CN216331319U

CN216331319U - Heating device

Info

Publication number: CN216331319U
Application number: CN202122651045.3U
Authority: CN
Inventors: 殷绍哲; 宋帅; 龚明
Original assignee: Mind Electronics Appliance Co Ltd
Current assignee: Mind Electronics Appliance Co Ltd
Priority date: 2021-11-01
Filing date: 2021-11-01
Publication date: 2022-04-19
Anticipated expiration: 2031-11-01

Abstract

The present invention provides a heater comprising: a housing; the heat dissipation device is arranged in the shell, and a heat dissipation flow channel is defined in the heat dissipation device; the heating core is arranged in the shell and exchanges heat with the heat dissipation device; the liquid inlet pipe is arranged on the heat dissipation device and communicated with the heat dissipation flow channel, and is provided with a first temperature detection piece used for detecting the temperature of a refrigerant in the liquid inlet pipe; the liquid outlet pipe is arranged on the heat dissipation device and communicated with the heat dissipation flow channel, and is provided with a second temperature detection piece used for detecting the temperature of the refrigerant in the liquid outlet pipe. From this, through set up first temperature detection spare at the feed liquor pipe to set up second temperature detection spare at the drain pipe, can accurate, the refrigerant temperature in quick detection feed liquor pipe, the drain pipe, thereby can improve the temperature control precision to the heater, can sensitively adjust the heating power of heater, improve vehicle air conditioner's use travelling comfort and the security of battery thermal management.

Description

Heating device

Technical Field

The utility model relates to the technical field of vehicles, in particular to a heater.

Background

In the related art, a heater is applied to a vehicle, the heating power of the heater is related to the working temperature of the heater, and the temperature change of the heater cannot be rapidly acquired due to the structural design defect, so that the heater cannot be rapidly adjusted to output appropriate heating power, and the use comfort of a vehicle air conditioner and the safety of battery thermal management are poor.

SUMMERY OF THE UTILITY MODEL

In view of this, the present invention is directed to provide a heater, which can accurately detect the temperature of the refrigerant in the liquid inlet pipe and the liquid outlet pipe, so as to improve the temperature control precision of the heater, accurately control the working temperature of the heater, enable the heater to have higher heating power, and improve the use reliability of the heater.

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

a heater, comprising: a housing; the heat dissipation device is arranged in the shell, and a heat dissipation flow channel is defined in the heat dissipation device; the heating core is arranged in the shell and exchanges heat with the heat dissipation device; the liquid inlet pipe is arranged on the heat dissipation device and communicated with the heat dissipation flow channel, and is provided with a first temperature detection piece used for detecting the temperature of a refrigerant in the liquid inlet pipe; the liquid outlet pipe is installed on the heat dissipation device and communicated with the heat dissipation flow channel, and is provided with a second temperature detection piece used for detecting the temperature of the refrigerant in the liquid outlet pipe.

In some examples of the present invention, a side wall of the liquid inlet pipe is provided with the first temperature detection member, and the liquid inlet pipe has a diameter R₁The first temperature detection piece extends into the liquid inlet pipe for a length H₁And satisfies the relation: 0.5R₁≤H₁。

In some examples of the utility modelThe side wall of the liquid outlet pipe is provided with the second temperature detection piece, and the diameter of the liquid outlet pipe is R₂The length of the second temperature detection piece extending into the liquid outlet pipe is H₂And satisfies the relation: 0.5R₂≤H₂。

In some examples of the utility model, the housing comprises: first casing and second casing, first casing with the second casing prescribes a limit to the installation cavity jointly, just first casing with the second casing prescribes a limit to jointly with the first through-hole and the second through-hole of installation cavity intercommunication, heat abstractor with the heating core all install in the installation cavity, the feed liquor pipe passes first through-hole, the drain pipe passes the second through-hole.

In some examples of the utility model, the heater further comprises: the circuit board and the heater switch, first installation space is injectd to the second casing, the circuit board with the heater switch all install in the first installation space, the circuit board with the heating core the heater switch all is connected, the second casing is equipped with mounting structure, the heater switch through have the fastener of heat conduction effect install in mounting structure.

In some examples of the utility model, a reinforcing rib having a heat conduction function is connected between the mounting structure and the second housing; and a heat conducting sheet is clamped between the heater switch and the second shell.

In some examples of the utility model, the first housing is a plastic part and the second housing is a metal part.

In some examples of the present invention, the heat dissipation device includes a plurality of heat dissipation bodies, each of the heat dissipation bodies defines a heat dissipation channel, the plurality of heat dissipation bodies are sequentially stacked, a second installation space is formed between two adjacent heat dissipation bodies, the heating core is installed in the second installation space and exchanges heat with the heat dissipation bodies, and the heat dissipation channels of two adjacent heat dissipation bodies are communicated; the heat dissipation flow channel is provided with a first inner surface and a second inner surface which are opposite, the first inner surface is provided with a first protruding structure, the second inner surface is provided with a second protruding structure, and the first protruding structure and the second protruding structure are opposite and stop.

In some examples of the present invention, each of the first protruding structures and the second protruding structures is provided in a plurality, and the plurality of first protruding structures and the plurality of second protruding structures correspond to one another; at least one of the first projection structure and the second projection structure is configured as a post-type structure.

