heater

Abstract

The utility model discloses a kind of heaters, including shell, electric heating unit, insulating block and bimetallic element;Electric heating unit, insulating block and bimetallic element are all set in shell;Electric heating unit is used to heat medium flowing through fluid passage;Insulating block is fixed to shell;Bimetallic element is fixed to insulating block, and bimetallic element is used to induct the temperature of electric heating unit.In the utility model, temperature sensor and control unit in prior art are replaced by bimetallic element, so that cost can be reduced, and the structure of electric heater can be simple, and weight is smaller.In addition, insulating block is independent of shell, and bimetallic element is connected to shell by insulating block, which can not only improve the insulation performance of bimetallic element and surrounding elements, but also can be designed according to the installation requirements of bimetallic element, so that even without corresponding improvement of shell, the installation of bimetallic element can be facilitated, so that the modification cost of heater can be reduced.

Description

Technical Field

[0001] This utility model relates to the field of electric heating technology, and in particular to a heater. Background Technology

[0002] The automotive fluid heater mainly consists of a housing and a heating element. The housing has a heating chamber, an inlet port, and an outlet port. External fluid can enter the heating chamber through the inlet port, and fluid inside the heating chamber can flow out of the heating chamber through the outlet port. The heating element is connected to the housing and can be energized to generate heat, thereby heating the fluid in the medium flow channel.

[0003] To achieve over-temperature protection, the heater is also equipped with a temperature sensor and a control unit. The temperature sensor collects the temperature of the heating element and transmits the collected signal to the control unit. The control unit is connected to a corresponding control circuit, which controls the on / off state of the power supply circuit for the heating element.

[0004] Specifically, when the temperature detector detects that the temperature of the heating element is too high (exceeding the preset value), the control circuit will disconnect the power supply circuit of the heating element to stop supplying power to the heating element. When the temperature detector detects that the temperature of the heating element does not exceed the preset value, the control circuit can then connect the power supply circuit of the heating element to supply power to the heating element.

[0005] However, this overheat protection method increases the cost of the heater. Utility Model Content

[0006] This utility model provides a heater designed to reduce the cost of heaters.

[0007] To address the aforementioned problems, this utility model provides a heater, comprising a housing, an electric heating unit, an insulating block, and a bimetallic element; the housing has an inlet and an outlet, and a fluid channel is provided inside the housing, the fluid channel connecting the inlet and the outlet; the electric heating unit, the insulating block, and the bimetallic element are all disposed within the housing; the electric heating unit is used to heat the medium flowing through the fluid channel; the insulating block is fixed to the housing; the bimetallic element is fixed to the insulating block, and the bimetallic element is used to sense the temperature of the electric heating unit.

[0008] Optionally, the outer casing includes a first housing, a second housing, and a partition; the first housing and the second housing are connected to enclose a receiving cavity; the partition is disposed within the receiving cavity and divides the receiving cavity into a first cavity and a second cavity spaced apart along a first direction; the fluid channel includes at least a portion of the first cavity; the heating unit is disposed within the first cavity, and the insulating block and the bimetallic element are disposed within the second cavity; the first housing and the second housing are arranged along the first direction, the first housing and the partition enclose the first cavity, and the second housing and the partition enclose the second cavity.

[0009] Optionally, the heater further includes a first limiting element and a second limiting element; both the first limiting element and the second limiting element are located within the second cavity and are connected to the second housing; in the second direction, both sides of the insulating block abut against the first limiting element; in the third direction, both sides of the insulating block abut against the second limiting element; in the first direction, the side of the insulating block away from the partition abuts against the second housing, and the side of the bimetallic element away from the first housing abuts against the partition; the first direction, the second direction, and the third direction are perpendicular to each other.

[0010] Optionally, the first limiting element includes a first busbar and a second busbar; both the first busbar and the second busbar are connected to the second housing and are spaced apart along the second direction; the insulating block is located between the first busbar and the second busbar and abuts against the first busbar and the second busbar; the second limiting element includes a plurality of first electrode plates and a plurality of second electrode plates, the first electrode plates and the second electrode plates being electrically connected to two power supply terminals of the heating unit respectively; each first electrode plate is electrically connected to the first busbar and is spaced apart along the third direction; each second electrode plate is electrically connected to the second busbar and is spaced apart along the third direction; the insulating block is located between two adjacent first electrode plates and abuts against the first electrode plates on both sides thereof; and / or, the insulating block is located between two adjacent second electrode plates and abuts against the second electrode plates on both sides thereof.

