CN104633945A - Method and system for controlling gas water heater and gas water heater - Google Patents
Method and system for controlling gas water heater and gas water heater Download PDFInfo
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- CN104633945A CN104633945A CN201510052011.9A CN201510052011A CN104633945A CN 104633945 A CN104633945 A CN 104633945A CN 201510052011 A CN201510052011 A CN 201510052011A CN 104633945 A CN104633945 A CN 104633945A
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Abstract
The invention provides a method for controlling a gas water heater. The method includes the following steps: detecting the temperature of inlet water according to a signal for selecting the zero cold water function; carrying out comparison to judge whether the temperature of returned water is lower than first temperature or not, if the temperature of the returned water is lower than the first temperature, carrying out controlling to start a zero cold water mode to control the gas water heater to carry out preheating, and if the temperature of the returned water is not lower than the first temperature, maintaining the current state, wherein the first temperature is the difference obtained by subtracting a first preset threshold value from set temperature; carrying out comparison to judge whether the temperature of the returned water is higher than or equal to second temperature or not, if the temperature of the returned water is higher than or equal to the second temperature, stopping the zero cold water mode, and on the contrary, maintaining the current state, wherein the second temperature is the difference obtained by subtracting a second preset threshold value from the set temperature. The control method is high in accuracy and good in user experience. The invention further provides a system for controlling the gas water heater and the gas water heater.
Description
Technical field
The present invention relates to household electrical appliance technical field, particularly relate to a kind of control method and system, gas heater of gas heater.
Background technology
Zero cold water gas heater refers to the built-in water circulating pump of gas heater, when opening " zero cold water " function of gas heater, water circulating pump is started working, being twitched by the circulating chilled water installed in water pipe goes burner to heat, until reach set temperature, gondola water faucet is flowed out once having opened hot water.
Existing zero cold water gas heater commonly uses the startup of " zero cold water " function and cut out condition and is defined as follows at present: zero cold water function on condition: T (returning)≤T (establishing), zero cold water function closes condition: T (returning) >T (establishing), wherein T (returning) is the return water temperature of the water being drawn back gas heater by water circulating pump, and T (setting) is as the set temperature of gas heater water outlet.But it is short that water loop pipeline has length to have, the oversize thermal loss of pipeline is large, and the water of the output of gas heater may not reach design temperature.
Summary of the invention
The present invention is intended to solve one of technical problem in correlation technique at least to a certain extent.For this reason, the object of first aspect present invention is to propose the gas heater control method that a kind of degree of accuracy is high, Consumer's Experience is good.
Second aspect present invention object is the control system proposing a kind of gas heater.
To achieve these goals, the control method of the gas heater of first aspect present invention embodiment, comprises the following steps: according to the signal detection return water temperature of selection zero cold water function; Whether more described return water temperature is less than or equal to the first temperature, if so, then control unlatching zero cold water pattern and carry out preheating to control described gas heater, if not, then maintain current state, described first temperature is the difference that described design temperature deducts the first predetermined threshold value; Whether more described inflow temperature is greater than or equal to the second temperature, if so, then closes zero cold water pattern, otherwise, then maintain current state, described second temperature is the difference that described design temperature deducts the second predetermined threshold value, and described second predetermined threshold value is less than described first predetermined threshold value.
According to the control method of the gas heater of the embodiment of the present invention, by setting the first predetermined threshold value and the second predetermined threshold value, and the first predetermined threshold value and the second predetermined threshold value can according to the length of pipe adjustment of user family, can avoid causing return water temperature not reach the problem of the decision condition that preheating completes because of pipeline heat radiation always, stop Repeat-heating, shorten preheating time, improve Consumer's Experience.
In some instances, this control method also comprises: detect coolant-temperature gage, if described leaving water temperature continues to be greater than or equal to the described 3rd temperature scheduled time, then close zero cold water pattern, if not, then maintain current state, described 3rd temperature be described design temperature and the 3rd predetermined threshold value and, described 3rd predetermined threshold value is greater than the first predetermined threshold value.
In some instances, described first predetermined threshold value is 7 DEG C.
In some instances, described second predetermined threshold value is 5 DEG C.
In some instances, the described scheduled time is 4s, and described 3rd predetermined threshold value is 8 DEG C.
