CN215360845U - PTC water heater - Google Patents

Abstract

The utility model provides a water heating PTC heater, which comprises an upper shell, a lower shell, a water-stop sheet and a heating assembly, wherein the upper shell and the lower shell are separated by the water-stop sheet, and an upper water chamber and a lower water chamber are respectively formed in the upper shell and the lower shell; the same end of the upper water chamber and the lower water chamber is respectively provided with a water outlet positioned on the upper shell and a water inlet positioned on the lower shell, and the other ends of the upper water chamber and the lower water chamber are communicated with each other relative to the end with the water outlet and the water inlet; the heating assembly is provided with a circuit board and a plurality of PTC heating blocks connected with the circuit board, and each PTC heating block penetrates through the upper shell and the water-stop sheet, and is partially positioned in the upper water chamber and partially positioned in the lower water chamber. The water heating PTC heater of the utility model can better utilize the PTC heating block through the double-flow design, and the heater has better use effect.

Description

PTC water heater

Technical Field

The utility model relates to the technical field of automobile air conditioner parts, in particular to a water heating PTC heater, and meanwhile, the utility model also relates to an assembly method of the water heating PTC heater.

Background

With the increasing prominence of fuel supply and demand and environmental pollution problems, new energy automobiles are developed in all countries in the world. In a traditional automobile, because the internal combustion engine pushes a piston to do work by combustion and expansion of fuel, internal energy is converted into kinetic energy, the conversion efficiency is low, and more waste heat is generated, a heat source for heating is generally the waste heat of the internal combustion engine. The heating system reasonably utilizes originally useless waste heat, but the heating system also means that heating can be carried out only in the state that the internal combustion engine is started, and the pure electric automobile has no internal combustion engine, and the hybrid electric automobile also needs heating in the pure electric mode, so that the adoption of the PTC heater for heating becomes the choice of most new energy vehicle enterprises.

The PTC heater for heating the new energy automobile is generally divided into an air heating mode and a water heating mode, wherein the air heating mode directly heats air by using the PTC and blows the air into the automobile by a fan, and the water heating mode heats coolant by the PTC through special equipment and provides warm air for the automobile through a warm air core body. Compared with an air heating mode, the water heating mode has the advantages of simple structure, high heating speed, stable temperature, softness and comfort, and better use effect because the heated cooling liquid can also heat the power battery. Therefore, the design and development of the water heating PTC heater become important research and development directions for various enterprises.

SUMMERY OF THE UTILITY MODEL

In view of the above, the present invention is directed to a PTC water heater, which can provide a PTC water heater with a better use effect.

In order to achieve the purpose, the technical scheme of the utility model is realized as follows:

a water heating PTC heater comprising an upper case, a lower case, a water stop plate and a heating assembly, wherein:

the upper shell and the lower shell are separated by the water-stop sheet, and an upper water chamber and a lower water chamber are respectively formed in the upper shell and the lower shell;

the same end of the upper water chamber and the lower water chamber is respectively provided with a water outlet positioned on the upper shell and a water inlet positioned on the lower shell, and the other end of the upper water chamber is communicated with the other end of the lower water chamber relative to the end with the water outlet and the water inlet;

the heating assembly is provided with a circuit board and a plurality of PTC heating blocks connected with the circuit board, and each PTC heating block penetrates through the upper shell and the water stop plate, is partially positioned in the upper water chamber, and is partially positioned in the lower water chamber.

Furthermore, one end of the water-stop sheet is provided with a water through hole; the upper water chamber and the lower water chamber are communicated through the limber holes.

Further, a plurality of the PTC heating blocks are arranged in a plurality of rows; in each row of the PTC heating blocks, the adjacent PTC heating blocks are arranged in a staggered mode.

Further, the water heating PTC heater further comprises an electric box; the electrical box is fixedly connected with the upper shell and the lower shell through mounting brackets.

