CN218118658U

CN218118658U - Combination valve, valve terminal and refrigerating system

Info

Publication number: CN218118658U
Application number: CN202222447675.3U
Authority: CN
Inventors: 阚望; 区永东; 尚凯锋; 廖四清; 曾令华; 卢耀汕; 律刚; 丁婧姝; 杨茂; 苏健; 刘振超
Original assignee: Guangdong Welling Motor Manufacturing Co Ltd
Current assignee: Guangdong Welling Motor Manufacturing Co Ltd
Priority date: 2022-09-14
Filing date: 2022-09-14
Publication date: 2022-12-23
Anticipated expiration: 2032-09-14

Abstract

The utility model discloses a combination valve, valve island and refrigerating system, wherein the combination valve includes valve seat, first valve and check valve, and the inside of valve seat is provided with first runner and second runner, and the second runner has first port and second port, and the one end that the second runner is connected with the first runner forms the first port, and the other end that the second runner is connected with the first runner forms the second port, and the valve seat is provided with the mounting hole, and the mounting hole communicates the second runner; the first valve is arranged in the mounting hole; the check valve is located in the first flow passage, and the first port and the second port are located on both sides of the check valve. The combination valve integrates the first valve and the one-way valve into the valve seat, and the first valve and the one-way valve are connected in parallel by the first flow passage and the second flow passage inside the valve seat, so that the combination valve is compact in structure, greatly reduces the occupied space, improves the product manufacturability, reduces the cost, and is favorable for being applied to a refrigeration system.

Description

Combination valve, valve terminal and refrigerating system

Technical Field

The utility model relates to the technical field of valves, in particular to combination valve, valve terminal and refrigerating system.

Background

In the related art, part of the refrigeration systems need to realize the flow path through the throttle valve, but the throttle valve still has a large flow resistance under the condition of full opening, and the flow passing through the throttle valve is limited, so that a flow path structure in which the throttle valve and the one-way valve are connected in parallel needs to be designed, a complicated flow path needs to be designed to realize the parallel connection of the throttle valve and the one-way valve, and the defects of large occupied space, heavy weight, high cost, inconvenience in installation and the like exist.

SUMMERY OF THE UTILITY MODEL

The utility model discloses aim at solving one of the technical problem that exists among the prior art at least. Therefore, the utility model provides a combination valve, compact structure, manufacturability are good, are favorable to reduce cost.

The utility model discloses provide the valve terminal and the refrigerating system who use above-mentioned combination valve simultaneously.

According to the utility model discloses combination valve of first aspect embodiment, including valve seat, first valve and check valve, the inside of valve seat is provided with first runner and second runner, the second runner has first port and second port, the one end that the second runner is connected with the first runner forms the first port, the other end that the second runner is connected with the first runner forms the second port, the valve seat is provided with the mounting hole, the mounting hole communicates the second runner; the first valve is arranged in the mounting hole; the check valve is located in the first flow passage, and the first port and the second port are located on both sides of the check valve.

According to the utility model discloses combination valve of first aspect embodiment has following beneficial effect at least: when the function of the first valve is used, the flow of the second flow passage can be controlled through the first valve, and at the moment, the one-way valve is in a closed state to cut off the first flow passage; when large-flow circulation is needed, the check valve is opened, large-flow circulation is achieved through the first flow passage, and the first valve can be closed or opened according to actual requirements. The first valve and the one-way valve are integrated on the valve seat, the first flow channel and the second flow channel inside the valve seat are used for realizing the parallel connection of the first valve and the one-way valve, the structure is compact, the occupied space is greatly reduced, the product manufacturability is improved, the cost is reduced, and the application to a refrigeration system is facilitated.

According to some embodiments of the first aspect of the present invention, the first valve is a throttle valve or an on-off valve.

According to some embodiments of the first aspect of the present invention, the throttle valve comprises a seal seat and a valve needle, the seal seat is installed in the second flow channel, and the valve needle is installed in the inner flow channel of the seal seat.

