KR102538819B1 - Large capacity thermo-hygrostat with air purification and dew point controlling function - Google Patents

Abstract

The present invention has an installation space formed therein, and a housing whose interior is partitioned into an upper space and a lower space; a heat exchange unit installed in the lower space of the housing to correspond to the inlet formed on one side of the lower space to cool the incoming outside air; a heating unit spaced apart from the upper side of the heat exchanging unit and heating the mixed air after the outdoor air introduced from the outdoor air motor damper installed on the other side of the suction port and the air heat-exchanged from the heat exchanging unit are mixed with each other; Installed on the lower side of the outdoor air damper to introduce outside air, flow into the upper part of the heating unit, and mix again with the mixed air that has passed through the heat exchange unit and the heating unit at the upper side spaced apart from the heating unit. damper; a blower installed in the upper space and discharging heated or cooled outside air toward a discharge port formed on one side of the upper space; A water tank is installed and fixed in the lower space, and the injection unit is installed upward in the direction of the blower in the compartment position, which is the space between the upper and lower spaces of the housing, and is operated before the blower is driven, so that outside air is discharged to the outside through the blower. Humidifying unit for controlling the humidity of; a sterilization unit provided above the heating unit in the lower space and sterilizing harmful substances in supplied air by adjusting the dew point temperature; The dew point temperature of the room in which the housing is installed is measured, and if the room in which the housing is installed is below the dew point temperature, the outdoor air electric damper or the outdoor air second electric damper for controlling the dew point temperature is selectively opened to introduce additional outdoor air, thereby forming dew in the installation space. a control unit to prevent this; The sterilization unit is inserted and mounted inside a tubular body having a plurality of air permeation holes, and includes an ultraviolet lamp that emits light by the control unit and sterilizes air; The outside air second electric damper is by the blower, without passing through the heat exchange unit. Separately from the outdoor air damper for controlling the dew point temperature to supply additional outdoor air to the middle of the heating unit, to supply additional outdoor air to the upper side of the heating unit without passing through the heat exchange unit and the heating unit; It relates to a large-capacity constant temperature and humidity device having air purification and dew point temperature control functions.
It has an air purifying function, adds a sterilizing function to the air supplied to the room, and at the same time, a humidifying device is installed inside, and has an effect of enabling humidification to be operated only at a discharge port at a certain position in a large-capacity device.
In addition, the dew point temperature of the installation space is always checked, and the two outdoor electric motors are selectively opened and closed to automatically sterilize, purify, and supply air to prevent dew from forming inside the installation space. there is

Description

Large capacity thermo-hygrostat with air purification and dew point controlling function}

The present invention relates to a large-capacity constant temperature and humidity device having air purification and dew point temperature control functions.

It is necessary to precisely control the temperature and humidity of various laboratories, storage rooms, precision control devices, server devices, and precision product production facilities as well as the space where people live. The reason for this is that various residents, animals and plants, and objects in the living space are affected by the change in temperature.

In addition, the effect of relative humidity along with temperature is also significant. In other words, the effect of temperature and humidity on indoor residents and various articles and animals and plants stored there is to ensure the comfort of residents' lives, and in the case of storage rooms, it has a great influence on the deterioration of stored articles. In particular, innumerable things such as expensive paintings and calligraphic materials, books, semiconductors, experimental equipment, and ultra-precise control devices are set to act as factors of fatal change depending on temperature and humidity.

In this regard, the present inventor developed an air conditioning system that controls air conditioning and heating in the room, and while proceeding with manufacturing and installation, in view of the fact that the humidity in the room has a serious effect along with the temperature, the inventor developed an air conditioning device capable of controlling humidity. . In particular, in order to prevent changes in stored materials, an air-conditioning and heating system with a dehumidifying function that controls humidity was developed. Among them, in order to use the waste heat generated in the condenser that compresses the refrigerant for dehumidification, a part of the refrigerant is recycled to the room and the refrigerant is condensed by the auxiliary heat exchanger, and the humidity of the indoor air is removed by the heat generated during condensation.

By reusing the condensation heat of the refrigerant for dehumidification, a huge energy saving effect was obtained. However, in addition to dehumidification, the need for humidification has also emerged for ultra-precise humidity and temperature control. Dehumidification is important for constant temperature and humidity, but conversely, humidification must also operate together to achieve the desired constant temperature and humidity.

