JPH0237005Y2 - - Google Patents

Description

[Detailed Description of the Invention] "Industrial Application Field" The present invention relates to an electrically operated composite solenoid valve in an automobile air conditioner.

``Prior Art'' As shown in Figures 7 to 9, conventional solenoid valves require independent functions when used in combination with a large number of single-type valves. yoke 1 and plate 2 are required individually, and in addition, the first yoke 1 and plate 2 provided in the main body 3 for negative pressure
A piping component having a hole 4 and a second hole 5 is required, and since the holes 4 and 5 each have a uniform directionality, when a large number of them are used in combination, there is a limitation in the installation space. The piping is complicated, and the number of parts increases, which increases production man-hours, resulting in higher product costs.Also, the mounting position is limited due to the shape of each item, making it difficult to install in narrow bonnets. There were drawbacks such as the piping method becoming separated in some cases.

``Problems that the invention attempts to solve'' In order to standardize the yokes and plates of multiple solenoid valves, some have a single yoke, but
When adjacent solenoid valves are operated simultaneously, a magnetic field is generated in each of the yokes, but the mutual magnetic fields influence each other and reduce the magnetic force, resulting in a reduction in the attractive force. In view of these conventional drawbacks, the present invention reduces the number of parts by standardizing the yokes and plates.
The purpose is to prevent the mutual magnetic fields generated by operating the respective electromagnetic valves in this yoke from influencing each other.

``Means for solving the problem'' The structure of the present invention is that a movable valve body is made up and down by a spring springing from below in a valve chamber with a coil wound around the outer periphery and a fixed iron core below. A plurality of housed solenoid valves are mounted at regular intervals on a plate made of magnetic material, and a plurality of solenoid valves are mounted at regular intervals on the outside of each solenoid valve to form a magnetic circuit. form a slit,
A negative pressure piping section is installed on the top surface of this yoke, which consists of a top plate each having a negative pressure tap, a seal packing provided with first and second air passages, and a base plate communicating the valve chamber and the air passage. It is characterized by the fact that

"Function" Since slits are provided in the common yoke constituting the magnetic circuit at the boundaries between the solenoid valves, it is possible to minimize the influence of each other's magnetic fields when adjacent solenoid valves are used simultaneously.

``Embodiment'' An embodiment of the present invention will be explained based on FIGS. 1 to 3. In FIG. 2, fixed iron cores 12 are established at regular intervals on a plate 11 made of magnetic material, and the lower end is Caulk and secure. Each fixed core is provided with a through hole 13 for negative pressure conduction through the center thereof, a first valve seat 14 is provided at the upper end of this through hole, and an opening 15 is formed at the lower end. A cylindrical core 17 having a coil 16 wound around the outside thereof is inserted and fixed to the outer periphery of each fixed iron core, and a valve chamber 18 is formed within this core. A movable valve body 20 having a valve part 19 made of a flexible material at the center of both upper and lower ends is accommodated in the valve chamber 18 so as to be movable up and down, and a locking step provided on the intermediate outer periphery of the movable core 20 The solenoid valve A is formed by forming a lower diameter from 21 to a small diameter, and springing a spring 22 between the upper surface of the fixed iron core and this locking step portion 21. 25 is plate 11
The lower end of each cylindrical core 17 is hooked to a mounting plate located below the plate 11, and a filter 26 is mounted between the plate 11 and the mounting plate 25.

27 is a yoke made of magnetic material, and slits 28 are provided on the top surface 27a and side surface 27b at the middle between the solenoid valves, that is, at each boundary between adjacent solenoid valves.
a and 28b are formed respectively. The first slits 28a are formed in an L-shape continuously on the top surface and the side surface 28b, and a second slit 28b is formed linearly in the center of the top surface 27a in a direction perpendicular to the slits. Openings 29, 29 are provided on the upper surface of the yoke 27 to allow the upper portion of the cylindrical core 17 to protrude.
are formed respectively.

30 is a base plate attached to the yoke upper surface 27a, which closes the upper part of the valve chamber 18;
In addition, holes 31 are provided on the same straight line as the through hole 13, respectively.
are provided through the holes, and a second valve seat 32 is formed at the lower end of each hole. Also, this base plate 30 has the hole 3.
A small hole 35 is formed in each pair with the cylindrical core 1, and the small hole 35 communicates with a groove 36 provided vertically in the inner wall surface of the cylindrical core 17.

