JPH0432648A - Ceiling embedded type air conditioner - Google Patents

Abstract

PURPOSE:To perform an air conditioning operation not only with a relation between a set temperature and a temperature in an air conditioned region but also with a proper amount of blown air and a proper air sped by a method wherein a distance information up to a floor surface in an air conditioned region is inputted from a distance sensor installed at a peripheral part of an air blowing port and a signal for restricting a range of the number of revolutions of each of variable-speed air blowers is output. CONSTITUTION:Distance sensors 8a, 8b for sensing a distance from air blowing ports 6a, 6b to a floor surface and disposed near radiation temperature sensors 7a, 7b so as to measure a distance directed downwardly or slant downwardly. Distance sensing signals from the distance sensors 8a, 8b are inputted. The number or revolutions range restricting means K for outputting a signal for controlling a range of the number of operating revolutions of each of fans 4a, 4b to a calculation processing means C is provided. The calculation processing means C performs a calculation processing in response to signals from air conditioning temperature setting devices Sa, Sb and signal from the radiation temperature sensors 7a, 7b under a restriction of the range of number of revolutions set by the number of revolutions range restricting means K and then outputs the number of revolutions control signal for varying the number of revolutions to each of the fans 4a, 4b.

Description

[Detailed description of the invention] (Industrial application field) This invention relates to a ceiling-embedded air conditioner.

[Conventional technology]

FIG. 6 is a vertical sectional view showing a conventional ceiling-embedded air conditioner (hereinafter referred to as "ceiling air conditioner") disclosed in Japanese Patent Application Laid-Open No. 63-279046, and FIG. 7 is a bottom view of the same. It is.

In the figure, 1 is an air conditioner unit, 2 is a suction grill, and 3 is an air conditioner unit.
a, 3b are casings, 4a, 4b are variable speed blowers (hereinafter referred to as fans), 5a, 5b are heat exchangers, 6a, 6b
is an air outlet, and 7a and 7b are radiation temperature sensors.

The heat exchangers 5a and 5b are equipped with a high-temperature or low-temperature heat source device (not shown) installed inside or outside the indoor unit.
The structure is such that a high temperature or low temperature heat medium is supplied from the

The air conditioner unit 1, which constitutes the main body of a ceiling air conditioner installed on the ceiling of a building, sucks indoor air from a suction creel 2, and uses fans 4a and 4b housed in casings 3a and 3b, respectively. It is sent to the heat exchangers 5a and 5b for heat exchange and then blown into the room from the air outlets D6a and 6b. At this time, the fan 4 is
By controlling the rotational speed of a and 4b, the air volume of each is individually controlled.

FIGS. 8(I) and (II) are explanatory diagrams showing the air flow in a room when the air conditioner is in use. In the figure, 1° is a window, and 11 is an indoor heat source. Then, if the side near the indoor window 10 is defined as area A, and the opposite side is defined as area B, then in the case of FIG. 8(I),
Area A is warmer because the sun's rays are shining through window 1o, and area B is cooler because it is in the shade.

At this time, the temperature detected by the radiation temperature sensor 7a in area A is high, so if the set temperature for cooling is low, the rotation speed of the fan 4a is increased. Further, even when the set temperature during heating is high, control is performed to bring the temperature closer to the set temperature by increasing the rotation speed of the fan 4a. Similarly, if the temperature detected in area B by the radiant temperature sensor 7b is low and the set temperature during cooling is low, the rotation speed of the fan 4b is increased, and when the set temperature during heating is high, the rotation speed of the fan 4b is also increased. Control is performed to bring the temperature closer to the set temperature.

In the case of FIG. 8 (II), the area A is cold because there is no sunlight, and the area B is warm because there is an indoor heat source 11, which is the opposite situation to the case (I).

FIG. 9 is a block diagram showing the control means of the above embodiment, in which signals from the air conditioning temperature setters Sa and Sb and signals from the radiant temperature sensors 7a and 7b are inputted and subjected to comparison calculation processing to control the fan 4a. , 4b are provided with arithmetic processing means C for outputting variable speed control signals.

