JPH0533364Y2 - - Google Patents

Description

[Detailed Description of the Invention] [Industrial Application Field] The present invention relates to a switching device that opens and closes an opening through which a fluid passes.

[Prior Art] Generally, as a switching device for opening and closing an opening through which a fluid passes, there is a switching device using a plate-shaped damper as shown in FIG. This is achieved by disposing a plate-shaped damper 101 in the opening 100 through which the fluid passes, and rotating the rotation shaft 102 provided at the end of the plate-shaped damper 101. 100 was being opened and closed.

In this case, the plate damper 101
When rotating toward the upstream side of the fluid,
Subject to the pressure of fluid passing through opening 100. As a result, in order to rotate the plate-shaped damper 101, a drive device that generates a driving force sufficient to overcome the pressure of the fluid is required. Therefore, plate damper 1
If the pressure of the fluid that is received when the damper 01 rotates toward the upstream side of the fluid can be reduced, the drive device that rotates the plate-shaped damper 101 can be downsized.

For this reason, a butterfly-type opening and closing device has been used in the past, in which the rotating shaft 202 is located at the center of the plate damper 201, as shown in Fig. 7. Because the rotating shaft 202 is located at the center of the plate damper 201, half of the plate damper 201 rotates toward the upstream side of the fluid passing through the opening 200 and receives pressure from the fluid, while the other half rotates toward the downstream side of the passing fluid and is biased by the fluid pressure. For this reason, when the plate damper 201 rotates, the magnitude of the pressure it receives from the fluid passing through the opening 200 is smaller than that of the plate damper 101 shown in Fig. 6, and the drive device for driving the plate damper 201 can be made smaller in size.

[Problems to be solved by the invention] However, when the butterfly-type opening/closing device shown in FIG. There was a problem in that about half of the damper 201 protruded outside of the opening 200.

This invention was made in view of the above circumstances,
The purpose is to provide a switchgear in which the fluid pressure applied to the damper is reduced and the amount by which a portion of the damper protrudes beyond the opening is reduced.

[Means for Solving the Problems] In order to achieve the above object, the present invention includes a support member rotatably supported at one end, and a support member supported at the other end of the support member. A plate-shaped opening/closing member that opens and closes an opening through which fluid passes as the opening/closing member rotates, and a drive means that rotates the plate-shaped opening/closing member via the supporting member. The technical means is to have a rotation center at a position a predetermined distance away from the plate-shaped opening/closing member within the opening plane of the opening.

[Operation and Effects of the Invention] In the present invention having the above configuration, the rotation center of the support member that supports the plate-shaped opening/closing member is provided at a position separated from the plate-shaped opening/closing member by a predetermined distance within the opening plane of the opening. . Therefore, when the plate-shaped opening/closing member is rotated via the support member, the plate-shaped opening/closing member has a portion that receives the pressure of the fluid by rotating upstream of the fluid passing through the opening, and a portion that receives the pressure of the fluid by rotating upstream of the fluid passing through the opening. By rotating to the downstream side, a part is created that is biased by the pressure of the fluid.
As a result, the fluid pressure that the damper receives can be reduced compared to a switchgear in which the rotation shaft is provided at the end of the plate damper.

In addition, in the plate-shaped opening/closing member, since the rotation center of the support member is within the opening plane of the opening, a part of the plate-shaped opening/closing member will protrude from the opening when opening/closing the opening. By locating the center of rotation of the support member at a position separated from the plate-shaped opening/closing member by a predetermined distance, the amount of the plate-shaped opening/closing member protruding from the opening is reduced when compared with a so-called butterfly type damper.

[Example] Next, the opening/closing device of the present invention will be explained based on an example shown in the drawings.

Figure 1 shows a cross-sectional view of a ventilation duct showing an example in which the opening/closing device of the present invention is used to open and close the outlet of a vehicle air conditioner, and Figure 2 shows the vehicle air conditioner used in Figure 1. A schematic view of the device is shown, and FIG. 3 shows a perspective view of the inside of a ventilation duct including the switching device of the present invention.

As shown in FIG. 2, the air conditioner of this embodiment mixes cold air and warm air and discharges the mixed air to various parts of the vehicle interior.

Upstream of the ventilation duct 1, an inside air introduction port 2 for communicating with the vehicle interior and circulating the vehicle interior air (inside air) and an outside air introduction port 3 for taking in outside air are formed as air introduction ports. Both inlets 2, 3
Either one of them is closed by an inside/outside air switching damper 4.