According to some embodiments of the first aspect of the present invention, the throttle valve is a thermostatic expansion valve, an electronic expansion valve or a ball float valve.

According to some embodiments of the first aspect of the present invention, the first port and the second port are disposed on an inner wall of the first flow passage.

According to some embodiments of the first aspect of the present invention, the second flow channel comprises a cylindrical cavity and a first auxiliary flow channel, the cylindrical cavity the first auxiliary flow channel and the mounting hole are coaxially arranged and communicated, and the second port is located the first auxiliary flow channel is communicated with one end of the first flow channel.

According to some embodiments of the first aspect of the present invention, the second flow channel further comprises a second auxiliary flow channel, the first flow channel is arranged in a straight line and runs through the valve seat, and the second auxiliary flow channel communicates the first flow channel with the cylindrical cavity.

According to the utility model discloses some embodiments of first aspect, the second is assisted the runner and is arranged for the slope, the axis that the second was assisted the runner with the contained angle that the axis of first runner formed is the acute angle.

According to some embodiments of the first aspect of the present invention, the check valve includes a base, the base is fixedly connected and sealed with an inner wall of the first flow passage, the first flow passage has a third port and a fourth port, and a diameter of the fourth port is greater than a diameter of the base.

According to the utility model discloses some embodiments of first aspect, the diameter of third port is less than the diameter of base, the inner wall of first runner is provided with the mounting groove, the base install in the mounting groove, the outer wall of base is provided with first sealing washer with the cooperation the lateral wall of mounting groove realizes sealedly.

According to the utility model discloses some embodiments of first aspect, the inner wall of first runner is provided with the jump ring groove, the dress is equipped with the jump ring in the jump ring groove, the jump ring with the lateral wall cooperation of mounting groove is injectd the base.

According to the utility model discloses some embodiments of the first aspect, the check valve is still including the valve rod, the base is provided with the main entrance, the inner wall of main entrance is provided with the step face, the valve rod wears to locate the main entrance to be provided with the cooperation the sealed face of step face, the valve rod is connected with the spring, the both ends of spring are connected respectively the base reaches the valve rod.

According to the utility model discloses valve island of second aspect embodiment, including the base and as the first aspect embodiment the combination valve, the combination valve connect in the base.

According to a third aspect embodiment of the present invention, a refrigeration system comprises the combination valve as described in the first aspect embodiment.

Additional aspects and advantages of the invention will be set forth in part in the description which follows and, in part, will be obvious from the description, or may be learned by practice of the invention.

Drawings

Additional aspects and advantages of the present invention will become apparent and readily appreciated from the following description of the embodiments, taken in conjunction with the accompanying drawings of which:

fig. 1 is a schematic structural diagram of a combination valve according to an embodiment of the present invention;

fig. 2 is a schematic structural diagram of another view angle of the combination valve according to the embodiment of the first aspect of the present invention;

FIG. 3 is a cross-sectional view of a combination valve in accordance with an embodiment of the first aspect of the present invention;

FIG. 4 is an enlarged view of a portion of FIG. 3 at A;

fig. 5 is a schematic structural view of a valve seat in an embodiment of the first aspect of the present invention;

fig. 6 is a cross-sectional view of a valve seat in an embodiment of the first aspect of the invention;

fig. 7 is a schematic structural diagram of a valve island according to an embodiment of the present invention;

fig. 8 is a partial cross-sectional view of a valve island in accordance with an embodiment of the second aspect of the present invention.

