Liquid rapid heating device

Abstract

The present invention relates to a liquid rapid heating device, comprising: a sleeve; a heating body, which is arranged in the sleeve, and whose extension direction is consistent with the extension direction of the sleeve; a guide groove is arranged on the outer wall of the heating body along its extension direction, and a water flow channel is formed by the gap between the guide groove of the heating body and the inner wall of the sleeve; a heat transfer element is attached to the outer wall of the heating body, and the inner wall of the sleeve has a part that fits tightly with the heat transfer element, and a temperature sensing device is arranged on the fitting part. The heat transfer platform can fit tightly with the temperature sensing platform on the sleeve wall, so that the heat generated by the heating body can be quickly transferred to the temperature sensing platform of the sleeve, the temperature distribution on the temperature sensing platform is more uniform, and the temperature detection of the temperature sensing device is more accurate.

Description

Technical Field

[0001] The invention relates to the technical field of heating devices, and in particular to a liquid rapid heating device. Background Art

[0002] The hot water supply of existing brewing machines, such as milk brewing machines or coffee brewing machines, usually adopts a constant temperature type, that is, a heater is set in the water tank to keep the water in the water tank at a set temperature for a long time. In this way, the heater needs to work repeatedly for a long time during the non-brewing period, which not only wastes electricity, but also easily causes damage to the heater. In addition, the water in the water tank is repeatedly heated for a long time, which causes the water quality to deteriorate, affecting the quality of the brewed beverage.

[0003] In order to solve the above technical problems, an instant hot automatic brewing machine has appeared on the market, which has an instant hot heating device. The instant hot heating device mainly extends the water flow path and increases the heating time of the water flow by setting a spiral water flow channel or a labyrinth water flow channel, so that the water flow can be quickly heated to the set temperature. For example, the Chinese utility model patent "Instant hot heating device and automatic brewing machine" with application number CN201720952479.8 (authorization announcement number: CN208339383U) and the Chinese invention patent "A heating element assembly and an electric heating drinking water device using a heating element assembly" with application number CN201911161814.2 (publication number CN110762834A) both disclose such a heating device.

[0004] Among them, in the Chinese invention patent "A heating element assembly and an electric heating drinking water device using a heating element assembly" with application number CN201911161814.2 (publication number CN110762834A), the heating element assembly includes a sleeve, a guide tube installed in the sleeve, a heating rod installed in the center of the guide tube, and pipe joints respectively provided at the upper and lower ends of the sleeve and the guide tube, a water flow channel connected to the pipe joint is provided between the sleeve and the guide tube, and a spiral or labyrinth guide groove is provided on the outer wall of the guide tube. However, in actual use, the temperature detection of the temperature control element on the outer wall of the sleeve of this type of electric heating device is inaccurate. The reason is that, in addition, the spiral or labyrinth guide groove arranged on the outer wall of the guide tube of the heating rod has a certain difference in temperature between the outer edge of the groove rib and the concave position of the guide groove, and the temperature transmitted to the sleeve wall is also different, resulting in uneven temperature on the sleeve wall. The temperature sensing device of the existing product is not fixed on the outer wall of the sleeve. In this way, when the temperature sensing device is set at different positions of the sleeve, the outer wall of the guide tube of the heating body corresponding to it may be the outer edge of the groove rib of the guide groove or it may be the concave position corresponding to the guide groove, and therefore cannot accurately reflect the real-time temperature of the heating body. Summary of the invention

[0005] The technical problem to be solved by the present invention is to provide a liquid rapid heating device which can quickly transfer heat between a heating body with a guide groove and a sleeve sleeved outside the heating body and thus sense temperature.

[0006] The technical solution adopted by the present invention to solve the above technical problems is: a liquid rapid heating device, comprising:

[0007] A sleeve having a water inlet and a water outlet;

[0008] A heating body is arranged in the sleeve, and its extension direction is consistent with the extension direction of the sleeve. A guide groove is arranged on the outer wall of the heating body along its extension direction, and a water flow channel communicating with the water inlet and the water outlet is formed by the gap between the guide groove of the heating body and the inner wall of the sleeve;

[0009] A heat transfer element is attached to the outer wall of the heating body, and the inner wall of the sleeve has a portion that is closely attached to the heat transfer element, and a temperature sensing device is arranged on the attached portion.

