JPH07174390A - Air conditioner equipped with condensate preventer - Google Patents

Abstract

PURPOSE:To prevent condensate and reduce the number of rotation of a fan by a method wherein the opening degree of a water valve is regulated by a temperature signal from a dew point temperature detector so as to obtain a temperature higher than the dew point temperature of water while the rotating speed signal of an inverter, which is corresponding to the opening degree of the water valve, is outputted. CONSTITUTION:Air is sent into a room by an air-conditioning machine 7 while a dew point temperature is measured from a relative temperature corresponding to the absolute temperature and humidity of air sent out of the air-conditioning machine 7. The temperature of air is regulated by an inverter 6, regulating the amount of air sent out of the air-conditioning machine 7. A hot-water coil 8 or a cold water coil 9 is installed in the outlet ventilating passage of the air-conditioning machine 7 to regulate the temperature of ventilated air while the amount of hot-water or cold water, sent into the hot-water coil 8 or the cold water coil 9, is regulated by water valves 4, 5. The opening degrees of the water valves 4, 5 are regulated by a temperature signal from a dew point temperature detector 1 so as to keep a temperature higher than a dew point temperature while the rotating speed signals of the inverter 6, which are corresponding to the opening degrees of the water valves 4, 5, are outputted whereby condensate is prevented.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a dew condensation preventing air conditioner for controlling temperature.

[0002]

2. Description of the Related Art In the conventional indoor temperature control based on a variable air volume, when a supply air temperature limit (lower limit) is reached, it is set as a minimum rotation speed of a fan in order to prevent dew condensation.

[0003]

In the conventional air conditioners, the indoor temperature is controlled by proportional control of the rotation speed of the fan of the air conditioner and the valve in order to save energy.

However, although the minimum rotation speed of the fan is a value at which no condensation occurs when the cold water valve is fully opened, there is a problem in that the rotation speed does not become so low.

The present invention solves the problem by sending the indoor temperature sensor and the supply air temperature sensor to the digital controller to appropriately control the rotation speed of the fan and the opening degree of the cold water valve, and while preventing condensation, It is an object of the present invention to provide an air conditioner with dew condensation prevention that can further save energy by setting a lower rotation speed.

[0006]

An air conditioner with dew condensation prevention according to the present invention comprises an air conditioner for sending air into a room, a dew point temperature detector for measuring the dew point temperature of air sent out by the air conditioner, and an air conditioner. Inverter that adjusts the amount of air blown from the machine, hot water coil or cold water coil that is installed in the outlet ventilation passage of the air conditioner and adjusts the temperature of the air that is blown, and hot water or cold water sent to the hot water coil or cold water coil The water valve that adjusts the amount of water and the temperature signal from the dew point temperature detector adjust the opening of the water valve so that it is above the dew point temperature, and the inverter rotation speed signal corresponding to the opening of the water valve is output. And a digital controller for preventing dew condensation in the room.

[0007]

In the air conditioner with dew condensation prevention according to the present invention, air is sent into the room by the air conditioner, and the dew point temperature is measured from the absolute temperature of the air sent out by the air conditioner and the relative temperature corresponding to the humidity. Adjusted by an inverter that adjusts the amount of air blown from the air conditioner, installs a hot water coil or cold water coil in the outlet air passage of the air conditioner to adjust the temperature of the air that is blown, and sends it to the hot water coil or cold water coil The amount of hot or cold water is adjusted by the water valve, the opening of the water valve is adjusted to the dew point temperature or more by the temperature signal from the dew point temperature detector, and the inverter rotation speed signal corresponding to the opening of the water valve is output. , It is characterized by preventing dew condensation in the room.

[0008]

EXAMPLE An example of an air conditioner with dew condensation prevention according to the present invention will be described below. In FIG. 1, 7 is an air conditioner for sending air into the room, 1 is a dew point temperature detector (sensor) for measuring the dew point temperature from the absolute temperature of the air sent out by the air conditioner 7 and the relative temperature corresponding to humidity, 6 is an inverter for adjusting the amount of air blown from the air conditioner 7, 8
Is a hot water coil installed in the outlet ventilation passage of the air conditioner 7 to adjust the temperature of the air blown, 9 is a cold water coil, 4,
Reference numeral 5 is a water valve for adjusting the amount of hot or cold water sent to the hot water coil 8 or cold water coil 9, and 3 is a temperature signal from the dew point temperature detector 1 for adjusting the opening of the water valves 4, 5 to a temperature above the dew point temperature. , A digital controller that outputs a rotation speed signal of the inverter 6 corresponding to the opening degrees of the water valves 4 and 5, a sensor that detects an indoor temperature, a sensor that detects a supply air temperature, and a signal from each sensor. It is an air conditioner consisting of a digital controller that receives and controls and calculates, a cold water valve that operates by a signal from the digital controller, a hot water valve, and an inverter.It detects the indoor temperature and sends it to the digital controller. , When the fan rotation speed is controlled and the fan rotation speed is reduced, dew condensation will eventually occur, but at this time, the chilled water valve is not fully opened, and proportional control is performed so that the dew point temperature or higher is reached. As a result, the fan speed will be lower than when fully opened, saving energy and preventing condensation.

That is, a sensor 1 for detecting a room temperature, a sensor 2 for detecting a supply air temperature, a digital controller 3 for controlling a fan rotation speed and a valve opening degree by respective signals, a cold water valve 4 and a hot water valve 5. and an inverter 6 which divides the control of the cold water valve 3 below the value S _PH than the value S _PH, the value S
Above _PH , the supply air temperature is controlled by the sensor 2 and the value S _PH
In the following, the sensor 1 controls the room temperature. When the temperature is above S _PH , the supply air temperature is controlled so as to be maintained above the dew point, and when the temperature is below S _PH , the air flow rate is constant, so the supply air temperature rises and dew condensation can be prevented.

Since the valve is not fully opened in this S _PH , the rotational speed of the fan can be made lower than in the conventional case, and energy can be saved.

[0011]

According to the present invention, it is possible to reliably prevent dew condensation in a room.

[Brief description of drawings]

FIG. 1 is a configuration diagram of an air conditioner showing an embodiment of the present invention.

FIG. 2 is an explanatory diagram showing characteristics of a conventional air conditioner.

FIG. 3 is an explanatory diagram showing the characteristics of FIG.

[Explanation of symbols] 1 Indoor temperature detector 3 Digital controller 4 Cold water valve 5 Hot water valve 6 Inverter 7 Air conditioner 8 Hot water coil 9 Cold water coil

Claims (1)

[Claims] 1. An air conditioner for sending air into a room, a dew point temperature detector for measuring a dew point temperature of air sent by the air conditioner, and an inverter for adjusting the amount of air blown from the air conditioner. A hot water coil or a cold water coil installed in an outlet ventilation passage of the air conditioner for adjusting the temperature of air to be blown, and a water valve for adjusting the amount of hot water or cold water sent to the hot water coil or the cold water coil; A digital controller that adjusts the opening degree of the water valve so that the temperature signal from the dew point temperature detector is equal to or higher than the dew point temperature, and outputs a rotation speed signal of the inverter corresponding to the opening degree of the water valve, An air conditioner with dew condensation prevention, comprising: