JP2760705B2 - Air-equipped fan structure - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an air flow path in which an axial fan is disposed in a state of crossing the air path in an inclined position in which a rotation axis is inclined with respect to an air path axis of a downstream air path. Related to fan equipment structure.

[0002]

2. Description of the Related Art As described above (see FIG. 4), in order to obtain a large amount of air by installing a fan as large as possible in a space where the space in the air passage is limited, the axial flow fan 1 is installed in the air passage of the fan.
0 is disposed in a state of crossing the air path in an inclined posture in which the rotation axis P is inclined with respect to the air path axis Q of the downstream air path 6. No consideration is given to the guide of the discharge air discharged to the side air passage 6, and as a result of simply arranging the axial flow fan 10, the air passage walls 6a and 6b of the downstream air passage 6 have fan rotation shafts. The axial fan 10 in an attitude having an angle θ with respect to the core P (in other words, an attitude inclined relative to the fan 10).
, And extend in the direction of the air passage axis Q of the downstream air passage 6 from each of the both end edges e1 and e2.

[0003]

However, in the above-described conventional embodiment, both ends e1 and e2 of the fan in the inclined direction near the axial fan in the downstream air passage 6, that is, near the discharge portion of the axial fan 10. The direction of the discharge air is changed to the air path wall 6 at a position near the edge e2 located on the downstream side of the air path.
A negative pressure vortex area x is formed due to having an angle θ with respect to b, and such a negative pressure vortex area x is generated in the vicinity of the fan blade 10v which is a blast element. There is a problem that the air blowing efficiency of the axial fan 10 is greatly reduced, that is, the actual air blowing amount is greatly reduced as compared with the air blowing capacity that the equipment fan 10 originally has. It has not been possible to effectively secure a large air volume by use, and this has led to an increase in wasted fan power.

[0004] An object of the present invention is to avoid a decrease in the air-blowing efficiency due to the above-described fan inclination arrangement by adding a rational guide structure.

[0005]

A first characteristic configuration of the structure of the fan in the air passage according to the present invention is that an axial fan has a rotation axis center with respect to an air path axis of a downstream air path. In the configuration in which the air path is disposed in a state of crossing the air path in an inclined posture, the air flow path extends in a direction along the rotation axis from a wind path wall portion near an edge located on the downstream side of the air path among both end edges of the fan in the inclination direction. A discharge air comprising: an inclined guide surface portion extending downstream; and a subsequent guide surface portion connected to the downstream edge of the inclined guide surface portion and extending downstream along the air path axis of the downstream air path. The operation and effects of the provision of the guide body are as follows.

[0006]

[Operation] That is, (see FIG. 3), the axial flow fan 1 in the inclined posture.
From 0, the discharge air discharged in the direction of the rotation axis P, in particular,
The discharge air discharged from a portion of the fan both ends e1 and e2 near the end edge e2 located on the downstream side of the air path flows in a laminar flow as much as possible while maintaining its airflow direction stably. The discharge air is guided and conditioned by the inclined guide surface portion m1.

[0007] After being guided by the inclined guide surface m1, the airflow diverting in the direction along the air path axis Q of the downstream air passage 6 is diverted by the guiding / winding action of the subsequent guide surface m2. The air turbulence caused by the air flow is suppressed and the air is turbulently sent to the downstream in the state of laminar flow as much as possible.

[0008]

As described above, as a result of the operation, according to the first characteristic configuration of the present invention, of the two ends of the fan in the inclined direction, a portion near the edge located on the downstream side of the air path, in other words, the blast element The fan discharge air can be smoothly sent to the downstream air path in a state where the formation of the negative pressure vortex area at the location very close to the fan blades is effectively avoided. Although the fan is arranged obliquely, the fan blowing efficiency is maintained at a high level to ensure a high blowing function, and power waste can be prevented.

[Second characteristic configuration of the present invention] The second characteristic configuration of the in-air-path fan installation structure according to the present invention is that the discharge air guide is connected to a downstream edge of the subsequent guide surface portion. Another object of the present invention is to provide an extended guide surface portion that extends to the downstream side of the air path in a direction inclined toward the air path expansion side with respect to the air path axis of the downstream air path.

That is, according to the second characteristic configuration (FIG. 3)
), The air path expansion after the airflow guidance by the subsequent guide surface part m2 can be made gradual by the inclined arrangement of the expansion guide surface part m3, whereby the air path by the so-called sudden air path expansion is obtained. The resistance can be prevented from increasing and the air can be blown more efficiently.

[0011]

Next, an embodiment will be described.

