TW201732207A - Built-in heating module of electric water heater capable of quickly and uniformly increasing a water storage temperature in the storage tank with double heating effect of the heating module - Google Patents

Abstract

Disclosed is a built-in heating module of an electric water heater. The heating module comprises a heater and a heat conduction hood attached to an outside of the heater. The heater comprises a heating pipe and a heat generating film covering an outer surface of the heating pipe. A heat transfer space that produces effects of heat radiation and thermal convection exists between the heat conduction hood and the heater. The heating module is installed inside a water storage barrel of the electric water heater. As the water storage barrel is fed with water, the heating pipe of the heating module heats the circulating water flow to and from the heating pipe by natural heat convection and the heat conduction hood heats the water in the water storage barrel by heat conduction. With the double heating effect of the heating module, the water storage temperature in the storage tank can be quickly and uniformly increased.

Description

Built-in heating module for electric water heater

The invention relates to an electric water heater, and more particularly, to a built-in heating module built in a water storage tank of an electric water heater for directly heating the water in the water storage tank.

As shown in the first figure, the conventional water storage type electric water heater 10 includes a water storage cylinder 11 and an electric heater 12 disposed outside the water storage cylinder 11, and the reason why the electric heater 12 is disposed outside the water storage cylinder 11 is to avoid the electric heater. Electrical devices are in danger of contact with water. During the water inlet of the water storage tank 11, the pump 13 is pressurized, and the water is heated from the low water inlet 14 of the electric heater 12 into the heat pipe 15 and then injected into the water storage tank 11 from the high water outlet 16.

The above conventional water storage type electric water heater has the following disadvantages: the heating cycle of water in the water storage tank depends on the operation of the pump and consumes electric energy.

During the water inlet of the water storage tank, a large amount of external cold water enters the water storage tank, and the water temperature in the water storage cylinder rapidly drops sharply.

When the water temperature in the water storage tank drops drastically due to the water inflow, the electric heater needs to be doubled to work to raise the water temperature of the entire water storage tank to a predetermined temperature. This process takes a while and the thermal efficiency is not good. Power is consumed, and the user cannot use the water heater during this period.

Electric heaters do not provide instant or hot functionality.

The temperature in the water reservoir drops after a period of time. In order to maintain the temperature for a long time, it is necessary to add a heat storage material for the water storage tank.

To maintain the water temperature, the electric heater and the pump must be activated frequently, so that the energy is also consumed during the heat preservation period.

SUMMARY OF THE INVENTION It is an object of the present invention to provide a built-in heating module for a water storage type electric water heater that overcomes the problems of the external heating module of the prior art.

The built-in heating module of the electric water heater of the present invention comprises: at least one heater comprising a heat pipe and a heating unit; the heat pipe has a water inlet end, a water outlet end, and is connected to the water inlet end and the water outlet a water passage of the end; the heating unit is disposed on an outer surface of the heat pipe, and includes a heat generating film covering the outer surface of the heat pipe, and first and second electrodes disposed at the first end and the second end of the heat generating film; a heat conducting cover, the cover is attached to the outside of the heater, and a heat transfer space is formed between the heat conducting cover and the heater; the heat conducting cover has a water inlet end and a water outlet end; the water inlet end corresponds to the heat pipe entering the water end, The water outlet end corresponds to the water outlet end of the heat pipe; a ring seat is fixed to the bottom of the heat conduction cover, and the heater is fixed to the ring seat, the ring seat has a water inlet hole radially extending through the inner and outer walls, and a longitudinal through wall of the upper and lower walls An air convection hole and a wire hole; the water inlet hole corresponds to the heat transfer cover and the water inlet end of the heat pipe, the air convection hole corresponds to a heat transfer space, and the power supply wire of the heating unit penetrates the wire hole; a sealing disk , package The end of the heat conducting cover closes the heat pipe, the ring seat and the end of the heat conducting cover; the power supply wire of the heating unit is outwardly extended through the hole of the sealing disk; a mounting structure is disposed at the a heat conducting cover, the heating module is installed inside the water storage tank of an electric water heater through the mounting structure; A plurality of water stop rings are disposed between the heat pipe and the heat conducting cover, between the heat pipe and the ring seat, between the heat conducting cover and the sealing disk, and in the mounting structure.

Further comprising an electronic control unit electrically connected to the heating unit, the water inlet valve of the electric water heater is electrically connected to the electronic control unit; the electronic control unit obtains a water inlet signal of the water inlet valve to activate the heating unit Enter the heating mode.

The water temperature sensor is electrically connected to the electronic control unit; the electronic control unit obtains the water temperature sensor. The signal controls the heating unit to enter the holding mode from the heating mode.

