CN109578617A

CN109578617A - Flow channel switching valve

Info

Publication number: CN109578617A
Application number: CN201810876162.XA
Authority: CN
Inventors: 田渕健资
Original assignee: Fujikoki Corp
Current assignee: Fujikoki Corp
Priority date: 2017-09-29
Filing date: 2018-08-03
Publication date: 2019-04-05
Anticipated expiration: 2038-08-03
Also published as: CN109578617B; JP2019065896A; JP6596052B2

Abstract

The present invention provides a kind of flow channel switching valve that can be difficult to leak valve and can effectively inhibit the pressure loss.Union body 25 is by having one or more pieces plates of a pair of of supporting board (25a) to constitute, a pair of supporting board is parallel with the valve seat of main valve seat (the first main valve seat (13) and the second main valve seat (14)) and separates and configures on the direction (short transverse of valve seat) orthogonal with the valve seat of the main valve seat (the first main valve seat (13) and the second main valve seat (14)), a pair of first and second sliding valve core (15A, 15B) respectively with piston (21, 22) round-trip and the mode of movement link respectively, it is fitted into or is sticked in a pair of supporting board (25a).

Description

Flow channel switching valve

Technical field

The present invention relates to the flow channel switching valves for the switching that flow path is carried out by keeping spool mobile, such as are related to being suitable for heat The flow channel switching valve of flow path switching is carried out in pump type refrigerating and heating systems etc..

Background technique

Generally, the heat pump type refrigerating heating system of room air conditioner, air conditioning for automobiles etc. have compressor, outdoor heat exchanger, Other than indoor heat exchanger and expansion valve etc., it is also equipped with the flow channel switching valve as flow path (flow direction) switch means.

As this flow channel switching valve, there is known four-way switching valves, but can replace, and consider to use six direction changeover valves.

Hereinafter, briefly describing the one of the heat pump type refrigerating heating system for having six direction changeover valves referring to Fig. 7 (A), (B) Example.The heat pump type refrigerating heating system 100 of illustrated example carries out operation mode (refrigeration operation and heating by six direction changeover valves 180 Operating) switching, substantially have: compressor 110, outdoor heat exchanger 120, indoor heat exchanger 130, cooling expansion valve 150 and heating use expansion valve 160, between them configuration tool there are six port pA, pB, pC, pD, pE, pF six direction changeover valves 180。

By the flow path connection by formation such as conduits (pipe) between each equipment, when selecting cooling operation pattern, such as Shown in Fig. 7 (A), the refrigerant of the high temperature and pressure being discharged from compressor 110 is from the port pA of six direction changeover valves 180 via port pB It is imported into outdoor heat exchanger 120, heat exchange is carried out with outdoor air herein and condenses, become the gas-liquid two-phase or liquid phase of high pressure Refrigerant is imported into cooling expansion valve 150.The refrigerant of high pressure is depressurized by the cooling expansion valve 150, is depressurized The refrigerant of low pressure afterwards imports indoor heat exchanger 130 via port pF from the port pE of six direction changeover valves 180, herein with room Interior air carries out heat exchange (refrigeration) and evaporates, and the refrigerant of the low-temp low-pressure from indoor heat exchanger 130 leads to switching from six The port pC of valve 180 returns to the suction side of compressor 110 via port pD.

In contrast, when selecting heating mode of operation, as shown in Fig. 7 (B), from the high temperature and pressure of the discharge of compressor 110 Refrigerant be imported into indoor heat exchanger 130 via port pF from the port pA of six direction changeover valves 180, herein with room air Carry out heat exchange (heating) and condense, become high pressure gas-liquid two-phase or liquid phase refrigerant and be imported into heating expansion valve 160. It is depressurized by the heating with refrigerant of the expansion valve 160 to high pressure, the refrigerant of the low pressure after decompression is from six direction changeover valves 180 port pC is imported into outdoor heat exchanger 120 via port pB, carries out heat exchange with outdoor air herein and evaporates, and comes It returns and compresses via port pD from the port pE of six direction changeover valves 180 from the refrigerant of the low-temp low-pressure of outdoor heat exchanger 120 The suction side of machine 110.

Enter six direction changeover valves (flow channel switching valve) of heat pump type refrigerating heating system as described above etc. as group, it is known that example The flow channel switching valve of such slidingtype as described in patent document 1.The flow channel switching valve (six direction changeover valves) of the slidingtype has The valve body (main valve shell) of built-in slidingtype main valve plug and the pilot valve (four-way pilot valve) of electromagnetic type, are equipped in main valve shell Port pA~the pF, and slidingtype main valve plug is configured to slide in the lateral direction.In the slidingtype of main valve shell The left and right of main valve plug is set there are two operating chamber, which inhales via pilot valve with compressor discharge side and compressor Enter side connection, and formed respectively by the pair of right and left piston-type gasket zoning for being incorporated into slidingtype main valve plug, by the guide Valve selectively carries out the importing to the high-pressure fluid (refrigerant) of two operating chambers, discharge, utilizes two operating chambers Slidingtype main valve plug described in pressure official post slides in left-right direction, to carry out the flow path switching.

Existing technical literature

Patent document

Patent document 1: Japanese Unexamined Patent Publication 8-170864 bulletin

Subject to be solved by the invention

In flow channel switching valve previous as mentioned, there is the project to be solved as follows.

That is, in six direction changeover valves (flow channel switching valve) of the slidingtype described in patent document 1, six port pA~ Five port pB~pF in pF are set side by side in the axial direction, therefore the main valve seat equipped with five port pB~pF, cunning Dynamic formula main valve plug (on axis direction) is elongated, it is difficult to ensure with the valve seat for the main valve seat that slidingtype main valve plug sliding freely docks Face, slidingtype main valve plug sealing surface face precision (flatness), have initial stage leakage, leak (valve leakage) caused by durable deterioration Increased worry.

In addition, in the lesser main valve shell of internal volume, the collision such as high-pressure fluid (refrigerant) and inner wall, and it is flowed The harm for being significantlyd change in crank-like, therefore thering is the pressure loss to become larger.

