Heating device

Abstract

The embodiment of the utility model discloses a heating device which comprises a heating pipe and a liquid connector, the liquid connector is inserted into the end portion of the heating pipe, and the heating pipe is used for heating liquid flowing through the heating pipe. The liquid connector is provided with a flow guide structure, and the flow guide structure is used for guiding liquid in the radial direction of the heating pipe, so that when the liquid enters the heating pipe, the liquid is rapidly and timely guided to the inner wall of the heating pipe, it is guaranteed that the liquid is evenly distributed on the inner wall of the heating pipe at the first time when the liquid enters the heating pipe, and the dry burning phenomenon of the heating pipe is reduced; and stable and reliable work of the heating device is ensured.

Description

Technical Field

[0001] The utility model relates to the technical field of heaters, in particular to a heating device. Background Art

[0002] An electric heater is an electrical appliance that uses electrical energy to achieve a heating effect. Usually, an electric heater includes a heating tube, a water inlet column, a water outlet column, and a shell. Liquid enters the heating tube from the water inlet column, and the inner wall of the heating tube transfers heat to the liquid, thereby heating the liquid. During this process, the liquid that enters the heating tube through the water inlet column is not evenly distributed, which can easily lead to dry burning or even bursting of the heating tube. Utility Model Content

[0003] The utility model aims to provide a heating device, aiming to solve the problem that the liquid entering the heating tube through the water inlet column of the existing electric heater is not evenly distributed, which easily leads to the undesirable phenomenon of dry burning or even bursting of the heating tube.

[0004] The embodiment of the utility model provides a heating device, which comprises a heating tube and a liquid joint, wherein the liquid joint is inserted at the end of the heating tube, and the heating tube is used to heat the liquid flowing through the heating tube;

[0005] The liquid joint is provided with a flow guiding structure, and the flow guiding structure is used to guide the liquid along the radial direction of the heating tube.

[0006] In one embodiment, two liquid joints are provided, and the flow guiding structure is provided in at least one of the two liquid joints;

[0007] The two liquid joints are respectively inserted at the two ends of the heating tube.

[0008] In one embodiment, the inner wall of the liquid joint is formed with reinforcing ribs, and the flow-guiding structure is connected to the reinforcing ribs;

[0009] The guide structure is located in the middle position of the inner cavity of the liquid joint. The guide structure is provided with a guide surface for guiding the liquid along the radial direction of the heating tube. The guide surface is inclined relative to the axis of the heating tube. There are multiple guide surfaces, which are arranged around the axis of the heating tube.

[0010] In one embodiment, the radial cross section of the reinforcing rib is cross-shaped, and the flow guide structure is arranged at the intersection of the cross-shaped reinforcing rib.

[0011] In one embodiment, the heating device further comprises a sealing member, the outer wall of the liquid joint is provided with a sealing groove, the sealing member is placed in the sealing groove and elastically abuts between the groove wall of the sealing groove and the inner wall of the heating tube.

[0012] In one of the embodiments, the heating device also includes a shell assembly, which includes a first shell and a second shell, the heating tube extends along a first direction, the first shell and the second shell both extend along the first direction, and can be close to each other and docked along a straight line in the second direction to enclose and form a accommodating cavity, the cavity wall of the accommodating cavity can be abutted against the two liquid joints to suspend the heating component in the accommodating cavity, and the first direction is set at an angle to the second direction.

[0013] In one embodiment, a first mounting groove is formed on a side of the first shell facing the second shell, and a second mounting groove is formed on a side of the second shell facing the first shell, and both the first mounting groove and the second mounting groove extend along the first direction;

[0014] The first mounting groove and the second mounting groove are connected to each other to form the accommodating cavity, and the two ends of the first mounting groove are respectively formed with first engaging surfaces for engaging the liquid joint in the accommodating cavity, and the two ends of the second mounting groove are respectively formed with second engaging surfaces for engaging the liquid joint in the accommodating cavity.

