Handheld electric sprayer with negative-pressure soft liquid bag

A handheld electric sprayer with a negative-pressure soft liquid bag, the handheld electric sprayer comprising a sprayer body, a motor, and a plunger pump assembly, wherein the motor and the plunger pump assembly are arranged in the sprayer body, wherein a transmission mechanism rotatably connected with the motor is arranged in the sprayer body, a slider for connecting the transmission mechanism and the plunger pump assembly is arranged between the transmission mechanism and the plunger pump assembly, and limiting parts are arranged between the slider and the sprayer body;

• the plunger pump assembly comprises a piston rod, and when the motor drives the transmission mechanism to rotate, the slider drives the piston rod to stretch and retreat and generate the negative-pressure;
• a storage device detachably connected with the sprayer body is arranged on an outer side of the sprayer body, and the storage device is connected with the plunger pump assembly;
• and
• a pressure relief device connected with the plunger pump assembly is arranged on the plunger pump assembly, and a return passage is arranged between the pressure relief device and the storage device
• wherein the transmission mechanism comprises a mounting bracket, a mounting platform, a reduction gear, a transmission shaft, an eccentric cam and a limiting disk;
• the mounting bracket and the mounting platform are fixedly mounted on the sprayer body, and the transmission shaft is mounted on the mounting bracket and the mounting platform by means of bearings respectively;
• a first gear rotating synchronously with the motor is arranged on the motor and meshes with the reduction gear;
• and
• the reduction gear and the eccentric cam which rotate synchronously with the transmission shaft are arranged on the transmission shaft, and the limiting disk rotating synchronously with the eccentric cam is disposed around the eccentric cam and slidably connected with the slider,
• wherein a pair of first limiting grooves is formed in the slider, and the limiting disk is arranged in the pair of first limiting grooves;
• the limiting disk fits the pair of first limiting grooves in outer contour;
• the limiting parts are arranged at two open ends of the slider respectively, and each of the limiting parts has a first end surface attached to the slider and a second end surface attached to the sprayer body;
• and
• a second limiting groove to be connected with the piston rod is formed in an outer side of the slider.

A handheld electric sprayer with a negative-pressure soft liquid bag, the handheld electric sprayer comprising a sprayer body, a motor, and a plunger pump assembly, wherein the motor and the plunger pump assembly are arranged in the sprayer body, wherein a transmission mechanism rotatably connected with the motor is arranged in the sprayer body, a slider for connecting the transmission mechanism and the plunger pump assembly is arranged between the transmission mechanism and the plunger pump assembly, and limiting parts are arranged between the slider and the sprayer body;

• the plunger pump assembly comprises a piston rod, and when the motor drives the transmission mechanism to rotate, the slider drives the piston rod to stretch and retreat and generate the negative-pressure;
• a storage device detachably connected with the sprayer body is arranged on an outer side of the sprayer body, and the storage device is connected with the plunger pump assembly;
• and
• a pressure relief device connected with the plunger pump assembly is arranged on the plunger pump assembly, and a return passage is arranged between the pressure relief device and the storage device
• wherein the plunger pump assembly comprises a multi-way connector and a pump body, a storage mounting base threadedly connected with the multi-way connector is arranged on the multi-way connector;
• a storage device threadedly connected with the storage mounting base is arranged on the storage mounting base, and a filter device is arranged in the storage mounting base;
• a feed inlet and a discharge outlet are formed in the multi-way connector;
• a first check valve ball is arranged between the feed inlet and the filter device, and a second check valve ball is arranged between the discharge outlet and the pump body;
• a pressure relief port is formed in the multi-way connector, and a pressure relief device detachably connected with the multi-way connector is arranged at an open end of the multi-way connector;
• and
• a return port is formed in the multi-way connector, and the return passage connected with the return port is arranged at the return port,
• wherein the storage device comprises a storage bag, a sealing cover and an adapter;
• the storage bag is threadedly connected with the adapter, the sealing cover threadedly connected with the adapter is arranged on the adapter, and the adapter is threadedly connected with the storage mounting base;
• the filter device is arranged between the storage mounting base and the adapter, a bottom of the filter device is attached to an end surface of the storage mounting base, and a bracket of the filter device is attached to an end surface of the adapter;
• and
• a filter screen of the filter device faces the adapter.