JPH04369336A - Controlling device for operating air conditioningapparatus - Google Patents

Abstract

PURPOSE:To improve the control accuracy of air conditioning based upon detected temperature by a radiation sensor and prevent the radiation sensor from being affected by heat. CONSTITUTION:There are provided an air-conditioning unit 14, a composite sensor 7 including therein a contamination sensor 73 for detecting the contamination of indoor air and a radiation sensor 74 for detecting indoor radiation temperature, and a temperature sensor 23 for detecting indoor temperature. There are further provided correction means 52 for outputting a correction temperature signal corrected to be lower by predetermined temperature by detected temperature by the radiation sensor 74 and signal switching means 53 for receiving a correction temperature signal from the correction means 52 and a detected temperature signal from the temperature sensor 23 and a corrected temperature signal signal from the correcting means 52 until a predetermined air conditioning condition from starting time is attained, and further outputting a detected temperature signal from the temperature sensor 23 once the predetermined air-conditioning condition is attained. There is still further provided air-conditioning controlling means 51 for controlling the air-conditioning unit 14 such that indoor temperature gets set temperature.

Description

[Detailed description of the invention]

0001

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an operation control device for an air conditioner equipped with a composite sensor including a dirt sensor and a radiation sensor, and more particularly to measures against thermal fluctuations in the radiation sensor.

0002

[Prior Art] Generally, air conditioners are equipped with
As disclosed in Japanese Patent No. 116348, some indoor units are provided with a suction temperature sensor that detects the temperature of the suction air and a radiation sensor that detects the radiant temperature from the floor surface or the like. Then, the set temperature is corrected based on the radiant temperature detected by the radiation sensor, and the operation of the indoor unit is controlled to reach the corrected set temperature, thereby providing comfortable air conditioning.

0003

[Problems to be Solved by the Invention] In recent years, it has been proposed that the above-mentioned air conditioner be equipped with a ventilation function by detecting dirt in the indoor air. that time,
In addition to the radiation sensor described above, a dirt sensor is provided to detect dirt in the indoor air, and it is being considered to package the dirt sensor and the radiation sensor into one package to facilitate handling.

However, if the dirt sensor and the radiation sensor are simply housed in one casing, the radiation sensor will be affected by heat generated by the dirt sensor and the control board, and the detected temperature will be higher than the actual radiation temperature. However, there was a problem in that precise control could not be performed.

[0005] The present invention has been made in view of the above points, and aims to improve the accuracy of air conditioning control based on the temperature detected by the radiation sensor, and to make the radiation sensor less susceptible to thermal effects. be.

[0006]

[Means for Solving the Problems] In order to achieve the above object, the means taken by the present invention corrects the temperature signal detected by the radiation sensor, and also provides a partition between the radiation sensor and the dirt sensor. A board was installed.

Specifically, as shown in FIG. 1, the means taken by the invention according to claim 1 first include an air conditioning unit (14) that generates conditioned air and blows the conditioned air indoors; A composite sensor (7) that includes a dirt sensor (73) that detects air pollution and a radiation sensor (74) that detects indoor radiant temperature, and a temperature sensor (23) that detects indoor temperature.
The composite sensor (7) and the temperature sensor (
Based on the detection signal from the air conditioning unit (1)
4) The target is an operation control device for an air conditioner that controls the operation.

A correction means (52) is provided for receiving the temperature signal detected by the radiation sensor (74) and outputting a corrected temperature signal corrected to be lower than the temperature detected by the radiation sensor (74) by a predetermined temperature. There is. Furthermore, the correction means (5
In response to the corrected temperature signal of 2) and the detected temperature signal of the temperature sensor (23), the corrected temperature signal of the correcting means (52) is output from the time of startup until the predetermined air conditioning condition is reached. Then, a signal switching means (53) is provided for outputting a temperature signal detected by the temperature sensor (23). In addition, upon receiving the output signal of the signal switching means (53), the air conditioning unit (1) is operated so that the indoor temperature reaches the set temperature.
4) is provided with an air conditioning control means (51).

Further, the means taken by the invention according to claim 2 is that in the invention according to claim 1, the composite sensor (7)
A control board (72) is provided in the casing (71), and a dirt sensor (73) is provided in the casing (71).
) and the radiation sensor (74) are provided with a partition plate (76).