[0015] In one embodiment, the shell assembly is provided with a first bayonet and a second bayonet connected to the accommodating cavity, and the two liquid joints are respectively a first joint and a second joint, the first joint is clamped in the first bayonet and can extend from the first bayonet to the accommodating cavity, and the second joint is clamped in the second bayonet and can extend from the second bayonet to the accommodating cavity;

[0016] A first positioning groove is formed on the mouth wall of the first bayonet, a first positioning protrusion matched with the first positioning groove is formed on the radial outer wall of the first joint, a second positioning groove is formed on the mouth wall of the second bayonet, and a second positioning protrusion matched with the second positioning groove is formed on the radial outer wall of the second joint; and / or,

[0017] A third positioning groove and a fourth positioning groove are respectively formed at the axial ends of the heating tube, a third positioning protrusion matched with the third positioning groove is formed on the outer wall of the first joint, and a fourth positioning protrusion matched with the fourth positioning groove is formed on the outer wall of the second joint.

[0018] In one embodiment, a first connecting hole is provided on the first shell, a second connecting hole is provided on the second shell, and the heating device further includes a mounting member, which can pass through the second connecting hole and be connected to the hole wall of the first connecting hole to connect the first shell with the second shell.

[0019] In one embodiment, the heating device further comprises a first sensing member and a second sensing member, the two liquid joints are respectively a first joint and a second joint, the first joint is provided with an axially extending first channel and a first through hole connected to the first channel, the first through hole is provided on the radial outer wall of the first joint, the first sensing member is penetrated through the first through hole and extends into the first channel, the second joint is provided with an axially extending second channel and a second through hole connected to the second channel, the second through hole is provided on the radial outer wall of the second joint, the second sensing member is penetrated through the second through hole and extends into the second channel;

[0020] A first pressing structure and a second pressing structure are respectively formed at two ends of the first shell, the first pressing structure is used to abut and hold the first sensing member in the first through hole, and the second pressing structure is used to abut and hold the second sensing member in the second through hole.

[0021] The following beneficial effects are achieved by using the embodiments of the present invention:

[0022] With the heating device of the utility model, the liquid joint is provided with a guide structure, which is used to guide the liquid along the radial direction of the heating tube, so that when the liquid enters the heating tube, the liquid is quickly and timely guided to the inner wall of the heating tube, thereby ensuring that the liquid is evenly distributed on the inner wall of the heating tube as soon as it enters, reducing the dry burning phenomenon of the heating tube and ensuring stable and reliable operation of the heating device. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] In order to more clearly illustrate the embodiments of the utility model or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0024] in:

[0025] Figure 1 FIG. 1 is an exploded view of a heating device in one embodiment.

[0026] Figure 2 for Figure 1 Enlarged schematic diagram of part A in the middle.

[0027] Figure 3 for Figure 1 Enlarged schematic diagram of part B in the middle.

[0028] Figure 4 for Figure 1 Schematic diagram of the liquid junction in the heating device shown.

[0029] Figure 5 for Figure 1 A cross-sectional view of the heating device shown.

[0030] Figure 6 for Figure 5 Enlarged schematic diagram of part C in the middle.

[0031] Reference numerals: 100, shell assembly; 110, first shell; 111, first mounting groove; 113, first pressing structure; 114, second pressing structure; 115, fixing groove; 116, first connecting hole; 120, second shell; 121, second mounting groove; 122, second engaging surface; 123, second connecting hole; 101, accommodating cavity; 102, first bayonet; 103, second bayonet; 104, first positioning groove; 105, second positioning groove; 106, heat dissipation hole; 200, heating tube; 220, fourth positioning groove; 300, liquid joint; 3 10. First joint; 311. First positioning protrusion; 312. First channel; 313. First through hole; 314. Guide structure; 3141. Guide surface; 315. Reinforcement rib; 316. Sealing groove; 317. Undercut structure; 318. Third positioning protrusion; 320. Second joint; 321. Second positioning protrusion; 322. Second channel; 323. Second through hole; 324. Fourth positioning protrusion; 301. Abutment surface; 410. First sensing member; 420. Second sensing member; 430. First sealing ring; 450. Mounting member; 460. Sealing member. DETAILED DESCRIPTION

