Control method of zero cold water gas water heater and zero cold water gas water heater

Abstract

The invention discloses a control method of a zero cold water gas water heater. The control method is used for preventing incorrect starting of the gas water heater and is implemented according to thefollowing specific steps: S1, collecting the water inlet pressure P<inflow water> of a water inlet of the gas water heater in real time; S2, matching the water inlet pressure P<inflow water> in the step S1 with the preset starting flow of the gas water heater and calculating the starting flow V<starting> under the current water inlet pressure; and S3, collecting the water flow V<hot water> of a main water pipe of the gas water heater in real time and determining whether the zero cold water gas water heater is started or not according to the relation between the water flow V<hot water> and thestarting flow V<starting> in the step S2. The invention further discloses the gas water heater. Through the control method of the zero cold water gas water heater, the water inlet pressure is matchedwith the suitable starting flow, and the problem of incorrect starting of the gas water heater is solved.

Description

technical field

[0001] The invention belongs to the technical field of gas water heaters, and in particular relates to a control method of a zero-cold water gas water heater and a zero-cold water gas water heater. Background technique

[0002] At present, there are two waterway installation methods for zero-cold water gas water heaters: one is a three-pipe scheme with cold water pipes, hot water pipes, and return water pipes; the other is a two-pipe scheme with only cold water pipes and hot water pipes. A one-way valve is installed at the washing table at the far water end to connect the cold and hot water pipes to prevent the backflow of hot water. For the two-pipe solution, the working principle of the zero-cold water gas water heater is: the preheating function is activated in the water-off state, and the internal circulation pump drives the cold and hot water pipes to circulate the water. When hot, the water stored in the cold water pipe flows into the water heater, flo...

Examples

Embodiment 1

[0035] Embodiment 1 of the present invention provides a control method for a zero-cooled gas water heater, such as Figure 1-2 As shown, it is used to prevent the gas water heater from being turned on by mistake, and the specific implementation is as follows:

[0036] S1, real-time collection of the water inlet water pressure P of the water inlet of the gas water heater 进水 ;

[0037] Specifically, it is detected by a water pressure sensor arranged at the water inlet of the gas water heater;

[0038] S2, the inlet water pressure P in the S1 进水 Match the preset gas water heater start-up flow, and calculate the start-up flow V under the current water inlet pressure 开机 ;

[0039] Specifically, according to the inlet water pressure P 进水 and water pressure minimum P min and the maximum water pressure P max The relationship between the power-on flow V 开机 :

[0040] When P 进水 ≤P min when V 开机 =V min ;

[0041] When P 进水 ≥P max when V 开机 =V max ;

[0042] When P min...

Embodiment 2

[0056] Embodiment 2 of the present invention provides a zero cold water gas water heater, such as image 3 As shown, it includes a gas water heater body 1, a circulation pump 2, a water flow acquisition unit 3, a water pressure acquisition unit 4, a controller 5, a cold water pipe 6, a hot water pipe 7, and a water terminal 8. The circulation pump 2, water The flow collection unit 3 and the water pressure collection unit 4 are both arranged on the main waterway in the gas water heater body 1 and are connected to the controller 5. One end of the cold water pipe 6 is connected to the water source, and the other end is connected to the water terminal 8. One end of the hot water pipe 7 is connected to the gas water heater body 1 , and the other end is connected to the water end 8 .

[0057] The water flow acquisition unit 3 includes a water flow sensor.

[0058] The water pressure acquisition unit 4 includes a water pressure sensor.

[0059] The other ends of the cold water pipe...

technical field

[0001] The invention belongs to the technical field of gas water heaters, and in particular relates to a control method of a zero-cold water gas water heater and a zero-cold water gas water heater. Background technique

[0002] At present, there are two waterway installation methods for zero-cold water gas water heaters: one is a three-pipe scheme with cold water pipes, hot water pipes, and return water pipes; the other is a two-pipe scheme with only cold water pipes and hot water pipes. A one-way valve is installed at the washing table at the far water end to connect the cold and hot water pipes to prevent the backflow of hot water. For the two-pipe solution, the working principle of the zero-cold water gas water heater is: the preheating function is activated in the water-off state, and the internal circulation pump drives the cold and hot water pipes to circulate the water. When hot, the water stored in the cold water pipe flows into the water heater, flo...

Examples

Embodiment 1

[0035] Embodiment 1 of the present invention provides a control method for a zero-cooled gas water heater, such as Figure 1-2 As shown, it is used to prevent the gas water heater from being turned on by mistake, and the specific implementation is as follows:

[0036] S1, real-time collection of the water inlet water pressure P of the water inlet of the gas water heater 进水 ;

[0037] Specifically, it is detected by a water pressure sensor arranged at the water inlet of the gas water heater;

[0038] S2, the inlet water pressure P in the S1 进水 Match the preset gas water heater start-up flow, and calculate the start-up flow V under the current water inlet pressure 开机 ;

[0039] Specifically, according to the inlet water pressure P 进水 and water pressure minimum P min and the maximum water pressure P max The relationship between the power-on flow V 开机 :

[0040] When P 进水 ≤P min when V 开机 =V min ;

[0041] When P 进水 ≥P max when V 开机 =V max ;

[0042] When P min...

Embodiment 2

[0056] Embodiment 2 of the present invention provides a zero cold water gas water heater, such as image 3 As shown, it includes a gas water heater body 1, a circulation pump 2, a water flow acquisition unit 3, a water pressure acquisition unit 4, a controller 5, a cold water pipe 6, a hot water pipe 7, and a water terminal 8. The circulation pump 2, water The flow collection unit 3 and the water pressure collection unit 4 are both arranged on the main waterway in the gas water heater body 1 and are connected to the controller 5. One end of the cold water pipe 6 is connected to the water source, and the other end is connected to the water terminal 8. One end of the hot water pipe 7 is connected to the gas water heater body 1 , and the other end is connected to the water end 8 .

[0057] The water flow acquisition unit 3 includes a water flow sensor.

[0058] The water pressure acquisition unit 4 includes a water pressure sensor.

[0059] The other ends of the cold water pipe...

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