Handheld high-pressure cleaning machine

A handheld high-pressure cleaning machine powered by direct current, and connectable to an external water source using a water pipe;

• wherein the handheld high-pressure cleaning machine comprises a spray gun comprising:
• a housing, wherein a motor, a transmission mechanism connected to the motor, and a pump driven by the transmission mechanism are provided in the housing;
• a handle having a front end and a rear end with the front end of the handle formed on or connected to the housing;
• a detachable rechargeable battery pack coupled externally to the handle;
• and
• a nozzle connected to a water outlet of the pump whereby water from the external water source may be sprayed out through the nozzle;
• wherein the pump comprises a central chamber, a water inlet, a water outlet and a single plunger, a water inlet chamber connected to the water inlet, and a water outlet chamber connected to the water outlet, and wherein the plunger is disposed in the central chamber and is driven by the motor to perform reciprocating motion in the central chamber.

A handheld high-pressure cleaning machine without a water tank, powered by direct current, and connectable to an external water source using a water pipe;

• wherein the handheld high-pressure cleaning machine comprises a spray gun comprising:
• a housing, wherein a motor, a transmission mechanism connected to the motor, and a pump driven by the transmission mechanism are provided in the housing;
• a handle having a front end and a rear end with the front end of the handle formed on or connected to the housing;
• a detachable rechargeable battery pack coupled externally to the handle;
• and
• a nozzle connected to a water outlet of the pump whereby water from the external water source may be sprayed out through the nozzle;
• wherein the pump comprises a central chamber, a water inlet, a water outlet and a single plunger, a water inlet chamber connected to the water inlet, and a water outlet chamber connected to the water outlet, and wherein the plunger is disposed in the central chamber and is driven by the motor to perform reciprocating motion in the central chamber, and
• wherein the water inlet chamber and the water outlet chamber are located at one side of the plunger, and the external water source enters the water inlet chamber through the water inlet, is discharged from the water outlet chamber after being pressurized by the central chamber, and is sprayed outward through the nozzle.