[0011] Optionally, the insulating block is an elastic block; the insulating block includes a first insulating part, a second insulating part, and a third insulating part connected in sequence; the first insulating part is located between two adjacent first electrode plates and abuts against the first busbar and the first electrode plates on both sides; the third insulating part is located between two adjacent second electrode plates and abuts against the second busbar and the second electrode plates on both sides; the second insulating part has a mounting groove on its surface near the partition, and the bimetallic element is inserted into the mounting groove.

[0012] Optionally, the first insulating portion is provided with a first insulating hole, which extends along the first direction and penetrates the first insulating portion; and / or, the third insulating portion is provided with a second insulating hole, which extends along the first direction and penetrates the third insulating portion; and / or, in the third direction, both ends of the second insulating portion protrude from the second insulating portion, and both ends of the second insulating portion protrude from the third insulating portion; the first electrode plate and the second electrode plate are respectively located on both sides of the second insulating portion.

[0013] Optionally, in the first direction, the surface of the insulating block near the partition is provided with a mounting groove, and the bimetallic element is inserted into the mounting groove; in the third direction, the mounting groove penetrates the insulating block.

[0014] Optionally, a first limiting structure is provided on the side wall of the mounting groove, and a second limiting structure is provided on the bimetallic element; the first limiting structure cooperates with the second limiting structure to limit the position of the bimetallic element relative to the insulating block in the third direction; and / or, in the first direction, the bimetallic element extends from the surface of the insulating block near the partition into the mounting groove.

[0015] Optionally, the heater further includes a power cord, a sealing ring, and a sealing block; the second housing is provided with a wire passage hole, the wire passage hole including a first hole and a second hole that communicate with each other, the space of the first hole being smaller than the diameter of the second hole; the power cord passes through the wire passage hole, one end of the power cord is electrically connected to the heating unit, and the other end of the power cord is used to electrically connect to a power source; the sealing ring is fitted onto the power cord and located inside the first hole to seal the power cord and the wall of the first hole; the sealing block fills the second hole to seal the power cord and the wall of the second hole.

[0016] Optionally, the insulating block is snapped onto the housing; the bimetallic element is snapped onto the insulating block.

[0017] In the heater provided in this embodiment, a bimetallic element replaces the temperature sensor and control unit in the prior art, thereby reducing costs. This also simplifies the heater's structure and reduces its weight. Furthermore, the insulating block is independent of the outer casing, and the bimetallic element is connected to the casing via the insulating block. This not only improves the insulation performance between the bimetallic element and surrounding components but also allows for customization of the insulating block according to the installation requirements of the bimetallic element. This facilitates the installation of the bimetallic element even without modifications to the outer casing, thus reducing the cost of modifying the heater. Attached Figure Description

[0018] To more clearly illustrate the technical solutions of the embodiments of this utility model, the drawings used in the description of the embodiments of this utility model will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0019] Figure 1 This is a schematic diagram of the structure of a heater provided in one embodiment of the present invention;

[0020] Figure 2 This is a cross-sectional view of a heater provided in one embodiment of the present invention;

[0021] Figure 3 This is a schematic diagram of the structure of the first housing of the heater provided in an embodiment of the present invention;

[0022] Figure 4 This is a schematic diagram of the structure of the second housing of the heater provided in one embodiment of the present invention;

[0023] Figure 5 This is a cross-sectional view of the second housing of a heater provided in one embodiment of the present invention;

[0024] Figure 6 This is a schematic diagram of the structure of the partition plate of the heater provided in one embodiment of the present invention;

[0025] Figure 7 This is a schematic diagram of the structure of the insulating block of the heater provided in one embodiment of the present invention;

[0026] Figure 8 This is a schematic diagram of the structure of the bimetallic element of the heater provided in one embodiment of the present invention;

[0027] Figure 9 This is a schematic diagram of the structure of the first limiting element and the second limiting element of the heater provided in an embodiment of the present invention;

[0028] Figure 10 This is a partial structural diagram of the partition plate of the heater provided in one embodiment of the present invention;

[0029] Figure 11 This is a control circuit diagram of a heater provided in one embodiment of the present invention.

