible for a person who is far from an indoor unit that is difficult to warm up to warm up more quickly.

  In addition, the division | segmentation of the left-right direction of the up-down wind direction board 105 is not restricted to 3 divisions, but when there are more divisions, such as 4 divisions, a control width will spread.

  If the floor temperature relative to the room temperature does not reach the target temperature even when this control is performed, the set temperature of the room is adjusted so that the floor temperature rises. Here, flooring and carpet have been described as typical examples, but in the case of tatami mats, detection is possible due to the difference in reflectance of near-infrared rays. The surface temperature is 24.5 ° C. for carpets and 25.5 ° C. for flooring, whereas 24.5 ° C. for tatami mats. When tatami mats are detected, the same control as carpet flooring is performed.

<Example when dehumidifying>
FIG. 14 is a diagram illustrating a control range of the up and down wind direction plates when performing futon / carpet dehumidification. FIG. 15 is a diagram showing the control range of the left and right wind direction plates when performing futon / carpet dehumidification. The floor material detection means 66 detects futons and carpets in the same manner as the floor material. The up-and-down wind direction plate 105 is swung as shown in FIG. 14 with respect to the detected futon and carpet. At this time, the up-and-down wind direction plate 105 is an example in the case of being divided into three in the left-right direction shown in FIG. The up / down wind direction board 105 is swung according to the futon / carpet existing in the area in charge of each up / down wind direction board 105, and the wind is evenly sent to the target futon / carpet.

  Here the right futon / carpet is between A5 and A8. The left futon / carpet is between A2 and A5. Since both overlap the area in charge of the central blades 105ab and 105bb, the central blades 105ab and 105bb swing between A2 and A8, the right blades 105ac and 105bc swing from A5 to A8, and the left blades 105aa and 105ba swings A2 to A5, and can efficiently send wind to the area where futons and carpets exist.

  Further, as shown in FIG. 15 for the left and right wind direction plates 104, for example, when the left and right wind direction plates 104 are divided into two, each controls. In the embodiment of FIG. 15, the left and right wind direction plates 104 on the left side send wind to B5 to B9 so as to send the wind evenly to the futons and carpets on the left side. The right and left wind direction plates 104 on the right side send the wind to B12 to B19 so as to send the wind uniformly to the futons and carpets on the right side. When the left and right wind direction plates 104 are not divided, the wind is sent by swinging B5 to B19 in the range where futons and carpets are detected. The operation mode is a dehumidifying operation, the wind speed is switched to a higher value, and the futon / carpet is dampened.

  This dehumidifying operation gives priority to removing moisture from futons and carpets. When room temperature is low, heating operation is carried out and hot air is applied to futons and carpets to promote the drying effect of futons and carpets. It is also possible to implement an operation that prioritizes this. It is also effective to switch to a dehumidifying operation after that in order to reduce the humidity increased by the heating. This operation mode is based on the condition that it is activated when the imaging means 110 detects that there is no person, considering that it is somewhat uncomfortable when the person is in the room, such as when the room temperature rises. Also good.

  Alternatively, by setting a dedicated button on the remote controller Re and operating it only when the user arbitrarily presses this button, it is possible to prevent unintended air conditioning. If the futon / carpet cannot be detected when set with the dedicated button on the remote control Re, it is considered that the futon / carpet cannot be detected against the user's intention, and the futon is placed outside the range that can be detected by the imaging means 110.・ Implement wind direction control assuming that there is carpet. For example, in the case of the present embodiment, since detection is difficult when it is placed directly under the indoor unit 100, if it cannot be detected, the wind should be directed around the vicinity of the indoor unit 100. .

<Details of flooring detection means>
Next, the near infrared imaging and flooring detection means 66 will be described in detail.

<Near infrared photography>
[Characteristics of near infrared photography]
It is generally known that the near infrared absorption rate of an object depends on the molecular structure of the object. For example, when a carpet with a pattern or a flooring material with a grain is photographed in the visible light region, even if the same material is used, multiple color information is acquired due to the effects of dyes and pigments. In the case of taking a picture, the near-infrared absorptance depends on the molecular structure of the subject, so that it is possible to obtain image information of similar colors if the same material is hardly affected by the dye and the pigment.

[Wavelength region to irradiate in near infrared photography]
If it is 750 nm or more in the infrared wavelength region, it will be difficult to catch the near infrared ray irradiated with the naked eye, and the occupants will not be uncomfortable. Further, it is known that, unlike visible light, when near-infrared light hits an object, the absorption rate of the near-infrared light with respect to the object depends on the molecular structure of the object. The near-infrared light image has a feature that it is easy to distinguish the material on the image because different color tone information is obtained from the image information acquired by the imaging unit 110 for each material.