Preferably, the heating module is installed at a position adjacent to the water inlet pipe of the water storage tank.

Preferably, the heating module is installed at a position adjacent to the water outlet pipe of the water storage tank.

Preferably, the water outlet pipe of the water storage tube extends through the heat pipe.

Preferably, the water inlet end of the heat conducting cover comprises one or several water inlet holes penetrating the side wall of the heat conducting cover, and the water inlet hole is located corresponding to the water inlet hole of the ring seat, and the water outlet end of the heat conducting cover comprises one or several pairs The water outlet of the water conduit should be hot.

The effect of the invention is that the heating film of the heating module generates heat, so that the heat pipe is rapidly heated to a predetermined temperature, and at the same time, the heat energy of the heat generating film is transmitted to the heat conducting cover through the heat transfer space, so that the heat conducting cover is also heated up to a predetermined temperature. temperature. The heating module has the advantage of rapid temperature rise, can reach the expected heating temperature in a very short time, and has uniform thermal efficiency.

The heating module is in contact with the water in the water storage cylinder. When the water storage cylinder is in the water, the heat pipe of the heating module heats the circulating water flowing into and out of the heat pipe by natural heat convection, and the heat conduction cover of the heating module borrows Heating the water in the water storage tank by heat conduction, in the heating module double Under the action of heavy heating, the storage temperature in the water storage tank can rise rapidly and evenly.

The heating module rapidly heats the water of the water storage tank in a heating mode. The heating module maintains the water in the water reservoir at a predetermined temperature in a heat retention mode.

When the hot water of the water storage tank is released and the cold water is replenished, the heating module is quickly switched from the heat preservation mode to the heating mode, and the water storage temperature in the water storage tank is not significantly reduced by the cold water filling. In addition, the most preferred mounting position of the heating module is adjacent to the water inlet pipe of the water storage tank, and the water in the vicinity of the water inlet pipe is preferentially heated, and the cold water can be prevented from being added to reduce the water temperature of the water storage cylinder.

The heating module of the invention is installed inside the water storage cylinder of the water storage type electric water heater, and is a built-in heating module, and the water in the water storage cylinder is heated by the heat pipe and the heat conduction cover directly contacting the water, but the heating unit and the power source Wires and the like are isolated from contact with water, ensuring stability and safety of the electrical device.

The water storage type electric water heater using the heating module of the invention has the main effects of instantaneous heating, rapid heating, maintaining water temperature for a long time, and avoiding a significant drop in water temperature during water storage of the water storage tank. The derivative effect from the main effect can be seen at the user end. The user does not have to wait for the entire storage tank to be heated. The hot water is available when the water is opened, and the water storage tank is forced to stop using water or use during the water supply. The problem of warm water. The other derivative effect lies in the processing of the water storage cylinder, which can reduce the use of the thermal insulation material of the cylinder body.

The invention is described by taking a water storage type electric water heater as an example, but the application range is not limited to this, that is, the heat type electric water heater and the water dispenser inner liner can also be used.

20‧‧‧heating module

21‧‧‧ heater

22‧‧‧heat pipe

221‧‧‧ water inlet

34‧‧‧ ring seat

341‧‧‧ water inlet

342‧‧‧Air convection hole

343‧‧‧Wire hole

222‧‧‧ water outlet

223‧‧‧Water channel

23‧‧‧heating unit

231‧‧‧Fever film

232‧‧‧first electrode

233‧‧‧second electrode

30‧‧‧heat cover

31‧‧‧heat transfer space

32‧‧‧ water inlet

321‧‧‧Water inlet 321

33‧‧‧ water outlet

331‧‧‧ water outlet

35‧‧‧ water ring

40‧‧‧Electric water heater

41‧‧‧Water storage tank

42‧‧‧ water inlet

421‧‧‧ Inlet valve

43‧‧‧Outlet

431‧‧‧Water outlet valve

44‧‧‧Water temperature sensor

45‧‧‧Water level sensor

46‧‧‧Electronic control unit

50‧‧‧ Sealing plate

60‧‧‧Installation structure

The first picture is a schematic diagram of a conventional electric water heater.

The second figure is a cross-sectional view of a first embodiment of a heating module for an electric water heater of the present invention.

The third picture is a cross-sectional view of the third figure III-III.

Figure 4 is a cross-sectional view showing a second embodiment of the heating module of the electric water heater of the present invention.

The fifth picture is a V-V cross-sectional view of the second figure.

Fig. 6 is a schematic view showing an example of use of the heating module of the first embodiment of the present invention.

