Electric ball valve and refrigerator defrosting system

Abstract

The utility model discloses an electric ball valve and a refrigerator defrosting system, a driving part is adopted, the driving part can drive a gear set of a gear reduction mechanism to rotate after being electrified, and the gear reduction mechanism can drive a valve core part to rotate so as to switch a first working state and a second working state of the valve core part. The electric ball valve does not depend on the pressure of a system, and reversing can be achieved when the electric ball valve is powered on.

Description

Technical Field

[0001] The utility model relates to the technical field of refrigerators, in particular to an electric ball valve and a refrigerator defrosting system. Background Art

[0002] Figure 1a It is a flow diagram of the refrigerant gas in normal refrigeration in the background technology; Figure 1b It is a flow diagram of the refrigeration gas during defrosting in the background technology; Figure 1c It is the overall structure diagram of the four-way valve in the background technology.

[0003] Chinese patent CN2716771Y discloses a refrigerator that uses a four-way valve for defrosting. Figure 1a , Figure 1b , Figure 1c The refrigerator includes a compressor, a condenser, an evaporator and a liquid reservoir, which form a circulation loop. A four-way valve is arranged between the compressor, the condenser, the evaporator and the liquid reservoir. The four ports of the four-way valve are respectively connected to the compressor, the condenser, the evaporator and the liquid reservoir. The compressor is connected to the exhaust port of the four-way valve, the evaporator is connected to the evaporation port of the four-way valve, the condenser is connected to the condensation port of the four-way valve, and the liquid reservoir is connected to the return port of the four-way valve. In this circulation loop, since the refrigerator uses a low-pressure refrigerant, when the ambient temperature is low, the pressure difference between the evaporation pressure and the condensation pressure is small, which is not enough to make the four-way valve switch.

[0004] Therefore, how to provide a solution to overcome or alleviate the above-mentioned deficiencies is a technical problem that needs to be solved urgently by those skilled in the art. Utility Model Content

[0005] In order to solve the above technical problems, the utility model provides an electric ball valve, comprising a driving component, a gear reduction mechanism, a valve body component and a valve core component, wherein the gear reduction mechanism comprises a gear set, the valve core component comprises a valve core part, the driving component can drive the gear set to rotate, and the electric ball valve further comprises an inflow port, a first switching port, an outflow port, and a second switching port;

[0006] The valve body component includes an upper support portion and a lower support portion, one of the upper support portion and the valve core component includes an upper positioning portion, the other of the upper support portion and the valve core component includes an upper positioning hole, the upper positioning portion is at least partially located in the upper positioning hole, one of the lower support portion and the valve core component includes a lower positioning portion, the other of the lower support portion and the valve core component includes a lower positioning hole, the lower positioning portion is at least partially located in the lower positioning hole;

[0007] The gear reduction mechanism can drive the valve core part to rotate. When the valve core part is in a first working state, the inlet port is connected to the second switching port, and the first switching port is connected to the outflow port; when the valve core part is in a second working state, the inlet port is connected to the first switching port, and the second switching port is connected to the outflow port.

[0008] The electric ball valve of the present application adopts a driving component. When the driving component is energized, it can drive the gear set of the gear reduction mechanism to rotate. The gear reduction mechanism can drive the valve core part to rotate to switch the valve core part between the first working state and the second working state. Compared with the background technology, the electric ball valve of the present application does not rely on the system pressure and can achieve reversing when powered on.

[0009] The utility model also provides a refrigerator defrosting system, comprising a compressor, a condenser, an evaporator, a throttling device and an electric ball valve, wherein the compressor comprises an air inlet and an air outlet, a first port of the throttling device is connected to the condenser, and a second port of the throttling device is connected to the evaporator, the electric ball valve comprises an inlet port, a first switching port, a second switching port, and an outflow port, the exhaust port is connected to the inlet port, the first switching port is connected to the evaporator, the second switching port is connected to the condenser, and the outflow port is connected to the air inlet, the electric ball valve further comprises a driving component, a gear reduction mechanism and a valve core part, the gear reduction mechanism comprises a gear set, the driving component can drive the gear set to rotate, and the gear reduction mechanism can drive the valve core part to rotate;

[0010] And it is configured as follows: when the valve core part is in a first working state, the inlet port is connected to the second switching port, and the first switching port is connected to the outflow port; when the valve core part is in a second working state, the inlet port is connected to the first switching port, and the second switching port is connected to the outflow port.

