Knapsack sprayer

Abstract

The utility model discloses a backpack type sprayer, which is characterized by comprising a liquid storage device, a sprayer body and a controller, and is characterized in that the liquid storage device is used for storing liquid; a nozzle configured to spray a liquid; an operating device connected to the reservoir and the nozzle and allowing a user to hold to control the spraying direction of the nozzle; the power unit is powered by the battery pack and comprises a motor and a pump, and the motor drives the pump to extract the liquid in the liquid storage device; the pump comprises a water inlet and a water outlet, and the maximum pressure borne by the water outlet is larger than or equal to 120 Psi. The backpack sprayer is good in spraying performance when used.

Description

Technical Field

[0001] This application relates to the technical field of power tools, and particularly to a backpack sprayer. Background Art

[0002] A kind of backpack sprayer in the related art is usually used for spraying work. The backpack sprayer includes a motor and a pump. The motor is used to drive the pump to work, suck the liquid at the liquid source into the machine, and pressurize the liquid. The pressurized liquid is further transported by the pump to the nozzle and dispersed into small droplet particles for spraying, thus realizing spraying. The backpack sprayer is usually used in scenarios such as agricultural irrigation and gardening plant cultivation. The user carries the water source on the back and performs work such as irrigating plants, moisturizing, and spraying pesticides.

[0003] Users usually need to spray different types of liquids according to the usage scenarios, such as clear water, liquid medicine, fertilizer solution, etc. Different liquids have different viscosities, and more viscous liquids require greater spraying pressure to achieve an ideal spraying distance. In some cases, users need to spray plants at high places or far away, or knock off dust or insects on plants through spraying. Therefore, there is an urgent need in the market for a backpack sprayer with better spraying performance.

[0004] This part provides background information related to this application, and these background information are not necessarily prior art. Summary of the Utility Model

[0005] An object of this application is to solve or at least alleviate part or all of the above problems. For this purpose, the object of this application is to provide a backpack sprayer with good spraying performance.

[0006] To achieve the above object, this application adopts the following technical solutions:

[0007] A backpack sprayer, characterized by comprising: a liquid reservoir configured to store liquid; a nozzle configured to spray liquid; an operating device connected to the liquid reservoir and the nozzle and allowing a user to hold to control the spraying direction of the nozzle; a power unit powered by a battery pack, the power unit including a motor and a pump, the motor driving the pump to extract the liquid in the liquid reservoir; the pump includes an inlet and an outlet, and the maximum pressure that the outlet can withstand is greater than or equal to 120 Psi.

[0008] In some embodiments, the maximum pressure that the outlet can withstand is greater than or equal to 150 Psi.

[0009] In some embodiments, the power of the motor is greater than or equal to 60W and less than or equal to 200W.

[0010] In some embodiments, the power of the motor is greater than or equal to 100W.

[0011] In some embodiments, the pump is a piston pump.

[0012] In some embodiments, the piston pump includes a one-way inlet valve, a piston, and a swash plate. The liquid is configured to flow through the one-way inlet valve, and the swash plate rotates to drive the piston to reciprocate, so as to pressurize the liquid passing through the one-way inlet valve.

[0013] In some embodiments, the overall length of the pump is greater than or equal to 100 mm and less than or equal to 150 mm.

[0014] In some embodiments, the voltage of the battery pack is greater than or equal to 36V.

[0015] In some embodiments, the material of the pump includes corrosion-resistant material.

[0016] A backpack sprayer, characterized by comprising: a liquid reservoir configured to store liquid; a nozzle configured to spray liquid; an operating device connected to the liquid reservoir and the nozzle and allowing a user to hold to control the spraying direction of the nozzle; a power unit powered by a battery pack, the power unit including a brushless motor and a pump, the brushless motor driving the pump to draw the liquid in the liquid reservoir and deliver the liquid to the nozzle for spraying; the maximum spraying distance of the nozzle is greater than or equal to 6 m.

[0017] The beneficial effect of the present application is that the backpack sprayer has good spraying performance when in use. Description of the Drawings

[0018] Figure 1 is a front view of a backpack sprayer of the present application;

[0019] Figure 2 is Figure 1 the rear view of the backpack sprayer in

[0020] Figure 3 is Figure 1 the side view of the backpack sprayer in after removing the handle;

[0021] Figure 4 is Figure 3 the cross-sectional view of the backpack sprayer in along the x1 line;

[0022] Figure 5 is Figure 1 the perspective view of the backpack sprayer in showing the joint;

[0023] Figure 6 is Figure 1 the perspective view of a partial housing and the power unit of the backpack sprayer in ;

[0024] Figure 7 is Figure 1 the side view of the power unit of the backpack sprayer in ;

[0025] Figure 8 is Figure 1 a top view of the operating device of the knapsack sprayer in

[0026] Figure 9 is Figure 8 a cross-sectional view of the operating device in along line x2;

[0027] Figure 10 is Figure 1 a perspective view of one angle of the second operating member of the knapsack sprayer in

[0028] Figure 11 is Figure 1 a perspective view of another angle of the second operating member of the knapsack sprayer in

[0029] Figure 12 is Figure 1 a side view of the operating device of the knapsack sprayer in the initial state after removing a part of the housing in