The reference numbers are as follows:

the valve seat 100, the first flow passage 110, the third port 111, the fourth port 112, the mounting groove 113, the snap spring groove 114, the second flow passage 120, the first port 121, the second port 122, the cylindrical cavity 123, the first auxiliary flow passage 124, the second auxiliary flow passage 125, and the mounting hole 130;

the first valve 200, the valve body 210, the valve needle 220, the rotor assembly 230, the stator assembly 240, the seal seat 250, the second seal ring 251, the inner flow passage 252 and the flat flow passage 253;

the check valve 300, a base 310, a first sealing ring 311, a main channel 312, a sleeve 313, a valve rod 320, a retaining ring 321 and a spring 330;

a base 400.

Detailed Description

Reference will now be made in detail to embodiments of the present invention, examples of which are illustrated in the accompanying drawings, wherein like reference numerals refer to the same or similar elements or elements having the same or similar function throughout. The embodiments described below with reference to the drawings are exemplary only for the purpose of explaining the present invention, and should not be construed as limiting the present invention.

In the description of the present invention, it should be understood that the orientation or positional relationship indicated with respect to the orientation description, such as up, down, front, rear, left, right, etc., is based on the orientation or positional relationship shown in the drawings, and is only for convenience of description and simplification of description, and does not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus, should not be construed as limiting the present invention.

In the description of the present invention, if there are first and second descriptions for distinguishing technical features, they are not interpreted as indicating or implying relative importance or implicitly indicating the number of indicated technical features or implicitly indicating the precedence of the indicated technical features.

In the description of the present invention, unless there is an explicit limitation, the words such as setting, installation, connection, etc. should be understood in a broad sense, and those skilled in the art can reasonably determine the specific meanings of the above words in combination with the specific contents of the technical solution.

In the related art, the throttle valve in the refrigeration system mainly functions to throttle the refrigerant to reduce the refrigerant to the evaporation pressure and the evaporation temperature, and simultaneously regulate the flow rate of the refrigerant entering the evaporator. In some special conditions, the refrigeration system needs to realize the flow path full-pass flow through the throttle valve, but the throttle valve still has a large flow resistance under the condition of full opening, and the flow rate passing through the throttle valve is limited, so a flow path structure in which the throttle valve and the check valve are connected in parallel is usually designed to realize the flow path full-pass flow. Complicated flow paths need to be designed to realize the parallel connection of the two, and the defects of large occupied space, heavy weight, high production cost, inconvenience in installation and the like exist.

Therefore, the embodiment of the utility model provides a combination valve, can be integrated as an organic whole with choke valve and check valve, reduce the space by a wide margin and occupy, the equipment of being convenient for, reduction in production cost.

Referring to fig. 1 to 4, a combination valve provided in an embodiment of a first aspect of the present invention includes a valve seat 100, a first valve 200, and a check valve 300, where the first valve 200 and the check valve 300 are all integrated on the valve seat 100, the first valve 200 may be a throttle valve or an on-off valve, and the first valve 200 is described below by taking the throttle valve as an example, a first flow passage 110 and a second flow passage 120 are disposed inside the valve seat 100, a mounting hole 130 is disposed on an outer wall of the valve seat 100, the mounting hole 130 is generally located on an upper end surface of the valve seat 100, the mounting hole 130 is communicated with the second flow passage 120, the first valve 200 is mounted in the mounting hole 130, and the first valve 200 extends to the second flow passage 120, and the first valve 200 can adjust a flow rate of the second flow passage 120 and cut off the second flow passage 120, so as to realize throttling or cutting off a refrigerant, and meet a use requirement of a refrigeration system; the check valve 300 is mounted on the valve seat 100 and positioned in the first flow passage 110, and the check valve 300 can perform one-way flow and shutoff of the first flow passage 110. It can be understood that the second flow passage 120 has a first port 121 and a second port 122, the first port 121 and the second port 122 are both communicated with the first flow passage 110, so as to realize that the second flow passage 120 is communicated with the first flow passage 110, the first port 121 and the second port 122 are positioned at two sides of the check valve 300, and the parallel connection of the check valve 300 and the first valve 200 is realized through the second flow passage 120 and the first flow passage 110 inside the valve seat 100, so that the combined valve has small volume and compact structure, and is convenient to be assembled into a refrigeration system.