[0030] Instruction manual drawing reference numerals:

[0031] 10. Heater; 20. Primary power supply; 30. Relay; 40. Secondary power supply;

[0032] 1. Outer shell; 11. First shell; 12. Second shell; 121. Wiring hole; 122. First hole; 123. Second hole; 13. Partition; 131. Clearance hole; 14. Receiving cavity; 141. First cavity; 142. Second cavity; 15. Input hole; 16. Output hole;

[0033] 2. Electric heating unit;

[0034] 3. Insulating block; 31. Mounting groove; 32. First limiting structure; 33. First insulating part; 34. Second insulating part; 35. Third insulating part; 36. First insulating hole; 37. Second insulating hole;

[0035] 4. Bimetallic element; 41. Second limiting structure;

[0036] 5. First limiting element; 51. First busbar; 52. Second busbar;

[0037] 6. Second limiting element; 61. First electrode plate; 62. Second electrode plate;

[0038] 7. Power cord;

[0039] 8. Insulating component; 81. First insulating component; 82. Second insulating component. Detailed Implementation

[0040] To make the technical problems solved, technical solutions, and beneficial effects of this utility model clearer, the present utility model will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the present utility model and are not intended to limit the present utility model.

[0041] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "joining" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0042] like Figure 1 and Figure 2 As shown, in one embodiment, the heater 10 includes a housing 1, an electric heating unit 2, an insulating block 3, and a bimetallic element 4; the electric heating unit 2, the insulating block 3, and the bimetallic element 4 are all disposed inside the housing 1; the electric heating unit 2 is used to heat the fluid inside the housing 1; the insulating block 3 is fixed to the housing 1, the bimetallic element 4 is fixed to the insulating block 3, and the bimetallic element 4 is used to sense the temperature of the electric heating unit 2.

[0043] In existing technology, when a temperature sensor is used to detect the temperature of the heating unit 2, a control unit is needed to process the signal from the temperature sensor. When the temperature is too high, the control unit sends a control signal to cut off the power supply to the heating unit 2. For example, a pair of normally closed contacts of the control unit are connected in series in the control circuit. When the temperature of the heating unit 2 is lower than a preset value, the normally closed contacts close, thereby turning on the control circuit; when the temperature of the heating unit 2 is higher than the preset value, the normally closed contacts open, thereby turning off the control circuit. The coil of a relay 30 can be connected in series in the control circuit, and a pair of normally open contacts (defined as switch contacts) of the relay 30 are connected in series to the power supply circuit of the heating unit 2.

[0044] When the control circuit is on, the two contacts of the switch are electrically connected, thus enabling the power supply circuit to conduct and supply power to the heating unit 2. When the control circuit is off, the two contacts of the switch are electrically disconnected, thus enabling the power supply circuit to be disconnected and cutting off the power supply to the heating unit 2.

[0045] In this embodiment, a bimetallic element 4 is used to detect the temperature of the heating unit 2. When the temperature is too high (i.e., exceeds a preset value), the two terminals (i.e., the first terminal and the second terminal) of the bimetallic element 4 will be disconnected. When the temperature is below the preset value, the two terminals of the bimetallic element 4 will be electrically connected. Therefore, when the bimetallic element 4 is connected in series to the control circuit, the control circuit can be disconnected when the temperature is too high and turned on when the temperature is below the preset value. That is, in this embodiment, the bimetallic element 4 is used to replace the temperature sensor and control unit in the prior art, thus reducing costs. At the same time, this also simplifies the structure of the heater and reduces its weight.

[0046] It should be noted that the bimetallic element 4, the other components in the control circuit, and the power supply circuit can all be set using existing technologies.

[0047] Among them, reference Figure 11 The figure shows a schematic diagram of a circuit related to a heater, wherein the control circuit part of the circuit includes a first power supply 20, a bimetallic element 4 and a relay 30, and the power supply circuit part of the circuit includes a second power supply 40, an electric heating unit 2 and a relay 30.

[0048] The first electrode of the first power supply 20 is electrically connected to the first terminal of the bimetallic element 4, the second terminal of the bimetallic element 4 is electrically connected to the first contact of the relay 30, and the second contact of the relay 30 is electrically connected to the second electrode of the first power supply 20. The first contact and the second contact are respectively electrically connected to the two ends of the coil of the relay 30. One of the first electrode and the second electrode of the first power supply 20 can be a positive electrode and the other can be a negative electrode.

