CN113970000A

CN113970000A - Integrated assembly

Info

Publication number: CN113970000A
Application number: CN202010726743.2A
Authority: CN
Inventors: 不公告发明人
Original assignee: Zhejiang Sanhua Automotive Components Co Ltd
Current assignee: Zhejiang Sanhua Automotive Components Co Ltd
Priority date: 2020-07-25
Filing date: 2020-07-25
Publication date: 2022-01-25

Abstract

An integrated assembly comprises a one-way valve, a connecting part and a liquid storage part, wherein the connecting part and the liquid storage part are connected into a whole, the integrated assembly is provided with a liquid storage cavity, the connecting part is provided with a pore passage, the pore passage comprises a first pore passage and a second pore passage, the first pore passage comprises a first inlet and a first outlet, and a working medium enters the first pore passage from the first inlet and leaves the first pore passage through the first outlet and/or the second outlet; the liquid storage cavity can be communicated with a second pore passage, the second pore passage comprises a second outlet, the working medium passing through the liquid storage device leaves the second pore passage through the second outlet, the one-way valve is positioned in the second pore passage, the working medium enters the liquid storage cavity through the one-way valve, and the one-way valve can prevent the working medium in the liquid storage cavity from leaving the liquid storage cavity from the one-way valve; the one-way valve and the liquid storage part are integrated into a whole through the connecting part, the one-way valve is located in a pore channel formed by the connecting part, the liquid storage part is located on one side of the connecting part, and the pore channel is arranged in the connecting part, so that the three parts are communicated, and the structure is simple and compact.

Description

Integrated assembly

Technical Field

The invention relates to a part of a vehicle thermal management system, in particular to an integrated assembly.

Background

The thermal management system of a vehicle comprises an air conditioning system which comprises a liquid reservoir and a valve assembly, wherein the liquid reservoir and the valve assembly are usually connected in the system through pipelines, so that the installation of parts is complex, the occupied space is large, and under the condition of meeting the functions of the parts, the problem of simplifying the installation and making the structure compact is a problem.

Disclosure of Invention

It is an object of the present application to provide an integrated assembly to simplify installation and to be more compact.

In order to achieve the purpose, the following technical scheme is adopted in the application: an integrated component comprising a first one-way valve, a connecting portion and a reservoir portion, the connecting portion and the reservoir portion being connected as a whole, the connecting portion having a bore, the integrated component having a reservoir, the bore comprising a first bore and a second bore, the first bore and the second bore being arranged independently, the first bore comprising a first inlet and a first outlet, a working medium entering the first bore from the first inlet and leaving the first bore through the first outlet; the reservoir cavity can be communicated with the second hole channel, the second hole channel comprises a second outlet, the working medium passing through the reservoir can leave the second hole channel through the second outlet, the connecting part is provided with a third hole channel, the first one-way valve is positioned in the third hole channel and is in limit connection with the connecting part, the working medium enters the reservoir cavity through the first one-way valve, and the first one-way valve can prevent the working medium in the reservoir cavity from leaving the reservoir cavity through the first one-way valve.

The integrated assembly integrates the first check valve and the liquid storage part into a whole through the connecting part, the first check valve is located in a hole channel of the connecting part, the liquid storage part is located on one side of the connecting part, the hole channel is formed in the connecting part, the three communication is achieved, the structure is simple and compact, a connecting pipe does not need to be additionally arranged among the three, and the integrated assembly is assembled with a thermal management system as a whole and is more convenient to assemble.

Drawings

FIG. 1 is a perspective view of a first embodiment of an integrated assembly;

FIG. 2 is a schematic top view of the integrated assembly of FIG. 1;

FIG. 3 is a schematic cross-sectional view I-I of the integrated assembly of FIG. 2;

FIG. 4 is a schematic cross-sectional view A-A of the integrated assembly of FIG. 2;

FIG. 5 is a schematic view of the H-H cross-sectional structure of the integrated assembly of FIG. 2;

FIG. 6 is a perspective view of the joint of FIG. 1;

FIG. 7 is a schematic top view of the connection portion of FIG. 6;

FIG. 8 is a schematic view of the cross-sectional C-C structure of the joint of FIG. 7;

FIG. 9 is a schematic view of a cross-sectional D-D structure of the joint of FIG. 7;

FIG. 10 is a front view of the connection part of FIG. 6;

