Multi-way switching valve

Abstract

The utility model provides a multi-way switching valve. The multi-way switching valve comprises a valve terminal, a switching assembly and a driving assembly. The valve terminal is provided with a first port, a second port, a third port and a fourth port, the first port is used for circulating a low-temperature heat exchange medium, and the second port is used for circulating a high-temperature heat exchange medium; the switching assembly comprises a main body structure and a valve element structure. A first circulation cavity and a second circulation cavity are formed in the main body structure, the first circulation cavity communicates with the first opening, and the second circulation cavity communicates with the second opening; the valve core structure is rotatably arranged on the main body structure; the driving assembly is in driving connection with the valve element structure. The first circulation cavity is located between the driving assembly and the second circulation cavity, and the first circulation cavity communicates with the interior of the driving assembly. According to the utility model, the characteristic that the low-temperature heat exchange medium cannot generate adverse effects on the magnetism of the rotor and the stator of the motor in the driving assembly is ingeniously utilized, so that the connecting end of the driving assembly and the valve core structure does not need to be additionally provided with a sealing ring, and the resistance of the valve core structure during rotation is obviously reduced.

Description

TECHNICAL FIELD

[0001] The utility model relates to valve technical field, specifically, relate to a multi-pass switching valve. BACKGROUND

[0002] At present, for the switching of heating and refrigeration mode in air conditioning system, mainly through four-way valve switching.

[0003] The four-way valve in the prior art usually comprises a valve island, the valve island is provided with a main flow channel and three branch flow channels, the high-temperature inlet of the main flow channel is communicated with the high-temperature outlet of the compressor, the three branch flow channels are respectively provided with a low-temperature outlet, an evaporator port and a condenser port, the condenser port is communicated with the condenser, the evaporator port is communicated with the evaporator, and the low-temperature outlet is communicated with the low-temperature inlet of the compressor; when the air conditioner needs to switch between the refrigeration mode and the heating mode, the four-way valve can realize the communication between the main flow channel and a certain branch flow channel by rotating the valve core in the valve island, thereby realizing the reversing switching operation.

[0004] However, the motor assembly for driving the valve core to rotate of the existing four-way valve is usually arranged close to the high-temperature outlet position of the compressor, if the high-temperature heat exchange medium at the high-temperature outlet enters into the motor rotor and stator through the connection position of the motor assembly and the valve core, the high-temperature heat exchange medium will significantly affect the magnetism of the motor rotor and stator, so that the motor cannot work stably, thereby seriously reducing the working stability of the four-way valve, therefore, in order to avoid the above situation, the prior art usually sets multiple sealing rings around the valve core to seal, so as to prevent the high-temperature heat exchange medium from entering into the motor rotor and stator; however, the multiple sealing rings will obviously increase the resistance when the valve core rotates, resulting in that the load torque of the motor assembly driving the valve core to rotate is large, which increases the additional wear of the motor and the valve core, thereby reducing the service life and working reliability of the four-way valve. UTILITY MODEL CONTENTS

[0005] The utility model provides a multi-pass switching valve, to solve the problem that the multiple sealing rings are set around the valve core of the four-way valve in the prior art, resulting in that the load torque of the motor driving the valve core to rotate is large, which increases the additional wear of the motor and the valve core.

[0006] In order to solve the above problems, the utility model provides a kind of multi-pass switching valve, comprising: valve island, switching assembly and drive assembly;Valve island has first port, second port, third port and fourth port, first port is used to flow low-temperature heat exchange medium, second port is used to flow high-temperature heat exchange medium;Switching assembly includes main body structure and valve core structure;Main body structure has first flow passage and second flow passage inside, first flow passage is communicated with first port, second flow passage is communicated with second port;Valve core structure is rotatably arranged on main body structure, and valve core structure is used to switch one of first port, second port and one of third port, fourth port to be communicated;Drive assembly is drivingly connected with valve core structure, for driving valve core structure to rotate;Wherein, first flow passage is located between drive assembly and second flow passage, and first flow passage is communicated with the inside of drive assembly.

[0007] Further, the multi-pass switching valve further comprises a core sealing structure, which is sleeved on the outer periphery of the valve core structure and located between the first port and the second port.

[0008] Further, the main body structure further has a mounting hole inside, which is respectively communicated with the first flow passage and the second flow passage;A part of the valve core structure passes through the mounting hole and enters the second flow passage;Wherein, the core sealing structure is sealingly matched with the inner wall of the mounting hole and the outer periphery of the valve core structure, so as to isolate the first flow passage and the second flow passage.

[0009] Further, the valve core structure comprises a valve core, a first bearing and a second bearing respectively arranged on the main body structure, the valve core has a switching channel inside, one end of the switching channel is communicated with the first port, and the other end is selectively communicated with the third port or the fourth port through the rotation of the valve core;The first bearing is arranged between the core sealing structure and the second port, and is matched with the outer periphery of the valve core;The second bearing is arranged at the connecting end of the valve core and the drive assembly, and is matched with the outer periphery of the valve core.

[0010] Further, the valve island has a mounting cavity inside;The first port and the second port are arranged on the side wall of the valve island and are spaced apart along the axial direction of the valve island, and the third port and the fourth port are arranged on the bottom wall of the valve island;The main body structure separates the mounting cavity into a first chamber and a second chamber, the first chamber is communicated with the first port, and the second chamber is communicated with the second port;The main body structure comprises an upper valve cover, a valve body and a lower valve seat;The valve body is arranged in the mounting cavity, and the valve body has a first flow passage and a second flow passage inside;The upper valve cover is fixedly arranged at one end of the valve body in the axial direction, for sealing the first flow passage;The lower valve seat is fixedly arranged at the other end of the valve body in the axial direction, for sealing the second flow passage;Wherein, the connecting end of the drive assembly and the valve core structure is located at the upper valve cover, and the valve core structure and the upper valve cover have a channel communicated with the inside of the drive assembly.

[0011] Further, the valve core structure comprises a valve core body, a first bearing, a second bearing, a third bearing, a slider and an annular sealing ring; the valve core body has a switching channel inside; one end of the switching channel is communicated with the first port, and the other end is located in the second flow passage and selectively communicated with the third port or the fourth port through rotation of the valve core body; the first bearing is arranged on the valve body and matched with the outer periphery of the valve core body; the second bearing is arranged on the upper valve cover and matched with the outer periphery of the valve core body; the third bearing is arranged on the lower valve seat and matched with the outer periphery of the end of the valve core body away from the second bearing; the slider is sleeved on the end of the valve core body located in the second flow passage, and the internal channel is communicated with the switching channel; the annular sealing ring is arranged between the slider and the end of the valve core body located in the second flow passage, for sealing the gap between the slider and the valve core body; wherein the slider is slidably arranged on the lower valve seat.

[0012] Further, the lower valve seat has a fifth port and a sixth port, the fifth port is communicated with the third port, and the sixth port is communicated with the fourth port; when the slider does not block the fifth port and the sixth port, the fifth port and the sixth port are respectively communicated with the second flow passage; when the internal channel of the slider is communicated with the fifth port, the slider seals the fifth port to isolate the fifth port from the second flow passage, and the sixth port is communicated with the second port; when the internal channel of the slider is communicated with the sixth port, the slider seals the sixth port to isolate the sixth port from the second flow passage, and the fifth port is communicated with the second port; and / or the annular sealing ring is made of elastic material; the slider and / or the lower valve seat is made of plastic material.

[0013] Further, the valve core structure comprises a valve core body, the valve core body has a switching channel inside, one end of the switching channel is communicated with the first port, and the other end is selectively communicated with the third port or the fourth port through rotation of the valve core body; the valve core body comprises a main core body, an upper valve core shaft and a lower valve core shaft; the upper valve core shaft is arranged at one end of the main core body close to the first port, and the lower valve core shaft is arranged at the other end of the main core body away from the first port; the inside of the upper valve core shaft is communicated with the inside of the main core body to form at least part of the switching channel; the upper valve core shaft and the lower valve core shaft are respectively rotationally connected with the two ends of the main body structure in the axial direction, and the main core body is arranged in the axial direction.

[0014] Further, the upper valve core shaft and / or the lower valve core shaft is sealingly and fixedly connected with the main core body by welding.

[0015] Further, the driving assembly comprises a driving motor, a speed regulating gear structure and an output gear structure; the driving motor is connected with the speed regulating gear structure; the output gear structure has a cavity inside, the inner wall of the cavity has annularly arranged teeth, at least part of the speed regulating gear structure is arranged in the cavity and engaged with the teeth; the output gear is connected with the valve core structure; wherein the driving motor drives the speed regulating gear structure to rotate, the speed regulating gear structure drives the output gear structure and the valve core structure to rotate through the teeth.

[0016] Further, the output gear structure has an opening at one end thereof facing the speed regulating gear structure, the opening is communicated with the cavity, at least a part of the speed regulating gear structure enters the cavity through the opening, and the end of the output gear structure away from the opening is connected with the valve core structure; and / or, the connecting end of the output gear structure with the valve core structure has a matching hole, at least a part of the connecting end of the valve core structure with the output gear structure is inserted into the matching hole and is limited and matched with the inner wall of the matching hole, the inner wall of the matching hole has at least one plane, and the plane is used for limiting the relative fixation of the valve core structure and the output gear structure.

[0017] Further, the first port is communicated with a low-temperature inlet of the compressor for circulating the heat exchange medium, the second port is communicated with a high-temperature outlet of the compressor for circulating the heat exchange medium, the third port is communicated with the condenser, and the fourth port is communicated with the evaporator; wherein the switching assembly switches one of the first port and the second port to be communicated with one of the third port and the fourth port, and switches the other of the first port and the second port to be communicated with the other of the third port and the fourth port, so as to control the circulation path of the heat exchange medium.

[0018] The technical scheme of the utility model provides a multi-path switching valve, comprising: a valve island, a switching assembly and a driving assembly; the valve island has a first port, a second port, a third port and a fourth port, the first port is used for circulating low-temperature heat exchange medium, and the second port is used for circulating high-temperature heat exchange medium; the switching assembly comprises a main body structure and a valve core structure; the main body structure has a first circulation cavity and a second circulation cavity inside, the first circulation cavity is communicated with the first port, and the second circulation cavity is communicated with the second port; the valve core structure is rotatably arranged on the main body structure, and the valve core structure is used for switching one of the first port and the second port to be communicated with one of the third port and the fourth port; the driving assembly is drivingly connected with the valve core structure and is used for driving the valve core structure to rotate; wherein the first circulation cavity is located between the driving assembly and the second circulation cavity, and the first circulation cavity is communicated with the inside of the driving assembly.

[0019] The utility model discloses a first flow cavity is located between the drive assembly and the second flow cavity, and the first flow cavity is communicated with the inside of the drive assembly, makes the connection end of drive assembly and valve core structure be located in the one end of main body structure close to the first mouth, makes the high temperature heat exchange medium not enter into the drive assembly, avoids the high temperature heat exchange medium to the magnetism of motor rotor and stator and produces the disadvantageous effect, makes the drive assembly can stable work, and then guarantees the working stability of four -way valve, and, through setting up the first mouth flow circulation low temperature heat exchange medium and the first flow cavity with the first mouth intercommunication, ingenious use low temperature heat exchange medium will not to the magnetism of motor rotor and stator in drive assembly and produce the disadvantageous effect, makes the connection end of drive assembly and valve core structure can not set up sealing washer additionally, compared with prior art sets up multiple sealing washer and is set in the outer periphery of valve core and seals the mode, the utility model significantly reduces the number of sealing washer that is set in the outer periphery of valve core structure, and then obviously reduces the resistance when valve core structure rotates, reduces the load torque and additional wear when drive assembly drives valve core structure to rotate, and then improves the service life and working reliability of multi -way switching valve, the utility model discloses the position of the connection end of drive assembly and valve core structure is optimized, realizes the simplification of sealing washer number, not only reduces the number of parts, also reduces the overall rotation resistance, makes the switching action of multi -way switching valve more reliable and smooth, the utility model discloses simple structure and low in cost, convenient to assemble and subsequent maintenance, is suitable for large -scale popularization and use, the multi -way switching valve of the utility model discloses can be high -efficiently used in automobile air conditioning system, refrigeration system, can significantly improve the response speed and reliability of system, reduce maintenance cost, have remarkable economic benefits and market competitiveness. BRIEF DESCRIPTION OF DRAWINGS

[0020] The drawings accompanying the specification of this application form a part thereof, serve to provide further understanding of the application, and together with the description, explain the application. Such an embodiment of the application, as herein illustrated and described, is not to be considered limiting of the application. In the drawings:

[0021] Figure 1 An internal structure schematic view of the multi -way switching valve provided by the embodiment of the utility model is shown;

[0022] Figure 2 An internal structure schematic view of the multi -way switching valve when not inserting the valve island provided by the embodiment of the utility model is shown;

[0023] Figure 3 An external structure schematic view of the switching assembly provided by the embodiment of the utility model is shown;

[0024] Figure 4 An external structure schematic view of the valve core body provided by the embodiment of the utility model is shown;

[0025] Figure 5The internal structure schematic view of the valve core body is shown in the embodiment of the utility model;

[0026] Figure 6 The external structure schematic view of the multi-pass switching valve is shown in the embodiment of the utility model;

[0027] Figure 7 The specific structure schematic view of the output gear structure is shown in the embodiment of the utility model;

[0028] Figure 8 The specific structure schematic view of the valve body is shown in the embodiment of the utility model;

[0029] Figure 9 The specific structure schematic view of the valve body is shown in the embodiment of the utility model;

[0030] Figure 10 The specific structure schematic view of the lower valve seat is shown in the embodiment of the utility model;

[0031] Figure 11 The specific structure schematic view of the lower valve seat is shown in the embodiment of the utility model;

[0032] Figure 12 The specific structure schematic view of the upper valve cover is shown in the embodiment of the utility model.

[0033] Among them, the above-mentioned drawing includes the following figure marks:

[0034] 10, valve island; 11, installation cavity; 111, first chamber; 112, second chamber; 12, first port; 13, second port; 14, third port; 15, fourth port;

[0035] 20, switching assembly; 21, fifth port; 22, sixth port; 23, main body structure; 231, first flow-through cavity; 232, second flow-through cavity; 233, upper valve cover; 234, valve body; 235, lower valve seat; 236, mounting hole; 24, valve core structure; 241, switching channel; 242, valve core body; 2421, main core body; 2422, upper valve core shaft; 2423, lower valve core shaft; 243, first bearing; 244, second bearing; 245, third bearing; 246, sliding block; 247, annular sealing ring;

[0036] 60, core body sealing structure;

[0037] 80, driving assembly; 81, driving motor; 82, output gear structure; 821, cavity; 822, gear tooth; 823, matching hole. DETAILED DESCRIPTION

[0038] Clearly, the described embodiments are only a part of the embodiments of the present application, rather than all the embodiments. The description of the at least one exemplary embodiment is actually only illustrative, and is by no means as any limitation on the present application and its application or use. Based on the embodiments in the present application, all other embodiments obtained by those of ordinary skill in the art without creative labor fall within the scope of protection of the present application.

