Horizontal direct-current variable-frequency high-pressure cavity vortex pump

Abstract

The utility model relates to the technical field of pump equipment, in particular to a horizontal direct-current variable-frequency high-pressure cavity vortex pump. The horizontal direct-current variable-frequency high-pressure cavity scroll pump is used for conveying an incompressible liquid working medium and comprises a static scroll plate and a dynamic scroll plate which are connected in a meshed mode, and the dynamic scroll plate can rotate and translate relative to the static scroll plate. An open suction cavity is defined between the movable scroll plate and the static scroll plate to suck a liquid working medium, and the suction cavity can be converted into a closed cavity and carries the liquid working medium to be pushed towards the central area of the static scroll plate so that the liquid working medium can be discharged through a first discharging opening in the middle of the static scroll plate. The disc body of the static scroll disc is provided with a first sinking groove communicated with the first discharge port, and the suction cavity is communicated with the first discharge port through the first sinking groove after being converted into the closed cavity, so that liquid is discharged in time, and the situation that the dynamic scroll disc and the static scroll disc are damaged due to the fact that an incompressible liquid working medium cannot be discharged in time is avoided; and safe and reliable conveying of the incompressible liquid working medium is achieved.

Description

Technical Field

[0001] This application relates to the technical field of pump equipment, and in particular to a horizontal direct-current variable-frequency high-pressure chamber scroll pump. Background Art

[0002] In a heat pump system or a computer room air-conditioning system, a fluorine pump is usually arranged to be used in combination with a compressor. For example, in a heat pump system, an additional fluorine pump is connected in parallel with the compressor. When entering the defrosting mode of operation under low-temperature conditions, the compressor is turned off and the fluorine pump operates for defrosting to ensure the reliability of the heat pump system. Another example is in a computer room air-conditioning system, where an additional fluorine pump circulation loop is added. Since the computer room air-conditioning system needs to provide cooling for indoor equipment throughout the year, when the outdoor temperature is lower than the indoor temperature in spring, autumn or winter, the fluorine pump circulation loop is started to make full use of the outdoor natural cooling resources to cool the indoor equipment, achieving the purpose of energy conservation and emission reduction.

[0003] For current fluorine pumps, since the refrigerant transported is an incompressible fluid, centrifugal pumps are generally used. However, due to the structure of centrifugal pumps themselves, their speed range is relatively narrow, the operating speed is relatively low, which cannot meet the requirements of rapid changes in working conditions, and the generated pressure will fluctuate, unable to meet higher precision requirements. Cavitation is also likely to occur during use, affecting the flow rate and head. Traditional scroll pumps are generally not used to transport incompressible fluids because when transporting incompressible fluids, there cannot be an obvious compression process in the scroll disk. If the fluid cannot be discharged in time, it is easy to cause damage to the scroll disk. Summary of the Utility Model

[0004] The purpose of the present utility model is to provide a horizontal direct-current variable-frequency high-pressure chamber scroll pump for transporting incompressible fluids.

[0005] The present utility model provides a horizontal direct-current variable-frequency high-pressure chamber scroll pump for transporting incompressible liquid working medium; the horizontal direct-current variable-frequency high-pressure chamber scroll pump includes a moving scroll disk and a stationary scroll disk;

[0006] The moving scroll disk and the stationary scroll disk are meshed and connected, and the moving scroll disk can perform a rotary translation relative to the stationary scroll disk, so that an open suction chamber is formed between the moving scroll disk and the stationary scroll disk to suck the liquid working medium, and the suction chamber can be converted into a closed chamber and advanced towards the central region of the stationary scroll disk to discharge the liquid working medium from a first discharge port in the middle of the disk body of the stationary scroll disk.

[0007] One side of the disk body of the stationary scroll disk facing the moving scroll disk is provided with a first sunken groove. The first sunken groove extends a predetermined length along the scroll direction of the stationary scroll circle of the stationary scroll disk, and one end of the first sunken groove is communicated with the first discharge port, so that when the suction cavity is converted from an open state to a closed chamber, the closed chamber is communicated with the first discharge port through the first sunken groove.

[0008] Further, the first sunken groove is gradually expanding from the end far away from the first discharge port to the end facing the first discharge port.

