A kind of gas heater central hot water circulation systemTechnical field
The present invention relates to gas heater technical field, more particularly to a kind of gas heater central hot water circulation system.
Background technology
The hot water circulating device of prior art when installing without water return pipeline, more installed in the water inlet end of water heater, in heatWater pipe installs a check valve with the distalmost end of cold water pipe, and hot-water line and cold water are coupled together to form a loop, and work is formerReason there are about following two：
1) user presses pre- hot key, and the water pump in EGR is started working.Water heater detects water-flow signal and starts combustionBurn, EGR detects water pump when water temperature reaches the preheating temperature of user's setting and quits work, and this preheating is completed, and is now openedHot water tap is carved with hot water stream and is gone out.
2) user voluntarily sets the preheating time long t of hot water circulating device according to length of pipe and situation, opens in userWhen opening EGR preheating function, water pump is started working in hot water circulating device, the t of working time a length of setting, operating time tLater, water pump quits work, and this preheating is completed, and now opens hot water tap and be carved with hot water stream.
At present the hot water circulating device of technology has following defect：
1) because hot water circulating device is arranged on the water inlet end of water heater, during using temperature decision condition, EGR is worked asTemperature also not up to the preheating temperature value of setting when, the temperature at water outlet of water heater end considerably beyond pre- heat setting temperature,Cause temperature overtemperature in hot-water line serious, and without mixed water, user's bathing after the completion of preheating can not be realized under return pipe stateThere is the danger scalded.
2) it is hot water in cold water pipe after the completion of preheating, not only wastes gas, electricity, and with cold water meeting after field has been preheatedThere is one section of hot water to flow out, affect user to use cold water.
3) the preheating time length required for different user difference pipeline situation is different, in installation process user with after salePersonnel need to debug repeatedly, and installation and debugging workload is big.
4) in installation process, EGR is arranged on water feeding of heater end, not only needs the pipe to distalmost end water spotRoad carries out improvement and installation check valve, but also water feeding of heater end water route is transformed, and workload is larger.
The content of the invention
For problems of the prior art, it is an object of the invention to provide a kind of mounting structure is simple, preheatedCheng Houneng meets instant-heating and opens i.e. cold gas heater central hot water circulation system simultaneously.
To reach object above, the present invention is adopted the following technical scheme that.
A kind of gas heater central hot water circulation system, including：Gas heater, is connected to entering on gas heaterCold water pipe, hot-water outlet pipe, some use water spots being connected on hot-water outlet pipe, and be connected to each water spot and enter between cold water pipeCold water arm；Characterized in that, connector hot water circuit between the hot-water outlet pipe and cold water arm at distalmost end water spotDevice；The hot water circulating device includes：Connecting line, the check valve being serially connected on connecting line, water circulating pump and temperature are passedSensor, and the controller being connected with water circulating pump and temperature sensor control；The water inlet end of connecting line connects with hot-water outlet pipeConnect, the water side of connecting line is connected with cold water arm.
Used as with improvement, the controller is the master controller of gas heater.
Used as with improvement, the controller is to be arranged in hot water circulating device and the communication of gas heater master controllerDiscrete controller.
As with improvement, preheating temperature is set by controller, in warm, by the temperature in hot water circulating deviceDegree sensor real-time monitoring water temperature；When hot water circulating device detects water temperature more than the preheating temperature for setting, controller controlWater pump in EGR quits work.
As with improvement, preheating time section is set by controller, in preheating time section, when real-time water temperature is less than settingDuring a certain return difference temperature of temperature, the water pump in hot water circulating device is started working, and gas heater detects water-flow signal and startsWork and heat in the water in pipeline.
Used as with improvement, the span of the return difference temperature is 0-15 DEG C
The invention has the beneficial effects as follows：
The first, hot water circulating device is arranged on the distalmost end of hot-water outlet pipe and cold water arm, is solved installed in water inlet endThe problem of the temperature overshot of presence, it is ensured that it is cold water in hot water, cold water pipe that hot-water line is after the completion of subscription time section and preheating, fullAlso meet while foot instant-heating and open i.e. cold.
2nd, due to being integrated with the devices such as temperature sensor, circulating pump in hot water circulating device, only user's distalmost end need to be transformedWater spot pipeline is used, the workload that EGR is installed is reduced.
