CN113623873A

CN113623873A - Hybrid energy heating control method

Info

Publication number: CN113623873A
Application number: CN202110738049.7A
Authority: CN
Inventors: 刘鹏; 张伟; 韩天雷; 许巧丽
Original assignee: Chongqing Haier Water Heater Co Ltd; Haier Smart Home Co Ltd; Qingdao Economic and Technological Development Zone Haier Water Heater Co Ltd
Current assignee: Chongqing Haier Water Heater Co Ltd; Haier Smart Home Co Ltd; Qingdao Economic and Technological Development Zone Haier Water Heater Co Ltd
Priority date: 2021-06-30
Filing date: 2021-06-30
Publication date: 2021-11-09

Abstract

The invention provides a hybrid energy heating control method, which comprises the following steps: detecting the water using state; when the starting water is detected, detecting a set temperature Tse, and selecting a heating mode according to the set temperature Tse, wherein the heating mode comprises any combination of gas heating, electric heating and auxiliary heat exchanger module heating. The hybrid energy heating control method of the invention provides great convenience for users by detecting the water using state and automatically selecting and switching the heating mode according to the water using state and the set temperature.

Description

Hybrid energy heating control method

Technical Field

The invention belongs to the technical field of water heating devices, and particularly relates to a hybrid energy heating control method with multiple heating modes.

Background

The heating control of the existing water heater is generally a gas combustion and electric heating mode, and the control mode is single compared with the traditional control mode. The temperature control mode of the water heater can only be realized by adjusting the gas quantity or the electric heating power, and the control precision is poor. In the aspect of noise of the water heater, the noise problem of the gas water heater always exists.

Some water heaters adopt mixed energy sources for heating, for example, a gas heating part and an electric heating part are simultaneously arranged in a gas water heater. When a plurality of heating modes are available, for example, the gas heating and electric heating switching logic is manually realized through keys on the display panel, and the switching logic can be the switching between gas heating and electric heating; or defaulting a heating mode (gas), starting timing after each key switching, and switching back to the default heating mode after a certain time.

Disclosure of Invention

The invention provides a hybrid energy heating control method with multiple heating modes, which aims to solve the technical problem that the heating modes of a water heater with multiple heating modes in the prior art are switched manually through keys on a display panel, so that inconvenience is brought to use.

In order to realize the purpose of the invention, the invention is realized by adopting the following technical scheme:

a hybrid energy heating control method comprises the following steps:

detecting the water using state;

when the starting water is detected, detecting a set temperature Tse, and selecting a heating mode according to the set temperature Tse, wherein the heating mode comprises any combination of gas heating, electric heating and auxiliary heat exchanger module heating.

Further, when Tse is larger than T1, gas heating is started;

when Tse is more than T2 and less than or equal to T1, starting gas heating and auxiliary heat exchanger module heating;

when Tj is more than Tse and is less than or equal to T2, starting electric heating;

wherein Tj is the water inlet temperature, and T1 is more than T2 is more than 0.

Further, before starting the gas heating, the method also comprises the following steps of judging the ignition condition:

and detecting the water flow passing through the gas water heater, and igniting to start gas heating when the water flow is not less than the set flow L1.

Further, when gas heating is started, the method comprises the following fire row control methods:

the fire grate comprises a plurality of sections according to the fire power;

and determining the fire grate needing to control combustion according to the temperature difference between the set temperature Tse and the inlet water temperature Tj and the temperature difference between the outlet water temperature Tc and the inlet water temperature Tj.

Further, the fire grate at least comprises a section A, a section B, a section C and a section D in sequence from small to large according to the firepower;

when Tse-Tj is larger than T3, the temperature difference between the inlet water temperature Tj and the outlet water temperature Tc is continuously judged:

when Tc-Tj is more than T4, controlling D-stage fire row to burn;

when Tc-Tj is less than or equal to T4, controlling the combustion of the C-section fire row;

and when Tse-Tj is less than or equal to T3, controlling the combustion of the B-section fire row.

