JPH06117554A - Flow passage changeover device - Google Patents

Abstract

PURPOSE:To make the constitution of a multi-flow passage changeover device to be used for the change switchover or the like of heat operation fluid routes accompanying the cooling/heating operation changeover of a suction freezer type air conditioner, simple and inexpensive and free from leakage between flow passages. CONSTITUTION:Respective flow passages 51-58 to be connected in changeover to the changed-over planes 2 of the valve chambers 3 of a box body 1 are arranged at intervals, and respective changeover grooves 21-24 are arranged on changeover planes 11 that butt against the changed-over planes 2 and slide. Elastic members 34-37 for push-pressing the changeover planes 11 against the changed-over planes 2 are arranged in a valve chamber. Even in a case in which slide places between the valve chambers 3 and a valve body 10 have been worn, leakage between respective flow passages does not occur as the changeover planes 11 of the valve body 10 are push-pressed against the changed- over planes 2 by means of the elastic members such as the springs 34-37.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a multi-channel switching device for switching and connecting a plurality of fluid paths (referred to as channels in the present invention).

[0002]

2. Description of the Related Art Devices of this type include a rotary valve type and a reciprocating valve type, and the rotary valve type is also called a cock type. For example, as shown in FIG. A plurality of flow paths 5 arranged at intervals along the circumference of the inner surface
1 to 58 are provided, and a plurality of through holes 6 having different directions are formed in the valve body 60 which is fitted into the inner surface of the fixed side 50 and rotates.
1, 62, bent holes 63, 64, etc. are provided, and the through holes 61, 62 and the bent holes 63 for the flow paths 51 to 58 are provided.
It is known that the valve body 60 is rotated so as to change the facing relationship with 64, and the connection of each flow path is switched.

The reciprocating valve type is also called a slide type,
For example, as shown in FIG. 7, a plurality of flow paths 71 to 7 arranged at intervals along the wall portion of the fixed side 70 formed of a cylindrical box body.
8 is provided, and a narrow groove 81, an oblique through hole 82, a wide groove 83, etc. are provided in the piston-shaped valve body 80 that slides in the fixed side 70, and the narrow groove 81 for each of the flow paths 71 to 78 is provided. It is well known that the valve body 70 is moved so as to change the facing relationship between the diagonal through hole 82 and the wide groove 83, and the connection of each flow path is switched, and such switching of each flow path is switched in a sequence. It is also called a sequence valve with a configuration.

Such a multi-passage switching device is used for switching the flow passage of the heat-operated fluid required at the time of switching between the heating / cooling operation and the cooling operation in the heating / cooling device. For example, as shown in FIG. The heated side 101 of the heating heat exchanger 101 that performs a heat exchange operation by the absorption refrigerator 100.
Flow paths 51 and 52 for circulating the heat-operated fluid 101a passing through A by the pump 102, and the cooled side 1 of the cooling heat exchanger 103.
Passages 53 and 54 for circulating the heat-operated fluid 103a passing through 03A by the pump 104 to passages 55 and 56 for radiating the outdoor heat exchanger 105 for heat radiation, and the heat exchanger 1 for indoor cooling and heating
A rotary valve type multi-channel switching device 200 as shown in FIG. 6 is used as the channel switching device 200 for switching the connection with the channels 57 and 58 for passage through the connection route 06 to the connection route shown by the solid line and the connection route shown by the dotted line. Is provided, and each flow path is switched between a flow path shown by a solid line and a flow path shown by a dotted line. In this case, since the flow paths in eight directions are switched, it is commonly called a eight-way valve.

[0005]

When such a multi-channel switching device 200 is constituted by a rotary valve type as shown in FIG. 6, a sliding contact surface between the fixed side 50 and the valve body 60 is formed. In order to eliminate the gap between the passages and eliminate the leakage between the flow paths, the sliding contact surface should be formed with a tapered surface as in the case of the general cock type. Since the biting action by the taper works, a large force is required to rotate the valve element 60, and the disadvantage that the electric actuator for rotation becomes large and the size of the entire device increases, and the flow paths 51 to 51 of the fixed side 50 Since 58 is radial, it cannot be machined by one-sided machining, and the through hole 61 in the valve body 60
There is an inconvenience that it takes complicated time to form the stepped passage portions of 62 and the bent portions of the bent holes 63 and 64.

