JP6239547B2 - Sliding switching valve main body, sliding switching valve, and air conditioner - Google Patents

Description

  The present invention relates to a valve body of a slide type switching valve, and more particularly to a valve body of a sliding type switching valve formed integrally with a valve body and a valve seat in which the slide valve is accommodated, a slide type switching valve, and an air conditioner. Related to the machine.

  As a conventional slide type switching valve, for example, in a heat pump type air conditioner, a refrigerant flow path switching four-way valve (hereinafter simply referred to as “four-way valve”) used for switching between cooling and heating is known. .

  FIG. 1 is a configuration diagram showing an air conditioner 1 that uses a four-way valve 100 as an example of a sliding type switching valve according to the prior art. In FIG. 1, the air conditioner 1 includes a four-way valve 100, a pilot valve 10, an indoor heat exchanger 20, an expansion valve 30, an outdoor heat exchanger 40, and a compressor 50.

  The pilot valve 10 includes an electromagnetic switching unit 11, a high-pressure joint pipe 12 connected to the electromagnetic switching unit 11, a low-pressure joint pipe 14, two switching joint pipes 13 and 15, and an inside of the electromagnetic switching unit 11 (not shown). The electromagnetic coil part 16 which drives a pilot slide valve, and the lead wire 17 which supplies with electricity to the electromagnetic coil part 16 are provided.

  The high pressure joint pipe 12 of the pilot valve 10 is connected to a first joint 111 described later, the low pressure joint pipe 14 is connected to a third joint 113 described later, and the switching joint pipe 13 is a first valve described later. The switching joint pipe 15 is connected to a chamber 121 and is connected to a third valve chamber 123 described later.

  The indoor heat exchanger 20, the expansion valve 30, and the outdoor heat exchanger 40 are connected in this order, the indoor heat exchanger 20 is connected to a second joint 112 described later, and the outdoor heat exchanger 40 is It connects with the 4th coupling 114 mentioned later. The indoor heat exchanger 20 and the outdoor heat exchanger 40 are not in the above-described order, and the inside and the outside may be reversed. The suction port 52 of the compressor 50 is connected to a third joint 113 described later, and the discharge port 51 of the compressor 50 is connected to a first joint 111 described later.

  In FIG. 1, a four-way valve 100 includes a generally cylindrical valve body 101, two pistons 102 and 103, a slide valve 104, a valve seat 108 and four joints 111, 112, 113 and 114. The cylindrical valve body 101 has a central axis OO in the longitudinal direction, and both ends thereof are closed by lids 106 and 107, and two pistons 102 and 103, a slide valve 104, and A valve seat 108 is accommodated. The two pistons 102 and 103 are arranged concentrically with the cylindrical valve main body 101 and are integrally connected by a connecting body 105 that houses a slide valve 104, and the internal space of the cylindrical valve main body 101 is divided into three valves. It is divided into chambers 121, 122 and 123.

  Here, the first valve chamber 121 and the third valve chamber 123 are connected to the switching joint pipe 13 and the switching joint pipe 15, respectively, and one of the valve chambers serves as a suction pipe via the pilot valve 10. The third joint 113 is configured to communicate with the third joint 113. The second valve chamber 122 is connected to a first joint 111 serving as a discharge pipe.

  The two pistons 102 and 103 and the slide valve 104 are configured to move integrally in the left-right direction. The slide valve 104 includes a flow path 124 that opens downward, and moves on the flat surface 108a of the valve seat 108 in the left-right direction. The valve seat 108 is provided with three openings 126, 127, and 128, which are connected to the second, third, and fourth joints 112, 113, and 114, respectively. Therefore, the flow path 124 of the slide valve 104 is formed so that two of the three openings 126, 127, and 128 of the valve seat 108 can communicate with each other. The flow path 124 of the slide valve 104 moves left and right to connect the openings 126 and 127 or the openings 127 and 128, thereby switching the refrigerant flow path. For example, as shown in FIG. 1, when the openings 126 and 127 communicate with each other via the flow path 124 of the slide valve 104, the remaining openings 128 that are not communicated communicate with the second valve chamber 122.

  Of the four joints, the first joint 111 is called a D joint and is a joint as a discharge pipe connected to the discharge port 51 of the compressor 50, and is provided at a position facing the valve seat 108. It is connected to an opening 125 called a D port (main valve high pressure port) and communicates with the second valve chamber 122. The third joint 113 is called an S joint and is a joint as a suction pipe connected to the suction port 52 of the compressor 50, and an S port (main valve low pressure port) provided in the middle of the valve seat 108. It is connected to the opening 127 called. The second joint 112 and the fourth joint 114 are called an E joint and a C joint, and are joints as connection pipes that are connected to each other via the indoor heat exchanger 20, the expansion valve 30, and the outdoor heat exchanger 40. In addition, they are connected to an opening 126 and an opening 128 called an E port and a C port (main valve switching port) provided on the left and right sides of the valve seat 108, respectively.