[0039] As shown in Figures 1 to 12 The embodiment of the present application provides a multi-pass switching valve, which comprises a valve island 10, a switching assembly 20 and a driving assembly 80; the valve island 10 is provided with a first port 12, a second port 13, a third port 14 and a fourth port 15, the first port 12 is used for flowing low-temperature heat exchange medium, and the second port 13 is used for flowing high-temperature heat exchange medium; the switching assembly 20 comprises a main body structure 23 and a valve core structure 24; the main body structure 23 is internally provided with a first flow cavity 231 and a second flow cavity 232, the first flow cavity 231 is communicated with the first port 12, and the second flow cavity 232 is communicated with the second port 13; the valve core structure 24 is rotatably arranged on the main body structure 23, and the valve core structure 24 is used for switching one of the first port 12 and the second port 13 to be communicated with one of the third port 14 and the fourth port 15; the driving assembly 80 is drivingly connected with the valve core structure 24 and is used for driving the valve core structure 24 to rotate; wherein the first flow cavity 231 is located between the driving assembly 80 and the second flow cavity 232, and the first flow cavity 231 is communicated with the inside of the driving assembly 80.

[0040] The utility model discloses a first flow cavity 231 is located between the drive assembly 80 and the second flow cavity 232, and the first flow cavity 231 is communicated with the inside of drive assembly 80, makes drive assembly 80 and the connecting end of valve core structure 24 be located in the one end of main body structure 23 close to first mouth 12, makes high temperature heat exchange medium not enter drive assembly 80, avoids the disadvantageous effect of high temperature heat exchange medium to the magnetism of motor rotor and stator, makes drive assembly 80 can work stably, and then guarantee the working stability of four-way valve, and, through setting up first mouth 12 and the intercommunication of first flow cavity 231 and first mouth 12, the characteristic that low temperature heat exchange medium does not have disadvantageous effect to the magnetism of motor rotor and stator in drive assembly 80 is ingeniously utilized, makes the connecting end of drive assembly 80 and valve core structure 24 can not set up sealing washer additionally, compared with prior art sets up multiple sealing washers and seals the mode of the outer periphery of valve core, the utility model significantly reduces the number of sealing washers that sets up in the outer periphery of valve core structure 24, and then obviously reduces the resistance when valve core structure 24 rotates, reduces the load torque and additional wear and tear when drive assembly 80 drives valve core structure 24 to rotate, and then improves the service life and working reliability of multi-way switching valve, the utility model optimizes the position of the connecting end of drive assembly 80 and valve core structure 24, realizes the simplification of sealing washer number, not only reduces the number of parts, but also reduces the overall rotation resistance, makes the switching action of multi-way switching valve more reliable and smooth, the utility model structure is simple and low in cost, is convenient for assembling and subsequent maintenance, is suitable for large-scale popularization and use, the multi-way switching valve proposed in the utility model can be efficiently applied to automobile air conditioning system, refrigeration system, can significantly improve the response speed and reliability of system, reduce maintenance cost, have significant economic benefit and market competitiveness.

[0041] It should be noted that: the main factor affecting the magnetism of the rotor and stator inside the drive assembly 80 is the temperature of the heat exchange medium, and in the utility model, "high temperature" and "low temperature" in the high-temperature heat exchange medium and the low-temperature heat exchange medium are temperature concepts compared with each other, that is, the temperature of the heat exchange medium flowing in the first flow cavity 231 and the first port 12 is lower than the temperature of the heat exchange medium flowing in the second flow cavity 232 and the second port 13.

[0042] As shown in Figure 1 The multi-way switching valve further includes a core sealing structure 60, which is sleeved on the outer periphery of the valve core structure 24 and located between the first port 12 and the second port 13 to prevent the high-temperature heat exchange medium from entering the drive assembly 80.

[0043] By setting the core sealing structure 60, an effective sealing barrier is formed by using the elastic properties of the sealing ring to prevent high-temperature heat exchange medium from entering the drive assembly 80 from the outer periphery of the valve core structure 24, thereby avoiding the magnetic influence of the high-temperature medium on the motor assembly of the drive assembly 80, significantly improving the sealing performance of the multi-way switching valve, ensuring the normal operation of the drive assembly 80, effectively protecting the drive assembly 80 from damage by high-temperature medium, and prolonging the service life of the multi-way switching valve.

[0044] As shown in Figure 1 and Figure 2 , the main body structure 23 has a first flow cavity 231, a second flow cavity 232, and a mounting hole 236 communicating with the first flow cavity 231 and the second flow cavity 232 at both ends; the first flow cavity 231 communicates with the first port 12, and the second flow cavity 232 communicates with the second port 13; a part of the valve core structure 24 passes through the mounting hole 236 and enters the second flow cavity 232; wherein the core sealing structure 60 is in sealing cooperation with the inner wall of the mounting hole 236 and the outer periphery of the valve core structure 24, so as to isolate the first flow cavity 231 and the second flow cavity 232.

[0045] By the cooperation of the core sealing structure 60 and the mounting hole 236, a sealed environment is formed to isolate the flow paths of low-temperature and high-temperature heat exchange medium, preventing leakage of high-temperature medium; the above design improves the sealing performance and switching efficiency of the multi-way switching valve, ensuring the stability and safety of the system operation; in air conditioning systems and refrigeration systems that require strict control of the flow path of heat exchange medium, the adverse effects of high-temperature medium on other components of the system can be effectively avoided, and the overall system performance can be improved.

[0046] As shown in Figure 1 and Figure 2 , the valve core structure 24 includes a valve core 242 and a first bearing 243, at least a part of the first bearing 243 is arranged in the mounting hole 236 and is sleeved on the outer periphery of the valve core 242; wherein the first bearing 243 is located between the core sealing structure 60 and the second port 13.

[0047] By setting the first bearing 243, the low-friction properties of the bearing are utilized to reduce the frictional resistance of the valve core 242 during rotation, improve the switching efficiency, and thereby reduce the energy consumption of the multi-way switching valve during switching, prolong the service life of the valve core 242 and the drive assembly 80; in air conditioning systems that frequently switch between cooling and heating modes, mechanical wear during switching can be effectively reduced, and the overall performance of the system can be improved.

[0048] As shown in Figure 1 , Figure 2 , Figure 3 , Figure 8 , Figure 9 , Figure 10 ,Figure 11 and Figure 12 As shown in the drawings, the valve island 10 has a mounting cavity 11 inside; the first port 12 and the second port 13 are arranged on the side wall of the valve island 10 and are arranged along the axial direction of the valve island 10, the third port 14 and the fourth port 15 are arranged on the bottom wall of the valve island 10; the main body structure 23 separates the mounting cavity 11 into a first cavity 111 and a second cavity 112, the first cavity 111 communicates with the first port 12, and the second cavity 112 communicates with the second port 13; the main body structure includes an upper valve cover, a valve body and a lower valve seat; the valve body is arranged in the mounting cavity, and the valve body has a first flow passage and a second flow passage inside; the first flow passage communicates with the first port, and the second flow passage communicates with the second port; the upper valve cover is fixedly arranged at one end of the valve body in the axial direction, and is used for sealing the first flow passage; the lower valve seat is fixedly arranged at the other end of the valve body in the axial direction, and is used for sealing the second flow passage; wherein the connecting end of the drive assembly and the valve core structure is located at the upper valve cover, and the valve core structure 24 and the upper valve cover 233 have a passage communicating with the inside of the drive assembly 80.

