JP4500274B2 - Bidirectional solenoid valve and bidirectional solenoid valve block having the same - Google Patents

Description

The present invention is a pilot to generate a differential pressure above and below the main valve body by the operation of the solenoid valve bidirectional solenoid valve configuration capable of closing the two-way flow by the main valve body is opened and closed controlled, and which The present invention relates to a bidirectional solenoid valve block using the

  As a conventional bidirectional solenoid valve, two direct acting solenoid valves that can close the flow of fluid in one direction are connected so that the directions in which the fluid can be sealed are opposite to each other, thereby closing the bidirectional flow. (For example, see Patent Documents 1 and 2).

JP 2000-227173 A JP 2002-195699 A

  By the way, such a direct acting bidirectional solenoid valve has a mechanism for opening and closing the flow path by driving the plunger by the exciting coil and sliding the valve body directly. Therefore, when a large flow rate is controlled, the cross-sectional area of the flow path to be closed also increases, but the pressure receiving area of the valve body increases accordingly, and a large driving force is required for the excitation coil that drives the valve body. In order to generate such a large driving force, it is necessary to increase the attractive force by increasing the number of windings of the exciting coil. As a result, the entire device becomes larger and the installation space increases, and the cost increases. There is a problem of inviting.

  The present invention has been made to solve the above-described problem, and is a bidirectional solenoid valve capable of opening and closing a valve body with a small driving force even when controlling a large flow rate and maintaining a stable opening and closing state. And a bidirectional solenoid valve block using the same.

In order to achieve the above object, a bidirectional solenoid valve according to the present invention includes a plurality of main valve bodies that open and close a main flow path, and pilot solenoid valves individually provided for each main valve body, be one by generating a differential pressure above and below the respective main valve element the respective main valve body is opened and closed controlled by the operation of the solenoid valves, a plurality of valve body to said single main body integrally bonded The main body is formed with the main flow path communicating with the outside, and each main valve element is provided in correspondence with each main valve body across the main flow path. while each slidably disposed in the bore, the further pilot holes at one end to the main channel at a diameter smaller than that of the slide hole are open for each of the sliding holes are formed individually, each The valve body has an upper space above the main valve body in each sliding hole. Upper and together with a control passage communicating the said pilot hole is formed, the pilot solenoid valve is configured to open and close the control passage, and the above main body in each of the sliding hole It is characterized in that a communication hole is formed to communicate the spaces with each other.

  Further, the bidirectional solenoid valve block of the present invention is configured by integrating a plurality of the above-described bidirectional solenoid valves into a single block.

According to the present invention, since the upper space of the main valve body on the inflow side can be communicated to the low pressure side through the communication hole, the main valve body can be easily sucked and the opening of the main valve body is further increased. And the flow path resistance of the main flow path can be significantly reduced. Further, the driving force required for the opening and closing operation of the control flow is large becomes even if the main valve body can be performed by using only the pressure difference generated between the pipe connected to the main channel. For this reason, it is not necessary to increase the size of the valve opening / closing control mechanism, the entire apparatus can be made compact, and no extra cost is incurred.

  Further, in the bidirectional solenoid valve block according to the present invention, since a plurality of the above-described bidirectional solenoid valves are integrally incorporated in a single block, there is little risk of refrigerant leakage when configuring a refrigerant circuit, for example. The reliability can be improved. Further, since the bidirectional solenoid valves are collectively arranged in the block, the entire apparatus can be reduced in size as compared with the case where the bidirectional solenoid valves are used individually.

Embodiment 1 FIG.
FIG. 1 is a cross-sectional view showing a bidirectional solenoid valve according to Embodiment 1 of the present invention.
As will be described later, the two-way solenoid valve 1 of this embodiment includes two main valve bodies 11a and 11b that open and close the main flow path 8, and pilot solenoids individually provided for the main valve bodies 11a and 11b. Two solenoid valves that are provided with valves 20a and 20b, and that each of the main valve bodies 11a and 11b is controlled to be opened and closed by generating differential pressures above and below the main valve bodies 11a and 11b by operation of the pilot solenoid valves 20a and 20b. (Hereinafter referred to as a float type solenoid valve) 2a and 2b.

