CN106679152A - Instantaneous gas water heater - Google Patents

Abstract

The invention relates to an instant gas water heater, which is composed of three parts: a gas heating device, a temperature control system and a liquid level control system; One two-position three-way solenoid valve, two two-position three-way solenoid valves lead to two branches, one is connected to the cold water pipe inlet of the gas heating device through the return pipeline to connect the return pump, in order to realize the cold water recycling and reheating in the pipe at the initial stage of the water heater startup; The other one connects the water pipe to the end faucet, and this branch is also connected with a liquid level control system in parallel, in order to realize the instant hot water supply at the beginning of the water heater and the recovery of the hot water in the pipeline after the water is used. The temperature control system makes power on/off judgments according to the water temperature in the water pipe and supplies power to the feed water pump, return pump and two-position three-way solenoid valve at the same time. The invention has simple structure and strong applicability, especially for the working condition of "frequency switch, short switch-on", the water-saving effect is obvious.

Description

Instantaneous gas water heater

technical field

The invention relates to the field of gas water heaters, in particular to an instant energy-saving gas water heater.

Background technique

In response to the national call for energy conservation and emission reduction, conservation has become a problem that everyone has to seriously face and think about in their daily lives. Nowadays, with the improvement of people's living standards, water heaters have become an essential household appliance in life, especially instant water heaters, which can produce hot water immediately, and are not limited to the number of people, and have become the first choice of many families and shops. Now the mature instant water heaters on the market are basically divided into two categories: electric water heaters and gas water heaters. Most electric water heaters use high-power electric heating equipment to directly convert electric energy into heat energy. In terms of energy quality, it is not cost-effective to convert electricity into heat, and the power consumption is astonishing, often reaching more than 15kw. Gas instant water heaters use combustion to heat cold water, which is more energy-efficient, and the price of gas is much cheaper. However, gas water heaters have an obvious disadvantage, that is, they start slowly and need to continue to supply cold water for a while (about 20 seconds) before they can work stably. . Then, for the frequent switching, short water supply, and large number of people, such as toilets and barbershops, it is difficult to supply hot water in time, and we can only wait for the cold water to be lost countless times until the gas water heater starts up, which is very unreasonable.

Invention patent CN104913512A is based on electric heating technology, and discloses a "multi-heating cup combined heating device", which can realize immediate heating of cold water and mixed water flow out with pipe valves and control components, but the water heater still uses electric heating in the final analysis, and does not have Solve the problem of huge power consumption. Among the existing disclosed water heater technologies, the patent CN203757992U discloses an instant water heater based on a spiral magnetic field. In principle, the technical content of this water heater belongs to electromagnetic heating technology, which saves 70% of electricity compared with electric water heaters. There are very few manufacturers of electromagnetic water heaters in China, and the key technical indicators are not clear, and there is still a distance from wide application. The newer air water heaters currently on the market are similar in principle to the heating block of an air conditioner. The heating coefficient of water heaters with better quality can reach 3.7 or even 4, saving more than 70% of electricity than traditional electric water heaters. The common problem of thermal water heaters is that the capacity is limited and needs to be re-burned when it is used up. It can be seen that after market testing, gas water heaters are still one of the most popular water heaters on the market, because of their good heating stability, relative energy saving, and the price of gas is lower than the price of electricity. A series of factors determine its high market share. . Its defects - slow start, waste of cold water during the start process, etc. If the problems can be effectively improved, then the gas water heater will have greater use value. All in all, gas water heaters have more potential for improvement.

Contents of the invention

technical problem to be solved

In order to avoid the use of electric heating technology that consumes a lot of power, and make the system as simple as possible, it is widely applicable to households, barber shops, etc. that need to be frequently switched on and off under the condition of ensuring temperature, the present invention proposes an instant heating Type gas water heater, through the cooperation and connection of the electric heating device with the temperature control system and the liquid level control system mechanism, it can realize instant hot water, especially for the working conditions of "frequency switch, short opening", which can effectively save cold water and further improve gas utilization.