0010

[Operation] With the above configuration, in the invention according to claim 1,
While the temperature sensor (23) detects the indoor temperature, the dirt sensor (73) of the composite sensor (7) detects the dirt in the indoor air, and the radiation sensor (74) detects the indoor radiant temperature, e.g.
The radiant temperature of the floor is detected.

[0011] In the composite sensor (7), in the invention according to claim 2, a partition plate (76) is provided between the radiation sensor (74) and the dirt sensor (73), so that the radiation The sensor (74) is not easily affected by the heat generated by the dirt sensor (73) and detects the radiant temperature with high accuracy.

On the other hand, the temperature signal detected by the radiation sensor (74) is input to the correction means (52).
subtracts a predetermined temperature from the temperature detected by the radiation sensor (74) and outputs a corrected temperature signal. Furthermore, the corrected temperature signal of the correction means (52) and the detected temperature signal of the temperature sensor (23) are input to the signal switching means (53), and the signal switching means (53) adjusts the predetermined air conditioning conditions from the time of startup. For example, the corrected temperature signal of the correction means (52) is outputted until the indoor temperature rises close to the set temperature, and when the indoor temperature rises close to the set temperature, the detected temperature signal of the temperature sensor (23) is outputted. I will do it.

[0013] In response to the output signal of the signal switching means (53), the air conditioning control means (51) controls the operation of the air conditioning unit (14) so that the indoor temperature reaches the set temperature.

[0014]

[Effect of the invention] Therefore, according to the invention according to claim 1,
Since the temperature signal detected by the radiation sensor (74) is corrected by the correction means (52), air conditioning operation can be performed with high accuracy based on the temperature signal detected by the radiation sensor (74). Air conditioning is available.

Furthermore, since the radiation sensor (74) and the dirt sensor (73) can be integrated, the installation and other handling of the sensors can be facilitated, and compared to the case where each sensor is provided separately. and can be made inexpensive.

Further, according to the invention according to claim 2, since the partition plate (76) is provided between the radiation sensor (74) and the dirt sensor (73), the radiation sensor can be removed from the dirt sensor (73). (74), the radiation sensor (74) can suppress the heat transfer to the dirt sensor (73).
It is possible to reduce the thermal influence of the radiation sensor (74), improve the detection accuracy of the radiation sensor (74), and perform air conditioning operation with higher accuracy.

[0017]

Embodiments Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings.

As shown in FIG. 2, (1) is an air conditioner that employs a VAV system (Variable Air Volume System), which adjusts the indoor temperature by changing the amount of air blown into the room. The room is air conditioned to maintain the set temperature.

The air conditioner (1) includes an indoor unit (2) connected to an outdoor unit (not shown), and a duct (11) is connected to the indoor unit (2). The indoor unit (2) is equipped with an indoor heat exchanger (
21) and an indoor fan (22) are housed, the indoor heat exchanger (21) is connected to the outdoor unit, and between the indoor unit (2) and the outdoor unit there is a A refrigerant circuit is formed, and the indoor unit (
2) is generating cold air or hot air.

Furthermore, a VAV (Variable Air Volume) unit (3) is connected to the duct (11), and the VAV unit (3) houses a damper (31). ) rotates the motor (3
2) is housed therein, and the amount of air blown out is controlled by the rotation of the damper (31), so that the indoor temperature becomes the set temperature. And the above VAV unit (
3) is connected to one end of a duct (12), and the other end of the duct (12) is connected to an air outlet chamber (13), through which cold air etc. generated by the indoor unit (2) is connected. The conditioned air is supplied to the VAV unit (3) and both ducts (
11) and (12) into the room from the outlet chamber (13), and the indoor unit (2) and the VAV
The unit (3) constitutes an air conditioning unit (14).

[0021] Also, the indoor unit (2) and the VAV
The unit (3) is provided with control units (4) and (5), and the indoor unit (2) is equipped with a suction temperature sensor (23) that is a temperature sensor that detects the suction air temperature.
and a blowout temperature sensor (24) for detecting the blowout air temperature, and detection signals from both temperature sensors (23) and (24) are input to the control unit (4). on the other hand,
The VAV unit (3) is provided with a speed sensor (33), and a detection signal from the speed sensor (33) is input to the control unit (5).