The control system of the gas heater of second aspect present invention embodiment, comprising: temperature sensor and controller.Described temperature sensor is used for the signal detection inflow temperature according to selection zero cold water function.Controller is used for more described return water temperature and whether is less than or equal to the first temperature, if so, then control unlatching zero cold water pattern and carry out preheating to control gas heater, if not, then maintain current state, described first temperature is the difference that described design temperature deducts the first predetermined threshold value; Described controller, also whether be more than or equal to described second temperature for more described return water temperature, if, then control closedown zero cold water pattern, if not, then maintain current state, described second temperature is the difference that described design temperature deducts the second predetermined threshold value, and described second predetermined threshold value is less than described first predetermined threshold value.
The control system of gas heater according to an embodiment of the invention, by setting the first predetermined threshold value and the second predetermined threshold value, and the first predetermined threshold value and the second predetermined threshold value can according to the length of pipe adjustment of user family, can avoid causing return water temperature not reach the problem of the decision condition that preheating completes because of pipeline heat radiation always, stop Repeat-heating, shorten preheating time, improve Consumer's Experience.
In some instances, also comprise: leaving water temperature sensors.Described leaving water temperature sensors is arranged on the outlet of the outlet pipe of described gas heater, for detecting coolant-temperature gage; If described leaving water temperature continues to be more than or equal to the described 3rd temperature scheduled time, described controller is also for cutting out zero cold water pattern, described 3rd temperature be described design temperature and the 3rd predetermined threshold value and, described 3rd predetermined threshold value is greater than described first predetermined threshold value.
The embodiment of third aspect present invention proposes a kind of control method of gas heater, comprises the following steps: according to the signal detection inflow temperature of selection zero cold water function; Judge whether described inflow temperature is less than or equal to the first temperature, zero cold water pattern of if so, then opening carries out preheating to control described gas heater, and if not, then maintain current state, described first temperature is the difference that design temperature deducts the first predetermined threshold value; Detect coolant-temperature gage; Judge whether described leaving water temperature continues to be greater than for the 3rd temperature scheduled time, if so, then closes zero cold water pattern, if not, then maintains current state, described 3rd temperature be described design temperature and the 3rd predetermined threshold value and.
According to the control method of the gas heater of the embodiment of the present invention, by setting the first predetermined threshold value and the 3rd predetermined threshold value, and the first predetermined threshold value and the 3rd predetermined threshold value can according to the length of pipe adjustment of user family, can avoid causing inflow temperature not reach the problem of the decision condition that preheating completes because of pipeline heat radiation always, stop Repeat-heating, shorten preheating time, improve Consumer's Experience.
The embodiment of fourth aspect present invention proposes a kind of control system of gas heater, it is characterized in that, comprising: temperature sensor, leaving water temperature sensors and controller.Temperature sensor is used for the signal detection inflow temperature according to selection zero cold water function.Described leaving water temperature sensors is arranged on the outlet pipe of described gas heater, for detecting coolant-temperature gage.Controller is used for more described inflow temperature and whether is less than or equal to the first temperature, if so, then control unlatching zero cold water pattern and carry out preheating to control gas heater, if not, then maintain current state, described first temperature is the difference that described design temperature deducts the first predetermined threshold value.Described controller is also for the size of more described leaving water temperature and the 3rd temperature, if described leaving water temperature continues to be more than or equal to the described 3rd temperature scheduled time, then described controller controls cut out zero cold water pattern, described 3rd temperature be described design temperature and the 3rd predetermined threshold value and, described 3rd predetermined threshold value is greater than described first predetermined threshold value.
According to the control system of the gas heater of the embodiment of the present invention, by setting the first predetermined threshold value and the 3rd predetermined threshold value, and the first predetermined threshold value and the 3rd predetermined threshold value can according to the length of pipe adjustment of user family, can avoid causing inflow temperature not reach the problem of the decision condition that preheating completes because of pipeline heat radiation always, stop Repeat-heating, shorten preheating time, improve Consumer's Experience.
The embodiment kind of fifth aspect present invention proposes a kind of gas heater, and described gas heater comprises the control system of above-mentioned gas heater.
The aspect that the present invention adds and advantage will part provide in the following description, and part will become obvious from the following description, or be recognized by practice of the present invention.
Accompanying drawing explanation
Fig. 1 is the flow chart of the control method of gas heater according to an embodiment of the invention;
The connection diagram of the gas heater of one embodiment of the invention in Fig. 2;
Fig. 3 is the structured flowchart of the control system of gas heater according to an embodiment of the invention;
Fig. 4 is the flow chart of the control method of the gas heater of one embodiment of the invention;
The connection diagram of the gas heater of one embodiment of the invention in Fig. 5; With
Fig. 6 is the structured flowchart of the control system of gas heater according to an embodiment of the invention.
