JP2016003688A - Valve body, valve device and air conditioner - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a valve body, a valve device and an air conditioner capable of maintaining sealability while easily imparting the sealability to a slide contact surface.SOLUTION: Plural recess parts 632 provided on a slide contact surface 631 of a valve body 63 are provided side by side over the interval between both ends in an orthogonal direction, and thereby a closed space can be filled with a small amount of oil, and sealability can be imparted to the slide contact surface 631. Further, the recess parts 632 form a closed space, and thereby sealability with which oil is hard to leak is easily maintained. Even when a scar is formed at part of the recess parts 632 to communicate with a main valve chamber S2, and oil is easy to leak, sealability can be maintained by oil taken into the other recess parts 632.

Description

  The present invention relates to a valve body that opens and closes a valve port with respect to a valve chamber by slidingly moving on a valve seat surface, a valve device including the valve body, and an air conditioner including the valve device.

  Conventionally, as a valve device provided in an air conditioner, a four-way valve in which a concave portion is formed on a sliding surface of a valve body with a valve seat surface has been disclosed (for example, see Patent Document 1). In the four-way valve of an air conditioner described in Patent Document 1, a valve body is accommodated in a valve chamber formed in a valve housing, and a valve seat surface in which a plurality of valve ports opened toward the valve chamber are formed. By sliding and moving in a straight line, the flow direction of the fluid in the air conditioner can be switched. As shown in FIG. 10A, the sliding contact surface 101 of the valve body 100 with the valve seat surface has an opening 102 in a communication space that communicates two valve ports, and an annular recess 103 that surrounds the opening 102. And are formed.

  In such a valve body 100, when sliding on the valve seat surface, the oil contained in the fluid flowing through the flow path portion of the air conditioner is taken into the concave portion 103, and this oil causes the valve seat surface and the sliding contact surface 101 to be in contact with each other. The gap between the two is closed and the sealing performance is improved. Furthermore, a low-pressure fluid flows in the communication space inside the valve body 100, and a high-pressure fluid flows outside. The formation of the recess 103 reduces the contact area with the valve seat surface. The pressure is increased and the sealing performance is further improved. When the sealing performance at the sliding contact surface is improved, mixing of the fluid is suppressed between the inside and the outside of the valve body 100.

  Moreover, the valve body in which the groove part extended in a sliding direction was formed in the sliding contact surface is also disclosed (for example, refer patent document 2). In the valve body 200 described in Patent Document 2, as shown in FIG. 10B, the sliding contact surface 201 has a recess 203 extending in the sliding direction at a position sandwiching the opening 202 from both sides in the sliding direction. Is formed. In such a valve body 200, the recess 203 extends to the end of the sliding contact surface 201 in the sliding direction, so that oil contained in the fluid can be easily taken into the recess 203.

JP 2008-133895 A JP 2013-227994 A

  However, in the valve body 100 of Patent Document 1 as described above, in order to have a sealing function with oil, it is necessary to fill the entire recess 103 with oil evenly. Giving was difficult. On the other hand, in the valve body 200 of Patent Document 2, although it is easy to take oil into the recess 203, it is easy for oil to come out and it is difficult to maintain the sealing performance.

  In addition, in the valve body 100 of Patent Document 1, in order to increase the surface pressure and improve the sealing performance, the planar view area of the recess 103 (that is, the figure) with respect to the entire area of the sliding contact surface 101 excluding the opening 102. The area of the hatched portion in 10 (A) must be made larger. However, when the area in plan view is increased, the surface tension is lowered in the recess 103 and oil is easily removed, so that it is difficult to maintain the sealing performance, and it is difficult to achieve both the provision and maintenance of the sealing performance.

  An object of the present invention is to provide a valve body, a valve device, and an air conditioner capable of easily imparting a sealing property to a sliding contact surface and maintaining the sealing property.

