CN106123309B

CN106123309B - Inlet water preheating type electric water heater

Info

Publication number: CN106123309B
Application number: CN201610713707.6A
Authority: CN
Inventors: 范胜男
Original assignee: Huzhou Pinchuang Incubator Co ltd
Current assignee: Huzhou Pinchuang Incubator Co ltd
Priority date: 2016-08-24
Filing date: 2016-08-24
Publication date: 2022-06-10
Anticipated expiration: 2036-08-24
Also published as: CN106123309A

Abstract

The invention relates to a water inlet preheating type electric water heater of an electric water heater, which comprises a shell, a heat preservation cylinder, a heating pipe, a control circuit, a water inlet pipe and a water outlet pipe, wherein the heat preservation cylinder is positioned in the shell, and the water inlet pipe and the water outlet pipe are respectively connected into the heat preservation cylinder from the outside of the shell; an inner cylinder which divides the interior of the heat-insulating cylinder into an inner cavity and an outer cavity is fixedly arranged in the heat-insulating cylinder, the inner cylinder transmits the heat of the inner cavity and the outer cavity, and the heating part of the heating pipe is positioned in the inner cavity; the outer cavity is divided into a left cavity and a right cavity, the tops of the left cavity and the right cavity are communicated, the bottom of the left cavity is communicated with the bottom of the inner cavity, and the bottom of the right cavity is communicated with the water inlet pipe; the two branches of the water outlet pipe are respectively communicated with the left cavity and the inner cavity, the pipe orifice height of the branch pipe of the water outlet pipe positioned in the left cavity is higher than or equal to the pipe orifice height of the branch pipe of the water outlet pipe positioned in the inner cavity, the water outlet pipe is provided with an electromagnetic valve for controlling the branch pipe to be switched on, and the electromagnetic valve is connected with the control circuit. The invention can realize inlet water preheating, stably adjust water temperature and save energy consumption.

Description

Inlet water preheating type electric water heater

Technical Field

The invention relates to the field of water heaters, in particular to a water inlet preheating type electric water heater.

Background

The electric water heater is a water heater which takes electricity as energy source for heating, and is one of three water heaters which are parallel to a gas water heater and a solar water heater. The electric water heater can be divided into a water storage type, an instant heating type and a quick heating type according to the heating power, wherein the main household form is the water storage type. The existing water storage type electric water heater structure is generally composed of a shell, a heat preservation liner, a heating pipe, a water inlet pipe, a water outlet pipe, a control circuit and the like, the water storage in the heat preservation liner is heated to the required temperature by the heating pipe to supply water, the electric water heater usually simultaneously feeds water and supplies water when working, the heating pipe is required to discontinuously heat the water storage in the heat preservation liner, and the water storage can be kept at the preset temperature. However, when the water heater is used in winter, the temperature of inlet water is low, the temperature difference between the inlet water and the stored water is large, when the inlet water is directly mixed with the stored water, the temperature change of the stored water is easy to be unstable, and the accuracy of the temperature sensor is seriously influenced, so that the heater excessively or continuously heats, and the energy consumption is increased. Therefore, the structure of the existing electric water heater needs to be improved.

Disclosure of Invention

In order to overcome the defects, the invention designs the water inlet preheating type electric water heater, which solves the technical problems that the temperature change of the stored water is unstable and the energy consumption of heating work is increased because the water inlet and the stored water are directly mixed in the heating cavity in the conventional electric water heater. The technical scheme is adopted for realizing the method.

The water inlet preheating type electric water heater comprises a shell, a heat preservation cylinder, a heating pipe, a control circuit, a water inlet pipe and a water outlet pipe, wherein the heat preservation cylinder is positioned in the shell, the water inlet pipe and the water outlet pipe are respectively connected into the heat preservation cylinder from the outside of the shell, the heating pipe is installed at one end in the heat preservation cylinder, and the heating pipe is connected with the control circuit; an inner cylinder which divides the interior of the heat-insulating cylinder into an inner cavity and an outer cavity is fixedly arranged in the heat-insulating cylinder, the inner cylinder transmits the heat of the inner cavity and the outer cavity, and the heating part of the heating pipe is positioned in the inner cavity; the outer cavity is divided into a left cavity and a right cavity by a partition plate, the tops of the left cavity and the right cavity are communicated through a limber hole at the top of the partition plate, the bottom of the left cavity is communicated with the inner cavity through a water inlet hole arranged at the bottom of the inner cavity, and the bottom of the right cavity is communicated with the water inlet pipe; the outlet pipe branch is two the tunnel, all the way with left side chamber communicates with each other, another way with the inner chamber communicates with each other, and the outlet pipe is located the lateral pipe mouth of pipe height that left intracavity is higher than or equal to the outlet pipe and is located the lateral pipe mouth of pipe height of inner chamber, the outlet pipe installation is equipped with the solenoid valve that the switch-on was switched in the control branch pipeline, and the solenoid valve is connected control circuit.

