JP2000291989A - Air conditioning equipment and air conditioning method - Google Patents

Abstract

PROBLEM TO BE SOLVED: To effectively perform an air conditioning by ventilation during heating operation. SOLUTION: In an equipment for air-conditioning an area S to be air conditioned, from a floor F of a room R to a prescribed height, air processed by an outside air conditioner 11 for substantially adjusting humidity for outside air is introduced to a circulating passage 7 formed between a partition wall 5 and an outer wall 6, adjusted to a prescribed temperature by a sensible heat exchanger 41 and then supplied from an air supply port 21 set in the lower part of the area S of the room to be air conditioned. The air supply port 21 is provided with a damper divided vertically, and upon heating, only a lower damper is opened to blow off supply air SA to the floor F.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention is suitable for applications in which the airflow velocity is restricted, has a great advantage when applied to a large space, and requires a space for air conditioning (in a personal air conditioner, a living area of a occupant, an objective air conditioner). Is an energy-saving air-conditioning system that performs energy-saving to ensure a uniform temperature distribution in various experiments, tests, and areas that maintain the desired physical properties of the material to be processed in the production process.
And an air conditioning method using the air conditioning equipment.

[0002]

2. Description of the Related Art Large-scale air-conditioning equipment is used in a required space, such as a hall or an exhibition facility, in a occupied area, in a factory or a research facility, in a factory or a research facility, so as not to increase operating and equipment costs. It is desirable to air-condition only experimental equipment, raw materials and other samples to a predetermined temperature. For this reason, conventionally, for example, the upper space and the lower space are separated by a jet flow from a horizontal duct to prevent mixing of the air in both spaces (Japanese Patent No. 2791137). Set the exit to the middle height on the wall side,
Installing the suction port on the floor (Japanese Patent Laid-Open No. 4-257652)
No.), using a fan coil unit that is vertically long and has a special structure inside the machine, providing air outlets at the top and bottom of the unit, and adjusting the air volume of both units with an air volume adjustment mechanism (Japanese Patent Laid-Open No. 10-2464).
No. 57) has been proposed.

[0003]

However, according to the above-mentioned conventional technology, the atmosphere of the room is greatly disturbed, for example, in a process using a laser length measuring device in a precision machine factory or in an air conditioner such as an environmental test room for reproducing no wind. Problem. Also, in the case of personal air conditioning, a dramatic feeling is given to the occupants, which is not preferable. Furthermore, these technologies use a large number of fan units and nozzles that apply a high static pressure, so that power consumption is increased and operating costs are increased, and these devices and equipment are provided on a relatively high ceiling. Therefore, maintenance is also difficult.

[0004] In order to improve these points, the present inventors have paid attention to so-called replacement ventilation for supplying conditioned air at a small air volume and a low wind speed to save energy. For example, Japanese Unexamined Patent Publication No.
No. 38 proposes to supply an airflow having the above-mentioned properties slightly lower than room air to a lower space of the room.
If such a technology is developed, the above-mentioned conventional problems are considered to be improved. However, Japanese Unexamined Patent Publication No.
38 has a point to be improved that it cannot be applied as it is when heating or when it is necessary to blow out hot air, because cooling operation is assumed.

[0005] The present invention has been made in view of the above points, and it is possible to perform suitable air conditioning for a room even when supplying a small amount of air at a low speed when heating or blowing out hot air. It is an object of the present invention to provide an air-conditioning system and an air-conditioning method that can solve the above-mentioned problem.

[0006]

According to a first aspect of the present invention, there is provided a facility for air-conditioning a space from a floor surface of a room to a predetermined height as an area to be air-conditioned, wherein predetermined air-conditioning air is supplied. An air conditioner for supplying, an air supply port for supplying the conditioned air to the room, and a flow path for conveying the conditioned air to the air supply port, wherein the air supply port is ,
It is provided below a wall surface in the air conditioning target area, and the air supply port is provided with an openable and closable damper, and the damper is vertically divided in a height direction, and can be independently opened and closed independently. An air conditioning system is provided.

[0007] According to the air-conditioning system having such a configuration, a vertically divided damper is provided at the air supply port, and the upper and lower dampers can be independently opened and closed independently.
For example, at the time of heating, only the lower damper is opened to blow out from the lower side. In this case, a small amount of air is blown toward the floor at a low wind speed, so that the warm air spreads on the floor as it crawls on the floor by the Coanda effect, and is then supplied slowly. The entire room can be uniformly air-conditioned to a desired temperature. Since the air volume is small and the wind speed is low, the energy consumption is small and the atmosphere in the room is not disturbed.

