Water heater
Technical field
The present invention relates to water heater, particularly relate to electric water heater.
Background technology
Water heater has been that furniture is electrically indispensable, and water heater has gas water heater usually, electric heater, solar water heater etc.
The mode of heating of water heater and electric heater is instant heating, and namely user needs just to start to heat up water when using hot water.
The heater switch of water heater normally judges according to the water velocity of hot-water line, and when water velocity reaches predetermined threshold value, meeting trigger switch, opens heating function.
In use, in water heater, tap all can have a segment distance, after each user's closed tap, water between hot-water line to water heater or heat, cause the waste of hot water, and if now open tap release the inside hot water, water heater can restart again heating function, this section of hot water always exists, and causes the waste of the energy.
Summary of the invention
Based on this, be necessary to provide a kind of energy-saving water heater.
A kind of water heater, comprising: water inlet pipe, water flow switch, heater, outlet pipe and time delay module,
Described water inlet pipe, described heater are communicated with successively with described outlet pipe, and described water flow switch is connected with described water inlet pipe and described heater, and described time delay module is connected with described water flow switch;
Described heater is used for the heating of water;
Described water flow switch is used for when water flow velocity reaches predetermined threshold value, starts described heater, during lower than predetermined threshold value, closes described heater;
Described time delay module is used for starting timing when described water flow switch closing motion, when described water flow switch opening action, resets;
Described water flow switch be used for after closedown, water flow velocity reach predetermined threshold value and described time delay module timing reaches Preset Time time, start described heater.
In one of them embodiment, described Preset Time is 2 seconds.
In one of them embodiment, described water inlet pipe is used for being communicated with running water pipe.
In one of them embodiment, described outlet pipe is used for being communicated with tap.
So, just define the time interval arriving startup next time after water heater is closed at every turn, user in the process of putting hot water, closed tap, tap of then fetching boiling water immediately, therefore this time difference does not reach Preset Time, at this moment water flow switch can not start heater, and has discharged hot water residual in pipeline, also would not waste hot water, Comparatively speaking, also just more economize energy.
Accompanying drawing explanation
Fig. 1 is the functional block diagram of the water heater of an embodiment.
Detailed description of the invention
As shown in Figure 1, it is the functional block diagram of the water heater 10 of an embodiment, comprising: water inlet pipe 101, water flow switch 102, heater 103, outlet pipe 104 and time delay module 105.
Water inlet pipe 101, heater 103 are communicated with successively with outlet pipe 104, and water flow switch 102 is connected with water inlet pipe 101 and heater 103.Described time delay module 105 is connected with water flow switch 102.
Described water inlet pipe 101 is for being communicated with running water pipe.
Described outlet pipe 104 is for being communicated with tap.
Described heater 103 is for the heating of water, and it can be gas-fired heating, also can be electric heating.
Described water flow switch 102, for when water flow velocity reaches predetermined threshold value, starts described heater 103, during lower than predetermined threshold value, closes described heater 103.
Described time delay module 105, for starting timing when described water flow switch 102 closing motion, when described water flow switch 102 opening action, resets.
Described water flow switch 102 also for after closedown, water flow velocity reach predetermined threshold value and described time delay module 105 timing reaches Preset Time time, start described heater 103.
In the present embodiment, described Preset Time is 2 seconds.
So, just define after water heater 10 is closed at every turn and arrive the next time interval started, user in the process of putting hot water, closed tap, tap of then fetching boiling water immediately, therefore this time difference does not reach Preset Time, at this moment water flow switch 102 can not start heater 103, and has discharged hot water residual in pipeline, also would not waste hot water, Comparatively speaking, also just more economize energy.
In other embodiments, described water flow switch 102 also can change into and being connected on outlet pipe 104.
The above embodiment only have expressed several embodiment of the present invention, and it describes comparatively concrete and detailed, but therefore can not be interpreted as the restriction to the scope of the claims of the present invention.It should be pointed out that for the person of ordinary skill of the art, without departing from the inventive concept of the premise, can also make some distortion and improvement, these all belong to protection scope of the present invention.Therefore, the protection domain of patent of the present invention should be as the criterion with claims.