JPH0715332B2 - Automatic temperature setting device for air conditioner - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION <Industrial application> The present invention detects an infrared ray emitted from a human body and automatically sets a room temperature set temperature based on a body surface temperature of the human body. Automatic temperature setting device.

<Prior Art> Conventionally, there is the following air conditioner provided with an automatic temperature setting device (JP-A-62-91735). This air conditioner is equipped with a temperature detector that detects the room temperature, a plurality of switch parts that input thermal sensations such as "hot" and "cold", and set temperature determination means, so that the occupants can say "hot". When the "hot" switch of the switch section is input when the user feels it, the set temperature determination means changes the set temperature to a temperature lower than the room temperature at that time by a certain temperature. On the other hand, when the occupant feels "cold" and inputs the "when cold" switch, the set temperature determining means changes the set temperature to a temperature higher than the room temperature by a certain temperature.

<Problems to be Solved by the Invention> As described above, the air conditioner equipped with the conventional automatic temperature setting device changes the set temperature when the occupant inputs the switch “when it is hot” or “when it is cold”. Since the room temperature at that time is used as a reference and the temperature is changed by a constant temperature, there is an advantage that operability can be simplified and comfort can be improved.

However, for example, when cooling / heating is performed by a heat pump air conditioner having a wall-mounted indoor unit, the temperature distribution in the room is not uniform. Therefore, residents are "comfortable"
When the user moves from an arbitrary place (person position) where he feels to be to a person position where he feels "cold", the "when cold" switch is input. Then, the set temperature is changed by a certain temperature, and the user feels "comfortable" again. However, if the user moves inside the room again after a while, the thermal sensation changes, and the switch section must be operated again. Therefore, when moving indoors, the switch section has to be carried and the switch section must be operated each time the thermal sensation changes due to the movement, resulting in a very poor operability.

Further, when the indoor temperature is moved, the difference between the indoor temperature at the human position before the movement and the indoor temperature at the human position after the movement is changed by the set temperature determining means by one operation of the switch section. If the temperature exceeds the range, there is a problem that the temperature sensation does not reach "comfort" even though the switch is operated, and the switch has to be operated again.

Therefore, an object of the present invention is to detect a human position, and when the human position changes, detect the body surface temperature of the human body at the human position before and after the change, and measure the body surface temperature due to the movement of the human body. It is an object to provide an automatic temperature setting device for an air conditioner that has very good operability and comfort by automatically changing the set temperature of room temperature based on the amount of change.

<Means for Solving Problems> In order to achieve the above object, the automatic temperature setting device for an air conditioner according to the present invention detects a human position by detecting infrared rays emitted from a human body. The body surface temperature sensor 2 for detecting the body surface temperature of the human body at the human position detected by the human position detecting means 1, and the body surface temperature of the human body detected by the body surface temperature sensor 2 for the human position. When the human position detected by the detection unit 1 is displaced, the body surface temperature storage unit 7 stores the body position separately before and after the change, and the change in the human position stored in the body surface temperature storage unit 7. According to the body surface temperature before and after the change, the set temperature change amount calculating means for calculating the set temperature change amount of the room temperature based on the change amount of the human body surface temperature due to the movement, and the set temperature change amount calculating means It is characterized in that a set temperature changing means for changing the set temperature at room temperature is provided according to the set temperature change amount.

<Operation> Infrared rays emitted from the human body are detected by the human position detecting means 1. Further, the body surface temperature of the human body at the detected human position is detected by the body surface temperature sensor 2,
The detected body surface temperature is stored in the body surface temperature storage unit 7. At that time, when the person position detected by the person position detecting means 1 changes, the body surface temperature is divided into a body surface temperature before the person position is changed and a body surface temperature after the person position is changed. It is stored in the storage means 7.

Then, the set temperature change amount calculation means sets the room temperature set temperature based on the change amount of the body surface temperature of the human body due to the movement according to the body surface temperature at the human position before and after the change stored by the body surface temperature storage unit 7. Calculate the amount of change.
Then, according to the calculated set temperature change amount, the set temperature of the room temperature is changed by the set temperature changing means.

Therefore, it is not necessary for the operator to always carry the switch section for inputting a feeling of heat and input the switch section each time he feels "hot" or "cold" as he moves.

<Examples> The present invention will be described in detail below with reference to the illustrated examples.

FIG. 1 is a block diagram showing an embodiment of the present invention.
In FIG. 1, 1 is a human position detecting means for detecting a human position, 2 is a body surface temperature sensor for detecting a body surface temperature of a human body, 3 is an indoor temperature sensor for detecting an indoor temperature, and 4 is "comfortable". Reference numeral 9 is a microcomputer for inputting a thermal sensation such as with a switch.

