Gas quick water heater capable of preventing water stop and temperature sudden rise

Abstract

This utility model discloses a gas-fired rapid water heater that prevents sudden temperature rise during water outages. It includes: a base shell, a water pump, a thermostatic chamber, a three-way valve, an inlet water temperature sensor, an outlet water temperature sensor, a controller, a heat exchanger, and a burner. The base shell has an air inlet, a water inlet, and an outlet. The water pump is located on a return pipe. The thermostatic chamber is located on the inlet pipe between the water pump and the heat exchanger. A gas proportional valve is located on the air inlet. The three-way valve is located on the outlet pipe. The return pipe connects the three-way valve, the outlet pipe, and the inlet end of the thermostatic chamber. Two sets of inlet water temperature sensors are respectively arranged on corresponding pipes. The outlet water temperature sensor is located at the front end of the three-way valve. The controller is located inside the base shell and connected to the electrical wires of each component. By adding a three-way valve, a return pipe, a water pump, and a thermostatic chamber to an existing ordinary gas-fired rapid water heater, the problem of sudden water temperature rise during a second restart after water is turned off mid-shower is solved, improving the user experience.

Description

Technical Field

[0001] This utility model relates to the field of water heater technology, specifically a gas-fired rapid water heater that prevents sudden temperature rise during water outages. Background Technology

[0002] Existing solutions for hot water heaters on the market to address temperature rise during water outages involve adding a thermostatic chamber or a bypass pipe to the outlet. The thermostatic chamber solution requires draining all cold water from the chamber before hot water comes out on the first use, wasting water and gas. Furthermore, the hot water takes some time to reach the set temperature, impacting user experience. The bypass pipe solution allows cold water to flow directly into the coil for extended periods, creating a temperature difference between the heat exchanger pipes and fins, generating condensate, corroding the fins, and reducing the heat exchanger's lifespan. Utility Model Content

[0003] This utility model provides a gas-fired instantaneous water heater that prevents sudden temperature rise during water outages. By adding a three-way valve, return pipe, water pump, and constant temperature chamber to the existing ordinary gas-fired instantaneous water heater, it can better meet the user's needs for hot water while solving the problem of temperature rise during water outages when restarting the water heater after shutting off the water during showering.

[0004] To achieve the above objectives, this utility model provides the following technical solution: a gas-fired rapid water heater with anti-sudden temperature rise during water outages, comprising a bottom shell, a water pump, a thermostatic chamber, a three-way valve, an inlet water temperature sensor, an outlet water temperature sensor, a controller, a heat exchanger, and a burner. The bottom shell is provided with an air inlet, a water inlet, and an outlet. The water pump is located on a return water pipe. The thermostatic chamber is located on the inlet water pipe and between the water pump and the heat exchanger. A gas proportional valve is provided on the air inlet. The three-way valve is located on the outlet water pipe. One end of the return water pipe connects the three-way valve to the outlet water pipe, and the other end connects to the inlet of the thermostatic chamber. The inlet water temperature sensor includes a first inlet water temperature sensor and a second inlet water temperature sensor. The first inlet water temperature sensor is located on the pipe between the inlet water and the water pump. The second inlet water temperature sensor is located on the pipe between the thermostatic chamber and the heat exchanger. The outlet water temperature sensor is located at the front end of the three-way valve. The controller is located inside the bottom shell and is connected to the electrical wires of each component.

[0005] Preferably, the water pump is equipped with a Hall element for detecting water flow signals.

[0006] Preferably, the heat exchanger is equipped with an anti-dry-burning thermostat for detecting the heat exchanger temperature.

[0007] Preferably, the burner is located below the heat exchanger and is connected to the air inlet via a pipe, and the gas proportional valve is located on the pipe between the air inlet and the burner.

[0008] Preferably, the controller receives temperature sensor signals and controls the various components.

[0009] Preferably, the bottom shell is equipped with a fan and is connected to the burner.

