JPS5956031A - Temperature controlling method of air conditioner - Google Patents

Abstract

PURPOSE:To avoid uncomfortableness due to drastic change of the room temperature, by taking the room temperature after passing of a prescribed time from starting of space-cooling operation as a reference temperature, and taking a temperature a certain level lower than the reference temperature as a set temperature. CONSTITUTION:Starting space-cooling operation after turning a switch ON, the temperature after passing of a prescribed time is taken as a reference room temperature TR, and a temperature a certain level DELTAT lower than the reference room temperature TR is taken as a set temperature. Here, since space-cooling operation is started already, there is fear of sampling a temperature slightly lower than the initial room temperature. However, since noticeable drop of the room temperature is caused after passing of about 2min from starting of space- cooling operation, drop of the room temperature in the above while is about 0.3-0.5 deg.C. Therefore, it is enabled to make the user fuel coolness simultaneously with throwing-in of an operation switch.

Description

DETAILED DESCRIPTION OF THE INVENTION Field of the Invention The present invention relates to a temperature control device for an air conditioner.

Conventional configuration and problems There is a method of controlling the room temperature of an air conditioner by sampling the room temperature at the start of operation, setting this as the initial room temperature, and setting a temperature lower than the initial room temperature as the set temperature.

This control method has been common for a long time, in which the user sets the thermostat to the desired temperature and the air conditioner is set to that temperature.

It has several advantages over control methods that approach room temperature.

In the first case, when the initial room temperature or the outdoor temperature is very high, the room temperature does not become extremely low compared to this, so there is less discomfort caused by the temperature difference, and over-cooling that has health consequences can be prevented.

In addition, the second iris always operates when turned on even at low temperatures, so it is comfortable when a person feels hot even at low temperatures, such as when taking a bath, immediately after returning home, or when the humidity is high.

As described above, while the method of determining the set temperature from the room temperature at the start of operation has many advantages, it also has major drawbacks.

The drawbacks will be explained below with reference to FIG. .

In the figure, the disadvantage is that depending on the position of the temperature sensor that measures the room temperature at the start of operation, the temperature Tα of the area where people are in the air-conditioned room may be different from the temperature Tα, and the set temperature may be different as shown in the figure. The point is that there is. For example, in wall-mounted indoor units, which are currently the mainstream of home air conditioners, temperature sensors are mostly installed at the air intake in front of the evaporator or inside the remote control. Generally, as warm air rises, the temperature inside the room is higher near the ceiling where the air inlet of the wall-mounted indoor unit is located than in the center of the room where there are many people. There can often be a significant difference in temperature from the center of the room due to temperature intrusion from the outside or 1-1 radiation. In an indoor unit that has not been in operation for much time, cold air that has lost heat to the evaporator accumulates around the evaporator, and the temperature sensor in the suction 1 monitors the temperature of this air. Often sensed.

If the temperature sensor incorrectly detects the initial room temperature under the above conditions, if it detects a temperature Tβ higher than the temperature Ta of the fire in the room, the operating time will be significantly shortened and the temperature will be insufficiently cooled, which is almost the opposite. If the temperature τγ is detected, it will lead to excessive cooling.

In order to solve these problems, it is necessary to stir the indoor air before measurement to make the indoor air temperature distribution uniform. However, one of the features of this type of control method is that in order to accurately sample the room temperature, the compressor is stopped and only the indoor blower is operated until the hot water temperature distribution becomes uniform. The advantage of being reliably and immediately cooled down regardless of the thermostat when the operation switch is turned on is lost, and lukewarm air is blown out for a while even after the switch is turned on, resulting in a loss of comfort.

A first aspect of the present invention is to solve the above-mentioned drawbacks of the conventional technology, and aims to provide comfortable air conditioning without excessive cooling or insufficient cooling from the start of operation. .

Structure of the Invention In order to achieve this object, the present invention starts cooling operation immediately after turning on the operation switch, samples the indoor temperature after a predetermined period of time, and sets a lower temperature among the constant temperatures based on this temperature. It was designed to do so.

With this configuration, cooling can be performed immediately after turning on the operation switch, and a comfortable temperature setting can be performed when cooling operation has been completed.