[0049] The first electrode of the second power supply 40 is electrically connected to the first power supply terminal of the heating unit 2, the second power supply terminal of the heating unit 2 is electrically connected to the third contact of the relay 30, and the fourth contact of the relay 30 is electrically connected to the second electrode of the second power supply 40. The third and fourth contacts are a set of normally open contacts of the relay 30. When the coil of the relay 30 is energized, the third and fourth contacts are electrically connected; when the coil of the relay 30 is not energized, the third and fourth contacts are electrically disconnected. One of the first and second electrodes of the second power supply 40 can be a positive electrode, and the other a negative electrode. Simultaneously, when the positive and negative electrodes of the second power supply 40 are electrically connected to the first and second power supply terminals of the heating unit 2 respectively, the second power supply 40 can supply power to the heating unit 2 to generate heat.

[0050] In addition, the first power supply 20 can be a low-voltage power supply, and the second power supply 40 can be a high-voltage power supply.

[0051] It should be understood that other components can be included in the actual circuit of heater 10, as long as they achieve the purpose of this application. Furthermore, any one of the components such as the first power supply 20, the second power supply 40, and the relay 30 may or may not be part of heater 10. It should be understood that in other embodiments, the bimetallic element 4 may be directly connected in series in the power supply circuit of the heating unit 2. In this case, the first electrode of the second power supply 40 is electrically connected to the first power supply terminal of the heating unit 2, the second power supply terminal of the heating unit 2 is electrically connected to the first terminal of the bimetallic element 4, and the second terminal of the bimetallic element 4 is electrically connected to the second electrode of the second power supply 40.

[0052] In addition, in this embodiment, the insulating block 3 is independent of the outer shell 1, and the bimetallic element 4 is connected to the outer shell 1 through the insulating block 3. This not only improves the insulation performance between the bimetallic element 4 and the surrounding elements, but also allows the insulating block 3 to be designed according to the installation requirements of the bimetallic element 4. In this way, even without making corresponding improvements to the outer shell 1, the installation of the bimetallic element 4 can be facilitated, thereby reducing the modification cost of the heater 10.

[0053] In one embodiment, the outer casing 1 is provided with an inlet and an outlet, and a fluid channel is provided inside the outer casing 1, which connects the inlet and the outlet. A medium outside the outer casing 1 can enter the fluid channel through the inlet and flow out of the outer casing 1 through the outlet. The heating unit 2 can heat the medium flowing through the fluid channel.

[0054] like Figures 2 to 6 As shown, in one embodiment, the outer casing 1 includes a first housing 11, a second housing 12, and a partition 13; the first housing 11 and the second housing 12 are connected to enclose a receiving cavity 14; the partition 13 is disposed within the receiving cavity 14 and divides the receiving cavity 14 into a first cavity 141 and a second cavity 142 spaced apart along a first direction; an electric heating unit 2 is disposed within the first cavity 141 to heat the fluid within the first cavity 141; an insulating block 3 and a bimetallic element 4 are disposed within the second cavity 142. This improves insulation performance and prevents the heated fluid from adversely affecting the normal operation of the bimetallic element 4. Figure 2 Of the directions shown, the first direction is parallel to the Z-axis.

[0055] The fluid channel includes at least a portion of the first cavity; both the inlet and outlet can be located on the first housing.

[0056] In addition, such as Figure 3 As shown, the first housing 11 is provided with an inlet 15 and an outlet 16, both extending from the outer surface of the first housing 11 to communicate with the first cavity 141. During operation, external fluid to the heater 10 can enter the first cavity 141 through the inlet 15, and fluid within the first cavity 141 can flow out of the heater 10 through the outlet 16. The inlet 15 forms an inlet on the outer surface of the first housing 11, and the outlet 16 forms an outlet on the outer surface of the first housing 11. At this time, both the inlet 15 and the outlet 16 are part of the fluid channel.

[0057] like Figure 2 As shown, in one embodiment, the first housing 11 and the second housing 12 are arranged along a first direction, and the partition 13 is located between the first housing 11 and the second housing 12. The first housing 11 and the partition 13 enclose a first cavity 141, and the second housing 12 and the partition 13 enclose a second cavity 142. This makes the fabrication of the first cavity 141 and the second cavity 142 more convenient.

[0058] In one embodiment, the first housing 11 and the second housing 12 can be connected together by bolts or other fasteners, and the two clamp the partition 13.

[0059] In one embodiment, the first housing 11 has a first receiving hole on the surface of the second housing 12 (defined as the first surface), and the second housing 12 has a second receiving hole on the surface of the first housing 11 (defined as the second surface); the partition 13 closes the opening formed by the first receiving hole on the first surface to form a first cavity 141; the partition 13 closes the opening formed by the second receiving hole on the second surface to form a second cavity 142.