  Although it is also possible to use a wavelength in the far-infrared region (3000 nm or more) generally used in a thermo camera or the like, far-infrared light is emitted by all objects as light sources, and the amount of far-infrared light generated is Mainly affected by the temperature of the object. For this reason, it is extremely difficult to separate information that is caused by the light irradiated by the projector and image information that is caused by the temperature of the object, so that it is not suitable as an imaging wavelength region. The wavelength band of 1000 nm or less is a wavelength band close to visible light, and there are many light receiving sensitivities in general-purpose image sensors. Therefore, in the present embodiment, it is desirable to have a configuration capable of irradiating with an infrared wavelength of 750 nm to 1000 nm irradiated by the projector.

<Description of Data Acquired by Imaging Unit by Near-Infrared Irradiation>
[Acquired image based on surface shape and material to be detected]
In general, after the near-infrared light irradiated from the near-infrared projector 115 hits the object, the object is reflected such as specular reflection / diffuse reflection, absorbed and converted into heat and chemical energy, and the object. Can be broadly divided into those that pass through as they are.

At this time, it is possible to determine the material of the object from the captured image by acquiring the amount of light reflected by the near-infrared light irradiated from the near-infrared projector 115 by the imaging unit 110. At this time, there are two types of reflected light acquired by the imaging means depending on the angle of the object.
(1) When the light hitting the object is specularly reflected and the light enters the imaging means,
(2) The case where the light hitting the object is diffusely reflected and the light enters the imaging means. The light amounts of the specular reflection light and the diffuse reflection light have opposite characteristics depending on the material and surface shape of the object.

[Reflected light intensity by surface shape]
In general, the reflected light returns to the imaging unit 110 and is acquired as image information acquired by the imaging unit 110. The amount of received light acquired by the imaging means 110 depends on the distance from the near-infrared projector 115 to the object, the diffusivity and the absorption rate of the material of the object.

  As for the diffusivity, when the angle of the object is perpendicular to the irradiation light and the specular reflection light directly enters the imaging means, the larger the diffusivity, the smaller the amount of light received by the imaging means 110, and the diffusivity becomes larger. The smaller the amount, the larger the amount of light received by the imaging means 110.

  When the angle of the object is perpendicular to the irradiation light and the specular reflected light does not directly enter the imaging unit, the diffused light returns to the imaging unit 110 and is acquired as image information acquired by the imaging unit 110. The

  FIG. 16 shows the relationship between the surface shape of the object to be detected and the amount of reflected light received by the imaging means, (a) is a diagram showing the case where the object has a large surface roughness, and (b) These are figures which show the case where the surface roughness of a target object is small. As shown in FIG. 16, in the case where the mirror-reflected light does not directly enter the imaging unit 110, the amount of light received by the imaging unit 110 increases as the diffusivity of the object increases. Diffusivity is small when the surface shape is close to a flat surface, such as a complex shape with complicated surface shape, a rough texture, or a rough surface that is large and mirror-finished. Become. Since the characteristics are reversed between specular reflection light and diffuse reflection light, it is necessary to determine the angle of the object in the near-infrared projector 115 and the imaging means 110.

[Reflected light intensity by material]
FIG. 17 is a diagram illustrating an example of the wavelength absorptance of the material of the detection target. FIG. 18 shows the relationship between the absorption rate of the detection object and the amount of reflected light received by the imaging means, (a) is a diagram showing the case where the absorption rate of the object is low, and (b) is the object. It is a figure which shows the case where the absorption rate of is high.

  The near infrared absorptance is specific to the material. An example of a material having an absorption spectrum shown in FIG. 17 will be described. For example, when there is a material A having a rising absorption spectrum shown in FIG. 17 and a material B having a mountain-shaped absorption spectrum, and under the same surface shape, the irradiation wavelength A is irradiated, The material B having a high absorption rate in the wavelength band has less diffused light returning to the imaging unit 110 (see FIG. 18B), and the material A having a low absorption rate in the irradiation wavelength band returns to the imaging unit 110. (See FIG. 18A), the brightness value of the image information is higher in the material A than in the material B. Therefore, if the distance, angle, and surface shape of the object are known in advance, the material can be identified by acquiring the amount of reflected light as a luminance value with an imaging means if the material has a difference in absorption rate. is there.