Furthermore, the top of the upper shell is fixedly connected with a main board; the circuit board is fixed on the mainboard, and the PTC heating blocks are arranged through the mainboard together; the main board is provided with a sealing cover for sealing the circuit board.

Further, the water heating PTC heater further comprises an inlet water temperature sensor and an outlet water temperature sensor; the inlet water temperature sensor penetrates through the main board, the upper shell and the water-stop sheet and extends into the lower water chamber and is arranged close to the water inlet; the water outlet temperature sensor penetrates through the main board and the upper shell and extends into the upper water chamber and is arranged close to the water outlet.

Furthermore, a waterproof pipe is sleeved outside each PTC heating block; the waterproof pipe penetrates through the main board, the upper shell and the water-stop sheet, and two ends of the waterproof pipe are connected with the main board and the lower shell respectively.

Furthermore, a plurality of connecting bulges are arranged on the inner wall of the lower shell, and the connecting bulges are arranged in one-to-one correspondence with the waterproof pipes; one end of each waterproof pipe is sleeved on the corresponding connecting bulge and fixedly connected with the connecting bulge.

Further, the water inlet and the water outlet are respectively riveted on the lower shell and the upper shell; the main board and the upper shell, the water-stop sheet and the lower shell are fixedly connected through rivets respectively; the mainboard with connect protruding with between the waterproof pipe, go up the casing, the water-stop sheet with between the casing down, and the water inlet with between the casing down, the delivery port with it is sealed through brazing respectively between the casing.

Compared with the prior art, the utility model has the following advantages:

the water heating PTC heater of the utility model can heat the flowing cooling liquid through the heating of the PTC heating block in the heating assembly, thereby realizing a water heating mode.

Meanwhile, the water inlet and the water outlet are respectively positioned on the lower shell and the upper shell at the same end, and the upper water chamber and the lower water chamber at the other end are communicated, so that the double-flow design of flowing through the cooling liquid by the integral heater can be realized. And the coolant liquid (the temperature is the lowest and the highest) of water inlet, delivery port one end heats through same PTC heating piece, and other end temperature is close also for heating through same PTC heating piece, so can utilize every PTC heating piece better, make it heat more fast to can promote heating element's heating efficiency, and then make this heater have better result of use.

In addition, the upper shell and the lower shell directly form the cooling liquid flow channel, the volume of the cooling liquid flow channel can be increased, the heat exchange area is increased, the flow resistance is reduced, and the overall size of the heater can be reduced.

The utility model also provides an assembly method of the water heating PTC heater, which comprises the following steps:

riveting the water outlet and the main board with the upper shell respectively, and riveting the water inlet with the lower shell;

stacking the upper shell, the water-stop sheet and the lower shell together;

penetrating each waterproof pipe through the main board, the upper shell and the water-stop sheet, and sleeving the waterproof pipes on the corresponding connecting bulges;

riveting and fastening an upper shell, the water-stop sheet and the lower shell;

the outer surface of one end of the waterproof pipe and the main board, the inner surface of the other end of the waterproof pipe and the connecting bulge, the upper shell, the water-stop sheet and the lower shell, the water inlet and the lower shell and the water outlet and the upper shell are respectively sealed by brazing;

and inserting each PTC heating block into the corresponding waterproof pipe, installing the heating assembly, and installing the sealing cover on the main board.

The assembling method of the water heating PTC heater can realize the assembling and forming of the water heating PTC heater, and not only is the production and the manufacture convenient and the weight and the cost are reduced by adopting the riveting fixing and the brazing sealing modes, but also the durability, the safety and the reliability of the heater can be improved.

In addition, the outer surface of one end of the waterproof pipe is sealed with the main board in a brazing mode, the inner surface of the other end of the waterproof pipe is sealed with the connecting protrusion in a brazing mode, the waterproof pipe can be made of hollow pipes with openings at two ends, the thickness of the waterproof pipe can be reduced, cost can be reduced, and heat transfer capacity can be improved.