  The pilot valve 10 is driven by energizing the electromagnetic coil section 16 from the lead wire 17 or by cutting off the energization. As a result, the high-pressure refrigerant is supplied from the high-pressure joint pipe 12 of the pilot valve 10 to the first valve chamber 121 or the third valve chamber 123 through the switching joint pipe 13 or 15, and the switching of the four-way valve 100 is controlled. When the first valve chamber 121 is in communication with the third joint 113 on the low pressure side, the four-way valve 100 is connected to the compressor 50 → the outdoor heat exchanger 40 → the expansion valve 30 → the indoor heat exchanger 20 → the compressor. A flow path for cooling operation of 50 is formed. On the other hand, when the third valve chamber 123 communicates with the third joint 113 on the low pressure side, the four-way valve 100 includes the compressor 50 → the indoor heat exchanger 20 → the expansion valve 30 → the outdoor heat exchanger 40. → A flow path for heating operation as the compressor 50 is formed.

JP 54-43324 A Specification of China published No. 201391635

  In the four-way valve 100 according to the prior art, in order to connect the valve body 101, the valve seat 108, and the four joints 111, 112, 113, and 114, for example, a brazing jig as shown in FIG. 200 is used. The brazing jig 200 includes a horizontal base 201, a support column 202 that extends vertically on the base 201, an upper arm 203 that is parallel to the base 201 and extends horizontally, and supports three pressing bars vertically, and the base 201. The valve seat receiver 204 and the joint pipe receiver 205 extend in parallel with each other and horizontally.

  As shown in FIG. 2, each member of the four-way valve 100 is temporarily assembled in a brazing jig 200 and then brazed. Specifically, the temporary assembly of each member is a valve in which the valve seat 108 is mounted on the valve seat receiver 204 and the valve body 101 is mounted on the valve body 101 in a state where the valve seat is reversed 180 degrees up and down from the state shown in FIG. Insert into seat 204. Next, one end of the first joint 111 is fitted into the joint pipe receiver 205, and the other end of the first joint 111 is fitted into the opening 125 of the valve body 101 to assemble the first joint 111. Subsequently, one end of each of the second, third, and fourth joints 112, 113, and 114 is fitted into the corresponding opening 126, 127, 128 provided in the valve seat 108, and the presser corresponding to the other end The temporary assembly to the brazing jig 200 is completed by inserting the bars 206, 207, and 208. Thereafter, brazing is performed.

  As described above, in the conventional four-way valve 100, the cylindrical valve body 101, the valve seat 108 and the four joints 111 to 114 formed separately are brazed at the same time. Therefore, since the joining area becomes large, brazing is difficult. Further, since the cylindrical valve body 101 and the valve seat 108 are separate bodies, three insertion holes provided in the cylindrical valve body 101 into which the three joints 112 to 114 are fitted, and the insertion holes, respectively. Correspondingly, each of the openings 126, 127 and 128 formed in the valve seat 108 is required to be processed with accuracy. Furthermore, since the cylindrical valve body 101 and the valve seat 108 are separate, it takes time to align the insertion holes of the cylindrical valve body 101 and the corresponding openings 126 to 128 of the valve seat 108 during brazing. Cost. Therefore, the brazing jig 200 has a complicated structure in order to facilitate alignment and hold the valve seat 108 which is a separate part. As a result, the heat capacity of the jig is increased, and a large amount of heat is taken by the jig, so that not only the temporary assembly takes time but also the brazing time becomes long. In particular, the valve seat 108 not only has a large volume but also is in direct contact with the valve seat receiver 204, so that the temperature is difficult to rise. On the other hand, since the joint is a thin copper pipe and the temperature is likely to rise, the brazing material is pulled to the joint side and is difficult to reach the joint of the valve seat 108. As a result, there has been a problem that airtightness cannot be maintained due to a gap formed at the joint of the valve seat 108 or a hole being opened. Further, even if the brazing material has sufficiently spread to the valve main body joint portion, since the valve main body 101 and the valve seat 108 are separate, there has been a problem that the brazing material flows to the piston sliding portion. Further, when a tubular joint is brazed to the cylindrical valve body 101, the brazing material easily flows to the side surface of the main body (brazing), and there is a possibility that the brazing material is insufficient at the joint portion or the brazing material is wasted.