Therefore, it may be considered that the reciprocating valve type as shown in FIG. 7 is used, but in the reciprocating valve type, each flow path is caused by the abrasion of the sliding contact portion between the fixed side 70 and the valve body 80. However, if a ring-shaped packing is provided in a certain place to prevent this leakage, the ring-shaped packing is apt to be caught in each flow path and easily damaged. It causes inconvenience such as causing a breakdown accident.

Therefore, there is a problem that it is desired to provide a multi-channel switching device that does not have such inconvenience.

[0008]

According to the present invention, a plurality of flow passages are provided on the fixed side as described above, a plurality of switching grooves for switching the flow passages are provided in the valve body, and the flow passage and the switching In the flow path switching device configured to change the connection between the flow paths by moving the relative position to the groove, in the inside of the box, one plane as the switched plane, while forming the valve chamber, A valve chamber forming means for forming the flow paths on the switched plane by arranging the flow paths at intervals, and a plane for contacting and sliding the valve body against the switched plane (referred to as a plane that abuts and slides in the present invention). A valve body forming means which is formed as a switching plane so as to be movable in the valve chamber, and in which switching grooves are arranged on the switching plane, and a member having elasticity for pressing the switching plane to the switched plane. And a pressing member arranging means for arranging As a first device having a configuration and a second device, instead of the pressing member arranging means in the first device, a magnetic or electromagnetic attraction mechanism for pressing the switching plane to the switched plane, or An object of the present invention is to solve the above-mentioned problems by providing a device having a structure for providing a magnetic means for disposing a repulsion mechanism between a box body and a valve body.

[0009]

In the first device, even when the sliding portion between the valve chamber and the valve body is worn, the switching plane of the valve body is pressed against the switched plane of the valve chamber by the elastic member such as the spring. For,
It acts to prevent leakage from occurring between the flow paths. Further, in the second device, since the same pressure is applied by the attraction or repulsion by the magnet or the electromagnet, it acts to prevent the leakage between the flow paths.

[0010]

EXAMPLES Examples will be described below with reference to FIGS.
In these figures, the portions denoted by the same reference numerals as those in FIGS. 6 and 7 are the portions having the same functions as those described with reference to FIGS. 6 and 7.

[First Embodiment] The first embodiment of FIG. 1 is an embodiment corresponding to the above-mentioned first device, in which a plurality of flow paths 51 to 58 are provided on the fixed side to allow flow to the valve body 10. A plurality of switching grooves 21 to 24 for switching the passages are provided, and each flow passage 51 is moved by moving the valve body 10 so as to shift the relative positions of the flow passages 51 to 58 and the switching grooves 21 to 24. ~ 5
In the flow path switching device configured to change the connection of 8,
A valve chamber 3 is formed with one plane inside the box 1 as a switched plane 2 and each flow path 5 is formed in the switched plane 2.
A switching chamber 11 is formed by a valve chamber forming means formed by arranging 1 to 58 at intervals and a plane of a valve element that abuts and slides on the switched plane 2.
The valve body forming means for forming the switching grooves 21 to 24 on the switching plane 11 and the elastic member for pressing the switching plane 11 against the switched plane 2, for example, the spring 3.
5 to 37 and the like are provided in the valve chamber 3 and a pressing member arranging means is provided, and each component will be specifically described below.

In FIG. 1, a box body 1 is a closed box which has a valve chamber 3 having one plane as a plane to be switched 2 inside, and is formed to keep airtightness. It is made of a good material, that is, a material of a poor heat conductor, for example, a hard resin material, and the portion of the switched plane 2 is made of a metal material having poor heat conductivity, for example, stainless steel or cast iron. In addition, the entire box 1 is made of a hard resin material with good heat insulation,
It may be formed of stainless steel or cast iron.

At the location of the plane 2 to be switched, the flow paths 51 to 5 are formed.
8 are arranged with a required arrangement and a required space, and each of the flow paths 51 to 58 is provided with a structure (not shown) in which piping for extending the flow path is possible.