[0060] In one scenario, the first direction is the up-down direction, and the second housing 12 is located above the first housing 11.

[0061] In one embodiment, the insulating block 3 is detachably connected to the outer casing 1, which facilitates the maintenance of the insulating block 3.

[0062] In one embodiment, the insulating block 3 is snapped onto the housing 1 to achieve a detachable connection between the two.

[0063] In one embodiment, the bimetallic element 4 is detachably connected to the insulating block 3, which facilitates the maintenance of the bimetallic element 4.

[0064] In one embodiment, the bimetallic element 4 is snapped onto the insulating block 3 to achieve a detachable connection between the two.

[0065] like Figure 4 and Figure 9 As shown, in one embodiment, the heater 10 further includes a first limiting element 5 and a second limiting element 6; both the first limiting element 5 and the second limiting element 6 are located in the second cavity 142 and are connected to the second housing 12; in the second direction, both sides of the insulating block 3 abut against the first limiting element 5; in the third direction, both sides of the insulating block 3 abut against the second limiting element 6; in the first direction, the side of the insulating block 3 away from the partition 13 abuts against the second housing 12, and the side of the bimetallic element 4 away from the first housing 11 abuts against the partition 13.

[0066] The first direction, the second direction, and the third direction intersect each other pairwise, and each of the three can be perpendicular to the others. Figure 4 and Figure 9 Of the directions shown, the second direction is parallel to the X-axis, and the third direction is parallel to the Y-axis.

[0067] In the first direction, the insulating block 3 and the bimetallic element 4 are clamped by the second housing 12 and the partition 13; in the second direction, the insulating block 3 is clamped and limited by the first limiting element 5; in the third direction, the insulating block 3 is clamped and limited by the second limiting element 6. This arrangement allows the insulating block 3 to be installed more securely.

[0068] In addition, the bimetallic element 4 is in contact with the partition 13, which makes it easier for the heat generated by the heating unit 2 to be transferred to the bimetallic element 4, thereby improving the temperature detection effect of the bimetallic element 4.

[0069] like Figure 9 As shown, in one embodiment, the first limiting element 5 includes a first busbar 51 and a second busbar 52; both the first busbar 51 and the second busbar 52 are connected to the second housing 12 and are spaced apart along a second direction; the insulating block 3 is located between the first busbar 51 and the second busbar 52 and abuts against the first busbar 51 and the second busbar 52; the second limiting element 6 includes a plurality of first electrode plates 61 and a plurality of second electrode plates 62, the first electrode plates 61 and the second electrode plates 62 being electrically connected to the two power supply terminals of the heating unit 2 respectively; each first electrode plate 61 is electrically connected to the first busbar 51 and is spaced apart along a third direction; each second electrode plate 62 is electrically connected to the second busbar 52 and is spaced apart along a third direction; the insulating block 3 is located between two adjacent first electrode plates 61 and abuts against the first electrode plates 61 on both sides thereof; and / or, the insulating block 3 is located between two adjacent second electrode plates 62 and abuts against the second electrode plates 62 on both sides thereof.

[0070] In this embodiment, the insulating block 3 is limited by the corresponding electrode that supplies power to the heating unit 2 so that the insulating block 3 can be snapped into place. This allows for multiple uses of one device and simplifies the structure of the heater 10.

[0071] "Multiple" means two or more. The meaning of the word "multiple" is the same in all embodiments and will not be repeated hereafter.

[0072] In addition, multiple electric heating units 2 are provided, and the first electrode plate 61, the second electrode plate 62 and the electric heating unit 2 can be in one-to-one correspondence. The two power supply terminals (i.e. the first power supply terminal and the second power supply terminal) of the electric heating unit 2 are electrically connected to the corresponding first electrode plate 61 and second electrode plate 62, respectively.

[0073] In use, the two electrodes of the power supply (such as the second power supply 40) are electrically connected to the first busbar 51 and the second busbar 52 through corresponding conductive lines (such as the power line 7 below), so that each heating unit 2 can be powered at the same time.

[0074] It should be understood that the first busbar 51, the second busbar 52, the first electrode plate 61, and the second electrode plate 62 are all conductive plates, which can be metal plates.

