JPH0219320B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION Field of Industrial Application The present invention relates to a heat exchange type blower that blows air independently on both sides of an impeller and exchanges heat between the blown air.

BACKGROUND ART Conventionally, in this type of heat exchange type blower, sealing between fluids on a high temperature side and a fluid on a low temperature side has been a problem.
Therefore, the inventors have proposed a configuration as shown in FIGS. 1 to 3. That is, a U-shaped flexible sealing member 3 is attached to the flat end surface of the outer circumferential plate 2 of the impeller 1 by adhesive, welding, etc., and is sealed with the partition plate 4. In the figure, 5
1 is an inner circumferential plate of the impeller 1, 6 is a blade of radially arranged corrugated thin plates constituting the impeller 1, and 7 and 8 are a high-temperature side fluid and a low-temperature side fluid.

Problems to be Solved by the Invention In the heat exchange type blower having the above configuration, it is necessary to pre-process the sealing member into a U-shape by a method such as pressing, and there is a difficulty in positioning the sealing member 3 with respect to the outer peripheral plate 2. The holding power is not good enough. This sealing member 3 sandwiches the partition plate 4 from both sides and prevents the high-temperature fluid from mixing with the low-temperature fluid due to the action of centrifugal force and wind force generated by the rotation of the impeller 1.
The contact pressure of the sealing member 3 against the partition plate 4 varies depending on the initial shape of the sealing member 3, that is, the opening angle of the U-shape, and the balance between centrifugal force and wind force. If the opening angle of the seal member 3 is large, a gap will be created between the partition plate 4 and the seal member 3, resulting in a decrease in sealing performance.On the other hand, if the opening angle is small, the contact pressure will become large, increasing the torque required to rotate the impeller 1, and causing a gap between the partition plate 4 and the seal member 3. Since the wear and deterioration of the sealing member 3 progresses, it is important to set the initial shape of the sealing member 3, but this setting is difficult.

Therefore, the present invention improves the positioning and holding force of the seal member with respect to the outer circumferential plate, and furthermore, makes it easier to control the fluid pressure acting on the seal member, thereby stabilizing the seal performance and impeller drive torque. The purpose is to prevent wear and deterioration.

Means for Solving the Problems In order to achieve the above object, the heat exchange type blower of the present invention includes a blade, a main plate that supports the inner peripheral part of the blade, a main plate that supports the outer peripheral part of the blade, and a guide groove on the outer peripheral end surface. It consists of a peripheral plate having a
It includes an impeller that blows air independently on both sides, a partition plate that separates the airflow on both sides at the outer periphery of the impeller, and a flexible sealing member, and the sealing member has a substantially U-shape in the guide groove. The sealing member is attached in a shape to close the gap between the outer circumferential plate and the partition plate, and the outer circumferential end of the sealing member protrudes into the air flow;
The side walls of the outer circumferential plate are configured to protrude into the air flow on both sides.

Effects In the heat exchange type blower of the present invention, the guide groove provided on the outer circumferential plate with the above configuration facilitates positioning when attaching the seal member to the outer circumferential plate, and the seal member is corrected by the inner wall of the guide groove, and the seal member is corrected by the inner wall of the guide groove. In addition to improving the holding force, it becomes possible to control the airflow acting on the sealing member by the side wall of the outer circumferential plate projecting into the airflow. Thereby, the contact pressure of the seal member against the partition plate can be appropriately controlled, the seal performance and the driving torque of the impeller can be stabilized, and the wear and deterioration of the seal member can be prevented.

Embodiment Hereinafter, an embodiment of the present invention will be described based on the accompanying drawings. In FIG. 5, reference numeral 11 denotes a partition plate that separates the high-temperature side fluid 9 and the low-temperature side fluid 10, and is located on the outer periphery of the impeller 13. 1
2 is a sealing member made of flexible felt or the like, and 13 is an impeller of a heat exchange type blower. Reference numeral 14 denotes an outer circumferential plate provided on the outer circumferential portion of the impeller 13, and a U-shaped guide groove 15 is provided on the entire circumference of the outer circumferential end face, and its side walls 15' are shaped to protrude into the air flow on both sides. The sealing member 12 is band-fastened to the guide groove 15 with a wire or the like at its center portion, and is held in a substantially U-shape to close the gap between the outer circumferential plate 14 and the partition plate 11, and the sealing member 12
The outer peripheral edge of is held projecting into the airflow. Note that the sealing member 12 may be held in the guide groove 15 by adhesive or the like. Reference numeral 16 denotes blades constituting the impeller 13, which are made of corrugated thin plates arranged radially. Although not shown, the impeller 13 has an inner circumferential plate similar to that shown in FIG. 1, and is housed within the casing.