Drawings

The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate an embodiment of the utility model and, together with the description, serve to explain the utility model and not to limit the utility model. In the drawings:

fig. 1 is a schematic structural view of a plumbing PTC heater according to an embodiment of the present invention;

fig. 2 is an exploded view of a water-heated PTC heater according to an embodiment of the present invention;

FIG. 3 is a schematic structural diagram of an upper housing according to an embodiment of the present invention;

fig. 4 is a schematic structural diagram of a motherboard according to an embodiment of the present invention;

FIG. 5 is a schematic structural diagram of a lower housing according to an embodiment of the present invention;

fig. 6 is a schematic structural view of a water-stop sheet according to an embodiment of the present invention;

FIG. 7 is a schematic structural diagram of a heating assembly according to an embodiment of the present invention;

FIG. 8 is a schematic structural view of a waterproof tube according to an embodiment of the present invention;

fig. 9 is a schematic view of a PTC heating block misaligned according to an embodiment of the present invention;

fig. 10 is a schematic view illustrating a main board and an upper housing according to an embodiment of the present invention after being connected;

fig. 11 is a schematic view of the upper housing, the water-stop sheet, and the lower housing according to the embodiment of the present invention after being connected;

FIG. 12 is a schematic view of a heating assembly according to an embodiment of the present invention after installation;

fig. 13 is a schematic flow chart of the cooling fluid in the water-heating PTC heater according to the embodiment of the present invention;

description of reference numerals:

1. an upper housing; 2. a lower housing; 3. a main board; 4. a water inlet; 5. a water outlet; 6. a water-stop sheet; 7. a sealing cover; 8. a first rivet; 9. an electrical box; 10. mounting a bracket; 11. mounting screws; 12. a PTC heating block; 13. a circuit board; 14. a second rivet; 15. a waterproof pipe; 16. a circuit board mounting post; 17. an inlet water temperature sensor; 18. an effluent temperature sensor;

101. an upper housing through hole; 102. the first upper shell is riveted with the hole; 103. the second upper shell is riveted with the hole; 104. the upper shell is provided with a through hole; 105. a lower outlet water temperature sensor via hole; 106. a medium inlet water temperature sensor is connected with a hole;

201. riveting holes in the lower shell; 202. a connecting projection; 203. the lower shell is provided with a through hole;

301. a main board through hole; 302. riveting holes in the main board; 303. the upper water outlet temperature sensor is provided with a through hole; 304. an upper inlet water temperature sensor via hole; 305. mounting post fixing holes; 306. a claw;

601. a water-stop sheet through hole; 602. a water through hole; 603. riveting holes of the water-stop sheet; 604. a lower inlet water temperature sensor via hole; 605. the water-stop sheet is provided with a through hole.

Detailed Description

It should be noted that the embodiments and features of the embodiments may be combined with each other without conflict.

In the description of the present invention, it should be noted that, if terms indicating orientation or positional relationship such as "upper", "lower", "inside", "outside", etc. appear, they are based on the orientation or positional relationship shown in the drawings and are only for convenience of describing the present invention and simplifying the description, but do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus, should not be construed as limiting the present invention. Furthermore, the appearances of the terms first, second, etc. in this specification are not necessarily all referring to the same item, but are instead intended to cover the same item.

In addition, in the description of the present invention, the terms "mounted," "connected," and "connecting" are to be construed broadly unless otherwise specifically limited. For example, the connection can be fixed, detachable or integrated; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. To those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood in conjunction with specific situations.

The present invention will be described in detail below with reference to the embodiments with reference to the attached drawings.

The present embodiment relates to a water heating PTC heater, which is generally used in an air conditioning system of an automobile to heat coolant so that warm air can be supplied into the vehicle through a warm air core.

