CN217653319U - Protection structure of electromagnetic valve for vehicle - Google Patents

Abstract

The present invention has been made in an effort to provide a protective structure for a vehicle solenoid valve, which can suppress an increase in cost and improve the degree of freedom in layout when suppressing flooding of the solenoid valve. In order to solve the above problem, a protection structure for protecting a solenoid valve with a protective cover, the solenoid valve comprising: a body portion in which a refrigerant flows and in which a valve body is disposed; a refrigerant inlet portion protruding from the main body portion and supplying a refrigerant to the main body portion; a first refrigerant outlet portion and a second refrigerant outlet portion that protrude from the main body portion and discharge the refrigerant from the main body portion; and a solenoid portion that is joined to the main body portion via a joint portion to drive the valve body; the protective cover covers at least the entire solenoid portion, the refrigerant inlet portion, and the first refrigerant outlet portion, and has a first wall portion protruding in the direction of the main body portion between a portion covering the refrigerant inlet portion and the first refrigerant outlet portion, and the joint portion.

Description

Protection structure of electromagnetic valve for vehicle

Technical Field

The present invention relates to a protection structure for a vehicle electromagnetic valve provided in a cooling circuit for cooling various devices mounted on a vehicle such as an electric vehicle.

Background

Conventionally, an electric vehicle equipped with an electric motor, such as an electric vehicle or a hybrid vehicle, has a cooling circuit for cooling a device that generates heat, such as a drive battery or an in-vehicle charger, with cooling water, and the cooling circuit is provided with an electromagnetic valve that controls the flow of the cooling water. For example, patent document 1 discloses a technique related to a battery cooling device in which a heat exchanger is attached to a branch flow path provided in a refrigerant flow path of an air conditioning system in an electric vehicle or a hybrid vehicle including a battery and the air conditioning system, a medium flow path for cooling the battery is connected to the heat exchanger, and an electromagnetic valve is used as a cooling control means for adjusting the flow rates of the refrigerant flowing through the refrigerant flow path and the branch flow path.

[ Prior art documents ]

(patent document)

Patent document 1: japanese patent laid-open No. 2012-248393

Disclosure of Invention

[ problems to be solved by the invention ]

However, since such an electromagnetic valve is an electronic component, in a vehicle which is subjected to immersion in rain water or muddy water, it is necessary to take measures for avoiding the electromagnetic valve from being immersed in such water, but the above patent document 1 does not describe a technique related thereto. As a measure for suppressing the flooding of the solenoid valve, for example, it is conceivable to cover the entire solenoid valve with a cover, or to dispose the solenoid valve at a high position where water splashed by tires does not reach. However, the former causes an increase in cost, and the latter causes a limitation in layout.

Accordingly, an object of the present invention is to provide a protective structure for a vehicle electromagnetic valve, which can suppress an increase in cost and improve the degree of freedom in layout when suppressing flooding of the electromagnetic valve.

[ means for solving the problems ]

(1) The present invention is a protection structure of a vehicle electromagnetic valve for protecting a cooling circuit electromagnetic valve provided in a vehicle by a protective cover, the electromagnetic valve including: a main body part in which a refrigerant flows and in which a valve body is disposed; a refrigerant inlet portion protruding from the main body portion and supplying a refrigerant to the main body portion; a refrigerant outlet portion that protrudes from the main body portion and discharges refrigerant from the main body portion; and a solenoid portion which is joined to the main body portion via a joint portion to drive the valve body; the protective cover covers at least the entire solenoid portion, the refrigerant inlet portion, and the refrigerant outlet portion, and has a first wall portion on an inner side thereof, the first wall portion protruding in a direction of the body portion between a portion covering the refrigerant inlet portion and the refrigerant outlet portion and the joint portion.

(2) In the present invention (1), it is preferable that the protective cover has a bottom plate portion, and the bottom plate portion is provided with a drain hole.

(3) In the present invention (2), it is preferable that the drain hole is disposed at least on a side closer to the solenoid portion than the joint portion.

(4) In any one of (1) to (3), the boot preferably further includes a second wall portion on an inner side thereof, the second wall portion protruding in a direction of the solenoid portion.

