CN217236114U

CN217236114U - Water heater

Info

Publication number: CN217236114U
Application number: CN202220826702.5U
Authority: CN
Inventors: 张子刚; 朱金飞
Original assignee: Suzhou Yiwei Lianke Electronic Technology Co ltd
Current assignee: Suzhou Yiwei Lianke Electronic Technology Co ltd
Priority date: 2022-04-07
Filing date: 2022-04-07
Publication date: 2022-08-19
Anticipated expiration: 2032-04-07

Abstract

The utility model discloses a water heater, including outer container and inside subassembly, the outer container includes casing and outer container casing under the outer container, the internal water tank, circuit board, relay, fuse, temperature controller, temperature sensor, PTC heating element of installing of outer container inferior valve, panel beating subassembly, connector subassembly, PTC heating element, temperature controller, temperature sensor and the equal fixed mounting of panel beating subassembly form the assembly that generates heat on the interior face of casing under the outer container, and wherein the panel beating subassembly is in the same place water tank and a plurality of PTC heating element assembly to guarantee its tight fit, the equal fixed mounting of circuit board, relay, fuse is in the water tank side. The beneficial effects of the utility model are that, changed water heater's control scheme board mounted position to the side, the circuit board outside increases plastic casing insulating and thermal-insulated, and the high temperature that furthest reduced the heater is to the influence of circuit board, and when relay, circuit board became invalid in succession, current fuse fuses, and disconnection high voltage power supply finally amputates the source of high-pressure risk.

Description

Water heater

Technical Field

The utility model relates to a new energy automobile PTC water heater field, especially a water heater.

Background

In the field of electric automobiles, high-power water heaters are more and more widely applied, the existing products have great potential safety hazards, the product performance is unreliable, the power is insufficient, and the like, a new more reliable product is needed to support the field of electric automobiles, and the points needing improvement are as follows:

1. the traditional water heater control circuit board is paved on the PTC heating module. When the heater works in a cold area for a long time, high temperature can be generated in the heater, and electronic components on the control circuit board work for a long time under the influence of the high temperature of the heater, so that the thermal breakdown or failure of the electronic components is easily caused;

2. the traditional PTC water heater is controlled by an IGBT (insulated gate bipolar transistor), but the IGBT is easy to be thermally broken down in a high-temperature state; after the IGBT fails, the PTC high temperature and the PTC high pressure are not controlled, and the risks of high temperature and high voltage are easily caused.

3. The conventional water heater is not provided with a current fuse, and when the impact current of the heater is too large or the ptc breakdown caused by the voltage fluctuation of the whole vehicle and other reasons causes high-voltage short circuit, the current fuse of the whole vehicle outside the heater is burnt, so that the fire risk is caused;

4. the traditional PTC water heater is simply controlled by a relay, but the service life of the relay is the switching frequency of the relay, and when the relay is frequently switched at a high temperature, contact adhesion easily occurs, and the capability of cutting off a high-voltage power supply is lost.

5. The traditional PTC water heater mounting foot is formed by plastic or aluminum die-casting integrated pouring, and in the actual use process, the mounting foot is easy to break, so that the whole machine cannot be used continuously.

6. The temperature sensing of the traditional PTC water heater is composed of a single temperature sensor, and the temperature sensor is easy to break down after long-term operation in a high-temperature state.

SUMMERY OF THE UTILITY MODEL

The utility model aims at solving the problem and designing a water heater.

The utility model discloses a water heater, including outer container and inside subassembly, the outer container includes casing and outer container upper housing under the outer container, the internal water tank, circuit board, relay, fuse, temperature controller, temperature sensor, PTC heating element of installing of outer container inferior valve, panel beating subassembly, connector subassembly, PTC heating element, temperature controller, temperature sensor, panel beating subassembly fixed mounting form the assembly that generates heat under the outer container of water tank on the casing, and wherein the panel beating subassembly assembles water tank and a plurality of PTC heating element together to guarantee its tight fit, the equal fixed mounting of circuit board, relay, fuse is in the water tank side.

As right the utility model discloses a further explanation, PTC heating element assembles between the flat pipe of water tank, and PTC heating element hugs closely with flat pipe to be parallel distribution with flat pipe.

As to the utility model discloses a further explanation, the periphery of circuit board is provided with plastic casing, circuit board fixed mounting be in the plastic casing, the power control element fixed mounting of circuit board be in on the heat dissipation aluminum plate of water tank, plastic casing's side fixed mounting be in the side of water tank.

As a further explanation of the utility model, a temperature sensor and a temperature controller are arranged on the upper end face of the water tank.

As right the utility model discloses a further explanation, the relay set up in one side of water tank, one side of water tank is provided with the current fuse, and the high-tension electricity passes through the line connection through the connector the current fuse, the current fuse pass through the circuit with relay one end is connected, the relay pass through the circuit with the circuit board is connected, the circuit board passes through the circuit and is connected with PTC heating element, forms the high-voltage loop. The temperature sensor and the temperature controller are connected with the circuit board through a low-voltage circuit to form a low-voltage feedback loop.