Further, the fire grate control method also comprises the step of judging the temperature difference between the set temperature Tse and the effluent temperature Tc, and when the Tse-Tc is larger than or equal to T5, controlling the fire grate which is currently burnt to be flamed out and igniting the fire grate at the section A.

Further, according to the temperature difference control of the set temperature Tse and the effluent temperature Tc, the auxiliary heat exchanger module heating power includes:

when Tse-Tc is larger than or equal to T5, if Td1 is smaller than Td2, controlling the auxiliary heat exchanger module to work according to rated power P, otherwise, controlling the auxiliary heat exchanger module to work according to rated power a1 times;

when T6 is not more than Tse-Tc is less than T5, if Td1 is less than Td2, controlling the auxiliary heat exchanger module to work according to a2 times of rated power, otherwise, controlling the auxiliary heat exchanger module to work according to a3 times of rated power;

when Tse-Tc is less than T7, controlling the auxiliary heat exchanger module to work according to a rated power which is 4 times, and simultaneously closing gas heating;

wherein Td1 is the temperature of the refrigerant in the auxiliary heat exchanger module, Td2 is the outlet water temperature of the auxiliary heat exchanger module, T5 > T6 > T7 > 0;

0＜a4＜a3＜a2＜a1＜100%。

further, when Tse-Tc is less than T7, the method further includes a step of starting an auxiliary heat constant temperature control, where the auxiliary heat constant temperature control step is to control the heating power of the auxiliary heat exchanger module according to the temperature difference between the set temperature Tse and the effluent temperature Tc, and the larger the temperature difference between the set temperature Tse and the effluent temperature Tc is, the larger the heating power of the auxiliary heat exchanger module is, and the maximum power of the auxiliary heat exchanger module is not more than the rated power of the auxiliary heat exchanger module.

Further, when Tse-Tc < T7, keeping the current working state unchanged;

when Tse-Tc is more than T8, controlling the auxiliary heat exchanger module to increase the power to a5 times of rated power;

when Tse-Tc is more than T9, controlling the auxiliary heat exchanger module to increase the power to a6 times of rated power;

when Tse-Tc is more than T10, controlling the auxiliary heat exchanger module to increase the power to a7 times of rated power;

when Tse-Tc is larger than T11, controlling the auxiliary heat exchanger module to increase the power to the rated power;

wherein T7 < T8 < T9 < T10 < T11;

a4＜a5＜a6＜a7＜100%。

further, when the electric heating is started, the heating power of the electric heating is controlled according to the temperature difference between the set temperature Tse and the water inlet temperature Tj, and the larger the temperature difference between the set temperature Tse and the water inlet temperature Tj is, the larger the heating power of the electric heating is, and the maximum power does not exceed the rated power of the electric heating module.

Further, in the electric heating process, when Tse-Tc is less than T7, the method also comprises the step of starting electric heating constant temperature control; the larger the temperature difference between the set temperature Tse and the outlet water temperature Tc is, the larger the heating power of the electric heating module is, and the maximum temperature does not exceed the rated power of the electric heating module.

Compared with the prior art, the invention has the advantages and positive effects that: according to the hybrid energy heating control method, the water using state is detected, the heating mode is automatically selected and switched according to the water using state and the set temperature, manual setting and selection are not needed, and great convenience is brought to a user.

Other features and advantages of the present invention will become more apparent from the following detailed description of the invention when taken in conjunction with the accompanying drawings.

Drawings

In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings needed to be used in the embodiments are briefly introduced below, and it is obvious that the drawings in the following description are some embodiments of the present invention, and it is obvious for those skilled in the art to obtain other drawings based on these drawings without creative efforts.

Fig. 1 is a flowchart of an embodiment of a hybrid energy heating control method according to the present invention;

fig. 2 is a flow chart of an embodiment of the hybrid energy water heater of the present invention.