  Each float type solenoid valve 2a, 2b is integrated by a single main body 3 made of brass or the like, and two valve bodies 4a, 4b are screwed onto the main body 3 above. It is hermetically sealed by packings 5a and 5b. The valve bodies 4a and 4b are screwed into the main body 3 after main valve bodies 11a and 11b are inserted into sliding holes 12a and 12b described later.

  In the main body 3, main flow paths 8 (8a, 8b, 8c) are formed, and pipes 9, 10 made of copper pipes or the like are brazed to the left and right outer ends of the main flow path 8 by brazing or the like. It is connected. The main body 3 is provided with two main valve bodies 11a and 11b for opening and closing the main flow path 8 so as to be slidable vertically in two sliding holes 12a and 12b crossing the main flow path 8. Pilot holes 13a and 13b each having a smaller diameter than the sliding holes 12a and 12b and having one end opened in the main flow paths 8a and 8b are individually formed for the sliding holes 12a and 12b.

  And upper space 14a, 14b is formed above main valve body 11a, 11b in each sliding hole 12a, 12b, and two flow control holes 15a, 15b, each main valve body 11a, 11b, 16a and 16b are provided.

  On the other hand, control flow channels 19a and 19b are formed in the valve bodies 4a and 4b to connect the upper spaces 14a and 14b above the main valve bodies 11a and 11b and the pilot holes 13a and 13b. Pilot electromagnetic valves 20a and 20b for opening and closing the paths 19a and 19b are provided.

  Here, the control flow paths 19a, 19b extend horizontally from the central passages 191a, 191b, which contact later-described spherical valve bodies 23a, 23b of the pilot electromagnetic valves 20a, 20b, and from the central passages 191a, 191b. , 13b, horizontal passages 192a, 192b having one end opened, and vertical passages formed at the outer sides thereof in parallel with the central passages 191a, 191b and having lower ends opened to the upper spaces 14a, 14b above the main valve bodies 11a, 11b. 193a and 193b.

  Each pilot solenoid valve 20a, 20b has a plunger 22a, 22b slidably disposed in a sleeve 21a, 21b fixed to the valve body 4a, 4b by means such as brazing, and the lower ends of the plungers 22a, 22b. The spherical valve bodies 23a and 23b are fixed to the portion by means such as caulking. Further, suction members 24a and 24b are integrally joined to the upper ends of the sleeves 21a and 21b by TIG welding or the like, and compression springs 25a and 25b are interposed between the suction members 24a and 24b and the plungers 22a and 22b. The attractors 24a and 24b are configured by holding the exciting coils 26a and 26b and a pair of upper and lower holding plates 27a and 27b for forming a magnetic path by bolts 28a and 28b, respectively. ing.

  Therefore, in the pilot solenoid valves 20a and 20b, when the exciting coils 26a and 26b are not energized, the plungers 22a and 22b are urged downward by the compression springs 25a and 25b, and the spherical valve bodies 23a and 23b. Closes the control flow paths 19a and 19b, and when the excitation coils 26a and 26b are energized, the plungers 22a and 22b resist the spring force of the compression springs 23a and 23b by the suction force of the attractors 24a and 24b. Then, the control channels 19a and 19b are opened by being pulled upward.

  Furthermore, in the first embodiment, a communication hole 29 is formed to communicate the upper spaces 14a, 14b above the main valve bodies 11a, 11b in the sliding holes 12a, 12b.

  Next, the operation of the bidirectional solenoid valve having the above configuration will be described.

  For example, when the piping 9 on one side (left side in the figure) is high and the piping 10 on the other side (right side in the figure) is low, either excitation coil of the pilot solenoid valves 20a, 20b Since the spherical valve bodies 23a and 23b are both closed unless energized to 26a and 26b, no fluid flows in the control flow paths 19a and 19b of the valve bodies 4a and 4b.

