System including recovery pump and vacuum pump
AssigneeMilwaukee Electric Tool Corporation
InventorsAlex H. Boll, Aaron C. Grode, Ryan J. Denissen, Justin Miller
Life of this patent
Estimating the term…
Abstract
A system attachable to a refrigeration circuit, the system including a pump assembly attachable to the refrigeration circuit, the pump assembly including a pump, and an accessory attachable to the refrigeration circuit concurrently with the pump assembly. Where the pump assembly is configured to receive the first signal from the accessory via a first wireless communication interface, and where the pump assembly is operable in a fluid removal state, in which the pump removes a fluid from the refrigeration circuit when the electric motor is activated, and in a fluid supply state, in which refrigerant is supplied to the refrigeration circuit.
Claims21
A system attachable to a refrigeration circuit, the system comprising:
- a pump assembly attachable to the refrigeration circuit, the pump assembly including
- a pump,
- an electric motor for driving the pump, and
- a first controller for controlling the operation of the electric motor, the firstcontroller having a first communication interface;
- an accessory attachable to the refrigeration circuit concurrently with the pump assembly, the accessory including
- a sensor for detecting a characteristic value of the refrigeration circuit, and
- an accessory controller electrically connected with the sensor to receive a first signal therefrom corresponding with the characteristic value of the refrigeration circuit, the accessory controller having a second communication interface;
- and
- wherein the first controller is configured to receive the first signal from the second communication interface of the accessory via the first communication interface, and
- wherein the pump assembly is operable in a fluid removal state, in which the pump removes a fluid from the refrigeration circuit when the electric motor is activated, and in a fluid supply state, in which refrigerant is supplied to the refrigeration circuit.
A system attachable to a refrigeration circuit, the system comprising:
- a pump assembly attachable to the refrigeration circuit, the pump assembly including
- a pump,
- an electric motor for driving the pump,
- a valve, and
- a first controller, the first controller having a first communication interface;
- and
- a scale configured to measure the weight of a canister via a sensor, the scale including an on-board controller which has a second communication interface for wirelessly communicating with the first controller via the first communication interface;
- wherein the pump assembly is operable in a fluid removal state, in which the pump removes a fluid from the refrigeration circuit when the electric motor is activated and transfers the fluid to the canister, and in a fluid supply state, in which refrigerant is supplied to the refrigeration circuit from the canister.
A method of charging a refrigeration circuit using a pump assembly including a pump, an electric motor for driving the pump, a valve, and a first controller, the method comprising:
- controlling the valve with the first controller to place the pump in fluid communication with the refrigeration circuit;
- operating the pump assembly in a fluid removal state by activating the motor to drive the pump to remove fluid from the refrigeration circuit;
- monitoring the pressure in the refrigeration circuit and deactivating the motor when a predetermined pressure threshold is reached;
- automatically performing a decay test;
- and
- after completing the decay test, beginning a charging operation by operating the pump assembly in a fluid supply state in which refrigerant is returned to the refrigeration circuit from a canister.
Dependencies are inferred from the claim text.