JPS63172853A - air conditioner - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

[Detailed Description of the Invention] (Industrial Application Field) This invention relates to an air conditioner, and in particular, a temperature sensor that is sensitive to differences in the amount of radiant heat is provided, and the detected temperature is based on a temperature that is closer to the sensible temperature. The present invention relates to an air conditioner that can improve air conditioning comfort by controlling its operation.

(Prior Art) A specific example of an air conditioner that detects the temperature of radiant heat from the walls and floor of a room and attempts to control air conditioning operation by taking the detected temperature into account is disclosed in, for example, Japanese Patent Laid-Open No. 159042/1983. Are listed. The device is shown in FIG. 6, and as shown in the figure, a radiant temperature sensor 52 is provided in the lower part of the back side of the air conditioner main body 51, which is installed at a high place on the wall surface. This radiant temperature sensor 52 has a thermistor 55 disposed inside a casing made up of a transparent plate 53 and a heat insulating material 54'', as shown in the enlarged view of the main part in the figure. Room air does not touch the thermistor 55,
It is designed to be sensitive to radiant heat that enters from the wall or floor through the transparent plate 53. That is, the temperature detected by the room temperature detection thermistor (not shown) attached to the suction grill 56 of the main body 51 is the same as that of the thermistor 5.
This system attempts to improve the comfort of air conditioning by controlling the temperature closer to the sensible temperature that actually confuses people in the room, taking into account the detected temperature in step 5.

(Problems to be Solved by the Invention) However, in the conventional device with the above configuration, the temperature detected by the radiant temperature sensor 52 is
Alternatively, it is the radiant temperature from the floor surface, and depending on the indoor situation, a temperature that is different from the radiant heat actually received by the occupants is often detected. In particular, if there is a window on a wall that is different from the wall on which the air conditioner body 51 is installed and there are people near the window, the person will be strongly exposed to radiation from outside the window. radiant temperature sensor 52
However, this is not detected, and therefore the detected temperature has a small correlation with the sensible temperature. As a result, for example, the outside air is 0°C
When operating a heating system in a home, people are exposed to a considerable amount of cold radiation from outside the window, but because this is not properly fed back to the air conditioning control system, the temperature control equilibrium is reached while the occupants feel cold. In some cases, the temperature is maintained, and a comfortable feeling of heating can no longer be obtained.

In addition, if the radiant temperature sensor 52 having the above configuration is to accurately detect only radiant heat, it must be kept under constant temperature conditions without coming into contact with indoor air. Since the temperature inside the casing composed of the heat insulating material 54 changes due to heat conduction, etc., the radiant temperature sensor 52 detects not only fluctuations in radiant heat but also temperature changes inside the casing. As a result, there is a drawback that accurate detection of radiant heat is difficult. Further, in addition to the need for two thermistors, the room temperature detection thermistor and the radiant heat detection thermistor 55, it is necessary to provide a complicated correction calculation circuit, which has the disadvantage that the configuration becomes complicated.

This invention was made in order to solve the above-mentioned conventional problems, and its purpose is to more accurately determine the location of residents and the influence of radiant heat that actually confuses residents. It is an object of the present invention to provide an air conditioner that can improve air conditioning comfort and has a simple configuration by enabling corresponding temperature detection and performing air conditioning operation based on the detected temperature.

(Means for Solving the Problems) Accordingly, the air conditioner of the present invention is an air conditioner that performs operational control based on the detection result of a temperature detection sensor disposed in a remote control operation box 2. 2 is provided with a heat sensitive section 10 having a radiant heat exchange surface 8 having an emissivity approximately equal to that of the human body, and this heat sensitive section 10
A temperature detection sensor 3 for detecting the temperature is provided.

(Function) In the air conditioner having the above configuration, a temperature detection sensor 3 is provided in the remote control operation box 2 placed near where the resident is located, and this temperature detection sensor 3
It is designed to detect a temperature of 0. Since this heat sensitive section 10 is equipped with a radiant heat exchange surface 8 having an emissivity that is approximately the same as that of the human body, the temperature of this heat sensitive section 10 is determined by heat transfer from indoor air and heat transfer from radiant heat. It will be given as a combination of giving and receiving.

