JPH0735915U - Air conditioner - Google Patents

Abstract

(57) [Abstract] [Purpose] To provide an inexpensive air conditioner with high heat exchange efficiency. [Structure] A partition plate 29 divides the inside of the casing to form a continuous U-shaped air passage D, a heat exchange coil 8 is provided at the bottom of the air passage D, and filters 6, 7 are provided near the suction port at the upper portion. The fans 10 are arranged and fixed to the discharge ports 12, respectively. Then, the passage area of the air passage D is narrowed in the fan mounting portion space E. Further, the partition plate is formed in a stepwise manner so as to be relatively wide in the filter mounting space F adjacent to the fan mounting space E in the horizontal direction via the partition plate and the coil mounting space G continuous below. .

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to an air conditioning unit of a high efficiency and low noise type in an air handling unit type in which a continuous U-shaped air passage is formed by partitioning a casing.

[0002]

[Prior art]

 As a concrete example of this kind of conventional general air conditioner, as shown in FIG. 4 and FIG. 5, a partition plate 3 arranged substantially vertically inside the casing 2 of the air conditioner 1 divides the space A and the space B from each other. It is divided into two chambers and constitutes a U-shaped air passage C. The air for the air conditioner is sucked in through the suction port 5 provided on the suction side top plate 4 of the casing 2, passes through the space A provided with the pre-filter 6 and the main filter 7 near the suction port 5, and then at the bottom. After passing through the heat exchange coil 8 to be used by arranging so that the air passage surfaces are on the left and right sides, it moves to the space B, and is cooled (or heated) when passing through this heat exchange coil, and then the discharge side ceiling. It is supplied to the outside of the air conditioner 1 as air conditioning air through the fan suction port 11 provided on the side surface of the fan 10 fixed to the plate 9 and the air from the discharge port 12. The casing 2 is composed of the left and right side plates 14 and 15, the front and rear side plates 16 and 17 of the space A, the front and rear side plates 18 and 19 of the space B, and the base 20 in addition to the top plates 4 and 9 described above. The sound absorbing materials 21 to 28 are internally attached to the inner surfaces by adhesion or the like.

[0003]

[Problems to be solved by the device]

 Therefore, since the heat exchange coil 8 is arranged at the bottom of the U-shaped air passage C, the air flow passing through the heat exchange coil 8 is biased, and the passing wind speed tends to be slow near the bottom. Results in reduced efficiency. Therefore, if it is possible to increase the passing wind speed in the region relatively close to the bottom, the heat exchange efficiency can be improved. On the other hand, the average sound pressure level of the space B using the fan 10 as a sound source is generally determined by the sound absorption force obtained by the product of the inner surface area of the space B and the average sound absorption coefficient of the surface B, and the larger it is, the lower the average sound pressure level is. As a result of this, for example, the external sound heard through the front plate 18 and the like is also reduced. Further, depending on the degree of decrease in the sound pressure level in the space B due to the decrease in the power of the sound source that passes through the heat exchange coil 8 and propagates to the space A, the sound absorbing materials 21, 24, 25, 26 in the space A have a reduced thickness, for example. Furthermore, it can be removed.

In order to solve the problems of the above technology, an object of the present invention is to provide an air conditioner with high heat exchange efficiency, low noise, and low cost.

[0005]

[Means for Solving the Problems]

 The present invention has been made in order to achieve the above-mentioned object, and the passage area of the air passage is narrowed in the upper fan mounting space, and the filter mounting space is connected to the adjacent filter mounting space in the horizontal direction and below by the partition plate. The gist of the present invention is to divide the space into two spaces in the casing so that the coil mounting space is relatively wide, and to form a partition plate that forms a U-shaped air passage in a stepwise shape.

[0006]

[Action]

 A partition plate that forms two spaces to form a U-shaped air passage inside the casing is formed in a step-like shape, so that a U-shape is directed from the suction port provided in one space to the discharge port provided in the other space. The air flow flowing in a rectangular air passage is smaller than the conventional one because the air flow in the lower area of the heat exchange coil increases because the passage is reduced toward the left and right side plates on both the inflow and outflow sides of the heat exchange coil. A U-shaped air passage can be formed, and the acoustic energy generated by the fan as the sound source is, on the contrary, attenuated by repeating the expansion of the air passage from the fan suction port to the suction port of the air conditioner. Since the partial space becomes wider, the average filtration air velocity in the pre-filter and the main filter can be reduced.

[0007]

【Example】

 The air conditioner of the present invention will be described below with reference to the illustrated embodiment. In FIGS. 1 and 2, 1 is an air conditioner having a required size, 2 is a casing of the air conditioner 1, 29 is a partition plate for partitioning the inside of the casing 2, and the partition plate 29 is a casing. A U-shaped continuous air passage D is formed therein.

Air for air conditioning is sucked in through a suction port 5 provided on the suction side top plate 4 of the casing 2, and is arranged at the bottom of the casing through a pre-filter and a main filter in the vicinity of the suction port 5. After being cooled (or heated) while passing through the heat exchange coil 8, it is discharged from the discharge port 12 through the fan suction port 11 provided on the side surface of the fan 10 fixed to the discharge side top plate 9. In the figure, reference numerals 14 and 15 are left and right side plates constituting the casing, 16, 17, 18, and 19 are front and rear side plates, and 20 is a base. Reference numeral 13 is a fan driving motor.