[0049] Through the above arrangement, the design of no sealing ring between the upper valve cover 233 and the valve core structure 24 is realized in structure, the connection design of the drive assembly 80 and the valve core structure 24 is simplified, unnecessary sealing rings are reduced, and the overall friction resistance is reduced; in addition, the above design improves the switching efficiency and reliability of the multi-way switching valve, reduces the energy consumption and wear, simplifies the structure, and reduces the cost; in the automobile air conditioning system and the refrigeration system, the response speed and the reliability of the system can be effectively improved, the maintenance cost is reduced, and remarkable economic benefits and market competitiveness are obtained.

[0050] In one specific embodiment of the present application, it is worth noting that: the passage between the valve core structure 24 and the upper valve cover 233 which communicates with the inside of the drive assembly 80 can be formed by gap cooperation between structures or other ways.

[0051] As Figure 1 and Figure 2As shown, the spool structure 24 includes a spool body 242, a first bearing 243, a second bearing 244, a third bearing 245, a slider 246, and an annular sealing ring 247; the spool body 242 has a switching channel 241 inside, one end of which communicates with the first port 12, the other end of which is located in the second flow cavity 232 and selectively communicates with the third port 14 or the fourth port 15 through rotation of the spool body 242; the first bearing 243 is arranged on the valve body 234 and cooperates with the outer periphery of the spool body 242; the second bearing 244 is arranged on the upper valve cover 233 and cooperates with the outer periphery of the spool body 242; the third bearing 245 is arranged on the lower valve seat 235 and cooperates with the outer periphery of the end of the spool body 242 away from the second bearing 244; the slider 246 is sleeved on the end of the spool body 242 located in the second flow cavity 232, and the internal channel thereof communicates with the switching channel 241; the annular sealing ring 247 is arranged between the slider 246 and the end of the spool body 242 located in the second flow cavity 232, for sealing the gap between the slider 246 and the spool body 242; wherein the slider 246 is slidably arranged on the lower valve seat 235.

[0052] In this way, by utilizing the low-friction characteristics of the first bearing 243 and the second bearing 244, the stability and accuracy of the spool body 242 during rotation are ensured, while the friction is reduced, the switching efficiency is improved, and the efficient and stable switching of the multi-port switching valve is realized, thereby reducing energy consumption and wear, simplifying the structure, and reducing costs; in air conditioning systems and refrigeration systems that require high precision and high frequency switching, the response speed and reliability of the system are effectively improved, and the maintenance cost is reduced.

[0053] The design of the third bearing 245 further reduces the frictional resistance of the spool body 242 during rotation, improves the switching efficiency and stability, and at the same time, reduces the energy consumption of the multi-port switching valve during switching, prolongs the service life of the spool body 242 and the driving assembly 80, and improves the overall reliability; in air conditioning systems that require frequent switching between refrigeration and heating modes, mechanical wear during switching is effectively reduced, and the overall performance of the system is improved.

[0054] Through the sliding cooperation of the slider 246 and the sealing effect of the annular sealing ring 247, the accurate communication of the switching channel 241 with the third port 14 or the fourth port 15 is realized, while medium leakage is prevented, the sealing performance is improved, and the switching accuracy and sealing performance of the multi-port switching valve are significantly improved, thereby reducing energy consumption and wear, prolonging the service life; in air conditioning systems and refrigeration systems that require high precision switching, the response speed and reliability of the system are effectively improved, the maintenance cost is reduced, and there is significant economic benefit and market competitiveness.

[0055] As shown in FIG. 1, the multi-port switching valve 10 includes a valve body 20, a valve cover 30, a valve seat 40, a valve core structure 24, a driving assembly 80, and a valve core driving mechanism 90. Figure 1 , Figure 2 , Figure 3 ,Figure 10 and Figure 11 As shown, the lower valve seat 235 has a fifth port 21 and a sixth port 22. The fifth port 21 is connected to the third port 14, and the sixth port 22 is connected to the fourth port 15. When the slider 246 does not block the fifth port 21 and the sixth port 22, the fifth port 21 and the sixth port 22 are respectively connected to the second flow cavity 232. When the internal channel of the slider 246 is connected to the fifth port 21, the slider 246 seals the fifth port 21 to isolate the fifth port 21 from the second flow cavity 232, and the sixth port 22 is connected to the second port 13. When the internal channel of the slider 246 is connected to the sixth port 22, the slider 246 seals the sixth port 22 to isolate the sixth port 22 from the second flow cavity 232, and the fifth port 21 is connected to the second port 13. And / or, the annular sealing ring 247 is made of elastic material; the slider 246 and / or the lower valve seat 235 are made of plastic material.

[0056] By moving the slider 246, the fifth port 21 and the sixth port 22 can be connected or isolated from the second flow chamber 232, thereby controlling the flow path of the heat exchange medium, improving the switching efficiency and sealing performance of the multi-way switching valve, ensuring the stable operation of the system, and reducing energy consumption and wear. In air conditioning and refrigeration systems that require precise control of the flow path of the heat exchange medium, it effectively improves the system's response speed and reliability, and reduces maintenance costs.

[0057] The annular sealing ring 247, made of elastic material, utilizes its elastic properties to form a tight seal, preventing media leakage. Meanwhile, the plastic slider 246 and / or lower valve seat 235 not only possess excellent wear and corrosion resistance, improving overall stability and service life, but also facilitate processing and cost control. This design enhances the sealing and wear resistance of the multi-way switching valve, reduces energy consumption and wear, extends service life, and facilitates a lightweight overall design. In air conditioning systems requiring frequent switching between cooling and heating modes, it effectively reduces mechanical wear during switching, improves overall system performance, and lowers maintenance costs.

[0058] In one specific embodiment of this utility model, such as Figure 1 , Figure 2 , Figure 4 and Figure 5As shown, the valve core structure 24 includes a valve core body 242, a first bearing 243 and a second bearing 244 respectively disposed on the main body structure 23. The valve core body 242 has a switching channel 241 inside. One end of the switching channel 241 is connected to the first port 12, and the other end can be selectively connected to the third port 14 or the fourth port 15 through the rotation of the valve core body 242. The first bearing 243 is disposed between the core sealing structure 60 and the second port 13 and is engaged with the outer periphery of the valve core body 242. The second bearing 244 is disposed at the connection end between the valve core body 242 and the drive assembly 80 and is engaged with the outer periphery of the valve core body 242.

[0059] The cooperation of the first bearing 243 and the second bearing 244 ensures the smoothness and accuracy of the valve core 242 during rotation. At the same time, the bearings reduce friction and improve switching efficiency, thereby achieving efficient and stable switching of the multi-way switching valve, reducing energy consumption and wear. In air conditioning and refrigeration systems that require high precision and high frequency switching, the system's response speed and reliability are effectively improved.

[0060] like Figure 1 , Figure 2 and Figure 6 As shown, the valve island 10 has an installation cavity 11 inside; the first port 12 and the second port 13 are provided on the side wall of the valve island 10 and are spaced apart along the axial direction of the valve island 10; the third port 14 and the fourth port 15 are provided on the bottom wall of the valve island 10; the main structure 23 isolates the installation cavity 11 into a first chamber 111 and a second chamber 112, the first chamber 111 is connected to the first port 12, and the second chamber 112 is connected to the second port 13.

