CN113606776B

CN113606776B - PTC heating water tank device capable of reducing fluid resistance

Info

Publication number: CN113606776B
Application number: CN202010561119.1A
Authority: CN
Inventors: 孙奈; 崔玮康
Original assignee: Shenzhen Kewei New Technology Co ltd
Current assignee: Shenzhen Kewei New Technology Co ltd
Priority date: 2020-11-25
Filing date: 2020-11-25
Publication date: 2022-10-28
Anticipated expiration: 2040-11-25
Also published as: CN113606776A

Abstract

A PTC heating water tank device capable of reducing fluid resistance specifically relates to new energy automobile battery pack heating. The device comprises a water tank main body, a water inlet flow guide device, a water outlet flow guide device, a diversion flow guide device, a PTC heating main body, a sealing gasket and a locking fastener. According to the invention, the water inlet flow guide device, the water outlet flow guide device and the diversion flow guide device are additionally arranged in the water tank main body to form the liquid flow channel, so that on one hand, the flow resistance of fluid in the water tank can be reduced, and on the other hand, the special liquid flow channel adopts a layered layout mode, and under the condition that the geometric size or the volume of the water tank is fixed, the number of the flow channels can be increased to increase the number of the PTC heating sheets, thereby increasing the power of the heater.

Description

PTC heating water tank device capable of reducing fluid resistance

Technical Field

The invention relates to the technical field of automobile parts, in particular to a heating water tank device for a new energy automobile.

Background

The global reserves of oil resources are limited and, if continued at the present consumption levels, the global oil is not sufficient for human consumption for 50 years, while automobiles consume a significant portion of the oil production each year. On the other hand, when the automobile consumes petroleum, a large amount of toxic and harmful gas is discharged into the atmosphere, and the atmospheric environment and the life health of people are seriously affected, so that the automobile industry urgently needs to adopt renewable energy technology and clean energy technology as soon as possible.

The new energy electric automobile adopts electric drive, abandons petroleum fuel drive, and has incomparable advantages of fuel oil automobiles in the aspects of energy conservation, emission reduction and reduction of dependence of human beings on traditional fossil energy.

Most of new energy electric automobiles use lithium batteries as power sources, and the lithium batteries are electrochemical devices and have the function based on certain temperature conditions (normal working temperature is 20 ℃ below zero to 60 ℃ above zero). Under low temperature conditions, lithium batteries, whether charged/discharged, wear and tear on the electrodes, and also affect the storage capacity and service life of the battery. In order to solve the above problems, it is common practice in the electric vehicle industry to perform effective thermal management on the battery pack.

In northern areas of China, extremely cold weather at a temperature lower than 35 ℃ below zero exists every year, and when a vehicle is started or used in extremely cold weather, the battery is damaged greatly, so that the electric vehicle needs to be preheated before being started. And the long preheating time consumes the patience of the user, and the user naturally prefers to preheat more quickly and efficiently to reach the lowest working temperature as soon as possible (the working temperature of the conventional lithium battery is from minus 20 ℃ to minus 60 ℃), so that the automobile can be on the road as soon as possible. The common practice of the heaters in the market at present is to increase the flow resistance, so that the liquid stays in the heater for a certain time, and is conducted to the battery pack for heat exchange after reaching a certain temperature. We believe that under the same heater power and ambient temperature conditions, the flow resistance should be reduced instead, so that the heater delivers as much heat per unit time as possible (= Δ Q/. DELTA.t), thereby maximizing the speed at which the battery pack reaches the lowest operating temperature condition.

Disclosure of Invention

The invention mainly solves the technical problem of providing a PTC heating water tank device for reducing fluid resistance.

In order to achieve the purpose, the invention adopts the following technical scheme:

a PTC heating water tank device capable of reducing fluid resistance comprises a water tank main body 1, a water inlet flow guide device 2, a water outlet flow guide device 3, a diversion flow guide device 4, a PTC heating main body 5, a sealing gasket 6 and a locking fastener 7.

The water tank main body comprises a water tank water inlet pipe 1a, a water outlet pipe 1b, a water inlet joint 1c and a water outlet joint 1d, and a main body shell 1e.

The water inlet flow guiding device 2 comprises a water inlet flow guiding spoke 2a, a flow channel 2b formed by the water inlet flow guiding spoke and the water tank and a flow channel 2c formed by the flow guiding spoke.

