A multifunctional pump with adjustable working pressure

Abstract

The present invention belongs to the field of pump technology, and specifically relates to a multifunctional pump with adjustable working pressure. The multifunctional pump is used to adjust the working pressure of a working chamber, and comprises a pump body, a pressure sensor, a setting device, an indicating device, a control circuit board, a pressure output connection port and a housing; the pump body, the pressure output connection port and the pressure sensor are interconnected, and the pressure output connection port is sealed and connected to the working chamber; the pump body, the pressure sensor, the setting device and the indicating device are electrically connected to the control circuit board respectively, the pressure sensor is used to monitor the working pressure, the setting device is used to set the standard pressure, the control circuit board is used to change the working state of the pump body, and the indicating device is used to display at least one of the working state of the pump body, the working pressure and the standard pressure.

Description

Technical Field

[0001] The invention belongs to the technical field of pumps, and in particular relates to a multifunctional pump with adjustable working pressure. Background Art

[0002] The information disclosed in this background technology section is only intended to enhance the understanding of the overall background of the invention, and should not necessarily be regarded as an admission or any form of suggestion that the information constitutes the prior art already known to a person skilled in the art.

[0003] Small portable gas delivery pumps, including vacuum pumps and air pumps, have become popular in applications such as filling and deflation, food preservation, item storage, and sealing testing. Based on market demand and cost requirements, this type of product is divided into two grades: high-end products are equipped with a pressure switch linked to the pump to sense the vacuum degree or inflation pressure, and stop the pump when the vacuum degree or inflation pressure reaches a certain value; low-end products do not have a pressure switch, and the operator decides whether to stop the pump based on experience or manual estimation. Since low-end products do not have a pressure switch, their size can be made smaller, the structure is simpler, and the cost is lower, which has greater advantages in portability and low price; while high-end products, with their advantages such as accurate pressure control and worry-free operation, can provide better services in applications with higher process requirements.

[0004] In some complex applications, such as brewing and pickling corresponding to vacuum pumps, and mattress hardness adjustment corresponding to air pumps, it is necessary to accurately and automatically adjust the vacuum degree / pressure in the working chamber in stages and time periods. Obviously, low-end product technology is not competent for this application. High-end products can only respond to the pressure of a fixed gear due to the built-in single-gear pressure switch, and cannot be competent for multi-gear or arbitrary pressure regulation within a wide range. Although the external pressure display device of the working chamber can be used as feedback by manual visual inspection results, any product can be used to regulate the pressure of the working chamber, but this method requires consumers to prepare their own appropriate pressure display device, and consumers need to install it on the working chamber in a sealed manner by themselves, which will obviously cause a lot of trouble to consumers and a poor user experience.

[0005] In some other applications, the above traditional technology products are also not competent, such as:

[0006] A constant vacuum degree is required in brewing barrels or opened wine bottles to ensure brewing process or preservation. During the brewing process or preservation process, the pressure in the container will change with time or external temperature and other conditions, and the pressure in the container needs to be corrected in real time.

[0007] The working chamber is provided with two fluid ports (fluid port A and fluid port B) for inlet and outlet. During operation, fluid flows randomly through fluid port A. The flow rate of fluid port A needs to be tracked in real time by the operation of the pump connected to fluid port B to ensure that the pressure in the working chamber is constant.

[0008] Batch pressure operation (e.g., vacuuming a vacuum-packaged item on an assembly line), and the pressure requirement needs to be changed according to the operation object (e.g., the same pump needs to be used to operate products with different pressure requirements). Summary of the invention

[0009] In order to solve the deficiencies of the prior art, the present invention provides a multifunctional pump with adjustable working pressure.

