JP7305652B2 - air conditioner - Google Patents

Description

The present invention relates to an air conditioner that optically detects attachment of a water storage tray.

Humidifiers have trays inside to store the water to be evaporated. The tray must hold a certain amount of water or more in order for the water to evaporate. In a humidifier with a tray that pours water directly, the user has to know the amount of water stored in the tray, and replenish the tray with water when the amount of water stored in the tray becomes less than a predetermined amount. For this reason, various attempts have been made to improve the method of measuring the water level in the tray.

For example, Patent Literature 1 discloses a technique for measuring the water level in a water tank using an optical distance measuring sensor.

Japanese patent publication "JP 2016-99256 (published on May 30, 2016)"

By the way, in a humidifier in which the tray is detachably attached to the housing, the tray can be removed from the housing and carried. This allows the tray to be filled with water directly from the tap. However, such a humidifier cannot release humidified air even if it operates with the tray removed from the housing. Alternatively, when the tray is removed from the housing, water cannot be supplied from the kettle or the like to the main body of the humidifier.

Therefore, it is conceivable to apply the technique of optically measuring the water level to the presence/absence detection of the tray. Specifically, the presence or absence of the tray is detected by reflection of light emitted from a distance measuring sensor arranged above the tray.

When the tray is attached to the lower part of the housing and water is stored in the tray, the distance measuring sensor measures the water level in the tray, so it can be detected that the tray is attached to the housing. However, when the tray is empty, the distance measurement sensor detects the distance measured by receiving the light reflected from the surface to be measured (the bottom surface of the housing or the bottom surface of the tray), and then converts the distance to the preset threshold value. , and the presence or absence of the tray is detected based on the difference with respect to the threshold. Specifically, if the measured distance is longer than the threshold, it is detected that the tray is not attached, and if the measured distance is shorter than the threshold, it is detected that the tray is attached.

However, when the bottom surface of the tray arranged at the bottom of the housing and the bottom surface of the housing are very close to each other, it is difficult to detect the presence or absence of the tray based on the distance with respect to the threshold using the distance measuring sensor. Very difficult. In addition, distance sensors that measure distance by reflecting light are easily affected by the external environment (temperature, humidity, surrounding walls, materials of the surface to be measured, etc.) It is difficult to detect it by distinguishing it from the error.

Therefore, it is conceivable to increase the distance between the bottom surface of the tray and the bottom surface of the housing in order to easily detect whether or not the tray is attached. For example, the above distance can be made longer by forming a recess in the bottom surface of the housing.

However, since the thickness of the bottom of the housing is limited, there is a limit to increasing the above distance by making the recess deeper. Therefore, it is difficult due to the structure of the housing to form a recess deep enough to distinguish the distance from the distance measuring sensor to the bottom surface of the housing from the distance from the distance measuring sensor to the bottom surface of the tray.

An object of one aspect of the present invention is to more accurately detect whether or not a tray is attached.

In order to solve the above problems, an air conditioner according to an aspect of the present invention includes a housing having a first bottom surface; and light emitted from above the first bottom surface toward the first bottom surface and receiving reflected light reflected from the first bottom surface or the second bottom surface of the water storage tray. a ranging sensor that measures a distance to a first bottom surface or the second bottom surface, wherein the first bottom surface has an optical effect that delays the time for the reflected light to reach the ranging sensor. An optical effect section is provided.

According to one aspect of the present invention, it is possible to more accurately detect whether or not a tray is attached.

1 is a perspective view showing an external configuration of a humidifier according to Embodiments 1 to 3 of the present invention; FIG. It is a front view which shows the external appearance structure of the said humidifier. It is an exploded perspective view which shows the internal structure of the said humidifier. FIG. 3 is a cross-sectional view taken along the line AA of FIG. 2; It is a perspective view which shows a part in the structure of the lower part of the said humidifier. It is a block diagram which shows the structure of the control system in the said humidifier.

[Humidifier]
A basic configuration of a humidifier 100 commonly used in Embodiments 1 to 3 of the present invention will be described with reference to FIGS. 1 to 4. FIG.

FIG. 1 is a perspective view showing the external configuration of a humidifier 100 according to Embodiments 1 to 3 of the present invention. FIG. 2 is a front view showing the external configuration of the humidifier 100. As shown in FIG. FIG. 3 is an exploded perspective view showing the internal structure of the humidifier. 4 is a cross-sectional view taken along the line AA of FIG. 2. FIG.

