Vacuum pump with energy-saving mode

Abstract

The utility model belongs to the technical field of vacuum pumps, and particularly relates to a vacuum pump with an energy-saving mode. In order to overcome the defect that the rotating speed of a motor of an existing variable-speed vacuum pump is adjusted through a frequency converter according to the vacuum degree detected by a sensor, the technical scheme is that the vacuum pump with the energy-saving mode comprises a pump body; the motor is a controller; the speed regulation assembly comprises a trigger switch connected with the controller; when the controller receives a signal of the trigger switch, the controller adjusts the rotating speed of the motor, so that the vacuum pump is switched between a rated rotating speed mode and a low-rotating-speed energy-saving mode. The vacuum pump with the energy-saving mode has the advantages that the vacuum pump is switched between the rated rotating speed mode and the low-rotating-speed energy-saving mode, energy consumption of a motor is reduced, and the service life of the motor is prolonged; a mode of manually operating the trigger switch is adopted to replace a mode according to a sensor signal, the sensor does not need to be connected with the controller, and an interface adaptation problem does not exist.

Description

Technical Field

[0001] The utility model belongs to the technical field of vacuum pumps, and in particular relates to a vacuum pump with an energy-saving mode. Background Art

[0002] In the actual use of vacuum pumps, it is usually necessary to quickly evacuate the vacuum when starting up. After reaching the required vacuum level, the vacuum pump will only be used as a maintenance pump and enter the vacuum maintenance stage. In some cases, the vacuum pump's quick evacuation time is generally short (usually within half an hour), but the vacuum maintenance time will be very long (usually several hours), sometimes even for several months.

[0003] At present, most vacuum pumps on the market run at a fixed speed, that is, whether in the rapid vacuuming stage or the vacuum maintenance stage, the vacuum pump runs at the rated speed. If the vacuum pump runs at the rated speed of rapid vacuuming during the vacuum maintenance stage, it will not only waste electricity, but also generate loud noise and shorten its service life.

[0004] For this reason, speed-controlled vacuum pumps have emerged. Speed-controlled vacuum pumps are improved on the basis of fixed-speed vacuum pumps, adding speed-controlled signal trigger structures and improving speed programs. Most of the existing speed-controlled vacuum pumps detect the vacuum degree through sensors and adjust the speed according to the sensor signals. Although this method does not require manual intervention, it is necessary to solve the connection problem between the sensor and the controller, and its applicability is low for certain occasions (such as maintaining vacuum for a long time). In addition, most variable-speed vacuum pumps control the motor speed through a frequency converter. Although the frequency converter control solution can change the motor speed, the frequency converter is expensive, large in size, requires external installation, and difficult to operate, which is not friendly to non-professional users. Summary of the invention

[0005] The utility model aims at the deficiency that the frequency converter of the existing variable speed vacuum pump adjusts the motor speed according to the vacuum degree detected by the sensor, and provides a vacuum pump with energy saving mode, adopts a new way to control the motor speed, and is particularly suitable for occasions where frequent adjustment is not required. Furthermore, a non-frequency converter controller is adopted.

[0006] To achieve the above purpose, the utility model adopts the following technical solution: a vacuum pump with an energy-saving mode, the vacuum pump with an energy-saving mode comprises:

[0007] Pump body;

[0008] Motor:

[0009] Controller;

[0010] A speed regulating assembly, including a trigger switch connected to the controller;

[0011] When the controller receives a signal from the trigger switch, the controller adjusts the speed of the motor to switch the vacuum pump between a rated speed mode and a low speed energy-saving mode.

[0012] The vacuum pump with energy-saving mode of the present invention comprises a speed regulating component with a trigger switch. When the vacuum pump enters the vacuum maintaining stage, the trigger switch can be manually operated, and the controller receives the signal of the trigger switch, adjusts (reduces in this case) the speed of the motor, and switches the vacuum pump to the energy-saving mode; when the vacuum pump needs to evacuate quickly, the trigger switch can be operated, and the controller receives the signal of the trigger switch, adjusts (increases in this case) the speed of the motor, and switches the vacuum pump to the rated speed mode; compared with the method in which the controller adjusts the speed according to the vacuum degree signal detected by the sensor, by manually operating the trigger switch (although it is necessary to observe the vacuum degree information detected by the sensor), the sensor does not need to be connected to the controller, and there is no need to reserve a sensor interface on the controller, and there is no need to consider the adaptation problem between the interface on the controller and the sensor. The operation is more convenient, and distortion in the sensor signal transmission process can be avoided, which is more reliable.