The bearing portion 4 is a bearing body having a structure in which the moving rod 31 for moving the valve body 10 can move while maintaining airtightness.
For example, an oilless bearing made of a resin material provided with a seal packing (not shown).

The moving rod 31 is formed of a material having a good heat insulating property or a material having a poor heat conduction, for example, a round rod made of a hard resin material, and a connecting portion 32 with the valve body 10 is arranged in a vertical direction in the drawing. The movable structure (not shown) is formed into a structure such as a dovetail structure or a universal joint.

In the valve body 10, a plane that abuts and slides on the plane 2 to be switched is used as a plane 11, and on the side of the plane 11, switching grooves 21 to 24 for performing a desired flow path switching are provided. It is provided by arranging according to the required shape and interval, and when it is used as the flow path switching connection of the cooling and heating apparatus of FIG.
1 to 58 are provided with grooves having a shape as shown in [A-A cross section] of FIG. 1 and formed of, for example, stainless steel or cast iron having poor heat conductivity, or easy to form. It is formed of a copper alloy material or a hard resin material having a good heat insulating property. Here, when the box body 1 and the valve body 10 are formed of a metal material such as stainless steel or cast iron, the switching groove 21
The surfaces of the contact surfaces 24 to 24 and the switching plane 11 are covered with a hard resin material having a good heat insulating property.

On the rear side of the valve body 10 in the valve chamber 3, there is a sliding plate 3
By providing the springs 34 to 37 through 3, the elastic member for pressing the switching plane 11 against the switched plane 2 is provided.

The sliding plate 33 is formed of a plate having a small frictional resistance, for example, a plate formed by coating a fluorine resin on a metal plate, and the springs 35 to 37 are formed of, for example, spiral springs, and are arranged at positions. The positioning of is held by the holes formed in the box 1.

When the moving rod 31 is moved to the left or right, it can be switched between the solid line and the dotted line shown in FIG. 1 [flow path switching configuration], and can serve as the multi-flow path switching device 200 of FIG. You can

[Second Embodiment] A second embodiment of FIG. 2 is a first embodiment corresponding to the above-mentioned second apparatus, and in FIG. 2, parts indicated by the same reference numerals as those of FIG. Is a part having the same function as that described with reference to FIG. Also,
In the second embodiment, the switching plane 11 is replaced with the switched plane 2 in place of the pressing member disposing means in the first embodiment.
It has a structure having a magnetic pressing means provided with an attracting mechanism composed of the electromagnet 39 and the magnetic conducting plate 40 for pressing to each other, and each component will be specifically described below.

In FIG. 2, the difference from FIG. 1 is that the sliding plate 33 and the springs 34 to 37 are not provided, and the switched plane 2 of the box 1 is changed.
An electromagnet 39 is embedded under the valve body 10, and a non-magnetizable magnetic material, that is, a soft magnetic material, for example, a soft iron material, is embedded in the lower edge of the valve body 10 to form an attraction mechanism by attraction of magnetic force. The magnetic core 39A of the electromagnet 39, the exciting coil 39B, and the magnetic plate 40 are in a positional relationship as shown in [BB cross section]. The electromagnet 39 has an exciting wire (not shown). No) gives the required current.

Since the magnetic poles of the electromagnet 39 are formed in an elongated rectangular shape elongated along the longitudinal direction of the valve body 10 in [A-A cross section] in FIG. 1, that is, the moving direction of the valve body 10, The magnetic resistance is small with respect to the movement of the body 10.

[Third Embodiment] The embodiment of FIG. 3 is a second embodiment corresponding to the above-mentioned second device, and is shown in FIG. 3 by the same reference numerals as those of FIGS. 1 and 2. Figure 1
A part having the same function as the function described with reference to FIG. Further, in the third embodiment, a repulsion mechanism including a magnet 41A and a magnet 41B for pressing the switching plane 11 against the switching plane 2 is provided in place of the portion of the pressing member disposing means in the second embodiment. It has a configuration having a magnetic pressing means, and each component will be specifically described below.

