CN218096555U - An energy-saving gas water heater - Google Patents

Abstract

The utility model discloses an energy-saving gas water heater, which comprises a gas furnace, a circulating water pump, a residual water recovery pump and a spare water tank; The first electromagnetic valve; the hot water pipe is connected with a circulating water pipe, and the water outlet end of the circulating water pipe is connected with the water inlet end of the heating pipe; the second electromagnetic valve and the circulating water pump are arranged on the circulating water pipe; the water outlet end of the circulating water pump is connected with the inlet of the standby water tank The water pipe is provided with a pressure valve on the water inlet pipe; the outlet end of the circulating water pump is also connected with a cold water pipe, and the cold water pipe is connected with the outlet pipe of the standby water tank, and a residual water recovery pump is arranged on the outlet pipe; the utility model utilizes the circulating water pump to draw back hot water The cold water in the pipe is temporarily stored in the spare water tank, and the return pipe is no longer laid, which reduces the cost; the cold water in the spare water tank is pressed into the water inlet pipe of the gas furnace through the residual water recovery pump for recycling, avoiding the waste of water; Use gas when using water to avoid waste of gas.

Description

An energy-saving gas water heater

technical field

The utility model relates to the technical field of water heaters, in particular to an energy-saving gas water heater.

Background technique

The "zero hot water" of gas water heaters on the market is mainly realized in two ways: 1. If the return water pipeline is installed, the temperature sensor is used to control the water temperature. When hot water is not used, the heat loss temperature of the water pipe is reduced, and the thermostat is activated The circulating water pump and the gas furnace work, and stop working after the water is heated to the set temperature. Such frequent start and stop is a serious waste of gas; 2. If there is no return pipe installed, the working principle is the same as that with the return pipe. In addition, there is also the situation that the water in the cold water pipe cannot be pumped back, and it will be wasted every time it is used. Plenty of cold water.

Utility model content

The purpose of this utility model is to provide an energy-saving gas water heater to solve the problems raised in the above-mentioned background technology.

In order to achieve the above object, the utility model provides the following technical solutions:

An energy-saving gas water heater, comprising a gas furnace, a circulating water pump, a residual water recovery pump, and a spare water tank. The water heater is provided with a hot water tap; A hot water pipe is provided, and a first solenoid valve is arranged on the hot water pipe; a circulating water pipe is connected to the hot water pipe, and the water inlet end of the circulating water pipe is respectively connected to both ends of the first solenoid valve, and the water outlet end of the circulating water pipe is connected to the heating The water inlet end of the pipe is connected; the circulating water pipe is provided with a circulating water pump for drawing back the cold water in the hot water pipe, and the water inlet end of the circulating water pump is provided with a second solenoid valve; the circulating water pipe is connected with the water inlet pipe of the spare water tank And the connection point is located at the water outlet end of the circulating water pump, and a pressure valve is arranged on the water inlet pipe; the cold water pipe for external water source to flow into the internal heating pipe of the gas furnace is also connected to the said circulating water pipe, and the connection point is located at the water outlet end of the circulating water pump; The cold water pipe is connected with an outlet pipe of a spare water tank, and a residual water recovery pump is arranged on the outlet pipe.

An air blocking switch is arranged between the water outlet end of the first electromagnetic valve and the water inlet end of the second electromagnetic valve.

A water level switch and a float for controlling the opening and closing of the water level switch are arranged in the standby water tank.

An air balance valve is also arranged on the standby water tank.

The water inlet end of the cold water pipe is provided with a first check valve, and a second check valve is provided between the standby water tank and the residual water recovery pump.

The energy-saving gas water heater also includes a combustion chamber, and the backup water tank is arranged around the combustion chamber.

The beneficial effects of the utility model are:

1. Use the circulating water pump to draw back the cold water in the hot water pipe and temporarily store it in the spare water tank. There is no need to lay a return pipe, which reduces the cost; the water can only be released from the hot water tap after the water is heated to the set temperature, and the circulating water pump is turned off when the hot water is released. , The cold water in the spare water tank is pressed into the water inlet pipe of the gas furnace through the residual water recovery pump for recycling to avoid water waste; the water heater only uses gas when hot water is used, thereby avoiding waste of gas.

2. The spare water tank is placed around the combustion chamber, which can not only reduce heat loss, but also protect the water heater shell from cooling.

3. The air blocking switch can effectively block the air from entering the water pipe.

Description of drawings

Fig. 1 is the pipeline schematic diagram of the present utility model;

Fig. 2 is a partial circuit diagram of the utility model.