[0011] The refrigerator defrost system of the present application adopts a driving component. When the driving component is energized, it can drive the gear set of the gear reduction mechanism to rotate. The gear reduction mechanism can drive the valve core part to rotate to switch the valve core part between the first working state and the second working state. Compared with the background technology, when the pressure difference between the evaporation pressure and the condensation pressure of the refrigerator is small, reversing can also be achieved, thereby realizing the defrost function of the refrigerator. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] Figure 1a It is a flow diagram of the refrigerant gas during normal refrigeration in the background technology;

[0013] Figure 1b It is a flow diagram of the refrigeration gas during defrosting in the background technology;

[0014] Figure 1c It is the overall structure diagram of the four-way valve in the background technology;

[0015] Figure 2 This is a schematic diagram of the cross-sectional structure of the electric ball valve provided by the utility model;

[0016] Figure 3a for Figure 2 A schematic diagram of the structure of the electric ball valve in the first position;

[0017] Figure 3b for Figure 2 A schematic diagram of the structure of the electric ball valve in the second position;

[0018] Figure 4 for Figure 2 A partial enlarged view of the X in the middle;

[0019] Figure 5 for Figure 2 Schematic diagram of the three-dimensional structure of the middle bracket;

[0020] Figure 6 This is a refrigerant flow diagram during normal refrigeration in the refrigerator defrosting system provided by the utility model;

[0021] Figure 7 The utility model is a refrigerant flow diagram during defrosting in the refrigerator defrosting system provided by the utility model.

[0022] Figure 2-Figure 7 The reference numerals in the figures are described as follows:

[0023] 100 electric ball valve, 200 compressor, 201 air inlet, 202 exhaust port, 300 condenser, 400 evaporator, 500 throttling device, 501 first port, 502 second port;

[0024] 1 driving component, 10 valve chamber, 11 rotor, 12 output shaft;

[0025] 2 gear reduction mechanism, 21 gear set;

[0026] 3 valve body component, 31 first valve seat, 311 first step portion, 312 first inner step portion, 32 second valve seat, 321 second step portion, 322 second inner step portion, 33 third valve seat, 331 third step portion, 332 third inner step portion, 34 fourth valve seat, 340 outflow port;

[0027] 35 bracket, 351 upper support portion, 3510 upper positioning hole, 352 extension portion, 3521 first notch portion, 3522 second notch portion, 36 cover, 361 lower support portion, 3610 lower positioning hole, 362 cover step portion, 37 valve body, 370 inner cavity, 371 inner wall of valve body;

[0028] 4 valve core component, 41 valve core part, 411 first flow path, 412 second flow path, 42 positioning rod, 421 first end, 422 second end / lower positioning part, 43 valve stem, 430 valve stem hole, 431 upper positioning part;

[0029] 5 first sealing gasket, 50 inflow port, 51 first outer step portion;

[0030] 6 second sealing pad, 60 first switching port, 61 second outer step portion;

[0031] 7 third sealing pad, 70 second switching port, 71 third outer step portion;

[0032] 81 a first elastic member, 82 a second elastic member, 83 a third elastic member;

[0033] 91 is a first sealing ring, 92 is a second sealing ring, and 93 is a third sealing ring. DETAILED DESCRIPTION

[0034] In order to enable those skilled in the art to better understand the technical solution of the present invention, the present invention is further described in detail below in conjunction with the accompanying drawings and specific embodiments.

[0035] In the embodiments of the present invention, the terms "first", "second", "third", and "fourth" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first", "second", "third", and "fourth" may explicitly or implicitly include one or more of the features.

[0036] In the description of the embodiments of the present invention, it should be noted that, unless otherwise clearly stipulated and limited, the terms "installed", "connected" and "connected" should be understood in a broad sense. For example, "connection" can be a detachable connection or a non-detachable connection; it can be a direct connection or an indirect connection through an intermediate medium.

[0037] In the description of the embodiments of the present utility model, the terms "include", "comprises" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also includes other elements not explicitly listed, or also includes elements inherent to such process, method, article or device. In the absence of further restrictions, an element defined by the sentence "includes a ..." does not exclude the presence of other identical elements in the process, method, article or device including the element.

[0038] Please refer to Figure 2 , Figure 3a , Figure 3b The utility model provides an electric ball valve 100, including a driving component 1, a gear reduction mechanism 2, a valve body component 3, and a valve core component 4. The driving component 1 includes a rotor 11 and an output shaft 12, and the rotor 11 is fixedly connected to the output shaft 12. The rotor 11 can rotate under the excitation of the electromagnetic coil, thereby rotating the output shaft 12. It can be imagined that the driving component 1 can also be a motor, and the motor includes an output shaft 12. The output shaft 12 can rotate after the motor is powered on.