[0009] Further, one side of the disk body of the moving scroll disk facing the stationary scroll disk is provided with a second sunken groove, and the second sunken groove is opposite to the first discharge port.

[0010] Further, the second sunken groove is located in the semi-circular area formed by the scroll circle of the moving scroll disk extending outward from the scroll center starting point.

[0011] Further, the first sunken groove and / or the second sunken groove is gradually expanding from its own groove opening to the groove bottom.

[0012] Further, the longitudinal section of the first sunken groove and / or the second sunken groove is trapezoidal.

[0013] Further, the horizontal direct-current variable-frequency high-pressure chamber scroll pump further includes a housing and a frame. The frame is arranged in the housing and divides the housing into a first chamber and a second chamber;

[0014] The moving scroll disk and the stationary scroll disk are both arranged in the first chamber. The stationary scroll disk is fixedly connected to the frame, and the moving scroll disk is limited between the stationary scroll disk and the frame.

[0015] Further, the stationary scroll disk is provided with a first suction port, and the first suction port is communicated with the suction cavity;

[0016] The housing is provided with a second suction port and a second discharge port. The second suction port is communicated with the first suction port to supply the liquid working medium outside the housing to enter the suction cavity, and the second discharge port is communicated with the first discharge port to supply the liquid working medium to discharge from the housing.

[0017] Further, a motor and a crankshaft are arranged in the second chamber. One end of the crankshaft is connected to the driving end of the motor, and the other end of the crankshaft passes through the frame and is connected to the moving scroll disk.

[0018] Further, the motor is a direct-current variable-frequency motor.

[0019] Compared with the prior art, the beneficial effects of the present utility model are as follows:

[0020] The horizontal DC variable-frequency high-pressure chamber scroll pump provided by the present utility model is used to transport incompressible liquid working medium, and includes a stationary scroll plate and a moving scroll plate. The stationary scroll plate is fixedly arranged, and the moving scroll plate is meshed and connected with the stationary scroll plate, and the moving scroll plate can perform rotary translation relative to the stationary scroll plate. A plurality of chambers are defined between the scroll coils (moving scroll coils) of the moving scroll plate and the scroll coils (stationary scroll coils) of the stationary scroll plate. The plurality of chambers include a suction chamber, and the suction chamber is open. As the moving scroll plate rotates, the suction chamber can suck the liquid working medium and convert it into a closed chamber. The closed chamber will carry the liquid working medium and advance from the outside to the inside along the scroll direction of the stationary scroll coil towards the central area of the stationary scroll plate, so that the liquid working medium is discharged from the first row of outlets in the middle of the plate body of the stationary scroll plate.

[0021] A first sink is provided on the side of the plate body of the stationary scroll plate facing the moving scroll plate. One end of the first sink is communicated with the first row of outlets, and the other end of the first sink extends a predetermined length along the scroll direction of the stationary scroll coil, so that after the suction chamber is converted into a closed chamber, it can be communicated with the first row of outlets through the first sink, thereby discharging the liquid in time, to a certain extent avoiding damage to the moving scroll plate and the stationary scroll plate caused by the incompressible liquid working medium not being discharged in time, and realizing the safe and reliable transportation of the incompressible liquid working medium. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] In order to more clearly illustrate the specific embodiments of the present utility model or the technical solutions in the prior art, the following will briefly introduce the drawings required for use in the description of the specific embodiments or the prior art. Obviously, the following drawings are some embodiments of the present utility model. For those of ordinary skill in the art, without creative efforts, other drawings can also be obtained based on these drawings.

[0023] Figure 1 It is a partial structural schematic diagram of the horizontal DC variable-frequency high-pressure chamber scroll pump provided by the embodiment of the present utility model;

[0024] Figure 2 It is a structural schematic diagram of the stationary scroll plate provided by the embodiment of the present utility model from the first perspective;

[0025] Figure 3 It is a structural schematic diagram of the stationary scroll plate provided by the embodiment of the present utility model from the second perspective;

[0026] Figure 4 It is a cross-sectional schematic diagram of the first sink of the stationary scroll plate provided by the embodiment of the present utility model;

[0027] Figure 5 It is a structural schematic diagram of the moving scroll plate provided by the embodiment of the present utility model;

[0028] Figures 6 to 9Shows the conveying process of the liquid working medium of the horizontal DC variable-frequency high-pressure chamber scroll pump provided by the embodiment of the present utility model.