In the figure: a, hot water faucet; b, first solenoid valve; c, air blocking switch; d, second solenoid valve; e, circulating water pump; f, residual water control pressure valve; g, spare water tank; h, air Balance valve; i, floating ball; j, residual water recovery pump; k, first check valve; l, gas furnace; m, water level switch; n, second check valve.

detailed description

The technical scheme of the utility model is further described in detail below in conjunction with the accompanying drawings, but the protection scope of the utility model is not limited to the following description.

Please refer to Figures 1 to 2, an energy-saving gas water heater is provided in an embodiment of the utility model, including a gas furnace l, a circulating water pump e, a residual water recovery pump j and a spare water tank g, and a hot water faucet a is arranged outside the water heater; A hot water pipe is arranged between the water outlet end of the heating pipe in the gas furnace l and the hot water faucet a, and the first electromagnetic valve b is arranged on the hot water pipe; a circulating water pipe is connected to the hot water pipe, and the water inlet ends of the circulating water pipe are respectively Connected to both ends of the first electromagnetic valve b, the water outlet end of the circulating water pipe is connected with the water inlet end of the heating pipe; the second electromagnetic valve d and the circulating water pump e are arranged on the circulating water pipe, when the second electromagnetic valve d and the circulating water pump e are opened , the cold water in the hot water pipe will be drawn out and sent back to the water inlet end of the heating pipe.

The first solenoid valve b in this embodiment is a temperature-controlled solenoid valve.

The circulating water pipe is connected to the water inlet pipe of the spare water tank g, and the connection point is located at the outlet end of the circulating water pump e. The water inlet pipe is provided with a residual water control pressure valve f. The cold water extracted from the water pipe is pressed into the standby water tank g by the circulating water pump e.

The circulating water pipe is also connected with a cold water pipe for the external water source to flow into the internal heating pipe of the gas furnace 1, and the connection point is located at the water outlet of the circulating water pump e; There is surplus water recovery pump j.

Furthermore, the water outlet end of the first electromagnetic valve b and the water inlet end of the second electromagnetic valve d are provided with an air blocking switch c, which can effectively block air from entering the water pipe.

Further, a water level switch m and a float i for controlling the opening and closing of the water level switch m are arranged in the reserve water tank g.

Furthermore, the spare water tank g is also provided with an air balance valve h, which can automatically adjust the air pressure in the spare water tank g according to the water level, and prevent the water from overflowing.

Further, the water inlet end of the cold water pipe is provided with a first check valve k to prevent circulating water from entering the cold water pipe; a second check valve n is provided between the spare water tank g and the residual water recovery pump j to prevent the cold water from flowing back to the spare water pipe. water tank g.

Furthermore, the energy-saving gas water heater also includes a combustion chamber, and the spare water tank g is arranged around the combustion chamber, which can not only reduce heat loss, but also protect the water heater casing from cooling.

One, the working process of the utility model

Referring to Figure 1, the hot water faucet a is turned on, the water pressure drops, the gas furnace l starts heating (this part is the existing function of the existing controller), and at the same time the second electromagnetic valve d and the circulating water pump e are turned on (can be obtained from the existing controller The control line is drawn from the front end of the ignition coil), the water pressure in the working pipeline of the circulating water pump e increases, and the cold water in the hot water pipe is pumped out, and then sent back to the gas furnace for heating. When the incoming water exceeds the preset pressure, the remaining water Control the pressure valve f to open, and press excess cold water into the spare water tank g; when the cold water in the hot water pipe is pumped out, the air blocking switch c can prevent air from entering the circulation pipeline in the gas furnace l.

When the gas furnace l heats the water to the set temperature, the first electromagnetic valve b is opened, hot water is output from the hot water tap a, at the same time the second electromagnetic valve d and the circulating water pump e are closed, the residual water recovery pump j is turned on, and the spare water tank g The cold water in the gas furnace is pressed into the gas furnace l; when the water level in the spare water tank g drops to the set height, the float i disconnects the water level switch m, turns off the remaining water recovery pump j, and the second check valve n stops the cold water Return flow into backup tank g. During this process, the air balance valve h automatically adjusts the air pressure in the spare water tank g according to the water level in the spare water tank g. During the whole use process, when the water pressure in the water heater is higher than the external water pressure, the first check valve k is closed, and when the water pressure in the water heater is lower than the external water pressure, the first check valve k is opened to realize automatic Ingress of water.

After the hot water is used, the hot water tap a is closed, the first electromagnetic valve b is closed, and the gas furnace 1 stops working simultaneously.

Two, the electrical control principle of the utility model

See Figure 2, take the control power supply at the front of the ignition coil:

One way supplies power to the coil of the second solenoid valve d and the coil of the control relay of the circulating water pump e through the normally closed contact of the relay of the first solenoid valve b, so that the working power passes through the normally open contact of the second solenoid valve d and the control relay of the circulating water pump e point, the first solenoid valve b starts and stops the circulating water pump e.

