JP3660955B2 - Heat exchange ventilator - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a ceiling-embedded heat exchange ventilator that ventilates while exchanging heat between air supply from the outside and exhaust from the room.
[0002]
[Prior art]
In the heat exchange ventilator described above, the flow of supply air and exhaust gas that intersect at the heat exchange element is generated by a centrifugal fan such as a sirocco fan or a turbo fan, respectively. This type of fan includes a centrifugal impeller and a fan casing that houses the impeller.
[0003]
Usually, in this type of fan, an impeller chamber that houses an impeller and a motor chamber that houses a motor for driving the impeller are independently configured. It has been desired to prevent the heat generated by the stagnation.
Conventionally, ventilating fans for exhaust purposes only have been provided that use both suction type blades as a centrifugal fan and suck in room air from both the motor room side and the opposite side (actual fairness) No. 6-3321).
[0004]
[Problems to be solved by the invention]
However, in the above-mentioned publication, both suction type blades must be used, which increases the manufacturing cost.
By the way, if the air is flowing even if the air volume is small, it is sufficient for cooling the motor, but if too much air is applied to the motor, a lot of dust adheres to the drive shaft of the motor and the bearing supporting it, It tends to reduce the life of the bearing.
[0005]
On the other hand, in the above-described double-suction type impeller, since it is generally difficult to make a difference in the suction air volume from both sides, the air volume passing through the motor cannot be set very small. Therefore, dust or the like tends to adhere to the drive shaft of the motor.
Accordingly, an object of the present invention is to provide a heat exchange ventilator that can be manufactured at low cost and can suppress the adhesion of dust and the like to a drive shaft of a motor.
[Means for Solving the Problems]
To achieve the above objective,
1) The invention of claim 1
In a heat exchange ventilator that accommodates a pair of fans that respectively generate a heat exchange element and a flow of air supply and exhaust that intersect at the heat exchange element in a box-shaped main body casing,
At least one fan is composed of a single-suction impeller that is coaxially connected to the motor and sucks air from the opposite side of the motor, and a fan casing that defines an impeller chamber that houses the impeller. At least a part of the motor chamber containing the motor is partitioned by the fan casing, and the impeller chamber forms a suction port corresponding to the suction side of the stored impeller. air passage passing through the motor chamber and sucked air through the air passage without passing through the motor chamber, the fan casing (18) first and second split bodies which are bisected vertically from (19,20) Thus, the three side surfaces of the divided bodies (19, 20) are positioned in contact with the corresponding three side plates (11 to 13) of the main casing (1) .
[0006]
In the above configuration, the air passage that passes through the motor chamber and the air passage that does not pass through the motor chamber are both guided to the same side of the impeller, and an inexpensive single-suction impeller according to this configuration. Was used. Moreover, since the impeller is a single suction type, the ratio of the air volume of the air passage that passes through the motor chamber and the air volume of the air passage that does not pass through the motor chamber can be set as desired. As a result, the dust can be prevented from adhering to the drive shaft of the motor.
[0007]
In addition, since a part of the motor chamber is partitioned by the fan casing, parts costs and assembly costs can be reduced as compared with the case where a separate member is provided to partition the motor chamber, thereby reducing manufacturing costs. it can.
2) The invention according to claim 2
2. The heat exchange ventilator according to claim 1, wherein the air passage that passes through the motor chamber includes a communication space that communicates between the motor chamber and a suction port of the impeller chamber, and the communication space is formed at an upper portion of the fan casing. It is formed between the formed recessed part and the top plate of the main body casing.
[0008]
In the above configuration, the communication space included in the first exhaust air passage can be formed between both of them simply by incorporating the fan casing into the main body casing. Therefore, the communication space is formed using a member different from the above. Compared to the case, the manufacturing cost can be reduced through the reduction of the component cost and the assembly cost .
[0010]
DETAILED DESCRIPTION OF THE INVENTION
FIG. 1 is an exploded perspective view showing a schematic configuration of a heat exchange ventilator according to an embodiment of the present invention, FIG. 2 is a partially broken perspective view of the apparatus viewed from below during maintenance, and FIG. It is a fragmentary sectional exploded side view for demonstrating the assembly process of this apparatus.