The partition plate 29 is integrally configured in a step-like manner with an upper plate 32, a horizontal plate 33 that is horizontally bent at the lower edge of the partition plate 33, and a vertical lower plate 34 below the upper plate 32. A U-shaped air passage D extending from the suction port 5 to the discharge port 12 is formed inside, and the passage area of each part of the air passage D is changed. That is, the upper fan mounting space E where the fan 10 is located is narrowed, and the fan mounting space F in which the pre-filter and the main filter adjacent to each other in the horizontal direction via the upper plate 32 are connected to the space F below the space. The space G in which the heat exchange coil 8 is provided is relatively wide. The coil inlet space H of the heat exchange coil 8 is narrower than the filter mounting space F.

As described above, the partition plate 29 is composed of three components, that is, the upper plate 32, the horizontal plate 33, and the lower plate 34 in a stepwise manner, so that the air flow is directed from the suction port 5 to the discharge port 12 by U Although the air passage D is formed in a letter shape, the air flow J flowing into the coil inlet space H from the filter mounting space F is contracted, and the center velocity is distributed close to the right side plate 15 to form a velocity distribution. To do. On the other hand, on the outflow side of the heat exchange coil 8, it flows from the coil mounting portion space G into the fan mounting portion space E which is narrower than the left side plate 14. Therefore, since the air flows through the U-shaped air passage D, an air passage having a large U-shape can be formed in which the air flow in the lower region of the heat exchange coil is increased. Therefore, the heat exchange efficiency of the heat exchange coil 8 is improved.

Contrary to the above, acoustic energy from the fan 10 as a sound source propagates from the fan suction port 11 to the suction port 5 via the U-shaped air passage D, but from the fan mounting space E to coil mounting. Since the air passage area is expanded from the partial space G and the coil inlet space H to the filter mounting space F, the acoustic energy is attenuated. Therefore, the reduction of the sound pressure level in the space from the coil attachment space G to the discharge port 5 is promoted, and as a result, the external noise and the noise emitted from the suction port 5 can be reduced. Alternatively, in accordance with the reduction of acoustic energy, the left and right side plates forming the coil mounting space G, the coil inlet space H, and the filter mounting space F, for example, the reduction of the plate thickness or the sound absorbing material to be attached internally to the side plates is used. It can be manufactured at low cost because it can be reduced in thickness and even removed.

Further, since the passage area of the filter mounting space F can be made wider than that of the conventional one, the average passing wind speed of the air flow passing through the built-in pre-filter 6 and main filter 7 can be reduced, so that the filter efficiency and the filter life can be shortened. Will be improved.

FIG. 3 shows a second embodiment of the present invention. For example, it is an application example in the case of supplying air-conditioning air to a plurality of places with different air-conditioning loads such as for interior and perimeter, in which a filter mounting space K and a coil inlet space L are provided in a central space 36 of an air conditioner 35. The fan mounting part spaces M and N and the coil mounting part spaces P and Q are arranged in series on both left and right sides of the central space 36 through the stepped partition plates 37 and 38, and are integrally formed. It was done.

With such a configuration, the air conditioner 35 having the same action and effect as described above can be manufactured at low cost according to each air conditioning load, and the spaces M, N, P, Q located on the left and right side surfaces of each other can be manufactured. Since it can also be used as a sound deadening space for resonance during operation, it is possible to further reduce noise.

[0015]

[Effect of device]

 The air conditioner of the present invention divides the inside of the casing by a partition plate to form a U-shaped air passage, a heat exchange coil at the bottom of the air passage, filters near the suction port at the top, and a fan at the discharge port. In each of the above-mentioned arrangements and fixings, the passage area of the air passage is narrowed in the fan mounting portion space, and the fan mounting portion space is connected to the adjacent filter mounting portion space and below through the partition plate in the horizontal direction. Since the partition plate is formed in a stepwise shape so that it is relatively wide in the space where the coil is installed, the air flow in the lower region of the heat exchange coil increases, resulting in improved heat exchange efficiency and expansion of the air passage. Noise can be reduced by the repeated effect. In addition, since the passage area of the filter mounting space is increased, the filter efficiency and the filter life are improved by reducing the flow velocity. Furthermore, the air conditioner that can handle the air conditioning load at multiple locations can be constructed at low cost, and it has many advantages such as further reduction of noise.

[Brief description of drawings]

FIG. 1 is a front view illustrating an embodiment of an air conditioner according to the present invention.

FIG. 2 is a left side view of the air conditioner shown in FIG.

FIG. 3 is a front view illustrating an aspect of a different embodiment of the air conditioner of the present invention.

FIG. 4 is a front view of a known example.

5 is a left side view of FIG. 4. FIG.

[Explanation of symbols]

 1 Air conditioner 5 Suction port 6 Pre-filter 7 Main filter 8 Heat exchange coil 10 Fan 12 Discharge port 29, 37, 38 Partition plate D U-shaped air passage E Fan mounting space F Filter mounting space G Coil mounting space H coil entrance space

Front page continuation (72) Kenzo Kishimoto 4-5-11 Higashiota, Ibaraki City, Osaka Prefecture Hitachi Cold Heat Co., Ltd. Ibaraki Plant

Claims (2)

[Scope of utility model registration request] 1. A partition plate divides the interior of the casing to form a continuous U-shaped air passage, a heat exchange coil is provided at the bottom of the air passage, and filters are provided near the suction port at the upper part of the air passage. The fans are arranged and fixed, respectively, the passage area of the air passage is narrowed in the fan mounting portion space, and the fan mounting portion space is continuously provided below and adjacent to the filter mounting portion space via a partition plate. An air conditioner characterized in that a partition plate is formed in a step shape so as to be relatively wide in a coil mounting portion space. 2. A central space of an air conditioner body shares a coil mounting space with a filter mounting space, and a plurality of staircase partition plates are provided on each of the left and right sides of the central space to mount respective fan mounting parts. The air conditioner according to claim 1, wherein the space and the coil mounting portion space are arranged in series and are integrally formed.