  In order to solve the above-mentioned problems and achieve the object, the invention described in claim 1 is characterized in that one or a plurality of valve ports are accommodated in a valve chamber formed in the valve housing and open toward the valve chamber. A valve body having a main body portion that opens and closes at least a part of the valve port with respect to the valve chamber by slidingly moving in a linear sliding direction on the valve seat surface formed with A plurality of recesses that form a closed space with the valve seat surface are provided in a sliding contact surface that is overlapped with the valve seat surface in a portion, and the plurality of recesses are at least the sliding on the sliding contact surface The valve body is arranged in parallel between both ends in a direction orthogonal to the direction.

  According to a second aspect of the present invention, in the first aspect of the present invention, a plurality of the valve ports are formed on the valve seat surface, and the main body portion includes at least two valve ports in the valve chamber. The communication port is configured to be closed at the same time, and has a communication space opened toward the valve seat surface in the sliding contact surface so as to communicate the valve ports with each other, and the plurality of recesses are formed in the communication space. The valve element is arranged so as to surround the opening.

  According to a third aspect of the present invention, the valve seat is formed in a valve chamber formed in the valve housing and has a plurality of valve ports opened toward the valve chamber. A valve body having a main body portion that opens and closes at least a part of the valve port with respect to the valve chamber by sliding and rotating in the sliding direction, and is slid on the valve seat surface in the main body portion. The contact surface is provided with a plurality of recesses that form a closed space with the valve seat surface, and the main body is configured to simultaneously close at least two of the valve ports with respect to the valve chamber. And the sliding contact surface has a communication space opened toward the valve seat surface so as to communicate with each other, and the plurality of recesses are disposed so as to surround the opening of the communication space. It is the valve body characterized by this.

  The invention described in claim 4 is the invention described in any one of claims 1 to 3, wherein a trajectory at the time of sliding of the main body part in at least a part of the plurality of recesses is the sliding direction. It is arrange | positioned so that it may line up in the orthogonal direction with no gap.

  According to a fifth aspect of the present invention, there is provided a valve housing forming a valve chamber, a valve seat having a valve seat surface formed with one or more valve ports opened toward the valve chamber, and the valve chamber. A valve body that is accommodated and that opens and closes the valve port with respect to the valve chamber by sliding in a predetermined sliding direction on the valve seat surface, the valve body comprising: A valve device comprising the valve body according to any one of claims 1 to 4.

  The invention described in claim 6 includes a first flow path part in which an outdoor heat exchanger, an expansion valve, and an indoor heat exchanger are connected in order, a second flow path part to which a compressor is connected, and the first An air conditioner comprising four valve ports respectively connected to both ends of one flow path part and the second flow path part, and a valve device for switching the flow direction of fluid in the first flow path part. And the said valve apparatus is comprised with the valve apparatus of Claim 5, It is an air conditioner characterized by the above-mentioned.

  According to the first aspect of the present invention, the plurality of recesses provided on the sliding contact surface of the main body are arranged in parallel across both ends in a direction (orthogonal direction) perpendicular to the sliding direction on the sliding contact surface. Therefore, compared with the configuration in which one concave portion extends in the orthogonal direction, the volume of the closed space formed by one concave portion is reduced, and this closed space can be filled with a small amount of oil. Sealing properties can be easily imparted to the contact surface. Further, even if some of the recesses are not filled with oil, the sealability can be ensured by the other recesses filled with oil.

  Furthermore, since the recess forms a closed space with a relatively small volume, it is difficult for oil to escape and it is easy to maintain the sealing performance. Furthermore, even if a part of the plurality of recesses is scratched and communicates with the valve chamber to make it easy for oil to escape, the sealability can be maintained by the other recesses. In addition, even if the area other than the concave portion on the sliding surface is reduced to increase the surface pressure and improve the sealing performance, the increase in the number of the concave portions can be suppressed, and the oil surface in the concave portion can be suppressed. It is possible to maintain a sealing property by suppressing a decrease in tension.

  According to the invention described in claim 2, since the plurality of recesses surround the opening, the sealing performance can be improved around the opening, and the fluid in the valve chamber, the fluid in the communication space, Can be effectively prevented from mixing.

  According to the invention described in claim 3, since the plurality of recesses are provided on the sliding contact surface of the main body portion, the sealing performance can be easily given to the sliding contact surface and the sealing performance is maintained. can do. Furthermore, since the plurality of recesses surround the opening, the sealing performance can be improved around the opening.