  Accordingly, in this state, one main valve body 11a slides upward due to a pressure difference between the main flow path 8 and the upper space 14a, but the other main valve body 11b sandwiches the main valve body 11b. Since it is pressed against the lower end of the main body 3 by the pressure difference between the main flow paths 8c and 8b, it remains closed. That is, even if one main valve body 11a is opened, the other main valve body 11b is closed, so that the flow of fluid from one pipe 9 to the other pipe 10 is closed.

  Next, in order to allow fluid to flow from one pipe 9 to the other pipe 10 via the main flow path 8, the excitation coil 26a of one pilot solenoid valve 20a is not energized from the above state, and the other pilot The exciting coil 26b of the electromagnetic valve 20b is energized.

  Then, the plunger 22b is attracted by the attractor 24b by the excitation of the exciting coil 26b, and the spherical valve body 23b is pulled up. For this reason, the upper space 14b above the main valve body 11b communicates with the main flow path 8b having the low-pressure side pipe 10 through the control flow path 19b and the pilot hole 13b. Further, since the upper space 14a above the one main valve body 11a is also communicated with the low pressure side main flow path 8b through the communication hole 29, both the fluids in the upper spaces 14a and 14b are on the low pressure side. To the pipe 10. As a result, the main valve body 11a slides upward so as to supplement the volume of the fluid discharged from the upper space 14a in the one sliding hole 12. That is, the main valve body 11a can be sucked up smoothly by overcoming its own weight due to the pressure difference.

  Thus, by providing the communication hole 29, the main valve body 11a on the high-pressure side can be easily lifted upward, so that the opening degree of the main valve body 11a is sufficiently ensured compared to the case where it is not provided. The flow path resistance of the main valve body 11a can be greatly reduced.

  When the upper end of one main valve body 11a is sucked up to a position where it abuts against the bottom surface of the valve body 4a, the fluid from the high pressure side slides on the flow rate adjusting holes 15a and 16a of the main valve body 11a and the main valve body 11a. Since it flows through a slight gap with the moving hole 12a, a large pressure loss is generated. For this reason, the pressure in each of the upper spaces 14a and 14b is further reduced, and the other main valve body 11b is also sucked upward. It is done. As a result, both the main valve bodies 11a and 11b are sufficiently opened, and the fluid flows through the main flow path 8.

  In the above description, one (the left side in the figure) pipe 9 is at a high pressure, and the other (the right side in the figure) pipe 10 is at a low pressure. The basic operation is the same when the pipe 10 is at high pressure. In this way, fluid can flow in both directions by energizing one of the two pilot solenoid valves 20a, 20b and closing or opening either one of the main valve bodies 11a, 11b. It will function as a solenoid valve.

  The bidirectional solenoid valve is a float type solenoid valve 2a, 2b that opens and closes the main flow path 8 by operating the main valve bodies 11a, 11b by opening and closing the control flow paths 19a, 19b by the pilot solenoid valves 20a, 20b. Therefore, even if the control flow rate is increased, the driving force necessary for opening and closing the main valve bodies 11a and 11b depends only on the differential pressure of the pipes 9 and 10 connected to the main flow path 8. For this reason, even when a large flow rate is controlled, it is not necessary to increase the size of the valve opening / closing control mechanism, the entire apparatus can be made compact, and no extra cost is brought about.

Embodiment 2. FIG.
2 is a front view showing the configuration of the main valve body of the bidirectional solenoid valve according to Embodiment 2 of the present invention, FIG. 3 is a plan view of the main valve body, and FIG. 4 is an operation explanatory view of the main valve body. The components corresponding to those in the first embodiment shown in FIG.