  Further, when the irradiation wavelength B is irradiated, the luminance value of the image information is higher for the material B than for the material A, and the image information having the reverse tendency is acquired. Therefore, it is desirable to irradiate a wavelength region having a difference in absorption rate according to the type of material to be identified. In addition, as a configuration capable of emitting two or more types of wavelengths from the near-infrared projector 115, it is also possible to improve the material detection accuracy by acquiring image information of a plurality of wavelength regions.

[Effect of reflection intensity depending on the distance of the object to be measured]
The light irradiated from the near-infrared projector 115 attenuates the amount of light that reaches the light in inverse proportion to the square of the distance of the object. Therefore, the distance of the detection target must be known. However, if the object to be detected is a plane and the position and angle relationship with the indoor unit 100 is clear, it can be estimated from the image information of the imaging means 110. For example, if the object of material detection is the floor surface, and it is known that the installation height and the installation angle of the air conditioner are almost constant in a general home, the distance and angle of the floor surface is the image of the imaging means. It is possible to estimate from the information.

<Processing of flooring detection means (material detection unit)>
The floor material detection unit 66 (material detection unit) performs (1) external light noise removal processing by difference processing, (2) correction processing by the distance of the discrimination threshold, and (3) human body / furniture exclusion processing by difference processing. In the embodiment, as an example, a method for performing determination when the detection target is a floor material and the types are carpet, flooring, and tatami are described. Further, when the detection target is a flooring material, there are some individual differences, but the surface shape is almost determined for each flooring material. Therefore, the material determination is performed by combining the influence of the diffusion rate and the absorption rate and defining the threshold value with the luminance information photographed by the imaging unit 110. The determination threshold will be described later.

[(1) External light noise removal processing by difference processing]
FIG. 19 is a diagram showing a method of removing the influence of an external light source by difference processing, and FIG. 19A is a diagram showing a near-infrared image photographed by an imaging means in an environment in which material A and material B are placed on the floor surface. (B) is a diagram showing the x-coordinate transition of the luminance value before and after irradiation in the material detection area, and (c) is the x-coordinate when the difference is taken from the luminance value before and after irradiation. It is a figure which shows transition.

  In an indoor environment where an air conditioner is used as shown in FIG. 19 (a), when light is incident on the air-conditioned room from an external light source such as during the day, the influence of near-infrared rays of various wavelengths included in the external light The image information in which is added is acquired.

  As described above, since the absorption rate of near-infrared light of an object varies depending on the wavelength, if there is an influence of a plurality of wavelengths irradiated from another light source (external light source 91) such as sunlight or indoor lighting, an error occurs in material detection. It becomes a detection factor. Therefore, in order to detect the material, it is desirable to acquire image information only from the irradiation light from the near-infrared projector 115. Therefore, the near infrared projector 115 solves this by performing differential processing for measuring the amount of change between the image before irradiation with near infrared light and the image after irradiation with near infrared light.

  FIG. 19A is an explanatory diagram of a near-infrared image captured by the imaging unit 110. The near-infrared image includes an indoor floor 333, a wall 334 in front of the indoor unit 100, a right wall 335 as viewed from the indoor unit 100, and a left wall 336 as viewed from the indoor unit 100. There is a material detection area 92 as an area detected by the floor material detection means 66 (material detection unit).

  Here, the difference process is a process for calculating a difference in image information for each pixel coordinate of two images. In the difference processing of the present embodiment, as shown in FIGS. 19B and 19C, the image means 110 acquires and uses the luminance value of the image when the near infrared light is not irradiated and when the near infrared light is irradiated. However, this is only an example, and it is only necessary to be able to detect the effect of the absorption factor and reflectance on the near infrared ray by the difference processing. For example, the difference processing of the images taken when the near infrared rays of different wavelengths are irradiated is performed. Even so, the same effect can be obtained. In the image information, the tone information is converted to gray scale and used as luminance information. By performing this difference processing, it is possible to remove the influence of incident light from the external light source and acquire information on only the amount of change in luminance due to irradiation from the near-infrared projector 115.

[(2) Correction processing based on discrimination threshold distance]
In the determination of the material in the floor material detection means 66, when the material to be determined can be assumed, a threshold value is set in advance, and the target material is compared with the luminance value of the detection target on the set image. Can be detected. As an example, a case where three kinds of floor surface materials (floor materials) such as tatami mats, acrylic carpets, and wood flooring are discriminated will be described.

In each material, there is a tendency of equation (1) as luminance difference information obtained by irradiating near-infrared rays with a wavelength of 850 nm and acquired by the imaging means.
Tatami> Carpet (Acrylic)> Wood for flooring (1)
As described above, the luminance difference value acquired by the near infrared rays changes depending on the distance of the target. Therefore, it is desirable that the determination threshold is not a constant value but a function of distance.