Detailed Description

In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are some, but not all, embodiments of the present invention. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

It should be noted that in the description of the present invention, the terms of direction or positional relationship indicated by the terms "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc. are based on the directions or positional relationships shown in the drawings, which are merely for convenience of description, and do not indicate or imply that the device or element must have a specific orientation, be constructed and operated in a specific orientation, and thus, should not be construed as limiting the present invention. Furthermore, the terms "first" and "second" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.

Example one

The embodiment provides a hybrid energy heating control method, as shown in fig. 1, including the following steps:

detecting the water using state;

when the starting water is detected, the set temperature Tse is detected, and a heating mode is selected according to the set temperature Tse, wherein the heating mode comprises any combination of gas heating, electric heating and auxiliary heat exchanger module heating.

The detection water state is also whether the detection water terminal is opened for water use, the detection mode has a plurality of modes, for example, a mode of detecting the water flow flowing through the water heater can be adopted, when any water consumption point is opened for water use (the opening water in the embodiment means that the water consumption point has a hot water demand, if the water consumption point is only opened for cold water, the water consumption condition of the embodiment is not existed, because the water flow does not pass through the water heater when the cold water is opened only), the water flow flows through the water heater, and the water consumption state can be judged by detecting the water flow flowing through the water heater.

The water consumption state can be detected, the opening state of each water consumption point can be detected, and the opening state of each water consumption point is sent to the water heater in a wired communication or wireless communication mode.

The set temperature Tse is set by the user through the control panel, and is a default value when not set by the user.

When the water consumption point is available, the control module of the water heater automatically selects and switches a proper heating mode according to the set temperature Tse, and the heating mode is matched with the set temperature Tse.

Specifically, the gas heating, the electric heating and the auxiliary heat exchanger module heating have different corresponding heating principles according to different energy sources, and have respective characteristics, for example, the gas heating generally has the technical problem of slow temperature rise, but the gas heating has high efficiency, and can continuously output high-flow high-temperature water. Like electric heating, the temperature rise is fast, hot water is fast to go out, but the heating efficiency is low, and large-flow high-temperature water cannot be continuously output. Therefore, the hybrid energy heating control method of the embodiment brings great convenience to users by detecting the water use state and automatically selecting and switching the heating mode according to the water use state and the set temperature.

The water heater of this embodiment integrates the electrical heating module and assists the heat exchanger module on traditional water heater structure basis, and the electrical heating module contains water pitcher and electrical heating module, assists the heat exchanger module to contain and assists heat exchanger and coil pipe and compressor module. The heating principle of the auxiliary heat exchanger module is that the refrigerant in the refrigerant pipeline is driven by the compressor to circulate, and the refrigerant absorbs heat from the outside and is transferred to the water heater to release heat for heating water.

The inside basic water route of water heater circulates, and user's running water inserts the water heater through connecting the inlet tube, loops through water pump, transfer the water valve and flows into inside copper pipe way.

In this embodiment, the electric heating module, the auxiliary heat exchanger module, and the gas heating module may be arbitrarily arranged as required according to the arrangement order of the water flow direction. In this embodiment, a gas heating module, an auxiliary heat exchanger module, and an electric heating module are arranged in this order in the water flow direction.

The water inflow from the water pipe sequentially passes through the heat exchange tubes of the gas heating module, then flows through the heat exchange coil of the auxiliary heat exchanger module, then enters the water tank of the electric heating module, is provided with the electric heating module in the water tank, and finally flows out through the water outlet pipe.

The basic gas circuit in the water heater is consistent with that of the traditional gas water heater, the gas passes through the gas inlet connector, passes through the proportional valve and the distributor to the combustion module, then is ignited and combusted by the ignition needle, and the gas generated by combustion is exhausted by the direct current fan and collected by the smoke collecting cover and is discharged to the outside through the flue.

As a preferred embodiment, the method for selecting the heating mode according to the set temperature Tse in this embodiment is as follows:

when Tse is more than T1, starting gas heating;

T1 may be a higher temperature, such as but not limited to 50 ℃ for T1, when the set temperature Tse > T1, it means that the water temperature demand is higher, and therefore, it is necessary to turn on the gas heating module with high heating efficiency for heating.