Therefore, according to the temperature detection sensor 3, the heat sensing section 10 receives and receives heat that is approximately equivalent to that of the occupant both in terms of position and configuration, and therefore temperature detection close to the sensible temperature actually felt by the human body is possible. It becomes possible.

(Example) Next, regarding a specific example of the air conditioner of this invention,
This will be explained in detail with reference to the drawings.

FIG. 3 is a schematic vertical cross-sectional view showing the indoor arrangement of an air conditioner in an embodiment of the present invention. As shown in the figure, the air conditioner main body 1 as an indoor unit is a device that is installed at a high place on a wall, and is attached to one wall in the room. In order to operate the device at a location remote from the main body 1, signals can be exchanged wirelessly with the main body 1, and
As shown in the figure, if the occupant is in the vicinity of the occupant in the room, for example, if the occupant is near the main body 1 as shown in the figure, the occupant will be at a position P in the vicinity, and if the occupant is one body 1 away, the occupant will be at a position Q.
A wireless remote control operation box 2 is provided, which will be placed in each of the. The remote control operation box 2 is equipped with a temperature detection sensor as described later, and the detected temperature is transmitted to the main body 1, and the temperature is determined according to the difference between the detected temperature and the occupant's desired indoor temperature setting. Air conditioning operation control such as changing the driving frequency of an inverter-controlled compressor provided in an outdoor unit (not shown) is performed.

FIG. 1 shows a partially sectional side view of the remote control operation box 2, and as shown in the figure, a temperature detection sensor 3 is provided at the upper end of the remote control operation box 2. As shown in FIG. This temperature detection sensor 3 provides indoor temperature information near the occupant, and the thermistor 4, which is the temperature detection part of this temperature detection sensor 3, is in contact with the inner surface of the upper plate 6 of the synthetic resin casing 5. It is placed in the same condition. Note that the thermistor 4 is surrounded by a heat insulating material 7. As shown in the plan view of FIG. 2, a heat-sensitive area is provided on the upper surface side of the upper plate 6, which is divided into squares by grooves 15, centering on the contact point of the thermistor 4. The surface of the heat-sensitive section 10 is coated with a paint having an emissivity approximately equal to that of the human body, and serves as a radiant heat exchange surface 8. Therefore, this heat-sensitive section 10 not only transfers heat through heat transfer with the airflow above it, but also transfers radiant heat equivalent to the amount that surrounding objects act on the human body. The determined temperature is closer to the temperature that the human body actually feels. This temperature is detected by the thermistor 4, and air conditioning operation is controlled based on the detected temperature. In addition, as mentioned above, the groove 15
The reason why the heat sensitive section 10 is divided in this way is to reduce the conductive heat from the casing 5 side around the thermistor 4 and improve detection accuracy. In FIG. 1, numeral 9 indicates a control circuit board disposed inside the casing 5, and in FIG. 2, numeral 16 indicates a switch section, and numeral 17 indicates a display section.

FIG. 4 shows a control block diagram when controlling the inverter-controlled compressor based on the detected temperature. The temperature signal detected by the temperature detection sensor 3 is input to the frequency calculation circuit 12, and is compared with a temperature signal corresponding to the set temperature set by the resident in the temperature setting device 11.

If the detected temperature exceeds the set temperature, a compressor stop command is issued, and if the detected temperature is below the set temperature, the compressor is stopped depending on the difference, for example, if the difference is between 0.5°C and 1°C. The frequency calculation circuit 12 selects appropriate frequency commands stored in advance, such as 707 for the machine drive frequency and 907 for the range from 1°C to 1.5°C, and compresses according to this command signal. The frequency control circuit 13 controls the drive of the motor 14 .

Figure 5 shows the temperature detection sensor 3 at the start of heating operation.
3 is a graph showing the detected temperature change in the air conditioner body 1. In FIG.
In such a case, temperature changes detected at a position P close to the main body 1 and a position Q close to the window are shown. Furthermore, the broken line indicates the temperature measurement result at approximately the center of the room using a conventional room temperature detection sensor that does not take into account the exchange of radiant heat. As shown in the figure, the temperature detected by the temperature detection sensor 3 according to the above embodiment is detected as a lower value than the conventional detection temperature during heating operation. In other words, the conventional detected temperature detects the temperature of the air-conditioned airflow circulating indoors, but in the above embodiment, the transfer and reception of heat due to radiation from the wall surface etc. is also taken into consideration. During heating operation, the temperature of the wall that forms the boundary between the heating room and the low-temperature outside air is naturally lower than that of the room, and therefore the room receives cold radiation from the wall. Therefore, even at the position P close to the main body 1, the detected temperature taking into account the radiation as described above becomes lower.