(Functionalization of judgment threshold by distance)
Therefore, since the distance from the near-infrared projector 115 to the detection target changes when performing flooring detection, the influence of the distance is reduced and the material is detected more accurately by making the threshold a function of the distance according to the distance. Can be performed. When near-infrared rays are evenly irradiated in the air-conditioned room, the illuminance of the detection target decreases in inverse proportion to the square of the distance from the irradiator, and thus the luminance value acquired by the imaging unit 110 decreases. In accordance with this, the determination threshold is changed. Note that since the distance is estimated from the angle of view of the camera, the determination threshold expression is represented by Expression (2) and Expression (3), which will be described later, taking the pixel coordinate conversion as an example.

(Determining floor material)
FIG. 20 is a diagram illustrating the correction based on the image coordinates of the determination threshold value of the floor surface material. As described above, the determination when determining the material of the flooring will be described. FIG. 20 shows determination thresholds for tatami mats, carpets, and flooring wood with respect to the pixel coordinates of the screen of the imaging unit 110. Here, by comparing the luminance information for each pixel of the near-infrared image after the difference processing acquired by the imaging unit 110 with the determination threshold value of each material, the pixel within the determination threshold value is determined as the floor surface that is the material. It is possible to divide the area of the material of the floor on the image. Here, in the present embodiment, it is possible to determine the material by using the determination threshold equation of the following material equation (2).

[Tolerance ε (θy)] ≧ | [Criteria Criteria Ti (θy)] − [Screen Brightness P (θx, θy)] |
... (2)

  Whether or not the difference between the screen brightness P (θx, θy) acquired by the imaging unit 110 and the criterion criterion Ti (θy) for determining the type of material is within the tolerance ε (θy). Make a decision with. Moreover, since the criterion formula is inversely proportional to the square of the distance, it is shown in Formula (3).

here,
Ai, Bi: Constants for each material (arbitrarily set for each material to be judged)
θx, θy: pixel coordinates on the image L (θy): distance conversion formula of pixel coordinates in the θy direction

  However, the determination threshold value expression of Expression (1) is a determination expression when the indoor unit 100 is installed at a height of 2 m and the near-infrared projector 115 (irradiator) emits uniformly, and the sensitivity of the image sensor The determination threshold value formula may be arbitrarily set according to the installation height / angle of the indoor unit 100, the irradiation range of the irradiator, the irradiation wavelength, and the irradiation intensity.

[(3) Human body / furniture removal processing]
In an actual indoor environment, for example, when detecting flooring, there is a possibility that human bodies, furniture, etc. are reflected and these become disturbances and material detection cannot be performed correctly. When the human body detection unit 63 is provided as in the air conditioner S according to the present embodiment, the human body detected by the human body detection unit 63 or the object (for example, furniture) detected by the human body detection unit 63 when detecting the flooring material. ), The material of the object can be detected more accurately.

  FIG. 21 is a diagram showing a transition of the luminance difference value when an object exists in the room, (a) is a diagram showing an image taken when the object is at the center of the room, and (b) FIG. 4 is a diagram showing transition of luminance values on a detection area. When an object is placed as shown in FIG. 21A, a trend as shown in FIG. 21B appears in the transition of the luminance value depending on the shape of the object. The thing which exists in the horizontal direction like a floor surface changes right-slope falling brightness, but the thing in the vertical direction, such as furniture and a wall surface, changes to the left shoulder or changes horizontally. It is possible to make the specification that can be eliminated, assuming that the one that has risen to the left or moved horizontally is not the floor surface.

  As described above, the air conditioner S according to the present embodiment performs air conditioning operation control by performing human body detection, human body position detection, and flooring detection.

  The carpet has a rough surface shape, high ventilation resistance, and low thermal conductivity. In addition, the carpet has high heat retention. Therefore, the swing width of the wind direction plate is increased, and the control is changed to uniformly warm the carpet area. In addition, since the wind resistance of the carpet is large and it is difficult for the wind to reach when blowing along the floor, setting the wind direction plate slightly higher than the original position makes it easier for the wind to reach the feet of people. By changing the wind direction, it is possible to reliably deliver hot air to people who are away from the indoor unit 100, and to provide air conditioning that is suitable for flooring, so that more comfortable air conditioning can be provided. It is.

