JP4294784B2 - Air conditioning equipment and air conditioning method - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention is suitable for applications in which the air velocity is restricted, and has a great advantage when applied to a large space. In addition, a space that requires air conditioning (occupant's living area for interpersonal air conditioning, various experiments, tests, The present invention relates to an air-conditioning facility that performs energy-saving to ensure a uniform temperature distribution in an area that maintains the desired physical properties of an object to be processed in a production process, and an air-conditioning method that uses the air-conditioning facility.
[0002]
[Prior art]
In order to prevent operating and equipment costs from rising, large-scale air-conditioning equipment is required in space, such as halls and exhibition facilities, where there are people, factories and research facilities, such as production equipment, experimental equipment, raw materials, It is desirable to air-condition only other samples to a predetermined temperature.
Therefore, conventionally, for example, the upper layer space and the lower layer space are partitioned by a jet stream from a horizontal duct to prevent mixing of the air in both spaces (Japanese Patent No. 2791137), and in the factory, a duct connected to an air conditioner is blown. Set the outlet at the wall-side intermediate height and install the suction port on the floor (Japanese Patent Laid-Open No. 4-257652). Use a vertically long fan coil unit with a special structure. Providing and adjusting the air volume of both with an air volume adjusting mechanism has been proposed (Japanese Patent Laid-Open No. 10-246457).
[0003]
[Problems to be solved by the invention]
However, the conventional technology has a problem that the atmosphere of the room is greatly disturbed for air conditioning such as an environmental test room that reproduces a process using a laser length measuring instrument or no wind in a precision machine factory, for example. Also, interpersonal air conditioning is not preferable because it gives the resident a draft feeling. Furthermore, these technologies use a large number of fan units and high static pressure nozzles, resulting in high power consumption and high operating costs, and these devices and instruments are installed on a relatively high ceiling. Therefore, maintenance is also difficult.
[0004]
In order to improve these points, the inventors paid attention to so-called replacement ventilation, which saves energy by supplying conditioned air with a small air volume and a low air speed. For example, Japanese Laid-Open Patent Publication No. 4-143538 proposes to supply an airflow having the above-mentioned property slightly lower in temperature than room air to the lower space of the room. If this technology is developed, the conventional problems are considered to be improved.
However, since JP-A-4-143538 assumes cooling operation, there is a point to be improved that it cannot be applied as it is when heating or when it is necessary to blow out warm air.
[0005]
The present invention has been made in view of the above points, and is an air conditioner capable of performing suitable air conditioning for a room even when air is supplied at a low air volume and low speed during heating or when hot air is blown out. In addition, an object of the present invention is to provide an air conditioning method and to solve the above problems.
[0006]
[Means for Solving the Problems]
In order to achieve the above object, according to claim 1, an air conditioner for air-conditioning a space from a floor surface of a room to a predetermined height as an air-conditioning target area for supplying predetermined air-conditioned air, An air supply port for supplying the conditioned air into the room, and a flow path for conveying the conditioned air to the air supply port, and the air supply port is below a wall surface in the air-conditioning target area. An air conditioner is provided, wherein the air supply opening is provided with a damper that can be opened and closed, and the damper is divided vertically in the height direction and can be opened and closed independently. Is done.
[0007]
According to the air conditioning equipment having such a configuration, the upper and lower dampers can be opened and closed independently in the upper and lower dampers at the air supply port portion. Open only the damper and blow it out from below. In this case, by blowing out toward the floor surface with a small air volume and low wind speed, the Coanda effect spreads the warm air over the floor surface as if scooping up the floor surface, and then slowly rises, resulting in an attractive diffusion effect. The entire room can be air-conditioned uniformly to a desired temperature. And since the air volume is low and the air velocity is low, less energy is consumed and the indoor atmosphere is not disturbed.