As shown in FIGS. 1 to 4, the humidifier 100 (air conditioner) includes a housing 1, an electrically operated section 2, an upper cover 3, and a water storage tray 4. As shown in FIGS. In the following description, the right side of the housing 1 shown in FIG. 2 is called the right side, and the left side of the housing 1 is called the left side.

In the housing 1, the electrically operated part 2 is arranged on the upper side, and the water storage tray 4 is arranged on the lower side. The housing 1 is formed so as to cover the sides of the electrically operated section 2 and the water storage tray 4 . Further, as shown in FIG. 2, one upper side surface of the housing 1 is provided with an intake port 11 for taking in outside air. As shown in FIG. 4, the air intake 11 is ventilably covered by a grill 12 .

The electrically operated section 2 is a section operated by electricity, and includes a holding frame 21, a sirocco fan 22, a motor (not shown), a heater (not shown), etc., as shown in FIGS. there is

The holding frame 21 has a fan holding portion 23 and an electric component holding portion 24 . The fan holding portion 23 is a portion that rotatably holds the sirocco fan 22 by holding the motor. The electric component holding portion 24 is a portion that holds an electric component such as a heater.

At the upper end of the holding frame 21, a blowout port 211 for blowing out humidified air is provided on the left side, and a water supply port 212 for pouring water to be supplied to the water storage tray 4 is provided on the right side. . A water supply groove 213 is provided on the right side of the holding frame 21 . The water supply groove 213 is formed vertically in a range from the water supply port 212 to the upper end of the water storage tray 4 on the right side. The water supply groove 213 configured in this manner forms a tubular water supply path together with the inner wall on the right side of the housing 1 to guide water from the water supply port 212 to the water storage tray 4 .

As shown in FIG. 3, the bottom of the holding frame 21 is provided with a vent 214 through which the air sent by the sirocco fan 22 is discharged to the water storage tray 4 . Vent 214 is ventilably covered by grill 215 .

As shown in FIG. 1 , the upper cover 3 is arranged in the upper end opening of the housing 1 . The upper cover 3 has a diffuser 31 , a guide plate 32 and an operation/display panel 33 .

The diffuser 31 is provided to diffuse the air blown out from the blowout port 211 of the holding frame 21 . The diffuser 31 is detachably attached to the upper cover 3 .

The guide plate 32 is provided to guide the water poured from above to the water inlet 212 of the holding frame 21 . Therefore, the guide plate 32 is formed so as to be inclined downward toward the water supply port 212 side.

The operation/display panel 33 includes various operation buttons (operating button, etc.) for the user to operate, and lamps (LEDs) for displaying the operation status of the humidifier 100 (operating ON/OFF, timer operation, etc.). contains.

The water storage tray 4 is a tray for storing water supplied through the above-described water supply channel, and is configured to have a large capacity. The water storage tray 4 is provided with a vaporization filter 5 (FIG. 3) for vaporizing the stored water. The water storage tray 4 is detachably attached to the housing 1 and is attached to the housing 1 in the form of a drawer. The water storage tray 4 is provided with a handle 43 for carrying the water storage tray 4 . The handle 43 is rotatably attached to both side walls of the water storage tray 4 .

In the humidifier 100 configured as described above, the air taken in from the air inlet 11 of the housing 1 is heated by the heater and guided to the water storage tray 4 by the force generated by the rotation of the sirocco fan 22 . . In the water storage tray 4, a vaporization filter 5 sucks up the stored water. The air guided to the water storage tray 4 passes through the vaporization filter 5 and is discharged while containing moisture. Since the air blown into the vaporization filter 5 is warmed, the vaporization efficiency of the vaporization filter 5 can be enhanced.

The moisture-containing air that has passed through the vaporization filter 5 passes through a passage (not shown) on the rear side of the sirocco fan 22 , is sent out to the outlet 211 , and is discharged to the outside through the diffuser 31 .

Note that the fan in humidifier 100 is not limited to sirocco fan 22 . As the fan, a turbo fan, a cross flow fan, an axial fan, a mixed flow fan, or the like may be used.

Further, the first to third embodiments described below are applicable not only to the humidifier 100 but also to dehumidifiers, air purifiers having a dehumidification function and/or a humidification function, etc., which are air conditioners. The dehumidifier is equipped with a water storage tray similar to water storage tray 4 for storing the water resulting from the dehumidification.

