Construction method of a pressure ventilation fan and a pressure ventilation fan with an electric shutter

Abstract

To provide a pressure ventilation fan that can clarify a construction category and facilitate construction.SOLUTION: A pressure ventilation fan used in combination with an electric shutter includes a bell mouth including an insertion hole that is a through-hole through which a power cord for the electric shutter can be inserted in a longitudinal direction and which has a size capable of inserting a plug provided in a tip of the power cord therethrough.SELECTED DRAWING: Figure 1

Description

Technical Field

[0001] The present invention relates to a forced ventilation fan, and particularly to a forced ventilation fan used in combination with an electric shutter, and a construction method of the electric shutter and the forced ventilation fan.

Background Art

[0002] A forced ventilation fan is used as an exhaust / air supply fan for ventilating the air inside a building (Patent Document 1). And, on the outdoor side of the forced ventilation fan, a shutter is provided to prevent outside air from entering the building when the forced ventilation fan is stopped. Particularly in a place where the outdoor wind is strong, the shutter is an electric type (electric shutter) and opens and closes in conjunction with the forced ventilation fan. In order to eliminate the influence of external air, the periphery of the propeller of the forced ventilation fan is covered with a bellmouth.

[0003] Since the forced ventilation fan and the electric shutter have separate power sources, when installing them on site, the plugs provided at the tips of the power cords are inserted into the outlets provided on the indoor side near the site. And, since the electric shutter is provided integrally with the forced ventilation fan on the outdoor side of the forced ventilation fan, the power cord needs to be inserted through the bellmouth and taken out to the indoor side.

Prior Art Documents

Patent Documents

[0004]

Patent Document 1

Summary of the Invention

Problems to be Solved by the Invention

[0005] Conventional forced ventilation fans have a hole (power cord insertion hole) through which the power cord of the electric shutter is inserted into the bell mouth (Fig. 4). However, since the bell mouth is for eliminating the influence of external air, the hole is sized to allow the power cord to pass through, and a plug cannot be inserted. That is, when installing a forced ventilation fan at the site, after inserting a power cord without a plug at the end, it is necessary to attach a plug to the tip and insert it into the outlet.

[0006] The construction procedures on site for conventional electric shutters and forced ventilation fans are as shown in Table 1. First, the selection and arrangement of an outlet for the forced ventilation fan / electric shutter and a plug for the electric shutter are carried out in advance by the electrical cooperation company. Then, the air conditioning equipment worker installs the mounting frame of the forced ventilation fan, and the electrical equipment worker constructs the outlet for the forced ventilation fan / electric shutter. Both of these are high-altitude operations. After that, it becomes the work of the air conditioning equipment worker, and the electrical equipment worker temporarily moves to another location. Subsequently, the air conditioning equipment worker installs the electric shutter and temporarily installs the forced ventilation fan, takes out the power cord of the electric shutter from the power cord insertion hole of the forced ventilation fan, and performs the final installation of the forced ventilation fan. After that, again, the electrical equipment worker attaches a plug to the tip of the power cord, arranges the power cables of the forced ventilation fan and the electric shutter, and then inserts the plug into the outlet.

[0007]

Table 1

[0008] The conventional construction method has the following problems. (1) Even in design and construction projects, the classification of plug installation work is unclear, and there is a risk of omission in the drawings and estimates. (2) Since the forced ventilation fan is installed at a high altitude, the plug installation work also becomes a high-altitude operation. (3) Since the plug is composed of fine components, the installation work at a high altitude may cause poor quality. (4) Since the electrical equipment worker needs to perform work at height after the air conditioning equipment worker installs the forced ventilation fan and the electric shutter, arrangements for an aerial work platform and scaffolding are required. (5) Detailed process adjustment is required between the electrical equipment worker and the air conditioning equipment worker. (6) Since the construction involves multiple trades, the division of quality responsibility becomes unclear.

[0009] An object of the present invention is to provide a forced ventilation fan and an electric shutter with a clear construction division and easy construction, and a construction method for the forced ventilation fan.