FIGS. 1 and 2 show a drying cabinet for agricultural products and marine products. An almost entire side wall of a drying chamber 1 is an outlet 2, and an almost entire side wall thereof is a suction opening 3. The indoor air is caused to flow in a laminar flow in the horizontal direction in the entire area of the room, and a uniform drying process is performed on the storage items in the refrigerator.

T is a moving shelf for storing the drying object.

A heat pump type dehumidifying unit 4 arranged on one side of the drying chamber 1 is connected to an air supply side damper chamber 5 to the air outlet 2.
Dehumidified air As is supplied through a ceiling air passage 6 and an air supply chamber 7 formed in a double wall structure, and suction air Ar from the suction port 3 flows through a return air chamber 8 and a return air damper chamber 9. To return to the dehumidification unit 4.

D1 to D4 are dampers that are opened and closed by a power mechanism in response to opening and closing operation commands, and 10 is a fan. An axial flow fan is used as the fan 10, and the drying chamber is switched by switching the rotation direction of the fan between normal and reverse. 1 so that the airflow direction can be reversed, that is, an embodiment in which the air outlet 2 is used as an air inlet and the air inlet 3 is used as an air outlet.

Since the amount of air supplied to the drying chamber 1 is an important factor in determining the efficiency of the drying treatment, a large fan capable of securing a sufficiently large air flow is used for the axial flow fan 10. When the axial flow fan 10 is installed in a space in the communication path between the damper room 5 and the ceiling air passage 6 having a limited vertical dimension, the upper end edge e1 of the fan 10 is located in the upper damper room 5 when viewed from the side. The rotation axis P is located inward, and is disposed in a state of crossing the air path in an inclined posture in which the rotation axis P is inclined with respect to the air path axis Q of the ceiling air path 6 serving as the downstream air path during the normal rotation operation of the fan. With this inclined arrangement, the large axial fan 10 can be installed in the air path.

Further, by disposing the fan 10 at an angle as described above, the discharge condition of the axial fan 10 to the ceiling air passage 6 having a limited vertical dimension (ie, in this example, the discharge condition at the time of the fan normal rotation operation). ) Is a bad condition, a discharge air guide 19 for guiding the discharge air from the axial fan 10 is provided in the ceiling air passage 6.

As shown in FIG. 3, the discharge air guide body 19 has a lower end edge e2 of the fan (that is, an edge e2 located on the downstream side during the normal rotation operation of the fan). , An inclined guide surface portion m1 extending downstream from the air passage wall in a direction along the fan rotation axis P, and an air passage axis of the ceiling air passage 6 connected to the downstream edge of the inclined guide surface portion m1. And a trailing guide surface portion m2 extending downstream along the air path in a direction along the core Q.
An extended guide surface portion m3 is provided so as to extend to the downstream side of the air passage axis Q of the ceiling air passage 6 in the direction inclined toward the air passage expansion side, continuing from the downstream edge of the subsequent guide surface portion m2. .

That is, in the discharge from the axial flow fan 10 having the inclined posture to the ceiling air passage 6 having a limited vertical dimension, the discharge air discharged from the axial flow fan 10 having the inclined posture in the direction of the rotation axis P, particularly, In this example, the inclined air guide surface m1 guides and regulates the discharged air so that the discharged air discharged from the portion near the lower end edge e2 of the fan flows in a laminar flow as much as possible while maintaining its airflow direction stably. Then, after being guided by the inclined guide surface portion m1, the airflow that is deflected in the direction along the air path axis Q of the ceiling air passage 6 is changed to the following guide surface portion m.
The airflow turbulence due to the deflection is suppressed by the guiding and wind regulating action of No. 2 and the airflow is smoothly sent downstream in the state of laminar flow as much as possible, thereby avoiding a decrease in the blowing efficiency of the axial fan 10 due to the inclined arrangement. The air can be efficiently blown to the ceiling air passage 6.

Further, the air path expansion in the ceiling air path 6 after the airflow guidance by the subsequent guide surface part m2 is made gradual by the inclined arrangement of the expansion guide surface part m3, thereby providing a so-called rapid air path expansion. Thus, it is possible to more efficiently send air to the ceiling air passage 6 by avoiding an increase in air passage resistance due to the air flow.

