Zero-cold-water gas water heater capable of automatically switching high-gear water quantity and low-gear water quantity

Abstract

A zero-cold-water gas water heater capable of automatically switching high-gear water quantity and low-gear water quantity comprises a machine body, a controller and a first temperature sensor, the machine body is provided with a water inlet, a water flow sensor, a water quantity gear switching valve, a heat exchanger, a water outlet, a controller and a second temperature sensor, and the water inlet, the water flow sensor, the water quantity gear switching valve, the heat exchanger and the water outlet are sequentially communicated. The controller is electrically connected with the water flow sensor, the water quantity gear switching valve and the first temperature sensor, and the controller controls the water quantity gear switching valve to switch the water flow of the corresponding gear according to the temperature value detected by the first temperature sensor. According to the zero-cold-water gas water heater, the water volume gear switching valve is arranged, the water volume gear switching valve achieves automatic water flow gear switching according to the heat load and the water temperature in the using process so that the target temperature can be achieved, the problem that manual adjustment is inconvenient is solved, too high cost is avoided, and the water heater is suitable for large-scale popularization and application. And meanwhile, the problems that the water volume is too small and cannot be increased when the water temperature is high are solved, and the user experience feeling is greatly improved.

Description

Technical Field

[0001] This utility model relates to the field of water heater technology, and in particular to a zero-cold-water gas water heater that automatically switches between high and low water volumes. Background Technology

[0002] The main water adjustment methods for existing household gas water heaters with automatic switching between high and low water volume are manual adjustment (with knob), automatic adjustment (stepper motor), water temperature adjustment (shape memory alloy), and water volume adjustment with a flow stabilizing device. Manual adjustment is inconvenient, automatic adjustment (stepper motor) is expensive, water temperature adjustment (shape memory alloy) results in too little water volume when the water temperature is high, and water volume adjustment with a flow stabilizing device cannot be increased.

[0003] Therefore, further improvements are necessary. Utility Model Content

[0004] The purpose of this utility model is to provide a zero-cold-water gas water heater that automatically switches between high and low water volumes, which is simple in structure, easy to adjust, low in cost, has a large water volume, and is highly practical, in order to overcome the shortcomings of the existing technology.

[0005] A zero-cold-water gas water heater designed for this purpose, which automatically switches between high and low water flow rates, includes a body, characterized in that: the body is provided with a water inlet, a water flow sensor, a water flow rate switching valve, a heat exchanger, a water outlet, a controller, and a first temperature sensor connected in sequence. The first temperature sensor is located at the water outlet. The controller is electrically connected to the water flow sensor, the water flow rate switching valve, and the first temperature sensor respectively. The controller controls the water flow rate switching valve to switch the water flow rate to the corresponding level according to the temperature value detected by the first temperature sensor.

[0006] The unit is also equipped with a gas proportional valve and a burner that are interconnected. The burner is located below the heat exchanger. The controller is electrically connected to the gas proportional valve. The controller controls the opening degree of the gas proportional valve based on the water flow detected by the water flow sensor and the temperature value detected by the first temperature sensor.

[0007] The machine body is also equipped with a human-machine interface for setting the target temperature and receiving actual temperature feedback, and the controller is electrically connected to the human-machine interface.

[0008] The water flow rate switching valve includes a valve body and a valve core. The valve body is provided with an inlet channel, a regulating channel and an outlet channel connected in sequence. The valve core is installed in the valve body and moves up and down. When the valve core moves down, it partially enters the regulating channel and when the valve core moves up, it leaves the regulating channel to adjust the area of ​​the regulating channel and thus switch the water flow rate of the corresponding level.

[0009] An elastic element is provided between the valve core and the valve body. When the valve core is subjected to external force, it moves downward and compresses the elastic element. When the elastic element is subjected to elastic force, the valve core moves upward and resets.

[0010] The valve body is provided with a guide part, and the valve core is provided with a guide hole. The valve core is installed in the valve body by moving up and down through the cooperation of the guide hole and the guide part.

[0011] The water flow rate switching valve is a solenoid valve.

[0012] The machine body is also equipped with a water pump, and the water flow sensor, water pump and water volume level switching valve are connected in sequence. The water pump is equipped with a second temperature sensor, and the water inlet is equipped with a water inlet valve. The controller is electrically connected to the second temperature sensor and the water inlet valve respectively.

[0013] A thermostat is installed on the pipeline between the heat exchanger and the water outlet, and the controller is electrically connected to the thermostat.

[0014] The top of the unit is equipped with a fan assembly and a pressure switch. The fan assembly is connected to the burner, and the controller is electrically connected to the fan assembly and the pressure switch respectively.