(5) In any one of (1) to (4) of the present invention, it is preferable that the protective cover opens in a direction opposite to the joint portion.

(6) In any one of (1) to (5), it is preferable that the protective cover has a harness insertion opening on one side of the solenoid portion, the harness insertion opening allowing a harness connected to the solenoid portion to be inserted from the outside into the protective cover, and the protective cover further has a third wall portion between the harness insertion opening and the joint portion, the third wall portion protruding to one side of the solenoid portion.

(7) In the present invention, in any one of (1) to (6), it is preferable that the protective cover includes an upper cover and a lower cover to which the upper cover is applied, and the upper cover has an outer cover portion that covers the lower cover from the outside.

(Effect of the invention)

(1) According to the present invention, the first wall portion forms a labyrinth structure between the joint portion and the portion covering the refrigerant inlet portion and the refrigerant outlet portion, and thus the joint portion is less likely to be reached even if water enters. If the joint is flooded, there is a high possibility that the function of the solenoid valve is damaged, but since the joint is hardly flooded, the function of the solenoid valve is maintained. According to the present invention, it is possible to realize a simple structure in which the first wall portion is provided on the protective cover, and it is not necessary to dispose the electromagnetic valve at a high position where water is difficult to soak. As a result, when the solenoid valve is prevented from being immersed in water, it is possible to suppress an increase in cost and improve the degree of freedom of layout. The protective cover of the present invention is not required to cover the entire solenoid valve, as long as it has a structure that covers at least the entire solenoid portion, the refrigerant inlet portion, and the refrigerant outlet portion. Therefore, weight reduction is achieved, whereby energy efficiency can be improved.

(2) According to the present invention, since water that has entered the interior of the protective cover can be discharged from the drain hole of the bottom plate, the solenoid valve can be prevented from being immersed in water.

(3) According to the present invention, the drain hole is disposed on the side closer to the solenoid portion than the joint portion, so that the entering water is less likely to flow in the direction of the joint portion, and flooding of the joint portion can be suppressed.

(4) According to the present invention, the solenoid portion can be surrounded and held by the second wall portion of the protective cover, and thus the performance of the solenoid portion can be maintained while suppressing the inclination, positional variation, and the like of the solenoid portion.

(5) According to the present invention, the protective cover is opened in the direction opposite to the joint portion, whereby the joint portion can be prevented from being submerged, and the function of the solenoid valve can be maintained.

(6) According to the present invention, even if water enters the interior of the protective cover from the wire harness insertion opening, the flow of the water is blocked by the third wall portion and is difficult to reach the joint portion. Therefore, flooding of the joint is suppressed, and the function of the solenoid valve is maintained.

(7) According to the present invention, the outer cover portion of the upper cover covered on the lower cover effectively prevents water from entering the interior of the protective cover, and prevents the electromagnetic valve from malfunctioning due to water immersion.

Drawings

Fig. 1 is a side view schematically showing a front portion of a vehicle provided with a protection structure of an electromagnetic valve of an embodiment.

Fig. 2 is a plan view showing a protection structure of a solenoid valve of the embodiment, and is a II arrow view of fig. 3.

Fig. 3 is a sectional view III-III of fig. 2.

Fig. 4 is an arrow view along IV of fig. 3.

Fig. 5 is a perspective view of fig. 3 as viewed obliquely.

Fig. 6 is a perspective view of the protection structure of the solenoid valve according to the embodiment as viewed obliquely from the front.

Fig. 7 is a sectional view VII-VII of fig. 6.

Fig. 8 is a sectional view VIII-VIII of fig. 6.

Reference numerals: 1, a vehicle; 10, a solenoid valve; 11 a main body portion; 12 a refrigerant inlet portion; 13A first refrigerant outlet portion (refrigerant outlet portion); a 13B second refrigerant outlet portion (refrigerant outlet portion); 15. an engaging portion; 16 solenoid portions; 20 a protective cover; 21, covering the upper cover; 22 a lower cover; 24 harness insertion openings; 41 a first wall portion; 42 a second wall portion (third wall portion); 215 outer shroud portion; a 221 bottom plate portion; 225A first drain hole (drain hole); 225B second drain holes (drain holes); 225C third drain hole (drain hole); and G, protecting the structure.