And when the Tse is more than T2 and less than or equal to T1, the gas heating module and the auxiliary heat exchanger module are started to heat at the same time.

At the moment, the fire row number and the opening degree of a proportional valve of the gas heating module can be mainly adjusted according to the set temperature Tse, the water inlet temperature Tj, the water outlet temperature Tc, the first anti-freezing temperature Td1 and the second anti-freezing temperature Td2, and the output power of the auxiliary heat exchanger module is finely adjusted at the same time, so that the outlet water temperature is controlled in a constant temperature mode.

The first antifreeze temperature Td1 is the temperature of the refrigerant in the auxiliary heat exchanger module, the second antifreeze temperature Td2 is the outlet water temperature of the auxiliary heat exchanger module, and the first antifreeze temperature Td1 and the second antifreeze temperature Td2 are respectively measured by temperature sensors.

In order to prevent the situation that the water flow is small although the water flow is detected due to the reasons of the water consumption point not being closed tightly or the water pressure fluctuation of a pipe network, and the like, and avoid heating by mistake, in this embodiment, it is preferable that before starting the gas heating, the method further includes a step of judging an ignition condition, and the method includes:

and detecting the water flow passing through the water heater, and igniting to start gas heating when the water flow is not less than the set flow L1. Otherwise, the ignition heating step is not executed to ensure the safe hot water production.

In addition, in the gas heating module burning heating process, still judge including the condition of stopping burning: for example, when the front section a fire is burning, and when the leaving water temperature is greater than 52 ℃, the combustion can be turned off.

In the user water use process, the mixed heating control and temperature control functions are started, the user water use requirement is met to the greatest extent, and the use experience of rapid heating and constant-temperature water flow is realized.

When gas heating is started, the method comprises the following steps:

the fire grate comprises a plurality of sections according to the fire power;

As a preferred embodiment, in this embodiment, the fire grate includes at least a segment a, a segment B, a segment C, and a segment D in order from small to large.

when Tc-Tj is more than T4, controlling D-stage fire row to burn;

Wherein T3 is more than T4 is more than 0.

T3 may take on values but not limited to 30 ℃ and T4 may take on values but not limited to 5 ℃.

The scheme can select the fire grate with corresponding capability for combustion according to the difference value between the water inlet temperature Tj and the set temperature Tse and the difference value between the water outlet temperature Tc and the water inlet temperature Tj, and the fire grate with larger fire power is selected for combustion when the two difference values are larger, so that enough heat is provided to quickly heat the water to be close to the set temperature.

The fire grate control method further comprises the step of judging the temperature difference between the set temperature Tse and the effluent temperature Tc, and when Tse-Tc is smaller than T5, controlling to extinguish the fire grate which is currently burning and igniting the fire grate at the section A. T5 may take on values but is not limited to 10 ℃.

In order to improve the heating precision and make the outlet water temperature approach the set temperature as much as possible, the present embodiment further includes controlling the heating power of the auxiliary heat exchanger module according to the temperature difference between the set temperature Tse and the outlet water temperature Tc, so that the outlet water temperature slowly approaches the set temperature, and the temperature rise is prevented from being too large, so that the precision is not easily controlled, and is easily too high or too low. In order to solve the above problem, in the embodiment, the smaller the temperature difference between the set temperature Tse and the outlet water temperature Tc, the smaller the output power of the auxiliary heat exchanger module is adjusted.

As a preferred embodiment, comprising:

when Tse-Tc is less than T7, controlling the auxiliary heat exchanger module to work according to a4 times rated power, and simultaneously closing gas heating;

wherein T5 > T6 > T7 > 0;

0＜a4＜a3＜a2＜a1＜100%。

when Tse-Tc is less than T7, the method further comprises an auxiliary heat constant temperature control step, wherein the auxiliary heat constant temperature control step is used for controlling the heating power of the auxiliary heat exchanger module according to the temperature difference between the set temperature Tse and the effluent temperature Tc, the larger the temperature difference between the set temperature Tse and the effluent temperature Tc is, the larger the heating power of the auxiliary heat exchanger module is, and the maximum rated power of the auxiliary heat exchanger module is not exceeded.

