Semi-closed refrigerant pump
By designing a semi-enclosed structure in the refrigerant pump, the refrigerant flows only within the cylinder, solving the problem of refrigerant absorbing motor heat, improving refrigeration efficiency and motor reliability, and avoiding wiring post problems.
Patent Information
- Application Number
- CN202422176626.X
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-09-05
- Publication Date
- 2025-07-25
- Estimated Expiration
- 2034-09-05
AI Technical Summary
In the fully enclosed structure of the existing refrigerant pump, the refrigerant absorbs the motor heat and leads to a reduction in efficiency. It is necessary to design a pump body structure that avoids heat exchange.
A semi-enclosed refrigerant pump is designed to allow refrigerant to flow only inside the cylinder and the motor is placed outside to avoid heat exchange and gasification. The accommodating cavity structure surrounded by the cylinder block and the cylinder head is adopted to ensure that refrigerant does not enter the motor.
Improve the refrigeration efficiency of the refrigerant pump, prevent heat exchange, improve the reliability and insulation of the motor, and avoid wiring post problems.
Smart Images
Figure CN223152264U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of pump bodies, and particularly relates to a semi-closed refrigerant pump. Background Art
[0002] Refrigerant pumps can be used in refrigeration systems, heat pump systems, and air conditioning systems. The rotor pump of the refrigerant pump includes components such as a motor, a crankshaft, an upper cylinder head, vanes, a lower cylinder head, a cylinder, pump body bolts, and a housing. The crankshaft drives the piston and vanes to move. The movement of the piston causes the volume formed by the piston, the upper cylinder head, the lower cylinder head, the vanes, and the cylinder to change, thereby compressing the refrigerant, enabling the refrigerant to obtain a certain pressure and be discharged from the refrigerant pump. Since in a fully enclosed refrigerant pump, the refrigerant passes through the motor, and the heat of the motor is transferred to the refrigerant, which will cause the refrigerant to vaporize upon suction, reducing the efficiency of the refrigerant pump.
[0003] Therefore, for those skilled in the art, how to design a refrigerant pump that can avoid loss of refrigeration efficiency is a technical problem that needs to be solved urgently at present. Summary of the Utility Model
[0004] The purpose of the utility model is to provide a semi-closed refrigerant pump, in which the refrigerant only flows inside the cylinder block, so as to avoid the refrigerant absorbing heat and affecting heat exchange, and improve the refrigeration efficiency of the refrigerant pump.
[0005] To achieve the above purpose, the utility model provides a semi-closed refrigerant pump, including a cylinder block, a cylinder head, a motor, a crankshaft, a piston, and vanes. The cylinder head is connected to the cylinder block and is used to jointly define an accommodation cavity. The motor is placed outside the accommodation cavity; the piston, the vanes, and the crankshaft are placed inside the accommodation cavity; one end of the crankshaft extends out of the accommodation cavity and is connected to the motor, and the piston is sleeved outside the crankshaft; the cylinder block is provided with a suction port and a discharge port. The piston is used to contact the vanes and slide inside the accommodation cavity, so that the refrigerant entering the suction port is compressed by the piston and discharged from the discharge port.
[0006] Optionally, the semi-closed refrigerant pump further includes a motor support frame. One side of the motor support frame is used to connect to the cylinder head, and the other side of the motor support frame is used to connect to the motor; the motor support frame, the motor, and the cylinder head jointly define an operation window. The drive shaft of the motor and the crankshaft can both extend into the operation window and are connected by a coupling.
[0007] Optionally, the semi-closed refrigerant pump further includes a spring. One end of the spring is fixed on the cylinder block, and the other end of the spring contacts the vanes. After the piston slides, it is used to drive the vanes to compress or release the spring.
[0008] Optionally, the semi-closed refrigerant pump further includes a positioning member. A guiding groove is provided on the cylinder block, and at least part of the blades are placed in the guiding groove; at least part of the positioning member is fixed in the guiding groove, and one end of the spring is connected to the positioning member.
[0009] Optionally, the positioning member is a positioning bolt, and a thread matching the positioning bolt is provided in the guiding groove.
[0010] Optionally, the semi-closed refrigerant pump further includes piston gaskets. The number of the piston gaskets is multiple, and the piston gaskets are respectively arranged between the piston and the cylinder block and between the piston and the cylinder head to seal the gaps between the cylinder block and the piston and between the cylinder head and the piston.