  As means for solving this problem, there has been a method in which the valve body and the valve seat are integrally formed by press working, as shown in Patent Documents 1 and 2. However, the conventional techniques as shown in Patent Documents 1 and 2 have the following problems because the valve seat is formed by pressing a thin pipe that is a valve body.

  First, in the invention shown in Patent Document 1, since a valve body having a thin pipe shape is processed to form a valve seat, there is a problem in that the brazing allowance of the joint can ensure only about the plate thickness of the pipe. . It is conceivable to deal with this problem by raising a brazing part by burring or the like as in the invention shown in Patent Document 2. However, when burring, it is difficult to process because an arrow does not enter unless there is a hole facing the burring hole. Even if it can be processed, it is necessary to separate the adjacent valve ports, leading to an increase in the size of the main body. Furthermore, in burring, it is difficult to provide a step, and it is difficult to determine the joint insertion depth at a fixed position.

  Further, in the inventions shown in Patent Documents 1 and 2, since the valve seat is formed on the thin pipe that is the valve body, the adjacent piston sliding surface is easily distorted and it is difficult to maintain a perfect circle, which may cause malfunction. There is.

  Further, as shown in FIG. 3, when the valve body and the valve seat are formed by press working, two crimping jigs 302 are used on both sides of the valve body 301 in the lid crimping process performed at the time of manufacture. When the lids 106 and 107 are caulked, the valve body 301 is a thin pipe, so that the strength is insufficient, and the sealing surface 301a of the valve seat shown by the dotted line portion 303 in FIG. 3 may be distorted. As a result, there is a problem that sealing cannot be performed between the slide valve 104 and the valve seat, and high-temperature refrigerant leaks to the low-temperature refrigerant side, resulting in poor operation and system efficiency.

  Further, as shown in FIG. 4, when the valve body and the valve seat are formed by pressing, the joint is directly brazed to the thin valve seat portion. , 402, 403, for example, when an external force is applied to each of the system piping 401, 402, 403 in the direction indicated by the arrow in FIG. 4, the seal surface of the valve seat shown in the dotted line portion 404 in FIG. 301a may be distorted, and there are the same problems as described above.

  Accordingly, an object of the present invention is to eliminate the problem of brazing and solve the problem due to insufficient strength of the valve body by press working of the prior art, the valve body of the slide type switching valve, the sliding type switching valve, and the air It is to provide a harmony machine.

In order to solve the above problems, a valve body of a slide type switching valve according to the present invention has a substantially cylindrical shape, a valve seat to which at least one joint is connected, and a joint different from the at least one joint. And a protrusion connected directly to a position different from the valve seat of the valve body, the valve seat having a flat surface inside the valve body, and the valve body includes the valve seat. A heat transfer part formed by the cylindrical shape of the portion of the valve body in contact with the cylindrical inner peripheral surface of the valve body being recessed inward, the valve body; and The valve seat is integrally formed by forging.

  The valve body may be provided with a beam around a portion of the cylindrical outer peripheral portion to which the at least one joint is connected.

  The valve body may be provided with an opening at a portion where the at least one joint and the another joint are connected, and a step is formed inside the opening.

  The valve main body may further include another protrusion to which the pilot valve is connected at a position different from the protrusion.

  In order to solve the above problems, the forged product of the valve body of the slide type switching valve of the present invention forms the valve body of the sliding type switching valve, and the forged product has a substantially cylindrical shape, and the cylindrical shape A thick wall portion corresponding to the valve seat, a partition wall that divides the cylindrical internal space, and at least one protrusion at a position other than the thick wall portion of the cylindrical outer peripheral portion. It is characterized by that.

In order to solve the above-mentioned problem, the slide type switching valve according to the present invention moves on the flat surface inside the valve body of the valve body and the valve body of the valve seat and is connected to the valve body directly. And a slide valve for communicating the joint with the at least one joint coupled via the valve seat.

  In order to solve the above-described problems, an air conditioner according to the present invention uses the above-mentioned slide type switching valve.

  According to the valve main body, the slide type switching valve, and the air conditioner of the present invention, the problem of brazing can be eliminated by integrally forming the valve main body and the valve seat by forging. Since a part and a hollow part can be formed, the lack of strength which is a concern in the prior art can be resolved.

  In addition, according to the slide type switching valve of the present invention, the valve body and the valve seat are integrally formed by forging, thereby reducing the volume of the heat transfer section and suppressing heat loss. Efficiency can be improved.

