CN210951828U - Zero-cold-water gas water heater capable of limiting preheating temperature - Google Patents
Zero-cold-water gas water heater capable of limiting preheating temperature Download PDFInfo
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- CN210951828U CN210951828U CN201921212352.8U CN201921212352U CN210951828U CN 210951828 U CN210951828 U CN 210951828U CN 201921212352 U CN201921212352 U CN 201921212352U CN 210951828 U CN210951828 U CN 210951828U
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Abstract
The utility model discloses a zero-cold-water gas water heater for limiting preheating temperature, which comprises a zero-cold-water gas water heater body, a built-in water pump, a water outlet temperature detection module for detecting water temperature, a return water temperature detection module for detecting return water temperature, a gas control valve for controlling the on-off of gas and gas flow, an operation display module and a controller; the operation display module, the built-in water pump, the water outlet temperature detection module, the backwater temperature detection module and the gas control valve are all electrically connected with the controller. The utility model discloses according to return water temperature, the leaving water temperature, predetermine the relation between the temperature, the flow aperture of control gas control valve adjusts the burning firepower, and control leaving water temperature restricts the preheating temperature of circulating pipe internal circulation water to solve the too high problem of zero cold water gas heater circulating line memory temperature degree of current.
Description
Technical Field
The utility model belongs to the technical field of zero cold water gas heater, concretely relates to zero cold water gas heater of restriction preheating temperature.
Background
At present, the zero-cold-water gas water heater is a trend in the water heater industry because hot water can be instantly used after being opened, when a preheating function is started, a built-in circulating pump arranged in the zero-cold-water gas water heater operates, water stored in an external hot water outlet pipe and a water return pipe of the zero-cold-water gas water heater is pumped back to the zero-cold-water gas water heater for preheating, a circulating pipeline is formed, and preheating is achieved.
In the preheating process, the firepower of the zero-cold-water gas water heater is adjusted according to the deviation of the outlet water temperature and the preset temperature, so that the outlet water temperature reaches the preset temperature. The preset temperature setting range of the gas water heater is generally 35-60 ℃. When the preset temperature of the zero-cold-water gas water heater is too high (such as 60 ℃), after the zero-cold-water gas water heater starts the preheating function, the water temperature of the zero-cold-water gas water heater is controlled according to the preset temperature, after preheating is completed, the water temperature of water stored in a circulating pipeline is close to 60 ℃, and if a user opens a hot water faucet at the moment to use hot water, the risk of scalding exists.
SUMMERY OF THE UTILITY MODEL
In order to solve the problem that the temperature of water stored in a circulating pipeline of a zero-cold-water gas water heater is too high, the zero-cold-water gas water heater capable of limiting the preheating temperature of water stored in the circulating pipeline is provided.
The utility model provides a zero-cold-water gas water heater for limiting preheating temperature, which comprises a zero-cold-water gas water heater body, a built-in water pump, a water outlet temperature detection module, a return water temperature detection module, a gas control valve, an operation display module and a controller;
the internal water pump is arranged on a water flow passage in the zero-cold-water gas water heater body, the water outlet temperature detection module for detecting the temperature of water is arranged at the water outlet end in the zero-cold-water gas water heater body, the return water temperature detection module for detecting the return water temperature is arranged at the water inlet end in the zero-cold-water gas water heater body, the gas control valve for controlling the on-off of gas and the gas flow is arranged on an air inlet pipeline in the zero-cold-water gas water heater body, the operation display module for setting the temperature, starting the preheating mode, recording the preheating and heat preservation time and displaying the preset temperature is arranged on the outer side wall of the zero-cold-water gas water heater body, and the operation display module, the internal water pump, the water outlet temperature detection module, the return water temperature detection module and the gas.
Preferably, the operation display module comprises a temperature setting key for setting temperature, a preheating function key for starting a preheating mode of the zero-cold-water gas water heater, and a display screen for displaying the preset temperature;
the temperature setting key, the preheating function key and the display screen are electrically connected with the controller.
Preferably, the temperature setting key includes a temperature increase key and a temperature decrease key.
Preferably, the water outlet temperature detection module is a water outlet temperature detection probe; the return water temperature detection module is a return water temperature detection probe.