FIG. 11 is a schematic view of a cross-sectional view B-B of the joint of FIG. 10;

FIG. 12 is a schematic structural view of another embodiment of the integrated assembly of FIG. 5;

FIG. 13 is a perspective view of a second embodiment of an integrated assembly;

FIG. 14 is a schematic top view of the integrated assembly of FIG. 13;

FIG. 15 is a schematic view of the cross-sectional D-D structure of the integrated assembly of FIG. 14;

FIG. 16 is a schematic view of the cross-sectional C-C structure of the integrated assembly of FIG. 14;

FIG. 17 is a front view structural schematic diagram of the integrated assembly of FIG. 13;

FIG. 18 is a schematic view of the cross-sectional B-B structure of the integrated assembly of FIG. 10;

FIG. 19 is a perspective view of the joint of FIG. 13;

FIG. 20 is a schematic top view of the connection portion of FIG. 19;

FIG. 21 is a schematic sectional view taken along line A-A of the joint of FIG. 20;

FIG. 22 is a schematic view of a cross-sectional view B-B of the joint of FIG. 20;

FIG. 23 is a perspective view of a third embodiment of the integrated assembly;

FIG. 24 is a schematic top view of the integrated assembly of FIG. 23;

FIG. 25 is a schematic view of the cross-sectional B-B structure of the integrated assembly of FIG. 24;

FIG. 26 is a schematic view of the cross-sectional E-E structure of the integrated assembly of FIG. 24;

FIG. 27 is a schematic view of the cross-sectional C-C structure of the integrated assembly of FIG. 24;

FIG. 28 is a front view schematic of the integrated assembly of FIG. 23;

fig. 29 is a schematic view of a-a cross-section of the integrated assembly of fig. 28.

Detailed Description

The invention will be further described with reference to the following figures and specific examples:

the integrated assembly of the present application can be used in a vehicle thermal management system, where the vehicle may be a new energy vehicle, and referring to fig. 1-29, the integrated assembly 100 includes a connecting portion 10 and a liquid storage portion 20, the connecting portion 10 and the liquid storage portion 20 are connected as a whole, the connecting portion 10 has a hole, the hole includes a first hole 111 and a second hole 112, the first hole 111 and the second hole 112 are separately provided, the integrated assembly 100 has a liquid storage chamber 30, and the liquid storage chamber 30 can store a liquid working medium; the first hole 111 is formed with a first inlet 1111 and a first outlet 1112 and/or a second outlet 1113 on the outer surface of the wall of the connecting portion 10, the working medium enters the first hole 111 from the first inlet 1111, at least a part of the working medium leaves the first hole 111 through the first outlet 1112 and/or the second outlet 1113, the reservoir 30 can communicate with the second hole 112, the second hole 112 is formed with a third outlet 1121 on the outer surface of the wall of the connecting portion 10, the connecting portion 10 is provided with a mounting seat, and the mounting seat communicates with the first hole 111 or the second hole 112; this enables components in a thermal management system to be located in the mounting seats, where the thermal management system includes components, such as a component including a valve member and a sensor, where the valve member may include a first valve portion, a second valve portion, a first check valve, and a second check valve, and the sensor may include a first temperature sensor and a second temperature sensor; the connecting part 10 in the technical scheme provides a plurality of interfaces and mounting seats for assembling the integrated assembly and the vehicle thermal management system, and is assembled with the liquid storage part to realize the liquid storage function, so that the assembly of the integrated assembly is convenient, and the assembly process is simplified; in addition, the integrated assembly is simple and compact in structure, and a connecting pipe does not need to be additionally arranged. In the following embodiments, the above interfaces include a first inlet 1111, a first outlet 1112, and the following second inlet, third outlet 1121, third inlet, and second outlet 1113, and the mounting seat may include a first mounting seat 41 and a second mounting seat 42. Wherein the first inlet 1111 may be connected to an outlet of a compressor in the thermal management system, the first outlet 1112 may be connected to an inlet of an indoor condenser, the second inlet may be connected to an outlet of the indoor condenser, and the third outlet 1121 may be connected to an inlet of an intermediate heat exchanger; during docking with the system, the connection portion 10 can provide connection support, such as a stud disposed at the interface position, one end of the stud is fixed with the connection portion 10, and the other end of the stud protrudes out of the surface of the connection portion 10, so as to facilitate docking with the pipeline of the system. The connecting portion 10 may include two position restricting portions 1100, and the first outlet 1112 and the second outlet 1113 are formed in the position restricting portions 1100, which can support and restrict the spool 72 of the valve portion.