[Embodiment 1]
The first embodiment of the present invention will be described below with reference to FIGS. 4 and 5. FIG.

FIG. 5 is a perspective view showing part of the lower structure of the humidifier 100. As shown in FIG.

As shown in FIG. 4 , the humidifier 100 has a range sensor 6 .

The distance measuring sensor 6 is an optical distance measuring sensor. to the surface to be measured. A ToF (Time of Flight) range sensor is used as the range sensor 6 .

The ranging sensor 6 is arranged on the bottom of the holding frame 21 . The distance measuring sensor 6 is attached to the bottom of the holding frame 21 with the light emitting part and the light receiving part directed downward so as to irradiate the bottom surface 13 (first bottom surface) of the housing 1 with light directly below. .

On the other hand, on the bottom surface 13 of the housing 1, a recess 14 is formed in a light irradiation area where the light from the distance measuring sensor 6 is irradiated. The recess 14 is formed in a square shape, but the shape is not limited to a square.

At the bottom of the concave portion 14, an inclined surface 14a (optical effect portion) is formed which is inclined with respect to the incident direction of the light from the distance measuring sensor 6 so as not to reflect the incident light toward the distance measuring sensor 6. It is The inclined surface 14a produces an optical effect of delaying the time for the light reflected by the inclined surface 14a to reach the distance measuring sensor 6, as will be described later.

Next, the control system of humidifier 100 will be described. FIG. 6 is a block diagram showing the configuration of the control system.

As shown in FIG. 6, the humidifier 100 includes, as a control system, a storage unit 7, a notification unit 8, and a control unit 9 (tray attachment determination unit) in addition to the distance measurement sensor 6 described above.

The storage unit 7 stores predetermined threshold values for determining the distance to the bottom surface 13 of the housing 1 and the distance to the bottom surface 44 (second bottom surface) of the water storage tray 4 .

The notification unit 8 is provided to notify that the water storage tray 4 is not attached to the housing 1 . For example, when the water storage tray 4 is not attached to the housing 1 , the notification unit 8 lights a non-attachment lamp provided for notification on the operation/display panel 33 .

The control unit 9 compares the measured distance, which is the distance to the measurement target surface (bottom surface 13 or bottom surface 44) measured by the distance measuring sensor 6, with the threshold value stored in the storage unit 7. FIG. As a result of the comparison, the controller 9 determines whether or not the water storage tray 4 is present in the housing 1 based on the length of the measured distance with respect to the threshold. Specifically, the controller 9 determines that the water storage tray 4 is not attached to the housing 1 when the measured distance is longer than the threshold, and the water storage tray 4 is attached to the housing when the measured distance is shorter than the threshold. It is determined that it is installed. Here, it is assumed that the water storage tray 4 is in an empty state without storing water.

Next, the operation of determining whether the water storage tray 4 is attached to the housing 1 or not by the humidifier 100 configured as described above will be described.

When the user is using the humidifier 100 and the water storage tray 4 is not attached to the housing 1, the inclined surface 14a of the concave portion 14 in the bottom surface 13 is the surface to be measured. In this case, first, the light emitted from the distance measuring sensor 6 is applied to the inclined surface 14a. The light is reflected in an oblique direction different from the incident direction by the inclined surface 14 a and reaches the range sensor 6 after being reflected by the inner wall of the water storage tray 4 and the like. The distance measuring sensor 6 receives the reflected light from the inclined surface 14a, calculates and outputs the measured distance.

Therefore, the time from when the distance measuring sensor 6 emits light to when it receives the reflected light is longer than the time when the reflected light directly returns to the distance measuring sensor 6 . Therefore, since the concave portion 14 has the inclined surface 14a, the measured distance is longer than the actual distance between the distance measuring sensor 6 and the inclined surface 14a.

The control unit 9 compares the measured distance with thresholds stored in the storage unit 7 . In this case, the controller 9 determines that the measured distance is longer than the threshold value, and thus determines that the water storage tray 4 is not attached to the housing 1 . Based on this determination, the control unit 9 instructs the notification unit 8 to notify that the water storage tray 4 is not attached. Upon receiving this instruction, the notification unit 8 lights the non-mounting lamp on the operation/display panel 33 . This allows the user to recognize that the water storage tray 4 is not attached.

