JP3660954B2 - Heat exchange ventilator - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a 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 heat exchange element is accommodated in the main body casing having an opening on the lower surface, and the flow of the supply air and the exhaust gas that intersect at the heat exchange element is respectively generated by a sirocco fan or the like. (For example, refer to JP-A-3-251634). In general, the above-described fan is composed of an impeller surrounded by a fan casing made of foamed resin such as foamed polystyrene, and the fan casing is halved on the left and right.
[0003]
When assembling the heat exchange ventilator, first, the main body casing turned upside down is placed on a desk surface, the opening of the main body casing is facing upward, and the impeller temporarily assembled outside the main body casing The unit including the motor and the left and right fan casings is collectively inserted into the main body casing through the opening from above, and then the respective parts are screwed to attach the fans.
[0004]
[Problems to be solved by the invention]
However, as described above, it has been quite difficult to push the temporarily assembled unit into the main body casing so that the components constituting the unit are not displaced from each other. And if it tries to push in forcibly in the state which raise | generated the position shift, there existed a possibility that a part of fan casing consisting of a polystyrene foam etc. might be damaged. In order to prevent this from happening, the work must be proceeded carefully, and therefore the work efficiency is poor and the assembly takes time. As a result, the manufacturing cost was high.
[0005]
Accordingly, an object of the present invention is to provide a heat exchange ventilator that is easy to assemble and inexpensive to manufacture.
[0006]
[Means for Solving the Problems]
To achieve the above objective,
1) The invention of claim 1
In a heat exchange ventilator that accommodates a heat exchange element and a pair of fans that respectively generate a flow of supply air and exhaust gas that intersect at the heat exchange element in a box-shaped main body casing having an opening on the lower surface,
The impeller of at least one fan is accommodated in a fan casing made of foamed resin, and the fan casing is vertically separated from a horizontal drive shaft of a motor that drives the impeller of the at least one fan. The lower surface of the second divided body is supported by a support plate that is detachably attached to the main body casing, and the motor is mounted on the top plate of the main body casing via an attachment member. A cover member is provided on the lower surface of the main body casing so as to cover at least a part of the opening of the lower surface so as to be openable and openable and closable from the indoor side, and is provided below the second divided body. An electrical component that can be exposed to a lower indoor space through the opening by opening the cover member between the cover member and the support plate is attached to the support plate. Characterized in that it is arranged in a lifting state.
[0007]
In the above configuration, during assembly, through the opening from above in the main body casing placed with the top plate facing down and the opening facing up, the divided body above the fan casing, the motor with the impeller, and A fan can be completed by attaching the support plate after sequentially inserting and stacking the divided parts below the fan casing. Conventionally, the parts constituting the fan are temporarily assembled outside the main body casing and then inserted into the main body casing for assembly. However, in the present invention, the parts can be directly incorporated into the main body casing. As a result, it is possible to eliminate the temporary assembly work that has been necessary in the prior art, thereby reducing the number of assembling steps and reducing the manufacturing cost.
Further, when the cover member is opened, the electrical component is exposed to the lower indoor space through the opening, and maintenance of the electrical component becomes possible.
2) The invention according to claim 2
2. The heat exchange ventilator according to claim 1, wherein the first divided body of the fan casing is in contact with the top plate and a part of the side plates of the main casing, and the second divided body of the fan casing is a part of the main casing. It is in contact with the side plate of the part.
[0008]
In the above configuration, when the first divided body of the fan casing is assembled into the main body casing, the side plate of the main body casing may be used as a guide surface and pushed in until it comes into contact with the top plate of the main body casing. The first divided body is positioned by the side plate and the top plate. Further, when the second divided body is assembled into the main body casing, the side plate of the main body casing may be used as a guide surface and pushed in until it comes into contact with the first divided body. After the assembling, the second divided body is positioned by the top plate. It will be positioned by one division body and a side plate.
3) The invention according to claim 3
3. The heat exchange ventilator according to claim 1 or 2, wherein the motor comprises a double-shaft motor interposed between the impellers of both fans to drive the both impellers at once, and the fan casing collects both impellers at the same time. It consists of things that surround it.
[0009]
In the above configuration, in addition to the operation of the first aspect of the invention, both the fans for supplying and exhausting air can be assembled together by a simple stacking operation .
[0010]
4 ) The invention according to claim 4
4. The heat exchange ventilator according to claim 1, wherein the mounting plate also serves as an electrical component mounting plate.
[0011]
In the above configuration, the manufacturing cost can be reduced through reduction of the component cost and the assembly cost as compared with the case where the mounting plate for the electrical component is separately configured.
[0012]
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.
[0013]
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.
[0014]
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.
[0015]
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.
[0016]
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.
[0017]
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.
[0018]
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.
[0019]
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.
[0020]
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.
[0021]
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.
[0022]
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.
[0023]
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.
[0024]
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.
[0025]
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.
[0026]
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.
[0027]
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.
[0028]
Further, when the divided bodies 19 and 20 of the fan casing 18 are incorporated into 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, so that assembly is facilitated. 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.
[0029]
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.
[0030]
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.
[0031]
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.
[0032]
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.
[0033]
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.
[0034]
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.
[0035]
【The invention's effect】
According to the first aspect of the present invention, the fans can be easily completed by simply assembling the components constituting the fan directly into the main body casing and simply stacking them. In other words, in the past, it has been necessary to temporarily assemble each component constituting the fan as a unit outside the main body casing. However, in the present invention, such a temporary assembling operation can be made unnecessary. Manufacturing costs can be reduced by reducing man-hours. In addition, the maintenance of the electrical components can be performed simply by opening the cover member on the lower surface of the main body casing. As a result, the maintenance can be performed very easily.
[0036]
According to the second aspect of the present invention, when incorporating the main body casing into the main body casing, the inner surface of the main body casing can be easily incorporated into the positioning state as a guide surface or a positioning surface. In addition, the manufacturing cost can be reduced by reducing the number of parts and the number of assembling steps as compared with the case where the members constituting the guide surface and the positioning surface are separately formed.
[0037]
In the invention according to the third aspect, both fans for supplying and exhausting air can be assembled together by a simple stacking operation. As a result, the manufacture becomes easier .
[0038]
According to the fourth aspect of the present invention, the manufacturing cost can be reduced by reducing the component cost and the assembly cost as compared with the case where the mounting plate of the electrical component is configured separately from the support plate.
[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 1a Opening 2 Heat exchange element 10 Top plate 11 1st side plate 12 2nd side plate 13 3rd side plate 14 4th side plate S Air supply E, E1, E2 Exhaust U Fan unit 15 Motor 15a Drive shaft 16 Air supply blade Car 17 Exhaust impeller 18 Fan casing 19 First divided body 20 Second divided body 24, 25 Mounting member 26 Support plate 27 Electrical component 28 Cover member 60 Grill