Referring to fig. 1-12, which are first embodiments of an integrated assembly, in this embodiment, the integrated assembly 100 includes a first valve part 70, a second valve part 80, a connecting part 10 and a reservoir part 20, the connecting part 10 has a hole passage including a first hole passage 111 and a second hole passage 112, the first hole passage 111 and the second hole passage 112 are separately provided, the integrated assembly 100 has a reservoir 30, the first hole passage 111 is formed with a first inlet 1111, a first outlet 1112 and a second outlet 1113 at an outer surface of a wall of the connecting part 10, a working medium enters the first hole passage 111 from the first inlet 1111 and exits the first hole passage 111 through the first outlet 1112 and the second outlet 1113, the reservoir 30 can directly communicate with the second hole passage 112, the second hole passage 112 is formed with a third outlet 1121 at an outer surface of a wall of the connecting part, the connecting part 10 has a mounting seat, the mounting seat includes a first mounting seat 41 and a second mounting seat 42, the first mounting seat 41 and the second mounting seat 42 are both communicated with the first duct 111, or a part of the first valve part 70 is located in the first mounting seat 41 and fixedly connected with the connecting part 10, a part of the second valve part 80 is located in the second mounting seat 42 and fixedly connected with the connecting part 10, the first valve part 70 and the second valve part 80 are two-way valves, and the pressure of the working medium between the first inlet 1111 and the first outlet 1112 can be changed by controlling the first valve part 70; the working medium pressure between the first inlet 1111 and the second outlet 1113 can be varied by controlling the second valve portion 80. Of course, the integrated assembly may also comprise only one valve part, i.e. the first and

second tempering valves

70, 80 as a whole, which valve part is a three-way valve, at least part of which valve part is located in the mounting seat between the first and

second outlets

1112, 1113, and by controlling which valve part the pressure of the working medium in the first duct 111 can be changed.

With reference to fig. 3 to 12, in the present embodiment, the integrated assembly 10 further includes two check valves, namely a first check valve 51 and a second check valve 52, and a temperature sensor, namely a first temperature sensor 61 in the present embodiment.

The connecting portion 10 has a third orifice 113 and a fourth orifice 114, the second inlet 1131 is a port formed by the third orifice 113 on the surface of the wall of the connecting portion 10, the working medium enters the third orifice 113 through the second inlet 1131, and the third orifice 113 communicates with the inlet of the reservoir 30; the first check valve 51 is entirely positioned in the third hole 113, the first check valve 51 is in limit connection with the connecting part 10, and the first check valve 51 can prevent the working medium from reversely flowing from the reservoir 30 to the second inlet 1131; the second check valve 52 is entirely located in the fourth hole 114, the third inlet 1141 is a port formed on the wall surface of the connecting portion 10 of the fourth hole 114, the working medium enters the fourth hole 114 through the third inlet 1141, the fourth hole 114 communicates with the inlet of the reservoir 30, and the second check valve 52 prevents the working medium from reversely flowing from the reservoir 30 to the third inlet 1141.

The sensing head of the first temperature sensor 61 is positioned in the third hole 113, the first temperature sensor 61 is fixedly connected with the connecting part 10, the sensing head of the first temperature sensor 61 is positioned between the second inlet 1131 and the first check valve 51, and the first temperature sensor can detect the temperature of the working medium entering the liquid storage cavity.

To facilitate the assembly connection of the integrated component to the system, the first inlet 1111 and the third outlet 1121 are located on the same side of the connecting portion 10, specifically, the first inlet 1111 and the third outlet 1121 are located at the top of the connecting portion 10 and between the first valve portion 70 and the second valve portion 80, the first outlet 1112 and the second inlet 1131 are located on the same side of the side wall of the connecting portion 10, and the third inlet 1141 and the second outlet 1113 are located on the same side of the side wall of the connecting portion 10; the interfaces of the integrated assembly are arranged pairwise, so that the joints of the heat management system are connected pairwise, and the assembly is convenient.