[0010] In order to lengthen the heating water path, the guide groove is preferably arranged in a spiral or labyrinth manner, and the outer edge of the guide groove is tightly fitted with the inner wall of the sleeve.

[0011] In order to make the heat transfer element keep consistent with the water temperature more quickly, the inner side of the heat transfer element may also have a protruding portion extending into the guide groove.

[0012] In order to enable faster heat transfer between the sleeve and the heat transfer element and to facilitate processing, it is preferred that the inner wall of the sleeve and the heat transfer element fit closely in a flat surface.

[0013] As an improvement, the fitting part of the sleeve is a strip-shaped temperature-sensing platform formed by the radial inward depression of the sleeve wall and arranged along the extension direction of the sleeve, and the fitting part of the heating body is also a matching strip-shaped heat transfer platform. The temperature-sensing platform and the heat transfer platform are arranged in a strip shape, which provides a larger space for the placement of the temperature sensing end of the temperature sensing device and facilitates the reasonable arrangement of the temperature sensing device; and the temperature-sensing platform of the sleeve is formed by the radial inward depression of the sleeve wall, which also correspondingly reduces the heat transfer path from the heating body to the sleeve tube wall, improves the heat transfer speed, and makes the temperature detection of the temperature sensing device more sensitive and accurate.

[0014] In order to avoid the blockage of the guide groove or the influence of the flow effect of the guide groove caused by the setting of the heat transfer platform, the heat transfer platform spans over at least two adjacent guide grooves in the extension direction of the heating body, wherein the heat transfer platform is provided with an avoidance gap penetrating the corresponding two adjacent guide grooves at the position where it is combined with the outer edge of the corresponding guide groove.

[0015] In order to facilitate the processing of the guide groove and heat transfer platform of the heating body, the heating body includes an electric heating tube and a die-cast aluminum layer wrapped outside the electric heating tube, and the guide groove and the heat transfer platform are formed on the die-cast aluminum layer of the heating body. The die-cast aluminum layer and the electric heating tube can be die-casted into an integral part; or the die-cast aluminum layer and the electric heating tube are separate parts that can be detachably assembled. Specifically, the appropriate processing and molding method can be selected according to the shape of the heating body.

[0016] In order to further improve the temperature sensing accuracy of the temperature sensing device and to facilitate the secure fixing of the temperature sensing device on the cylinder, the outer surface of the temperature sensing platform of the sleeve is a planar structure, the temperature sensing device is tightened on the sleeve by a fixing clip, and the temperature sensing end of the temperature sensing device is attached to the outer surface of the temperature sensing platform.

[0017] In order to facilitate the arrangement of multiple temperature sensing devices, the heating body has two heat transfer platforms, and the sleeve also has two corresponding temperature fuses. One of the two temperature sensing platforms can be provided with a thermostat, and the other can be provided with a temperature fuse, thereby improving the safety of the heating device.

[0018] In order to reduce the heat loss of the heating device, it also includes a heat-insulating shell sleeved outside the sleeve, the heat-insulating shell includes a first half shell and a second half shell buckled on the first half shell. The heat-insulating shell is arranged to be formed by buckling two half shells, which also facilitates the assembly of the heating device.

[0019] Compared with the prior art, the advantages of the present invention are as follows: the heat transfer element attached to the heating body can fit tightly with the corresponding part on the inner wall of the sleeve, so that the heat generated by the heating body can be quickly transferred to the wall of the sleeve, and the temperature distribution on the wall of the sleeve is more uniform, so that the temperature detection of the corresponding temperature sensing device arranged on the sleeve is more accurate. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 It is a schematic diagram of the three-dimensional structure of an embodiment of the present invention;

[0021] Figure 2 It is a schematic diagram of the three-dimensional structure of an embodiment of the present invention (the heat-insulating shell is omitted);