[0061] The main structure 23 isolates the mounting cavity 11, forming independent low-temperature and high-temperature flow paths, avoiding mutual influence between media, thereby improving the switching efficiency and sealing performance of the multi-way switching valve and ensuring the stable operation of the system; in air conditioning systems that require efficient switching between cooling and heating modes, it effectively improves the system's response speed and reliability, and reduces maintenance costs.

[0062] like Figure 1 and Figure 2 As shown, the valve core structure 24 includes a valve core body 242, a first bearing 243, and a second bearing 244. The valve core body 242 has a switching channel 241 inside. One end of the switching channel 241 is connected to the first port 12, and the other end is located in the second flow cavity 232. It can be selectively connected to the third port 14 or the fourth port 15 by rotating the valve core body 242. The first bearing 243 is disposed on the valve body 234 and cooperates with the outer periphery of the valve core body 242. The second bearing 244 is disposed on the upper valve cover 233 and cooperates with the outer periphery of the valve core body 242.

[0063] like Figure 1 ,Figure 2 , Figure 3 , Figure 4 and Figure 5 As shown, the valve core structure 24 includes a valve core body 242, which has a switching channel 241 inside. One end of the switching channel 241 is connected to the first port 12, and the other end can be selectively connected to the third port 14 or the fourth port 15 through the rotation of the valve core body 242. The valve core body 242 includes a main core body 2421, an upper valve core shaft 2422, and a lower valve core shaft 2423. The upper valve core shaft 2422 is located at the end of the main core body 2421 near the first port 12, and the lower valve core shaft 2423 is located at the end of the main core body 2421 away from the first port 12. The interior of the upper valve core shaft 2422 is connected to the interior of the main core body 2421, forming at least a part of the switching channel 241. The upper valve core shaft 2422 and the lower valve core shaft 2423 are rotatably connected to the two ends of the main body structure 23 in the axial direction, and the main core body 2421 is spaced apart from the bottom wall of the main body structure 23.

[0064] By rotating the valve core 242, the switching channel 241 is connected to the third port 14 or the fourth port 15, thereby controlling the flow path of the heat exchange medium, improving the switching efficiency and sealing performance of the multi-way switching valve, ensuring the stable operation of the system, and reducing energy consumption and wear.

[0065] Specifically, the upper valve spindle 2422 and / or the lower valve spindle 2423 are sealed and fixedly connected to the main core 2421 by welding.

[0066] The welding design creates a tight connection, improving the strength and sealing of the connection and preventing media leakage. This significantly improves the sealing and stability of the multi-way switching valve, reduces energy consumption and wear, and extends its service life. In air conditioning systems that require switching between cooling and heating modes, it effectively reduces mechanical wear during the switching process, improves the overall performance of the system, and lowers maintenance costs.

[0067] like Figure 1 , Figure 2 , Figure 3 , Figure 4 and Figure 5As shown, the upper valve spindle 2422 is drivenly connected to the drive assembly 80; the valve core structure 24 also includes a first bearing 243 and a second bearing 244 respectively disposed on the main body structure 23. The first bearing 243 is sleeved on the end of the upper valve spindle 2422 near the main core 2421 and cooperates with the outer periphery of the upper valve spindle 2422; the second bearing 244 is disposed at the connection end of the upper valve spindle 2422 and the drive assembly 80 and cooperates with the outer periphery of the upper valve spindle 2422; and / or, the valve core structure 24 also includes a first bearing 243 and a second bearing 244 disposed on the main body structure 23. The third bearing 245 on the valve core 24 is sleeved on one end of the lower valve core 2423 near the main body structure 23 and engages with the outer periphery of the lower valve core 2423; and / or, the valve core structure 24 also includes a slider 246 and an annular sealing ring 247. The slider 246 is sleeved on the protrusion at the connection end between the main core 2421 and the lower valve core 2423, and its internal channel communicates with the switching channel 241; the annular sealing ring 247 is disposed between the slider 246 and the protrusion to seal the gap between the slider 246 and the protrusion.

[0068] The connection between the upper valve core shaft 2422 and the drive assembly 80, as well as the cooperation of the first bearing 243, the second bearing 244 and the third bearing 245, ensures the stability and accuracy of the valve core structure 24 during rotation. At the same time, the sealing effect of the slider 246 and the annular sealing ring 247 prevents media leakage and improves the sealing performance. As a result, the overall switching efficiency and sealing performance of the multi-way switching valve are significantly improved, energy consumption and wear are reduced, and service life is extended.

[0069] like Figure 1 , Figure 2 , Figure 3 , Figure 6 and Figure 7 As shown, the drive assembly 80 includes a drive motor 81, a speed regulating gear structure, and an output gear structure 82. The drive motor 81 is connected to the speed regulating gear structure. The output gear structure 82 has a cavity 821 inside, and the inner wall of the cavity 821 has annularly arranged gear teeth 822. At least a portion of the speed regulating gear structure is disposed in the cavity 821 and meshes with the gear teeth 822. The output gear is connected to the valve core structure 24. The drive motor 81 drives the speed regulating gear structure to rotate, and the speed regulating gear structure drives the output gear structure 82 and the valve core structure 24 to rotate through the gear teeth 822.

[0070] The drive motor 81 drives the speed regulating gear structure to rotate, and the speed regulating gear structure then drives the valve core structure 24 to rotate through the meshing of the gear teeth 822 and the output gear structure 82, thereby realizing the switching of the heat exchange medium flow path, which improves the switching efficiency and control accuracy of the multi-way switching valve, reduces energy consumption and wear, and extends service life.

[0071] like Figure 4 ,Figure 5 and Figure 7 As shown, the output gear structure 82 has an opening at one end facing the speed regulating gear structure, which communicates with the cavity 821. At least a portion of the speed regulating gear structure enters the cavity 821 through the opening. The end of the output gear structure 82 away from the opening is connected to the valve core structure 24. And / or, the connection end of the output gear structure 82 and the valve core structure 24 has a mating hole 823. At least a portion of the connection end of the valve core structure 24 and the output gear structure 82 is inserted into the mating hole 823 and is limited to fit with the inner wall of the mating hole 823. The inner wall of the mating hole 823 has at least one plane, which is used to limit the relative fixation of the valve core structure 24 and the output gear structure 82.

[0072] By cooperating with the output gear structure 82 and the speed regulating gear structure, the drive motor 81 achieves precise control of the valve core structure 24. At the same time, the limiting effect of the mating hole 823 ensures a stable connection between the output gear structure 82 and the valve core structure 24, improving switching efficiency and control accuracy. This significantly improves the switching efficiency and control accuracy of the multi-way switching valve, reduces energy consumption and wear, and extends its service life.

[0073] Specifically, the first port 12 is connected to the low-temperature inlet of the compressor for the flow of heat exchange medium, the second port 13 is connected to the high-temperature outlet of the compressor for the flow of heat exchange medium, the third port 14 is connected to the condenser, and the fourth port 15 is connected to the evaporator. The switching component 20 switches one of the first port 12 and the second port 13 to one of the third port 14 and the fourth port 15, and the other of the first port 12 and the second port 13 to the other of the third port 14 and the fourth port 15, so as to control the flow path of the heat exchange medium.

[0074] By rotating the valve core structure 24, the first port 12, the second port 13, the third port 14, and the fourth port 15 can be connected or isolated, thereby controlling the flow path of the heat exchange medium and realizing the switching between cooling and heating modes. This can significantly improve the switching efficiency and control accuracy of the multi-way switching valve, reduce energy consumption and wear, and extend its service life.