The development of a large-capacity constant temperature and humidity device that also serves as a constant temperature and humidity function and a purification function of air supplied to the room is urgently emerging.

Republic of Korea Patent Registration No. 10-0427865 (2004.04.08. registration)

The present invention has been made to solve the above problems, and an object of the present invention is to have an air purification function, to add a sterilization function to the air supplied to the room, and at the same time to drive two outdoor air dampers, It relates to a large-capacity constant temperature and humidity device that selectively introduces outside air to control the temperature and humidity in the installation space. Rather, it is a large-capacity constant temperature and humidity device having a function of continuously measuring the dew point temperature in the installation space and automatically introducing fresh outdoor air from the outside so that dew does not form in the installation space.

Other objects and advantages of the present invention will be described below, and will be learned by way of examples of the present invention. Furthermore, the objects and advantages of the present invention may be realized by means of the instrumentalities and combinations indicated in the claims.

The present invention is a means for solving the above problems, the present invention is formed in the installation space inside the housing, the interior of which is partitioned into an upper space and a lower space; a heat exchange unit installed in the lower space of the housing to correspond to the inlet formed on one side of the lower space to cool the incoming outside air; a heating unit spaced apart from the upper side of the heat exchanging unit and heating the mixed air after the outdoor air introduced from the outdoor air motor damper installed on the other side of the suction port and the air heat-exchanged from the heat exchanging unit are mixed with each other; Installed on the lower side of the outdoor air damper to introduce outside air, flow into the upper part of the heating unit, and mix again with the mixed air that has passed through the heat exchange unit and the heating unit at the upper side spaced apart from the heating unit. damper; a blower installed in the upper space and discharging heated or cooled outside air toward a discharge port formed on one side of the upper space; A water tank is installed and fixed in the lower space, and the injection unit is installed upward in the direction of the blower in the compartment position, which is the space between the upper and lower spaces of the housing, and is operated before the blower is driven, so that outside air is discharged to the outside through the blower. Humidifying unit for controlling the humidity of; a sterilization unit provided above the heating unit in the lower space and sterilizing harmful substances in supplied air by adjusting the dew point temperature; The dew point temperature of the room in which the housing is installed is measured, and if the room in which the housing is installed is below the dew point temperature, the outdoor air electric damper or the outdoor air second electric damper for controlling the dew point temperature is selectively opened to introduce additional outdoor air, thereby forming dew in the installation space. a control unit to prevent this; The sterilization unit is inserted and mounted inside a tubular body having a plurality of air permeation holes, and includes an ultraviolet lamp that emits light by the control unit and sterilizes air; The outside air second electric damper is by the blower, without passing through the heat exchange unit. Separately from the outdoor air damper for controlling the dew point temperature to supply additional outdoor air to the middle of the heating unit, to supply additional outdoor air to the upper side of the heating unit without passing through the heat exchange unit and the heating unit; It is to provide a large-capacity constant temperature and humidity device having air purification and dew point temperature control functions.

As described above, the present invention has an air purifying function, adds a sterilizing function to the air supplied to the room, and at the same time, a humidifying device is installed inside, and the humidifying operation is performed only at the discharge port at a certain position in the large-capacity device. It has the effect of making it happen.

In addition, the dew point temperature of the installation space of the device of the present invention is always checked, and the two outdoor electric motors are selectively opened and closed, thereby automatically sterilizing and purifying the air so that dew does not form inside the installation space, It has the effect of supplying internally.

1 is a side view of an embodiment showing a large-capacity constant temperature and humidity device having an air purifying function according to the present invention and using an outdoor electric damper.
2 is a side view of an embodiment showing a large-capacity constant temperature and humidity device having an air purification function according to the present invention and using a second electric damper for outdoor air.
Figure 3 is a front view of Figure 1;
4 is a view of an embodiment showing an air sterilization function according to the present invention.
5 is a view of an embodiment showing a humidifier according to the present invention.

Before describing various embodiments of the present invention in detail, it will be appreciated that the application is not limited to the details of the configuration and arrangement of components described in the following detailed description or shown in the drawings. The invention is capable of being implemented and practiced in other embodiments and of being carried out in various ways. Also, device or element orientation (e.g., "front", "back", "up", "down", "top", "bottom") The expressions and predicates used herein with respect to terms such as ", "left", "right", "lateral", etc. are only used to simplify the description of the present invention and related devices. Or it will be appreciated that it does not indicate or imply that an element simply must have a particular orientation. Also, terms such as “first” and “second” are used herein and in the appended claims for descriptive purposes and are not intended to indicate or imply relative significance or significance.