T7 can be selected but not limited to 1 ℃, when Tse-Tc is less than T7, the water outlet temperature is particularly close to the set temperature, and the gas heating module is controlled to stop burning. Because the auxiliary heat constant temperature control has the advantage of high temperature control precision, the auxiliary heat exchanger module is adopted to carry out the auxiliary heat constant temperature control at the moment.

The method for performing auxiliary heat constant temperature control by adopting the auxiliary heat exchanger module comprises the following steps:

when Tse-Tc is more than T8, the auxiliary heat exchanger module is controlled to increase the power to a5 times of rated power;

when Tse-Tc is more than T9, the auxiliary heat exchanger module is controlled to increase the power to a6 times of rated power;

when Tse-Tc is more than T10, the auxiliary heat exchanger module is controlled to increase the power to a7 times of rated power;

when Tse-Tc is larger than T11, the auxiliary heat exchanger module is controlled to increase the power to the rated power;

wherein T7 < T8 < T9 < T10 < T11;

a4＜a5＜a6＜a7＜100%。

when Tse-Tc > T11, it indicates that the difference between the outlet water temperature and the set temperature is large, and at this time, if the water flow is large, the energy consumption required for heating to the set temperature is large, the period is long, and the short time cannot be reached, so the embodiment is implemented by reducing the water flow. The water flow is reduced, and under the condition that energy consumption supply is not changed, the water flow temperature can be quickly increased to the target heating temperature, so that the waiting time of a user is reduced.

When the electric heating is started, the heating power of the electric heating is controlled according to the temperature difference between the set temperature Tse and the water inlet temperature Tj, and the larger the temperature difference between the set temperature Tse and the water inlet temperature Tj is, the larger the heating power of the electric heating is, and the maximum rated power of the electric heating module is not exceeded.

For example, when Tse-Tj is more than 30 ℃, the water tank electric heating module works according to 100 percent of rated power.

When Tse-Tj is more than 20 ℃, the electric heating module works according to 70 percent of rated power.

When Tse-Tj is more than 10 ℃, the electric heating module works according to 50 percent of rated power.

When the Tse-Tj is more than 5 ℃, the water outlet temperature T2 is judged, and when the Tse-Tc is more than 0 ℃, the electric heating module works according to 30 percent of rated power.

When Tse-Tc is less than 1 ℃, the water tank electric heating module works according to 10% of rated power, and the constant temperature control logic of the water tank is started to maintain the constant temperature requirement of the outlet water temperature of a user.

In the process of electric heating, when Tse-Tc is less than T7, the method also comprises the step of starting electric heating constant temperature control; the larger the temperature difference between the set temperature Tse and the effluent temperature Tc is, the larger the heating power of the electric heating module is, and the maximum temperature does not exceed the rated power of the electric heating module.

For example, when Tse-Tc > 2 ℃, the electrical heating module operates at 30% of rated power.

When Tse-Tc is more than 4 ℃, the electric heating module works according to 50 percent of rated power.

When Tse-Tc is more than 6 ℃, the electric heating module works according to 70 percent of rated power.

When Tse-Tc is more than 10 ℃, the electric heating module works according to 100 percent of rated power.

When Tse-Tc is less than 1 ℃, the electric heating module works according to 10 percent of rated power, and the electric heating constant temperature control logic continuously circulates.

When the water heater is in a standby state, namely when no water is used, the water heater also comprises a step of anti-freezing protection, so as to prevent the water in the water pipe from being frozen due to the low ambient temperature and solve the technical problem that the water heater cannot be used.

The anti-freeze control logic in this embodiment includes:

when Tj is less than 0 ℃, the antifreezing function is started.

And if the Td1 and the Td2 are both more than 0 ℃, starting the water pump, and stopping after running for 5 min. At the moment, the temperature in the water pipe is not particularly low, and the antifreezing effect can be realized only by circulating the water in the water pipe.