It will be appreciated that the first port 121 and the second port 122 are disposed on the inner wall of the first flow passage 110, which facilitates machining of the second flow passage 120 and reduces the volume of the valve seat 100.

It can be understood that, the combination valve integrates the check valve 300 and the first valve 200 into the valve seat 100 to form an integrated combination valve, which has a throttling function and a one-way full-through function, when the throttling function is used, the flow of the second flow passage 120 is controlled by the first valve 200, at this time, the check valve 300 is in a closed state, and the first flow passage 110 is cut off, so as to meet the normal operation requirement of the refrigeration system; when large-flow circulation is needed, the check valve 300 is opened, the large-flow circulation is realized through the first flow passage 110, the first valve 200 can be closed or opened according to actual requirements, and the first valve 200 is fully opened to play a role in assisting the circulation, so that the flow is further increased. The check valve 300 and the first valve 200 can be closed at the same time, so that the circuit is broken, and the flow of the refrigerant is cut off.

The first valve 200 and the one-way valve 300 are integrally installed on the valve seat 100, the first flow channel 110 and the second flow channel 120 inside the valve seat 100 are used for achieving parallel connection of the first valve 200 and the one-way valve 300, an external flow channel is replaced, the structure is compact, occupied space is greatly reduced, assembly inside a refrigeration system (such as an air conditioner) is facilitated, the installation mode is simple, only the valve seat 100 needs to be fixed, and then a pipe is connected, so that the production steps are simplified, and the production cost is reduced. Moreover, the check valve 300 and the first valve 200 are both installed on the valve seat 100, and the pre-assembly is of an integrated structure, so that the product manufacturability is greatly improved, the cost is reduced, and the transportation and the assembly are facilitated.

Referring to fig. 4 to 6, it can be understood that the second flow passage 120 includes a cylindrical cavity 123 and a first auxiliary flow passage 124, the cylindrical cavity 123, the first auxiliary flow passage 124 and the mounting hole 130 are coaxially arranged and communicate, and the second port 122 is located at one end of the first auxiliary flow passage 124 communicating with the first flow passage 110. Install first valve 200 in mounting hole 130, first valve 200 can directly stretch into the cylindricality chamber 123 and the first auxiliary flow channel 124 of coaxial arrangement, simple structure, and the assembly is convenient, is favorable to reduction in production cost. In addition, the cylindrical cavity 123, the first auxiliary runner 124 and the mounting hole 130 are coaxially arranged, and in the machining process, the cylindrical cavity 123, the first auxiliary runner 124 and the mounting hole 130 can be machined and finished through a lathe, so that the manufacturing cost of the valve seat 100 is reduced; and cylindrical cavity 123, first auxiliary flow channel 124 and mounting hole 130 are the coaxial arrangement, are favorable to improving the axiality, and first valve 200 installs the back, helps satisfying the leakproofness, reduces the risk of leaking.

Referring to fig. 4 to 6, it can be understood that the second flow passage 120 further includes a second auxiliary flow passage 125, the first flow passage 110 is linearly arranged and penetrates through the valve seat 100, the second auxiliary flow passage 125 communicates the first flow passage 110 and the cylindrical cavity 123, and the first flow passage 110 has a larger diameter than the second flow passage 120, so as to meet the requirement of large flow.

It is understood that the second auxiliary flow passage 125 is obliquely arranged, and the axis of the second auxiliary flow passage 125 forms an acute angle with the axis of the first flow passage 110. Because the first flow passage 110 is arranged in a straight line and penetrates through the valve seat 100, in the machining operation of the valve seat 100, a drill enters from a port of the first flow passage 110, and then the cylindrical cavity 123 is drilled in an inclined manner to be directly communicated, namely, the second auxiliary flow passage 125 is formed, the machining is simple, the efficiency is high, and the manufacturing cost of the valve seat 100 is reduced.

