JP2015194283A - Dew condensation detector and dew condensation detection method - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a dew condensation detector capable of accurately detecting the generation of dew condensation indoors with a simple configuration.SOLUTION: A dew condensation detector is provided in an air conditioner 1 and detects indoor dew condensation. The dew condensation detector comprises a first-absolute-humidity measuring unit 21 provided in a first inlet passage 2 of the air conditioner 1 that includes a first inlet 20 disposed at a predetermined position in a part of an indoor space and that draws in first air RA1 from the first inlet 20 as return air, and measuring a first absolute humidity x1 of the first air RA1. The dew condensation detector comprises a supply-absolute-humidity measuring unit 41 provided in a supply passage 4 of the air conditioner 1 that supplies supplied air SA into the indoor space, and measuring a supply absolute humidity x3 of the supplied air SA flowing in the supply passage 4. The dew condensation detector comprises a dew condensation determination unit determining the generation of dew condensation at a predetermined position based on the first absolute humidity x1 and the supply absolute humidity x3.

Description

  The present invention relates to a dew condensation detection device and a dew condensation detection method for detecting dew condensation in a room.

  Conventionally, air-conditioning equipment has been used, but in a room equipped with such air-conditioning equipment, condensation tends to occur when the air-conditioning equipment is operated. If condensation occurs in the room, there is a risk of damage to furniture and houses, and there is also a risk of discomfort and poor hygiene. Therefore, air conditioning equipment that suppresses condensation has been developed (see, for example, Patent Document 1).

  In the air conditioner disclosed in Patent Literature 1 and the like, dew condensation inside the air conditioner is detected.

JP-A-8-105642

  However, in the above-described conventional example, since indoor condensation is not detected, there are many erroneous determinations regarding indoor condensation, and the determination accuracy is low.

  The present invention has been invented in view of the above-described conventional problems, and it is an object of the present invention to provide a dew condensation detection apparatus and a dew condensation detection method capable of accurately detecting the occurrence of dew condensation in a room with a simple configuration.

In order to solve the above problems, the invention according to claim 1
A dew condensation detection device provided in an air conditioner for detecting dew condensation in a room,
A first suction port is disposed at a predetermined position in a room, and is provided in a first suction path of the air conditioner that sucks first air as return air from the first suction port. The absolute humidity of the first air A first absolute humidity measuring unit for measuring
A supply absolute humidity measuring unit that is provided in a supply path of the air conditioner for supplying supply air indoors and that measures the absolute humidity of the supply air flowing through the supply path;
Condensation determination for determining that condensation occurs at the predetermined position based on the first absolute humidity measured by the first absolute humidity measurement unit and the supply absolute humidity measured by the supply absolute humidity measurement unit And
It is characterized by providing.

The invention according to claim 2 is the invention according to claim 1,
The dew condensation determination unit determines that dew condensation has occurred at the predetermined position when the first absolute humidity is lower than the supply absolute humidity by a predetermined value or more.

The invention according to claim 3 is the invention according to claim 1 or 2,
A first temperature measuring unit for measuring the temperature of the return air flowing through the first suction path;
A second temperature measurement unit for measuring the temperature of the supply air flowing through the supply path;
An outside air temperature measurement unit that measures the temperature of outside air flowing through the outside air intake passage of the air conditioning device, and
In the dew condensation determination unit, the first temperature measured by the first temperature measurement unit is lower than the second temperature measured by the second temperature measurement unit by a predetermined value or more, and the first temperature is lower than the outside air temperature. If it is too high, it is not determined that condensation occurs at the predetermined position.

The invention according to claim 4
A dew condensation detection device provided in an air conditioner for detecting dew condensation in a room,
A first suction port is disposed at a predetermined position in a room, and is provided in a first suction path of the air conditioner that sucks first air as return air from the first suction port. The absolute humidity of the first air A first absolute humidity measuring unit for measuring
In addition to the predetermined position in the room, a second suction port is disposed and provided in a second suction path of the air conditioner for sucking second air as return air from the second suction port, and the absolute humidity of the second air is set. A second absolute humidity measuring unit to be measured;
Based on the first absolute humidity measured by the first absolute humidity measuring unit and the second absolute humidity measured by the second absolute humidity measuring unit, it is determined that condensation has occurred at the predetermined position. A dew condensation determination unit;
It is characterized by providing.