Except above-mentioned points, it in previous flow channel switching valve, is especially used in the heat pump type refrigerating heating system Flow channel switching valve in, in main valve shell, the refrigerant of high temperature and pressure is (from port pA to port pB, from port pA to port The refrigerant of pF flowing) and low-temp low-pressure refrigerant (from port pC to port pD, the refrigeration flowed from port pE to port pD Agent) it is flowed with close state.Specifically, the refrigerant of the refrigerant and low-temp low-pressure of high temperature and pressure is passed through in refrigeration operation It is flowed by main valve seat in adjacent port pB and port pC, in heating operation via main valve seat in adjacent port pF and port PC flowing, but the main valve seat for being equipped with each port is generally made by the high metal of pyroconductivity, therefore the heat exchange between them The problem of amount (that is, heat loss) becomes larger, and also systematic efficiency deteriorates.

Summary of the invention

The present invention has been made in view of the above-described circumstances, and an object thereof is to provide a kind of flow channel switching valve, can be difficult to make Valve leakage, and effectively inhibit the pressure loss.

In addition, other objects of the present invention are to provide a kind of flow channel switching valve, in heat pump type refrigerating heating system etc. In the environment of the fluid flowing of the fluid and low-temp low-pressure of high temperature and pressure in the case where use, it can reduce heat loss and make heat pump The efficiency of formula refrigerating and heating systems improves.

Means for solving the problems

In order to reach the purpose, flow channel switching valve of the invention substantially has: the main valve shell of tubular, the main valve Shell is configured with piston and main valve chamber；Main valve seat, the valve seat which there is opening to have multiple ports；The master of slidingtype Spool, the main valve plug are configured in the main valve chamber to move in the axial direction, and sliding freely with the valve seat Face docking；And union body, the union body are used to make the main valve plug mobile with the round-trip of the piston, which cuts Changing valve keeps the main valve plug mobile via the union body in the main valve chamber, is switched between the port being thus connected to, should Flow channel switching valve is characterized in that the axis relative to the main valve shell has multiple ports in opposite side opening, and described Main valve plug is configured to pair of sliding spool and is matched with the state that the back side is aligned on the direction orthogonal with the valve seat of the main valve seat It sets, being respectively equipped in the pair of sliding spool selectively makes the U-shaped being connected between the multiple port turn to access, the company Knot body is by having one or more pieces plates of a pair of of supporting board to constitute, the valve seat of a pair of supporting board and the main valve seat It is separated from each other in parallel and on the direction orthogonal with the valve seat of the main valve seat and configures, the pair of sliding valve core difference Connection is fitted into or is sticked in the pair of supporting board, is moved with the round-trip with the piston.

In a preferred manner, opening, the pair of sliding valve core difference are respectively formed in the pair of supporting board With the piston round-trip and in the axial direction integrally movably by the opening promotion, and with institute It states and is sliding freely embedded in the opening on the orthogonal direction of valve seat of main valve seat.

In other preferred modes, the pair of supporting board is respectively in the respective close institute of the pair of sliding valve core It states the position connection of valve seat, be fitted into or be sticked in the pair of sliding spool.

In other preferred modes, in the company of the union body extended between the supporting board and the piston Fishplate bar portion is formed with other opening.

In other preferred modes, the union body is by being respectively provided with the identical of the supporting board and reverse configuration A pair of of plate of size and same shape is constituted.

In another preferred mode, it is equipped with docking stage portion in the pair of plate, the docking stage portion is for making this A pair of of plate aligned in position each other.

In other preferred modes, the union body is made of the sheet material with the pair of supporting board.

Invention effect

In six direction changeover valves of the invention, being open respectively in the side opposite with axis of main valve shell has multiple ends Mouthful, main valve plug is configured to pair of sliding spool and is matched with the state that the back side is aligned on the direction orthogonal with the valve seat of main valve seat It sets, which, which is respectively equipped with, selectively makes the U-shaped of the multiple port connection turn to access, makes main valve plug in master Valve indoor moving, to be switched between the port of connection.Therefore, switch with the flow path of previous slidingtype main valve plug has been used Valve is compared, and main valve seat, main valve plug (on axis direction) equipped with port can be made to shorten, therefore it is easy to ensure that main valve seat valve seat Face, main valve plug sealing surface face precision (flatness), check valve leakage, and fluid (such as high-pressure fluid (refrigerant)) pass through Flow channels are turned to by U-shaped, therefore the loss that can also reduce pressure.

On the basis of above-mentioned, in the height that the flow channel switching valve of present embodiment is used for heat pump type refrigerating heating system etc. In the case where the environment of the refrigerant flowing of the refrigerant and low-temp low-pressure of warm high pressure, the U-shaped of the refrigerant flowing of high temperature and pressure The U-shaped for turning to the refrigerant flowing of access and low-temp low-pressure turns to access and is not set as via for example metal main valve seat point From farther out, therefore compared to the refrigerant of the refrigerant of high temperature and pressure and low-temp low-pressure via metal main valve seat and with close State flowing previous structure, the heat exchange amount (that is, heat loss) between them can be greatly reduced, it is thus possible to enough It is improved this effect of the efficiency of system.

In addition, union body is parallel with the valve seat of main valve seat with being configured in the flow channel switching valve of present embodiment And a pair of of the supporting board separated on the direction (short transverse of valve seat) orthogonal with the valve seat of the main valve seat, it is a pair of First and second sliding valve core is linked respectively in a manner of movement by the round-trip with piston respectively, is fitted into or is sticked in this A pair of of supporting board.Therefore, it is made of with such as union body a sheet material of the valve seat configured in parallel with main valve seat previous Flow channel switching valve compare, can close to valve seat position pressing main valve plug (specifically, constitute each sliding of main valve plug Spool), inhibit the inclination of main valve plug and it is made swimmingly to move (sliding), therefore, thus also check valve leaks, and due to suppression Resistance to sliding processed, therefore can be improved action.

In addition, in the flow channel switching valve of present embodiment, each sliding valve core of main valve plug is constituted with can be relative to valve The mode that seat surface moves up and down is supported on each supporting board, therefore there are also it is easy to ensure that this advantage of leakproofness.