FIG. 7 is a schematic view showing an example of use of the heating module according to the first embodiment of the present invention.

The central idea expressed in the column of the above summary of the invention is expressed by way of specific examples. Various items in the embodiments are depicted in terms of ratios, dimensions, amounts of deformation, or displacements that are suitable for illustration, and are not drawn to the proportions of actual elements, as set forth above.

As shown in the second and third figures, the heating module 20 of the present invention for use in the electric water heater 40 includes a heater 21 including a heat pipe 22 and a heating unit 23; the heat pipe 22 has a water inlet end 221, A water outlet end 222, and a water passage 223 connected to the water inlet end 221 and the water outlet end 222; the heat pipe 22 is made of a heat resistant insulating material (for example, quartz or ceramic). The heating unit 23 is disposed on the outer surface of the heat pipe 22; includes a heat generating film 231 uniformly and densely covering the outer surface of the heat pipe 22 by a known film coating technique, and is disposed at the first end of the heat generating film 231 And the first electrode 232 and the second electrode 233 of the second end, the first electrode 232 and the second electrode 233 are electrically connected to the power supply circuit through the conductive terminals, respectively, to supply power to the heat generating film 231. The preferred heat generating film 231 is a semiconductor conductive film, and the heat generating film 231 after energization causes the heat pipe 22 to rapidly and uniformly rise to a desired heating temperature.

A heat conducting cover 30, which is a material having thermal conductivity, is attached to the outside of the heater 21, and has a heat transfer space 31 between the heater 21 for generating heat radiation and heat convection benefits. The heat transfer cover 30 has a water inlet end 32 and a water outlet end 33. The water inlet end 32 of the heat conducting cover 30 includes one or several water inlet holes 321 penetrating through the wall surface. The position of the water inlet hole 321 corresponds to the water inlet end 221 of the heat pipe 22, and the water outlet end 33 of the heat conducting cover 30 contains one or several water inlet ends 33. The water outlet hole 331 of the water passage 223 of the heat pipe 22 is corresponding. The bottom of the heat conducting cover 30 is fixed with a ring seat 34 through which the heater 21 is fixed in the heat conducting cover 30. It is necessary to provide a plurality of water stop rings 35 between the ring seat 34 and the heater 21 and the heat conducting cover 30 to block water from entering the heat transfer space 31 or leaking outward. The ring seat 34 has a water inlet hole 341 that radially penetrates the inner and outer walls, and an air convection hole 342 and a wire hole 343 that longitudinally penetrate the upper and lower walls. The water inlet hole 341 corresponds to the water inlet end 32 of the heat conducting cover 30, and the air convection hole 342 corresponds to the heat transfer space 31, and the wire hole 343 is provided for the power supply wire of the heating unit 23.

A sealing disk 50 is assembled to the outside of the ring seat 34 to close the end of the heat pipe 22, the ring seat 34 and the heat conducting cover 30.

A mounting structure 60 is assembled to the interior of a water reservoir 41 and adjacent to the water inlet valve 421 of the water reservoir 41 by the mounting structure 60 and known sealing mounting techniques.

The second and third figures depict the heater 21 including a heat pipe 22, and the fourth and fifth figures depict the heater 21 including a plurality of heat pipes 22. The plurality of heat pipes 22 of the fourth and fifth figures are still fixed to the heat conducting cover 30 by the ring seat 34, and the heat transfer space 31 is still stored between each of the heat pipes 22 and the heat conducting cover 30. The ring seat 34 is provided with a plurality of water inlet holes 341 extending radially through the inner and outer walls, and each water inlet hole 341 corresponds to the water inlet end 221 of the heat pipe 22 and the water inlet end 32 of the heat conduction cover 30 to introduce water. In the heat pipe 22 . The water outlet end 33 of the heat conducting cover 30 is provided with a plurality of water outlet holes 331 corresponding to the water passages 223 of each of the heat pipes 22, respectively.

As shown in the sixth figure, the heating module 20 is used in the first example of the electric water heater 40. The heating module 20 is mounted to the interior of the water storage cartridge 41 of an electric water heater 40 by the above-described mounting structure 60 and known sealing mounting techniques. The figure describes a part of the water storage tank 41 and its main components, including an inlet pipe 42 connecting an external water source, a water inlet valve 421 for controlling the opening and closing of the inlet pipe 42, an outlet pipe 43 connecting the external pipes, and controlling the outlet pipe 43. a water outlet valve 431 for opening and closing, a water temperature sensor 44 for sensing the water temperature in the water storage tank 41, a water level sensor 45 for sensing the water level in the water storage tank 41, and a water level sensor 41 disposed outside the water storage tank 41 and The heating unit 23 and the water inlet valve 421 are electrically connected to the electronic control unit 46. The electronic control unit 46 is connected to an external power source (not shown) by a power line, and supplies the heating unit 23, the water inlet valve 421 and the water temperature sense. The power required by the detector 44 and the water level sensor 45. The electronic control unit 46 further includes a control panel (not shown) for setting and controlling the heating temperature of the heating unit 23 and the water temperature in the water storage tank 41.