Each of the dampers D1 to D4 is formed of a bendable plate-shaped body, and two wind paths are formed by a bidirectional sliding operation in a bent state by a cord s connected to both ends. The first damper D
1 is an external blocking position for closing the upper external opening a in the upper damper chamber 5 in a state where the indoor air path of the upper damper chamber 5 is opened, and a state where the indoor air path of the upper damper chamber 5 is closed (fully closed or fully closed). (Close state) and upper external opening a of the upper damper chamber 5
To open and close the internal shut-off position.
The second damper D2 has an external shut-off position that closes the lower external opening b in the upper damper chamber 5 with the indoor air path of the upper damper chamber 5 open, and a state in which the indoor air path of the upper damper chamber 5 is closed (fully closed). (Or a state close to fully closed) in which the lower damper chamber 5 is slidably opened and closed with respect to an internal shut-off position where the lower outer opening b is opened.

On the other hand, the third damper D3 is provided in the lower damper chamber 9
When the indoor air path of the lower damper chamber 9 is opened and the upper external opening c is closed, the lower damper chamber 9 is closed (fully or almost fully closed). The lower damper chamber 9 opens and closes the lower outer opening d in the lower damper chamber 9 in a state where the indoor air passage of the lower damper chamber 9 is opened. Sliding opening / closing operation between an external shut-off position to be closed and an internal shut-off position to open a lower external opening d of the lower damper chamber 9 in a state where the indoor air passage of the lower damper chamber 9 is closed (in a state where the lower damper chamber 9 is fully or almost fully closed). There is to do.

By operating all of the first to fourth dampers D1 to D4 to the external shut-off position, the return air Ar from the drying chamber 1 is supplied to the fan 10 in the normal operation and the reverse operation, respectively. A full circulation mode in which the entire amount is circulated.

In the normal operation of the fan 10, the first
By operating the second and third dampers D1 and D2 to the external shut-off position and operating the third and fourth dampers D3 and D4 to the internal shut-off position, the outside air introduced from the upper external opening c in the lower damper chamber 9 is opened. Ao is dehumidified by the dehumidification unit 4, and the dehumidified outside air As is supplied from the outlet 2 to the drying chamber 1, and the entire amount of the return air Ar from the drying chamber 1 is supplied to the outside through the lower external opening d of the lower damper chamber 9. In the reverse operation of the fan 10, on the other hand, the third and fourth dampers D3 and D4 are operated to shut off the outside and the first and second dampers D1 and D2 are set to the inside. By operating to the shut-off position, the outside air Ao introduced from the lower external opening b in the upper damper chamber 5 is dehumidified by the dehumidification unit 4, and the dehumidified outside air As is supplied from the suction port 3 to the drying chamber 1. And all outside air mode for exhausting the total amount of return air Ar from the drying chamber 1 from the upper outer opening a of the upper damper chamber 5 to the outside.

In the normal operation of the fan 10, the first
By operating the second and third dampers D1 and D2 to the external shut-off position, and operating the third and fourth dampers D3 and D4 to an intermediate state between the external shut-off position and the internal shut-off position, drying is performed. A part of the return air Ar from the chamber 1 is exhausted to the outside from the lower external opening d of the lower damper chamber 9 and
An air-fuel mixture of the remainder of the return air Ar and the external air Ao introduced from the upper external opening c in the lower damper chamber 9 is dehumidified by the dehumidifying unit 4 and the dehumidified air-fuel mixture As is supplied from the outlet 2 to the drying chamber 1. On the contrary, in the reverse rotation operation of the fan 10, the third and fourth dampers D3 and D4 are operated to the external shut-off position, and the first and second dampers D1 and D2 are externally operated. By operating in an intermediate state between the shut-off position and the internal shut-off position, a part of the return air Ar from the drying chamber 1 is exhausted to the outside from the upper external opening a of the upper damper chamber 5 and the return air Ar is discharged. A mixture of the remaining portion and the outside air Ao introduced from the lower external opening b in the upper damper chamber 5 is dehumidified by the dehumidification unit 4, and the dehumidified mixture As is supplied from the suction port 3 to the drying chamber 1. Form.

In these partial outside air introduction modes,
By adjusting the sliding position of the damper in an intermediate state between the external shut-off position and the internal shut-off position, the ratio of the circulating air to the introduced external air is adjusted to an appropriate value according to the external air condition, the indoor condition, and the like.

Further, in the forward rotation operation of the fan 10, the first and fourth dampers D1 and D4 are operated to the internal shut-off position, so that the external air Ao introduced from the upper external opening a of the upper damper chamber 5 is dehumidified. In 4, outside air is supplied to the drying chamber 1 from the outlet 2 without dehumidification processing, and the entire amount of return air Ar from the drying chamber 1 is exhausted to the outside through the lower external opening d of the lower damper chamber 9. Similarly, in the reverse rotation operation of the fan 10, by operating the first and fourth dampers D 1 and D 4 to the internal shut-off position, the outside air Ao introduced from the lower external opening d of the lower damper chamber 9 is removed by the dehumidifying unit 4. The air is supplied to the drying chamber 1 from the suction port 3 without performing the dehumidification process, and the entire amount of the return air Ar from the drying chamber 1 is exhausted to the outside from the upper external opening a of the upper damper chamber 5.