[0075] Furthermore, in the second direction, both the first electrode plate 61 and the second electrode plate 62 are located between the first busbar 51 and the second busbar 52, with the first electrode plate 61 spaced apart from the second busbar 52 and the second electrode plate 62 spaced apart from the first electrode plate 61.

[0076] Furthermore, in the second direction, the first electrode plate 61 and the second electrode plate 62 are also spaced apart.

[0077] like Figure 6 As shown, the partition 13 is provided with a clearance hole 131, which penetrates the partition 13 along the first direction. After assembly, the first busbar 51 and the second busbar 52 are both located in the second cavity 142; a part of the first electrode plate 61 is located in the first cavity 141, and the other part of the first electrode plate 61 extends into the second cavity 142 from the clearance hole 131 to electrically connect to the heating unit 2; a part of the second electrode plate 62 is located in the first cavity 141, and the other part of the second electrode plate 62 extends into the second cavity 142 from the clearance hole 131 to electrically connect to the heating unit 2.

[0078] The clearance holes 131 are provided in multiple ways and are spaced apart along a third direction. The first electrode plate 61, the second electrode plate 62 and the clearance holes 131 correspond one to one. The first electrode plate 61 and the second electrode plate 62 both pass through the partition plate 13 through their corresponding clearance holes 131.

[0079] In one embodiment, both the first limiting element 5 and the second limiting element 6 may not directly contact the second housing 12. In a scenario where the second housing 12 is located above the first housing 11, both the first limiting element 5 and the second limiting element 6 may be supported by the partition 13. Wherein, as... Figure 10 As shown, the heater 10 also includes a corresponding insulating component 8. At least a portion of both the first busbar 51 and the second busbar 52 can be disposed within the insulating component 8. The insulating component 8 abuts against the partition 13, thereby enabling the partition 13 to support the first limiting element 5 and the second limiting element 6. At this time, the connection between the first limiting element 5 and the second limiting element 6 and the second housing 12 can also be realized.

[0080] like Figure 10 As shown, the insulation component 8 includes a first insulating member 81 and a second insulating member 82, which are spaced apart along a second direction. At least a portion of the first busbar 51 is disposed within the first insulating member 81, and at least a portion of the second busbar 52 is disposed within the second insulating member 82.

[0081] In one embodiment, the insulating block 3 is an elastic block with a certain elastic deformation capability, which facilitates the installation of the insulating block 3 and the bimetallic element 4. The insulating block 3 can be a rubber block, etc.

[0082] like Figure 7As shown, in one embodiment, in the first direction, the surface of the insulating block 3 near the partition 13 is provided with a mounting groove 31, and the bimetallic element 4 is fitted into the mounting groove 31. Furthermore, in the third direction, the mounting groove 31 extends through the insulating block 3. This facilitates the installation of the bimetallic element 4. Moreover, after assembly, in the third direction, the bimetallic element 4 and / or the conductive wires electrically connected to the bimetallic element 4 can extend out of the mounting groove 31.

[0083] like Figure 7 and Figure 8 As shown, in one embodiment, a first limiting structure 32 is provided on the side wall of the mounting groove 31, and a second limiting structure 41 is provided on the bimetallic element 4; the first limiting structure 32 and the second limiting structure 41 cooperate to limit the position of the bimetallic element 4 relative to the insulating block 3 in the third direction.

[0084] The first limiting structure 32 is a limiting groove located on the side of the mounting groove 31, extending to the surface of the insulating block 3 near the partition 13. The second limiting structure 41 is a protrusion on the bimetallic element 4. In the third direction, the two side walls of the limiting groove abut against the protrusion to limit the position of the bimetallic element 4 in the third direction.

[0085] In addition, in the second direction, the two side walls of the mounting groove 31 abut against the bimetallic element 4 to define the relative position of the bimetallic element 4 in the second direction.

[0086] Meanwhile, in the first direction, the bimetallic element 4 extends from the surface of the insulating block 3 near the partition 13 into the mounting groove 31 and abuts against the partition 13. Simultaneously, in the first direction, the side of the bimetallic element 4 facing away from the partition 13 abuts against the bottom surface of the mounting groove 31.