[0011] Optionally, the semi-closed refrigerant pump further includes a sealing gasket. The sealing gasket is arranged between the cylinder block and the cylinder head to seal the gap between the cylinder block and the cylinder head.
[0012] Optionally, the suction port and the discharge port are arranged on the same circumference of the cylinder block.
[0013] Optionally, a through groove for limiting the crankshaft is provided on the cylinder head, and the crankshaft passes through the through groove and is connected to the motor.
[0014] Optionally, a pressure valve is provided at the discharge port.
[0015] The present utility model provides a semi-closed refrigerant pump, which includes a cylinder block, a cylinder head, a motor, a crankshaft, a piston and blades. The cylinder head is connected to the cylinder block and is used to jointly define a receiving cavity, and the motor is placed outside the receiving cavity; the piston, the blades and the crankshaft are placed in the receiving cavity; one end of the crankshaft extends out of the receiving cavity and is connected to the motor, and the piston is sleeved outside the crankshaft; a suction port and a discharge port are provided on the cylinder block, and the piston is used to contact the blades and is used to slide in the receiving cavity so that the refrigerant entering the suction port is discharged from the discharge port under the compression of the piston.
[0016] In the semi-closed refrigerant pump provided by the present application, the refrigerant only flows in the accommodation cavity formed by the cylinder block and the cylinder head, that is, the refrigerant only flows inside the cylinder block and will not enter the structures other than the cylinder block. With such a configuration, on the one hand, it can prevent the heat of the external structure of the cylinder block from affecting the heat exchange of the refrigerant, and at the same time, it can avoid the refrigerant from absorbing the heat of the motor and vaporizing after entering the motor, thus improving the refrigeration efficiency of the refrigerant pump; on the other hand, this structure fundamentally isolates the contact between the refrigerant and the terminal, avoiding problems with the insulation and voltage resistance of the terminal due to the contact between the terminal and the refrigerant. In addition, since the motor is separated from the refrigerant, at this time the motor is an external structure of the cylinder block, which helps the heat dissipation of the motor and can improve the reliability of the motor. Description of the Drawings
[0017] Figure 1 It is a front view structural schematic diagram of the refrigerant pump in a preferred embodiment of the present utility model;
[0018] Figure 2 is Figure 1 a longitudinal sectional structural schematic diagram along the A-A connection line in
[0019] Figure 3 is Figure 2 an axial sectional structural schematic diagram along the B-B connection line in, where the arrow a indicates the sliding direction of the piston in the cylinder block;
[0020] Figure 4 It is a top view structural schematic diagram of the cylinder block in a preferred embodiment of the present utility model;
[0021] Figure 5 is Figure 4 a longitudinal sectional structural schematic diagram along the C-C connection line in
[0022] Figure 6 is Figure 5 an axial sectional structural schematic diagram along the D-D connection line in.
[0023] In the figure:
[0024] Cylinder block 11; groove 111; cylinder head 12; accommodation cavity 13; suction port 14; discharge port 15; motor 2; drive shaft 21; crankshaft 3; piston 4; piston gasket 41; vane 5; motor support frame 6; operation window 61; coupling 7; spring 8; positioning member 91; guide groove 92; sealing gasket 10. Detailed Embodiments
[0025] The following further describes the present utility model in detail with reference to the drawings and specific embodiments. According to the following description, the advantages and features of the present utility model will be clearer. It should be noted that the drawings are all in a very simplified form and use non-precise scales, only for the purpose of facilitating and clearly assisting in explaining the embodiments of the present utility model.
[0026] The terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc. indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings. They are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the indicated mechanism or element must have a specific orientation, be constructed and operated in a specific orientation. Therefore, it should not be construed as a limitation to the present invention.
[0027] In the present invention, unless otherwise clearly specified and defined, the terms "mounted", "connected", "fixed", etc. shall be understood in a broad sense. For example, it may be a fixed connection, a detachable connection, or integrated; it may be a mechanical connection, an electrical connection, or communicable with each other; it may be directly connected, or connected through an intermediate medium, and may be the communication inside two elements or the interaction relationship between two elements, unless otherwise clearly defined. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.
[0028] In this article, the term "axial" refers to the direction of the central axis of the motor or cylinder block; the term "radial" refers to the direction perpendicular to the central axis of the motor or cylinder block; the term "circumferential" refers to the direction around the central axis of the motor or cylinder block.
