CN201351990Y - Instant heating type double-core electric water heater - Google Patents

Abstract

The utility model discloses an instant preheating type dual-core electric water heater. The electric water heater comprises a preheating heating liner connected with a water inlet, a preheating heating pipe positioned in the preheating heating liner, an instant heating liner connected with a water outlet, and an instant heating pipe positioned in the instant heating liner, wherein the preheating heating liner and the instant heating liner are communicated by an upper communicating pipe and a lower communicating pipe. In addition, a sleeve is arranged outside the instant heating pipe, the upper end of the sleeve is open, and gaps are reserved around the lower end of the sleeve. The utility model discloses combined instant heating type electric water heater and preheating type electric water heater's characteristics, can realize the heating mode of three kinds of differences, the user can carry out power selection according to the needs of water and switch over the mode of heating, produces required hot water in the less electric water heater of volume, reaches pleasing to the eye, convenient, safe, energy-conserving requirement.

Description

A pre-instant dual-core electric water heater

technical field

The utility model relates to the field of electric water heaters. More specifically, the utility model relates to a preheating instant dual-core electric water heater.

Background technique

Existing electric water heaters are mainly divided into instant heating type and preheating type according to heating methods. Among them, the preheating type electric water heater can heat and store water in advance, has low power and large water volume, but has a large volume and long heating time, and needs to be heated for at least 1 hour in advance, so it cannot be used immediately. The instant electric water heater can be used immediately, fast heating, small size, and easy to use, but it is greatly affected by the ambient temperature, especially in the northern winter when the water temperature is not enough. To achieve the ideal water temperature, the power is generally 6-8 kilowatts , General household wires are not suitable for installation and use.

At present, in the design of electric water heaters, it is generally considered to combine the characteristics of the instant heating type and the preheating type to meet people's different needs for water heaters in different situations. For example, the patent application number is 200720113576.4, which is called a preheating energy-saving electric water heater (see Figure 1), and discloses a kind of electric water heater. There are heating tubes with different powers in the inner tanks, and the two inner tanks are connected through an inner tank connecting pipe to realize the exchange and flow of water between the two inner tanks. The electric water heater disclosed in this patent has two working modes. One working mode is that the heating tube of the preheating inner tank first heats the water, and when the water is used, the preheating heating tube stops working, and the heating tube of the instant inner tank heats the water again. Another working mode is that the heating tube of the preheating type liner does not work and is only used as a pipeline, and only the heating tube of the instant heating type liner works. The problem that this water heater exists is: (1) instant heat heating pipe power must be big, and easy fouling is easy dry burning. Because under the second mode of operation, the water heater is used as an instant water heater, so its instant heating tube must have a large power, generally 4.5 to 8 kilowatts, which consumes a lot of energy. And the instant heating pipe is installed on the top of the instant inner tank, because the local high temperature is easy to burn dry and the heating pipe fouls, seriously affecting the safety of the water heater. (2) The water mixing effect between the two gallbladders is very poor. There is only a slender inner tank connecting pipe between the two tanks of this water heater to exchange water between the two tanks. When the first working mode is enabled, the water in the preheated inner tank is difficult to be sent to The instant hot tank is mixed with the cold water in the preheated tank. That is to say, two inner tanks are designed to achieve the purpose of preheating and instant heating twice. Because the water mixing effect is too poor, its effect is greatly weakened.

Utility model content

The utility model aims at the problems existing in the prior art, and provides an electric water heater which is more energy-saving and safe, and has a better water mixing effect between the two tanks.

The scheme adopted by the utility model to solve the above problems is:

A preheating type dual-core electric water heater, comprising: a preheating heating tube connected to a water inlet and a preheating heating tube located inside the preheating heating tube, and an instant heating tube connected to a water outlet and located in the instant heating tube The inner instant heating tube, the preheating heating liner and the instant heating liner are connected by two upper and lower communication pipes.

Preferably, it also includes a sleeve sleeved outside the instant heating tube.

The upper end of the sleeve is open, and gaps are left around the lower end.

Wherein, an adjustable temperature controller and a temperature limiter are installed near the preheating heating pipe.

Among them, a constant temperature thermostat is installed near the instant heating tube.

The working principle of the electric water heater is: when only a small amount of hot water is needed, it is set to the instant heating mode, and the heating tube with the casing works, and under the pumping action of the casing, the hot water in the casing quickly It rises to the outlet pipe to quickly provide the required hot water. At the same time, the water cycle occurs in the tank, reducing the cold water area, and will not let the heating tube dry, and the heating is uniform and the heating efficiency is improved; when more hot water is required to be preheated , is set to preheating mode, the heating tube without casing works, water circulation occurs in the tank, the whole tank is heated evenly, and the heating efficiency is improved; when a large amount of hot water is needed in a short time, it is set to combine instant heating and preheating In this way, the two heating pipes work at the same time, so that the hot water can be provided quickly by the heating pipe with the sleeve, and the total amount of hot water can be guaranteed by the two heating pipes.