[0039] The gear reduction mechanism 2 includes a gear set 21, and the output shaft 12 can drive the gear set 21 to rotate. The valve core component 4 includes a valve core portion 41, which is spherical, and the gear reduction mechanism 2 can drive the valve core portion 41 to rotate. The valve body component 3 includes an upper support portion and a lower support portion, one of the upper support portion and the valve core component 4 includes an upper positioning portion, and the other of the upper support portion and the valve core component 4 includes an upper positioning hole, and the upper positioning portion is at least partially located in the upper positioning hole; one of the lower support portion and the valve core component 4 includes a lower positioning portion, and the other of the lower support portion and the valve core component 4 includes a lower positioning hole, and the lower positioning portion is at least partially located in the lower positioning hole. The valve core component 4 is positioned by the upper support portion and the lower support portion, so that the valve core portion 41 is centered, which can reduce the impact of the refrigerant on the valve core portion 41.

[0040] As a specific implementation scheme, the valve core component 4 also includes a valve stem 43 and a positioning rod 42, and the valve core part 41 includes a first flow path 411 and a second flow path 412. The valve stem 43 is arranged to pass through the upper positioning hole 3510 of the upper support part 351 described below, and the valve stem 43 includes an upper positioning portion 431, and the upper positioning portion 431 cooperates with the hole wall clearance of the upper positioning hole 3510, thereby realizing the positioning of the valve stem 43 and the bracket 35 described below. The above-mentioned gear set 21 can drive the valve stem 43 to rotate, and the valve stem 43 cooperates with the keyway of the valve core part 41, so that the valve stem 43 can drive the valve core part 41 to rotate, and the lower section of the valve stem 43 has a valve stem hole 430. The positioning rod 42 is at least partially penetrated through the valve core part 41, as shown in FIG. Figure 2 As shown, the positioning rod 42 passes through the upper surface and the lower surface of the valve core part 41, and the positioning rod 42 includes a first end 421 located at the upper end thereof and a second end 422 located at the lower end thereof, and the first end 421 is located in the valve stem hole 430, and the first end 421 is matched with the hole wall clearance of the valve stem hole 430, so as to realize the positioning of the valve stem 43 and the positioning rod 42. Of course, it is also possible that the first end 421 of the positioning rod 42 includes a hole, and the valve stem 43 extends into the hole for positioning, as long as the positioning of the valve stem 43 and the positioning rod 42 can be realized.

[0041] The valve body component 3 includes a valve body 37, a bracket 35 and a cover 36. The valve body 37 is cylindrical. The bracket 35 is located in the inner cavity 370 of the valve body 37. The bracket 35 includes an upper support portion 351. The upper support portion 351 is plate-shaped and is located above the valve core portion 41. The upper support portion 351 supports the gear reduction mechanism 2 and has an upper positioning hole 3510. The cover 36 includes a lower support portion 361. The lower support portion 361 is located below the valve core portion 41 and has a lower positioning hole 3610. The second end portion 422 of the positioning rod 42 is located in the lower positioning hole 3610 and the second end portion 422 serves as a lower positioning portion. With such arrangement, the bracket 35 can center the valve stem 43, and the valve stem 43 and the cover 36 can center the positioning rod 42 and the valve core portion 41, thereby reducing the impact of the refrigerant impact on the valve core portion 41; on the other hand, the reliability of the sealing between the valve core portion 41 and the following three sealing gaskets is increased.

[0042] It should be noted that if Figure 2 As shown, in this embodiment, the valve body 37, the bracket 35 and the cover 36 are separate structures, the bracket 35 is fixedly connected or limitedly connected with the valve body 37, the cover 36 includes a cover step portion 362 with the step surface facing upward, and the cover step portion 362 is fixed to the valve body 37 by welding. Of course, the cover 36 and the valve body 37 can also be fixed by threaded connection, and the bracket 35 or the cover 36 can also be an integral structure with the valve body 37.

