CN218864473U - Heating stove with function of preventing frostbite - Google Patents

Abstract

The utility model provides a heating stove with function of preventing frostbite, including controller, combustor, heat exchanger and with the heating outlet pipe and the heating wet return of heat exchanger intercommunication, the heating outlet pipe communicates with the circulation pipeline's of heating equipment end of intaking, be provided with return water temperature sensor on the heating wet return, return water temperature sensor with the built-in frostproofing control module of controller is connected, is used for after the combustor stops working according to return water temperature control that return water temperature sensor detected the combustor burns anew.

Description

Heating stove with function of preventing frostbite

Technical Field

The utility model belongs to the technical field of the heating stove technique and specifically relates to a heating stove with function of preventing frostbite.

Background

The gas heating furnace is a new energy-saving environment-friendly product, occupies the domestic heating market gradually due to the advantages of small floor area, less pollution, low cost, no garbage combustion, easy control of heating temperature and the like, and has a high market share. Among the prior art, gas heating stove uses the gas as the energy source, burns in the combustion chamber at the gas to water is heat transfer medium, through circulation pipeline intercommunication between heat exchange water tank and the heating installation, under the effect of water pump, the heat transfer medium-circulation flow between water heat exchange water tank and the heating installation, gives the heating installation with the heat transfer that gas burning produced.

The heating stove is in normal use, and after reaching the settlement temperature, the heating stove can shut down, and the gas valve is closed, and the combustor stops fiery. Because the tobacco pipe of heating stove leads to outdoor environment, in the strong wind season, the heating stove is shut down the back, and outside cold air enters into inside the heating stove air chamber through the tobacco pipe under the effect of strong wind. Since the inside of the air chamber is closed, the temperature inside the air chamber is rapidly lowered, and there is a possibility that a heating return pipe located in the air chamber is frozen. When the temperature of heating outlet water is reduced to the temperature for starting the heating furnace by igniting again, the ice is frozen by a client of the air chamber section of heating return water, and the ice is rapidly vaporized by heat generated after the burner works, so that safety accidents are caused.

In order to avoid vaporization accidents caused by the fact that a heating water return pipe in an air chamber is frozen due to air backflow and the air is restarted, the most direct and effective method is to perform anti-freezing protection on the heating furnace.

SUMMERY OF THE UTILITY MODEL

The utility model discloses main aim at solves above-mentioned problem and not enough, provides a heating stove with function of preventing frostbite, and through detecting return water temperature, control off-state's heating stove gets into frostproofing control mode, prevents that the phenomenon from freezing in the indoor heating wet return from appearing, avoids appearing the vaporization accident that the heating stove produced after the reworking.

In order to achieve the purpose, the utility model provides a heating stove with function of preventing frostbite, its technical scheme is:

the utility model provides a heating stove with function of preventing frostbite, including controller, combustor, heat exchanger and with heating outlet pipe and the heating wet return of heat exchanger intercommunication, the heating outlet pipe communicates with the end of intaking of the circulation pipeline of heating equipment, be provided with return water temperature sensor on the heating wet return, return water temperature sensor with the built-in frostproofing control module of controller is connected, is used for behind the combustor stop work according to return water temperature control that return water temperature sensor detected the combustor burns again.

Further, a heating control module is preset in the controller, an outlet water temperature sensor connected with the heating control module is arranged on the heating outlet pipe, a heating temperature limit value is arranged in the heating control module, and the heating control module is used for controlling the work of the burner according to the corresponding relation between the outlet water temperature detected by the outlet water temperature sensor and the heating temperature limit value interval.

Furthermore, the heating system also comprises a heating temperature switch for controlling the heating furnace to enter a heating state.

Furthermore, the water outlet end of the heating water return pipe is connected with the heat exchanger, the water inlet end of the heating water return pipe is connected with the water outlet of the water pump, and the water inlet of the water pump is communicated with the water outlet end of the circulating pipeline.

Further, the water pump includes an exhaust.

Furthermore, a pressure relief valve is arranged on the water pump.

Further, still include the setting in combustor top fan.

Furthermore, the return water temperature sensor is arranged at the water outlet end of the heating return water pipe.