Through the structure, the inner cylinder is utilized to separate the inner part of the heat preservation cylinder into the outer cavity for preheating inlet water and the inner cavity for heating, and the inner cylinder is utilized to conduct the heat of the inner cavity to the outer cavity, so that the preheating of the inlet water of the outer cavity is realized, meanwhile, because the water storage of the inner cavity is not in direct contact with the inlet water of the outer cavity, the uniform heat exchange is realized through the inner cylinder, the water temperature change of the inner cavity is linear, the work of the temperature sensor and the heating pipe is stable and reliable, the unnecessary energy consumption is reduced, and the purpose of energy conservation is achieved. Besides, when the water outlet pipe is communicated with the outer cavity to supply water, the outer cavity can directly supply water after being heated by water entering the outer cavity by utilizing the heat exchange between the outer cavity and the inner cavity, the water stored in the inner cavity is gradually cooled, and the water outlet pipe is communicated with the inner cavity to supply water after being cooled to the required temperature, so that the heat utilization rate of the water stored in the inner cavity is higher.

And under the power-off state of the electromagnetic valve, the water outlet pipe is communicated with the inner cavity. The electric water heater can supply water normally after power failure.

And heat conducting fins are uniformly distributed on the outer wall of the inner barrel. The heat-conducting fins are additionally arranged to further improve the heat exchange efficiency.

And the left cavities of the inner cavity and the outer cavity are both provided with temperature sensors, and the temperature sensors are connected with the control circuit. Through the double temperature control of the inner cavity and the outer cavity, the temperature control of the electric water heater and the work of the heating pipe are more reliable, and the energy conservation is facilitated.

The inner cylinder is provided with a drain outlet aligned with the drain outlet of the heat-insulating cylinder, and the two drain outlets are connected with the same drain valve. Through setting up the drain, make things convenient for the washing maintenance operation.

And a magnesium rod connected with the blowoff valve into a whole is arranged in the inner barrel. Through setting up the magnesium stick, be favorable to protecting the heating pipe, prevent that the heating pipe incrustation scale from gathering and influencing heating efficiency.

The invention has the function of inlet water preheating, so that the water temperature change in the water storage cavity of the electric water heater is more uniform and linear, the temperature sensor and the heating pipe work more reliably and stably, and the energy consumption is effectively reduced. Meanwhile, the inlet water preheated by the outer cavity can be directly used, so that the utilization rate of the stored water heat is improved.

Drawings

Fig. 1 is a schematic diagram of the structure of the outer cavity water supply of the present invention, and arrows in the diagram indicate the flow direction.

Fig. 2 is a schematic diagram of the water supply structure of the inner cavity of the invention, and arrows in the diagram indicate the flow direction.

The sequence numbers and names in the figure are: 1. the shell, 2, a section of thick bamboo keeps warm, 201, exocoel, 2011, left chamber, 2012, right chamber, 3, inner tube, 301, inner chamber, 302, conducting strip, 303, inlet opening, 4, heating pipe, 5, inlet tube, 6 baffles, 601, limbers, 7, outlet pipe, 8, blowoff valve, 9, magnesium stick.

Detailed Description

The invention will now be described with reference to the accompanying drawings.

As shown in fig. 1 and 2, the intake preheating electric water heater includes a housing, a heat-insulating cylinder 2, an inner cylinder 3, a heating pipe 4, a control circuit, an intake pipe 5, and an outlet pipe 7, wherein the heat-insulating cylinder 2 is located in the housing 1, the inner cylinder 3 is located in the heat-insulating cylinder 2 through a locating support, the inner cylinder 3 partitions the interior of the heat-insulating cylinder 2 into an inner cavity 301 and an outer cavity 201 which are hermetically separated, and the inner cylinder 3 is made of a heat-conducting material and is used for conducting heat of the inner cavity 301 and the outer cavity 201. In order to improve the uniformity of heat conduction of the inner cylinder 3, heat-conducting fins 302 are uniformly distributed on the outer wall of the inner cylinder 3. The heating part of the heating pipe 4 is positioned in the inner cavity 301, the heating pipe 4 is connected with a control circuit, and the control circuit is arranged in an electric cabinet of the shell. The outer cavity 201 is separated by the partition plate 6 to form a left cavity 2011 and a right cavity 2012, the tops of the left cavity 2011 and the right cavity 2012 are communicated through the limber hole 601 at the top of the partition plate 6, the bottom of the left cavity 2011 is communicated with the inner cavity 301 through the water inlet hole 303 arranged at the bottom of the inner cavity 301, and the bottom of the right cavity 2012 is communicated with the water inlet pipe 5. The water outlet pipe 7 is branched into two paths, one path is communicated with the left cavity 2011, the other path is communicated with the inner cavity 301, the height of the pipe orifice of the branch pipe, positioned in the left cavity 2011, of the water outlet pipe 7 is higher than or equal to the height of the pipe orifice of the branch pipe, positioned in the inner cavity 301, of the water outlet pipe 7, and the pipe orifice of the branch pipe, positioned in the inner cavity 301, of the water outlet pipe 7 is close to the top of the inner cavity 301 so as to prevent dry burning. The water outlet pipe 7 is provided with an electromagnetic valve for controlling the water outlet pipe 7 to switch between the conduction inner cavity 301 and the conduction left cavity 2011, the electromagnetic valve and the heating pipe 4 are controlled by the same control circuit, and the water outlet pipe 7 conducts the inner cavity 301 under the power-off state of the electromagnetic valve.