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

according to the heater, the first temperature detection part is arranged on the liquid inlet pipe, and the second temperature detection part is arranged on the liquid outlet pipe, so that the temperature of the refrigerant in the liquid inlet pipe and the refrigerant in the liquid outlet pipe can be accurately and quickly detected, the temperature control precision of the heater can be improved, the working temperature of the heater can be flexibly adjusted, and the use comfort of a vehicle air conditioner and the safety of battery heat management are 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 an exploded view of a heater according to an embodiment of the present invention;

FIG. 2 is an exploded view of another angle of a heater according to an embodiment of the present invention;

FIG. 3 is a schematic view of a portion of a heater according to an embodiment of the present invention;

FIG. 4 is a schematic view of a second housing according to an embodiment of the present invention;

FIG. 5 is a cross-sectional view of a portion of the structure of the circuit board, heater switch and second housing after assembly in accordance with an embodiment of the present invention;

fig. 6 is a schematic view of a heat dissipation device according to an embodiment of the utility model;

FIG. 7 is a cross-sectional view taken at A-A in FIG. 6;

FIG. 8 is a cross-sectional view taken at B-B of FIG. 6;

FIG. 9 is a cross-sectional view taken at C-C of FIG. 6;

FIG. 10 is an enlarged schematic view at D of FIG. 9;

fig. 11 is a schematic partial structural view of a heat dissipation body according to an embodiment of the utility model;

fig. 12 is a partial structural view of another embodiment of a heat dissipation body according to an embodiment of the utility model;

fig. 13 is a schematic view of a heat dissipation body according to an embodiment of the utility model.

Description of reference numerals:

a heater 100;

a housing 10; a cushion 11; a first housing 12; a first through-hole 121; a second housing 13; a second through hole 131; a first installation space 132; a circuit board 133; a heater switch 134; a mounting structure 135; a weight-reducing slot 1351; a fastener 136; screw holes 137; a reinforcing rib 138; a heat conductive sheet 139;

a mounting cavity 14; an end cap 15;

a heat sink 20; a heat dissipating body 21; a liquid inlet hole 211; a connection hole 212; the second installation space 22; a heat dissipation flow passage 23; a first inner surface 231; first protrusion structure 2311; a second inner surface 232; second projecting structure 2321;

a heating core 40; a liquid inlet pipe 41; the first temperature detection member 42; a temperature detection member case 421; a temperature detection piece chip 422; a liquid outlet pipe 43; a second temperature detection member 44; and a seal ring 45.

Detailed Description

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

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

As shown in fig. 1 to 3, a heater 100 according to an embodiment of the present invention includes: the shell 10, the heat sink 20, the heating core 40, the liquid inlet pipe 41 and the liquid outlet pipe 43.

The heat dissipation device 20 is arranged in the housing 10, the heat dissipation flow channel 23 is defined in the heat dissipation device 20, the heating core 40 is arranged in the housing 10, the heating core 40 can exchange heat with the heat dissipation device 20, the liquid inlet pipe 41 is arranged in the heat dissipation device 20, the liquid inlet pipe 41 is communicated with the heat dissipation flow channel 23, a refrigerant flows in the liquid inlet pipe 41, the liquid inlet pipe 41 is provided with the first temperature detection piece 42, and the first temperature detection piece 42 can detect the temperature of the refrigerant in the liquid inlet pipe 41. The liquid outlet pipe 43 is mounted on the heat sink 20, the liquid outlet pipe 43 is communicated with the heat dissipation flow channel 23, a refrigerant flows through the liquid outlet pipe 43, the liquid outlet pipe 43 is provided with a second temperature detection member 44, and the second temperature detection member 44 can detect the temperature of the refrigerant in the liquid outlet pipe 43.

The refrigerant may enter the heat dissipation device 20 through the liquid inlet pipe 41, and the refrigerant entering the heat dissipation device 20 may exchange heat with the heat dissipation device 20 to reduce the temperature of the heat dissipation device 20, so that the heater 100 is within an appropriate working temperature range.

Alternatively, as shown in fig. 1 and 2, the shock absorbing pad 11 may be sleeved outside the heat sink 20, the cross section of the shock absorbing pad 11 may be configured to be a U-like structure, and the shock absorbing pad 11 may be disposed between the heat sink 20 and the housing 10, in other words, one side of the shock absorbing pad 11 may be in abutting contact with the heat sink 20, and the other side of the shock absorbing pad 11 may be in abutting contact with the inner wall of the housing 10. Preferably, the shock absorbing pad 11 and the housing 10 may be in an interference fit. Through setting up shock pad 11, can avoid heat abstractor 20 and shell 10 to take place hard contact to can avoid heat abstractor 20 to damage, and, can also fix heat abstractor 20 in shell 10, can avoid heat abstractor 20 to take place to rock in shell 10.

Alternatively, the material of the shock pad 11 may be rubber, the hardness of the shock pad 11 may be any hardness between shore hardness 30 and shore hardness 50, and by configuring the hardness of the shock pad 11 to be any hardness between shore hardness 30 and shore hardness 50, the shock pad 11 may provide a certain pressing force, so that the heat sink 20 may be firmly fixed in the housing 10, and the assembly difficulty of the heater 100 may also be reduced.

Alternatively, as shown in fig. 8, the first temperature detection member 42 and/or the second temperature detection member 44 may include a temperature detection member housing 421 and a temperature detection member chip 422. For example, the first temperature detection member 42 may include a temperature detection member housing 421 and a temperature detection member chip 422, or the second temperature detection member 44 may include a temperature detection member housing 421 and a temperature detection member chip 422, or both the first temperature detection member 42 and the second temperature detection member 44 may include a temperature detection member housing 421 and a temperature detection member chip 422. Preferably, the first temperature detection element 42 and the second temperature detection element 44 each include a temperature detection element housing 421 and a temperature detection element chip 422, and the temperature detection element chip 422 may be disposed in the temperature detection element housing 421, so as to protect the temperature detection element chip 422 and prevent the temperature detection element chip 422 from being damaged.

In the prior art, the heating power of a heater is related to the working temperature of the heater, and the temperature change of the heater cannot be rapidly acquired due to the structural design defect, so that the heater cannot be rapidly adjusted to output appropriate heating power, and the use comfort of a vehicle air conditioner and the safety of battery thermal management are poor.

And in this application, through setting up first temperature detection piece 42, the coolant temperature in the detection feed liquor pipe 41 that can be accurate, and, through setting up second temperature detection piece 44, the coolant temperature in the detection feed liquor pipe 43 that can be accurate, can be according to feed liquor pipe 41, the coolant temperature in the drain pipe 43 controls heater 100 power, thereby can improve the temperature control precision to heater 100, can the sensitive heating power who adjusts heater 100, be favorable to improving vehicle air conditioner's use travelling comfort and the security of battery thermal management.