[0013] As an improvement, the speed regulation component further comprises a signal light, and when the vacuum pump operates in a rated speed mode and an energy-saving mode, the state of the signal light is different.

[0014] As an improvement, the vacuum pump also includes a shell, which has a button hole and a light guide hole. The speed regulation component also includes a light guide tube, which guides the light emitted by the signal lamp to the light guide hole. A light-transmitting film is provided outside the button hole and the light guide hole. The speed regulation component is fixed to the shell by screws.

[0015] As an improvement, the trigger switch is a push button switch; and / or, there is only one trigger switch.

[0016] As an improvement, the controller includes a single chip microcomputer.

[0017] As an improvement, the single chip microcomputer is provided with four ports, including a ground port, a power supply port and two signal ports.

[0018] As an improvement, the controller is provided with three chip resistors, the three chip resistors are respectively connected to the power supply port and the two signal ports, and the resistance values ​​of the three chip resistors are not less than 500Ω.

[0019] As an improvement, the resistance value of the chip resistor is 800Ω to 2000Ω.

[0020] As an improvement, the vacuum pump further comprises a shell, the trigger switch is arranged on the top wall of the shell, and the controller is arranged in the shell.

[0021] As an improvement, the controller controls the motor speed by pulse width modulation technology.

[0022] The beneficial effects of the vacuum pump with energy-saving mode of the utility model are as follows: a speed regulating component with a trigger switch is adopted, and when the vacuum pump enters the vacuum maintaining stage, the trigger switch can be operated, and the controller receives the signal of the trigger switch, and adjusts (at this time, reduces) the speed of the motor, so that the vacuum pump switches to the energy-saving mode; when the vacuum pump needs to evacuate quickly, the trigger switch can be operated, and the controller receives the signal of the trigger switch, and adjusts (at this time, increases) the speed of the motor, so that the vacuum pump switches to the rated speed mode; compared with the method in which the controller automatically adjusts according to the vacuum degree detected by the sensor, by manually operating the trigger switch for adjustment (first observing the vacuum degree and then), the sensor does not need to be connected to the controller, and there is no need to reserve a sensor interface on the controller, and there is no need to consider the adaptation problem between the interface on the controller and the sensor, and the operation is more convenient. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 It is a schematic structural diagram of the vacuum pump of the first embodiment of the utility model.

[0024] Figure 2 It is a schematic diagram of the structure of the vacuum pump of the first embodiment of the utility model after some components are hidden.

[0025] Figure 3 This is a schematic diagram of the structure of a portion of the housing of the motor of the vacuum pump of the first embodiment of the utility model.

[0026] Figure 4 It is a structural schematic diagram of the speed regulating assembly of the vacuum pump of the first embodiment of the utility model.

[0027] Figure 5 It is a speed regulation structure block diagram of the vacuum pump of the first embodiment of the utility model.

[0028] Figure 6 It is a circuit schematic diagram of the speed regulating component of the controller of the vacuum pump in the first embodiment of the utility model.

[0029] Figure 7 It is a circuit schematic diagram of the speed regulating component of the vacuum pump of the first embodiment of the utility model.

[0030] In the figure, 1. pump body;

[0031] 2. Motor; 21. Controller; 22. Speed ​​regulating assembly; 221. Trigger switch; 222. Light guide tube; 223. Transparent film; 224. Signal light; 23. Housing; 231. Key hole; 232. Light guide hole. DETAILED DESCRIPTION

[0032] The technical solutions of the embodiments of the present invention are explained and described below, but the following embodiments are only preferred embodiments of the present invention, not all. Based on the embodiments in the implementation mode, other embodiments obtained by those skilled in the art without creative work are all within the protection scope of the present invention.

