JPH09137984A - Ventilator - Google Patents

Abstract

PROBLEM TO BE SOLVED: To firmly fix a blower in a ventilator without using any special part therefor. SOLUTION: An apparatus has an air supply blower 2 for forming a current of supplied air, an air discharge blower 3 for forming a current of discharged air, and a heat exchanger 4 for heat exchange between the supplied air and discharged air, all set inside a box-shaped main body casing 1. In this instance a blower casing 11 for the air supply blower 2 and the air discharge blower 3 is formed as a structure integrally having air passageway-forming parts which make the current of supplied air and the current of discharged air pass, each current in a separated state from the other, through a scroll part 17 having suction ports 14, 20 and outlets. By placing this structure in the main body casing 1 in a manner of fitting them together the scroll part 17 and the air passageway-forming parts are placed in contact with the inner sides of the main body casing 1 so as to be fastened to one another.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention belongs to the field of ventilation devices provided with a heat exchanger for exchanging heat between exhausted air and supplied air.

[0002]

2. Description of the Related Art Heat exchange for exhausting polluted indoor air while allowing a newly selected outdoor air to be supplied indoors to a ventilator adopting a simultaneous air supply / exhaust type ventilation system to perform continuous heat exchange between air supply and exhaust. Ventilators with built-in devices are widely used because they can ventilate while suppressing fluctuations in state quantities. This type of ventilator is also called a heat exchange ventilator, and its basic configuration is that the blower that forms the exhaust flow, the blower that forms the air supply flow, and the heat exchanger that performs heat exchange between the air supply and exhaust air in the casing. It is a built-in one.

As is well known, the heat exchanger used in this type of device is often a laminated heat exchanger in which heat transfer plates are stacked as corrugated plate-shaped corrugated plates to form a hexahedron having square end faces. . For example, Japanese Patent Laid-Open No. 6-2909 discloses a ventilator in which the heat exchanger 101 described above is incorporated in the center of a box-shaped main body casing 102 as shown in FIG. In this ventilation device, an air supply blower 103 and an exhaust blower 104 are incorporated in a main body casing 102 so as to sandwich the heat exchanger 101. Inside the main body casing 102, two systems of ventilation passages are formed, which are an air supply passage for passing a supply air flow and an exhaust passage for passing an exhaust flow. A part of the exhaust passage is a heat exchanger 1 incorporated in the main body casing 102.
01 primary fluid passage, and a part of the air supply passage is constituted by the secondary fluid passage of the heat exchanger 101, and both are separated from each other over the entire passage.

The air supply passage has an intake end provided at one side of the main body casing 102 as an inlet end and has a heat exchanger 101.
The secondary fluid passage is passed through the air supply blower 103 to form a series of passages having the air supply outlet provided on the other side surface of the main body casing 102 as an outlet end. Further, the exhaust passage has an exhaust suction port provided side by side with the air supply outlet on one side of the main body casing 102 as an inlet end, and the heat exchanger 101
It is configured as a series of passages having an exhaust outlet provided at the other side of the main body casing 102 side by side through the primary fluid passage through the exhaust blower 104 and the supply inlet, and having an outlet end. Both the air supply blower 103 and the exhaust blower 104 have a side plate having a suction port attached to the open portion of a scroll type blower casing open on one side in a lid shape with screws or the like, and a motor for rotating the impeller 105 on the side plate. The main body casing 10 has a configuration in which 106 is fixed, and a side plate that also serves as a motor mounting member and a fixing bracket provided on a part of the blower casing are used.
It is firmly fixed to 2 with screws. In this ventilation device, the air supply blower 103 and the exhaust air blower 104 are provided with two suction ports 107 on opposite surfaces so as to reduce the interference of the suction air in the motor 106 and obtain a large air volume.

[0005]

In the conventional ventilation device as described above, the air supply blower 103 and the exhaust air blower 104 are provided.
Is troublesome, and many parts are required to fix them to the main body casing 102, resulting in a high cost.
In addition, in the case where the side plate is attached to the blower casing with screws, there is a problem that airtightness of the part is difficult to be maintained and air leakage easily occurs unless the number of fastening points is increased. However, there is also a problem that the airflow passing through the outside of the blower casing toward the one suction port 107 often does not flow smoothly depending on the shape of the blower casing.