[0011]
Referring to FIG. 1, the present heat exchange ventilator A (hereinafter simply referred to as a ventilator A) includes an outdoor air supply S (indicated by solid arrows in the figure) and an indoor exhaust E (in the figure, Ventilation while exchanging heat via the heat exchange element 2 between the hatched arrow E1 and the white arrow E2 for each path and the exhaust E1 and E2 merged is indicated by the black arrow) It is of the ceiling embedded type. Reference numeral 1 denotes a box-shaped main body casing whose lower surface is fully opened by an opening 1 a, and includes a top plate 10, a first side plate 11, a second side plate 12, a third side plate 13, and a fourth side plate 14. The first side plate 11 and the second side plate 12 face each other, and the third side plate 13 and the fourth side plate 14 face each other. The first side plate 11 includes an outdoor air inlet 3 for sucking outdoor air into the main body casing 1 (for supplying air), and a chamber for discharging the indoor air out of the main body casing 1 (for exhausting). An outer outlet 4 is provided. These outdoor side inlet port 3 and outdoor side blower outlet 4 are each connected to the duct (not shown) piped by the ceiling back space.
[0012]
Referring to FIG. 1, flanges 1 b are formed on the periphery of the opening 1 a on the lower surface of the main body casing 1 for each side. The flange 1 b and the square annular decorative panel 7 (see FIG. 2) The main body casing 1 is attached with the ceiling surface 8 interposed therebetween.
The opening 1a is covered with a grid-like grill 60 (see FIG. 2). The opening 1a blows outdoor air into the room by the grill 60 and a partition plate 9 (see FIG. 2) made of a rectangular rubber plate or the like. A room-side air outlet 61 for supplying air and a room-side air inlet 62 for sucking room air into the main body casing 1 are partitioned. The grill 60 may be completely removable from the decorative panel 7 or may be attached to the decorative panel 7 so as to be opened and closed by rotation.
[0013]
The heat exchange element 2 has a known configuration (see, for example, Japanese Patent Publication No. 47-19990) in which a large number of liners are laminated at predetermined intervals and has a substantially quadrangular prism shape that is long in the lamination direction. The longitudinal direction of the heat exchange element 2 is parallel to the fourth side plate 14. The heat exchange element 2 is inclined at a shallow angle in the main body casing 1 and has an intake side suction surface 2a and an exhaust side blowing surface 2b inclined upward, and an intake side blowing surface inclined downward. 2c and an exhaust-side suction surface 2d.
[0014]
The supply fan for generating the supply air flow and the exhaust fan for generating the exhaust flow are configured as an integrated fan unit U.
The fan unit U includes a double-shaft motor 15, an air supply impeller 16 and an exhaust impeller 17 that are coupled to both drive shafts 15 a of the motor 15 so as to be integrally rotatable, and a drive shaft 15 a of the motor 15. The fan casing 18 is composed of a first divided body 19 and a second divided body 20 that are divided into two vertically at the boundary. The fan casing 18 is formed of a foamed resin such as polystyrene foam.
[0015]
A fan casing 18 formed by combining both the divided bodies 19 and 20 is used for housing the air supply impeller chamber 21 for housing the air supply impeller 16 and the exhaust impeller 17. The exhaust impeller chamber 22 is partitioned, and the peripheral wall of the motor chamber 23 is partitioned between the both impeller chambers 21 and 22. In the present embodiment, the air supply fan is configured by the air supply impeller 16 and a portion of the fan casing 18 that partitions the air supply impeller chamber 21, and the exhaust fan is the exhaust air fan. The impeller 17 and the portion that defines the exhaust impeller chamber 22 of the fan casing 18 are configured.
[0016]
The motor 15 is fixed to the top plate 10 by upper and lower mounting members 24 and 25. On the other hand, in the main casing 1, the fan casing 18 is supported by the lower support plate 26 on the lower surface 44 of the second divided body 20. An electrical component 27 is attached to the lower surface of the support plate 26, and a cover member 28 is attached so as to cover the electrical component 27. Therefore, when the grille and the cover member 28 disposed inside the decorative panel 7 are removed, the electrical component 27 is exposed to the lower indoor space as shown in FIG. Maintenance is now possible.
[0017]
The support plate 26 is formed with an opening 29 communicating with the motor chamber 23 in a state where the electrical component 27 is attached. Further, the support plate 26 has a first cutout portion 30 and a second cutout portion 31.
The cover member 28 is inflated with respect to the first portion 32 so as to integrally cover the first portion 32 attached in close contact with the lower surface of the support plate 26 and the electrical component 27 and the second notch 31. And a second portion 33 formed in a protruding manner. The first portion 32 has an opening 34 communicating with the opening 29 of the support plate 26.