On the other hand, at the time of cooling, for example, both the upper and lower dampers are opened and the cool air is similarly blown at a small air volume and a low wind speed, so that the entire air-conditioned area of the room can be uniformly air-conditioned by the replacement ventilation system. In this case, the blowing direction may be a horizontal direction. In addition, by opening both upper and lower dampers and increasing the amount of air blown out, it does not take much time to air-condition to a desired temperature.

In view of such effects, the damper only has to function substantially as a damper.
For example, an air supply port having a configuration in which a number of rotating blades and blades are vertically arranged in parallel may be used. That is, in the present invention, the damper includes one that substantially functions as a damper. It is more preferable that the angle of elevation and depression of the air outlet can be adjusted. Of course, the damper, the blade, and other air supply port opening / closing members may be installed on the front side of the air supply port. However, it is preferable to provide it on the back side of the air supply port in consideration of design. Furthermore, if an appropriate filter is interposed in the air supply port, it can be applied to a room requiring cleaner air conditioning, and can realize uniform blowing by adjusting the pressure resistance.

It is convenient to use a so-called motor damper, which can be opened and closed remotely, as a structure of the damper, and if a control device for automatically controlling the opening and closing of the upper and lower dampers according to the temperature of the air supply is added. Is still more preferred. For example, at the time of heating, the lower damper is opened, and it is controlled so as to blow down toward the floor with a downward angle at the blowing direction. Alternatively, the control device may be configured to control the blowout in the horizontal direction.

According to a second aspect of the present invention, the flow path is a space formed between an outer wall and an inner wall constituting a chamber wall.
No special duct is required. Moreover, if the outer wall and the inner wall are combined into a hollow unit panel, the skin load can be reduced, construction is easy, and other components such as air conditioners and equipment can be easily standardized. It can easily respond to changes in usage and re-arrangement.

The air conditioner in these air conditioners is
4. The sensible heat exchanger, wherein the sensible heat exchange is configured by dividing into an outside air conditioner installed outside the room to process outside air, and a sensible heat exchanger processing air after being processed by the outside air conditioner. If the vessel is installed in the flow path, the air conditioning function can be shared between the outside air conditioner and the sensible heat exchanger. For example, the necessary dehumidification processing is performed in the former, and only the temperature adjustment is performed in the latter. By doing so, you can prevent excessive dehumidification,
A heat medium having a lower temperature can be made unnecessary as the dew condensation occurs, and the coefficient of performance of the refrigerator can be improved. Furthermore, when applied to claim 2, there is no need to route the duct for guiding the return air to the flow path built in the room, and it is possible to reduce the construction cost and the increase in the static pressure and reduce the cost required for it. .

According to a fourth aspect of the present invention, a return air intake for introducing return air from the room into the flow passage is provided at a position higher than the air conditioning target area, and an upstream of the sensible heat exchanger in the flow passage. On the side, the air that has been processed by the outside air conditioner and the intake air that has been taken in are mixed.

Thus, at a position higher than the air conditioning target area,
A return air intake was provided to take the return air from the room into the flow passage, and the treated outside air and the return air taken from the return air intake were mixed in the flow passage. Replacement ventilation can be performed with energy saving.

According to a fifth aspect of the present invention, the outside air conditioner is configured to substantially adjust the humidity of the outside air,
A high-performance filter is provided in the flow path. With this configuration, the sensible heat exchanger can exclusively control the temperature adjustment, so that the temperature and humidity of the supply air can be controlled with high accuracy. And since it has a high-performance filter, equipment suitable for a clean room can be easily configured.

In the case where the room is air-conditioned by using the air-conditioning equipment, as described in claim 7, 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. On the other hand, when heating is started, the wind speed is 1.5 m / s or more.
When air is supplied from the lower part of the air supply port toward the floor of the room at a wind speed of 2.5 m / s, the optimum effect is obtained. That is, since the conditioned air is blown at the low speed, air conditioning can be performed without disturbing the atmosphere of the room, and at the time of starting heating, air is supplied from the lower side of the air supply port toward the floor of the room. Therefore, warm air spreads indoors as if crawling on the floor by the Coanda effect, and air conditioning can be suitably performed. Further, the dust can be attracted to the plume and discharged upward by the replacement ventilation, so that it is possible to prevent the accumulation of dust in the air conditioning target area.

