Valve device and refrigeration system

Abstract

The application discloses a valve device and a refrigeration system. The valve device comprises a magnetic conducting unit, a sleeve, a valve seat, a valve core, two hard magnetic components and a plug seat. The sleeve is sleeved on the outer periphery of the valve seat and the plug seat. An inlet hole part is arranged on the sleeve wall. The valve seat and the plug seat are respectively located on the two sides of the central axis of the inlet hole part. An outlet hole part is arranged on the valve seat. The valve seat is connected with the magnetic conducting unit. The valve core is installed between the valve seat and the plug seat and is used for opening and closing the outlet hole part. The two hard magnetic components are respectively installed on the valve seat and the plug seat and are used for attracting the valve core so that the valve core is kept in the position of opening or opening and closing the outlet hole part. The refrigeration system comprises the valve device and a bypass pipeline. The inlet hole part of the valve device is communicated with the refrigerant outlet part of an evaporation assembly. The outlet hole part of the valve device is communicated with the refrigerant inlet part of a compressor. The valve device has low power consumption and can realize opening and closing by using electromagnetic force. In the off state, the valve device is bidirectional blocking. The refrigeration system has low energy consumption.

Description

Technical Field

[0001] This invention relates to the field of refrigeration technology, and in particular to a valve device and a refrigeration system using the valve device. Background Technology

[0002] A refrigeration system typically consists of a compressor, a condenser assembly, a filter, a switching valve, and an evaporator assembly connected in series. The refrigerant outlet of the evaporator assembly is connected to the compressor. The refrigerant flow direction is: compressor → condenser assembly → filter → switching valve → evaporator → compressor.

[0003] Traditional refrigeration systems often have a large temperature difference between the actual temperature and the target temperature in the refrigerator or freezer compartments, and the operating energy consumption of these systems is also high.

[0004] As those skilled in the art, one should try to reduce the energy consumption of the refrigeration system and minimize the temperature difference within the refrigeration system. Summary of the Invention

[0005] To reduce the energy consumption of a refrigeration system, the present invention provides a valve device and a refrigeration system, the refrigeration system including the valve device.

[0006] The valve device provided by the present invention includes an electromagnetic component and a valve component. The electromagnetic component includes a coil unit and a magnetically conductive unit. The valve component includes a sleeve, a valve seat, a valve core, two hard magnetic components, and a plug seat.

[0007] The sleeve is fitted around the valve seat and the plug seat. The sleeve has an inlet hole on its wall. The valve seat and the plug seat are located on opposite sides of the central axis of the inlet hole. The valve seat and the plug seat each have a first end near the inlet hole and a second end away from the inlet hole.

[0008] The first end of the valve seat is provided with an outlet hole, and the first end of the valve seat and the first end of the plug seat are each provided with a sealing surface. The second end of the valve seat and the second end of the plug seat are connected to the magnetic conductive unit; the valve core is installed between the two sealing surfaces.

[0009] The two hard magnetic components are respectively installed at the first end of the valve seat and the first end of the plug seat to attract the valve core and keep the valve core in contact with the sealing surface.

[0010] This valve device can achieve bidirectional closure. It can also remain open or closed during power failure, so it can be powered by pulse power supply, resulting in low power consumption.

[0011] The refrigeration system provided by the present invention includes a compressor, a condenser assembly, a filter, a switching valve, and an evaporator assembly connected in series. The refrigeration system further includes a valve device, which is the valve device described above. The inlet of the valve device is connected to the refrigerant outlet of the evaporator assembly, and the outlet of the valve device is connected to the refrigerant inlet of the compressor.

[0012] This refrigeration system can avoid the following by closing the valve device: after the compressor is turned off, the refrigerant flows back from the compressor to the evaporator and the refrigerant in the evaporator flows to the compressor. Since the power consumption of the valve device is low and the refrigerant is blocked by the valve device in both directions after the compressor is turned off, the energy consumption of the refrigeration system is low. Attached Figure Description

[0013] Figure 1 A cross-sectional view of an embodiment of the valve device provided by the present invention;

[0014] Figure 2 for Figure 1 Schematic diagram of the middle valve seat;

[0015] Figure 3 for Figure 1 Schematic diagram of the middle plug head seat;

[0016] Figure 4 A schematic diagram showing the closure of the left outlet of the valve device;

[0017] Figure 5 A schematic diagram showing the right outlet of the valve device closed;

[0018] Figure 6 A schematic diagram of one embodiment of the refrigeration system provided by the present invention;

