CN1322283C - Heating device and method of electric water heater - Google Patents

Abstract

The present invention relates to a heating device and a heating method of an electric water heater, the heating device is a domestic electric water heater which has the advantages of high water supplying speed, stable water temperature ensuring and energy saving. The upper part of the heating device is used as a superfluous heat heating zone (5), the lower part is provided with a prior heating zone (6), a water inlet pipe (7) is connected to the upper part of a water tank (1), and a water outlet pipe (8) is connected with the bottom of the prior heating zone; the lower part, namely an evaporation section of a variable heat conducting pipe is positioned in the prior heating zone, the upper part, namely a condensing section is positioned in the superfluous heat heating zone, and an electric heater (2) is positioned at the lower part, namely the evaporation section of the variable heat pipe; a natural convection inhibiting plate (4) is positioned in the water tank; firstly, the prior heating zone is heated up, after the water temperature in the prior heating zone reaches certain temperature, heat can be automatically diverted to heat water in the superfluous heat heating zone by the variable heat conducting pipe; on the contrary, when the water temperature of the prior heating zone falls, the heat used for heating the water in the superfluous heat heating zone can be automatically reduced by the variable heat conducting pipe.

Description

Heating device and heating method of electric water heater

technical field

The invention relates to an electric heating method and device, in particular to a household electric water heater heating method and device.

Background technique

As a method of obtaining domestic hot water, electric water heaters are widely used in residential households. Compared with other types of water heaters, electric water heaters have the advantages of being clean, convenient, and not affected by the weather.

The current heating method of electric water heaters mainly uses electric heating elements to directly heat water. Electric water heaters can be divided into preheating type and instant heating type, among which preheating type accounts for the vast majority.

Preheating electric water heaters have significant disadvantages in the following aspects:

1. Before using hot water, it is necessary to heat the water for a long time in advance, which brings great inconvenience to the use, especially when hot water is urgently needed.

2. When the hot water in the water heater is used up, it must wait for preheating again, and cannot continuously provide hot water for multiple people to take a bath.

3. The remaining hot water in the water heater needs to be heated and kept warm intermittently, which increases energy consumption.

4. It has a large water tank, occupying indoor space and affecting the appearance.

Although the instant electric water heater can solve the problem of no need for heating in advance, it has the disadvantage of inconvenient temperature adjustment, the water temperature fluctuates greatly with the change of water consumption, and the quality of the water temperature is low, so that it is difficult for this instant electric water heater to be widely used .

The reason why the current preheating electric water heater needs a longer preheating time is because more water in the water tank needs to be heated at the same time. If the water heater can be divided into a priority heating area and an excess heat heating area, the first thing to A small amount of water in the priority heating zone is heated, and hot water can be provided in a short time. After the water in the priority heating zone reaches a certain temperature, the heat is automatically transferred to the water in the excess heat heating zone for heating; vice versa , when the water consumption increases and the water temperature in the priority heating zone drops, the heating of the water in the excess heat heating zone is automatically reduced, so that hot water can be provided quickly and the water temperature can be kept stable. In addition, this heating method can continuously provide hot water, which can greatly reduce the volume of the current preheating electric water heater water tank. It can also save indoor space and increase its aesthetics.

Contents of the invention

Technical problem: The purpose of this invention is to provide a heating device and heating method for an electric water heater with short preheating time, stable water temperature, continuous supply of hot water, small water tank, low energy consumption and space saving.

Technical solution: The heating device of the electric water heater of the present invention includes a water tank, an electric heater, a variable heat pipe, a natural convection suppression plate, an excess heat heating area, a priority heating area, a cold water inlet, and a hot water outlet; wherein, the upper part of the water tank is a In the excess heat heating area with a large volume, a priority heating area with a small volume is set at the lower part of the water tank, the cold water inlet is connected to the upper part of the water tank, and the hot water outlet is connected to the bottom of the priority heating area; the lower part of the variable heat pipe, that is, the evaporation section, is located in the priority heating area , the upper part of the variable heat pipe, that is, the condensation section, is located in the excess heat heating area, and the electric heater is located in the lower part of the variable heat pipe, that is, the evaporation section in the priority heating area; the natural convection suppression plate is located in the water tank. The electric heater is located at the lower part of the variable heat conduction pipe in the priority heating zone, that is, the bottom, or the periphery, or the inside of the evaporation section. There are one or more variable heat pipes. The natural convection suppression plate is a porous partition, and there are multiple pieces in the water tank, which are respectively located on different levels in the water tank.