Furthermore, the following structure can be designed to improve the use effect: 1. the left cavities 2011 of the inner cavity 301 and the outer cavity 201 are both provided with temperature sensors, and the temperature sensors are connected with the control circuit. And double temperature control is adopted, so that the temperature control of the electric water heater and the work of the heating pipe 4 are more reliable, the energy conservation is facilitated, and the power consumption is reduced. 2. The inner cylinder 3 is provided with a drain aligned with the drain of the heat-insulating cylinder 2, and the two drains are connected with the same drain valve 8, so that the electric water heater is convenient to clean and maintain. 3. The inner cylinder 3 is internally provided with a magnesium rod 9 which is connected with the blowoff valve 8 into a whole, so that the service life of the heating pipe 4 is prolonged, and the heating reliability is improved.

The working method of the invention is as follows: when the electric water heater is initially heated and is heated to a preset temperature, the water is stored in the inner cavity 301 to supply water, namely the electromagnetic valve of the water outlet pipe 7 controls the conduction of the water outlet pipe 7 and the inner cavity 301. When the preset temperature of the electric water heater is too high and needs to be lowered, the electric water heater is switched to the outer cavity 201 for storing water to supply water, namely the electromagnetic valve of the water outlet pipe 7 controls the conduction of the water outlet pipe 7 and the outer cavity 201, when the temperature sensor senses that the temperature of the inner cavity 301 is close to the preset temperature or the temperature of the outer cavity 201 is lower than the preset temperature, the electromagnetic valve of the water outlet pipe 7 is switched to control the conduction of the water outlet pipe 7 and the inner cavity 301 again, and the water is stored in the inner cavity 301 for continuously supplying water, so that the functions of quickly lowering the water temperature of the electric water heater and stably supplying water are realized.

Claims

1. A water inlet preheating type electric water heater comprises a shell, a heat preservation cylinder (2), a heating pipe (4), a control circuit, a water inlet pipe (5) and a water outlet pipe (7), wherein the heat preservation cylinder (2) is positioned in a shell (1), the water inlet pipe (5) and the water outlet pipe (7) are respectively connected into the heat preservation cylinder (2) from the outside of the shell, the heating pipe (4) is installed at one end in the heat preservation cylinder (2), and the heating pipe (4) is connected with the control circuit; the heat insulation device is characterized in that an inner cylinder (3) which divides the interior of the heat insulation cylinder (2) into an inner cavity (301) and an outer cavity (201) is fixedly arranged in the heat insulation cylinder (2), the inner cylinder (3) conducts heat of the inner cavity (301) and the outer cavity (201), and a heating part of the heating pipe (4) is positioned in the inner cavity (301); the outer cavity (201) is separated by a partition plate (6) to form a left cavity (2011) and a right cavity (2012), the tops of the left cavity (2011) and the right cavity (2012) are communicated through a water through hole (601) in the top of the partition plate (6), the bottom of the left cavity (2011) is communicated with the inner cavity (301) through a water inlet hole (303) formed in the bottom of the inner cavity (301), and the bottom of the right cavity (2012) is communicated with the water inlet pipe (5); the outlet pipe (7) is branched into two paths, one path is communicated with the left cavity (2011), the other path is communicated with the inner cavity (301), the branched pipe orifice of the outlet pipe (7) in the left cavity (2011) is higher than or equal to the branched pipe orifice of the outlet pipe (7) in the inner cavity (301), the outlet pipe (7) is provided with a solenoid valve for controlling the branched pipe to be switched and conducted, the solenoid valve is connected with the control circuit, the outlet pipe (7) is conducted with the inner cavity (301), the outer wall of the inner cylinder (3) is uniformly provided with heat conducting fins (302), the left cavity (2011) of the inner cavity (301) and the outer cavity (201) is provided with a temperature sensor, the temperature sensor is connected with the control circuit, the inner cylinder (3) is provided with a drain aligned with the drain of the heat-preserving cylinder (2), and the two drains are connected with the same drain valve (8), a magnesium rod (9) which is connected with the blowoff valve (8) into a whole is arranged in the inner cylinder (3).