In FIG. 3, a part different from FIG. 2 is that there is no attraction mechanism by the electromagnet 39 and the magnetic conducting plate 40, and the valve body 10
A magnet 41A is embedded in the back side of the valve body 10, and a magnet 41B is embedded in a location facing the magnet 41A on the inner surface side of the valve chamber 3 facing the back side of the valve body 10.
1B is, for example, a permanent magnet such as a ferrite magnet, and the polarities of the magnetic forces are arranged so that the same polarities face each other.

Therefore, the magnetic force of the magnet 41A and the magnet 41
Due to the repulsive configuration in which the magnetic force of B repels, the switching plane 11
Is pressed against the switched plane 2, so that the magnetic resistance is small in the moving direction of the valve body 10.

[Fourth Embodiment] The embodiment shown in FIG. 4 is a second embodiment corresponding to the above-mentioned first apparatus. In FIG. 4, the parts designated by the same reference numerals as those in FIG. This is a part having the same function as that described with reference to FIG. Further, in the fourth embodiment, in order to reduce the length in the moving direction of the valve body 10 in the valve chamber 3 of the first embodiment, the valve body 10 is reduced.
The flow path 55 of the portion located in the center of the flow path 54,
The path for switching and connecting the flow path 56 to the flow path 53 uses a gap portion 3A on the back side of the valve body 10 in the valve chamber 3 and gap portions 3B and 3C before and after the moving direction of the valve body 10. The configuration is such that it can be switched so that it can be switched between the solid line and the dotted line shown in [Flow passage switching configuration] of FIG.

Specifically, the flow paths 51 to 58 of the valve body 10
And the center 21A and the switching grooves 22 to 24 are
-C cross section], and at the switching position in the figure,
The flow passage 55 positioned in the central hole 21A is connected to the flow passage 54 through the route of the gap 3A → the hole 33A of the sliding plate 33 → the gap 3B, and the valve body 10 is moved to the flow passage 5 in the central hole 21A.
When 6 is positioned, the flow path 56 is connected to the flow path 53 through the path of the gap 3A → the hole 33B of the sliding plate 33 → the gap 3C.

[Modified Implementation] The present invention can be modified and implemented as follows.

(1) The flow path switching structure of the fourth embodiment of FIG. 4 is applied to the structure of the second embodiment of FIG. 2 or the third embodiment of FIG.

(2) The box body 1 and the valve body 10 are formed into a desired shape by adhering a plate material and a pipe material.

(3) Both or one of the box body 1 and the valve body 10 is formed of a metal material or a solid hard resin material, and a heat insulating coating such as a rubber lining or Teflon coating is applied to the surface of the main part. And form it.

(4) The top surface side or bottom surface side of the box body 1 or both of them in the figure are formed separately from the rest, and a pankin is sandwiched between the separated portions and screwed. Etc. are integrated into one.

(5) In the configuration of the second embodiment of FIG.
Without providing the magnetic conducting plate 40, the entire valve body 10 is made of a non-magnetizable magnetic material.

(6) In the configuration of the second embodiment shown in FIG.
A magnetic conducting plate is provided instead of the electromagnet 39, and the magnetic conducting plate 4
Instead of 0, a magnet, for example, a permanent magnet such as a ferrite magnet is provided, or the entire valve body 10 is configured by a similar permanent magnet. Alternatively, instead of the magnetic conducting plate 40, a magnet, for example, a permanent magnet such as a ferrite magnet is provided, and the electromagnet 39 is moved when the valve body 10 is moved, that is, when switching.
To the valve body 1 by applying an electric current of a polarity repulsive to the permanent magnet
Make it easy to move 0.

(7) In the configuration of the third embodiment shown in FIG.
Instead of the magnet 41B, the entire valve body 10 is configured as a permanent magnet as in (10) above.

(8) In the first embodiment of FIG. 1 and the fourth embodiment of FIG. 4, in place of the springs 34 to 37, a soft and elastic foam-containing resin material such as polyethylene foam or urethane foam is used. The elastic member is formed by sandwiching the members having the required thickness.