[Problem M that the invention seeks to solve]

Conventional air conditioners were configured as described above, so due to the difference in indoor and outdoor environments as shown in Figure 8,
Even if the temperature differs in the area or the height of the floor surface differs, simply using the calculation results of the radiant temperature and set temperature,
In order to control the air volume by controlling the rotational speed of the fans 4a and 4b at a uniform rate, at the start of air conditioning operation, or to avoid giving a draft feeling to people who are in a high position in the air conditioned space. When setting the air flow rate low, there was a problem in that the warm air did not reach the feet of people in lower positions.

This invention was made to solve the above-mentioned problems, and even when the floor height of the air-conditioned area is different, it is possible to prevent the feeling of draft to people in the air-conditioned space, and The purpose is to allow warm air to reach the feet during heating.

[Means to solve the problem]

Therefore, the ceiling-embedded air conditioner according to the present invention is a ceiling-embedded air conditioner that uses a plurality of variable speed blowers to blow air-conditioning air into the room from an outlet provided in the ceiling. a plurality of radiant temperature sensors arranged around the air outlet to detect the temperature of the air-conditioned area; and a distance sensor arranged near the radiant temperature sensors to detect the distance to the floor of the air-conditioned area. , a rotational speed range regulating means for inputting distance information from each of the distance sensors and outputting a signal regulating each rotational speed range of the blower; and each rotational speed range of the plurality of blowers from the rotational speed range regulating means. inputs a signal regulating the temperature, temperature information of the air-conditioned area from the radiant temperature sensor, and air-conditioning temperature setting information, performs arithmetic processing, and outputs a rotation speed control signal that controls each blower to an appropriate rotation speed. The above object is achieved by a configuration characterized in that the air conditioner includes a calculation processing means and controls the air blowing speed to the air-conditioned area.

[For production]

With the above configuration, the rotation speed range regulating means manually receives distance information from the distance sensor provided around the air outlet to the floor surface of the air-conditioned area, and generates a signal that regulates the rotation speed range of each variable speed blower. to appear.

The arithmetic processing means receives a signal regulating the rotation speed range of each variable speed blower from the rotation speed range regulating means and temperature information of the air-conditioned area from a plurality of radiant temperature sensors that detect the temperature of the air-conditioned area. , the air conditioning temperature setting information is manually processed and a rotation speed control signal is output to control each variable speed blower to an appropriate rotation speed, thereby controlling the rotation speed of each blower. Speed is controlled.

Then, air conditioning operation is performed with each variable speed blower set to an appropriate air volume and speed, taking into account not only the relationship between the set temperature and the temperature of the air-conditioned tilting wall, but also the distance from the ceiling to the floor.

〔Example〕

Hereinafter, a ceiling-embedded air conditioner according to the present invention will be explained using examples.

FIG. 1 is a sectional view of an embodiment of a ceiling air conditioner according to the present invention, and FIG. 2 is a bottom view of the same. Figure 3 is a bottom view showing the same embodiment installed on the indoor ceiling; Figure 4 (I);
(It) is a diagram showing the airflow in the room when the device is actually installed and used. Note that the same or equivalent parts as in the conventional example are indicated by the same reference numerals and redundant explanation will be omitted. 8a and 8b are distance sensors that detect the distance from the air outlets 6a and 6b to the floor surface, and are installed near the radiant temperature sensors 7a and 7b so as to measure the distance downward or diagonally downward. be. Note that although the distance to the floor is detected, the distance to a person or the like on the floor to be measured may also be detected. The floor of area A is a raised floor surface 12.

An air conditioner unit 1 installed on the ceiling of a building sucks indoor air through a suction grill 2, and a fan 4a housed in casings 3a and 3b.

4b, the heat is sent to each heat exchanger 5a, 5b for heat exchange, and then blown into the room from the air outlets 6a, 6b. Note that the heat exchangers 5a and 5b are configured to be supplied with a high-temperature or low-temperature heat medium from a heat source device (not shown) installed inside or outside the indoor unit 1.

