CN105605786B - constant temperature gas water heater of remote control temperature setting value - Google Patents

Abstract

The invention discloses a constant temperature gas water heater with remote control temperature setting value. The constant temperature gas water heater includes two hot water outlets and one cold water inlet. The temperature setting value of the constant temperature gas water heater; the inlet cold water flow of the cold water inlet and the outlet hot water flow of the first hot water outlet are detected by the Hall water flow sensor; the remote control temperature setting value of the constant temperature gas water heater is based on the Hall The ratio of the pulse frequency output by the water flow sensor controls the temperature setting value of the constant temperature gas water heater. The device does not need a wired or wireless remote controller, can realize remote control of the hot water temperature setting value of the constant temperature gas water heater, and the control result is stable and reliable.

Description

Thermostatic gas water heater with remote control temperature set point

technical field

The invention relates to a constant temperature gas water heater, in particular to a constant temperature gas water heater with a remote control temperature setting value.

Background technique

The constant temperature gas water heater can keep the temperature of the outlet water constant, but if the temperature setting is not appropriate, especially when showering, the temperature of the gas water heater without wireless remote control or long-distance wire control cannot be adjusted. Adding cold water with the mixing valve will easily cause the gas water heater turn off the flame. The wireless remote control is used to adjust the temperature of the gas water heater. Due to the limitation of the installation location, the remote control signal cannot be transmitted to the gas water heater in many occasions. When the long-distance wire control method is used, the special waterproof wired remote control is expensive, and it needs to be embedded in advance. It works in a humid environment such as a bathroom for a long time, and the electronic wired remote control has a high failure rate.

Contents of the invention

The purpose of the present invention is to provide a solution for remote control of the hot water temperature of a constant temperature gas water heater, that is, a constant temperature gas water heater capable of remotely controlling the temperature setting value.

In order to achieve the above object, the present invention provides a constant temperature gas water heater for remote control of the temperature setting value, including:

The constant temperature gas water heater includes a controller, a heat exchanger, a first Hall water flow sensor, a second Hall water flow sensor, a first hot water outlet, a second hot water outlet, a cold water inlet and a cold water pipe , Main hot water pipe, first hot water pipe, second hot water pipe.

The cold water pipe is connected between the cold water inlet and the heat exchanger; one end of the first hot water pipe is connected to the first hot water outlet, and the other end is connected to the water outlet of the main hot water pipe; One end of the water pipe is connected to the second hot water outlet, and the other end is connected to the water outlet end of the main hot water pipe; the water inlet end of the main hot water pipe is connected to the heat exchanger.

The first Hall water flow sensor is installed on the cold water pipe, or is installed on the main hot water pipe main hot water pipe, and is used to detect the inlet cold water flow of the cold water inlet; the second Hall water flow sensor is installed On the first hot water pipe, it is used to detect the outlet hot water flow rate of the first hot water outlet.

The first Hall water flow sensor is provided with a first pulse signal output terminal, and the second Hall water flow sensor is provided with a second pulse signal output terminal; the controller is provided with a first pulse signal input terminal and a second pulse signal output terminal. The signal input terminal, the first pulse signal input terminal and the second pulse signal input terminal are respectively connected to the first pulse signal output terminal and the second pulse signal output terminal.

The constant temperature gas water heater with remote control temperature setting value controls the temperature setting value of the constant temperature gas water heater according to the ratio between the pulse frequency of the second pulse signal and the pulse frequency of the first pulse signal.

There are two methods of controlling the temperature setpoint as described:

The first method of controlling the temperature setting value is to increase the relative outlet hot water flow rate of the first hot water outlet, then increase the temperature setting value; specifically, when the pulse frequency of the second pulse signal is the same as that of the first When the ratio between the pulse frequency of the first pulse signal increases, the temperature setting value increases; when the ratio between the pulse frequency of the second pulse signal and the pulse frequency of the first pulse signal decreases, the temperature setting value decreases .