Furthermore, the control unit (5) of the VAV unit (3) is connected to a remote control (6), and
A composite sensor (7) is connected to the control unit (
5) and the control unit (5) of the indoor unit (2) are connected so that control signals can be exchanged. The remote controller (6) is configured to be able to input air-conditioning/heating operation signals, set temperature signals, and the like.

As shown in FIGS. 3 and 4, the composite sensor (7) includes a dirt sensor (73) inside the casing (71).
) and a radiation sensor (74) are housed therein, as well as a control board (72), which detects both indoor air pollution and indoor radiant temperature. The casing (
71) is a rectangular casing body (
A front panel (71b) is attached to the lower surface of the casing body (71a), and a through hole (71c) for a lead wire is bored in the upper surface plate of the casing body (71a). Then, the casing body (71a) is inserted into the ceiling (15), and the composite sensor (7) is attached to the ceiling (15),
Indoor air flows into the casing body (71a) from the lower part of the casing body (71a), that is, the gap between the front panel (71b) and the ceiling (15), and the inflow air flows through the lead wire through-hole. (71c).

The control board (72) is located at the upper part of the casing body (71a) and attached to the casing (71), and is equipped with a power regulator (75) and various chips mounted thereon. Microcomputer (78)
is configured.

In FIG. 3, the dirt sensor (73) is located on the right side of the casing body (71a) and is attached to the casing (71).
Detects dirt in the indoor air from the indoor air flowing into the room,
The detection signal is sent to the control unit (
5) is output.

The radiation sensor (74) is located on the left side of the casing body (71a) and attached to the casing (71) in FIG. is output to the control unit (5) of the VAV unit (3).

Furthermore, as one of the features of the present invention, the casing (71) is provided with a partition plate (76) that partitions the dirt sensor (73) and the composite sensor (7). The partition plate (76) has a height equal to that of the front panel (71b).
and the control board (72), and the width direction is provided on both sides of the radiation sensor (74) to suppress heat transfer due to the heat generated by the dirt sensor (73) to the radiation sensor (74). I try to do that.

A changeover switch (77) is attached to the radiation sensor (74), and a room temperature sensor attachment member (79) is attached to the casing body (71a). The changeover switch (77) is configured to switch between using the temperature signal detected by the radiation sensor (74) and using the temperature signal detected by a room temperature sensor (not shown). That is, the above-mentioned composite sensor (7) is attached to the ceiling (15) as in this embodiment, and the radiation sensor (
74) and when using the detected temperature signal of the composite sensor (
7) is mounted on the side wall of the room, a room temperature sensor is provided on the mounting member (79), and the temperature signal detected by the room temperature sensor is used for switching.In response to this switching signal, the microcomputer (78) sets the switch bit to 1 when using the radiation sensor (74), resets the switch bit to 0 when using the above-mentioned room temperature sensor, and sends this switch bit along with the transmission data to the above-mentioned V
The information is transmitted to the control unit (5) of the AV unit (3) once every second.

Further, the control unit (5) of the VAV unit (3) has an air conditioning control means (51), a correction means (52), and a signal switching means (53) during heating operation, as a feature of the present invention. is provided to control the rotation of the damper (31) so that the indoor temperature reaches the set temperature.

The correction means (52) includes a radiation sensor (7).
In response to the detected temperature signal of 4), the detected temperature of the radiation sensor (74) is corrected, and specifically, by adding -4.3°C, the corrected temperature lower than the detected temperature of the radiation sensor (74) is adjusted to the above signal. It is output to the switching means (53).

The signal switching means (53) receives the detected temperature signal from the suction temperature sensor (23) and the corrected temperature signal from the correcting means (52), and changes either the suction air temperature or the corrected temperature to predetermined air conditioning conditions. The air conditioner is configured to be outputted to the air conditioning control means (51). Specifically, the signal switching means (53) switches the correction means until the intake air temperature Ta becomes 1° C. lower than the set temperature Ts (Ta≦Ts-1) or for a maximum of 1 hour from the time of startup. (52) outputs the correction temperature of the radiation temperature, and when the suction air temperature Ta becomes higher than the temperature 1°C lower than the set temperature Ts (Ta>T
s-1) or after a maximum of one hour has elapsed from the time of startup, the suction temperature sensor (23) is configured to output the suction air temperature.