[0019] Figure 7 A schematic diagram of another embodiment of the refrigeration system provided by the present invention;

[0020] Figure 8 A schematic diagram of another embodiment of the refrigeration system provided by the present invention;

[0021] The annotations in the attached figures are explained as follows:

[0022] 101 Valve Device;

[0023] 10 valve assembly;

[0024] 11 sleeves, 111 inlet bore;

[0025] 12 Valve seat, 121 Outlet hole, 122 Mounting hole, 123 Flow channel hole, 124 Stepped surface;

[0026] 13 Valve core; 14 Hard magnetic component;

[0027] 15 mounting sleeve, 151 through hole;

[0028] 16 Inlet pipe; 17 Outlet pipe; 18 Plug seat;

[0029] a. end face, b. annular protrusion, c. sealing surface;

[0030] 20 Electromagnetic components;

[0031] 21 Coil frame, 22 Coil, 23 Encapsulation layer, 24 Lead section;

[0032] 25 conductive core, 251 bumps;

[0033] 26 magnetic plate, 261 first connecting hole, 262 second connecting hole;

[0034] 30 casing;

[0035] 31 First through hole section, 32 Second through hole section;

[0036] 100 Refrigeration System:

[0037] 101 Valve assembly, 102 Compressor, 103 Condensation assembly, 104 Filter, 105 Switching valve, 106 Evaporation assembly. Detailed Implementation

[0038] To enable those skilled in the art to better understand the technical solution of the present invention, the technical solution of the present invention will be further described in detail below with reference to the accompanying drawings and specific embodiments.

[0039] In the description of this invention, the orientation or positional relationship indicated by "up", "down", "left", "right", etc., is based on the orientation or positional relationship shown in the accompanying drawings. It is only for the convenience of describing this invention and simplifying the description, and is not intended to indicate or imply that the system or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, it should not be construed as a limitation of this invention.

[0040] like Figure 1 As shown, the valve device includes a valve assembly 10, an electromagnetic assembly 20, and a housing 30, with the main body of the valve assembly 10 and the main body of the electromagnetic assembly 20 located inside the housing 30.

[0041] The valve assembly 10 includes a sleeve 11, a valve seat 12, a valve core 13, two hard magnetic components 14, a mounting sleeve 15, an inlet pipe 16, an outlet pipe 17, and a plug seat 18.

[0042] The sleeve 11 is fitted around the valve seat 12 and the plug seat 18. The sleeve 11 has an inlet hole 111 on its wall. The valve seat 12 and the plug seat 18 are located on both sides of the central axis of the inlet hole 111.

[0043] The mounting sleeve 15 is fitted around the outer periphery of the sleeve 11. The sleeve wall of the mounting sleeve 15 has a through hole 151, which communicates with the inlet hole 111. The inlet pipe 16 is inserted and fixed into the through hole 151, and extends from the first through hole 31 above the cover 30. The mounting sleeve 15 provides a mounting base for the inlet pipe 16, resulting in better installation stability compared to directly fixing the inlet pipe 16 to the sleeve 11.

[0044] Both valve seat 12 and plug seat 18 have a first end near the inlet hole 111 and a second end away from the inlet hole 111. In the figure, for valve seat 12, its right end is the first end and its left end is the second end; for plug seat 18, its left end is the first end and its right end is the second end. Valve seat 12 and plug seat 18 are made of a soft magnetic material that is easily magnetized.

[0045] Combination Figure 2 and Figure 3 As shown, the first end of the valve seat 12 is provided with an outlet hole 121. The first end of both the valve seat 12 and the first end of the plug seat 18 are provided with a sealing surface c for sealing contact with the valve core 13. Specifically, both the first end of the valve seat 12 and the first end of the plug seat 18 are provided with an end face a and an annular protrusion b. The end face a faces towards the valve core 13, and the annular protrusion b protrudes axially from the center region of the end face a towards the valve core 13. The inner circumferential surface of the annular protrusion b of the valve seat 12 encloses and forms the outlet hole 121. The sealing surface c is formed on the inner circumferential surface of the annular protrusion b. In the illustrated scheme, the sealing surface c is an arc-shaped surface, and the valve core 13 has a spherical structure.

[0046] The valve seat 12 has a mounting hole 122 at its second end and a flow channel hole 123 inside. The mounting hole 122 communicates with the outlet hole 121 through the flow channel hole 123. The outlet pipe 17 is inserted and fixed in the mounting hole 122 of the valve seat 12 and extends out from the first through hole 31 on the left side of the cover 30. In the illustrated scheme, the diameter of the mounting hole 122 is larger than the diameter of the flow channel hole 123, thereby forming a stepped surface 124 at the junction of the mounting hole 122 and the flow channel hole 123. The stepped surface 124 can limit the insertion depth of the outlet pipe 17.