It is a block diagram which shows the air conditioner which uses the pilot-type four-way valve for refrigerant | coolant flow path switching as an example of the slide type switching valve by a prior art. It is a figure which shows the state temporarily assembled to the brazing jig | tool in order to braze the valve main body of the slide type switching valve by a prior art, a valve seat, and a coupling. It is a figure which shows the lid crimping process of the four-way valve formed by the press work by a prior art. It is a figure which shows the state which connected the four-way valve formed by the press work by a prior art, and system piping and applied external force. It is a figure which shows the forged product for forming the valve main body of the four-way valve which is a slide type switching valve of the 1st Embodiment of this invention, Fig.5 (a) is sectional drawing, FIG.5 (b) These are VB-VB sectional views shown in Drawing 5 (a), and Drawing 5 (c) is an enlarged view of the VC section shown in Drawing 5 (b). It is a block diagram of the metal mold | die for forming the forged product of the valve main body shown in FIG. It is a figure which shows the valve main body of the slide type switching valve of the 1st Embodiment of this invention formed by processing the forged goods of the valve main body shown in FIG. 5, (a) is a partial cross section of a valve main body. 7 (b) is a sectional view taken along the line VIIB-VIIB shown in FIG. 7 (a), and FIG. 7 (c) is a bottom view of the valve body shown in FIG. 7 (a). (D) is a bottom view showing an example of a valve body different from FIG. 7 (c). It is a figure explaining the effect of the present invention, it is a figure showing the structure of a four-way valve according to the prior art, FIG. 8 (a) is a sectional view of the four-way valve according to the prior art, FIG. 8 (b), It is VIIIB-VIIIB sectional drawing shown to Fig.8 (a), FIG.8 (c) is an enlarged view of the VIIIC part shown to FIG.8 (b). It is a figure explaining the effect of this invention, Comprising: It is a figure which shows the structure of the four-way valve which is a slide type switching valve of the 1st Embodiment of this invention, Fig.9 (a) is the 1st of this invention It is sectional drawing of the four-way valve which is a slide type switching valve of embodiment, FIG.9 (b) is IXB-IXB sectional drawing shown to Fig.9 (a), FIG.9 (c) is FIG.9 (b). It is an enlarged view of the IXC portion shown in FIG. It is a figure which shows the forged product of the valve main body used for the four-way valve which attached the pilot valve which is the slide type switching valve of the 2nd Embodiment of this invention directly to the valve main body, and Fig.10 (a) is a front view. FIG. 10B is a right side view. It is a figure which shows the four-way valve which attached the pilot valve which is a slide type switching valve of the 2nd Embodiment of this invention directly to the valve main body, Fig.11 (a) is a front view, FIG.11 (b) is FIG. FIG. It is an enlarged view which shows the connection part of the valve main body and pilot valve of the four-way valve shown in FIG. FIG. 13 (a) is a partial cross-sectional view illustrating a connection portion between a valve body and an electromagnetic switching portion formed by press processing according to the prior art. ) Is a partial cross-sectional view showing a connection portion between a valve main body and an electromagnetic switching portion formed by forging a sliding switching valve according to a second embodiment of the present invention.

  Embodiments of the present invention will be described below with reference to the drawings.

  First, the first embodiment will be described.

  Note that the concept of the vertical and horizontal directions in the following description corresponds to the vertical and horizontal directions in the accompanying drawings, and indicates the relative positional relationship of each member, and does not indicate the absolute positional relationship. .

  FIG. 5 is a view showing a forged product 500 for forming a valve body of a four-way valve that is a sliding type switching valve according to the first embodiment of the present invention, and FIG. 5 (a) is a sectional view. 5B is a VB-VB cross-sectional view shown in FIG. 5A, FIG. 5C is an enlarged view of the VC portion shown in FIG. 5B, and FIG. It is a block diagram of the metal mold | die for forming the forged product 500 of the valve main body shown in FIG.

  In FIG. 5, the valve body forged product 500 can form the thick part 500a and the hollow part 500d, so that the strength of the slide type switching valve using the valve body formed by press working according to the prior art is insufficient. Can be eliminated.

  A forged product 500 of the valve body shown in FIG. 5A has a substantially cylindrical shape, and a thick portion 500a corresponding to a valve seat 700a described later is formed in a central lower portion inside the cylinder. Moreover, the partition wall 500b is formed in the edge part of the thick part 500a inside a cylinder.

  For example, as shown in FIG. 6, the forged product 500 of the valve body includes a pair of first forging dies 601 that form a cylindrical outer shape and a pair of cylindrical inner shapes that are formed from the left and right. The second forging die 602 is formed. The first forging die 601 may be divided vertically as shown in FIG. 6 or may be divided in other directions. In addition, since the second forging die 602 having a cylindrical internal shape is driven from the left and right, a partition wall 500b extending perpendicularly to the axial direction is formed inside the cylinder. The position of the partition wall 500b is not limited to the end of the thick part 500a as described above. Further, the partition wall is not vertical, but may extend in an oblique direction, as long as the internal space can be divided.