[0033] Embodiment 1

[0034] See also Figures 1 to 7 , the vacuum pump with energy-saving mode of the first embodiment of the utility model, the vacuum pump with energy-saving mode comprises:

[0035] Pump body;

[0036] Motor 2:

[0037] Controller 21;

[0038] The speed regulating assembly 22 includes a trigger switch 221 connected to the controller 21;

[0039] When the controller 21 receives a signal from the trigger switch 221 , the controller 21 adjusts the rotation speed of the motor 2 to switch the vacuum pump between a rated rotation speed mode and a low rotation speed energy-saving mode.

[0040] In this embodiment, the trigger switch 221 is a push button switch, which is a mechanical switch that is stable and reliable.

[0041] In this embodiment, there is only one trigger switch 221, and the vacuum pump is switched between the rated speed mode and the low speed energy-saving mode by pressing the same trigger switch 221. In other embodiments, two trigger switches 221 may be provided, one for switching from the rated speed mode to the energy-saving mode, and the other for switching from the energy-saving mode to the rated speed mode. In other embodiments, two trigger switches 221 may also be provided, and the two trigger switches 221 are respectively used to switch to energy-saving mode 1 and energy-saving mode 2. In different energy-saving modes, the speed of the motor 2 is different, such as the rated speed is 1440r / min, the energy-saving mode 1 is 144r / min, and the energy-saving mode 2 is 288r / min.

[0042] In this embodiment, the controller 21 includes a single chip microcomputer.

[0043] In this embodiment, the single chip microcomputer is provided with four ports, including a ground port, a power supply port and two signal ports. The power supply port is generally 5VS or 3.3VS.

[0044] In this embodiment, the controller 21 is provided with three chip resistors (R17, R18, R37), the three chip resistors are respectively connected to the power supply port and the two signal ports, and the resistance values ​​of the three chip resistors are not less than 500Ω. After the speed regulating component 22 is added, electromagnetic interference is found in the actual test, so the corresponding chip resistor is redesigned. After increasing the resistance value of the chip resistor, the electromagnetic compatibility (EMC) requirements can be met.

[0045] In this embodiment, the resistance value of the chip resistor is 800Ω to 2000Ω. More specifically, the resistance value of the three chip resistors is 1000Ω.

[0046] In this embodiment, the vacuum pump further comprises a housing 23, the trigger switch 221 is arranged on the top wall of the housing 23, and the controller 21 is arranged in the housing 23. The trigger switch 221 is arranged on the top wall of the housing 23, and is easy to operate.

[0047] In this embodiment, the speed regulating assembly 22 is fixed to the housing 23 of the motor 2 by a plurality of screws from bottom to top. The speed regulating assembly 22 is located below the top wall of the housing 23, so that no additional space is occupied.

[0048] In this embodiment, the controller 21 is fixed to the heat dissipation fins of the motor 2 by a plurality of screws from top to bottom. The controller 21 is located above the main body of the motor 2. The controller 21 is arranged horizontally. The connector of the speed regulating component 22 is vertically inserted into the port of the controller 21.

[0049] In this embodiment, the controller 21 controls the speed of the motor 2 through pulse width modulation (PWM) technology. The pulse width modulation technology is a prior art and will not be described in detail here.

[0050] In this embodiment, the controller 21 adopts a non-inverter type controller, which is only used for the rated speed regulation of the vacuum pump and cannot achieve inverter compatibility. It is more simplified in hardware and software and can be easily integrated into the housing 23.

[0051] The working principle of the vacuum pump with energy-saving mode of the utility model is: when the power switch is turned on, the vacuum pump enters the rated speed mode by default. When the vacuum pump has been working for a period of time and enters the vacuum maintenance stage, the trigger switch 221 can be operated (press the button switch), and the controller 21 receives the signal of the trigger switch 221, reduces the speed of the motor 2, and switches the vacuum pump to the energy-saving mode. At this time, the green signal light 224 is on (it is best if the signal of the signal light 224 comes from the controller 21, but it can also come directly from the trigger switch 221); when the vacuum pump needs to be evacuated quickly, the trigger switch 221 can be operated, and the controller 21 receives the signal of the trigger switch 221, increases the speed of the motor 2, and switches the vacuum pump to the rated speed mode. At this time, the signal light 224 is off.