If Td1 or Td2 is less than 0 ℃, the auxiliary heat exchanger module operates, and when Td1 and Td2 are both greater than 10 degrees, the auxiliary heat exchanger module stops operating.

If Td1 or Td2 is less than 0 ℃ and Tc is less than 0 ℃, the proportional valve is opened to ignite and burn, and when Tc is more than 20 ℃, the burning is stopped. At the moment, the water temperature in the water pipe is lower, and the gas heating module is started to rapidly heat.

When the water heater is in a standby state, namely when no water is used, the method of the embodiment further comprises a preheating step, and water in the water pipe is preheated in the time of no water use, so that hot water can be quickly discharged when a user uses water, and the waiting time of the user is saved.

The preheating step comprises: when Tj is more than 0 and less than 10 ℃, the preheating function is started, the electric heating module works, and when Tc is more than 20 ℃, the electric heating module stops working, so that the preheating function is completed.

The method of the embodiment also comprises a quick heating step, and when the temperature is more than 10 and less than Tj and less than 20 ℃, the quick heating function for water consumption of the user is started. The method specifically comprises the following steps:

if Tse-Tj is more than 30 ℃, the auxiliary heat exchanger module works, and when Tc is more than 25 ℃, the auxiliary heat exchanger module stops working.

If Tse-Tj is less than 30 ℃, the machine keeps a standby state.

When Tj > 20 ℃, the machine remains in a standby state.

The fast warm mode may further reduce the user waiting time for water usage.

Example two

The embodiment provides a hybrid energy water heater, as shown in fig. 2, including a burner 11, a heat exchanger 12, a water inlet pipe 13, a water outlet pipe 14, and a control device 15, where the heat exchanger 12 includes a heat collecting cover 121 and a heat exchange pipe 122 coiled on the heat collecting cover 121, and further includes an auxiliary heating module, where the auxiliary heating module includes an auxiliary heat collecting cover 161, a heat exchange coil 162, and an external circulation system (not shown in the figure), and the external circulation system includes an evaporator, a compressor, and a valve connected in a refrigerant pipeline. The compressor may drive a refrigerant to circulate between the evaporator and the heat exchanging coil 162, where the refrigerant carries heat to be discharged for heating in the heat exchanging coil 162.

The auxiliary heat collecting cover 161 is connected with the heat collecting cover 121, and a cavity communicated with the heat collecting cover 121 is defined inside the auxiliary heat collecting cover 161; the heat exchange coil 162 is disposed in the cavity of the auxiliary heat collecting cover 161, and two ends of the heat exchange coil extend out of the outer side of the auxiliary heat collecting cover 161 to connect with the refrigerant pipe. The evaporator is connected with the refrigerant pipe, and the compressor is connected between the heat exchange coil and the evaporator. Therefore, the refrigerant can absorb heat in the evaporator under the driving of the compressor, and release heat when circulating to the heat exchange coil 162 through the refrigerant pipe, so as to produce hot water.

The hybrid energy water heater of the present solution can perform control according to the control logic described in the first embodiment.

The auxiliary heat exchange tube 163 is disposed in the cavity of the auxiliary heat collecting cover 161, two ends of the auxiliary heat exchange tube 163 extend out of the auxiliary heat collecting cover 161, and one end of the auxiliary heat exchange tube 163 is connected to the heat exchange tube. The secondary heat exchange tube 163 and heat exchange tube 12 are for receiving water flow therethrough. Wherein the auxiliary heat exchange tube 163 may be disposed upstream and the heat exchange tube 12 disposed downstream, or the heat exchange tube 12 may be disposed upstream and the auxiliary heat exchange tube 163 disposed downstream, in terms of the water flow direction. In the present embodiment, the heat exchange tube 12 is disposed upstream, and the auxiliary heat exchange tube 163 is disposed downstream.