Project, structure and function and effect other than the above are become apparent from by the following embodiments and the accompanying drawings.

Detailed description of the invention

Fig. 1 is the first connected state for indicating the first embodiment of flow channel switching valve (six direction changeover valves) of the invention The longitudinal section view of (when refrigeration operation).

Fig. 2 is the second connected state for indicating the first embodiment of flow channel switching valve (six direction changeover valves) of the invention The longitudinal section view of (when heating operation).

Fig. 3 is the cross-sectional view of the U-U arrow line along Fig. 1.

Fig. 4 is the major part amplification longitudinal section view for the major part that amplification indicates six direction changeover valve shown in FIG. 1.

Fig. 5 is a pair of the composition union body for the embodiment for indicating flow channel switching valve (six direction changeover valves) of the invention The figure of link plate, (A) are longitudinal section views, and (B) is side view, and (C) is top view.

Fig. 6 is the figure of four-way pilot valve used in amplification expression flow channel switching valve (six direction changeover valves) of the invention, (A) Be indicate be the first connected state (when refrigeration operation) while disconnecting (be powered) longitudinal section view, (B) is to indicate the second connected state The longitudinal section view of (when heating operation) (when energization is connected).

Fig. 7 is to use six direction changeover valves as the outline structure of an example of the heat pump type refrigerating heating system of flow channel switching valve Figure, (A) is schematic structural diagram when indicating refrigeration operation, and (B) is schematic structural diagram when indicating heating operation.

Symbol description

1 six direction changeover valves (flow channel switching valve)

10 six-way valve main bodys

11 main valve shells

11A upper end side cover

11B lower end side cover

12 main valve chambers

13 first main valve seats (valve seat)

14 second main valve seats (valve seat)

15 main valve plugs

The first sliding valve core of 15A

The second sliding valve core of 15B

The fitting projection of the first sliding valve core of 15a

The cylindrical portion of the second sliding valve core of 15b

The first U-shaped of 16A turns to access (access)

The second U-shaped of 16B turns to access (access)

16a intercommunicating pore

17 pressure chambers

18 O-rings

21 first pistons

22 second pistons

25 union bodies

25A, 25B a pair of link plate (plate)

25a supporting board

25b web portion

25c installs foot

25d rectangular aperture

25e circular open

25f docks stage portion

31 first operating chambers

32 second operating chambers

90 four-way pilot valves

The port pA, pB, pC, pD, pE, pF

Specific embodiment

Hereinafter, the embodiments of the present invention will be described with reference to the drawings.

Fig. 1 and Fig. 2 is the vertical profile for indicating an embodiment of six direction changeover valves as flow channel switching valve of the invention View, Fig. 1 are the figures for indicating the first connected state (when refrigeration operation), and Fig. 2 is to indicate the second connected state (when heating operation) Figure.Fig. 3 is the cross-sectional view of the U-U arrow line along Fig. 1.

In addition, in the present specification, indicating that the statement of the position, direction of top to bottom, left and right, front and rear etc. is in order to avoid explanation Become cumbersome and marked for convenience's sake according to attached drawing, is not limited to refer to that actually group enters heat pump type refrigerating heating system etc. Position, direction under state.

In addition, in the various figures, the spacing distance etc. between the gap that is formed between component, component is for easy understanding to send out It is bright, facilitate mapping in addition to realizing, describes sometimes more than or less than the size of each structure member.

Six direction changeover valves 1 of illustrated embodiment are as heat pump type refrigerating system shown in Fig. 7 (A) for example above-mentioned, (B) The structure for the slidingtype that six direction changeover valves 180 in hot systems 100 use, substantially has: the six-way valve main body 10 of cylinder type With the single electromagnetic type four-way pilot valve 90 as pilot valve.In addition, six direction changeover valves 1 of present embodiment have six A port is corresponding with each port pA~pF of above-mentioned six direction changeover valve 180 and marks the same symbol.

[structure of six-way valve main body 10]

Six-way valve main body 10 has the main valve shell 11 of the metal tubulars such as brass or stainless steel, in the main valve shell 11 In, the first operating chamber 31, first piston 21, main valve chamber 12, second piston 22 and are configured in order from one end (upper end side) Two operating chambers 32.In described first and second piston 21,22, in order to airtightly separate main valve shell 11, in main valve shell The inner peripheral surface of body 11 is equipped with the band spring shim crimped with its peripheral part.

It is airtightly fixed with and the upper end side cover 11A of the umbrella for retainer in the upper end of main valve shell 11, on this End side cover 11A prevents the movement of the upward direction of the first piston 21 of the first operating chamber 31 of zoning formation volume-variable, The lower end side cover 11B of the simultaneous umbrella for retainer, the lower end side cover are airtightly fixed in the lower end of main valve shell 11 Component 11B prevents the movement in downward direction of the second piston 22 of the second operating chamber 32 of zoning formation volume-variable.For to First operating chamber 31 and the second operating chamber 32 import, port p11, p12 of discharge high-pressure fluid (refrigerant) are respectively arranged in Upper end side cover 11A and lower end side cover 11B.

It is equipped in the main valve shell 11 (main valve chamber 12) and adds up to six ports.

Specifically, in the left part center of the main valve chamber 12, surface (right side) is such as metal of flat valve seat The first main valve seat (valve seat) 13 of system is airtightly fixed on main valve shell 11 (inner circumferential) by soldering etc., in first main valve seat 13 valve seat, three be made of pipe fitting the port extended to the left (are followed successively by port pB, port pA, end from upper end side Mouthful pF) it longitudinal arrangement (being arranged on axes O direction) and is substantially open at equal intervals.

In addition, the main valve chamber 12 right part center (position opposite with the first main valve seat 13, in other words, relative to Axes O is located at the position of the side opposite with the first main valve seat 13), surface (left side) is such as made of metal of flat valve seat The second main valve seat (valve seat) 14 by be brazed etc. be airtightly fixed on main valve shell 11 (inner circumferential), in second main valve seat 14 Valve seat, three be made of pipe fitting the port extended to the right (is followed successively by port pC, port pD, port from upper end side PE it) longitudinal arrangement (being arranged on axes O direction) and is substantially open at equal intervals.