  As shown in FIG. 5 (a), at a position facing the thick portion 500a of the forged product 500 of the valve body and slightly on the left side of the center shown in FIG. A columnar projection 500c is provided in which an opening 701 to which is connected is provided. As will be described later, by providing the protrusion 500c, a step is provided in the opening to which the D joint 811 is connected, and the strength of the connection portion is maintained. Here, the protruding portion 500c is provided opposite to the thick portion 500a and provided at the center and slightly on the left side, but is not limited thereto. Further, as shown in FIG. 5C, the forged product 500 of the valve body includes a cylindrical inner peripheral side of a portion where the flat inner surface of the thick part 500a is in contact with the cylindrical inner peripheral surface. Alternatively, a recessed portion 500d formed by recessing at least one of the outer peripheral side inward is provided. As will be described later, by providing the recessed portion 500d, the volume of the heat transfer section β can be reduced, and heat loss can be suppressed.

  FIG. 7 is a view showing a valve body 700 of the sliding switching valve according to the first embodiment of the present invention formed by processing the forged product 500 of the valve body shown in FIG. 7B is a partial cross-sectional view of the valve body 700, FIG. 7B is a cross-sectional view of VIIB-VIIB shown in FIG. 7A, and FIG. 7C is a valve main body 700 shown in FIG. 7A. FIG. 7D is a bottom view showing a valve main body 710 different from FIG. 7C.

  7 (a), 7 (b), and 7 (c), the valve body 700 of the slide type switching valve of the present invention is formed by cutting the valve body forged product 500 shown in FIG. It is formed by providing openings 701, 702, 703, and 704 in the portion 500c and the thick portion 500a. Here, the valve body 700 is formed by cutting, but may be formed by other processing methods.

  The valve body 700 is provided with a valve seat 700a. In the valve seat 700a, openings 702, 703, and 704 to which ESC joints 812, 813, and 814, which will be described later, are connected are formed. Each of the openings 702, 703, and 704 is provided with steps 702a, 703a, and 704a used for positioning the joint by cutting. Thus, by forming the steps 702a, 703a, and 704a by cutting, the insertion depth of the joint can be easily determined, the brazing allowance can be secured, and stable brazing can be performed.

  A joint coupling portion 700c formed by machining a cylindrical projection 500c is provided at a position facing the valve seat 700a of the valve body 700. An opening 701 to which a D joint 811 described later is connected is formed in the joint connecting portion 700c. The opening 701 is provided with a step 701a used for positioning the joint by cutting, and the same effect as the steps 702a to 704a can be obtained.

  At a position corresponding to the recessed portion 500d of the valve body 700, the cylindrical shape of the portion where the flat surface 700b inside the valve body of the valve seat 700a contacts the cylindrical inner peripheral surface of the valve body 700 is recessed inward. The formed hollow portion 700d is provided, whereby the volume of the heat transfer portion β can be reduced, and heat loss can be suppressed.

  Further, as shown in FIG. 7C, a beam 700e having a straight end surface is formed around the openings 702, 703, and 704 on the cylindrical outer peripheral portion of the valve body 700 where the valve seat 700a is formed. Provided. Here, the beam 700e is formed by forging, but may be formed by cutting a forged product of a cylindrical valve body. By providing the beam 700e on the valve body 700, it is possible to ensure strength against the external force of the valve body 700, for example, preventing the valve seat portion from being distorted during the lid caulking process.

  7D, unlike the shape of the beam 700e of the valve body 700 shown in FIG. 7C, the curved beam 710e has end faces that match the openings 712, 713, and 714. It may be provided. Even with such a shape, for example, the strength against the external force of the valve body 710 can be ensured, for example, the valve seat portion can be prevented from being distorted during the lid crimping process.

  FIG. 8 is a diagram illustrating the effect of the present invention, and is a diagram showing the structure of a four-way valve 800 according to the prior art. FIG. 8A is a cross-sectional view of the four-way valve 800 according to the prior art. 8 (b) is a cross-sectional view taken along the line VIIIB-VIIIB shown in FIG. 8 (a), and FIG. 8 (c) is an enlarged view of the VIIIC portion shown in FIG. 8 (b).

  8A, a four-way valve 800 according to the prior art includes a cylindrical valve body 801, a first valve chamber 821, a second valve chamber 822, and three valve chambers 801, Two pistons 802 and 803 that are divided into three valve chambers 823, a slide valve 804 having a flow path 824 that opens downward, and a coupling body that integrally connects the two pistons 802 and 803 and the slide valve 804 805, lids 806 and 807 that close both ends of the valve body 801, a valve seat 808 having a flat surface 808a inside the valve body, and four joints 811 (D joint), 812, 813, and 814 (ESC joint) With. The detailed description is the same as that of the four-way valve 100 shown in FIG.