[0052] The beneficial effects of the vacuum pump with energy-saving mode of the first embodiment of the utility model are as follows: the motor 2 of the vacuum pump adopts a non-inverter controller 21, and is provided with a speed regulating component 22 with a trigger switch 221. When the vacuum pump enters the vacuum maintaining stage, the trigger switch 221 can be operated, and the controller 21 receives the signal of the trigger switch 221, and adjusts (at this time, reduces) the speed of the motor 2, so that the vacuum pump switches to the energy-saving mode, and the signal light 224 is on and green; when the vacuum pump needs to evacuate quickly, the trigger switch 221 can be operated, and the controller 21 receives the signal of the trigger switch 221, and adjusts (at this time, increases) the speed of the motor 2, so that the vacuum pump switches to the rated speed mode, and the signal light 224 is off; the vacuum pump can switch between the rated speed mode and the low-speed energy-saving mode, which can reduce energy consumption. , reduce noise and extend service life; manually operate the trigger switch 221 to adjust the speed. Compared with the controller automatically adjusting the speed according to the vacuum degree detected by the sensor, the controller adjusts the speed according to the signal of the trigger switch 221, eliminating the connection process between the sensor and the controller, making the operation more convenient, and avoiding distortion in the sensor signal transmission process, which is more reliable; a signal light 224 is set to intuitively know the speed status of the vacuum pump motor; a non-inverter controller 21 is used to adjust the speed of the motor 2, which has the following advantages compared to the inverter: 1. Lower cost and more competitive products; 2. The controller 21 and the speed regulating component 22 are installed in the motor 2 housing 23, which does not take up extra space and has a small size; 3. Easy to operate and friendly to non-professionals; 4. Light weight and low energy consumption.

[0053] The above is only a specific implementation of the invention, but the protection scope of the invention is not limited thereto. Those skilled in the art should understand that the invention includes but is not limited to the contents described in the above specific implementation. Any modification that does not deviate from the functional and structural principles of the invention will be included in the scope of the claims.

Claims

1. A vacuum pump with energy-saving mode, characterized in that: The vacuum pump with energy-saving mode comprises: Pump body; Motor (2): Controller (21); A speed regulating assembly (22), comprising a trigger switch (221) connected to the controller (21); When the controller (21) receives a signal from a trigger switch (221), the controller (21) adjusts the rotation speed of the motor so that the vacuum pump switches between a rated rotation speed mode and a low rotation speed energy-saving mode.

2. The vacuum pump with energy-saving mode according to claim 1, characterized in that: The speed regulating component (22) further comprises a signal light (224). When the vacuum pump operates in a rated speed mode and an energy-saving mode, the status of the signal light (224) is different.

3. The vacuum pump with energy-saving mode according to claim 2, characterized in that: The vacuum pump further comprises a housing (23), the housing (23) being provided with a key hole (231) and a light guide hole (232), the speed regulating assembly (22) further comprising a light guide tube (222), the light guide tube (222) guiding light emitted by a signal lamp (224) to the light guide hole (232); a light-transmitting film (223) is provided outside the key hole (231) and the light guide hole (232); and the speed regulating assembly (22) is fixed to the housing (23) by means of screws.

4. The vacuum pump with energy-saving mode according to claim 1, characterized in that: The trigger switch (221) is a push button switch; and / or, There is only one trigger switch (221).

5. The vacuum pump with energy-saving mode according to claim 1, characterized in that: The controller (21) comprises a single chip microcomputer.

6. The vacuum pump with energy-saving mode according to claim 5, characterized in that: The single chip microcomputer is provided with four ports, including a grounding port, a power supply port and two signal ports.

7. The vacuum pump with energy-saving mode according to claim 5, characterized in that: The controller (21) is provided with three chip resistors, the three chip resistors are respectively connected to a power supply port and two signal ports, and the resistance values ​​of the three chip resistors are not less than 500Ω.

8. The vacuum pump with energy-saving mode according to claim 7, characterized in that: The resistance value of the chip resistor is 800Ω to 2000Ω.

9. The vacuum pump with energy-saving mode according to claim 1, characterized in that: The vacuum pump further comprises a housing (23), the trigger switch (221) is arranged on the top wall of the housing (23), and the controller (21) is arranged in the housing (23).

10. The vacuum pump with energy-saving mode according to claim 1, characterized in that: The controller (21) controls the motor speed by means of pulse width modulation technology; the controller (21) is a non-inverter type controller.

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