JPS6179930A - Method for controlling humidity and temperature in air conditioning machine - Google Patents

Abstract

PURPOSE:To restrict the condensation on a wall surface, limit an excessive increasing of temperature at a wet ball and shorten a transfer time for a stable air conditioning by a method wherein when condition of temperature and humidity is to be varied, control conditions for temperature and humidity are combined with a condition of wall temperature and a condition of dew point. CONSTITUTION:An outdoor room 3 is provided with an outdoor air conditioning device 6 and a temperature and humidity sensing device 8. Further, a sensor 13 for measuring a dew point at the outdoor side and a sensor 15 for measuring a wall surface temperature are arranged. The temperature and humidity are set such that a dry ball temperature signal and a wet ball temperature signal from the temperature and humidity sensor 8, a dew point signal from a dew point sensor 13 and a wall surface temperature signal from a wall surface temperature sensor 15 are inputted to a control circuit and then their conversion, comparison and calculation are performed. Further, they are combined with a timer signal from a delay timer part, outputted from the output part to a dry ball temperature adjusting meter and a wet ball temperature adjusting meter, passed through an electric power adjusting unit so as to control a heater and a humidifying heater.

Description

DETAILED DESCRIPTION OF THE INVENTION Field of Industrial Application The present invention relates to a method of controlling temperature and humidity when changing indoor temperature and humidity conditions using an air conditioner.

Conventional configuration and its problems Conventionally, when an air conditioner is installed and operated in a balanced indoor calorimeter as shown in Fig. 4, the indoor and outdoor temperature and humidity conditions are determined based on JISC9612-based cooling conditions and heat pump heating. After stable operation under the specified conditions, the cooling and heating capacities of the air conditioner are to be measured.
When changing suddenly from 6°C to 35/24°C, the temperature and humidity of the air outside the room rises relatively quickly, whereas the surface temperature of walls and air conditioners rises slowly due to heat capacity. As a result, dew condensation occurs on walls and air conditioner surfaces, and the wet bulb temperature reaches 24°C before the dry bulb temperature rises to 35°C, causing the dry bulb temperature to rise to 35°C.
When the temperature reached 5°C, the bulb temperature sometimes rose too much, which often became an obstacle to quickly stabilizing temperature and humidity conditions and accurately measuring cooling capacity.

Purpose of the Invention In view of the above points, the present invention combines the temperature and humidity control conditions with an arbitrary delay timer condition, the wall temperature condition, and the dew point temperature condition. 0 Structure of the Invention The present invention aims to suppress dew condensation and hasten the transition time to stability. It consists of a humidity output section.

DESCRIPTION OF EMBODIMENTS An embodiment of the present invention will be described in detail below with reference to the drawings.

FIG. 1 is a cross-sectional view of a balanced indoor calorimeter, in which 3 is an outdoor room, 6 is an outdoor air conditioner, and 8 is an outdoor temperature/humidity detector. Detects bulb temperature and wet bulb temperature. Further, 1o and 11 are an indoor unit of a separate type air conditioner, 7 and an outdoor unit, 13 is a dew point sensor on the outdoor side, and 15 is a wall surface temperature sensor on the outdoor side.

FIG. 2 is a diagram showing the temperature and humidity control system, in which the dry bulb temperature signal and wet bulb temperature signal from the temperature and humidity detector 8, the dew point temperature signal from the dew point sensor 13, and the wall surface The wall surface temperature signal from the temperature sensor 15 is input to the control circuit section, where it undergoes processing such as conversion, comparison, and calculation.It is also combined with a timer signal from a delay timer part in the control circuit section, and is sent to the dry bulb from the output section. It is output to the temperature controller and wet bulb temperature controller, and controls the heating heater and humidifying heater through a power regulator, respectively.

FIG. 3 is a flowchart showing the temperature and humidity control method. For example, from heat pump heating conditions (outdoor soft bulb/wet bulb temperature -7°C/6°C) to cooling conditions (outdoor soft bulb/wet bulb temperature -7°C/6°C)
When the temperature and humidity conditions are changed to (24°C), the output of the humidifying heater is first set to zero while the output of the heater remains unchanged. Then, after a certain period of time (for example, 20 minutes) has passed, the heater output is turned on. This operation temporarily removes residual heat from the humidifying heater, lowers the dew point of the wall surface, etc., and then turns on the heater.