[0032] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0033] It should be noted that all directional indications (such as up, down, left, right, front, back...) in the embodiments of the present invention are only used to explain the relative position relationship, movement status, etc. between the components under a certain specific posture (as shown in the accompanying drawings). If the specific posture changes, the directional indication will also change accordingly.

[0034] In addition, the descriptions of "first", "second", etc. in the present utility model are only used for descriptive purposes and cannot be understood as indicating or implying their relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include at least one of the said features. In addition, the technical solutions between the various embodiments can be combined with each other, but they must be based on the ability of ordinary technicians in this field to implement them. When the combination of technical solutions is contradictory or cannot be implemented, it should be deemed that such combination of technical solutions does not exist and is not within the scope of protection required by the present utility model.

[0035] The utility model discloses a heating device, which is mainly used to heat liquid. Figures 1 to 6 A heating device of an embodiment includes a heating tube 200 and a liquid joint 300. The liquid joint 300 is inserted at the end of the heating tube 200. The heating tube 200 is used to heat the liquid flowing through the heating tube 200. The liquid joint 300 is provided with a guide structure 314. The guide structure 314 is used to guide the liquid along the radial direction of the heating tube 200, so that when the liquid enters the heating tube 200, the liquid is quickly and timely guided to the inner wall of the heating tube 200, thereby ensuring that the liquid is evenly distributed on the inner wall of the heating tube 200 at the first time of entering, reducing the dry burning phenomenon of the heating tube 200, and ensuring stable and reliable operation of the heating device.

[0036] The liquid of this embodiment can be water, milk, coffee, etc. The heating device of this embodiment can be applied to hot drink equipment such as instant hot water dispenser, instant hot coffee machine, instant hot water heater, instant hot milk warmer, etc.

[0037] In one embodiment, see Figures 1 to 6 , there are two liquid joints 300, and the guide structure 314 is provided on at least one of the two liquid joints 300; the two liquid joints 300 are respectively inserted at both ends of the heating tube 200. It can be understood that one of the two liquid joints 300 is a water inlet joint, and the guide structure 314 is at least provided on the water inlet joint, so that the liquid can be quickly and timely guided to the inner wall of the heating tube 200, reducing the dry burning phenomenon of the heating tube 200. Of course, in other embodiments, the guide structure 314 can be provided on both liquid joints 300, so as to facilitate the assembly of the heating device.

[0038] In one embodiment, see Figures 4 to 6 The inner wall of the liquid joint 300 is formed with a reinforcing rib 315 , and the flow guiding structure 314 is connected to the reinforcing rib 315 , which not only facilitates the arrangement of the flow guiding structure 314 , but also enhances the structural strength of the liquid joint 300 .

[0039] In this embodiment, the guide structure 314 is located in the middle position of the inner cavity of the liquid joint 300, and a guide surface 3141 is provided on the guide structure 314 for guiding the liquid along the radial direction of the heating tube 200. The guide surface 3141 is inclined relative to the axis of the heating tube 200, so as to guide the liquid to flow radially to the inner wall of the heating tube 200.

[0040] Furthermore, the guide surface 3141 is provided in plurality and is arranged around the axis of the heating tube 200, so as to ensure that the liquid is evenly distributed on the inner wall of the heating tube 200. Specifically, the radial cross section of the reinforcing rib 315 is cross-shaped, and the flow guiding structure 314 is arranged at the intersection of the cross-shaped reinforcing rib 315, so as to ensure the stability of the flow guiding structure 314. Of course, in other embodiments, the guide surface 3141 can also be a frustum or an edge surface arranged around the axis of the heating tube 200, and the radial cross section of the reinforcing rib 315 can also be Y-shaped or other shapes.