[0043] As a specific embodiment, the electric ball valve 100 further includes a first sealing gasket 5, a second sealing gasket 6 and a third sealing gasket 7. The first sealing gasket 5 has an inflow port 50, and the first sealing gasket 5 abuts against the valve core portion 41. The second sealing gasket 6 has a first switching port 60, and the second sealing gasket 6 abuts against the valve core portion 41. The third sealing gasket 7 includes a second switching port 70, and the third sealing gasket 7 abuts against the valve core portion 41. It should be noted that, as Figure 3a , Figure 3b As shown, as described above, the first sealing gasket 5 has an inlet port 50, that is, the first sealing gasket 5 is arranged at the inlet end of the electric ball valve 100, and the outlet end of the electric ball valve 100 is not provided with a sealing gasket, and only the following fourth valve seat 34 needs to be provided, and the fourth valve seat 34 includes an outflow port 340, and the outflow port 340 is directly connected to the valve cavity 10 of the electric ball valve 100; of course, the first sealing gasket 5 can also be arranged at the outlet end of the electric ball valve 100. At this time, the inlet end of the electric ball valve 100 is not provided with a sealing gasket, and the inlet port is directly connected to the valve cavity 10 of the electric ball valve 100.

[0044] Of course, from the perspective of reducing costs, based on Figure 3a , Figure 3b In the illustrated solution, the fourth valve seat 34 may not be provided, and the valve body 37 of the valve body component 3 may be directly provided with an outflow port.

[0045] In the electric ball valve 100 of this embodiment, the gear reduction mechanism 2 can drive the valve core 41 to rotate. When the valve core 41 is in the first working state (refer to Figure 3a ), the first flow path 411 connects the inflow port 50 and the second switching port 70, and the second flow path 412 connects the first switching port 60 and the outflow port 340; when the valve core part 41 is in the second working state (refer to Figure 3b ), the first flow path 411 connects the inflow port 50 and the first switching port 60 , and the second flow path 412 connects the second switching port 70 and the outflow port 340 .

[0046] In the above embodiment, by using the driving component 1, after power is turned on, the output shaft 12 drives the gear set 21 of the gear reduction mechanism 2 to rotate, and the gear set 21 can drive the valve core 41 to rotate to switch the flow direction of the refrigerant. Compared with the background technology, when the pressure difference between the evaporation pressure and the condensation pressure of the refrigerator is small, reversal can also be achieved. On the other hand, by fixing the valve core 41, the possibility of the valve core 41 being offset due to the impact of the refrigerant during the reversal of the electric ball valve 100 is reduced, and the reversal process is more stable and reliable.

[0047] The above-mentioned embodiment adopts a spherical valve core portion 41, and a first flow path 411 and a second flow path 412 are arranged on the valve core portion 41. Of course, as an alternative, the valve core portion can also be a flat valve plate, which is located in the inner cavity of the valve body. The valve plate and the inner wall of the valve body constitute the first flow path and the second flow path. The connection relationship between the first flow path and the second flow path can be switched by rotating the valve plate, thereby realizing the switching of the refrigerant flow direction in the system.

[0048] Further, such as Figure 3a , Figure 3b As shown, the electric ball valve 100 further includes a first elastic member 81, a second elastic member 82 and a third elastic member 83. The valve body component 3 further includes a first valve seat 31, a second valve seat 32 and a third valve seat 33. The first valve seat 31 includes a first step portion 311 with a step surface facing the valve core portion 41, and the first elastic member 81 elastically abuts between the first step portion 311 and the first sealing gasket 5; the second valve seat 32 includes a second step portion 321 with a step surface facing the valve core portion 41, and the second elastic member 82 elastically abuts between the second step portion 321 and the second sealing gasket 6; the third valve seat 33 includes a third step portion 331 with a step surface facing the valve core portion 41, and the third elastic member 83 elastically abuts between the third step portion 331 and the third sealing gasket 6. By providing three elastic members, the three elastic members correspond to the three sealing gaskets respectively, so that the reliability of the three sealing gaskets against the valve core portion 41 can be improved.

[0049] As a specific embodiment, the first elastic member 81, the second elastic member 82 and the third elastic member 83 are elastic sealing rings made of rubber or plastic. The first elastic member 81, the second elastic member 82 and the third elastic member 83 are both elastic members for elastic compensation and sealing members for sealing the gaps between the three valve seats and the three sealing pads.