Compared with the prior art, the utility model discloses a zero cold water gas heater of restriction preheating temperature adopts above-mentioned scheme's beneficial effect to do:
when the built-in water pump is started, a water flow passage in the zero-cold-water gas water heater body and a water return pipe outside the zero-cold-water gas water heater body form a circulation pipeline, a water return temperature detection module can detect the water return temperature of the water inlet end of the zero-cold-water gas water heater body in real time, an outlet water temperature detection module can detect the outlet water temperature of the water outlet end of the zero-cold-water gas water heater body in real time, an operation display module is used for setting the temperature, starting a preheating mode, recording the preheating time and displaying the preset temperature, namely the preset temperature of the zero-cold-water gas water heater body is set through the operation display module, when the zero-cold-water gas water heater body enters the preheating mode is determined through the operation display module, and meanwhile, the preheating and heat preservation time of the preheating and; the gas control valve is used for controlling the on-off of gas and the gas flow;
because the operation display module, the built-in water pump, the water outlet temperature detection module, the return water temperature detection module and the gas control valve are electrically connected with the controller, when a user sets a preset temperature through the operation display module and starts a preheating mode of the zero-cold-water gas water heater body, the controller receives corresponding information and controls the built-in water pump to operate, the gas control valve is opened, the built-in water pump operates to enable water stored in the circulating pipeline to start circulation, and the gas control valve is opened to enable gas to enter the zero-cold-water gas water heater body to be ignited to heat water circulating in the circulating pipeline, so that preheating is achieved.
Meanwhile, the controller controls the flow opening of the gas control valve according to the relation between the return water temperature, the outlet water temperature and the preset temperature, so that the combustion firepower is adjusted, the outlet water temperature is controlled, and the preheating temperature of circulating water in a circulating pipeline is limited, thereby solving the problem that the temperature of water stored in the circulating pipeline of the existing zero-cold-water gas water heater is too high.
Drawings
FIG. 1 is a schematic structural diagram of a zero-cold-water gas water heater with a preheating temperature limitation according to the present invention;
FIG. 2 is a schematic structural diagram of a zero-cold water gas water heater with a preheating temperature limitation according to the present invention without an external water passage;
FIG. 3 is a flow chart of the total operation of a zero-cold water gas water heater for limiting the preheating temperature according to the present invention;
FIG. 4 is a first flowchart of a zero-cold water gas water heater with a pre-heating temperature limitation according to the present invention;
FIG. 5 is a second flowchart of the zero cold water gas water heater with preheat temperature limitation provided by the present invention;
in the figure: 1. a zero cold water gas water heater body; 2. a built-in water pump; 3. an effluent temperature detection module; 4. a gas control valve; 5. an operation display module; 51. a temperature setting key; 52. a preheating function key; 53. a display screen; 6. a controller; 7. and a return water temperature detection module.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention will be further described in detail with reference to the following embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.
Zero cold water gas water heaters typically exist in several modes: a common mode, a preheating mode and a preheating and heat-preserving mode; the common mode comprises a normal working state and a standby state of the zero-cold-water gas water heater.
The embodiment provides a zero-cold-water gas water heater capable of limiting preheating temperature, which comprises a zero-cold-water gas water heater body 1, a built-in water pump 2, an outlet water temperature detection module 3, a return water temperature detection module 7, a gas control valve 4, an operation display module 5 and a controller 6, as shown in fig. 1-2;
the built-in water pump 2 is arranged on a water flow path in the zero-cold-water gas water heater body 1, the water outlet temperature detection module 3 for detecting the temperature of water is arranged at the water outlet end in the zero-cold-water gas water heater body 1, the return water temperature detection module 7 for detecting the return water temperature is arranged at the water inlet end in the zero-cold-water gas water heater body 1, the gas control valve 4 for controlling the on-off of gas and the gas flow is arranged on an air inlet pipeline in the zero-cold-water gas water heater body 1, the operation display module 5 for setting the temperature, starting the preheating mode, recording the preheating and heat preservation time and displaying the preset temperature is arranged on the outer side wall of the zero-cold-water gas water heater body 1, and the operation display module 5, the built-in water pump 2, the water outlet temperature detection module 3, the return water temperature detection.