[0041] In one embodiment, see Figure 3 , Figure 4 and Figure 6 The heating device further includes a sealing member 460. The outer wall of the liquid joint 300 is provided with a sealing groove 316. The sealing member 460 is placed in the sealing groove 316 and elastically abuts between the groove wall of the sealing groove 316 and the inner wall of the heating tube 200, thereby ensuring the sealing of the inner cavity of the heating tube 200. Further, the sealing member 460 is a sealing ring. The sealing groove 316 is arranged around the outer peripheral wall of the liquid structure, and a plurality of sealing members 460 are provided, and are arranged one by one corresponding to each sealing groove 316, thereby further enhancing the sealing of the inner cavity of the heating tube 200.

[0042] It is understandable that the arrangement of the reinforcing ribs 315 can evenly distribute and reinforce the structure at the sealing groove 316 , thereby avoiding structural deformation at the sealing groove 316 due to long-term high-temperature operation, thereby reducing the risk of water leakage at the sealing groove 316 .

[0043] In one embodiment, see Figure 1 The heating device further includes a shell assembly 100, which includes a first shell 110 and a second shell 120. The heating tube 200 extends along the first direction. The first shell 110 and the second shell 120 both extend along the first direction and can be close to each other and docked along the straight line where the second direction is located to enclose a receiving cavity 101. The cavity wall of the receiving cavity 101 can be abutted against the two liquid joints 300 to suspend the heating component in the receiving cavity 101. The first direction and the second direction are set at an angle. By assembling the first shell 110 and the second shell 120 along the radial direction of the heating tube 200, it is more convenient to visualize the installation, thereby improving the assembly efficiency. Figure 1The direction indicated by arrow X is the first direction, and the direction indicated by arrow Y is the second direction.

[0044] It can be understood that during assembly, the two liquid connectors 300 can be conveniently inserted into the two ends of the heating tube 200 to form an assembly, and then the first shell 110 and the second shell 120 are connected, and the assembly is arranged to be enclosed and installed in the accommodating cavity 101. The assembly process is convenient and there is no need to connect multiple installation relationships at the same time, so that the assembly efficiency of the heating device is high and it is convenient for mass production.

[0045] In this embodiment, the first direction is perpendicular to the second direction. Of course, the first direction and the second direction can also be arranged at an angle of 70°-110°, that is, the angle between the first direction and the second direction can also be selected as 70°, 80°, 85°, 95°, 100°, 105° or 110°. Specifically, the inner wall of the accommodating cavity 101 and the outer wall of the heating tube 200 are gap-matched to form a heat dissipation space, and a plurality of heat dissipation holes 106 connected to the heat dissipation space are distributed on the shell assembly 100.

[0046] In one embodiment, see Figure 1 The first housing 110 is provided with a first mounting groove 111 on one side facing the second housing 120, and the second housing 120 is provided with a second mounting groove 121 on one side facing the first housing 110. Both the first mounting groove 111 and the second mounting groove 121 extend along the first direction. The first mounting groove 111 and the second mounting groove 121 are connected to each other to form a receiving cavity 101. The first mounting groove 111 is provided with a first engaging surface at both ends thereof for engaging the liquid joint 300 in the receiving cavity 101, and the second mounting groove 121 is provided with a second engaging surface 122 at both ends thereof for engaging the liquid joint 300 in the receiving cavity 101. The two liquid joints 300 can be stably mounted in the receiving cavity 101 by providing the first engaging surface and the second engaging surface 122.

[0047] For details, please refer to Figure 3 , the two liquid joints 300 are formed with abutting surfaces 301 for abutting against the first clamping surface and the second clamping surface 122. Furthermore, the abutting surface 301 is arranged around the axial outer wall of the liquid joint 300 and is arranged away from the heating tube 200. Of course, in other embodiments, the first shell 110 is provided with a mounting groove on the side facing the second shell 120, and the second shell can be selected as a cover plate. The two ends of the mounting groove are respectively formed with clamping surfaces for clamping the liquid joint 300 in the accommodating cavity 101. By such an arrangement, the two liquid joints 300 can also be stably installed in the accommodating cavity 101.

