CN201680592U - Water temperature preheating device of gas water heater - Google Patents

Abstract

The utility model relates to a water temperature preheating device of a gas water heater, comprising a water heater, a water-heater water inlet, a water-heater water outlet, a gas inlet and a flue. The preheating device is characterized in that a sleeve pipe is arranged out the flue, and the end surfaces of the left head and the right head between the sleeve pipe and the gas pipe are closed. A level baffle plate is arranged in the space between the sleeve pipe and the flue, and a closed cavity is divided into an upper chamber and a lower chamber. One end of the upper chamber is provided with an upper chamber water inlet which is directly connected with a tap water pipe, and the same end of the lower chamber is provided with a lower chamber water outlet. The baffle plate of the other end of the cavity is provided with a draining passageway which is used for communicating the upper chamber with the lower chamber, and the lower chamber water outlet is connected with the water-heater water inlet by a water pipe. Tap water enters from the upper chamber water inlet, then flows to the lower chamber by a water flow passageway, and finally flows out from the lower chamber water outlet to enter into the water heater. The water temperature preheating device of the gas water heater utilizes the high temperature of the flue to preheat the tap water, so gas is saved, and the using cost is effectively reduced.

Description

A water temperature preheating device for a gas water heater

technical field

The utility model relates to a water temperature preheating device for a gas water heater, which is a technical improvement on the existing gas water heater.

Background technique

With the rapid development of today's science and technology, the demand for energy has experienced an unprecedented high-speed growth trend, the prices of oil and natural gas have risen sharply, the global energy is in short supply, and there are endless calls for energy conservation and emission reduction. A survey of gas water heaters used by urban residents found that: At present, many residents are using old-style gas water heaters. The wall is also very hot, so that a large amount of heat energy is lost, which not only increases the use cost, but also shortens the service life of the machine. Therefore, there is an urgent need to transform the exhaust pipes of these gas water heaters to better recover and utilize waste heat for the benefit of mankind, reduce air pollution, and achieve energy saving and emission reduction.

Chinese patent: application number 200810029950, application date 2008.08.04, discloses a condensing gas water heater, which is a fast water heater that utilizes both heat sources of flue gas sensible heat and water vapor latent heat, and is faster than traditional gas fast water heaters Has higher thermal efficiency. It has two heat exchangers, in addition to the sensible heat exchanger with ordinary gas water heaters, there is also a condensing heat exchanger. The superposition of the two parts of heat obtained by the sensible heat exchanger and the condensing heat exchanger makes its thermal efficiency much higher than that of ordinary water heaters. However, condensing gas water heaters are too expensive and consume more electricity. At such a high cost, the amount of gas it can save is too little. It is not as cost-effective as buying a general gas water heater. Empty technology, but can not bring considerable economic benefits. Residents can not achieve the purpose of saving money by purchasing and using them. Therefore, it is necessary to develop new technology products to achieve a win-win situation of energy saving and economic benefits.

Utility model content

The utility model discloses a water temperature preheating device for a gas water heater. The purpose of preheating the water temperature is achieved by reforming the smoke exhaust pipe, so as to overcome the high exhaust temperature of the existing gas water heater, the unusable waste heat, and the waste of energy. Exacerbating environmental pollution, shortening the service life of water heaters and other disadvantages.

A water temperature preheating device for a gas water heater, comprising a water heater, a water heater inlet, a water heater outlet, a gas inlet, and a smoke exhaust pipe, characterized in that the preheating device is provided with a casing outside the smoke exhaust pipe, and the casing is connected to the smoke exhaust pipe. The left and right annular end faces between the smoke exhaust pipes are sealed so that the preheated water in the annular space does not overflow. A horizontal baffle is set in the annular space between the sleeve pipe and the exhaust pipe to divide the airtight annular space into upper and lower 1. There are two lower chambers. One end of the upper chamber has an upper chamber water inlet, which is directly connected to the water pipe. The same end of the lower chamber has a lower chamber water outlet. Set up a drainage channel to connect the upper chamber with the lower chamber. The water outlet of the lower chamber is connected to the water heater inlet pipe through the water pipe. The water flows out from the water outlet of the chamber, enters the water heater, and uses the high temperature of the exhaust pipe to realize the preheating of the tap water.

A cross-shaped insert is fixed in the exhaust pipe.

The cross-shaped inserts are thin plate orthogonally welded to enhance the radiation heat transfer and convective heat transfer of flue gas.

The utility model makes the traditional smoke exhaust pipe of the water heater into the form of a jacket, and installs a water inlet and a water outlet at the same end of the jacket, the water inlet is connected to the water pipe, and the water outlet is connected to the water inlet of the gas water heater. The tap water is passed into the jacket, and the heat transfer effect is used to absorb part of the heat of the high-temperature flue gas discharged from the water heater, thereby increasing the temperature of the tap water in the pipeline, thereby increasing the water temperature at the water inlet of the gas water heater. , The energy consumed by the water heater is reduced.