Further, the backwater temperature sensor is arranged inside the air chamber.

Further, the anti-freezing control module controls the gas valve to be opened at a minimum angle when controlling the combustor to reburn according to the return water temperature. .

To sum up, the utility model provides a pair of heating stove with function of preventing frostbite compares with prior art, has following advantage:

1. the return water temperature sensor is arranged at the water outlet end of the heating return water pipe, so that the collection of the return water temperature is not influenced by no deviation or small deviation, the anti-freezing control is more direct, the judgment error is reduced, the return water temperature sensor is further arranged in the air chamber, the return water temperature and the air chamber temperature can be considered at the same time, and the problem that the circulating water in the heating return water pipe is frozen due to the fact that the air chamber temperature is too low is further avoided;

2. by arranging the water pressure sensor fault state detection module, dry burning prevention is controlled through return water temperature after the water pressure sensor fails, so that the control is more accurate, and misjudgment is further reduced;

3. the water pump is connected with the heating water return pipe, so that the temperature sensor and the heating temperature switch at the connection of the heating water outlet pipe cannot sense the highest temperature, the vaporization problem is serious, the heat exchanger and the fan are finally burnt, and the problem can be perfectly solved by adding the return water temperature sensor at the heating water return pipe;

4. the structure is simple, only one return water temperature sensor needs to be added, the structural change of the existing product is not needed, and the improvement cost is low.

Description of the drawings:

FIG. 1: the utility model provides a schematic structural diagram of a heating furnace with an anti-freezing function;

FIG. 2: the utility model provides a heating stove anti-dry heating control logic diagram with anti-freezing function;

the heating water heater comprises a shell 1, a fan 2, a heating temperature switch 3, a heating water outlet pipe 4, a water outlet temperature sensor 5, a gas valve 6, a water pump 7, a water pressure sensor 8, a return water temperature sensor 9, a combustor 10, a heating return water pipe 11, a combustion chamber 12, a heat exchanger 13, a partition plate 14, a bottom plate 15 and an air chamber 16.

Detailed Description

The present invention will be described in further detail with reference to the accompanying drawings and specific embodiments.

In order to make the objects, technical solutions and advantages of the present invention more clearly understood, the present invention is further described in detail below with reference to the accompanying drawings and 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.

In the description of the present invention, it should be noted that the terms "upper", "lower", "front", "rear", "left", "right", "inner", "outer", "top", "bottom", and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience of description and simplification of description, but do not indicate or imply that the device or element referred to must have a specific orientation, be constructed in a specific orientation, and be operated, and thus, should not be construed as limiting the present invention.

In the description of the present invention, it is to be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally connected; the connection can be mechanical connection, electrical connection or signal connection; may be directly connected or indirectly connected through an intermediate. The specific meaning of the above terms in the present invention can be understood in specific cases to those skilled in the art.

The utility model provides a heating stove with function of preventing frostbite, including the controller, combustor 10, heat exchanger 13 and with heating outlet pipe 5 and the heating wet return 11 of heat exchanger 13 intercommunication, heating outlet pipe 5 communicates with the circulation pipeline's of heating equipment the end of intaking, is provided with return water temperature sensor 9 on the heating wet return 11, return water temperature sensor 9 is connected with the built-in frostproofing control module of controller, the frostproofing control module is used for burning again according to return water temperature control combustor 10 that return water temperature sensor 9 detected after combustor 10 stop work.