[0075] It is worth noting that in a specific embodiment of this utility model, when it is necessary to switch from the cooling mode to the heating mode, the drive motor 81 drives the output gear structure 82 to rotate through the speed regulating gear structure, which in turn drives the valve core structure 24 to rotate, so that the first port 12 is connected to the fourth port 15, and the second port 13 is connected to the third port 14, thereby realizing the switching of the heat exchange medium flow path and thus completing the switching between the cooling and heating modes.

[0076] The specific working process and principle of this utility model will now be described in detail as follows:

[0077] Figure 1This document illustrates a structural schematic diagram of an embodiment of the multi-port switching valve provided in this application. The valve island 10, as the basic component of the entire multi-port switching valve, has an internal mounting cavity 11. A first port 12 and a second port 13 are respectively disposed on the side wall of the valve island 10 and spaced apart along the axial direction of the valve island 10. A third port 14 and a fourth port 15 are disposed on the bottom wall of the valve island 10. Figure 1 and Figure 6 As shown, the valve island 10 has an inlet (first port 12) for low-temperature heat exchange medium and an outlet (second port 13) for high-temperature heat exchange medium on its side wall, as well as a condenser interface (third port 14) and an evaporator interface (fourth port 15) on its bottom wall; the main structure 23 is inserted into the valve island 10, which isolates the installation cavity 11 into a first chamber 111 and a second chamber 112. The first port 12 is connected to the first chamber 111, and the second port 13 is connected to the second chamber 112. The main structure 23 includes an upper valve cover 233, a valve body 234, and a lower valve seat 235. The upper valve cover 233 is fixed to one end of the valve body 234 to seal the first flow chamber 231. The lower valve seat 235 is fixed to the other end of the valve body 234 to seal the second flow chamber 232. The connection end between the drive assembly 80 and the valve core structure 24 is located at the upper valve cover 233. The ingenious design is that no additional sealing ring is set between the upper valve cover 233 and the valve core structure 24. Instead, the isolation between the high-temperature heat exchange medium and the drive motor 81 in the drive assembly 80 is achieved through the core sealing structure 60.

[0078] The valve core structure 24 includes a valve core body 242, a first bearing 243, and a second bearing 244. The valve core body 242 has an internal switching channel 241. One end of the switching channel 241 is connected to the first port 12, and the other end, through the rotation of the valve core body 242, can selectively connect to the third port 14 or the fourth port 15, enabling the switching of the heat exchange medium from low temperature to high temperature or vice versa. The first bearing 243 is mounted on the valve body 234, sleeved around the outer periphery of the valve core body 242, and located between the core sealing structure 60 and the second port 13, ensuring the smoothness and sealing of the valve core body 242 during rotation. The second bearing 244 is mounted on the upper valve cover 233, also engaging with the outer periphery of the valve core body 242, ensuring smooth rotation between the valve core body 242 and the upper valve cover 233. It is worth mentioning that, in some embodiments, the valve core structure 24 also includes a third bearing 245, which is fixed on the lower valve seat 235 and cooperates with the distal end of the valve core body 242, further improving the support stability and rotation efficiency of the valve core structure 24. In addition, the valve core structure 24 also includes a slider 246 and an annular sealing ring 247. The slider 246 is sleeved on one end of the valve core body 242 located in the second flow cavity 232, and its internal channel communicates with the switching channel 241. The annular sealing ring 247 is disposed between the slider 246 and the valve core body 242, effectively sealing the gap between the two and preventing leakage of the high-temperature heat exchange medium. In some embodiments, the annular sealing ring 247 is made of an elastic material, such as rubber, to ensure good sealing performance. The slider 246 and the lower valve seat 235 are made of plastic material to reduce the weight of the multi-way switching valve and reduce production costs.

[0079] The drive assembly 80 includes a drive motor 81, a speed regulating gear structure, and an output gear structure 82. The drive motor 81 is connected to the speed regulating gear structure. Through the output power of the drive motor 81, the speed regulating gear structure can adjust the speed, thereby achieving precise control of the output gear structure 82. The output gear structure 82 has a cavity 821 inside. The inner wall of the cavity 821 is provided with ring-shaped teeth 822. Part of the speed regulating gear structure enters the cavity 821 through an opening and meshes with the teeth 822, thereby transmitting the speed-regulated power to the output gear structure 82. The connection end between the output gear structure 82 and the valve core structure 24 is provided with a mating hole 823. At least a part of the valve core structure 24 is inserted into this mating hole 823 and is limited to fit with the inner wall of the mating hole 823. In particular, the inner wall of the mating hole 823 is provided with at least one plane. This plane is used to limit the relative position of the valve core structure 24 and the output gear structure 82, ensuring that the two can be stably fixed together. The speed regulating gear structure is driven to rotate by the drive motor 81, which in turn drives the output gear structure 82 and the valve core structure 24 to rotate together, thereby realizing the precise control of the multi-way switching valve.

[0080] like Figure 4 and Figure 5As shown, the valve core 242 is designed to include a main core 2421, an upper valve spindle 2422, and a lower valve spindle 2423. The upper valve spindle 2422 is located at the end of the main core 2421 near the first port 12, and the lower valve spindle 2423 is located at the end of the main core 2421 away from the first port 12. The upper valve spindle 2422 and the lower valve spindle 2423 are rotatably connected to the two ends of the main structure 23 in the axial direction, respectively. The main core 2421 maintains a certain distance from the bottom wall of the main structure 23, ensuring the free rotation of the valve core structure 24. The interior of the upper valve spindle 2422 is connected to the interior of the main core 2421, together forming part of the switching channel 241. To improve sealing and stability, the upper valve spindle 2422 and / or the lower valve spindle 2423 are sealed and fixedly connected to the main core 2421 by welding. This connection method avoids the leakage problems that may be caused by traditional connection methods and enhances the integrity and durability of the valve core structure 24.

[0081] In one embodiment of this utility model, the slider 246 is sleeved on the protrusion at the connection end between the main core 2421 and the lower valve spindle 2423, and its internal channel communicates with the switching channel 241, enabling the slider 246 to precisely control the flow direction of the heat exchange medium during switching. An annular sealing ring 247 is disposed between the slider 246 and the protrusion to seal the gap between them, preventing leakage of the high-temperature heat exchange medium and ensuring the high efficiency and reliability of the multi-port switching valve. The slider 246 is slidably mounted on the lower valve seat 235. When the slider 246 slides to different positions, it can block or avoid the fifth port 21 and the sixth port 22. Through the precise control of the slider 246, flexible switching of the heat exchange medium flow direction is achieved.

[0082] When the drive motor 81 starts, its output power is transmitted to the output gear structure 82 through the speed regulating gear structure. The gear teeth 822 in the output gear structure 82 mesh with the speed regulating gear structure, effectively transmitting the speed-regulated power to the valve core structure 24. The valve core body 242 in the valve core structure 24 achieves precise rotation through the connection between the upper valve core shaft 2422 and the output gear structure 82, and the rotational connection between the lower valve core shaft 2423 and the lower valve seat 235. When the valve core body 242 rotates, one end of its internal switching channel 241 is always connected to the first port 12, while the other end selectively connects to the third port 14 or the fourth port 15 depending on the rotational position of the valve core body 242, thereby controlling the flow path of the heat exchange medium. During this process, the core sealing structure 60 effectively prevents the high-temperature heat exchange medium from leaking into the drive assembly 80 from the second port 13, protecting the normal operation of the drive assembly 80, avoiding potential damage to the motor by the high-temperature medium, and enhancing the stability and safety of the multi-way switching valve.