[0029] Reference numerals:

[0030] 1 - stationary scroll plate, 11 - first row of outlets, 12 - first suction inlet, 13 - first sink, 2 - moving scroll plate, 21 - second sink, 3 - frame, 4 - crankshaft, 5 - suction chamber, 6 - closed chamber. Detailed implementation manners

[0031] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are some, but not all, of the embodiments of the present utility model.

[0032] Generally, the components of the embodiments of the present utility model described and shown in the drawings here can be arranged and designed in various different configurations. Therefore, the following detailed description of the embodiments of the present utility model provided in the drawings is not intended to limit the scope of the claimed present utility model, but merely represents the selected embodiments of the present utility model.

[0033] Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present utility model.

[0034] In the description of the present utility model, it should be noted that the orientation or positional relationship indicated by the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc. is based on the orientation or positional relationship shown in the drawings, and is only for the convenience of describing the present utility model and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation to the present utility model. In addition, the terms "first", "second", "third" are only used for descriptive purposes and cannot be understood as indicating or implying relative importance.

[0035] In the description of the present utility model, it should be noted that unless otherwise clearly specified and limited, the terms "installed", "connected", "connected" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium, and it can be the communication inside two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the present utility model can be understood according to specific situations.

[0036] Next, refer to Figures 1 to 9 Describe the horizontal DC variable-frequency high-pressure chamber scroll pump according to some embodiments of the present application.

[0037] The present application provides a horizontal direct-current variable-frequency high-pressure chamber scroll pump for transporting incompressible liquid working medium, such as being used as a fluorine pump in a heat pump system or a computer room air-conditioning system.

[0038] As Figure 1 , Figure 2 and Figure 5 shown, the horizontal direct-current variable-frequency high-pressure chamber scroll pump provided by the present application includes a stationary scroll plate 1 and a moving scroll plate 2. The stationary scroll plate 1 is fixedly arranged, and the moving scroll plate 2 is meshed and connected with the stationary scroll plate 1, and the moving scroll plate 2 can perform a rotary translation relative to the stationary scroll plate 1. Combining Figures 6 to 9 shown, a plurality of chambers are defined between the scroll coils (moving scroll coils) of the moving scroll plate 2 and the scroll coils (stationary scroll coils) of the stationary scroll plate 1. The plurality of chambers include a suction chamber 5. The suction chamber 5 is located at the tail end of the stationary scroll coil far from its central starting point. The suction chamber 5 is open. As the moving scroll plate 2 rotates, the cavity volume of the suction chamber 5 becomes larger to form a negative pressure for sucking the liquid working medium to be transported until the suction chamber 5 becomes a closed chamber 6 and a new suction chamber 5 is formed. After the suction chamber 5 is converted into the closed chamber 6, it will carry the liquid working medium and advance from the outside to the inside along the scroll direction of the stationary scroll coil towards the central region of the stationary scroll plate 1; a through first discharge port 11 is provided in the middle of the disk body of the stationary scroll plate 1. The closed chamber 6 can be advanced inward to be connected with the first discharge port 11 to discharge the liquid working medium through the first discharge port 11, so as to realize the suction and discharge of the liquid working medium.

[0039] As Figures 2 to 4 shown, a first sinking groove 13 is provided on the side of the disk body of the stationary scroll plate 1, i.e., the stationary disk body, facing the moving scroll plate 2. One end of the first sinking groove 13 is connected with the first discharge port 11, and the other end of the first sinking groove 13 extends a predetermined length along the scroll direction of the stationary scroll coil, so that after the suction chamber 5 is converted into the closed chamber 6, it can be connected with the first discharge port 11 through the first sinking groove 13 for liquid discharge. Since the horizontal direct-current variable-frequency high-pressure chamber scroll pump of the present application is used to transport incompressible liquid working medium, there cannot be an obvious compression process between the moving scroll plate 2 and the stationary scroll plate 1. During the process that the suction chamber 5 becomes the closed chamber 6 and continuously advances inward, the cavity volume gradually becomes smaller. By providing the first sinking groove 13, liquid can be discharged after the suction chamber 5 is converted into the closed chamber 6, so as to avoid damage to the moving scroll plate 2 and the stationary scroll plate 1 caused by the inability of the incompressible liquid working medium to be discharged in time to a certain extent, and realize the safe and reliable transportation of the incompressible liquid working medium.