When the built-in water pump 2 is started, a water flow passage in the zero-cold-water gas water heater body 1 and a water return pipe outside the zero-cold-water gas water heater body form a circulation pipeline, a water return temperature detection module 7 can detect the water return temperature of the water inlet end of the zero-cold-water gas water heater body 1 in real time, an outlet water temperature detection module 3 can detect the outlet water temperature of the water outlet end of the zero-cold-water gas water heater body 1 in real time, an operation display module 5 is used for setting the temperature, starting a preheating mode, recording the preheating time and displaying the preset temperature, namely the operation display module 5 is used for setting the preset temperature of the zero-cold-water gas water heater body 1, determining when the zero-cold-water gas water heater body 1 enters the preheating mode through the operation display module, and automatically recording the time of the; the gas control valve 4 is used for controlling the on-off of gas and the gas flow;
because the operation display module 5, the built-in water pump 2 and the gas control valve 4 are electrically connected with the controller 6, when a user sets a preset temperature through the operation display module 5 and starts a preheating mode of the zero-cold water gas water heater body 1, the controller 6 receives corresponding information, the controller 6 controls the built-in water pump 2 to operate, the gas control valve 4 is opened, the built-in water pump 2 operates to enable water stored in a circulating pipeline to start to circulate, and the gas control valve 4 is opened to enable gas to enter the zero-cold water gas water heater body 1 to ignite and heat water circulating in the circulating pipeline, so that preheating is realized;
and because the outlet water temperature detection module 3 and the return water temperature detection module 7 are both electrically connected with the controller 6, the controller 6 can receive the outlet water temperature and the return water temperature in time, switch the mode of the zero-cold-water gas water heater according to the relation between the outlet water temperature, the return water temperature and the preset temperature, or control the opening and closing of the built-in water pump 2 and the gas control valve 4 to control the temperature of the water stored in the circulating pipeline, thereby solving the problem that the temperature of the water stored in the circulating pipeline of the existing zero-cold-water gas water heater is too high.
In the specific embodiment, the operation display module 5 comprises a temperature setting key 51 for setting temperature, a preheating function key 52 for starting a preheating mode of the zero-cold-water gas water heater, and a display screen 53 for displaying a preset temperature;
the temperature setting key 51, the preheating function key 52 and the display 53 are all electrically connected with the controller 6;
the user sets a preset temperature through the temperature setting key 51, and the set temperature is displayed on the display screen 53, so that the user can conveniently watch the temperature; the user can start the preheating mode of the zero-cold-water gas water heater according to the self requirement by pressing the preheating function key 52, and the use of the user is facilitated.
In the embodiment, the temperature setting key 51 includes a temperature-up key and a temperature-down key, which enables the user to set the temperature at a desired temperature value more quickly.
In a specific embodiment, the outlet water temperature detection module 3 is an outlet water temperature detection probe; return water temperature detection module 7 is return water temperature detection probe, and temperature detection probe belongs to current product, can directly obtain through purchasing, and simple structure, and the low price reduces the manufacturing cost of this embodiment.
The working process of the embodiment is as follows:
the zero-cold water gas water heater body 1 is set to enter a preheating mode through the preheating function key 52, the preset temperature is set through the temperature setting key 51, the preset temperature is displayed on the display screen 53, after the zero-cold water gas water heater body 1 enters the preheating mode, the built-in water pump 2 runs, the gas control valve 4 is opened, the gas enters the zero-cold water gas water heater body 1 to be ignited, preheating the water in the circulating pipeline, wherein a return water temperature detection module 7 is used for detecting the return water temperature of the zero-cold water gas water heater body 1, an outlet water detection module 3 is used for detecting the outlet water temperature of the zero-cold water gas water heater body 1, and the return water temperature and the outlet water temperature are fed back to the controller 6, the controller 6 controls the working mode of the zero-cold-water gas water heater body 1 according to the return water temperature, the outlet water temperature and the preset temperature, and the temperature of the water stored in the circulating pipeline is controlled, so that the problem that the temperature of the water stored in the circulating pipeline of the existing zero-cold-water gas water heater is too high is solved.