The present invention has been made in order to solve the above-mentioned conventional problems, and its object is to make it easy to assemble the blower without using any special parts. To reduce the number of parts and reduce the cost of ventilation equipment, to prevent blower air leaks and to smooth the flow of suction air to improve performance. It is to be.

[0007]

In order to achieve the above object, the invention of claim 1 is a ventilator in which a supply air blower, an exhaust air blower and a heat exchanger are incorporated in a box-shaped main body casing. Regarding, the blower casing of the blower for air supply and the blower for exhaust, a structure in which the air passage forming portion for separately circulating the air supply flow and the exhaust flow in the scroll portion having the suction port and the blowout port is integrally formed. A means for putting the scroll body and the air passage forming portion into contact with the inner surface of the main body casing to bring the entire structure into a restrained state is adopted by accommodating the structure body in the main body casing in a fitted state.

In order to achieve the above object, the invention of claim 2 makes one side of the scroll portion of the blower casing in the means according to claim 1 open, and the air introducing plate having an opening at the center of the opening is uneven. A means for attaching to the air introduction plate a motor for rotating an impeller that rotates in the scroll part is adopted by forming a suction port by the opening of the air introduction plate that is closed by mounting on the end face by fitting.

In order to achieve the above object, the invention of claim 3 provides a suction port at one end side of the scroll part of the blower casing in the means according to claim 1 and opens the other end side of the blower casing so that the opening part has a central portion. A scroll-shaped air introduction plate with an opening is attached to the lid shape, and another suction port is formed by this opening, and a motor that rotates an impeller that rotates in the scroll is attached to the air introduction plate. Adopt a means to attach.

In order to achieve the above-mentioned object, the invention of claim 4 is a means for fixing both ends of the air introducing plate in the means according to claim 2 or claim 3 to the main body casing by detachable fixing means. To adopt.

[0011]

1 to 8 show a ventilation device according to an embodiment of the invention. The ventilator shown in FIG. 1 has a rectangular box-shaped main body casing 1 in which an air supply blower 2, an exhaust blower 3 and a heat exchanger 4 are incorporated. As shown in FIG. 5, the main body casing 1 has a base structure 5 in which a bottom portion and left and right side portions are integrally formed, and a front plate 6 and a rear plate 7 each of which form a front portion and a rear portion, respectively, are fixed to the upper opening. It is configured by covering and closing the top plate 8. A channel-shaped rail 9 is fixed in the center of the inner surface of the bottom of the base structure 5 in the front-rear direction, and two vent holes are formed in the left and right side portions side by side in the front-rear direction. An inspection port is opened in the center of the front plate 6, and a removable inspection lid 10 is attached to the outside of the inspection port. A rail 9 facing the bottom rail 9 is fixed to the top plate 8 at the center of the inner surface.

The heat exchanger 4 is incorporated in the main body casing 1 by the upper and lower rails 9 so that the heat exchanger 4 can be inserted and removed from the inspection port. As shown in FIG. 1, the heat exchanger 4 has a structure in which a heat exchange element having a laminated structure in which heat transfer plates are laminated in a plurality of layers with corrugated plate-shaped corrugated plates sandwiched therebetween is reinforced by a frame.
The heat exchange element is configured as a quadrangular prismatic hexahedron as a whole, in which a primary fluid passage through which an exhaust gas flow passes and a secondary fluid passage through which a supply air flow passes are separated and intersect inside. The frame consists of an end holding part that covers both end faces of a square that is a small edge of the heat exchange element, and four frame parts that respectively cover four ridge corners running in parallel of the heat exchange element. It is made of resin. Frames on diagonal lines are slidably fitted to the upper and lower rails 9 of the main body casing 1.