[0040] Refer to Figures 6 to 9 to describe the transportation process of the liquid working medium. As Figure 6 shown, an open suction chamber 5 is formed between the moving scroll coils of the moving scroll plate 2 and the stationary scroll coils of the stationary scroll plate 1; as the moving scroll plate 2 rotates to as Figure 7At the position shown, the suction chamber 5 is closed and converted into a closed chamber 6; as the moving scroll disk 2 rotates from the position shown by Figure 7 to the position shown by Figure 8 , during this process, the closed chamber 6 communicates with the first sink 13 and discharges liquid through the first sink 13 and the first discharge port 11; as the moving scroll disk 2 rotates from the position shown by Figure 8 to the position shown by Figure 9 , the closed chamber 6 directly communicates with the first discharge port 11 for liquid discharge.

[0041] In this embodiment, preferably, as shown by Figure 2 , the first sink 13 is gradually expanding from the outside to the inside along the vortex direction of the stationary scroll ring, that is, the first sink 13 is gradually expanding from the end far away from the first discharge port 11 to the end facing the first discharge port 11. Thus, as the closed chamber 6 continuously advances inward, the volume of the chamber continuously decreases, and the volume of the first sink 13 communicating with the closed chamber 6 continuously increases, thereby increasing the liquid discharge rate to timely discharge the incompressible liquid.

[0042] In this embodiment, preferably, as shown by Figure 4 , the first sink 13 is gradually expanding from its own notch to the bottom, for example, the longitudinal section of the first sink 13 is trapezoidal, thereby increasing the flow-through cross-section of the first sink 13 to facilitate increasing the liquid discharge rate.

[0043] In an embodiment of the present application, preferably, as shown by Figure 5 , a second sink 21 is provided on the side of the disk body of the moving scroll disk 2, i.e., the moving disk body, facing the stationary scroll disk 1, and the second sink 21 is opposite to the first discharge port 11; preferably, the second sink 21 is located within the semi-circular region formed by the moving scroll ring extending outward from the vortex center starting point. Thus, when the closed chamber 6 advances inward to communicate with the second sink 21, the chamber volume can be increased to a certain extent, and it is convenient to timely discharge the incompressible liquid working medium to avoid damage to the moving scroll disk 2 and the stationary scroll disk 1.

[0044] In this embodiment, preferably, the second sink 21 is gradually expanding from the notch to the bottom, for example, the longitudinal section of the second sink 21 is trapezoidal, thereby increasing the volume and the flow-through cross-section of the second sink 21 to facilitate increasing the liquid discharge rate.

[0045] In an embodiment of the present application, preferably, as shown by Figure 1 , the horizontal direct-current variable-frequency high-pressure chamber scroll pump further includes a housing and a frame 3. The frame 3 is arranged inside the housing, so that the space inside the housing is divided into a first chamber and a second chamber. The moving scroll disk 2 and the stationary scroll disk 1 are both located in the first chamber, and the stationary scroll disk 1 is fixed on the frame 3. The moving scroll disk 2 is limited between the frame 3 and the stationary scroll disk 1 and can perform a rotary translation relative to the stationary scroll disk 1.

[0046] Specifically, a motor and a crankshaft 4 are provided in the second chamber. One end of the crankshaft 4 is connected to the driving end of the motor, and the other end of the crankshaft 4 passes through the frame 3 and is connected to the moving scroll disk 2, so as to drive the moving scroll disk 2 to rotate through the motor, enabling the moving scroll disk 2 to perform a rotational translation relative to the stationary scroll disk 1.

[0047] Preferably, the motor is a DC variable-frequency motor, which has a wide speed range and can adapt to the requirements of rapid changes in working conditions.