[0048] In one embodiment, see Figures 1 to 6The shell assembly 100 is provided with a first bayonet 102 and a second bayonet 103 connected to the accommodating cavity 101, and the two liquid joints 300 are respectively a first joint 310 and a second joint 320. The first joint 310 is clamped in the first bayonet 102 and can extend from the first bayonet 102 to the accommodating cavity 101. The second joint 320 is clamped in the second bayonet 103 and can extend from the second bayonet 103 to the accommodating cavity 101, thereby facilitating liquid inlet into the first joint 310 and liquid outlet from the second joint 320.

[0049] Furthermore, in the present embodiment, a first positioning groove 104 is formed on the mouth wall of the first bayonet 102, a first positioning protrusion 311 matched with the first positioning groove 104 is formed on the radial outer wall of the first joint 310, a second positioning groove 105 is formed on the mouth wall of the second bayonet 103, and a second positioning protrusion 321 matched with the second positioning groove 105 is formed on the radial outer wall of the second joint 320. The fool-proof structure of the positioning grooves and the positioning protrusions facilitates the assembly of the first joint 310 and the second joint 320 on the first shell 110 and the second shell 120.

[0050] Specifically, the first bayonet 102 and the second bayonet 103 are both circular openings, and the radial cross-sections of the first joint 310 and the second joint 320 are both circular, so as to facilitate the coaxial assembly of the heating tube 200, the first joint 310 and the second joint 320 on the shell assembly 100. Further, a plurality of first positioning grooves 104 are arranged at intervals in the circumferential direction of the first bayonet 102, a plurality of first positioning protrusions 311 are arranged, and are arranged one-to-one with each first positioning groove 104, a plurality of second positioning grooves 105 are arranged at intervals in the circumferential direction of the second bayonet 103, a plurality of second positioning protrusions 321 are arranged, and are arranged one-to-one with each second positioning groove 105.

[0051] In one embodiment, see Figure 1 and Figure 3 A third positioning groove and a fourth positioning groove 220 are respectively formed at the axial ends of the heating tube 200, a third positioning protrusion 318 matched with the third positioning groove is formed on the outer wall of the first joint 310, and a fourth positioning protrusion 324 matched with the fourth positioning groove 220 is formed on the outer wall of the second joint 320. The fool-proof structure of the positioning grooves and the positioning protrusions facilitates the assembly of the first joint 310 and the second joint 320 on the heating tube 200.

[0052] In one embodiment, see Figure 1The first shell 110 is provided with a first connection hole 116, the second shell 120 is provided with a second connection hole 123, and the heating device further includes a mounting member 450, which can penetrate the second connection hole 123 and be connected to the hole wall of the first connection hole 116 to connect the first shell 110 with the second shell 120, so as to connect the first shell 110 with the second shell 120, thereby realizing the assembly of the first shell 110 with the second shell 120. Specifically, the mounting member 450 can be a screw or a stud.

[0053] Further, in this embodiment, a plurality of first connection holes 116 are provided and are spaced around the first housing 110, and a plurality of second connection holes 123 and mounting members 450 are provided and are arranged one-to-one with each first connection hole 116, thereby ensuring the firmness of the assembly of the first housing 110 and the second housing 120. Further, four mounting members 450 may be selected, and the four mounting members 450 are distributed at the four corners of the first housing 110.

[0054] Specifically, the inner wall of the first shell 110 is convex to form a first groove body, and the outer wall of the second shell 120 is concave to form a second groove body. The first groove body and the second groove body are interconnected to form an escape space for the installation component 450 to pass through, thereby facilitating the installation of the installation component 450.