From this, through set up first temperature detection piece 42 at feed liquor pipe 41 to set up second temperature detection piece 44 at drain pipe 43, can be accurate, the refrigerant temperature in quick detection feed liquor pipe 41, the drain pipe 43, thereby can improve the temperature control precision to heater 100, can sensitively adjust the heating power of heater 100, can make heater 100 have higher heating power, can improve the heating comfort of heater 100, improve vehicle air conditioner's use travelling comfort and battery thermal management's security.

In some embodiments of the present invention, as shown in fig. 1 and 2, a sidewall of the liquid inlet pipe 41 may be provided with the first temperature detection member 42, and the diameter of the liquid inlet pipe 41 may be R₁The length of the first temperature detecting member 42 extending into the liquid inlet pipe 41 may be H₁，H₁And R₁The relation can be satisfied: 0.5R₁≤H₁。

Optionally, a temperature detection piece mounting hole may be opened in the side wall of the liquid inlet pipe 41, the first temperature detection piece 42 may be inserted into the temperature detection piece mounting hole, at least a part of the structure of the first temperature detection piece 42 may extend into the liquid inlet pipe 41 through the temperature detection piece mounting hole, and the length of the first temperature detection piece 42 extending into the liquid inlet pipe 41 may be greater than or equal to 0.5 times the diameter of the liquid inlet pipe 41. Preferably, the length of the first temperature detection member 42 extending into the liquid inlet pipe 41 is equal to 0.5 times the diameter of the liquid inlet pipe 41.

The arrangement enables the first temperature detection part 42 to be in direct contact with the refrigerant in the liquid inlet pipe 41, so that the temperature of the refrigerant in the liquid inlet pipe 41 can be accurately detected by the first temperature detection part 42, the detection accuracy of the first temperature detection part 42 can be improved, and when the temperature of the refrigerant in the liquid inlet pipe 41 changes, the first temperature detection part 42 can rapidly detect the change of the temperature of the refrigerant, so that the sensitivity of the first temperature detection part 42 is high.

In some embodiments of the present invention, as shown in fig. 1 and 2, the sidewall of the liquid outlet pipe 43 may be provided with a second temperature detecting member 44, and the diameter of the liquid outlet pipe 43 may be R₂The length of the second temperature detecting member 44 extending into the liquid outlet pipe 43 may be H₂，H₂And R₂The relation can be satisfied: 0.5R₂≤H₂。

Optionally, a temperature detection piece mounting hole may be opened in the side wall of the liquid outlet pipe 43, the second temperature detection piece 44 may be inserted in the temperature detection piece mounting hole, at least a part of the structure of the second temperature detection piece 44 may extend into the liquid outlet pipe 43 through the temperature detection piece mounting hole, and the length of the second temperature detection piece 44 extending into the liquid outlet pipe 43 may be greater than or equal to 0.5 times the diameter of the liquid outlet pipe 43, preferably, the length of the second temperature detection piece 44 extending into the liquid outlet pipe 43 is equal to 0.5 times the diameter of the liquid outlet pipe 43.

Set up like this and to make second temperature detect 44 can direct contact to the refrigerant in the drain pipe 43 to can guarantee that second temperature detect 44 can be accurate detect out the refrigerant temperature in the liquid pipe 43, can improve the detection accuracy of second temperature detect 44, and, when the refrigerant temperature in the drain pipe 43 changes, the change that second temperature detect 44 can be quick detects the refrigerant temperature, can make the sensitivity of second temperature detect 44 higher.

Optionally, the first temperature detection element 42 and the second temperature detection element 44 each include a temperature detection element housing 421 and a temperature detection element chip 422, and the temperature detection element housing 421 may be made of an aluminum alloy. It can be understood that the heat conductivity coefficient of the aluminum alloy is high, and the first temperature detection member 42 and the second temperature detection member 44 can detect the change of the temperature of the refrigerant more rapidly by constructing the material of the temperature detection member housing 421 as the aluminum alloy, so that the sensitivity of the first temperature detection member 42 and the second temperature detection member 44 can be improved.

In some embodiments of the present invention, both the first Temperature detecting member 42 and the second Temperature detecting member 44 may be configured as an NTC Temperature Sensor (Negative Temperature Coefficient Sensor). It is understood that NTC refers to a thermistor phenomenon and material having a negative temperature coefficient, in which resistance decreases exponentially with temperature rise. The material can be semiconductor ceramic formed by fully mixing, molding, sintering and other processes of two or more than two metal oxides of manganese, copper, silicon, cobalt, iron, nickel, zinc and the like, and can be made into a thermistor with a negative temperature coefficient. By configuring each of the first and second

temperature detecting members

42 and 44 as an NTC temperature sensor, the first and second

temperature detecting members

42 and 44 can accurately detect the temperature of the refrigerant, and the reliability of the first and second

temperature detecting members

42 and 44 can be ensured.

By using the first temperature detecting part 42 and the second temperature detecting part 44, the change of the temperature of the refrigerant can be detected within 2s to 5s, which is beneficial to accurately controlling the working temperature of the heater 100 and improving the heating power of the heater 100.

In some embodiments of the present invention, as shown in fig. 1-4, the housing 10 may include: the heat dissipation device comprises a first shell 12 and a second shell 13, wherein the first shell 12 and the second shell 13 can jointly define a mounting cavity 14, a heat dissipation device 20 can be mounted in the mounting cavity 14, and a heating core 40 can also be mounted in the mounting cavity 14. And, the first casing 12 and the second casing 13 may jointly define a first through hole 121 and a second through hole 131, the first through hole 121 and the second through hole 131 are both communicated with the installation cavity 14, the liquid inlet pipe 41 may be disposed through the first through hole 121, and the liquid outlet pipe 43 may be disposed through the second through hole 131. So set up and to make feed liquor pipe 41, drain pipe 43 stretch out installation cavity 14 to can be convenient for set up with feed liquor pipe 41, drain pipe 43 and other structure intercommunications.