[0017]

Preferred embodiments of the present invention will be described below with reference to the drawings. FIG. 1 is a plan view of a room R of a machine assembly factory in a large space having a high ceiling of 13.4 m and a large space as a room to which the present invention is applied, and FIG. I have.

The chamber R has three side walls 1, 2, 3
, And the other side forms a product carrying-in / out port 4. The walls 1, 2, and 3 have basically the same configuration, and in the present embodiment, the partition wall 5 is erected to form the inner wall of the wall. In addition, a well-known wall panel on which two plaster boards are attached can be used for the partition wall 5. As shown in FIG. 2, all of the wall bodies 1, 2, and 3 form a conditioned air circulation path 7 as a flow path inside the partition wall 5 and the outer wall 6 that form the inner wall. . The upper surface of the circulation path 7 is closed with a panel member 7a except for an opening for connecting a duct 16 described later. Further, the partition wall 5 is built flush with the column 8 to effectively use the dead space of the room R.

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, and is configured to substantially adjust the humidity of the introduced outside air OA. The air thus adjusted in humidity is supplied to the circulation path 7 through the duct 16. In addition, in order to improve the energy efficiency at the time of the start-up operation, the return air of the room R is appropriately introduced into the outside air conditioner 11 from an intake port 17 provided in a ceiling portion. 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.

In the present embodiment, the air conditioning target area S of the room R
Is set to 5 m, so that the air supply port 21 is located near the floor F at a position lower than the height H,
The upper end of the air supply port 21 is set at a position of 3.2 m. In the present embodiment, as shown in FIG. 1, the opposing walls 1, 3 have one span, that is, columns 8, 8.
One unit partition wall 5 is arranged in the space, and the circulation path 7 is formed alternately every other span. That is, in the wall 1, the walls 1b, 1
d, the circulation path 7 and the air supply port 21 are formed, and the wall 3
, The circulation path 7 and the air supply port 21 are provided only in the walls 3c and 3e.
Are formed.

As for the wall 2, two unit partition walls 5 are disposed in one span, and all the walls 2a,
The circulation path 7 and the air supply port 21 are formed in 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 in accordance with the amount of blown air and the blown wind speed, but the height can be reduced by increasing the number of flat blowout surfaces. . That is, the height can be suppressed low by taking a wide blowing area in the horizontal direction. Although not shown, the partition wall 5 is provided with an inspection port for maintaining members in the circulation path 7 as appropriate, but the partition wall 5 itself is configured as a revolving door, and such a maintenance door is provided. It may be convenient.

As shown in FIG. 3, when viewed from the inside of the chamber R, the air supply port 21 has a punching plate 22 on the chamber R side, and a coarse dust filter 23 is provided on the back side thereof. The motor damper 24 is provided on the 7 side. By adding the punching plate 22 and the coarse dust filter 23 in this manner, 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, by adjusting the opening ratio of the eyes of the punching plate 22 and the thickness of the coarse dust filter 23, the pressure resistance can be adjusted as needed. Note that, instead of the punching plate 22, a lattice-shaped opening may be used, and a rectifying member may be appropriately attached.
Such members are not limited to these, and can be appropriately selected from the viewpoint of aesthetics and design.

As shown in FIG. 4, the motor damper 24 has blades (blades) B provided in, for example, 16 stages in the vertical direction, and each of the blades B1 to B16 is provided by a separate motor (not shown). The opening / closing is performed, and 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 open and close integrally as upper dampers. .

A wall having a circulation path 7, for example, a wall 1b,
Partition walls 5 inside 1d, 2a to 2d, 3c and 3e
At a predetermined height, that is, at a position higher than the air conditioning target area S, a return air intake 31 for taking in the return air RA from the room R and introducing it into the circulation path 7 is formed.
The return air intake 31 is provided with a pressurized fan 32 as a circulation fan.
It is designed to blow air inside. Furthermore, this pressure fan 32
A check damper (not shown) for preventing backflow is mounted on the pushing side, that is, on the circulation path 7 side.

In the present embodiment, the pressure fan 32 is mounted at a height of 10 m and a wind speed of 3.8 m in order to prevent the temperature stratification of the air-conditioning target area S from collapsing.
/ S is set so that the return air RA is sucked. If the instrumentation system is configured so that the height of the temperature stratification can be maintained 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.