Detailed description of the invention
In describing the invention, it will be appreciated that, term " " center ", " longitudinal direction ", " transverse direction ", " length ", " width ", " thickness ", " on ", D score, " front ", " afterwards ", " left side ", " right side ", " vertically ", " level ", " top ", " end " " interior ", " outward ", " clockwise ", " counterclockwise ", " axis ", " radial direction ", orientation or the position relationship of the instruction such as " circumference " are based on orientation shown in the drawings or position relationship, only the present invention for convenience of description and simplified characterization, instead of indicate or imply that the device of indication or element must have specific orientation, with specific azimuth configuration and operation, therefore limitation of the present invention can not be interpreted as.
In addition, term " first ", " second " only for describing object, and can not be interpreted as instruction or hint relative importance or imply the quantity indicating indicated technical characteristic.Thus, be limited with " first ", the feature of " second " can express or impliedly comprise at least one this feature.In describing the invention, the implication of " multiple " is at least two, such as two, three etc., unless otherwise expressly limited specifically.
In the present invention, unless otherwise clearly defined and limited, the term such as term " installation ", " being connected ", " connection ", " fixing " should be interpreted broadly, and such as, can be fixedly connected with, also can be removably connect, or integral; Can be mechanical connection, also can be electrical connection; Can be directly be connected, also indirectly can be connected by intermediary, can be the connection of two element internals or the interaction relationship of two elements, unless otherwise clear and definite restriction.For the ordinary skill in the art, above-mentioned term concrete meaning in the present invention can be understood as the case may be.
In the present invention, unless otherwise clearly defined and limited, fisrt feature second feature " on " or D score can be that the first and second features directly contact, or the first and second features are by intermediary mediate contact.And, fisrt feature second feature " on ", " top " and " above " but fisrt feature directly over second feature or oblique upper, or only represent that fisrt feature level height is higher than second feature.Fisrt feature second feature " under ", " below " and " below " can be fisrt feature immediately below second feature or tiltedly below, or only represent that fisrt feature level height is less than second feature.
Be described below in detail embodiments of the invention, the example of described embodiment is shown in the drawings, and wherein same or similar label represents same or similar element or has element that is identical or similar functions from start to finish.Be exemplary below by the embodiment be described with reference to the drawings, be intended to for explaining the present invention, and can not limitation of the present invention be interpreted as.
In describing the invention, mark before step or action, such as " step S1 " ~ " step S8 " is only for describing the object of the control method of the gas heater of the embodiment of the present invention, and instruction or hint relative ranks relation can not be interpreted as, therefore can not be interpreted as limitation of the present invention.
See Fig. 1, the control method of the gas heater of first aspect present invention embodiment, comprises the following steps:
According to the signal detection return water temperature of selection zero cold water function;
Relatively whether return water temperature is less than or equal to the first temperature, and if so, then control unlatching zero cold water pattern and carry out preheating to control gas heater, if not, then maintain current state, the first temperature is the difference that design temperature deducts the first predetermined threshold value;
Relatively whether return water temperature is greater than or equal to the second temperature, and if so, then close zero cold water pattern, if not, then maintain current state, the second temperature is the difference that design temperature deducts the second predetermined threshold value, and the second predetermined threshold value is less than the first predetermined threshold value.
Composition graphs 2, the specific implementation process prescription of the control method of the gas heater of first aspect present invention embodiment is as follows:
Step S1, according to the signal detection return water temperature of selection zero cold water function.
Particularly, user, when using gas heater, selects zero cold water pattern, and gas heater, according to the signal of selection zero cold water function, utilizes temperature sensor to detect return water temperature.As shown in Figure 2 have the situation of return pipe for gas heater, temperature sensor is arranged on the water return outlet place of the return pipe 2 of gas heater.What temperature sensor detected is the return water temperature entering water tank in return pipe.
Step S2, judges whether return water temperature is less than or equal to the first temperature.
Particularly, in one embodiment of the invention, the first temperature is the difference that design temperature deducts the first predetermined threshold value.That is,
T
in≤T
s-HA
1(1)
Wherein, T
infor return water temperature, T
sfor design temperature, HA
1it is the first predetermined threshold value.In an example of the present invention, the first predetermined threshold value HA
1be 7 DEG C, in specific implementation process, can adjust according to user family's length of pipe.Judge whether formula (1) is set up, if set up, then enter step S3, otherwise, then enter step S4.
Step S3, controls unlatching zero cold water pattern and carries out preheating to control gas heater.