As shown in fig. 1, the utility model provides a pair of heating stove with function of preventing frostbite, including casing 1, be provided with baffle 14 in the casing 1, with separating upper and lower two-layer space in the casing 1, set up the mount pad on casing 1 bottom plate 15, water pump 7 is fixed in one side of mount pad, still is fixed with gas valve 6 on the mount pad, and the import and the outer gas house steward intercommunication of casing 1 of gas valve 6 export and combustor 10 intercommunication. The burner 10 is assembled and fixed to a partition 14, a combustion chamber 12 is provided above the partition 14, and a heat exchanger 13 is provided in the combustion chamber 12. The burner 10 is inserted into the combustion chamber 12, and is combusted in the combustion chamber 12 under the control of the ignition switch to generate a large amount of heat, and the heat exchanger 13 draws the heat generated by the combustion of the gas in the combustion chamber 13 and heats the heat exchange medium in the heat exchanger 13, wherein the heat exchange medium is water in the embodiment. In order to make the gas combustion more sufficient, avoid the energy waste, reduce the gas consumption, be provided with the ventilation grid on casing 1, above combustion chamber 12, be provided with the fan (not sign in the figure), discharge the waste gas that the combustor 10 produced outside casing 1 in time to make the fresh air outside casing 1 enter into combustion chamber 12 in, improve gas combustion efficiency. The heat exchanger 13 is arranged above the combustion chamber 12, through holes are arranged on the side walls of the two sides of the combustion chamber 12, as shown in the direction of fig. 1, the water inlet end of the heating water outlet pipe 4 penetrates through the through hole of the left side wall to be communicated with the left end of the heat exchanger 13, and the water outlet end of the heating water return pipe 11 is communicated with the right end of the heat exchanger 13 through the through hole of the right side wall. And a heating device is connected between the heating water outlet pipe 4 and the heating water return pipe 11. Furthermore, the heating equipment comprises a circulating pipeline, wherein the water inlet end of the circulating pipeline is communicated with the heating water outlet pipe 4, and the water outlet end of the circulating pipeline is communicated with the water inlet end of the heating water return pipe 11.

As shown in fig. 1, the water inlet of the water pump 7 is communicated with the water outlet end of the circulation pipeline, and the water outlet is communicated with the water inlet end of the heating water return pipe 11. The water pump 7 comprises an exhaust device 8, and the exhaust device 8 is used for timely adjusting the pressure in the pipeline. The control of the water pump 7 and the exhaust device 8 is not the key point of the invention, and the description is omitted.

Further, be provided with heating temperature switch 3 in heating outlet pipe 4 department, control the heating stove and get into or withdraw from heating operating condition, heating temperature switch 3 is connected with the controller, triggers heating temperature switch 3 after for the first time, and the heating stove gets into heating condition, and controller control combustor 10 gets into combustion state, and water pump 7 gets into operating condition, and the heat transfer water in the drive pipeline (including but not limited to circulation pipeline, heating outlet pipe, heating wet return, heating equipment) begins the circulation. After triggering heating temperature switch 3 again, the controller control heating stove withdraws from the heating state, and combustor 10 stop work, water pump 7 stop work immediately or the time delay. As shown in fig. 1, the heating temperature switch 3 is disposed above the heating water outlet pipe 4 near one end of the heat exchanger 13.

The heating water outlet pipe 4 is also provided with a water outlet temperature sensor 5, the water outlet temperature sensor 5 is connected with the controller or a heating control module arranged in the controller, and the heating control module controls the work of the burner 10 according to the real-time water outlet temperature provided by the water outlet temperature sensor 5. Specifically, the heating control module prestores a heating temperature limit value, which comprises an upper heating temperature limit and a lower heating temperature limit, to form a temperature limit value interval. After the heating temperature switch 3 is turned on, under the action of the water pump 7, heat exchange water starts to circulate, starts from the heat exchanger 13, enters a circulation pipeline through the heating water outlet pipe 4, enters the water pump and a heating water return pipe and flows back to the heat exchanger, and completes one heat exchange water circulation, in the circulation process, the water outlet temperature sensor 5 regularly collects the water outlet temperature real-time data of the heat exchanger 13 at the heating water outlet pipe 4 and sends the data to the controller or the heating control module connected with the water outlet temperature sensor 5, and the controller or the heating control module controls the work of the burner 10 according to the corresponding relation between the real-time water outlet temperature and the prestored heating temperature limit value (including the upper limit and the lower limit). When the outlet water temperature is within the heating temperature limit range, the controller or the heating control module controls the burner 10 to keep a combustion state, when the outlet water temperature is greater than or equal to the heating temperature upper limit value, the outlet water temperature is over high, vaporization of heat exchange water in the heat exchanger 13 and/or the heating outlet pipe 4 may occur, the controller or the heating control module controls the burner 10 to stop working, the water pump 7 keeps a working state, the heat exchange water continuously circulates in a pipeline to provide heat for heating equipment, and when the outlet water temperature is reduced to the heating temperature limit range, the controller or the heating control module controls the burner 10 to start working again to ensure that the temperature of the heating equipment is constant. When the temperature of the outlet water is less than or equal to the lower limit value of the heating temperature, the controller or the heating control module considers that the burner 10 (heating furnace) breaks down and sends an alarm prompt, or the controller or the heating control module determines that the temperature of the heat exchange water is too low, the control gas valve 6 is opened to the maximum value, the burner 10 enters the maximum output state, and the total heat generated by combustion is improved. Or a temperature limit value is preset in the controller or the heating control module, the controller or the heating control module controls the combustor 10 to stop working when the real-time outlet water temperature is greater than the temperature limit value, and when the return water temperature is less than or equal to the temperature limit value, the controller or the heating control module controls the combustor 10 to keep a combustion state or restart combustion.