Detailed Description

Hereinafter, a protection structure of a vehicle electromagnetic valve according to an embodiment of the present invention will be described with reference to the drawings. Fig. 1 is a side view schematically showing a front portion of a vehicle 1 provided with an electromagnetic valve 10 of an embodiment. In fig. 1, arrow F indicates the forward direction, which is the traveling direction of the vehicle 1, and arrow B indicates the rearward direction. The vehicle 1 according to the embodiment is an electric vehicle equipped with an electric motor, such as an electric vehicle or a hybrid vehicle. A driving battery 2 is mounted on the vehicle 1. The solenoid valve 10 is provided in a cooling circuit, not shown, that cools the drive battery 2 with cooling water.

As shown in fig. 1, the solenoid valve 10 is disposed slightly rearward of the front wheel 1W. The solenoid valve 10 is disposed between a floor panel 1a and a floor cover 1b below the floor panel 1a of the vehicle 1. The driving battery 2 is disposed behind the electromagnetic valve 10 between the bottom plate 1a and the bottom cover 1 b. A space 1c for disposing the front wheel 1W is provided in a rear portion of the front wheel 1W of the under cover 1 b. For example, water such as rainwater or muddy water splashed during traveling may enter the solenoid valve 10 from the gap 1c.

Fig. 2 to 6 each show a protection structure G of an embodiment in which the solenoid valve 10 is covered with a protection cover 20 for protection. Fig. 2 is a plan view of the protective structure G and is a II arrow view of fig. 3, fig. 3 is a III-III sectional view of fig. 2, fig. 4 is a bottom view and is an IV arrow view of fig. 3, fig. 5 is a perspective view of fig. 3 viewed obliquely, and fig. 6 is a perspective view of the protective structure G. The solenoid valve 10 is supported by the vehicle 1 via a plate-shaped bracket 30. Fig. 2 to 6 show the front F, the rear B, the left L, and the right R of the vehicle 1 with the solenoid valves 10 mounted on the vehicle 1 via the brackets 30, respectively, by arrows. Fig. 7 and 8 are also similar. The directions such as front-back and left-right are referred to as the above directions unless otherwise noted.

As shown in fig. 3 and 5, the overall shape of the solenoid valve 10 has a substantially cylindrical shape. The solenoid valve 10 includes a main body 11 and a solenoid portion 16.

The main body 11 has a cylindrical shape and has a flow path for flowing cooling water serving as a coolant. A valve body for opening and closing the flow path, a support mechanism for the valve body, and the like are incorporated in the main body 11. The internal structure of the body 11 and the internal structure of the solenoid portion 16 including these components are not directly related to the present invention, and therefore are not shown.

The cylindrical body 11 extends in the left-right direction in the axial direction. As shown in fig. 4 and 6, near the axial center portion of the main body 11, there are provided: a refrigerant inlet portion 12 protruding forward; and two refrigerant outlet portions, i.e., a first refrigerant outlet portion 13A and a second refrigerant outlet portion 13B, project rearward. The first refrigerant outlet port 13A and the second refrigerant outlet port 13B are separated from each other in the left-right direction. The first refrigerant outlet port 13A is disposed on the right side, which is the solenoid portion 16 side, and the second refrigerant outlet port 13B is disposed on the left side of the first refrigerant outlet port 13A. The refrigerant inlet 12 is disposed between the first refrigerant outlet 13A and the second refrigerant outlet 13B in the lateral direction. The refrigerant inlet 12 and the refrigerant outlets 13A and 13B are each a tubular joint portion. A refrigerant supply hose 121 is connected to the refrigerant inlet portion 12. Refrigerant discharge hoses 131 are connected to the two refrigerant outlet portions 13A and 13B, respectively.