The present invention has the following features to achieve the above object.

Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings. Prior to this, the terms or words used in this specification and claims should not be construed as being limited to the usual or dictionary meaning, and the inventor appropriately uses the concept of the term in order to explain his/her invention in the best way. It should be interpreted as a meaning and concept consistent with the technical idea of the present invention based on the principle that it can be defined.

Therefore, since the embodiments described in this specification and the configurations shown in the drawings are only one of the most preferred embodiments of the present invention and do not represent all of the technical ideas of the present invention, various alternatives may be used at the time of this application. It should be understood that there may be equivalents and variations.

the present invention

A housing 10 in which an installation space is formed and the interior is partitioned into an upper space 11 and a lower space 12;

A heat exchange unit 20 installed in the lower space 12 of the housing 10 to correspond to the inlet 14 formed on one side of the lower space 12 to cool the incoming outside air;

After being spaced apart from the upper side of the heat exchange unit 20 and flowing in from the outside air electric damper 60 installed on the other side of the inlet 14, the air exchanged with heat from the heat exchange unit 20 is mixed with each other, Heating unit 30 for heating the mixed air;

It is installed on the lower side of the outdoor air electric damper 60 to introduce outside air, and is introduced into the upper portion of the heating unit 30 to heat the heat exchange unit 20 and the upper side spaced apart from the heating unit 30. A second outdoor air damper 65 formed to be mixed again with the mixed air passing through the unit 30;

a blower 40 installed in the upper space 11 to discharge heated or cooled outside air toward the outlet 15 formed on one side of the upper space 11;

The water tank 51 is installed and fixed in the lower space 12, and the spraying part 55 is a blowing part in the compartment position 13, which is the space between the upper and lower spaces 11 and 12 of the housing 10. (40) a humidifying unit (50) installed upward in the direction and operating before driving the blowing unit (40) to adjust the humidity of the outside air discharged through the blowing unit (40);

a sterilization unit (80) provided above the heating unit (30) of the lower space (12) and sterilizing harmful substances in supplied air by adjusting the dew point temperature;

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The dew point temperature of the room where the housing 10 is installed is measured, and if the room where the housing 10 is installed is below the dew point temperature, the outdoor air motorized damper 60 or the outdoor air second motorized damper 65 for adjusting the dew point temperature is selectively opened. a controller 70 to prevent dew formation in the installation space by introducing additional outside air;

The sterilization unit 80 is inserted and mounted inside the tube body 81 having a plurality of air permeation holes, and includes an ultraviolet lamp 82 that emits light by the control unit 70 and sterilizes air;
The outside air second electric damper 65 is by the blower 40, without passing through the heat exchange unit 20. Apart from the outdoor air motor damper 60 for controlling the dew point temperature for supplying additional outdoor air to the middle of the heating unit 30, the upper side of the heating unit 30 does not pass through the heat exchange unit 20 and the heating unit 30. to supply additional outdoor air; It relates to a large-capacity constant temperature and humidity device having air purification and dew point temperature control functions.

In addition, the humidifying unit 50

a water tank 51 in which water is stored;

a humidifying hose 52 connected to the water tank 51 and installed upright in the lower space 12;

a connecting pipe 53 connected to the upper end of the humidifying hose 52, having a curved portion formed at the middle, and capable of bending;

At the end of the connection pipe 53, it is horizontally installed in the compartment position 13 in a form perpendicular to the connection pipe 53, and a plurality of nozzles are installed so that steam can be sprayed toward the upper space 11 over a wide area. a spraying portion 55 in which 54 is formed;

a warming part 56 that serves to keep warm by wrapping around the outer periphery of the connecting pipe 53 and the spraying part 55;

It is made including.

In addition, the injection unit 55

Of the entire space of the discharge port 15 of the housing 10,

So that the humidified air (B) can be exclusively discharged only at the preset location,

A large-capacity constant temperature and humidity device for controlling the dew point temperature by two electric dampers, characterized in that they are installed on one side or the other side of the compartment position (13).