[0030] Figure 13 is Figure 12 a side view of the operating device of the knapsack sprayer in the pre-trigger state after removing a part of the housing in

[0031] Figure 14 is Figure 12 a side view of the operating device of the knapsack sprayer in the trigger state after removing a part of the housing in

[0032] Figure 15 is Figure 1 a rear view of the power unit of the knapsack sprayer in

[0033] Figure 16 is Figure 15 a cross-sectional view of the power unit in

[0034] Figure 17 is Figure 1 a plan view of the second operating member and the locking member of another embodiment of the knapsack sprayer in

[0035] Figure 18 is Figure 1 a plan view of the operating device of another embodiment of the knapsack sprayer in Detailed Description of the Embodiments

[0036] Before explaining any embodiment of the present application in detail, it should be understood that the present application is not limited to the structural details and component arrangements set forth in the following description or shown in the above drawings.

[0037] In this application, the terms "comprise", "include", "have" or any other variant thereof are intended to cover non-exclusive inclusion, such that a process, method, article or device comprising a series of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such process, method, article or device. Without further limitation, an element defined by the statement "comprising an..." does not exclude the presence of additional identical elements in the process, method, article or device comprising such element.

[0038] In this application, the term "and / or" describes an associative relationship between associated objects and indicates that three relationships may exist. For example, A and / or B may represent: A exists alone, A and B exist simultaneously, and B exists alone. Additionally, in this application, the character " / " generally indicates that the associated objects before and after are in an "and / or" relationship.

[0039] In this application, the terms "connect", "combine", "couple", "mount" may be direct connection, combination, coupling or mounting, or may be indirect connection, combination, coupling or mounting. For example, direct connection means that two parts or components are connected together without an intermediate member, and indirect connection means that two parts or components are respectively connected to at least one intermediate member, and these two parts or components are connected through the intermediate member. In addition, "connect" and "couple" are not limited to physical or mechanical connection or coupling, and may include electrical connection or coupling.

[0040] In this application, those of ordinary skill in the art will understand that relative terms used in connection with a quantity or condition (such as "about", "approximately", "substantially", etc.) are intended to include the recited value and have the meaning indicated by the context. For example, such relative terms include at least the degree of error associated with the measurement of a particular value, tolerances due to manufacturing, assembly, use associated with a particular value, etc. Such terms should also be considered to disclose a range defined by the absolute values of two endpoints. Relative terms may refer to a plus or minus of a certain percentage (such as 1%, 5%, 10% or more) of the indicated value. A numerical value without a relative term should also be disclosed as a particular value having a tolerance. In addition, when expressing a relative angular positional relationship (such as substantially parallel, substantially perpendicular), "substantially" may refer to a plus or minus a certain number of degrees (such as 1 degree, 5 degrees, 10 degrees or more) based on the indicated angle.

[0041] In this application, those of ordinary skill in the art will understand that the functions performed by a component may be performed by one component, multiple components, one part, or multiple parts. Similarly, the functions performed by a part may also be performed by one part, one component, or a combination of multiple parts.

[0042] In this application, the orientation terms such as "upper", "lower", "left", "right", "front", and "back" are described based on the orientation and positional relationship shown in the drawings, and should not be construed as a limitation on the embodiments of this application. In addition, in the context, it should also be understood that when it is mentioned that an element is connected "above" or "below" another element, it can not only be directly connected "above" or "below" another element, but also be indirectly connected "above" or "below" another element through an intermediate element. It should also be understood that the orientation terms such as the upper side, the lower side, the left side, the right side, the front side, and the back side not only represent the positive orientation, but can also be understood as the side orientation. For example, the lower side can include directly below, lower left, lower right, lower front, and lower back, etc.

[0043] In this application, the terms "controller", "processor", "central processing unit", "CPU", and "MCU" can be used interchangeably. When using the units "controller", "processor", "central processing unit", "CPU", or "MCU" to perform specific functions, unless otherwise specified, these functions can be performed by a single one of the above units or multiple of the above units.

[0044] In this application, the terms "device", "module", or "unit" can be implemented in the form of hardware or software in order to achieve specific functions.

[0045] In this application, the terms "calculate", "judge", "control", "determine", "identify", etc. refer to the operations and processes of a computer system or a similar electronic computing device (such as a controller, a processor, etc.).

[0046] The technical solution of this application will be further described below with reference to the drawings and through specific embodiments.

[0047] Such as Figures 1 to 4As shown, the backpack sprayer 1 includes a main body 100, a handle 140, a water pipe 146, and a strap 147. A strap 147 is connected to the main body 100 for the user to carry on the back. The main body 100 includes a liquid reservoir 110. The liquid reservoir 110 is arranged to store liquid. The liquid reservoir 110 is substantially separated from the rest of the devices in the main body 100 to prevent liquid leakage. In some embodiments, the liquid reservoir 110 includes a waterproof component for further waterproofing. The main body 100 includes a housing 111. In this embodiment, the housing 111 forms the liquid reservoir 110. In some embodiments, the liquid reservoir 110 can also be a separate device disposed within the housing 111. The liquid reservoir 110 includes a receiving chamber 112 and a filling port 113. The user injects liquid into the receiving chamber 112 from the filling port 113. In this way, when the user uses the backpack sprayer 1, the user can move while carrying the liquid stored in the receiving chamber 112, that is, move while carrying the water source required for spraying. The backpack sprayer 1 is portable to use. The volume of the liquid reservoir 110 is greater than or equal to 15L and less than or equal to 25L. In some embodiments, the volume of the liquid reservoir 110 is greater than or equal to 10L and less than or equal to 20L. In some embodiments, the volume of the liquid reservoir 110 is greater than or equal to 20L and less than or equal to 30L.