It is set to each port (port pB, port pA, port pF) of the first main valve seat 13 and is set to the second main valve seat 14 Each port (port pC, port pD, port pE) be set in opposite position (relative to axes O opposite side), and this In example, the bore for being set to each port pA~pF of the first main valve seat 13 and the second main valve seat 14 is set at essentially identical mouth Diameter.

In the main valve chamber 12, the main valve plug 15 of the rectangular-shaped slidingtype in the section with runway-shaped annular sealing surface Can movably be configured along axes O direction (up and down direction), the two sides (left side and the right side) of main valve plug 15 respectively with it is described The valve seat of first main valve seat 13 and the second main valve seat 14 sliding freely docks.

The main valve plug 15 is such as synthetic resin system, the first sliding valve core 15A of 13 side of the first main valve seat (left side) with The state configuration that second sliding valve core 15B of 14 side of the second main valve seat (right side) is aligned with the back side.

It is opened up in the left side side (side opposite with the second side sliding valve core 15B) of the first sliding valve core 15A recessed by bowl-type It falls into the first U-shaped constituted and turns to access (access) 16A, the size which turns to access 16A is selectively to make Adjacent two port (port pB and port pA, Huo Zheduan in three ports that the valve seat of the first main valve seat 13 is open The size that mouth pA is connected to port pF).In addition, in the right side side of the second sliding valve core 15B (with the first side sliding valve core 15A phase Anti- side) the second U-shaped steering access (access) 16B being made of bowl shaped depression is opened up, which turns to access 16B Size be can selectively make the second main valve seat 14 valve seat be open three ports in adjacent two port (the size that port pC and port pD or port pD are connected to port pE).

On the other hand, in the left side of the second sliding valve core 15B (face opposite with the first sliding valve core 15A), (to the left) prolongs It stretches and is provided with the cylindrical portion 15b roughly the same with the shape of second sliding valve core 15B, on the right side of the first sliding valve core 15A (in other words, (face opposite with the second sliding valve core 15B), (to the right) are provided projectingly the shape than first sliding valve core 15A The shape of second sliding valve core 15B) slightly smaller tubular fitting projection 15a.It is sliding freely interior by the fitting projection 15a Embedded in the cylindrical portion 15b (clipping O-ring 18 between fitting projection 15a and cylindrical portion 15b), thus the first sliding valve core (the direction vertical with axes O, and be set to the first main valve seat 13 each in left and right directions 15A and the second sliding valve core 15B Port (port pB, port pA, port pF) and each port (port pC, port pD, port pE) for being set to the second main valve seat 14 Opposite direction) on slightly move freely each other, and integrally moved freely on (axes O direction) in above-below direction.

In addition, the configuration of the cylindrical portion 15b of the fitting projection 15a of the first sliding valve core 15A and the second sliding valve core 15B are closed System may be reversed.That is, cylindrical portion can also be arranged in the first sliding valve core 15A, it is fitted into the second sliding valve core 15B setting convex Portion embeds the fitting projection of the second sliding valve core 15B in the cylindrical portion of the first sliding valve core 15A, makes first sliding valve core 15A It is integrally formed with the second sliding valve core 15B.

In addition, in illustrated example, the first sliding valve core 15A the right side (part of the inside of fitting projection 15a) with Small gap is formed between the left side (part of the inside of fitting projection 15a) of second sliding valve core 15B, and first Sliding valve core 15A (bottom of the first U-shaped steering access 16A) is equipped with by the first U-shaped is turned to access 16A and gap company The intercommunicating pore 16a that logical cross-drilled hole is constituted, (specifically, being arranged between the fitting projection 15a and the cylindrical portion 15b Endless groove in the periphery of fitting projection 15a) equipped with O-ring 18 as a seal part.

Therefore, it will be set as pressure chamber 17 than the part of the O-ring 18 comprising the gap in the inner part, from port (row Side high pressure port out) pA via the first U-shaped turn to access 16A and intercommunicating pore 16a to the pressure chamber 17 import high-pressure fluid (system Cryogen).The pressure chamber 17 and main valve chamber 12 seal (closing) by the O-ring 18 being configured between them.

Here, referring to Fig.1~Fig. 3 and Fig. 4 on (direction vertical with axes O) it is found that observe, first in left and right directions The compression area Sb of 17 side of pressure chamber (right side side) of sliding valve core 15A is greater than the compression face of 13 side of the first main valve seat (left side side) Product Sa.

More specifically, the pressure chamber 17 relative to the projected area of the plane vertical with left and right directions, i.e. due to leading Enter the high-pressure refrigerant in the pressure chamber 17 and the face of the pressure for the left direction that the first sliding valve core 15A (right side) is born Projected area (compression area Sb), greater than 13 side of the first main valve seat annular sealing surface relative to vertical with left and right directions The projected area of plane, i.e. due to the high-pressure refrigerant that is flowed in port (inside of annular sealing surface) and the first sliding valve core 15A (left side) bears the projected area (compression area Sa) in the face of the pressure of right direction.

Access 16A is turned to the first U-shaped via port (discharge side high pressure port) pA as a result, and imports high-pressure refrigerant, is led The a part for entering the high-pressure refrigerant for turning to access 16A to first U-shaped is filled into pressure chamber 17 via the intercommunicating pore 16a When, by the pressure that is subject to from pressure chamber 17 (high-pressure refrigerant) (more specifically, from pressure chamber 17 (high-pressure refrigerant) The differential pressure of the pressure being subject to and the pressure being subject to from the refrigerant (low pressure refrigerant) for turning to access 16B flowing in the second U-shaped), The right side (annular sealing surface) of second sliding valve core 15B is pressed against the valve seat of the second main valve seat 14, and by from pressure The pressure that power room 17 (high-pressure refrigerant) is subject to turns to the refrigerant (high-pressure refrigeration that access 16A flows with from the first U-shaped Agent) differential pressure of pressure that is subject to, the left side (annular sealing surface) of the first sliding valve core 15A is pressed against the first main valve seat 13 Valve seat.

