JPS61149751A - Air conditioner - Google Patents

Abstract

PURPOSE:To improve the sensing ability of a temperature sensor, by providing a sensor case, whose back side is covered with a heat insulation material and whose surface is closed by a transparent plate, for either one of indoor unit body or remote controller, and by fitting a radiant temperature sensor element in the sensor case. CONSTITUTION:A temperature sensor 14 to detect radiant temperature, fitted on the bottom 1b in front of an indoor unit body 1 detects the radiant temperature from the wall 2 and the floor of a room. The temperature sensor 14 is constituted in such a manner that a radiant temperature sensor element 18 is fitted in a sensor case 17 of which back side is covered with a heat insulation material 15 and of which surface is capped with a transparent plate or a transparent window 16. Accordingly, the sensor element 18 does not directly contact with the room air, detecting the radiant heat from the wall and from others through the transparent plate 16. When the detected temperature by the temperature sensor 14 is lower than the room temperature, a controller controls it by correcting the set temperature of a room temperature sensor 7 some degrees C lower than the temperature before. If the detected temperature is higher, the set temperature is corrected reversely.

Description

DETAILED DESCRIPTION OF THE INVENTION [Technical Field of the Invention] The present invention relates to an air conditioner that cools and heats a room, and particularly relates to an indoor temperature control device in this air conditioner.

[Technical background of the invention and its problems]

Generally, the indoor temperature control device in this type of air conditioner detects only the indoor temperature and controls the temperature.

That is, the indoor temperature control device turns on the operation of the compressor based on the temperature difference between a preset temperature and the indoor temperature.
It is designed to bring the indoor temperature closer to the set temperature.

On the other hand, indoor temperature control devices use temperature sensors, wall temperature sensors, etc. to improve indoor comfort.
Those that use a radiant heat sensor that detects radiant heat,
Already proposed. Among the above-mentioned systems, the magnitude of radiant heat is detected as a condition that affects human comfort, and when the radiant heat is large, the room temperature is set to be low.

On the other hand, detection means using a radiant heat sensor that accurately detects the magnitude of radiant heat has already been proposed. Due to the fact that the radiant heat sensor is installed in However, there are drawbacks such as a decrease in detection accuracy.

In particular, with the radiant heat sensor, the measurement sensitivity decreases in proportion to the set distance when dealing with radiant energy from walls, etc. Due to this, it is difficult to accurately detect radiant energy and control indoor temperature. However, there are also drawbacks such as a decrease in the responsiveness of the radiant heat sensor.

[Purpose of the invention]

In order to solve the above-mentioned difficulties, the present invention aims to control the radiant temperature of indoor walls, etc. in accordance with human comfort using a radiant temperature sensor provided in the indoor unit main body. It provides air conditioners.

[Summary of the invention]

The present invention covers the back side of either the indoor unit main body or the remote controller with a heat insulating material, and furthermore,
A sensor case is provided whose surface is covered with a transparent plate, and a radiation temperature sensor element is attached inside this sensor case, and the temperature sensor element is configured to detect the radiation temperature of the indoor wall surface, etc. This is what I did.

(Embodiment of the Invention) Hereinafter, an illustrated embodiment in which the present invention is applied to an air conditioner for indoor cooling and heating will be described.

In FIGS. 1 to 7, reference numeral 1 indicates a wall 2 inside the building.
This is an indoor unit body of an air conditioner installed in an air conditioner, etc., and on the front side (front) 1a of this indoor unit body 1, there is a suction grill (intake) 3 that sucks indoor air, and a suction grille (suction port) 3 that blows out heat-exchanged air. Air outlet grill (air outlet) 4 and operation panel 5
As shown in FIG. 3, inside the indoor unit main body 1, an air filter 6, an air temperature sensor 7 for detecting the indoor temperature, and an indoor heat exchanger 18 equipped with a blower are installed in order, as shown in FIG. is provided. Also, the 6th
As shown in the figure and FIG. 7, the air temperature sensor 7 is connected to a variable resistor 9 as a temperature setting device, and this air temperature sensor 7 detects the indoor suction air temperature. The set temperature of the temperature setting device 9 is calculated by a comparator 10, and the calculated value by the comparator 10 is inputted to a microcomputer (microcomputer) 11. The rotation of the motor 13 of the compressor is controlled.

For example, if the indoor air temperature detected by the air temperature sensor 7 is a, and the set temperature set by the indoor temperature setting device 9 is TS, then the temperature will be as shown in Table 1 below during cooling and heating. It is designed to control the air temperature.

Table 1 However, on indicates operation, and off indicates stop.

On the other hand, a radiant temperature sensor 14 for detecting radiant temperature is provided at the front lower part 1b of the indoor unit main body 1 to detect radiant temperature of the walls 2, floor surface, etc. of the room. In particular, as shown in an enlarged view in FIG. 4, this temperature sensor 14 has a sensor case 17 whose back surface is covered with a heat insulating material 15 and whose surface is covered with a transparent plate (transparent window) 16. A radiation temperature sensor element 18 is attached therein.