[0048] The handle 140 is connected to the main body 100 through a flexible water pipe 146, so that the handle 140 is movable relative to the main body 100. In some embodiments, a storage portion 114 is provided on the main body 100 for the user to store the handle 140. In this embodiment, there can be multiple storage portions 114. The handle 140 can be stored in multiple positions, which is convenient to use. In some embodiments, the strap 147 includes a waistband 148, and the waistband 148 includes a slot 149 for the user to store the handle 140. In some embodiments, a sunshade can be installed on the main body 100 to shield the sun for the user. The sunshade can be installed on the main body 100 through the storage portion 114 for storing the handle 140.

[0049] The handle 140 includes a nozzle 141 and an operating device 142. The nozzle 141 is arranged to communicate with the liquid reservoir 110 to spray liquid. The nozzle 141 includes a water spraying hole 118. The liquid is sprayed from the water spraying hole 118 onto the plants. The nozzle 141 can be a long nozzle or a short nozzle. In this embodiment, the nozzle 141 is a long nozzle. The long nozzle allows the liquid to flow in the nozzle 141 for a period of time before spraying, which is convenient for probing into thick plants for spraying. Different types of nozzles can also be installed on the nozzle 141. In some embodiments, the nozzle 141 itself or after installing accessories can be adjusted by the user to change the size, shape, or the number of water spraying holes 118 exposed. The specific structure of the nozzle 141 is not limited herein.

[0050] The operating device 142 is connected to the liquid reservoir 110 and the nozzle 141. The operating device 142 includes a grip portion 143 which allows a user to hold it. When using the backpack sprayer 1, the user carries the main body 100 on the back, holds the operating device 142 with a hand, and then moves the arm to control the spraying direction of the nozzle 141. The main body 100, the water pipe 146, the operating device 142, and the nozzle 141 are connected in sequence. The operating device 142 connects the water pipe 146 and the nozzle 141.

[0051] As Figures 4 to 5 shown, the backpack sprayer 1 further includes a power unit 150 and a coupling portion 155. The power unit 150 is powered by a battery pack 154. The battery pack 154 is detachably mounted to the coupling portion 155. In this way, after the battery pack 154 runs out of power, the user removes the battery pack 154 from the coupling portion 155 and charges the battery pack 154 to repeatedly use the battery pack 154 to power the power unit 150. The user does not need to use a fixed-position AC power cord, so that the backpack sprayer 1 is convenient to use and has good portability. In this embodiment, the coupling portion 155 is at least partially disposed below the liquid reservoir 110. The coupling portion 155 includes a baffle. The user rotates the baffle to expose the coupling portion 155 and inserts and removes the battery pack 154. In some embodiments, the coupling portion 155 may also be located at other positions on the main body 100. The voltage of the battery pack 154 is greater than or equal to 36V. In this way, the backpack sprayer 1 has a long battery life, strong power, and is convenient to use.

[0052] As Figures 5 to 7 shown, the main body 100 includes a receiving portion 115. The power unit 150 is disposed in the receiving portion 115. The power unit 150 includes a motor 151 and a pump 170. The pump 170 is fluidly connected to the liquid reservoir 110. The motor 151 drives the pump 170 to extract the liquid in the liquid reservoir 110. The pump 170 is fluidly connected to the water pipe 146. After the pump 170 extracts the liquid in the liquid reservoir 110, the liquid is sequentially conveyed through the water pipe 146 to the operating device 142 and the nozzle 141 so that the liquid is ejected. In this embodiment, the receiving portion 115 is at least partially located below the liquid reservoir 110. The coupling portion 155 is located at the center of the receiving portion 115 and divides the receiving portion 115 into left and right parts. The coupling portion 155 is substantially separated from the receiving portion 115 by a housing 111 to prevent dust from falling into the receiving portion 115. The motor 151 is a brushless motor, so that the backpack sprayer 1 has strong power and high working efficiency.

[0053] As Figure 6 , Figure 8 and Figure 9As shown, the backpack sprayer 1 includes a first operating member 120. The first operating member 120 is provided on the operating device 142. The user operates the first operating member 120 to allow or prohibit the start of the motor 151. The first operating member 120 also allows the user to operate to adjust the rotational speed of the motor 151. The first operating member 120 is provided on the operating device 142, so that the user can easily and conveniently operate the first operating member 120 to allow the start of the motor 151 and adjust the rotational speed of the motor 151. In an actual use scenario, the user can operate the first operating member 120 to allow the start of the motor 151 and adjust the rotational speed of the motor 151 while holding the operating device 142. The permission for the motor 151 to start is a necessary process for the user to use the backpack sprayer 1. The user can first hold the operating device 142 according to their own usage habits, and then operate the first operating member 120 to allow the motor 151 to start. During this period, the user's hand can leave the operating device 142 or not, which is convenient to use.