As a further explanation of the present invention, the outer part of the outer case lower case is provided with a fixed corner fitting, which is provided at the upper end and the lower end of the outer case lower case.

As right the utility model discloses a further explanation, the outer container comprises casing under casing on the outer container and the outer container, casing equipment has a plurality of breather valve on the outer container, by combination screw fixed mounting between casing and the outer container casing under the outer container.

The water heater has the advantages that 1, the installation position of the control circuit board of the water heater is changed to the side surface, and the plastic shell is additionally arranged outside the circuit board for insulation and heat insulation, so that the influence of the high temperature of the heater on the circuit board is reduced to the maximum extent;

2. a relay protection strategy is added, unnecessary relay switches are reduced as much as possible, the switching times are reduced, and the service life is prolonged;

3. the relay control is added, when the IGBT of the circuit board is normally on, the relay can still cut off the high-voltage power supply, and the control of high-voltage electricity is realized;

4. and a current fuse is added, and when the relay and the circuit board are failed in sequence, the current fuse is fused to disconnect a high-voltage power supply, and finally the source of high-voltage risk is cut off.

Drawings

FIG. 1 is a schematic view of the inner structure of the outer box of the present invention;

fig. 2 is a schematic structural view of the housing on the outer box of the present invention.

In the figure, 1, a lower shell of an outer box; 2. a PTC heating element; 3. a water tank; 4. a temperature sensor; 5. a heat dissipation aluminum plate; 6. a connector assembly; 7. a circuit board; 8. a relay; 9. a temperature controller; 10. a fuse; 11. a sheet metal component; 12. a housing on the outer box; 13. a vent valve; 14. and (5) combining screws.

Detailed Description

The utility model discloses it is right to combine the attached drawing below to describe specifically the utility model discloses, as shown in fig. 1 and fig. 2, a water heater comes the concrete structural arrangement of simple explanation earlier, including outer container and inside subassembly, install water tank 3, circuit board 7, relay 8, fuse 10, temperature controller 9, temperature sensor 4, PTC heating element 2 in the casing 1 under the outer container, panel beating subassembly 11, the 6 subassemblies of connector, PTC heating element 2, temperature controller 9, temperature sensor 4, panel beating subassembly 11 are fixed in water tank 3, form the assembly that generates heat, and wherein panel beating subassembly 11 assembles water tank 3 and a plurality of PTC heating element 2 together to guarantee its tight fit, the equal fixed mounting of circuit board 7, relay 8, fuse 10 prevents the influence of high temperature to electronic components and parts in the water tank 3 side.

The periphery of circuit board 7 is provided with the plastic casing, 7 fixed mounting of circuit board in the plastic casing, the power control component fixed mounting of circuit board 7 be in on the heat dissipation aluminum plate 5 of water tank 3, the side fixed mounting of plastic casing is in the side of water tank 3, furthest reduces the influence of the high temperature of heater to circuit board 7.

Relay 8 set up in one side of water tank 3, one side of water tank 3 is provided with current fuse 10, and high-tension electricity passes through the line connection through connector 6 current fuse 10, current fuse 10 pass through the circuit with 8 one end of relay is connected, relay 8 pass through the circuit with circuit board 7 is connected, circuit board 7 passes through the circuit and is connected with PTC heating element 2, forms the high-voltage loop. The temperature sensor 4 and the temperature controller 9 are connected with the circuit board 7 through a low-voltage circuit to form a low-voltage feedback loop.

Wherein, increase relay 8 protection strategy: unnecessary switches of the relay 8 are reduced as much as possible, the switching times are reduced, and the service life is prolonged; the control of the circuit board 7 is added, when the relay 8 is adhered, the circuit board 7 can still cut off the high-voltage power supply, and the control of high-voltage electricity is realized; and a current fuse 10 is added, when the relay 8 and the circuit board 7 are failed in sequence, the current fuse 10 is fused, a high-voltage power supply is disconnected, and finally a source of high-voltage risks is cut off.

The upper end surface of the water tank 3 is provided with a temperature sensor 4 and a temperature controller 9, when the temperature sensor 4 fails, the heater loses the temperature detection function, so that the temperature controller 9 is added to carry out auxiliary temperature control, when the temperature sensor 4 fails, the temperature controller 9 continues sensing temperature, and when overtemperature occurs, the high-voltage power supply is cut off, so that the control of the high-voltage power supply under the failure state of the temperature sensor 4 is realized;

for the protection strategy of the temperature sensor 4, a coping strategy for high-temperature or long-time work is added on software, so that the damage to the temperature sensor 4 caused by long-time work in a high-temperature state is avoided. For example, when the high temperature operation exceeds a certain time, the operation power of the heater is closed or reduced, so as to achieve the purpose of temperature reduction.

