JPS59200139A - Air conditioner - Google Patents

Abstract

PURPOSE:To reduce the entire air conditioner in size by providing a commutator made of a porous plate formed with a hole at the position opposed to an impeller of a blower, thereby eliminating an air chamber. CONSTITUTION:In an air conditioner in a building which high power equipments are respectively contained in partitioned rooms in high thermal density like an atomic power plant, a casing 5 is formed in a box shape having an air intake port 5a at one end side and an air diffuser 5b at the other end side to flow air to be cooled horizontally. A commutator 12, a filter 13 and a heat exchanger 14 are arranged horizontally in this order at the downstream side of the blower 11 in the casing 5. The commutator 12 employs a porous plate formed with many air flow holes 15,... at a plate made of metal, and is disposed oppositely to the downstream side of an impeller 9.

Description

[Detailed Description of the Invention] [Technical Field of the Invention] The present invention is applicable to nuclear power plants, for example,
The present invention relates to an air conditioner for cooling equipment used in buildings, etc. that house equipment with high heat density and have compartmentalized rooms.

[Technical background of the invention and its problems]

For example, in buildings with high heat density, such as nuclear power plants, where high-output equipment is housed in separate rooms, independent air conditioners, so-called local taras, are installed in each compartment as needed. This ensures effective cooling.

As a conventional air conditioner of this type, an air conditioner a of an air link unit type as shown in FIG. 1 is used, for example.

In other words, this device has a blower C built into the casing b, and a motor d drives the impeller of the blower EC via a bell (6D), and the air taken in from the air inlet f is transferred to the heat exchanger g After being cooled in the air chamber, the air is guided to the blower C through the first air chamber/h1 and the second air chamber h2, and the cold air is sent from the Suita outlet 1 to the target cooling area. There is. These air chambers hl' and h2 have the function of rectifying the flow of air to the heat exchanger g. However, in the case of the above conventional example, there are large capacity air chambers hl' and h2 in the casing b.
However, the air conditioner provided with h2 has a disadvantage in that the external dimensions of the entire air conditioner are large and require a large installation space, making it disadvantageous to install it in a narrow room.

[Purpose of the invention]

The present invention has been made based on the above circumstances, and its purpose is to provide an air conditioner that can eliminate the conventionally used air chamber and can be significantly smaller than the conventional one. It is in.

[Summary of the invention]

That is, the present invention provides an air conditioner body casing having an air inlet at one end and an air outlet at the other end, a heat exchanger provided in the casing, and a heat exchanger provided at the air inlet of the casing. An axial-flow blower, such as a mixed-flow axial-flow blower, which is forced to create forced ventilation, and a mixed-flow axial-flow blower, which is provided opposite to the downstream side of the blower, has a large number of air circulation holes, and has an opening at a position facing the impeller of the blower. This is an air conditioner equipped with a perforated plate and a flow regulator made of, for example, a punched metal. The air that hits the flow regulator is directed toward the opening in the center of the flow regulator by the wind pressure, flows out from each air circulation hole, and is sent to the heat exchanger side. Therefore, the wind speed near the center of the flow regulator and the area around the flow regulator It is possible to reduce the variation in the wind speed in the heat exchanger, and to send the rectified air flow to the heat exchanger.

[Embodiments of the invention]

An embodiment of the present invention will be described below with reference to FIGS. 2 to 5. 1 in the figure indicates an air conditioner. Reference numeral 2 denotes the pace body, and a blower driving upper and lower part 4 is installed on the upper surface of the pace body 2 via a motor mount 3. Also,
Reference numeral 5 denotes an air conditioner main body cage 7/g constituting the main body of the air conditioner, and this casing 5 has an air vent 5a on one end side so that the air to be cooled can be horizontally distributed. , and is formed into a box shape with 4:H air suita ports 5b on the other end side.

The inner surface of the casing 5 is coated with a heat insulating material as shown in the figure, and the outside of the casing &i! 1. ,Ii
A blower casing 8 is detachably connected to the air inlet 5a, and an impeller 9 is provided inside the blower casing 8. This impeller 9 is of a so-called horizontal type with its rotating shaft disposed in the horizontal force direction, and is of a direct drive type in which the impeller cone portion 9a of the impeller 90 is directly connected to the output shaft 10 of the motor 4. That is, the motor 4, the impeller 9, the blower casing 8, and the like feed the push die, so the load of the impeller 9 is supported by the bearing of the motor 4.