The heating method of the electric water heater heating device of the present invention is as follows: the heating part of the water heater is divided into a priority heating area and an excess heat heating area, firstly heat the priority heating area, and when the water temperature in the priority heating area reaches a certain temperature, the variable heat pipe The heat can be automatically transferred to heat the water in the excess heat heating zone; conversely, when the water temperature in the priority heating zone drops, the variable heat conduction tube can automatically reduce the heating of the water in the excess heat heating zone, To ensure the stability of the water temperature in the priority heating zone.

Its working process is:

The water heater is divided into a priority heating zone and an excess heat heating zone. The electric water heater is equipped with a variable heat conduction tube. The evaporation section of the variable heat conduction tube is located in the priority heating zone, and the condensation section is located in the excess heat heating zone. The electric heater is installed on the lower part of one or more variable heat pipes, that is, the evaporation section of the heat pipe, and is located in the priority heating zone of the water heater. Heating is performed and hot water is provided in a short time. While the electric heater heats the water around it, it also heats the variable heat pipe. As the temperature of the water around the heater and the bottom of the variable heat pipe increases, the working fluid inside the variable heat pipe begins to change phase. Vaporization, the heat pipe starts to work, the pressure in the pipe increases with the increase of temperature, the non-condensable gas in the variable heat conduction pipe is compressed and shrinks to the top of the pipe, so that the condensation heat transfer area of the working medium vapor in the heat pipe increases, through the heat pipe The condensation section heats the water in the excess heat heating zone. The higher the temperature in the heat pipe, the greater the pressure, the more compressed the non-condensable gas in the pipe is, the larger the condensation area of the heat pipe is, the heat release is strengthened, and the more heat is transferred to the excess heat heating area, thus avoiding the priority heating area The water temperature inside is too high. Conversely, when the amount of hot water increases and the water temperature in the priority heating zone drops, the pressure inside the variable heat pipe decreases with the temperature drop of the heat pipe, and the noncondensable gas expands to occupy a larger heat release area of the condensation section, automatically Minimize the discharge of heat to the excess heat heating area, so that the water temperature in the priority heating area increases. It can be seen that the above-mentioned heating method has a good automatic constant temperature effect. The condensing section of the variable heat pipe heats the water in the water tank from bottom to top. In order to reduce the natural convection heat transfer between water of different heights and temperatures in the water tank, a natural convection suppression plate is installed in the water tank (both With porous partitions) to weaken the natural convection effect of water.

Beneficial effects: This electric water heater heating method has many unique advantages and is highly practical, and is widely applicable to providing domestic hot water for families:

1. There is no need for a long warm-up time. The main reason is that it is not necessary to heat the whole water in the water tank at the same time, but first, only a small amount of water in the priority heating zone is heated and provided for use.

2. The temperature of the hot water is stable. When the water temperature in the priority heating zone reaches a certain temperature, the variable heat conduction tube can automatically transfer the heat added by the electric heating element, which is used to heat the water in the excess heat heating zone from bottom to top. Sectional heating; and when the temperature of the priority heating area drops, it can automatically reduce the heating of the excess heat heating area in time;

3. Can provide hot water continuously;

4. It can greatly reduce the volume of the current preheating electric water heater water tank. On the one hand, it reduces the heating energy consumption required for a large amount of water in the water tank to keep warm, which has an energy-saving effect. At the same time, the smaller volume of the water heater can also save indoor space and increase its aesthetics.

Description of drawings

Fig. 1 is a structural schematic view of the heating device of the electric water heater of the present invention. Among them: water tank 1, electric heater 2, variable heat pipe 3, natural convection suppression plate 4, excess heat heating area 5, priority heating area 6, cold water inlet 7, hot water outlet 8.

Detailed ways

The present invention relates to a heating device and a heating method for an electric water heater. The device includes a water tank 1, an electric heater 2, a variable heat pipe 3, a natural convection suppression plate 4, an excess heat heating area 5, a priority heating area 6, a cold water Inlet 7, hot water outlet 8; among them, the upper part of the water tank 1 is a large excess heat heating area 5, the lower part of the water tank 1 is provided with a smaller volume priority heating area 6, the cold water inlet 7 is connected to the upper part of the water tank 1, and the hot water outlet 8 is connected to the bottom of the priority heating area 6; the lower part of the variable heat pipe 3, namely the evaporation section, is located in the priority heating area 6, the upper part of the variable heat pipe 3, namely the condensation section, is located in the excess heat heating area 5, and the electric heater 2 is located in the priority heating area. The lower part of the variable heat pipe 3 in the zone 6 is the evaporation section; the natural convection suppression plate 4 is located in the water tank 1 . The electric heater 2 is located in the lower part of the variable heat conduction pipe 3 in the priority heating zone 6 , that is, the bottom, or the periphery, or the inside of the evaporation section. There are one or more variable heat pipes 3 . In order to reduce the natural convection heat transfer between water of different heights and different temperatures in the water tank, a natural convection suppression plate (both with a porous partition) is installed in the water tank to weaken the natural convection effect of the water, and the natural convection suppression plate They are respectively located on levels of different heights in the water tank 1.