The water outlet flow guiding device 3 comprises a water outlet flow guiding spoke 3a, a flow channel 3b formed by the water outlet flow guiding spoke and the water tank, and a flow channel 3c formed by the flow guiding spoke.

The direction-changing flow guide device 4 comprises a direction-changing flow guide spoke 4f, a flow channel inner side flow channel 4a, a 4 b-time inner side flow channel, a 4c middle flow channel, a 4 d-time outer side flow channel and a 4e outer side flow channel formed by the direction-changing flow guide spoke and the water tank main body shell. Wherein, we define the inside near the inside of the sink body as the inside.

The PTC heating main body 5 comprises PTC heating main body guide spokes 5a, a sealing gasket clamping groove 5b, a PTC heating sheet clamping groove 5c and a PTC heating cover plate 5d.

Preferably, the water inlet 1a and the water outlet 1b are both streamline cavity wall features, and are formed by convex

arc sections

11a and 11b and

concave arc sections

12a and 12b (see fig. 3), and this design can avoid generating vortex at this place, thereby reducing flow resistance, and making the fluid flow into the sink body from the water inlet and flow out of the sink body from the water outlet more smoothly.

Preferably, the

inlet guide spokes

2a, 2b and the

outlet guide spokes

3a, 3b each have an

edge feature

21, 31 that is thin at the front and thick at the back (see fig. 4 and 5). When passing through the knife edge, fluid can smoothly flow through the rear section of the knife edge from the front end of the knife edge, so that the contact area of the fluid and the front surface of the guide spoke is effectively reduced, and the flow resistance is reduced.

Preferably, the water

inlet guide spokes

2a, 2b and the water

outlet guide spokes

3a, 3b are designed into a front-rear layered structure (see fig. 6); the structure forms a layered runner with controllable sectional area of the opening part, and is characterized in that the quantity of runners close to the water inlet and the water outlet is small, and the quantity of runners far away from the water inlet and the water outlet is increased.

Preferably, the convex arc section 11a of the water inlet and the knife-edge arc 21a of the water inlet guide spokes form a special non-acute angle feature 22 (see fig. 7), which can reduce the deposition and accumulation of foreign matters (such as filaments or fibers) and impurities in the fluid at the inlet and avoid the formation of small turbulence or vortex in the narrowest region of the flow passage, thereby reducing the flow resistance.

Preferably, the diversion guide spokes 4f, the water

inlet guide spokes

2a and 2b and the water

outlet guide spokes

3a and 3b form a special butt joint structure (see fig. 8), and the structure has directional directivity, namely front-female-rear-male along the water flow direction. Compared with other structures, the front, female and rear male structures can reduce the contact area between the fluid and the gap at the butt joint; even if a gap appears at the butt joint structure of the male and female parts along with the lapse of service time, the structure can reduce the contact area of the fluid and the butt joint gap as much as possible, and reduce the generation of vortex, thereby reducing the fluid resistance.

Preferably, the diversion and flow guide device is provided with fluid diversion and flow guide spokes to form a 4a inner flow passage, a 4 b-time inner flow passage, a 4c middle flow passage and a 4 d-time outer flow passage, and a 4e outer flow passage is formed by the diversion and flow guide device and the water tank main body shell. The flow resistance of the water tank is larger closer to the inner side of the water tank body, the flow channel is required to be designed to be wider, and the cross-sectional area relationship among the flow channels is 4a >4b >4c >4d >4e (see fig. 9). Wherein we define the inside near the inside of the sink body as the inside. The flow channel design can avoid the vortex phenomenon generated by the fluid at the inner side or the secondary inner side to the maximum extent and reduce the flow resistance.

Preferably, the PTC heating body 51 is fitted with water

inlet guide spokes

2a, 2b and water

outlet guide spokes

3a, 3b, and also has a layered structure, and the heating sheets are staggered back and forth (see fig. 10). The layered structure can increase the number of the heating sheets as much as possible under the condition that the volume of the heater is fixed so as to increase the power of the heater.

