CN212390610U - Improved constant temperature gas water heater - Google Patents
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- CN212390610U CN212390610U CN202021054154.6U CN202021054154U CN212390610U CN 212390610 U CN212390610 U CN 212390610U CN 202021054154 U CN202021054154 U CN 202021054154U CN 212390610 U CN212390610 U CN 212390610U
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Abstract
An improved constant temperature type gas water heater belongs to the technical field of gas water heaters. The improved constant-temperature gas water heater is additionally provided with an internal water circulation system on the basis of a common gas water heater, and comprises a temperature sensor on a water outlet pipeline of a heat exchanger, a two-position three-way pilot-operated electromagnetic valve, a flow sensor, a pressure sensor, a water outlet, a temperature sensor on a water inlet pipeline of the heat exchanger, a direct-current variable-frequency pump, a two-position three-way pilot-operated electromagnetic valve, a one-way valve and a water inlet. The two-position three-way pilot-operated electromagnetic valves have three positions, and two of the three positions can be controlled to be communicated. The utility model discloses can solve "cold water sandwich", gas heater hardly uses with muddy hydrophone (or constant temperature regulating valve) cooperation, the pipeline slowly leaks for a long time and the short duration "scald the problem of water" after briefly closing tap and opening once more.
Description
Technical Field
The utility model belongs to the technical field of gas heater, put forward the improvement scheme to ordinary thermostatic type gas heater, relate to a modified thermostatic type gas heater, can solve ordinary gas heater "cold water sandwich"'s phenomenon.
Background
The gas water heater is a cold water heating device, and heats cold water by burning natural gas to release heat. The gas water heater is an instant water heater, has the advantages of high heating power and hot water continuity, and is widely applied to a household central hot water supply system at present.
When a water tap is opened in a room, water flow exists in a pipeline, water in a water inlet pipe connected with the gas water heater enters a water-gas linkage device, the device opens a valve under the action of pipeline pressure, outputs a signal to control pulse ignition to start, and simultaneously opens a gas pipeline to realize ignition; cold water flows through the heat exchanger and is heated by flame to be hot water which directly enters a pipeline in a room for a user to use; when a user closes the faucet, the flow in the pipeline is reduced, the switch is reset after the water-gas linkage valve monitors the flow and weakens, and meanwhile, a control signal is output, the gas is cut off, and the heating is stopped. (the utility model discloses a do not consider the circumstances of outage, dry combustion method, water pressure deficiency, jam and other trouble)
However, some existing gas water heaters have the disadvantage of a "cold water sandwich". The cold water sandwich is characterized in that when a user opens a water faucet to be heated and the water temperature is stable, the user closes the water faucet for a short time (within 1 minute), and then opens the water faucet again, hot water temporarily stored in a pipeline flows out firstly, then a section of cold water which is not fully heated is mixed in the middle of the hot water, and then the hot water which is fully heated by a gas water heater flows out. The reason for this is that, after the user momentarily closes the faucet, the gas water heater also stops heating, and because its internal heat exchanger usually adopts oxygen-free copper (heat transfer coefficient is large) material, cold water can be heated rapidly after flowing through the heat exchanger, and the inside temporarily stored hot water also can be cooled rapidly when the heating is stopped. When the gas water heater is ignited again for work, part of stored water in the heat exchanger can not be heated sufficiently in time (or the heating distance of cold water flowing from the pipe does not reach the designed length) and directly flows into an indoor pipeline, so that a user has a cold water section after the user temporarily closes the water faucet and then opens the water faucet. Especially, when a user washes or bathes, the cold water sandwich phenomenon brings strong body feeling discomfort to the user, influences the user experience, and is more serious particularly in winter.
The heating power (gas release combustion amount) of a gas water heater usually ensures that the outlet water temperature is constant according to the flow regulation in a water pipe, a user may need hot water with different temperatures at different times and different places in the daily water use process, and a common gas water heater usually only can keep the outlet water temperature constant by regulating the set temperature, so that the outlet water temperature is difficult to regulate and balance when the user uses water at multiple points in different life scenes (washing, bathing, cooking and the like). In addition, because the gas release amount and the combustion power control accuracy are low, the temperature fluctuation of a common gas water heater is large, and the common gas water heater is difficult to be accurately matched with a water mixer (or a constant temperature regulating valve) for use.