[0029] The following will describe the present invention in detail with reference to the drawings and preferred embodiments. Without conflict, the following embodiments and the features in the embodiments can be mutually supplemented or combined with each other.
[0030] Referring to Figures 1 to 3 As shown, a preferred embodiment of the present invention provides a semi-closed refrigerant pump, which includes a cylinder block 11, a cylinder head 12, a motor 2, a crankshaft 3, a piston 4, and a vane 5. The cylinder head 12 is connected to the cylinder block 11 and is used to jointly define an accommodation cavity 13. The motor 2 is placed outside the accommodation cavity 13. The piston 4, the vane 5, and the crankshaft 3 are placed inside the accommodation cavity 13. One end of the crankshaft 3 extends out of the accommodation cavity 13 and is connected to the motor 2. The piston 4 is sleeved outside the crankshaft 3. The cylinder block 11 is provided with a suction port 14 and a discharge port 15. The piston 4 is used to contact the vane 5 and is used to slide inside the accommodation cavity 13 so that the refrigerant entering the suction port 14 is discharged from the discharge port 15 under the compression of the piston 4.
[0031] Specifically, the motor 2 converts electrical energy into mechanical energy, enabling the crankshaft 3 to obtain torque and rotate. The crankshaft 3 transmits power to the piston 4 and drives the piston 4 to slide within the accommodation cavity 13. After the piston 4 slides, the volume of the accommodation space formed between the piston 4, the cylinder block 11, and the vane 5 changes, thereby compressing the refrigerant that enters from the suction port 14. After the refrigerant obtains a certain pressure, it is discharged from the discharge port 15 of the pump body.
[0032] In the semi-hermetic refrigerant pump provided in the present application, the refrigerant only flows within the accommodation cavity surrounded by the cylinder block 11 and the cylinder head 12, that is, the refrigerant only flows inside the cylinder block 11 and will not enter the structures other than the cylinder block 11. With such a configuration, on the one hand, it can prevent the heat of the external structure of the cylinder block 11 from affecting the heat exchange of the refrigerant, and at the same time, it can avoid the refrigerant from absorbing the heat of the motor 2 and vaporizing after entering the motor 2, improving the refrigeration efficiency of the refrigerant pump; on the other hand, this structure fundamentally isolates the contact between the refrigerant and the terminal post, avoiding problems with the insulation and voltage resistance of the terminal post due to contact with the refrigerant. In addition, since the motor 2 is separated from the refrigerant, at this time, the motor 2 belongs to the external structure of the cylinder block 11, which helps the heat dissipation of the motor 2 and can improve the reliability of the motor 2.
[0033] Preferably, the cylinder block 11 and the cylinder head 12 are locked by bolts to prevent leakage at the contact surface between the cylinder block 11 and the cylinder head 12, and further enable the cylinder block 11 and the cylinder head 12 to form a pressure vessel.
[0034] Refer to Figure 3 and Figure 5 As shown, in a specific embodiment, the shape of the piston 4 is cylindrical, and the outer cylindrical surface of the piston 4 is used to form a kinematic pair with the inner cylindrical surface of the cylinder block 11, enabling the piston 4 to slide on the inner cylindrical surface of the cylinder block 11.
[0035] Preferably, the suction port 14 and the discharge port 15 are arranged on the same circumference of the cylinder block 11, that is, the suction port 14 and the discharge port 15 are provided on the same cross-section of the cylinder block 11. With such a setting, the refrigerant can enter and exit horizontally on the cylinder block 11, avoiding pressure loss caused by the refrigerant entering and exiting in the vertical direction and improving the refrigeration efficiency of the refrigerant pump.
[0036] Furthermore, a through groove (not labeled) for limiting the crankshaft 3 is provided on the cylinder head 12. After the crankshaft 3 passes through the through groove, it is connected to the motor 2. The through groove can define the radial position of the crankshaft 3 and prevent radial displacement of the part of the crankshaft 3 connected to the motor 2.
[0037] Refer to Figure 2As shown, the semi-hermetic refrigerant pump further includes a motor support frame 6. One side of the motor support frame 6 is used to connect to the cylinder head 12, and the other side of the motor support frame 6 is used to connect to the motor 2. The motor support frame 6, the motor 2, and the cylinder head 12 jointly define an operation window 61. The drive shaft 21 of the motor 2 and the crankshaft 3 can both extend into the operation window 61 and are connected by a coupling 7.