Taking the water storage tank 41 as an empty storage water as an example, the water level sensor 45 transmits a waterless signal to the electronic control unit 46, and the electronic control unit 46 opens the water inlet valve 421 and activates the heating unit 23, The heat generating film 231 generates heat, and the heat pipe 22 is rapidly heated to reach the heating temperature. At the same time, the heat energy of the heat generating film 231 is transmitted to the heat conducting cover 30 through the heat transfer space 31, so that the heat conducting cover 30 also reaches the heating temperature. Accordingly, the heating module 20 is in a heating mode. The water pressure of the influent water allows a portion of the water entering the water storage tank 41 to enter the water passage 223 of the heat pipe 22 through the water inlet hole 321 of the heat transfer cover 30 and the water inlet hole 341 of the ring seat 34, and the other portions of the water are directly Into the water storage tank 41, water passing through the water passage 223 of the heat pipe 22 flows into the water storage tank 41 from the water discharge end 222 of the heat pipe 22 and the water discharge hole 331 of the heat transfer cover 30. During the process of entering the water, the water in the water storage tank 41 enters and exits the heat pipe 22 in the above-mentioned path to form a circulation, and the heat pipe 22 heats the circulating water, and the water that does not enter the heat pipe 22 passes through the heat conduction cover. 30 heating. The heat pipe 22 of the heating module 20 is open The circulating heat is heated by the superheat convection, and the heat conducting cover 30 of the heating module 20 heats the water in the water storage tank 41 by heat conduction. Under the double heat of the heating module 20, the water storage tank 41 The water temperature inside will rise rapidly.

When the water storage tank 41 is full of water, the water level sensor 45 transmits a full water signal to the electronic control unit 46, and the electronic control unit 46 closes the water inlet valve 421. The water temperature sensor 44 senses that the water temperature has reached the expected temperature, and the water temperature sensor 44 sends a signal to the electronic control unit 46. The electronic control unit 46 adjusts according to the signal of the water temperature sensor 44. The temperature of the heating module 20 is lowered and adjusted to the heat retention mode to maintain the water temperature in the water storage tank 41.

When the water outlet valve 431 of the water storage tank 41 is opened, the water storage cylinder 41 releases hot water from the water outlet pipe 43, and when the water level of the water storage tank 41 drops to a height, the water level sensor 45 sends a message to the electronic control unit 46. The electric control unit 46 opens the water inlet valve 421 according to the information, and simultaneously converts the heating module 20 from the heat preservation mode to the heating mode. When the external water source is filled into the water storage tank 41, the heating module 20 in the heating mode passes the above-mentioned nature. The heat convection and heat conduction heat the water in the water storage tank 41.

The key to starting the heating mode of the heating module 20 is that the inlet valve 421 is opened. When the inlet valve 421 is opened and the external water source enters the water storage cylinder 41, the heating module 20 immediately starts the heating mode, and the heating is started immediately. Therefore, it is possible to effectively prevent the problem that the temperature of the water in the water storage tank 41 is drastically lowered due to the cold water being replenished. In addition, the most preferred mounting position of the heating module 20 of the present invention is adjacent to the water inlet pipe 42, so that the water in the vicinity of the water inlet pipe 42 is preferentially heated, and the water temperature in the water storage cylinder 41 can be effectively prevented from being greatly increased by the cold water. The problem of falling.

The heating module 20 of the present invention is installed inside the water storage cylinder 41 of the water storage type electric water heater 40, and is a built-in heating module 20, which is directly contacted with water by the heat pipe 22 and the heat conduction cover 30. The water in the hot water storage tank 41, but the heating unit 23, the power supply wire, and the like are isolated from contact with water, ensuring stability and safety of the electric device.