Referring to fig. 5 and 12, the reservoir 20 includes a liquid collecting tube 21, in fig. 5, the liquid collecting tube 21 is coaxially disposed with the reservoir 30, the liquid collecting tube 21 communicates the reservoir 30 with the second channel 112, the second channel 112 includes a first section 1102 and a second section 1122, the first section 1102 and the second section 1122 are disposed in series, or the first section 1102 and the second section 1122 are disposed in series, wherein the first section 1102 is perpendicular to the liquid collecting tube 21, and the second section 1122 is parallel to the liquid collecting tube 21; in this embodiment, the structure of the liquid collecting tube 21 is relatively simple, the second duct 112 is relatively complex, in this embodiment, the connecting portion 10 may be formed by processing a section bar, in order to process the first section 1102, the first section 1102 is communicated with the periphery of the connecting portion 10, and in order to prevent the working medium from leaking, a plug 91 is provided.

Referring to fig. 12, the liquid collecting tube 21 includes a first sub-portion 211, a second sub-portion 212, and a transition section 213, the first sub-portion 211 and the second sub-portion 212 are disposed in parallel, the first sub-portion 211 and the second sub-portion 212 are connected by the transition section 213, the first sub-portion 211 is disposed coaxially with the liquid storage chamber 30, the liquid collecting tube 21 communicates with the liquid storage chamber 30 and the second duct 112, and the second duct 112 is disposed coaxially with the second sub-portion 212 of the liquid collecting tube.

Referring to fig. 3 and 6, the connecting portion 10 includes a cylindrical portion 12 and a main body portion 13, the main body portion 13 has the above hole channels, the cylindrical portion 12 extends downward from the main body portion 13, the liquid storage portion 20 has a housing 24, the housing 24 is welded and sealed with the cylindrical portion 12, the inner periphery of the cylindrical portion 12 forms a first portion 31 of the liquid storage chamber 30, the housing 24 forms a second portion 32 of the liquid storage chamber 30, and the welding seam between the housing 24 and the cylindrical portion 12 is set at a distance from the main body portion, so that the influence of the heat of welding on the mounting components of the connecting portion 10 can be avoided, wherein the mounting components include a first check valve, a second check valve and a first temperature sensor. The third and

fourth channels

113 and 114 are formed at the inlet of the reservoir 30 between the central axis of the reservoir 30 and the inner wall of the cylindrical portion 12, and specifically, the third and

fourth channels

113 and 114 are formed at the inlet of the reservoir 30 at a position half the central axis of the reservoir 30 and the inner wall of the cylindrical portion 12.

Referring to fig. 3 and 8, the first hole 111 is not communicated with the first portion of the reservoir 30 formed by the cylindrical portion 12, referring to fig. 3 and 9, the working medium can enter the first portion 31 of the reservoir 30 formed by the cylindrical portion 12 through the third hole 113 from the second inlet 1131, and the working medium can enter the first portion of the reservoir 30 formed by the cylindrical portion 12 through the fourth hole 114 from the third inlet 1141, referring to fig. 11, the central axes of the first hole 111, the third hole 113 and the fourth hole 114 are located at the same horizontal plane of the connecting portion 10, which may be a cross section as shown in the figure, so as to facilitate the use of the same processing standard.

In the present embodiment, each of the first valve portion 70 and the second valve portion 80 includes a driving portion 71 and a valve core 72, the valve core 72 is in a spherical shape, the valve core 72 has a valve core passage 721, the driving portion 71 can drive the valve core 72 to rotate, the valve core passage 721 enables the first hole passage 111 to communicate, of course, the working medium pressure in the first hole passage 111 can be adjusted by adjusting the flow areas of the valve core passage 721 and the first hole passage 111, and the on-off state of the first hole passage 111 can be adjusted. One valve part can be adopted, and a three-way ball valve is selected.

Referring to fig. 13-22, a second embodiment of the integrated assembly, compared to the first embodiment, mainly differs in that: the reservoir 20 further includes a cover 22, the housing 24 is hermetically connected to the cover 22, the reservoir 30 is located between the housing 24 and the cover 22, the connecting portion 10 is hermetically connected to the cover 22, the cover 22 has a first inlet channel 221 and an outlet channel 222, the reservoir 30 can be communicated with the second opening 112 through the outlet channel 222, and the second inlet 1131 is a port formed on the upper surface of the cover 22 by the first inlet channel 221; the cover 22 further has a second inlet channel (not shown) having the same structure as the first inlet channel 221, and the third inlet 1141 is a port formed on the upper surface of the cover 22 by the second inlet channel.