[0038] As a specific example, the motor support frame 6 is detachably connected to the motor 2 through a flange. At the same time, the motor support frame 6 is detachably connected to the cylinder head 12 through a flange. As another specific example, the motor support frame 6 can also be connected to the motor 2 and the cylinder head 12 in other ways. For example, the motor support frame 6 can be connected to the motor 2 and the cylinder head 12 by the cooperation of bolts and nuts.
[0039] It should be noted that the operation window 61 is used to adjust the installation position of the motor 2 and the motor support frame 6 to ensure that the axis of the drive shaft 21 of the motor 2 coincides with the axis of the crankshaft 3. When set in this way, the operator can adjust the central coaxiality of the connection part of the drive shaft 21 of the motor 2 and the crankshaft 3 through the operation window 61, and the motor 2 and the crankshaft 3 rotate coaxially.
[0040] Continue to refer to Figure 2 and Figure 3 , the semi-hermetic refrigerant pump further includes a spring 8. One end of the spring 8 is fixed on the cylinder block 11, and the other end of the spring 8 is in contact with the vane 5. After the piston 4 slides, it is used to drive the vane 5 to compress or release the spring 8, thereby realizing the movement of the vane 5 to ensure that the piston 4 is always in contact with one end of the vane 5. Furthermore, the compression of the refrigerant by the piston 4 can be realized through the cooperation of the vane 5 and the piston 4.
[0041] As Figures 2 to 6 shown, in a schematic embodiment, the semi-hermetic refrigerant pump further includes a positioning member 91. A guide groove 92 is provided on the cylinder block 11, and at least part of the vane 5 is placed in the guide groove 92 to ensure that the vane 5 does not tilt in the moving direction. At least part of the positioning member 91 is fixed in the guide groove 92. One end of the spring 8 is connected to the positioning member 91, and the other end of the spring 8 is connected to the vane 5. At this time, the positioning member 91 can be used to limit the position of the spring 8, and the outer cylindrical surface of the piston 4 can push the vane 5 to reciprocate in the guide groove 92.
[0042] In a specific example, the positioning member 91 is a positioning bolt, and a thread matching the positioning bolt is provided in the guide groove 92 so that the positioning bolt is threadedly connected to the guide groove 92. At least part of the spring 8 can be sleeved on the positioning member 91 to realize the fixation of the spring 8. The vane 5 can be in contact with the end of the spring 8 away from the positioning member 91, which is convenient for compressing or releasing the spring 8.
[0043] As Figure 5As shown, as an alternative, the root clearing treatment can be performed on the welded part of the inner wall of the cylinder block 11 to form a groove 111 on the inner wall of the cylinder block 11, so that the piston 4 can better fit the cylindrical inner wall of the cylinder block 11. The material of the cylinder block 11 is preferably a material that is easy to cast and can withstand a certain static pressure and dynamic pressure, such as gray cast iron and cast steel, etc.
[0044] As Figure 2 shown, the semi-hermetic refrigerant pump further includes piston gaskets 41. The number of piston gaskets 41 is preferably multiple. The piston gaskets 41 are respectively arranged between the piston 4 and the cylinder block 11, and between the piston 4 and the cylinder head 12 to seal the gaps between the cylinder block 11 and the piston 4, and between the cylinder head 12 and the piston 4. Specifically, after the cylinder block 11 and the cylinder head 12 are locked, the piston gaskets 41 are deformed, so as to seal the gaps between the piston 4 and the cylinder block 11 and the cylinder head 12. In this way, the piston gaskets 41 can prevent the refrigerant from leaking from the cylinder block 11 to the inside, and improve the sealing performance of the refrigerant pump.
[0045] Continue to refer to Figure 2 shown, the semi-hermetic refrigerant pump further includes a sealing gasket 10. The sealing gasket 10 is arranged between the cylinder block 11 and the cylinder head 12 to seal the gap between the cylinder block 11 and the cylinder head 12.
[0046] More specifically, after the cylinder block 11 and the cylinder head 12 are locked, the sealing gasket 10 is deformed, so that the sealing gasket 10, the cylinder block 11 and the cylinder head 12 are closely fitted under the action of the bolts to prevent the refrigerant from leaking from the inside of the cylinder block 11 to the outside, and further improve the sealing performance of the refrigerant pump.