  As shown in FIG. 8A, the slide valve 804 is moved to the right side of the flat surface 808a of the valve seat 808, and the high-temperature refrigerant is dark hatched in FIGS. 8A and 8B. As shown, the first joint (D joint) 811, the first valve chamber 821, the second valve chamber 822, and the second joint (E joint) 812 are satisfied. On the other hand, as shown in the thin hatching in FIGS. 8A and 8B, the low-temperature refrigerant is composed of a third joint (S joint) 813, a flow path 824, a fourth joint (C joint) 814, In addition, the third valve chamber 823 is filled.

  In the conventional four-way valve 800, the valve main body 801 and the valve seat 808 are connected by brazing. Therefore, as shown in FIGS. 8A and 8C, the valve main body 801 and the valve seat 808 are connected. The volume of the heat transfer part α that is transmitted to is increased. Therefore, a large amount of heat is absorbed by the heat transfer section α of the high-temperature refrigerant discharged from the compressor 50, and the heat escapes to the low-temperature refrigerant side, resulting in a loss of system efficiency.

  FIG. 9 is a diagram for explaining the effect of the present invention, and is a diagram showing the structure of a four-way valve 900 that is a slide type switching valve according to the first embodiment of the present invention. FIG. FIG. 9B is a cross-sectional view of the four-way valve 900 that is the sliding switching valve of the first embodiment of the invention, and FIG. 9B is a cross-sectional view taken along the line IXB-IXB shown in FIG. FIG. 10 is an enlarged view of the IXC portion shown in FIG.

  The four-way valve 900 shown in FIG. 9 uses the valve body 700 or 710 formed by forging shown in FIG. 7 as the valve body, and other configurations are the same as those of the conventional four-way valve 800 shown in FIG. Same as the configuration. Similar components are denoted by the same reference numerals, and description thereof is omitted here. Here, description will be made assuming that the valve body 700 is used.

  As shown in FIG. 9A, as in FIG. 8, the slide valve 804 is moved to the right side of the flat surface 700b of the valve seat 700a, and the high-temperature refrigerant is shown in FIGS. (B) As shown in the dark hatching, the first joint (D joint) 811, the first valve chamber 821, the second valve chamber 822, and the second joint (E joint) 812 are satisfied. It has become. On the other hand, as shown in the thin hatching in FIG. 9A and FIG. 9B, the low-temperature refrigerant is a third joint (S joint) 813, a flow path 824, a fourth joint (C joint) 814, In addition, the third valve chamber 823 is filled.

  The four-way valve 900 as a slide type switching valve according to the present invention uses the valve body 700 shown in FIG. 7, and the valve body 700 and the valve seat 700a are integrally formed by forging, so that FIG. Unlike the prior art valve main body shown in FIG. 9A, a hollow portion 700d can be formed, and a heat transfer portion β having a small volume as shown in FIGS. 9A and 9C can be formed. Thereby, it can suppress that the heat | fever of the high temperature refrigerant | coolant discharged from the compressor 50 which was a problem in the prior art escapes from the heat delivery part (beta) to the low temperature side, and can reduce the loss of system efficiency. In the structure in which the valve main body 801 and the valve seat 808 are separately formed and connected by brazing as shown in FIG. 8, it is difficult to reduce the volume of the heat transfer section α.

  Next, a second embodiment will be described.

  FIG. 10 is a view showing a forged product 1000 of a valve body used in a four-way valve in which a pilot valve which is a sliding type switching valve according to a second embodiment of the present invention is directly attached to the valve body, and FIG. FIG. 10B is a right side view.

  10A and 10B, a forged product 1000 of the valve body for forming the valve body 1120 later by cutting or the like is formed by forging. In the forged product 1000, a thick portion 1000a corresponding to a valve seat (not shown) and a thick portion 1000a inside the cylinder are provided at the lower center of the inside of the cylinder as in the forged product 500 of the valve body shown in FIG. A partition wall 1000b formed at the end of the cylindrical portion, a cylindrical protrusion 1000c corresponding to a joint connecting portion 1120c to which the D joint 811 is connected, and a hollow portion 1000d, and a beam 1000e. Provided. Further, the forged product 1000 is provided with a cylindrical protrusion 1000f corresponding to a pilot valve connecting portion 1120f to which a pilot valve 1110 described later is connected from the front center right of the forged product 1000. Note that the protrusion 1000f corresponding to the pilot valve connection portion 1120f needs to be connected to the second valve chamber 822 inside the valve body 1120, as will be described later. Thus, it can be provided anywhere as long as it is in a position different from the protrusion 1000c corresponding to the joint connecting portion 1120c.