(9) Multi-channel switching device 200 in FIG.
5, when the multi-channel switching device 200A / 200B having the two four-way valve configuration is used, the channels 51 to 58 in each of the above-described embodiments are arranged in a plurality of rows.
For example, it is divided into two rows and arranged on the plane 2 to be switched, and corresponding to the plural rows, the switching grooves 21 to 21 of the valve body 10 are arranged.
24 is also arranged in a plurality of rows.

[0038]

According to the present invention, in the structure according to the first and fourth embodiments, the sliding position between the valve chamber 3 and the valve body 10, that is, the switching plane 11 and the switched plane 2 Even if the valve is worn, since the switching plane 11 is pressed against the switching plane 2 by the elastic member such as the springs 34 to 37, the valve body 10 moves without leaking between the flow paths. Resistance to the direction can be reduced.

Further, in the structures according to the second and third embodiments, the switching plane 11 is pressed by the attraction or repulsion attraction or repulsion by the magnets or electromagnets. Since it is pressed against 2, the valve body 10 does not leak between the flow paths.
There is a feature that it is possible to provide a multi-channel switching device that can reduce the resistance force in the moving direction.

[Brief description of drawings]

FIG. 1 is a structural sectional view and a flow path switching structural diagram of a first embodiment of the present invention.

FIG. 2 is a structural sectional view and a flow path switching structural diagram of a second embodiment of the present invention.

FIG. 3 is a structural sectional view and a flow path switching structural diagram of a third embodiment of the present invention.

FIG. 4 is a structural sectional view and a flow path switching structural diagram of a fourth embodiment of the present invention.

FIG. 5 is a flow path switching configuration diagram of a modified embodiment of the present invention.

FIG. 6 is a sectional view showing the configuration of the prior art of the present invention.

FIG. 7 is a sectional view showing the structure of the prior art of the present invention.

FIG. 8 is a flow path switching configuration diagram of the prior art of the present invention.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Box body 2 Switched plane 3 Valve chamber 3A Gap part 3B Gap part 3C Gap part 4 Bearing part 10 Valve body 11 Switching planes 21-24 Switching groove 21A Central hole 31 Moving rod 32 Connecting part 33 Sliding plate 33A hole 34 -37 Spring 39 Electromagnet 39A Magnetic core 39B Excitation coil 40 Magnetic guide plate 41A Magnet 41B Magnet 50 Fixed side 51-58 Flow path 60 Valve body 61/62 Through hole 63/64 Bent hole 70 Fixed side 71-78 Flow path 80 Valve body 81 Narrow Groove 82 Oblique Through Hole 83 Wide Groove 100 Absorption Refrigerator 101 Heating Heat Exchanger 101A Heated Side 101a Heat Operating Fluid 102 Pump 103 Cooling Heat Exchanger 103A Cooling Side 103a Heat Operating Fluid 104 Pump 105 Heat Dissipation Outdoor heat exchanger 106 indoor cooling and heating heat exchanger 200 multi-path switching device

Claims (2)

[Claims] 1. A plurality of flow paths are provided on a fixed side, a plurality of switching grooves for switching the flow paths are provided in a valve body, and the relative positions of the flow paths and the switching grooves are moved. Is a flow path switching device in which the connection between the flow paths is changed by: A valve chamber forming means that forms the flow passages at intervals, and the valve body is formed so as to be movable in the valve chamber with a plane that abuts and slides on the switched plane as a switching plane. Valve body forming means formed by arranging each of the switching grooves on the switching plane, and pressing member arranging means for arranging an elastic member for pressing the switching plane against the switched plane in the valve chamber. A flow path switching device comprising: 2. A plurality of flow paths are provided on the fixed side, a plurality of switching grooves for switching the flow paths are provided in the valve body, and the relative positions of the flow paths and the switching grooves are moved. Is a flow path switching device in which the connection between the flow paths is changed by: A valve chamber forming means that forms the flow passages at intervals, and the valve body is formed so as to be movable in the valve chamber with a plane that abuts and slides on the switched plane as a switching plane. The valve body forming means for arranging and forming each of the switching grooves on the switching plane, and the magnetic or electromagnetic attraction mechanism or repulsion mechanism for pressing the switching plane against the switched plane, the box body and the valve. Magnetic means for positioning on the body And a flow path switching device.