The gas water heater belongs to the center of a household central hot water supply system and plays a role in connecting a household cold water pipe with a household hot water main pipe. When the gas water heater subordinate branch has a slow water leakage fault, the common gas water heater can not cut off the water way to cause continuous water leakage, thereby causing water resource waste and possibly causing other safety problems.
The problem that a common gas water heater is hot after a user temporarily closes a water faucet and then opens the water faucet again is solved, the phenomenon is located before a cold water sandwich phenomenon and is short in time, and the problem is mainly caused by the fact that after the user closes the water faucet, water flow in a pipeline is static, a heating system cannot be timely shut down due to response time (currently, about 2 seconds) and hot water in a heat exchanger is continuously heated. This phenomenon also makes the human body feel uncomfortable.
Most of gas water heaters in the current market have the defects, and partial problems can be solved to a certain extent by partial high-end gas water heaters, but the effect is not very ideal. The utility model discloses improved according to above problem.
SUMMERY OF THE UTILITY MODEL
To the current drawback of gas heater, the utility model provides a can solve "cold water sandwich", use with muddy hydrophone (or thermostatic control valve) cooperation, slightly leak locking outlet valve and briefly close tap and open the back again and appear the solution of the modified thermostatic type gas heater of "boiling water" problem. The utility model discloses gas heater has increased water circulating system in inside on ordinary gas heater's basis.
In order to achieve the purpose, the technical scheme adopted by the application is as follows:
the utility model provides an improved thermostatic type gas heater, can solve present ordinary gas heater and hardly with the problem that the cooperation of constant temperature governing valve was used, increase inside water circulating system on ordinary gas heater's basis, including locating inside heating system, exhaust system, pipeline and circulation system and the control system of gas heater main part. The top of the gas water heater main body is provided with a through hole for the forced draught fan to exhaust, and the bottom of the gas water heater main body is provided with two through holes for communicating with an external water inlet and outlet through a pipeline.
Heating system include the combustion chamber and be located the horizontal anaerobic copper heating coil in the combustion chamber and cloth have burner nozzle's fire row, upper portion in the gas heater main part is located to the combustion chamber, two sides of combustion chamber are equipped with the through-hole for through heat exchanger outlet pipe way, the combustion chamber bottom is equipped with the through-hole and is used for passing through the gas intake pipe, the combustion chamber top is equipped with the through-hole and is used for and strong exhaust fan intercommunication. The oxygen-free copper heating coil is located above the inner portion of the combustion chamber and horizontally arranged, the bottom of the oxygen-free copper heating coil is communicated with the water inlet pipeline, and the top of the oxygen-free copper heating coil is communicated with the water outlet pipeline. The fire grate is positioned below the oxygen-free copper heating coil, and the bottom of the fire grate is connected with a gas inlet pipe 11.
The exhaust system is a forced-draft fan which is positioned inside the gas water heater main body and above the heating box body.
The pipeline and the circulating system comprise a water inlet and outlet pipeline of the heat exchanger, a temperature sensor 1 on the water outlet pipeline, a two-position three-way pilot-operated electromagnetic valve 2 at the water outlet pipe, a flow sensor 3, a pressure sensor 4, a temperature sensor 6 on the water inlet pipeline, a direct-current variable frequency pump 7, a two-position three-way pilot-operated electromagnetic valve 8 at the water inlet pipe and a one-way valve 9. The temperature sensor 1 on the water outlet pipeline is positioned on a water outlet pipeline of the heat exchanger outside the combustion chamber, and the water outlet pipeline of the heat exchanger is communicated with the other two branches after being connected with the two-position three-way pilot-operated electromagnetic valve 2 at the position of the water outlet pipeline: the vertical branch is communicated with a water inlet 5 outside the gas water heater main body, a flow sensor 3 and a pressure sensor 4 are sequentially arranged on the vertical branch, a one-way valve 9 is arranged on the horizontal branch, and the one-way valve 9 is connected with a direct current variable frequency pump 7 through a pipeline. The direct current variable frequency pump 7 is connected with a two-position three-way pilot-operated electromagnetic valve 8 at the water inlet pipe. The temperature sensor 6 on the water inlet pipeline be located the outer heat exchanger inlet pipe way of combustion chamber, the heat exchanger inlet pipe way is connected the back with two tee bend pilot-operated solenoid valve 8 of inlet tube department, with two other branch roads intercommunication: the vertical branch is communicated with a water outlet 10 outside the gas water heater main body, and the horizontal branch is communicated with a direct-current variable frequency pump 7.