The utility model provides a zero cold water gas heater's of restriction preheating temperature total work flow process includes following step, as shown in FIG. 3:
s1, starting a preheating mode of the zero-cold-water gas water heater body 1;
s2, detecting the preset temperature T of the zero-cold-water gas water heater body 1Preset of；
S3, judging the preset temperature TPreset ofWhether or not: t isPreset of＞TPreheating maxWherein T isPreheating maxA maximum preheat temperature within a preheat temperature threshold range;
if not, the controller 6 controls the temperature T according to the preset temperaturePreset ofControlling the temperature of the circulating pipeline water storage;
if yes, the controller 6 will automatically preset the temperature T firstPreset ofIs reduced to a target preheating temperature TTargetThen according to the target preheating temperature TTargetControlling the temperature of the circulating water, the target preheating temperature TTargetIs any temperature value within the range of the preheating temperature threshold value.
Wherein the preheating temperature threshold range is the preset temperature T when the zero-cold-water gas water heater body is in the preheating modePreset ofThe set range of (1), which is a temperature range pre-stored in the zero cold water gas water heater controller;
the preheating temperature threshold can range from 35 ℃ to 50 ℃, then TPreheating maxIs 50 ℃ just; preset temperature T set to avoid user overshootPreset ofThe temperature of the stored water in the circulating pipeline is too high, and the scald is caused.
Providing a workflow state for a zero cold water gas water heater with limited preheat temperature, comprising the steps of, as shown in fig. 4:
s1, starting a preheating mode of the zero-cold-water gas water heater body 1 by operating the preheating function key 52 of the display module 5, controlling the built-in water pump 2 to operate by the controller 6, controlling the gas control valve 4 to be opened, and enabling the zero-cold-water gas water heater body 1 to enter the preheating mode from a common mode;
s2, the controller 6 records the preset temperature T when the preheating mode of the zero-cold-water gas water heater body 1 is startedPreset ofThe backwater temperature detection module 7 detects the backwater temperature TReturn waterAnd the temperature T of the return waterReturn waterTo the controller 6;
s3, the controller 6 judges the preset temperature TPreset ofWhether or not: t isPreset of＞TPreheating maxWherein T isPreheating maxFor preheatingA maximum preheat temperature of a temperature threshold range; if not, go to S31; if yes, proceed to S32:
s31, the controller 6 receives the return water temperature T sent by the return water temperature detection module 7Return waterAnd judging the backwater temperature TReturn waterWhether or not it is satisfied; t isReturn water＞TPreset of；
If not, the controller 6 controls the zero-cold-water gas water heater body 1 to continuously maintain the preheating mode and preset the temperature TPreset ofThe set range of (1) is a preheating temperature threshold range;
if yes, the controller 6 controls the zero-cold-water gas water heater body 1 to exit the preheating mode and controls the preset temperature T at the same timePreset ofThe set range of the temperature control device is recovered to a preset temperature threshold range from a preheating temperature threshold range, and the normal mode is entered;
s32, the controller 6 automatically sets the preset temperature TPreset ofIs reduced to a target preheating temperature TTargetAnd S31 is repeated.
The zero-cold-water gas water heater of the embodiment firstly judges T in the working processPreset ofAnd a preheating temperature TPreheating maxCan control the temperature of the circulating pipeline storage water at the maximum preheating temperature TPreheating maxThe problem that the temperature of water stored in the circulating pipeline is too high due to the fact that the preset temperature of a user is too high is solved;
then, the return water temperature T is judgedReturn waterAnd TPreset ofWhen T isReturn water＜TPreset ofIf so, maintaining the preheating mode; when T isReturn water＞TPreset ofAnd directly exiting the preheating mode and entering the common mode.
When the preset temperature threshold range of the zero-cold-water gas water heater in the working process is in a common mode, the preset temperature range is prestored in the controller 6; the preheating temperature threshold range is a preheating temperature range pre-stored in the controller 6 when the cold water gas water heater body 1 is in the preheating mode;
for example, the preset temperature threshold range may be 35-60 deg.C, and the preheating temperature threshold range may be 35 deg.CThe temperature is 50 ℃; when the zero-cold-water gas water heater body is in the preheating mode, the preset temperature T is setPreset ofThe set range of the temperature is 35-50 ℃; when the zero-cold-water gas water heater body exits the preheating mode, the preset temperature T is setPreset ofThe set range of the temperature is restored to 35-60 ℃; therefore, when the user normally uses the zero-cold-water gas water heater, the preset temperature range is wider, and the requirements for adjusting the bathing temperature under different situations are met.