The air conditioning control means (51) receives the output signal from the signal switching means (53) and controls the damper (31) to rotate so that the indoor temperature reaches the set temperature. When the indoor temperature is low, the opening degree of the damper (31) is increased to increase the amount of air blown from the outlet chamber (13), while when the indoor temperature is high, the damper (31) is increased in opening degree.
) is configured to reduce the amount of air blown out from the outlet chamber (13).

The basic reason why the temperature detected by the radiation sensor (74) is corrected will now be explained.

FIG. 4 shows changes in floor temperature, etc. at the initial stage of operation during heating operation. In this FIG. 4, the solid line A is the change characteristic of the bed temperature, and the thin line B
is the change characteristic of the indoor air temperature detected by the thermistor installed on the ceiling (15), and increases according to the heating operation time.

On the other hand, the two-dot chain line C indicates a single composite sensor (
7) is the change characteristic of the radiant temperature of the floor detected by installing it on the ceiling 1.5 m above the floor, and detects the actual floor temperature at the beginning of the heating operation. Therefore, in the early stages of heating, the radiant temperature has a large influence on the occupants.
It is preferable to control the air conditioning based on the radiant temperature.

On the other hand, the dashed line D is 1.5
This is a change characteristic of the radiation temperature of the floor surface detected by the radiation sensor (74) of the composite sensor (7) of the present invention installed on the ceiling above m, and the detected temperature is a predetermined temperature higher than the actual floor temperature. This is because, as mentioned above, the radiation sensor (74) and the dirt sensor (73) are integrated into a composite sensor (7), so even if the partition plate (76) is provided, the dirt sensor (73)
This is because the temperature is affected by heat generation such as heat generation, etc. Therefore, when the radiant temperature is used, the correction means (52) is used to correct it.

Furthermore, as the indoor air temperature rises, the influence of radiation temperature on the occupants decreases, so the air conditioning is controlled based on the temperature detected by the suction temperature sensor (23).

[0038] Furthermore, the air conditioning control means (51) receives the detection signal from the dirt sensor (73) and determines whether ventilation is necessary or not, and if ventilation is necessary, increases the amount of blown air. , not shown, is configured to increase the amount of outside air taken in to ventilate the room. At this time, since the amount of blown air is increased, in order to keep the air conditioning capacity constant, the blown air temperature detected by the blown air temperature sensor (24) is shifted, and while the blown air temperature is increased during cooling, the blown air temperature is increased during heating. It is designed to reduce the temperature of the blowing air.

Next, the air conditioning control operation during heating of the air conditioner will be explained.

First, the indoor fan (
22), the indoor unit (2) sucks in indoor air, exchanges heat with the indoor heat exchanger (21), and generates warm air. This warm air passes through the duct (11), passes through the VAV unit (3), passes through the duct (12), and is blown into the room from the outlet chamber (13). The amount of air blown into the room is controlled by the opening degree of the damper (31).

On the other hand, the set indoor temperature is input from the remote control (6), the radiation sensor (74) measures the radiant temperature of the floor, and the suction temperature sensor (23) measures the temperature of the indoor unit (2).
Detect the intake air temperature, that is, the indoor temperature, respectively,
A dirt sensor (73) detects dirt in the indoor air.

Furthermore, the detected temperature signal of the radiation sensor (74) and the detected signal of the dirt sensor (73) are sent to the control unit (5) of the VAV unit (3), and the detected temperature signal of the blowout temperature sensor (24) is sent to the control unit (5) of the VAV unit (3). is input to the control unit (5) of the VAV unit (3) via the control unit (4) of the indoor unit (2). Then, the temperature signal detected by the radiation sensor (74) is corrected by the correction means (52), and specifically, by subtracting -4.3°C from the detected temperature, the correction means (52) outputs a corrected temperature signal. Output.

Thereafter, the signal switching means (53) receives the corrected temperature signal of the correcting means (52) and the detected temperature signal of the outlet temperature sensor (24), and upon startup, the corrected temperature signal of the correcting means (52) is received by the signal switching means (53).
The corrected temperature signal of 52) is output to the air conditioning control means (51). Then, the signal switching means (53) operates until the suction air temperature Ta becomes 1° C. lower than the set temperature Ts (Ta
≦Ts-1) or for a maximum of 1 hour from the time of startup, the correction means (52) outputs a correction temperature signal, and the air conditioning control means (52)
1) is to control the rotation of the damper (31) so that the corrected radiation temperature becomes the set temperature.