The invention has small device volume and can be matched with different types of electric automobiles; streamline cavity wall characteristics, guide spokes and knife edge designs on the spokes can reduce fluid resistance and improve heat exchange efficiency; the male and female butt joint structure and the non-acute angle characteristic can improve the heat conduction performance of the water tank and the service life of the water tank; the heating sheets are arranged in a staggered manner from front to back, so that the power of the heater can be increased under the condition of small volume.

Drawings

FIG. 1: explosion diagram of PTC heating water tank structure

1: the water tank main body 2: water inlet guide spokes 3: water outlet diversion spoke

4: turning guide spokes 5: PTC heating main body 6: sealing gasket

7: locking fastener

FIG. 2: detail view of water tank body

1a: water inlet pipe 1b: water outlet pipe 1c: water inlet joint

1d: water outlet joint 1e: water tank main body shell

FIG. 3: detailed drawing of water inlet and outlet chamber wall features

11a convex arc feature of water inlet 11b concave arc feature of water inlet

12a, water outlet convex arc characteristic 12b: concave arc feature of water outlet

FIG. 4: detail drawing of water inlet guide spoke knife edge characteristics

21 Water inlet guide spoke knife edge

FIG. 5: detail drawing of water outlet diversion spoke knife edge characteristics

31 Water outlet flow guide spoke knife edge

FIG. 6 is a detailed view of the inlet and outlet diversion devices

2a: water inlet guide spokes 2b: flow passage formed by water inlet diversion spoke and water groove

2c: flow channel 3a formed by guide spokes: water outlet diversion spoke

3b: flow passage formed by water outlet diversion spoke and water tank

FIG. 7: detail view of non-acute features

11a: water inlet convex arc feature 21a: water inlet guide spoke knife edge arc shape characteristic

FIG. 8: detail drawing of male-female butt joint structure

a: male pair of interfaces b: female butt joint

FIG. 9: detail drawing of direction-changing flow-guiding device

1e: water tank main body case 4a: inner flow passage 4b: secondary inner runner

4c: middle flow passage 4d: secondary outer flow path 4e: outer runner

4f: diversion guide spoke

FIG. 10: detailed view of PTC heating body

5a: PTC heating main body guide spokes 5b: seal gasket draw-in groove

5c: PTC heating sheet clamping groove 5d: PTC heating cover plate

FIG. 11: fixing mode of flow guide device and water tank main body

1: the water tank main body 2: water inlet deflector 3: water outlet flow guiding device

4: diversion flow guide device

FIG. 12: example 1

1a: water inlet pipe 1b: a water outlet pipe 2: water inlet flow guiding device

3: water outlet flow guiding device 4: direction-changing flow guiding device

FIG. 13: example 2

61: water inlet pipe 62: water outlet pipe 63: water inlet flow guiding device

64: water outlet flow guiding device

FIG. 14 practical example 3

71: water inlet pipe 72: water outlet pipe 73: water inlet flow guiding device

74: water outlet flow guide device 75: diversion flow guide device

Detailed Description

Embodiments of the present invention will be further described with reference to the accompanying drawings.

As shown in fig. 1, a PTC water heating tank device for reducing fluid resistance includes a tank body 1, a water inlet flow guide device 2, a water outlet flow guide device 3, a diversion flow guide device 4, a PTC heating body 5, a sealing gasket 6 and a locking fastener 7.

The sink body 1 as shown in fig. 2 can be formed by a one-time mold or machined, and the water inlet pipe and the water outlet pipe can be connected and assembled with the sink body housing by welding or locking screws.

The water inlet flow guide device 2, the water outlet flow guide device 3 and the diversion flow guide device 4 are made of materials such as an aluminum casting, a plastic part, a stainless steel part, copper, ceramics and the like which are formed at one time. The bottoms of the two bodies are provided with bases which are fixedly arranged with the water tank body 1 in a buckle locking way (as shown in figure 11)

The PTC heating main body 5 is integrally formed or manufactured in a machining and assembling mode, and installation positions of a heating sheet and a sealing gasket are reserved.

When the water tank device is installed, the sealing gasket 6 is firstly arranged in the PTC heating main body 5, then the PTC heating main body 5 is pressed downwards, and the PTC heating main body and the water tank main body are attached together in a buckling or clamping manner to form the sealed water tank device.

