Resistance type electric wall-hanging stove

Abstract

The utility model discloses a resistance-type electric wall-hanging stove which comprises a shell, a resistance-type heating body, a temperature control assembly, a pressure sensor, a circulating water pump and a controller, wherein the resistance-type heating body, the temperature control assembly, the pressure sensor, the circulating water pump and the controller are installed in the shell. The water inlet end of the circulating water pump penetrates through the shell through a water inlet pipe and extends out of the shell. The water outlet end of the circulating water pump is connected with a water outlet pipe, and the other end of the water outlet pipe passes through the resistance-type heating body, penetrates through the shell and extends out of the shell; a temperature control assembly and a pressure sensor are arranged on one section, outside the resistance-type heating body, of the water outlet pipe; the controller is in signal connection with the resistance-type heating body, the temperature control assembly, the pressure sensor and the circulating water pump. Compared with a water flow switch, the controller is used for detecting water pressure fluctuation of the pressure sensor to judge whether water flow circulation of the system is normal or not, control and judgment are accurate, and interference of magnetic substances in water is avoided.

Description

Technical Field

[0001] The utility model relates to the technical field of wall-mounted boilers, in particular to a resistance-type electric wall-mounted boiler. Background Art

[0002] The full name of the wall-mounted boiler is "gas heating hot water boiler". It is a water heater that uses natural gas as energy. It has multiple safety protection measures such as anti-freeze protection, anti-dry burning protection, accidental flameout protection, over-temperature protection, and water pump anti-stuck protection.

[0003] Most of the gas heating hot water boilers on the market currently use water flow switches to determine whether the water flow in the system is normal. When water flows, the water flow switch will push the baffle so that the controller can detect the water flow signal. However, there are some magnetic substances in the water that will adhere to this patch, causing the force of the water pushing the baffle to become greater and greater, thereby affecting the judgment of whether the water flow in the system is normal. Utility Model Content

[0004] The purpose of the utility model is to provide a resistance type electric wall-mounted boiler to solve one or more technical problems existing in the prior art and at least provide a beneficial choice or create conditions.

[0005] The purpose of the utility model is achieved by the following technical solutions:

[0006] A resistive electric wall-mounted boiler comprises a shell and a resistive heating element, a temperature control component, a pressure sensor, a circulating water pump and a controller installed in the shell;

[0007] The water inlet end of the circulating water pump penetrates the shell through a water inlet pipe and extends to the outside of the shell;

[0008] The water outlet end of the circulating water pump is connected to a water outlet pipe, and the other end of the water outlet pipe passes through the resistive heating element and penetrates the shell to extend to the outside of the shell;

[0009] The water outlet pipe is located in the shell and the temperature control component and the pressure sensor are arranged in a section outside the resistive heating body;

[0010] The controller signal connects the resistive heating element, the temperature control component, the pressure sensor and the circulating water pump.

[0011] Furthermore, the temperature control component includes a limit temperature controller and a temperature control probe, and the temperature control probe is arranged on the limit temperature controller.

[0012] Furthermore, the resistive heating element comprises an outer shell, a plurality of longitudinally arranged heating tubes are arranged in the outer shell, the water outlet pipe passes through a section in the outer shell and is arranged in a coil shape, and the water outlet pipe is coiled around the outer circumference of the heating tube.

[0013] Furthermore, a snap-type temperature control switch is also provided on the housing.

[0014] Furthermore, an expansion water tank is provided in the shell, and the expansion water tank is connected to the circulating water pump through a pipeline.

[0015] Furthermore, one end of the water outlet pipe passes through the shell and is connected to the water inlet pipe via a bypass pipe, and a one-way valve is provided in the bypass pipe.

[0016] Furthermore, a water supply valve is provided on the water inlet pipe, and a control end of the water supply valve penetrates the shell and extends to the outside of the shell.

[0017] Furthermore, a safety valve is provided on the circulating water pump.

[0018] Compared with the prior art, the beneficial effects of the present invention are:

[0019] Compared with the water flow switch, the controller detects the water pressure fluctuation of the pressure sensor to determine whether the system water flow circulation is normal. The control judgment is accurate and will not be interfered by the magnetic substances in the water. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 This is a schematic diagram of the appearance structure of the resistance-type electric wall-mounted boiler of the utility model;

[0021] Figure 2 for Figure 1 Schematic diagram of the internal structure;

[0022] Figure 3 for Figure 2 Schematic diagram of the decomposition.

[0023] In the figure: 10, shell; 20, resistive heating element; 21, outer shell; 22, heating tube; 30, temperature control component; 31, limit thermostat; 32, temperature control probe; 40, pressure sensor; 50, circulating water pump; 60, controller; 70, water inlet pipe; 80, water outlet pipe; 90, sudden jump temperature control switch; 100, expansion tank; 110, bypass pipe; 120, water supply valve; 130, safety valve. DETAILED DESCRIPTION

[0024] The present invention is further described below in conjunction with the accompanying drawings and specific implementation methods. It should be noted that, under the premise of no conflict, the various embodiments or technical features described below can be arbitrarily combined to form a new embodiment.