[0055] In one embodiment, see Figures 1 to 6 The heating device also includes a first sensing member 410 and a second sensing member 420. The two liquid joints 300 are respectively the first joint 310 and the second joint 320. The first joint 310 is provided with an axially extending first channel 312 and a first through hole 313 connected to the first channel 312. The first through hole 313 is provided on the radial outer wall of the first joint 310. The first sensing member 410 is penetrated by the first through hole 313 and extends into the first channel 312, so that the temperature of the liquid in the first channel 312 can be sensed by the first sensing member 410. The second joint 320 is provided with an axially extending second channel 322 and a second through hole 323 connected to the second channel 322. The second through hole 323 is provided on the radial outer wall of the second joint 320. The second sensing member 420 is penetrated by the second through hole 323 and extends into the second channel 322, so that the temperature of the liquid in the second channel 322 can be sensed by the second sensing member 420.

[0056] In this embodiment, a first pressing structure 113 and a second pressing structure 114 are formed at both ends of the first shell 110, respectively. The first pressing structure 113 is used to abut and hold the first sensor 410 in the first through hole 313, and the second pressing structure 114 is used to abut and hold the second sensor 420 in the second through hole 323. Through the above arrangement, when the first shell 110 and the second shell 120 are assembled, the first pressing structure 113 can install the first sensor 410 in the first through hole 313, and the second pressing structure 114 can install the second sensor 420 in the second through hole 323, so that the assembly of the first sensor 410 and the second sensor 420 can be completed without additional fastening components. It can be understood that by reducing the use of fastening components, the number of installation components can be reduced, which is beneficial to material control and reduces the quality risks caused by the accumulation of material assembly tolerances.

[0057] Specifically, the first pressing structure 113 and the second pressing structure 114 are both provided with a fixing groove 115, and the fixing groove 115 is used for the wire of the sensing member to pass through, so as to facilitate wiring. The heating device also includes a first sealing ring 430 and a second sealing ring, the first sealing ring 430 elastically abuts between the hole wall of the first through hole 313 and the outer wall of the first sensing member 410, and the second sealing ring elastically abuts between the hole wall of the second through hole 323 and the second sensing member 420.

[0058] It can be understood that in this embodiment, a heating channel is provided in the heating tube 200, and the first channel 312 and the second channel 322 are both connected to the heating channel. One of the first channel 312 and the second channel 322 is a liquid inlet channel, and the other is a liquid outlet channel. The heating tube 200 can heat the liquid flowing through the heating channel, thereby heating the liquid to a preset temperature.

[0059] In one embodiment, see Figure 1 and Figure 5 The first joint 310 and the second joint 320 have the same structure and are symmetrically arranged on both sides of the heating tube 200. The first sensor 410 and the second sensor 420 have the same structure and are symmetrically arranged on both sides of the heating tube 200, so as to improve the assembly efficiency of the heating device. Specifically, the first joint 310 and the second joint 320 are respectively provided with an undercut structure 317, and the undercut structure 317 is connected to the water pipe to prevent the joint from being separated from the water pipe and leaking due to excessive water inlet pressure. Of course, in other embodiments, the structures of the first joint 310 and the second joint 320 may be different.

[0060] The above disclosure is only a preferred embodiment of the present invention, and certainly cannot be used to limit the scope of rights of the present invention. Therefore, equivalent changes made according to the claims of the present invention are still within the scope covered by the present invention.

Claims

1. A heating device, characterized in that: The heating device comprises a heating tube and a liquid joint, wherein the liquid joint is inserted at the end of the heating tube, and the heating tube is used to heat the liquid flowing through the heating tube; The liquid joint is provided with a flow guiding structure, and the flow guiding structure is used to guide the liquid along the radial direction of the heating tube.

2. The heating device according to claim 1, characterized in that There are two liquid joints, and the flow-guiding structure is arranged on at least one of the two liquid joints; The two liquid joints are respectively inserted at the two ends of the heating tube.