[0083] Compared with the prior art, the multi-port switching valve proposed in this utility model has the following significant advantages:

[0084] 1. The connection position between the drive assembly 80 and the valve core structure 24 has been optimized to ensure that the drive assembly 80 is protected from the adverse effects of the high-temperature heat exchange medium, thus ensuring the stable operation of the drive assembly 80 and extending its service life.

[0085] 2. The number of sealing rings on the outer periphery of the valve core structure 24 has been reduced, which effectively reduces the resistance when the valve core body 242 rotates, reduces the load torque and additional wear when the drive assembly 80 drives the valve core body 242 to rotate, and significantly improves the service life and operational reliability of the multi-way switching valve.

[0086] 3. By selecting specific bearings (such as the first bearing 243, the second bearing 244, and the third bearing 245) and sealing structures (such as the core sealing structure 60 and the annular sealing ring 247) in combination, the structure of the multi-way switching valve is not only simplified and the number of parts is reduced, but the overall rotational resistance is also reduced, making the switching action more reliable and smooth. It is suitable for widespread application in automotive air conditioning systems, refrigeration systems, and other applications, and has significant economic benefits and market competitiveness.

[0087] The multi-port switching valve of this application not only embodies innovation and practicality in its design, but also demonstrates high efficiency and economy in practical applications. It is a novel valve worthy of promotion and application in refrigeration systems and automotive air conditioning systems. Through the detailed description of the above embodiments, it is clear that the multi-port switching valve of this application has undergone careful optimization in both structural design and functional implementation, aiming to solve the problems existing in traditional multi-port switching valves and improve the overall operating efficiency and reliability of the system.

[0088] In summary, this utility model provides a multi-way switching valve. By positioning a first flow chamber 231 between the drive assembly 80 and the second flow chamber 232, and connecting the first flow chamber 231 to the interior of the drive assembly 80, the connection end between the drive assembly 80 and the valve core structure 24 is located at the end of the main structure 23 near the first port 12. This prevents the high-temperature heat exchange medium from entering the drive assembly 80, avoiding adverse effects on the magnetism of the motor rotor and stator, thus ensuring stable operation of the drive assembly 80 and guaranteeing the operational stability of the four-way valve. Furthermore, by facilitating the flow of a low-temperature heat exchange medium through the first port 12 and connecting the first flow chamber 231 to the first port 12, this utility model cleverly utilizes the characteristic that the low-temperature heat exchange medium does not adversely affect the magnetism of the motor rotor and stator in the drive assembly 80, eliminating the need for an additional sealing ring at the connection end between the drive assembly 80 and the valve core structure 24. Compared to existing technologies, this utility model offers a more comprehensive and efficient design. By using a sealing ring fitted around the outer circumference of the valve core for sealing, this invention significantly reduces the number of sealing rings fitted around the valve core structure 24, thereby significantly reducing the resistance when the valve core structure 24 rotates. This reduces the load torque and additional wear when the drive assembly 80 drives the valve core structure 24 to rotate, thus improving the service life and operational reliability of the multi-way switching valve. This invention simplifies the number of sealing rings by optimizing the connection position between the drive assembly 80 and the valve core structure 24, reducing not only the number of parts but also the overall rotational resistance, making the switching action of the multi-way switching valve more reliable and smooth. This invention has a simple structure and low cost, is easy to assemble and maintain, and is suitable for large-scale promotion and use. The multi-way switching valve proposed in this invention can be efficiently applied to automotive air conditioning and refrigeration systems, significantly improving system response speed and reliability, reducing maintenance costs, and possessing significant economic benefits and market competitiveness.

[0089] It should be noted that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to limit the exemplary embodiments according to this application. As used herein, the singular form is intended to include the plural form as well, unless the context clearly indicates otherwise. Furthermore, it should be understood that when the terms "comprising" and / or "including" are used in this specification, they indicate the presence of features, steps, operations, devices, components, and / or combinations thereof.

[0090] Unless otherwise specifically stated, the relative arrangement, numerical expressions, and values ​​of the components and steps described in these embodiments do not limit the scope of this invention. It should also be understood that, for ease of description, the dimensions of the various parts shown in the drawings are not drawn to actual scale. Techniques, methods, and devices known to those skilled in the art may not be discussed in detail, but where appropriate, such techniques, methods, and devices should be considered part of the specification. In all examples shown and discussed herein, any specific values ​​should be interpreted as merely exemplary and not as limitations. Therefore, other examples of exemplary embodiments may have different values. It should be noted that similar reference numerals and letters in the following drawings denote similar items; therefore, once an item is defined in one drawing, it need not be further discussed in subsequent drawings.

[0091] In the description of this utility model, it should be understood that the directional terms such as "front, back, up, down, left, right", "horizontal, vertical, horizontal" and "top, bottom" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model and simplifying the description. Unless otherwise stated, these directional terms do not indicate or imply that the device or element referred to must have a specific orientation or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation on the scope of protection of this utility model. The directional terms "inner" and "outer" refer to the inner and outer contours of each component itself.

[0092] For ease of description, spatial relative terms such as "above," "on top of," "on the upper surface of," "above," etc., are used herein to describe the spatial positional relationship of a device or feature as shown in the figures to other devices or features. It should be understood that spatial relative terms are intended to encompass different orientations in use or operation beyond the orientation of the device as described in the figures. For example, if the device in the figures were inverted, a device described as "above" or "on top of" other devices or structures would subsequently be positioned as "below" or "under" other devices or structures. Thus, the exemplary term "above" can include both "above" and "below." The device may also be positioned in other different ways (rotated 90 degrees or in other orientations), and the spatial relative descriptions used herein will be interpreted accordingly.

[0093] Furthermore, it should be noted that the use of terms such as "first" and "second" to define components is merely for the purpose of distinguishing the corresponding components. Unless otherwise stated, the above terms have no special meaning and therefore cannot be construed as limiting the scope of protection of this utility model.

[0094] The above description is merely a preferred embodiment of this utility model and is not intended to limit the utility model. Various modifications and variations can be made to this utility model by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this utility model should be included within the protection scope of this utility model.

Claims

1. A multi-port switching valve, characterized in that, include: The valve island (10), switching assembly (20), and drive assembly (80) are provided. The valve island (10) has a first port (12), a second port (13), a third port (14), and a fourth port (15). The first port (12) is used for flowing low-temperature heat exchange medium, and the second port (13) is used for flowing high-temperature heat exchange medium. The switching assembly (20) includes a main structure (23) and a valve core structure (24). The main structure (23) has a first flow cavity (231) and a second flow cavity (232) inside. The first flow cavity (231) is connected to the first port (12), and the second flow cavity (232) is connected to the second port (80). The valve core structure (24) is rotatably disposed on the main body structure (23) and is used to switch one of the first port (12) and the second port (13) to be connected to one of the third port (14) and the fourth port (15); the drive assembly (80) is drivenly connected to the valve core structure (24) and is used to drive the valve core structure (24) to rotate; wherein, the first flow cavity (231) is located between the drive assembly (80) and the second flow cavity (232) and the first flow cavity (231) is connected to the interior of the drive assembly (80).

2. The multi-port switching valve according to claim 1, characterized in that, The multi-port switching valve also includes a core sealing structure (60), which is sleeved on the outer periphery of the valve core structure (24) and located between the first port (12) and the second port (13).