  The feature of the bidirectional solenoid valve of the second embodiment is that notches 32a and 32b are provided at the upper ends of the left and right main valve bodies 11a and 11b. In this example, the notches 32a and 32b are formed at four locations along the circumferential direction, but it is not always necessary to form them at a plurality of locations, and at least one location is formed at the upper end of the main valve bodies 11a and 11b. It only has to be. Further, since there is a bidirectional flow in the main flow path 8, it is necessary to form notches 32a and 32b in both the main valve bodies 11a and 11b.

  In the bidirectional solenoid valve having this configuration, for example, when the pipe 9 on one side (left side in the figure) is at a high pressure and the pipe 10 on the other side (right side in the figure) is at a low pressure, the fluid flows through the main flow path 8. For this purpose, as already described in the first embodiment, the main valve elements 11a and 11b are both opened by energizing the exciting coil 26b of the other pilot solenoid valve 20b.

  In this state, the fluid flowing in from the high-pressure side pipe 9 mainly flows toward the low-pressure side pipe 10 via the main flow path 8 in the main body 3 (hereinafter, this flow is referred to as main flow). In addition to the main flow, the flow adjustment holes 15a and 16a of one main valve body 11a and a small gap between the main valve body 11a and the sliding hole 12a pass through the communication hole 29 from the upper space 14a to the other. The upper space 14b passes through the flow to the upper space 14b in the sliding hole 12b, the flow rate adjusting holes 15b and 16b of the other main valve body 11b, and a slight gap between the main valve body 11b and the sliding hole 12b. Then, there is a flow from the control flow path 19b of the valve body 4b to the other pipe 10 via the pilot hole 13b (hereinafter, a flow other than the main flow is referred to as a pilot flow).

  At this time, for the pilot flow, the flow rate adjusting holes 15a, 16a, 15b, 16b of the main valve bodies 11a, 11b and the fluid passing through the gaps between the main valve bodies 11a, 11b and the sliding holes 12a, 12b are used. Due to friction loss, the pressure generated in the upper spaces 14a and 14b is always lower than the pressure generated in the main flow paths 8a and 8b. As a result, the main valve bodies 11a and 11b are not lowered because they are sucked upward.

  However, when notches 32a and 32b are not provided at the upper ends of the main valve bodies 11a and 11b, the upper ends of the main valve bodies 11a are sucked up by the valve body as shown in FIG. 4A, for example. When contacting the bottom surface of 4a, the pilot flow from the upper space 14a of the main valve body 11a to the upper space 14b of the other main valve body 11b via the communication hole 29 is substantially blocked. As a result, the flow rate of the fluid flowing through the flow rate adjusting holes 15a and 16b of the main valve body 11a is lowered, so that the differential pressure between the upper and lower sides of the main valve body 11a in the sliding hole 12a is reduced. As a result, the main valve body 11a is Descent. Then, since the upper space 14a is expanded again, the flow of the pilot flow is restored, and a differential pressure is generated above and below the main valve body 11a again, so that the main valve body 11a rises again. In this way, a so-called chattering phenomenon occurs in which the main valve element 11a repeats vertical movement by repeating a series of phenomena. When one main valve element 11a causes chattering, the other main valve element 11b also causes chattering due to the influence of the chattering phenomenon, so that the open state of both main valve elements 11a and 11b may not be stable. is there.

  On the other hand, if the notches 32a and 32b are provided at the upper ends of the main valve bodies 11a and 11b, the main valve bodies 11a are formed on the bottom surface of the valve body 4a as shown in FIG. 4B, for example. Even if it abuts, the flow of the pilot flow through the communication hole 29 can be ensured through the notch 32a, so that the chattering phenomenon can be suppressed in both the main valve bodies 11a and 11b, and the main valve bodies 11a and 11b. Both open states can be stabilized.

  In addition, although the case where one (left side in the figure) of the pipe 9 is high pressure and the other (right side of the figure) pipe 10 is low pressure is described here, on the contrary, the one pipe 9 is low pressure, Since the basic operation is the same for the case where the other pipe 10 is at a high pressure, detailed description thereof is omitted. Other configurations and operational effects are the same as those in the first embodiment, and thus detailed description thereof is omitted here.