Further, the detected temperature Q near the window is further affected by cold radiation from the outdoors, which is in a low temperature state, through this window, so that the detected temperature becomes even lower. The effect of such cold radiation also acts on the human body, and therefore the detected temperature in the above embodiment approximates the sensible temperature of the human body.

When indoor temperature is controlled using conventional room temperature detection sensors, the temperature felt by the human body is actually lower, and the detected temperature is maintained at the set temperature, especially when there are people near the window. However, in reality, the temperature may feel cold, or the temperature setting must be changed each time the resident changes locations, which is cumbersome to operate.

Therefore, by installing a temperature detection sensor 3 that also takes into account the transfer and reception of radiant heat in the remote control operation box 2, and controlling the air conditioning based on the detected temperature, the temperature detection sensor 3 that takes into account the transfer and reception of radiant heat can be used to control the air conditioning based on the detected temperature. The temperature that the person actually feels will be automatically controlled so that it becomes, for example, the set temperature.

As explained above, in the past, air conditioning operation was controlled mainly based on the detected temperature of the airflow circulating in the room.For example, due to differences in radiation intensity through windows, etc. However, in the above embodiment, the temperature detection sensor 3 is provided in the remote control operation box 2, and the air conditioning operation is controlled based on the detected temperature. Therefore, it is possible to obtain temperature information at a position close to the occupant in the room, taking into consideration the exchange of heat by radiation, and therefore, air conditioning comfort is improved.

Furthermore, in the above method, the temperature of the heat sensitive section 10 is detected as a combination of heat transfer from indoor air and heat transfer by radiation, so temperature detection close to the sensible temperature is detected. is possible, and its configuration is simple.

In the above embodiment, the explanation was mainly given using heating operation as an example, but during cooling operation, the temperature of the indoor air and the outside air are reversed, and the occupant receives the radiant heat at that time. Although you will feel a sensible temperature higher than the circulating air flow temperature, the temperature detection sensor 3 with the above configuration detects a temperature approximately equivalent to the sensible temperature, so the same effect as described above is obtained during cooling operation. It becomes possible to improve air conditioning comfort.

(Effects of the Invention) As described above, in the air conditioner of the present invention, it is possible to detect the temperature close to the resident's position, so air conditioning comfort is improved by performing air conditioning operation based on the detected temperature. . In addition, heat transfer from the indoor air and heat transfer through radiation occur at the same time, and the temperature of the heat-sensing part to which the temperature is applied is detected as a combination of both, so it is determined by the sensible temperature. It becomes possible to perform closer temperature detection, and the configuration becomes simpler.

[Brief explanation of the drawing]

FIG. 1 is a side view with a partial cross section showing a remote control operation box according to an embodiment of the present invention, FIG. 2 is a plan view of the remote control operation box, and FIG. 3 is an indoor arrangement of an air conditioner according to the present invention. A vertical cross-sectional schematic diagram, Fig. 4 is a compressor operation control block diagram, Fig. 5 is a graph showing the detected temperature change at the start of heating operation, and Fig. 6 is an enlarged view of main parts showing the main body of the air conditioner of a conventional device. FIG. 2... Remote control operation box, 3... Temperature detection sensor, 8... Radiant heat exchange surface, 10... Heat sensitive section. Patent applicant: Daikin Industries, Ltd. Figure 1 Figure 3 Figure 4 Figure 5 Time Figure 6

Claims (1)

[Claims] 1. An air conditioner whose operation is controlled based on the detection results of a temperature detection sensor placed in a remote control operation box (2), wherein the remote control operation box (2) is equipped with radiant heat having a radiation rate approximately equal to that of the human body. An air conditioner characterized in that it is provided with a heat sensitive part (10) having an exchange surface (8) and a temperature detection sensor (3) for detecting the temperature of this heat sensitive part (10).