Technical solutions

The solution adopted by the present invention to solve the technical problem is: a temperature control system and a two-position three-way solenoid valve are sequentially arranged downstream of the water outlet pipeline of the gas heating device. The pipe connects the return pump to the inlet of the cold water pipe of the gas heating device. In order to realize the recycling and reheating of the cold water in the pipe at the beginning of the water heater start-up, the other pipe is connected to the end faucet. The faucet branch downstream of the two-position three-way solenoid valve is connected in parallel with the liquid level control system, in order to realize the immediate water supply at the beginning of the water heater start-up and the recovery of hot water in the pipeline after the water is used.

The temperature control system is composed of an external power supply, a temperature control switch, a first relay, a two-position three-way solenoid valve, a second relay, a return pump, and a third relay. Among them, the temperature control switch needs an external power supply. Compared with the traditional switch, it has one more thermocouple switch connected in series, and the thermocouple contact piece is blocked and fixed in the water pipe, which can realize the power on and off action of the switch according to the water temperature. When the water temperature is lower than the comfortable temperature, define the temperature control power supply to be energized, when the water temperature reaches the comfortable temperature, define the temperature control power supply to be powered off, the temperature control switch supplies power to the two-position three-way solenoid valve through the first relay, and define the two-position three-way solenoid valve When the valve is energized, the backflow gear is cut, and when the power is turned off, the valve is cut straight out of the gear. At the same time, the temperature control switch is connected to the water feed pump through the second relay, and connected to the return pump through the third relay. Realize that at the beginning of the start-up of the water heater, the cold water circulates in the return pipe, and the hot water is provided by the heat preservation water tank drawn by the feed water pump. When the water temperature in the water pipe is suitable, the two-position three-way solenoid valve is controlled and cut until hot water flows out, and the normal and continuous use thereafter is no different from the working process of a traditional gas water heater.

The liquid level control system includes an insulated water tank, a liquid level sensor, a single-chip microcomputer module, an electromagnetic valve, an AC power supply, a power adapter, an amplifier, a feed water pump, a pressure one-way valve, an electromagnetic valve, and several pipelines; the liquid level sensor The air pipes, air pipes and water pipes are respectively fixed at the blockage of the water tank and sealed with a sealing ring. The inner end of the water pipe touches the bottom of the water tank, and the outer end is connected to the feed water pump. The inner end of the gas pipe is higher than the high liquid level of the water tank, and the outer end is connected with a normally open electromagnetic valve to realize pressure balance in the process of changing the liquid level and airtight heat preservation after water storage. The liquid level sensor is specifically a liquid level switch with high and low dual probes supported by a flange and a bracket shaft. The high and low liquid level limits can be customized according to the needs. In order to control the electric action on the electromagnetic valve to make it close; when the water level is below the upper limit due to the change of water supply or water supply, define the low level of the output of the single-chip microcomputer, and control the opening of the electromagnetic valve to ensure pressure balance.

Beneficial effect

Compared with the traditional gas water heater, the gas water heater has the following advantages:

1. For public places with a large flow of people, especially barbershops, storage-type water heaters are difficult to meet a large number of needs, and users use water for a short time. Most of the time, users would rather choose to drain the cold water and wait for the water heater to start before using it. This gas water heater is just to meet the working condition of "short opening, frequent switching" as the starting point. On the one hand, it will not cause frequent switching of the gas water heater under the working condition of high-frequency switching faucets; on the other hand, it ensures the saving of cold water. .

2. The present invention solves the problem that traditional instantaneous water heaters cannot be separated from high-power electric heating, greatly reduces the risk of excessive electrical load on equipment during peak periods of electricity consumption, and also reduces the cost of daily use.

3. The structure of the present invention fundamentally makes up for the slow start-up problem of the gas water heater, and is not limited to the specific model and start-up speed of the water heater, and is generally applicable to various working conditions and has wide applicability.

Description of drawings

Figure 1: Block diagram of the overall system structure;

Figure 2: Liquid level control mechanism;

Figure 3: Temperature control mechanism;

Figure 4: The principle block diagram of the system mechanism;

In the figure: 1. Gas water heater 2. Gas water heater heating module 3. Temperature control module 4. AC power supply 5. Feed water pump 6. Hot water 7. Liquid level control module 8. Heat preservation water tank 9. Electromagnetic gas valve 10. Air pipe 11. Pressure one-way valve 12. Return water pipe 13. Return pump 14. Two-position three-way solenoid valve 15. Faucet 16. First relay 17. Second relay 18. Third relay 19. Single-chip microcomputer module 20. Power amplifier 21. Sealing device 22. Water tank plugging 23. Water supply pipe 24. Adapter 25. One-way valve protection mechanism

detailed description

This embodiment is an instant gas water heater.