40 is the main tap 4 for negative pressure piping on the front.
1. First tap 42a, second tap 42b, third tap
Tap 42c, fourth tap 42d, fifth tap 4
2e, a top plate in which a sixth tap 42f is formed, and a first air supply passage 45 communicating the small holes 31, 31 in the cavity 44 formed between the top plate 40 and the base plate 30; A seal packing 48 forming a second air supply passage 46 communicating the holes 35, 35 is housed therein, and the seal packing 48, the top plate 40, and the base plate 30 form a negative pressure common portion 50. In this case, the negative pressure circuit can be easily changed by simply replacing the seal packing 48 with one having a different air supply path, and this negative pressure common section 50 can be connected to the yoke upper surface 2.
7a, and tighten the upper surface 27a with the bolt 52.
stick to the top.

Next, the operation of this embodiment will be described. An external power source is connected to the coil 16 of each electromagnetic valve, and each electromagnetic valve is operated to switch the negative pressure circuit. When a current from a power supply is applied to the coil 16 to excite it and generate a magnetic force in the fixed iron core 12, the movable valve body 20 is attracted downward against the elastic force of the spring 22, and the first valve seat 14 is pulled downward. The valve is closed at part 19, and the second valve seat 32 is opened. Therefore, the first air passage 4
5 and the second air supply path 46 communicate with each other via the valve chamber 18.

In this case, the movable valve body 20
By closing the valve seat 32, the air supply paths 45, 46
Negative pressure can be conducted, and the desired air supply path between the main tap 41 connected to a negative pressure source (not shown) and the first to sixth taps is connected (FIG. 2).

When the coil 17 is de-energized, the movable valve body 2
0 is separated from the fixed iron core 12 by the elastic force of the spring 22, opening the first valve seat 14 and closing the second valve seat 32. Therefore, the second air supply path 46 passes through the groove 36, passes through the open first valve seat 14 and the through hole 13, communicates with the opening 15, and is connected to the outside air via the filter 26. Therefore, the outside air enters a desired tap among the first to sixth taps via the second air supply path 46. Incidentally, since the seal packing 48 is formed with a pattern of conductive passages consisting of the first and second air supply passages 45 and 46, the negative pressure circuit can be easily changed by changing this pattern.

``Effect of the invention'' The magnetic circuit generated in the yoke due to the magnetic force generated in the coils of adjacent solenoid valves is created by providing slits as magnetic resistance at each boundary of each solenoid valve.
The influence of the adjacent solenoid valve on the magnetic field can be reduced.

By preventing the influence of mutual magnetic fields, a decrease in the attractive force can be prevented, so even if the yoke is shared, there is no need to increase the size of the coil to increase the attractive force.

The negative pressure circuit provided in the negative pressure common section is patterned on the sheet packing, and there is no need to connect the negative pressure pipes each time, which eliminates the complexity of piping, and simply replaces the sheet packing. Negative pressure circuit can be easily changed.

By sharing the negative pressure circuit and the magnetic circuit, it is possible to reduce the size and number of parts, and it is possible to further reduce the weight, making it ideal for in-vehicle use.

Just by changing the size of the plate and yoke,
Composite types with more solenoid valves can be easily assembled.

Since parts can be standardized and unified, assembly becomes easier and work efficiency is further improved.

[Brief explanation of the drawing]

The drawings show an embodiment of the present invention; Fig. 1 is an overall plan view, Fig. 2 is a vertical sectional view of main parts, and Fig. 3 is a longitudinal sectional view of the main part.
The figure is a sectional view showing the operating state, Figure 4 is a plan view with the negative pressure common part removed, Figure 5 is a side view of the same, and Figure 6 is a side view of the same.
The figures are a sectional view taken along the line B--B in FIG. 4, FIG. 7 is a plan view of a conventional valve, FIG. 8 is a side view, and FIG. 9 is an enlarged sectional view of one solenoid valve. 11...Plate, 12...Fixed iron core, 16...
... Coil, 18 ... Valve chamber, 20 ... Movable valve body, 2
2...Spring, 27...Yoke, 28a, 28b...
...Slit, 50... Negative pressure common part, A... Solenoid valve.

Claims (1)

[Scope of utility model registration request] A plurality of electromagnetic valves are mounted on a plate made of magnetic material, and a movable valve body is housed in a valve chamber with a coil wound around the outer periphery and a fixed iron core below, and a movable valve body that is spring-loaded from below can be moved up and down. Install at regular intervals,
A slit is formed on the top and side surfaces of the yoke that is attached to the outside of each solenoid valve to form a magnetic circuit, and a slit is formed at each boundary between each solenoid valve, and a top plate with a negative pressure tap is formed on the top surface of this yoke. A composite electromagnetic valve equipped with a negative pressure piping section consisting of a seal packing provided with first and second air supply passages, and a base plate that communicates the valve chamber and the air supply passage.