In this embodiment, as shown in fig. 1, a return water temperature sensor 9 is provided on a heating return pipe 11, and detects the temperature of heat exchange water that returns after heat exchange by a heating apparatus, and realizes anti-freezing control by the return water temperature. An anti-freezing control module is arranged in the controller, the return water temperature sensor 9 and the burner 10 are respectively connected with the anti-freezing control module, and the anti-freezing control module is used for controlling the burner 10 to burn according to the return water temperature so as to realize the anti-freezing operation of the heating stove. Specifically, after the burner 10 stops burning (the heating switch 3 is turned on and the outlet water temperature reaches the upper heating temperature limit to stop burning the burner 10, or in winter, the heating switch 3 is turned off), the return water temperature sensor 9 continuously detects the temperature of the heating return water pipe 11 at regular time, transmits the temperature to the anti-freezing control module, compares the temperature with the pre-stored anti-freezing temperature limit, when the return water temperature is less than or equal to the pre-stored anti-freezing temperature limit, the anti-freezing control module determines that the temperature at the heating return water pipe 11 is too low and the possibility of freezing exists, the anti-freezing control module controls the heating stove to enter an anti-freezing mode, namely the anti-freezing control module controls the burner 10 to burn again, in the anti-freezing mode, the anti-freezing control module controls the gas valve 6 to be opened at a minimum angle, controls the ignition switch to enable the burner 10 to enter a burning state at a minimum scale, provides a minimum heat exchange amount, after the burner 10 burns for a period t1, the return water temperature sensor 9 detects the return water temperature again, if the return water temperature rises to be greater than the anti-freezing control temperature limit, and the return water temperature control module continues to stop working state until the anti-freezing control module keeps the return water temperature being greater than the anti-freezing temperature, and keeps the anti-freezing control module. And the return water temperature is continuously detected to prevent the re-occurrence of the freezing state.

As shown in fig. 1, in the present embodiment, the return water temperature sensor 9 is disposed in the air chamber 16, and can detect the return water temperature and the indoor temperature of the air chamber 16 at the same time, and the temperature collected by the return water temperature sensor 9 is relatively low and closer to the real temperature in the air chamber 16, so that the anti-freezing control is more accurate.