Of course, the second auxiliary runner 125 may also be perpendicular to the first runner 110, and the cylindrical cavity 123 has a larger cross-sectional area, so that a hole is drilled from the cylindrical cavity 123 to the first runner 110, thereby facilitating the processing.

Referring to fig. 4, it can be understood that the first valve 200 employing the throttle valve includes a valve body 210, a valve needle 220, a rotor assembly 230, a stator assembly 240, and a seal seat 250, the valve needle 220 is in threaded connection with the valve body 210, the valve needle 220 is inserted into an inner flow passage 252 of the seal seat 250, the rotor assembly 230 is connected with the valve needle 220, and the stator assembly 240 is located outside the rotor assembly 230. The stator assembly 240 is energized to generate a magnetic field, the rotor assembly 230 is driven to rotate by the magnetic field, the rotor assembly 230 drives the valve needle 220 to rotate, and the valve body 210 is fixed in the axial direction of the valve needle 220, so that the rotation of the valve needle 220 is converted into the movement in the axial direction, and the relative position of the valve needle 220 and the sealing seat 250 is adjusted, thereby achieving the purpose of adjusting the flow rate and the pressure.

The sealing seat 250 is installed in the cylindrical cavity 123 and the first auxiliary flow passage 124, the outer wall of the sealing seat 250 is provided with a second sealing ring 251, and the sealing between the sealing seat 250 and the valve seat 100 is realized through the second sealing ring 251, so as to prevent the refrigerant from leaking. The valve needle 220 is inserted into the inner flow passage 252 of the sealing seat 250, the valve needle 220 and the inner flow passage are coaxially arranged, the valve needle 220 is provided with a tapered surface, and the tapered surface and the port of the inner flow passage 252 can be closed, so that the flow passage is blocked. When the valve needle 220 moves along the axial direction, the distance between the tapered surface of the valve needle 220 and the port of the inner flow passage 252 is adjusted, that is, the flow path is adjusted, so that the throttling function is realized.

It can be understood that the seal holder 250 is provided with a flat flow passage 253, the flat flow passage 253 communicates the cylindrical cavity 123 with the inner flow passage 252, and considering that the diameter of the cylindrical cavity 123 is larger than that of the seal holder 250, an annular space is formed outside the seal holder 250, so that the flat flow passage 253 has a cross structure with four ports communicating with the cylindrical cavity 123, thereby facilitating the flow of the refrigerant and reducing the resistance.

It should be understood that when the first valve 200 is a throttle valve, the throttle valve can be selected from a thermostatic expansion valve, an electronic expansion valve or a ball float valve, and the purpose of throttling can be achieved.

Referring to fig. 4 to 6, it can be understood that the check valve 300 includes a base 310, the base 310 is fixedly connected and sealed with an inner wall of the first flow passage 110, the first flow passage 110 is generally circular in cross section, the base 310 is cylindrical to fit the first flow passage 110, the first flow passage 110 has three ports 111 and a fourth port 112 at two ends, the fourth port 112 has a diameter larger than that of the base 310 to allow the base 310 to be inserted into the first flow passage 110, and the third port 111 has a diameter smaller than that of the base 310, a shoulder may be formed on the inner wall of the first flow passage 110 to define the base 310, and a flow direction in which the check valve 300 is opened is designed to be the fourth port 112 to the third port 111, so that the base 310 is prevented from being displaced by pushing of a refrigerant, and the use reliability is improved.

It can be understood that the inner wall of the first flow channel 110 is provided with the mounting groove 113, the base 310 is mounted in the mounting groove 113, the bottom wall of the mounting groove 113 is a circular ring surface, the outer wall of the base 310 is provided with the first sealing ring 311, and the first sealing ring 311 abuts against the bottom wall of the mounting groove 113 to realize sealing, so as to prevent the refrigerant from leaking.