As shown in FIGS. 2 and 3, an air supply blower 2 and an exhaust blower 3 are incorporated on the left and right sides of the heat exchanger 4 in the main body casing 1. In this embodiment, the air supply blower 2 is incorporated on the left side of the heat exchanger 4 as shown in FIG. 1, and is composed of a blower casing 11, an impeller 12, and a motor 13 for rotating the same. Further, the exhaust blower 3 is incorporated on the right side of the heat exchanger 4 as shown in FIG. 1, and is composed of a blower casing 11, an impeller 12, and a motor 13 for rotating the same. Air blower 2
The blower casing 11 of the exhaust blower 3 has basically the same configuration.

That is, the blower casing 11 is shown in FIGS.
As shown in FIG. 1, the scroll portion 1 has a suction port 14 opened at one side and a blowout port 16 opened at an end of a curved duct portion 15.
7, an air passage forming portion that separates and distributes the supply air flow and the exhaust air flow is configured as a integrally formed structure. Suction port 14 excluding duct part 15 of scroll part 17
A side portion opposite to the side is opened in a scroll shape, and a scroll-shaped metal air introduction plate 18 having a bellmouth-shaped opening portion in the center is formed into a series of fitting grooves formed on the end surface of the opening portion. It is mounted by fitting the peripheral edge into 19. Another opening 20 is formed by the opening of the air introduction plate 18. A motor 13 that rotates an impeller 12 that rotates in the scroll portion 17 is fixed to the outside of the air introduction plate 18 on the center line of the suction port 20 by a motor mounting leg 21 that is mounted so as to straddle the suction port 20.

The blower casing 11 as the whole of the scroll portion 17 and the air passage forming portion has an outer shell shape in which the upper, lower, front and rear and one side are fitted closely to the inner surface of the main casing 1 in the storage space of the main casing 1. It is molded from synthetic resin. That is, the blower casing 11
By being housed in the main body casing 1 in a fitted state, the scroll portion 17 and the air passage forming portion come into contact with the inner surface of the main body casing 1, and the whole is kept in a restrained state without any special fixing means. Specifically, the air passage forming portion is formed toward the duct portions 15 and 22 of the two systems, the partition portion 23 formed in a substantially horizontal shape in the middle portion in the height direction, and the suction port 14 on the side opposite to the motor. It is composed of an airflow guide portion 24.

Of the ducts 15 and 22 of the two systems, which are continuous with the scroll portion 17, the air outlet 16 which is the opening end communicates with one of the vents on one side of the main body casing 1 with the packing sandwiched therebetween. And the other duct part 2
2 is formed in a straight line on the opposite side of the duct portion 15, and one open end thereof communicates with the other vent hole on one side of the main body casing 1 with the packing sandwiched therebetween. The outer portion of the duct portion 22 is formed in a plate shape as a vertical contact surface 25, and the other open end is formed in a lower position and opens toward the lower side of the heat exchanger 4. This duct part 22
The lower surface of is flat and is flush with the contact surface 26 formed on the lower surface of the scroll portion 17. The upper surface of the duct portion 22 is continuous with the upper surface of the one air flow guide portion 24, and the contact surface 27 formed on the upper surface of the scroll portion 17 and the upper surface of the other air flow guide portion 24 are the same surface. It is in. further,
The end surface of the partition portion 23 bulges from the scroll portion 17 so that the end surface contacts the inner surface of the main body casing 1.

A fitting groove is formed on the end face on the heat exchanger 4 side of the partition part 23 of the blower casing 11, and the fitting groove forms a partition between the frame forming the left and right ridges of the heat exchanger 4. A partition member 28 is installed to vertically partition the inner end surface of the portion 23 and the lower portion of the scroll portion 17. A groove 29 into which the frame of the heat exchanger 4 is slidably fitted is formed at the inner end of the partition member 28. Since the illustrated ventilation device is provided with the bypass 30 that bypasses the heat exchanger 4, the blower casing 11 on the exhaust blower 3 side is provided.
The entrance structure to the bypass 30 that is opened and closed by a damper,
Although there is a slight difference in the configuration regarding the bypass 30 in terms of the configuration, the configuration is basically as described above.