By comparing the return water temperature TReturn waterAnd a predetermined temperature TPreset ofAnd judging whether the zero-cold-water gas water heater completes preheating or not, and when the preset temperature is reached, switching the zero-cold-water gas water heater into a common mode to avoid that the zero-cold-water gas water heater is always in a preheating mode and avoid wasting electric energy and gas.
Another work flow state of a zero cold water gas water heater for limiting the preheating temperature is provided, which comprises the following steps, and the flow chart is shown in fig. 5:
s1, starting a preheating mode of the zero-cold-water gas water heater body 1 by operating the preheating function key 52 of the display module 5, controlling the built-in water pump 2 to operate by the controller 6, controlling the gas control valve 4 to be opened, and enabling the zero-cold-water gas water heater body 1 to enter the preheating mode from a common mode;
s2, the controller 6 records the preset temperature T when the preheating mode of the zero-cold-water gas water heater body 1 is startedPreset ofThe backwater temperature detection module 7 detects the backwater temperature TReturn waterAnd the temperature T of the return waterReturn waterTo the controller 6;
s3, judging the preset temperature TPreset ofWhether or not: t isPreset of＞TPreheating maxWherein T isPreheating maxA maximum preheat temperature within a preheat temperature threshold range; if not, go to S31; if yes, proceed to S32:
s31, the controller 6 receives the return water temperature T sent by the return water temperature detection module 7Return waterAnd judging the backwater temperature TReturn waterWhether or not it is satisfied; t isReturn water＞TPreset of(ii) a If not, go to S311; if yes, go to S312;
s311, the controller 6 controls the zero-cold-water gas water heater body 1 to continuously maintain the preheating mode and preset the temperature TPreset ofThe set range of (1) is a preheating temperature threshold range;
s312, the controller 6 controls the zero-cold-water gas water heater body 1 to exit the preheating mode and controls the preset temperature T of the operation display module 5Preset ofThe set range of the temperature control device is recovered to the preset temperature threshold range from the preheating temperature threshold range, and the temperature control device enters a preheating heat preservation mode;
s3121, after the controller 6 controls the zero-cold-water gas water heater body 1 to be in the preheating and heat-preserving mode, the controller 6 judges the return water temperature T in the preheating and heat-preserving modeReturn waterWhether the temperature is lower than the programmed heat preservation temperature:
if yes, the controller 6 controls the zero-cold-water gas water heater body 1 to be switched into a preheating mode;
if not, the operation display module 5 records the preheating and heat-preserving time t and sends the preheating and heat-preserving time t to the controller 6; after receiving the preheating and heat-preserving time t, the controller 6 judges whether the preheating and heat-preserving time t exceeds the program heat-preserving time: if yes, the controller 6 controls the zero-cold-water gas water heater body 1 to exit the preheating and heat-preserving mode and switch to the common mode; if not, the controller 6 controls the zero-cold-water gas water heater body 1 to maintain the preheating and heat preservation mode.
S32, the controller 6 automatically sets the preset temperature TPreset ofIs reduced to a target preheating temperature TTargetAnd S31 is repeated.
The program heat preservation time is a time pre-stored in the controller 6, for example, in this embodiment, the program heat preservation time may be 20min, may be 30min, and the like.
In the specific working process, the temperature T of the outlet water can be also passedDischarging waterAnd a predetermined temperature TPreset ofThe opening degree of the gas control valve 4 is controlled by a difference value of (a), including:
detect temperature in water temperature detection module 3 and detect zero cold water gas heater body 1 outlet end's play water temperature TDischarging waterAnd the temperature T of the outlet waterDischarging waterTo the controller 6;
the controller 6 receives the outlet water temperature detectionWater temperature T from module 3Discharging waterAccording to the temperature T of the outlet waterDischarging waterAnd a predetermined temperature TPreset ofThe difference value of (3), the opening degree of the gas control valve 4 is controlled;
for example when the temperature T of the outlet waterDischarging waterAnd a predetermined temperature TPreset ofWhen the difference value is large, the controller 6 controls the opening of the gas control valve 4 to increase, so that the firepower is increased, and the temperature rise speed of water stored in the circulating pipeline is increased; when the temperature T of the outlet waterDischarging waterAnd a predetermined temperature TPreset ofWhen the difference is small, the controller 6 controls the opening degree of the gas control valve 4 to be reduced, the firepower is reduced, and the temperature rise speed of the water stored in the circulating pipeline is reduced, so that the outlet water temperature T is reducedDischarging waterAnd a predetermined temperature TPreset ofTo ensure the water outlet temperature TDischarging waterNear the preset temperature TPreset of。
In the specific working process, the step of starting the preheating mode of the zero-cold-water gas water heater body 1 comprises the following steps:
starting a preheating mode of the zero-cold-water gas water heater body 1 through the operation display module 5, and sending information of starting the preheating mode of the zero-cold-water gas water heater body 1 to the controller 6;
after the controller 6 receives the information of the preheating mode started by the zero-cold-water gas water heater body 1 sent by the operation display module 5, the controller 6 controls the built-in water pump 2 to start, controls the gas control valve 4 to open, and then the zero-cold-water gas water heater body 1 enters the preheating mode.