[0054] When the rotational speed of the motor 151 is adjusted, the flow rate of the nozzle 141 is adjusted. When the user switches the liquid source to be sprayed, for example, from spraying clear water to spraying pesticides, the user can easily and conveniently adjust the rotational speed of the motor 151 by operating the first operating member 120, thereby adjusting the flow rate of the nozzle 141. In this way, the user can obtain different spraying effects by operating the first operating member 120 according to different use scenarios, for example, adjusting the size of the spraying range, the distance, etc. During the user's spraying process, the user can also directly operate the first operating member 120 without leaving the operating device 142, without stopping the work in progress, with high work efficiency and convenient use of the backpack sprayer 1.

[0055] The operating device 142 is substantially cylindrical, and the length of the operating device 142 is substantially the same as the length of the user's hand. In this embodiment, the operating device 142 is slightly longer than the user's hand. The first operating member 120 is provided at one end of the operating device 142 away from the liquid reservoir 110. That is to say, when the user holds the operating device 142 with the hand, the first operating member 120 is closer to the user's fingers relative to the user's elbow. In this way, the user can hold the operating device 142 with the palm and several fingers and operate the first operating member 120 with several other fingers. The operating functions of the first operating member 120 include allowing the motor 151 to start and adjusting the rotational speed of the motor 151. The first operating member 120 can be operated by the user to multiple gears. In this embodiment, the first operating member 120 is a knob. The user operates the knob to rotate around the first axis 101 to allow the motor 151 to start and adjust the rotational speed of the motor 151. The operating device 142 includes a first elastic member 120b. The first elastic member 120b is fixed in the operating device 142. The first operating member 120 is connected with a prism 120a. The prism 120a moves with the first operating member 120 and abuts against the first elastic member 120b. In this way, when the first operating member 120 moves to different gears, the first elastic member 120b abuts against different prism surfaces of the prism 120a and generates a feedback force, playing a prompting role, which makes it more convenient for the user to operate.

[0056] The multiple gears to which the first operating member 120 can move include off (off), on (on), first speed, second speed, third speed, and fourth speed gears. When the first operating member 120 is operated to the off gear, the first operating member 120 prevents the motor 151 from starting. When the first operating member 120 is operated to the on gear, the first operating member 120 allows the motor 151 to start. The on gear is also the initial speed gear. In this way, when the first operating member 120 is operated to the on gear, the motor 151 can rotate at the initial speed. When the first operating member 120 is operated to the first speed, second speed, third speed, or fourth speed gear, the motor 151 can rotate at the first speed, second speed, third speed, or fourth speed respectively. In some embodiments, the first operating member 120 may also include fewer or more gears. In some embodiments, the first operating member 120 may also be an operating member in various forms such as a button, a toggle, a lever, etc., which is not limited herein.

[0057] The knapsack sprayer 1 further includes a control device 160. The control device 160 outputs a control signal to control the motor 151 to drive the pump 170 to work.

[0058] The first operating member 120 is connected to an electronic signal transmitter 162. When the user operates the first operating member 120 to different positions, the electronic signal transmitter 162 senses the position of the first operating member 120 to detect the gear position where the first operating member 120 is located, and sends different position signals to the control device 160 according to the gear position where the first operating member 120 is located. The control device 160 adjusts the rotational speed of the motor 151 according to the gear position of the first operating member 120.

[0059] The knapsack sprayer 1 includes a display device 133. The display device 133 displays the gear position where the first operating member 120 is located. In this way, the user can clearly know the gear position where the first operating member 120 is located. The indication content of the display device 133 changes with the change of the user's operation. In this way, the user can know in real time the position where the first operating member 120 is located, that is, know in real time the rotational speed of the motor 151. The first operating member 120 is convenient and fast to use. The display device 133 is integrated on the first operating member 120. In this way, the display device 133 is also located at hand for the user to observe, and the operating device 142 has a compact structure. In this embodiment, the display device 133 includes LED lights. When the first operating member 120 is in different gear positions, the lighting positions of the display device 133 are different. The surface of the first operating member 120 is engraved with numbers and letters. Different lighting positions correspond to different numbers and letters to indicate the gear position where the first operating member 120 is located. In some embodiments, when the first operating member 120 is in different gear positions, the brightness or color of the display device 133 is different. The indication form of the display device 133 is not limited herein. In some embodiments, the display device 133 is a sticker marked with gear markings. An indication mark, such as a scale line, is formed on the operating device 142. When the first operating member 120 rotates, different gear markings marked on the display device 133 are respectively aligned with the indication marks on the operating device 142 to play a role in indicating the gear position. In some embodiments, marks such as scale lines are formed on the display device 133. The specific structure and form of the display device 133 are not limited herein, as long as it can play a role in displaying information.

[0060] The knapsack sprayer 1 further includes a second operating member 122. The user operates the second operating member 122 to allow or prohibit the motor 151 from starting. The knapsack sprayer 1 further includes a valve 137. The valve 137 can be in fluid communication with the pump 170. When the valve 137 is in fluid communication with the pump 170, the water in the reservoir 110 flows to the valve 137. The valve 137 has a closed state that prevents liquid from passing through the valve 137 and an open state that allows liquid to pass through the valve 137. The user also operates the second operating member 122 to switch the valve 137 between the closed state and the open state. In this embodiment, the valve 137 is a mechanical valve 137. In some embodiments, the valve 137 is a check valve 137.