[0022] Figure 3 It is a side view of an embodiment of the present invention after being erected;

[0023] Figure 4 An exploded view of an embodiment of the present invention;

[0024] Figure 5 Schematic diagram of the three-dimensional structure of the heating body of an embodiment of the present invention (the guide groove is a spiral guide groove);

[0025] Figure 6A side view of an embodiment of the present invention;

[0026] Figure 7 Schematic diagram of the three-dimensional structure of the heating body of an embodiment of the present invention (the guide groove is a labyrinth guide groove);

[0027] Figure 8 is a side view of a sleeve according to an embodiment of the present invention;

[0028] Fig. 9 It is a transverse cross-sectional view of an embodiment of the present invention (the heat-insulating housing and the temperature sensing device are not shown);

[0029] Fig.10 It is a longitudinal cross-sectional view of an embodiment of the present invention (wherein two temperature sensing devices are arranged on the same side of the sleeve). DETAILED DESCRIPTION

[0030] The present invention is further described in detail below with reference to the accompanying drawings.

[0031] See also Figure 1-Figure 10 A liquid rapid heating device includes a sleeve 10, a heating body 20, a temperature sensing device and a heat-insulating shell 40, wherein the heating body 20 is arranged in the sleeve 10, the extension direction of the heating body 20 is consistent with the extension direction of the sleeve 10, and a water flow channel 30 for water to flow through is formed between the outer wall of the heating body 20 and the inner wall of the sleeve 10.

[0032] Combination Figure 4 In this embodiment, the two ports of the sleeve 10 are respectively connected with a first connector 12 and a second connector 13, and the two ends of the heating body 20 pass through the corresponding connectors to form wiring terminals. The two connectors are respectively provided with a water inlet 101 and a water outlet 102. A sealing silicone sleeve 14 is further provided between the two ports of the sleeve 10 and the corresponding connectors. The sealing silicone sleeve 14 is sealed with the ports of the sleeve 10, the corresponding connectors and the heating body 20 to prevent water leakage.

[0033] The outer wall of the heating body 20 is provided with a guide groove 200 arranged in a spiral or labyrinth manner along its extension direction. Figure 5 The spiral guide groove 200 is shown in FIG. Figure 7 The figure shows a labyrinth-type flow guide groove 200. Specifically, the outer edge of the flow guide groove 200 is closely fitted with the inner wall of the sleeve 10, and the gap between the flow guide groove 200 of the heating body 20 and the inner wall of the sleeve 10 forms a spiral water flow channel 30 or a labyrinth-type water flow channel 30, wherein the water flow channel 30 is connected with the water inlet 101 and the water outlet 102 on the sleeve 10 (connector).

[0034] In order to facilitate the detection of the temperature of the heating body 20 and avoid the problem of dry burning, a heat transfer member 21 is attached to the outer wall of the heating body 20, wherein the inner side of the heat transfer member 21 has a protruding portion extending into the guide groove 200, so that the heat transfer member 21 can be more quickly consistent with the water temperature. Correspondingly, in this embodiment, the heat transfer member 21 is a heat transfer platform 21 formed on the outer wall of the heating body 20 (that is, the heat transfer member 21 and the heating body 20 are an integral part), see Figure 6 and Figure 7 The wall of the sleeve 10 has a temperature sensing platform 11 (see Figure 8 ), the location of the heat transfer platform 21 of the heating body 20 corresponds to the location of the temperature sensing platform 11 of the sleeve 10, and the two are closely attached to each other (combined Fig. 9 ), so that the heat of the heating body 20 can be quickly transferred to the temperature sensing platform 11 of the sleeve 10. Correspondingly, a temperature sensing device is provided on the outer surface of the temperature sensing platform 11 of the sleeve 10. The temperature sensing device can be a temperature controller 51, a temperature fuse 52 and other devices.