In overall construction, as shown in fig. 1 and 2 in conjunction therewith, the plumbing PTC heater includes an upper case 1, a lower case 2, a water-stop sheet 6 and a heating assembly. The upper shell 1 and the lower shell 2 are separated by a water-stop sheet 6, and an upper water chamber and a lower water chamber are respectively formed in the upper shell and the lower shell. The same end of the upper water chamber and the lower water chamber is respectively provided with a water outlet 5 positioned on the upper shell 1 and a water inlet 4 positioned on the lower shell 2, and the other ends of the upper water chamber and the lower water chamber are also communicated relative to the end with the water outlet 5 and the water inlet 4. The heating assembly has a circuit board 13 and a plurality of PTC heating blocks 12 connected to the circuit board 13, and each PTC heating block 12 is disposed through the upper case 1 and the water-stop sheet 6 such that each PTC heating block 12 is partially located in the upper water chamber and partially located in the lower water chamber.

Specifically, the upper case 1 in the present embodiment has a box shape with a lower end opened as shown in fig. 3, and a plurality of upper case through holes 101 are provided in the upper case 1, and each upper case through hole 101 is used for passing through the PTC heating block 13 in the heating module. A first upper housing riveting hole 102, a second upper housing riveting hole 103, an upper housing mounting via hole 104, a lower outlet water temperature sensor via hole 105 and an inlet water temperature sensor via hole 106 are also formed in the upper housing 1.

The first upper case staking hole 102 is used for connection between the upper case 1 and a main board 3 described below, and the second upper case staking hole 103 is used for connection between the upper case 1 and the water stop plate 6 and the lower case 2. The upper case mounting through-hole 104, which constitutes a heater mounting hole together with the water stop plate mounting through-hole 605 and the lower case mounting through-hole 203 described below, is used for mounting the water heating PTC heater of the embodiment in a vehicle as a constituent part of the entire heater mounting hole.

The lower outlet temperature sensor via hole 105 and the inlet temperature sensor via hole 106 are used for passing through an outlet temperature sensor 18 and an inlet temperature sensor 17, which will be described below, respectively, for mounting the two. Further, the lower outlet temperature sensor via hole 105 constitutes a via hole structure for providing the outlet temperature sensor 18 together with an upper outlet temperature sensor via hole 303 described below on the main board 3 as a whole. The mid inlet temperature sensor via 106, together with the inlet temperature sensor via 304 and the inlet outlet temperature sensor via 604 described below, form a via structure for the inlet temperature sensor 17.

In this embodiment, as a preferred embodiment, the water outlet 5 is also riveted to the upper shell 1, and the riveting manner is performed by a conventional riveting process. In addition, as a preferred embodiment, the main board 3 is further fixed to the top of the upper housing 1, the circuit board 13 is fixed to the main board 3, the PTC heating blocks 12 are also arranged to pass through the main board 3, and the main board 3 is further provided with a sealing cover 7 for sealing the circuit board 13.

At this time, the main board 3 has a structure as shown in fig. 4, and the periphery of the main board 3 is formed with an upward flange, and is in a box shape with an open upper end, and a plurality of main board through holes 301 are also provided on the main board 3 corresponding to the arrangement of the upper housing through holes 101 on the upper housing 1, and the main board through holes 301 are used for the PTC heating blocks 12 to pass through. A main board riveting hole 302, an upper outlet water temperature sensor via hole 303, an upper inlet water temperature sensor via hole 304, a mounting post fixing hole 305 and a clamping claw 306 are further also provided on the main board 3.

The plurality of main board riveting holes 302 are arranged in one-to-one correspondence with the first upper case riveting hole 102 on the upper case 1, so as to connect the main board 3 and the upper case 1. The upper outlet water temperature sensor via hole 303 and the upper inlet water temperature sensor via hole 304 are, as described above, specifically for passing through the outlet water temperature sensor 18 and the inlet water temperature sensor 17 for mounting the both. The mounting post fixing hole 305 is formed as a part of the whole heater mounting hole, and the claw 306 is formed on a turned edge formed around the main plate 3 and is specifically used for clamping and fixing the sealing cover 7.