The control system comprises a Central Processing Unit (CPU) which is used for receiving various sensor signals and sending out intelligent control instructions.
The circulation system can solve the problem of continuous leakage of a very small amount of hot water pipelines: when the central control unit detects that the numerical variation rate of the pipeline flow and the pipeline pressure is low according to the flow sensor 3 and the pressure sensor 4, the two-position three-way pilot-operated electromagnetic valve 2 at the water outlet pipe and the two-position three-way pilot-operated electromagnetic valve 8 at the water inlet pipe are both controlled to be positioned at an ac end (the end of the valve 2a is a normal opening, the end b is a water outlet, the end c is a bypass port, the end 8a of the valve 8a is a bypass port (communicated with the bypass port at the end c of the valve 2 through a direct-current variable-frequency pump 7), the end b is a water inlet, and the end c is a normal opening) to be communicated, a heating system. The problem that the ordinary gas water heater is hot after a user temporarily closes the water tap and then reopens can be solved: the two-position three-way pilot-operated type electromagnetic valve 2 at the water outlet pipe and the two-position three-way pilot-operated type electromagnetic valve 8 at the water inlet pipe are used for controlling water circulation, so that the direction of pipeline water flow can be switched in a short time, and the phenomenon that the gas water heater excessively heats water stored in the heat exchanger due to response time factors to cause 'hot water' can be effectively avoided.
Furthermore, the response time of the two-position three-way pilot-operated electromagnetic valve 2 at the water outlet pipe, the two-position three-way pilot-operated electromagnetic valve 8 at the water inlet pipe, the flow sensor 3, the pressure sensor 4, the direct-current variable frequency pump 7, the one-way valve 9 and the control system is 10-2-10-1And the accuracy of the sensor element is 0.5% -2%, and the system is controlled by a control program.
Improved thermostatic type gas heater increases inside water circulating system on ordinary gas heater's basis, two tee bend guide solenoid valve 2, flow sensor 3 including temperature sensor 1 on the outlet pipe way, outlet pipe department, pressure sensor 4, delivery port 5, the two tee bend guide solenoid valve 8, check valve 9, water inlet 10, the gas of temperature sensor 6 on the inlet pipe way, direct current inverter pump 7, inlet tube department admit air 11. The two-position three-way pilot-operated electromagnetic valve 2 at the water outlet pipe and the two-position three-way pilot-operated electromagnetic valve 8 at the water inlet pipe respectively have three positions, and two positions of the three positions can be controlled to be communicated. When a user faucet is closed for a short time, the work of the water circulation system in the improved system ensures that the heating system keeps working, and the problem of a cold water sandwich of the common gas water heater can be solved by controlling the locking rate of the two-position three-way pilot type electromagnetic valve 2 at the water outlet pipe and the two-position three-way pilot type electromagnetic valve 8 at the water inlet pipe and the action of the variable frequency pump.
The utility model has the advantages that: (1) most of the existing gas water heaters cannot realize a real constant temperature effect, and the improved constant temperature type gas water heater solves the problem that the user experience is influenced by a cold water sandwich to the greatest extent; (2) the improved constant-temperature gas water heater solves the problem that most gas water heaters are difficult to be matched with a water mixer (or a constant-temperature regulating valve) for use; (3) the improved thermostatic gas water heater solves the problem that the water tap slowly leaks when the thermostatic gas water heater is out of service for a long time; (4) the improved thermostatic gas water heater solves the problem that the water tap is temporarily closed and then is re-opened to scald water.