DESCRIPTION OF THE EMBODIMENTS An embodiment of the present invention will be described below with reference to FIGS. 2 to 4 of the accompanying drawings.

First, the control circuit used in this embodiment will be explained with reference to FIG.

In the figure, 11.12i1 is an indoor blower and an outdoor blower, 13 is a bypass valve that controls the amount of circulating refrigerant as is well known, and 14 is a compressor, respectively, and a drive power source 15 and an electromagnetic switch normally open contact 16a. ~19a. 20 is a power supply for the control circuit, 21 is a temperature sensing element, and constitutes a temperature detection circuit consisting of a resistor 22, a ladder resistor 23, and a voltage comparator 24, and detects the room temperature by a dynamic scan method. Since the temperature detection method is well known, a description thereof will be omitted. 25rl: 'Ni, a transistor that drives the magnetic switch coils 16 to 19.

Reference numeral 26 is a 4-bit 1-chip microcomputer, which has a dynamic scan function for the temperature detection circuit, a drive function for the transistor 25, a timer function, etc., and realizes the air conditioning function of the present invention.

Next, the functions of the microcomputer 26 will be explained using the flowchart of FIG. 4, which shows an overview of the portions related to the present invention.

First, when the user turns on the operation switch, cooling operation starts immediately. and for a predetermined period of time (20 seconds ~
After approximately 2 minutes have passed, sample the room temperature. This time takes 20 seconds to stir most of the room air and takes into account variations in sensor tracking. This is used as the reference room temperature TR in place of the initial room temperature of the conventional example. That is, the set temperature is set to be a temperature lower than the reference room temperature TR by a constant temperature T. In this case, since cooling has started, there is a risk of sampling a temperature lower than the initial room temperature, but various experiments have shown that under typical house temperature and humidity conditions, the temperature of the entire room will drop rapidly as shown in Figure 2. It has been confirmed that the cooling starts at -C, about 2 minutes after the start of cooling.

The decrease in room temperature during this period is about 0.3 to 0.5°C, which is not a problem compared to the fluctuation in temperature of about 2°C when sampling the initial room temperature. In addition, although it takes about 2 minutes for the temperature of the entire room air to change as mentioned above, it takes 10 seconds for the temperature of the air to drop to 11 degrees Celsius, so the user can turn on the cooling fan at the same time as turning on the operation switch. You can feel the feeling.

Effects of the Invention As described above, the present invention starts cooling operation immediately after turning on the idle switch, samples the indoor temperature after a predetermined period of time, and sets a temperature a certain range lower than the reference temperature to the set temperature. Even if the room temperature is low, cold air is immediately blown out immediately after the start of operation, so it is possible to take a bath at 9:00 a.m. or come home at 1:00 p.m. ! 4. The soil is comfortable even in low temperature and high humidity conditions, and the indoor air is agitated by the cooling operation for a specified period of time, making the room temperature distribution uniform, so the temperature in the space where the user is.
There is no fear that sampling a higher temperature will result in insufficient cooling, or conversely, sampling a temperature close to it will result in too much cooling, and there is also less error in the sambling temperature due to a drop in room temperature due to the temperature during this period. It is a very simple method that has great effects.

[Brief explanation of drawings]

Figure 1 shows the initial sampling in the conventional temperature control method? , it /Jf difference is expressed as a temperature change in a part of the sensor at 7F. Figure 2 is a diagram of room temperature change from the start of cooling, and Figure 3 is a temperature diagram in one embodiment of the present invention. FIG. 4 is a schematic electrical circuit diagram of the control device, and is an explanatory diagram showing the sequence of the microconbeater used in the control device. 11...Indoor blower, 12...Outdoor blower, 14...Compressor, 21...River temperature sensing element, 26...Micro combination, - 1 evening. Name of agent: Toshi Nakao, Ben Jjljjian
Figure 3 Figure 24

Claims (1)

[Claims] The air conditioner starts cooling operation immediately after turning on the operation switch, samples the indoor temperature after a predetermined period of time, uses this temperature as the reference temperature, and sets the lower temperature among the constant temperatures based on this reference temperature. Temperature control method.