The working process state of the zero-cold-water gas water heater for limiting the preheating temperature is concretely explained, and the method comprises the following steps:
a user starts the preheating mode of the zero-cold-water gas water heater body 1 through the preheating function key 52 and sends the information that the preheating mode of the zero-cold-water gas water heater body 1 is started to the controller 6;
the controller 6 detects the preset temperature TPreset ofReceiving information of a preheating mode started by the zero-cold-water gas water heater body 1 sent by the operation display module 5, and controlling the zero-cold-water gas water heater body 1 to enter the preheating mode according to the received information, namely controlling the built-in water pump 2 to start by the controller 6 and opening the gas control valve 4;
according to the detected preset temperature TPreset ofThe controller 6 judges the preset temperature TPreset ofWhether or not: t isPreset of＞TPreheating maxWherein T isPreheatingMaximum preheating temperature in the range of preheating temperature thresholds, e.g. TPreheatingThe temperature is 50 ℃; when the zero-cold-water gas water heater body 1 is in the preheating mode, the preset temperature TPreset ofBecomes smaller, e.g. the preset temperature TPreset ofThe set range is 35-50 ℃, and the occurrence of the phenomenon caused by the preset temperature T is avoidedPreset ofThe preheating temperature of the water stored in the circulating pipeline is too high;
if not, the controller 6 controls the temperature T according to the preset temperaturePreset ofControlling the preheating temperature of the stored water in the circulating pipeline;
if yes, the controller 6 will automatically preset the temperature T firstPreset ofIs reduced to a target preheating temperature TTargetThen according to the target preheating temperature TTargetControlling the preheating temperature of the stored water in the circulating pipeline and the target preheating temperature TTargetAny temperature value within the range of the preheating temperature threshold value;
wherein the preset temperature T is adjustedPreset ofThe step of setting the range may be:
when the zero-cold-water gas water heater body 1 is in the preheating mode, the return water temperature detection module 7 detects the return water temperature TReturn waterAnd the temperature T of the return waterReturn waterTo the controller 6;
the controller 6 receives the return water temperature TReturn waterAnd judging the return water temperature TReturn waterWhether or not it is satisfied; t isReturn water＞TPreset of；
If not, the controller 6 continues to maintain the preheating mode of the zero-cold-water gas water heater body 1, namely the controller 6 controls the built-in water pump 2 to continue to operate, the gas control valve 4 is opened, and the preheating mode is started according to TDischarging waterAnd TPreset ofThe difference value of (A) controls the opening of the gas control valve 4, controls the temperature rise rate of the water stored in the circulation line, and ensures TDischarging waterApproach to TPreset of；
If yes, the controller 6 controls the zero-cold-water gas water heater body 1 to exit the preheating mode and enterEntering a preheating and heat-preserving mode, namely the controller 6 controls the built-in water pump 2 to be closed, the gas control valve 4 to be closed and controls the preset temperature T of the operation display module 5Preset ofThe preset temperature threshold range is recovered from the preheating temperature threshold range to the preset temperature threshold range, wherein the preset temperature threshold range is the preset temperature range pre-stored in the controller 6 when the zero-cold-water gas water heater body 1 is in the normal mode; and a target preheating temperature TTargetFor example, the preset temperature threshold range in this embodiment may be 35 to 60 ℃, and in order to avoid that the preheating temperature is not too high in the preheating mode, the preheating temperature threshold range may be 35 to 50 ℃.