  According to the invention described in claim 4, since the locus when the main body portion slides in at least some of the concave portions is arranged so as to be aligned in the direction orthogonal to the sliding direction without any gap, When the surface slidably contacts the valve seat surface, oil is applied to this interface without any gaps, and even if the fluid tries to pass through the oiled area along the sliding direction, the fluid is blocked by the oil. The sealing performance can be further improved.

  According to the fifth aspect of the present invention, since the valve device has the valve body as described above, it is possible to easily give the sliding contact surface a sealing property and to maintain the sealing property. it can. Moreover, it can suppress that the fluid which each passes through the space divided by the valve body will mix.

  According to the invention described in claim 6, since the air conditioner has the valve device as described above, the sealing performance can be easily given to the sliding contact surface of the valve body, and the sealing performance can be improved. Can be maintained. Moreover, it can suppress that the fluid which each passes through the space divided by the valve body will mix, and can suppress the fall of the operating efficiency of an air conditioner.

It is a lineblock diagram showing the whole air harmony machine concerning an embodiment of the present invention. It is a top view which shows the sliding contact surface of the valve body provided in the valve apparatus used for the air conditioner of FIG. It is sectional drawing which follows the II line | wire of FIG. It is sectional drawing which expands and shows the principal part of FIG. It is a top view which expands and shows the principal part of FIG. (A)-(E) are top views which show the sliding contact surface of the valve body of a modification. (A)-(D) are sectional drawings which show the principal part of the valve body in a modification. (A), (B) is a top view which shows the slidable contact surface of the valve body in another modification. It is a top view which shows the slidable contact surface of the valve body in another modification. (A), (B) is a top view which shows the sliding contact surface of the conventional valve body.

  Hereinafter, embodiments of the present invention will be described with reference to the drawings. As shown in FIG. 1, the air conditioner 1 of the present embodiment includes a first flow path unit 10 in which an outdoor heat exchanger 2, an expansion valve 3, and an indoor heat exchanger 4 are connected in order, and a compressor 5. The connected 2nd flow-path part 20, the valve apparatus 6 connected to the 1st flow-path part 10 and the 2nd flow-path part 20, and the pilot valve 7 for switching the valve apparatus 6 are provided. The air conditioner 1 is configured to be capable of switching between a cooling operation and a heating operation. A fluid such as a refrigerant (not shown) is flowed through the flow path portions 10 and 20 to exchange heat in the indoor heat exchanger 4. Cool or warm.

  The outdoor heat exchanger 2 is configured to reduce the temperature by radiating a high-temperature fluid to the outside during the cooling operation and to increase the temperature by absorbing the low-temperature fluid from the outside during the heating operation. .

  The expansion valve 3 is configured to adiabatically expand the fluid passing therethrough and to depressurize the fluid.

  The indoor heat exchanger 4 is configured to absorb a low temperature fluid from the room during the cooling operation to increase the temperature, and during the heating operation to dissipate the high temperature fluid into the room to decrease the temperature. .

  As for the 1st flow path part 10, the edge part by the side of the outdoor heat exchanger 2 is connected to the C joint pipe 84 which the valve apparatus 6 mentions later, the edge part by the side of the indoor heat exchanger 4 is connected to the E joint pipe 82, The flow direction of the fluid is configured to be a direction from the C joint pipe 84 to the E joint pipe 82 during the cooling operation, and to be a direction from the E joint pipe 82 to the C joint pipe 84 during the heating operation.

  The compressor 5 is connected between a D joint pipe 81 and an S joint pipe 83, which will be described later, of the valve device 6, and is configured to compress the passing fluid to a high pressure. The flow direction of the fluid in the second flow path portion 20 is always the direction from the S joint pipe 83 toward the D joint pipe 81.

  The valve device 6 is a four-way valve, and is accommodated in the valve chamber S1, the valve housing 61 forming the valve chamber S1, the valve seat 62 having the valve seat surface 621 in which the valve ports 62A to 62C are formed, and the valve chamber S1. A valve body 63 that opens and closes part of the valve ports 62A to 62C with respect to the valve chamber S1 by sliding in a linear sliding direction (left-right direction in FIG. 1) on the valve seat surface 621, and the valve body 63 Are provided with a pair of piston portions 64 and 65, a D joint pipe 81, an E joint pipe 82, an S joint pipe 83, and a C joint pipe 84.