Next, a conditional branch such as "tk>tp tp'+α" is made. In other words, the wall surface temperature tk is the dew point temperature tp of the air at that time.
is larger than the set temperature (i.e. 3 in this case).
5/24°C) corresponding to the dew point temperature tp' (in this case 1
9.5°C) plus an arbitrary temperature α (for example, 2°C), turn on the humidifying heater output,
If this is not the case, the humidifying heater is controlled not to be turned on.

Then, even after rtk>tp<tp'+α" is established and the humidifying heater is turned on, monitoring continues under the condition rtk>tp<tp'+α. If the condition is not satisfied, the humidifying heater is turned off and "tk >tp<tp′+α” is checked. If the condition "tk > tp x tp' + α" continues to be satisfied and the output of the controller becomes stable for both dry bulb and wet bulb temperatures, the target temperature and humidity will be reached and stabilized, and this control system will be removed. become.

Here, the condition "tk>tp x tp'+α" will be explained in an easy-to-understand manner. tk＞tp is wall temperature tk
is higher than the dew point temperature 1p of the air at that time, and in this case, there is no fear of dew condensation on the wall surface, so the humidifying heater may be turned on. Also, 1pt + t+a is,
The dew point temperature at that point is α (2°
If the temperature is lower than the sum of C) (21.5°C), you can turn on the humidifying heater. If the temperature is slow to reach, for example if the wet bulb reaches 24°C while the dry bulb only reaches 28°C,
The β point temperature has risen to 22.5°C, and even if the humidification output is zero after reaching this state, if the dry bulb temperature rises to 35°C at the same dew point temperature, the wet bulb humidity will be 25. Since the temperature reaches 8°C, it takes a long time to lower the temperature to 24°C again, which is not desirable. YueK
The dew point temperature is limited by the condition tp<tp'+α, thereby preventing the wet bulb temperature from rising too high.

In this embodiment, the delay timer was set to 20 minutes and α was set to 2°C, but these may be set as desired. Further, in this method, a set point sensor '+ was used, but the dew point temperature may be determined by a calculation formula from the dry bulb and wet bulb temperatures. In addition, in the control circuit section of Fig. 2, as shown in Fig. 3, the timer delay,
A circuit for controlling arithmetic comparison can be realized relatively easily using well-known technology.

Effects of the Invention As is clear from the above embodiments, the method for controlling the temperature and humidity of an air conditioner according to the present invention uses the target temperature and humidity conditions, delay timer conditions, and indoor wall surface temperature when changing the indoor temperature and humidity conditions by the air conditioner. It is designed to output temperature and humidity control output depending on the combination of conditions and dew point temperature conditions, and stabilizes air conditioning by suppressing dew condensation on walls, etc., and preventing excessive rise in wet bulb temperature. This has excellent effects such as shortening the transition time.

[Brief explanation of the drawing]

Fig. 1 is a cross-sectional view of a balanced room calorimeter according to an embodiment of the present invention, Fig. 2 is a block diagram showing a control system for the same temperature and humidity, and Fig. 3 is a flowchart of the same temperature and humidity control method. , FIG. 4 is a sectional view of a conventional balanced room type calorimeter, and FIG. 5 is a block diagram showing a control system for the same temperature and humidity. 3... Outdoor room, 6... Outdoor air conditioner, 8... Outdoor temperature/humidity detector, 10...
... Air conditioner indoor unit, 11... Air conditioner outdoor unit, 13... Dew point sensor, 15.
...Wall surface temperature sensor. Name of agent: Patent attorney Toshio Nakao and 1 other person
1 Figure 2 Figure 3

Claims (1)

[Claims] When changing the temperature and humidity conditions in a room equipped with an air conditioner, in addition to controlling the temperature and humidity, an arbitrary delay timer condition, an indoor wall temperature condition, and a dew point temperature condition are controlled in combination. How to control the temperature and humidity of an air conditioner.