[0050] As another specific embodiment, Figure 3a , Figure 3b As shown, the first elastic member 81, the second elastic member 82 and the third elastic member 83 are specifically metal springs, which play an elastic compensation role for the three sealing pads. At the same time, the first valve seat 31 also includes a first inner step portion 312 with a step surface facing the valve core portion 41, and the first inner step portion 312 is closer to the valve core portion 41 than the first step portion 311. The second valve seat 32 also includes a second inner step portion 322 with a step surface facing the valve core portion 41, and the second inner step portion 322 is closer to the valve core portion 41 than the second step portion 321. The third valve seat 33 also includes a third inner step portion 332 with a step surface facing the valve core portion 41, and the third inner step portion 332 is closer to the valve core portion 41 than the third step portion 331. The valve core portion 41; the first sealing gasket 5 is at least partially located in the first valve seat 31, that is, the two are nested, the first sealing gasket 5 includes a first outer step portion 51 with a step surface facing the side away from the valve core portion 41, similarly, the second sealing gasket 6 is at least partially located in the second valve seat 32, the second sealing gasket 6 includes a second outer step portion 61 with a step surface facing the side away from the valve core portion 41, and the third sealing gasket 7 is at least partially located in the third valve seat 33, and the third sealing gasket 7 includes a third outer step portion 71 with a step surface facing the side away from the valve core portion 41.

[0051] The electric ball valve 100 further includes a first sealing ring 91, a second sealing ring 92 and a third sealing ring 93. The first sealing ring 91 is located between the step surface of the first inner step portion 312 and the step surface of the first outer step portion 51, the second sealing ring 92 is located between the step surface of the second inner step portion 322 and the step surface of the second outer step portion 61, and the third sealing ring 93 is located between the step surface of the third inner step portion 332 and the step surface of the third outer step portion 71. In this embodiment, three metal springs are used to elastically compensate the three sealing gaskets, and the three sealing rings are used to seal the gaps between the three valve seats and the three sealing gaskets. This method can improve the sealing reliability of the electric ball valve product.

[0052] Furthermore, the first valve seat 31, the second valve seat 32, and the third valve seat 33 are arranged along the circumference of the valve body 37, and the three valve seats are respectively fixed to the valve body 37 by welding. Optionally, in order to improve the processability of assembly, the three valve seats can be welded and fixed to the valve body 37 at one time by furnace welding, and the process is simple and reliable.

[0053] Further, such as Figure 4 Combined with Figure 2As shown, the valve body 37 has a valve body inner wall 371, and the outer peripheral wall of the upper support portion 351 of the bracket 35 is in clearance with the valve body inner wall 371. In this way, the bracket 35 is limited in radial direction by the valve body 37. The bracket 35 also includes an extension portion 352, which is extended downward from the upper support portion 351 along the longitudinal direction of the electric ball valve 100. The extension portion 352 includes a first notch portion 3521. The first valve seat 31 partially extends into the inner cavity 370 of the valve body 37, that is, the portion protrudes inwardly from the valve body inner wall 371. The first notch portion 3521 covers the first valve seat 31. Since the first valve seat 31 is fixedly connected to the valve body 37, the first notch portion 3521 cooperates with the first valve seat 31 to limit the rotation of the bracket 35 relative to the valve body 37, that is, the bracket 35 is limited in circumferential direction.

[0054] Furthermore, the extension portion 352 also includes a second notch portion 3522 and a third notch portion 3533. The first notch portion 3521, the second notch portion 3522 and the third notch portion 3533 are arranged along the circumference of the upper support portion 351. The second valve seat 32 partially extends into the inner cavity 370 of the valve body 37. The second notch portion 3522 covers the second valve seat 32. The third valve seat 33 partially extends into the inner cavity 370 of the valve body 37. The third notch portion 3533 covers the third valve seat 33. Such an arrangement makes the bracket 35 stable in the circumferential direction and reliable in limiting. On the other hand, the bracket 35 is located on three valve seats, which limits the longitudinal downward displacement of the bracket 35, that is, the bracket 35 is limited in the longitudinal direction. In addition, the bracket 35 does not need to be fixed to the valve body 37 through welding and other processes, which simplifies the assembly process. The valve core portion 41 is partially located in the extension portion 352, so that the electric ball valve 100 is compact in the longitudinal structure and can reduce its longitudinal size.

[0055] Figure 6 This is the refrigerant flow diagram in the normal working mode (cooling) of the refrigerator; Figure 7 This is the refrigerant flow diagram in the refrigerator defrosting mode.

[0056] Reference Figure 6 , Figure 7 Combined with Figure 3a , Figure 3b The refrigerator defrosting system of this embodiment is described.