Inside the ventilation duct 1, on the downstream side, there are a blower 5, a refrigerant evaporator 6 of the refrigeration cycle, a heater 7 that receives engine cooling water (hot water), an amount of air passing through the heater 7, and a bypass passage 8. An air mix damper 9 is provided as a temperature adjusting means for adjusting the ratio of the amount of air passing through the air.

The air whose temperature has been adjusted by the air mix damper 9 is supplied to a ventilation outlet 10 that blows air to the upper body of the vehicle occupant, a heater outlet 11 that blows air near the feet of the vehicle occupant, and a defroster to prevent fogging of the window glass. It is supplied to the air outlet 12.

The ventilation outlet 10 has a ventilation outlet 10 inside the ventilation duct 1.
A ventilation damper 13 that opens and closes is provided. This ventilation damper 13 is
One end (upper side in FIG. 1) is fixed to a rotating shaft 13a, and the ventilation outlet 10 is opened and closed by rotating the rotating shaft 13a by a diaphragm device (not shown). In addition, the ventilation damper 13 is provided on the air outlet 10 side of the ventilation damper 13 in order to keep the ventilation outlet 10 airtight when the ventilation damper 13 closes the ventilation outlet 10. A packing 14 made of urethane resin is attached.

The opening/closing device of the present invention is applied to open and close the heater outlet 11, and the heater damper 15 is arranged to be able to open and close the heater outlet 11. As shown in FIGS. 1 and 3, this heater damper 15 includes a plate-shaped opening/closing member 15a provided to be able to open and close the heater outlet 11, and both ends of this plate-shaped opening/closing member 15a (both left and right ends shown in solid line in FIG. 1). It has a T-shaped cross section and a plate-shaped support member 15b that supports the middle portion of the support member 15b. The heater damper 15 has a rotation shaft 15c rotatably supported by a case forming the ventilation duct 1 at one end of the support member 15b, and is rotated about the rotation shaft 15c. A drive plate 16 that rotates together with the rotation shaft 15c is attached to the rotation shaft 15c, and the heater damper 15 is operated by operating the drive plate 16 with a diaphragm device 17, which is the driving means of the present invention. Rotation axis 1
Rotates together with 5c.

The plate-shaped opening/closing member 15a includes a heater outlet 1 when the heater damper 15 closes the heater outlet 11.
1, a gasket 18 made of urethane resin is attached to the contact surface of the heater damper 15 with the opening of the air outlet 11.

Further, when the heater damper 15 closes the heater outlet 11, the front side (lower solid line in FIG. 1) and the back side of the plate-shaped opening/closing member 15a close the heater outlet 11.
1. Close the opening.

The opening/closing device of the present invention is applied to the defroster outlet 1, and a defroster damper 19 is arranged to open and close the defroster outlet 12. As shown in FIGS. 1 and 3, the defroster damper 19 includes a plate-shaped opening/closing member 19a provided to be able to open and close the defroster outlet 12, and this plate-shaped opening/closing member 19.
It consists of two supporting members 19b that respectively support between the both ends of a (the left and right ends of the solid line in FIG. 1). The defroster damper 19 has one end of the support member 19b.
It has a rotation shaft 19c rotatably supported by the case forming the ventilation duct 1, and is rotated about the rotation shaft 19c. Note that the rotation shaft 19c is provided at a position slightly shifted to the right (right side in FIG. 1) from the position where the plate-shaped opening/closing member 19a is supported by the support member 19b. As a result, when the defroster damper 19 opens when the defroster mode is set, one end of the plate-shaped opening/closing member 19a (lower side in FIG.
Stop at a position adjacent to 5c.

A drive plate 20 that rotates together with the rotation shaft 19c is attached to the rotation shaft 19c, and the defroster damper 19 is rotated by driving this drive plate 20 by a diaphragm device 21, which is the driving means of the present invention. It is rotated together with the moving shaft 19c.

The defroster damper 1 is attached to the plate-shaped opening/closing member 19a.
In order to keep the defroster outlet 12 airtight when the defroster damper 19 closes the defroster outlet 12, a packing 22 made of urethane resin is attached to the contact surface of the defroster damper 19 with the opening of the outlet 12.

Further, when the defroster damper 19 closes the defroster outlet 12, the opening of the defroster outlet 12 is closed by the front side (above the solid line in FIG. 1) and the back side of the plate-shaped opening/closing member 19a.