[0018]
A through hole 35 for forming a motor chamber 23 is formed in the first divided body 19 of the fan casing 18 in the vertical direction. An air supply impeller chamber 21 is formed on the lower surface of the first divided body 19. A first recess 36 for forming and a second recess 37 for forming the exhaust impeller chamber 22 are formed. The upper surface 38 of the first divided body 19 is positioned in contact with the top plate 10 of the main casing 1. Further, the opposite end faces 39 and 40 of the first divided body 19 are positioned in the main casing 1 by contacting the corresponding first side plate 11 and second side plate 12 respectively. One side surface 47 of the first divided body 19 is positioned in the main body casing 1 by coming into contact with the third side plate 13 of the main body casing 1. When the first divided body 19 is inserted into the main casing 1, the first to third side plates 11 to 13 guide the three surfaces 39, 40, and 47 of the first divided body 19.
[0019]
A through hole 41 for forming the motor chamber 23 is vertically formed in the second divided body 20, and an air supply impeller chamber 21 is formed on the upper surface of the second divided body 20. For this purpose, a first recess 42 for forming the exhaust impeller chamber 22 and a second recess 43 for forming the exhaust impeller chamber 22 are formed. The upper surface of the second divided body 20 is positioned in contact with the lower surface of the first divided body 19. Further, the opposite end faces 45 and 46 of the second divided body 20 are positioned in the main casing 1 by abutting against the corresponding first side plate 11 and second side plate 12 respectively. One side surface 48 of the second divided body 20 is positioned in the main body casing 1 by coming into contact with the third side plate 13 of the main body casing 1. When the second divided body 20 is inserted into the main casing 1, the three surfaces 45, 46, and 48 of the second divided body 20 are guided by the first to third side plates 11 to 13.
[0020]
In the figure, 49 is a suction port of the air supply impeller chamber 22, and 50 is an air outlet of the air supply impeller chamber 21. Reference numeral 51 denotes a suction port of the exhaust impeller chamber 22, and 52 denotes an outlet of the exhaust impeller chamber 22.
A concave portion 53 is formed on the upper surface of the first divided body 19 corresponding to the rear surface of the exhaust impeller chamber 22, and the motor chamber 23 is interposed between the concave portion 53 and the top plate 10 of the main casing 1. A communication space 54 that communicates with the suction port 51 of the exhaust impeller chamber 22 is formed.
[0021]
In the ventilator A, outdoor air is supplied from the outdoor suction port 3, the suction port 49, the air supply impeller chamber 21, the air outlet 50, the air supply side suction surface 2 a of the heat exchange element 2, and the air supply. The air is supplied into the room as an air supply S through the side air outlet surface 2c and the indoor air outlet on the lower surface of the main casing 1 in order.
On the other hand, the indoor air passes through the main air passage 55 (the air passage that sequentially follows the hatched arrow E1) and the motor chamber 23 to reach the suction port 51 of the exhaust impeller chamber 22 without passing through the motor chamber 23. Then, it is discharged to the outside through the auxiliary air passage 56 (the air passage that sequentially follows the white arrow E2) leading to the suction port 51. That is, the main air passage 55 is an air passage from the indoor side suction port on the lower surface of the casing 1 to the suction port 51 through the notch 30, and the auxiliary air passage 56 is the indoor side suction port on the lower surface of the casing 1. This air path reaches the suction port 51 of the exhaust impeller chamber 22 through the opening 34 of the cover member 28, the opening 29 of the support plate 26, the motor chamber 23, and the communication space 54 in this order. The main air passage 55 and the sub air passage 56 merge at the exhaust impeller chamber 22, and thereafter, as indicated by black arrows, the air outlet 52, the exhaust side suction surface 2d of the heat exchange element 2, and the exhaust side The blowout surface 2b and the outdoor side air outlet 4 of the main casing 1 are sequentially discharged to the outside.
[0022]
The auxiliary air passage 56 is an air passage for cooling the motor 15 and is set to a minimum air volume necessary for cooling the motor 15. That is, the air volume of the auxiliary air path 56 is set to a very small air volume compared to the main air path 55.
Next, with reference to FIG. 3, a process of assembling the present ventilation device A will be described. The main casing 1 is placed on a desk surface or the like with the opening 1a facing upward. One attachment member 24 for attaching the motor 15 is attached in advance to the top plate 10 of the main body casing 1. First, the first divided body 19 of the fan casing 18 is inserted from above through the opening 1a, and is pushed in until the three side plates 11 to 13 of the main body casing 1 come into contact with the top plate 10 as a guide.
[0023]
Next, after the motor 15 with the impellers 16 and 17 is mounted on the first divided body 19, the other mounting member 25 is fixed to the one mounting member 24 with screws, and the motor is driven by both mounting members 24 and 25. The motor 15 is fixed to the main casing 1 by sandwiching 15 bearing portions (not shown) from above and below.