[0035] See also Fig. 9 and Fig.10 In this embodiment, the inner surface of the temperature sensing platform 11 of the sleeve 10 is a planar structure, and the outer surface of the heat transfer platform 21 of the heating body 20 is also a planar structure. The size and shape of the two are roughly the same, that is, the temperature sensing platform of the sleeve 10 and the heat transfer platform 21 of the heating body 20 are tightly fitted in a planar form. On the other hand, the outer surface of the temperature sensing platform 11 of the sleeve 10 is also a planar structure, wherein the temperature sensing device is tightened on the outer peripheral wall of the sleeve 10 by an annular fixing clamp 15, and the temperature sensing end of the temperature sensing device is fitted on the outer surface of the temperature sensing plane, see Figure 3 and Figure 4 .

[0036] See also Figure 5 and Figure 7 In this embodiment, the sleeve 10 is cylindrical, and the temperature sensing platform 11 on the wall of the sleeve 10 is a strip platform arranged along the extension direction of the sleeve 10. Correspondingly, the heat transfer platform 21 of the heating body 20 is also a strip platform adapted to the heat transfer platform 21. The wall position of the sleeve 10 for placing the temperature sensing device is set to a platform structure (plane structure). Compared with the arc surface structure of the wall of the sleeve 10 in the prior art, the temperature sensing device and the temperature sensing platform can be fully in contact, and its temperature detection is more accurate, and the temperature sensing device is also more firmly fixed. More specifically, the temperature sensing platform 11 in this embodiment is formed by the radial inward depression of the wall of the sleeve 10. This structural setting also correspondingly reduces the heat transfer path from the heating body 20 to the tube wall of the sleeve 10, improves the heat transfer speed, and makes the temperature detection of the temperature sensing device more sensitive and accurate.

[0037] In this embodiment, for the spiral guide groove 200 of the heating body 20, the heat transfer platform 21 spans over at least two adjacent guide grooves 200 in the extension direction of the heating body 20. In order to avoid the blockage of the guide groove 200 or the influence of the flow effect of the guide groove 200 caused by the setting of the heat transfer platform 21, the heat transfer platform 21 is provided with an avoidance gap 22 penetrating the corresponding two adjacent guide grooves 200 at the position where it is combined with the outer edge of the corresponding guide groove 200. For details, see Figure 5 and Figure 6 The guide groove 200 of the heating body 20 may also be a labyrinth guide groove 200, wherein the heat transfer platform 21 provided on the outer wall of the heating body 20 having the labyrinth guide groove 200 can be understood as that the heat transfer platform 21 is provided on the outer wall of the heating body 20 corresponding to the area where the labyrinth guide groove 200 is avoided, that is, when designing the labyrinth guide groove 200 of the heating body 20, a certain area which does not interfere with the labyrinth guide groove 200 can be reserved on the outer wall surface of the heating body 20 for forming the above-mentioned heat transfer platform 21, see Figure 7 .

[0038] See also Figure 4 The heating body 20 includes an electric heating tube 23 and a die-cast aluminum layer 24 wrapped around the electric heating tube 23. The above-mentioned guide groove 200 and heat transfer platform 21 are formed on the die-cast aluminum layer 24 of the heating body 20. Specifically, in this embodiment, the die-cast aluminum layer 24 can be die-casted with the electric heating tube 23 as an integral part, or the die-cast aluminum layer 24 and the electric heating tube 23 can be detachably assembled as separate parts, that is, the die-cast aluminum layer 24 is machined into the corresponding guide groove 200 and heat transfer platform 21 through an aluminum rod machine, and then assembled and fixed with the electric heating tube 23.

[0039] The heating body 20 in this embodiment has two heat transfer platforms 21, and the sleeve 10 also has two corresponding temperature sensing platforms 11. Thus, one of the two temperature sensing platforms 11 can be provided with a temperature controller 51, and the other can be provided with a temperature fuse 52, thereby improving the safety of the heating device.

[0040] The sleeve 10 in this embodiment can be a straight tube type or a bent tube type. The specific selection can be based on actual needs or use environment. When a longer water flow path is required, in order to reduce the overall space occupied by the heating device, the sleeve 10 can be set to a bent tube type, such as a V-shaped, U-shaped, W-shaped or other bent shapes.