[0087] like Figure 7 As shown, in one embodiment, the insulating block 3 includes a first insulating portion 33, a second insulating portion 34, and a third insulating portion 35 connected in sequence. The first insulating portion 33 is located between two adjacent first electrode plates 61 and abuts against the first busbar 51 and the first electrode plates 61 on both sides thereon. The third insulating portion 35 is located between two adjacent second electrode plates 62 and abuts against the second busbar 52 and the second electrode plates 62 on both sides thereon. The second insulating portion 34 has a mounting groove 31 on its surface near the partition 13, and the bimetallic element 4 is inserted into the mounting groove 31. That is, the mounting groove 31 is actually provided on the second insulating portion 34, which allows the bimetallic element 4 to be further away from the first electrode plate 61 and the second electrode plate 62, thereby improving the insulation effect.

[0088] In addition, the fact that the mounting groove 31 penetrates the insulating block 3 in the third direction actually means that the mounting groove 31 penetrates the second insulating part 34 in the third direction.

[0089] like Figure 7As shown, in one embodiment, in the third direction, both ends of the second insulating portion 34 protrude from the first insulating portion 33, and both ends of the second insulating portion 34 protrude from the third insulating portion 35. In the second direction, the first electrode plate 61 and the second electrode plate 62 are located on both sides of the second insulating portion 34, respectively.

[0090] In one embodiment, the first insulating part 33, the second insulating part 34, and the third insulating part 35 are all cuboid structures.

[0091] Both the mounting slot 31 and the limiting slot are rectangular slots.

[0092] like Figure 7 As shown, in one embodiment, the first insulating portion 33 is provided with a first insulating hole 36, which extends along a first direction and penetrates the first insulating portion 33. By providing the first insulating hole 36, the first insulating portion 33 can more easily undergo elastic deformation.

[0093] like Figure 7 As shown, in one embodiment, the third insulating portion 35 is provided with a second insulating hole 37, which extends along a first direction and penetrates the second insulating portion 34. Similarly, by providing the second insulating hole 37, the third insulating portion 35 can more easily undergo elastic deformation.

[0094] like Figure 1 and Figure 5 As shown, in one embodiment, the heater 10 further includes a power cord 7, a sealing ring, and a sealing block; the second housing 12 is provided with a wire passage hole 121, which includes a first hole 122 and a second hole 123 that communicate with each other, the space of the first hole 122 being smaller than the diameter of the second hole 123; the power cord 7 passes through the wire passage hole 121, one end of the power cord 7 is electrically connected to the heating unit 2, and the other end of the power cord 7 is used to electrically connect to a power source; the sealing ring is fitted onto the power cord 7 and located inside the first hole 122 to seal the power cord 7 and the hole wall of the first hole 122; the sealing block fills the second hole 123 to seal the space between the power cord 7 and the hole wall of the second hole 123. In this embodiment, the power cord 7 and the second housing 12 are doubly sealed by the sealing ring and the sealing block, which can improve the waterproof effect.

[0095] The sealing ring can be a rubber ring or the like, and the sealing block can be formed by potting.

[0096] Additionally, the wire through hole 121 penetrates the second housing 12, and the second hole 123 forms an opening on the outer surface of the second housing 12, which facilitates the filling of the second hole 123 with adhesive. Furthermore, the first hole 122 forms an opening on the inner surface of the second housing 12. The inner surface of the second housing 12 encloses and forms a second receiving hole.

[0097] Furthermore, there can be two power cables 7 and two corresponding wire holes 121, with the power cable 7 passing through the second housing 12 through its corresponding wire hole. The two power cables 7 can be electrically connected to the first busbar and the second busbar, respectively.

[0098] In one embodiment, the heater 10 further includes a corresponding cable, and the second housing 12 is provided with a through hole that passes through the second housing 12. The cable passes through the second housing from the through hole and is electrically connected to the bimetallic element 4 so that the bimetallic element 4 can be connected in series to the control circuit via the cable. The through hole can also be a stepped hole, and a double seal of sealing ring and sealing block can be used between it and the cable.

[0099] The device may have two cables and two corresponding holes, with the cable passing through the second housing 12 through its corresponding hole. The two cables can be electrically connected to the two terminals of the bimetallic element 4 respectively.

[0100] The technical features of the above embodiments can be combined in any way. For the sake of brevity, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0101] The above-described embodiments are only used to illustrate the technical solutions of this utility model, and are not intended to limit it. Although this utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of this utility model, and should all be included within the protection scope of this utility model.

Claims

1. A heater, characterized in that, Includes the outer casing, heating unit, insulating block, and bimetallic component; The outer casing is provided with an inlet and an outlet, and the outer casing is provided with a fluid channel, which connects the inlet and the outlet. The heating unit, the insulating block, and the bimetallic element are all disposed within the outer casing; The electric heating unit is used to heat the medium flowing through the fluid channel; The insulating block is fixed to the outer casing; The bimetallic element is fixed to the insulating block and is used to sense the temperature of the heating unit.