Optionally, as shown in fig. 1, the outer side of the liquid inlet pipe 41 and/or the liquid outlet pipe 43 may be sleeved with a sealing ring 45, for example, the outer side of the liquid inlet pipe 41 may be sleeved with a sealing ring 45, or the outer side of the liquid outlet pipe 43 may be sleeved with a sealing ring 45, or the outer sides of the liquid inlet pipe 41 and the liquid outlet pipe 43 may be both sleeved with a sealing ring 45. Preferably, the outer sides of the liquid inlet pipe 41 and the liquid outlet pipe 43 are both sleeved with a sealing ring 45. The sealing ring 45 sleeved outside the liquid inlet pipe 41 can be in interference fit with the first through hole 121, and the sealing ring 45 sleeved outside the liquid outlet pipe 43 can be in interference fit with the second through hole 131. Set up like this and to realize the sealed of feed liquor pipe 41 and first through-hole 121, can realize drain pipe 43 and the sealed of second through-hole 131 to, can guarantee the installation stability of feed liquor pipe 41 and drain pipe 43, can avoid feed liquor pipe 41 and drain pipe 43 to take place to rock.

Alternatively, the material of the sealing ring 45 may be rubber, the hardness of the sealing ring 45 may be any hardness between 30 shore hardness and 50 shore hardness, and by configuring the hardness of the sealing ring 45 to be any hardness between 30 shore hardness and 50 shore hardness, the sealing ring 45 may provide a certain pressing force, which may further reduce the assembly difficulty of the heater 100.

In some embodiments of the present invention, as shown in fig. 1-3 and 5, the heater 100 may further include: a circuit board 133 and a heater switch 134, wherein the second housing 13 may define the first mounting space 132, the circuit board 133 may be mounted in the first mounting space 132, the heater switch 134 may be mounted in the first mounting space 132, the circuit board 133 may be disposed electrically connected to the heater core 40, and the circuit board 133 may also be disposed electrically connected to the heater switch 134. The second housing 13 may be provided with a mounting structure 135, and the heater switch 134 may be mounted to the mounting structure 135 by a fastener 136, and the fastener 136 may be configured as a thermally conductive fastener 136.

Alternatively, the heater switch 134 may be fixed to the circuit board 133 by soldering to electrically connect the heater switch 134 and the circuit board 133, and the heater switch 134 may be used to connect or disconnect the power supply circuit of the heater core 40. By installing the circuit board 133 and the heater switch 134 in the first installation space 132, the volume of the heater 100 can be reduced, the space required for the heater 100 can be reduced, and thus the installation of the heater 100 on the vehicle can be facilitated.

Alternatively, as shown in fig. 1, 3 and 4, the fastener 136 may be configured as a screw, the mounting structure 135 may be provided with a screw hole 137, and the heater switch 134 may be securely mounted to the mounting structure 135 by configuring the fastener 136 as a screw and providing the mounting structure 135 with the screw hole 137. In addition, the screw has a heat conduction function, so that heat generated when the heater switch 134 works can be quickly led out, the heater switch 134 can be prevented from being damaged due to overheating, and the service life of the heater switch 134 can be prolonged.

Alternatively, the screw may be an M3 screw, and the torque of the screw is between 1.2N M and 5N M.

As some embodiments of the present invention, as shown in fig. 1, 2 and 5, the heater 100 may further include: the end cap 15, the end cap 15 may be disposed in connection with the second housing 13, the end cap 15 may be disposed at an end of the second housing 13 away from the first housing 12, and the end cap 15 may provide protection for the circuit board 133 and the heater switch 134 to prevent the circuit board 133 and the heater 100 from being damaged.

In some embodiments of the present invention, as shown in fig. 4, a reinforcing rib 138 having a heat conductive function may be connected between the mounting structure 135 and the second housing 13, and, as shown in fig. 1, 2, and 5, a heat conductive sheet 139 may be interposed between the heater switch 134 and the second housing 13.

It should be noted that, the heater switch 134 has a certain resistance, and when the heater 100 operates, a large current (about 17A or so) passes through the heater switch 134, so the heater switch 134 has a heating power of about 18W, and if the heat generated by the heater switch 134 is not conducted out in time, the heater switch 134 may continuously increase the temperature to be excessively high, which may cause the heater switch 134 to be short-circuited seriously, and may cause the heater switch 134 to fail to cut off the power supply circuit of the heating core 40.

Through the heat conduction sheet 139 that is arranged between the heater switch 134 and the second housing 13, and the reinforcing rib 138 that is connected between the mounting structure 135 and the second housing 13, the heat generated during the operation of the heater switch 134 can be quickly led out, the temperature of the heater switch 134 can be prevented from being too high, and the operational reliability of the heater switch 134 can be ensured. Moreover, through setting up strengthening rib 138, can improve mounting structure 135's intensity, can avoid mounting structure 135 fracture, in addition, strengthening rib 138 can also improve the heat radiating area of second casing 13, is favorable to the quick heat dissipation of second casing 13.

Alternatively, the heater switch 134 may be configured as an IGBT (Insulated Gate Bipolar Transistor). The thermally conductive sheet 139 may be configured as a silicone gasket, and preferably, a silicone gasket having a thermal conductivity of more than 2W/(m · K) and a hardness of not more than 50 degrees shore hardness may be used. It can be appreciated that the silicone gasket is an insulating silicone gasket that can prevent the heater switch 134 and the mounting structure 135 from conducting electricity, which can avoid safety accidents.

Alternatively, the mounting structure 135 and the second housing 13 may be integrally formed, that is, the mounting structure 135 and the second housing 13 are configured as an integrally formed piece, which has good structural strength, so that the connection reliability of the mounting structure 135 and the second housing 13 can be improved, and the mounting structure 135 and the second housing 13 can be prevented from being separated. In addition, the heater 100 can be made compact, which is advantageous for reducing the volume of the heater 100.