The advantages of the electric water heater are: (1) the water mixing effect is good, the two inner tanks are connected in parallel on the left and right, and the two are connected by two connecting pipes up and down. The connecting pipe is very short, and the water between the left and right two tanks will easily (2) The structure is simple, the left and right tanks are connected in parallel through the connecting pipe, the cold water inlet pipe in the right tank is the main water inlet pipe, and the outlet pipe of the left tank is the main water outlet pipe (3) The use of the sleeve can realize the improvement of water temperature in a shorter time, and the efficiency of rapid heating is greatly improved, thereby greatly reducing the power requirement of the instant heating tube, and the instant heating tube can reach 2.5 kilowatts. Achieve very good heating effect; (4) The three working modes are suitable for various occasions. It can not only preheat a large amount of stored hot water in advance, but also quickly supply hot water when a small amount of hot water is used. It is necessary to select the power to switch the heating mode, and to generate the required hot water in the electric water heater with a small volume, so that the electric energy can be reasonably used and the energy can be saved; cost, and enhanced the stability of use. Moreover, since the heating tube is placed at the bottom of the inner container, dry burning during use can be effectively prevented, the working environment of the heating tube is greatly improved, and the service life of the heating tube is increased.

Description of drawings

Fig. 1 is a structural schematic diagram of a water heater mentioned in the prior art.

Fig. 2 is a reference diagram of the third working state of the embodiment of the present invention.

Fig. 3 is a reference diagram of working state 2 of the embodiment of the present invention.

Fig. 4 is a reference diagram of working state 1 of the embodiment of the present invention.

Detailed ways

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

Referring to FIG. 2 , the electric water heater of the present invention includes a preheating heater 5 and an instant heater 7 . The preheating heating tank 5 is connected with the water inlet 1 of the water heater, and the water inlet 1 generally enters water from the bottom of the inner tank. There are two temperature-measuring tubes, and an adjustable temperature controller 13 and a temperature limiter 14 are respectively housed inside. The instant heating tube 9 is installed on the bottom flange of the instant heating tube 7, and the constant temperature thermostat 12 is housed in the temperature measuring tube near the instant heating tube 9, and the instant heating tube 7 is connected with the water outlet 11 of the water heater, and the water outlet One end of 11 extends to the top of the instant heating tank, and the water outlet generally discharges water from the inner tank top. The upper part of the preheating heating vessel 5 and the instant heating vessel 7 are connected through the communication pipe 6 , and the lower parts are connected through the communication pipe 2 .

As a preferred embodiment of the present invention, a sleeve 8 is installed on the outside of the instant heating pipe 9 of the electric water heater. The sleeve is open on the top and has gaps around the bottom, and the place without gaps is fixedly connected with the flange of the instant heating pipe 9 by spot welding or other welding methods.

In the electric water heater of the present utility model, the powers of the two heating tubes of the preheating heating tube 3 and the heating tube 9 may be different. Generally speaking, the preheating heating tube 3 mostly adopts a low-power heating tube, while the instant heating tube 9 is more With high-power heating tubes, the sum of the power of the two heating tubes should not be greater than the maximum power that can be carried by the wires that supply power to the home. On the shell of water heater, control panel is fixed, and double switch 4,10 is housed on the control panel, and what adorn below the switch is the knob of adjustable thermostat, utilizes these two to control the work of two heating tubes. The water heater can realize three working modes.

When the water heater was in the first mode of operation, by connecting a switch in the double switch on the control panel, the preheating heating tube 3 in the preheating heater 5 was operated, that is, the heating tube 9 was not working (see Figure 4). When using water, cold water enters the preheating heating tank 5 from the water inlet pipe 1. After being heated, the cold water rises and rises to the tops of the left and right tanks through the upper connecting pipe 6. Unicom pipe 2 enters the bottom of preheating heating tank 5, and allows preheating heating tube 3 to heat them rapidly, becomes hot water and rises again after heating, forms a cycle like this between two tanks, allows the water in two tanks to be heated evenly. Finally, the heated water flows out from the water outlet 11 . Simultaneously, the heating method of preheating heating pipe 3 to water temperature is: when water temperature reaches adjustable temperature controller 13 setting temperature, adjustable temperature controller 13 just moves, cuts off power supply and stops heating; When water temperature is lower than adjustable temperature controller During the minimum starting temperature (for example 10 ℃) of device 13 settings, adjustable thermostat 13 action, switch on power supply, preheating heating pipe 3 just starts heating again, guarantees that the water temperature in the water heater fluctuates within a certain range. When using hot water, it can be mixed with more cold water. In this mode, a large amount of hot water can be stored in the water heater, which can be used in winter or places that need a large amount of hot water. However, when the hot water inside is used up and used for the second time, it needs to wait for a period of time before it can be used again. In this mode, because only the preheating heating tube 3 works, the power of the water heater is the power of the preheating heating tube 3 .