The end of the refrigerant supply hose 121 on the main body 11 side is connected to the refrigerant inlet 12 in a manner covering the refrigerant inlet 12, and is fixed by a fastening band 122 in a state connected to the refrigerant inlet 12. Similarly, the end portion of the refrigerant discharge hose 131 on the main body 11 side covers and is connected to the refrigerant outlet portions 13A and 13B, and is fixed by the fastening band 132 in a state of being connected to the refrigerant outlet portions 13A and 13B. The cooling water enters the flow path inside the main body 11 from the refrigerant supply hose 121 via the refrigerant inlet 12, flows through the flow path, branches to the refrigerant outlet portions 13A and 13B, and is discharged from the refrigerant discharge hoses 131.

As shown in fig. 3 and 5, a solenoid portion 16 is connected to the right end portion of the body portion 11 in the axial direction via a joint portion 15. The solenoid portion 16 is a valve body driving portion that opens and closes a valve body in the main body portion 11. The solenoid portion 16 is cylindrical and is disposed substantially coaxially with respect to the main body portion 11.

Fig. 7 is a sectional view along line VII-VII of fig. 6, and fig. 8 is a sectional view along line VIII-VIII of fig. 6. As shown in fig. 7 and 8, a coupler 17 is attached to the solenoid portion 16, and a not-shown harness for supplying power is connected to the coupler 17. The solenoid portion 16 is driven to open and close the valve body inside the body portion 11.

A plurality of bolt fastening portions 111 are provided on the upper surface of the main body portion 11, and the bolt fastening portions 111 have screw holes into which bolts 39 for fixing a bracket 30 described later are screwed.

The boot 20 does not cover the entire solenoid valve 10, but covers a part of the body portion 11 on one side of the solenoid portion 16 and the entire solenoid portion 16 in the axial direction.

As shown in fig. 2 to 6, the protective cover 20 is composed of an upper cover 21 disposed on the upper side and a lower cover 22 disposed on the lower side. The upper cover 21 has a top plate 211 and an upper side wall 212, and the upper side wall 212 is formed to hang down from the top plate 211 and surround the periphery. The lower cover 22 includes a bottom plate 221 and a lower side wall 222, and the lower side wall 222 is formed to rise from the bottom plate 221 so as to surround the periphery. The upper cover 21 and the lower cover 22 are both molded bodies of synthetic resin. The top plate 211 of the upper cover 21 is integrally formed with the upper side wall 212, and the bottom plate 221 of the lower cover 22 is integrally formed with the lower side wall 222. The upper side wall portion 212 and the lower side wall portion 222 constitute the entire side wall portion 23 of the protective cover 20.

The upper side wall portion 212 of the upper cover 21 and the lower side wall portion 222 of the lower cover 22 facing each other are joined to each other, whereby the protective cover 20 is assembled as the protective cover 20 having the housing space of the solenoid valve 10 therein. As shown in fig. 3, a plurality of hooks 214 are provided on an edge portion of the upper side wall portion 212 of the upper cover 21, and a protrusion 224 is provided on an edge portion of the lower side wall portion 222 of the lower cover 22, and each of the plurality of hooks 214 is detachably engaged with the protrusion 224. The hook portions 214 engage with the projections 224, whereby the upper cover 21 and the lower cover 22 are detachably assembled to each other.

As shown in fig. 4, the protective cover 20 has a harness insertion opening 24. The harness insertion opening 24 is formed by a notch formed at an opening edge of the lower side wall portion 222 of the lower cover 22. As described above, the coupler 17 attached to the solenoid portion 16 is connected to the power supply harness. The wire harness is inserted from the outside of the protective cover 20 through the wire harness insertion opening 24 into the inside of the protective cover 20, and is connected to the coupler 17.

As shown in fig. 7, the top plate 211 of the upper cover 21 assembled to the lower cover 22 is slightly inclined forward and downward. An outer cover portion 215 is formed in a front portion of the upper side wall portion 212 of the upper cover 21, and the outer cover portion 215 covers the lower side wall portion 222 of the lower cover 22 from the outside. The outer cover portion 215 extends downward by a predetermined length and covers the lower side wall portion 222 of the lower cover 22 from the outside. Thereby, a labyrinth structure is formed between the upper cover 21 and the lower cover 22.

