CN2169092Y - Water heater with automatic constant temperature device - Google Patents

Abstract

A water heater with an automatic temperature-regulating device comprises a heating water tank, a main burner, a pilot burner capable of igniting the main burner, a high-pressure ignition device, a group of interconnected water pressure air inlet valves and fine-tuning air valves and a gas valve body, and further comprises a central processing unit capable of generating appropriate control signals according to the difference between the actual water temperature and the set water temperature, and the fine-tuning air valve has a piston capable of generating fine-motion expansion and contraction according to the control signal of the central processing unit and thus controlling the gas flow rate.

Description

The utility model relates to a water heater capable of automatically setting the temperature, in particular to a water heater with an automatic temperature setting device capable of effectively controlling the water temperature.

As shown in Fig. 1 and Fig. 2, it is a structural schematic diagram and a partial sectional view of a conventional water heater. The design of a conventional water heater mainly includes a heating water tank 10, a main burner 11, a pilot burner 12 for igniting the main burner 11, a high pressure Ignition device 13, a group of connected water pressure inlet valve 14, differential pressure control valve 15 and gas valve body 16 (as shown in Figure 2), heating water tank 10 is provided with cold water inlet pipe 101 and hot water outlet The water pipe 102, and the cold water inlet pipe 101 communicates with the hydraulic inlet valve 14, and the gas valve body 16 is provided with a gas inlet 160, and the pressure difference control valve 15 is provided with a gas film rubber sheet 150 to distinguish the inside and outside. Pressure chambers 151, 152, and the internal pressure chamber 151 communicates with the differential pressure chamber 161 of the gas valve body 16, while the external pressure chamber 152 is provided with a pressure solenoid valve 153 and an exhaust solenoid valve 154, and the pressure solenoid valve 153 The pipeline is connected to the differential pressure chamber 161 and is normally open, and the exhaust solenoid valve 154 is connected to the pilot burner 12 through the pipeline and is normally closed. In addition, the gas film of the differential pressure control valve 15 The rubber sheet 150 is provided with a piston 155 that is close to the gas outlet valve 162 of the gas valve body 16, and the high-voltage ignition device 13 includes components such as a micro switch, a spark plug 131, and a flame detector 132 in the past.

As shown in Figure 2, when the water heater is used in the past, after the tap is turned on, the water flow will enter the cold water inlet pipe 101 and pass through the hydraulic inlet valve 14, and the water pan diaphragm 140 of the hydraulic inlet valve 14 will be pushed upward by the pressure of the water flow. Jack up and move the water tray ejector rod 141 upward, and open the intake piston 164 of the gas valve body 16, so that the gas enters the valve body 16 and flows into the differential pressure chamber 161 through the manual adjustment of the regulating valve 164. At this time The gas will enter the external pressure chamber 152 of the differential pressure control valve 15 through the normally open pressurized solenoid valve 153, so that the external pressure chamber 152 will generate air pressure, and then the gas film rubber sheet 150 will press the piston 155 to seal the gas valve body 16 The air outlet valve 162 of the water pressure water inlet valve 14, while the water pan diaphragm 140 and the water pan ejector rod 141 of the water pressure water inlet valve 14 are lifted upwards, the micro switch is pushed open so that the high voltage ignition device 13 is powered, and then the differential pressure air control valve is opened The normally closed hole of the exhaust electromagnetic valve 154 on the 15 makes the gas send to the pilot burner 12, after the pilot burner 12 is ignited by the high-pressure ignition of the spark plug 131, the flame detector 132 sends the detection signal back to the high-voltage device and Stop the ignition, and at the same time send power to the pressure solenoid valve 153 to close the valve, so the external pressure disappears, and the pressure in the internal pressure chamber 151 pushes away the air film rubber sheet 150, and then drives the piston 155 to open the gas outlet valve 162, so that the gas passes through the gas outlet valve 162 into the main burner 11, and ignited by the pilot burner 12 to heat the heating water tank 10, so hot water is output from the faucet.