  The valve housing 61 is made of, for example, a metal such as brass or stainless steel, and integrally includes a cylindrical portion 611 having a cylindrical shape and two cap portions 612A and 612B having a substantially circular dish shape. The cap portions 612A and 612B are attached by brazing, welding, or the like so as to close the end portion of the cylindrical portion 611, respectively. A fluid inlet hole 61A that opens to a later-described main valve chamber S2 of the valve chamber S1 is formed at a position facing the valve seat 62 in the central portion of the cylindrical portion 611. Pipes 613A and 613B connected to the pilot valve 7 are connected to the cap portions 612A and 612B, respectively.

  The valve seat 62 is made of, for example, a metal such as brass or stainless steel, is disposed to face the fluid inlet hole 61A in the main valve chamber S2, and is fixed to the cylindrical portion 611 by brazing, welding, or the like. The valve seat surface 621 is provided to face the fluid inlet hole 61A, and an E port 62A, an S port 62B, and a C port 62C as valve ports are formed in order from the left in FIG. Each of the ports 62A to 62C is formed in a circular shape in plan view and has the same shape. Further, the valve seat surface 621 has a smooth surface so that the valve body 63 can easily slide. Moreover, since the surface of the valve seat surface 621 is formed smoothly, the valve body 63 is hardly damaged.

  The valve body 63 is made of a synthetic resin such as PA (polyamide) or PPS (polyphenylene sulfide) resin, for example, and as shown in FIGS. 2 and 3, a main body 630 formed in a substantially semi-ellipsoidal shape is provided. A sliding contact surface 631 is formed on the lower surface of the main body portion 630 so as to overlap the valve seat surface 621. A communication space S <b> 5 that connects two of the valve ports 62 </ b> A to 62 </ b> C is formed inside the main body 630.

  The sliding contact surface 631 is formed with a plurality of recesses 632 that form a closed space between the valve seat surface 621 and an opening 633 of the communication space S5. As will be described later, since a high-pressure fluid passes through the main valve chamber S2 and a low-pressure fluid passes through the communication space S5, the sliding contact surface 631 of the main body portion 630 changes from the valve seat surface 621 due to a pressure difference. It can be pressed.

  The pair of piston portions 64 and 65 are mainly made of a fluororesin such as PTFE (polytetrafluoroethylene), for example, and are connected to each other by a connecting member 66. Further, the pair of piston portions 64 and 65 are disposed to face each other in the left-right direction (sliding direction) in FIG. 1 and are movably provided in this direction. The pair of piston portions 64 and 65 are disposed in the valve housing 61, so that the valve chamber S1 is located between the main valve chamber S2 between the pair of piston portions 64 and 65 and the cap portions 612A and 612B. Are divided into sub valve chambers S3 and S4.

  The D joint pipe 81, the E joint pipe 82, the S joint pipe 83, and the C joint pipe 84 are pipes made of copper or the like through which fluid flows. The D joint pipe 81 is attached to the fluid inlet hole 61A so as to communicate with the main valve chamber S2. Each of the E joint pipe 82, the S joint pipe 83, and the C joint pipe 84 passes through the cylindrical portion 611 so as to communicate with the E port 62A, the S port 62B, and the C port 62C. It is attached.

  Next, the operation mechanism of the valve device 6 will be described. Here, the pilot valve 7 is connected to a D joint pipe 81 through which a high-pressure fluid flows and an S joint pipe 83 through which a low-pressure fluid flows, as will be described later. The connection with the conduits 613A and 613B can be switched. For example, when the valve body 63 is operated to the left in FIG. 1 (cooling operation), the energization to the coil of the pilot valve 7 is stopped, the D joint pipe 81 and the right pipe 613B are connected, and the S joint pipe 83 and the left conduit 613A are connected. As a result, the right side sub-valve chamber S4 has a higher pressure than the left side sub-valve chamber S3, and the pair of pistons 64 and 65 move to the left side, and the valve body 63 also moves to the left side. At this time, the valve body 63 communicates the E port 62A and the S port 62B through the communication space S5, and exposes the C port 62C to the main valve chamber S2. That is, the valve body 63 closes the E port 62A and the S port 62B and opens the C port 62C with respect to the main valve chamber S2.