Inside the casing 5, on the downstream side of the blower 11, a fluid regulator 12, a filter 13, and a heat exchanger 14 are arranged in this order in the horizontal force direction. As shown, a perforated plate having a large number of air circulation holes 15 formed in a plate material such as metal is used, and is disposed facing the downstream side of the impeller 9. The central part of the flow regulator 12, that is, the impeller 9
An opening 16 having an inner diameter approximately corresponding to the diameter of the cone portion 9a is formed at a position facing the cone portion 9a. The shape of the opening 16 may be circular as shown in FIG. 4, square as shown in FIG. 5, or other shapes.

On the other hand, as the filter 13, for example, a wire mesh filter, a fibrous filter, a nonwoven fabric filter, or the like is adopted. The heat exchanger 14 is, for example, a fin-tube type cooling coil, that is, a cooling tube made of a material with good thermal conductivity such as a copper tube with aluminum fins attached thereto.
For example, cooling water is made to flow through this cooling pipe as a refrigerant. 17 and 18 indicate refrigerant inlets and outlets.

Furthermore, an IJ mininator 20 is installed downstream of the heat exchanger 14.
is provided. , still, air blowout.

5b is provided with a blowout adjusting mechanism 2 such as a looper,
It is designed so that the direction of the cooling air and the wind m can be adjusted.

Next, the operation of the air conditioner 1 will be explained. By energizing the motor 4 and rotating the impeller 9, air is taken in and the fluid is regulated. , 2 to create forced ventilation. Since the air that hits the flow regulator 12 flows out from the opening 16 in the center of the flow regulator and each air circulation hole 15 due to its M and pressure, the wind speed near the center of the flow regulator and the area around the flow regulator are It is possible to reduce variations in speed and speed.

The air that has passed through the rectifier 12 passes through a filter 13 and is further rectified.

This filter 13 removes solid foreign matter such as dust from the introduced air, and prevents deterioration of heat exchange performance due to dust and the like adhering to the surface of the heat exchanger 140. The air sent from the filter 13 to the heat exchanger 14 flows through the cooling pipe of the heat exchanger 14, and the air cooled and dehumidified by the heat exchanger 14 as described above has water droplets removed by the eliminator 2θ. , and are guided to the blowout adjustment mechanism 21. The blowout adjustment mechanism 21 has the blowout air volume and wind direction set in advance, and a predetermined amount M of cooled air is guided to the location to be cooled. When the indoor air is circulated and cooled in this way, the heat generated from equipment such as indoor equipment is processed, and the indoor temperature is maintained at a predetermined temperature.

By the way, in this embodiment, when the designed room temperature is 40'C and the cooling water temperature is 35°C, the pipe speed of the cooling water flowing through the heat exchanger 14, that is, the fin-tube cooling coil, is set to 1, for example.
m/sec, and in order to increase the amount of heat exchange per unit surface area of the heat exchanger 14, the front wind speed of the air passing through the heat exchanger 14 is set to the wind speed of a conventional air handling unit type air conditioner (generally 25 nL). /sec or less) It is also fast. That is, in this embodiment, the front wind speed is set at 30 to 5. OnJsec, preferably 4.0~
It is set to 4.5 tn/Sec. Note that the above front wind speed is the value obtained by dividing the passing air volume by the heat exchanger inlet area through which the air passes.Actual passing wind speed is different from the above front wind speed because the effective aperture ratio is less than 1. The value becomes even faster.

Tables 1 and 2 shown below are the results of experiments on the rectification effect using a prototype machine according to the present invention.
Actual soaping results when using a blower with a blowing capacity of 5000 m/h.
and N[L 3 is the data at the lake surface.

However, Table 2 shows the experimental results when using a blower with a capacity of 5000 m5/h, and all data is from the surface.

The flow regulator 12 used in these tests was as shown in FIG.
We investigated wind speeds ranging from 9 to 9. Positions 1 to 9 of these measurement points
is shown in FIG.

In addition, as the m type of filter 13, α: non-woven fabric filter, β: fibrous filter, γ: full wire mesh Jzema-ε: non-woven fabric filter (with punching on both sides), and various shapes of flow regulators a% e. The ones shown in Table 3 were used.

As is clear from the above actual results, by using the flow regulator 12 having the above configuration, it is possible to reduce variations in the louse speed in the peripheral area and the j wind speed in the central area.