The heating module 20 of the present invention has the advantage of rapid temperature rise, can achieve the expected heating temperature in a very short time, and the heating efficiency of the heating module 20 is uniform. The heating module 20 of the present invention is used in the water storage type electric water heater 40 as a preferred embodiment, because the heating module 20 can make the water storage type electric water heater 40 have instantaneous heating, rapid heating, and maintain water temperature for a long time, avoiding The main effect of the water storage tank 41 is that the water temperature is significantly lowered due to water inflow. The derivative effect generated from the main function can be seen at the user end. The user does not have to wait for the entire water storage tank 41 to be heated. When the water is turned on, hot water is available, and the water storage tank 41 is not forced to stop using water during the water supply. The problem of using cold water. The additional derivative effect lies in the processing of the water storage cylinder 41, which can reduce the use of the thermal insulation material of the cylinder body.

As shown in the seventh figure, the heating module 20 is used in the second example of the water storage type electric water heater 40. The water outlet pipe 43 of the electric water heater 40 is pivoted into the heat pipe 22. That is, the water discharged from the water outlet pipe 43 is once again heated by the heat pipe 22 to raise the water temperature.

The present invention is described as a preferred embodiment of the water storage type electric water heater 40, but the application range is not limited thereto, that is, the hot type electric water heater 40 and the water dispenser inner tank can also be used.

20‧‧‧heating module

21‧‧‧ heater

22‧‧‧heat pipe

221‧‧‧ water inlet

222‧‧‧ water outlet

223‧‧‧Water channel

23‧‧‧heating unit

231‧‧‧Fever film

232‧‧‧first electrode

233‧‧‧second electrode

30‧‧‧heat cover

31‧‧‧heat transfer space

32‧‧‧ water inlet

321‧‧‧ water hole

33‧‧‧ water outlet

331‧‧‧ water outlet

34‧‧‧ ring seat

341‧‧‧ water inlet

342‧‧‧Air convection hole

343‧‧‧Wire hole

35‧‧‧ water ring

Claims (7)

An internal heating module of an electric water heater, comprising: at least one heater comprising a heat pipe and a heating unit; the heat pipe has a water inlet end, a water outlet end, and a water connection end and the water outlet end a water passage; the heating unit is disposed on an outer surface of the heat pipe, and includes a heat generating film covering the outer surface of the heat pipe, and first and second electrodes disposed at the first end and the second end of the heat generating film; a cover, the cover is attached to the outside of the heater, and a heat transfer space is formed between the heat transfer cover and the heater; the heat transfer cover has a water inlet end and a water outlet end; the water inlet end corresponds to the heat pipe inlet end, the water outlet The end is corresponding to the water outlet end of the heat pipe; a ring seat is fixed to the bottom of the heat conducting cover, and the heater is fixed to the ring seat, the ring seat has a water inlet hole radially extending through the inner and outer walls, and air longitudinally penetrating the upper and lower walls a convection hole and a wire hole; the water inlet hole corresponds to the heat transfer cover and the water inlet end of the heat pipe, the air convection hole corresponds to a heat transfer space, the power supply wire of the heating unit penetrates the wire hole; a sealing disk, Packaged in An end portion of the heat conducting cover, the end of the heat pipe, the ring seat and the heat conducting cover is closed; the power supply wire of the heating unit is outwardly extended through the hole of the sealing disk; and a mounting structure is disposed at the heat conducting a cover, the heating module is installed in the water storage cylinder of the electric water heater through the mounting structure; a plurality of water stopping rings are respectively disposed between the heat pipe and the heat conducting cover, between the heat pipe and the ring seat, and the heat conduction Between the cover and the sealing disk, and in the mounting structure. The built-in heating module of the electric water heater according to claim 1, further comprising an electronic control unit electrically connected to the heating unit, the water inlet valve of the electric water heater and the electronic control unit Electrical connection; the electronic control unit obtains the water inlet signal of the water inlet valve to start the heating unit to enter the heating mode. The built-in heating module of the electric water heater according to claim 2, further comprising a water temperature sensor disposed in the water storage tank for sensing water temperature, the water temperature sensor and the electric The control unit is electrically connected; the electronic control unit obtains the signal of the water temperature sensor to control the heating unit to enter the heat preservation mode from the heating mode. The built-in heating module of the electric water heater according to claim 1, wherein the heating module is installed at a position adjacent to the water inlet pipe of the water storage tank. The built-in heating module of the electric water heater according to claim 4, wherein the heating module is installed at a position adjacent to the water outlet pipe of the water storage tank. The built-in heating module of the electric water heater according to claim 5, wherein the water outlet pipe of the water storage tube extends through the heat pipe. The built-in heating module of the electric water heater according to claim 1, wherein the water inlet end of the heat conducting cover comprises one or several water inlet holes penetrating the side wall of the heat conducting cover, and the position of the water inlet hole corresponds to the ring seat The water inlet hole of the heat conducting cover includes one or several water outlet holes corresponding to the water passage of the heat pipe.