Next, the second divided body 20 of the fan casing 18 is inserted through the opening 1a from above, and is pushed in until the three side plates 11 to 13 of the main body casing 1 are in close contact with the first divided body 19. Thereafter, the support plate 26 with the electrical component 27 is inserted into the main body casing 1 and fixed to the main body casing 1 (specifically, to a mounting stay (not shown) provided in the main body casing 1) with screws. By bringing the support plate 26 into contact with the lower surface 44 of the second divided body 20 (because it is upside down during assembly, the lower surface 44 faces upward), the fan casing 18 is The support unit 26 and the top plate 10 are sandwiched and fixed to complete the assembly of the fan unit U.
[0024]
A positioning stopper (not shown) for preventing the fan casing 18 from moving toward the heat exchange element 2 is provided on each of the first side plate 11 and the second side plate 12 of the main casing 1. These stoppers may be engaged with grooves formed in the divided bodies 19 and 20 inserted into the main body casing 1 to guide the insertion of the divided bodies 19 and 20. The support plate 26 is screwed to an attachment stay (not shown) provided in the main body casing 1.
[0025]
Thus, in this embodiment, after each component which comprises the fan unit U is inserted in the main body casing turned upside down in order and stacked, the fan unit U is completed by attaching the support plate 26. Can be made. Conventionally, the parts constituting the fan have been temporarily assembled outside the main body casing and then inserted into the main body casing for assembly. However, in the present invention, the parts are incorporated directly into the main body casing 1. As a result, it is possible to eliminate the temporary assembly work that has been necessary in the prior art. As a result, the number of assembling steps can be reduced and the manufacturing cost can be reduced.
[0026]
Further, when the divided bodies 19 and 20 of the fan casing 18 are incorporated in the main body casing 1, the side plates 11 to 13 of the main body casing 1 can be used as guide surfaces and positioning surfaces, which facilitates assembly. In addition, the manufacturing cost can be further reduced by reducing the number of parts and the number of assembling steps as compared with the case where members constituting the guide surface and the positioning surface are separately formed.
[0027]
In particular, since both fans for supplying and exhausting air are configured as an integrated fan unit U, both fans can be assembled together by a simple stacking operation.
In addition, by removing the grill 60 and the cover member 28, the electrical component 27 can be easily exposed to the lower indoor space through the opening 1 a of the main body casing 1, so that many other members must be removed. Compared with the case where it does not become, the maintenance with respect to the electrical component 27 can be performed very easily. In addition, since the support plate 26 for attaching the fan casing 18 to the main body casing 1 also serves as an attachment plate for the electrical component 27, compared with a case where the attachment plate for the electrical component 27 is configured separately, the component cost and Manufacturing costs can be reduced through reduction in assembly costs.
[0028]
In the present embodiment, the air passage is configured so that the auxiliary air passage 56 that passes through the motor chamber 23 and the main air passage 55 that does not pass through the motor chamber 23 are both guided to the same side of the air supply impeller 17. In response to this, an inexpensive single suction type impeller could be used. Further, since the impeller 17 is a single suction type, the ratio of the air volume of the auxiliary air passage 56 passing through the motor chamber 23 and the air volume of the main air passage 55 not passing through the motor chamber 23 can be set as desired. As a result of being able to set the air volume of the auxiliary air passage 56 passing through 23 to the minimum necessary air volume capable of cooling the motor 15, adhesion of dust to the drive shaft 15a of the motor 15 can be suppressed. Therefore, it is possible to prevent deterioration of the drive shaft 15a and the bearing that supports the drive shaft 15a, and to improve the life of the drive shaft 15a and the bearing. Further, if outdoor air is used for cooling the motor 15, there is a risk that dust including sand or the like may be sucked to promote deterioration of the drive shaft 15a. Since the motor 15 is cooled by using it, there is no possibility of reducing the life of the drive shaft 15a and the like.
[0029]
In addition, since the peripheral wall of the motor chamber 23 is partitioned by the fan casing 18, the manufacturing cost can be reduced as a result of reducing the component cost and the assembly cost as compared with the case where another member is provided to partition the motor casing 23. Can do.
In addition, a communication space 54 that communicates the motor chamber 23 and the suction port 51 of the exhaust impeller chamber 22, which is indispensable for the air path passing through the motor chamber 23, includes a recess 53 formed in the first divided body 19 and the main body. Since it is formed between the top plate 10 of the casing 1, the communication space 54 can be formed simply by incorporating the fan casing 18 (first divided body 19) into the main body casing 1. Therefore, as compared with the case where the communication space is formed using a member different from the fan casing 18, the manufacturing cost can be reduced through the reduction of the component cost and the assembly cost.