The microcomputer 9 includes a CPU (central processing unit) 5 having a set temperature change amount calculation means and a set temperature change means.
And a memory 6 used for recording a program for controlling the CPU 5 and as a work area, and a memory for separately storing data from the body surface temperature sensor 2 into a human position before change and a human position after change. It has a section 7 and an interface circuit 8.

As shown in FIG. 2, the human position detecting means 1 has a human position detecting sensor 15 for detecting the presence of a human body by detecting infrared rays (including far infrared rays) emitted from the human body 18, and a shield having an opening 16a. The plate 16 has a Fresnel lens plate 17 having a plurality of Fresnel lenses (not shown) corresponding to the respective openings 16a of the shielding plate 16. The human position detection sensor 15 is a human body
A pyroelectric infrared sensor that measures the amount of infrared radiation emitted from 18 is used.

The window 16a of the shielding plate 16 is sequentially opened for a certain time by an electrochemical means such as a liquid crystal display or an electrochromic display, or a mechanical means. Then, the opened window 16a allows only infrared rays from one small area 20 of the human position monitoring area 19 to pass through and enter the human position detection sensor 15. Then, when the differential signal of the signal from the human position detection sensor 15 exceeds a predetermined value,
The human position is detected assuming that the human body is present at the position of the small area 20 corresponding to the position of the opening 16a of the shielding plate 16 at that time. At this time, the infrared rays from the respective small areas 20 are converged by the action of the Fresnel lens and enter the human position detection sensor 15 without crossing.

The body surface temperature sensor 2 is provided with the human position detecting sensor 15 and detects the amount of infrared rays emitted from the human body 18 in the human position (small area) 20 in which the human position detecting sensor 15 determines that the human body exists. . As the body surface temperature sensor 2, a pyroelectric infrared sensor or a thermopile infrared sensor that measures the amount of infrared radiation from the human body 18 is used.

The air conditioner automatic temperature setting device configured as described above operates as follows.

The air conditioner operates to control the room temperature to a preset temperature (hereinafter, simply referred to as set temperature) set by the resident. In this state, when the occupant feels "comfortable" at a certain position in the human position monitoring area 19, the switch of "comfortable" is input from the sensory input unit 4 in FIG. At that time, the human position detecting means 1 and the body surface temperature sensor 2
Scans the inside of the human position monitoring area 19 in the operating state, the body surface temperature of the occupant at the human position A (not shown) when the occupant feels "comfortable" is detected. , Its value TSA is stored in the storage unit 7.

It is assumed that the resident moves in the person position monitoring area 19 and the person position changes from the person position A to the person position B (not shown).
Then, the person position detecting means 1 indicates that the person position has changed.
Detected by. Then, the body surface temperature of the occupant at the person position B is detected by the body surface temperature sensor 2 at time t after the change of the person position is detected by the person position detecting means 1, and the value TSB is stored in the storage unit 7 as described above. It is stored separately from TSA. That is, when the occupant moves from the person position A to the person position B when the room temperatures of the person position A and the person position B are different, the body surface temperature of the occupant slowly changes and stabilizes at a certain temperature. Therefore, after detecting that the position of the person has changed, the time t which is equal to or longer than the time when the body surface temperature stabilizes
After that, the body surface temperature is detected.

Next, the change amount ΔTS of the body surface temperature due to the resident moving from the person position A to the person position B is calculated by the following equation.

ΔTS = TSA-TSB (1) Further, in order to restore the "comfort" to the thermal sensation that changes due to the change in the body surface temperature of the occupant by ΔTS, it is necessary to change the set temperature of room temperature. Therefore, the set temperature change amount calculating unit of the CPU 5 calculates the set temperature change amount ΔTSET by the following equation.

ΔTSET = a · ΔTS (2) a = constant Then, the set temperature is changed by the set temperature changing means of the CPU 5 by Δ.
Only TSET is changed. Then, the rotation speed of the compressor 11 is controlled by the inverter unit 10 (FIG. 1) based on the changed set temperature value and the detected temperature value of the indoor temperature sensor 3, and eventually the room temperature reaches the set temperature.