As shown in fig. 7, a pair of front and rear fitting pieces 256, 257 extending downward are provided on the rear side of the upper side wall portion 212 of the upper cover 21. The lower side wall portion 222 of the lower cover 22 is fitted and sandwiched between these fitting pieces 256, 257. Thereby, a labyrinth structure is formed between the upper cover 21 and the lower cover 22.

As shown in fig. 4, the bottom plate portion 221 of the lower cover 22 is provided with three drain holes, i.e., a first drain hole 225A, a second drain hole 225B, and a third drain hole 225C. These drainage holes 225A, 225B, 225C are short slits extending in the front-rear direction. The discharge holes 225A, 225B, 225C are arranged at intervals in the left-right direction at the rear end of the bottom plate 221. The first drain hole 225A and the second drain hole 225B are provided on the side covering the main body portion 11, and the third drain hole 225C is provided on the side covering the solenoid portion 16. The third drain hole 225C is disposed on the solenoid portion 16 side of the joint portion 15. The number of the drain holes is not limited to three, and may be one or more, but a plurality of drain holes are preferably provided in the bottom plate portion 221 in a dispersed manner. Further, at least one drain hole is preferably disposed on the side closer to the solenoid portion 16 than the joint portion 15.

As shown in fig. 3 and 5, the protective cover 20 has a center cover portion 25, and the center cover portion 25 covers the refrigerant inlet portion 12 and the first refrigerant outlet portion 13A in the vicinity of the axial center portion of the main body portion 11. Center cover portion 25 is formed of cover portions 217 and 227 provided in upper cover 21 and lower cover 22, respectively. A first wall portion 41 protruding in the direction of the body portion 11 is provided on the solenoid portion 16 side (right side) of the center cover portion 25. The first wall 41 is formed of a first wall piece 218 and a first wall piece 228 integrally formed with the upper cover 21 and the lower cover 22, respectively.

The first wall portion 41 is disposed between the center cover portion 25 and the joint portion 15. The inner space of the center cover portion 25 covering the refrigerant inlet 12 and the first refrigerant outlet 13A is surrounded by the first wall portion 41 and the side wall portion 23 of the entire protection cover 20.

As shown in fig. 3 and 5, a second wall portion 42 protruding in the direction of the solenoid portion 16 is provided on the inner side of the protective cover 20 on the solenoid portion 16 side. The second wall portion 42 is formed of a second wall piece 219 and a second wall piece 229 that are integrally formed with the upper cover 21 and the lower cover 22, respectively. The second wall portion 42 is disposed at a position corresponding to a substantially central portion in the axial direction of the solenoid portion 16. The second wall portion 42 sandwiches the solenoid portion 16 in such a manner as to suppress the solenoid portion 16 from toppling over.

The second wall portion 42 is disposed between the harness insertion opening 24 and the joint portion 15. Therefore, the second wall portion 42 has a structure that doubles as the third wall portion of the present invention.

As shown in fig. 3 and 5, the protective cover 20 has an opening 26 at its left end, and the main body 11 of the solenoid valve 10 is inserted into the opening 26. In the solenoid valve 10, a portion on the left side of the opening 26 including the second refrigerant outlet portion 13B is not covered with the protective cover 20 and is exposed to the outside. That is, the opening 26 opens in the protective cover 20 in the direction opposite to the joint 15.

As shown in fig. 3 and 5, a center partition wall 43 is provided between the first wall 41 and the second wall 42 of the protective cover 20. The central partition wall 43 is composed of a partition 431 and a partition 432 that are integrally formed with the upper cover 21 and the lower cover 22, respectively. Thus, the first chamber 271, the second chamber 272, the third chamber 273, and the fourth chamber 274 partitioned by the first wall portion 41, the center partition wall portion 43, and the second wall portion 42, respectively, are formed inside the protective cover 20.

As shown in fig. 8, a first protrusion piece 441 protruding in the direction of the solenoid valve 10 is formed between the partition piece 431 of the upper cover 21 and the refrigerant inlet portion 12. The first protruding piece 441 is adjacent to the refrigerant inlet portion 12, and is formed to be inclined as approaching the refrigerant inlet portion 12 toward the inside.