The structure of the lower case 2 of the present embodiment is, as shown in fig. 5, similar to the structure of the upper case 1 described above, provided with a lower case staking hole 201 and a lower case mounting via 203 on the lower case 2, respectively. The lower housing staking hole 201 is used for connecting the upper housing 1, the water-stop sheet 6 and the lower housing 2, and the lower housing mounting through hole 203 is used for mounting the heater as a part of the whole heater mounting hole. The water outlet 5 can be riveted on the lower shell 2 in the same way as the water outlet 5, and the riveting mode can be realized by adopting a conventional riveting process.

In addition, a plurality of connecting projections 202 are also formed in the lower case 2, and each connecting projection 202 is arranged in one-to-one correspondence with the above-described main board through hole 301 on the main board 3, the upper case through hole 101 on the upper case 1, and a later-described water blocking plate through hole 601 on the water blocking plate 6. And each of the coupling projections 202 is also used for coupling with one end of the waterproof tube 15 described below.

The structure of the water stop plate 6 is as shown in fig. 6, as described above, a plurality of water stop plate through holes 601 are provided on the water stop plate 6, and each water stop plate through hole 601 is arranged in one-to-one correspondence with the main plate through hole 301, the upper housing through hole 101, and the connecting protrusion 202, and is specifically configured to allow the PTC heating block 12 to pass through. Besides the water stop plate through hole 601, the water stop plate 6 is further provided with a water through hole 602, a water stop plate riveting hole 603, a lower inlet water temperature sensor through hole 604, and a water stop plate mounting through hole 605.

The water passage hole 602 is formed at one end of the water blocking plate 6, and the communication between the upper and lower water chambers is also established through the water passage hole 602. The water-stop plate riveting hole 603 is arranged in one-to-one correspondence with the second upper shell riveting hole 103 and the lower shell riveting hole 201, so as to connect the upper shell 1, the water-stop plate 6 and the lower shell 2. The lower inlet water temperature sensor via hole 604 is used for the inlet water temperature sensor via hole 17 to pass through so as to enter the lower water chamber, and the water stop plate mounting via hole 605 is used as a part of the lower water chamber and forms a mounting hole of the heater together with the upper shell mounting via hole 104 and the lower shell mounting via hole 203.

The structure of the heating assembly of this embodiment is shown in fig. 7, wherein the PTC heating blocks 12 are block-shaped structures loaded with ceramic PTC heating elements, and the circuit board 13 is a conventional circuit board structure for electrically connecting the PTC heating blocks 12 and also electrically connecting the inlet water temperature sensor 17 and the outlet water temperature sensor 18.

In addition, the plurality of PTC heating blocks 12 of the present embodiment are also arranged in a plurality of rows, and specifically, each PTC heating block 12 is arranged in two rows in the present embodiment, and at the same time, each main plate through hole 301, each upper housing through hole 101, each water stop plate through hole 601, each connecting protrusion 202, and the like through which each PTC heating block 12 passes are also in one-to-one correspondence with each PTC heating block 12, so as to adopt the same arrangement.

Further, as a preferred embodiment, on the basis of being arranged in a plurality of rows, in each row of the PTC heating blocks 12 of the present embodiment, adjacent PTC heating blocks 12 are also arranged in a staggered manner. Of course, in synchronization with the offset arrangement of the rows of PTC heating blocks 12, the rows of upper housing through holes 101, the water stop sheet through holes 601, and the connecting protrusions 202 are also offset and arranged in accordance with the arrangement of the rows of PTC heating blocks 12. Meanwhile, the staggered arrangement of the present embodiment can also be seen from fig. 9, in fig. 9, taking an example of the arrangement of each row of the water-stop sheet through holes 601 on the water-stop sheet 6, the staggered arrangement between the adjacent water-stop sheet through holes 601 in each row of the water-stop sheet through holes 601, that is, a position deviation k exists between the two, and along the arrangement direction of each row of the water-stop sheet through holes 601, each water-stop sheet through hole 601 appears to be staggered alternately to both sides.