[0010] Compared with the prior art, the beneficial effects of this utility model are:

[0011] With its constant-temperature water circulation and intelligent control system, the system can accurately control the water temperature when restarting after a water outage or shutdown, minimizing the deviation between the outlet water temperature and the set target temperature, thus preventing scalding caused by a sudden rise in water temperature. The constant-temperature chamber eliminates the need to discharge large amounts of cold water during initial use, effectively avoiding waste of water and gas resources. Attached Figure Description

[0012] Figure 1 This is a schematic diagram of the structure of this utility model;

[0013] Figure 2 This is an enlarged view of the structure of this utility model.

[0014] Reference numerals in the attached drawings: 1. Bottom shell; 2. Air inlet; 3. Water inlet; 4. Water return pipe; 5. Water pump; 6. Hall element; 7. First water inlet temperature sensor; 8. Constant temperature chamber; 9. Second water inlet temperature sensor; 10. Anti-dry burning thermostat; 11. Controller; 12. Heat exchanger; 13. Burner; 14. Gas proportional valve; 15. Water outlet temperature sensor; 16. Three-way valve; 17. Water outlet; 18. Fan. Detailed Implementation

[0015] To make the objectives, technical solutions, and advantages of this utility model clearer, the present utility model is described below with reference to specific embodiments shown in the accompanying drawings. However, it should be understood that these descriptions are merely exemplary and not intended to limit the scope of the present utility model. Furthermore, descriptions of well-known structures and technologies are omitted in the following description to avoid unnecessarily obscuring the concept of the present utility model.

[0016] It should also be noted that, in order to avoid obscuring the present invention with unnecessary details, only the structures and / or processing steps closely related to the solution according to the present invention are shown in the accompanying drawings, while other details that are not closely related to the present invention are omitted.

[0017] See as Figures 1-2As shown, this specific embodiment adopts the following technical solution: including: a bottom shell, a water pump, a constant temperature chamber, a three-way valve, an inlet water temperature sensor, an outlet water temperature sensor, a controller, a heat exchanger, and a burner. The bottom shell is provided with an air inlet, a water inlet, and an outlet. The water pump is located on the return water pipe. The constant temperature chamber is located on the inlet water pipe and between the water pump and the heat exchanger. The air inlet is provided with a gas proportional valve. The three-way valve is located on the outlet water pipe. One end of the return water pipe is connected to the three-way valve and the outlet water pipe, and the other end is connected to the inlet of the constant temperature chamber. The inlet water temperature sensor includes a first inlet water temperature sensor and a second inlet water temperature sensor. The first inlet water temperature sensor is located on the pipe between the inlet water and the water pump. The second inlet water temperature sensor is located on the pipe between the constant temperature chamber and the heat exchanger. The outlet water temperature sensor is located at the front end of the three-way valve. The controller is located inside the bottom shell and electrically connected to each component.

[0018] The water pump is equipped with a Hall element for detecting water flow signals; the heat exchanger is equipped with an anti-dry-burning thermostat for detecting the heat exchanger temperature; the burner is located below the heat exchanger and is connected to the air inlet via a pipe; the gas proportional valve is located on the pipe between the air inlet and the burner; the controller receives temperature sensor signals and controls the various components; a fan is located inside the bottom shell and is connected to the burner.