The second method of controlling the temperature setting value is to increase the relative outlet hot water flow rate of the first hot water outlet, then reduce the temperature setting value; specifically, when the pulse frequency of the second pulse signal is the same as that of the first When the ratio between the pulse frequency of the first pulse signal increases, the temperature setting value decreases; when the ratio between the pulse frequency of the second pulse signal and the pulse frequency of the first pulse signal decreases, the temperature setting value increases .

The temperature setting value is jointly controlled by the constant temperature gas water heater, the first connecting water pipe, the second connecting water pipe, and the mixing valve; the two water inlets of the mixing valve are respectively connected to the first connecting water pipe and the second connecting water pipe The first hot water outlet and the second hot water outlet of the constant temperature gas water heater; the outlet hot water flow of the first hot water outlet and the second hot water outlet is changed by adjusting the water mixing valve.

The temperature setting value may be jointly controlled by the constant temperature gas water heater, the first connecting water pipe, the second connecting water pipe, the first regulating valve, and the second regulating valve; the water inlet ends of the first connecting water pipe and the second connecting water pipe are respectively Connect to the first hot water outlet and the second hot water outlet of the constant temperature gas water heater; the water outlets of the first connecting water pipe and the second connecting water pipe are connected to one water outlet; the first regulating valve is installed on the first On the connecting water pipe, the second regulating valve is installed on the second connecting water pipe; the outlet hot water flows of the first hot water outlet and the second hot water outlet are respectively changed by adjusting the first regulating valve and the second regulating valve.

In the first method of controlling the temperature setting value, the temperature setting value is according to the formula

Calculate, where T is the temperature setting value, F 1 and F 2 are the pulse frequencies of the first pulse signal and the second pulse signal respectively, T 1 is the lowest temperature setting value, and K is the temperature adjustment range coefficient.

In the second method of controlling the temperature setting value, the temperature setting value is according to the formula

Calculate, where T is the temperature setting value, F 1 and F 2 are the pulse frequencies of the first pulse signal and the second pulse signal respectively, T 2 is the maximum temperature setting value, and K is the temperature adjustment range coefficient.

The steps for the controller to calculate the temperature setpoint are:

Step S1, initialization;

Step S2, sampling the inlet cold water flow of the cold water inlet and the outlet hot water flow of the first hot water outlet to obtain the pulse frequency of the first pulse signal and the second pulse signal;

Step S3, calculating the temperature setting value of the constant temperature gas water heater;

Step S4, other processing and waiting; when the next sampling time is up, go to step S2.

The constant temperature gas water heater also includes a power supply module, a hot water temperature detection module, a gas flow control drive module, a fan control drive module, an ignition control and flame detection module.

The beneficial effect of the present invention is that the remote control of the hot water temperature setting value of the constant temperature gas water heater is realized by adopting the method of controlling the two-way hot water flow through the water valve without the need of a wired or wireless remote controller, and the control result is stable and reliable.

Description of drawings

Fig. 1 is a structural block diagram of embodiment 1 of a constant temperature gas water heater for remote control of temperature setting value.

Fig. 2 is a structural block diagram of embodiment 2 of the constant temperature gas water heater for remote control of the temperature setting value.

Figure 3 is a block diagram of the flow detection circuit.

Fig. 4 is a flow chart of calculating the temperature setting value.

Detailed ways

The present invention will be further described in detail below in conjunction with the embodiments and the accompanying drawings, but the embodiments of the present invention are not limited thereto.

The structural block diagram of Embodiment 1 of the constant temperature gas water heater for remote control of the temperature setting value is shown in Figure 1, wherein the constant temperature gas water heater includes a heat exchanger 101, a first Hall water flow sensor 201, a second Hall water flow sensor 202, The first hot water outlet 203, the second hot water outlet 204, the cold water inlet 205, the cold water pipe 401, the main hot water pipe 402, the first hot water pipe 403, the second hot water pipe 404; and the constant temperature gas water heater The water mixing valve 301 , the first connecting water pipe 405 , the second connecting water pipe 406 , the mixing hot water pipe 407 , and the water outlet nozzle 302 jointly realize the remote control temperature setting value.