Drawings
FIG. 1 is a schematic diagram of the internal structure of an improved thermostatic gas water heater;
in the figure: 1 temperature sensor on the water outlet pipeline; 2 two-position three-way pilot-operated electromagnetic valve at the water outlet pipe; 3 a flow sensor; 4 a pressure sensor; 5, water outlet; 6 a temperature sensor on the water inlet pipeline; 7, a direct-current variable frequency pump; 8, a two-position three-way pilot-operated electromagnetic valve at the water inlet pipe; 9 a one-way valve; 10, a water inlet; 11 gas inlet pipe.
Detailed Description
The present invention will be described with reference to fig. 1.
The utility model provides an improved thermostatic type gas heater, including gas heater main part and the heating system, exhaust system, pipeline and the circulating system and the control system that are located the main part inside. The top of the gas water heater main body is provided with a through hole for the forced draught fan to exhaust, and the bottom of the gas water heater main body is provided with two through holes for communicating with an external water inlet and outlet through a pipeline.
Heating system include the combustion chamber and be located the horizontal anaerobic copper heating coil in the combustion chamber and cloth have burner nozzle's fire row, upper portion in the gas heater main part is located to the combustion chamber, two sides of combustion chamber are equipped with the through-hole for through heat exchanger outlet pipe way, the combustion chamber bottom is equipped with the through-hole and is used for passing through the gas intake pipe, the combustion chamber top is equipped with the through-hole and is used for and strong exhaust fan intercommunication. The oxygen-free copper heating coil is located above the inner portion of the combustion chamber and horizontally arranged, the bottom of the oxygen-free copper heating coil is communicated with the water inlet pipeline, and the top of the oxygen-free copper heating coil is communicated with the water outlet pipeline. The fire grate is positioned below the oxygen-free copper heating coil, and the bottom of the fire grate is connected with a gas inlet pipe 11.
The exhaust system is a forced-ventilated fan, the forced-ventilated fan is positioned in the gas water heater main body and above the heating box body, and the forced-ventilated fan and the heating system form a combustion chamber.
The pipeline and the circulating system comprise a water inlet and outlet pipeline of the heat exchanger, a temperature sensor 1 on the water outlet pipeline, a two-position three-way pilot-operated electromagnetic valve 2 at the water outlet pipe, a flow sensor 3, a pressure sensor 4, a temperature sensor 6 on the water inlet pipeline, a direct-current variable frequency pump 7, a two-position three-way pilot-operated electromagnetic valve 8 at the water inlet pipe and a one-way valve 9. The temperature sensor 1 on the water outlet pipeline is positioned on a water outlet pipeline of the heat exchanger outside the combustion chamber, and the water outlet pipeline of the heat exchanger is communicated with the other two branches after being connected with the two-position three-way pilot-operated electromagnetic valve 2 at the position of the water outlet pipeline: the vertical branch is communicated with a water inlet 5 outside the gas water heater main body, a flow sensor 3 and a pressure sensor 4 are sequentially arranged on the vertical branch, a one-way valve 9 is arranged on the horizontal branch, and the one-way valve 9 is connected with a direct current variable frequency pump 7 through a pipeline. The direct current variable frequency pump 7 is connected with a two-position three-way pilot-operated electromagnetic valve 8 at the water inlet pipe. The temperature sensor 6 on the water inlet pipeline be located the outer heat exchanger inlet pipe way of combustion chamber, the heat exchanger inlet pipe way is connected the back with two tee bend pilot-operated solenoid valve 8 of inlet tube department, with two other branch roads intercommunication: the vertical branch is communicated with a water outlet 10 outside the gas water heater main body, and the horizontal branch is communicated with a direct-current variable frequency pump 7.