In this embodiment, the cover 22 is inserted into the connecting portion 10 and fixed, and then welded and fixed; connecting portion 10 is located on one side of central axis O-O of reservoir 30, outlet channel 222 comprises a first sub-section 2221, a second sub-section 2222 and a third sub-section 2223, first sub-section 2221 is communicated with reservoir 30, second sub-section 2222 is located between first sub-section 2221 and third sub-section 2223, the central axis of first sub-section 2221 is coaxially arranged with central axis O-O of reservoir 30, the central axis of third sub-section 2223 is arranged in parallel with the central axis of reservoir 30, and the central axis of second sub-section 2222 is arranged perpendicular to the central axis of reservoir 30; due to the limitation of the cross-sectional location in fig. 15, the first sub-section 2221 and the second sub-section 2222 are indicated by dashed lines; the cover body 22 is formed by processing a section bar, the liquid collecting pipe 21 is simple in structure, and the combination and processing of the cover body and the liquid collecting pipe are relatively easy.

The first check valve 51 is positioned in the first inlet channel 221 and is connected to the cover 22, the first inlet channel 221 is connected to the reservoir 30, the cover 22 further has a second inlet channel, and the second check valve (not shown) is positioned in the second inlet channel and is connected to the cover 22, and the second inlet channel is connected to the reservoir 30.

In this embodiment, the temperature sensor is a second temperature sensor 62, an inductive head of the second temperature sensor 62 is located in the second duct 112, and the second temperature sensor 62 is fixedly connected to the connecting portion 10; specifically, the sensing head of the second temperature sensor 62 is adjacent to the third outlet 1121, and the second temperature sensor is capable of detecting the temperature of the working medium at the outlet of the reservoir.

Referring to fig. 15-22, the connecting portion 10 has a first inlet 1111, a first bore 111, a second bore 112, a first mounting seat 41, and a second mounting seat 42, the first bore 111 includes a first outlet 1112 and a second outlet 1113, the second bore 112 includes a third outlet 1121, a second inlet 1131, and a third inlet 1141 is located on the cover 22, the working medium enters the first bore 111 from the first inlet 1111 and exits the first bore 111 through the first outlet 1112 and the second outlet 1113, the first valve portion 70 is located on the first mounting seat 41, and the second valve portion 80 is located on the second mounting seat 42, and the pressure of the working medium between the first inlet 1111 and the first outlet 1112 can be changed by controlling the first valve portion 70; the pressure of the working medium between the first inlet and the second outlet can be varied by controlling the second valve part 8; the working medium enters the reservoir 30 through the second inlet 1131 and the third inlet 1141, and the working medium in the reservoir 30 enters the second hole 112 through the liquid collecting tube 21 and the outlet channel 222 and leaves the second hole 112 through the third outlet 1121.

For weight reduction, the connecting portion 10 has a hollowed-out portion 19 between the second bore 112 and the first bore 111 and between the second bore 112 and the mounting seat.

Referring to fig. 23-29, a third embodiment of the integrated assembly is mainly different from the first embodiment in that: the reservoir 20 further includes a cover 22, the housing 24 is hermetically connected to the cover 22, the reservoir 30 is located between the housing 24 and the cover 22, the connecting portion 10 is hermetically connected to the cover 22, the connecting portion 10 is engaged with the cover 22 and welded to the cover 22, the cover 22 has a through hole 201, and the third channel 113 and the fourth channel 114 are communicated with the reservoir 30 through the through hole 201. In this embodiment, the sensor includes a first temperature sensor 61 and a second temperature sensor 62, the sensing head of the first temperature sensor 61 is located in the third hole 113, the first temperature sensor 61 is fixedly connected to the connecting portion 10, the sensing head of the first temperature sensor 61 is located between the second inlet 1131 and the first check valve, the sensing head of the second temperature sensor 62 is located in the second hole 112, and the second temperature sensor 62 is fixedly connected to the connecting portion 10; specifically, the sensing head of the second temperature sensor 62 is adjacent to the third outlet 1121, and in this embodiment, the third outlet 1121 is located on the periphery of the connecting portion 10, referring to fig. 27, the connecting portion 10 includes a protrusion 15, the third outlet 1121 is located on the protrusion, or the second aperture 112 forms the third outlet 1121 on the outer surface of the protrusion 15, so that the protrusion can be used to cooperate with other components of the system, and the positioning is more accurate.