3. The multi-port switching valve according to claim 2, characterized in that, The main structure (23) also has mounting holes (236) at both ends that are connected to the first flow cavity (231) and the second flow cavity (232) respectively; a part of the valve core structure (24) passes through the mounting hole (236) and enters the second flow cavity (232); wherein, the core sealing structure (60) is respectively sealed and cooperates with the inner wall of the mounting hole (236) and the outer periphery of the valve core structure (24) to isolate the first flow cavity (231) and the second flow cavity (232).

4. The multi-port switching valve according to claim 2, characterized in that, The valve core structure (24) includes a valve core body (242), a first bearing (243) and a second bearing (244) respectively disposed on the main body structure (23). The valve core body (242) has a switching channel (241) inside. One end of the switching channel (241) is connected to the first port (12), and the other end is selectively connected to the third port (14) or the fourth port (15) by the rotation of the valve core body (242). The first bearing (243) is disposed between the core sealing structure (60) and the second port (13) and is engaged with the outer periphery of the valve core body (242). The second bearing (244) is disposed at the connection end between the valve core body (242) and the drive assembly (80) and is engaged with the outer periphery of the valve core body (242).

5. The multi-port switching valve according to claim 1, characterized in that, The valve island (10) has an installation cavity (11) inside; the first port (12) and the second port (13) are disposed on the side wall of the valve island (10) and are spaced apart along the axial direction of the valve island (10); the third port (14) and the fourth port (15) are disposed on the bottom wall of the valve island (10); the main structure (23) isolates the installation cavity (11) into a first chamber (111) and a second chamber (112), the first chamber (111) is connected to the first port (12), and the second chamber (112) is connected to the second port (13); The main structure (23) includes an upper valve cover (233), a valve body (234), and a lower valve seat (235); the valve body (234) is disposed in the mounting cavity (11), and the valve body (234) has a first flow cavity (231) and a second flow cavity (232) inside; the upper valve cover (233) is fixedly disposed at one end of the valve body (234) in the axial direction for sealing the first flow cavity (231); the lower valve seat (235) is fixedly disposed at the other end of the valve body (234) in the axial direction for sealing the second flow cavity (232); wherein, the connection end of the drive assembly (80) and the valve core structure (24) is located at the upper valve cover (233), and there is a channel between the valve core structure (24) and the upper valve cover (233) communicating with the interior of the drive assembly (80).

6. The multi-port switching valve according to claim 5, characterized in that, The valve core structure (24) includes a valve core body (242), a first bearing (243), a second bearing (244), a third bearing (245), a slider (246), and an annular sealing ring (247); The valve core (242) has a switching channel (241) inside. One end of the switching channel (241) is connected to the first port (12), and the other end is located in the second flow cavity (232). It can be selectively connected to the third port (14) or the fourth port (15) by rotating the valve core (242). The first bearing (243) is disposed on the valve body (234) and cooperates with the outer periphery of the valve core (242). The second bearing (244) is disposed on the upper valve cover (233) and cooperates with the outer periphery of the valve core (242). The third bearing (245) is disposed on the lower valve seat (235) and engages with the outer periphery of the end of the valve core (242) away from the second bearing (244); The slider (246) is sleeved on one end of the valve core (242) located in the second flow cavity (232), and its internal channel is connected to the switching channel (241); the annular sealing ring (247) is disposed between the slider (246) and the valve core (242) located in the second flow cavity (232) to seal the gap between the slider (246) and the valve core (242); wherein the slider (246) is slidably disposed on the lower valve seat (235).

7. The multi-port switching valve according to claim 6, characterized in that, The lower valve seat (235) has a fifth port (21) and a sixth port (22). The fifth port (21) is connected to the third port (14), and the sixth port (22) is connected to the fourth port (15). When the slider (246) does not block the fifth port (21) and the sixth port (22), the fifth port (21) and the sixth port (22) are respectively connected to the second flow cavity (232). The internal channel of the slider (246) is connected to the fifth port (21). When the slider (246) seals the fifth port (21) to isolate the fifth port (21) from the second flow cavity (232), the sixth port (22) communicates with the second port (13); when the internal channel of the slider (246) communicates with the sixth port (22), the slider (246) seals the sixth port (22) to isolate the sixth port (22) from the second flow cavity (232), the fifth port (21) communicates with the second port (13); And / or, the annular sealing ring (247) is made of an elastic material; the slider (246) and / or the lower valve seat (235) is made of a plastic material.

8. The multi-port switching valve according to claim 1, characterized in that, The valve core structure (24) includes a valve core body (242), which has a switching channel (241) inside. One end of the switching channel (241) is connected to the first port (12), and the other end can be selectively connected to the third port (14) or the fourth port (15) by rotating the valve core body (242). The valve core body (242) includes a main core body (2421), an upper valve core shaft (2422), and a lower valve core shaft (2423). The upper valve core shaft (2422) is disposed on the main core body (2421). The lower valve spindle (2423) is located at the end of the main core (2421) away from the first port (12) near the first port (12); the interior of the upper valve spindle (2422) is connected to the interior of the main core (2421) to form at least a part of the switching channel (241); the upper valve spindle (2422) and the lower valve spindle (2423) are respectively rotatably connected to the two ends of the main structure (23) in the axial direction, and the main core (2421) is spaced apart from the bottom wall of the main structure (23).

9. The multi-port switching valve according to claim 8, characterized in that, The upper valve spindle (2422) and / or the lower valve spindle (2423) are sealed and fixedly connected to the main core (2421) by welding.

10. The multi-port switching valve according to claim 1, characterized in that, The drive assembly (80) includes a drive motor (81), a speed regulating gear structure, and an output gear structure (82). The drive motor (81) is connected to the speed regulating gear structure. The output gear structure (82) has a cavity (821) inside. The inner wall of the cavity (821) has annularly arranged gear teeth (822). At least a portion of the speed regulating gear structure is disposed in the cavity (821) and meshes with the gear teeth (822). The output gear is connected to the valve core structure (24); wherein, the drive motor (81) drives the speed regulating gear structure to rotate, and the speed regulating gear structure drives the output gear structure (82) and the valve core structure (24) to rotate through the gear teeth (822).

11. The multi-port switching valve according to claim 10, characterized in that, The output gear structure (82) has an opening at one end facing the speed regulating gear structure, the opening communicating with the cavity (821), at least a portion of the speed regulating gear structure entering the cavity (821) through the opening, and the end of the output gear structure (82) away from the opening connected to the valve core structure (24); and / or, the connection end of the output gear structure (82) and the valve core structure (24) has a mating hole (823), at least a portion of the connection end of the valve core structure (24) and the output gear structure (82) is inserted into the mating hole (823) and is limited to fit with the inner wall of the mating hole (823), the inner wall of the mating hole (823) has at least one plane, the plane being used to limit the relative fixation of the valve core structure (24) and the output gear structure (82).

12. The multi-port switching valve according to claim 1, characterized in that, The first port (12) is connected to the low-temperature inlet of the compressor for the flow of heat exchange medium, and the second port (13) is connected to the high-temperature outlet of the compressor for the flow of heat exchange medium; the third port (14) is connected to the condenser, and the fourth port (15) is connected to the evaporator; wherein, the switching component (20) switches one of the first port (12) and the second port (13) to be connected to one of the third port (14) and the fourth port (15), and the other of the first port (12) and the second port (13) to be connected to the other of the third port (14) and the fourth port (15), so as to control the flow path of the heat exchange medium.

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