On the upstream side of the air supply port 21 in each circulation path 7 and on the downstream side of the return air intake port 31,
A sensible heat exchanger 41 is provided. This sensible heat exchanger 41
Is a well-known device 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 to prevent dew condensation. For example, a product of Takasago Thermal Engineering Co., Ltd. “Dry coil (registered trademark)” ] Can be suitably used. As described above, the outside air conditioner 11 includes the cooling coil 12 and the heating coil 1 in addition to the blower 15.
3. The humidifier 14 is provided. The dehumidification process is performed by the cooling coil 12, the humidification is performed by the heating coil 13 and the humidifier 14, and controlling the inside of the chamber R to a predetermined temperature requires the sensible heat. This is performed by the exchanger 41.

The air conditioner according to the present embodiment is configured as described above. For example, when the cooling operation of the room R is performed, as shown in FIG. The blades B1 to B16 are, for example, all controlled to a horizontal position, that is, controlled so that the blowing direction is horizontal, and are fully opened. And the outside air conditioner 11
The treated outside air whose moisture content has been controlled by this 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 controlled to a predetermined temperature by the sensible heat exchanger 41. After that, the room R is supplied with air from the air supply port 21.

At this time, the air supply SA from the air supply port 21 is blown up to the position having a height of 5 m as the air conditioning target area S as described above. The air conditioning target area S of the room R is sequentially replaced with fresh air supply SA. A small portion of the air pushed up by the supply air SA in this way becomes a plume rising airflow, but except for the small rising region, a temperature stratification is formed in the height direction, and the temperature rises from the floor surface. Control room temperature up to 5m.

More specifically, for example, at room temperature 26
At 25 ° C. (DB) blown at a low speed of 0.25 m / s, that is, air at a set room temperature minus 1 ° C. (DB) up to a height of 5 m above the floor is slowly filled in the discharge direction. Go. In this case, the air just discharged from the difference in air density will not mix with the existing air,
The temperature set in the horizontal direction of the chamber R is maintained.
By appropriately designing the blowing temperature from the heat generation temperature of the heating element even in the vertical direction of the chamber R, it is possible to contribute to prevention of deterioration such as spreading of the material and maintenance of processing accuracy, particularly in factories and the like.
Also, in processes that dislike airflow such as laser measurement,
Compared to the conventional method of indoor agitation by jet airflow that air conditioning was stopped at that time, it took time to start and stop (in the past, air supply was stopped temporarily when working) and at the time of return This has the effect of preventing disturbance of the room temperature.

On the other hand, at the time of heating, for example, when the room temperature is 20 ° C. (DB), the wind speed is as high as 21 ° C. (D) at a high wind speed of 2.5 m / s.
In this heating operation, only the lowermost blade B16 is opened and the depression angle is applied to the floor F side of the room R during the heating operation, as shown in FIG. Pointed diagonally. Therefore, the air supply SA blown out from the air supply port 21 becomes an airflow attached to the floor F due to the Coanda effect and spreads into the room R. Note that such a high-speed adherent flow, after reaching the end on the opposite side in the discharge direction, sequentially attracts the surrounding air in the process of rising by buoyancy, so that a large-scale circulating 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 reach the set temperature earlier. That is, when the heating is started, the time required for the air conditioning target area S to reach the predetermined temperature is short. Therefore, according to the air-conditioning equipment according to the present embodiment, the replacement ventilation can be suitably performed as described above, and the startup time at the time of heating startup, which has conventionally had room for improvement, can be shortened.

When the present invention is applied to a clean room, for example, a high-performance filter 4 is provided downstream of the sensible heat exchanger 41.
2. For example, a HEPA filter or an ULPA filter is attached. A publicly known method can be used for the mounting method and the sealing method at this time, and 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 cooling to clean the inside of the room R. On the other hand, during heating, the clean air rises from the floor F toward the ceiling surface. However, by taking measures such as dust-proofing the floor surface, it is possible to prevent the dust from rolling up. Therefore, there is no problem even in the heating operation in the clean room.

In a clean room, workers wear dust-free clothes, and the work process point is generally lower than the hands of the worker. Therefore, dust from the worker's face exposed from the dust-free garment and dust from the process itself fell to the work position or stayed on the work table,
When the present invention is applied to a clean room, dust accompanies the upward flow, and the amount of dust around the work space can be reduced. In a high ceiling facility, a ceiling space that does not contribute to production or measurement will be actively used as a dust discharge path. In addition, compared to a conventional turbulent clean room in which the HEPA filter units are dispersed and installed on the ceiling, dust accumulation does not occur, the unevenness is further reduced, and uniform cleanliness 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 more energy saving than the conventional clean room.