[0047] Preferably, a pressure valve (not labeled) is provided at the discharge port 15. When the pressure value at the exhaust port 15 reaches a preset value, the pressure valve can be automatically opened to allow the refrigerant to flow out of the cylinder block 11. For the specific structure of the pressure valve, those skilled in the art can understand and configure it according to the prior art, and the present invention will not elaborate on this.
[0048] In summary, the present utility model provides a semi-hermetic refrigerant pump. The refrigerant only flows in the accommodation cavity surrounded by the cylinder block 11 and the cylinder head 12. On the one hand, it can prevent the heat of the external structure of the cylinder block 11 from affecting the heat exchange of the refrigerant, and at the same time, it can avoid the refrigerant from entering the motor 2 and absorbing the heat of the motor 2 to vaporize, improving the refrigeration efficiency of the refrigerant pump; on the other hand, this structure fundamentally isolates the contact between the refrigerant and the terminal post, avoiding problems with the insulation and voltage resistance of the terminal post due to the contact between the terminal post and the refrigerant. In addition, since the motor 2 is separated from the refrigerant, at this time the motor 2 is an external structure of the cylinder block 11, which helps the heat dissipation of the motor 2 and can improve the reliability of the motor 2.
[0049] The above description is only a description of the preferred embodiments of the present utility model and does not limit the scope of the present utility model in any way. Any changes and modifications made by those of ordinary skill in the art of the present utility model based on the above disclosure shall fall within the protection scope of the present utility model.
Claims
1. A semi-hermetic refrigerant pump, characterized in that, It includes a cylinder block, a cylinder head, a motor, a crankshaft, a piston and a vane. The cylinder head is connected to the cylinder block and is used to jointly define a receiving cavity, and the motor is placed outside the receiving cavity; the piston, the vane and the crankshaft are placed inside the receiving cavity; one end of the crankshaft extends out of the receiving cavity and is connected to the motor, and the piston is sleeved outside the crankshaft; a suction port and a discharge port are provided on the cylinder block, and the piston is used to contact the vane and is used to slide inside the receiving cavity so that the refrigerant entering the suction port is discharged from the discharge port under the compression of the piston.
2. The semi-hermetic refrigerant pump according to claim 1, characterized in that, It further includes a motor support frame. One side of the motor support frame is used to be connected to the cylinder head, and the other side of the motor support frame is used to be connected to the motor; the motor support frame, the motor and the cylinder head jointly define an operation window, and the drive shaft of the motor and the crankshaft can both extend into the operation window and are connected by a coupling.
3. The semi-closed refrigerant pump according to claim 1, characterized in that, It further includes a spring. One end of the spring is fixed on the cylinder block, and the other end of the spring contacts the vane. After the piston slides, it is used to drive the vane to compress or release the spring.
4. The semi-hermetic refrigerant pump according to claim 3, characterized in that, It further includes a positioning member. A guiding groove is provided on the cylinder block, and at least part of the vane is placed in the guiding groove; at least part of the positioning member is fixed in the guiding groove, and the one end of the spring is connected to the positioning member.
5. The semi-closed refrigerant pump according to claim 4, wherein The positioning member is a positioning bolt, and a thread matching with the positioning bolt is provided in the guiding groove.
6. The semi-hermetic refrigerant pump according to any one of claims 1-5, characterized in that It further includes piston gaskets. The number of the piston gaskets is multiple, and the piston gaskets are respectively arranged between the piston and the cylinder block, and between the piston and the cylinder head to seal the gaps between the cylinder block and the piston, and between the cylinder head and the piston.
7. The semi-hermetic refrigerant pump according to any one of claims 1-5, characterized in that, It further includes a sealing gasket. The sealing gasket is arranged between the cylinder block and the cylinder head to seal the gap between the cylinder block and the cylinder head.
8. The semi-hermetic refrigerant pump according to any one of claims 1-5, characterized in that, The suction port and the discharge port are arranged on the same circumference of the cylinder block.
9. The semi-hermetic refrigerant pump according to any one of claims 1-5, characterized in that, A through groove for limiting the crankshaft is provided on the cylinder head, and the crankshaft passes through the through groove and is connected to the motor.
10. The semi-hermetic refrigerant pump according to any one of claims 1-5, characterized in that, A pressure valve is provided at the discharge port.