[0015] This utility model of a zero-cold-water gas water heater features a water flow rate switching valve. During use, the valve automatically switches the water flow rate according to the heat load and water temperature to achieve the target temperature. This solves the problem of inconvenience in manual adjustment, avoids excessive costs, and also prevents the problem of insufficient water flow or inability to increase water flow when the water temperature is high, greatly improving the user experience. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the internal structure of a gas water heater in one embodiment of the present invention.

[0017] Figure 2 This is a schematic diagram illustrating the working principle of a gas water heater in one embodiment of the present invention.

[0018] Figure 3 This is a cross-sectional view of the water flow rate switching valve in a high-water state according to one embodiment of the present invention.

[0019] Figure 4 This is a cross-sectional view of the water flow rate switching valve in a low water state according to one embodiment of the present invention. Detailed Implementation

[0020] The present invention will be further described below with reference to the accompanying drawings and embodiments.

[0021] See Figures 1-4This automatic high / low water volume switching zero-cold-water gas water heater includes a body 1. The body 1 is provided with a water inlet 2, a water flow sensor 3, a water volume level switching valve 4, a heat exchanger 5, a water outlet 6, a controller 7, and a first temperature sensor 8 connected in sequence. The first temperature sensor 8 is located on the water outlet 6. The controller 7 is electrically connected to the water flow sensor 3, the water volume level switching valve 4, and the first temperature sensor 8. The controller 7 controls the water volume level switching valve 4 to switch the water flow to the corresponding level according to the temperature value detected by the first temperature sensor 8.

[0022] The main body 1 is also equipped with a gas proportional valve 9 and a burner 10 that are interconnected. The burner 10 is located below the heat exchanger 5. The controller 7 is electrically connected to the gas proportional valve 9. The controller 7 controls the opening degree of the gas proportional valve 9 according to the water flow rate detected by the water flow sensor 3 and the temperature value detected by the first temperature sensor 8. The main body 1 is equipped with an air inlet 25, which is connected to the gas proportional valve 9.

[0023] The machine body 1 is also equipped with a human-machine interface 11 for setting the target temperature and receiving actual temperature feedback. The controller 7 is electrically connected to the human-machine interface 11. When the machine is working, the target temperature value is input through the human-machine interface 11. The controller 7 simultaneously detects the water flow rate and the outlet water temperature, and then adjusts the firepower by controlling the gas proportional valve 9. When the water flow rate, outlet water temperature and firepower are mismatched (i.e. the outlet water temperature does not reach the target temperature value), the controller 7 controls the water flow rate switching valve 4 to switch to a suitable water flow rate until the outlet water temperature reaches the target temperature value and remains constant.

[0024] The water flow rate switching valve 4 includes a valve body 12 and a valve core 13. The valve body 12 has an inlet channel 14, a regulating channel 15, and an outlet channel 26 connected sequentially. The valve core 13 is vertically movable within the valve body 12. When the valve core 13 moves downwards, part of it enters the regulating channel 15 (e.g., ...). Figure 4 As shown), at this time, the area of ​​the water regulating channel 15 decreases, that is, the water flow decreases, which in turn reduces the water volume. When the valve core 13 moves upward, it leaves the water regulating channel 15 (as shown). Figure 3 As shown in the figure, the area of ​​the water regulating channel 15 is at its maximum, that is, the water flow is at its maximum, which in turn increases the water flow rate; thus, the water flow rate of the corresponding gear is switched; the above structure makes the water flow rate gear two.

[0025] The water flow rate switching valve 4 is a solenoid valve; an elastic element 16 is provided between the valve core 13 and the valve body 12. The elastic element 16 is a spring. When the controller 7 supplies power to the solenoid valve, under the action of the electromagnetic field (i.e., under the action of external force), the valve core 13 moves downward and compresses the elastic element 16; when the solenoid valve is de-energized, the valve core 13 moves upward and resets under the elastic force of the elastic element 16.

[0026] The valve body 12 is provided with a guide part 17, and the bottom of the valve core 13 is provided with a guide hole 18. The valve core 13 is installed in the valve body 12 by the cooperation of the guide hole 18 and the guide part 17.

[0027] The main body 1 is also equipped with a water pump 19, a water flow sensor 3, a water pump 19 and a water volume level switching valve 4 connected in sequence. The water volume level switching valve 4 is installed on the pipe between the water pump 19 and the heat exchanger 5. A second temperature sensor 20 is installed on the water pump 19. The second temperature sensor 20 is used to detect the inlet water temperature. An inlet valve 24 is installed on the water inlet 2. The controller 7 is electrically connected to the second temperature sensor 20 and the inlet valve 24 respectively.

[0028] A thermostat 21 is installed on the pipeline between the heat exchanger 5 and the outlet 6. The controller 7 is electrically connected to the thermostat 21. If the thermostat 21 detects that the outlet water temperature is higher than the set value, the thermostat 21 will automatically disconnect and shut down the equipment.