  When the valve body 63 is operated to the right side (at the time of heating operation), the coil of the pilot valve 7 is energized to connect the D joint pipe 81 and the left conduit 613A, and the S joint pipe 83 and the right conduit 613B. , The left sub-valve chamber S3 becomes higher in pressure than the right sub-valve chamber S4, and the pair of pistons 64 and 65 and the valve body 63 move to the right. At this time, the valve body 63 communicates the C port 62C and the S port 62B through the communication space S5, and exposes the E port 62A to the main valve chamber S2. That is, the valve body 63 closes the C port 62C and the S port 62B and opens the E port 62A with respect to the main valve chamber S2. The pilot valve 7 may be configured to energize the coil during the cooling operation and stop energizing the coil during the heating operation.

  Next, the detail of the some recessed part 632 formed in the sliding contact surface 631 is demonstrated with reference to FIGS. The plurality of recesses 632 are formed on the entire sliding contact surface 631 so as to surround the opening 633. Each recess 632 is formed in a circular shape in plan view and has a diameter of, for example, about 0.5 mm to 2 mm. In addition, the recessed part 632 does not need to be circular, and when it is formed in other shapes, it should just be set so that a planar view area may become comparable as said circular recessed part 632. In addition, the recess 632 is formed in, for example, about 10% to 40% of the area of the entire sliding contact surface 631, and the surface pressure with respect to the valve seat surface 621 is increased as compared with the configuration in which the recess is not formed. Moreover, the cross section of the recessed part 632 is formed in semi-ellipse shape, and the depth is formed in about 0.3 mm-2 mm, for example. The concave portion 632 may be formed by providing a pin on the mold when the main body portion 630 is injection-molded, or may be cut after the main body portion 630 is molded, or may be melted by pressing a high-temperature pin. May be formed.

  The plurality of recesses 632 are juxtaposed across both ends in a direction (orthogonal direction) orthogonal to the sliding direction shown in FIG. 2 on the sliding contact surface 631, and constitute a plurality of rows along this orthogonal direction. . A slight gap may be formed between the recess 632 formed at the end in the orthogonal direction and the end of the sliding contact surface 631. Such a plurality of recesses 632 are alternately arranged in each row with the recesses 632 in the adjacent row (that is, arranged so as to be adjacent to the gap between the recesses 632 in the other rows in the sliding direction). When viewed from the direction, the recesses 632 are disposed across the both ends in the orthogonal direction without any gaps. That is, the trajectories (indicated by a two-dot chain line in FIG. 5) when the main body portion 630 slides in the sliding direction in the plurality of recesses 632 overlap each other in the orthogonal direction, and the trajectories are orthogonal directions. It is arranged so that there is no gap.

  Hereinafter, the operation of the air conditioner 1 will be described. During the cooling operation, the air conditioner 1 communicates the E port 62A and the S port 62B through the communication space S5 as described above. The high-pressure fluid compressed by the compressor 5 passes through the second flow path portion 20 and the D joint pipe 81, flows into the main valve chamber S2 from the fluid inlet hole 61A, passes through the main valve chamber S2, and passes through the main valve chamber S2. The gas flows out from the port 62 </ b> C and travels toward the C joint pipe 84 and the first flow path portion 10. Furthermore, when this fluid passes through the first flow path portion 10, it dissipates heat in the outdoor heat exchanger 2, is depressurized by the expansion valve 3, and rises in temperature by cooling the room in the indoor heat exchanger 4. The low-pressure fluid that has passed through the first flow path portion 10 flows into the communication space S5 from the E port 62A through the E joint pipe 82, flows out of the S port 62B, and flows out of the S joint pipe 83 and the second flow path section 20. To reach the compressor 5 again and repeat the above cycle.