In addition, in this example, turning to access 16A and the second sliding valve core in the first U-shaped of the first sliding valve core 15A The second U-shaped of 15B turns to the substantial middle of access 16B, towards front-rear direction be provided with the enhancing pin 15c kept for shape, 15d。

In addition, in this example, (constituting the first sliding valve core 15A and the second slide-valve of main valve plug 15 in main valve plug 15 Core 15B) outer peripheral surface (upper and lower surface and front and rear surfaces) form concave face 15e, concave face 15e is embedded in aftermentioned connection The rectangular aperture 25d (upper and lower end edge portion) of link plate 25A, 25B of body 25.

As previously mentioned, first sliding valve core 15A and the second sliding valve core 15B are integrally formed simultaneously in the main valve plug 15 It is moved along axes O direction, can selectively obtain refrigeration position (upper end position) as shown in Figure 1 and heating as shown in Figure 2 Position (lower end position), the refrigeration position are to open port pF and make port pB and port pA via the first sliding valve core 15A First U-shaped turns to access 16A connection, and opens port pE and make port pC and port pD via the second sliding valve core 15B's Second U-shaped turns to the position of access 16B connection, which is to open port pB and make port pA and port pF via first The first U-shaped of sliding valve core 15A turns to access 16A connection, and opens port pC and make port pD and port pE via second The second U-shaped of sliding valve core 15B turns to the position of access 16B connection.

First sliding valve core 15A of main valve plug 15 when moving other than, two port (port pB in three ports With port pA or port pA and port pF) just on, the second sliding valve core 15B of main valve plug 15 when moving other than, be located at Two ports (port pC and port pD or port pD and port pE) in three ports just on, at this point, by from setting It is placed in the pressure chamber 17 between the first sliding valve core 15A and the second sliding valve core 15B (high-pressure refrigerant for importing pressure chamber 17) Pressure, compression helical spring 19 active force, the first sliding valve core 15A and the second sliding valve core 15B are crimped on a left side respectively It is right pressing and the valve seat with the first main valve seat 13 and the second main valve seat 14.

First piston 21 and second piston 22 are connected to and can integrally be moved by union body 25, and the of the main valve plug 15 One sliding valve core 15A and the second sliding valve core 15B slightly to slide freely and front and rear directions and up and down directions in the lateral direction On the state that is substantially prevented of movement be fitted into and be supported on the union body 25.

In this example, the union body 25 is by for example passing through the identical size and same shape produced such as stamping A pair of of plate constitute, each plate is in the mode orthogonal with left and right directions (in other words, to be parallel to the first main valve seat 13 and second The mode of the valve seat of main valve seat 14) configuration, and this pair of of plate in left and right directions on (direction orthogonal with valve seat) that This separation and relative configuration.In addition, hereinafter, the plate for being configured at left side (the first side sliding valve core 15A) is known as link plate The plate for being configured at right side (the second side sliding valve core 15B) is known as link plate 25B by 25A.

More specifically, referring to Fig.1~Fig. 3 and Fig. 5 it is found that each link plate 25A, 25B by (symmetrical relative to center line Line) symmetrically the rectangular-shaped plate composition of lengthwise, the center line extend in left-right direction from the center of each link plate 25A, 25B. (up and down direction) central portion of each link plate 25A, 25B are set as supporting board 25a, supporting board 25a is used for will be described Main valve plug 15 (the first sliding valve core 15A, the second sliding valve core 15B) engaging bearing is integratedly in the shifting of axes O direction It moves freely, is formed with square of such as corner with circular arc (with R) in supporting board 25a (that is, central portion of link plate 25A, 25B) Shape opening 25d, the first sliding valve core 15A, the second sliding valve core 15B of main valve plug 15 are sliding freely embedded in square from left and right sides Shape opening 25d.The first sliding valve core 15A, the second sliding valve core 15B of main valve plug 15 are with first and second piston 21,22 It moves back and forth and is pushed by the part rectangular aperture 25d of each link plate 25A, 25B of the union body 25, thus in refrigeration position It is round-trip between (upper end position) and heating position (lower end position).In this example, the rectangular aperture 25d of each link plate 25A, 25B The first main valve seat 13, the second main valve in the first sliding valve core 15A, the second sliding valve core 15B of the part to push main valve plug 15 The mode at the position by valve seat of seat 14, each link plate 25A, the 25B (supporting board 25a) (in the lateral direction) point From configuration.

The upper and lower of the supporting board 25a in each link plate 25A, 25B is set as extending up to first piston 21 or the Web portion 25b until two pistons 22, web portion 25b (in other words, rectangular aperture 25d up and down), in more detail and Speech, main positioned at the port pF of the downside of the first main valve seat 13 and second when main valve plug 15 is in refrigeration position (upper end position) The position of the substantially positive side of the port pE of the downside of valve seat 14 forms (with port pF, pE substantially with diameter) circular open 25e, And in the port pB and second when main valve plug 15 is in heating position (lower end position) positioned at the upside of the first main valve seat 13 The position of the substantially positive side of the port pC of the upside of main valve seat 14 forms (with port pB, pC substantially with diameter) circular open 25e。

In addition, being equipped with installation foot 25c, the peace in the upper and lower end of each link plate 25A, 25B (web portion 25b) Dress foot 25c is formed towards the side link plate 25B, 25A substantially 90-degree bent being oppositely disposed, and in the installation foot, 25c spiral shell is equipped with Threaded hole 29 (referring particularly to Fig. 5 (C)), the threaded hole 29 for inserting link plate 25A, 25B and first piston 21 or The bolt 30 that second piston 22 links.

In addition, in this example, it is contemplated that assemblability (is described in detail) later, installs foot 25c's in each link plate 25A, 25B End forms docking stage portion 25f, and (referring particularly to Fig. 5 (C), the docking stage portion 25f is for making the link plate 25A, 25B (left and right directions and in the front-back direction position) is abutted with link plate 25B, 25A of relative configuration and aligned in position is (that is, make A pair of of link plate 25A, 25B aligned in position each other).

