A.o. Smith Corporation

Nanjing Institute of Advanced Laser Technology

Zhi Li

Jian Xu

Xingpeng Ru

Dongwei Zhu

Xiaorong Shao

Yinan Yang

Jun Zhou

Dayan Bi

Bu Qiu

Maohu Cai

Jianyong Ding

Chen Deng

Qikun Li

Hufu Xiao

The embodiments of the present application disclose a combustion control system of a gas water heater or wall-hanging boiler, and a control method thereof. The system comprises: a flue gas channel consisted of a combustor, a heat exchanger and a stepless speed regulating fan and a smoke tube, which are connected sequentially; a control unit connected to a signal input end of the stepless speed regulating fan; a wind pressure sensor assembly that detects a pressure signal upstream of an impeller of the stepless speed regulating fan, a signal output end of the wind pressure sensor assembly being connected to the control unit; the control unit comprising a storage for storing a correspondence relationship between the pressure signal upstream of the stepless speed regulating fan and a thermal load of the combustor, and a controller that controls operation of the stepless speed regulating fan according to the correspondence relationship. The present application further regulates the rotational speed of the stepless speed regulating fan by detecting the pressure signal upstream of the impeller of the stepless speed regulating fan, thereby achieving a better wind-resistant performance of the present application.

Combustion control system of gas water heater or wall-hanging boiler and control method thereof

It relates to a high-power laser attenuator wherein laser is incident into an attenuator housing through a lens barrel; a &#xbd; wave plate, a first lens and a second lens are arranged in sequence on an incident light path along a laser incident direction; the &#xbd; wave plate can rotate around the incident light path, and normal lines of incident planes of the two lenses and the incident light axis are set to form a Brewster angle; a laser absorber assembly is arranged in a reflected light path of the first lens.

High-power laser attenuator

A water heating system includes a first water heater having a first heating source of a first type, and a second water heater having a second heating source of a second type. The system further includes a valve having a first interface connected to the cold water source, a second interface connected to the first cold water inlet of the first water heater, a third interface connected to a second hot water outlet of the second water heater, and a fourth interface connected to the first hot water outlet of the first water heater. A motor positions the valve to one of at least three positions Finally, the system also includes a control circuit including a temperature sensor near the first hot water outlet of the first water heater, and a controller configured to control the motor based on a sensed temperature by the temperature sensor.

Water heater having a waterway changeover control apparatus and method for operating the same

A water heating system and method of operating the same. The system includes a first water heater having a first heating source of a first type. The system further includes a second water heater having a second heating source of a second type. A valve having a first interface that is connected to the cold water source, a second interface that is connected to a first cold water inlet of the first water heater, a third interface that is connected to a second hot water outlet of the second water heater, and a fourth interface connected to the hot water outlet of the first water heater. A motor positions the changeover valve to one of at least three positions. A control circuit includes a temperature sensor near the first hot water outlet of the first water heater, and a controller coupled to the first temperature sensor and the motor.

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Nanjing, China

Zhi Li