Means for Solving the Problems

[0010] The forced ventilation fan of the present invention made to achieve the above object is Separate from the electric shutter and the above-mentioned a forced ventilation fan used in combination with an electric shutter, and the bellmouth has an insertion hole through which the power cord of the electric shutter can be inserted in the front-rear direction and which is a through hole large enough to insert the plug. Plug is pre-attached The bellmouth has a slit-shaped insertion hole through which the power cord of the electric shutter can be inserted in the front-rear direction and which is open at the end of the bellmouth. Recorded It has an insertion hole which is a through hole large enough to insert the plug. Also, The pressure ventilation fan of the present invention is separate from the electric shutter and is a pressure ventilation fan used in combination with the electric shutter, the bellmouth has a slit-shaped insertion hole through which the power cord of the electric shutter can be inserted in the front-rear direction and which is open at the end of the bellmouth. Plug is pre-attached It has a slit-shaped insertion hole through which the power cord of the electric shutter can be inserted in the front-rear direction and which is open at the end of the bellmouth.

[0011] Also, the construction method of the electric shutter and the forced ventilation fan of the present invention made to achieve the above object is The electric shutter and the pressure ventilation fan are separate from each other, characterized in that a plug is provided in advance at the tip of the power cord of the electric shutter, the electric shutter is installed, the power cord with the plug is inserted into the insertion hole of the forced ventilation fan, the forced ventilation fan is installed, and the plug of the electric shutter and the plug of the forced ventilation fan are inserted into a power outlet.

Effects of the Invention

[0012] The present invention can obtain at least one of the following effects by means for solving the above-described problems. (1) By performing the attachment of the plug in advance at the manufacturer's or agency warehouse of the electric shutter, the classification of the installation work becomes clear, and there is no risk of omission in the drawings and estimates. (2) The plug attachment work at high places becomes unnecessary, enabling risk assessment and labor saving. (3) Since the plug is attached to the power cord 21 in advance, a product test can be carried out before on-site delivery, and the quality can be ensured even for plugs of fine members. (4) It is not necessary to arrange for a high-altitude work vehicle or curing again. (5) It is also not necessary to adjust the processes between the electrical equipment worker and the air-conditioning equipment worker. (6) The plug attachment work clearly becomes a classification of the air-conditioning equipment work, and the quality responsibility classification becomes clear. (7) Even when renewing the pressure ventilation fan, since the plug attachment work does not occur, electrical work by an electrician becomes unnecessary.

Brief Description of the Drawings

[0013]

Figure 1

Figure 2

Figure 3

Figure 4

Modes for Carrying Out the Invention

[0014] Hereinafter, with reference to the drawings, the pressure ventilation fan of the present invention and the construction method of the pressure ventilation fan and the electric shutter will be described in detail. In this description, front and rear are defined based on the pressure ventilation fan and the electric shutter, and the front means the direction from the pressure ventilation fan toward the electric shutter (outdoor side).

[0015] [Example 1] (1) Configuration of the pressure ventilation fan The pressure ventilation fan 1 of the present invention is used in combination with an electric shutter 2 arranged in the front. The pressure ventilation fan 1 houses the propeller 11 in the opening provided in the center of the bellmouth 12 so as to cover the periphery of the propeller 11 with the bellmouth 12, and supports the motor 13 attached to the propeller 11 by the support legs 14 fixed to the bellmouth 12. Further, the bellmouth 12 has an insertion hole 15 of a predetermined size (Fig. 1).

[0016] (2) Insertion hole The insertion hole 15 is for inserting the power cord 21 of the electric shutter 2 in the front-rear direction of the pressure ventilation fan 1. A plug 22 is attached to the tip of the power cord 21. The diameter of the insertion hole 15 is made larger than the maximum width of the plug 22 so that the plug 22 can pass through, and the power cord 21 with the plug 22 attached can be inserted into the rear side (indoor side) of the pressure ventilation fan 1. Since the insertion hole 15 has a larger diameter than the power cord 21, in order to prevent the movement of air in the front and rear directions, for example, the insertion hole 15 may be sealed with a sealing body 16 made of rubber, sponge, etc. provided with holes or slits through which the power cord 21 can be inserted, with the power cord 21 inserted (Fig. 2). The plug 22 inserted into the insertion hole 15 is inserted into a socket provided on the indoor side in combination with a plug (not shown) of the pressure ventilation fan 1. In addition, the width of the insertion hole 15 is approximately the same as the width of the power cord 21, but by making the end portion thereof in a slit shape that is open at the end portion of the bellmouth 12, the power cord 21 with the plug 22 attached can also be inserted in the front-rear direction of the bellmouth 12 through the power cord 21 from the end portion (Fig. 3).