[0019] The working principle of this specific implementation method is as follows: In normal bathroom mode, when the water inlet switch is opened, cold water flows through the water pump. The Hall element on the water pump detects the water flow signal, and the fan starts to perform pre-cleaning. At the same time, the cold water enters the constant temperature chamber and then flows into the heat exchanger. The intelligent controller sends a valve opening signal to the gas proportional valve, and the gas is injected into the combustion chamber of the burner. The intelligent controller sends an ignition signal, and the burner burns the gas. The heat exchanger absorbs the heat of combustion and exchanges heat. The exhaust gas from the combustion is discharged outside the machine by the fan, and finally, constant temperature hot water is output at the outlet. When it is necessary to turn off the water supply during bathroom use, simply close the water outlet at the water end. When the water outlet is closed, the intelligent controller automatically sends signals to the water pump and three-way valve switch, connecting the water pump, thermostatic chamber, heat exchanger, three-way valve, and return water pipe into a loop. Then, the fan starts upon receiving the controller signal, and the gas proportional valve opens upon receiving the controller signal. The gas burns on the burner, and the heat exchanger absorbs the heat from the combustion. The intelligent controller calculates the temperatures from the three temperature sensors to reach the set target temperature, at which point the machine automatically shuts off. If the machine reopens the water outlet switch within 10 minutes, the water temperature will deviate from the set target temperature by no more than 2 degrees Celsius.

[0020] This specific implementation uses a constant-temperature water internal circulation and intelligent control system to accurately control the water temperature when restarting after a water outage or shutdown, minimizing the deviation between the outlet water temperature and the set target temperature, thus preventing scalding caused by excessively high water temperature; the constant-temperature chamber eliminates the need to discharge large amounts of cold water during initial use, effectively avoiding waste of water resources and gas.

[0021] It will be apparent to those skilled in the art that this invention is not limited to the details of the exemplary embodiments described above, and that it can be implemented in other specific forms without departing from the spirit or essential characteristics of this invention. Therefore, the embodiments should be considered exemplary and non-limiting in all respects, and the scope of this invention is defined by the appended claims rather than the foregoing description. Thus, it is intended that all variations falling within the meaning and scope of equivalents of the claims be included within this invention.

[0022] Furthermore, it should be understood that although this specification describes embodiments, not every embodiment contains only one independent technical solution. This narrative style is merely for clarity. Those skilled in the art should consider the specification as a whole, and the technical solutions in each embodiment can also be appropriately combined to form other embodiments that can be understood by those skilled in the art.

Claims

1. A gas-fired instantaneous water heater designed to prevent sudden temperature rise during water outages, characterized in that: include: The system comprises a base shell, a water pump, a thermostatic chamber, a three-way valve, an inlet water temperature sensor, an outlet water temperature sensor, a controller, a heat exchanger, and a burner. The base shell has an air inlet, a water inlet, and an outlet. The water pump is located on a return water pipe. The thermostatic chamber is located on the inlet water pipe and between the water pump and the heat exchanger. The air inlet has a gas proportional valve. The three-way valve is located on the outlet water pipe. One end of the return water pipe connects the three-way valve to the outlet water pipe, and the other end connects to the inlet of the thermostatic chamber. The inlet water temperature sensor includes a first inlet water temperature sensor and a second inlet water temperature sensor. The first inlet water temperature sensor is located on the pipe between the inlet water and the water pump, and the second inlet water temperature sensor is located on the pipe between the thermostatic chamber and the heat exchanger. The outlet water temperature sensor is located at the front end of the three-way valve. The controller is located inside the base shell and is connected to the electrical wires of each component.

2. A gas-fired instantaneous water heater with anti-sudden temperature rise during water outages as described in claim 1, characterized in that, The water pump is equipped with a Hall element for detecting water flow signals.

3. A gas-fired instantaneous water heater for preventing sudden temperature rise during water outages as described in claim 1, characterized in that, The heat exchanger is equipped with an anti-dry-burning temperature controller for detecting the heat exchanger temperature.

4. A gas-fired instantaneous water heater for preventing sudden temperature rise during water outages as described in claim 1, characterized in that, The burner is located below the heat exchanger and is connected to the air inlet via a pipe. The gas proportional valve is located on the pipe between the air inlet and the burner.

5. A gas-fired instantaneous water heater for preventing sudden temperature rise during water outages as described in claim 1, characterized in that, The controller receives signals from the temperature sensor and controls the various components.

6. A gas-fired instantaneous water heater with anti-sudden temperature rise during water outages as described in claim 1, characterized in that, The bottom shell contains a fan that is connected to the burner.

Images