[0047] The valve core 13 is installed between the sealing surface c of the valve seat 12 and the sealing surface c of the plug seat 18. The valve core 13 is made of a magnetically attractive material so that it can move left and right under the electromagnetic force of the electromagnetic component 20. Figure 4 As shown, when the valve core 13 moves to its extreme left position, it comes into close contact with the sealing surface c of the valve seat 12 and separates from the sealing surface c of the plug seat 18. At this time, the outlet orifice 121 is closed, and the valve device is shut off. Figure 5As shown, when the valve core 13 moves to the right to its limit position, it comes into close contact with the sealing surface c of the plug seat 18 and separates from the sealing surface c of the valve seat 12. At this time, the outlet hole 121 opens, and the medium flows in from the inlet hole 111 and flows out from the outlet hole 121.

[0048] Two hard magnetic components 14 are respectively installed at the first end of the valve seat 12 and the first end of the plug seat 18. In the illustrated scheme, both hard magnetic components 14 have inner holes, which are fitted onto the outer periphery of the annular protrusion b of the valve seat 12 or the plug seat 18. By providing the hard magnetic components 14, the outlet port 121 of the valve device can remain closed or open in the power-off state. Therefore, the valve device can operate in pulse power supply mode. Specifically, if the valve core 13 is in close contact with the sealing surface c of the valve seat 12 and then the power is cut off, the valve core 13 can remain in close contact with the valve seat 12 under the magnetic attraction of the hard magnetic component 14 on the left, thereby keeping the valve device closed; if the valve core 13 is in close contact with the sealing surface c of the plug seat 18 and then the power is cut off, the valve core 13 can remain in close contact with the plug seat 18 under the magnetic attraction of the hard magnetic component 14 on the right, thereby keeping the valve device open.

[0049] like Figure 1 As shown, the electromagnetic component 20 includes a coil unit and a magnetic conductive unit. The coil unit includes a coil frame 21, a coil 22, an encapsulation layer 23, and a lead portion 24. The magnetic conductive unit includes a magnetic core 25 and two magnetic plates 26.

[0050] Coil 22 is wound around the outer periphery of coil frame 21, and encapsulation layer 23 encapsulates the outer periphery of coil 22. Lead portion 24 is led out from coil 22 and extends from the second through hole 32 on the lower left side of cover 30. Magnetic core 25 is installed in the axial through hole of coil frame 21. The axis of magnetic core 25 is parallel to the axis of sleeve 11.

[0051] Two magnetic plates 26 are respectively limited or fixedly connected to both ends of the magnetic core 25. In the illustrated scheme, each of the two magnetic plates 26 is provided with a first connecting hole 261, and each end of the magnetic core 25 is provided with a protrusion 251. The protrusions 251 at both ends are respectively interference-fitted with the first connecting holes 261 on the two magnetic plates 26. Of course, in actual implementation, the connection structure between the magnetic plates 26 and the magnetic core 25 is not limited to this. Any structure that can fix the relative position of the magnetic plates 26 and the magnetic core 25 is acceptable.

[0052] The two magnetic plates 26 are also respectively limited or fixedly connected to the second end of the valve seat 12 and the second end of the plug seat 18. In the illustrated scheme, the two magnetic plates 26 are provided with second connecting holes 262. The second end of the valve seat 12 is interference-fitted with the second connecting hole 262 on the left magnetic plate 26, and the second end of the plug seat 12 is interference-fitted with the second connecting hole 262 on the right magnetic plate 26. Of course, in actual implementation, the connection structure between the magnetic plates 26 and the valve seat 12 and the plug seat 18 is not limited to this. Any structure that can fix the relative positions of the magnetic plates 26, the valve seat 12, and the plug seat is acceptable.

[0053] Specifically, the sleeve 11 and valve seat 12, the sleeve 11 and plug seat 18, the mounting sleeve 15 and sleeve 11, the inlet pipe 16 and mounting sleeve 15, and the outlet pipe 17 and valve seat 12 can all be fixed by welding, which is not only firm and reliable but also has good sealing and leak-proof performance.

[0054] Specifically, the minimum nominal diameter of the valve device is preferably not less than 3 mm, and the inlet pressure P of the valve device is preferably in the range of 0.5 MPa ≥ P ≥ 0.1 MPa. When a valve device with this configuration is used in a refrigeration system, it can prevent refrigerant stagnation.