[0061] The control device 160 controls the motor 151 to start according to whether the first operating member 120 and the second operating member 122 meet a preset condition. The motor 151 starts when the trigger and the knob meet the preset condition. The control device 160 includes a circuit board assembly 161, and the circuit board assembly 161 is arranged on one side of the pump 170 close to the battery pack 154. A chamber 119 is formed on the bottom plate of the housing 111, and the circuit board assembly 161 is arranged in the chamber 119 and is connected to the device to be controlled through wires.

[0062] Both the first operating member 120 and the second operating member 122 have a trigger state. In the trigger state, the first operating member 120 allows the motor 151 to start. In the trigger state, the second operating member 122 allows the motor 151 to start. When both the first operating member 120 and the second operating member 122 allow the motor 151 to start, that is, when both the first operating member 120 and the second operating member 122 are in the trigger state, the control device 160 starts the motor 151 and controls the rotation speed of the motor 151 based on the setting of the first operating member 120. That is to say, only when the user operates the first operating member 120 and the second operating member 122 and makes both the first operating member 120 and the second operating member 122 in the trigger state, that is, when both the first operating member 120 and the second operating member 122 allow the motor 151 to start, the control device 160 will control the motor 151 to start and the user can use the knapsack sprayer 1 to work. In this way, the knapsack sprayer 1 is safe and reliable to use.

[0063] The second operating member is arranged on the operating device 142. The user can operate the second operating member 122 while holding the operating device 142, which is convenient to use. Both the first operating member 120 and the second operating member 122 are arranged on the operating device 142. In this way, the operating members for controlling and safely starting the motor 151 are integrated on the operating device 142. The user can hold the operating device 142 while operating the first operating member 120 and the second operating member 122. The operating device 142 has a compact structure and is convenient to use.

[0064] The second operating member 122 is first operated by the user to switch from a state where the motor 151 is prohibited from starting to a state where the motor 151 is allowed to start. Then, the second operating member 122 is further operated by the user to switch the valve 137 from a closed state to an open state. The backpack sprayer 1 further includes a second switch 121. The second switch 121 is installed in the operating device 142. The second operating member is operated by the user to trigger the second switch 121. The second switch 121 has two states: "on" and "off". If the second switch 121 is not triggered, the second switch 121 is in the "off" state. When the second switch 121 is triggered, it switches to the "on" state. When the second switch 121 is triggered, the second operating member 122 allows the motor 151 to start. The second switch 121 can be a micro switch. In some embodiments, the second switch 121 can also be other types of switches, such as a Hall switch, etc. The second operating member 122 is a push-type operating member. The user presses the second operating member 122 to change the position of the second operating member 122. The second operating member 122 pivots about the first pivot axis 102 and pivots in the first pivot direction a to trigger the second switch 121. When the second switch 121 is triggered, the second operating member 122 allows the motor 151 to start. The distance of the valve 137 relative to the first pivot axis 102 is shorter than the distance of the switch relative to the first pivot axis 102. The operating device 142 extends substantially along the first straight line 11. In the extending direction of the first straight line 11, the valve 137 is closer to the first pivot axis 102, and the second switch 121 is farther from the first pivot axis 102. When the second operating member 122 rotates about the first pivot axis 102, the portion of the second operating member 122 that is farther from the first pivot axis 102 has a greater movement amplitude. The second switch 121 is farther from the first pivot axis 102. In this way, the position of the second switch 121 corresponds to the position of the portion of the second operating part with a larger movement amplitude. When the user operates the second operating member 122, the second switch 121 can respond to the movement of the second operating member 122 in a shorter time compared to the valve 137 that is closer to the first pivot axis 102. The valve 137 is closer to the first pivot axis 102. In this way, according to the lever 130 principle, the user can stably control the opening and closing of the valve 137 with a smaller force, and the operation is easy and labor-saving.

[0065] As Figures 9 to 10 shown, the second operating member 122 includes a first mounting portion 123, a contact portion 124, and a pressing portion 127. The first mounting portion 123, the contact portion 124, and the pressing portion 127 are arranged in sequence. The first mounting portion 123 is disposed around the first pivot axis 102. The pressing portion 127 is for the user to press. The contact portion 124 includes a first contact portion 125 and a second contact portion 126. The first contact portion 125 drives the valve 137 to switch between a closed state and an open state, and the second contact portion 126 drives the second switch 121 to switch between the "on" and "off" states.

[0066] AsFigure 9 and Figure 12 As shown, the backpack sprayer 1 includes a rod 130. The second operating member 122 drives the rod 130 to trigger the second switch 121. The rod 130 is movably installed within the operating device 142 and is disposed adjacent to the second switch 121. The rod 130 includes a second mounting portion 131 and a triggering portion 132. The rod 130 can pivot about a second pivot axis 103. The second mounting portion 131 is disposed around the second pivot axis 103. After the rod 130 is driven by the second operating member 122 and pivots about the second pivot axis 103 by a certain angle, the triggering portion 132 contacts and triggers the second switch 121. The second operating member 122 pivots about a first pivot axis 102 in a first pivot direction a. The rod 130 pivots about the second pivot axis 103 in a second pivot direction b. The first pivot direction a and the second pivot direction b are opposite. In this way, the second operating member 122 and the rod 130 do not interfere with each other during movement, and during the process of the user operating the second operating member 122, the loss of force is small, and the user can easily operate the second operating member 122 to trigger the second switch 121.