[0030]
Further, since the peripheral walls of the two impeller chambers 21 and 22 and the motor chamber 23 can be collectively formed by the fan casing 18, the manufacturing cost can be reduced through the reduction of the component cost and the assembly cost as compared with the case where these are formed separately. Can be made cheaper.
In this embodiment, both the air supply and exhaust fans are collectively configured as a fan unit. However, each fan is configured by an individual motor, an impeller, and a fan casing, and each fan is configured separately. You may do it.
[0031]
Moreover, in the said embodiment, although the thing of the ceiling embedding type of the type which has arrange | positioned the grill 60 for supplying / exhausting to the lower surface which faces the room | chamber interior of the main body casing 1 was shown as a heat exchange ventilation apparatus, The present invention is not limited, and the present invention can also be applied to a ceiling-embedded type that is completely accommodated in the space behind the ceiling and is entirely supplied and exhausted through a duct. Further, the present invention can also be applied to a ceiling-suspended type or a type attached to a part other than the ceiling of a building.
[0032]
Further, in the above embodiment, the maintenance of the electrical component 27 is performed by opening the grill 60. However, in a type in which the grill for supplying and exhausting air is not provided, a maintenance lid provided on the lower surface is provided. Just open and close for maintenance.
[0033]
【The invention's effect】
According to the first aspect of the present invention, the air passage is configured such that the air passage passing through the motor chamber and the air passage not passing through the motor chamber are both guided to the same side of the impeller, and an inexpensive single suction is provided accordingly. Since the shaped impeller is used, the manufacturing cost can be reduced. In addition, because it is a single suction type, the air volume passing through the motor chamber can be set to the minimum necessary air volume that can cool the motor, and as a result, the adhesion of dust to the motor drive shaft, etc. can be suppressed, As a result, the lifetime of the drive shaft and the bearing that supports the drive shaft can be improved.
Further, when the divided parts of the fan casing are incorporated in the main body casing, the side plates of the main body casing can be used as guide surfaces and positioning surfaces, so that assembly is facilitated. Compared with the case where the members constituting the guide surface and the positioning surface are separately formed, the manufacturing cost can be further reduced by reducing the number of parts and the number of assembly steps.
[0034]
In the invention described in claim 2, since the communication space for configuring the route passing through the motor can be formed by the fan casing and the main body casing, compared to the case where the communication space is formed by using a member different from both of the above. Thus, the manufacturing cost can be further reduced by reducing the component cost and the assembly cost .
[Brief description of the drawings]
FIG. 1 is an exploded perspective view showing a schematic configuration of a heat exchange ventilator according to an embodiment of the present invention.
FIG. 2 is a partially broken perspective view of the apparatus as viewed from below during maintenance.
FIG. 3 is a partial cross-sectional exploded perspective view of the apparatus.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 Main body casing 2 Heat exchange element S Supply air E, E1, E2 Exhaust 10 Top plate 15 Motor 16 Supply impeller 17 Exhaust impeller 18 Fan casing 21, 22 Impeller chamber 23 Motor chamber 51 Suction port 53 Recessed part 55 Main air passage (air passage not via the motor room)
56 Secondary air passage (air passage via motor room)

Claims (2)

In a box-shaped main casing (1), a heat exchange element (2) and a pair of air supply (S) and exhaust (E, E1, E2) flows that intersect at the heat exchange element (2) are generated. In a heat exchange ventilator containing a fan,
At least one fan is coaxially connected to the motor (15) and is a single-suction impeller (17) that sucks air from the opposite side of the motor (15), and an impeller chamber housing the impeller (17) (22) and a fan casing (18) with compartments formed,
The fan casing (18) defines at least a part of the motor chamber (23) containing the motor (15),
The impeller chamber (22) forms a suction port (51) corresponding to the suction side of the housed impeller (17), and this suction port (51) is routed through the motor chamber (23). The air is sucked in through the air passage (56) and the air passage (55) that does not pass through the motor chamber (23) ,
The fan casing (18) is composed of first and second divided bodies (19, 20) which are divided into upper and lower parts ,
Heat exchange ventilator, characterized in that three sides are positioned in contact to corresponding three side plate of the main casing (1) (11 to 13) of each divided member (19, 20). 2. The heat exchange ventilator according to claim 1, wherein the air passage (56) passing through the motor chamber (23) communicates with the motor chamber (23) and the inlet (51) of the impeller chamber (22). The communication space (54) includes a space (54), and is formed between a recess (53) formed in the upper part of the fan casing (18) and the top plate (10) of the main casing (1). A heat exchange ventilator characterized by

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