The utility model makes full use of the waste heat of the smoke exhaust pipe to preheat the water entering the gas water heater, improves the temperature of the water entering the water heater, reduces the temperature of the smoke exhaust pipe, achieves the purpose of utilizing waste heat well, and saves gas, effectively The utilization efficiency of energy is improved, and the use cost is reduced.

Description of drawings

Fig. 1 is the schematic diagram of water temperature preheating device and gas water heater system;

Fig. 2 is a transverse sectional view of the water temperature preheating device;

Fig. 3 is a top half-sectional view of the water temperature preheating device;

Fig. 4 is a longitudinal sectional view of the water temperature preheating device;

Fig. 5 is a schematic diagram of the structure of the cross-shaped insert.

1. Water pipe, 2. Water inlet of upper chamber, 3. Preheating device, 4. Water outlet of lower chamber, 5. Water heater inlet pipe, 6. Smoke exhaust pipe, 7. Gas water heater, 8. Water heater outlet pipe, 9, cross-shaped plug-in, 10, sleeve pipe, 11, baffle plate, 12, drainage channel, 13, wall.

Detailed ways

Below in conjunction with accompanying drawing and embodiment the utility model is described in detail.

A water temperature preheating device for a gas water heater, as shown in Figure 1, Figure 2, and Figure 3, a gas water heater 7 is provided with a water heater inlet pipe 5, a water heater outlet pipe 8 and a smoke exhaust pipe 6, and the smoke exhaust pipe 6 is arranged on the gas Above the water heater 7, after turning a corner, it protrudes outside the wall 13. As shown in Figure 2, Figure 3, and Figure 4, the preheating device 3 is provided with a casing 10 on the smoke exhaust pipe 6, between the sleeve pipe 10 and the smoke exhaust pipe 6 The annular end faces of the left and right ends are sealed so that the preheated water in the annular space does not overflow. A baffle 11 is installed in the annular space between the sleeve pipe 10 and the exhaust pipe 6 to divide the airtight annular space into upper and lower. One end of the upper chamber is provided with an upper chamber water inlet 2, which is directly connected to the tap water pipe 1, and the same end of the lower chamber is provided with a lower chamber water outlet 4, and on the baffle plate 11 in the annular end surface of the other end A drainage channel 12 is provided to communicate the upper chamber with the lower chamber, and the water outlet 4 of the lower chamber is connected with the water inlet pipe 5 of the water heater. Tap water enters from the water inlet 2 of the upper chamber, flows to the other end of the upper chamber, flows to the lower chamber through the drainage channel 12, and finally flows out from the water outlet 4 of the lower chamber, and enters the gas water heater 7 through the water heater inlet pipe 5. Utilize the high temperature of the exhaust pipe 6 to realize the preheating of the tap water. The smoke exhaust pipe 6 has a built-in cross-shaped insert 9, as shown in Fig. 4 and Fig. 5 . The cross-shaped insert 9 is formed by orthogonal welding of two thin metal plates, and is fixed to the inner wall of the exhaust pipe 6 to enhance the radiation heat exchange and convection heat exchange of the flue gas.

Turn on the hot water faucet during use, the gas of the water heater will burn, the smoke exhaust pipe 6 will exhaust the smoke, the temperature of the smoke exhaust pipe will rise, and the tap water will enter the upper chamber through the water inlet 2 of the upper chamber, and after passing through the upper chamber, it will flow to the upper chamber. The other end enters the lower chamber through the drainage channel 12 provided on the end baffle, flows out through the water outlet 4 of the lower chamber, and completes the preheating process by using the residual heat of the smoke exhaust pipe 6, and finally enters the water heater inlet pipe 5 to reach The gas water heater 7 is heated, and then water is discharged through the water heater outlet 8 for use by users.

Claims (3)

1. A water temperature preheating device for a gas water heater, comprising a water heater, a water heater water inlet, a water heater outlet, a gas inlet and a smoke exhaust pipe, characterized in that: the described preheating device is provided with a sleeve pipe outside the smoke exhaust pipe. The left and right annular end faces between the pipe and the exhaust pipe are sealed, and a horizontal baffle is set in the annular space between the sleeve pipe and the exhaust pipe to divide the enclosed annular space into upper and lower chambers. One end of the chamber has an upper chamber water inlet, which is directly connected to the tap water pipe, and the same end of the lower chamber has a lower chamber water outlet, and a drainage channel is set on the baffle in the ring-shaped end face of the other end, so that the upper chamber and The lower chamber is connected, and the water outlet of the lower chamber is connected with the water inlet of the water heater through a water pipe. After the tap water enters from the water inlet of the upper chamber, it flows to the lower chamber through the drainage channel, and finally flows out from the water outlet of the lower chamber to enter the water heater. 2 . The water temperature preheating device for a gas water heater according to claim 1 , wherein a cross-shaped insert is fixedly connected to the exhaust pipe. 3 . 3. A water temperature preheating device for a gas water heater according to claim 2, characterized in that the cross-shaped insert is a thin plate and is welded orthogonally.

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