In addition, the controller 70

It is installed inside or outside the housing 10,

It receives a measurement signal from the dew point temperature measuring sensor 71 installed in the installation space and controls whether the outdoor air electric damper 60 or the outdoor air second electric damper 65 for adjusting the dew point temperature is driven. .

Hereinafter, a large-capacity constant temperature and humidity device according to a preferred embodiment of the present invention will be described in detail with reference to FIGS. 1 to 5 .

A large-capacity constant temperature and humidity device according to the present invention includes a housing, a heat exchanging part 20, a heating part 30, a blowing part 40, a humidifying part 50, an outdoor air electric damper for dew point temperature control (60), and a second outdoor air electric damper (65), and a control unit 70.

The housing 10 is a large-capacity enclosure in which an installation space is formed and the interior is divided into an upper space 11 and a lower space 12.

In this housing 10, a suction port 14 for introducing indoor air into the installation space is formed horizontally at the lower end of one side (front facing the installation space) of the lower space 12, and at the upper end of one side of the upper space 11. A horizontal discharge port 15 is formed. As a result, the indoor air flowing into the intake port 14 is heated, cooled, or humidified inside the housing 10 through the heat exchange unit 20, the heating unit 30, and the humidifier 50, which will be described later, so that the discharge port It is supplied indoors through (15).

The heat exchange unit 20 is installed in the lower space 12 of the housing 10 described above to correspond to the inlet 14 formed on one side of the lower space 12, and serves to cool the incoming outside air, This is the role of the evaporator, and the heat exchanger installed inside the heat exchange unit 20 is a well-known technology.

The heating unit 30 is installed spaced apart from the upper side of the heat exchange unit 20, and heat is exchanged from the heat exchange unit 20 with outside air introduced from the outside air electric damper 60 installed on the other side of the inlet 14. After the air is mixed with each other, it is responsible for heating the mixed air.

In addition, a second outdoor air motorized damper 65 is separately provided and installed on the lower side of the outdoor air motorized damper 60 to introduce outdoor air into the upper part of the heating unit 30, so that the heating unit 30 ) It is responsible for the function of forming to be mixed again with the mixed air that has passed through the heat exchange unit 20 and the heating unit 30 at the upper side spaced apart from ).

The blower 40 is installed in the above-described upper space 11 of the housing 10 and serves to discharge heated or cooled outside air toward the outlet 15 formed on one side of the upper space 11, Indoor air is sucked in through the inlet 14 by the blower 40. Outside air is sucked in by the outside air electric damper 60 and the outside air second electric damper 65 installed on the other side of the suction port 14 .
If this is correct, the outside air second electric damper 65 is by the blower 40, without passing through the heat exchange unit 20. Apart from the outdoor air motor damper 60 for controlling the dew point temperature for supplying additional outdoor air to the middle of the heating unit 30, the upper side of the heating unit 30 does not pass through the heat exchange unit 20 and the heating unit 30. to supply additional outdoor air.

As shown in Figure 1,

By the outside air electric damper 60, without passing through the heat exchange unit 20. It is responsible for supplying additional outdoor air to the middle of the heating unit 30 and controlling the indoor dew point temperature.

As shown in Figure 2,

A function of controlling the indoor dew point temperature by supplying additional outdoor air to the upper side of the heating unit 30 without passing through the heat exchange unit 20 and the heating unit 30 by the second outdoor air damper 65 is responsible for the function responsible for

In addition, in the humidifier 50, the water tank 51 is installed and fixed in the lower space 12, and the spraying part 55 is a space between the upper and lower spaces 11 and 12 of the housing 10 It is installed upward in the direction of the blower 40 at the compartment position 13, and serves to control the humidity of the outside air discharged to the outside through the blower 40.

Of course, the humidifying unit 50 is operated first before the blowing unit 40 operates and sprays water vapor into the space where the blowing unit 40 sucks in air, so that the blowing unit 40 and the humidifying unit 50 can simultaneously It is operated so that water is not sprayed into the room as it is.

The humidifying unit 50 for this purpose is a water tank 51 in which water to be used for humidification is stored, and a humidifying hose 52, which is a poly heat-resistant hose connected to the water tank 51 and installed upright in the lower space 12 ), connected to the upper end of the humidifying hose 52, a bent portion formed at the middle, and a bendable copper material connecting pipe 53, perpendicular to the connecting pipe 53 at the end of the connecting pipe 53 It is horizontally installed in the compartment position 13 in the form of forming a copper material in which a plurality of spray holes 54 are protruded so as to spray water vapor over a wide area toward the upper space 11. , It consists of a warming part 56 that wraps around the outer periphery of the connection pipe 53 and the spraying part 55 and serves to keep warm.