Embodiment 3 FIG.
FIG. 5 is a plan view showing a state in which the valve body and the pilot solenoid valve are removed from the bidirectional solenoid valve according to the third embodiment of the present invention. The components corresponding to those in the first embodiment shown in FIG. Are given the same reference numerals.

  The bidirectional solenoid valve of the third embodiment is characterized by a plurality of pilot holes 13a and 13b (in this example, provided in parallel with the sliding holes 12a and 12b through which the main valve bodies 11a and 11b slide). 3) It is formed. Since other configurations are the same as those of the first embodiment, detailed description thereof is omitted here.

  In the configuration of the third embodiment, for example, when the pipe 9 on one side (left side in the figure) is at a high pressure and the pipe 10 on the other side (right side in the figure) is at a low pressure, the fluid flows through the main flow path 8. As already described in the first and second embodiments, both the main valve bodies 11a and 11b are opened by energizing the exciting coil 26b of the other pilot solenoid valve 20b.

  In this state, if for some reason the pilot flow is small and a sufficient pressure difference does not occur between the main flow path 8 and the upper spaces 14a and 14b in the sliding holes 12a and 12b, the pilot flow can be increased. The pressure difference can be increased by increasing the friction loss in the flow rate adjusting holes 15a, 16a, 15b, 16b of the main valve bodies 11a, 11b and the gaps between the main valve bodies 11a, 11b and the sliding holes 12a, 12b. .

  In this case, as a means for increasing the pilot flow, for example, in the configuration shown in FIG. 1, the diameters of the pilot holes 13a and 13b provided in parallel with the sliding holes 12a and 12b of the main body 3 are simply increased. However, since the valve bodies 4a and 4b are standard products, the diameter D of the threaded portion of the main body 3 into which the valve bodies 4a and 4b are screwed is naturally determined, and the pilot holes 13a and 13b The diameter of can't be increased. For this reason, the maximum value of the diameter of the pilot holes 13a and 13b is naturally determined.

  Therefore, in the third embodiment, along the circumferential direction of the sliding holes 12a and 12b of the main body 3 so as not to protrude from the diameter D of the threaded portion of the main body 3 to which the valve bodies 4a and 4b are screwed. Pilot holes 13a and 13b are formed at a plurality of locations.

With this structure, the flow resistance of the pilot holes 13a and 13b can be reduced and the pilot flow can be increased accordingly, regardless of the restrictions on the shape of the valve bodies 4a and 4b, so that the main valve bodies 11a and 11b can be increased. The open state of can be kept stable.
Other configurations and operational effects are the same as those of the first embodiment, and thus detailed description thereof is omitted here.

Embodiment 4 FIG.
FIG. 6 is a cross-sectional view showing the main part of the bidirectional solenoid valve according to Embodiment 4 of the present invention, and the same reference numerals are given to the components corresponding to those of Embodiment 1 shown in FIG.

  The characteristic of the bidirectional solenoid valve of the fourth embodiment is that in the communication hole 29 that connects the upper spaces 14a, 14b of the sliding holes 12a, 12b in which the main valve bodies 11a, 11b slide, the axial direction thereof The hole diameter along the front and back is different. That is, the communication hole 29 includes a large-diameter portion 29a and a small-diameter portion 29b smaller in diameter along the axial direction.

  Normally, the communication hole 29 is formed from the outside of the main body 3 by a drill or the like, and is then structured to be airtight by brazing a leak-proof lid member 33, but when the diameter of the communication hole 29 is reduced. The processing yield deteriorates, for example, the drill easily breaks during processing.

  Therefore, by determining the lengths of the large-diameter portion 29a and the small-diameter portion 29b so that the flow path resistances are the same, the structure as described above is used to increase the strength of the large-diameter portion 29a having a long processing distance. The machining yield can be improved by shortening the machining distance in the small-diameter portion 29b that is sufficiently machined using a tool such as a drill and has a high possibility of tool damage. Since other configurations and operational effects are the same as those in the first embodiment, detailed description thereof is omitted here.