[0008]
On the other hand, at the time of cooling, for example, both the upper and lower dampers are opened and the cold air is blown out with a small air volume and a low air speed, so that the entire air-conditioning area of the room can be uniformly air-conditioned by the replacement ventilation method. In this case, the blowing direction may be the horizontal direction. Moreover, it takes less time to air-condition to a desired temperature by opening both the upper and lower dampers and increasing the amount of blown air.
[0009]
In view of such operational effects, the damper may be any one that substantially functions as a damper. For example, the damper may be an air supply port having a configuration in which a large number of rotating blades and blades are arranged in parallel vertically. That is, in the present invention, the damper includes those that substantially function as a damper. And it is still more preferable if the elevation angle and depression angle from the air supply port can be adjusted. Of course, the damper, the blade, and the other air supply opening / closing member may be installed on the front surface of the air supply opening. However, in terms of design, it is preferable to provide them on the back side of the air supply opening. Furthermore, if an appropriate filter is interposed at the air supply port, it can be applied to a room that requires cleaner air conditioning, and a uniform blowout can be realized by adjusting the pressure resistance.
[0010]
The configuration of the damper is convenient if it can be opened and closed remotely, such as a so-called motor damper, and it is further preferable if a control device that automatically controls the opening and closing of the upper and lower dampers is added according to the temperature of the supply air . For example, during heating, the lower damper is opened, and a depression angle is added in the blowing direction and blown out toward the floor. Further, it may be configured to be controlled by the control device so as to blow out in the horizontal direction.
[0011]
If the flow path is a space formed between the outer wall and the inner wall constituting the wall of the chamber, it is not necessary to install a special duct. In addition, the combination of a hollow unit panel that integrates the outer wall and inner wall can reduce skin loading, facilitate construction, facilitate standardization of other components and equipment such as air conditioners, and building It can easily cope with changes in usage and replacement.
[0012]
The air conditioner in these air-conditioning equipment, as claimed in claim 3, is an outdoor air conditioner that is installed outside and processes the outside air, and a sensible heat exchanger that processes the air that has been processed by the outside air conditioner. If the sensible heat exchanger is installed in the flow path, the air conditioning function can be shared between the outdoor air conditioner and the sensible heat exchanger, for example, the dehumidification treatment required in the former If only the temperature adjustment is performed in the latter, it is possible to prevent excessive dehumidification and to eliminate the need for a low-temperature heat medium as condensation occurs, and to improve the coefficient of performance of the refrigerator. . Further, when applied to claim 2, it is not necessary to route the duct for introducing the return air to the flow path built in the room, so that the construction cost and the increase of the static pressure can be suppressed and the cost required for it can be reduced. .
[0013]
In Claim 4, the return air intake for taking in the return air from the room into the flow path is further provided at a position higher than the air conditioning target area, and on the upstream side of the sensible heat exchanger in the flow path. The air after being processed by the outside air conditioner is mixed with the introduced return air.
[0014]
In this way, a return air intake for taking in the return air from the room into the flow path is provided at a position higher than the air-conditioning target area, and the return air taken from the treated outside air and the return air intake in the flow path is provided. Since air is mixed, replacement ventilation in the air-conditioning target area can be performed with energy saving.
[0015]
The air conditioner according to claim 5 is characterized in that the outside air conditioner is configured to substantially adjust the humidity of the outside air, and a high performance filter is provided in the flow path. With such a configuration, the sensible heat exchanger can be exclusively used for temperature adjustment, and thus can control the temperature and humidity of the supply air with high accuracy. And since it has a high-performance filter, equipment suitable for a clean room can be easily configured.
[0016]
And when air-conditioning a room using the air-conditioning equipment, as described in claim 7, at the time of cooling, air is supplied from the entire air supply port at a wind speed of 0.15 m / s to 0.25 m / s, On the other hand, when heating is started, an optimum effect can be obtained by supplying air from the lower part of the air supply port toward the floor of the room at a wind speed of 1.5 m / s to 2.5 m / s. That is, since the conditioned air is blown out at a low speed as described above, air conditioning can be performed without disturbing the atmosphere of the room, and when heating is started, air is supplied from the lower side of the air inlet toward the floor of the room. Therefore, the warm air spreads in the room so as to crawl the floor by the Coanda effect, and air conditioning can be suitably performed. Furthermore, dust can be attracted to the plume and discharged upward by such replacement ventilation, and dust accumulation can be prevented from occurring in the air-conditioning target area.