[0048] Preferably, a second suction port is provided on the housing, and a first suction port 12 is provided on the stationary scroll disk 1. The second suction port is connected to the suction chamber 5 through the first suction port 12, enabling the liquid refrigerant outside the housing to be sucked into the suction chamber 5; a second discharge port may also be provided, and the second discharge port is connected to the first discharge port 11 of the stationary scroll disk 1, enabling the liquid refrigerant to be discharged from the housing through the second discharge port.

[0049] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit it; although the present invention has been described in detail with reference to the foregoing embodiments, those of ordinary skill in the art should understand that they can still modify the technical solutions described in the foregoing embodiments, or perform equivalent replacements on some or all of the technical features; and these modifications or replacements do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of the present invention.

Claims

1. A horizontal DC variable frequency high-pressure chamber scroll pump for transporting incompressible liquid working medium; characterized in that, The horizontal direct-current variable-frequency high-pressure chamber scroll pump includes a moving scroll plate and a stationary scroll plate; The moving scroll plate and the stationary scroll plate are meshed and connected, and the moving scroll plate can perform a rotary translation relative to the stationary scroll plate, so as to form an open suction chamber between the moving scroll plate and the stationary scroll plate to suck the liquid working medium, and the suction chamber can be converted into a closed chamber and advance towards the central region of the stationary scroll plate to discharge the liquid working medium from a first discharge port in the middle of the plate body of the stationary scroll plate; A first sinking groove is provided on one side of the plate body of the stationary scroll plate facing the moving scroll plate. The first sinking groove extends a predetermined length along the scroll direction of the stationary scroll of the stationary scroll plate, and one end of the first sinking groove is communicated with the first discharge port, so that when the suction chamber is converted from open to a closed chamber, the closed chamber is communicated with the first discharge port through the first sinking groove.

2. The horizontal DC variable frequency high-pressure chamber scroll pump according to claim 1, wherein The first sinking groove is gradually expanding from the end far away from the first discharge port to the end facing the first discharge port.

3. The horizontal DC variable frequency high-pressure chamber scroll pump according to claim 1, wherein, A second sinking groove is provided on one side of the plate body of the moving scroll plate facing the stationary scroll plate, and the second sinking groove is opposite to the first discharge port.

4. The horizontal DC variable-frequency high-pressure chamber scroll pump according to claim 3, characterized in that, The second sinking groove is located in a semi-circular area formed by the scroll of the moving scroll plate extending outwards from the starting point of the scroll center.

5. The horizontal DC variable frequency high-pressure chamber scroll pump according to claim 3, characterized in that, The first sinking groove and / or the second sinking groove is gradually expanding from its notch to the bottom of the groove.

6. The horizontal DC variable-frequency high-pressure chamber scroll pump according to claim 5, wherein, The longitudinal section of the first sinking groove and / or the second sinking groove is trapezoidal.

7. The horizontal DC variable frequency high-pressure chamber scroll pump according to claim 1, characterized in that, The horizontal direct-current variable-frequency high-pressure chamber scroll pump further includes a housing and a frame. The frame is arranged in the housing and divides the housing into a first chamber and a second chamber; The moving scroll plate and the stationary scroll plate are both arranged in the first chamber. The stationary scroll plate is fixedly connected to the frame, and the moving scroll plate is limited between the stationary scroll plate and the frame.

8. The horizontal DC variable frequency high-pressure chamber scroll pump according to claim 7, characterized in that, The stationary scroll plate is provided with a first suction port, and the first suction port is communicated with the suction chamber; The housing is provided with a second suction port and a second discharge port. The second suction port is communicated with the first suction port to supply the liquid working medium outside the housing to enter the suction chamber, and the second discharge port is communicated with the first discharge port to supply the liquid working medium to discharge from the housing.

9. The horizontal DC variable-frequency high-pressure chamber scroll pump according to claim 7, characterized in that, A motor and a crankshaft are arranged in the second chamber. One end of the crankshaft is connected to the driving end of the motor, and the other end of the crankshaft passes through the frame and is connected to the moving scroll plate.

10. The horizontal DC variable-frequency high-pressure chamber scroll pump according to claim 9, characterized in that, The motor is a direct-current variable-frequency motor.

Images