Referring to fig. 4 to 6, it can be understood that the inner wall of the first flow passage 110 is provided with a clamp spring groove 114, a clamp spring (not shown) is installed in the clamp spring groove 114, one side of the base 310 abuts against the side wall of the installation groove 113, the other side abuts against the clamp spring, the base 310 is defined by the clamp spring and the side wall of the installation groove 113, the axial position of the base 310 in the first flow passage 110 is fixed, and the base is not pushed by the refrigerant, thereby improving the use reliability.

Referring to fig. 3 and 4, it can be understood that the check valve 300 further includes a valve stem 320, the base 310 is provided with a main passage 312, the inner wall of the main passage 312 is provided with a step surface, the valve stem 320 is inserted into the main passage 312, the valve stem 320 is provided with a sealing surface matching the step surface, the valve stem 320 is connected with a spring 330, two ends of the spring 330 are respectively connected with the base 310 and the valve stem 320, and the sealing surface of the valve stem 320 is kept in contact with the step surface under the action of the spring 330, so as to cut off the first flow passage 110.

It can be understood that, when the first valve 200 performs the throttling function, the refrigerant enters from the third port 111, flows through the second flow passage 120, finally flows out from the fourth port 112, and is throttled by the first valve 200, the third port 111 is on the high pressure side, the fourth port 112 is on the low pressure side, the pressure difference acts on the valve stem 320, the sealing surface of the valve stem 320 is urged to be attached to the step surface, the check valve 300 is in the closed state, and the first flow passage 110 is cut off. When the refrigerant flows in from the fourth port 112, the refrigerant applies a pushing force to the valve stem 320, thereby compressing the spring 330, so that the sealing surface of the valve stem 320 and the step surface are shunted, and the check valve 300 is in an open state, and can perform a large flow circulation.

The base 310 is provided with a sleeve 313, the main channel 312 penetrates through the sleeve 313, the spring 330 is sleeved on the outer wall of the sleeve 313, the end part of the valve rod 320 is provided with a stop ring 321, the spring 330 abuts against the stop ring 321, the stop ring 321 is further provided with a coaming to limit the spring 330, the situation that the spring 330 is clamped due to deviation is prevented, and the use reliability is improved.

Referring to fig. 7 and 8, a second embodiment of the present invention provides a valve island, which includes a base 400 and a combination valve of the first embodiment, wherein the combination valve is mounted on the base 400. As shown in fig. 7, a base 400 may be provided with a plurality of valves to form a multifunctional valve island, and the valve island may be applied to a refrigeration system, or may be applied to a thermal management system and an air conditioning system of a new energy vehicle. As shown in fig. 8, the base 400 is provided with a mounting groove, the valve seat 100 of the combination valve is installed in the mounting groove to be fixedly connected, a flow passage is provided inside the base 400 to communicate the third port 111 and the fourth port 112 of the valve seat 100, and various valves are concentrated on the base 400 to realize control and switching of various functions.

The embodiment of the third aspect of the present invention provides a refrigeration system, including the combination valve of the embodiment of the first aspect, the combination valve includes a valve seat 100, a first valve 200 and a check valve 300, the first valve 200 and the check valve 300 are all integrated on the valve seat 100, the inside of the valve seat 100 is provided with a first flow channel 110 and a second flow channel 120, the outer wall of the valve seat 100 is provided with a mounting hole 130, the mounting hole 130 is usually located on the upper end surface of the valve seat 100, the mounting hole 130 communicates with the second flow channel 120, the first valve 200 is installed on the mounting hole 130, and the first valve 200 extends to the second flow channel 120, the flow of the second flow channel 120 can be adjusted and the second flow channel 120 can be cut off through the first valve 200, throttling or cutting off of a refrigerant is realized, and the use requirement of the refrigeration system is met; the check valve 300 is mounted on the valve seat 100 and positioned in the first flow passage 110, and the check valve 300 can perform one-way flow and shutoff of the first flow passage 110.