[0067] The valve 137 includes a movable member 138. The movable member 138 moves along a second straight line 12 to switch the valve 137 between an open state and a closed state. The movable member 138 is used to isolate the liquid on both sides of the valve 137. The structure of the valve 137 is similar to the prior art and will not be described in detail herein. When the user operates the second operating member 122, the first abutting portion 125 can abut against the movable member 138 to drive the movable member 138 to move along the second straight line 12.

[0068] Since the second switch 121 is farther from the first pivot axis 102 than the valve 137, when the user rotates the second operating member 122 during operation, the second operating member 122 will trigger the second switch 121 first.

[0069] As Figure 12 shown, when the second switch 121 is not triggered, the second operating member 122 prohibits the motor 151 from starting, and when the valve 137 is in the closed state, the second operating member 122 is in the initial state.

[0070] As Figure 13 shown, when the second switch 121 is triggered and the second operating member 122 allows the motor 151 to start, and when the valve 137 is in the closed state, the second operating member 122 is in the pre-trigger state. In the pre-trigger state, although the motor 151 starts and the liquid in the liquid storage device 110 can flow toward the valve 137 under the drive of the pump 170, the valve 137 has not yet switched to the open state, and the liquid cannot pass through the valve 137 to be ejected.

[0071] As Figure 14As shown, when the user continues to operate the second operating member 122 to rotate, the valve 137 is driven by the second operating member 122 and switched to the open state. At this time, the second operating member 122 allows the motor 151 to start, and the valve 137 is in the open state, and the second operating member 122 is in the triggered state. In the triggered state, the control device 160 controls the motor 151 to start.

[0072] In this embodiment, when the user operates the second operating member 122 to rotate 5 degrees about the first pivot axis 102, the second switch 121 is switched to the "on" state, and the second operating member 122 allows the motor 151 to start. At this time, the first abutting portion 125 just contacts the movable member 138, but does not generate a driving force on the movable member 138. When the user operates the second operating member 122 to continue rotating, the movable member 138 moves, and the valve 137 allows the liquid to pass through and is switched to the open state. When the angle that the second operating member 122 rotates along the first pivot direction a about the first pivot axis 102 is greater than or equal to 13 degrees and less than or equal to 15 degrees in total, the second operating member 122 abuts against the holding portion 143, and the holding portion 143 prevents the second operating member 122 from continuing to rotate. At this time, the moving amplitude of the movable member 138 is the largest, and the flow rate of the liquid injection reaches the maximum value.

[0073] When the user operates the second operating member 122, the second operating member 122 first starts the motor 151 in two strokes, and then opens the valve 137, so that the liquid can first flow toward the valve 137. Since the rotation amount of the second operating member 122 is small, the user can complete the two strokes of operating the second operating member 122 quickly. After the motor 151 starts, when the liquid just flows to the valve 137, the user just opens the valve 137, and the liquid can be ejected smoothly. The starting efficiency of the backpack sprayer 1 is high and the use fluency is better. When ending the work, the motor 151 stops working first, and the liquid will not continue to be delivered to the valve 137. After that, the valve 137 closes when the liquid runs out, and it is not easy to leak liquid. The backpack sprayer 1 is convenient to use. In some embodiments, the control device 160 is set to control the motor 151 to start when the valve 137 is switched from the closed state to the open state.

[0074] As Figures 11 to 14 shown, the backpack sprayer 1 includes a locking member 134. The locking member 134 cooperates with the second operating member 122 to keep the second operating member 122 in the triggered state. The locking member 134 is pivotally mounted to the operating device 142 about the third pivot axis 104. The locking member 134 includes a first locking portion 135. The second operating member 122 includes a second locking portion 128. The first locking portion 135 is a protrusion 136 protruding toward the second locking portion 128. The second locking portion 128 is a recess having a first locking groove 128a and a second locking groove 128b.

[0075] The size of the first locking groove 128a is larger than the size of the protrusion 136. The size of the second locking groove 128b is substantially the same as the size of the protrusion 136. When the second operating member 122 is in the initial state and the pre-trigger state, the protrusion 136 of the locking member 134 cooperates with the first locking groove 128a, and the locking member 134 does not lock the position of the second operating member 122. When the second operating member 122 is in the trigger state, the user can operate the locking member 134 to rotate around the third pivot axis, so that the protrusion 136 cooperates with the second locking groove 128b. The second locking groove 128b and the protrusion 136 are in interference fit, and the locking member locks the second operating member 122 in the trigger state. In this way, the user does not need to keep pressing the second operating member 122, and the operating device 142 is convenient and labor-saving to use.