In this example, as described above, each link plate 25A, 25B are made of the plate of identical size and same shape, because Two panels link plate 25A, 25B are oppositely disposed by this in the lateral direction, and oppositely (detailed via the docking stage portion 25f Combination (in the state of aligned in position each other) configuration for thin, up and down on the contrary), the bearing in each link plate 25A, 25B The first sliding valve core 15A and second that the rectangular aperture 25d (respectively from left and right directions) of plate portion 25a configures the main valve plug 15 is sliding Movable valve plug 15B.And each installation foot 25c is fixed on the first piston 21 or second piston 22 via bolt 30, thus The the first sliding valve core 15A and the second sliding valve core 15B of the main valve plug 15 in the lateral direction slightly slide freely and Movement in the longitudinal direction is embedded in the union body 25 in the state of being substantially prevented.

It is fitted into and the main valve plug 15 for being supported on union body 25 (a pair of of link plate 25A, 25B) is living with first and second Plug 21,22 round-trip and by the upper end edge portion of the rectangular aperture 25d in link plate 25A, 25B of the union body 25 or under End edge portion pushes (here, the upper and lower surface of the first sliding valve core 15A and the second sliding valve core 15B of main valve plug 15 are pressed), To round-trip between refrigeration position (upper end position) and heating position (lower end position).

[movement of six-way valve main body 10]

Then, the movement of six-way valve main body 10 with structure as described above is illustrated.

Heating position (lower end position) (as shown in Figure 2 second is in the main valve plug 15 being configured in main valve shell 11 Connected state) when, via aftermentioned four-way pilot valve 90, make the second operating chamber 32 and the port pA as discharge side high pressure port Connection, and be connected to the first operating chamber 31 with the port pD as suction side low-pressure port, then it is imported to the second operating chamber 32 The refrigerant of high temperature and pressure, and from the first operating chamber 31 discharge high temperature and pressure refrigerant.Therefore, the other end of main valve chamber 12 The pressure of second operating chamber 32 of side (lower end side) is higher than the pressure of the first operating chamber 31 of the one end (upper end side) of main valve chamber 12 Power, as shown in Figure 1, the first, second piston 21,22 and main valve plug 15 are moved upward, first piston 21 and upper end side cover Part 11A abuts locking, and main valve plug 15 is in refrigeration position (upper end position) (the first connected state as shown in Figure 1).

It is connected to port pA with port pB (turning to access 16A via the first U-shaped), makes port pC and port pD (warp Access 16B is turned to by the second U-shaped) connection, it is connected to port pE with port pF (via main valve chamber 12), therefore such as Fig. 7 (A), (B) It is shown, in heat pump type refrigerating heating system 100, carry out refrigeration operation.

When main valve plug 15 is in refrigeration position (upper end position) (the first connected state as shown in Figure 1), via aftermentioned Four-way pilot valve 90, be connected to the first operating chamber 31 with the port pA as discharge side high pressure port, and make the second movement Room 32 is connected to the port pD as suction side low-pressure port, then the refrigerant of high temperature and pressure is imported to the first operating chamber 31, and And the refrigerant of high temperature and pressure is discharged from the second operating chamber 32.Therefore, the first movement of the one end (upper end side) of main valve chamber 12 The pressure of room 31 is higher than the pressure of the second operating chamber 32 of the another side (lower end side) of main valve chamber 12, as shown in Fig. 2, first, Second piston 21,22 and main valve plug 15 move downwards, and second piston 22 abuts locking, main valve with lower end side cover 11B Core 15 is in heating position (lower end position) (the second connected state as shown in Figure 2).

It is connected to port pA with port pF (turning to access 16A via the first U-shaped), makes port pE and port pD (warp Access 16B is turned to by the second U-shaped) connection, it is connected to port pC with port pB (via main valve chamber 12), therefore such as Fig. 7 (A), (B) It is shown, in heat pump type refrigerating heating system 100, carry out heating operation.

[structure of four-way pilot valve 90]

As the four-way pilot valve 90 of pilot valve, its structure itself is well known structure, such as enlarged drawing institute in Fig. 6 (A), (B) Show, base end side (left end side) periphery have be externally embedded to be fixed with electromagnetic coil 91 valve chest 92 is constituted by cylindric straight tube, In the valve chest 92, configuration magnetic-attraction element 95, compression helical spring 96, plunger 97 are sequentially connected in series from base end side.

The left part of valve chest 92 is sealingly engaged in the flange (periphery stage portion) of magnetic-attraction element 95 by welding etc., Magnetic-attraction element 95 is fastened and fixed to the cover 91A of the periphery of the exciting electromagnetic coil 91 of covering energization by bolt 92B.

On the other hand, there is the tubule for importing high-pressure refrigerant to insert mouth, and (high pressure imports the band filter of port a) Cover 98 the right-end openings portion of valve chest 92 is airtightly installed on by welding, soldering, riveting etc., by cover 98, column The region that plug 97 and valve chest 92 surround is valve chamber 99.Inserting mouth via the tubule for being airtightly plugged in cover 98, (high pressure is led The high pressure tubule #a with flexibility of inbound port a) imports high temperature from the port (discharge side high pressure port) pA to valve chamber 99 The refrigerant of high pressure.

In addition, inner face is that the valve seat 93 of flat valve seat is airtightly engaged in the column in valve chest 92 by soldering etc. Between plug 97 and cover 98, in the valve seat (inner face) of the valve seat 93, via tubule #b and the six-way valve main body 10 The connection of the first operating chamber 31 port b, connect with port (suction side low-pressure port) pD via tubule #c port c, via The port d that tubule #d is connect with the second operating chamber 32 is from tip side (right end side) successively along the length direction of valve chest 92 (left and right Direction) separate specified interval laterally opening arranged side by side.