At this time, among the configuration of the humidifying unit 50 described above, the injection unit 55 is installed in the compartment position 13, which is the space between the upper and lower spaces 11 and 12 of the housing 10, more In detail,

The injection unit 55 is located at a preset position (if divided into two partitions, left and right, in the entire space of the discharge port 15 of the housing 10, whether the humidified air will be discharged only from the left side or the humidified air will be discharged only from the right side). to be discharged) so that the humidified air can be discharged only at one side or the other side of the compartment position 13.

Thus, in one embodiment, as shown in FIG. 3, if only the temperature and humidity controlled air (A) is exclusively discharged on the right side, only humidified air (air containing water vapor while the humidifying unit 50 is driven) (B) is discharged on the left side. It is discharged exclusively so that the temperature and humidity controlled air (A) and the humidified air (B) can be supplied separately without mutual influence.

In addition, the outside air motorized damper 60 or the second outdoor air motorized damper 65 for controlling the dew point temperature is operated by the control unit 70, which measures the dew point temperature of the room in which the housing 10 is installed as a temperature sensor. , Or, if the room where the housing 10 is installed is below the dew point temperature by measuring using a sensor 71 capable of measuring the dew point temperature, such as a dew point temperature sensor, the outdoor electric damper 60 for controlling the dew point temperature or the second outdoor electric damper (65) By opening and introducing outside air, condensation on the inner wall of the installation space is prevented.

Here, as shown in FIG. 1, when the outdoor air motorized damper 60 is opened,

The air cooled and dehumidified by the heat exchange unit 20 located at the bottom is reheated while passing through the heating unit 30, the temperature is increased, and the air is mixed with the outside air by the outdoor air damper 60, It is responsible for the function of regulating the dew point temperature,

As shown in FIG. 2, when the second electric damper 65 is opened,

The air cooled and dehumidified by the heat exchange unit 20 located at the bottom is mixed with the outside air, and the temperature and humidity increase, and is reheated by the heating unit 30 located at the top to increase only the temperature, so that the air in the air It is responsible for the function of controlling the dew point temperature of

The criterion for selectively opening the outdoor air electric damper 60 or the outdoor air second electric damper 65 is changed according to time and season, and the indoor dew point temperature can be measured by a temperature sensor or a dew point temperature sensor. When the room in which the housing 10 is installed is below the dew point temperature, the outdoor air electric damper 60 for adjusting the dew point temperature or the outdoor air second electric damper 65 is opened to introduce the outdoor air. This is to prevent condensation on the inner wall of the space.

While passing through the heating unit 30, it is reheated, the temperature is increased, and the outdoor air is mixed with the outdoor air by the outdoor air damper 60, and the dew point temperature of the air is controlled.

The control unit 70 is installed inside or outside the large-capacity constant temperature and humidity device to receive a measurement signal from the measurement sensor 71, and the measurement sensor 71 is installed on the outer periphery of the large-capacity constant temperature and humidity device of the present invention, or It is installed in the installation space where the constant temperature and humidity device is installed.

Also, as shown in Figure 5,

The sterilization unit 80 is provided above the heating unit 30 of the lower space 12, and is in charge of sterilizing harmful substances in the air supplied by adjusting the dew point temperature.

More specifically, it is inserted and mounted inside the tube body 81 in which a plurality of air permeation holes are formed, and emits light by the control unit 70, and an ultraviolet lamp 82 that sterilizes the air; characterized in that it comprises will be.

Here, in order to increase the function of sterilizing harmful substances in the air supplied by adjusting the dew point temperature, the supplied air passes through the tube body 81 having a plurality of air permeation holes, while delaying the supply speed of air. , by the ultraviolet lamp 82

It is characterized in that the function of sterilizing air is increased.

As described above, although the present invention has been described by the limited embodiments and drawings, the present invention is not limited thereto, and the technical spirit of the present invention and the following by those skilled in the art to which the present invention belongs Of course, various modifications and changes are possible within the scope of equivalents of the claims to be described.