[0076] As Figures 6 to 7 shown, the pump 170 includes a water inlet 171 and a water outlet 172. The liquid in the liquid storage device 110 enters the pump 170 from the water inlet 171, is pressurized inside the pump 170, leaves the pump 170 through the water outlet 172, and then enters the water pipe 146, the operating device 142, and the nozzle 141 in sequence and is ejected. The motor 151 and the pump 170 are accommodated in the accommodating portion 115. A fixing portion 116 is provided inside the accommodating portion 115. The fixing portion 116 is basically provided below the liquid storage device 110 and is located between the connecting portion 155 and the housing 111 of the main body 100 in the left-right direction. The fixing portion 116 fixes the pump 170 and the motor 151. In this embodiment, the fixing portion 116 includes a housing 117 that basically surrounds the motor 151 and the pump 170. The motor 151 and the pump 170 are installed in the housing 117 through fasteners such as screws. The housing 117 protects the motor 151 and the pump 170 from being squeezed by the liquid storage device 110 and the leakage of liquid, and prevents part of the dust from entering the housing 117. The housing 117 includes a hole 118, and the hole 118 is provided on the upper side of the housing 117. The water inlet 171 passes through the hole 118 and extends to the liquid storage device 110 to be in liquid communication with the liquid storage device 110.

[0077] As Figure 7 , Figures 15 to 16As shown, the motor 151 includes an output shaft 152 and an output gear 153. In this embodiment, the pump 170 is a piston pump. The piston pump includes a piston 174, a pressure chamber 175, and a swash plate 176. After the motor 151 is started, the output shaft 152 rotates around the third straight line 13. The output gear 153 meshes with the swash plate 176 and drives the swash plate 176 to rotate around the fourth straight line 14. There are multiple pistons 174, and the multiple pistons 174 are arranged parallel to the third straight line 13 substantially along the circumferential direction of the fourth straight line 14. The swash plate 176 abuts against one end of the piston 174 and drives the piston 174 to perform a reciprocating motion through the inclined surface when rotating. The pressure chamber 175 is substantially cylindrical. The pressure chamber 175 includes a pressure member 175a. The pressure member 175a constitutes a circular bottom surface of the pressure chamber 175. The piston 174 is fixedly connected to the pressure member 175a and drives the pressure member 175a to perform a reciprocating motion when reciprocating. The pressure chamber 175 is fluidly connected to the water inlet 171 and the water outlet 172. That is to say, the liquid in the liquid storage device 110 stays temporarily in the pressure chamber 175 through the water inlet 171. After the liquid is pressurized in the pressure chamber 175, it leaves the pressure chamber 175 from the water outlet 172. When the piston 174 reciprocates, the internal volume of the pressure chamber 175 decreases or increases with the movement of the piston 174. Thus, the pressure in the pressure chamber 175 decreases or increases. The liquid enters the pressure chamber 175 at a low pressure, is pressurized, and then leaves the pressure chamber 175 at a high pressure and is transported out of the pump 170 and into the water pipe 146. The pump 170 includes a one-way inlet valve 173a and a one-way outlet valve 173b. The liquid enters the pressure chamber 175 through the one-way inlet valve 173a. After the liquid passes over the one-way inlet valve 173a, the liquid is pressurized. The pressurized liquid is output from the pump 170 through the one-way outlet valve 173b. In this way, the flow and pressurization process of the liquid are ensured to be orderly and smooth. The piston pump can eject fine liquid droplets and has a good spraying effect.

[0078] The water outlet 172 connects the pressurizing chamber 175 and the water pipe 146. After the liquid leaves the pump 170 from the water outlet 172, it enters the water pipe 146. The maximum pressure that the water outlet 172 can withstand is greater than or equal to 120 Psi. In some embodiments, the maximum pressure that the water outlet 172 can withstand is greater than or equal to 150 Psi. In some embodiments, the maximum pressure that the water outlet 172 can withstand is greater than or equal to 80 Psi and less than or equal to 1000 Psi. In some embodiments, the maximum pressure that the water outlet 172 can withstand is approximately 100 Psi, 120 Psi, 140 Psi, 160 Psi, 180 Psi, 200 Psi, 250 Psi, 300 Psi, 400 Psi, 500 Psi, 600 Psi, 700 Psi, 800 Psi, 900 Psi, or 1000 Psi. The maximum pressure that the water outlet 172 can withstand is relatively large, so that the degree of pressurization of the liquid can reach a relatively high level, facilitating the backpack sprayer 1 to spray a relatively viscous liquid, or achieving a relatively long spray distance, meeting various working conditions, and being convenient to use.

[0079] The power of the motor 151 is greater than or equal to 100W. In some embodiments, the power of the motor 151 is greater than or equal to 60W and less than or equal to 200W. In some embodiments, the power of the motor 151 is greater than or equal to 80W and less than or equal to 150W. In some embodiments, the power of the motor 151 is greater than or equal to 100W and less than or equal to 130W. The power of the motor 151 is relatively large, so that the power of the pump 170 is strong, and the degree of pressurization of the liquid can reach a relatively high level, facilitating the backpack sprayer 1 to spray a relatively viscous liquid, or achieving a relatively long spray distance, meeting various working conditions, having good performance of the backpack sprayer 1, and being convenient to use. The motor 151 can be adapted to use with a piston pump.