The other path supplies power to the coil of the control relay of the residual water recovery pump j through the normally open contact of the relay of the first solenoid valve b and the normally closed contact of the water level switch m, so that the working power passes through the normally closed contact of the control relay of the residual water recovery pump j Open the contact, turn on the residual water recovery pump j to work, the water level of the water tank drops to the set height, the float i disconnects the normally closed contact of the water level switch m, and the residual water recovery pump j stops working.

In the utility model, the circuit for controlling the working state of the gas stove 1 by opening and closing the hot water tap a is consistent with the circuit of conventional water heaters on the market, which is a prior art, so it will not be described in detail here.

Three, the selection and parameters of each part in the utility model

1. The volume of the spare water tank g: determined according to the inner volume of the farthest section of the domestic hot water pipe from the water heater (recommended 15 meters). The hot water pipe is a PPR pipe with a specification of dn25*2.8, and the volume is: 150dm*3.14*[(0.25-0.028*2)/2]²=4.43 liters. When using it, the cold water in the adjacent pipe is taken into account and the standby The g of the water tank and the heat preservation effect on the combustion chamber should be appropriately increased.

2. Circulating water pump e: The working pressure should be 1.5 times higher than the inlet water pressure, that is, greater than or equal to 0.6MPa, in order to ensure the normal operation of the residual water control pressure valve f. The working flow rate of the pump should be based on the gas furnace l. When the cold water in the heating pipe is heated to the set water temperature, it is advisable that the pump can completely pump the cold water in the hot water pipe.

3. Residual water recovery pump j: The working pressure should be 1.5 times higher than the inlet water pressure, that is, greater than or equal to 0.6MPa. The working flow rate of the pump should be based on the shortest time that family members use hot water. It is advisable that the pump can pump the cold water in the spare water tank g to the set water level in advance.

4. Air balance valve h: Use a hard wear-resistant ball with a specific gravity smaller than water and a water outlet with a circular arc groove. When water enters the open tube cavity, the ball is suspended, the water flows through, and no water enters In the open tube cavity, the ball falls to the arc groove due to gravity, seals the nozzle and prevents air from entering.

The above descriptions are only preferred implementations of the present utility model, and it should be understood that the present utility model is not limited to the form disclosed herein, and should not be regarded as excluding other embodiments, but can be used in various other combinations, modifications and environments , and can be modified within the scope of the ideas described herein by the teachings above or by skill or knowledge in the relevant art. However, changes and changes made by those skilled in the art do not depart from the spirit and scope of the utility model, and should all be within the protection scope of the appended claims of the utility model.

Claims (6)

1. An energy-saving gas water heater, characterized in that: it comprises a gas furnace, a circulating water pump, a residual water recovery pump and a spare water tank, the outside of the water heater is provided with a hot water tap; the gas furnace is provided with a heating pipe, and the water outlet of the heating pipe A hot water pipe is set between the hot water tap and the hot water pipe, and a first solenoid valve is arranged on the hot water pipe; a circulating water pipe is connected to the hot water pipe, and the water inlet ends of the circulating water pipe are respectively connected to both ends of the first solenoid valve, and the circulation The outlet end of the water pipe communicates with the water inlet end of the heating pipe; the circulating water pipe is provided with a circulating water pump for extracting cold water from the hot water pipe, and a second solenoid valve is provided at the water inlet end of the circulating water pump; the circulating water pipe is connected with The water inlet pipe of the spare water tank and its connection point are located at the water outlet end of the circulating water pump, and a pressure valve is arranged on the water inlet pipe; the cold water pipe for the external water source to flow into the internal heating pipe of the gas furnace is also connected to the said circulating water pipe, and the connection point is located at the circulating water pipe. The outlet end of the water pump; the cold water pipe is connected with the outlet pipe of the spare water tank, and the outlet pipe is provided with a residual water recovery pump. 2. The energy-saving gas water heater according to claim 1, characterized in that: an air blocking switch is provided between the water outlet end of the first electromagnetic valve and the water inlet end of the second electromagnetic valve. 3. The energy-saving gas water heater according to claim 1, characterized in that: a water level switch and a float for controlling the opening and closing of the water level switch are arranged in the backup water tank. 4. The energy-saving gas water heater according to claim 1, characterized in that: an air balance valve is also arranged on the spare water tank. 5. An energy-saving gas water heater according to claim 1, characterized in that: the water inlet end of the cold water pipe is provided with a first check valve; a second check valve is provided between the backup water tank and the residual water recovery pump. check valve. 6. The energy-saving gas water heater according to claim 1, characterized in that: the energy-saving gas water heater further comprises a combustion chamber, and the backup water tank is arranged around the combustion chamber.

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