[0017]
DETAILED DESCRIPTION OF THE INVENTION
Hereinafter, preferred embodiments of the present invention will be described with reference to the drawings. FIG. 1 shows a state where a room R of a high-capacity machine assembly factory is viewed from a plane, and FIG. 2 schematically shows a longitudinal section thereof, as a room to which the present invention is applied. Yes.
[0018]
The chamber R has three side surfaces surrounded by wall bodies 1, 2, and 3, and the remaining side surface forms a product loading / unloading port 4. The wall bodies 1, 2, and 3 basically have the same configuration, and in this embodiment, the cut-off wall 5 is built to constitute the inner wall of the wall body. The partition wall 5 may be a well-known wall panel with two plaster boards. As shown in FIG. 2, the wall bodies 1, 2, and 3 each include a partition wall 5 and an outer wall 6 constituting an inner wall, and a circulation path 7 of conditioned air as a flow path is formed therein. . The upper surface of the circulation path 7 is closed with a panel material 7a leaving an opening for connecting a duct 16 described later. The partition wall 5 is built flush with the column 8 and effectively uses the dead space of the room R.
[0019]
An outside air conditioner 11 is installed outside the room R, for example, at the top. The outside air conditioner 11 includes a cooling coil 12, a heating coil 13, a humidifier 14, and a blower 15. The outside air conditioner 11 is configured to substantially adjust humidity with respect to the introduced outside air OA. The air whose humidity has been adjusted in this way is supplied to the circulation path 7 through the duct 16. In addition, in this outdoor air conditioner 11, in order to improve the energy efficiency at the time of starting operation, the return air of the room | chamber R is suitably introduce | transduced from the inlet 17 provided in the ceiling part. Further, for example, an exhaust port 18 for exhausting an amount corresponding to the outside air processing air volume is provided at another position on the ceiling.
[0020]
In the present embodiment, the height H of the air conditioning target area S of the room R is set to 5 m. Therefore, the air supply port 21 is near the floor surface F at a position lower than the height H, and the air supply The upper end of the mouth 21 is set to a position that is 3.2 m. In the present embodiment, as shown in FIG. 1, in the opposing wall bodies 1, 3, one unit partition wall 5 is arranged for one span, that is, between the columns 8, 8, and 1 The circulation path 7 is formed alternately every other span. That is, in the wall body 1, the circulation path 7 and the air supply port 21 are formed only in the wall bodies 1b and 1d, and in the wall body 3, the circulation path 7 and the air supply port 21 are formed only in the wall bodies 3c and 3e. Is formed.
[0021]
As for the wall body 2, two unit partition walls 5 are arranged in one span, and the circulation path 7 and the air supply port 21 are formed in all the wall bodies 2a, 2b, 2c, and 2d. As described above, the air supply port 21 is formed up to a height of 3.2 m above the floor according to the amount of blown air and the speed of the blown air, but the height can be lowered by increasing the planar blown surface. . That is, the height can be kept low by taking a large blowing area in the horizontal direction. Although not shown, the partition wall 5 is provided with an inspection port for appropriately maintaining the members in the circulation path 7, but the partition wall 5 itself is configured as a revolving door, and for such maintenance. It may be convenient.