Work as T
in≤ T
s-HA
1during establishment, gas heater then controls unlatching zero cold water pattern, and controller cuts out the stop valve 32 of water inlet pipe 3, opens the stop valve 22 of return pipe 2, to make water circulating pump, the water in return pipe 2 is drawn into water pump and heats.
Step S4, maintains current state.
Work as T
in≤ T
s-HA
1when being false, then maintain current state.Such as, controller controls the outlet valve 41 of outlet pipe 4 to control water outlet, for user.
The control procedure that zero cold water of the embodiment of the present invention is closed can have two kinds of modes, respectively as described in step S5 and step S7.
Step S5, compares return water temperature and whether is greater than or equal to the second temperature.
Particularly, in one embodiment of the invention, the second temperature is the difference that design temperature deducts the second predetermined threshold value, and the second predetermined threshold value is less than the first predetermined threshold value.Namely
T
in≥T
s-HA
2(2)
Wherein, T
infor return water temperature, T
sfor design temperature, HA
2it is the second predetermined threshold value.In an example of the present invention, the second predetermined threshold value HA
2be 5 DEG C, in specific implementation process, can adjust according to user family's length of pipe.Judge whether formula (2) is set up, if set up, then enter step S6, otherwise, then enter step S4.
Step S6, closes zero cold water pattern.
Work as T
in>=T
s-HA
2during establishment, then close zero cold water pattern.Gas heater preheating completes, and controller controls to cut out stop valve 22 in return pipe, controls the stop valve 31 opening water inlet pipe 3, thus makes the water in water inlet pipe 3 enter water pump to heat.
Step S7, detects coolant-temperature gage.
Particularly, the leaving water temperature sensors being arranged on the exit of outlet pipe is utilized to detect coolant-temperature gage.
Step S8, if leaving water temperature continues to be greater than for the 3rd temperature scheduled time, then enters step S6, otherwise, then enter step S4.3rd temperature be design temperature and the 3rd predetermined threshold value and, the 3rd predetermined threshold value is greater than the first predetermined threshold value.Particularly, namely judge whether following formula (3) is set up and predetermined hold-time.
T
out≥T
s+HA
3(3)
Wherein, T
outfor leaving water temperature, T
sfor design temperature, HA
3it is the 3rd predetermined threshold value.In an example of the present invention, the 3rd predetermined threshold value HA
3be 8 DEG C, in specific implementation process, can adjust according to user family's length of pipe.Same, leaving water temperature can be continued to be greater than the decision condition that the 3rd temperature scheduled time completed as preheating.In an example of the present invention, formula (3) is set up and is continued 4s, then enter step S6, otherwise, then enter step S4.
The control method of above-mentioned gas heater, by setting the first predetermined threshold value and the second predetermined threshold value, and the first predetermined threshold value and the second predetermined threshold value can according to the length of pipe adjustment of user family, the problem causing always not reaching into return water temperature the decision condition that preheating completes because of pipeline heat radiation can be avoided, stop Repeat-heating, shorten preheating time, improve Consumer's Experience.
The control system 100 of the gas heater of second aspect present invention embodiment, as shown in Figure 3, comprising: temperature sensor 10 and controller 20.
Temperature sensor 10 is for the signal detection inflow temperature according to selection zero cold water function.Whether controller 20 is less than the first temperature for comparing return water temperature, if so, then controller 20 controls unlatching zero cold water pattern and carries out preheating to control gas heater, if not, then controller 20 maintains current state, and the first temperature is the difference that design temperature deducts the first predetermined threshold value.Whether controller 20 is also greater than the second temperature for comparing return water temperature, if so, then controls closedown zero cold water pattern, if not, then maintain current state, the second temperature is the difference that design temperature deducts the second predetermined threshold value, and the second predetermined threshold value is less than the first predetermined threshold value.
In one embodiment of the invention, system 100 also comprises leaving water temperature sensors 30.Leaving water temperature sensors 30 is arranged on the outlet of the outlet pipe of gas heater, for detecting coolant-temperature gage.If leaving water temperature continues to be greater than for the 3rd temperature scheduled time, controller 20 also for closing zero cold water pattern, the 3rd temperature be design temperature and the 3rd predetermined threshold value and, the 3rd predetermined threshold value is greater than the first predetermined threshold value.
Particularly, user, when using gas heater, selects zero cold water pattern, and gas heater, according to the signal of selection zero cold water function, utilizes temperature sensor to detect return water temperature.As shown in Figure 2 have the situation of return pipe for gas heater, temperature sensor is arranged on the water return outlet place of the return pipe 2 of gas heater.What temperature sensor detected is the return water temperature entering water tank in return pipe 2.