Instead of the pressurized fan 32 provided at a high position on the partition wall 5, a simple suction port is provided, and the sensible heat exchanger 41 is provided.
The downstream high-performance filter 42 may be replaced by a fan filter unit (integrating a high-performance filter and a blower). 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 the sensible heat exchanger 4
It is not necessary to be downstream of 1, but may be provided between the position of the pressurized fan 32, the return air intake 31 and the upper end of the air supply port 21, and at an appropriate position in the circulation path 7. However, as a matter of course, it is necessary to seal the partition wall 5 to ensure airtightness.

In the above-described embodiment, two thin-walled walls, that is, the walls 1a, 1c, 1e,
In 3a, 3b, and 3d, the sensible heat exchanger 41 and the air supply port 21 are spread over all side surfaces by appropriately selecting the capacity of the pressurized fan 32 or using a blower having a sufficient static pressure. It is also possible to form.

[0035]

According to the air conditioner of claims 1 to 5, even when air is supplied at a small air volume and at a low speed during heating or when blowing out hot air,
Suitable air conditioning can be performed on the room. In particular,
In the case of claim 2, the construction of a special duct is unnecessary, and the standardization of other members such as an air conditioner and equipment is also easy, and it is also easy to cope with a change in use of a building or a rebuilding. It becomes possible. In the case of claim 3, the air conditioning function can be further shared between the outside air conditioner and the sensible heat exchanger. According to the fourth aspect, efficient replacement ventilation can be performed, and the air conditioner of the fifth aspect can correspond to a clean room. According to the air conditioning method of claim 6, claim 1 is provided.
The air conditioning can be suitably performed by using each of the air conditioners of the fifth embodiment.

[Brief description of the drawings]

FIG. 1 is an explanatory diagram of a room having an air conditioner according to an embodiment of the present invention as viewed from a plane.

FIG. 2 is a schematic illustration of a longitudinal section of the chamber of FIG.

FIG. 3 is a partial sectional front view of an air supply port provided in the chamber of FIG. 1;

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 5 partition wall 6 outer wall 7 circulation path 11 outside air conditioner 12 cooling coil 13 heating coil 14 humidifier 15 blower 21 air supply port 24 motor damper 31 return air intake 32 pressurized fan 41 sensible heat exchanger B1-B16 blade F floor R room

 ──────────────────────────────────────────────────続 き Continuing on the front page (72) Osamu Nakatani, Inventor Osamu Nakayama, Kanagawa-ku 11-22, Daimachi Yokohamadaimachi, No. 801 11-21, Daimachi Yokohama-cho (72) Inventor Tetsuo 1-14-20 Sagamidai, Sagamihara-shi, Kanagawa, Japan Ent Familia 402 (72) Inventor Kazada Kazuda 1-7-1 Kyobashi, Chuo-ku, Tokyo Toda Construction Co., Ltd. (72) Inventor Masayuki Akiyama 1-7-1 Kyobashi, Chuo-ku, Tokyo Toda Construction Co., Ltd. F-term (reference) 3L081 AA03 AB01 FA03 HA01

Claims (6)

[Claims] 1. A facility for air-conditioning a space from a floor of a room to a predetermined height as an air-conditioning target area, and an air conditioner for supplying predetermined air-conditioning air, and supplying the air-conditioned air into the room. An air supply port 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 port The air conditioner is provided with a damper that can be opened and closed, and the damper is vertically divided in a height direction, and each can be opened and closed independently. 2. The air conditioner according to claim 1, wherein the flow path is a space formed between an outer wall and an inner wall forming a wall of the room. 3. The air conditioner includes an outside air conditioner installed outside the room to process outside air, and a sensible heat exchanger that processes air after being processed by the outside air conditioner. The air conditioner according to claim 1, wherein a heat exchanger is provided in the flow path. 4. A return air intake for taking in return air from a room into the flow path is provided at a position higher than the air-conditioning target area, and is provided in the flow path at an upstream side of the sensible heat exchanger. The air-conditioning equipment according to claim 3, wherein the air processed by the outside air conditioner and the intake air are mixed. 5. The outside air conditioner is configured to substantially adjust the humidity of outside air, and further includes:
The air conditioner according to claim 3 or 4, wherein a high-performance filter is provided. 6. A method for air-conditioning a room using the air-conditioning equipment according to claim 1, wherein air is supplied at a wind speed of 0.15 m / s to 0.25 m / s during cooling. Air is supplied from all over the mouth, and when heating is started, the wind speed is 1.5 m / s to 2.
An air conditioning method characterized in that air is supplied from a lower part of an air supply port toward a floor of a room at a wind speed of 5 m / s.