In this ventilator, the main body casing 1 with the top plate 8 removed is assembled, and the air supply blower 2 and the exhaust air blower 3 are fitted and accommodated in the storage portions inside the main body casing 1, respectively. Partition 2 of casing 11
After the partition members 28 are fitted and attached to the three ends, respectively, the top plate 8 is attached to cover the upper part of the main body casing 1, and finally the heat exchanger 4 is inserted from the inspection port to the upper and lower rails 9 and each partition member 2.
The assembly is completed by fitting the ridge corners into the groove 29 of No. 8 and pushing them in. As the top plate 8 is fixed, the upper and lower sides, front and rear sides, and side portions of the blower casings 11 are closely contacted with the inner surface of the main body casing 1 and are supported in a restrained state. The contact portion with the main body casing 1 has several large contact surfaces 25,
Since 26 and 27 are set, the blower casing 11 is held in a very stable and stable state. Therefore, the stable state of the blower casing 11 is maintained without the need for any special fixing means or metal fittings, the assembling work becomes very easy, and the parts such as screws which have been used conventionally are not necessary. .

7 and 8, the motor mounting leg 21 is provided with L-shaped auxiliary metal fittings 31 or flanges 31a at both ends, and the auxiliary metal fittings 31 or flanges 31a are screwed to the inner surface of the main body casing 1. There is. As a result, the motor 13 portion and the blower casing 11 are in a more stable mounting state, but the fitting groove 1 on the end surface of the scroll portion 17 is
By setting the fitting relationship due to the unevenness of the end edges of the air introduction plate 18 and the air introduction plate 18 to be strong, the auxiliary metal fitting 31 and the flange 31a can be omitted as shown in FIG. This fitting is also effective for maintaining the airtightness of the relevant part, and is smaller in number of parts than mounting by screws and can prevent air leakage, so that it is effective in terms of cost and performance. In addition, auxiliary metal fittings 31 or flanges 31 for maintenance and inspection.
Since the motor 13 and the air introducing plate 18 are not separated from the scroll portion 17 even if the screw a is removed from the main body casing 1, the air introducing plate 18 and the motor 13 are prevented from being accidentally dropped and inspection work can be performed. There is also an advantage that it becomes easier.

The blower casing 11 is the main casing 1
Intimately contacting the fan casing 1 with a plurality of wide surfaces results in filling the space of the relevant portion of the main body casing 1.
1 serves to support the main body casing 1. Therefore, even if the rigidity of the main body casing 1 is reduced by that amount, a ventilator can be configured without any problem, and the cost can be reduced.

In the ventilation device assembled as described above, in the main body casing 1, two ventilation passages are formed, that is, an air supply passage for passing a supply air flow and an exhaust passage for passing an exhaust flow. Part of the exhaust passage is constituted by the primary fluid passage of the heat exchanger 4 incorporated in the main body casing 1, and part of the air supply passage is constituted by the secondary fluid passage of the heat exchanger 4,
Both are separated from each other over the entire route.

The air supply passage has an air supply inlet 32, which is a vent provided on one side of the main body casing 1, as an inlet end, and heat is exchanged from a duct portion 22 formed in the blower casing 11 of the exhaust blower 3. It is configured as a series of passages having a supply air outlet 33, which is a ventilation port provided on the other side surface of the main body casing 1, as an outlet end, passing through the secondary fluid passage of the device 4 and the duct portion 15 of the air supply blower 2. ing. In addition, the exhaust passage has an exhaust inlet 34, which is a vent provided in parallel with the air supply outlet 33 on one side of the main body casing 1, as an inlet end, and from the duct portion 22 of the blower casing 11 of the air supply blower 2. An exhaust outlet 35, which is a vent provided in parallel with the intake air inlet 32 on the other side surface of the main body casing 1 through the primary fluid passage of the heat exchanger 4 and the duct portion 15 of the exhaust blower 3, serves as an outlet end. It is constructed as a series of passages.