Therefore, as shown in FIGS. 6 and 7, the radiation temperature sensor 14 detects the radiation temperature (
radiant heat), the comparator 20 calculates the set temperature of the temperature setting device 19, the value calculated by the comparator 20 is input to the microcomputer 11, and the inverter control circuit 12 controls the refrigeration cycle. The rotation of the motor 13 of the refrigerant compressor constituting the refrigerant compressor is controlled.

In particular, since the radiation temperature sensor element 18 is housed in the sensor case 17, it is not in direct contact with the indoor air, and instead detects the radiant heat from the walls etc. through the transparent plate 16. There is. In this case, wall 2
When the temperature of the wall 2 is low, the temperature detected by the temperature sensor 14 is lower than the room temperature, and when the temperature of the wall 2 is high, the temperature detected by the temperature sensor 14 is lower than the room temperature.
The temperature detected by the temperature sensor 14 is higher than the room temperature.

Therefore, when the temperature detected by the temperature sensor 14 is low, the indoor air temperature Ta in Table 1 is corrected to a temperature several degrees lower and controlled as shown in Table 1. When the detected temperature in Table 14 is high, the indoor air temperature Ta in Table 1 is corrected to a temperature a few degrees higher, and control is performed as shown in Table 1 above.

As a result, it is possible to perform control more suited to human comfort than by controlling the indoor air temperature Ta itself, and the indoor temperature can be controlled effectively and appropriately.

On the other hand, as shown in the graph of FIG. 5, during heating, the curved line shows the indoor temperature curve, the curve mW shows the temperature characteristic curve measured by the radiation temperature sensor 14, and the curve 2 shows the temperature characteristic curve of the wall 2.
As is clear from the club shown in FIG. 5, when both temperature sensors 7 and 14 are activated, for example, during heating, at the same time as the operation is turned on,
The air temperature sensor 7 operates and immediately detects the indoor temperature, and as shown in the indoor temperature control section of FIG. As a result, the temperature sensor 14 for radiation detects this and slowly rises. Therefore, in the initial stage of operation, even if the indoor temperature rises, the motor 13 of the refrigerant compressor is controlled by the temperature sensor 17 for radiation. Corrected. Also, since the indoor temperature after correction rises slowly, the indoor temperature is the set temperature rtttrm, on-off IJtM11C
When the temperature of the wall 2 increases, the indoor temperature gradually approaches the set temperature, and when the wall temperature reaches a sufficiently high temperature, the indoor temperature is controlled to be below the set value. This enables energy-saving operation.

Next, in another embodiment of the present invention shown in FIG. 8, the sensor case 17 of the radiation temperature sensor 14 is
is formed on a convex lens 16' as a condensing lens, and radiant heat is applied to the radiation sensor element 18 in several increments.

Another embodiment of the present invention shown in FIG. 9 has the same structure as the embodiment described above, in which the transparent plate 16 is formed into a Fresnel lens 16''.

Although the present invention has been described with reference to an embodiment in which a radiation temperature sensor 14 is provided in the indoor unit main body 1,
For example, the design can be changed freely so that it can be attached to a detachable remote controller.

〔Effect of the invention〕

As described above, according to the present invention, the indoor unit main body 1
Alternatively, either one of the remote controllers is provided with a sensor case 17 whose back surface is covered with a heat insulating material 15 and whose surface is covered with a transparent plate 16, and a radiation temperature sensor element 18 is provided within this sensor case 17. This temperature sensor element 18 is used to detect the radiant temperature of the indoor walls, etc., which not only makes it possible to control the temperature according to human comfort, but also has a simple configuration. At the same time, the installation position does not interfere with other components, and moreover, the abrasive characteristics of the temperature sensor can be improved.

[Brief explanation of the drawing]

FIG. 1 is a front view of the air conditioner according to the present invention, FIG. 2 is a side view of the same, FIG. 3 is an enlarged sectional view taken along the chain line A-A in FIG. 1, and FIG. 5 is a graph showing the relationship between indoor temperature and time according to the present invention, and FIG. 6 is a block diagram of the temperature control device incorporated in the present invention. FIG. 7 is a circuit diagram of the temperature control device, and FIGS. 8 and 9 are diagrams showing other embodiments of the present invention. 1... Indoor unit body, 3... Suction grill, 4...
...Blowout grill, 7...Air temperature sensor, 14...
・Radiation temperature sensor, 15...insulating material, 16...
Transparent plate, 17...Sensor case, 18...Radiation temperature sensor element. Applicant's agent Kiyoshi Inomata Figure 1 Figure 2 Figure 5

Claims (3)

[Claims] 1. A sensor case is provided on either the indoor unit main body or the remote controller, the back surface of which is covered with a heat insulating material, and the surface of which is covered with a transparent plate.
An air conditioner characterized in that a radiant temperature sensor element is attached inside the sensor case, and the temperature sensor element detects the radiant temperature of a wall surface or the like in the room. 2. The air conditioner according to claim 1, characterized in that a temperature sensor is installed obliquely at the front lower part of the indoor unit main body. 3. The air conditioner according to claim 1 or 2, wherein the transparent plate is a convex lens or a Fresnel lens.