[0057] In the prior art, refrigerators generally use traditional slider-type four-way valves (such as Figure 1cAs shown in the figure), the switching of the refrigerator's refrigeration and defrosting functions is achieved by sliding the slider, which mainly has two problems. Problem one, the traditional four-way valve uses the pressure difference force of the system to push the piston connecting rod assembly to move, thereby driving the slider to move. Since the refrigerator uses a low-pressure refrigerant, when the ambient temperature is low, the pressure difference between the evaporation pressure and the condensation pressure is small, and the four-way valve cannot be reliably switched; Problem two, the slider of the traditional four-way valve applies pressure to it through the high-pressure refrigerant flowing into the inlet end, so that the slider and the valve seat fit and seal, but this sealing method still depends on the size of the system pressure, and the requirements for the leakage of refrigerant in the refrigerator system are higher than those of refrigeration equipment such as air conditioners. Therefore, the above-mentioned electric ball valve is used in the refrigerator defrosting system of this embodiment to solve the two problems mentioned above.

[0058] The refrigerator defrosting system provided in this embodiment includes a compressor 200, a condenser 300, an evaporator 400, a throttling device 500 and an electric ball valve 100. The compressor 200 includes an air inlet 201 and an exhaust port 202, and the throttling device 500 includes a first port 501 and a second port 502. The first port 501 is connected to the condenser 300, and the second port 502 is connected to the evaporator 400. It should be noted that the "connected" here can be directly connected or indirectly connected through a third part. Specifically, Figure 6 , Figure 7 As shown, the electric ball valve 100 includes an inlet port 50, a first switching port 60, a second switching port 70, and an outflow port 340, the exhaust port 202 is connected to the inlet port 50, the first switching port 60 is connected to the evaporator 400, the second switching port 70 is connected to the condenser 300, and the outflow port 340 is connected to the air inlet 201.

[0059] The electric ball valve 100 of this embodiment also includes a driving component 1 and a gear reduction mechanism 2. The driving component 1 includes an output shaft 12. When the driving component 1 is powered on, it can drive the output shaft 12 to rotate. The gear reduction mechanism 2 includes a gear set 21. The output shaft 12 can drive the gear set 21 to rotate. The gear set 21 can drive the valve core 41 to rotate. When the valve core 41 is in the first working state (refer to Figure 3a ), the first flow path 411 connects the inflow port 50 and the second switching port 70, and the second flow path 412 connects the first switching port 60 and the outflow port 340; when the valve core part 41 is in the second working state (refer to Figure 3b ), the first flow path 411 connects the inflow port 50 and the first switching port 60 , and the second flow path 412 connects the second switching port 70 and the outflow port 340 .

[0060] The refrigerator defrosting system of this embodiment overcomes or alleviates the two problems mentioned above by applying the electric ball valve 100, wherein the driving component 1 can drive the valve core part 41 to rotate to switch the refrigeration mode and the defrosting mode of the refrigerator after being energized, which is independent of the pressure difference between the evaporation pressure and the condensation pressure, and can achieve reliable switching without being affected by the system pressure; in addition, as shown above, the electric ball valve 100 adopts a first sealing gasket 5, a second sealing gasket 6 and a third sealing gasket 7, and these three sealing gaskets are respectively sealed against the valve core part 41, and the first sealing gasket 5 achieves elastic compensation through the first elastic member 81, the second sealing gasket 6 achieves elastic compensation through the second elastic member 82, and the third sealing gasket 7 achieves elastic compensation through the third elastic member 83, thereby ensuring reliable sealing between the three sealing gaskets and the valve core part 41, and this sealing method is independent of the size of the system pressure and is simple and reliable.

[0061] It should be understood that the embodiments of the present invention do not limit the type of refrigerant. In specific practice, those skilled in the art can select according to actual needs, as long as it can meet the requirements of use. For example, the refrigerant can be carbon dioxide, water, freon, etc.

[0062] The above are only preferred implementations of the present invention. It should be pointed out that ordinary technicians in this technical field can make several improvements and modifications without departing from the principles of the present invention. These improvements and modifications should also be regarded as the protection scope of the present invention.

Claims

1. An electric ball valve, characterized in that: The electric ball valve comprises a driving component, a gear reduction mechanism, a valve body component and a valve core component, wherein the gear reduction mechanism comprises a gear set, the valve core component comprises a valve core portion, the driving component can drive the gear set to rotate, and the electric ball valve further comprises an inflow port, a first switching port, an outflow port, and a second switching port; The valve body component includes an upper support portion and a lower support portion, one of the upper support portion and the valve core component includes an upper positioning portion, the other of the upper support portion and the valve core component includes an upper positioning hole, the upper positioning portion is at least partially located in the upper positioning hole, one of the lower support portion and the valve core component includes a lower positioning portion, the other of the lower support portion and the valve core component includes a lower positioning hole, the lower positioning portion is at least partially located in the lower positioning hole; The gear reduction mechanism can drive the valve core part to rotate. When the valve core part is in a first working state, the inlet port is connected to the second switching port, and the first switching port is connected to the outflow port; when the valve core part is in a second working state, the inlet port is connected to the first switching port, and the second switching port is connected to the outflow port.

