SU1663334A1 - Contact water heater - Google Patents

Abstract

The invention relates to energy and can be used in installations for heating water. The purpose of the invention is to reduce aerodynamic drag and heat transfer intensification. The water heater comprises an aerodynamic valve 6, a resonant tube 7 connected to the aerodynamic valve 6 and a burner 2. The resonant tube 7 is turned to the liquid level by its outlet end. The air duct 4 is connected on opposite sides to the aerodynamic valve 6 and the exhaust pipe 5 by means of an overflow pipe 8 with a nozzle 9, which leads an outlet section into the exhaust pipe 5. The case 1 is filled with water. Fuel and air are supplied for combustion. The water heater is outputted to the pulsating mode, with a hot gas stream flowing out of the resonant tube 7. The gas jet from pipe 7 destroys the water level, a rotating flow of a mixture of water, steam and gases is formed. Due to pulsations, the heat exchange is sharply intensified. Water for heating enters the housing 1 through the pipe 11, the exhaust pipe 5 and the nozzle 9. 3 Il.

Description

The invention relates to energy and can be used in installations for heating water.

The purpose of the invention is to reduce aerodynamic drag and heat transfer intensification.

FIG. 1 shows a contact water heater, a longitudinal section; in fig. 2 shows section A-A in FIG. one; in fig. 3 - water heater, general view.

The contact water heater comprises a housing 1 filled with a heated fluid, a combustion chamber 3 provided with a burner 2, connected to the latter air duct 4 and an exhaust pipe 5. The water heater further comprises an aerodynamic valve

6, the resonant tube 7, which is connected to the aerodynamic valve 6 and the burner device 2, and the outlet end facing the liquid level located in the upper part of the housing 1, the air duct 4 is placed on a part of the length in the housing 1 and is connected on opposite sides to the aerodynamic the valve 6 and the exhaust pipe 5, and with the last box 4 communicated by means of a bypass (pressure) pipe 8, brought into the exhaust pipe 5 output section, made in the form of a nozzle 9. Aerodynamic valve 6 and the inlet section of the overflow pipe s 8 are arranged coaxially. For ignition of the burner 2, a start-up electric flashlight 10 is provided. At the exhaust

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pipe 5 is installed pipe 11 cold water supply. In the exhaust pipe 5, an opening 12 is provided for the exit to the last combustion products from the housing 1 and to supply heated water there. Hot water is drained through the water outlet hole 13 in the housing 1 and the collector 14. A bottom cover 15 can be fixed to the bottom of the housing 1.

Contact water heater works as follows.

The device can operate in two modes as an autonomous heater and as a liquid heater in a pool, tank, tank by direct immersion,

Work in the first mode.

A bottom cover 15 is attached to the housing 1, in which case a closed cavity is formed in housing 1, which is pre-filled with water up to 3-5 CP-I above the combustion chamber 3. Then, starting air is supplied sequentially from the external source to the nozzle 9, electroswitch 10 is turned on, fuel is supplied to the burner 2. The water heater is brought to the pulsating operating mode, while hot gas is released from the resonance tube 7, which does not have any burns. The flow velocity is 20 ... 70 m / s, velocity pulsations with an amplitude of 10 ... 50 m / s, the frequency of pulsations 40 ... 70 Hz, temperature 800 ... 1200 ° С. Combustion air is sucked into the combustion chamber 3 by an aerodynamic valve 6 through the air duct 4, pulsations by the overflow pipe 8 are transmitted to the nozzle 9, and a vacuum is created by the exhaust pipe 5 through the exhaust hole 12 in the housing 1.

The main process of the water heater is blowing water droplets in the vortex flow created by the exhaust from the resonant tube 7 in the housing 1. The gas jet from the resonant tube 7 destroys the level of the aode, forming a rotating flow of a mixture of water, steam and gases. Due to pulsations, heat and mass transfer is sharply intensified. In addition, there is an intense heat removal from the surfaces of the combustion chamber 3 and the resonant tube 7. The output of the combustion products goes through the exhaust port 12 and then into the exhaust pipe 5. Hot water flows through the side of the housing 1 through the port 13 to the collector 14 and is discharged to the consumer. Cold water is supplied by a water nozzle 11, through pipe 5 it

flows down and through the hole 12 enters the housing 1.

Work in the second mode,

The cover 15 of the housing 1 is removed. The device is lowered into the volume of the treated liquid so that its level in the housing 1 is set as described above. It then starts up. Water is treated directly in bulk.

pool, tank, tank. Hot water, moreover, is freely drained from the collector 14.

The device provides the advantages of contact heating of the liquid with lower energy, fuel and structural costs than in the known contact water heaters.

The economic effect of a contact water heater is the ability to use liquid fuel without. the use of expensive gasification furnaces, devices capable of producing clean combustion products, since allows to burn fuel with small excesses of air without underburning; the rejection of high intake air fans typical of conventional contact heaters reduces the power consumption.

Claims (2)

1.Contact water heater, comprising a housing filled with a heated liquid, equipped with a burner device, a combustion chamber connected to The latter is an air duct and exhaust pipe, characterized in that, in order to reduce aerodynamic resistance and intensify heat exchange, it additionally contains aerodynamic the valve, the resonant tube, the latter of which is connected to the aerodynamic valve and the burner, and the outlet end facing the liquid level located in the upper part of the body, the air box is placed on a part of the length in the body and connected to opposite sides with the specified aerodynamic valve and exhaust pipe, and with the last box communicated through the bypass pipe, wound up in the exhaust pipe output section, made in the form of a nozzle. 2. The water heater according to claim 1, of which is an aerodynamic the valve and the inlet section of the bypass pipe are aligned. fig1 J-A fi $ .2 srig.Z