The signal switching means (53) also controls the signal switching means (53) when the suction air temperature Ta becomes higher than a temperature lower by 1° C. than the set temperature Ts (Ta>Ts-1), or at a maximum of 1°C from the time of startup.
When the time elapses, the suction temperature sensor (23) outputs the suction air temperature, and the air conditioning control means (51) controls the damper (31) so that the suction air temperature reaches the set temperature.

The air conditioning control means (51) increases the amount of blown air and the amount of outside air taken in when ventilation is required based on the detection signal of the dirt sensor (73).

Therefore, since the temperature signal detected by the radiation sensor (74) is corrected by the correction means (52), the air conditioning operation can be performed accurately based on the temperature signal detected by the radiation sensor (74). This allows for comfortable air conditioning.

Furthermore, since the radiation sensor (74) and the dirt sensor (73) can be integrated, it is possible to facilitate the installation and handling of the sensors, and it is also easier to handle than when each sensor is provided separately. and can be made inexpensive.

Furthermore, since the partition plate (76) is provided between the radiation sensor (74) and the dirt sensor (73), heat transfer from the dirt sensor (73) to the radiation sensor (74) is suppressed. Since the radiation sensor (74
) can be reduced from being affected by the heat of the dirt sensor (73), the detection accuracy of the radiation sensor (74) can be improved, and air conditioning operation can be performed with higher accuracy.

[0049] Although this embodiment has been described for heating, it can also be applied to the case where radiant temperature is used during cooling.

Furthermore, the present invention is not limited to an air conditioner equipped with a VAV unit (3).

Furthermore, the switching conditions of the signal switching means (53) are not limited to those in the embodiment, and it goes without saying that switching may be performed under other conditions.

[Brief explanation of drawings]

FIG. 1 is a block diagram showing the configuration of the present invention.

FIG. 2 is a schematic diagram showing the overall configuration of an air conditioner.

FIG. 3 is a longitudinal cross-sectional view of the composite sensor.

FIG. 4 is a sectional view taken along line XX in FIG. 3;

FIG. 5 is a characteristic diagram of floor temperature, radiant temperature, and room temperature.

[Explanation of symbols]

1 Air conditioner 2 Indoor unit 3 VAV unit 4,5 Control unit 7 Composite sensor 14 Air conditioning unit 51 Air conditioning control means 52 Correction means 53 Signal switching means 71 Casing 72 Control board 73 Dirt sensor 74 Radiation sensor 76 Partition plate

Claims (2)

[Claims] 1. An air conditioning unit (14) that generates conditioned air and blows the conditioned air indoors, a dirt sensor (73) that detects dirt in the indoor air, and a radiation sensor (74) that detects indoor radiant temperature. ) with a built-in composite sensor (7),
operation of an air conditioner that is equipped with a temperature sensor (23) that detects indoor temperature and controls the operation of the air conditioning unit (14) based on detection signals from the composite sensor (7) and the temperature sensor (23); The control device includes a correction means (52) for receiving a temperature signal detected by the radiation sensor (74) and outputting a corrected temperature signal corrected to be lower by a predetermined temperature than the temperature detected by the radiation sensor (74); Correction means (
In response to the corrected temperature signal of 52) and the detected temperature signal of the temperature sensor (23), the corrected temperature signal of the correcting means (52) is output from the time of startup until a predetermined air conditioning condition is reached;
A signal switching means (53) that outputs a temperature signal detected by the temperature sensor (23) when a predetermined air conditioning condition is reached, and a signal switching means (53) that receives the output signal of the signal switching means (53) so that the indoor temperature becomes the set temperature. An operation control device for an air conditioner, comprising: an air conditioning control means (51) for controlling an air conditioning unit (14). 2. The operation control device for an air conditioner according to claim 1, wherein the composite sensor (7) is arranged in a casing (7).
1), a control board (72) is provided in the casing (71), and a dirt sensor (73) and a radiation sensor (7) are provided in the casing (71).
4) An operation control device for an air conditioner, characterized in that a partition plate (76) is provided between the device and the device.