Numerals 11 and 12 in the air supply chamber 7 and the return air chamber 8, respectively, are air conditioners for equalizing the air outlet distribution and the air inlet distribution at the outlet 2 and the inlet 3.

In the dehumidifying unit 4, the indoor unit 4A for performing the air dehumidifying process includes a dehumidifying heat exchanger 13, a reheating heat exchanger 14, and a dehumidifying object for the heat exchangers 13, 14. Fans 15 that ventilate the air Ar are arranged in series and installed inside a wind tunnel 16. On the other hand, the outdoor unit 4B includes a heat exchanger 17 for absorbing and dissipating heat and a fan 18 that ventilates the outside air Ao. I am prepared.

As the operation of the dehumidifying unit 4, the following cooling dehumidifying operation, heating dehumidifying operation, and dehumidifying operation are selectively performed by switching the refrigerant flow mode.

That is, in the cooling and dehumidifying operation, the reheating heat exchanger 1 is used while the dehumidifying heat exchanger 13 functions as an evaporator.
4 and the heat exchanger 17 for heat absorption and radiation function as a condenser,
Thus, while radiating heat to the outside with the heat exchanger 17 for absorbing and radiating heat,
The air Ar is cooled and dehumidified by the dehumidifying heat exchanger 13, and the reheated heat of the cooled dehumidified air is adjusted by the reheating heat exchanger 14.

In the heating and dehumidifying operation, the dehumidifying heat exchanger 1 is used.
The heat exchanger for reheating 14 functions as a condenser while the heat exchanger 3 and the heat exchanger 17 for heat absorption and radiation function as an evaporator. While cooling and dehumidifying the air Ar with the vessel 13,
The temperature of the cooled dehumidified air is reheated by the reheat heat exchanger 14.

In the operation for exclusive use of dehumidification, the heat exchanger for dehumidification 13 is stopped while the function of the heat exchanger for heat absorption and radiation 17 is stopped.
While the heat exchanger 14 functions as an evaporator, the reheat heat exchanger 14 functions as a condenser. Thus, in a state where heat exchange with the outside by the heat pump is cut off, the air A is passed through the dehumidifying heat exchanger 13.
r is cooled and dehumidified, and the cooled dehumidified air is reheated by the reheat heat exchanger 14.

[Other Embodiments] The present invention is not limited to the drying cabinet as in the above-described embodiment, but can be applied to a blowing configuration in various fields.

Incidentally, reference numerals are written in the claims for convenience of comparison with the drawings, but the present invention is not limited to the configuration of the attached drawings by the entry.

[Brief description of the drawings]

FIG. 1 is a front view structural view of a drying cabinet.

FIG. 2 is an enlarged plan view

FIG. 3 is an enlarged view showing a fan equipment structure.

FIG. 4 is a diagram showing a conventional fan equipment structure.

[Explanation of symbols]

 6 Downstream air path 10 Axial fan 19 Discharge air guide e1, e2 Fan edge m1 Inclined guide surface m2 Subsequent guide surface m3 Extended guide surface P Rotation axis Q Air path axis

Continuation of front page (58) Field surveyed (Int.Cl. ⁶ , DB name) F26B 21/00 F24F 13/02

Claims (2)

(57) [Claims] An axial fan (10) is provided with a rotation axis (P) with respect to an air path axis (Q) of a downstream air path (6).
Is a fan-equipped structure in an air passage arranged in a state of crossing the air passage in an inclined posture, wherein an edge (e2) located on the downstream side of the air passage among both end edges (e1) and (e2) of the fan in the inclination direction. And an inclined guide surface portion (m1) extending downstream from the air passage wall portion in the direction along the axis of rotation (P).
1) a downstream guide surface (m2) extending to the downstream side of the downstream air path in a direction along the air path axis (Q) of the downstream air path (6). (19) An air passage fan equipped structure. 2. The discharge air guide body (19) is connected to a downstream edge of the subsequent guide surface portion (m2) and winds against an air path axis (Q) of the downstream air path (6). The fan-equipped structure in an air passage according to claim 1, further comprising an expansion guide surface portion (m3) extending to a downstream side of the air passage in a direction inclined toward a road expansion side.