Description of the drawings
Fig. 1 show the gas heater central hot water circulation system structural representation of present invention offer.
Fig. 2 show hot water circulating device structural representation.
Fig. 3 show the gas heater central hot water circulation system workflow diagram of present invention offer.
Description of reference numerals：
1：Gas heater, 2：Enter cold water pipe, 3：Hot-water outlet pipe, 4：With water spot, 5：Cold water arm, 6：Hot water circuit is filledPut.
6-1：Connecting line, 6-2：Check valve, 6-3：Water circulating pump, 6-4：Temperature sensor, 6-5：Controller.
Specific embodiment
For convenience of the essence that those skilled in the art more fully understand the present invention, below in conjunction with the accompanying drawings to the concrete of the present inventionEmbodiment is described in detail.
As shown in figure 1, a kind of gas heater central hot water circulation system, including：Gas heater 1, is connected to combustion gasEnter cold water pipe 2, hot-water outlet pipe 3 on water heater 1, some use water spots 4 being connected on hot-water outlet pipe 3, and it is connected to each useWater spot 4 and the cold water arm 5 entered between cold water pipe 2；Characterized in that, the hot-water outlet pipe 3 and cold water at distalmost end water spotConnector hot water circulating device 6 between arm 5.
As shown in Fig. 2 the hot water circulating device 6 includes：Connecting line 6-1, is serially connected in unidirectional on connecting line 6-1Valve 6-2, water circulating pump 6-3 and temperature sensor 6-4, and the control being connected with water circulating pump 6-3 and temperature sensor 6-4 controlsDevice 6-5 processed.During actual installation, the water inlet end of connecting line 6-1 is connected with hot-water outlet pipe, the water side of connecting line 6-2 with it is coldWater arm connects, and in the presence of check valve 6-2, makes current from hot-water outlet pipe 3 to the one-way conduction of cold water arm 5.
In the present embodiment, the controller 6-5 is the master controller of gas heater, controller 6-5 and water circulating pump 6-3Using wirelessly connecting and temperature sensor 6-4 between, to simplify product structure.It is as specific radio connectionKnown technology, repeats no more here.In other embodiments, the controller is to be arranged in hot water circulating device and combustion gasThe discrete controller of water heater master controller communication, is not limited to the present embodiment.
As shown in figure 3, during practical application, by controller preheating temperature and preheating time section are set.Open before user's bathingEGR preheating function is opened, the water pump in EGR is started working, water heater detects water-flow signal and starts ignition.
In warm, by the temperature sensor real-time monitoring water temperature in hot water circulating device；When hot water circuit dressPut and detect preheating temperature T of the water temperature T more than settingIfWhen, the water pump in controller control EGR quits work.This isHeat into.Ensure that the water in hot-water outlet pipe is hot water, and the water in cold water arm is cold water.
In preheating time section, when real-time water temperature T is less than design temperature TIfA certain return difference temperature TReturnWhen, i.e. T ＜ TIf-TReturnWhen, the water pump in hot water circulating device is started working, and gas heater detects water-flow signal and starts working the water in pipelineHeating, makes the water water temperature in subscription time section interior conduit maintain TIf-TReturn～TIfBetween.As for the concrete value of return difference temperature,Can arbitrarily select in the range of 0-15 DEG C as needed.
A kind of gas heater central hot water circulation system that the present embodiment is provided, by hot water circulating device heat is arranged on outWater pipe and the distalmost end of cold water arm, solve the problems, such as the temperature overshot existed installed in water inlet end, it is ensured that subscription time sectionIt is hot water with hot-water line after the completion of preheating, it is cold water that cold water pipe is interior, also meets while meeting instant-heating and opens i.e. cold.Simultaneously as being integrated with the devices such as temperature sensor, circulating pump in hot water circulating device, only user's distalmost end water spot need to be transformedPipeline, reduces the workload that EGR is installed.
Above specific embodiment has been described in detail to the essence of the present invention, but can not be come to the present invention's with thisProtection domain is limited.It should be evident that under the enlightenment of essence of the invention, the art those of ordinary skill can also enterThe many improvement of row and modification, it should be noted that these improve and modification all fall the present invention claims itIt is interior.