Controller 20 compares inflow temperature and whether is less than or equal to the first temperature.Particularly, in one embodiment of the invention, the first temperature is the difference that design temperature deducts the first predetermined threshold value.That is,
T
in≤T
s-HA
1(1)
Wherein, T
infor water inlet/return water temperature, T
sfor design temperature, HA
1it is the first predetermined threshold value.In an example of the present invention, the first predetermined threshold value HA
1be 7 DEG C, in specific implementation process, can according to the length of pipe adjustment of user family.Judge whether formula (1) is set up, if set up, gas heater then controls unlatching zero cold water pattern, and controller cuts out the stop valve 31 of water inlet pipe 3, open the stop valve 22 of return pipe 2, to make water circulating pump, the water in return pipe is drawn into water pump and heats.Otherwise, then current state is maintained.As, controller controls the outlet valve 41 of outlet pipe 4 to control water outlet, for user.
The control procedure that zero cold water of the embodiment of the present invention is closed can have two kinds of modes, as described below respectively:
(1) controller 20 compares return water temperature and whether is greater than or equal to the second temperature.
Particularly, in one embodiment of the invention, the second temperature is the difference that design temperature deducts the second predetermined threshold value.Namely
T
in≥T
s-HA
2(2)
Wherein, T
infor water inlet/return water temperature, T
sfor design temperature, HA
2be the second predetermined threshold value, the second predetermined threshold value is less than the first predetermined threshold value.In an example of the present invention, the second predetermined threshold value HA
2be 5 DEG C, in specific implementation process, can according to the length of pipe adjustment of user family.Judge whether formula (2) is set up, if set up, then controller 20 controls cut out zero cold water pattern, gas heater preheating completes, controller controls to cut out the stop valve 22 of return pipe, controls the stop valve opening water inlet pipe 3, thus makes the water in water inlet pipe 3 enter water pump to heat.Otherwise, then current state is maintained.
(2) system 100 of the present invention also comprises leaving water temperature sensors 30.Leaving water temperature sensors 30 is arranged on the exit of outlet pipe, for detecting coolant-temperature gage.
If leaving water temperature continues to be greater than or equal to for the 3rd temperature scheduled time, then controller 20 controls cut out zero cold water pattern, otherwise, then maintain current state.
Particularly, namely judge whether following formula (3) is set up and predetermined hold-time.
T
out≥T
s+HA
3(3)
Wherein, T
outfor leaving water temperature, T
sfor design temperature, HA
3be the 3rd predetermined threshold value, the 3rd predetermined threshold value is greater than the first predetermined threshold value.In an example of the present invention, the 3rd predetermined threshold value HA
3be 8 DEG C, in specific implementation process, can according to the length of pipe adjustment of user family.Same, leaving water temperature can be continued to be greater than the decision condition that the 3rd temperature scheduled time completed as preheating.In an example of the present invention, formula (3) is set up and is continued 4s, then controller 20 controls cut out zero cold water pattern, otherwise, then maintain current state.
The control system of above-mentioned gas heater, by setting the first predetermined threshold value and the second predetermined threshold value, and the first predetermined threshold value and the second predetermined threshold value can according to the length of pipe adjustment of user family, can avoid causing return water temperature not reach the problem of the decision condition that preheating completes because of pipeline heat radiation always, stop Repeat-heating, shorten preheating time, improve Consumer's Experience.
Third aspect present invention embodiment proposes a kind of control method of gas heater, comprises the following steps:
According to the signal detection inflow temperature of selection zero cold water function;
Judge whether inflow temperature is less than or equal to the first temperature, zero cold water pattern of if so, then opening, to control the leaving water temperature of gas heater, if not, then maintains current state, and the first temperature is the difference that design temperature deducts the first predetermined threshold value;
Detect coolant-temperature gage;
Judge whether coolant-temperature gage continues to be greater than or equal to for the 3rd temperature scheduled time, if so, then closes zero cold water pattern, if not, then maintains current state, the 3rd temperature be design temperature and the 3rd predetermined threshold value and, the 3rd predetermined threshold value is greater than the first predetermined threshold value.
Composition graphs 4, the specific implementation process prescription of the control method of the gas heater of third aspect present invention embodiment is as follows:
Step S1, according to the signal detection inflow temperature of selection zero cold water function.