The constant temperature gas water heater has one cold water inlet and two hot water outlets, the cold water pipe 401 is connected between the cold water inlet 205 and the heat exchanger 101; one end of the first hot water pipe 403 is connected to the first hot water The water outlet 203, the other end is connected to the water outlet of the main hot water pipe 402; one end of the second hot water pipe 404 is connected to the second hot water outlet 204, and the other end is connected to the water outlet of the main hot water pipe 402; the main hot water pipe The water inlet end of 402 is connected to heat exchanger 101 . The first Hall water flow sensor 201 is installed on the cold water pipe 401 , or installed on the main hot water pipe 402 . The second Hall water flow sensor 202 is installed on the first hot water pipe 403 .

The two water inlets of the water mixing valve 301 are respectively connected to the first hot water outlet 203 and the second hot water outlet 204 of the constant temperature gas water heater by the first connecting water pipe 405 and the second connecting water pipe 406; The water outlet is connected to the water outlet nozzle 302 by a mixed hot water pipe 407 .

The structural block diagram of embodiment 2 of the constant temperature gas water heater for remote control of the temperature setting value is shown in Fig. A regulating valve 303 is installed on the first connecting water pipe 405, and the second regulating valve 304 is installed on the second connecting water pipe 406; connect.

The constant temperature gas water heater also includes a controller 210, the block diagram of its flow detection circuit is shown in Figure 3, the first Hall water flow sensor 201 is provided with a first pulse signal output terminal OUT1, which is used to detect the flow rate of the cold water inlet 205 Inlet cold water flow, the signal type of the first pulse signal is pulse frequency. The second Hall water flow sensor 202 is provided with a second pulse signal output terminal OUT2 for detecting the outlet hot water flow rate of the first hot water outlet 203, and the signal type of the second pulse signal is pulse frequency. The first Hall water flow sensor 201 and the second Hall water flow sensor 202 are powered by a single power supply; in Figure 3, the first Hall water flow sensor 201 and the second Hall water flow sensor 202 are powered by a single power supply +VDD .

The controller 210 is provided with a first pulse signal input terminal IN1 and a second pulse signal input terminal IN2; the first pulse signal input terminal IN1 and the second pulse signal input terminal IN2 are connected to the first pulse signal output terminal OUT1 and the second pulse signal input terminal IN2 respectively. Signal output terminal OUT2.

The working principle of the constant temperature gas water heater with remote control temperature setting value is:

Adjust the water mixing valve 301, or adjust the first regulating valve 303 and the second regulating valve 304 to change the outlet hot water flow of the first hot water outlet 203 and the inlet cold water flow of the cold water inlet 205, thereby changing the first pulse signal and The pulse frequency of the second pulse signal; according to the ratio between the pulse frequency of the second pulse signal and the pulse frequency of the first pulse signal, the temperature setting value of the constant temperature gas water heater is controlled. The inlet cold water flow rate of the cold water inlet 205 is equal to the sum of the outlet hot water flow rates of the first hot water outlet 203 and the second hot water outlet 204 .

Suppose the pulse frequencies of the first pulse signal and the second pulse signal are F 1 and F 2 respectively, and the temperature setting value of the constant temperature gas water heater is T . There are two ways to control the temperature setting value. The first method is to increase When the relative outlet hot water flow rate of the first hot water outlet 203 is increased, the temperature setting value is increased. Specifically, when the ratio of F 2 to F 1 increases, the temperature setting value T increases; when F 2 As the ratio relative to F1 decreases, the temperature set point T decreases. The controller 210 is in accordance with the formula

Calculate the temperature setting value T of the constant temperature gas water heater, where T 1 is the lowest temperature setting value, and K is the temperature adjustment range coefficient.

The second method is to increase the relative outlet hot water flow rate of the first hot water outlet 203, then reduce the temperature setting value, specifically, when the ratio of F2 to F1 increases, the temperature setting value T decreases; when the ratio of F2 to F1 decreases, the temperature set point T increases. The controller 210 is in accordance with the formula

Calculate the temperature setting value T of the constant temperature gas water heater, where T 2 is the highest temperature setting value, and K is still the temperature adjustment range coefficient.