FIG. 5 is a block diagram showing the control means of this embodiment. Regarding the control means block of the conventional example shown in FIG.
It has a rotation speed range regulating means K that manually outputs a signal for controlling the operating rotation speed range of the fans 4a and 4b to the arithmetic processing means C by manually inputting the distance detection signals from the distance sensors 8a and BB force, The arithmetic processing means C performs arithmetic processing based on the signals from the air conditioning temperature setters Sa and Sb and the signals from the radiant temperature sensors 7a and 7b under the regulation of the rotational speed range by the rotational speed range regulating means K, A rotation speed control signal for changing the rotation speed of the fans 4a and 4b is output.

Next, the operation in this embodiment will be explained. The air from the room sucked in by the suction creel 2 is passed through the fan 4a,
4b, the air is sent to a heat exchanger 58.degree. 5b, where it undergoes heat exchange and is blown out from outlets 6a and 6b. Distance sensors 8a and 8b detect the distance to the floor of area A and area B, and rotation speed range regulating means K detects the distance to the floor of each fan 4a.
.

Set the upper and lower limits of rotation speed of 4b. That is, when the distance from the ceiling to the floor is short, the rotation speed is set to a certain low value, and when it is far, the rotation speed is set to a certain high range. After the setting is completed, the calculation processing means C respectively radiate temperature sensor 7a,
Based on the calculation results of the temperature detected at 7b, the set temperature, and the set rotational speed operating range, the rotational speed of the fans 4a and 4b is controlled to individually control the air volume to each region.

For example, in the case of FIG. 4(I), area A is warm because the sun's rays are shining through the window 10, and area B is cold because it is in the shade. At this time, in area A, the distance from the ceiling to the floor is detected by the floor distance sensor 8a, and since the distance from the ceiling to the floor is close, the upper and lower limits of the rotation speed of the fan 4a are set to be low. Since the temperature detected by the radiant temperature sensor 7a is high, the rotation speed of the fan 4a is increased within the operating range set by the floor surface distance sensor 8a during cooling when the set temperature is lower than the set temperature. At times, the rotation speed of the fan 4a is controlled so as to approach the set temperature within the set operating range.

Similarly, in area B, the distance from the ceiling to the floor is detected by the floor distance sensor 8b, and since the distance from the ceiling to the floor is long, the upper and lower limits of the rotation speed of the fan 4b are set high.

Since the temperature detected by the radiant temperature sensor 7b is low, when the set temperature is low for cooling, the rotation speed of the fan 4b is lowered within the above set range, and when the set temperature is high for heating, the fan 4b is set higher within the set range. Increase the rotation speed of 4b and perform control to bring it closer to the set temperature.

In the case of FIG. 4 (II), heat is radiated from the window 10 in area A, and heat is heated in area B by the indoor heat source 11, as shown in FIG. 4 (I).
The temperature conditions are opposite to those in case , and the rotation speed is set low in area A and high in area B, and air conditioning is performed by controlling the rotation speed of fans 4a and 4b in the same way as above. , air outlet 6a.

The wind can be blown at a weaker wind speed in the area close to 6b, and at a higher wind speed in the area far away.

The distance sensors 8a and 8b of the above embodiments are optical sensors,
An electrostatic sensor or the like can be used, but a sound sensor may also be used.

In the case of a sound sensor, the distance sensors 8a and 8b emit different low-frequency or high-frequency sounds inaudible to humans, and depending on the magnitude of the reflected sound or the arrival time of the reflected wave, the fan 4a , 4b are set. For example, in the case of FIG. 4(I), the floor surface 20 is high in area A, so the distance from the ceiling is short, and the sound emitted from the sound sensor 8a, which is a distance sensor, is largely reflected, or the arrival time of the reflected wave is short. It detects that the distance is short by increasing the speed, and sets the rotation speed of the fan 4a to be low.
In area B, since the distance to the floor is long, the sound emitted from the sound sensor 8b is reflected to a small extent, and the fan 4b
Set the rotation speed to a high value.