Embodiment 5 FIG.
FIG. 7 is a refrigerant circuit diagram in a replaceable packaged air conditioner that cleans and uses existing piping, and FIG. 8 is a plan view of a bidirectional solenoid valve block of the present invention applied to a switching circuit of a subcooling heat exchanger of the refrigerant circuit. 9 is a cross-sectional view of the bidirectional solenoid valve block, FIG. 9A is a cross-sectional view taken along the line AA in FIG. 8, and FIG. 9B is a cross-sectional view taken along the line BB in FIG. FIG. 9C is a cross-sectional view taken along the line CC of FIG.

  In the fifth embodiment, the refrigerant circuit includes an outdoor unit 35, an indoor unit 36, a subcool heat exchanger 37, and the bidirectional solenoid valve block 38 of the present invention, which are sequentially connected via respective pipes 39. Configured. The subcooling heat exchanger 37 plays an auxiliary role in heat exchange by the outdoor unit 35 and adjusts the cooling efficiency of the refrigerant flowing through the pipe 39 or the refrigerant dryness (gas / liquid ratio) at the time of pipe washing in heating operation. Is to do.

  Further, in the bidirectional solenoid valve block 38, a plurality of (two in this example) bidirectional solenoid valves 1A and 1B having the configuration of any one of the first to fourth embodiments are integrated into a single block 41. The refrigerant circuit can be switched between a flow path passing through the subcool heat exchanger 37 or a flow path bypassing the refrigerant circuit.

  That is, one bidirectional solenoid valve 1A provided in the block 41 includes two float solenoid valves 2a and 2b, and the other bidirectional solenoid valve 1B includes two float solenoid valves 2a and 2b. 2b. The float type electromagnetic valve 2b constituting one bidirectional solenoid valve 1A and the float type solenoid valve 2d constituting the other bidirectional solenoid valve 1B are communicated with each other by a flow path 42 formed in the block 41. Yes. Also, the block 41 is provided with four connection ports 43 to 46 for pipe connection. Among them, one connection port 43 is connected to the outdoor unit 35 and the other one connection port 44 is connected to the indoor unit 36. The remaining two connection ports 45 and 46 are both connected to the subcool heat exchanger 37.

  In the refrigerant circuit using the bidirectional solenoid valve block 38 having this configuration, for example, in order to allow the refrigerant to flow from the indoor unit 36 to the outdoor unit 35 without passing through the subcool heat exchanger 37 during heating operation, the bidirectional circuit is used. When the exciting coil of the float type solenoid valve 2a on the connection port 43 side of the solenoid valve 1A is energized, both main valve bodies of the bidirectional solenoid valve 1A are opened, and the subcooling of the connection port 44, the bidirectional solenoid valve 1A, and the connection port 43 A flow path that does not pass through the heat exchanger 21 is formed.

  In order to allow the refrigerant to flow from the indoor unit 36 to the outdoor unit 35 through the subcooling heat exchanger 37 during the heating operation, the float type electromagnetic valve 2c on the side of the connection port 46 of the bidirectional electromagnetic valve 1B is excited. When the coil is energized, both main valves of the bidirectional solenoid valve 1B are opened, and the sub-cooling connection port 44, the bidirectional solenoid valve 1B, the connection port 46, the sub-cool heat exchanger 37, the connection port 45, and the connection port 43 are used. A flow path passing through the heat exchanger 37 is formed.

  In this way, the two-way solenoid valves 1A and 1B are integrally incorporated in the single block 41 to form the two-way solenoid valve block 38, whereby two of the two-way solenoid valves that are generally sold as a single unit. Compared with the case where the equivalent refrigerant circuit is configured by connecting the pipes, brazing points can be reduced when connecting the pipes, reducing the risk of refrigerant leakage and improving the reliability of the refrigerant circuit. Can be made. Further, since the two bidirectional solenoid valves 1A and 1B are collectively arranged in the block 41, the occupied volume is greatly reduced as compared with the conventional case where the two bidirectional solenoid valves 1A and 1B are used individually. In addition, since the refrigerant circuit itself can be configured extremely compactly, the entire apparatus can be reduced in size.