[0055] In application, power is supplied to the electromagnetic component 20 of the valve device 101. The valve seat 12 and the plug seat 18 are magnetized under the conduction of the magnetic core 25 and the magnetic plate 26. The valve core 13 moves to the left or right under the magnetic force of the valve seat 12 (the direction of movement of the valve core 13 is changed by changing the direction of the current), thereby opening or closing the outlet orifice 121. The valve device 101 is powered by a pulse power supply mode, i.e., intermittent power supply. If the power is cut off after the valve core 13 is in close contact with the sealing surface c of the valve seat 12, the valve core 13 can maintain close contact with the valve seat 12 under the magnetic attraction of the hard magnetic component 14 on the left, thus keeping the valve device closed. If the power is cut off after the valve core 13 is in close contact with the sealing surface c of the plug seat 18, the valve core 13 can maintain close contact with the plug seat 18 under the magnetic attraction of the hard magnetic component 14 on the right, thus keeping the valve device open. Since the valve device 101 can operate in pulse power supply mode, the power consumption is low.

[0056] like Figures 6-8 As shown, the refrigeration system 100 includes a compressor 102, a condenser assembly 103, a filter 104, a switching valve 105, and an evaporator assembly 106 connected in series, and also includes a valve device 101. The valve device 101 adopts the valve device described above.

[0057] Specifically, the refrigeration system can be a single-temperature zone refrigeration system (such as...) Figure 6 (as shown) or multi-temperature zone refrigeration system (such as Figure 7 and Figure 8As shown, each temperature zone is controlled by a set of evaporators 1061. The various evaporators 1061 of the multi-temperature zone refrigeration system are connected in parallel.

[0058] The inlet port 111 of valve device 101 is connected to the refrigerant outlet of compressor 102, the outlet port 121 of valve device 101 is connected to the refrigerant inlet of compressor 102, and the outlet port 121 of valve device 101 is connected to the refrigerant outlet of evaporator assembly 106. For multi-temperature zone refrigeration systems, valve device 101 can be connected in series in the branch where a single evaporator 1061 is located (e.g., Figure 8 As shown), it can also be connected in series in the main bus of each group of evaporators 1061 (e.g. Figure 7 (As shown).

[0059] During the operation of the refrigeration system 100, the valve device 101 can be opened or closed depending on whether the compressor 102 is running.

[0060] Specifically, when the compressor 102 is in operation, the valve device 101 is opened. In this case, the refrigerant flow path is: compressor 102 → condenser assembly 103 → filter 104 → switching valve 105 → evaporator assembly 106 → valve device 101 → compressor 102.

[0061] When compressor 102 is off, shut-off valve 101 prevents refrigerant that has already flowed through switching valve 105 from flowing back into compressor 102. This shortens the time required for compressor 102 to restart and for evaporator 206 to begin evaporation, thus reducing energy consumption of the refrigeration system. Furthermore, after shut-off valve 101, refrigerant in compressor 102 cannot flow back into evaporator 106, so the temperature of evaporator is not affected by the returning refrigerant. Therefore, the temperature difference between the freezer or refrigerator compartment and the set temperature can be reduced.

[0062] The valve device and refrigeration system provided by this invention have been described in detail above. Specific examples have been used to illustrate the principles and implementation methods of this invention. The descriptions of the embodiments above are merely for the purpose of helping to understand the method and core ideas of this invention. It should be noted that those skilled in the art can make various improvements and modifications to this invention without departing from its principles, and these improvements and modifications also fall within the protection scope of the claims of this invention.

Claims

1. A valve device, characterized in that, The valve device includes an electromagnetic component (20) and a valve component (10). The electromagnetic component (20) includes a coil unit and a magnetic conductive unit. The valve component (10) includes a sleeve (11), a valve seat (12), a valve core (13), two hard magnetic components (14), and a plug seat (18). The sleeve (11) is fitted around the valve seat (12) and the plug seat (18). The sleeve (11) has an inlet hole (111) on its wall. The valve seat (12) and the plug seat (18) are located on both sides of the central axis of the inlet hole (111). The valve seat (12) and the plug seat (18) each have a first end close to the inlet hole (111) and a second end away from the inlet hole (111). The valve seat (12) has an outlet hole (121) at its first end. The first end of the valve seat (12) and the first end of the plug seat (18) each have a sealing surface (c). The valve core (13) is installed between the two sealing surfaces (c). The magnetic guiding unit includes two magnetic guiding plates (26). The magnetic guiding plates (26) have a second connecting hole (262). The second end of the valve seat (12) is press-fitted to the second connecting hole (262) on one of the magnetic guiding plates (26). The second end of the plug seat (18) is press-fitted to the second connecting hole (262) on the other magnetic guiding plate (26). The two hard magnetic components (14) are respectively installed at the first end of the valve seat (12) and the first end of the plug seat (18) to attract the valve core (13) and keep the valve core (13) in contact with the sealing surface (c).