When the user is using the humidifier 100 and the water storage tray 4 is attached to the housing 1, the bottom surface 44 of the water storage tray 4 is the surface to be measured. In this case, the emitted light from the distance measuring sensor 6 returns directly to the distance measuring sensor 6 after being reflected by the bottom surface 44 which is a horizontal surface. The distance measurement sensor 6 receives the reflected light from the bottom surface 44 and calculates and outputs the measured distance.

The controller 9 compares the measured distance with a threshold. In this case, the controller 9 determines that the water storage tray 4 is attached to the housing 1 because the measured distance is shorter than the threshold. Based on this determination, the control unit 9 does not give an instruction to the notification unit 8 to notify that the water storage tray 4 is not attached. Therefore, the notification unit 8 does not turn on the non-mounting lamp on the operation/display panel 33 . Thereby, the user recognizes that the humidifier 100 is in a normal use state with the water storage tray 4 attached.

As described above, the humidifier 100 according to the present embodiment has the concave portion 14 having the inclined surface 14a inclined with respect to the incident direction of the light from the distance measuring sensor 6 on the bottom surface 13 of the housing 1. . When the light emitted from the distance measuring sensor 6 is applied to the inclined surface 14a, the reflected light from the inclined surface 14a reaches the distance measuring sensor 6 later than the reflected light from the flat surface, as described above.

As a result, the distance measured by the distance measuring sensor 6 becomes longer than the actual distance between the distance measuring sensor 6 and the inclined surface 14a. Therefore, it is possible to obtain a measurement distance equivalent to that obtained by measuring the distance between the bottom of the recess 14 formed deeper and the distance measuring sensor 6 . Therefore, even if there is a limit to the depth of the concave portion 14 due to the structure of the housing 1, by making the measured distance between the range sensor 6 and the inclined surface 14a longer than the actual distance, the measured distance and the measured distance can be reduced. The difference between the distance measured by the distance sensor 6 and the bottom surface 44 can be increased. Therefore, it is possible to more accurately determine whether the water storage tray 4 is attached or not while suppressing an increase in the size of the humidifier 100 such that the bottom portion of the housing 1 is formed thick.

In addition, in this embodiment, the distance measuring sensor 6 is used for determining whether the water storage tray 4 is attached or not. However, the distance measuring sensor 6 provided for detecting the level of water stored in the water storage tray 4 may also be used to determine whether the water storage tray 4 is attached or not. In this configuration, the control unit 9 can determine that the water storage tray 4 is attached to the housing 1 because the measured distance between the range sensor 6 and the water surface in the water storage tray 4 is shorter than the threshold.

A specific example will now be described. It should be noted that the distance values given below are merely examples and do not limit the present invention.

Assuming that the distance between the distance measuring sensor 6 and the bottom surface 44 of the water storage tray 4 is 20 cm, the distance measured by the ToF sensor constituting the distance measuring sensor 6 has an error of ±0.5 cm in the measurement of the distance of 20 cm. there is a possibility. Therefore, the measurement distance measured by the round-trip time of light includes an error of about 1 cm, which is twice the above error. Also, the distance between the bottom surface 13 of the housing 1 and the bottom surface 44 of the water storage tray 4 is approximately 1.3 cm. Therefore, the difference between this distance and the above error is small.

If the above error increases due to the effects of temperature, slight scratches on the bottom surfaces 13 and 44, vibrations, etc., there is a risk that the range sensor 6 will not be able to distinguish the small difference in distance between the bottom surfaces 13 and 44. FIG. Even if a shallow concave portion is provided in the bottom surface 13, there is a high possibility that the above distance difference cannot be distinguished similarly.

On the other hand, in the above configuration according to the present embodiment, the distance to the inclined surface 14a is measured longer than the actual distance, so the distance difference can be increased. Thus, even if the concave portion 14 is not sufficiently deep, it is possible to determine whether the water storage tray 4 is attached to the housing 1 or not without being affected by the error of the distance measuring sensor 6 . Moreover, since the distance difference is increased, it is possible to easily set the threshold value.

[Embodiment 2]
The second embodiment of the present invention will be described below with reference to FIGS. 4 and 5. FIG. For convenience of explanation, constituent elements having functions equivalent to those of the constituent elements explained in the first embodiment are denoted by the same reference numerals, and the explanation thereof is omitted. Also, in this embodiment, portions different from the first embodiment will be described.