  Further, during the heating operation, the air conditioner 1 communicates the C port 62C and the S port 62B through the communication space S5 as described above. The high-pressure fluid compressed by the compressor 5 passes through the second flow path portion 20 and the D joint pipe 81, flows into the main valve chamber S2 from the fluid inlet hole 61A, passes through the main valve chamber S2, and passes through E. The gas flows out from the port 62A and travels toward the E joint pipe 82 and the first flow path portion 10. Further, when the fluid passes through the first flow path portion 10, the temperature is lowered by warming the room in the indoor heat exchanger 4, the pressure is lowered by the expansion valve 3, and the heat is absorbed in the outdoor heat exchanger 2. The low-pressure fluid that has passed through the first flow path section 10 flows into the communication space S5 from the C port 62C through the C joint pipe 84, flows out of the S port 62B, and flows out of the S joint pipe 83 and the second flow path section 20. To reach the compressor 5 again and repeat the above cycle.

  As described above, the fluid that passes through each part of the air conditioner 1 contains lubricating oil, and the main body 630 slides in the recess 632 formed on the sliding contact surface 631 of the valve body 63. In the meantime, this oil is taken in. For example, oil adheres to the valve seat surface 621, and the sliding contact surface 631 comes into sliding contact with the valve seat surface 621, so that the oil is taken into the recess 632. At this time, since the recess 632 has the dimensions as described above, oil is taken up so as to fill the entire recess 632.

  According to this embodiment, there are the following effects. That is, since the plurality of recesses 632 provided in the sliding contact surface 631 are arranged in parallel across both ends in the orthogonal direction, one recess is compared with the configuration in which one recess extends in the orthogonal direction. The volume of the closed space formed by 632 is reduced, the closed space can be filled with a small amount of oil, and the sealing performance can be easily imparted to the sliding contact surface 631. Further, even if some of the recesses 632 are not filled with oil, the sealability can be secured by the other recesses 632 filled with oil.

  Furthermore, since the recess 632 forms a relatively small closed space, it is difficult for oil to escape and it is easy to maintain the sealing performance. Furthermore, even if a part of the plurality of recesses 632 is scratched to communicate with the main valve chamber S <b> 2 and the oil is easily removed, the sealing performance can be maintained by the oil taken into the other recesses 632. it can. Moreover, even if the surface pressure of the sliding contact surface 631 with respect to the valve seat surface 621 is increased as described above, an increase in the in-plane dimension of the recess 632 can be suppressed, and a decrease in the oil surface tension in the recess 632 can be suppressed. Thus, the sealing property can be maintained. Further, even when solid impurities are mixed in the fluid and the sliding contact surface 631 and the valve seat surface 621 sandwich the impurities in the vicinity of the recess 632, the sealing performance is maintained by the other recess 632. be able to.

  Further, since the plurality of recesses 632 surround the opening 633, the sealing performance can be improved around the opening 633, and the fluid in the main valve chamber S2 and the fluid in the communication space S5 are mixed. Can be effectively suppressed.

  Further, since the plurality of recesses 632 are arranged so that the trajectory when the main body portion 630 slides is arranged in the orthogonal direction without gaps, this interface when the sliding contact surface 631 is in sliding contact with the valve seat surface 621. Even if the oil is applied without any gap and the fluid tries to pass through the oil-coated region along the sliding direction, the fluid can be blocked by the oil, and the sealing performance can be further improved.

  As described above, the sealing performance between the sliding contact surface 631 and the valve seat surface 621 is improved and the sealing performance is maintained, and mixing of the fluid in the main valve chamber S2 and the fluid in the communication space S5 is suppressed. Therefore, it is possible to suppress a decrease in the operating efficiency of the air conditioner 1.

  Moreover, since the recessed part 632 is formed in the resin-made main-body part 630, and the valve-seat surface 621 of the metal valve seat 62 is formed smoothly, compared with the structure which forms a recessed part in the valve seat 62. Further, it is not necessary to cut the metal member, and the concave portion can be easily formed, and the sliding contact surface 631 can be prevented from being damaged by the valve seat surface 621.