  Since the flooring has a higher thermal conductivity than floor materials such as carpets, the heat retaining property is also low, and the sensory temperature is also low. In this case, even if the floor is warmed, the floor immediately cools down. Therefore, the airflow is controlled so that priority is given to locally blowing around the feet and directly warming the human feet. In addition, the temperature of the discharge port is changed to be slightly higher than the setting because the temperature is low, and the rotational speed of the indoor recirculation fan (the blower fan 103) is increased as necessary to improve the comfort on the flooring that is easily cooled. Can be achieved.

  The air conditioner S of the present embodiment detects the floor surface material (floor material) in the air-conditioned room using the sensitivity of the near-infrared region of the imaging means 110 for imaging in the visible light band. It is possible to realize a highly comfortable air-conditioning operation according to the flooring material. Specifically, the floor material can be determined using the near-infrared projector 115 (near-infrared irradiation unit) and the imaging unit 110 provided in the indoor unit 100. In addition, by determining the floor material, the wind direction plate (left and right wind direction plate 104, up and down wind direction plate 105) of the air conditioner S is changed according to the magnitude of the ventilation resistance of the floor surface, depending on the difference in the temperature of sensation due to the material. By controlling the upper and lower discharge port temperatures during heating, it is possible to improve the comfort felt by occupants.

  The air conditioner S of the present embodiment includes a near-infrared irradiation unit that can irradiate a near-infrared ray having a wavelength at which a specific absorption spectrum appears depending on the material, and an imaging unit 110 (light-receiving unit) having a certain sensitivity with respect to the near-infrared ray having the wavelength. And floor material detection means 66 (material detection unit) for detecting the material by estimating the material of the floor surface from the screen brightness on the image information captured when the near infrared ray is irradiated. The air conditioning operation can be changed according to the material.

60 Control Unit 62 Floor Temperature Detection Unit for Each Area 63 Human Body Detection Unit (Human Body Detection Unit)
64 Floor plan detection means 65 Area division means 66 Floor material detection means (material detection part)
67 Floor material discrimination means for each area 68 Floor material temperature judgment means at the position of a person 69 Air conditioning control means 70 Storage means 100 Indoor unit 101 Housing base 102 Heat exchanger 102a Heat transfer tube 103 Blower fan 104 Left and right wind direction plate 105 Vertical wind direction plate 106 Front panel 107 Air inlet 108 Filter 109a Air outlet 109b Air outlet 110 Imaging means (light receiving part)
115 Near-infrared projector 117 Visible light cut filter 116 Filter drive unit 120 Temperature detection unit 131 Floor plan input unit 132 Floor material setting unit 200 Outdoor unit S Air conditioner Re, ReA Remote control (air conditioning control terminal, input unit)

Claims (7)

A material detection unit for detecting the material of the indoor floor surface;
A control unit that controls the air conditioning operation based on the material detected by the material detection unit,
In the heating, when the detected material is the first material, the control unit is configured to compare the first material with the second material having more irregularities on the surface than the first material. An air conditioner characterized by increasing the amount of air blown to the floor surface. A material detection unit for detecting the material of the indoor floor surface;
A control unit that controls the air conditioning operation based on the material detected by the material detection unit,
In the heating, when the detected material is the first material, the control unit is configured to compare the first material with the second material having more irregularities on the surface than the first material. An air conditioner characterized by increasing the target temperature set on the floor of the room. An input unit for inputting the material of the floor surface in the room;
A control unit for controlling the air conditioning operation based on the material detected by the input unit,
In the heating, when the input material is the first material, the control unit is configured to compare the first material with the second material having more unevenness on the surface than the first material. An air conditioner characterized by increasing the amount of air blown to the floor surface. An input unit for inputting the material of the floor surface in the room;
A control unit for controlling the air-conditioning operation based on the material input in the input unit,
In the heating, when the input material is the first material, the control unit is configured to compare the first material with the second material having more unevenness on the surface than the first material. An air conditioner characterized by increasing the target temperature set on the floor of the room. The air conditioner further includes a human body detection unit that detects a human body,
The air conditioner according to any one of claims 1 to 4, wherein the control unit blows air to a floor surface on which a human body detected by the human body detection unit exists. The first material is flooring;
The air conditioner according to any one of claims 1 to 4, wherein the second material is a carpet. The air conditioner
A near-infrared projector that emits near-infrared light into the room;
A light receiving unit that has at least a receiving sensitivity at a wavelength of near infrared rays irradiated from the near infrared projector, and performs output according to light intensity received from the room;
The said material detection part detects the material of a floor surface according to the output of the said light-receiving part acquired when the near-infrared light is irradiated from the said near-infrared light projector. The air conditioner according to any one of 6.