[0022]
When viewed from the inside of the chamber R, the air supply port 21 has a punching plate 22 on the chamber R side as shown in FIG. 3, a coarse dust filter 23 is provided on the back side thereof, and on the circulation path 7 side. A motor damper 24 is provided. By adding the punching plate 22 and the coarse dust filter 23 in this way, the pressure resistance at each point in the air supply port 21 is made uniform, and a uniform blowing wind speed is obtained. In this case, the pressure resistance can be adjusted as necessary by adjusting the aperture ratio of the punched plate 22 and the thickness of the coarse dust filter 23. In addition, it is good also as a structure which attached the rectification | straightening member suitably as a grid | lattice-like opening form instead of the punching board 22, and such a member can be suitably selected from a viewpoint of not only these but aesthetics and a design.
[0023]
As shown in FIG. 4, the motor damper 24 is provided with, for example, 16 stages of blades B in the vertical direction, and each blade B1 to B16 is opened and closed by a separate motor (not shown). The opening / closing angle (elevation angle, depression angle) at that time is also controlled. In the present embodiment, the lowermost blade B16 and the upper blades B1 to B15 can be controlled to open and close independently, and in particular, the blades B1 to B15 are configured to be integrally opened and closed as upper dampers. .
[0024]
A wall having a circulation path 7, for example, a predetermined height in each of the intermediate cut walls 5 inside the walls 1 b, 1 d, 2 a to 2 d, 3 c, 3 e, i. A return air intake 31 for taking in the return air RA from R and introducing it into the circulation path 7 is formed. The return air intake 31 is provided with a pressure fan 32 as a circulation fan so that the sucked return air RA is blown into the circulation path 7. Further, a check damper (not shown) for preventing backflow is attached to the pressure fan 32 on the pushing side, that is, on the circulation path 7 side.
[0025]
In the present embodiment, in order to avoid the temperature stratification of the air-conditioning target area S from collapsing, the pressure fan 32 is attached at a position of 10 m in height, and the return air RA is generated at a wind speed of 3.8 m / s. It is set to inhale. In addition, if the measuring system is configured so that the height of the temperature stratification can be kept constant while controlling the number of the pressure fans 32 when the cooling load is reduced, the air conveyance power can be reduced and further energy saving can be achieved. The effect can be expected.
[0026]
A sensible heat exchanger 41 is disposed upstream of the air supply port 21 in each circulation path 7 and downstream of the return air intake port 31. This sensible heat exchanger 41 is a known one that detects the temperature in the room R and the humidity of the air and controls the flow rate of cold water with a two-way valve so as not to cause dew condensation. For example, a product “Takasago Thermal Engineering Co., Ltd.” “Dry coil (registered trademark)” can be preferably used. As described above, the outside air conditioner 11 includes the cooling coil 12, the heating coil 13, and the humidifier 14 in addition to the blower 15. However, the dehumidifying process is performed by the cooling coil 12, and the humidification is performed by the heating coil 13 and the humidifier 14. The sensible heat exchanger 41 controls the inside of the chamber R to a predetermined temperature.
[0027]
The air conditioning equipment according to the present embodiment is configured as described above. For example, when the cooling operation of the room R is performed, the blades B1 to B1 of the motor damper 24 of the air supply port 21 as shown in FIG. For example, all of B16 are controlled to be in a horizontal position, that is, controlled so that the blowing direction is horizontal, and all are set in an open state. Then, the treated outside air whose moisture content is controlled by the outside air conditioner 11 is sent to the circulation path 7 and mixed with the return air RA from the chamber R in the circulation path 7, and then the sensible heat exchanger 41 performs a predetermined process. Then, the air is supplied to the chamber R from the air supply port 21.
[0028]
At this time, the air supply SA from the air supply port 21 is blown out as the air-conditioning target area S up to a height of 5 m as described above. The air conditioning target area S of the room R is replaced with fresh air supply SA. A small portion of the air pushed up by the air supply SA in this way becomes a plume updraft, but except for a small portion of the ascending region, temperature stratification is formed in the height direction and The room temperature is controlled to 5m.