  Since the forged product 1000 of the valve body is formed by forging, it is possible to provide a projection partly, and the projection part 1000f corresponding to the pilot valve connection part 1120f, which is a connection point of the pilot valve 1110, is provided on the valve body. Can be easily installed. Even in the case of press working, it is possible to provide the protrusions by raising the burring, but it is difficult to secure the brazing allowance because the rising part of the burring cannot be provided long. In addition, it is difficult to provide a step and it is difficult to determine the insertion depth of the joint. Furthermore, since the dimensional accuracy is difficult to obtain, the clearance is not stable. As a result, there is a problem that brazing tends to become unstable. Further, when performing burring, there is a restriction on the position that machining is difficult because an arrow does not enter unless there is a hole facing the burring hole. For example, the protrusion 1000f of the forged product 1000 of the valve body shown in FIG. There is a problem that it is difficult to burring at such an optimal position.

  FIG. 11 is a view showing a four-way valve 1100 in which a pilot valve, which is a slide type switching valve according to a second embodiment of the present invention, is directly attached to a valve body, and FIG. 11 (a) is a front view. 11 (b) is a right side view, and FIG. 12 is an enlarged view showing a connection portion between the valve main body 1120 and the pilot valve 1110 of the four-way valve 1100 shown in FIG.

  11 (a) and 11 (b), the four-way valve 1100 uses a valve body 1120 obtained by processing the forged product 1000 of the valve body shown in FIG. 10, and further, the pilot valve connection portion 1120f of the valve body 1120 Except that the electromagnetic switching portion 1111 of the cylindrical pilot valve 1110 is attached to the opening 1125, the configuration is the same as that of the four-way valve 900 that is the sliding type switching valve of the first embodiment of the present invention shown in FIG. Similar components are denoted by the same reference numerals and description thereof is omitted.

  The valve body 1120 is formed by performing cutting or the like on the forged product 1000 of the valve body, as in the first embodiment. The valve main body 1120 has the same shape as the valve main body 700 shown in FIG. 7 except that a pilot valve connecting portion 1120f in which an opening 1125 to which the pilot valve 1110 is connected is formed is formed. Detailed description of the same configuration is omitted.

  An electromagnetic coil unit 1116 shown in FIG. 12 is attached to the electromagnetic switching unit 1111 and functions as the pilot valve 1110 in the same manner as the pilot valve 10 shown in FIG. For this reason, the electromagnetic switching unit 1111 includes a plunger, an attractor, a pilot valve body, and the like (not shown). As shown in FIG. 12, the electromagnetic switching portion 1111 is connected to an opening 1125 of a pilot valve connection portion 1120f provided in the valve body 1120 by brazing or welding. Similarly to the pilot valve 10, a low-pressure joint pipe 1114 and two switching joint pipes 1113 and 1115 are connected to the electromagnetic switching unit 1111. 1 is connected to the valve chamber 822 through a hole 1125a located in the center of the opening 1125 of the valve main body 1120 in the portion corresponding to the high-pressure joint pipe 12 in FIG. Is substituted by The hole diameter of the hole 1125a is not less than the inner diameter of the high-pressure joint pipe 12. The low pressure joint pipe 1114 is connected to the third joint 813, the switching joint pipe 1113 is connected to the first valve chamber 821 via the lid 806, and the switching joint pipe 1115 is connected via the lid 807. , Connected to the third valve chamber 823. The four-way valve 1100 can perform the same function as the four-way valve shown in FIG.

  As shown in the four-way valve 1100, by directly connecting the pilot valve 1110 to the valve main body 1120, a bracket (not shown), a high-pressure joint pipe 12 and the like that have been attached to the valve main body, which have been conventionally required, are provided. There is an effect that it becomes unnecessary and the number of parts can be reduced. In addition, the caulking portion of the bracket is loosened due to vibration, and the holding force of the electromagnetic switching portion 1111 of the pilot valve 1110 is not reduced, and there is an effect that it becomes strong against vibration.

  FIG. 13 is a diagram for explaining the effect of the present invention. FIG. 13A is a partial cross-sectional view showing a connecting portion between the valve main body 1300 and the electromagnetic switching portion 1111 formed by press working of the prior art. FIG. 13B is a partial cross-sectional view showing a connection portion between the valve main body 1120 and the electromagnetic switching portion 1111 formed by forging the sliding type switching valve according to the second embodiment of the present invention.