To explain the operation in the above configuration, rotation of the impeller 13 causes centrifugal force acting on the seal member 12 and fluid discharged radially along the surface of the blade 16 to the side wall 15' protruding into the air flow of the outer peripheral plate 14. The shape of the seal member 12 is changed so as to narrow the opening angle of the U-shape by a force commensurate with the change in momentum when the seal member 12 is guided by the seal member 12 and changes direction by colliding with the seal member 12. As a result, the sealing member 12 is pressed against the end edge 11' of the partition plate 11 and slides, causing the high-temperature side fluid 9 and the low-temperature side fluid 10 to slide.
This prevents contamination with Said seal member 12
If the degree of protrusion of the side wall 15' of the outer circumferential plate 14 into the air flow is set to an appropriate value in consideration of the balance between centrifugal force and wind force acting on the partition plate 11, the amount of shape change of the sealing member 12 can be controlled. It is possible to prevent a decrease in sealing performance due to poor contact between the seal member 12 and the seal member 12, and conversely, an increase in driving torque of the impeller 13 and progress of wear of the seal member 12 due to excessive contact pressure can be prevented. Moreover, by providing the guide groove 15, attachment and positioning of the seal member 12 to the outer circumferential plate 14 are facilitated, and the holding force of the seal member 12 is improved.

FIG. 5 shows another embodiment. The same parts as in Figure 4 are given the same numbers. Reference numeral 17 designates an outer circumferential plate having a guide groove 18 for molding and holding the seal member 12 on its end face, and further having a side wall 18' with only the guide groove 18 portion protruding into the air flow on both sides. Due to the rotation of the impeller 13, the fluid flowing out along the blades 16 can be guided along the side wall 18' of the outer circumferential plate 17 with little loss. Then, a part of the force corresponding to the change in momentum is applied to the outer circumferential plate 17, so it is possible to adjust the wind force acting on the seal member 12 depending on the degree of protrusion of this side wall 18'.
Similar to the illustrated embodiment, the partition plate 11 and the seal member 12
It is possible to easily prevent deterioration in sealing performance due to poor contact between the two, and to prevent an increase in driving torque of the impeller 13 and progression of wear of the seal member 12 due to excessive contact pressure between the two.

In this embodiment, an impeller with a single wave-shaped blade is used, but an impeller with blades on both sides of a single flat plate, as is conventionally known, may also be used. good. In short, any structure is sufficient as long as it can blow air independently on both sides and exchange heat between the blown air.

Effects of the Invention As is clear from the above embodiments, the heat exchange type blower of the present invention has a guide groove for holding the seal member on the outer circumferential plate of the impeller, so that positioning of the seal member on the outer circumferential plate is easy. By improving the holding force of the seal member and selecting the degree of protrusion of the side wall of the outer circumferential plate into the air flow, it is possible to optimize the contact pressure between the seal member and the partition plate. This prevents deterioration of sealing performance, increase in driving torque of the impeller due to excessive contact pressure, and abrasion and deterioration of the sealing member.

[Brief explanation of drawings]

Figure 1 is a sectional view showing an example of the heat exchange type blower proposed earlier, Figure 2 is a perspective view of the same impeller,
FIG. 3 is an enlarged cross-sectional view of the main parts, FIG. 4 is an enlarged cross-sectional view of the main parts of a heat exchange type blower according to one embodiment of the present invention, and FIG. 5 is a main part of a heat exchange type blower according to another embodiment. It is an enlarged sectional view. 11... Partition plate, 12... Seal member, 13...
... Impeller, 15, 18 ... Guide groove, 15', 1
8'...Side wall.

Claims (1)

[Claims] 1. An impeller that is composed of a blade, a main plate that supports the inner periphery of the blade, and an outer peripheral plate that supports the outer periphery of the blade and has a guide groove on the outer peripheral end surface, and that blows air independently on both sides, and this impeller. includes a partition plate that separates airflow from both sides at the outer circumferential portion of the frame, and a flexible sealing member, and the sealing member is attached to the guide groove in a substantially U-shape so that the outer circumferential plate and the partitioning plate are connected to each other. A heat exchange type blower that closes a gap and has an outer peripheral end of a substantially U-shaped sealing member projecting into the airflow, and side walls of the outer peripheral plate projecting into the airflow on both sides.