By the staggered arrangement of the rows of PTC heating blocks 12, the present embodiment can better divide the coolant in the upper and lower chambers to be able to be better heated by the PTC heating blocks 12. In addition, it should also be noted that the water outlet 5 on the upper housing 1 and the water inlet 4 on the lower housing 2 of the present embodiment, when arranged on the heater, also present a staggered arrangement as shown in fig. 1. Specifically, referring to fig. 1, the water inlet 4 and the water outlet 5 are arranged at the end of the heater, i.e. left, right, and respectively close to the two sides of the heater, and such an arrangement also enables the cooling liquid to obtain a better heating effect.

In the present embodiment, an electric box 9 is further provided in the water heating PTC heater at one side, and the electric box 9 is used for performing mounting arrangement of electric components in the heater for connection with an external circuit. And on the concrete setting, electrical apparatus box 9 also links firmly through installing support 10 with last casing 1 and lower casing 2, and simultaneously, electrical apparatus box 9 also generally via mounting screw 11 fixed to installing support 10 alright.

In addition, the water heating PTC heater in this embodiment is further provided with an inlet water temperature sensor 17 and an outlet water temperature sensor 18, which are respectively installed through the via hole structures of the temperature sensors as described above, so that the inlet water temperature sensor 17 extends into the lower water chamber through the main board 3, the upper shell 1 and the water stop plate 6, and the outlet water temperature sensor 17 extends into the upper water chamber through the main board 3 and the upper shell 1. Meanwhile, the inlet water temperature sensor 17 is also arranged close to the water inlet 4, and the outlet water temperature sensor 18 is arranged close to the water outlet 5, so that the temperature detection effect is better.

After installation, the inlet water temperature sensor 17 and the outlet water temperature sensor 18 are also connected with the circuit board 13 so as to be connected into the electrical box 9 through the circuit board 13, and thus can be connected with the control circuit part of the whole vehicle.

In the present embodiment, as a preferred embodiment, a waterproof tube 15 is also fitted around each PTC heating block 12. At this time, the waterproof tube 15 is structured as shown in fig. 8, and is specifically provided so that the waterproof tube 15 also passes through the main plate 3, the upper case 1, and the water stop sheet 6, as with the PTC heating block 12. Both ends of the waterproof tube 15 are also connected to the main board 3 and the lower case 2, specifically, one end, i.e., the bottom end, of each waterproof tube 15 is sleeved on the corresponding connecting protrusion 202 and is fixedly connected to the connecting protrusion 202. The top end of each waterproof pipe 15 is connected with a flange formed at the edge of the main board through hole 301.

As an optimal fixed connection mode, based on the setting of each riveting hole on the mainboard 3, the upper shell 1, the water-stop sheet 6 and the lower shell 2, the mainboard 3 and the upper shell 1 of the embodiment are riveted and connected through the second rivet 14, and the upper shell 1, the water-stop sheet 6 and the lower shell 2 are riveted and connected together through the first rivet 8.

In addition, it should be further noted that, in order to ensure the overall sealing performance of the heater, the upper casing 1, the lower casing 2, the main board 3, the water-stop sheet 6, the water inlet 4, the water outlet 5 and the like of the embodiment also generally adopt composite aluminum materials, and between the main board 3 and the inner wall of the waterproof pipe 15, between the main board 3 (i.e. the turned-over edge at the edge of the main board through hole 301) and the outer wall of the waterproof pipe 15, between the upper casing 1, the water-stop sheet 6 and the lower casing 2, and between the water inlet 4 and the lower casing 2, between the water outlet 5 and the upper casing 1 are respectively sealed by brazing.

Based on the above structural description, the assembling method of the water heating PTC heater of the present embodiment specifically includes the following steps when assembled.