When the water heater is in the second working mode, the switch on the control panel makes the preheating heating tube 3 not work, and only the instant heating heating tube 9 works (see Figure 3), because there is a sleeve outside the instant heating heating tube 9 8. Since the sleeve 8 isolates a small-scale heating area, the water in the sleeve 8 is heated quickly, and the heated hot water rises rapidly along the sleeve 8 to the top of the instant heating liner 7 close to the hot water. Water outlet pipe 11 water outlet position, when using water now, hot water can flow out from hot water outlet pipe immediately, reaches the effect of rapid heating. Suitable for quick use of hot water, such as washing hands and vegetables. You can turn off the control switch immediately when not in use, so as to achieve the purpose of reducing power consumption. Even if the water is not used immediately, the hot water rises along the sleeve 8 and gathers at the top of the instant heating tank 7, and can enter the top of the preheating heating tank 5 through the upper connecting pipe 6, and the cold water in the preheating heating tank 5 is passed through The lower connecting pipe 2 is pressed into the bottom of the instant heating tube 7, and the cold water at the bottom of the instant heating tube 7 enters the sleeve 8 from the gap below the sleeve 8 under the action of the negative pressure in the sleeve 8, and is heated by the instant heating tube. 9 heats up rapidly to form a heating cycle centered on the sleeve 8, thereby eliminating the cold water zone caused by the cold end of the heating pipe in the left tank. Simultaneously, the heating method of the instant heating pipe 9 to the water temperature is: when the inner tank water temperature rises to the set temperature of the constant temperature thermostat 12, the constant temperature thermostat 12 just cuts off the power supply of the instant heating pipe 9 again, and the instant heating Tube 9 stopped working. When the water temperature was lower than the minimum start-up temperature (for example 10°C) set by the constant temperature thermostat 12, the constant temperature thermostat 12 would automatically connect the power supply of the instant heating tube 9 again, that is, the thermal heating tube 9 would start working again, Heating can also allow the whole water heater to reach temperature balance. At this time, when using water, cold water enters from the water inlet pipe 1 to replenish, and hot water flows out from the water outlet pipe 11. It can also achieve the effect of a large amount of hot water supply. This mode is suitable for the situation where the water temperature is relatively high in summer, and the required hot water can be produced quickly with less power consumption. In this mode of operation, since only the instant heating tube 9 works. At this moment, the power of the water heater is exactly the power of the instant heating heating pipe 9 .

These two modes, because there is only one heating tube to work, the actual working power of the water heater is the power of a single heating tube, which is relatively low.

When the water heater is in the third working mode, by turning on the double switch on the control panel, the heating tubes of the two tanks can work at the same time (see Figure 2). The water temperature in the water heater will quickly reach the temperature set by the thermostat, and the temperature of the water in the inner tank can be balanced through the automatic adjustment of the thermostat. Now water just can emit a large amount of required hot water. If the thermostat fails, when the water temperature rises to the temperature set by the temperature limiter 14, the temperature limiter 14 will act to cut off all power supplies, thus protecting the water heater and people's safety. The power of the water heater in this mode is actually the sum of the power of the two heating tubes.

The above three working modes are suitable for the needs of various occasions. It can not only preheat a large amount of stored hot water in advance, but also quickly supply hot water when a small amount of hot water is used. Water insulation, to achieve the purpose of easy to use, effective drug and energy saving. At the same time, no solenoid valve is used, no computer control is required, which not only reduces the cost, but also enhances the stability of use. Moreover, since the heating tube is placed at the bottom of the inner container, dry burning during use can be effectively prevented, the working environment of the heating tube is greatly improved, and the service life of the heating tube is increased. Users can choose different modes according to different needs and environmental conditions to achieve the purpose of rational use of energy.

What is disclosed above is only a specific embodiment of the present invention, but the present invention is not limited thereto. Without departing from the spirit and essence of the present utility model, those skilled in the art can make various corresponding changes and deformations according to the present utility model, but these corresponding changes and deformations should all belong to the appended documents of the present utility model. The scope of the claims.

Claims (5)

1. A preheating type dual-core electric water heater, comprising: a preheating heating tube (5) connected to the water inlet (1) and a preheating heating tube (3) inside the preheating heating tube (5), and a The instant heating liner (7) connected to the water outlet (11) and the instant heating tube (9) inside the instant heating liner (7), it is characterized in that the preheating heating liner (5) and the instant heating The bile (7) is connected by two connecting pipes (6, 2) up and down. 2. The electric water heater according to claim 1, characterized in that it further comprises a sleeve (8) sleeved outside the instant heating pipe (3). 3. The electric water heater according to claim 2, characterized in that the upper end of the sleeve (8) is open, and gaps are left around the lower end. 4. The electric water heater according to claim 3, characterized in that an adjustable temperature controller (13) and a temperature limiter (14) are installed near the preheating heating pipe (3). 5. The electric water heater according to claim 4, characterized in that a constant temperature thermostat (12) is installed near the instant heating pipe (9).

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