JPS63701B2 - - Google Patents

Description

[Detailed Description of the Invention] (Industrial Application Field) The present invention controls the indoor environment in a perimeter area, which is the outer periphery of a room, especially in a large office building, etc., in order to prevent mixing loss in an air conditioning system. Regarding the optimal control method for

(Prior art) In recent years, with the systemization of architecture in office buildings of medium or larger size, air conditioning equipment has also been systemized. There are many cases in which different air conditioning systems are adopted for the interior area I, which is the core area. For example, in the perimeter area P, a fan coil unit 1 is used, and in the interior area I, a normal ceiling air outlet 2 is used.

In this case, in the winter, the fan coil unit 1 supplies hot air (for example, 35°C) with a heat amount commensurate with the heat transfer loss from the outer wall of the building, window glass 3, etc. to the perimeter area P; In the continuous interior area I, indoor lighting, occupants,
There is heat generated indoors by office equipment, etc., and it is necessary to supply cold heat even in winter, and since cold air (for example, 16 to 18 °C) is supplied from the air outlet 2, each space is controlled separately in one continuous space. Two heat supply systems will coexist.

By the way, in order to increase the comfort level of the perimeter area P, the temperature θ _P (°C) of the perimeter area P is set higher than the temperature θ _I (°C) of the interior area I.

However, the perimeter area P and the interior area I
As shown in the figure, airflow or air mixing occurs in both areas P and I, and the supplied cold and hot heat interfere with each other, increasing the heat load in both areas P and I, respectively. As a result, mixing heat loss of indoor air occurred, more cold and hot air was supplied than necessary, and energy was wasted.

Here, the higher the set temperature of the perimeter area P compared to that of the interior area I, the greater the mixing loss will be, and conversely, the lower the set temperature of the perimeter area P, the greater the loss will be prevented. The lower the temperature, the better in terms of energy, but in winter, it is natural that the outer walls and window glass 3
Since the surface temperature of the surrounding area becomes low, the peripheral area P receives strong cold radiation, and the floor surface and the vicinity of the floor are likely to be cooled due to the occurrence of cold draft. In this way, since the feeling of cooling is further promoted in the perimeter area P, the conventional idea has been to set the set temperature higher than in the interior area I to maintain a constant level of comfort.

For this reason, the difference in set temperature between the perimeter area P and the interior area I has a very large effect on the mixing loss, but simply setting the set temperature of the perimeter area P to be the same or lower than that of the interior area I is not enough as mentioned above. This poses an environmental problem, and conversely, raising the temperature also poses the problem of significantly increasing mixing loss as described above.

By the way, although the purpose is not to prevent mixing loss in an air conditioning system, and the configuration, function, and effect for that purpose are different, the technique of providing a radiant panel on the front of the fan coil unit 1 is shown in Figure 3 a. As shown in FIG.
52-13151), but both require a separate electrical panel 4 and heat exchanger 5, making installation cumbersome and expensive, and there is also a large risk of wire breakage and water leakage. There is.

(Objective of the Invention) An object of the present invention is to prevent the mixing loss of cold and hot heat supplied in the perimeter area and interior area of a building, and to maintain the comfort of the indoor environment.

(Structure of the Invention) For this reason, the present invention controls the set temperature of the perimeter area to be approximately the same as or lower than the set temperature of the interior area during heating, while providing a fan coil unit in front of the perimeter area. The surface temperature of the radiant panel is controlled to be higher than the set temperature of the perimeter area.

In other words, the problem of mixing loss can be improved by controlling the set temperature in the perimeter area to be approximately the same as or lower than the set temperature in the interior area, while the environmental problem can be solved by controlling the surface temperature of the fan coil unit's radiant panel. By controlling the temperature to be higher than the set temperature in the perimeter area, heat radiation is strengthened, promoting a feeling of heat and improving comfort.