3. The heating device according to claim 2, characterized in that: The inner wall of the liquid joint is formed with reinforcing ribs, and the flow-guiding structure is connected to the reinforcing ribs; The guide structure is located in the middle position of the inner cavity of the liquid joint. The guide structure is provided with a guide surface for guiding the liquid along the radial direction of the heating tube. The guide surface is inclined relative to the axis of the heating tube. There are multiple guide surfaces, which are arranged around the axis of the heating tube.

4. The heating device according to claim 3, characterized in that: The radial cross section of the reinforcing rib is cross-shaped, and the flow guide structure is arranged at the intersection position of the cross-shaped reinforcing rib.

5. The heating device according to claim 1, characterized in that: The heating device also includes a sealing member. The outer wall of the liquid joint is provided with a sealing groove. The sealing member is placed in the sealing groove and elastically abuts between the groove wall of the sealing groove and the inner wall of the heating tube.

6. The heating device according to claim 1, characterized in that: The heating device also includes a shell assembly, which includes a first shell and a second shell. The heating tube extends along a first direction. The first shell and the second shell both extend along the first direction and can be close to each other and docked along a straight line in the second direction to enclose a receiving cavity. The cavity wall of the receiving cavity can be abutted against the two liquid joints to suspend the heating tube in the receiving cavity. The first direction is set at an angle to the second direction.

7. The heating device according to claim 6, characterized in that: A first mounting groove is formed on a side of the first shell facing the second shell, and a second mounting groove is formed on a side of the second shell facing the first shell, wherein both the first mounting groove and the second mounting groove extend along the first direction; The first mounting groove and the second mounting groove are connected to each other to form the accommodating cavity, and the two ends of the first mounting groove are respectively formed with first engaging surfaces for engaging the liquid joint in the accommodating cavity, and the two ends of the second mounting groove are respectively formed with second engaging surfaces for engaging the liquid joint in the accommodating cavity.

8. The heating device according to claim 6, characterized in that The shell assembly is provided with a first bayonet and a second bayonet connected to the accommodating cavity, and the two liquid joints are respectively a first joint and a second joint, the first joint is clamped in the first bayonet and can extend from the first bayonet to the accommodating cavity, and the second joint is clamped in the second bayonet and can extend from the second bayonet to the accommodating cavity; A first positioning groove is formed on the mouth wall of the first bayonet, a first positioning protrusion matched with the first positioning groove is formed on the radial outer wall of the first joint, a second positioning groove is formed on the mouth wall of the second bayonet, and a second positioning protrusion matched with the second positioning groove is formed on the radial outer wall of the second joint; and / or, A third positioning groove and a fourth positioning groove are respectively formed at the axial ends of the heating tube, a third positioning protrusion matched with the third positioning groove is formed on the outer wall of the first joint, and a fourth positioning protrusion matched with the fourth positioning groove is formed on the outer wall of the second joint.

9. The heating device according to claim 6, characterized in that: The first shell is provided with a first connecting hole, the second shell is provided with a second connecting hole, and the heating device further comprises a mounting member, which can pass through the second connecting hole and be connected to the hole wall of the first connecting hole to connect the first shell with the second shell.

10. The heating device according to claim 6, characterized in that The heating device further comprises a first sensing member and a second sensing member, the two liquid joints are respectively a first joint and a second joint, the first joint is provided with an axially extending first channel and a first through hole connected to the first channel, the first through hole is provided on a radial outer wall of the first joint, the first sensing member is penetrated through the first through hole and extends into the first channel, the second joint is provided with an axially extending second channel, and a second through hole connected to the second channel, the second through hole being opened on the radial outer wall of the second joint, the second sensing element being passed through the second through hole and extending into the second channel; A first pressing structure and a second pressing structure are respectively formed at two ends of the first shell, the first pressing structure is used to abut and hold the first sensing member in the first through hole, and the second pressing structure is used to abut and hold the second sensing member in the second through hole.

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