Particularly, user, when using gas heater, selects zero cold water pattern, and gas heater, according to the signal of selection zero cold water function, utilizes temperature sensor to detect inflow temperature.The situation without return pipe as shown in Figure 5, temperature sensor is arranged on the import department of the water inlet pipe 3 of gas heater.What temperature sensor detected is the inflow temperature entering water tank in water inlet pipe 3.
Step S2, judges whether inflow temperature is less than or equal to the first temperature.
Particularly, in one embodiment of the invention, the first temperature is the difference that design temperature deducts the first predetermined threshold value.That is,
T
in≤T
s-HA
1(1)
Wherein, T
infor return water temperature, T
sfor design temperature, HA
1it is the first predetermined threshold value.In an example of the present invention, the first predetermined threshold value HA
1be 7 DEG C, in specific implementation process, can according to the length of pipe adjustment of user family.Judge whether formula (1) is set up, if set up, then enter step S3, otherwise, then enter step S4.
Step S3, controls unlatching zero cold water pattern and carries out preheating to control gas heater.
Work as T
in≤ T
s-HA
1during establishment, gas heater then controls unlatching zero cold water pattern, and controller cuts out the stop valve 32 of water inlet pipe 3, and controller controls to heat the water in water pump.
Step S4, maintains current state.
Work as T
in≤ T
s-HA
1when being false, then maintain current state.As, controller controls the outlet valve 41 of outlet pipe 4 to control water outlet, for user.
The control procedure that zero cold water of the embodiment of the present invention is closed is as described below:
Step S5, detects coolant-temperature gage.
Particularly, the leaving water temperature sensors being arranged on the exit of outlet pipe is utilized to detect coolant-temperature gage.
Step S6, if leaving water temperature continues to be greater than or the 3rd temperature scheduled time, then enters step S7, otherwise, then enter step S4.Particularly, namely judge whether following formula (3) is set up and predetermined hold-time.
T
out≥T
s+HA
3(3)
Wherein, T
outfor leaving water temperature, T
sfor design temperature, HA
3be the 3rd predetermined threshold value, the 3rd predetermined threshold value is greater than the first predetermined threshold value.In an example of the present invention, the 3rd predetermined threshold value HA
3be 8 DEG C, in specific implementation process, can according to the length of pipe adjustment of user family.Leaving water temperature can be continued to be greater than the decision condition that the 3rd temperature scheduled time completed as preheating.In an example of the present invention, formula (3) is set up and is continued 4s, then enter step S7, otherwise, then enter step S4.
Step S7, closes zero cold water pattern.
Work as T
in>=T
s-HA
2during establishment, then close zero cold water pattern.Gas heater preheating completes, and controller controls to open the stop valve of water inlet pipe 3, thus makes the water in water inlet pipe 3 enter water pump to heat.
The control method of above-mentioned gas heater, by setting the first predetermined threshold value and the 3rd predetermined threshold value, and the first predetermined threshold value and the 3rd predetermined threshold value can according to the length of pipe adjustment of user family, the problem causing always not reaching into return water temperature the decision condition that preheating completes because of pipeline heat radiation can be avoided, stop Repeat-heating, shorten preheating time, improve Consumer's Experience.
The embodiment of fourth aspect present invention proposes a kind of control system 200 of gas heater, comprising: temperature sensor 201, leaving water temperature sensors 202 and controller 203.
Temperature sensor 201 is for the signal detection inflow temperature according to selection zero cold water function.Leaving water temperature sensors 202 arranges the outlet pipe of gas heater, for detecting coolant-temperature gage.Whether controller 203 is less than or equal to the first temperature for comparing inflow temperature, if so, then control unlatching zero cold water pattern and carry out preheating to control gas heater, if not, then maintain current state, the first temperature is the difference that design temperature deducts the first predetermined threshold value.Controller 203 is also for comparing the size of coolant-temperature gage and the 3rd temperature, if leaving water temperature continues to be more than or equal to for the 3rd temperature scheduled time, then controller controls cut out zero cold water pattern, the 3rd temperature be design temperature and the 3rd predetermined threshold value and, the 3rd predetermined threshold value is greater than the first predetermined threshold value.
Composition graphs 6, the specific implementation process prescription of the control system 200 of the gas heater of fourth aspect present invention embodiment is as follows:
Temperature sensor 201 is according to the signal detection inflow temperature of selection zero cold water function.
Particularly, user, when using gas heater, selects zero cold water pattern, and gas heater, according to the signal of selection zero cold water function, utilizes temperature sensor to detect inflow temperature.The situation without return pipe as shown in Figure 5, temperature sensor is arranged on the import department of the water inlet pipe 3 of gas heater.What temperature sensor detected is the inflow temperature entering water tank in water inlet pipe 3.