  Compared to the valve body 1300 formed by the prior art press work shown in FIG. 13A and the valve body 1120 formed by forging, in the case of the press work, it depends on the thickness of the pipe, With burring, the start-up part cannot be long. Further, it is difficult to provide a step, and the insertion depth of the electromagnetic switching unit 1111 cannot be easily determined. Furthermore, since there is a concern about deformation of the valve body itself, breakage or cracking of the brazed portion, it is weak against external force. On the other hand, in the case of forging, it is possible to make the vicinity of the brazed portion have an arbitrary thickness or length, so that it can be strong against external force.

  In addition, although the valve main body of the slide type switching valve of the present invention is formed by forging, it can also be formed by casting or other processing methods.

  Further, the slide type switching valve of the present invention can of course be used in an air conditioner as shown in FIG. 1, and can be applied to a pilot type or a pilot type. In the present embodiment, a four-way valve has been described as an example. However, the present embodiment is also applicable to a slide type switching valve that connects other numbers of joints.

  As described above, according to the slide type switching valve of the present invention, the problem of brazing can be solved by integrally forming the valve body and the valve seat by forging. Furthermore, since the thick part and the dent part can be formed, the lack of strength which is a concern in the prior art can be solved, and the volume of the heat delivery part can be reduced and the heat loss can be suppressed. Efficiency can be improved.

DESCRIPTION OF SYMBOLS 1 Air conditioner 10, 1110 Pilot valve 11, 1111 Electromagnetic switching part 12 High pressure joint pipe 13, 15, 1113, 1115 Switching joint pipe 14, 1114 Low pressure joint pipe 16, 1116 Electromagnetic coil part 17 Lead wire 20 Indoor heat exchanger 30 Expansion valve 40 Outdoor heat exchanger 50 Compressor 51 Discharge port 52 Suction port 100, 800, 900, 1100 Four-way valve 101, 700, 710, 801, 1120, 1300 Valve body 102, 103, 802, 803 Piston 104, 804 Slide Valve 105, 805 Connection body 106, 107, 806, 807 Lid body 108, 700a, 808 Valve seat 108a, 700b Flat surface 111, 811 First joint (D joint)
112, 812 Second joint (E joint)
113, 813 Third joint (S joint)
114, 814 Fourth joint (C joint)
121, 821 First valve chamber 122, 822 Second valve chamber 123, 823 Third valve chamber 124, 824 Flow path 125, 126, 127, 128, 701, 702, 703, 704, 712, 713, 714 1125 Opening 500, 1000 Forged product 500a, 1000a Thick part 500b, 1000b Partition wall 500c, 1000c, 1000f Projection part 500d, 700d, 1000d Recessed part 601 First forging mold 602 Second forging mold 700c, 1120c Joint joint 700e, 710e, 1000e Beam 701a, 702a, 703a, 704a Step 1120f Pilot valve connection 1125a Hole α, β Heat transfer part

Claims (7)

A valve body of a sliding switching valve,
The valve body has a substantially cylindrical shape,
A valve seat to which at least one joint is coupled;
A joint that is different from the at least one joint further includes a protrusion that is directly connected to a position different from the valve seat of the valve body;
The valve seat has a flat surface inside the valve body,
The valve main body has a heat transfer portion formed by indenting the cylindrical shape of a portion where the flat surface inside the valve main body of the valve seat is in contact with the cylindrical inner peripheral surface of the valve main body. Further provided,
The valve body of the slide type switching valve, wherein the valve body and the valve seat are integrally formed by forging. The valve body of the slide type switching valve according to claim 1, wherein the valve body is provided with a beam around a portion of the cylindrical outer peripheral portion to which the at least one joint is connected. . The slide type according to claim 1 or 2 , wherein the valve body is provided with an opening at a portion where the at least one joint and the another joint are connected, and a step is formed inside the opening. Valve body of switching valve. The slide type switching according to any one of claims 1 to 3 , wherein the valve main body further includes another projecting portion connected to a pilot valve at a position different from the projecting portion. The valve body of the valve. A forged product for forming the valve main body of the slide type switching valve according to any one of claims 1 to 4 ,
The forged product has a substantially cylindrical shape,
A thick part corresponding to the valve seat in a part of the cylindrical shape,
A partition wall that divides the cylindrical internal space;
A forged product of a valve body of a slide type switching valve, comprising at least one protrusion at a position other than the thick portion of the cylindrical outer peripheral portion. The valve body according to any one of claims 1 to 4 ,
A slide valve that moves on a flat surface inside the valve body of the valve seat and communicates the another joint directly connected to the valve body and the at least one joint connected via the valve seat. And a sliding type switching valve. An air conditioner using the sliding switching valve according to claim 6 .

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