The heating method is as follows: the water heater is divided into a priority heating area and an excess heat heating area. The electric water heater is equipped with a variable heat conduction tube, the evaporation section of the variable heat conduction tube is located in the priority heating area, and the condensation section is located in the excess heat heating area. The electric heater is installed on the lower part of one or more variable heat pipes (the evaporation section of the heat pipe) and is located in the priority heating zone of the water heater. Heating is performed and hot water is provided in a short time. While the electric heater heats the water around it, it also heats the variable heat pipe. As the temperature of the water around the heater and the bottom of the variable heat pipe increases, the working fluid inside the variable heat pipe begins to change phase. Vaporization, the heat pipe starts to work, the pressure in the pipe increases with the increase of temperature, the non-condensable gas in the variable heat conduction pipe is compressed and shrinks to the top of the pipe, so that the condensation heat transfer area of the working medium vapor in the heat pipe increases, through the heat pipe The condensation section heats the water in the excess heat heating zone. The higher the temperature in the heat pipe, the greater the pressure, the more compressed the non-condensable gas in the pipe is, the larger the condensation area of the heat pipe is, the heat release is strengthened, and the more heat is transferred to the excess heat heating area, thus avoiding the priority heating area The water temperature is too high. Conversely, when the amount of hot water increases and the water temperature in the priority heating zone drops, the pressure inside the variable heat pipe decreases with the temperature drop of the heat pipe, and the noncondensable gas expands to occupy a larger heat release area of the condensation section, automatically Reduce the discharge of heat to the excess heat heating area, so that the water temperature in the priority heating area increases. It can be seen that the above-mentioned heating method has a good automatic constant temperature effect. The condensing section of the variable heat pipe heats the water in the water tank from bottom to top. In order to reduce the natural convection heat transfer between water of different heights and temperatures in the water tank, a natural convection suppression plate is installed in the water tank (both With porous partitions) to weaken the natural convection effect of water.

Claims (5)

1, a kind of heater of electric heater is characterized in that this device comprises that water tank (1), electric heater (2), variable heat conduction pipe (3), free convection suppress plate (4), the superfluous heat thermal treatment zone (5), the preferential thermal treatment zone (6), cooling water inlet (7), hot water outlet (8); Wherein, water tank (1) top is the bigger superfluous heat thermal treatment zone (5) of a volume, and water tank (1) bottom is provided with the less preferential thermal treatment zone (6) of a volume, cooling water inlet (7) water receiving case (1) top, and hot water outlet (8) connects bottom, the preferential thermal treatment zone (6); The bottom of variable heat conduction pipe (3) is that evaporator section is positioned at the preferential thermal treatment zone (6), the top of variable heat conduction pipe (3) is that condensation segment is positioned at the superfluous heat thermal treatment zone (5), and the bottom that electric heater (2) is positioned at the preferential thermal treatment zone (6) variable heat conduction pipe (3) is an evaporator section; Free convection suppresses plate (4) and is positioned at water tank (1).

2, the heater of electric heater according to claim 1 is characterized in that the bottom that electric heater (2) is positioned at the preferential thermal treatment zone (6) variable heat conduction pipe (3) is bottom or the periphery or the inside of evaporator section.

3, the heater of electric heater according to claim 1 and 2 is characterized in that variable heat conduction pipe (3) is one or more.

4, the heater of electric heater according to claim 1, it is characterized in that free convection suppresses plate (4) for having the dividing plate of porous, free convection inhibition plate (4) is positioned at water tank (1) polylith, lays respectively on the aspect of the differing heights in the water tank (1).

5, a kind of heating means of heater of electric heater as claimed in claim 1, the heating part that it is characterized in that water heater is divided into the preferential thermal treatment zone (6) and the superfluous heat thermal treatment zone (5), at first the preferential thermal treatment zone (6) are heated, after the water of the preferential thermal treatment zone (6) heating reaches uniform temperature, variable heat conduction pipe (3) can be automatically with transfer of heat to the water in the superfluous heat thermal treatment zone (5) is heated; Otherwise when the water temperature of the preferential thermal treatment zone (6) descended, variable heat conduction pipe (3) can automatically reduce the water in the superfluous heat thermal treatment zone (5) is heated, to guarantee the stable of the middle water temperature in the preferential thermal treatment zone (6).