The control system comprises a Central Processing Unit (CPU) which is used for receiving various sensor signals and sending out intelligent control instructions. As shown in fig. 1, an improved thermostatic gas water heater is additionally provided with a two-position three-way pilot electromagnetic valve 2 at a water outlet pipe, a direct-current variable frequency pump 7, a one-way valve 9 and a two-position three-way pilot electromagnetic valve 8 at a water inlet pipe on the basis of a common gas water heater. The utility model discloses specific embodiment explains according to several beneficial effect classifications:
at first, the gas water heater is in a cold machine state, the 2ab end of the two-position three-way pilot-operated electromagnetic valve at the water outlet pipe is communicated, and the 8bc end of the two-position three-way pilot-operated electromagnetic valve at the water inlet pipe is communicated. When a user turns on the faucet, the flow sensor 3 and the pressure sensor 4 respectively detect the flow and pressure changes in the pipeline, the measurement signals are converted into electric signals to be transmitted to a central processing unit (not shown), the control system sends out control instructions to start the water-gas linkage device, start the pulse ignition device, start fuel gas and ignite, and provide hot water for the user. When a user closes the water faucet for a short time (the time can be set), the water pressure in the pipeline rises, the flow is reduced, the flow sensor 3 and the pressure sensor 4 transmit continuously changing signals to the central processing unit, when the flow is smaller than a calibration value and the pressure is larger than the calibration value, the central processing unit sends signals to connect the ac end of the two-position three-way pilot type electromagnetic valve 2 at the water outlet pipe, start the direct-current variable-frequency pump 7 and connect the ac end of the two-position three-way pilot type electromagnetic valve 8 at the water inlet pipe, heated hot water circulates in the gas water heater at the moment, and the direct-current variable-frequency pump 7 adjusts the flow to ensure that the water temperature in. The inlet water is mixed by cold water and hot water, and the central control unit reduces the gas quantity and reduces the heating power. When the user opens the faucet again within the set time, the flow sensor 3, the pressure sensor 4 and the central control unit regulate the two-position three-way pilot-operated electromagnetic valve 2 at the water outlet pipe, the direct-current variable frequency pump 7 and the two-position three-way pilot-operated electromagnetic valve 8 at the water inlet pipe, and the situation that the user has no cold water sandwich phenomenon in the process of continuously using hot water is guaranteed.
The utility model discloses adopted when guaranteeing that gas heater does not have "cold water sandwich" problem two tee bend pilot operated solenoid valve 2 of outlet pipe department and two tee bend pilot operated solenoid valve 8 of inlet tube department, this solenoid valve belongs to the pilot operated solenoid valve of variable case aperture, can also pass through pilot valve restriction main valve core stroke promptly in the control water route break-make to the accurate change of flow of the three interface of control abc end realizes b end and c end 0% -100% water yield. Compared with the common gas water heater, the function is realized mainly by keeping the heating power of the gas water heater unchanged along with the change of the hot water demand of a user. The user can set a highest temperature for the gas water heater according to daily requirements, at the moment, when the user uses hot water with the temperature, the ends c and b of the two-position three-way pilot-operated electromagnetic valve 2 at the water outlet pipe and the two-position three-way pilot-operated electromagnetic valve 8 at the water inlet pipe are locked by 100%, and the heated water in the gas water heater is completely used by the user. When a user needs hot water with lower temperature at other water consumption points (a water mixer is usually arranged at the water consumption points), the user adjusts the mixing proportion of the hot water and the cold water through the water mixer to obtain target water temperature, in the process of adjusting the water mixer by the user, the water outlet flow of the gas water heater is continuously changed, and the central control unit controls the two-position three-way pilot type electromagnetic valve 2 at the water outlet pipe, the locking rates of the b end and the c end of the two-position three-way pilot type electromagnetic valve 8 at the water inlet pipe and the circulating flow controlled by the direct current variable frequency pump 7 to ensure that the total main line flow inside the gas water heater is constant, so that the heating power and the water outlet temperature of the gas water heater are unchanged while the hot water flow is adjusted by the user terminal, and.
According to the working principle, the utility model discloses can also solve present ordinary gas heater hardly with the problem that the constant temperature regulating valve cooperation was used.
Furthermore, the utility model discloses the problem that the hot-water line lasts the seepage very little has still been solved. When the central control unit detects that the numerical value change rate of the pipeline flow and the pipeline pressure is low according to the flow sensor 3 and the pressure sensor 4, the pilot-operated solenoid valve 2 and the two-position three-way pilot-operated solenoid valve 8 at the water inlet pipe are both communicated at the ac end, the heating system does not work, and the situation that the pipeline slowly leaks water can be effectively avoided.
And simultaneously, the utility model discloses still solved ordinary gas heater and closed tap the problem that "scald water" appears after reopening at the user's short time. The utility model discloses a two tee bend guide solenoid valve 2 of outlet pipe department and 8 control water circulation of two tee bend guide solenoid valve of inlet tube department can switch pipeline rivers directions in the short time, can effectively avoid gas heater to lead to the phenomenon of "scalding water" because of the excessive heating of depositing water in heating system response time factor to the heat exchanger.