(Effects of the Invention) According to the present invention, since the set temperature of the interior area is equal to or lower than the set temperature of the perimeter area, it is possible to improve the mixing loss and save energy. Since the heat radiation from the unit is stronger (higher) than the set temperature of the perimeter area, the deterioration of the thermal environment caused by lowering the set temperature of the perimeter area is improved, and the degree of comfort is improved.

(Embodiment) As shown in FIGS. 2, 4a, and 5, the fan coil unit 20 arranged along the outer wall of the perimeter area P and the window glass 3 has a unit main body 21 in the shape of an oblong square box. The inside of the main body 21 is partitioned into upper and lower chambers 24 and 25 by an intermediate partition plate 22 provided in the middle in the vertical direction, leaving a cold air passage 23 on the front side and a bypass passage 28 on the rear side. A blower (fan) 26 is disposed in the chamber 24, and a heat exchanger (coil) 2 is disposed in the lower chamber 25.
7 is placed.

The upper part of the upper chamber 24 is partitioned by an upper partition plate 32 between an upper surface 30 in which a blower outlet 29 is formed and a discharge outlet 31 of the blower 26 .

Further, the rear portions of the upper and lower chambers 24 and 25 are connected to a rear surface 33.
A bypass passage 28 is formed by partitioning with a rear partition plate 34 between the upper chamber 24 and a bypass damper 35 for controlling the blowout temperature.

Furthermore, the front portions of the upper and lower chambers 24 and 25 are connected to the front surface 3.
6 and is partitioned by a front heat insulating material 37 between the front side 36
A hot air passage 38 is formed between the intermediate partition plate 22 and a cold air passage 23 between the intermediate partition plate 22 and the intermediate partition plate 22 . The front surface 36 is made of a metal material or the like with good heat radiation, and functions as a radiant panel.
The front heat insulating material 37 is provided with a passage switching damper 39 corresponding to the lower chamber 25 that switches the lower chamber 25 into the cold air passage 23 and the hot air passage 38 (see FIG. 3b). Note that 40 is a lower partition plate, and 41 is a drain pan.

Suction ports 42 and 4 are provided at the bottom of the front surface 36 of the main body.
2 is formed, and the rotation of the blower 26 opens the suction port 4.
The indoor air sucked from 2 passes through the bypass passage 28
Flow path switching damper 39 via heat exchanger 27 from the side
By manual or automatic switching, the air is blown into the room from the air outlet 29 via the blower 26.

Thus, if the fan coil unit 20 is configured as described above, during heating, the flow path switching damper 39 closes the cold air passage 23 and opens the hot air passage 38.

Then, the indoor air (warm air) heated by the heat exchanger 27 passes through the hot air passage 38, so that it reaches the blower 26 while heating the front surface (radiation panel) 36.

Therefore, radiant heat is radiated from the front surface (radiation panel) 36 to the perimeter area P.

For example, if the hot water in the heat exchanger 27 is 60°C,
The warm air coming out of the heat exchanger 27 is heated to around 50℃, and the front (radiation panel) 36 is heated to 40℃ by this hot air.
The air is heated to ~50°C, and hot air of around 30°C is blown out from the air outlet 31 by adjusting the opening degree of the bypass damper 35.

This warm air blown into the perimeter area P is approximately 21 to
22℃ and convection, while normal air outlet 2
Cold air blown from the interior area I (16 to 18
℃) becomes approximately 22℃ due to the influence of the heat generated indoors, and convection occurs.As shown in Figure 2, even if the air currents or air in both areas P and I mix, the air temperature in both areas is the same. Heat loss due to mixing is eliminated. Further, even if there is a difference in air temperature between the two zones, each air is close to the set temperature of both zones, and even when mixed, the air acts in a direction to handle the heat load of each zone, resulting in a heat gain due to mixing.

In addition, the cold radiation from the outer wall, window glass 3, etc. is
6, the cold sensation is significantly alleviated and a warm sensation is generated, improving comfort without having to set the perimeter temperature as high as in the past.