Although the use of water heaters in the past can achieve the purpose of providing hot water, the temperature of hot water cannot be set during use. Only a manual gas regulating valve 164 is provided on the gas valve body 16 to adjust the size of the gas flow. After the flow adjustment is set, the heating of the water will produce a certain temperature rise. If the temperature of the incoming water changes or the flow of the incoming water changes, the outlet water temperature of the faucet will change accordingly; if the water temperature is 15°C, adjust Adjust valve 164 to the gas output with a temperature rise of 25°C. In this way, hot water with a temperature of 40°C can be obtained, which is just suitable. If the condition of the gas output remains the same, but the temperature of the inlet water changes to 25°C, the temperature will be 50°C. The temperature of this hot water is too high to be suitable, so the user must readjust the gas control valve 164, and repeated adjustments are not only inconvenient but also may not be able to accurately determine the temperature. If you do not adjust and use cold water mixed with hot water, it will Because the pressure of the cold water is higher than that of the hot water, the water temperature can easily become hot and cold immediately after a slight adjustment.

The main purpose of this utility model is to provide an automatic temperature-fixing device for a water heater, which can make the water heater output hot water at a predetermined temperature, and can still provide hot water with an appropriate temperature even when the water flow rate or the temperature of the incoming water changes.

The utility model is characterized in that it has a central processing unit located at a suitable place of the water heater, a temperature sensor located on the water outlet pipe of the hot water tank, and a fine-tuning air valve controlled by the central processing unit, wherein the central processing unit The device includes a temperature setter, and a logic comparison circuit that can compare the set temperature with the detected temperature and output an appropriate control signal. , and then the piston that can control the change of the gas flow rate; the temperature sensor detects the temperature of the hot water output by the water heater and sends a logic comparison circuit to compare with the set temperature of the temperature setter, so as to output an appropriate control signal to fine-tune the gas valve The piston produces displacement to adjust the gas flow, so as to make the hot water output temperature of the water heater stable and suitable for use.

The effect of the utility model: the utility model water heater can automatically set the temperature, which can make the water heater output hot water at a certain temperature, even when the water flow rate or the temperature of the incoming water changes, it can still provide hot water with stable water temperature for users to use.

The water heater of the present utility model is described in detail below by the preferred embodiment and the accompanying drawings, in the accompanying drawings:

Fig. 1 is a structural schematic diagram of a conventional water heater.

Fig. 2 is a partial sectional view of a conventional water heater.

Fig. 3 is a schematic structural view of a preferred embodiment of the utility model.

Fig. 4 is a partial sectional view of a preferred embodiment of the present invention.

Fig. 5 is a perspective view of a piston in a preferred embodiment of the utility model.

Fig. 6 is a structural block diagram of a central processing unit in a preferred embodiment of the present invention.

Fig. 7 is a control flow chart of the central processing unit of the preferred embodiment of the utility model.

Fig. 8 is a schematic structural view of a high water pressure flow limiting valve in a preferred embodiment of the present invention.