It should be noted that: although the present invention has been described in detail with reference to the above-mentioned embodiments, it should be understood by those skilled in the art that the present invention may be modified and equivalents may be substituted for those skilled in the art, and all technical solutions and modifications that do not depart from the spirit and scope of the present invention should be covered by the claims of the present invention.

Claims

1. An integrated component comprising a first one-way valve, a connecting portion and a reservoir portion, the connecting portion being integrally connected to the reservoir portion, the connecting portion having a bore, the integrated component having a reservoir, the bore comprising a first bore and a second bore, the first bore being independent of the second bore, the first bore comprising a first inlet and a first outlet, a working medium entering the first bore from the first inlet and exiting the first bore through the first outlet; the reservoir cavity can be communicated with the second hole channel, the second hole channel comprises a second outlet, the working medium passing through the reservoir can leave the second hole channel through the second outlet, the connecting part is provided with a third hole channel, the first one-way valve is positioned in the third hole channel and is in limit connection with the connecting part, the working medium enters the reservoir cavity through the first one-way valve, and the first one-way valve can prevent the working medium in the reservoir cavity from leaving the reservoir cavity through the first one-way valve.

2. The integrated assembly of claim 1, wherein: the connecting portion includes a cylindrical portion having the orifice and a main body portion extending downward from the main body portion, an inner periphery of the cylindrical portion forms a first portion of the reservoir, the reservoir portion has a reservoir housing forming a second portion of the reservoir, and the reservoir housing is welded and sealed to the cylindrical portion.

3. The integrated assembly of claim 1, wherein: the liquid storage part comprises a liquid storage shell and a liquid storage cover body, the liquid storage shell is hermetically connected with the liquid storage cover body, the liquid storage cavity is positioned between the liquid storage shell and the liquid storage cover body, the connecting part is hermetically connected with the liquid storage cover body, and the liquid storage cavity can be communicated with the second pore channel.

4. An integrated assembly according to claim 2 or 3, wherein: the integrated assembly has a second inlet located in the third aperture passage through which the working medium enters the third aperture passage, the third aperture passage communicating with the inlet of the reservoir; the first one-way valve is located in the third hole channel, and the first one-way valve is fixedly connected with the connecting portion.

5. The integrated assembly of claim 4, wherein: the integrated assembly is provided with a third inlet, the connecting part is provided with a fourth pore passage, the third inlet is positioned in the fourth pore passage, the working medium enters the fourth pore passage through the third inlet, and the fourth pore passage is communicated with the inlet of the liquid storage cavity; the integrated assembly further comprises a second one-way valve, the second one-way valve is located in the fourth hole, and the second one-way valve is fixedly connected with the connecting portion.

6. The integrated assembly of claim 5, wherein: the integrated assembly further comprises a first temperature sensor, an induction head of the first temperature sensor is located in the third hole channel, and the first temperature sensor is fixedly connected with the connecting portion.

7. The integrated assembly of any of claims 1-6, wherein: the liquid storage part comprises a liquid collecting pipe, the liquid collecting pipe and the liquid storage cavity are coaxially arranged, the liquid collecting pipe is communicated with the liquid storage cavity and the second pore channel, the second pore channel comprises a first section and a second section, the first section and the second section are arranged in a penetrating mode, the first section is perpendicular to the liquid collecting pipe, and the second section is parallel to the liquid collecting pipe.

8. The integrated assembly of any of claims 1-6, wherein: the liquid storage part comprises a liquid collecting pipe, the liquid collecting pipe comprises a first section, a second section and a transition section, the first section and the second section are arranged in parallel, the first section and the second section are connected through the transition section, the first section and the liquid storage cavity are coaxially arranged, the liquid collecting pipe is communicated with the liquid storage cavity and a second pore channel, and the second pore channel and the second section of the liquid collecting pipe are coaxially arranged.

9. The integrated assembly of claim 7 or 8, wherein: the integrated assembly further comprises a first valve portion located at least partially in the first bore and between the first inlet and the first outlet, the pressure of the working medium in the first bore being variable by control of the valve portion, and a second valve portion located in the first bore and between the first inlet and the third outlet, the first inlet and the second outlet being located at the top of the connecting portion and between the two valve portions, a set of the first outlet and the second inlet being located on the same side of a side wall of the connecting portion.