KR20020091003A - Energy Save Air Handling Unit - Google Patents

Abstract

PURPOSE: A power saving thermohydrostat is provided to minimize energy consumption with optimum control. CONSTITUTION: A cooling dehumidifying coil(21) and a plate type heat exchanger(22) are installed on a front end of a thermohydrostat to separate dehumidifying function and integrated with a cooling coil(11), a heating coil(12), a humidifying sprayer(13) and a supply air blower(14) on a rear end. A supply air bypass control damper(25) is installed to detect humidity of supply air by supply air temperature and humidity detector(24) and to switch supply air passage based on setting indoor humidity.

Description

Energy saving air temperature and humidity unit {Energy Save Air Handling Unit}

The present invention relates to an energy-saving constant temperature and humidity device that can be installed in an indoor air conditioner required for constant temperature and humidity of a clean room, such as an electronic factory, to save cooling and reheat energy during cooling and dehumidification operation according to an increase in humidity. The present invention relates to an energy saving thermo-hygrostat device capable of achieving an efficient thermo-humidity object.

Conventional thermo-hygrostat and air conditioner currently used is equipped with cooling coil, heating coil, humidification spraying device as shown in Fig. 1 to set the room temperature 22 ℃ and relative humidity 50% Doing

The dehumidification operation of the constant temperature and humidity process cools the air to 12 ℃ because it cools below the dew point temperature of the set room humidity, so it is supercooled and needs to be reheated to the set room temperature of 22 ℃, and it consumes energy costs due to the opposite action of cooling and heating. Is very large.

The present invention has been invented to solve the above problems, by separating the dehumidification function in front of the thermo-hygrostat device by installing a dehumidifying cooling coil and a plate heat exchanger to exchange heat between the supercooled air and the air supply to precool and preheat the cooling And reheat energy, and the humidity control method calculates the three-element control of the absolute humidity control method that is constant even with the temperature change. It is an object of the present invention to provide an energy-saving thermo-hygrostat system and apparatus for achieving this.

1 is a block diagram of a conventional thermo-hygrostat

Figure 2 is a block diagram of an energy saving constant temperature and humidity device according to the present invention

Figure 3 is a temperature state diagram of the energy saving constant temperature and humidity device according to the present invention

<Explanation of symbols for main parts of drawing>

1,11: cooling coil 2,12: heating coil

3,13: humidification spray device 4,14: supply blower

5,15: Air control damper (OA: Out Air) 6,16: Indoor temperature and humidity detector

21 cooling dehumidification coil 22 plate heat exchanger

23: air supply chamber 24: air temperature and humidity detector

25: Air supply bypass control damper 26: Bypass chamber

27: outlet temperature and humidity detector

The present invention for achieving the above object is to separate the dehumidification function in the constant temperature and humidity system to recover the super-cooled heat, and characterized by a significant energy saving by the absolute humidity three-element control method.

Hereinafter, described in detail by the accompanying drawings as follows.

As shown in FIG. 2, the energy-saving thermo-hygrostat apparatus of the present invention is largely equipped with a cooling dehumidification coil 21, a plate heat exchanger 22, an air supply bypass control damper 25, and a temperature control and humidification function part. The coil 11, the heating coil 12, the humidifying spray device 13, and the supply blower 14 may be divided into the parts.

When the outside air passes through the outside air control damper 15 in the summer with high humidity and flows into the air supply chamber 23, the air supply temperature humidity sensor 24 detects the humidity, and closes the air supply bypass control damper 25 to supply the plate. While passing through the heat exchanger 22, it is pre-cooled by exchanging heat with the supercooled air, and is cooled and dehumidified in the cooling dehumidification coil 21.

The super-cooled air that has been dehumidified in this manner passes through the plate heat exchanger 21 to exchange heat with the supply air to become preheated air. The cooling coil 11, the heating coil 12, and the humidifying spray device are introduced into the air supply bypass chamber 26. While passing (13), it is constant temperature and humidity suited to the set room temperature and humidity, and is supplied to the room by the supply blower (14).

In winter and spring, when the outside air humidity is low, when the outside air passes through the outside air control damper 15 and enters the air supply chamber 23, the air supply temperature humidity sensor 24 detects humidity to open the air supply bypass control damper 25 to supply air. Flows into the air supply bypass chamber 26 and passes through the cooling coil 11, the heating coil 12, and the humidification spray device 13, and is then constant-humidified appropriately to the set room temperature and humidity. Supplied.

In addition, the main function of the humidity control is the absolute humidity three-element control method, the room temperature humidity sensor (16), the air supply temperature and humidity sensor (24) and the air humidity sensor (27) at the outlet of the device to detect and calculate the humidity to set the humidity in the room to absolute humidity It has a function to adjust quickly.

Fig. 3 is a state diagram of the air supply temperature before and after the plate heat exchanger 22 and the cooling dehumidification coil 21 of the apparatus dehumidification function, and the air supply 30 ° C. is based on the set room temperature 22 ° C. and the relative humidity 50%. The cooling energy is reduced to 50% because the cooling is precooled to 21 ° C. to 12 ° C. in the cooling dehumidification coil 21, and the reheated air is supercooled to 12 ° C. in the cooling dehumidification coil 21. Preheated to 21 ℃ in the heating coil 12 is raised to 22 ℃ heating energy is dramatically reduced.

As described above, the present invention recovers the supercooled energy generated during the dehumidification process of the thermo-hygrostat device and effectively uses the air of the dehumidification process by precooling and preheating the air. Control has the effect of achieving the goal of constant temperature and humidity with the lowest cost of energy.

Claims (4)

In the constant temperature and humidity device such as cooling dehumidification and temperature control and humidification to maintain a constant indoor temperature and humidity, A defrosting cooling coil 21 and a plate heat exchanger 22 for recovering supercooling heat are installed in front of the constant temperature and humidity chamber, and the dehumidification function is separated, and the cooling coil 11, the heating coil 12, and the humidification spray device 13 are separated. ), A constant temperature and humidity device integrated with the supply blower (14). The method of claim 1 A constant temperature and humidity device provided with an air supply bypass control damper 25 which detects the air supply humidity with the air supply humidity controller 24 and switches the air supply flow path according to the set indoor humidity. The method of claim 1 The cooling and dehumidifying coil 21 for dehumidification and the plate heat exchanger 22 for recovering the supercooling heat are separate from the cooling coil 11, the heating coil 12, the humidification spray device 13, and the supply blower 14 at the rear stage. A constant temperature and humidity device for dehumidification. Humidity control is a constant temperature and humidity device that detects room temperature humidity, supply air temperature humidity, and outlet temperature and humidity of this device and calculates and controls them with three elements of absolute humidity.