The plunger 97 being oppositely disposed with magnetic-attraction element 95 is substantially cylindric, along axial (along valve casing in valve chest 92 The direction of the center line L of body 92) sliding freely configure.Spool holder 94A is pressed together with installation part 94B by its base end part Enter, rivet etc. to be mounted on the end of the side opposite with 95 side of magnetic-attraction element of the plunger 97, which will Spool 94 is remained in its free end side and can be slided in a thickness direction.Flat spring is installed in spool holder 94A 94C, flat spring 94C exert a force to the direction (thickness direction) that spool 94 is pressed on to valve seat 93.Spool 94 is in order to in valve seat Connected state between port b, c, d of 93 valve seat opening switches over, in the state docked with the valve seat of the valve seat 93 Under, it is slided with the movement of the left and right directions of plunger 97 in the valve seat of valve seat 93.

In addition, being equipped with recess portion 94a in spool 94, the size of recess portion 94a is the valve that can selectively make in valve seat 93 Between adjacent port b-c in three port b~d of seat surface opening, the size that is connected between c-d.

In addition, compression helical spring 96 compression be installed between magnetic-attraction element 95 and plunger 97 and to make plunger 97 from attraction The isolated direction of element 95 (right in the figure) force, in this example, valve seat 93 (left part) are to prevent plunger 97 to the right The retainer of the movement of side.In addition, the structure as the retainer, it needless to say can be using other structures.

In addition, to be installed on back side of six-way valve main body 10 etc. via installation part 92A appropriate for above-mentioned four-way pilot valve 90 Position.In addition, the port pD as suction side low-pressure port is connect with tubule #c, but can also in above-mentioned four-way pilot valve 90 It is connect with the port pC for flowing middle compression refrigerant with tubule #c.

[movement of four-way pilot valve 90]

In the four-way pilot valve 90 constituted as described above, when being disconnected to the energization of electromagnetic coil 91, such as Fig. 1 and Shown in Fig. 6 (A), plunger 97 passes through the active force of compression helical spring 96, is pushed position until its right end is abutted with valve seat 93 It is set to only.In this state, spool 94 is located on port b and port c, is connected to port b with port c by recess portion 94a, And port d is connected to valve chamber 99, therefore flows into the high-pressure fluid of port (discharge side high pressure port) pA via high pressure tubule #a 99 → port of → valve chamber d → tubule #d → port p12 imports the second operating chamber 32, and the high-pressure fluid of the first operating chamber 31 to Port p11 → tubule #b → port b → recess portion 94a → port c → tubule #c → port (suction side low-pressure port) pD flowing is simultaneously Discharge.

In contrast, when by being set as connecting to the energization of electromagnetic coil 91, as shown in Fig. 2 and Fig. 6 (B), plunger 97 By the attraction of magnetic-attraction element 95, (compression spiral shell is overcome until being attracted the position abutted until its left end with magnetic-attraction element 95 Revolve the active force of spring 96).At this point, spool 94 is located on port c and port d, connected by recess portion 94a port c and port d It is logical, and port b is connected to valve chamber 99, therefore flows into the high-pressure fluid of port (discharge side high pressure port) pA via high pressure fine Pipe #a → 99 → port of valve chamber b → tubule #b → port p11 imports the first operating chamber 31, and the high-pressure spray of the second operating chamber 32 Body is flowed to port p12 → tubule #d → port d → recess portion 94a → port c → tubule #c → port (suction side low-pressure port) pD It moves and is discharged.

Therefore, when by being set as disconnecting to the energization of electromagnetic coil 91, the main valve plug 15 of six-way valve main body 10 is from heating position (the second connected state) is set to refrigeration position (the first connected state) transfer, carries out flow path switching as described above, on the other hand, When by being set as connecting to the energization of electromagnetic coil 91, the main valve plug 15 of six-way valve main body 10 is from refrigeration position (the first connected state State) to heating position (the second connected state) transfer, carry out flow path switching as described above.

In this way, in six direction changeover valves 1 of present embodiment, by first to electromagnetic type four-way to switch to turn on/off The energization of pilot valve 90, thus using the high-pressure fluid to circulate in six direction changeover valves 1 (as the port pA of high-pressure section flowing Fluid) with low-pressure fluid (as low-pressure section port pD flowing fluid) differential pressure, make constitute six-way valve main body 10 Main valve plug 15 moved in main valve chamber 12, so as to switch the company being set between total six ports of main valve shell 11 Logical state, as shown in Fig. 7 (A), (B), in heat pump type refrigerating heating system 100, progress is from heating operation to refrigeration operation Switch and from refrigeration operation to the switching of heating operation.

[function and effect of six direction changeover valves (flow channel switching valve) 1]

From above explanation it is appreciated that in six direction changeover valves 1 of present embodiment, in main valve chamber 12, make port PB, port pA and port pF on axes O direction and row of openings, and with port pB, port pA and port pF relative to axis Line O opposite side makes port pC, port pD and port pE on axes O direction and row of openings, and main valve plug 15 is configured to a pair of First and second sliding valve core 15A, 15B is orthogonal with the valve seat of main valve seat (the first main valve seat 13 and the second main valve seat 14) Direction on the back side alignment state configuration, first and second sliding valve core of a pair 15A, 15B, which are respectively equipped with, selectively to be made Three ports (port pB, port pA and port pF and port pC, port pD and port pE) connection first and second U-shaped turns to access 16A, 16B, makes main valve plug 15 mobile in main valve chamber 12, to be switched between the port of connection.Therefore, Compared with the flow channel switching valve for having used previous slidingtype main valve plug, main valve seat (the first main valve seat equipped with port can be made 13 and the 2nd main valve seat 14), main valve plug 15 (on axes O direction) shorten, therefore it is easy to ensure that main valve seat (the first main valve seat 13 and Second main valve seat 14) valve seat, main valve plug 15 sealing surface face precision (flatness), check valve leakage, and fluid (example Such as high-pressure fluid (refrigerant)) it is flowed via the first U-shaped steering access 16A, therefore the loss that can also reduce pressure.

In addition, in the present embodiment, the fluid (such as low pressure refrigerant) flowed in six-way valve main body 10 is via Two U-shapeds turn to access 16B flowing, and fluid (such as in compression refrigerant) in main valve chamber 12 in left-right direction (linearly) Flowing, therefore, thus also can reduce the pressure loss.