[0029]
More specifically, for example, a room temperature of 26 ° C. (DB) is 25 ° C. (DB) blown out at a low wind speed of 0.25 m / s, that is, a set room temperature minus 1 ° C. up to a floor height of 5 m. (DB) air slowly fills the discharge direction. In this case, the air just discharged from the difference in air density is not mixed with the existing air, and the temperature set in the horizontal direction of the chamber R is maintained. Even in the vertical direction of the chamber R, by appropriately designing the blowing temperature from the heat generation temperature of the heating element, it is possible to contribute to the prevention of deterioration such as material expansion and maintenance of processing accuracy, particularly in factories. Also, even in processes that dislike airflow such as laser length measurement, compared to the conventional method of agitating with jet airflow, which stopped air conditioning at that time, it was time and labor for starting and stopping (in the past, when working, In some cases, the supply of air may be stopped) and the room temperature may be prevented from being disturbed when returning.
[0030]
On the other hand, at the time of heating, for example, when the room temperature is 20 ° C. (DB), control is performed to blow out air at 21 ° C. (DB) at a high wind speed of 2.5 m / s. As shown in Fig. 5, only the lowermost blade B16 is opened, and a depression angle is formed so as to be obliquely directed to the floor F side of the chamber R. Therefore, the supply air SA blown out from the supply port 21 becomes an air flow adhering to the floor F due to the Coanda effect and spreads in the room R. In addition, since such a high-speed adhering flow reaches the opposite end in the discharge direction and then attracts ambient air in the process of rising due to buoyancy, a large-scale circulation flow is formed in the entire chamber R, As a result of promoting the mixing, the thermal environment is improved as compared with the conventional blowing from the ceiling surface, and the air-conditioning target area S can be quickly reached the set temperature. That is, when heating is started, the time until the air-conditioning target area S is set to a predetermined temperature is early. Therefore, according to the air-conditioning equipment according to the present embodiment, the replacement ventilation can be suitably performed as described above, and the rise time at the time of starting the heating, which has room for improvement, can be shortened.
[0031]
When the present invention is applied to a clean room, for example, a high performance filter 42 such as a HEPA filter or a ULPA filter is attached to the downstream side of the sensible heat exchanger 41. Since a known method can be used as the mounting method and the sealing method at this time, a specific description thereof will be omitted. When such a high performance filter is interposed, the supply air SA blown out from the supply port 21 becomes a horizontal laminar flow of clean air during the cooling to clean the inside of the chamber R. On the other hand, clean air rises from the floor F toward the ceiling during heating, but by taking measures such as dust-proofing the floor, the dust-up phenomenon can be prevented. Therefore, there is no problem even in the heating operation in the clean room.
[0032]
In a clean room, the worker wears a dust-free garment, and the work process point is generally below the operator's hand. Therefore, the dust generated from the worker's face exposed from the dust-free garment and the dust generated from the process itself dropped to the work position or stayed on the workbench, but the present invention is applied to a clean room. In this case, dust is accompanied by the upward flow, and the amount of dust around the work space can be reduced. In high ceiling facilities, the ceiling space that does not contribute to production and measurement is actively used as a dust discharge path. Compared with a conventional turbulent flow clean room in which HEPA filter units are distributed on the ceiling, dust accumulation does not occur, and there is less unevenness and a uniform cleanness can be maintained in the horizontal direction in the room. Therefore, even if the present invention is applied to a clean room, it is possible to create a better environment with energy saving than a conventional clean room.
[0033]
Instead of the pressure fan 32 provided at a high position of the partition wall 5, a simple suction port is provided, and the high performance filter 42 downstream of the sensible heat exchanger 41 is replaced by a fan filter unit (integrated high performance filter and blower). ) Can be substituted. In this case, the blower 15 of the outside air conditioner 11 is not always necessary. In any case, the installation position of the high-performance filter 42 is not necessarily downstream of the sensible heat exchanger 41, and is between the position of the pressure fan 32 and the return air intake 31 and the upper end of the air supply port 21. Thus, it may be provided at an appropriate place in the circulation path 7. However, as a matter of course, it is necessary to seal the partition wall 5 to ensure airtightness.