Example 1:

as shown in fig. 12, the water inlet and the water outlet are located on the same side of the water tank body, the water inlet joint 1c is connected to the water pipe at the water pump end of the automobile, and the water outlet joint 1d is connected to the water pipe at the battery pack end. The water inlet flow guiding device 2 is connected with the front end of a PTC heating main body flow guiding spoke, and the rear end of the PTC heating main body flow guiding spoke is connected with the front end of a diversion flow guiding device 4; the rear end of the diversion flow guide device 4 is connected with the water outlet flow guide device 3. This design allows for 180 degree turning of the liquid.

Example 2:

as shown in fig. 13, a water inlet joint 61 and a water outlet joint 62 are respectively arranged on the opposite sides of the water tank body, the water inlet joint 61 is connected with a water pipe at the water pump end of the automobile, and the water outlet joint 62 is connected with a water pipe at the battery pack end. The water inlet flow guiding device 63 and the water outlet flow guiding device 64 are directly connected with the heating main body flow guiding device, and liquid directly flows out of the water outlet after flowing through the heating main body flow guiding device from the water inlet without a direction-changing flow guiding device.

Example 3:

as shown in fig. 14, the water inlet and outlet are distributed on the water tank body at 90 degrees, the water inlet joint 71 is connected with the water pipe at the water pump end of the automobile, and the water outlet joint 72 is connected with the water pipe at the battery pack end. The water inlet flow guiding device 73 is connected with the front end of a flow guiding spoke of the PTC heating main body, and the rear end of the flow guiding spoke of the PTC heating main body is connected with the front end of the outlet diversion flow guiding device 75; the rear end of the diversion flow guide device 75 is connected with a water outlet flow guide 74 device. The structural design can realize 90-degree direction change.

It should be noted that the above-mentioned embodiments and examples are only preferred embodiments of the present invention and the technical principles used, and any changes or substitutions which can be easily made by those skilled in the art within the technical scope of the present invention disclosed by the present invention should be covered within the protective scope of the present invention.

Claims

1. A PTC heating water tank device for reducing fluid resistance is characterized in that: the water tank comprises a water tank main body, a water inlet flow guide device, an outlet flow guide device, a diversion flow guide device, a PTC heating main body, a sealing gasket and a locking firmware; the water tank main body is internally provided with a water inlet flow guide device, a water outlet flow guide device, a diversion flow guide device and a PTC heating main body which form a plurality of layered flow channels; the water inlet guide device and the water outlet guide device both comprise guide spokes and a flow channel consisting of the guide spokes, the water inlet guide spokes and the water outlet guide spokes both have arc-shaped knife edge characteristics, and the knife edge characteristics are thin in the front and thick in the back; the diversion spokes of the diversion flow guide device form a diversion flow channel, the cross section area of the flow channel at the middle position of the sink main body is larger, the outer side is smaller than the secondary outer side, the secondary outer side is smaller than the middle part, the middle part is smaller than the secondary inner side, the secondary inner side is smaller than the inner side, and the like; wherein, the position close to the middle of the water tank main body is defined as the inner side; the heating sheets on the PTC heating main body are staggered and layered in front and back.

2. A PTC water heating tank device with reduced fluid resistance as defined in claim 1, wherein: the water tank main body is provided with a water inlet, a water outlet and a water tank main body shell, the water inlet and the water outlet are both of streamline cavity wall characteristics, and a streamline is formed by smoothly connecting a concave arc section and a convex arc section.

3. A PTC water heating tank device with reduced fluid resistance as defined in claim 1, wherein: the water inlet flow guiding device and the water outlet flow guiding device both comprise flow guiding spokes and flow channels formed by the flow guiding spokes, the water inlet flow guiding spokes and the water outlet flow guiding spokes have the characteristic of front-back layering, and the flow channels formed by the front-back layering are characterized in that the flow channels close to the water inlet and the water outlet are small in quantity, and the flow channels far away from the water inlet and the water outlet are increased in quantity.

4. A PTC water heating tank device with reduced fluid resistance according to claim 2 or 3, wherein: the convex arc section of the water inlet is tangent to the lower edge of the arc-shaped knife edge of the water inlet diversion spoke to form a non-acute angle characteristic.

5. A PTC water heating tank device with reduced fluid resistance as defined in claim 1, wherein: the diversion guide device guide spokes, the water inlet guide spokes and the water outlet guide spokes are in butt joint with each other in the front-female-rear-male mode along the fluid flowing direction.