Heating water heater and control method thereof, and computer-readable storage medium

Patent metadata

Field	Value
Publication number	US-11828475-B2
Application number	US-202017764543-A
Country	US
Kind code	B2
Filing date	Jun 1, 2020
Priority date	Sep 30, 2019
Publication date	Nov 28, 2023
Grant date	Nov 28, 2023

Abstract

Disclosed are a method for controlling a heating water heater, a heating water heater, and a computer-readable storage medium. The method includes: controlling the heating outlet to be closed and the heat supply outlet to be opened after receiving a bath water signal; obtaining a water temperature of a bath outlet; obtaining a duration that the water temperature at the bath outlet is within a preset water temperature range; controlling an opening degree of the heat supply outlet to decrease and an opening degree of the heating outlet to increase when the duration is greater than or equal to a first preset duration, and a heat load of the heating water heater is less than a rated load; and controlling the heat load of the heating water heater to increase, and maintaining the water temperature at the bath outlet within the preset water temperature range.

First claim

What is claimed is:

1. A method for controlling a heating water heater, wherein the heating water heater comprises:
a flow distributor, a heating branch, a heat supply branch and a bath flow path, the flow distributor has a heating outlet connected to the heating branch and a heat supply outlet connected to the heat supply branch, and the bath flow path is configured for heat exchange with the heat supply branch;
the method for controlling the heating water heater comprises:
controlling the heating outlet to be closed and the heat supply outlet to be opened after receiving a bath water signal;
obtaining a water temperature of a bath outlet;
obtaining a duration that the water temperature at the bath outlet is within a preset water temperature range;
controlling an opening degree of the heat supply outlet to decrease and an opening degree of the heating outlet to increase when the duration is greater than or equal to a first preset duration, and a heat load of the heating water heater is less than a rated load; and
controlling the heat load of the heating water heater to increase, and maintaining the water temperature at the bath outlet within the preset water temperature range.

2. The method for controlling the heating water heater of claim 1 , wherein the controlling of the opening degree of the heat supply outlet to decrease and an opening degree of the heating outlet to increase when the duration is greater than or equal to a first preset duration, and a heat load of the heating water heater is less than a rated load comprises:
controlling the flow distributor to adjust successively towards the heating outlet, such that the opening degree of the heat supply outlet decreases successively and the opening degree of the heating outlet increases successively when the duration is greater than or equal to the first preset duration, and the heat load of the heating water heater is less than the rated load;
the controlling of the heat load of the heating water heater to increase, and maintaining the water temperature at the bath outlet within the preset water temperature range comprises:
each time the flow distributor is adjusted towards the heating outlet, controlling the heat load of the heating water heater to increase once, and maintaining the water temperature at the bath outlet within the preset water temperature range; and
stopping to adjust the flow distributor when the heat load of the heating water heater reaches the rated load.

3. The method for controlling the heating water heater of claim 2 , wherein the heating water heater further comprises a motor connected to the flow distributor;
the motor is a synchronous motor, and each time the flow distributor is adjusted towards the heating outlet, a corresponding power-on duration of the synchronous motor is t/n; t is a power-on duration required for the synchronous motor to drive the flow distributor to completely switch between the heating outlet and the heat supply outlet, and n is a constant; or
the motor is a stepping motor, and each time the flow distributor is adjusted towards the heating outlet, a corresponding number of pulses sent to the stepping motor is N/n; N is a number of pulses required for the stepping motor to drive the flow distributor to completely switch between the heating outlet and the heat supply outlet, and n is a constant.

4. The method for controlling the heating water heater of claim 3 , wherein n is greater than or equal to 10 and less than or equal to 20.

5. The method for controlling the heating water heater of claim 2 , wherein after the stopping to adjust the flow distributor when the heat load of the heating water heater reaches the rated load, the method further comprises:
controlling the heat supply outlet to increase a preset opening degree, and the heating outlet to decrease the preset opening degree when the water temperature at the bath outlet is lower than the preset water temperature range, and
adjusting the heat load of the heating water heater and maintaining the water temperature at the bath outlet within the preset water temperature range.

6. The method for controlling the heating water heater of claim 5 , wherein the controlling of the heat supply outlet to increase a preset opening degree, and the heating outlet to decrease the preset opening degree when the water temperature at the bath outlet is lower than the preset water temperature range comprises:
obtaining adjustment times A of the flow distributor towards the heating outlet;
obtaining flow q 1 of the bath flow path when the water temperature of the bath outlet is within the preset water temperature range;
obtaining flow q 2 of the bath flow path when the water temperature at the bath outlet is lower than the preset water temperature range;
calculating the preset opening degree according to A, q 1 and q 2 ; and
controlling the heat supply outlet to increase the preset opening degree, and the heating outlet to decrease the preset opening degree.

7. The method for controlling the heating water heater of claim 6 , wherein the heating water heater further comprises a motor connected to the flow distributor;
the motor is a synchronous motor, and a power-on duration of the synchronous motor corresponding to the preset opening degree is Bt/n; or
the motor is a stepping motor, and a number of pulses sent to the stepping motor corresponding to the preset opening degree is BN/n; and
B is calculated from A, q 1 , and q 2 , and n is a constant.

8. The method for controlling the heating water heater of claim 7 , wherein a relationship between B and A, q 1 and q 2 is:
B =( q 2 − q 1 )( n−A )/ q 1 .

9. The method for controlling the heating water heater of claim 1 , further comprising the following operations:
obtaining an instruction to stop heating;
controlling the heating outlet to be closed, and the heat supply outlet to be fully opened when both the heating outlet and the heat supply outlet are open; and
adjusting the heat load of the heating water heater and maintaining the water temperature at the bath outlet within the preset water temperature range.

10. The method for controlling the heating water heater of claim 9 , wherein the controlling of the heating outlet to be closed, and the heat supply outlet to be fully opened when both the heating outlet and the heat supply outlet are open comprises:
controlling the flow distributor to adjust successively towards the heat supply outlet when both the heating outlet and the heat supply outlet are open, so that the opening degree of the heat supply outlet increases and the opening of the heating outlet decreases successively;
the adjusting of the heat load of the heating water heater and maintaining the water temperature at the bath outlet within the preset water temperature range comprises:
each time the flow distributor is adjusted towards the heating outlet, controlling the heat load of the heating water heater to decrease once, and maintaining the water temperature at the bath outlet within the preset water temperature range; and
stopping to adjust the flow distributor when the heating outlet is closed and the heat supply outlet is fully opened.

11. A heating water heater, wherein the heating water heater comprises a first heat exchanger, a heating branch, a heat supply branch, a bath flow path and a flow distributor, the bath flow path is configured for exchanging heat with the heat supply branch, the flow distributor has a heating outlet connected to the heating branch, a heat supply outlet connected to the heat supply branch, and a water inlet connected to the first heat exchanger;
the heating water heater further comprises a memory, a processo

Assignees

• Wuhu Midea Kitchen & Bath Appliances Mfg Co Ltd
• Midea Group Co Ltd

Inventors

• Ma Zhihao
• Liang Guorong
• Ni Shuangyue
• Zhang Yongming
• Kang Daoyuan
• Huang Chaohui

Classifications

• F24D19/1069 Primary

  regulation in function of the temperature of the domestic hot water · CPC title

• F24D19/1051

  for domestic hot water · CPC title

• F24H9/2007

  for water heaters · CPC title

• F24D3/08 Primary

  in combination with systems for domestic hot-water supply · CPC title

• F24H1/52

  incorporating heat exchangers for domestic water (F24H1/50 takes precedence) · CPC title