It should be noted that the heater switch 134 can be firmly mounted on the mounting structure 135 by engaging the fastener 136 with the screw hole 137 of the mounting structure 135 and interposing the heat conductive sheet 139 between the heater switch 134 and the second housing 13, and the mounting process is simple. Moreover, the close fit between the heater switch 134 and the heat-conducting fin 139 can be ensured, so that the heater switch 134 is not required to be fixed by using additional parts, and the development and production costs of the additional parts are reduced.

As some embodiments of the present invention, as shown in fig. 4, a plurality of mounting structures 135 may be provided with weight-reducing slots 1351 therebetween, which is advantageous in saving materials, reducing manufacturing costs of the heater 100, and reducing the weight of the heater 100, which is advantageous in increasing the driving range of the vehicle.

In some embodiments of the present invention, the first housing 12 may be configured as a plastic member, and the second housing 13 may be configured as a metal member. Optionally, the first housing 12 may be made of modified materials such as nylon and glass fiber, which may reduce the thermal conductivity of the first housing 12, and may enable the first housing 12 to perform a certain thermal insulation function, so that when the electric heater 100 operates under a working condition with a lower ambient temperature, the heat loss may be reduced.

Alternatively, the second housing 13 may be cast using an aluminum material, for example, the second housing 13 may be cast using ADC12 (aluminum material No. 12), and the ADC12 is a die-cast aluminum alloy, so that since the circuit board 133 is mounted in the first mounting space 132 defined by the second housing 13, a good electromagnetic shielding effect can be achieved by constructing the material of the second housing 13 as an aluminum material.

It should be noted that the heater 100 of the present application has fewer parts, only involves a simple installation step during assembly, and does not require a press or a pressing mechanism for assembly, which can reduce the production cost of the heater 100.

As shown in fig. 6 to 13, the heat sink 20 of the heater 100 according to the embodiment of the present invention includes: a plurality of heat dissipation bodies 21, wherein, in the front-back direction shown in fig. 7, the plurality of heat dissipation bodies 21 are stacked in sequence, a second installation space 22 is formed between two adjacent heat dissipation bodies 21, each heat dissipation body 21 defines a heat dissipation flow channel 23, and the heat dissipation flow channels 23 of two adjacent heat dissipation bodies 21 are communicated with each other. The heat dissipation flow channel 23 has a first inner surface 231 and a second inner surface 232, the first inner surface 231 and the second inner surface 232 are disposed oppositely, the first inner surface 231 is provided with a first protruding structure 2311, the second inner surface 232 is provided with a second protruding structure 2321, and the first protruding structure 2311 and the second protruding structure 2321 are disposed oppositely and stop contacting each other.

As shown in fig. 7, a heating core 40 may be disposed between two adjacent heat dissipation bodies 21, the heating core 40 may be installed in the second installation space 22, and the heat dissipation bodies 21 may exchange heat with the heating core 40, specifically, the heat dissipation bodies 21 may define a heat dissipation flow channel 23, a refrigerant may flow through the heat dissipation flow channel 23, and the refrigerant in the heat dissipation flow channel 23 may exchange heat with the heating core 40, so that the heating core 40 is located in a suitable working temperature range, so as to improve the heating power of the heating core 40, and thus the heater 100 may have higher heating power.

It should be noted that the temperature of the heater 100 is related to the resistance, the heater 100 is started up by heating up after being powered on, the heater 100 is started up and then enters the NTC phase, in which the resistance decreases with the increase of the temperature, and the heater 100 enters the PTC phase as the heater 100 is heated up, in which the resistance increases with the increase of the temperature. The voltage of the whole vehicle can fluctuate to a certain extent under the power-shortage and full-power states. When the heater 100 enters the PTC phase, the surface temperature of the heater core 40 will decrease and the resistance will decrease when the voltage is low; when the voltage is high, the surface temperature of the heater core 40 increases, and the resistance increases. So that the power of the heater 100 is relatively stable without large fluctuations. Therefore, rapidly moving the heater 100 into the PTC phase is advantageous to ensure power stability of the heater 100.

However, in the prior art, the heat dissipation fins are arranged in the heat dissipation device of the heater, and the heat dissipation device in this form can rapidly reduce the temperature of the heater when the heater is started, so that the heater is not easily enter the PTC stage, and the heater is not easily enter a stable working state, which results in unreliable use of the heater.

In the present application, the first protrusion structure 2311 is disposed on the first inner surface 231 of the heat dissipation flow channel 23, the second protrusion structure 2321 is disposed on the second surface of the heat dissipation flow channel 23, and the first protrusion structure 2311 and the second protrusion structure 2321 are disposed relatively and firmly, compared with the form of disposing the heat dissipation fins in the heat dissipation flow channel 23, the heat dissipation capability of the heat dissipation device 20 when the heater 100 is started can be reduced, the heater 100 can be ensured to be started quickly in a low-temperature and low-voltage state, the heater 100 can enter a stable working state quickly, and the use reliability of the heater 100 can be ensured.

In addition, since the heat dissipation fins do not need to be arranged in the heat dissipation flow channel 23, the assembly difficulty of the heat dissipation device 20 can be reduced, so that the assembly difficulty of the heater 100 can be reduced, the assembly efficiency of the heater 100 can be improved, and the human resource cost can be saved. Furthermore, the material can be saved, the production cost of the heater 100 can be reduced, and the weight of the heat sink 20 can be reduced, so that the overall weight of the heater 100 can be reduced, which is favorable for the lightweight design of the heater 100.

Therefore, the first protruding structure 2311 and the second protruding structure 2321 which are opposite and abutted to each other are arranged on the first inner surface 231 and the second inner surface 232, so that the heat dissipation capacity of the heat dissipation device 20 when the heater 100 is started can be reduced, the heater 100 can enter a stable working state quickly, and the use reliability of the heater 100 can be ensured.

