Heating device and electronic hookah

Abstract

The utility model provides a heating device and an electronic hookah. The heating device comprises a cup body, a heat conductor and a heating body, the cup body comprises a cup bottom wall and a cup side wall, a heating cavity with an opening is defined by the cup bottom wall and the cup side wall, the cup bottom wall is closed, and an exhaust hole is formed in the cup side wall; the heat conductor covers the opening and is provided with an air inlet hole which is communicated with the heating cavity and faces the cup bottom wall; the heating body is arranged on the side, away from the cup body, of the heat conductor, and an air inlet channel communicating the air inlet with the outside is formed between the heating body and the heat conductor. By means of the arrangement, the heating device is applied to the electronic hookah, heated airflow enters the heating cavity, circulating hot airflow is formed in the heating cavity, the whole aerosol matrix is evenly heated and baked, the aerosol matrix and the heating body are isolated through the heat conductor, and cleanliness and normal heating of the heating body are guaranteed; the electronic hookah solves the problems that in the prior art, an aerosol substrate is heated unevenly by a heating body in the electronic hookah, and the aerosol substrate is prone to being adhered to the heating body.

Description

Technical Field

[0001] The present application relates to the technical field of electronic atomization, and in particular to a heating device and an electronic hookah. Background Art

[0002] Hookah is an atomizer device that atomizes tobacco products and then filters them through water or other liquids for inhalation. Tobacco products suitable for hookah are usually solid aerosol matrices, such as tobacco paste, which generally have no fluidity or basically no fluidity. Currently, the atomization method of aerosol matrices is generally achieved by heating with charcoal.

[0003] The charcoal heating method cannot control the heating temperature, which may cause the smoke to burn due to excessively high local temperatures. At the same time, the charcoal may also release harmful substances such as carbon monoxide during the baking process, causing the smoke of the hookah to be polluted. In addition, the charcoal baking method requires frequent replacement of charcoal, which is cumbersome and inconvenient to operate. Therefore, electronic hookahs have appeared in the relevant technology, which use electronically heated heating elements to bake the aerosol matrix. However, in actual applications, the baking of the aerosol matrix also has the problem of local overheating and uneven baking. Moreover, the heating element is in direct contact with the aerosol matrix and is also very easy to stick to the aerosol matrix, which affects the heating of the heating element and causes the aerosol matrix to burn and is difficult to clean. Utility Model Content

[0004] In view of this, the present application provides a heating device and an electronic hookah to solve the problem in the prior art that the heating element in the electronic hookah heats the aerosol matrix unevenly and the aerosol matrix is ​​easily adhered to the heating element.

[0005] In order to achieve the above objectives, this application provides the following technical solutions:

[0006] A heating device, comprising:

[0007] The cup body comprises a cup bottom wall and a cup side wall, wherein the cup bottom wall and the cup side wall enclose a heating cavity with an opening, the cup bottom wall is closed and the cup side wall is provided with an exhaust hole;

[0008] A heat conductor, covering the opening and provided with an air inlet hole, wherein the air inlet hole is connected with the heating chamber and faces the bottom wall of the cup;

[0009] The heating element is arranged on a side of the heat conductor away from the cup body, and an air inlet passage connecting the air inlet hole with the outside is formed between the heating element and the heat conductor.

[0010] Optionally, an air inlet groove is formed on a surface of the heat conductor facing the heating element, the air inlet hole is located in the air inlet groove, and the heating element is attached to the heat conductor to form the air inlet channel in the air inlet groove.

[0011] Optionally, a plurality of the air inlet grooves are provided and all extend from the edge of the heat conductor to the center of the heat conductor, and each of the air inlet grooves is provided with the air inlet hole.

[0012] Optionally, the air inlet hole is located at the center of the heat conductor or close to the center of the heat conductor.

[0013] Optionally, the flow area of ​​the air inlet groove is greater than or equal to the flow area of ​​the air inlet hole.

[0014] Optionally, a confluence groove is provided at the center of the heat conductor, and all the air inlet grooves are connected to the confluence groove;

[0015] and / or, the edge of the heating element is located inside the edge of the heat conductor, so that the air inlet groove is partially located outside the heating element;

[0016] And / or, the air inlet groove passes through the edge of the heat conductor.