As shown in fig. 8, a second projection 442 and a third projection 443 projecting in the direction of the solenoid valve 10 are formed between the first refrigerant outlet portion 13A and the second refrigerant outlet portion 13B of the upper cover 21. The second projecting piece 442 is close to the first refrigerant outlet portion 13A, and is formed obliquely so as to approach the first refrigerant outlet portion 13A toward the inside. The third projection 443 is located close to the second refrigerant outlet portion 13B and extends straight inward.

As shown in fig. 2 and 5, a frame-shaped protrusion 21c having a rectangular shape is provided on the upper surface of the upper cover 21. A pair of front and rear elastic claw pieces 21d extending upward are provided on the convex portion 21c. The elastic claw piece 21d can be elastically deformed so as to be flexed in the front-rear direction.

As shown in fig. 2 and 3, the holder 30 is disposed above the main body 11. The holder 30 has a rectangular positioning hole 30a, and the positioning hole 30a is fitted with the convex portion 21c of the upper cover 21. When the protrusion 21c of the upper cover 21 is fitted into the positioning hole 30a from below, the holder 30 is positioned with respect to the solenoid valve 10 and the protective cover 20. At this time, the elastic claw piece 21d is elastically engaged around the positioning hole 30a of the holder 30 from above, and the holder 30 is fixed to the protective cover 20. The bracket 30 is fixed to the upper surface of the main body 11 by screwing and fastening the bolts 39 into the bolt fastening portions 111, and the bolts 39 are inserted through a plurality of bolt insertion holes, not shown, formed in the bracket 30. Thereby, the solenoid valve 10, the protective cover 20, and the holder 30 are integrated.

The stent 30 has a plurality of strut portions 31. In this case, the stay portion 31 has three stay portions 31, that is, one stay portion 31 protruding forward and left and right stay portions 31 protruding rearward. These stay portions 31 are fixed to a frame of the vehicle 1 or a stay or the like supported by the frame by bolts 38. Thereby, the solenoid valve 10 and the protective cover 20 are fixed to predetermined portions of the vehicle 1 via the bracket 30.

The protection structure G of the solenoid valve 10 of the embodiment is described above. Here, the protection effect from muddy water by the protective structure G will be described.

An arrow D1 of fig. 3 schematically shows a path of muddy water entering the second chamber 272 from above through a gap between the upper cover 21 and the solenoid valve 10. As shown by the arrow D1, the muddy water is restrained from intruding into the third chamber 273 in which the joint portion 15 is disposed and being discharged from the second water discharge hole 225B to the outside of the protection cover 20 by the center partition wall portion 43. This suppresses the muddy water from infiltrating the joint portion 15.

An arrow D2 in fig. 6 and 7 shows a state where muddy water splashed by the vehicle 1 is splashed on the front surface of the protective cover 20. Since the labyrinth structure is formed between the upper cover 21 and the lower cover 22 by the outer cover portion 215 of the upper cover 21 on the front surface of the protective cover 20, muddy water splashed on the front surface of the protective cover 20 is less likely to enter the protective cover 20.

As shown by an arrow D3 in fig. 7, muddy water may splash from behind onto the rear surface of the protective cover 20. Since a labyrinth structure is formed between the upper cover 21 and the lower cover 22 by the pair of front and rear fitting pieces 256, 257 of the upper cover 21 on the rear surface of the protective cover 20, muddy water splashed on the rear surface of the protective cover 20 is less likely to enter the protective cover 20.

An arrow D4 in fig. 6 and 8 shows muddy water that has entered the protective cover 20 in the direction toward the solenoid portion 16 through the gap between the upper cover 21 and the refrigerant inlet portion 12. As shown in fig. 8, the muddy water splashes on the first projecting piece 441 of the upper cover 21, thereby preventing further invasion, and making it difficult to reach the solenoid portion 16 and the joint portion 15. Further, adhesion of mud to the central partition wall portion 43 including the partition sheet 431 is suppressed.