On the basis of above-mentioned, six direction changeover valves 1 of present embodiment are being used for heat pump type refrigerating heating system etc. In the case where the environment of the refrigerant of the refrigerant of high temperature and pressure and low-temp low-pressure flowing, the of the refrigerant flowing of high temperature and pressure The second U-shaped that one U-shaped turns to the refrigerant flowing of access 16A and low-temp low-pressure turns to access 16B not via for example metal Main valve seat and be set as separation farther out, therefore compared to the refrigerant of high temperature and pressure and the refrigerant of low-temp low-pressure via made of metal Main valve seat and with the previous structure that close state flows, the heat exchange amount between them can be greatly reduced (that is, heat waste Lose), it is thus possible to access this effect of the efficiency of raising system.

In addition, union body 25, which has, to be configured to and main valve seat (the first main valve in six direction changeover valves 1 of present embodiment The 13 and the 2nd main valve seat 14 of seat) valve seat it is parallel and with the main valve seat (the first main valve seat 13 and the second main valve seat 14) A pair of of the supporting board 25a separated on the orthogonal direction of valve seat (short transverse of valve seat), first and second a pair of sliding Spool 15A, 15B link in a manner of movement by the round-trip with piston 21,22 respectively respectively, it is chimeric or be sticked in this one To supporting board 25a.Therefore, it is made of with such as union body a sheet material of the valve seat configured in parallel with main valve seat previous Flow channel switching valve compare, can close to valve seat position pressing main valve plug 15 (specifically, constitute main valve plug 15 it is each First and second sliding valve core 15A, 15B), inhibit the inclination of main valve plug 15 and it is made swimmingly to move (sliding), therefore, thus Also check valve leaks, and due to inhibiting resistance to sliding, can be improved action.

In addition, constituting first and second each sliding valve core of main valve plug 15 in six direction changeover valves 1 of present embodiment 15A, 15B are supported on each supporting board 25a in a manner of it can move up and down relative to valve seat, therefore there are also it is easy to ensure that close This advantage of envelope property.

In addition, in the above-described embodiment, having three to being open respectively with the side opposite with axes O in main valve shell 11 Six direction changeover valves of a total six port pA~pF are to illustrate to be illustrated, but be set to 11 (main valve chamber of main valve shell 12) quantity of port, position, the structure of main valve shell 11, shape, the master being configured in main valve shell 11 (main valve chamber 12) Structure, shape of spool 15 etc. are not limited to illustrated example certainly.

In addition, in the above-described embodiment, to the identical ruler by being respectively provided with the supporting board 25a with rectangular aperture 25d The example that very little and same shape a pair of of plate constitutes union body 25 is illustrated, and the union body 25 can also be formed will for example One sheet material bending etc. and separate in the lateral direction and a pair of of supporting board 25a etc. for being oppositely disposed.In addition, in above-mentioned implementation In mode, the web portion 25b of each link plate 25A, 25B of composition union body 25 are in the same manner as supporting board 25a (in right and left Configured separate upwards), but can certainly make each link plate 25A, 25B web portion 25b part or all each other Close side is upwardly-deformed to dock.

In addition, in six direction changeover valves 1 of above embodiment, to using four-way pilot valve 90 to drive in main valve chamber 12 The structure of main valve plug 15 is illustrated, but can also for example replace four-way pilot valve 90, be using motor in main valve chamber 12 Drive the structure of main valve plug 15.

In addition, in six direction changeover valves 1 of above embodiment, can not only group enter heat pump type refrigerating heating system, when So can also group enter other systems, device, equipment class.

Claims

1. a kind of flow channel switching valve, has: the main valve shell of tubular, the main valve shell are configured with piston and main valve chamber；Main valve Seat, the valve seat which there is opening to have multiple ports；The main valve plug of slidingtype, the main valve plug are configured in the main valve Interior can move in the axial direction, and sliding freely dock with the valve seat；And union body, the union body are used for Keep the main valve plug mobile with the round-trip of the piston, which pass through the spool in the main valve chamber It is moved by the union body, is switched between the port being thus connected to, which is characterized in that,

Axis relative to the main valve shell has multiple ports in opposite side opening, and the main valve plug is configured to a pair of of cunning Movable valve plug is with the state configuration that the back side is aligned on the direction orthogonal with the valve seat of the main valve seat, in the pair of sliding spool Being respectively equipped with selectively makes the U-shaped being connected between the multiple port turn to access,

The union body is by having one or more pieces plates of a pair of of supporting board to constitute, a pair of supporting board and the main valve The valve seat of seat is parallel and is separated from each other and configures, the pair of cunning on the direction orthogonal with the valve seat of the main valve seat Movable valve plug links respectively, is fitted into or is sticked in the pair of supporting board, is moved with the round-trip with the piston.

2. flow channel switching valve according to claim 1, which is characterized in that

It is respectively formed with opening in the pair of supporting board, the pair of sliding valve core is respectively with the round-trip shifting of the piston It moves and is integrally movably pushed in the axial direction by the opening, and orthogonal with the valve seat of the main valve seat Direction on be sliding freely embedded in the opening.

3. flow channel switching valve according to claim 1 or 2, which is characterized in that

The pair of supporting board is respectively in the position of the respective close valve seat of the pair of sliding valve core connection, chimeric Or it is sticked in the pair of sliding spool.

4. flow channel switching valve according to any one of claim 1-3, which is characterized in that

Other opening is formed in the web portion of the union body extended between the supporting board and the piston.

5. flow channel switching valve described in any one of -4 according to claim 1, which is characterized in that

The union body is by being respectively provided with the identical size of the supporting board and reverse configuration and a pair of of plate of same shape Material is constituted.

6. flow channel switching valve according to claim 5, which is characterized in that

It is equipped with docking stage portion in the pair of plate, the docking stage portion is for making a pair of plate aligned in position each other.

7. flow channel switching valve described in any one of -4 according to claim 1, which is characterized in that

The union body is made of the sheet material with the pair of supporting board.