In some embodiments of the present invention, as shown in fig. 6-13, first protruding structure 2311 may be provided in a plurality of numbers, second protruding structure 2321 may be provided in a plurality of numbers, and a plurality of first protruding structures 2311 and a plurality of second protruding structures 2321 may be provided in a one-to-one correspondence.

Also, at least one of first and second projecting

structures

2311 and 2321 may be configured as a pillar-type structure, for example, first projecting structure 2311 may be configured as a pillar-type structure, or second projecting structure 2321 may be configured as a pillar-type structure, or both first and second projecting

structures

2311 and 2321 may be configured as a pillar-type structure. Preferably, first tab structure 2311 and second tab structure 2321 are each configured as a post-type structure.

Alternatively, the columnar structure may be a cylindrical structure, such as shown in fig. 11, or the columnar structure may be an elliptical columnar structure, or the columnar structure may be an oblong columnar structure, such as shown in fig. 12. This is not particularly limited by the present application, and preferably, the column structure may be configured as a cylindrical structure. For oblong, it should be explained that for "oblong" it is understood that the two short sides of the rectangle are configured with a rounded shape instead.

This increases the heat exchange area between the heat sink 20 and the heating core 40, and increases the heat exchange efficiency of the heat sink 20, so that the working temperature of the surface of the heating core 40 can be lower, and as can be seen from the above, when the heater 100 is in the PTC stage, the resistance increases with the increase of the temperature. In other words, the resistance decreases with decreasing temperature. Therefore, the heat exchange area between the heat sink 20 and the heating core 40 is increased, which is beneficial to increase the heating power of the heating core 40, so that the heater 100 has higher heating power and the working performance of the heater 100 can be improved.

Alternatively, the heater core 40 may be made of alumina ceramic, which can increase the power density of the heater 100, thereby further improving the operation performance of the heater 100.

In some embodiments of the present invention, as shown in fig. 6, 11-13, two adjacent first protruding structures 2311 are spaced apart, and two adjacent second protruding structures 2321 are spaced apart. The arrangement of the first protruding structures 2311 and the second protruding structures 2321 is reasonable, the first protruding structures 2311 and/or the second protruding structures 2321 can be prevented from obstructing the flow of the refrigerant, the refrigerant can be prevented from being blocked in the heat dissipation flow channel 23, and the refrigerant can be ensured to flow in the heat dissipation flow channel 23 smoothly.

In some embodiments of the present invention, as shown in fig. 7 to 9, the first inner surface 231 and the second inner surface 232 may be spaced apart in a sequential stacking direction (i.e., a front-to-back direction shown in fig. 7) of the plurality of radiator bodies 21, and the first protrusion 2311 may protrude the first inner surface 231 toward the second inner surface 232 and the second protrusion 2321 may protrude the second inner surface 232 toward the first inner surface 231. This arrangement makes it possible to make the volume of the heat dissipating body 21 small and to make the structure of the heat dissipating device 20 compact.

Alternatively, an aluminum-chip-soldered heat sink may be used as the heat sink 20, and the thickness of the stamped aluminum plate is preferably 0.4mm to 0.6mm, so that the weight of the heat sink 20 can be reduced, and the heat transfer path can be shortened, which is beneficial to improving the heat exchange efficiency between the heat sink 20 and the heating core 40.

In some embodiments of the present invention, as shown in fig. 10, the spacing distance between the first inner surface 231 and the second inner surface 232 may be D1, the height of the first protrusion structure 2311 protruding the first inner surface 231 may be D2, the height of the second protrusion structure 2321 protruding the second inner surface 232 may be D3, and the relationship between D1, D2 and D3 is satisfied: d1 ═ D2+ D3.

In other words, the sum of the height of first protruding structure 2311 protruding first inner surface 231 and the height of second protruding structure 2321 protruding second inner surface 232 may be equal to the separation distance between first inner surface 231 and second inner surface 232. The arrangement of the first protruding structure 2311 and the second protruding structure 2321 is reasonable, so that the first protruding structure 2311 can be conveniently arranged on the first inner surface 231, the second protruding structure 2321 can be conveniently arranged on the second inner surface 232, and the production efficiency of the heat dissipation body 21 can be improved.

Further, D1, D2, and D3 may satisfy the relationships: d2 ═ D3 ═ 0.5D 1. In other words, first protruding structure 2311 may protrude a height of first inner surface 231 by half of a spacing distance between first inner surface 231 and second inner surface 232, and second protruding structure 2321 may protrude a height of second inner surface 232 by half of a spacing distance between first inner surface 231 and second inner surface 232. With such an arrangement, the same detection tool can be used for detecting first protruding structure 2311 and second protruding structure 2321, so that the development cost and debugging cost of the detection tool can be reduced.

In some embodiments of the present invention, as shown in fig. 6, 9 and 10, the heat dissipation device 20 may further include: the liquid inlet pipe 41 may be disposed on the end portion of the plurality of heat dissipating bodies 21, and one end of the liquid inlet pipe 41 may extend into the heat dissipating flow channel 23 of the corresponding heat dissipating body 21 in a direction in which the plurality of heat dissipating bodies 21 are sequentially stacked (i.e., a front-back direction shown in fig. 7). Moreover, the depth of the liquid inlet pipe 41 extending into the heat dissipation flow channel 23 of the heat dissipation body 21 corresponding thereto may be H1, the depth of the heat dissipation flow channel 23 may be H2, and H1 and H2 may satisfy the relation: 1/2H2 is not more than H1 is not more than 2/3H 2. I.e. H1 may be any value between 1/2H2 and 2/3H2, preferably H1 equals 1/2H2 or H1 equals 2/3H 2.