Further, an arrow D5 in fig. 8 shows muddy water entering the boot 20 in a direction toward the solenoid portion 16 through a gap between the upper cover 21 and the second refrigerant outlet portion 13B. Since the clearance is formed into a labyrinth structure by the second projecting piece 442 and the third projecting piece 443, the muddy water is prevented from further entering, and hardly reaches the solenoid portion 16 and the joint portion 15.

According to the protection structure G of the solenoid valve 10 of the embodiment described above, the following effects are exhibited.

(1) A protection structure G of a solenoid valve 10 according to an embodiment is a protection structure G for protecting a solenoid valve 10 for a cooling circuit provided in a vehicle 1 with a protective cover 20, and the solenoid valve 10 includes: a body 11 in which a refrigerant flows and a valve body is disposed; a refrigerant inlet portion 12 protruding from the main body portion 11 and supplying a refrigerant to the main body portion 11; a first refrigerant outlet portion 13A and a second refrigerant outlet portion 13B that protrude from the main body portion 11 and discharge the refrigerant from the main body portion 11; and a solenoid portion 16 joined to the main body portion 11 via a joint portion 15 to drive the valve body; the protective cover 20 covers at least the entire solenoid portion 16, the refrigerant inlet portion 12, and the first refrigerant outlet portion 13A, and the protective cover 20 has a first wall portion 41 on the inner side thereof, the first wall portion 41 protruding in the direction of the body portion 11 between a portion covering the refrigerant inlet portion 12 and the first refrigerant outlet portion 13A, and the joint portion 15.

According to this embodiment, the first wall portion 41 forms a labyrinth structure between the joint portion 15 and the portion covering the refrigerant inlet portion 12 and the first refrigerant outlet portion 13A, and thus the joint portion 15 is less likely to be reached even if water enters. If the joint 15 is flooded, the function of the solenoid valve 10 is likely to be impaired, but since the joint 15 is less likely to be flooded, the function of the solenoid valve 10 is maintained. Since the first wall portion 41 is provided only on the protective cover 20, it is possible to suppress an increase in cost and it is not necessary to dispose the solenoid valve 10 at a high position where it is difficult to immerse water. As a result, when the electromagnetic valve 10 is prevented from being immersed in water, it is possible to suppress an increase in cost and improve the degree of freedom of layout. The protective cover 20 of the present invention does not need to cover the entire solenoid valve 10 as long as it has a structure that covers at least the entire solenoid portion 16, the refrigerant inlet portion 12, and the first refrigerant outlet portion 13A. Therefore, weight reduction is achieved, whereby energy efficiency can be improved.

(2) In the protection structure G of the electromagnetic valve 10 according to the embodiment, the protection cover 20 preferably includes a bottom plate portion 221, and the bottom plate portion 221 is provided with a first drain hole 225A, a second drain hole 225B, and a third drain hole 225C.

Accordingly, water that has entered the interior of the protective cover 20 can be drained from at least one of the first drain hole 225A, the second drain hole 225B, and the third drain hole 225C, and therefore, flooding of the solenoid valve 10 can be prevented.

(3) In the protection structure G of the solenoid valve 10 according to the embodiment, it is preferable that the drain hole is disposed at least on the side closer to the solenoid portion 16 than the joint portion 15, and the third drain hole 225C is disposed on the side closer to the solenoid portion 16 than the joint portion 15.

This makes it difficult for the entering water to flow into the joint 15, and prevents the joint 15 from being submerged.

(4) In the protection structure G of the solenoid valve 10 according to the embodiment, the protective cover 20 preferably further includes a second wall portion 42 on the inner side thereof, and the second wall portion 42 preferably protrudes in the direction of the solenoid portion 16.

This allows the solenoid portion 16 to be surrounded and held by the second wall portion 42, and the performance of the solenoid valve 10 can be maintained by suppressing the inclination, positional variation, and the like of the solenoid portion 16 by the second wall portion 42.

(5) In the protection structure G of the solenoid valve 10 according to the embodiment, the protective cover 20 preferably has an opening portion 26 that opens in a direction opposite to the joint portion 15.

By opening the protective cover 20 in the direction opposite to the joint 15, the joint 15 can be prevented from being submerged, and the function of the solenoid valve 10 can be maintained.