[0017] (3) Construction method The construction procedure on site for the electric shutter 2 and the pressure ventilation fan 1 of the present invention is as shown in Table 2. Since the pressure ventilation fan 1 of the present invention has an insertion hole 15 through which the power cord 21 with the plug 22 can be inserted, the plug 22 of the electric shutter 2 is pre-attached to the power cord 21. Therefore, the selection and arrangement of the power outlet for the pressure ventilation fan 1 / electric shutter 2 and the plug 22 for the electric shutter 2 fall under the category of air conditioning installation work, and the order placement is arranged by the pressure ventilation fan manufacturer or its agency. The attachment of the plug 22 is pre-done at the manufacturer's or agency's warehouse of the electric shutter 2, which clarifies the category of the installation work and eliminates the possibility of omission in the drawings and estimates. Also, since the plug 22 is pre-attached to the power cord 21, a product test can be carried out before on-site delivery, and the quality of even the fine member plug 22 can be ensured. Moreover, the work of attaching the plug 22 at a high place is also unnecessary, realizing risk assessment and labor saving. Then, the air conditioning installer installs the mounting frame of the pressure ventilation fan 1, and the electrical installer constructs the power outlet for the pressure ventilation fan 1 / electric shutter 2. These are high-altitude operations. After that, the air conditioning installer continues the work, but no more high-altitude operations occur for the electrical installer. Therefore, there is no need to arrange for a high-altitude work vehicle or curing again, and no process adjustment between the electrical installer and the air conditioning installer is required. After that, the air conditioning installer attaches the electric shutter 2 and temporarily attaches the pressure ventilation fan 1, inserts the power cord 21 with the plug 22 of the electric shutter 2 into the insertion hole 15 of the pressure ventilation fan 1, and then performs the final installation of the pressure ventilation fan 1. The inserted power cord 21 is bundled together with the power cable of the pressure ventilation fan 1 and then the plug 22 is inserted into the power outlet. It only requires inserting the power cord 21 into the insertion hole 15, and the construction can be easily carried out even for high-altitude operations.

[0018]

Table 2

[0019] By providing the insertion hole 15 in the pressure ventilation fan 1 through which the power cord 21 with the plug 22 of the electric shutter 2 can be inserted, the installation work of the plug 22 clearly falls under the category of air conditioning installation work, and the quality responsibility category becomes clear. Also, when updating the forced ventilation fan 1, since the work of attaching the plug 22 does not occur, electrical work by an electrician is not required.

Explanation of Signs

[0020] 1 Forced ventilation fan, 11 Propeller, 12 Bellmouth, 13 Motor, 14 Support leg, 15 Insertion hole, 16 Sealing body 2 Electric shutter, 21 Power cord, 22 Plug

Claims

Claim 1: A forced ventilation fan that is separate from an electric shutter and is used in combination with the electric shutter, the bell mouth has a power cord with a plug of the electric shutter pre-attached thereto that can be inserted in the front-rear direction, and has an insertion hole that is a through-hole sized to allow the plug to be inserted, forced ventilation fan. Claim 2: A forced ventilation fan that is separate from an electric shutter and is used in combination with the electric shutter, the bell mouth has a power cord with a plug of the electric shutter pre-attached thereto that can be inserted in the front-rear direction, and has a slit-shaped insertion hole that is open at an end of the bell mouth, forced ventilation fan. Claim 3 A method of installing an electric shutter and the forced ventilation fan according to Claim 1 or 2, wherein the electric shutter and the forced ventilation fan are separate from each other, a plug is provided in advance at the tip of the power cord of the electric shutter, the electric shutter is installed, the power cord with the plug is inserted into the insertion hole of the forced ventilation fan, the forced ventilation fan is installed, characterized in that the plug of the electric shutter and the plug of the forced ventilation fan are plugged into an outlet, method of installing an electric shutter and a forced ventilation fan.

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