Ventilation damper 13, heater damper 1
5 and the defroster damper 19 are driven by operating a blow-off mode selection lever provided on an air conditioning control panel (not shown), and the blow-off ports (ventilation blow-off port 10, heater blow-out port 10, The outlet 11 and the defroster outlet 12) are opened and closed. In addition to each blowout mode (ventilation blowout mode, heater blowout mode, defroster blowout mode), the air conditioning control panel also includes a fan switch that starts the blower 5 and controls the air volume, and an inside/outside air switch that operates the inside/outside air switching damper 4. Air change lever, cooler switch,
An air mix damper drive lever is provided.

Next, the operation of the damper of this embodiment will be explained using FIGS. 1 to 3.

When the fan switch is turned on, the blower 5 sucks air from the inside air inlet 2 or the outside air inlet 3 depending on the setting position of the inside/outside air switching lever, and supplies the air into the ventilation duct 1. Air supplied into the ventilation duct 1 passes through a refrigerant evaporator 6. At this time, if the cooler switch is turned on, the air is cooled as it passes through the refrigerant evaporator 6. The air that has passed through the refrigerant evaporator 6 passes through the heater 7 or the bypass passage 8 at a rate that corresponds to the set position of the air mix damper 9, and then passes through each outlet (ventilation outlet 10, heater outlet 11). , is supplied to the defroster outlet 12). The supplied air is
The air is discharged from an outlet corresponding to the outlet mode selected by the vehicle occupant.

a When the ventilation mode is selected by operating the mode selection lever on the air conditioning control panel.

Heater damper 15 and defroster damper 19
However, the heater outlet 11 and the defroster outlet 1
2 and ventilation damper 13.
is driven, and the ventilation outlet 10 is opened.

b When the heater blow mode is selected by operating the air blow mode selection lever on the air conditioning control panel.

The ventilation damper 13 and the defroster damper 19 close the ventilation outlet 10 and the defroster outlet 12, respectively, and the driving plate 16 attached to the rotating shaft 15c of the heater damper 15 is driven by the diaphragm device 17. As the driving plate 16 rotates,
The heater damper 15 is rotated counterclockwise (in FIG. 1) about the rotation shaft 15c toward the inside of the heater outlet 11, and the heater outlet 11 is opened.

When the heater damper 15 rotates, the plate-shaped opening/closing member 15a of the heater damper 15 is supported at its intermediate portion by the support member 15b.
From the supporting position, the right side of the plate-shaped opening/closing member 15a in FIG. 1 receives the pressure of the air discharged from the heater outlet 11, and the left side thereof is energized by the discharged air. As a result, the pressure exerted by the air discharged from the heater outlet 11 can be reduced compared to a conventional plate-shaped damper that rotates with one end fixed to a rotation shaft.

Further, the rotation shaft 15c of the heater damper 15 is located upstream of the opening of the heater outlet 11 in the ventilation duct 1, and the plate-shaped opening/closing member 15a of the heater damper 15 is connected to the rotation shaft via the support member 15b. 15c.

Thereby, when the heater damper 15 opens the heater outlet 11, the plate-shaped opening/closing member 15a rotates while sliding inward with respect to the heater outlet 11. As a result, in the heater damper 15 to which the opening/closing device of the present invention is applied, when the heater damper 15 opens (the same applies when closing), the plate-shaped opening/closing member 15
Although the portion of a on the left side (left side in FIG. 1) of the position supported by the support member 15b protrudes outside the heater outlet 11, the amount of protrusion can be reduced compared to a butterfly type opening/closing device.

c When the defroster mode is selected by operating the air outlet mode selection lever on the air conditioning control panel.

The ventilation damper 13 and the heater damper 15 close the ventilation outlet 10 and the heater outlet 11, and the drive plate 20 attached to the rotation shaft 19c of the defroster damper 19 is driven by the diaphragm device 21. As the drive plate 20 rotates, the defroster damper 19 is rotated counterclockwise about the rotation shaft 19c to the inside of the defroster outlet 12, and the defroster outlet 12 is opened. At this time, the plate-shaped opening/closing member 19a of the defroster damper 19
Since the intermediate portions of both ends of the plate-shaped opening/closing member 19a are supported by the supporting members 19b, the defroster damper 19 is connected to the defroster outlet 1.
2, the left side of the plate-shaped opening/closing member 19a (left side in Figure 1) from its supporting position receives the pressure of the air discharged from the defroster outlet 12, and the right side receives the pressure of the air discharged from the defroster outlet 12. energized. As a result, the pressure exerted by the air discharged from the defroster outlet 12 can be reduced compared to a conventional plate damper that rotates with one end fixed to a rotation shaft.