When the burner 11 is turned on, heat generated by combustion is collected in the heat collecting cap 121, and the heat exchanging pipes 122 are coiled on the heat collecting cap 121, so that cold water introduced from the water inlet pipe 13 absorbs heat while passing through the heat exchanging pipes 12, and the temperature rises.

When the auxiliary heating module is turned on to heat, the refrigerant circulates to the heat exchange coil 162 to release heat to the auxiliary heat collecting cover 161, and the auxiliary heat exchange tube 163 is disposed in the auxiliary heat collecting cover 161, so that the cold water entering from the water inlet tube 13 flows through the heat exchange tube 12 and then enters the auxiliary heat exchange tube 163, and the heat released by the heat exchange coil 162 is absorbed in the auxiliary heat exchange tube 163, and the temperature is increased.

The control device 15 controls the operating state of the auxiliary heating module and the burner according to the water usage state, i.e. whether the auxiliary heating module is switched on or off and the burner 11 is switched on or off according to whether the water usage is switched on.

The water consumption state is also used for detecting whether the water consumption terminal is started to use water, the detection modes are various, for example, a mode of detecting the water flow flowing through the water heater can be adopted, when any water consumption point is started to use water (the water consumption point has hot water requirement in the embodiment, if the water consumption point is only started to use cold water, the water consumption condition does not belong to the embodiment, because the water flow does not pass through the water heater when the cold water is started only by single opening), the water flow flows through the water heater, and the water consumption state can be judged by detecting the water flow flowing through the water heater.

In this embodiment, it is preferable that the auxiliary heat collecting cover 161 is disposed above the heat collecting cover 121, and one end of the heat exchanging pipe 122 is connected to the water inlet pipe 13 and the other end is connected to the auxiliary heat exchanging pipe 163.

In this embodiment, the auxiliary heating module and the heat exchanger 12 can be independently started for heating respectively, or simultaneously started for heating.

The auxiliary heat collecting hood 161 is arranged above the heat collecting hood 121, the heat collecting hood 121 is arranged above the combustor 11, the smoke collecting hood 18 is connected above the auxiliary heat collecting hood 161, smoke generated by combustion of the combustor 11 sequentially enters the smoke collecting hood 18 through the heat collecting hood 121 and the auxiliary heat collecting hood 161, and is discharged to the outside through a smoke discharge pipe (not shown in the figure) connected with the smoke collecting hood 18.

The auxiliary heating module achieves the purpose of heating through a circulating refrigerant, and the heating mode has the advantage of accurate temperature control. When the ambient temperature receives the interference hour, can accurate control heating temperature, in order to reduce the influence that gets into from the thermal-arrest cover 121 and have thermal flue gas to assisting the temperature in the thermal-arrest cover 161, in order to improve the temperature control precision of auxiliary heating module, be provided with insulating layer 17 between this implementation assistance thermal-arrest cover 161 and the thermal-arrest cover 121, set up the through-hole (not shown in the angle reason figure) that is used for communicateing assistance thermal-arrest cover 161 and thermal-arrest cover 121 on the insulating layer 17, insulating layer 17 is arranged in the thermal-arrest cover 161 of assistance transmission of separation heat top, reduce the interference to the temperature in the assistance thermal-arrest cover 161, and then can improve the temperature control precision of auxiliary heating module.

The through holes of the heat collecting cover 121 are used for allowing flue gas generated by combustion to pass through.

To further increase the energy source type of the present water heater, it is preferred that the hybrid energy water heater further comprises an electric heating module 19, which electrically heats the water flowing through using the principle of electric heating.

In the embodiment, the electric heating module 19 is preferably disposed downstream of the heat exchange tube 122 and the auxiliary heating module, and when the water flowing into the electric heating module 19 does not reach the target heating temperature, the electric heating module 19 may heat the inlet water to reach the target heating temperature.

In this embodiment, it is preferable that the electric heating module 19 is disposed downstream of the auxiliary heating module, one end of the electric heating module is connected to the water outlet end of the auxiliary heating module, and the other end of the electric heating module is connected to the water outlet pipe.