Figure 6 shows data showing the relationship between environmental conditions and clothing surface temperature when working in an office with a comfortable thermal environment. It feels comfortable when the surface temperature of clothing is in the range of approximately 27 to 28 degrees Celsius, taking into consideration the workability of the place [interior area I, the surface temperature of clothing is a constant temperature d (27.46
℃)], the temperature of the radiant panel 36 is the same as room temperature a (22℃→same as the conventional method without the radiant panel)
In this case, the comfort zone will not be reached unless you are at least 4 to 5 meters away from the window, but the radiant panel 36 is at temperature B (40℃).
, even if you are 1m from the window, it is still within the comfortable range.
Conversely, when the temperature is C (70℃), it becomes a little too hot up to 1m from the window, and it becomes comfortable from 2m.

On the other hand, during cooling, the flow path switching damper 39 closes the hot air passage 38 and opens the cold air passage 23.

Then, the indoor air (cold air) whose temperature has been lowered by the heat exchanger 27 reaches the blower 26 through the cold air passage 23. In this case, the cold air is sent to the hot air passage 38.
Since the radiation does not pass through the air, the front surface (radiation panel) 36 will not be unnecessarily cooled and no condensation will occur. Moreover, the hot air passage 3 between the radiant panel 36 and the front heat insulating material 37
8 becomes a retained air layer and also functions as a heat insulating layer.

Further, the fan coil unit 20 can also be controlled as follows.

When there is little variation in the heating load, the difference between the temperature of the air blown from the fan coil unit 20 and the set room temperature is small, so if the amount of air blown is kept constant, the temperature of the air blown can be controlled by controlling the amount of hot water. As a result, the surface temperature of the radiant panel also fluctuates following the control of the air temperature.

By the way, the composition ratio of radiation and convection components in the thermal environment of a living room is considered to be almost constant regardless of changes in the load (50% for convection, 50% for radiation).
%), by controlling the indoor air temperature as before,
The surface temperature of the panel, which easily becomes a radiant component, can also be controlled.

In other words, in a conventional fan coil unit with an electric heater attached to the front panel, the radiation system and convection system are parallel and have no mutual relationship with each other. It is necessary to detect the blowout temperature of the convective component using a separate thermometer and to control the radiant component via a control converter, which increases costs.

In contrast, the proposed fan coil unit 20
Now, the radiation system and the convection system are connected in series and each has its own interrelationship, so if you control the convection component with a room temperature detection thermometer, the radiation component will also be automatically controlled, so you can use another sensor to control the convection component. There is no need for converters or control converters.

[Brief explanation of the drawing]

Fig. 1 is a side view showing a conventional air conditioning system, Fig. 2 is a side view showing an air conditioning system according to the present invention, Figs. 3 and 4 are sectional views of a conventional fan coil unit, and Fig. 5 a is a sectional view of the fan coil unit during heating according to the present invention, FIG. 5 b
Figure 6 is a cross-sectional view of the fan coil unit during cooling.
The figure is a plan view of FIG. 5a, and FIG. 7 is a graph showing the relationship between environmental conditions and the surface temperature of clothing. 20... Fan coil unit, 21... Unit main body, 22... Intermediate partition plate, 23... Cold air passage, 26... Blower, 27... Heat exchanger, 28
... Bypass passage, 29 ... Air outlet, 35 ... Bypass damper, 36 ... Front (radiation panel), 3
7...Front heat insulating material, 38...Hot air passage, 39...Flow path switching damper, 42...Suction port, P...Perimeter area, I...Interior area.

Claims (1)

[Claims] 1. In a device that employs different air conditioning systems for a perimeter area, which is the outer periphery of the room, and an interior area, which is the core part of the room, during heating, the set temperature of the perimeter area is set to the set temperature of the interior area. An air conditioning system characterized in that the surface temperature of a radiant panel provided in front of the fan coil unit in the perimeter area is controlled to be higher than the set temperature of the perimeter area, while controlling the temperature to be approximately the same as or lower than the temperature. Method for preventing mixing loss in.