  In addition, this invention is not limited to the said embodiment, Including other structures etc. which can achieve the objective of this invention, the deformation | transformation etc. which are shown below are also contained in this invention.

  For example, in the embodiment, the concave portion 632 having a circular shape in plan view having a diameter of about 0.5 mm to 2 mm is formed on the sliding contact surface 631, but the shape and size of the concave portion and the plan view area are arbitrarily set. For example, a recess 632B having a relatively large diameter may be formed as shown in FIG. 6 (A), or may have a circular shape in plan view with different diameters as shown in FIG. 6 (B). A concave portion 632C may be formed, or a concave portion 632D having a rhombus shape in plan view may be formed as shown in FIG. 6C, or the major axis may be orthogonal to the direction as shown in FIG. A concave portion 632E having a substantially elliptical shape in plan view may be formed, or a concave portion 632F having a long diameter having a substantially elliptical shape in plan view along the sliding direction may be formed as shown in FIG. 6E. If the concave portion 632D is formed in a rhombus shape as shown in FIG. 6C, when the protrusion for forming the concave portion 632D is provided on the mold for injection molding the main body portion 630, the die is cut linearly. By doing so, the protrusion can be easily formed.

  In addition, the cross-sectional shape of the recess is not limited to that shown in the above embodiment, and may have an appropriate shape. For example, a rectangular shape in which corners are formed in an arc shape as shown in FIG. The recess 632G may be a rectangular recess 632H as shown in FIG. 7B, or a trapezoidal recess 632I as shown in FIG. 7C. However, it may be a triangular recess 632J as shown in FIG.

  In the above embodiment, the valve body 63 is slidably moved in a linear sliding direction. However, the valve body may be slidably rotated in a sliding direction about a predetermined axis. As shown in FIG. 8, the main body 670 of the valve body 67 may be configured to slide and rotate about the axis O. In such a valve body 67, an opening 673 and a plurality of recesses 672 are formed on the sliding contact surface 671, and the recess 672 is provided so as to surround the opening 673 of the communication space S5. Further, as shown in an enlarged view in FIG. 8 (B), the plurality of recesses 672 have their trajectories (shown by two-dot chain lines) when the main body portion 670 is slid and rotated in the sliding direction overlapped in the orthogonal direction. The locus is arranged so that there is no gap in the orthogonal direction. According to such a configuration, even if the valve body 67 is slidably rotated, the sealing performance can be improved and the sealing performance can be maintained in substantially the same manner as in the above embodiment.

  In the above embodiment, the trajectory when the main body 630 in the plurality of recesses 632 slides in the sliding direction overlaps each other in the orthogonal direction between adjacent rows (that is, two rows). If the recesses are arranged so that there is no gap in the direction perpendicular to the trajectory, the same effects as in the above embodiment can be obtained. For example, even if a gap is formed in the orthogonal direction when two rows of recesses are overlapped, the gap is eliminated by further overlapping one or more rows of recesses. Alternatively, the concave portions may be randomly arranged without forming a row, and at least a part of the trajectories may be overlapped so that there is no gap in the orthogonal direction.

  Further, if the gaps between the recesses in the orthogonal direction are formed to be sufficiently small, the locus of the recesses may be spaced in the orthogonal direction. For example, as shown in FIG. A plurality of rows may be arranged side by side, and the recesses 632K of each row may be adjacent to each other in the sliding direction.

  In the embodiment, the plurality of recesses 632 are provided so as to surround the opening 633. However, the plurality of recesses may not surround the opening. For example, as illustrated in FIG. 632K may be provided on both sides of the opening 633 in the sliding direction, or the recess may be provided on one side of the opening in the sliding direction.

  Moreover, in the said embodiment, although the several recessed part 632 shall be arranged in parallel so that the row | line | column along an orthogonal direction might be comprised, if a several recessed part spans the both ends of an orthogonal direction (that is, it is). It may be arranged in parallel in any shape between them (for example, it may be arranged in a curved line or in a zigzag shape). The interval between the recesses may not be constant.