Referring to Fig. 1 and Fig. 4, a gas-fired instant water heater in this embodiment consists of a gas-fired water heater 1, a gas-fired water heater heating module 2, a temperature control module 3, a 220V AC power supply 4, a water supply pump 5, hot water 6, liquid Bit control module 7, heat preservation water tank 8, electromagnetic gas valve 9, pressure balance air pipe 10, pressure one-way valve 11, return water pipe 12, return pump 13, two-position three-way solenoid valve 14, faucet 15, first relay 16, The second relay 17, the third relay 18, the single-chip microcomputer module 19, the amplifier 20, the sealing device 21, the water tank plugging 22, the water pipe 23, the adapter 24, and the one-way valve protection mechanism 25; A temperature control module 3 and a two-position three-way electromagnetic reversing valve 14. Of the two outlets of the two-position three-way solenoid valve 14, the A port is connected to the water inlet of the gas heating module through the return pump, and the B port is directly connected to the end faucet. 15. Connect the liquid level control system in parallel on the branch road drawn from port B. It should be noted that the water inlet and outlet of the built gas water heater are all externally rotated four-point water pipes, so the return pump 13 and the three-way nozzle need to be unified with four-point pipe adapters, and a sealing plastic bag is used together to ensure that the pressure is maintained under actual pressure. Watertight.

Referring to Figure 1 and Figure 2, first connect the AC power supply 4 to the gas water heater 1 and the temperature control module, wherein the gas pipeline, water pipe, flue gas pipeline, and gas heating module 2 belong to the original materials of ordinary gas water heaters and need not be described in detail. The temperature control module includes a temperature sensor 3, a first relay 16, a second relay 17, and a third relay 18. The inductive thermocouple of the temperature sensor is fixed and embedded in the inner side of the screw plug, and screwed into the three outlets of the waterway outlet of the gas heating module. In the pipeline, the temperature control switch can be turned on and off according to the water temperature in the water pipe. The two-position three-way solenoid valve 14 is connected downstream of the temperature control module, and the power is switched to the A gear to realize turning on and off through the return pump 13. Enter the water pipe inlet at the front end of the gas heating module 2, turn off the power and switch to the B gear, so as to realize direct flow out from the faucet 15. The temperature control switch 3 supplies power to the two-position three-way solenoid valve 14 through the first relay 16, supplies power to the water supply pump 5 through the second relay 17, and supplies power to the return pump 13 through the third relay 18, so as to realize that the gas water heater 1 has just been turned on. When the cold water circulates back, the hot water is supplied by the water tank 8 in time. When the water temperature in the water pipe rises to an appropriate temperature, the two-position three-way solenoid valve 14 switches to the B line and flows out directly. Begin to store water for water tank 8.

Referring to Fig. 1 and Fig. 3, the plugging cover of the insulated water tank is fixedly equipped with a four-point water pipe 23, a liquid level sensor 7 and two air-point pipes 10 and is sealed by a sealing ring 21; wherein the inner end of the air pipe 10 is placed above the highest liquid level of the water tank, The outer end fixes the electromagnetic gas valve 9 through a snap ring, which can realize the dual functions of heat preservation and pressure balance. The inner end of the water pipe is in contact with the bottom of the water tank, and the outer end leads to the feed water pump 5 and is connected in parallel to the B branch of the two-position three-way valve. At the same time, the pressure one-way valve 11 and the feed water pump 5 are connected in parallel and reversed to ensure that the water channel can achieve effective water pumping and Effective watering. The liquid level sensor 7 is specifically a liquid level switch with high and low dual probes, and the high and low liquid level limits are determined by oneself. When the water level touches the high level probe, the liquid level switch gives a signal through the single-chip microcomputer 19 and the amplifier 20. The control electricity acts on the electromagnetic The gas valve 9 makes it close; when the water level is below the upper limit due to the change of water supply or water supply, the liquid level switch controls the electromagnetic gas valve 9 to open to ensure pressure balance. It can be realized that just after the faucet 15 is turned on, the water supply pump 5 starts pumping water so that the hot water 6 can be supplied immediately; in addition, after the water is used, the faucet 15 is closed, and the water tank 8 starts to store water through the pressure one-way valve 11, and the electromagnetic gas valve 9 is closed after reaching the upper limit water level , the water tank 8 is in the airtight and stable pressure so that the water storage process ends.