It can be understood that the second flow passage 120 has a first port 121 and a second port 122, the first port 121 and the second port 122 are both communicated with the first flow passage 110, so as to realize that the second flow passage 120 is communicated with the first flow passage 110, the first port 121 and the second port 122 are positioned at two sides of the check valve 300, and the parallel connection of the check valve 300 and the first valve 200 is realized through the second flow passage 120 and the first flow passage 110 inside the valve seat 100, so that the combined valve has small volume and compact structure, and is convenient to be assembled into a refrigeration system.

The embodiments of the present invention have been described in detail with reference to the accompanying drawings, but the present invention is not limited to the above embodiments, and various changes can be made without departing from the spirit of the present invention within the knowledge scope of those skilled in the art.

Claims

1. A combination valve, comprising:

the valve comprises a valve seat, wherein a first flow passage and a second flow passage are arranged inside the valve seat, the second flow passage is provided with a first port and a second port, one end of the second flow passage, which is connected with the first flow passage, forms the first port, the other end of the second flow passage, which is connected with the first flow passage, forms the second port, and the valve seat is provided with a mounting hole which is communicated with the second flow passage;

the first valve is arranged in the mounting hole;

a check valve located in the first flow passage, the first port and the second port located on either side of the check valve.

2. The combination valve of claim 1, wherein the first valve is a throttle valve or an on-off valve.

3. The combination valve of claim 2, wherein the throttle valve comprises a sealing seat and a needle, the sealing seat is disposed in the second flow passage, and the needle is disposed through an inner flow passage of the sealing seat.

4. The combination valve of claim 2 wherein the throttling valve is a thermostatic expansion valve, an electronic expansion valve or a float valve.

5. The combination valve of claim 1, wherein the first port and the second port are disposed in an inner wall of the first flow passage.

6. The combination valve of claim 1 wherein the second flow passage includes a cylindrical cavity and a first secondary flow passage, the cylindrical cavity, the first secondary flow passage and the mounting bore being coaxially arranged and communicating, the second port being located at an end of the first secondary flow passage communicating with the first flow passage.

7. The combination valve of claim 6, wherein the second flow passage further comprises a second secondary flow passage, the first flow passage being linearly disposed and extending through the valve seat, the second secondary flow passage communicating the first flow passage and the cylindrical cavity.

8. The combination valve of claim 7, wherein the second secondary flow passage is disposed at an angle, and an axis of the second secondary flow passage forms an acute angle with an axis of the first flow passage.

9. The combination valve of claim 1, wherein the one-way valve includes a base fixedly attached to and sealing with an inner wall of the first flow passage, the first flow passage having a third port and a fourth port, the fourth port having a diameter greater than a diameter of the base.

10. The combination valve of claim 9, wherein the diameter of the third port is smaller than that of the base, the inner wall of the first flow passage is provided with a mounting groove, the base is mounted in the mounting groove, and the outer wall of the base is provided with a first sealing ring to match with the side wall of the mounting groove for sealing.

11. The combination valve of claim 10, wherein the inner wall of the first flow passage is provided with a snap spring groove, a snap spring is arranged in the snap spring groove, and the snap spring and the side wall of the mounting groove cooperate to define the base.

12. The combination valve of claim 9, wherein the check valve further comprises a valve stem, the base is provided with a main passage, the inner wall of the main passage is provided with a step surface, the valve stem is arranged in the main passage in a penetrating way and is provided with a sealing surface matched with the step surface, the valve stem is connected with a spring, and two ends of the spring are respectively connected with the base and the valve stem.

13. A valve island comprising a base and a combination valve as claimed in any one of claims 1 to 12, the combination valve being connected to the base.

14. Refrigeration system, characterized in that it comprises a combination valve according to any of claims 1 to 12.