[0080] The voltage of the battery pack 154 is greater than or equal to 36V. In some embodiments, the voltage of the battery pack 154 is greater than or equal to 40V. In some embodiments, the voltage of the battery pack 154 is greater than or equal to 42V. In some embodiments, the voltage of the battery pack 154 is greater than or equal to 46V. In some embodiments, the voltage of the battery pack 154 is greater than or equal to 56V. In some embodiments, the voltage of the battery pack 154 is greater than or equal to 36V and less than or equal to 66V. The voltage of the battery pack 154 is relatively large, with a long battery life, and can meet the battery life requirements of the motor 151 with a relatively large power.

[0081] The pump 170 extracts the liquid in the liquid reservoir 110 and delivers the liquid to the nozzle 141 for spraying. The maximum spraying distance of the nozzle 141 is greater than or equal to 2 m and less than or equal to 6 m. In some embodiments, the maximum spraying distance of the nozzle 141 is greater than or equal to 2.5 m and less than or equal to 5.5 m. In some embodiments, the maximum spraying distance of the nozzle 141 is greater than or equal to 3 m and less than or equal to 5 m. In some embodiments, the maximum spraying distance of the nozzle 141 is greater than or equal to 3.5 m and less than or equal to 4.5 m. In some embodiments, the maximum spraying distance of the nozzle 141 is greater than or equal to 4 m. In addition to spraying, the nozzle 141 can also eject a water column. The maximum ejection distance of the nozzle 141 is greater than or equal to 6 m. In some embodiments, the maximum ejection distance of the nozzle 141 is greater than or equal to 7 m. In some embodiments, the maximum ejection distance of the nozzle 141 is greater than or equal to 8 m. In some embodiments, the maximum ejection distance of the nozzle 141 is greater than or equal to 6 m and less than or equal to 10 m. The pump 170 is a plunger pump. The maximum spraying and ejection distances of the nozzle 141 are relatively large, so the backpack sprayer 1 can operate on plants that are relatively far from the user. The backpack sprayer 1 has good performance and is convenient to use.

[0082] The overall length of the pump 170 is greater than or equal to 100 mm and less than or equal to 150 mm. In some embodiments, the overall length of the pump 170 is greater than or equal to 110 mm and less than or equal to 140 mm. In this way, the structure of the pump 170 is compact. The backpack sprayer 1 has good spraying performance and a compact structure.

[0083] The material of the pump 170 includes corrosion-resistant materials. In this embodiment, the material of the pump 170 includes ceramics. In some embodiments, the material of the pump 170 can also include stainless steel, ruby, plastic, etc.

[0084] As Figures 17 to 18 shown, in some embodiments, the length of the second operating member 122 is less than half of the length of the operating device 142. In the up and down direction, the projections of the second operating member 122 and the holding portion 143 do not overlap. The second operating member 122 has a short length, which is convenient for the user to hold the operating device 142 and operate the second operating member 122.

[0085] Obviously, the above embodiments of the present application are merely examples for clearly explaining the present application, rather than limiting the implementation manners of the present application. For those of ordinary skill in the art, other different forms of changes or modifications can be made based on the above description. It is not necessary and impossible to enumerate all the implementation manners here. Any modifications, equivalent replacements, and improvements made within the spirit and principle of the present application shall be included in the protection scope of the claims of the present application.

Claims

1. A backpack sprayer, characterized in that: include: a liquid reservoir configured to store liquid; a nozzle configured to spray a liquid; an operating device connected to the liquid reservoir and the nozzle and allowing a user to hold it to control the spraying direction of the nozzle; A power unit, powered by a battery pack, the power unit comprising a motor and a pump, the motor driving the pump to extract the liquid in the liquid reservoir; The pump comprises a water inlet and a water outlet, and the maximum pressure that the water outlet can withstand is greater than or equal to 120 Psi.

2. The backpack sprayer according to claim 1, characterized in that The maximum pressure that the water outlet can withstand is greater than or equal to 150 Psi.

3. The backpack sprayer according to claim 1, characterized in that The power of the motor is greater than or equal to 60W and less than or equal to 200W.

4. The backpack sprayer according to claim 1, characterized in that The power of the motor is greater than or equal to 100W.

5. The backpack sprayer according to claim 2, characterized in that The pump is a plunger pump.

6. The backpack sprayer according to claim 5, characterized in that The plunger pump includes a one-way water inlet valve, a plunger and a swash plate. The liquid is arranged to flow through the one-way water inlet valve. The swash plate rotates to drive the plunger to reciprocate to pressurize the liquid passing through the one-way water inlet valve.

7. The backpack sprayer according to claim 1, characterized in that The overall length of the pump is greater than or equal to 100 mm and less than or equal to 150 mm.

8. The backpack sprayer according to claim 1, characterized in that The voltage of the battery pack is greater than or equal to 36V.

9. The backpack sprayer according to claim 1, characterized in that The material of the pump comprises a corrosion resistant material.

10. A backpack sprayer, characterized in that: include: a liquid reservoir configured to store liquid; a nozzle configured to spray a liquid; an operating device connected to the liquid reservoir and the nozzle and allowing a user to hold it to control the spraying direction of the nozzle; A power unit, powered by a battery pack, the power unit comprising a brushless motor and a pump, the brushless motor driving the pump to extract the liquid in the liquid reservoir and deliver the liquid to the nozzle for spraying; The maximum spraying distance of the nozzle is greater than or equal to 6m.

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