When the zero-cold-water gas water heater 1 is in the preheating and heat-preserving mode, in this embodiment, it is further determined whether the zero-cold-water gas water heater needs to be switched to the normal mode by determining a relationship between the preheating and heat-preserving time t and the program heat-preserving time, and the steps may be:
when the zero-cold-water gas water heater body 1 enters a preheating and heat-preserving mode, the operation display module 5 starts to record preheating and heat-preserving time t and sends the preheating and heat-preserving time t to the controller 6, the controller 6 receives the preheating and heat-preserving time t and judges whether the hot preheating and heat-preserving time t exceeds the program heat-preserving time, if yes, the zero-cold-water gas water heater body 1 exits the preheating and heat-preserving mode and is switched into a common mode; if not, the preheating and heat preservation mode is continuously maintained. The programmed heat preservation time is the heat preservation time of the gas water heater body 1 with pre-stored zero cold water.
The above description is only for the preferred embodiment of the present invention, but the scope of the present invention is not limited thereto, and any changes or substitutions that can be easily conceived by those skilled in the art within the technical scope of the present invention should be covered by the present invention. Therefore, the protection scope of the present invention shall be subject to the protection scope of the claims.
Claims (4)
1. A zero-cold-water gas water heater capable of limiting preheating temperature is characterized by comprising a zero-cold-water gas water heater body (1), a built-in water pump (2), an outlet water temperature detection module (3), a return water temperature detection module (7), a gas control valve (4), an operation display module (5) and a controller (6);
the water heater is characterized in that the built-in water pump (2) is arranged on a water flow path in the zero-cold-water gas water heater body (1), the water outlet temperature detection module (3) for detecting the temperature of water is arranged at the water outlet end in the zero-cold-water gas water heater body (1), the return water temperature detection module (7) for detecting the return water temperature is arranged at the water inlet end in the zero-cold-water gas water heater body (1), the gas control valve (4) for controlling the on-off and gas flow of gas is arranged on an air inlet pipeline in the zero-cold-water gas water heater body (1), the operation display module (5) for setting the temperature, starting the preheating mode, recording the preheating and heat preservation time and displaying the preset temperature is arranged on the outer side wall of the zero-cold-water gas water heater body (1), and the operation display module (5), the built-in water pump (2), The water outlet temperature detection module (3), the backwater temperature detection module (7) and the gas control valve (4) are electrically connected with the controller (6).
2. The zero-cold-water gas water heater with the preheating temperature limitation as claimed in claim 1, characterized in that the operation display module (5) comprises a temperature setting key (51) for setting the temperature, a preheating function key (52) for starting the preheating mode of the zero-cold-water gas water heater, and a display screen (53) for displaying the preset temperature;
the temperature setting key (51), the preheating function key (52) and the display screen (53) are electrically connected with the controller (6).
3. The zero-cold-water gas water heater of limiting the preheating temperature according to claim 2, characterized in that the temperature setting key (51) comprises a temperature-up key and a temperature-down key.
4. The zero-cold-water gas water heater capable of limiting the preheating temperature according to claim 2, wherein the outlet water temperature detection module (3) is an outlet water temperature detection probe; the return water temperature detection module (7) is a return water temperature detection probe.
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110398055A (en) * | 2019-07-30 | 2019-11-01 | 华帝股份有限公司 | Zero-cold-water gas water heater capable of limiting preheating temperature and control method thereof |
| CN111912114A (en) * | 2020-07-09 | 2020-11-10 | 华帝股份有限公司 | Control method of gas water heater |
| CN113175753A (en) * | 2021-04-30 | 2021-07-27 | 中山百得厨卫有限公司 | Zero-cold-water gas water heater and control method |
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2019
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110398055A (en) * | 2019-07-30 | 2019-11-01 | 华帝股份有限公司 | Zero-cold-water gas water heater capable of limiting preheating temperature and control method thereof |
| CN111912114A (en) * | 2020-07-09 | 2020-11-10 | 华帝股份有限公司 | Control method of gas water heater |
| CN111912114B (en) * | 2020-07-09 | 2023-12-15 | 华帝股份有限公司 | Control method of gas water heater |
| CN113175753A (en) * | 2021-04-30 | 2021-07-27 | 中山百得厨卫有限公司 | Zero-cold-water gas water heater and control method |
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