Claims (4)

Inside the box-shaped body casing (1) with an opening (1a) on the bottom, the heat exchange element (2) and the air supply (S) and exhaust (E, E1, E2) intersecting at this heat exchange element (2) In a heat exchange ventilator containing a pair of fans that respectively generate a flow of
The impeller (16, 17) of at least one fan is accommodated in a fan casing (18) made of foamed resin,
The fan casing (18) includes first and second divided bodies that are vertically arranged with respect to a horizontal drive shaft (15a) of a motor (15) that drives the impeller (16, 17) of the at least one fan. Can be divided into (19,20)
The lower surface of the second divided body (20) is supported by a support plate (26) removably attached to the main casing (1).
The motor (15) is fixed to the top plate (10) of the main body casing (1) via mounting members (24, 25) ,
A cover member (28, 60) is provided on the lower surface of the main casing (1) so as to openably open at least a part of the opening (1a) on the lower surface and can be opened and closed from the indoor side .
During the second split body (20) said cover member a lower (28,60) the support plate (26), an opening by opening said cover member (28,60) (1a ), The electrical component (27) that can be exposed to the lower indoor space is arranged in a state of being supported by the support plate (26) . The heat exchange ventilator according to claim 1, wherein the first divided body (19) of the fan casing (18) includes the top plate (10) and a part of the side plates (11, 12, 13) of the main body casing (1). a is in contact, the second split body of the fan casing (18) (20), the heat exchange ventilation, characterized in that in contact with a portion of the side plate of the main casing (1) (11, 12, 13) Equipment . The heat exchange ventilator according to claim 1 or 2, wherein the motor (15) is interposed between the impellers (16, 17) of both fans and drives both the impellers (16, 17) collectively. A heat exchange ventilator comprising a motor (15), wherein the fan casing (18) surrounds both the impellers (16, 17). In the heat exchange ventilator according to any one of claims 1 to 3, the heat exchange ventilator, characterized in that the support plate (26) also serves as a mounting plate of the electrical component (27).

Images