Controller 203 judges whether inflow temperature is less than or equal to the first temperature.
Particularly, in one embodiment of the invention, the first temperature is the difference that design temperature deducts the first predetermined threshold value.That is,
T
in≤T
s-HA
1(1)
Wherein, T
infor return water temperature, T
sfor design temperature, HA
1it is the first predetermined threshold value.In an example of the present invention, the first predetermined threshold value HA
1be 7 DEG C, in specific implementation process, can according to the length of pipe adjustment of user family.Judge whether formula (1) is set up, if set up, then controller 203 controls the stop valve 32 that unlatching zero cold water mode controller closes water inlet pipe 3, and controller controls to heat the water in water pump.Otherwise controller 203 controls to maintain current state, as controller 203 controls outlet valve water outlet, for user.
Leaving water temperature sensors 202 is for detecting coolant-temperature gage.
Particularly, the leaving water temperature sensors 202 being arranged on the outlet of outlet pipe is utilized to detect coolant-temperature gage.
If controller 203 detects that leaving water temperature continues to be greater than or the 3rd temperature scheduled time, then controller 203 controls cut out zero cold water pattern, otherwise, then control to maintain current state.Particularly, namely judge whether following formula (3) is set up and predetermined hold-time.
T
out≥T
s+HA
3(3)
Wherein, T
outfor leaving water temperature, T
sfor design temperature, HA
3be the 3rd predetermined threshold value, the 3rd predetermined threshold value is greater than the first predetermined threshold value.In an example of the present invention, the 3rd predetermined threshold value HA
3be 8 DEG C, in specific implementation process, can according to the length of pipe adjustment of user family.Leaving water temperature can be continued to be greater than the decision condition that the 3rd temperature scheduled time completed as preheating.In an example of the present invention, formula (3) is set up and is continued 4s, then controller 203 controls cut out zero cold water pattern.Gas heater preheating completes, and controller 203 controls to open the stop valve 31 of water inlet pipe 3, thus makes the water in water inlet pipe 3 enter water pump to heat.
The control system of above-mentioned gas heater, by setting the first predetermined threshold value and the 3rd predetermined threshold value, and the first predetermined threshold value and the 3rd predetermined threshold value can according to the length of pipe adjustment of user family, the problem causing always not reaching into return water temperature the decision condition that preheating completes because of pipeline heat radiation can be avoided, stop Repeat-heating, shorten preheating time, improve Consumer's Experience.
Propose a kind of gas heater in the embodiment of fifth aspect present invention, comprise the control system 100 or 200 of foregoing gas heater, concrete embodiment see the control method of gas heater and components of system as directed, can repeat no more here.
In fact, gas heater also comprises other equipment except comprising the control system 100 or 200 of foregoing gas heater, and the specific implementation of other equipment is facile for those skilled in the art hold, and repeats no more here.
Can avoid according to the gas heater of the embodiment of the present invention problem causing always not reaching into return water temperature the decision condition that preheating completes because of pipeline heat radiation, stop Repeat-heating, shortened preheating time, improved Consumer's Experience.
In the description of this description, specific features, structure, material or feature that the description of reference term " embodiment ", " some embodiments ", " example ", " concrete example " or " some examples " etc. means to describe in conjunction with this embodiment or example are contained at least one embodiment of the present invention or example.In this manual, to the schematic representation of above-mentioned term not must for be identical embodiment or example.And the specific features of description, structure, material or feature can combine in one or more embodiment in office or example in an appropriate manner.In addition, when not conflicting, the feature of the different embodiment described in this description or example and different embodiment or example can carry out combining and combining by those skilled in the art.
Although illustrate and describe embodiments of the invention above, be understandable that, above-described embodiment is exemplary, can not be interpreted as limitation of the present invention, and those of ordinary skill in the art can change above-described embodiment within the scope of the invention, revises, replace and modification.
Claims (10)
1. a control method for gas heater, is characterized in that, comprises the following steps:
According to the signal detection return water temperature of selection zero cold water function;
Judge whether described return water temperature is less than or equal to the first temperature, zero cold water pattern of if so, then opening carries out preheating to control described gas heater, and if not, then maintain current state, described first temperature is the difference that design temperature deducts the first predetermined threshold value;
Whether more described return water temperature is more than or equal to the second temperature, if so, then closes zero cold water pattern, if not, then maintain current state, described second temperature is the difference that described design temperature deducts the second predetermined threshold value, and described second predetermined threshold value is less than described first predetermined threshold value.