As shown in Fig. 3 and Fig. 4, it is the structure schematic diagram and the partial sectional view of the preferred embodiment of the present utility model, and this embodiment mainly comprises a heating water tank 2, a main burner 3, a guide that can ignite the main burner 3 Burner 4, a high-pressure ignition device 5, a group of connected water pressure intake valve 6, fine-tuning gas valve 7 and gas valve body 8 (as shown in Figure 4), the heating water tank 2 is surrounded by a cold water inlet pipe 21 communicates with the hot water outlet pipe 22, and the cold water inlet pipe 21 communicates with the hydraulic inlet valve 6, while the gas valve body 8 is provided with a gas inlet 80, a differential pressure chamber 81 and an outlet valve 82, and the fine-tuning valve 7 An air film rubber sheet 70 is provided to distinguish the inner and outer pressure chambers 71 and 72, and the inner pressure chamber 71 communicates with the differential pressure chamber 81 of the gas valve body 8, while the outer pressure chamber 72 is provided with a pressure solenoid valve 73 With the exhaust solenoid valve 74, and the pressure solenoid valve 73 is connected with the pressure difference chamber 81 by the pipeline and is normally open, and the exhaust solenoid valve 74 is connected with the pilot burner 4 by the pipeline and is normally closed As for the high-voltage ignition device 5, it includes components such as a micro switch, a spark plug 51, and a flame detector 52 in the past; The piston 75 of the air outlet valve 82 is a perspective view of the piston as shown in FIG. , the channel 752 can have different flow rates depending on the position of the protruding column 751 of the piston 75 in the outlet valve 82, and a central processing unit 9 that can control the fine-tuning valve 7 is provided at an appropriate place of the water heater, as shown in Figure 6 , which is a structural block diagram of the central processing unit, the central processing unit 9 mainly includes a temperature setting device 91, a temperature sensor 92 located on the hot water outlet pipe 22, and a set temperature can be compared with the detected temperature and A logic comparison circuit 93 that generates appropriate control signals and an oscillator 94 that generates pulse signals to the pressurization solenoid valve 73 or exhaust solenoid valve 74 of the fine-tuning gas valve 7 according to the control signal output of the logic comparison circuit 93 .

As shown in Figure 7 is the control flow chart of the central processing unit, in conjunction with Figure 4, when the water heater is in use, the water flow will enter the cold water inlet pipe 21 and pass through the water pressure inlet valve 6 after the tap is turned on, and the water pressure will be promoted by the pressure of the water flow. The water pan diaphragm 60 of the intake valve 6 lifts upwards and moves the water pan ejector rod 61 upwards to open the intake piston 83 of the gas valve body 8 so that the gas enters the valve body 8 and flows into the differential pressure chamber 81 At this time, the gas will enter the external pressure chamber 72 of the fine-tuning gas valve 7 through the normally open heating solenoid valve 73, so that the external pressure chamber 72 will generate air pressure, and then the gas film rubber sheet 70 will press the piston 75 to seal the gas valve body 8 outlet valve 82; while the water tray diaphragm 60 and the water tray ejector rod 61 of the water pressure intake valve 6 are lifted up, the micro switch is pushed open so that the high-voltage ignition device 5 receives power, and the spark plug 51 guides The burner 4 discharges and ignites, and at the same time, the central processing unit 9 also receives power to act. At this time, the temperature sensor 92 detects and sends back a water temperature signal, and the central processing unit 9 will analyze that the water temperature is insufficient and send a control signal to drive the normally closed drain. The gas solenoid valve 74 is opened, so that the gas is sent to the pilot burner 4 through the gas valve body 8 and the exhaust solenoid valve 74, so that the pilot burner 4 cooperates with the high-voltage discharge of the spark plug 51 to complete the ignition, which is detected by the flame sensor 52 and After the signal is sent back to the central processing unit 9, the central processing unit 9 will control the power supply to the normally open pressure solenoid valve 73, so that the pressure solenoid valve 73 is closed, and then the external pressure chamber 72 of the fine-tuning gas valve 7 The pressure effect of the air pressure disappears, so the pressure of the internal pressure chamber 71 of the fine-tuning gas valve 7 pushes the air film rubber sheet 70, and then the convex post 751 of the piston 75 exits the gas outlet valve 82, so the gas passes through the channel on the convex post 751 of the piston 75 The gap between 752 and the outlet valve 82 is discharged to the main burner 3, and the main burner 3 is ignited by the flame of the pilot burner 4, and the heating water tank 2 is heated, so that the hot water outlet pipe 22 gradually has hot water flowing out; After the main burner 3 is ignited, the central processing unit 9 will close the normally open exhaust solenoid valve 74, so that the external pressure gas of the fine-tuning valve 7 cannot be discharged, so the gas film rubber sheet 70 can no longer move in conjunction with the piston 75 , so the protruding post 751 of the piston 75 is positioned at the proper place of the gas valve 82, so that the width of the channel 752 is fixed, and the gas discharge volume of the gas valve body 8 is constant.