Further, in the embodiment, dry heating prevention control can be realized through return water temperature. An anti-dry heating control module is arranged in the controller, the return water temperature sensor 9 and the burner 10 are respectively connected with the anti-dry heating control module, and the anti-dry heating control module is used for controlling the work of the burner 10 according to the return water temperature to prevent the dry heating phenomenon. Prevent pre-storing in the dry combustion method control module and prevent dry combustion method temperature limit value, as shown in fig. 2, under the heating state, burner 10 operating condition promptly, return water temperature sensor 9 regularly gathers the real-time temperature of heating wet return 11, and send and prevent dry combustion method control module, do the comparison with the pre-stored prevent dry combustion method temperature limit value, when the real-time return water temperature that return water temperature sensor 9 detected is more than or equal to the pre-stored prevent dry combustion method temperature limit value, prevent that dry combustion method control module deems the heat transfer water in the pipeline not enough, for avoiding producing the phenomenon of dry combustion method, control burner 10 stop work, no longer produce the heat, when the heat transfer water flows through heat exchanger 13, no longer produce the heat exchange. It should be noted that, in the process of the anti-dry heating control module controlling the burner 10 to stop working, the water pump 7 does not stop working immediately, continues to use high-temperature return water to provide heat for the heating equipment, and meanwhile, the return water temperature sensor 9 continuously detects the temperature of the heating return water pipe 11 at regular time, and when the detected return water temperature is reduced below the anti-dry heating temperature limit value, the anti-dry heating control module can control the burner to restart working again. Further, in order to avoid that the amount of water for heat exchange in the pipeline is too low, and the problem of dry combustion is aggravated by reopening the burner 10 for heating after the return water temperature is reduced, in this embodiment, a water replenishing port is arranged at the water pump 7, a water replenishing valve is arranged at the water replenishing port and connected with an external (water replenishing) water source, when the real-time return water temperature detected by the return water temperature sensor 9 is greater than or equal to a pre-stored dry combustion preventing temperature limit value, the dry combustion preventing control module controls the burner 10 to stop working, and simultaneously sends out an alarm prompt, a maintenance worker opens the water replenishing valve to perform water replenishing operation according to actual conditions, or the dry combustion preventing control module directly or indirectly controls the water pump 7 to stop working, directly or indirectly controls the water replenishing valve to automatically open to perform water replenishing operation, after the water replenishing is completed, the dry combustion preventing control module controls the water pump 7 to start working again, and when the return water temperature is reduced below the dry combustion preventing temperature limit value, the dry combustion preventing control module controls the burner to restart working to ensure the heating temperature of the heating equipment. When the dry burning prevention control module controls the water replenishing valve to be automatically opened for replenishing water, the single water replenishing amount is preset in the controller (the controller or the water replenishing control module arranged in the controller is not limited) or the dry burning prevention control module, the water replenishing amount is controlled by the flow velocity sensor, the flow sensor and the water replenishing time arranged at the water replenishing valve, and the water replenishing amount is not controlled by the key points of the invention of the utility model without limitation and requirement.

The anti-freezing control and the anti-dry heating control can adopt return water temperature data provided by the same return water temperature sensor 9, two or more return water temperature sensors can be arranged on a heating return water pipe 11, and a return water temperature transmitter arranged in an air chamber 16 is connected with an anti-freezing control module to realize the anti-freezing control; and a return water temperature sensor 9 arranged at the water inlet end of the heating return water pipe 11 and close to the water pump 7 is connected with the dry burning prevention control module to realize dry burning prevention control. Set up return water temperature sensor respectively in air chamber 16 and water pump 7 punishment, can really effectively detect return water temperature on the one hand, on the other hand can effectively utilize 1 inner space of casing, has enough space installation return water temperature sensor 9, especially when reforming transform current heating stove, simple to operate

As described above, in this embodiment, the working state of the burner 10 is controlled by the dry combustion prevention control module according to the detected return water temperature, so as to prevent the occurrence of the "dry combustion" problem, and further, in order to further effectively control the dry combustion prevention problem, in this embodiment, the water pressure of the heat exchange water in the pipeline (including but not limited to the circulation pipeline, the heating water outlet pipe, and the heating water return pipe) or the water pump 7 with the water pressure sensor 8 is detected in real time. The water pressure sensor 8 is connected with the dry burning prevention control module, the dry burning prevention control module prestores a dry burning prevention water pressure limit value, in a normal state, when the heating stove is in a heating state, and the burner 10 is in a combustion state, the dry burning prevention control module compares the circulating water pressure collected by the water pressure sensor 8 with the prestore dry burning prevention water pressure limit value, when the real-time water pressure value is smaller than or equal to the dry burning prevention water pressure limit value, the dry burning prevention control module controls the burner 10 to stop burning, and sends out an alarm prompt as described above, manual water supplement is carried out by a maintenance worker or automatic water supplement is carried out by controlling a water supplement valve, after water supplement is finished, the heating stove 10 is controlled to restart to work according to the temperature value of the water outlet temperature sensor 5 as described above, and the heating state of the burner is continued.

