JPH0422086Y2 - - Google Patents

Description

[Detailed description of the invention] [Field of industrial application] This invention relates to a dehumidifying device with a diaphragm mechanism having a diaphragm, and in particular, a diaphragm that dehumidifies the inside of the diaphragm mechanism and prevents malfunction of the diaphragm due to freezing of water. The present invention relates to a dehumidifying device having a diaphragm mechanism.

[Conventional technology] Vehicles are equipped with four-wheel drive (four-wheel drive), which transmits driving force to all four wheels.
4WD) structure. This four-wheel drive structure is provided with an actuator as a diaphragm mechanism that switches between two-wheel drive and four-wheel drive using a pressure difference between negative pressure and atmospheric pressure. The actuator is partitioned into a first chamber and a second chamber by a diaphragm, and a switching cable 48 is connected to this diaphragm.

The four-wheel drive vehicle utilizes only one-axle two-wheel drive (2WD) during normal driving, and transmits driving force to the two-axle four wheels when traveling over rough roads, uneven terrain, etc.

[Problems to be solved by the invention] By the way, in the conventional diaphragm mechanism, atmospheric air is introduced into the diaphragm mechanism and negative pressure acts on it, causing moisture in the atmosphere or intake air to liquefy, causing the diaphragm mechanism to liquefy. Moisture accumulates inside. The engine is designed to remove this moisture by natural drying using the diaphragm mechanism's ambient temperature or engine room temperature.

However, the atmospheric temperature is relatively low, and there is a problem that natural drying is not performed sufficiently.

As a result, the moisture freezes in cold weather, causing malfunction of the diaphragm mechanism, resulting in the inconvenience that the switching operation cannot be performed reliably.

[Purpose of the invention] Therefore, in order to eliminate the above-mentioned disadvantages, the purpose of this invention is to prevent malfunction of the diaphragm due to moisture freezing by providing a disc-shaped moisture absorbing material on the inner wall of the diaphragm mechanism concentrically with the diaphragm. The object of the present invention is to realize a dehumidifying device having a diaphragm mechanism, which has a diaphragm that can prevent the occurrence of rust and improve durability.

[Means for solving the problem] In order to achieve this object, this invention provides a diaphragm mechanism in which a chamber is partitioned and formed by a diaphragm, and the diaphragm is actuated by fluid energy to expand and contract the chamber. The diaphragm mechanism is characterized in that a disc-shaped moisture absorbing material is fixed to the inner wall of the diaphragm mechanism concentrically with the diaphragm.

[Function] With the above-described configuration, the moisture that has entered the chamber of the diaphragm mechanism is absorbed by the moisture absorption material, and the moisture in the moisture absorption material is released depending on conditions such as a rise in outside temperature or when the engine is warmed up. and performs effective dehumidification.

[Example] Hereinafter, an example of this invention will be described in detail based on the drawings.

Figures 1 and 2 show an embodiment of this invention. In FIG. 1, 2 is a diaphragm mechanism for four-wheel drive control, for example, an actuator, 4 is a diaphragm, 6 is a first chamber, 8 is a second chamber, 10 is a first pipe for pressure intake, and 12 is a second pipe. . The actuator 2 is configured to operate the diaphragm 4 using fluid energy, such as a pressure difference between negative pressure and atmospheric pressure, to expand and contract the first and second chambers 6 and 8, respectively.

A retainer 14 is provided on the diaphragm 4, and a cable 16 for switching between four-wheel drive and two-wheel drive is connected.

In the first and second chambers 6 and 8 of the actuator 2, moisture absorbing materials 18 and 18 made of silica gel, for example, are provided as dehumidifying devices, respectively. That is, on the inner walls 2a, 2a of the actuator 2, an annular, disc-shaped moisture absorbing material 18 is provided concentrically with the diaphragm 4.
18 is fixed.

Next, the effect will be explained.

When the engine is driven, the atmosphere is introduced into the actuator 2 through the first and second pipes 10 and 12, and negative pressure is applied, allowing moisture in the atmosphere or intake air to enter. At this time, the moisture that has entered is absorbed by the moisture absorbing material 18, and the insides of the first and second chambers 6 and 8 of the actuator 2 are dehumidified.

In addition, the moisture absorbing material 18 releases moisture in response to conditions such as an increase in outside temperature or when the engine is warmed up, thereby restoring the moisture absorption function of the moisture absorbing material.

As a result, the moisture absorbing material can effectively absorb and release moisture, and the dehumidification state within the actuator is improved, thereby preventing malfunctions due to freezing.

Furthermore, by dehumidifying the inside of the actuator, rust can be prevented as much as possible and durability can be improved.

Furthermore, the structure of the dehumidifier can be extremely simplified and the cost can be reduced.

Furthermore, by dehumidifying only the first and second chambers of the diaphragm using the moisture absorbing material, it is not necessary to dehumidify the entire system, and the moisture absorbing material can be made compact.

In addition, by fixing the disk-shaped moisture absorbent material on the inner wall of the diaphragm mechanism concentrically with the diaphragm, there is no risk that the moisture absorbent material will interfere with the operation of the diaphragm, and there is no need to increase the size of the diaphragm mechanism. It can be formed efficiently.

[Effects of the invention] As explained in detail above, according to this invention, since the disk-shaped moisture absorbing material is fixed on the inner wall of the diaphragm mechanism concentrically with the diaphragm, the moisture inside the diaphragm mechanism is effectively dehumidified. It is possible to prevent malfunction of the diaphragm due to moisture freezing, and also to prevent rust from forming, thereby improving durability. Furthermore, the structure of the dehumidifier can be extremely simplified, making manufacturing easier and reducing costs.

[Brief explanation of the drawing]

1 and 2 show an embodiment of this invention, with FIG. 1 being a schematic sectional view of a diaphragm mechanism, such as an actuator, and FIG. 2 being a schematic sectional view taken along the line - in FIG. In the figure, 2 is an actuator, 4 is a diaphragm, 6 is a first chamber, 8 is a second chamber, 10 is a first pipe, 12 is a second pipe, and 18 is a moisture absorbent material.

Claims (1)

[Scope of utility model registration request] In a diaphragm mechanism that divides and forms a chamber by a diaphragm and expands and contracts the chamber by operating the diaphragm with fluid energy, a disk-shaped moisture absorbing material is fixed on the inner wall of the diaphragm mechanism concentrically with the diaphragm. A diaphragm mechanism dehumidifier having a diaphragm characterized by the following.