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Constant temperature control method and device for water heater and water heater

A constant temperature control and water temperature control technology, applied in the field of water heater heating control, water heater constant temperature control, can solve the problems of poor constant temperature effect, slow response speed of water temperature changes, etc., to improve response speed, improve stability and robustness, and solve water temperature problems. The effect of slow response to changes

Pending Publication Date: 2021-10-22
QINGDAO ECONOMIC & TECHN DEV ZONE HAIER WATER HEATER +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The invention provides a water heater constant temperature control method, which solves the problems of slow response speed and poor constant temperature effect of the existing constant temperature control algorithm to water temperature changes, and is conducive to increasing the adjustment response speed and improving the constant temperature effect

Method used

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  • Constant temperature control method and device for water heater and water heater
  • Constant temperature control method and device for water heater and water heater
  • Constant temperature control method and device for water heater and water heater

Examples

Experimental program
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Effect test

Embodiment 1

[0038] figure 1 It is a flow chart of a water heater constant temperature control method provided in Embodiment 1 of the present invention. This embodiment is applicable to the application scenario of constant temperature control of the outlet water temperature of an instant water heater. The method can be configured by a PID with a specific functional module control system to perform.

[0039] Such as figure 1 As shown, the water heater constant temperature control method specifically includes the following steps:

[0040] Step S1: Obtain the operating parameters of the water heater, including but not limited to: set temperature, water inlet temperature, water outlet temperature, water flow parameters and voltage parameters.

[0041] Optionally, the temperature sensor can be used to collect the water inlet temperature and the water outlet temperature of the water heater in real time, the water flow sensor can be used to collect the water flow of the water heater in real tim...

Embodiment 2

[0083] image 3 It is a flow chart of a water heater constant temperature control method provided by Embodiment 2 of the present invention. On the basis of the above embodiments, this embodiment performs secondary optimization through fuzzy control in the calculation process of PID control.

[0084] Optionally, as in image 3 As shown, the water heater constant temperature control method also includes the following steps:

[0085] Step S510: Determine the power control fuzzy value according to the set temperature, outlet water temperature and water flow parameters.

[0086] Step S520: Correct the power control output value according to the power control fuzzy value to obtain a power control corrected output value.

[0087] Step S530: Use the power control correction output value to replace the power control output value, determine the target power value with the real-time theoretical power value, and continue to execute step S7.

[0088]In this embodiment, the power control...

Embodiment 3

[0100] Figure 4 It is a flow chart of a constant temperature control method for water heaters provided by Embodiment 3 of the present invention. Based on the above embodiments, this embodiment adopts limiter control measurement to avoid excessive calculated values ​​of the algorithm and control the heating power within a reasonable and stable range. , improve system stability.

[0101] Optionally, as in Figure 4 As shown, the water heater constant temperature control method also includes the following steps:

[0102] Step S401: Obtain a preset single-step limit value.

[0103] Step S402: Determine whether the target power value exceeds a preset single-step limit value.

[0104] If the target power value exceeds the preset single-step limit value, execute step S403; otherwise, return to execute step S402.

[0105] Step S403: Using the preset single-step limit value instead of the target power value, driving the heating module to perform heating.

[0106] Specifically, th...

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Abstract

The invention discloses a constant temperature control method and device for a water heater and the water heater. The method comprises the steps of obtaining operation parameters of the water heater; determining a real-time power theoretical value at the sampling moment according to the operation parameters; establishing a water temperature control mathematical model based on an energy conservation principle; determining a position type PID control model and a lag compensation model according to water flow parameters and the water temperature control mathematical model; processing a temperature difference value between the set temperature and the outlet water temperature based on the position type PID control model and the lag compensation model, and obtaining a power control output value; determining a target power value according to the power control output value and the real-time power theoretical value; and driving a heating module to execute heating according to the target power value. According to the method, through establishment of the water temperature control mathematical model, the PID control model and the lag compensation model are obtained through derivation, the heating target power value is obtained by combining the PID control model and the lag compensation model with the real-time power theoretical value, the stability and robustness of the outlet water temperature are improved, and the response time is shortened.

Description

technical field [0001] The invention relates to the technical field of water heater heating control, in particular to a water heater constant temperature control method, device and water heater. Background technique [0002] An instant water heater is a device that rapidly heats flowing water through an electronic heating device. The instant water heater has the advantages of maintaining a constant temperature of the outlet water and fast heating speed, and is widely used in daily washing, bathing and other scenarios. [0003] The key to affecting the water outlet performance of instant water heaters is the constant temperature calculation. After the temperature difference between the water outlet temperature and the set temperature occurs, use the constant temperature algorithm to correct the temperature difference and ensure that the correction effect can continue. [0004] The existing water heater constant temperature algorithm usually directly adopts logic calculation o...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F24H1/00F24H9/20
CPCF24H1/0018F24H9/2014
Inventor 李迅陈小雷李伟民吴玉文张清华谢堂健
Owner QINGDAO ECONOMIC & TECHN DEV ZONE HAIER WATER HEATER
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