After that, assuming that the resident continues to stay at the person position B without moving, it is detected by scanning by the person position detecting means 1 that the person position has not changed. Then, the body surface temperature sensor 2 detects the body surface temperature of the occupant at the person position B, and the value TSB ′ is stored in the storage unit 7. Then, the set temperature change amount ΔTSET is the TSB of the equations (1) and (2).
Is calculated as TSB ′, and if ΔTSET ≠ 0, the set temperature is changed by ΔTSET. Hereafter, this operation is ΔSET = 0
Is repeated until. As a result, the body surface temperature of the occupant becomes the body surface temperature when "comfort" is felt.

The above-mentioned automatic temperature setting operation will be described with reference to the flowchart of FIG. Here, the body surface temperature of the occupant in a place where he / she already feels “comfortable” is detected and stored in the storage unit 7 (FIG. 1).
It is stored in.

In step S1, the person position is detected based on the scanning of the person position detecting means 1.

In step S2, it is determined whether or not the detected person position in step S1 has changed from the person position detected immediately before. If it changes as a result, the process proceeds to step S3, and if not, step S3 is skipped.

In step S3, it is determined whether or not the time t has elapsed after the change of the person position. As a result, if it has elapsed, the process proceeds to step S4.

In step S4, the body surface temperature of the occupant is detected by the body surface temperature sensor 2, and the value is stored in the storage unit 7.

In step S5, ΔTS, TSET is calculated from the body surface temperature value at the human position before the change and the body surface temperature value at the human position after the change stored in the storage unit 7.

In step S6, the set temperature is changed by ΔTSET calculated in step S5.

In step S7, it is determined based on the signal from the indoor temperature sensor 3 whether or not the room temperature has risen by ΔTSET. As a result, if it has risen, the process returns to step S1.

In this way, by detecting the infrared rays emitted from the human body, the human position and the body surface temperature of the human body at the human position are detected,
Since the set temperature is automatically changed based on the amount of change in the body surface temperature due to the movement of the human body, the resident always carries the switch unit for inputting the thermal sensation and inputs the thermal sensation every time the thermal sensation changes. It is not necessary and has good operability. Further, since the set temperature change amount is optimally determined based on the change amount of the body surface temperature, the temperature is constantly controlled to the optimum room temperature, and the comfort is significantly improved.

The human position detecting means in the above embodiment is configured to scan with the shielding plate 16 and the Fresnel lens plate 17, but the present invention is not limited to this, and the human position detecting sensor 15 and the body surface temperature The scanning may be performed by changing the angle or moving the position of the sensor 2.

<Effects of the Invention> As is clear from the above, the automatic temperature setting device for an air conditioner of the present invention detects the body surface temperature of the human body at the human position detected by the human position detecting means by the body surface temperature detecting sensor. Then, stored in the body surface temperature storage unit, based on the body surface temperature change amount due to the movement of the human body when the human position is changed, the set temperature change amount of room temperature is calculated by the set temperature change amount calculation means, Since the set temperature of the room temperature is automatically changed by the set temperature changing means according to the calculated change amount of the set temperature, the occupant changes the heat sensation by using the switch etc. every time the occupant moves inside the room and the heat sensation changes. There is no need to input and the operability is very good. Further, since the set temperature change amount is optimally determined based on the change amount of the body surface temperature, comfort is greatly improved.

[Brief description of drawings]

FIG. 1 is a block diagram showing an embodiment of an automatic temperature setting device for an air conditioner of the present invention, FIG. 2 is a schematic diagram of a person position detecting means in FIG. 1, and FIG. 3 is a flowchart of automatic temperature setting operation. Is. DESCRIPTION OF SYMBOLS 1 ... Person position detection means, 2 ... Body surface temperature sensor, 3 ... Indoor temperature sensor, 4 ... Sensory input part, 5 ... CPU, 7 ... Storage part, 1
5 ... Human position detection sensor, 16 ... Shielding plate, 17 ... Fresnel lens plate.

Claims (1)

[Claims] 1. A human position detecting means (1) for detecting a human position by detecting infrared rays emitted from the human body, and a body surface temperature of the human body at the human position detected by the human position detecting means (1). The body surface temperature sensor (2) for detecting and the body surface temperature of the human body detected by the body surface temperature sensor (2) when the human position detected by the human position detecting means (1) is displaced, Move according to the body surface temperature storage unit (7) that separately stores the human position before and after the change, and according to the body surface temperature before and after the change of the human position stored in the body surface temperature storage unit (7). The set temperature change amount calculating means for calculating the set temperature change amount of the room temperature based on the change amount of the body surface temperature of the human body, and the set temperature change of the room temperature according to the set temperature change amount calculated by the set temperature change amount calculating means. Setting to An automatic temperature setting device for an air conditioner, characterized by comprising temperature changing means.