First, the water outlet 5 is riveted to the upper case 1, the main board 3 and the upper case 1 are riveted together by the second screw 14, and then the water inlet 4 is also riveted to the lower case 2, and the riveted main board 3 and the upper case 1 are as shown in fig. 10. Then, the upper casing 1, the water-stop sheet 6 and the lower casing 2 are sequentially stacked together, and the waterproof pipes 15 are inserted through the main board 3, the upper casing 1 and the water-stop sheet 6 and are sleeved on the corresponding connecting protrusions 202. Then, the upper shell 1, the water-stop sheet 6 and the lower shell 2 are riveted and fastened through the first rivet 8, and after fastening, the upper shell 1, the water-stop sheet 6 and the lower shell 2 are moved to a brazing tool so as to be sealed through brazing between the outer surface of one end of the waterproof pipe 15 and the main board 3, between the inner surface of the other end of the waterproof pipe 15 and the connecting bulge 202, between the upper shell 1, the water-stop sheet 6 and the lower shell 2, between the water inlet 4 and the lower shell 2 and between the water outlet 5 and the upper shell 1 respectively.

The core structure of the heater constituted by brazing the sealed main plate 3, upper case 1, water-stop sheet 6, and lower case 2 is shown in fig. 11. It should be noted that, before the soldering sealing, the inlet water temperature sensor 17, the outlet water temperature sensor 18 and the mounting brackets 10 on both sides are also mounted, so as to achieve the sealing of the positions of the temperature sensors by soldering as well as to fixedly connect the mounting brackets 10 with the upper casing 1 and the lower casing 2.

It should be noted that, in the circuit board mounting post 16 for mounting the circuit board 13, it is usually riveted to the main board 3 before the main board 3 is riveted to the upper case 1. Alternatively, the main board 3 may be fixed to the main board 3 by screwing, welding, or the like after being connected to the upper case 1.

After the core structure of the heater is formed, each PTC heating block 12 is inserted into the corresponding waterproof tube 15 to install the heating assembly, as shown in fig. 12. Finally, the assembly of the integral heater is completed by mounting the sealing cover 7 on the main board 3 and mounting the electric box 9 on the mounting bracket 10.

The water heating PTC heater of the present embodiment can heat the coolant flowing therethrough by heat generation of the PTC heating blocks 12 in the heating assembly, thereby realizing a water heating manner. Meanwhile, the water inlet 4 and the water outlet 5 are respectively positioned on the lower shell 2 and the upper shell 1 at the same end, and the upper water chamber and the lower water chamber at the other end are communicated, so that the integral heater realizes a double-flow design of flowing through the cooling liquid, as shown in fig. 13.

And the coolant liquid (the temperature of water is the lowest and the highest) of the one end of the water inlet and the water outlet is heated by the same PTC heating block 12, and the temperature of water at the other end is near to be heated by the same PTC heating block 12, so that the heater of the embodiment can also better utilize each PTC heating block 12, the heating is faster, the heating efficiency of the heating assembly can be improved, and the heater has better use effect.

In addition, the heater of the embodiment can increase the volume of the cooling liquid flow channel, increase the heat exchange area, reduce the flow resistance and also reduce the overall size of the heater by directly forming the cooling liquid flow channel by the upper shell, the lower shell and the like. And through adopting riveting fixed and the sealed mode of brazing, not only can be convenient for produce manufacturing, do benefit to and reduce weight and cost, also can promote the durability, the security and the reliability of heater simultaneously.

In addition, through making the surface of waterproof pipe 15 one end and mainboard 3 sealed by brazing, the internal surface of the other end and connecting protrusion 202 sealed by brazing, this embodiment also can make waterproof pipe 15 adopt the hollow tube of both ends open-ended, can also make waterproof pipe 15 material thickness reduce from this, and then not only reduce cost, also can promote its heat transfer capacity, and further improve the heating performance of heater.