The utility model discloses above function needs to be established and is realized under the accurate control logic of central control unit.
The above-mentioned embodiments only represent the embodiments of the present invention, but can not be understood as the limitation of the scope of the present invention, and it should be noted that, for those skilled in the art, a plurality of variations and improvements can be made without departing from the concept of the present invention, and all of them belong to the protection scope of the present invention.
Claims (2)
1. An improved thermostatic gas water heater is additionally provided with an internal water circulation system on the basis of a common gas water heater and is characterized by comprising a heating system, an exhaust system, a pipeline, a circulation system and a control system which are arranged in a main body of the gas water heater; the top of the gas water heater main body is provided with a through hole for communicating the exhaust system with the outside, and the bottom of the gas water heater main body is provided with two through holes for communicating with an external water inlet and outlet through a pipeline;
the heating system comprises a combustion chamber, a transverse oxygen-free copper heating coil and a fire grate with combustion nozzles, wherein the transverse oxygen-free copper heating coil is positioned in the combustion chamber, the combustion chamber is arranged at the middle upper part of the main body of the gas water heater, through holes on two sides of the combustion chamber are used for passing through a water outlet pipeline of a heat exchanger, a through hole at the bottom of the combustion chamber is used for passing through a gas inlet pipe, and a through hole at the top of the combustion chamber; the oxygen-free copper heating coil is positioned above the inner part of the combustion chamber and is communicated with the water inlet and outlet pipeline; the fire grate is positioned below the oxygen-free copper heating coil and is connected with a gas inlet pipe (11);
the exhaust system is an exhaust fan which is positioned above the heating box body;
the pipeline and the circulating system comprise a water inlet and outlet pipeline of the heat exchanger, a temperature sensor (1) on the water outlet pipeline, a two-position three-way pilot-operated electromagnetic valve (2) at the water outlet pipeline, a flow sensor (3), a pressure sensor (4), a temperature sensor (6) on the water inlet pipeline, a direct-current variable frequency pump (7), a two-position three-way pilot-operated electromagnetic valve (8) at the water inlet pipeline and a one-way valve (9); the temperature sensor (1) on the water outlet pipeline is positioned on a water outlet pipeline of the heat exchanger outside the combustion chamber, and the water outlet pipeline of the heat exchanger is communicated with the other two branches after being connected with the two-position three-way pilot-operated electromagnetic valve (2) at the water outlet pipeline: the vertical branch is communicated with a water inlet (5) outside the gas water heater main body, a flow sensor (3) and a pressure sensor (4) are sequentially arranged on the vertical branch, a one-way valve (9) is arranged on the horizontal branch, and the one-way valve (9) is connected with a direct-current variable-frequency pump (7) through a pipeline; temperature sensor (6) on the water intake pipe are located the heat exchanger inlet tube way outside the combustion chamber, and the heat exchanger inlet tube way is connected the back with two tee bend pilot-operated solenoid valve (8) of inlet tube department, with two other branch roads intercommunication: the vertical branch is communicated with a water outlet (10) outside the gas water heater main body, and the horizontal branch is communicated with a direct-current variable frequency pump (7);
the control system is used for receiving signals of various sensors and sending out intelligent control instructions to control the on-off and locking rate of the two-position three-way pilot-operated electromagnetic valve (2) at the water outlet pipe and the two-position three-way pilot-operated electromagnetic valve (8) at the water inlet pipe.
2. An improved thermostatic gas water heater according to claim 1, characterized in that the response time of the two-position three-way pilot electromagnetic valve (2) at the outlet pipe, the two-position three-way pilot electromagnetic valve (8) at the inlet pipe, the flow sensor (3), the pressure sensor (4), the direct current variable frequency pump (7), the check valve (9) and the control system is 10-2-10-1The accuracy of the sensor element is 0.5-2% in seconds.
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| CN111550917A (en) * | 2020-06-10 | 2020-08-18 | 大连理工大学 | Improved constant temperature gas water heater |
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