[0034]
In the above embodiment, the capacity of the pressure fan 32 is adequately selected or sufficient as a blower for the two-sided wall bodies provided by thinning out, that is, the wall bodies 1a, 1c, 1e, 3a, 3b, and 3d. It is also possible to form the sensible heat exchanger 41 and the air supply port 21 over the entire side surface by using a material having a sufficient static pressure.
[0035]
【The invention's effect】
According to the air conditioning equipment of claims 1 to 5, air conditioning suitable for a room can be performed even when air is supplied at a low air flow rate and low speed during heating or when blowing hot air. In particular, in the case of claim 2, it is not necessary to construct a special duct, and it is easy to standardize other components and equipment such as an air conditioner, and it is also easy to change the use of a building or replace it. It becomes possible to respond. Moreover, in the case of Claim 3, an air-conditioning function can be shared by an external air conditioner and a sensible heat exchanger. In Claim 4, efficient replacement ventilation can be implemented, and the air-conditioning equipment of Claim 5 can respond to a clean room. According to the air conditioning method of claim 6, it is possible to suitably perform air conditioning using the air conditioning facilities of claims 1 to 5.
[Brief description of the drawings]
FIG. 1 is an explanatory view seen from the plane of a room having an air conditioning facility according to an embodiment of the present invention.
FIG. 2 is a schematic explanatory view of a longitudinal section of the chamber of FIG.
3 is a partial cross-sectional front view of an air supply port provided in the chamber of FIG. 1. FIG.
FIG. 4 is an explanatory diagram showing a state of opening and closing a motor damper of an air supply port during cooling.
FIG. 5 is an explanatory diagram showing a state of opening and closing a motor damper of an air supply port during heating.
[Explanation of symbols]
1, 2, 3 Wall body 5 Partition wall 6 Outer wall 7 Circulating path 11 Outside air conditioner 12 Cooling coil 13 Heating coil 14 Humidifier 15 Air blower 21 Air inlet 24 Motor damper 31 Return air intake 32 Pressure fan 41 Sensible heat exchanger B1 ～ B16 Feather F Floor R Room

Claims (6)

A facility that air-conditions a space from the floor of the room to a predetermined height as an air-conditioning target area,
An air conditioner for supplying predetermined conditioned air;
An air supply port for supplying the conditioned air into the room;
A flow path for conveying the conditioned air to the air supply port,
The air supply port is provided below a wall surface in the air conditioning target area,
The air supply opening is provided with a damper that can be freely opened and closed,
The air conditioner is characterized in that the dampers are divided vertically in the height direction and can be opened and closed independently. 2. The air conditioning equipment according to claim 1, wherein the flow path is a space formed between an outer wall and an inner wall constituting a wall of the chamber. The air conditioner has an outside air conditioner that is installed outdoors and processes outside air, and a sensible heat exchanger that processes air after being processed by the outside air conditioner,
The air conditioning equipment according to claim 1 or 2, wherein the sensible heat exchanger is installed in the flow path. A return air intake for taking in return air from the room into the flow path is provided at a position higher than the air-conditioning target area, and an upstream air conditioner is installed upstream of the sensible heat exchanger in the flow path. The air-conditioning equipment according to claim 3, wherein the air after being processed and the intake return air are mixed. The said outside air conditioner is comprised so that the humidity of outside air may be adjusted substantially, Furthermore, the high performance filter is provided in the said flow path, The Claim 3 or 4 characterized by the above-mentioned. Air conditioning equipment. An air conditioning method for air conditioning a room using the air conditioning equipment according to claim 1,
During cooling, air is supplied from the entire air supply port at a wind speed of 0.15 m / s to 0.25 m / s,
An air-conditioning method, wherein at the time of heating activation, air is supplied from a lower part of an air supply opening toward a floor of a room at a wind speed of 1.5 m / s to 2.5 m / s.

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