The supply air intake port 3 is provided on the supply air passage side.
A bypass 30 that connects the downstream portion of 2 and the upstream portion of the air supply blower 2 is provided side by side. The bypass 30 is opened and closed by a damper, and when the inlet portion is opened by the damper, a bypass flow that bypasses the heat exchanger 4 and reaches the air supply blower 2 is formed. This allows normal ventilation without heat exchange.

Both the air supply blower 2 and the exhaust air blower 3 have suction ports 14 and 20 on the opposite surfaces, and the suction port 14 on the side opposite to the motor is located downstream of the suction port 20 on the side of the motor 13. Therefore, the flow of air to the suction port 14 on the side opposite to the motor tends to lack smoothness, but both the scroll portion 17 of the blower casing 11 and the air introduction plate 18 are scroll-shaped and do not project outward. Moreover, the air flow guide 24
Is provided toward the suction port 14, so that the air smoothly flows into the suction port 14. That is, the blowing performance is improved.

[Brief description of the drawings]

FIG. 1 is a perspective view showing a configuration of a ventilation device according to an embodiment of the invention.

FIG. 2 is a perspective plan view showing the configuration of the ventilation device according to the embodiment of the invention.

FIG. 3 is a perspective front view showing the configuration of the ventilation device according to the exemplary embodiment of the present invention.

FIG. 4 is a perspective view showing a configuration of a scroll portion of a blower casing of the ventilation device according to the exemplary embodiment of the present invention.

FIG. 5 is an exploded perspective view of a main part of the ventilation device according to the exemplary embodiment of the present invention.

FIG. 6 is an enlarged cross-sectional view showing fitting of the scroll portion and the air introducing plate portion according to the embodiment of the invention.

FIG. 7 is a perspective view showing another configuration of the air introduction plate portion of the ventilation device according to the exemplary embodiment of the present invention.

FIG. 8 is a perspective view showing another configuration of the air introduction plate portion of the ventilation device according to the exemplary embodiment of the present invention.

FIG. 9 is a plan view showing a configuration of a conventional ventilation device.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Main body casing 2 Air supply blower 3 Exhaust air blower 4 Heat exchanger 11 Blower casing 12 Impeller 13 Motor 14 Suction port 15 Duct part 16 Air outlet 17 Scroll part 18 Air introduction plate 19 Fitting groove 20 Suction port 21 Motor mounting Leg 22 Duct part 23 Partition part 31 Auxiliary metal fitting 32 Air intake port 33 Air supply outlet 34 Exhaust air inlet 35 Exhaust air outlet

Claims (4)

[Claims] 1. An air supply blower for forming an air supply flow and an exhaust air blower for forming an exhaust air flow in a box-shaped main body casing,
A ventilation device incorporating a heat exchanger for exchanging heat between the air supply flow and the exhaust flow, the air blower casing of the air supply blower and the exhaust air blower having an inlet and an outlet. A structure in which an air passage forming portion for separately circulating a supply air flow and an exhaust air flow is integrally formed in the scroll portion, and the structure is housed in the main body casing in a fitted state to thereby form the scroll portion. A ventilation device, characterized in that the air passage forming portion and the air passage forming portion are in contact with the inner surface of the main body casing so that the whole body is in a restrained state. 2. The ventilation device according to claim 1, wherein one side of a scroll portion of the blower casing is opened, and an air introduction plate having an opening portion at the center of the opening portion is attached to the end surface by concave and convex fitting. And a motor for rotating an impeller rotating in the scroll portion is attached to the air introduction plate while forming a suction port by the opening of the air introduction plate. 3. The ventilation device according to claim 1, wherein a suction port is provided at one end side of the scroll portion of the blower casing, the other end side is opened, and the opening portion has a central opening portion in the opening portion. The air-introducing plate formed in the above is attached to the air-introducing plate as a lid, and another opening is formed by the opening, and a motor for rotating an impeller rotating in the scroll portion is attached to the air-introducing plate. A characteristic ventilation system. 4. The ventilation device according to claim 2, wherein both ends of the air introduction plate are fixed to the main body casing by fixing means that can be attached and detached.