[0025] like Figure 1-Figure 3A resistive electric wall-mounted boiler is shown, comprising a shell 10 and a resistive heating element 20, a temperature control component 30, a pressure sensor 40, a circulating water pump 50 and a controller 60 installed in the shell 10; the water inlet end of the circulating water pump 50 passes through the shell 10 through a water inlet pipe 70 and extends to the outside of the shell 10; the water outlet end of the circulating water pump 50 is connected to a water outlet pipe 80, and the other end of the water outlet pipe 80 passes through the resistive heating element 20 and passes through the shell 10 to extend to the outside of the shell 10; the water outlet pipe 80 is located in the shell 10 and a section outside the resistive heating element 20 is provided with a temperature control component 30 and a pressure sensor 40; the controller 60 signals connect the resistive heating element 20, the temperature control component 30, the pressure sensor 40 and the circulating water pump 50.

[0026] The control process of the resistive electric wall-mounted boiler is as follows: when T outlet water temperature < T set temperature - T hysteresis temperature, the controller 60 determines that there is a heating demand, the controller 60 detects and saves the pressure value P1 of the pressure sensor 40, the circulating water pump 50 rotates, and the controller 60 continuously detects the pressure value P2 of the pressure sensor 40 after the circulating water pump 50 is started: if the pressure value P2> the pressure value P1, the controller 60 determines that the system circulation is smooth, and the resistive heating element 20 can be powered on for heating until the T outlet water temperature> T set temperature + 5, the heating is stopped and the insulation stage is entered, and the circulating water pump 50 rotates 3 and stops 7; if the pressure value P2< the pressure value P1, the controller 60 determines that the system circulation is not smooth, the circulating water pump 50 runs for 60s and then stops for 30s, and the circulating water pump 50 is started again to determine the pressure values ​​P1 and P2. If the pressure value P2 is < the pressure value P1 for three consecutive times, the controller reports a water pressure fault.

[0027] Based on the above structure, the temperature control assembly 30 includes a limit temperature controller 31 and a temperature control probe 32 . The temperature control probe 32 is arranged on the limit temperature controller 31 .

[0028] Based on the above structure, the resistive heating element 20 includes an outer shell 21, in which a plurality of longitudinally arranged heating tubes 22 are arranged. The water outlet pipe 80 passes through a section in the outer shell 21 and is arranged in a coil shape. The water outlet pipe 80 is coiled around the outer periphery of the heating tube 22.

[0029] On the basis of the above structure, a snap-action temperature control switch 90 is further provided on the housing 21 .

[0030] On the basis of the above structure, an expansion water tank 100 is further provided in the housing 10 , and the expansion water tank 100 is connected to the circulating water pump 50 through a pipeline.

[0031] Based on the above structure, the water outlet pipe 80 passes through one end of the outer shell 21 and is connected to the water inlet pipe 70 through a bypass pipe 110. A one-way valve is arranged in the bypass pipe 110. The design of the bypass pipe 110 and the one-way valve can release the pressure of the circulating water pump 50 when the terminal equipment connected to the wall-mounted boiler is blocked.

[0032] On the basis of the above structure, a water replenishment valve 120 is provided on the water inlet pipe 70 , and a control end of the water replenishment valve 120 penetrates the housing 10 and extends to the outside of the housing 10 .

[0033] Based on the above structure, a safety valve 130 is provided on the circulating water pump 50 .

[0034] The above-mentioned implementation modes are only preferred implementation modes of the present invention, and cannot be used to limit the protection scope of the present invention. Any non-substantial changes and substitutions made by technicians in this field on the basis of the present invention shall fall within the scope of protection required by the present invention.

Claims

1. A resistance type electric wall-mounted boiler, characterized in that: It includes a shell and a resistive heating element, a temperature control component, a pressure sensor, a circulating water pump and a controller installed in the shell; The water inlet end of the circulating water pump penetrates the shell through a water inlet pipe and extends to the outside of the shell; The water outlet end of the circulating water pump is connected to a water outlet pipe, and the other end of the water outlet pipe passes through the resistive heating element and penetrates the shell to extend to the outside of the shell; The water outlet pipe is located in the shell and the temperature control component and the pressure sensor are arranged in a section outside the resistive heating body; The controller signal connects the resistive heating element, the temperature control component, the pressure sensor and the circulating water pump.

2. The resistive electric wall-mounted boiler according to claim 1, characterized in that: The temperature control component comprises a limit temperature controller and a temperature control probe, and the temperature control probe is arranged on the limit temperature controller.

3. The resistive electric wall-mounted boiler according to claim 1, characterized in that: The resistive heating element comprises a shell, a plurality of longitudinally arranged heating tubes are arranged in the shell, the water outlet pipe passes through a section in the shell and is arranged in a coil shape, and the water outlet pipe is coiled around the outer circumference of the heating tube.

4. The resistive electric wall-mounted boiler according to claim 3, characterized in that: The shell is also provided with a snap-action temperature control switch.

5. The resistive electric wall-mounted boiler according to claim 1, characterized in that: An expansion water tank is also arranged in the shell, and the expansion water tank is connected with the circulating water pump through a pipeline.

6. The resistive electric wall-mounted boiler according to claim 1, characterized in that: One end of the water outlet pipe passing through the shell is connected to the water inlet pipe through a bypass pipe, and a one-way valve is arranged in the bypass pipe.

7. The resistive electric wall-mounted boiler according to claim 1, characterized in that: The water inlet pipe is provided with a water replenishing valve, and a control end of the water replenishing valve penetrates the shell and extends to the outside of the shell.

8. The resistive electric wall-mounted boiler according to claim 1, characterized in that: The circulating water pump is provided with a safety valve.

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