Unillustrated unevenness (optical effect portion) is formed on the inclined surface 14a of the concave portion 14 shown in FIGS. As the shape of the unevenness, a shape such as a texture can be used, but the shape is not limited to a specific shape.

By forming unevenness on the inclined surface 14a, light is reflected in a direction different from the incident direction by the unevenness. Therefore, the time for the reflected light to reach the distance measuring sensor 6 can be further delayed. Therefore, the presence/absence of the water storage tray 4 can be detected with higher accuracy.

In addition, in the configuration in which a concave portion having a flat surface is provided on the bottom surface 13 instead of the concave portion 14 having the inclined surface 14a, unevenness may be formed on the flat surface. Even in such a configuration, the reflected light does not directly reach the distance measuring sensor 6, so the measurement distance can be increased. Therefore, the presence or absence of the water storage tray 4 can be detected without being affected by the error of the distance measuring sensor 6 .

[Embodiment 3]
The third embodiment of the present invention will be described below with reference to FIGS. 4 and 5. FIG. For convenience of explanation, constituent elements having functions equivalent to those of the constituent elements explained in the first embodiment are denoted by the same reference numerals, and the explanation thereof is omitted. Also, in this embodiment, portions different from the first embodiment will be described.

The inclined surface 14a of the concave portion 14 shown in FIGS. 4 and 5 is colored with high light absorption. As the color applied to the inclined surface 14a, a color having a high absorptance with respect to the wavelength of the light emitted by the distance measuring sensor 6 is selected. For example, since black exhibits substantially the same absorption rate regardless of the wavelength of light, it is preferable as a color to be applied to the inclined surface 14a from the viewpoint of not being affected by the wavelength of light. As for the color applied to the inclined surface 14a, a dark color is preferable, and black is more preferable, from the viewpoint that the inclined surface 14a is less likely to reflect light.

However, when the color of the housing 1 and the color of the water storage tray 4 are bright colors, the color applied to the inclined surface 14a is preferably a color different from these colors.

Since the inclined surface 14a is a colored portion (optically effective portion) with a highly light-absorbing color, the amount of reflected light that travels straight on the inclined surface 14a is reduced, resulting in a large proportion of diffusely reflected light. Become. As a result, the time for the reflected light to reach the distance measuring sensor 6 can be further delayed. Therefore, the presence/absence of the water storage tray 4 can be detected with higher accuracy.

In addition, in the configuration in which a concave portion having a flat surface is provided on the bottom surface 13 instead of the concave portion 14 having the inclined surface 14a, the flat surface may be colored as described above. Even in such a configuration, since the proportion of the reflected light that directly reaches the distance measuring sensor 6 is small, the distance measuring sensor 6 cannot detect the reflected light, and detects diffusely reflected light. Therefore, the measurement distance can be lengthened. Therefore, the presence/absence of the water storage tray 4 can be detected without being affected by the error of the distance measuring sensor 6 .

Note that the configuration of this embodiment may be applied to the configuration of the second embodiment described above.

〔summary〕
An air conditioner according to aspect 1 of the present invention includes a housing 1 having a first bottom surface (bottom surface 13), and is disposed on the first bottom surface so as to be detachable from the housing 1, and stores water. Light directly emitted from above the water storage tray 4 and the first bottom surface toward the first bottom surface receives reflected light reflected from the first bottom surface or the second bottom surface (bottom surface 44) of the water storage tray 4. and a distance measuring sensor 6 for measuring the distance to the first bottom surface or the second bottom surface, and the first bottom surface includes an optical element that delays the time for the reflected light to reach the distance measuring sensor 6 An optical effect section is provided for producing an optical effect.

According to the above configuration, the reflected light from the first bottom surface reaches the distance measuring sensor with a delay than usual due to the influence of the optical effect. As a result, the measured value (measured distance) of the distance to the first bottom surface becomes longer than the actual distance. Therefore, it is possible to obtain a measurement distance equivalent to the measurement distance to the recess when the recess is deeply formed in the first bottom surface in order to lengthen the measurement distance. Therefore, even if there is a limit to the depth of the recess that can be formed on the bottom surface due to the structure of the housing, the difference between the measured distance to the first bottom surface and the measured distance to the second bottom surface becomes greater. Therefore, it is possible to determine whether the water storage tray is attached or not without being affected by the measurement error of the distance measuring sensor.