The instant gas water heater designed in the present invention adopts the method of temperature control module to jointly control the electromagnetic reversing valve, recycles and saves the cold water wasted due to the slow start of the water heater, and realizes the water tap by means of the water storage device and the liquid level control system Hot water comes out immediately, and after use, close the faucet to restore water storage, reducing the frequent start-up of the gas water heater caused by frequent switching of the faucet.

Claims (3)

1. a kind of Instant heating type gas heater, by gas-operated thermal bath facility, temperature control system, tank level control system three parts group Into；It is characterized in that：In gas-operated thermal bath facility outlet conduit downstream, order installs a temperature control system and one two three Three-way electromagnetic valve, two-bit triplet electromagnetic valve draw two branch roads, and one is accessed gas-operated thermal bath facility by reflux line connection reflux pump Cold water tube inlet realizing cold-water reflux, another connecting water pipe to end faucet, while two-bit triplet electromagnetic valve downstream Faucet branch road on tank level control system in parallel realizing i.e. hot water outlet.

2. a kind of Instant heating type gas heater according to claim 1, it is characterised in that described temperature control system by External power supply, temperature detect switch (TDS), the first relay, two-bit triplet electromagnetic valve, the second relay, reflux pump, the 3rd relay group into； Wherein temperature detect switch (TDS) needs external power supply to power, its thermocouple contact of having connected than inside traditional switch, by thermocouple more Contact fixes closure inside gas-operated thermal bath facility outlet pipe, can be realized according to water temperature triggering temperature on the basis of external power supply Control switches on-off electronic work；The first relays of Jing connect two-bit triplet electromagnetic valve to the temperature detect switch (TDS) of connection external power supply all the way, The second relays of Jing connect the feed pump of tank level control system all the way, all the way the backflow in the 3rd relays of Jing connection reflux pipe Specifically one solenoid directional control valve for being connected to temperature control module downstream of pump, wherein two-bit triplet electromagnetic valve, electrically connects back in definition Stream branch road, power-off connect straight out branch, are capable of achieving to carry out pipeline switching by the power on/off action of temperature detect switch (TDS).

3. the Instant heating type gas heater of a kind of type according to claim 1, it is characterised in that the tank level control system by Heat preservation storage water tank, liquid level sensor, single-chip microcomputer module, electromagnetic gas valve, alternating current power supply, power supply adaptor, amplifier, feed pump, Pressure one-way valve and electromagnetic gas valve and some pipelines composition；Fixation wherein on storage tank capping is inserted with trachea, water pipe and liquid level By sealing ring sealing, sensor, three's interface all guarantee that heat insulation effect is good；Trachea is higher than highest liquid in water tank inner end positions Position, outer end connection electromagnetic gas valve, water pipe end in contact water tank bottom in the water tank, outer end are connected to two-bit triplet electricity through feed pump The straight out branch in magnet valve downstream, pressure one-way valve and feed pump reverse parallel connection can realize the smooth of cistern water supply and water-retention process Carry out；Wherein liquid level sensor be specially one by ring flange and support shaft be supported in water tank capping with high-low-position dual probe Liquid-level switch, liquid level sensor holding wire is ultimately attached to the electromagnetism gas on trachea through single-chip microcomputer, amplifier and relay Valve, wherein exporting high/low level to the definition of single-chip microcomputer module when liquid level touches specified water level, amplified device and relay are realized Control system of switching on or off electricity to electromagnetic gas valve；In the tank level control system, liquid level sensor, single-chip microcomputer module are needed by alternating current Source Jing power supply adaptor switching continued powers.