The invention according to claim 5 is the invention according to claim 4,
A first temperature measuring unit for measuring the temperature of the return air flowing through the first suction path;
A second temperature measuring unit for measuring the temperature of the return air flowing through the second suction path;
An outside air temperature measurement unit that measures the temperature of outside air flowing through the outside air intake passage of the air conditioning device, and
In the dew condensation determination unit, the first temperature measured by the first temperature measurement unit is lower than the second temperature measured by the second temperature measurement unit by a predetermined value or more, and the first temperature is lower than the outside air temperature. If it is too high, it is not determined that condensation occurs at the predetermined position.

The invention according to claim 6 is the invention according to claim 1,
A dew condensation detection device provided in an air conditioner for detecting dew condensation in a room,
The first suction port is disposed at a predetermined position in a room and is provided in a first suction path of the air conditioner for sucking return air from the first suction port, and the return that flows through the first suction path. A first absolute humidity measuring unit for measuring the absolute humidity of air;
A first temperature measuring unit for measuring the temperature of the return air flowing through the first suction path;
An outside air temperature measuring unit for measuring the temperature of outside air flowing through the outside air intake passage of the air conditioning device;
An outside air absolute humidity measuring unit that measures the absolute humidity of the outside air flowing through the outside air intake passage of the air conditioner; and
Condensation determination for determining that condensation has occurred at the predetermined position based on the first absolute humidity measured by the first absolute humidity measuring unit and the outside absolute humidity measured by the outside air absolute humidity measuring unit And comprising
The dew condensation determination unit obtains a dew point temperature of the first air from the first absolute humidity when the first absolute humidity is higher than the second absolute humidity, and the dew point temperature is lower than the outside air temperature by a predetermined value or more. In addition, when the first temperature is lower than the outside air temperature, it is determined that condensation has occurred at the predetermined position.

The invention according to claim 7
A dew condensation detection method for detecting dew condensation in a room,
A first absolute humidity which is an absolute humidity at a predetermined position in a room;
Based on the second absolute humidity which is the absolute humidity of the air other than the predetermined position in the room,
It is determined whether or not condensation occurs at the predetermined position.

  The invention according to claim 1 of the present invention utilizes the fact that the absolute humidity of the air around the dew condensation part decreases after dew condensation, and the first absolute humidity measurement part, the supply absolute humidity measurement part, It is possible to accurately detect the occurrence of dew condensation in a room with a simple configuration in which a dew condensation determination unit that performs dew condensation determination based on the measured absolute humidity is provided.

  Further, in the invention according to claim 2, it is possible to perform the condensation determination in consideration of a difference generated between the absolute humidity which is originally preferable for comparison with the first absolute humidity and the supply absolute humidity. Become.

  Further, in the invention according to claim 3, the air leakage can be determined by determining whether the first temperature is lower than the second temperature by a predetermined value or more, and whether the first temperature is higher than the outside temperature is determined by whether or not it is winter. I understand. Thereby, when there is air leakage in winter, it is possible to suppress erroneous determination of condensation.

  Moreover, in the invention which concerns on Claim 4, it utilizes that the absolute humidity falls after dew condensation, and it is the absolute humidity measured by these with the 1st absolute humidity measurement part and the 2nd absolute humidity measurement part. Therefore, it is possible to accurately detect the occurrence of dew condensation in the room with a simple configuration in which a dew condensation determination unit that performs dew condensation determination is provided.

  Further, in the invention according to claim 5, air leakage can be found by determining whether the first temperature is lower than the second temperature by a predetermined value or more, and whether it is winter by determining whether the first temperature is higher than the outside air temperature. I understand. Thereby, when there is air leakage in winter, it is possible to suppress erroneous determination of condensation.

  In the invention according to claim 6, it is only necessary to compare the dew point temperature and the outside air temperature, and it is possible to accurately detect the occurrence of dew condensation in the room with a simple configuration.

  In the invention according to claim 7, it is possible to easily detect the occurrence of dew condensation in the room easily by utilizing the fact that the absolute humidity decreases after the dew condensation.

It is a schematic block diagram of the dew condensation detection apparatus of 1st embodiment. It is a flowchart of basic dew condensation determination of a first embodiment. It is a flowchart of the condensation determination of another example in 1st embodiment. It is a schematic block diagram of the dew condensation detection apparatus of 2nd embodiment. It is a schematic block diagram of the dew condensation detection apparatus of 3rd embodiment. It is a flowchart of basic condensation determination of a third embodiment.