The above description is only for the purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the utility model, and any modifications, equivalents, improvements and the like that fall within the spirit and principle of the present invention are intended to be included therein.

Claims (10)

1. The utility model provides a hot-water heating PTC heater which characterized in that, hot-water heating PTC heater includes casing (1), lower casing (2), water-stop sheet (6) and heating element, wherein:

the upper shell (1) and the lower shell (2) are separated by the water-stop sheet (6), and an upper water chamber and a lower water chamber are respectively formed in the upper shell and the lower shell;

the same end of the upper water chamber and the lower water chamber is respectively provided with a water outlet (5) positioned on the upper shell (1) and a water inlet (4) positioned on the lower shell (2), and the other end of the upper water chamber is communicated with the other end of the lower water chamber relative to the end with the water outlet (5) and the water inlet (4);

the heating assembly is provided with a circuit board (13) and a plurality of PTC heating blocks (12) connected with the circuit board (13), and each PTC heating block (12) penetrates through the upper shell (1) and the water stop plate (6) to be partially positioned in the upper water chamber and partially positioned in the lower water chamber.

2. A water-heating PTC heater according to claim 1, wherein:

one end of the water-stop sheet (6) is provided with a water through hole (602);

the upper water chamber and the lower water chamber are communicated through the water through hole (602).

3. A water-heating PTC heater according to claim 1, wherein:

a plurality of the PTC heating blocks (12) are arranged in a plurality of rows;

in each row of the PTC heating blocks (12), the adjacent PTC heating blocks (12) are arranged in a staggered mode.

4. A water-heating PTC heater according to claim 1, wherein:

the water heating PTC heater also comprises an electric appliance box (9);

the electrical box (9) is fixedly connected with the upper shell (1) and the lower shell (2) through a mounting bracket (10).

5. The water heating PTC heater according to any one of claims 1 to 4, wherein:

the top of the upper shell (1) is fixedly connected with a main board (3);

the circuit board (13) is fixed on the main board (3), and the PTC heating blocks (12) are arranged through the main board (3);

and a sealing cover (7) used for sealing the circuit board (13) is arranged on the main board (3).

6. The water heating PTC heater according to claim 5, wherein:

the water heating PTC heater also comprises an inlet water temperature sensor (17) and an outlet water temperature sensor (18);

the inlet water temperature sensor (17) penetrates through the main board (3), the upper shell (1) and the water-stop sheet (6) to extend into the lower water chamber and is arranged close to the water inlet (4);

the water outlet temperature sensor (18) penetrates through the main board (3) and the upper shell (1) to extend into the upper water chamber and is arranged close to the water outlet (5).

7. The water heating PTC heater according to claim 5, wherein:

waterproof pipes (15) are sleeved outside the PTC heating blocks (12);

the waterproof pipe (15) penetrates through the main board (3), the upper shell (1) and the water-stop sheet (6) and two ends of the waterproof pipe (15) are connected with the main board (3) and the lower shell (2) respectively.

8. The water heating PTC heater according to claim 7, wherein:

a plurality of connecting bulges (202) are arranged on the inner wall of the lower shell (2), and the connecting bulges (202) are arranged in one-to-one correspondence with the waterproof pipes (15);

one end of each waterproof pipe (15) is sleeved on the corresponding connecting bulge (202) and fixedly connected with the connecting bulge (202).

9. A water-heating PTC heater according to claim 8, wherein:

the water inlet (4) and the water outlet (5) are respectively riveted on the lower shell (2) and the upper shell (1);

the main board (3) is fixedly connected with the upper shell (1) and the upper shell (1), the water-stop plate (6) and the lower shell (2) through rivets respectively.

10. The water heating PTC heater according to claim 9, wherein:

mainboard (3) with connect protruding (202) with between waterproof pipe (15), go up casing (1) water-stop sheet (6) with down between casing (2), and water inlet (4) with down between casing (2), delivery port (5) with go up between casing (1) and seal through brazing respectively.

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