It can be understood that the refrigerant can enter the heat dissipation flow channel 23 of the heat dissipation body 21 through the liquid inlet pipe 41, the flow of the refrigerant can be driven by the water pump, if the flow deviation of the refrigerant in the heat dissipation flow channels 23 of the plurality of heat dissipation bodies 21 is large, the flow resistance of the refrigerant in the heat dissipation flow channels 23 of the plurality of heat dissipation bodies 21 is too large, so that the water pump with higher power needs to be selected, and the larger power of the water pump is, the higher the volume, the weight and the cost of the water pump are.

And by setting the H1 to any value between 1/2H2 and 2/3H2, the uniformity of the flow rate of the refrigerant in the heat dissipation channels 23 of the plurality of heat dissipation bodies 21 can be better, and the deviation of the flow rate of the refrigerant in the heat dissipation channels 23 of the plurality of heat dissipation bodies 21 can be reduced, so that a water pump with lower power can be selected, and the volume, the weight and the cost of the water pump can be reduced.

Furthermore, the uniformity of the flow rate of the refrigerant in the heat dissipation channels 23 of the plurality of heat dissipation bodies 21 can be improved, and the power uniformity of the heater cores 40 installed in the plurality of second installation spaces 132 can be ensured, so that the heater 100 can be prevented from being locally overheated or being dried, and the heater 100 can be prevented from being damaged.

Specifically, by setting H1 to any value between 1/2H2 and 2/3H2, the deviation of the refrigerant flow rate in the heat dissipation flow channels 23 of the plurality of heat dissipation bodies 21 can be optimized to about 2%.

In some embodiments of the present invention, as shown in fig. 11, the heat dissipation body 21 provided with the liquid inlet pipe 41 may be provided with a liquid inlet hole 211, the liquid inlet hole 211 may be disposed to communicate with the heat dissipation flow channel 23, and the liquid inlet pipe 41 may extend into the heat dissipation flow channel 23 through the liquid inlet hole 211. The arrangement can realize the communication between the heat dissipation flow channel 23 of the heat dissipation body 21 provided with the liquid inlet pipe 41 and the liquid inlet pipe 41, and the refrigerant in the liquid inlet pipe 41 can smoothly flow into the heat dissipation flow channel 23 of the heat dissipation body 21 provided with the liquid inlet pipe 41.

Further, the heat dissipation body 21 provided with the liquid outlet pipe 43 may be provided with a liquid outlet hole, the liquid outlet hole may be communicated with the heat dissipation flow channel 23, and the liquid outlet pipe 43 may extend into the heat dissipation flow channel 23 through the liquid outlet hole. The arrangement can realize the communication between the heat dissipation flow channel 23 of the heat dissipation body 21 provided with the liquid outlet pipe 43 and the liquid outlet pipe 43, and the refrigerant in the heat dissipation flow channel 23 of the heat dissipation body 21 provided with the liquid outlet pipe 43 can smoothly flow to the liquid outlet pipe 43.

In some embodiments of the present invention, as shown in fig. 11 to 13, the heat dissipation bodies 21 may each be provided with a connection hole 212 communicating with the heat dissipation flow passage 23, and the connection hole 212 of one heat dissipation body 21 of adjacent two heat dissipation bodies 21 may communicate with the connection hole 212 of the other heat dissipation body 21. The arrangement can connect two adjacent heat dissipation bodies 21, and can ensure that the refrigerant in the liquid inlet pipe 41 can smoothly flow into the heat dissipation flow channels 23 of the plurality of heat dissipation bodies 21.

Alternatively, the connection hole 212 of one heat dissipation body 21 of the adjacent two heat dissipation bodies 21 may communicate with the connection hole 212 of the other heat dissipation body 21 in various ways. For example, the connection hole 212 of one heat dissipation body 21 of the adjacent two heat dissipation bodies 21 may be communicated with the connection hole 212 of the other heat dissipation body 21 through a connection pipe, or the two connection holes 212 of the adjacent two heat dissipation bodies 21 may be protruded toward each other and disposed in connection, or the two connection holes 212 of the adjacent two heat dissipation bodies 21 may be protruded toward each other and the two connection holes 212 may be communicated with each other through a connection pipe. This is not specifically limited by the present application.

Further, as shown in fig. 11 to 13, the connection hole 212 may be configured as an oblong hole, which means a hole having a cross section of an "oblong shape". By "oblong" it is understood that the two short sides of the rectangle are configured in the shape of a circular arc instead. It is understood that the water resistance of the flow passage is largely between the flow passage and the flow passage hole, and by configuring the connection hole 212 as an oblong hole, the flow area of the connection hole 212 can be increased, and the water resistance between the flow passage and the flow passage hole can be reduced.

Taking a circular hole with a diameter of 16mm as an example, if the connection hole 212 is configured as a circular hole with a diameter of 16mm, the flow resistance of the refrigerant is about 2.5KPa (10L/min 60 ℃), and if the circular hole with the diameter of 16mm is changed into an oblong hole, the flow resistance of the refrigerant can be reduced from 2.5KPa (10L/min 60 ℃) to 1.2KPa (10L/min 60 ℃).

In some embodiments of the present invention, as shown in fig. 13, in the length direction of the heat dissipation body 21, a plurality of first protruding structures 2311 and a plurality of second protruding structures 2321 in the heat dissipation flow channel 23 may form a plurality of columns, a spacing distance between two adjacent first protruding structures 2311 in each column may be the same, and a spacing distance between two adjacent second protruding structures 2321 in each column is the same.

Alternatively, as shown in fig. 13, plurality of first protrusion structures 2311 may be configured as three rows of protrusion structures, and a distance between adjacent two first protrusion structures 2311 in each row of protrusion structures may be H in a left-right direction shown in fig. 13, and a distance between every adjacent two rows of protrusion structures in three rows of protrusion structures may be e in an up-down direction shown in fig. 13.