  Hereinafter, the dew condensation detection apparatus and dew condensation detection method of the present invention will be described based on the first embodiment shown in FIG. The dew condensation detection device of the first embodiment is provided in the air conditioner 1, and detects dew condensation in the room.

  As shown in FIG. 1, the air conditioner 1 has a ventilation function of taking in the outside air OA and supplying it into the room as supply air SA, and taking in the room air (return air RA) and discharging it to the outside as exhaust EA. The air conditioner 1 may be a device having a circulation function in addition to a ventilation function, or a device having a humidity control function in addition to a ventilation function or a ventilation function and a circulation function (for example, a desiccant system). Furthermore, in addition to the above, the air conditioner 1 may be a refrigeration apparatus or a cooling apparatus (or a heating apparatus or an air conditioning apparatus) that includes a heat pump, or may perform heat exchange without a heat pump.

  As shown in FIG. 1, the air conditioner 1 includes a first suction path 2, a second suction path 3, and a supply path 4.

  The first suction path 2 includes a first suction port 20 that sucks the return air RA at the upstream end, and the downstream end is connected to the air conditioner 1. The first suction port 20 is disposed at a predetermined position in a part of the room. Here, the predetermined position is the vicinity of a place 7 where condensation is likely to occur in the room, such as near a window (mainly a place where it is easy to contact outdoor cold air through a window or a wall, a cold part in the room, etc.). . The first suction path 2 (and the first suction port 20) is not provided with the general air conditioner 1, and is provided to achieve the present invention.

  The air conditioner 1 sucks the absolute humidity (particularly, the first absolute humidity x1) of the return air RA (particularly, the first air RA1) that is sucked from the first suction port 20 and flows through the first suction passage 2. A first absolute humidity measuring unit 21 for measuring is provided. For the measurement of absolute humidity, various means such as one that is directly measured by an infrared sensor and one that is calculated from relative humidity and temperature can be used as appropriate, and are not particularly limited.

  The second suction path 3 includes a second suction port 30 for sucking the return air RA (particularly, the second air RA2) at the upstream end, and the downstream end is connected to the air conditioner 1. The downstream ends of the first suction path 2 and the second suction path 3 may merge. The second suction port 30 is disposed at a location other than a predetermined position in the room, that is, a location where condensation is not particularly likely to occur. This second suction path 3 is provided in a general air conditioner 1.

  The supply path 4 is a flow path for supplying the supply air SA into the room, and includes a discharge port 40 for the room at the downstream end. The air conditioner 1 of the first embodiment has a circulation function, and the first air RA1 and the second air RA2 sucked from the first suction path 2 and the second suction path 3 are heated, cooled, humidified, Processing such as dehumidification is performed, and the supply air SA is supplied from the supply path 4.

  Although not shown, the air conditioner includes a blower and a control unit including a microcomputer or the like. The air blowing means includes a fan and driving means such as a motor for driving the fan, and the drive is controlled by the control unit.

  In the first embodiment, the air conditioner 1 supplies a supply absolute humidity measuring unit 41 that measures the absolute humidity (particularly, the supply absolute humidity x3) of the supply air SA discharged from the discharge port 40 that flows through the supply path 4. Is provided. The supply path 4 and the supply absolute humidity measurement unit 41 are provided in the general air conditioner 1, and the existing supply absolute humidity measurement unit 41 can be suitably used.

  The air conditioner 1 includes a condensation determination unit. The dew condensation determination unit of the first embodiment determines whether or not dew condensation has occurred at a predetermined position based on the first absolute humidity x1 and the supply absolute humidity x3. In the first embodiment, the dew condensation determination unit is provided as a part of the function of the control unit, but may be provided separately from the control unit and is not particularly limited. Hereinafter, determination of condensation will be described with reference to FIG.

  The dew condensation determination unit reads the first absolute humidity x1 and the supply absolute humidity x3, and then (S1) satisfies the condition for decreasing the absolute humidity, that is, the first absolute humidity x1 is greater than the supply absolute humidity x3. It is determined whether it is lower than the value Δx (ie, x1 ≦ x3−Δx). Here, it is not a simple comparison between the first absolute humidity x1 and the supply absolute humidity x3, but it is determined whether the difference is equal to or greater than a predetermined value Δx.