Within the fan rotational speed operating range set as described above, the fan 4a is activated based on the calculation result of the temperature detected by the radiant temperature sensors 7a and 7b and the set temperature.

In order to control the rotational speed of 4b and the air volume of each, the same functions and operations as in the previous embodiment are performed.

In addition to the distance to the floor, the distance to the person on the floor may also be detected to control the rotational speed range in the same way as above. The effect is even more pronounced.

With each of the above, sufficient warm air can be sent to a floor surface that is far away during heating.

In the embodiment, the air-conditioned areas are explained as two areas A and H, but it is not limited to two areas. Appropriate multiple areas can be set depending on the conditions.

〔Effect of the invention〕

As explained above, according to the present invention, the rotation speed range regulating means inputs the distance information from the distance sensor provided around the air outlet to the floor surface of the air-conditioned area, and controls the speed of each variable speed blower. Outputs a signal that regulates the rotation speed range.

The arithmetic processing means receives a signal regulating the rotational speed range of each variable speed blower from the rotational speed range regulating means and temperature information of the air-conditioned area from the plurality of radiant temperature sensors that detect the temperature of the air-conditioned area. , the air conditioning temperature setting information is manually processed and a rotation speed control signal is output to control each variable speed blower to an appropriate rotation speed, so the rotation speed of each variable speed blower is controlled. Air-conditioning operation can be performed at an appropriate air volume and speed for each variable speed blower, taking into account not only the relationship with the temperature of the area but also the distance from the ceiling to the floor.

That is, it does not give an unpleasant feeling of draft to people who are relatively close to the air outlet, and the conditioned air can reach the floor surface far from the air outlet.
To provide a ceiling-embedded air conditioner capable of controlling the air flow rate and blowing speed to an appropriate level even when starting air conditioning operation or when there are areas of different heights in a room, and providing a comfortable air-conditioned area. I can do it.

[Brief explanation of the drawing]

Fig. 1 is a sectional view of an embodiment of the ceiling-mounted air conditioner according to the present invention, Fig. 2 is a bottom view of the same, Fig. 3 is a bottom view of the embodiment installed on the ceiling, and Fig. Figures (I) and (II) are explanatory diagrams showing the indoor airflow in the usage state of the same example (I
) indicates daytime, and (■) indicates nighttime. FIG. 5 is a block diagram of the control means of the same embodiment, FIG. 6 is a sectional view of a conventional ceiling-mounted air conditioner, FIG. 7 is a bottom view of the same, and FIG. 8 (1). (II) is an explanatory diagram showing indoor airflow in a conventional example in use, where (I) shows daytime and (■) shows nighttime. FIG. 9 is a block diagram of the control means of the conventional example. A and B are air conditioned areas, C is an arithmetic processing means, K is a rotation speed range regulating means, Sa and Sb are air conditioning temperature setters, 1 is an air conditioner unit, 2 is a suction grill, 4 is a variable speed blower, 6a,
6b is an air outlet, and 7a. 7b is a radiation temperature sensor, and 8a and 8b are distance sensors. In the figures, the same reference numerals indicate the same or corresponding parts.

Claims (1)

[Claims] A ceiling-embedded air conditioner that uses a plurality of variable speed blowers to blow air-conditioning air into the room from an outlet provided in the ceiling, the air conditioner being equipped around the air outlet to detect the temperature of the air-conditioned area. a plurality of radiant temperature sensors, a distance sensor provided near the radiant temperature sensors to detect the distance to the floor of the air-conditioned area, and distance information from each distance sensor inputted to determine each rotation speed range of the blower. a rotational speed range regulating means for outputting a signal regulating the rotational speed range, and a signal regulating each rotational speed range of the plurality of blowers from the rotational speed range regulating means;
A calculation processing means inputs temperature information of the air-conditioned area from the radiant temperature sensor and air conditioning temperature setting information, performs calculation processing, and outputs a rotation speed control signal for controlling each of the blowers to an appropriate rotation speed. A ceiling-mounted air conditioner characterized by controlling the air blowing speed to an air-conditioned area.