The water temperature control range of the water heater is usually between 30°C and 80°C. For example, select T 1 = 35°C, K = 40; or select T 2 = 75°C, K = 40, then the temperature setting value T is controlled at 35°C to 75°C.

The controller 210 is composed of a microcontroller and peripheral circuits. The microcontroller is preferably a single-chip microcomputer, or other devices such as ARM and DSP are selected. The first pulse signal input terminal IN1 and the second pulse signal input terminal IN2 are counting input terminals of the internal counter of the microcontroller.

The constant temperature gas water heater also includes a hot water temperature detection module, a gas flow control drive module, a fan control drive module, an ignition control and flame detection module, and the like. Further, the constant temperature gas water heater also optionally includes a cold water temperature detection module, a temperature value display module, a wind pressure detection module, and some or all of the buzzer modules.

The constant temperature gas water heater also includes a power module, which is used to provide a single power supply +VDD and other power supplies to supply power to the controller 210, the first flow sensor 201, the second flow sensor 202 and other modules.

The flow chart of the controller 210 calculating the temperature setting value is shown in Figure 4, and its steps are:

Step S1, initialization;

Step S2, sampling the inlet cold water flow of the cold water inlet 205 and the outlet hot water flow of the first hot water outlet 203, and obtaining the pulse frequencies F1 and F2 of the first pulse signal and the second pulse signal;

Step S3, calculating the temperature setting value T of the constant temperature gas water heater;

Step S4, other processing and waiting; when the next sampling time is up, go to step S2.

In addition to calculating the temperature setting value T of the constant temperature gas water heater, the controller 210 also performs other controls on the constant temperature gas water heater. The other processes and waits include water temperature sampling, water temperature control, gas flow control drive, fan control drive, ignition control, etc. that need to be completed by the controller 210, as well as waiting. After the controller 210 calculates and obtains the temperature setting value T , it adopts an appropriate control algorithm to control the heating power of the gas water heater by controlling the gas flow, so that the temperature of the hot water outlet of the gas water heater can be controlled within the allowable error near the temperature setting value T Within the range, the constant temperature function can be realized.

The controller 210 adopts software delay or timer timing to realize the control of the time when the next sampling time is up.

The first Hall water flow sensor 201 and the second Hall water flow sensor 202 are preferably Hall water flow sensors with the same measurement range.

The above description is only an embodiment of the present invention, and is not intended to limit the present invention. For those skilled in the art, the present invention may have various modifications and changes. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principles of the present invention shall be included within the scope of the claims of the present invention.

Claims (10)