  When condensation occurs at a predetermined position, the absolute humidity of air in the vicinity of the predetermined position (air sucked into the first suction path 2 from the first suction port 20 and becomes the first air RA1) is lowered. At this time, if the absolute humidity (first absolute humidity x1) has decreased after the first air RA1 has dewed, it is determined that dew condensation has occurred because the absolute humidity has decreased due to the occurrence of dew condensation (dew condensation determination and To do). The air before the dew condensation of the first air RA1 is the same as the air other than the predetermined position in the room, that is, the air other than the predetermined position in the room where the dew condensation is not particularly likely to occur. The absolute humidity of this air x0 is preferably set as a comparison target of the first absolute humidity x1 as the absolute humidity of the air before condensation.

  However, in the first embodiment, the supply absolute humidity x3 that can be measured using the existing supply absolute humidity measurement unit 41 is used as the absolute humidity to be compared with the first absolute humidity x1. For this reason, a difference arises between the originally preferable absolute humidity x0 and supply absolute humidity x3. In consideration of this difference, the predetermined value Δx (> 0) is appropriately determined.

  In the first embodiment, the air conditioner 1 has a circulation function, and the return air RA is processed and supplied into the room as the supply air SA from the supply path 4. For this reason, the supply absolute humidity x3 in the first embodiment is considered to be closer to the absolute humidity x0 than the supply absolute humidity x3 in the case of supplying the supply air SA after taking in the outside air OA, and Δx can be small. . In winter, normally, the absolute humidity x0, which is the average humidity of the entire room, is lower than the supply absolute humidity x3, and Δx is appropriately determined according to this situation.

  And a dew condensation determination part performs dew condensation determination in (S2), when the conditions of the fall of the absolute humidity of (S1) are satisfy | filled.

  The flow shown in FIG. 2 is a basic determination procedure in the first embodiment. In the determination of (S1), in the first embodiment, it is determined whether or not x1 ≦ x3−Δx. However, the determination may be performed using another determination formula.

  In addition, the flow (including the flow of FIG. 2 as well as the flow of FIGS. 3 and 6 described later) starts the next flow after a certain period of time after the end, or starts the next flow immediately after the end. Alternatively, a loop may be formed between the start and the end to repeat.

  In the dew condensation detection method using the above dew condensation detection device, it utilizes the fact that the absolute humidity decreases after dew condensation, and it is only necessary to measure the absolute humidity. For this reason, while providing the 1st absolute humidity measurement part 21 and the supply absolute humidity measurement part 41, only providing the condensation determination part which performs a condensation determination based on the 1st absolute humidity measured by these and supply absolute humidity With a simple configuration, it is possible to accurately detect the occurrence of condensation in the room. As a result, it is possible not only to detect internal dew condensation as in the conventional air conditioner 1, but also to accurately detect the occurrence of indoor dew condensation.

  Next, another example of the first embodiment will be described. As shown in FIG. 1, the air conditioner 1 has a ventilation function in addition to a circulation function, and includes an outside air intake path 5 and an exhaust path 6, and further includes a first temperature measurement unit 22, a second temperature measurement unit 22, and a second temperature measurement unit 22. A temperature measuring unit 42 and an outside air temperature measuring unit 51 are provided.

  The first temperature measuring unit 22 measures the temperature (first temperature t1) of the first air RA1 flowing through the first suction passage 2.

  The second temperature measuring unit 42 measures the temperature of the supply air SA flowing through the supply path 4 (second temperature t2).

  The outside air temperature measuring unit 51 measures the temperature of the outside air OA flowing through the outside air intake passage 5 (outside air temperature t3).

  In this other example, as shown in FIG. 3, the dew condensation determination unit determines whether or not the first temperature t1 is higher than the outside air temperature t3 (whether the winter condition is satisfied) in (S11). When the condition is satisfied in (S11), in (S12), it is determined whether or not the first temperature t1 is lower than the second temperature t2 by a predetermined value Δt or more (whether the air leakage condition is satisfied). And when satisfy | filling the conditions of winter in said (S11) and satisfy | filling the air leak conditions of (S12), it does not determine with the dew condensation having generate | occur | produced in the predetermined position.

  The determination as to whether or not the conditions for winter in (S11) are satisfied determines whether or not t1> t3. This determines that it is winter when the first temperature t1 is higher than the outside air temperature t3. That is, in the summer, the possibility of condensation is usually low, so the condensation determination is not made.