  In the above embodiment, the valve device 6 is a four-way valve. However, the valve device has an appropriate number of valve ports and allows the valve ports to communicate with each other or to open and close the valve chamber. Anything to do. Further, the communication space may not be formed in the main body portion, and the opening may not be formed in the sliding contact surface, and the valve body may simply open and close the valve port with respect to the valve chamber.

  In the above embodiment, the valve device 6 is provided in the air conditioner 1 to switch between the cooling operation and the heating operation. However, the valve device is provided in an appropriate device for switching the fluid flow path. That's fine.

  In addition, the best configuration, method and the like for carrying out the present invention have been disclosed in the above description, but the present invention is not limited to this. That is, the invention has been illustrated and described primarily with respect to particular embodiments, but may be configured for the above-described embodiments without departing from the scope and spirit of the invention. Various modifications can be made by those skilled in the art in terms of materials, quantity, and other detailed configurations. Therefore, the description limiting the shape, material, etc. disclosed above is an example for easy understanding of the present invention, and does not limit the present invention. The description by the name of the member which remove | excluded the limitation of one part or all of such is included in this invention.

DESCRIPTION OF SYMBOLS 1 Air conditioner 2 Outdoor heat exchanger 3 Expansion valve 4 Indoor heat exchanger 5 Compressor 6 Valve apparatus 10 1st flow path part 20 2nd flow path part 61 Valve housing 62 Valve seat 62A E port (valve port)
62B S port (valve port)
62C C port (valve port)
63 Valve body 621 Valve seat surface 631 Sliding contact surface 632 Recess 633 Opening S1 Valve chamber S5 Communication space

Claims (6)

It is accommodated in a valve chamber formed in the valve housing and slides and moves in a linear sliding direction on a valve seat surface on which one or more valve ports opened toward the valve chamber are formed. A valve body having a main body for opening and closing at least a part of the valve port with respect to the valve chamber;
A plurality of concave portions that form a closed space between the valve seat surface and the sliding contact surface that overlaps the valve seat surface in the main body portion are provided,
The valve body, wherein the plurality of concave portions are arranged at least across both ends of the sliding contact surface in a direction orthogonal to the sliding direction. A plurality of the valve ports are formed on the valve seat surface,
The main body is configured to simultaneously close at least two of the valve ports with respect to the valve chamber, and is opened toward the valve seat surface at the sliding contact surface so as to communicate with each other. Have a communication space,
The valve body according to claim 1, wherein the plurality of recesses are arranged so as to surround the opening of the communication space. It is accommodated in a valve chamber formed in the valve housing, and slides and rotates in a sliding direction about a predetermined axis on a valve seat surface on which a plurality of valve ports opened toward the valve chamber are formed. A valve body having a main body for opening and closing at least a part of the valve port with respect to the valve chamber,
A plurality of concave portions that form a closed space between the valve seat surface and the sliding contact surface that overlaps the valve seat surface in the main body portion are provided,
The main body is configured to simultaneously close at least two of the valve ports with respect to the valve chamber, and is opened toward the valve seat surface at the sliding contact surface so as to communicate with each other. Have a communication space,
The valve body, wherein the plurality of recesses are arranged so as to surround the opening of the communication space.   The trajectory at the time of sliding of the main body portion in at least a part of the plurality of concave portions is arranged so as to be arranged without a gap in a direction orthogonal to the sliding direction. The valve body according to claim 1. A valve housing forming a valve chamber, a valve seat having a valve seat surface formed with one or a plurality of valve ports opened toward the valve chamber, and being accommodated in the valve chamber and on the valve seat surface A valve device that opens and closes the valve port with respect to the valve chamber by sliding in a predetermined sliding direction,
The said valve body is comprised by the valve body of any one of Claims 1-4, The valve apparatus characterized by the above-mentioned. The 1st flow path part to which the outdoor heat exchanger, the expansion valve, and the indoor heat exchanger were connected in order, the 2nd flow path part to which the compressor was connected, the 1st flow path part, and the 2nd flow path An air conditioner comprising four valve ports respectively connected to both ends of the unit and a valve device for switching a fluid flow direction in the first flow path unit,
The said valve apparatus is comprised with the valve apparatus of Claim 5, The air conditioner characterized by the above-mentioned.

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