1. A constant temperature gas water heater with remote control temperature setting value, characterized in that: The constant temperature gas water heater includes a controller, a heat exchanger, a first Hall water flow sensor, a second Hall water flow sensor, a first hot water outlet, a second hot water outlet, a cold water inlet and a cold water pipe , the main hot water pipe, the first hot water pipe, the second hot water pipe; The cold water pipe is connected between the cold water inlet and the heat exchanger; one end of the first hot water pipe is connected to the first hot water outlet, and the other end is connected to the water outlet of the main hot water pipe; One end of the water pipe is connected to the second hot water outlet, and the other end is connected to the outlet end of the main hot water pipe; the water inlet end of the main hot water pipe is connected to the heat exchanger; The first Hall water flow sensor is installed on the cold water pipe for detecting the inlet cold water flow of the cold water inlet; the second Hall water flow sensor is installed on the first hot water pipe for detecting the first hot water flow. The outlet hot water flow rate of the water outlet; The first Hall water flow sensor is provided with a first pulse signal output terminal, and the second Hall water flow sensor is provided with a second pulse signal output terminal; the controller is provided with a first pulse signal input terminal and a second pulse signal output terminal. Signal input terminal, the first pulse signal input terminal and the second pulse signal input terminal are respectively connected to the first pulse signal output terminal and the second pulse signal output terminal; The constant temperature gas water heater with remote control temperature setting value controls the temperature setting value of the constant temperature gas water heater according to the ratio between the pulse frequency of the second pulse signal and the pulse frequency of the first pulse signal; There are two methods of controlling the temperature setpoint as described: The first method of controlling the temperature setting value is to increase the relative outlet hot water flow rate of the first hot water outlet, then increase the temperature setting value; specifically, when the pulse frequency of the second pulse signal is the same as that of the first When the ratio between the pulse frequency of the first pulse signal increases, the temperature setting value increases; when the ratio between the pulse frequency of the second pulse signal and the pulse frequency of the first pulse signal decreases, the temperature setting value decreases ; The second method of controlling the temperature setting value is to increase the relative outlet hot water flow rate of the first hot water outlet, then reduce the temperature setting value; specifically, when the pulse frequency of the second pulse signal is the same as that of the first When the ratio between the pulse frequency of the first pulse signal increases, the temperature setting value decreases; when the ratio between the pulse frequency of the second pulse signal and the pulse frequency of the first pulse signal decreases, the temperature setting value increases . 2. The constant temperature gas water heater with remote control temperature setting value according to claim 1, characterized in that: the temperature setting value is jointly controlled by the constant temperature gas water heater, the first connecting water pipe, the second connecting water pipe, and the water mixing valve ; The two water inlets of the mixing valve are respectively connected to the first hot water outlet and the second hot water outlet of the constant temperature gas water heater by the first connecting water pipe and the second connecting water pipe; The outlet hot water flow rate of the second hot water outlet is changed by adjusting the water mixing valve. 3. The constant temperature gas water heater with remote control temperature setting value according to claim 1, characterized in that: said temperature setting value is composed of constant temperature gas water heater, first connecting water pipe, second connecting water pipe, first regulating valve, The second regulating valve is jointly controlled; the water inlet ends of the first connecting water pipe and the second connecting water pipe are respectively connected to the first hot water outlet and the second hot water outlet of the constant temperature gas water heater; the first connecting water pipe, The water outlet of the second connecting water pipe is connected to a water outlet; the first regulating valve is installed on the first connecting water pipe, and the second regulating valve is installed on the second connecting water pipe; the first hot water outlet, the second hot water The outlet hot water flow rate of the water outlet is changed by adjusting the first regulating valve and the second regulating valve respectively. 4. The constant temperature gas water heater with remote control temperature setting value as claimed in claim 1, characterized in that: in the first method of controlling the temperature setting value, the temperature setting value is according to the formula Calculate, where T is the temperature setting value, F1 and F2 are the pulse frequencies of the first pulse signal and the second pulse signal respectively, T1 is the lowest temperature setting value, and K is the temperature adjustment range coefficient. 5. The constant temperature gas water heater with remote control temperature setting value as claimed in claim 1, characterized in that: in the second method of controlling the temperature setting value, the temperature setting value is according to the formula Calculate, where T is the temperature setting value, F1 and F2 are the pulse frequencies of the first pulse signal and the second pulse signal respectively, T2 is the highest temperature setting value, and K is the temperature adjustment range coefficient. 6 . The constant temperature gas water heater with remote control temperature setting value according to claim 4 , characterized in that: the minimum temperature setting value T1 = 35° C., and the temperature adjustment range coefficient K = 40. 7 . 7. The constant temperature gas water heater with remote control temperature setting value according to claim 5, characterized in that: the maximum temperature setting value T2=75°C, and the temperature adjustment range coefficient K=40. 8. The constant temperature gas water heater with remote control temperature setting value according to claim 1, characterized in that: the first Hall water flow sensor and the second Hall water flow sensor are Hall water flow in the same range sensor. 9. The constant temperature gas water heater with remote control temperature setting value according to claim 1, characterized in that: the step of calculating the temperature setting value by the controller is: Step S1, initialization; Step S2, sampling the inlet cold water flow of the cold water inlet and the outlet hot water flow of the first hot water outlet to obtain the pulse frequency of the first pulse signal and the second pulse signal; Step S3, calculating the temperature setting value of the constant temperature gas water heater; Step S4, other processing and waiting; when the next sampling time is up, go to step S2. 10. The constant temperature gas water heater with remote control temperature setting value according to claim 1, characterized in that: the constant temperature gas water heater also includes a power supply module, a hot water temperature detection module, a gas flow control drive module, and a fan control drive module , Ignition control and flame detection module.