10: housing 11: upper space
12: lower space 13: compartment location
14: intake port 15: discharge port
20: heat exchange unit 30: heating unit
40: blowing unit 50: humidifying unit
51: water tank 52: humidifying hose
53: connector 54: nozzle
55: injection unit
60: outside air electric damper 65: outside air second electric damper
70: control unit 71: measuring sensor
80: sterilization unit 81: tube body
82: ultraviolet lamp

Claims (4)

A housing 10 in which an installation space is formed and the interior is partitioned into an upper space 11 and a lower space 12;
A heat exchange unit 20 installed in the lower space 12 of the housing 10 to correspond to the inlet 14 formed on one side of the lower space 12 to cool the incoming outside air;
After being spaced apart from the upper side of the heat exchange unit 20 and flowing in from the outside air electric damper 60 installed on the other side of the inlet 14, the air exchanged with heat from the heat exchange unit 20 is mixed with each other, Heating unit 30 for heating the mixed air;
It is installed on the lower side of the outdoor air electric damper 60 to introduce outside air, and is introduced into the upper portion of the heating unit 30 to heat the heat exchange unit 20 and the upper side spaced apart from the heating unit 30. A second outdoor air damper 65 formed to be mixed again with the mixed air passing through the unit 30;
a blower 40 installed in the upper space 11 to discharge heated or cooled outside air toward the outlet 15 formed on one side of the upper space 11;
The water tank 51 is installed and fixed in the lower space 12, and the spraying part 55 is a blowing part in the compartment position 13, which is the space between the upper and lower spaces 11 and 12 of the housing 10. (40) a humidifying unit (50) installed upward in the direction and operating before driving the blowing unit (40) to adjust the humidity of the outside air discharged through the blowing unit (40);
a sterilization unit (80) provided above the heating unit (30) of the lower space (12) and sterilizing harmful substances in supplied air by adjusting the dew point temperature;
The dew point temperature of the room where the housing 10 is installed is measured, and if the room where the housing 10 is installed is below the dew point temperature, the outdoor air motorized damper 60 or the outdoor air second motorized damper 65 for adjusting the dew point temperature is selectively opened. a control unit 70 to prevent dew formation in the installation space by introducing additional outside air;
The sterilization unit 80 is inserted and mounted inside the tube body 81 having a plurality of air permeation holes, and includes an ultraviolet lamp 82 that emits light by the control unit 70 and sterilizes air;
The outside air second electric damper 65 is by the blower 40, without passing through the heat exchanger 20. Apart from the outdoor air motor damper 60 for controlling the dew point temperature for supplying additional outdoor air to the middle of the heating unit 30, the upper side of the heating unit 30 does not pass through the heat exchange unit 20 and the heating unit 30. to supply additional outdoor air; A large-capacity constant temperature and humidity device having air purification and dew point temperature control functions, characterized in that made. According to claim 1,
The humidifying unit 50
a water tank 51 in which water is stored;
a humidifying hose 52 connected to the water tank 51 and installed upright in the lower space 12;
a connecting pipe 53 connected to the upper end of the humidifying hose 52, having a curved portion formed at the middle, and capable of bending;
At the end of the connection pipe 53, it is horizontally installed in the compartment position 13 in a form perpendicular to the connection pipe 53, and a plurality of nozzles are installed so that steam can be sprayed toward the upper space 11 over a wide area. a spraying portion 55 in which 54 is formed;
a warming part 56 that serves to keep warm by wrapping around the outer periphery of the connecting pipe 53 and the spraying part 55;
A large-capacity constant temperature and humidity device having air purification and dew point temperature control functions, characterized in that it comprises a.
According to claim 1 or 2,
The injection part 55 is
Of the entire space of the discharge port 15 of the housing 10,
So that the humidified air (B) can be exclusively discharged only at the preset location,
A large-capacity constant temperature and humidity device having air purification and dew point temperature control functions, characterized in that it is installed on one side or the other side of the compartment position (13).
According to claim 3,
The controller 70 is
It is installed inside or outside the housing 10,
Air purification, characterized in that by receiving a measurement signal from the dew point temperature measuring sensor (71) installed in the installation space, controlling whether the outdoor air electric damper (60) or the outdoor air second electric damper (65) for controlling the dew point temperature is driven. and a large-capacity constant temperature and humidity device having a dew point temperature control function.

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