The controller also comprises a water pressure sensor fault state detection module which is respectively connected with the water pressure sensor 8 and the dry burning prevention control module and is used for detecting the state of the water pressure sensor 8 in real time, the water pressure sensor fault detection module is a common structure in the prior art, can comprise a detection circuit, a signal receiving state detector and the like, and a detection part, a structure and a detection method can adopt any technology in the prior art or any technology which may appear in the future without requirements and limitations, can realize corresponding functions, and are not described in detail. The water pressure sensor fault state detection module is connected with the dry burning prevention control module, when the water pressure sensor 8 is detected to be out of order, fault information is provided for the controller, an alarm prompt is sent, a maintenance worker is prompted to maintain and replace the water pressure sensor 8, meanwhile, the dry burning prevention control module is sent information that the water pressure sensor 8 fails and can not accurately provide the water pressure state in the pipeline, after receiving the fault information, the dry burning prevention control module stops controlling the dry burning prevention mode of the burner 10 according to the collected water pressure information, and the working state of the burner is controlled according to the collected water return temperature at the heating water return pipe 11 instead. When the water pressure sensor 8 is replaced or maintained, the fault information provided by the water pressure sensor fault detection module disappears, the dry burning prevention control module switches the control mode again, the working state of the burner is controlled again according to the water pressure data, and the phenomenon of dry burning is prevented. That is, in this embodiment, after the heating stove enters the working state, the water pressure sensor 8 and the return water temperature sensor 9 regularly send real-time data to the dry combustion prevention control module according to the setting, when the burner 10 is in the working state, the dry combustion prevention control module firstly controls the working state of the burner according to the collected water pressure data to prevent the occurrence of the phenomenon of "dry combustion", when the water pressure sensor fault state detection module detects that the water pressure sensor 8 is in fault, the detection result is sent to the dry combustion prevention control module in real time, the dry combustion prevention control module immediately switches the dry combustion prevention control mode to be controlled according to the return water temperature, the dry combustion prevention control mode can be switched in real time, the gas passage is cut off without waiting for the control of the heating temperature switch, and the burner 10 is controlled to stop working; when the water pressure sensor 8 is recovered to be normal, the water pressure sensor is switched to a water pressure control mode in real time to control the dry burning prevention phenomenon. In practical application, as described in the embodiment provided by the present invention, the water pressure control mode is executed in a normal state, when the water pressure sensor 8 fails, the water pressure control mode is switched to the return water temperature control mode, and after the water pressure transmitter returns to normal, the water pressure control mode is switched to the return water temperature control mode; a return water temperature control mode can be set to control the occurrence of the dry burning prevention phenomenon; or the anti-dry heating control module prestores a corresponding table of a water pressure data interval region, a backwater temperature data interval and a dry heating state, the anti-dry heating phenomenon is controlled simultaneously according to the backwater temperature and the water pressure data in a normal state, and after the water pressure sensor fault state detection module sends a fault signal, the control is only carried out according to the backwater temperature, so that the 'dry heating' phenomenon is prevented.

Furthermore, a water pressure control module is further arranged in the controller, the water pressure control module is connected with a water pressure sensor 8, the water pressure control module is connected with a water replenishing valve, a water replenishing water pressure limit value is prestored in the water pressure control module, the water pressure sensor 8 transmits the detected water pressure value of the heat exchange water in the circulating state in the pipeline to the water pressure control module in real time, and when the detected water pressure value is smaller than or equal to the water replenishing water pressure limit value, the water pressure control module controls the water replenishing valve to be opened, so that water replenishing operation is automatically carried out. The water pressure control module prestores a corresponding table of different water pressure value intervals and water replenishing quantities, when the real-time water pressure value detected by the water pressure sensor 8 is smaller than or equal to a water pressure limit value, the water pressure control module selects the corresponding water replenishing quantity from the corresponding table according to the water pressure value interval where the real-time water pressure value is located, controls a water replenishing valve to be opened to perform water replenishing operation, and controls the water replenishing quantity according to a flow sensor and a flow velocity sensor which are carried by the water replenishing valve or arranged at a water replenishing pipe.