Further, the rotation shaft 19c of the defroster damper 19 is connected to the defroster outlet 12 in the ventilation duct 1.
The plate-shaped opening/closing member 19a of the defroster damper 19 is located upstream from the opening of the support member 19.
It is supported by the rotating shaft 19c via b.

As a result, when the defroster damper 19 opens the defroster outlet 12, the plate-shaped opening/closing member 19a
rotates while sliding inward with respect to the defroster outlet 12. As a result, in the defroster damper 19 to which the opening/closing device of the present invention is applied, when the defroster damper 19 opens, the plate-shaped opening/closing member 19a
Although the portion on the right side (right side in FIG. 1) of the support member 19b protrudes outside the defroster outlet 12, the amount of protrusion can be reduced compared to a butterfly type opening/closing device.

In this embodiment, the opening/closing device of the present invention is used for the heater damper 15 and the defroster damper 19, but it is not necessary to use it only for the heater damper 15 and the defroster damper 19, and it can be used for other outlet dampers, suction dampers, etc. It may also be used as a mouth damper or an inside/outside air switching damper.

Since the opening/closing device of the present invention is applied to the outlet damper of a vehicle air conditioner, each damper 15, 19
Although the support members 15b and 19b constituting the support members 15b and 19b are arranged inside the ventilation duct 1, when the opening/closing device of the present invention is applied to an outside air intake, each support member 1
5b and 19b may be arranged outside the opening.
As a result, when each damper 15, 19 opens the opening, it is possible to reduce the amount by which a portion of the plate-shaped opening/closing members 15a, 19a protrudes into the inside of the opening.

Further, in the case of the heater damper 15, the supporting member and the plate-shaped opening/closing member constituting the damper are configured to have a T-shaped cross section, and in the case of the defroster damper 19, the supporting member 19b is attached to both ends of the plate-shaped opening/closing member 19a. Although the configuration is such that the intermediate portions are each supported, there is no need to be limited to these configurations, and the shape, positional relationship, etc. of the support member and the plate-shaped opening/closing member may be changed depending on the purpose and location of using the damper. You can.

Further, in the above embodiment, a diaphragm device is used as the drive means, but other drive means such as a manual operation means using a wire or the like or an electric motor may also be used.

Although each damper (ventilation damper 13, heater damper 15, defroster damper 19) was driven using a separate diaphragm device, three dampers (ventilation damper 1
3. Heater damper 15, defroster damper 19)
They may be connected by a link/cam mechanism and driven by one drive device (diaphragm device, servo motor, manual operation, etc.).

FIG. 4 shows a second embodiment of the present invention.

In the first embodiment, when the heater damper 15 and the defroster damper 19 close the heater outlet 11 and the defroster outlet 12, the plate-shaped opening/closing member 1
Although the case where the openings of each outlet (heater outlet 11, defroster outlet 12) are closed by the front side and back side of 5a, 19a is shown, in this embodiment, the opening 23 is closed and the damper 24 is closed. A case is shown in which the plate-shaped opening/closing member 25 is closed on the front side and the side side.

FIG. 5 shows a third embodiment of the present invention.

In this embodiment, a case is shown in which the opening 23 is closed only by the side surface of the plate-shaped opening/closing member 25 that constitutes the damper 24.

[Brief explanation of the drawing]

Figure 1 is a sectional view of a ventilation duct of a vehicle air conditioner, Figure 2 is a schematic diagram of a vehicle air conditioner, Figure 3 is a perspective view of the inside of the ventilation duct, and Figure 4 is a second implementation of the present invention. FIG. 5 is a cross-sectional view showing the state when the damper closes the opening; FIG. 5 is a cross-sectional view showing the third embodiment of the present invention and shows the state when the damper closes the opening; FIG. 7 and 7 are side views of a conventional switchgear. In the figure, 11...Heater outlet (opening), 12
... Defroster outlet (opening), 15 ... Heater damper, 15a, 19a ... Plate opening/closing member, 1
5b, 19b... Support member, 17, 21... Diaphragm device (drive device), 19... Defroster damper.

Claims (1)

[Claims for Utility Model Registration] A support member rotatably supported at one end, and an opening supported by the other end of the support member through which fluid passes as the support member rotates. A plate-shaped opening/closing member that opens and closes, and a drive unit that rotates the plate-shaped opening/closing member via the support member, and the support member is configured to rotate within the opening plane of the opening.
An opening/closing device characterized by having a rotation center at a position separated from the plate-shaped opening/closing member by a predetermined distance.