When the aforementioned gas flow rate cannot make the water temperature reach the set temperature, the central processing unit 9 will send a positive pulse control signal to make the closed exhaust solenoid valve 74 open again to discharge a small amount of gas, so that the piston 75 convex column 751 will withdraw from the gas outlet valve again. 82 a little, increase the width of passage 752, to increase the gas flow of outlet valve 82, make the flame of main burner 3 increase, thus raise water temperature, until water temperature reaches setting temperature, similarly when water quantity is large or water temperature of inlet water is higher When low, also according to the aforementioned control method, the water temperature is made to reach the set temperature, and when the set temperature is reached, the gas is quantitatively flowed out; After the comparison of the logic comparator circuit 93, a negative pulse control signal will be sent out, so that the pressure solenoid valve 73 reduces the valve hole, and a small amount of gas enters the external pressure chamber 72, so the air film rubber sheet 70 moves the convex column 751 of the piston 75 to Outlet valve 82 stretches into and causes channel 752 to become smaller, to reduce the gas flow of outlet valve 82, the flame of main burner 3 is reduced, so can reach the purpose of lowering water temperature, till water temperature reaches setting temperature.

The above-mentioned temperature setting device of the central processing unit 9 can be manually adjusted and set by the knob, and can also be set in a remote manner by the remote controller and the receiver, so as to provide hot water kept at an appropriate temperature for the user to use .

Shown in Fig. 3 and Fig. 8 is the structural diagram of the high water pressure flow limiting valve, the water heater used in the place of high water pressure (such as high-rise building or the building with big drop) can install a high water pressure valve on the cold water inlet pipe 21. The water pressure flow limiting valve 20, as shown in Figure 8, the high water pressure flow limiting valve 20 mainly includes a flow limiting valve body 201, a movable valve plug 202, and a pressure between the movable valve plug 202 and the flow limiting valve body 201. The spring 203, the adjustment rod 205 of the linkage adjustment plate 204 and other components, when the water pressure is low, the water flows through the water inlet 507 to the large channel 206 in the center of the flow limiting valve body 201, the small channels 207 on both sides, and the inlet of the movable valve plug 202. The water port 2020 enters, and then flows out from the water outlet 506. When the water pressure is high and exceeds the setting standard of the adjustment rod 205 and the adjustment plate 204, the piston valve plug 202 will be pushed upward, and then the large channel 206 in the center of the valve body 201 will be closed. At this time, the water flow can only flow through the small channels 207 on both sides of the flow limiting valve body 201, and then flow out from the water outlet 506, so as to achieve the purpose of controlling the water flow without being affected by the water pressure, so that the water temperature can be controlled accurately. conduct.

Claims (2)

1. A water heater with an automatic temperature setting device, which includes a heating water tank, a main burner, a pilot burner capable of igniting the main burner, a high-pressure ignition device, a group of connected hydraulic inlet valves and micro Regulating gas valve and gas valve body, the gas valve body is equipped with a differential pressure chamber, and the fine-tuning gas valve is equipped with a gas film rubber sheet to distinguish the inner and outer pressure chambers, the inner pressure chamber communicates with the differential pressure chamber of the gas valve body, The external pressure chamber is equipped with a pressure solenoid valve and an exhaust solenoid valve, and a piston for controlling the opening and closing of the gas outlet valve of the gas valve body is connected to the air film rubber sheet of the fine-tuning gas valve. A central processor for regulating the telescopic displacement of the piston of the air valve and a temperature sensor for detecting the water temperature arranged on the outlet pipe of the hot water tank; the central processor controls and fine-tunes the air valve according to the water temperature detected by the temperature sensor. 2. The water heater with an automatic temperature-fixing device according to claim 1, characterized in that: the central processing unit includes a temperature setting device, which can compare the set temperature with the temperature detected by the sensor to generate a control The logic comparison circuit of the signal and a pulse signal generated according to the control signal of the logic comparison circuit are sent to the oscillator of the pressurization solenoid valve and exhaust solenoid valve of the fine-tuning gas valve.

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