2. The valve device according to claim 1, characterized in that, The coil unit includes a coil frame (21), a coil (22), an encapsulation layer (23), and a lead wire (24). The coil (22) is wound around the outer periphery of the coil frame (21), the encapsulation layer (23) is encapsulated around the outer periphery of the coil (22), and the lead wire (24) is led out from the coil (22). The magnetic guiding unit includes a magnetic core (25), which is installed in the axial through hole of the coil frame (21). The axis of the magnetic core (25) is parallel to the axis of the sleeve (11), and the two ends of the magnetic core (25) are respectively limited or fixedly connected to the two magnetic plates (26).

3. The valve device according to claim 2, characterized in that, The magnetic plate (26) is provided with a first connection hole (261), and the two ends of the magnetic core (25) are respectively interference connected to the first connection hole (261) on the two magnetic plates (26).

4. The valve device according to claim 2, characterized in that, The first end of the valve seat (12) and the first end of the plug seat are both provided with an end face (a) and an annular protrusion (b). The end face (a) faces the valve core (13). The annular protrusion (b) protrudes axially from the central region of the end face (a) toward the valve core (13). The inner circumferential surface of the annular protrusion (b) of the valve seat (12) surrounds and forms the outlet hole (121). The sealing surface (c) is formed on the inner circumferential surface of the annular protrusion (b). The hard magnetic component (14) has an inner hole and is fixedly sleeved on the outer circumference of the annular protrusion (b) through the inner hole.

5. The valve device according to claim 4, characterized in that, The valve seat (12) has a mounting hole (122) at its second end and a flow channel hole (123) inside the valve seat (12). The mounting hole (122) is connected to the outlet hole (121) through the flow channel hole (123). The valve assembly (10) also includes an outlet pipe (17), which is inserted and fixed to the mounting hole (122).

6. The valve device according to claim 5, characterized in that, The diameter of the mounting hole (122) is larger than the diameter of the flow channel hole (123), thereby forming a stepped surface (124) at the junction of the mounting hole (122) and the flow channel hole (123), the stepped surface (124) being used to define the insertion depth of the outlet pipe (17).

7. The valve device according to claim 5, characterized in that, The valve assembly (10) further includes a mounting sleeve (15) and an inlet pipe (16). The mounting sleeve (15) is fitted around the outer periphery of the sleeve (11). The mounting sleeve (15) has a through hole (151) on its sleeve wall. The through hole (151) communicates with the inlet hole (111). The inlet pipe (16) is inserted and fixed to the through hole (151).

8. The valve device according to claim 7, characterized in that, The valve device also includes a housing (30), the main body of the electromagnetic component (20) and the main body of the valve component (10) are both installed in the housing (30), the housing (30) is provided with a first through hole (31) for the inlet pipe (16) and outlet pipe (17) of the valve component (10) to extend out, and a second through hole (32) for the lead wire (24) of the electromagnetic component (20) to extend out.

9. The valve device according to claim 8, characterized in that, The sleeve (11) and the valve seat (12), the sleeve (11) and the plug seat (18), the mounting sleeve (15) and the sleeve (11), the inlet pipe (16) and the mounting sleeve (15), and the outlet pipe (17) and the valve seat (12) are all fixed by welding.

10. The valve device according to any one of claims 1-9, characterized in that, The minimum nominal diameter of the valve device is not less than 3mm, and the inlet pressure P of the valve device is in the range of 0.5MPa≥P≥0.1MPa.

11. The valve device according to any one of claims 1-9, characterized in that, The valve device is powered by a pulse power supply.

12. A refrigeration system (100), the refrigeration system (100) comprising a compressor (102), a condenser assembly (103), a filter (104), a switching valve (105), and an evaporator assembly (106) connected in series, characterized in that, The refrigeration system (100) further includes a valve device (101), which is the valve device according to any one of claims 1-11; the inlet port (111) of the valve device is connected to the refrigerant outlet of the evaporation assembly (106), and the outlet port (121) of the valve device (101) is connected to the refrigerant inlet of the compressor (102); when the compressor (102) is in the closed state, the valve device (101) is shut off.

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