2. the control method of gas heater as claimed in claim 1, it is characterized in that, the method also comprises:
Obtain described leaving water temperature, if described leaving water temperature continues to be more than or equal to for the 3rd temperature scheduled time, then close zero cold water pattern, otherwise, then maintain current state, described 3rd temperature be described design temperature and the 3rd predetermined threshold value and, described 3rd predetermined threshold value is greater than described first predetermined threshold value.
3. the control method of gas heater as claimed in claim 1, it is characterized in that, described first predetermined threshold value is 7 DEG C.
4. the control method of gas heater as claimed in claim 1, it is characterized in that, described second predetermined threshold value is 5 DEG C.
5. the control method of gas heater as claimed in claim 2, it is characterized in that, the described scheduled time is 4s, and described 3rd predetermined threshold value is 8 DEG C.
6. a control system for gas heater, is characterized in that, comprising:
Temperature sensor, for the signal detection return water temperature according to selection zero cold water function;
Whether controller, be less than or equal to the first temperature for more described return water temperature, if, then control unlatching zero cold water pattern and carry out preheating to control gas heater, if not, then maintain current state, described first temperature is the difference that described design temperature deducts the first predetermined threshold value;
Described controller, also whether be more than or equal to described second temperature for more described return water temperature, if, then control closedown zero cold water pattern, if not, then maintain current state, described second temperature is the difference that described design temperature deducts the second predetermined threshold value, and described second predetermined threshold value is less than described first predetermined threshold value.
7. the control system of gas heater as claimed in claim 6, is characterized in that, also comprise:
Leaving water temperature sensors, described leaving water temperature sensors is arranged on the outlet pipe of described gas heater, for detecting coolant-temperature gage;
If described leaving water temperature continues to be more than or equal to the described 3rd temperature scheduled time, described controller is also for cutting out zero cold water pattern, described 3rd temperature be described design temperature and the 3rd predetermined threshold value and, described 3rd predetermined threshold value is greater than described first predetermined threshold value.
8. a control method for gas heater, is characterized in that, comprises the following steps:
According to the signal detection inflow temperature of selection zero cold water function;
Judge whether described inflow temperature is less than or equal to the first temperature, zero cold water pattern of if so, then opening carries out preheating to control described gas heater, and if not, then maintain current state, described first temperature is the difference that design temperature deducts the first predetermined threshold value;
Detect coolant-temperature gage;
Judge whether described leaving water temperature continues to be greater than or equal to for the 3rd temperature scheduled time, if so, then closes zero cold water pattern, if not, then maintain current state, described 3rd temperature be described design temperature and the 3rd predetermined threshold value and, described 3rd predetermined threshold value is greater than described first predetermined threshold value.
9. a control system for gas heater, is characterized in that, comprising:
Temperature sensor, for the signal detection inflow temperature according to selection zero cold water function;
Leaving water temperature sensors, described leaving water temperature sensors is arranged on the outlet pipe of described gas heater, for detecting coolant-temperature gage;
Whether controller, be less than or equal to the first temperature for more described inflow temperature, if, then control unlatching zero cold water pattern and carry out preheating to control gas heater, if not, then maintain current state, described first temperature is the difference that described design temperature deducts the first predetermined threshold value;
Described controller is also for the size of more described leaving water temperature and the 3rd temperature, if described leaving water temperature continues to be more than or equal to the described 3rd temperature scheduled time, then described controller controls cut out zero cold water pattern, described 3rd temperature be described design temperature and the 3rd predetermined threshold value and, described 3rd predetermined threshold value is greater than described first predetermined threshold value.
10. a gas heater, is characterized in that, comprises the control system of the gas heater as described in claim 6,7 or 9.
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| CN201510052011.9A CN104633945B (en) | 2015-01-30 | 2015-01-30 | The control method and system and gas heater of gas heater |
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| CN201510052011.9A CN104633945B (en) | 2015-01-30 | 2015-01-30 | The control method and system and gas heater of gas heater |
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Effective date of registration: 20221102 Address after: 241000 west side of 3 / F, No.5 office building, new energy and new materials gathering area, Fuzhou Road, Jiangbei District, Wuhu City, Anhui Province Patentee after: Wuhu Midea intelligent kitchen electricity Manufacturing Co.,Ltd. Address before: 241009 Wan Chun East Road, East Wuhu economic and Technological Development Zone, Wuhu, Anhui Patentee before: WUHU MIDEA KITCHEN AND BATH APPLIANCES MFG. Co.,Ltd. |