When using in winter, because ambient temperature is low, make the water in the water pipe freeze easily, lead to the water heater unable to use, the hybrid energy water heater in this implementation still includes the module of preventing frostbite.

The anti-freezing module comprises a first temperature detection element 20 for detecting the temperature Td1 of the refrigerant in the auxiliary heat exchanger module and a second temperature detection element 21 for detecting the water outlet temperature Td2 of the auxiliary heating module, and the control device 15 controls and executes anti-freezing logic according to the detection result.

The water inlet pipe 12 or the water outlet pipe 13 is connected with a water pump 22, and the hybrid energy water heater further comprises a circulating pipe for connecting the water inlet pipe 12 with the water outlet pipe 13. The anti-freeze logic in this embodiment may be executed according to the scheme described in the first embodiment, and is not described herein again.

The above examples are only intended to illustrate the technical solution of the present invention, but not to limit it; although the present invention has been described in detail with reference to the foregoing embodiments, it will be apparent to those skilled in the art that various changes may be made and equivalents may be substituted for elements thereof; and such modifications or substitutions do not depart from the spirit and scope of the corresponding technical solutions.

Claims

1. A hybrid energy heating control method is characterized by comprising the following steps:

detecting the water using state;

2. The hybrid energy heating control method according to claim 1,

when Tse is more than T1, starting gas heating;

3. The hybrid energy heating control method according to claim 2, further comprising, before starting the gas heating, a step of judging an ignition condition:

and detecting the water flow passing through the water heater, and igniting to start gas heating when the water flow is not less than the set flow L1.

4. The hybrid energy heating control method according to claim 2, comprising, when gas heating is started, a fire grate control method of:

the fire grate comprises a plurality of sections according to the fire power;

5. The hybrid energy heating control method according to claim 4,

the fire grate at least comprises an A section, a B section, a C section and a D section in sequence from small to large according to the firepower;

when Tc-Tj is more than T4, controlling D-stage fire row to burn;

6. The hybrid energy heating control method according to claim 5, wherein the fire grate control method further comprises the step of judging the temperature difference between the set temperature Tse and the effluent temperature Tc, and when Tse-Tc is larger than or equal to T5, controlling to extinguish the fire grate currently burning and ignite the fire grate at the section A.

7. The hybrid energy heating control method according to claim 6, wherein the controlling of the heating power of the auxiliary heat exchanger module according to the temperature difference between the set temperature Tse and the outlet water temperature Tc comprises:

0＜a4＜a3＜a2＜a1＜100%。

8. the hybrid energy heating control method according to claim 7, further comprising a step of starting an auxiliary heat constant temperature control when Tse-Tc < T7, wherein the auxiliary heat constant temperature control step is to control the heating power of the auxiliary heat exchanger module according to the temperature difference between the set temperature Tse and the effluent temperature Tc, and the larger the temperature difference between the set temperature Tse and the effluent temperature Tc is, the larger the heating power of the auxiliary heat exchanger module is, and the maximum power of the auxiliary heat exchanger module is not more than the rated power of the auxiliary heat exchanger module.

9. The hybrid energy heating control method according to claim 8,

when Tse-Tc < T7, keeping the current working state unchanged;

wherein T7 < T8 < T9 < T10 < T11;

a4＜a5＜a6＜a7＜100%。

10. the hybrid energy heating control method according to claim 2, wherein when the electric heating is started, the heating power of the electric heating is controlled according to the temperature difference between the set temperature Tse and the water inlet temperature Tj, and the larger the temperature difference between the set temperature Tse and the water inlet temperature Tj is, the larger the heating power of the electric heating is, and the maximum power does not exceed the rated power of the electric heating module.

11. The hybrid energy heating control method according to claim 10,

in the process of electric heating, when Tse-Tc is less than T7, the method also comprises the step of starting electric heating constant temperature control; the larger the temperature difference between the set temperature Tse and the outlet water temperature Tc is, the larger the heating power of the electric heating module is, and the maximum temperature does not exceed the rated power of the electric heating module.