(6) In the protection structure G of the solenoid valve 10 according to the embodiment, it is preferable that the protective cover 20 has the harness insertion opening 24 on the solenoid portion 16 side, the harness insertion opening 24 allowing the harness connected to the solenoid portion 16 to be inserted from the outside into the protective cover 20, and the protective cover 20 further has the second wall portion 42 as a third wall portion between the harness insertion opening 24 and the joint portion 15, the second wall portion 42 protruding to the solenoid portion 16 side.

Thus, even if water enters the interior of the protective cover 20 from the harness insertion opening 24, the flow of the water is blocked by the third wall portion and is less likely to reach the joint portion 15. Therefore, the joint 15 is inhibited from being soaked in water while the function of the solenoid valve 10 is maintained.

(7) In the protection structure G of the solenoid valve 10 according to the embodiment, the protection cover 20 preferably includes an upper cover 21 and a lower cover 22 covering the upper cover 21, and the upper cover 21 preferably has an outer cover portion 215 covering the lower cover 22 from the outside.

The outer cover portion 215 of the upper cover 21 covering the lower cover 22 effectively prevents water from entering the protective cover 20, thereby preventing a functional failure of the solenoid valve 10 due to water intrusion.

While the present invention has been described with reference to the specific embodiments, the present invention is not limited to the embodiments described above, and modifications, improvements, and the like that are within the scope of achieving the object of the present invention are also included in the scope of the present invention.

For example, the solenoid valve 10 of the embodiment has a cylindrical shape, and the solenoid portion is concentrically disposed at one end portion of the body portion. The first wall portion of the present invention may be disposed between the joint portion between the main body portion and the solenoid portion and the joint portion, so long as the joint portion prevents the joint portion from being immersed in water.

In the above embodiment, the second wall portion 42 also serves as the third wall portion of the present invention, but the third wall portion may be provided separately.

Claims (7)

1. A protection structure of a vehicle solenoid valve for protecting a solenoid valve for a cooling circuit provided in a vehicle by a protective cover,

the electromagnetic valve comprises:

a body portion in which a refrigerant flows and in which a valve body is disposed;

a refrigerant inlet portion protruding from the main body portion and supplying a refrigerant to the main body portion;

a refrigerant outlet portion that protrudes from the main body portion and discharges refrigerant from the main body portion; and a (C) and (D) and,

a solenoid portion engaged with the main body portion via an engagement portion to drive the valve body; and also,

the protective cover covers at least the entire solenoid portion, the refrigerant inlet portion and the refrigerant outlet portion,

the protective cover has, on the inner side thereof, a first wall portion that protrudes in the direction of the body portion between a portion that covers the refrigerant inlet portion and the refrigerant outlet portion and the joint portion.

2. The protective structure of the vehicular electromagnetic valve according to claim 1, wherein the protective cover has a bottom plate portion, and a drain hole is provided in the bottom plate portion.

3. The protective structure of a vehicular electromagnetic valve according to claim 2, wherein the drain hole is disposed at least on a side closer to the solenoid portion than the joint portion.

4. A protective structure of a vehicular electromagnetic valve according to any one of claims 1 to 3, wherein the protective cover further has a second wall portion on an inner side thereof, the second wall portion protruding in a direction of the solenoid portion.

5. The protective structure of the vehicular electromagnetic valve according to any one of claims 1 to 3, wherein the protective cover opens in a direction opposite to the engagement portion.

6. The protective structure of a vehicular electromagnetic valve according to any one of claims 1 to 3, wherein,

the protective cover has a harness insertion opening on one side of the solenoid portion, the harness insertion opening allowing a harness connected to the solenoid portion to be inserted from the outside to the inside of the protective cover,

the protective cover further includes a third wall portion between the wire harness insertion opening and the joint portion, the third wall portion projecting toward one side of the solenoid portion.

7. The protective structure of a vehicular electromagnetic valve according to any one of claims 1 to 3, wherein the protective cover includes an upper cover and a lower cover to which the upper cover is applied, and the upper cover has an outer cover portion that covers the lower cover from an outer side.

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