[0029] The top of the unit 1 is equipped with a fan assembly 22 and a pressure switch 23. The fan assembly 22 is connected to the burner 10, and the controller 7 is electrically connected to the fan assembly 22 and the pressure switch 23 respectively. The fan assembly 22 provides oxygen for the combustion of the burner 10 and discharges the exhaust gas generated by the combustion to the outside.

[0030] The above describes the preferred embodiments of this utility model, illustrating and describing its basic principles, main features, and advantages. Those skilled in the art should understand that this utility model is not limited to the above embodiments. The embodiments and descriptions in the specification are merely illustrative of the principles of this utility model. Various changes and modifications can be made without departing from the spirit and scope of this utility model, and all such changes and modifications fall within the scope of the claims. The scope of protection of this utility model is defined by the appended claims and their equivalents.

Claims

1. A zero-cold-water gas water heater that automatically switches between high and low water volumes, comprising a body (1), characterized in that: The machine body (1) is provided with an inlet (2), a water flow sensor (3), a water flow level switching valve (4), a heat exchanger (5), an outlet (6), a controller (7), and a first temperature sensor (8) connected in sequence. The first temperature sensor (8) is located on the outlet (6). The controller (7) is electrically connected to the water flow sensor (3), the water flow level switching valve (4), and the first temperature sensor (8). The controller (7) controls the water flow level switching valve (4) to switch the water flow of the corresponding level according to the temperature value detected by the first temperature sensor (8).

2. The zero-cold-water gas water heater with automatic high and low water volume switching according to claim 1, characterized in that: The body (1) is also equipped with a gas proportional valve (9) and a burner (10) that are interconnected. The burner (10) is located below the heat exchanger (5). The controller (7) is electrically connected to the gas proportional valve (9). The controller (7) controls the opening degree of the gas proportional valve (9) according to the water flow detected by the water flow sensor (3) and the temperature value detected by the first temperature sensor (8).

3. The zero-cold-water gas water heater with automatic high and low water volume switching according to claim 2, characterized in that: The machine body (1) is also equipped with a human-machine interface (11) for setting the target temperature and receiving actual temperature feedback, and the controller (7) is electrically connected to the human-machine interface (11).

4. The zero-cold-water gas water heater with automatic high and low water volume switching according to claim 1, characterized in that: The water flow rate switching valve (4) includes a valve body (12) and a valve core (13). The valve body (12) is provided with an inlet channel (14), a water adjustment channel (15) and an outlet channel (26) connected in sequence. The valve core (13) is installed in the valve body (12) with vertical movement. When the valve core (13) moves downward, it partially enters the water adjustment channel (15). When the valve core (13) moves upward, it leaves the water adjustment channel (15) to adjust the area of ​​the water adjustment channel (15) and thus switch the water flow rate of the corresponding level.

5. The zero-cold-water gas water heater with automatic high and low water volume switching according to claim 4, characterized in that: An elastic element (16) is provided between the valve core (13) and the valve body (12). The valve core (13) moves downward under the action of external force and compresses the elastic element (16). The valve core (13) moves upward and resets under the elastic force of the elastic element (16).

6. The zero-cold-water gas water heater with automatic high and low water volume switching according to claim 4, characterized in that: The valve body (12) is provided with a guide part (17), and the valve core (13) is provided with a guide hole (18). The valve core (13) is installed in the valve body (12) by the cooperation of the guide hole (18) and the guide part (17).

7. The zero-cold-water gas water heater with automatic high and low water volume switching according to claim 4, characterized in that: The water flow rate switching valve (4) is a solenoid valve.

8. The zero-cold-water gas water heater with automatic high and low water volume switching according to claim 1, characterized in that: The machine body (1) is also equipped with a water pump (19), and the water flow sensor (3), water pump (19) and water volume level switching valve (4) are connected in sequence. The water pump (19) is equipped with a second temperature sensor (20), and the water inlet (2) is equipped with a water inlet valve (24). The controller (7) is electrically connected to the second temperature sensor (20) and the water inlet valve (24) respectively.

9. The zero-cold-water gas water heater with automatic high and low water volume switching according to claim 1, characterized in that: A thermostat (21) is installed on the pipeline between the heat exchanger (5) and the outlet (6), and the controller (7) is electrically connected to the thermostat (21).

10. The zero-cold-water gas water heater with automatic switching between high and low water volume as described in claim 2, characterized in that: The top of the body (1) is equipped with a fan assembly (22) and a pressure switch (23). The fan assembly (22) is connected to the burner (10), and the controller (7) is electrically connected to the fan assembly (22) and the pressure switch (23).

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