Further, in the up-down direction shown in fig. 13, the projection of the first protruding structures 2311 in the first row of protruding structures corresponds to the projection of the first protruding structures 2311 in the third row of protruding structures one-to-one, and in the up-down direction shown in fig. 13, the distance between the first protruding structure 2311 in the first row of protruding structures and the first protruding structure 2311 in the adjacent second row of protruding structures is H, and preferably, H is 1/2H. The arrangement can make the refrigerant circulating in the heat dissipation channel 23 in a turbulent state, thereby further improving the heat exchange efficiency between the refrigerant in the heat dissipation channel 23 and the heating core 40, and reducing the production difficulty of the heat dissipation device 20, thereby being beneficial to reducing the manufacturing cost of the heat dissipation device 20.

Further, the arrangement of second plurality of protruding structures 2321 corresponds to the arrangement of first plurality of protruding structures 2311.

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.

In the description of the present invention, it is to be understood that the terms "central," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," "axial," "radial," "circumferential," and the like are used in the orientations and positional relationships indicated in the drawings for convenience in describing the utility model and to simplify the description, and are not intended to indicate or imply that the referenced device or element must have a particular orientation, be constructed and operated in a particular orientation, and are not to be considered limiting of the utility model.

In the description of the present invention, "the first feature" and "the second feature" may include one or more of the features.

In the description of the present invention, "a plurality" means two or more.

In the description of the present invention, the first feature being "on" or "under" the second feature may include the first and second features being in direct contact, and may also include the first and second features being in contact with each other not directly but through another feature therebetween.

In the description of the utility model, "above", "over" and "above" a first feature in a second feature includes the first feature being directly above and obliquely above the second feature, or simply means that the first feature is higher in level than the second feature.

In the description herein, references to the description of the term "one embodiment," "some embodiments," "an illustrative embodiment," "an example," "a specific example," or "some examples" or the like mean that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the utility model. In this specification, the schematic representations of the terms used above do not necessarily refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.

While embodiments of the utility model have been shown and described, it will be understood by those of ordinary skill in the art that: various changes, modifications, substitutions and alterations can be made to the embodiments without departing from the principles and spirit of the utility model, the scope of which is defined by the claims and their equivalents.

Claims

1. A heater (100), comprising:

a housing (10);

the heat dissipation device (20), the heat dissipation device (20) is arranged in the shell (10), and a heat dissipation flow channel (23) is defined in the heat dissipation device (20);

a heating core (40), wherein the heating core (40) is arranged in the shell (10) and exchanges heat with the heat sink (20);

the liquid inlet pipe (41) is mounted on the heat dissipation device (20) and communicated with the heat dissipation flow channel (23), the liquid inlet pipe (41) is provided with a first temperature detection piece (42), and the first temperature detection piece (42) is used for detecting the temperature of a cooling medium in the liquid inlet pipe (41);

drain pipe (43), drain pipe (43) install in heat abstractor (20) and with heat dissipation runner (23) intercommunication, drain pipe (43) are equipped with second temperature detection piece (44), second temperature detection piece (44) are used for detecting coolant temperature in drain pipe (43).

2. The heater (100) according to claim 1, wherein the side wall of the liquid inlet pipe (41) is provided with the first temperature detection member (42), and the liquid inlet pipe (41) has a diameter R₁The first temperature detection piece (42) extends into the liquid inlet pipe (41) for a length H₁And satisfies the relation: 0.5R₁≤H₁。

3. The heater (100) according to claim 1, wherein the side wall of the outlet pipe (43) is provided with the second temperature detecting member (44), and the diameter of the outlet pipe (43) is R₂The length of the second temperature detection piece (44) extending into the liquid outlet pipe (43) is H₂And satisfies the relation: 0.5R₂≤H₂。

4. The heater (100) of claim 1, wherein the housing (10) comprises: the liquid cooling device comprises a first shell (12) and a second shell (13), wherein the first shell (12) and the second shell (13) jointly define a mounting cavity (14), the first shell (12) and the second shell (13) jointly define a first through hole (121) and a second through hole (131) which are communicated with the mounting cavity (14), the heat dissipation device (20) and the heating core (40) are installed in the mounting cavity (14), the liquid inlet pipe (41) penetrates through the first through hole (121), and the liquid outlet pipe (43) penetrates through the second through hole (131).

5. The heater (100) of claim 4, further comprising: the circuit board (133) and the heater switch (134), first installation space (132) is injectd to second casing (13), circuit board (133) with heater switch (134) all install in first installation space (132), circuit board (133) with heating core (40), heater switch (134) all are connected, second casing (13) is equipped with mounting structure (135), heater switch (134) through fastener (136) that have the heat conduction effect install in mounting structure (135).

6. The heater (100) of claim 5, wherein a rib (138) having a heat conducting effect is connected between the mounting structure (135) and the second housing (13);

a heat conducting sheet (139) is interposed between the heater switch (134) and the second housing (13).

7. The heater (100) according to any of claims 4 to 6, wherein the first housing (12) is a plastic part and the second housing (13) is a metal part.

8. The heater (100) according to claim 1, wherein the heat sink (20) comprises a plurality of heat sink bodies (21), each heat sink body (21) defines a heat sink flow channel (23), the plurality of heat sink bodies (21) are sequentially stacked, a second installation space (22) is formed between two adjacent heat sink bodies (21), the heating core (40) is installed in the second installation space (22) and exchanges heat with the heat sink bodies (21), and the heat sink flow channels (23) of two adjacent heat sink bodies (21) are communicated; wherein,

the heat dissipation flow channel (23) is provided with a first inner surface (231) and a second inner surface (232) which are opposite, the first inner surface (231) is provided with a first protruding structure (2311), the second inner surface (232) is provided with a second protruding structure (2321), and the first protruding structure (2311) and the second protruding structure (2321) are opposite and abut against each other.

9. The heater (100) of claim 8, wherein the first protruding structures (2311) and the second protruding structures (2321) are provided in a plurality, and a plurality of the first protruding structures (2311) and a plurality of the second protruding structures (2321) are in one-to-one correspondence;

at least one of the first protruding structure (2311) and the second protruding structure (2321) is configured as a pillar-type structure.