It should be noted that, the utility model provides a pair of heating stove with function of preventing frostbite can be for the novel heating stove of brand-new design, also can do the improvement on the basis with some heating stoves, add return water temperature sensor 9 in 11 departments of heating wet return to do the change of adaptability to the controller can, need not to change the structure of current heating stove, little to the improvement point of current product, improve with low costs.

To sum up, the utility model provides a pair of heating stove with function of preventing frostbite compares with prior art, has following advantage:

1. the return water temperature sensor is arranged at the water outlet end of the heating return water pipe, so that the collection of the return water temperature is not influenced by no deviation or small deviation, the anti-freezing control is more direct, the judgment error is reduced, the return water temperature sensor is further arranged in the air chamber 16, the return water temperature and the air chamber 16 temperature can be considered at the same time, and the problem that the circulating water in the heating return water pipe is frozen due to the fact that the air chamber 16 is too low in temperature is further avoided;

2. by arranging the water pressure sensor fault state detection module, dry burning prevention is controlled through return water temperature after the water pressure sensor fails, so that the control is more accurate, and misjudgment is further reduced;

3. the water pump is connected with the heating water return pipe, so that the temperature sensor and the heating temperature switch at the connection of the heating water outlet pipe cannot sense the highest temperature, the vaporization problem is serious, the heat exchanger and the fan are finally burnt, and the problem can be perfectly solved by adding the return water temperature sensor at the heating water return pipe;

4. the structure is simple, only one return water temperature sensor needs to be added, the structural change of the existing product is not needed, and the improvement cost is low.

Similar solutions can be derived as described above in connection with the given solution content. However, any simple modification, equivalent change and modification made to the above embodiments according to the technical essence of the present invention are still within the scope of the technical solution of the present invention unless departing from the content of the technical solution of the present invention.

Claims (10)

1. The utility model provides a heating stove with function of preventing frostbite, including controller, combustor, heat exchanger and with the heating outlet pipe and the heating wet return of heat exchanger intercommunication, the heating outlet pipe communicates its characterized in that with the circulation pipeline's of heating installation end of intaking: the heating water return pipe is provided with a return water temperature sensor, the return water temperature sensor is connected with an anti-freezing control module arranged in the controller, and the anti-freezing control module is used for controlling the combustor to re-combust again according to the return water temperature detected by the return water temperature sensor after the combustor stops working.

2. A heating stove with an antifreezing function as set forth in claim 1, wherein: the heating control system is characterized in that a heating control module is preset in the controller, an outlet water temperature sensor connected with the heating control module is arranged on a heating outlet pipe, a heating temperature limit value is arranged in the heating control module, and the heating control module is used for controlling the work of the burner according to the corresponding relation between the outlet water temperature detected by the outlet water temperature sensor and the heating temperature limit value interval.

3. A heating stove with an anti-freezing function as claimed in claim 1, characterized in that: the heating furnace also comprises a heating temperature switch for controlling the heating furnace to enter a heating state.

4. A heating stove with an antifreezing function as set forth in claim 1, wherein: the water outlet end of the heating water return pipe is connected with the heat exchanger, the water inlet end of the heating water return pipe is connected with the water outlet of the water pump, and the water inlet of the water pump is communicated with the water outlet end of the circulating pipeline.

5. A heating stove with an antifreezing function as set forth in claim 4, wherein: the water pump includes an exhaust.

6. A heating stove with an antifreezing function as set forth in claim 4, wherein: and a pressure release valve is arranged on the water pump.

7. A heating stove with an anti-freezing function as claimed in claim 1, characterized in that: the combustor also comprises a fan arranged above the combustor.

8. A heating stove with an anti-freezing function as claimed in claim 1, characterized in that: the backwater temperature sensor is arranged at the water outlet end of the heating backwater pipe.

9. A heating stove with an anti-freezing function as claimed in claim 8, characterized in that: the backwater temperature sensor is arranged inside the air chamber.

10. A heating stove with an anti-freezing function as claimed in any one of claims 1 to 9, characterized in that: the anti-freezing control module controls the gas valve to be opened at a minimum angle when controlling the combustor to reburn according to the return water temperature.

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