  The determination of whether or not the air leakage condition in (S12) is satisfied determines whether or not t1 ≦ t2−Δt. When the first temperature t1 is significantly lower than the second temperature t2, it is assumed that there is an air leak such as opening a window. The predetermined value Δt is a threshold value of the difference between t1 and t2 in this case. Set as appropriate. When the condition for the decrease in absolute humidity in (S1) is satisfied, the condensation determination is normally performed in (S2). When the conditions for winter in (S11) are satisfied and the air leakage condition in (S12) is satisfied, Condensation is not judged as air leakage has occurred. By doing in this way, when there is a leak in the winter season, it is possible to suppress erroneous determination of condensation.

  Next, a second embodiment will be described based on FIG. Note that the second embodiment is mostly the same as the first embodiment shown in FIG. 1, and the same portions are denoted by the same reference numerals, description thereof is omitted, and different portions are mainly described.

  In the first embodiment, based on the supply absolute humidity x3 measured by the supply absolute humidity measurement unit 41 and the first absolute humidity x1 by effectively using the supply absolute humidity measurement unit 41 included in the general air conditioner 1. , Dew condensation judgment was performed. On the other hand, in the second embodiment, the absolute humidity (especially the second air RA2) of the return air RA (particularly the second air RA2) flowing through the second suction passage 3 is used instead of the supply absolute humidity measuring unit 41. A second absolute humidity measuring unit 31 for measuring (2 absolute humidity x2).

  As the absolute humidity to be compared with the first absolute humidity x1, it is preferable to use the absolute humidity x0 of air other than the predetermined position in the room where condensation is not particularly likely to occur, and the second suction port 30 is disposed at a position other than the predetermined position. Therefore, the second air RA2 is air other than the predetermined position, and the second absolute humidity x2 can be regarded as the same as the absolute humidity x0.

  In this case, (S1) First implementation except that the determination as to whether the absolute humidity reduction condition is satisfied is whether the first absolute humidity x1 is lower than the second absolute humidity x2 instead of the supply absolute humidity x3. This is the same as the configuration, and the flow shown in FIGS. 2 and 3 is also the same. In the second embodiment, the determination as to whether the absolute humidity reduction condition of (S1) is satisfied may be a simple comparison between the first absolute humidity x1 and the second absolute humidity x2, and the determination accuracy is also improved.

  Next, 3rd embodiment is described based on FIG. 5, FIG. In addition, a different part from 1st embodiment and 2nd embodiment is demonstrated. As shown in FIG. 5, in the third embodiment, the air conditioner 1 includes an outside air absolute humidity measuring unit 52 in the outside air intake path 5.

  The first embodiment and the second embodiment utilize the fact that absolute humidity decreases before and after condensation. On the other hand, in the third embodiment, the dew condensation determination unit (S21) determines whether the first absolute humidity x1 is higher than the outside absolute humidity x4 measured by the outside air absolute humidity measuring unit 52 (whether the excessive humidity condition is satisfied). ) Determine whether or not. Prior to this, it is determined whether or not the first temperature t1 is higher than the outside air temperature t3 (whether the winter condition is satisfied). If the winter condition is not satisfied, the dew condensation determination is not performed.

  As shown in FIG. 6, when the excessive humidity condition is satisfied in (S21), the dew point temperature t4 of the first air RA1 is obtained from the first absolute humidity x1 in (S22), and the dew point temperature t4 is the outside air temperature in (S23). It is determined whether or not it is lower than t3 by a predetermined value Δt1 or more (whether the condition that there is a possibility of being lower than the dew point is satisfied). When the condition is satisfied in (S23), the condensation determination is not performed.

  In the third embodiment, it is only necessary to compare the dew point temperature t4 and the outside air temperature t3, and it is possible to accurately detect the occurrence of indoor dew condensation with a simple configuration.

DESCRIPTION OF SYMBOLS 1 Air conditioning apparatus 2 1st suction path 20 1st suction port 21 1st absolute humidity measurement part 22 1st temperature measurement part 3 2nd suction path 30 2nd suction port 31 2nd absolute humidity measurement part 4 Supply path 40 Discharge port 41 Supply absolute humidity measuring unit 42 Second temperature measuring unit 5 Outside air intake path 51 Outside air temperature measuring part 52 Outside air absolute humidity measuring part 6 Exhaust path 7 Location where condensation easily occurs EA Exhaust OA Outside air RA Return air RA1 First air RA2 Second Air SA Supply air t1 First temperature t2 Second temperature t3 Outside air temperature t4 Dew point temperature x0 Absolute humidity x1 of air other than the predetermined position x1 First absolute humidity x2 Second absolute humidity x3 Supply absolute humidity x4 Outside air absolute humidity Δx Predetermined value Δt Predetermined Value Δt1 Predetermined value