2. The electric ball valve according to claim 1, characterized in that: The driving component includes an output shaft, the output shaft can drive the gear set to rotate, the gear set can drive the valve core to rotate, and the upper support part supports the gear reduction mechanism; The valve core portion includes a first flow path and a second flow path. When the valve core portion is in a first working state, the first flow path connects the inlet port and the second switching port, and the second flow path connects the first switching port and the outflow port; when the valve core portion is in a second working state, the first flow path connects the inlet port and the first switching port, and the second flow path connects the second switching port and the outflow port.

3. The electric ball valve according to claim 1, characterized in that: It also includes a first sealing gasket, a second sealing gasket and a third sealing gasket, the first sealing gasket has the inflow port or the outflow port, the first sealing gasket is against the valve core part, the second sealing gasket has the first switching port, the second sealing gasket is against the valve core part, the third sealing gasket has a second switching port, and the third sealing gasket is against the valve core part.

4. The electric ball valve according to claim 3, characterized in that: It also includes a first elastic member, a second elastic member and a third elastic member, and the valve body component also includes a first valve seat, a second valve seat and a third valve seat, the first valve seat includes a first step portion with a step surface facing the valve core portion, the second valve seat includes a second step portion with a step surface facing the valve core portion, and the third valve seat includes a third step portion with a step surface facing the valve core portion, the first elastic member elastically abuts between the first step portion and the first sealing gasket, the second elastic member elastically abuts between the second step portion and the second sealing gasket, and the third elastic member elastically abuts between the third step portion and the third sealing gasket.

5. The electric ball valve according to claim 4, characterized in that: The first elastic member, the second elastic member and the third elastic member are elastic sealing rings.

6. The electric ball valve according to claim 4, characterized in that: The first elastic member, the second elastic member and the third elastic member are metal springs, the first valve seat further includes a first inner step portion with a step surface facing the valve core portion, the first inner step portion is closer to the valve core portion than the first step portion, the second valve seat further includes a second inner step portion with a step surface facing the valve core portion, the second inner step portion is closer to the valve core portion than the second step portion, the third valve seat further includes a third inner step portion with a step surface facing the valve core portion, the third inner step portion is closer to the valve core portion than the third step portion, the first sealing gasket is at least partially located in the first valve seat, the first sealing gasket includes a first outer step portion with a step surface facing a side away from the valve core portion, the second sealing gasket is at least partially located in the second valve seat, the second sealing gasket includes a second outer step portion with a step surface facing a side away from the valve core portion, the third sealing gasket is at least partially located in the third valve seat, and the third sealing gasket includes a third outer step portion with a step surface facing a side away from the valve core portion; The electric ball valve also includes a first sealing ring, a second sealing ring and a third sealing ring. The first sealing ring is located between the step surface of the first inner step portion and the step surface of the first outer step portion. The second sealing ring is located between the step surface of the second inner step portion and the step surface of the second outer step portion. The third sealing ring is located between the step surface of the third inner step portion and the step surface of the third outer step portion.

7. The electric ball valve according to any one of claims 1 to 6, characterized in that: The valve body component includes a valve body, a first valve seat, a second valve seat, and a third valve seat. The first valve seat, the second valve seat, and the third valve seat are arranged along the circumference of the valve body. The first valve seat is fixedly connected to the valve body, the second valve seat is fixedly connected to the valve body, and the third valve seat is fixedly connected to the valve body.

8. The electric ball valve according to claim 7, characterized in that: The valve body component also includes a bracket, which includes the upper supporting portion and an extension portion. The upper supporting portion is plate-shaped, and the valve body has an inner wall of a valve body. The outer peripheral wall of the upper supporting portion is gap-matched with the inner wall of the valve body. The extension portion is extended downward from the upper supporting portion along the longitudinal direction of the electric ball valve. The extension portion includes a first notch portion, and the first notch portion is coated with the first valve seat. The first notch portion and the first valve seat can cooperate to limit the rotation of the bracket relative to the valve body.