And a relay 8 protection strategy is added, unnecessary switching of the relay 8 is reduced as much as possible, the switching times are reduced, and the service life is prolonged.

The relay 8 is added for control, when the IGBT of the circuit board 7 is normally on, the relay 8 can still cut off the high-voltage power supply, and the control of high-voltage electricity is realized.

And a current fuse 10 is added, and when the relay 8 and the circuit board 7 fail successively, the current fuse 10 fuses to cut off a high-voltage power supply, and finally the source of high-voltage risks is cut off.

The outside of water tank 3 is provided with fixed corner fittings, and fixed corner fittings set up in the outside upper end and the lower extreme of water tank 3 for with water tank 3 fixed mounting on different panels.

The working principle is as follows: PTC heating element 2 and water tank 3's flat pipe parallel distribution to receive the centre gripping of panel beating subassembly 11, both hug closely together, and heat transfer efficiency is higher. When the PTC heating component 2 is electrified, the PTC heating component 2 generates heat, and water in the flat pipe of the water tank 3 is heated to a specified temperature. Wherein the control principle of the heating is as follows: feedback temperature information for circuit board 7 through temperature sensing controller, circuit board 7 is through its self IGBT and control relay 8's output voltage, and then control PTC electric heat piece's the power that generates heat, and when temperature sensor 4 became invalid, the heater just lost the function of temperature detection, the event increased temperature controller 9 carries out auxiliary temperature control, when temperature sensor 4 became invalid, temperature controller 9 disconnection, thereby disconnection relay 8, cut off high voltage power supply, thereby realize the control to high voltage power supply under temperature sensor 4 failure state, increase current fuse 10 at relay 8 and circuit board 7 front end, when relay 8, circuit board 7, when failing in succession, current fuse 10 fuses, cut off high voltage power supply, finally the source of excision high voltage risk. The voltage input and the voltage output of the multi-line protection relay 8, and the multi-scheme temperature control system enables the water heater to be safer and more reliable in the heating work, so that the danger degree of the new energy automobile in the use process is greatly reduced.

Above-mentioned technical scheme has only embodied the utility model discloses technical scheme's preferred technical scheme, some changes that this technical field's technical staff probably made to some parts wherein have all embodied the utility model discloses a principle belongs to within the protection scope of the utility model.

Claims

1. A water heater comprises an outer box and an inner component, wherein the outer box comprises an outer box lower shell (1) and an outer box upper shell (12), a water tank (3), a circuit board (7), a relay (8), a fuse (10), a temperature controller (9), a temperature sensor (4), a PTC heating assembly (2), a sheet metal assembly (11) and a connector assembly (6) are arranged in the outer box lower shell (1), it is characterized in that the PTC heating component (2), the temperature controller (9), the temperature sensor (4) and the sheet metal component (11) are fixedly arranged on the lower shell (1) of the outer box of the water tank (3) to form a heating assembly, wherein the sheet metal component (11) assembles the water tank (3) and the PTC heating components (2), and guarantee its tight fit, circuit board (7), relay (8), fuse (10) all fixed mounting are in water tank (3) side.

2. A water heater according to claim 1, wherein the PTC heating element (2) is assembled between the flat tubes of the water tank (3), and the PTC heating element (2) is closely attached to the flat tubes and is distributed in parallel with the flat tubes.

3. A water heater according to claim 1, characterized in that a plastic casing is arranged on the periphery of the circuit board (7), the circuit board (7) is fixedly mounted in the plastic casing, the power control element of the circuit board (7) is fixedly mounted on the heat dissipation aluminum plate (5) of the water tank (3), and the side surface of the plastic casing is fixedly mounted on the side surface of the water tank (3).

4. A water heater according to claim 1, characterized in that the water tank (3) is provided with a temperature sensor (4) and a thermostat (9) on its upper end face.

5. A water heater according to claim 1, wherein the relay (8) is arranged on one side of the water tank (3), a current fuse (10) is arranged on one side of the water tank (3), high voltage is connected to the current fuse (10) through a connector (6), the current fuse (10) is connected to one end of the relay (8) through a circuit, the relay (8) is connected to the circuit board (7) through a circuit, the circuit board (7) is connected to the PTC heating assembly (2) through a circuit to form a high voltage loop, and the temperature sensor (4) and the temperature controller (9) are connected to the circuit board (7) through a low voltage circuit to form a low voltage feedback loop.

6. A water heater according to claim 1, wherein the outer part of the outer box lower case (1) is provided with fixing angle members provided at the upper and lower ends of the outer part of the outer box lower case (1).

7. The water heater according to claim 1, wherein the outer box is composed of an upper outer box shell (12) and a lower outer box shell (1), the upper outer box shell (12) is assembled with a plurality of vent valves (13), and the upper outer box shell (12) and the lower outer box shell (1) are fixedly installed by combination screws (14).