2. The heater according to claim 1, characterized in that, The outer casing includes a first casing, a second casing, and a partition; The first housing and the second housing are connected to enclose and form a receiving cavity; The partition is disposed within the receiving cavity and divides the receiving cavity into a first cavity and a second cavity spaced apart along a first direction; the fluid channel includes at least a portion of the first cavity; The heating unit is disposed in the first cavity, and the insulating block and the bimetallic element are disposed in the second cavity; The first housing and the second housing are arranged along the first direction, the first housing and the partition form the first cavity, and the second housing and the partition form the second cavity.

3. The heater according to claim 2, characterized in that, The heater further includes a first limiting element and a second limiting element; Both the first limiting element and the second limiting element are located within the second cavity and are connected to the second housing; In the second direction, both sides of the insulating block abut against the first limiting element; In the third direction, both sides of the insulating block abut against the second limiting element; In the first direction, the side of the insulating block opposite to the partition abuts against the second housing, and the side of the bimetallic element opposite to the first housing abuts against the partition; The first direction, the second direction, and the third direction are perpendicular to each other.

4. The heater according to claim 3, characterized in that, The first limiting element includes a first busbar and a second busbar; Both the first busbar and the second busbar are connected to the second housing and are spaced apart along the second direction; The insulating block is located between the first busbar and the second busbar, and abuts against the first busbar and the second busbar; The second limiting element includes a plurality of first electrode plates and a plurality of second electrode plates, wherein the first electrode plates and the second electrode plates are respectively electrically connected to two power supply terminals of the heating unit; Each of the first electrode plates is electrically connected to the first busbar and is spaced apart along the third direction; Each of the second electrode plates is electrically connected to the second busbar and is spaced apart along the third direction; The insulating block is located between two adjacent first electrode plates and abuts against the first electrode plates on both sides thereof; and / or, the insulating block is located between two adjacent second electrode plates and abuts against the second electrode plates on both sides thereof.

5. The heater according to claim 4, characterized in that, The insulating block is an elastic block; The insulating block includes a first insulating part, a second insulating part, and a third insulating part connected in sequence; The first insulating portion is located between two adjacent first electrode plates and abuts against the first busbar and the first electrode plates on both sides thereon; The third insulating part is located between two adjacent second electrode plates and abuts against the second busbar and the second electrode plates on both sides; The second insulating part has a mounting groove on its surface near the partition, and the bimetallic element is inserted into the mounting groove.

6. The heater according to claim 5, characterized in that, The first insulating portion has a first insulating hole, which extends along the first direction and penetrates the first insulating portion; and / or, The third insulating portion is provided with a second insulating hole, the second insulating hole extending along the first direction and penetrating the third insulating portion; and / or, In the third direction, both ends of the second insulating portion protrude from the third insulating portion, and both ends of the second insulating portion protrude from the third insulating portion; the first electrode plate and the second electrode plate are respectively located on both sides of the second insulating portion.

7. The heater according to claim 3, characterized in that, In the first direction, the insulating block has a mounting groove on its surface near the partition, and the bimetallic element is inserted into the mounting groove; In the third direction, the mounting groove penetrates the insulating block.

8. The heater according to claim 7, characterized in that, The mounting groove has a first limiting structure on its side wall and the bimetallic element has a second limiting structure; the first limiting structure and the second limiting structure cooperate to limit the position of the bimetallic element relative to the insulating block in the third direction. And / or, In the first direction, the bimetallic element extends from the surface of the insulating block near the partition into the mounting groove.

9. The heater according to claim 2, characterized in that, The heater also includes a power cord, a sealing ring, and a sealing block; The second housing is provided with a wire passage hole, which includes a first hole and a second hole that are in communication, and the space of the first hole is smaller than the diameter of the second hole; The power cord passes through the wire hole, one end of the power cord is electrically connected to the heating unit, and the other end of the power cord is used to electrically connect to the power source. The sealing ring is fitted onto the power cord and located inside the first hole to seal the power cord and the wall of the first hole. The sealant block fills the second hole to seal the power cord and the wall of the second hole.

10. The heater according to claim 1, characterized in that, The insulating block is snapped into the outer casing; The bimetallic element is snapped into the insulating block.

Images