9. The electric ball valve according to claim 8, characterized in that: The extension portion also includes a second notch portion and a third notch portion, the first notch portion, the second notch portion and the third notch portion are arranged along the circumference of the upper support portion, the second notch portion covers the second valve seat, the third notch portion covers the third valve seat, and the valve core portion is partially located in the extension portion.

10. The electric ball valve according to any one of claims 1 to 6, characterized in that: The upper support portion includes the upper positioning hole, the lower support portion includes the lower positioning hole, the valve core component includes a valve stem and a positioning rod, the valve stem passes through the upper positioning hole, the valve stem includes the upper positioning portion, the upper positioning portion is clearance matched with the hole wall of the upper positioning hole, the gear set can drive the valve stem to rotate, the valve stem can drive the valve core portion to rotate, the valve stem includes a valve stem hole, the positioning rod is at least partially penetrated through the valve core portion, the positioning rod includes a first end portion and a second end portion, the first end portion is located in the valve stem hole, the first end portion is clearance matched with the hole wall of the valve stem hole, and the second end portion serves as the lower positioning portion.

11. The electric ball valve according to any one of claims 1 to 6, characterized in that: The valve body component comprises a valve body and a sealing cover, wherein the sealing cover comprises the lower supporting portion, the sealing cover comprises a cover step portion with a step surface facing upward, the cover step portion is fixedly connected to the valve body, and the valve core portion is located above the sealing cover.

12. A refrigerator defrosting system, characterized in that: The invention comprises a compressor, a condenser, an evaporator, a throttling device and an electric ball valve, wherein the compressor comprises an air inlet and an air outlet, a first port of the throttling device is connected to the condenser, and a second port of the throttling device is connected to the evaporator, the electric ball valve comprises an inlet port, a first switching port, a second switching port, and an outflow port, the exhaust port is connected to the inlet port, the first switching port is connected to the evaporator, the second switching port is connected to the condenser, and the outflow port is connected to the air inlet, the electric ball valve further comprises a driving component, a gear reduction mechanism and a valve core part, the gear reduction mechanism comprises a gear set, the driving component can drive the gear set to rotate, and the gear reduction mechanism can drive the valve core part to rotate; And it is configured as follows: when the valve core part is in a first working state, the inlet port is connected to the second switching port, and the first switching port is connected to the outflow port; when the valve core part is in a second working state, the inlet port is connected to the first switching port, and the second switching port is connected to the outflow port.

13. The refrigerator defrosting system according to claim 12, characterized in that: The driving component includes an output shaft, and the output shaft can drive the gear group to rotate, and the gear group can drive the valve core part to rotate, and the valve core part includes a first flow path and a second flow path. When the valve core part is in a first working state, the first flow path connects the inlet port and the second switching port, and the second flow path connects the first switching port and the outflow port; when the valve core part is in a second working state, the first flow path connects the inlet port and the first switching port, and the second flow path connects the second switching port and the outflow port.

14. The refrigerator defrosting system according to claim 12, characterized in that: The electric ball valve includes a valve body component and a valve core component, the valve body component includes an upper supporting portion and a lower supporting portion, one of the upper supporting portion and the valve core component includes an upper positioning portion, the other of the upper supporting portion and the valve core component includes an upper positioning hole, the upper positioning portion is at least partially located in the upper positioning hole, the lower supporting portion and one of the valve core component include a lower positioning portion, the lower supporting portion and the valve core component include a lower positioning hole, the lower positioning portion is at least partially located in the lower positioning hole.

15. The refrigerator defrosting system according to claim 12, characterized in that: The electric ball valve further comprises a first sealing gasket, a second sealing gasket and a third sealing gasket, wherein the first sealing gasket has the inflow port or the outflow port, the first sealing gasket abuts against the valve core portion, the second sealing gasket has the first switching port, the second sealing gasket abuts against the valve core portion, the third sealing gasket has a second switching port, and the third sealing gasket abuts against the valve core portion; The electric ball valve also includes a valve body component, a first elastic member, a second elastic member and a third elastic member. The valve body component also includes a first valve seat, a second valve seat and a third valve seat. The first valve seat includes a first step portion with a step surface facing the valve core portion, the second valve seat includes a second step portion with a step surface facing the valve core portion, and the third valve seat includes a third step portion with a step surface facing the valve core portion. The first elastic member elastically abuts between the first step portion and the first sealing gasket, the second elastic member elastically abuts between the second step portion and the second sealing gasket, and the third elastic member elastically abuts between the third step portion and the third sealing gasket.

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