Claims (7)

A dew condensation detection device provided in an air conditioner for detecting dew condensation in a room,
A first suction port is disposed at a predetermined position in a room, and is provided in a first suction path of the air conditioner that sucks first air as return air from the first suction port. The absolute humidity of the first air A first absolute humidity measuring unit for measuring
A supply absolute humidity measuring unit that is provided in a supply path of the air conditioner for supplying supply air indoors and that measures the absolute humidity of the supply air flowing through the supply path;
Condensation determination for determining that condensation occurs at the predetermined position based on the first absolute humidity measured by the first absolute humidity measurement unit and the supply absolute humidity measured by the supply absolute humidity measurement unit And
A dew condensation detection device comprising:   The dew condensation detection unit according to claim 1, wherein the dew condensation determination unit determines that dew condensation has occurred at the predetermined position when the first absolute humidity is lower than the supply absolute humidity by a predetermined value or more. apparatus. A first temperature measuring unit for measuring the temperature of the return air flowing through the first suction path;
A second temperature measurement unit for measuring the temperature of the supply air flowing through the supply path;
An outside air temperature measurement unit that measures the temperature of outside air flowing through the outside air intake passage of the air conditioning device, and
In the dew condensation determination unit, the first temperature measured by the first temperature measurement unit is lower than the second temperature measured by the second temperature measurement unit by a predetermined value or more, and the first temperature is lower than the outside air temperature. 3, the dew condensation detection device according to claim 1, wherein it is not determined that dew condensation has occurred at the predetermined position. A dew condensation detection device provided in an air conditioner for detecting dew condensation in a room,
A first suction port is disposed at a predetermined position in a room, and is provided in a first suction path of the air conditioner that sucks first air as return air from the first suction port. The absolute humidity of the first air A first absolute humidity measuring unit for measuring
In addition to the predetermined position in the room, a second suction port is disposed and provided in a second suction path of the air conditioner for sucking second air as return air from the second suction port, and the absolute humidity of the second air is set. A second absolute humidity measuring unit to be measured;
Based on the first absolute humidity measured by the first absolute humidity measuring unit and the second absolute humidity measured by the second absolute humidity measuring unit, it is determined that condensation has occurred at the predetermined position. A dew condensation determination unit;
A dew condensation detection device comprising: A first temperature measuring unit for measuring the temperature of the return air flowing through the first suction path;
A second temperature measuring unit for measuring the temperature of the return air flowing through the second suction path;
An outside air temperature measurement unit that measures the temperature of outside air flowing through the outside air intake passage of the air conditioning device, and
In the dew condensation determination unit, the first temperature measured by the first temperature measurement unit is lower than the second temperature measured by the second temperature measurement unit by a predetermined value or more, and the first temperature is lower than the outside air temperature. The condensation detection apparatus according to claim 4, wherein if it is higher, it is not determined that condensation occurs at the predetermined position. A dew condensation detection device provided in an air conditioner for detecting dew condensation in a room,
The first suction port is disposed at a predetermined position in a room and is provided in a first suction path of the air conditioner for sucking return air from the first suction port, and the return that flows through the first suction path. A first absolute humidity measuring unit for measuring the absolute humidity of air;
A first temperature measuring unit for measuring the temperature of the return air flowing through the first suction path;
An outside air temperature measuring unit for measuring the temperature of outside air flowing through the outside air intake passage of the air conditioning device;
An outside air absolute humidity measuring unit that measures the absolute humidity of the outside air flowing through the outside air intake passage of the air conditioner; and
Condensation determination for determining that condensation has occurred at the predetermined position based on the first absolute humidity measured by the first absolute humidity measuring unit and the outside absolute humidity measured by the outside air absolute humidity measuring unit And comprising
The dew condensation determination unit obtains a dew point temperature of the first air from the first absolute humidity when the first absolute humidity is higher than the second absolute humidity, and the dew point temperature is lower than the outside air temperature by a predetermined value or more. And when said 1st temperature is lower than said outside temperature, it determines with the dew condensation having generate | occur | produced in the said predetermined position, The dew condensation detection apparatus characterized by the above-mentioned. A dew condensation detection method for detecting dew condensation in a room,
A first absolute humidity which is an absolute humidity at a predetermined position in a room;
Based on the second absolute humidity which is the absolute humidity of the air other than the predetermined position in the room,
It is determined whether or not condensation occurs at the predetermined position.

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