[0010] In order to achieve the above object, the present invention is implemented through the following technical solutions:

[0011] In a first aspect, the present invention provides a multifunctional pump with adjustable working pressure, which is used to adjust the working pressure of a working chamber, and includes a pump body, a pressure sensor, a setting device, an indicating device, a control circuit board, a pressure output connection port and a housing;

[0012] The pump body, the pressure output connection port and the pressure sensor are interconnected, and the pressure output connection port is sealed and connected to the working chamber;

[0013] The pump body, the pressure sensor, the setting device and the indicating device are electrically connected to the control circuit board respectively. The pressure sensor is used to monitor the working pressure of the working chamber. The setting device is used to set the standard pressure of the working chamber and select the working mode of the multi-function pump. The control circuit board is used to change the working state of the pump body according to the relationship between the working pressure and the standard pressure. The indicating device is used to display at least one of the working state of the pump body, the working pressure and the standard pressure. The working mode includes at least one of a set pressure single working mode, a multi-stage pressure timing single working mode, a multi-stage pressure timing repeated working mode and a set pressure tracking mode.

[0014] Optionally, the setting device includes a potentiometer and / or a switch, the potentiometer and the switch are independently or integratedly arranged, and the switch includes at least one of a push button switch, a coding switch, a dial switch and a gear switch.

[0015] When the setting device is a potentiometer, the contact position and the divided resistance value are changed by adjusting the angle of the potentiometer. According to the relationship between the divided resistance value preset in the control circuit board and the standard pressure and the working mode, the standard pressure and the working mode can be set. When the setting device is a switch, the switch can be used as a setting gear selection key and a switch key. Through different switching actions, such as pressing the key switch for different times, different circuit signals are transmitted to the control circuit board to set the standard pressure of the working chamber, the working mode of the multi-function pump, and change the working state of the pump body. When the potentiometer and the switch are set independently, the potentiometer sets the standard pressure of the working chamber and the working mode of the multi-function pump, and the switch changes the working state of the pump body. When the potentiometer and the switch are set as an integrated setting, the button can be operated when the rotating shaft is pressed along the axial direction of the potentiometer rotating shaft, and the angle of the potentiometer can be changed when the rotating shaft is rotated, that is, the contact position and the divided resistance value are changed.

[0016] Further optionally, the setting device also includes an adjusting device connected to the potentiometer, the adjusting device is used to adjust the angle of the potentiometer, and the adjusting device is arranged outside the shell or inside the shell and exposed through the operation window.

[0017] Further optionally, the adjustment device includes a knob operating handle or an operating disk, wherein the knob operating handle is arranged outside the housing, and the operating disk is arranged inside the housing and exposed through an operating window. The angle of the potentiometer can be adjusted by directly rotating the knob operating handle outside the housing, or the potentiometer can be adjusted by turning the operating disk exposed through the operating window.

[0018] Optionally, the display device includes an indicator light or a display, and the display device is arranged outside the shell or inside the shell and exposed through a display window.

[0019] The indicator light is a multi-level gear indicator light composed of multiple LEDs or multiple DOTs on an LCD screen. According to the preset pressure gear relationship, the working status, working pressure and standard pressure are indirectly displayed through the gear. When it is necessary to display the specific working status and the specific values ​​of the working pressure and standard pressure, the display is used for direct display.

[0020] Optionally, the pump body includes a driving device and a fluid pump, the driving device is electrically connected to the control circuit board, the driving device includes a motor, and the fluid pump is provided with a plurality of fluid inlet and outlet nozzles;

[0021] The pressure output connection port is provided with an external connection port, a first fluid channel, a second fluid channel port and a sensor connection nozzle, the first fluid channel is provided with a first fluid channel port and a first fluid external channel port which are interconnected, and the external connection port is interconnected with the second fluid channel port and the sensor connection nozzle;

[0022] The first fluid channel port and the second fluid channel port are respectively communicated with the fluid inlet and outlet nozzles, and the sensor pair nozzle is communicated with the pressure sensor.

[0023] Optionally, it further comprises a fluid flow direction switching device, which is arranged at the pressure output connection port and is used to switch the fluid flow direction;

[0024] The fluid pump is provided with a plurality of fluid inlet and outlet nozzles, and the pressure output connection port is provided with an external connection port, a first fluid channel port, a first fluid external channel port, a second fluid channel port and a sensor connection nozzle;

[0025] The first fluid channel port and the second fluid channel port are connected to the fluid inlet and outlet nozzles respectively, the sensor docking nozzle is connected to the pressure sensor, and the fluid flow direction switching device is connected to the first fluid channel port, the second fluid channel port, the first fluid external channel port and the external docking port.

[0026] Further optionally, the fluid flow direction switching device is set with two gears: in the first gear, the first fluid channel port is connected with the first fluid external channel port, and the second fluid channel port is connected with the external connection port; in the second gear, the first fluid channel port is connected with the external connection port, and the second fluid channel port is connected with the first fluid external channel port.

[0027] Optionally, the control circuit board includes a pressure monitoring module, a pressure setting module, an analysis and control module and a signal output module;

[0028] The pressure monitoring module is used to obtain the working pressure monitored by the pressure sensor and convert it into a working pressure signal;

[0029] The pressure setting module is used to obtain or obtain and store the standard pressure set by the setting device and convert it into a standard pressure signal;

[0030] The analysis and control module is used to receive the working pressure signal and the standard pressure signal, make judgments according to preset rules and generate control signals to change the working state of the pump body;

[0031] The signal output module is used to convert at least one of the information of the working state, working pressure and standard pressure of the pump body into a signal format that can be recognized by the indicating device.

[0032] Further optionally, the preset rules include: when the working pressure is higher than the standard pressure, reducing the working power of the pump body until the pump body is closed; when the working pressure is lower than the standard pressure, opening the pump body or increasing the working power of the pump body.

[0033] Optionally, the setting device is used to select a working mode of the multi-function pump, and the working modes include a set pressure single working mode, a multi-stage pressure timing single working mode, a multi-stage pressure timing repeated working mode, and a set pressure tracking mode.

[0034] Optionally, it further comprises an external power docking port and / or a secondary battery, the external power docking port is provided with a detachable sealing nozzle, and the control circuit board is provided with a battery management circuit and a status indicator light electrically connected to the secondary battery.

[0035] Optionally, the housing is provided with an external interface for connecting an external sensor, and the external sensor comprises at least one of a temperature sensor, a humidity sensor and a biosensor.

[0036] The beneficial effects achieved by one or more technical solutions of the present invention are as follows:

[0037] The multifunctional pump can monitor and adjust the working pressure of the working chamber in real time, and can set multi-level and adjustable standard pressures. It has variable termination conditions and can be applied to working chambers with different pressure requirements.

[0038] The standard pressure and working state are set by the setting device so that the multifunctional pump meets the needs of the working chamber. The working state, working pressure and standard pressure are reflected by the display device, and the state of the multifunctional pump and the working chamber is reflected. The setting device and the display device can adopt different settings according to specific needs to ensure that the working pressure is stable and constant, thereby improving the working flexibility and stability of the multifunctional pump.

[0039] The multi-function pump is further provided with a fluid flow direction switching device to realize the functional integration of the air pump and the vacuum pump, which enriches the use scenarios of the multi-function pump and improves the use value of the multi-function pump. BRIEF DESCRIPTION OF THE DRAWINGS

[0040] The accompanying drawings in the specification, which constitute a part of the present invention, are used to provide a further understanding of the present invention. The exemplary embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute improper limitations on the present invention.

[0041] Figure 1 This is a schematic diagram of the external structure of the multifunctional pump in Example 1;

[0042] Figure 2 Schematic diagram of the internal structure of the multifunctional pump in Example 1;

[0043] Figure 3 Schematic diagram of the fluid flow direction switching device of the multifunctional pump in Example 2;

[0044] Figure 4 It is a schematic diagram of the internal flow path of the fluid flow direction switching device of the multifunctional pump in Example 2;

[0045] Figure 5 This is a schematic diagram of the external structure of the multifunctional pump in Example 3;

[0046] Figure 6 This is a schematic diagram of the external structure of the multifunctional pump in Example 4;

[0047] Figure 7 This is a schematic diagram of the external structure of the multifunctional pump in Example 5;

[0048] Figure 8 This is a schematic diagram of the external structure of the multifunctional pump in Example 6;

[0049] In the figure, 1 is a housing, 2 is a pump body, 3 is a setting device, 4 is an indicating device, 5 is a control circuit board, 6 is a pressure output connection port, 7 is a fluid flow direction switching device, 11 is a top surface, 12 is an operation window, 13 is a display window, 14 is a knob hole, 15 is an assembly edge, 21 is a motor, 22 is a fluid pump, 23 is a fluid inlet and outlet nozzle, 31 is a potentiometer, 32 is a switch, 33 is a knob operating handle, 34 is an operating panel, 41 is an indicator light, 42 is a display screen, 51 is a circuit board substrate, 61 is an external connection port, 62 is a first fluid channel, and 63 is a second fluid Channel opening, 64 is the sensor docking nozzle, 65 is the first fluid channel opening, 66 is the first fluid external channel opening, 67 is the fixed edge, 68 is the gear mark, 71 is the first port, 72 is the second port, 73 is the third port, 74 is the fourth port, 75 is the anti-slip groove, 76 is the rotation indication mark, 311 is the knob, 321 is the push button switch, 322 is the dial switch, 331 is the buckle edge, 332 is the transparent window, 333 is the positioning convex, 334 is the rib, 335 is the upper panel, 336 is the positioning concave, 337 is the gear pointer, and 338 is the gear identification symbol. DETAILED DESCRIPTION

[0050] In order to enable those skilled in the art to more clearly understand the technical solution of the present invention, the technical solution of the present invention will be described in detail below in combination with specific embodiments and comparative examples.

[0051] Example 1

[0052] A multifunctional pump with adjustable working pressure comprises a pump body 2, a pressure sensor, a setting device 3, an indicating device 4, a control circuit board 5, a pressure output connection port 6 and a housing 1.

[0053] like Figure 1 As shown, a display window 13 is provided on the top surface 11 of the housing 1, an operation window 12 and a switch 32 are provided on the side wall, and an operation panel 34 is exposed through the operation window 12 and protrudes out of the housing 1, so as to rotate and drive the potentiometer 31 to change when setting the pressure.

[0054] like Figure 2 As shown, the interior of the multifunctional pump is composed of a pump body 2, a control circuit board 5, a pressure output connection port 6 and a secondary battery (not shown). The control circuit board 5 is printed on a circuit board substrate 51 as a basis, and a pressure sensor (not shown), a potentiometer 31 and an indicator light 41 are welded on the circuit board substrate 51. The operating panel 34 is fixed on the rotating rod of the potentiometer 31. The indicator light 41 is opposite to the display window 13, so that its luminous state is visible to the outside.

[0055] The pump body 2 includes a motor 21 and a fluid pump 22. The fluid pump 22 is provided with two fluid inlets and outlets (only one is drawn due to the angle) for fluid to flow out and flow in respectively.

[0056] The pressure output connection port 6 is a port for connecting the pump body 2 with the working chamber, and includes a fixed edge 67, an external connection port 61, a first fluid channel 62, a second fluid channel port 63, and a sensor connection nozzle 64. The first fluid channel 62 is also provided with a first fluid channel port 65 and a first fluid external channel port 66 that are interconnected; the external connection port 61 is connected to the second fluid channel port 63 and the sensor connection nozzle 64.

[0057] During assembly, the motor 21 of the pump body 2 is electrically connected to the control circuit board 5, the two fluid inlet and outlet nozzles 23 on the fluid pump 22 are sealed and docked with the first fluid channel port 65 and the second fluid channel port 63 on the pressure output connection port 6, respectively, and the pressure sensor is connected to the sensing connection nozzle 64 through a pipeline (not shown). After assembly, one of the two fluid inlet and outlet nozzles 23 on the fluid pump 22 is connected to the first fluid external channel port 66, and the other is connected to the external connection port 61 and the sensing connection nozzle 64, so that the pressure sensor is connected to the sensing connection nozzle 64, and the pressure (i.e., working pressure) of the external connection port 61 can be detected through the sensing connection nozzle 64.

[0058] When in use, first short press the switch 32 to switch the potentiometer 31 between setting the working pressure and setting the working mode. At this time, the setting mode of the potentiometer 31 is determined according to the gear displayed by the indicator light 41. Long press the switch 32 to confirm the setting mode, adjust the contact position and the resistance value of the potentiometer 31 by rotating the operating dial 34, adjust to the desired gear according to the indicator light 41, and then long press the switch 32 to confirm and end the setting.

[0059] Example 2

[0060] In this embodiment, the arrangement other than the pressure output connection port 6 of the multi-function pump is the same as that of the embodiment 1. Figure 3As shown, the pressure output connection port 6 is provided with an external connection port 61, a first fluid channel port 65, a first fluid external channel port 66, a second fluid channel port 63 and a sensor connection port 64, and the pressure sensor is connected to the sensor connection port 64. A fluid flow direction switching device 7 is provided on the pressure output connection port 6. The fluid flow direction switching device 7 is provided between the external connection port 61 and the fixed edge 67. It is a rotary switching valve and is connected to the first fluid channel port 65, the second fluid channel port 63, the first fluid external channel port 66 and the external connection port 61. The fluid flow direction switching device 7 is also provided with an anti-skid groove 75 and a rotation position indication mark 76. Correspondingly, a gear position mark 68 is provided on the fixed edge 67. The anti-skid groove 75 is used to increase the friction of the fluid flow direction switching device 7 to facilitate the rotation operation; the rotation position indication mark 76 and the gear position mark 68 are used to indicate the current gear position and whether it is rotated in place.

[0061] like Figure 4 As shown, the first port 71, the second port 72, the third port 73 and the fourth port 74 are arranged inside the fluid flow switching device 7, the first port 71 is connected to the third port 73, and the second port 72 is connected to the fourth port 74. During assembly, the fluid inlet and outlet nozzle 23 of the pump body 2 for fluid input is connected to the first fluid channel port 65, and the fluid inlet and outlet nozzle 23 of the pump body 2 for fluid output is connected to the second fluid channel port 63. When the fluid flow switching device 7 rotates to the first gear, the second fluid channel port 63 docks with the first port 71 and is connected to the external connection port 61 docked with the third port 73; at the same time, the first fluid channel port 65 docks with the second port 72 and is connected to the first fluid external channel port 66 docked with the fourth port 74. At this time, the pump body 2 outputs fluid to the external connection port 61, that is, a positive pressure is applied to the working chamber docked with the external connection port 61. When the fluid flow direction switching device 7 rotates to the second gear, the first fluid channel port 65 is connected to the external connection port 61, and the second fluid channel port 63 is connected to the first fluid external channel port 66. At this time, the pump body 2 draws fluid from the external connection port 61, that is, negative pressure is applied to the working object connected to the external connection port 61.

[0062] In this embodiment, by providing a fluid flow direction switching device 7, the multifunctional pump can be used as both a filling pump and a vacuum pump, thus improving the use value of the multifunctional pump.

[0063] Example 3

[0064] The external structure of the multifunctional pump provided in this embodiment is as follows: Figure 5 The same internal components as those in the first embodiment are not described in detail. The top surface 11 of the housing 1 is provided with a display window 13, a knob hole 14 and an assembly edge 15. The housing 1 is provided with a pump body 2, a control circuit board 5 and a pressure output connection port 6. Figure 5The control circuit board 5 is welded with a pressure sensor, a potentiometer 31, and an indicator light 41, wherein the potentiometer 31 is a key switch potentiometer, that is, the potentiometer 31 has a built-in key switch, when the rotating shaft of the potentiometer 31 is pressed along the axial direction, the key can be operated, and when the rotating shaft is rotated, the contact position of the potentiometer can be changed (the resistance value can be changed). The knob 311 of the potentiometer 31 protrudes out of the knob hole 14 of the top surface 11 of the housing 1, and the indicator light 41 protrudes out of the housing 1 through the display window 13.

[0065] The knob operating handle 33 is a disc structure, and a mounting hole (not shown due to angle reasons) is provided in the central position thereof, which is tightly matched with the knob 311 of the potentiometer 31. The end face is provided with a buckle edge 331, a transparent window 332, and a positioning protrusion 333, and the edge is provided with a rib 334. After assembly, the lower edge of the knob operating handle 33 coincides with the assembly edge 15 of the housing 1 to ensure a perfect appearance.

[0066] The upper panel 335 covers the knob operating handle 33 and is provided with a positioning recess 336. It is positioned by the positioning recess 336 and the positioning protrusion 333 on the knob operating handle 33, and is tightly snapped into the buckle edge 331 on the end face of the knob operating handle 33, and is used as a decorative and display panel. Corresponding to the corresponding area of ​​the indicator light 41 below it covers, the upper panel 335 is translucent to allow the light of the indicator light 41 to appear through the transparent window 332 and the upper panel 335.

[0067] The built-in button of the potentiometer 31 is also used for "calling the setting function" and "starting / stopping the pump". In this embodiment, in the standby state, a short press of the upper panel 335 once can be linked to pressing the built-in button of the potentiometer 32 to start the multi-function pump. In the multi-function pump working state, a short press of the upper panel 335 again can stop the pump; long press of the upper panel 335 for 2 seconds can call the setting function (enter the setting state). At this time, the control circuit board 5 detects the angle of the potentiometer 31 in real time, and calculates the gear corresponding to the setting value according to the angle, and lights up the corresponding number of indicator lights 41 to indicate the current setting value. In the setting state, long press of the upper panel 335 for 2 seconds, the control circuit board 5 memorizes the current position of the potentiometer 31 (corresponding to the setting value) and exits the setting state.

[0068] During operation, the control circuit board 5 drives the pump body 2 to work, outputs pressure to the outside through the pressure output connector 6, and detects the pressure value (working pressure value) at the pressure output connector 6 in real time through the pressure sensor, and displays the pressure level on the indicator light 41. When the working pressure value reaches the set pressure value, the control circuit board 5 stops driving the pump body 2, and the pump body 2 stops continuing to output pressure to the outside through the pressure output connector 6.

[0069] The configuration of this embodiment has the following effects:

[0070] The multifunctional pump has variable end working conditions, making it suitable for applications with various pressure requirements;

[0071] It can intuitively display the set value and the pressure changes during the working process, making the working process transparent and improving the experience. At the same time, it provides a visual basis for judging the possible faults of the multi-function pump (for example, when a fluid circuit leaks, the working pressure value may remain unchanged or change slowly for a long time during operation, and the fault point can be determined in turn);

[0072] The integrated design of buttons and potentiometers can greatly simplify the structure;

[0073] The setting state and working state are carried out in time periods by the control circuit board according to the operation of the key switch. When the setting state is not entered, any operation on the potentiometer will not affect the change of the set value. In other words, the change of the set value caused by the wrong operation of the potentiometer can be greatly reduced, and the abnormal change of the set value can be prevented. This can ensure the consistency of the working pressure of each pressure operation in applications with strict requirements on pressure technology, especially in applications where the pump is used for pressure operation for multiple times in a row.

[0074] Example 4

[0075] This embodiment is modified on the basis of the embodiment 3, the control circuit board 5 does not memorize the set value, and does not have a working state selection function. Figure 6 As shown, the same parts as those in Example 3 are not repeated here. The knob operating handle 33 is provided with a gear pointer 337 ; correspondingly, the housing 1 is provided with a gear identification symbol 338 .

[0076] When the knob operating handle 33 is rotated, the gear position identification symbol 338 of the housing 1 pointed to by the gear position pointer 337 can display the current angle (corresponding to the set value) of the potentiometer 32 (not shown).

[0077] When setting the pressure value, it is not necessary to press and hold the upper panel 335 (not shown) for 2 seconds to enter the setting state, that is, the control circuit board 5 (not shown) does not functionally set the working state rotation, nor does it memorize the set value. Correspondingly, the set value is not displayed by the indicator light 41, that is, the indicator light 41 is only used to display the working pressure during operation.

[0078] When working, pressing the upper panel (linked with pressing the button switch built in the potentiometer 32) can start working, and pressing it again during working can stop working.

[0079] This embodiment can simplify the operation, and there is no need to enter the setting state to set the pressure. The set value can also be changed at any time as needed during the working process, which has high flexibility.

[0080] Example 5

[0081] Multifunctional pumps with adjustable working pressure, such as Figure 7 As shown, it includes a pump body 2 (arranged inside the shell, not drawn), a pressure sensor (arranged inside the shell, not drawn), a setting device 3, an indicating device 4, a control circuit board 5 (arranged inside the shell, not drawn), a pressure output connection port 6 and a shell 1. The side of the shell 1 is provided with an external power connection port (located in itself, not drawn due to angle reasons). The setting device 3 includes a key switch 321 arranged on the top surface 11 of the shell 1 and two dial switches 322 arranged on the side of the shell 1 (only one is drawn due to the angle). The indicating device 4 is a display screen 42 arranged on the top surface 11 of the shell 1.

[0082] The rotary switch 322 is a three-contact rotary switch. Figure 7 Direction, when the dial switch 322 is pushed upward, the first contact inside the dial switch 322 is connected; when the dial switch 322 is pushed downward, the second contact inside the dial switch 322 is connected; when the dial switch 322 is pushed radially inwardly along the housing 1, the third contact inside the dial switch 322 is connected. The dial switch 322 can be used to set the working pressure value and set the timing, as well as set the working mode of the multi-function pump (for example, set pressure single working mode, multi-stage pressure timing single working mode, multi-stage pressure timing repeated working mode, set pressure tracking mode). Take the setting pressure value as an example: when the dial switch 322 is pushed inward, the pressure setting state is entered, and the display screen 42 displays the current setting gear. At this time, if the dial switch 322 is pushed upward once, the pressure setting value increases by one resolution value, and if the dial switch 322 is pushed downward once, the pressure setting value decreases by one resolution value, and the corresponding value on the display screen changes accordingly; when the dial switch 322 is pushed inward again, the setting value is saved and the pressure setting state is exited.

[0083] This embodiment sets a plurality of settable working parameters for the pump, enriches the functions of the pump, makes the pump widely applicable to a larger number of application scenarios, and provides users with more options for automated application functions. Multiple setting devices 3 (dial switches 322) and multiple indicating devices 4 (display screens 42) are used to set corresponding parameters, simplifying the operation.

[0084] Example 6

[0085] like Figure 8As shown, different from Example 5, the setting device 3 is a key switch 321 arranged on the top surface 11 of the housing 1. The key switch 321 is used as both a setting gear selection key and a switch key, that is, the key is multiplexed. For example, after long pressing the key for 2 seconds, the setting function is entered, and the corresponding display screen 41 is displayed accordingly. Then, each time the key is pressed, the setting gear can be switched between the setting gears, and the corresponding display screen 41 is displayed accordingly. After selecting the desired gear, long press the key for 2 seconds again to exit the function and enter the standby state. Pressing the key once in the standby state can start the pump, and pressing the key again can stop the work. This embodiment can simplify the hardware, reduce the cost, and reduce the volume.

[0086] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. For those skilled in the art, the present invention may have various modifications and variations. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. A multifunctional pump with adjustable working pressure, characterized in that: Used to adjust the working pressure of the working chamber, including a pump body, a pressure sensor, a setting device, an indicating device, a control circuit board, a pressure output connection port and a housing; The pump body, the pressure output connection port and the pressure sensor are interconnected, and the pressure output connection port is sealed and connected to the working chamber; The pump body, the pressure sensor, the setting device and the indicating device are electrically connected to the control circuit board respectively. The pressure sensor is used to monitor the working pressure of the working chamber. The setting device is used to set the standard pressure of the working chamber and the working mode of the multi-function pump. The control circuit board is used to change the working state of the pump body according to the relationship between the working pressure and the standard pressure. The indicating device is used to display at least one of the working state of the pump body, the working pressure and the standard pressure. The working mode includes at least one of a set pressure single working mode, a multi-stage pressure timing single working mode, a multi-stage pressure timing repeated working mode and a set pressure tracking mode.

2. The multifunctional pump according to claim 1, characterized in that: The setting device includes a potentiometer and / or a switch, the potentiometer and the switch are independently or integratedly arranged, and the switch includes at least one of a key switch, a coding switch, a dial switch and a gear switch.

3. The multifunctional pump according to claim 2, characterized in that: The setting device also includes an adjusting device connected to the potentiometer, the adjusting device is used to adjust the angle of the potentiometer, and the adjusting device is arranged outside the shell or inside the shell and exposed through the operation window.

4. The multifunctional pump according to claim 1, characterized in that: The display device comprises an indicator light or a display, and the display device is arranged outside the housing or inside the housing and exposed through a display window.

5. The multifunctional pump according to claim 1, characterized in that: The pump body comprises a driving device and a fluid pump, wherein the driving device is electrically connected to the control circuit board, the driving device comprises a motor, and the fluid pump is provided with a plurality of fluid inlet and outlet nozzles; The pressure output connection port is provided with an external connection port, a first fluid channel, a second fluid channel port and a sensor connection nozzle, the first fluid channel is provided with a first fluid channel port and a first fluid external channel port which are interconnected, and the external connection port is interconnected with the second fluid channel port and the sensor connection nozzle; The first fluid channel port and the second fluid channel port are respectively communicated with the fluid inlet and outlet nozzles, and the sensor pair nozzle is communicated with the pressure sensor.

6. The multifunctional pump according to claim 1, characterized in that: It also includes a fluid flow direction switching device, which is arranged at the pressure output connection port and is used to switch the fluid flow direction; The fluid pump is provided with a plurality of fluid inlet and outlet nozzles, and the pressure output connection port is provided with an external connection port, a first fluid channel port, a first fluid external channel port, a second fluid channel port and a sensor connection nozzle; The first fluid channel port and the second fluid channel port are connected to the fluid inlet and outlet nozzles respectively, the sensor docking nozzle is connected to the pressure sensor, and the fluid flow direction switching device is connected to the first fluid channel port, the second fluid channel port, the first fluid external channel port and the external docking port.

7. The multifunctional pump according to claim 6, characterized in that: The fluid flow direction switching device is set with two gears: in the first gear, the first fluid channel port is connected with the first fluid external channel port, and the second fluid channel port is connected with the external connection port; in the second gear, the first fluid channel port is connected with the external connection port, and the second fluid channel port is connected with the first fluid external channel port.

8. The multifunctional pump according to claim 1, characterized in that: The control circuit board includes a pressure monitoring module, a pressure setting module, an analysis and control module and a signal output module; The pressure monitoring module is used to obtain the working pressure monitored by the pressure sensor and convert it into a working pressure signal; The pressure setting module is used to obtain or obtain and store the standard pressure set by the setting device and convert it into a standard pressure signal; The analysis and control module is used to receive the working pressure signal and the standard pressure signal, make judgments according to preset rules and generate control signals to change the working state of the pump body; The signal output module is used to convert at least one of the information of the working state, working pressure and standard pressure of the pump body into a signal format that can be recognized by the indicating device.

9. The multifunctional pump according to claim 8, characterized in that: The preset rules include: when the working pressure is higher than the standard pressure, the working power of the pump body is reduced until the pump body is closed; when the working pressure is lower than the standard pressure, the pump body is opened or the working power of the pump body is increased.

10. The multifunctional pump according to claim 1, characterized in that: It also includes an external power docking port and / or a secondary battery. The external power docking port is provided with a detachable sealing nozzle. The control circuit board is provided with a battery management circuit and a status indicator light electrically connected to the secondary battery.

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