  The bidirectional solenoid valve 1 of the first to fourth embodiments is not limited to the individual configuration of each of the first to fourth embodiments. The characteristic portions of the first to fourth embodiments are appropriately selected. Of course, it can be combined. In addition, the bidirectional solenoid valves of the first to fourth embodiments are configured to include two float type solenoid valves 2a and 2b, but may be configured to include three or more float type solenoid valves. Is possible. Furthermore, the present invention is not limited to the configurations of the first to fifth embodiments, and various modifications can be made without departing from the spirit of the present invention.

It is sectional drawing which shows the bidirectional | two-way solenoid valve in Embodiment 1 of this invention. It is a front view which shows the structure of the main valve body of the bidirectional | two-way solenoid valve in Embodiment 2 of this invention. It is a top view of the main valve body. It is operation | movement explanatory drawing of the main valve body. It is a top view which shows the state which removed the valve body and the pilot solenoid valve in the bidirectional | two-way solenoid valve in Embodiment 3 of this invention. It is sectional drawing which shows the principal part of the bidirectional | two-way solenoid valve in Embodiment 4 of this invention. It is a refrigerant circuit diagram of the replace-type package air conditioner using the bidirectional | two-way solenoid valve block in Embodiment 5 of this invention. It is a top view of the bidirectional | two-way solenoid valve block in Embodiment 5 of this invention. It is sectional drawing of the same bidirectional | two-way solenoid valve block, The figure (a) is sectional drawing which follows the AA line of FIG. 8, The same figure (b) is sectional drawing which follows the BB line of FIG. (C) is sectional drawing which follows the CC line of FIG.

Explanation of symbols

1, 1A, 1B bidirectional solenoid valve, 2a, 2b float type solenoid valve, 3 main body, 4a, 4b valve body, 8 main flow path, 9, 10 piping, 11a, 11b main valve body,
12a, 12b Sliding hole, 13a, 13b Pilot hole, 14a, 14b Upper space, 19a, 19b Control flow path, 20a, 20b Pilot solenoid valve, 29 Communication hole,
29a Large diameter part, 29b Small diameter part, 32a, 32b Notch part,
38 Two-way solenoid valve block, 41 block.

Claims (5)

Equipped with a plurality of main valve bodies that open and close the main flow path, and pilot solenoid valves individually provided for each main valve body, and generates differential pressure above and below each main valve body by the operation of each pilot solenoid valve by a two-way solenoid valve in which the respective main valve body is opened and closed controlled, said plurality of valve body to said single main body is integrally joined to the said main body, in communication with the outside A main flow path is formed, and each main valve body is provided slidably in each slide hole provided corresponding to each main valve body across the main flow path. A pilot hole having a smaller diameter than the sliding hole and having one end opened in the main flow path is formed individually for each sliding hole, while each valve body has a main valve in each sliding hole. A control flow path communicating the upper space above the body with the pilot hole Together they are made, the pilot solenoid valve is configured to open and close the control passage, and in the main body is formed communicating holes communicate with each other the upper space with each other in the respective sliding holes A bidirectional solenoid valve characterized by having 2. The bidirectional solenoid valve according to claim 1, wherein a cutout portion is formed at an upper end portion of the main valve body that contacts the bottom surface of the valve body. 3. The bidirectional solenoid valve according to claim 1, wherein a plurality of the pilot holes are formed in the main body at positions that do not exceed the diameter of the valve body. 4. The bidirectional solenoid valve according to any one of claims 1 to 3, wherein a hole diameter along the axial direction of the communication hole is different between front and rear. 5. A bidirectional solenoid valve block, wherein a plurality of the bidirectional solenoid valves according to claim 1 are integrally incorporated in a single block.

Images