[0041] Combination Figure 4The heat-insulating outer shell 40 of this embodiment is sleeved outside the sleeve 10, and can be made of plastic material. The heat-insulating outer shell 40 reduces the heat loss of the heating device. Specifically, the heat-insulating outer shell 40 includes a first half shell 41 and a second half shell 42 buckled on the first half shell 41. The heat-insulating outer shell 40 is configured to be formed by buckling two half shells, which also facilitates the assembly of the heating device.

[0042] The heat transfer platform provided on the heating body of the liquid rapid heating device of this embodiment can be closely fitted with the temperature sensing platform provided on the sleeve wall, so that the heat generated by the heating body can be quickly transferred to the temperature sensing platform of the sleeve, and the temperature distribution on the temperature sensing platform is more uniform, so that the temperature detection of the corresponding temperature sensing device provided on the temperature sensing platform is more accurate. In addition, the heat transfer platform provided on the outer wall of the heating body can avoid the guide groove without affecting the circulation of the water flow, which can effectively extend the water flow path and improve the heating efficiency of the water flow.

Claims

1. A liquid rapid heating device, comprising: The sleeve (10) has a water inlet (101) and a water outlet (102); A heating body (20) is arranged in the sleeve (10), and its extension direction is consistent with the extension direction of the sleeve (10). A guide groove (200) is provided on the outer wall of the heating body (20) along its extension direction, and a water flow channel (30) communicating with the water inlet (101) and the water outlet (102) is formed by the gap between the guide groove (200) of the heating body (20) and the inner wall of the sleeve (10); The invention is characterized in that: a heat transfer element is attached to the outer wall of the heating body (20), the inner wall of the sleeve (10) has a portion that is closely attached to the heat transfer element, and a temperature sensing device is provided on the attached portion; The inner wall of the sleeve (10) and the heat transfer element are closely fitted in a planar form; The fitting part of the sleeve (10) is a strip-shaped temperature sensing platform (11) formed by the wall of the sleeve (10) being recessed radially inward and arranged along the extension direction of the sleeve (10), and the fitting part of the heating body (20) is also a matching strip-shaped heat transfer platform (21); The heating body (20) comprises an electric heating tube (23) and a die-cast aluminum layer (24) wrapped around the electric heating tube (23); The temperature sensing end of the temperature sensing device is attached to the outer surface of the temperature sensing platform (11).

2. The liquid rapid heating device according to claim 1, characterized in that: The guide groove (200) is arranged in a spiral or labyrinth manner, and the outer edge of the guide groove (200) is tightly fitted with the inner wall of the sleeve (10).

3. The liquid rapid heating device according to claim 1, characterized in that: The inner side of the heat transfer element has a protruding portion extending into the guide groove (200).

4. The liquid rapid heating device according to any one of claims 1 to 3, characterized in that: The heat transfer platform (21) spans over at least two adjacent guide grooves (200) in the extension direction of the heating body (20), wherein the heat transfer platform (21) is provided with an avoidance notch (22) penetrating the two adjacent guide grooves (200) at a position where it is combined with the outer edge of the corresponding guide groove (200).

5. The liquid rapid heating device according to any one of claims 1 to 3, characterized in that: The guide groove (200) and the heat transfer platform (21) are formed on the die-cast aluminum layer (24) of the heating body (20).

6. The liquid rapid heating device according to any one of claims 1 to 3, characterized in that: The outer surface of the temperature sensing platform (11) of the sleeve (10) is a planar structure, and the temperature sensing device is fastened to the sleeve (10) by a fixing clamp (15).

7. The liquid rapid heating device according to any one of claims 1 to 3, characterized in that: The heating body (20) has two heat transfer platforms (21), and the sleeve (10) also has two corresponding temperature sensing platforms (11).

8. The liquid rapid heating device according to any one of claims 1 to 3, characterized in that: It also includes a heat-insulating outer shell (40) sleeved outside the sleeve (10), and the heat-insulating outer shell (40) includes a first half shell (41) and a second half shell (42) buckled onto the first half shell (41).

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