Therefore, it is possible to more reliably determine whether the water storage tray is attached or not, while suppressing an increase in the size of the housing.

The air conditioner according to aspect 2 of the present invention is the air conditioner according to aspect 1, wherein the optical effect portion is a recess 14 formed in a light irradiation area irradiated with light on the first bottom surface, and the recess 14 is , it may have an inclined surface 14a at its bottom which is inclined with respect to the incident direction of light.

According to the above configuration, light incident on the inclined surface is reflected in an oblique direction different from the direction of incidence, and reaches the distance sensor after being reflected by the inner wall of the water storage tray and the like. This makes it possible to delay the time for the reflected light to reach the distance measuring sensor.

In the air conditioner according to aspect 3 of the present invention, in the above aspect 1 or 2, the optical effect portion may be unevenness formed in a light irradiation region of the first bottom surface where light is irradiated.

According to the above configuration, light incident on the inclined surface is reflected in an oblique direction different from the direction of incidence, and reaches the distance sensor after being reflected by the inner wall of the water storage tray and the like. This makes it possible to delay the time for the reflected light to reach the distance measuring sensor.

The air conditioner according to aspect 4 of the present invention is the air conditioner according to any one of aspects 1 to 3, wherein the optical effect portion has a light-irradiating region on the first bottom surface that is irradiated with light and has a highly light-absorbing color. It may be a colored portion attached.

According to the above configuration, when light is incident on the colored portion, most of it is absorbed by the colored portion. Therefore, the amount of reflected light that travels straight is reduced, thereby increasing the proportion of diffusely reflected light. This makes it possible to further delay the time for the reflected light to reach the distance measuring sensor.

In the air conditioner according to aspect 5 of the present invention, in any one of aspects 1 to 4, the distance to the measurement target surface including the first bottom surface and the second bottom surface measured by the distance measuring sensor 6 and a predetermined threshold value, and when the distance is longer than the threshold value, it is determined that the water storage tray 4 is not attached to the housing 1, and when the distance is shorter than the threshold value, the water storage tray is determined. A tray mounting determination unit (control unit 9) for determining that the tray 4 is mounted on the housing 1 may be further provided.

According to the above configuration, when light is incident on the colored portion, most of it is absorbed by the colored portion. Therefore, the amount of reflected light that travels straight is reduced, thereby increasing the proportion of diffusely reflected light. This makes it possible to further delay the time for the reflected light to reach the distance measuring sensor.

[Additional notes]
The present invention is not limited to the above-described embodiments, but can be modified in various ways within the scope of the claims, and can be obtained by appropriately combining technical means disclosed in different embodiments. is also included in the technical scope of the present invention. Furthermore, new technical features can be formed by combining the technical means disclosed in each embodiment.

1 housing 4 water storage tray 6 range sensor 13 bottom (first bottom, surface to be measured)
14 concave portion 14a inclined surface (optical effect portion, colored portion)
44 bottom surface (second bottom surface, surface to be measured)
100 humidifier (air conditioner)

Claims (5)

a housing having a first bottom surface;
a water storage tray that is arranged on the first bottom surface so as to be detachable from the housing and stores water;
Light emitted directly downward from above the first bottom surface toward the first bottom surface receives reflected light reflected from the first bottom surface or the second bottom surface of the water storage tray. and a distance sensor that measures the distance to the bottom surface,
The air conditioner according to claim 1, wherein the first bottom surface is provided with an optical effect section that produces an optical effect of delaying the time for the reflected light to reach the distance measuring sensor. The optical effect portion is a concave portion formed in a light irradiation area irradiated with light on the first bottom surface,
2. The air conditioner according to claim 1, wherein the recess has an inclined surface at its bottom that is inclined with respect to the incident direction of light. 3. The air conditioner according to claim 1, wherein the optically effective portion is unevenness formed in a light-irradiated region of the first bottom surface. 4. The optically effective portion is a colored portion in which a light-irradiated region on the first bottom surface is colored with a color having a high light absorption property. The air conditioner described in . The distance to the surface to be measured including the first bottom surface and the second bottom surface measured by the range sensor is compared with a predetermined threshold, and when the distance is longer than the threshold, the water storage tray is It further comprises a tray attachment determination unit that determines that the water storage tray is attached to the housing when the distance is shorter than the threshold while determining that the water storage tray is not attached to the housing. The air conditioner according to any one of claims 1 to 4.

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