For example, d = 15 mm, p = 2Q am
When using a flow regulator with an opening weight of 51% and combining this with a wire mesh filter, the airflow distribution state will be as shown in FIG. 7. The shaded region S indicates the magnitude of the wind speed.

As described above, since the rectifying effect is obtained by the straightening body 12 having an extremely simple structure and a low drop, the conventionally used large-capacity air chamber can be omitted, and the entire air conditioner can be downsized. In other words, the prototype according to the present invention has an area ratio of 70%, a height ratio of 60 cm, and a volume ratio of approximately 40 cm compared to a conventional 4W air conditioner with the same capacity, which is much larger than the conventional 4W air conditioner. Small objects were enshrined there.

Moreover, according to the air conditioner 1 having the above configuration, the base body 2 includes the blower 11, the heat exchanger 14, the flow regulator 12, and the like.
Filter 13, eliminator 20. Various components such as the output adjustment mechanism 21 are arranged in a row in the horizontal direction.
This results in a stable structure with a low claw center position and high 411 property.In particular, since the motor 4 and impeller 9 are installed at a low position, this is extremely effective in lowering the center of gravity. Of course, since it is located at a low position, periodic maintenance and inspection of the blower 11 can be easily performed.
Another advantage is that it is easy to take measures to reduce vibrations generated from rotating equipment.

In the case of the above embodiment, since dew condensation does not easily occur, the intended purpose of the present invention can be achieved even without the eliminator described above. It is designed to be able to hold back water droplets even if they fly into the air. It is also possible to omit the blowout adjustment mechanism 21.

Furthermore, the rotating shaft of the impeller and the input shaft of the motor may be connected to each other via a joint.

In this case, a bearing is required on the rotating shaft of the impeller. Further, the driving force of the motor may be indirectly transmitted to the impeller via a power transmission mechanism such as a gear box, a chain, or a belt.

〔Effect of the invention〕

As described above, the present invention is equipped with a flow regulator made of a perforated plate with an opening formed at a position facing the impeller of the blower, and the flow regulator has a flow regulating function equivalent to that of a conventional air chamber. It can be demonstrated. Therefore, by employing a thin flow regulator instead of the air chamber, the overall air conditioner can be significantly downsized and lasted for a long time.

[Brief explanation of the drawing]

FIG. 1 is a perspective view of a conventional air conditioner A. Figures 2 to 4
The drawings show one embodiment of the present invention, Fig. 2 is a plan view of the air conditioner, Fig. 3 is a side view partially shown in section, Fig. 4 is a front view of the flow regulator, and Fig. 5 is a plan view of the air conditioner. FIG. 7 is a front view showing a modification of the flow regulator. Further, FIG. 6 is a schematic diagram showing the positions of wind speed measurement points, and FIG. 7 is a typical airflow distribution state diagram. 1...Air conditioner, 5...Air conditioner body caning, 5a...Air pressure, 5b...Air outlet,
9...Hafu". Fuchi % 9a... Hano car cone part, 11... T: db1 Shitakaze, 12... Cardiac fluid,
14... Heat exchanger, 16... Air circulation hole, 16...
・Opening I: Part 1. Applicant's representative Patent attorney Takehiko Suzue s1 Figure 2 Figure 11 Figure 4 Figure 5 Figure 6 Continued from page 1 0 Inventor Shoji Hirose Mitsui Daini 2, 4-2, Nihonbashi-Hongoku-cho, Chuo-ku, Tokyo Annex within Shin Nippon Air Conditioning Co., Ltd. Applicant: Toshiba Co., Ltd., 72 Horiyo-cho, Saiwai-ku, Kawasaki City @ Applicant: Japan Atomic Energy Corporation, 3-13-12 Mita, Minato-ku, Tokyo @ Applicant: Shin Nippon Air Conditioning Mitsui 2nd Annex Co., Ltd., 4-2, Honseki-cho, Nihonbashi, Chuo-ku, Tokyo

Claims (1)

[Claims] An air conditioner main body casing having an air inlet at one end and an air outlet at the other end, a heat exchanger provided in this casing, and a forced ventilation provided at the air inlet of the casing. an axial flow blower, and a flow regulating plate made of a perforated plate, which is provided opposite to the downstream side of the blower, has a large number of air circulation holes, and has an opening formed at a position facing the impeller of the blower. An air conditioner characterized by the following: