Inflator

Abstract

The utility model relates to an inflator. The inflator comprises an air pump, a control circuit board, an air pressure sensor, an air inlet passage and an air outlet passage, wherein the air pressure sensor is electrically connected with the control circuit board; the air pump is electrically connected with the control circuit board; one end of the air inlet passage is communicated with the air pump, and the other end of the air inlet passage is used for inflating; one end of the air release passage is communicated with the air inlet passage, and the other end of the air release passage is arranged to be hollow and can be opened or closed under the control of the control circuit board; wherein the inflator has a first state and a second state; the air pressure sensor can detect the air pressure of the air inlet passage; in the first state, the air pressure sensor detects that the air pressure of the air inlet channel is lower than a preset air pressure value, the control circuit board controls the air release channel to be closed, and the air pump is opened for inflation; in the second state, the air pressure sensor detects that the air pressure of the air inlet channel is higher than the preset air pressure value, and the control circuit board controls the air leakage channel to open for air leakage.

Description

Technical Field

[0001] The utility model relates to the technical field of inflation equipment, in particular to an inflator. Background Art

[0002] At present, small inflatable products such as portable intelligent air pumps are widely used to charge inflatable products such as cars, bicycles, balls, and air cushions. For various products that need to be inflated, they have a rated air pressure. Therefore, when the inflation pressure is greater than the rated air pressure, in order to prevent it from being damaged during use and bringing immeasurable consequences, for example, if the tire pressure of a car is too high, there is a risk of a blowout; it is generally deflated. At present, there is no tool specifically for deflation of such products. When deflation, users often use some auxiliary tools to deflate the inflatable products. Because it is difficult to obtain the real-time air pressure of the inflatable products, the deflation process is also based on the user's experience. If the deflation is too much, the inflatable product needs to be re-inflated, which is very inconvenient to use. For example, the traditional tire inflation work generally uses an air pump or air cylinder that is directly connected to the tire valve. The inflation pressure needs to be determined based on the operating experience of the maintenance personnel. In order to reach the rated pressure of the tire, it often requires multiple inflation and measurement processes. Therefore, the traditional method of inflating tires has many disadvantages. It requires repeated measurement of the air pressure in the inner cavity and multiple inflation operations, which is not only inconvenient to operate, but also has poor inflation effect. Utility Model Content

[0003] Based on this, it is necessary to provide an inflator to address the above problems.

[0004] An inflator comprising:

[0005] air pump;

[0006] Control circuit board;

[0007] An air pressure sensor electrically connected to the control circuit board;

[0008] An air intake passage, one end of which is connected to the air pump and the other end of which is used for inflation;

[0009] An air leakage passage, one end of which is connected to the air intake passage, and the other end of which is arranged to be open or closed under the control of the control circuit board;

[0010] Wherein, the inflator has a first state and a second state; the air pressure sensor is capable of detecting the air pressure of the intake passage; in the first state, the air pressure sensor detects that the air pressure of the intake passage is lower than a preset air pressure value, and the control circuit board controls the deflation passage to be closed and turns on the air pump to inflate; in the second state, the air pressure sensor detects that the air pressure of the intake passage is higher than the preset air pressure value, and the control circuit board controls the deflation passage to be opened to deflate.

[0011] The above-mentioned inflator can at least achieve the following beneficial effects: the inflator can be used to inflate various inflatable objects such as tires, air cushions, balloons, etc. During inflation, the end of the air inlet passage used for inflation can be connected to the inner cavity of the inflated object, and the air pressure value of the inner cavity of the inflated object is the same as the air pressure value of the air inlet passage. The air pressure sensor can know the air pressure of the inner cavity of the inflated object by detecting the air pressure of the air inlet passage. When the air pressure sensor detects that the air pressure of the air inlet passage is lower than the preset air pressure value, the data can be fed back to the control circuit board. The control circuit board can control the deflation passage to be in a closed state and control the air pump to start at the same time. At this time, the inflator is in the first state to achieve inflation. When the air pressure sensor detects that the air pressure value of the air inlet passage is higher than the preset air pressure value, it means that the air pressure of the inner cavity of the inflated object is higher than the preset air pressure value. At this time, the control circuit board can control the deflation passage to open according to the data fed back by the air pressure sensor. At this time, the inflator is in the second state to achieve deflation. The inflator can switch between the first state and the second state until the air pressure in the inner cavity of the inflated article reaches the preset air pressure value.

[0012] In one embodiment, the air release passage includes a solenoid valve and an air release pipe, one end of the air release pipe is connected to the air intake passage, and the other end of the air release pipe is connected to the solenoid valve, the solenoid valve is provided with a pressure relief port, the solenoid valve is electrically connected to the control circuit board and can open or close the pressure relief port under the control of the control circuit board. When the air pressure in the inner cavity of the inflated article is higher than the preset air pressure value, that is, when the air pressure sensor detects that the air pressure value in the air intake passage is higher than the preset air pressure value, the solenoid valve can open the pressure relief port. Since the air pressure in the air intake passage is higher than the external atmospheric pressure, the gas in it can be discharged through the air release pipe through the pressure relief port of the solenoid valve to reduce the air pressure in the inner cavity of the inflated article until it reaches the preset air pressure value. For example, when the inflated object is a car tire, the air pressure of the car tire is usually higher. For ordinary passenger cars, the inflation pressure of the tire is generally between about 220-250 kPa; and the atmospheric pressure (atmospheric pressure usually refers to the atmospheric pressure at sea level) is usually about 101.3 kPa, which is much smaller than the internal pressure of the tire. When the inflation pipe and the air intake pipe inflate the tire, the pressure inside the air intake pipe and the inflation pipe is naturally higher than the external atmospheric pressure. Therefore, when the pressure relief port of the solenoid valve is opened, the gas inside will leak out.

[0013] In one embodiment, the air intake passage includes a multi-way joint, an air filling pipe and an air intake pipe, one end of the air intake pipe is connected to the air pump, the other end of the air intake pipe is connected to the first end of the multi-way joint, the second end of the multi-way joint is connected to one end of the air filling pipe, and the other end of the air filling pipe is used for inflation. When the air pump is started, air can be supplied to the air filling pipe through the air intake pipe and the multi-way joint, and the inflated object can be inflated through the air filling pipe.

[0014] In one embodiment, the inflator further includes a detection tube, one end of which is connected to the third end of the multi-way connector, and the other end of which is connected to the air pressure sensor, and the air pressure sensor can detect the air pressure through the detection tube. The air pressure sensor can detect the air pressure value of the air intake passage through the air release pipe, that is, detect the air pressure in the inner cavity of the inflated article.

[0015] In one embodiment, the air leakage passage includes a solenoid valve and a air leakage pipe, one end of the air leakage pipe is connected to the fourth end of the multi-way connector, and the other end of the air leakage pipe is connected to the solenoid valve, and the solenoid valve is provided with a pressure relief port. The solenoid valve is electrically connected to the control circuit board and can open or close the pressure relief port under the control of the control circuit board.

[0016] In one embodiment, the multi-way connector is a four-way connector, and the air inlet pipe, the air charging pipe, the detection pipe and the air release pipe are connected through the four-way connector.

[0017] In one embodiment, the inflator further comprises a housing, the control circuit board, the air pressure sensor, the deflation passage and the air intake passage are all arranged in the housing, the housing is provided with a through hole, and one end of the inflation tube for inflation can extend from the through hole. After the end of the inflation tube for inflation extends from the through hole, it can be connected with the inner cavity of the inflated object.

[0018] In one embodiment, the inflator further comprises a control screen, the control screen is arranged on the outer surface of the housing, the control screen is electrically connected to the control circuit board, and the control screen can be used to change the preset air pressure value. The user can change the preset air pressure value through the control circuit board.

[0019] In one embodiment, the inflator has multiple working modes, and the preset air pressure value of each working mode is different. The control screen can be used for the user to operate to switch the inflator between the multiple working modes; the inflator also includes a gas nozzle, the number of which is set to multiple, and each working mode corresponds to at least one gas nozzle, and the gas nozzle at one end of the inflation tube used for inflation is detachably connected. When in use, the user can choose to connect the gas nozzle to one end of the inflation tube. When used, the user can choose to unplug the gas nozzle from the inflation tube and put it into the storage box. In other words, the gas nozzle can be carried with the entire shell to prevent the gas nozzle from being lost; when it is to be used, the user only needs to take the gas nozzle out of the storage box and connect it to the air inlet pipe for use, which is easy to operate. For example, the gas nozzle includes a first gas nozzle, a second gas nozzle, a third gas nozzle and a fourth gas nozzle, etc., and the working modes include a first working mode, a second working mode, a third working mode and a fourth working mode, etc. Among them, the first working mode has a first preset air pressure value, the first air nozzle can match the air inlet position on the basketball, and the basketball can be inflated through the first air nozzle; the second working mode has a second preset air pressure value, the second air nozzle can match the air inlet position on the car tire, and the car tire can be inflated through the second air nozzle; the third working mode has a third preset air pressure value, the third air nozzle can match the air inlet position on the bicycle tire, and the bicycle tire can be inflated through the third air nozzle; the fourth working mode has a fourth preset air pressure value, the fourth air nozzle can match the air inlet position on the air bed, and the air bed can be inflated through the fourth air nozzle; wherein the first preset air pressure value, the second preset air pressure value, the third preset air pressure value and the fourth preset air pressure value are all different. It should be noted that the above examples are only for illustrating various working modes, and do not indicate or imply that the working modes can only have the above four types, that is, theoretically, there can be multiple working modes, such as two, three, four, five or more.

[0020] In one embodiment, the inflator further comprises a lighting device, which is arranged on the housing and electrically connected to the control circuit board, and the light-emitting surface of the lighting device faces outward. It is understandable that when the environment around the inflator is relatively dim, it is difficult for the user to see clearly, and it is not convenient to connect the inflation tube with the inflated object. However, the lighting device is provided in this embodiment, and the light emitted by the light-emitting surface facing outward can illuminate the surrounding environment, providing the user with a cleaning working field, which is convenient for the user to operate.

[0021] In one embodiment, the housing includes a first housing and a second housing, and the first housing and the second housing are detachably connected and enclosed to form a receiving cavity. Such a structural setting means that the housing can be disassembled, and the early assembly is more convenient and efficient, and it is also convenient to disassemble in the later stage to repair and replace various parts in the housing.

[0022] In one embodiment, the inflator further includes a heat dissipation fan disposed in the housing. The heat dissipation fan can accelerate the flow of gas in the housing, so that the gas in the housing can be quickly circulated and exchanged with the outside atmosphere through the ventilation holes on the housing, thereby dissipating heat from various parts in the housing including heat-prone electronic components, which is conducive to maintaining the normal operation and service life of the inflator.

[0023] In one embodiment, the inflator further includes a storage box, which is disposed on an outer surface of the shell and is used to store at least one of the air nozzles.

[0024] In one embodiment, a storage slot is provided on the storage box, and a buckle is provided on the slot wall of the storage slot, and the buckle is used to snap on the gas nozzle to store the gas nozzle. When the user does not use the gas nozzle, the gas nozzle can be snapped and fixed to the buckle in the storage slot. When the user wants to use the gas nozzle, he can simply pull the gas nozzle out of the storage slot. Such a structural setting makes the user's operation more convenient. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] In order to more clearly illustrate the technical solutions in the embodiments of the present application or the conventional technology, the drawings required for use in the embodiments or the conventional technology descriptions are briefly introduced below. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.

[0026] Figure 1 A schematic diagram of the structure of an inflator provided by an embodiment of the utility model;

[0027] Figure 2 An exploded schematic diagram of an inflator provided by one embodiment of the utility model;

[0028] Figure 3 A schematic diagram of the internal structure of an inflator provided by an embodiment of the utility model;

[0029] Figure 4 Another structural schematic diagram of an inflator provided by an embodiment of the utility model;

[0030] Figure 5 A schematic diagram of the structure of a storage box and a gas nozzle provided by an embodiment of the utility model;

[0031] Figure 6 A partial internal structure diagram of an inflator provided in one embodiment of the utility model.

[0032] Reference numerals:

[0033] 10. Inflator; 100. Shell; 110. First shell; 120. Second shell; 130. Through hole; 200. Air pump; 300. Control circuit board; 310. Air pressure sensor; 320. Detection tube; 400. Air intake passage; 410. Air intake pipe; 420. Inflating pipe; 430. Multi-way connector; 500. Air discharge passage; 510. Solenoid valve; 520. Air discharge pipe; 600. Cooling fan; 700. Air nozzle; 800. Storage box; 810. Storage slot; 820. Buckle; 900. Control panel; 910. Lighting device. DETAILED DESCRIPTION

[0034] In order to make the above-mentioned purposes, features and advantages of the utility model more obvious and easy to understand, the specific implementation methods of the utility model are described in detail below in conjunction with the accompanying drawings. In the following description, many specific details are set forth to facilitate a full understanding of the utility model. However, the utility model can be implemented in many other ways different from those described herein, and those skilled in the art can make similar improvements without violating the connotation of the utility model, so the utility model is not limited by the specific embodiments disclosed below.

[0035] See also Figure 1 , Figure 2 , Figure 3 and Figure 4 In some embodiments, the present application provides an inflator 10, which includes an air pump 200, a control circuit board 300, an air pressure sensor 310, an air intake passage 400, and an air discharge passage 500. The air pressure sensor 310 is electrically connected to the control circuit board 300; the air pump 200 is electrically connected to the control circuit board 300; one end of the air intake passage 400 is connected to the air pump 200, and the other end of the air intake passage 400 is used for inflation; one end of the air discharge passage 500 is connected to the air intake passage 400, and the other end of the air discharge passage 500 is set to the air and can be opened or closed under the control of the control circuit board 300; the inflator 10 has a first state and a second state. state; the air pressure sensor 310 is capable of detecting the air pressure of the intake passage 400; in the first state, the air pressure sensor 310 detects that the air pressure of the intake passage 400 is lower than the preset air pressure value, the control circuit board 300 controls the air leakage passage 500 to be closed, and turns on the air pump 200 to inflate; in the second state, the air pressure sensor 310 detects that the air pressure of the intake passage 400 is higher than the preset air pressure value, and the control circuit board 300 controls the air leakage passage 500 to be opened to leak air.

[0036] The above-mentioned inflator 10 can at least achieve the following beneficial effects: the inflator 10 can be used to inflate various inflatable objects such as tires, air cushions, balloons, etc. During inflation, the end of the air inlet passage 400 used for inflation can be connected to the inner cavity of the inflated object, and the air pressure value of the inner cavity of the inflated object is the same as the air pressure value of the air inlet passage 400. The air pressure sensor 310 can know the air pressure of the inner cavity of the inflated object by detecting the air pressure of the air inlet passage 400. When the air pressure sensor 310 detects that the air pressure of the air inlet passage 400 is lower than the preset air pressure value, the data can be fed back to the control circuit board 300, and the control circuit board 300 can control the deflation passage 500 to be in a closed state, and at the same time control the air pump 200 to start. At this time, the inflator 10 is in the first state to achieve inflation. When the air pressure sensor 310 detects that the air pressure value of the air intake passage 400 is higher than the preset air pressure value, it means that the air pressure in the inner cavity of the inflated object is higher than the preset air pressure value. At this time, the control circuit board 300 can control the deflation passage 500 to open according to the data fed back by the air pressure sensor 310. At this time, the inflator 10 is in the second state to achieve deflation. The inflator 10 can switch between the first state and the second state until the air pressure in the inner cavity of the inflated object reaches the preset air pressure value.

[0037] Specifically, Figure 3 As shown, in some embodiments, the degassing passage 500 includes a solenoid valve 510 and a degassing pipe 520, one end of the degassing pipe 520 is in communication with the air inlet passage 400, and the other end of the degassing pipe 520 is in communication with the solenoid valve 510, and a pressure relief port is provided on the solenoid valve 510, and the solenoid valve 510 is electrically connected to the control circuit board 300 and can open or close the pressure relief port under the control of the control circuit board 300. When the air pressure in the inner cavity of the inflated article is higher than the preset air pressure value, that is, when the air pressure sensor 310 detects that the air pressure value of the air inlet passage 400 is higher than the preset air pressure value, the solenoid valve 510 can open the pressure relief port. Since the air pressure in the air inlet passage 400 is higher than the external atmospheric pressure, the gas therein can be discharged through the degassing pipe 520 and the pressure relief port of the solenoid valve 510, so as to reduce the air pressure in the inner cavity of the inflated article until it reaches the preset air pressure value. For example, when the inflated object is a car tire, the air pressure of the car tire is usually higher. For ordinary passenger cars, the inflation pressure of the tire is generally between about 220-250 kPa; and the atmospheric pressure (atmospheric pressure usually refers to the atmospheric pressure at sea level) is usually about 101.3 kPa, which is much smaller than the internal pressure of the tire. When the inflation pipe 420 and the intake pipe 410 inflate the tire, the pressure inside the intake pipe 410 and the inflation pipe 420 is naturally higher than the external atmospheric pressure. Therefore, when the pressure relief port of the solenoid valve 510 is opened, the gas inside will leak out.

[0038] Specifically, Figure 3As shown, in some embodiments, the air intake passage 400 includes a multi-way joint 430, an air charging tube 420 and an air intake tube 410, one end of the air intake tube 410 is connected to the air pump 200, the other end of the air intake tube 410 is connected to the first end of the multi-way joint 430, the second end of the multi-way joint 430 is connected to one end of the air charging tube 420, and the other end of the air charging tube 420 is used for inflating. When the air pump 200 is started, air can be supplied to the air charging tube 420 through the air intake tube 410 and the multi-way joint 430, and the inflated object can be inflated through the air charging tube 420.

[0039] More specifically, if Figure 3 As shown, in some embodiments, the inflator 10 further includes a detection tube 320, one end of which is connected to the third end of the multi-way connector 430, and the other end of which is connected to the air pressure sensor 310, and the air pressure sensor 310 can detect the air pressure through the detection tube 320. The air pressure sensor 310 can detect the air pressure value of the air intake passage 400 through the air release pipe 520, that is, detect the air pressure of the inner cavity of the inflated article.

[0040] More specifically, if Figure 3 As shown, in some embodiments, the air bleed passage 500 includes a solenoid valve 510 and a air bleed pipe 520, one end of the air bleed pipe 520 is connected to the fourth end of the multi-way connector 430, and the other end of the air bleed pipe 520 is connected to the solenoid valve 510, and a pressure relief port is provided on the solenoid valve 510, and the solenoid valve 510 is electrically connected to the control circuit board 300 and can open or close the pressure relief port under the control of the control circuit board 300.

[0041] More specifically, if Figure 3 As shown, in one embodiment, the multi-way connector is a four-way connector, and the air inlet pipe, the air charging pipe, the detection pipe and the air release pipe are connected through the four-way connector.

[0042] See also Figures 1 to 5 In some embodiments, the inflator 10 further includes a housing 100, the control circuit board 300, the air pressure sensor 310, the deflation passage 500 and the air intake passage 400 are all disposed in the housing 100, the housing 100 is provided with a through hole 130, and one end of the inflation tube 420 for inflation can extend from the through hole 130. After the end of the inflation tube 420 for inflation extends from the through hole 130, it can be communicated with the inner cavity of the inflated object.

[0043] Furthermore, if Figure 1As shown, in some embodiments, the inflator 10 further includes a control screen 900, which is disposed on the outer surface of the housing 100, and is electrically connected to the control circuit board 300, and the control screen 900 can be used to change the preset air pressure value. The user can change the preset air pressure value through the control circuit board 300.

[0044] Further, in some embodiments, the inflator 10 has multiple working modes, and the preset air pressure value of each working mode is different. The control screen 900 can be used for the user to operate so that the inflator 10 switches between the multiple working modes; the inflator 10 also includes a gas nozzle 700, the number of the gas nozzle 700 is set to multiple, each working mode corresponds to at least one gas nozzle 700, and the gas nozzle 700 is detachably connected to the end of the inflation tube 420 used for inflation. When in use, the user can choose to connect the gas nozzle 700 to one end of the inflation tube 420. When the use is finished, the user can choose to unplug the gas nozzle 700 from the inflation tube 420 and put it into the storage box 800. In other words, the gas nozzle 700 can be carried together with the entire housing 100 to prevent the gas nozzle 700 from being lost; when it is to be used, the user only needs to take the gas nozzle 700 out of the storage box 800 to connect it with the air inlet pipe 410 for use, which is easy to operate. For example, the gas nozzle 700 includes a first gas nozzle 700, a second gas nozzle 700, a third gas nozzle 700 and a fourth gas nozzle 700, etc., and the working mode includes a first working mode, a second working mode, a third working mode and a fourth working mode, etc. Wherein, the first working mode has a first preset air pressure value, the first air nozzle 700 can match the air inlet position on the basketball, and the basketball can be inflated through the first air nozzle 700; the second working mode has a second preset air pressure value, the second air nozzle 700 can match the air inlet position on the car tire, and the car tire can be inflated through the second air nozzle 700; the third working mode has a third preset air pressure value, the third air nozzle 700 can match the air inlet position on the bicycle tire, and the bicycle tire can be inflated through the third air nozzle 700; the fourth working mode has a fourth preset air pressure value, the fourth air nozzle 700 can match the air inlet position on the air bed, and the air bed can be inflated through the fourth air nozzle 700; wherein, the first preset air pressure value, the second preset air pressure value, the third preset air pressure value and the fourth preset air pressure value are all different. It should be noted that the above examples are only for illustrating various working modes, and do not indicate or imply that the working modes can only have the above four, that is, theoretically, the working modes can be multiple, such as two, three, four, five or more.

[0045] Furthermore, if Figure 2 , Figure 4 and Figure 5As shown, in some embodiments, the inflator 10 further includes an illuminating device 910, which is passed through and fixed to the housing 100 and electrically connected to the control circuit board 300, and the luminous surface of the illuminating device 910 faces outward. It can be understood that when the environment around the inflator 10 is relatively dim, it is difficult for the user to see clearly, and it is not convenient for the inflation tube 420 to dock with the inflated object. However, the illuminating device 910 is provided in this embodiment, and the light emitted by the luminous surface facing outward can illuminate the surrounding environment, providing the user with a cleaning working field, which is convenient for the user to operate.

[0046] Furthermore, if Figure 2 As shown, in some embodiments, the housing 100 includes a first housing 110 and a second housing 120, and the first housing 110 and the second housing 120 are detachably connected and enclosed to form a receiving cavity. Such a structural setting means that the housing 100 can be disassembled, and the early assembly is more convenient and efficient, and it is also convenient to disassemble in the later stage to repair and replace various parts in the housing 100.

[0047] Furthermore, if Figures 2 to 4 As shown, in some embodiments, the inflator 10 further includes a heat dissipation fan disposed in the housing 100. The heat dissipation fan can accelerate the flow of gas in the housing 100, so that the gas in the housing 100 can be quickly circulated and exchanged with the outside atmosphere through the ventilation holes on the housing, thereby dissipating heat from various components in the housing 100 including heat-prone electronic components, which is beneficial to maintaining the normal operation and service life of the inflator.

[0048] See also Figure 6 In some embodiments, the inflator 10 further includes an air nozzle 700 and a storage box 800. The storage box 800 is disposed on the outer surface of the housing 100. The storage box 800 is used to store the air nozzle 700. One end of the inflation tube 420 used for inflation is detachably connected to the air nozzle 700. When in use, the user can choose to connect the air nozzle 700 to one end of the inflation tube 420. When finished using, the user can choose to remove the air nozzle 700 from the inflation tube 420 and put it into the storage box 800. In other words, the air nozzle 700 can be carried along with the entire housing 100 to prevent the air nozzle 700 from being lost. When it is ready to be used, the user only needs to take the air nozzle 700 out of the storage box 800 to connect it to the air inlet pipe 410 for use, which is convenient to operate.

[0049] In some embodiments, the number of the gas nozzles 700 can be multiple.

[0050] In some embodiments, a storage slot 810 is provided on the storage box 800 , and a buckle 820 is provided on the slot wall of the storage slot 810 . The buckle 820 is used to snap into the air nozzle 700 to achieve storage of the air nozzle 700 .

[0051] The technical features of the above-described embodiments may be arbitrarily combined. To make the description concise, not all possible combinations of the technical features in the above-described embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0052] The above-mentioned embodiments only express several implementation methods of the utility model, and the description is relatively specific and detailed, but it cannot be understood as limiting the scope of the utility model patent. It should be pointed out that for ordinary technicians in this field, several modifications and improvements can be made without departing from the concept of the utility model, which all belong to the protection scope of the utility model. Therefore, the protection scope of the utility model patent shall be based on the attached claims.

[0053] In the description of the present invention, it should be understood that the terms "axial", "radial", "circumferential", "length", "width", "thickness", "center", "longitudinal", "lateral", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise" and the like indicating orientations or positional relationships are based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present invention.

[0054] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include at least one of the features. In the description of the present utility model, the meaning of "plurality" is at least two, such as two, three, etc., unless otherwise clearly and specifically defined.

[0055] In the present utility model, unless otherwise clearly specified and limited, a first feature being "above" or "below" a second feature may mean that the first and second features are in direct contact, or the first and second features are in indirect contact through an intermediate medium. Moreover, a first feature being "above", "above" or "above" a second feature may mean that the first feature is directly above or obliquely above the second feature, or simply means that the first feature is higher in level than the second feature. A first feature being "below", "below" or "below" a second feature may mean that the first feature is directly below or obliquely below the second feature, or simply means that the first feature is lower in level than the second feature.

[0056] In the present invention, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", "fixed" and the like 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 a direct connection or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements, unless otherwise clearly defined. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0057] It should be noted that when an element is referred to as being "located on", "fixed on" or "set on" another element, it may be directly on the other element or there may be a central element. When an element is considered to be "connected to" another element, it may be directly connected to the other element or there may be a central element at the same time. The terms "vertical", "horizontal", "upper", "lower", "left", "right" and similar expressions used herein are for illustrative purposes only and do not represent the only implementation method.

[0058] In the description of this specification, the description of reference terms such as "one embodiment", "other implementation methods" and the like means that the specific features, structures, materials or features described in conjunction with the embodiment or example are included in at least one embodiment or example of the utility model. In this specification, the schematic descriptions of the above terms do not necessarily refer to the same embodiment or example. Unless otherwise defined, all technical and scientific terms used herein have the same meaning as those commonly understood by technicians in the technical field of this application. The terms used herein in the specification of this application are only for the purpose of describing specific embodiments and are not intended to limit this application.

Claims

1. An inflator, characterized in that: include: air pump; Control circuit board; An air pressure sensor electrically connected to the control circuit board; An air intake passage, one end of which is connected to the air pump and the other end of which is used for inflation; An air leakage passage, one end of which is connected to the air intake passage, and the other end of which is arranged to be open or closed under the control of the control circuit board; Wherein, the inflator has a first state and a second state; the air pressure sensor is capable of detecting the air pressure of the intake passage; in the first state, the air pressure sensor detects that the air pressure of the intake passage is lower than a preset air pressure value, and the control circuit board controls the deflation passage to be closed and turns on the air pump to inflate; in the second state, the air pressure sensor detects that the air pressure of the intake passage is higher than the preset air pressure value, and the control circuit board controls the deflation passage to be opened to deflate.

2. The inflator according to claim 1, characterized in that: The air leakage passage includes a solenoid valve and a air leakage pipe, one end of the air leakage pipe is connected to the air intake passage, and the other end of the air leakage pipe is connected to the solenoid valve. The solenoid valve is provided with a pressure relief port, and the solenoid valve is electrically connected to the control circuit board and can open or close the pressure relief port under the control of the control circuit board.

3. The inflator according to claim 1, characterized in that: The air intake passage includes a multi-way connector, an air charging pipe and an air intake pipe, one end of the air intake pipe is connected to the air pump, the other end of the air intake pipe is connected to the first end of the multi-way connector, the second end of the multi-way connector is connected to one end of the air charging pipe, and the other end of the air charging pipe is used for inflation.

4. The inflator according to claim 3, characterized in that: The inflator further includes a detection tube, one end of which is connected to the third end of the multi-way connector, and the other end of which is connected to the air pressure sensor. The air pressure sensor can detect the air pressure through the detection tube.

5. The inflator according to claim 4, characterized in that: The air leakage passage includes a solenoid valve and a air leakage pipe, one end of the air leakage pipe is connected to the fourth end of the multi-way connector, and the other end of the air leakage pipe is connected to the solenoid valve. The solenoid valve is provided with a pressure relief port. The solenoid valve is electrically connected to the control circuit board and can open or close the pressure relief port under the control of the control circuit board.

6. The inflator according to claim 5, characterized in that The multi-way joint is a four-way joint, and the air intake pipe, the air charging pipe, the detection pipe and the air release pipe are connected through the four-way joint.

7. The inflator according to claim 3, characterized in that: The inflator also includes a shell, the control circuit board, the air pressure sensor, the air leakage passage and the air intake passage are all arranged in the shell, and a through hole is opened on the shell, and one end of the inflation tube used for inflation can extend out of the through hole.

8. The inflator according to claim 7, characterized in that The inflator further comprises a control screen, which is arranged on the outer surface of the shell and is electrically connected to the control circuit board. The control screen can be used to change the preset air pressure value.

9. The inflator according to claim 8, characterized in that The inflator has multiple working modes, and the preset air pressure value of each working mode is different. The control screen can be used for user operation to switch the inflator between the multiple working modes; the inflator also includes an air nozzle, and the number of the air nozzles is set to be multiple, each working mode corresponds to at least one air nozzle, and the air nozzle at one end of the inflation tube used for inflation is detachably connected.

10. The inflator according to claim 7, characterized in that The inflator further comprises a lighting device, which is arranged on the housing and electrically connected to the control circuit board, and the light-emitting surface of the lighting device faces outwards.

11. The inflator according to claim 7, characterized in that The shell includes a first shell and a second shell, and the first shell and the second shell are detachably connected and enclosed to form a receiving cavity.

12. The inflator according to claim 7, characterized in that The inflator further includes a heat dissipation fan disposed in the housing.

13. The inflator according to claim 9, characterized in that The inflator further comprises a storage box, which is arranged on the outer surface of the shell and is used to store at least one of the air nozzles.

14. The inflator according to claim 13, characterized in that The storage box is provided with a storage groove, and a buckle is provided on the groove wall of the storage groove, and the buckle is used to clamp the air nozzle to achieve the storage of the air nozzle.

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