[0017] Optionally, the cup bottom wall and the cup side wall are connected via a guide arc surface.

[0018] Optionally, it also includes a shell mounted on the outside of the cup body, the heat conductor and the heating element, the bottom of the shell is provided with an air outlet, and an exhaust channel connecting the exhaust hole and the air outlet is formed between the inner side surface of the shell and the side wall of the cup.

[0019] Optionally, it further comprises a control box electrically connected to the heating element, wherein the control box is arranged on a side of the heating element away from the heat conductor.

[0020] Optionally, a heat insulating member is provided between the control box and the heating element.

[0021] Optionally, a head cover is further included, wherein the head cover is connected between the control box and the shell, and an air intake gap is formed between the head cover and the shell, and the air intake gap connects the air intake channel and the outside.

[0022] An electronic hookah comprises a hookah and any one of the above-mentioned heating devices.

[0023] The heating device provided in the present application includes a cup body, a heat conductor and a heating element; the cup body includes a cup bottom wall and a cup side wall, and the cup bottom wall and the cup side wall form a heating cavity with an opening, the cup bottom wall is closed and the cup side wall is provided with an exhaust hole; the heat conductor covers the opening and is provided with an air inlet hole, the air inlet hole is connected to the heating cavity and faces the cup bottom wall; the heating element is arranged on the side of the heat conductor away from the cup body, and an air inlet channel connecting the air inlet hole and the outside is formed between the heating element and the heat conductor. In this way, the heating device is applied to the electronic hookah. Through the user's inhalation action, an intake airflow is formed. Before the airflow enters the heating chamber, it passes through the air intake channel between the heat conductor and the heating element to be heated by the heating element. The heated airflow enters the heating chamber to bake the aerosol matrix placed in the heating chamber. After the intake airflow enters the cup body through the air intake hole, it is shot toward the bottom wall of the cup. Since the bottom wall of the cup is closed, the airflow colliding with the bottom wall of the cup will diffuse and form a circulating hot airflow in the heating chamber. At the same time, the heat conductor is affected by the hot airflow in the air intake channel and the thermal radiation of the heating element, which also heats and bakes the aerosol matrix in the heating chamber. The aerosol matrix as a whole is evenly heated and baked, and the aerosol formed by atomization is finally discharged through the exhaust hole on the side wall of the cup with the exhaust airflow. Moreover, the heat conductor isolates the aerosol matrix and the heating element, ensuring the cleanliness and normal heating of the heating element, thereby solving the problem of uneven heating of the aerosol matrix by the heating element in the electronic hookah and the easy adhesion of the aerosol matrix to the heating element in the prior art. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] In order to more clearly illustrate the embodiments of the present application 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 embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on the provided drawings without paying any creative work.

[0025] Figure 1 A schematic diagram of the explosion structure of the heating device provided in an embodiment of the present application;

[0026] Figure 2 A schematic cross-sectional view of the assembly of a heating device provided in an embodiment of the present application;

[0027] Figure 3 A schematic diagram of the disassembled structure of the cup body, the heat conductor and the heating element provided in the embodiment of the present application;

[0028] Figure 4 A schematic diagram of the assembly structure of the cup body, the heat conductor and the heating element provided in the embodiment of the present application;

[0029] Figure 5 for Figure 4 A cross-sectional schematic diagram of

[0030] Figure 6 A schematic diagram of the back side of the heat conductor and the heat generating element provided in the embodiment of the present application;

[0031] Figure 7 A schematic diagram of the structure of a head cover provided in an embodiment of the present application;

[0032] Figure 8 A schematic cross-sectional view of the assembly of the head cover and the housing provided in an embodiment of the present application.

[0033] exist Figure 1-Figure 8 middle:

[0034] 1. cup body; 2. heat conductor; 3. heating element; 4. outer shell; 5. control box; 6. first heat insulation member; 7. second heat insulation member; 8. head cover;

[0035] 101. exhaust hole; 102. outer flange;

[0036] 201, air inlet hole; 202, air inlet groove; 203, confluence groove; 204, outer ring portion;

[0037] 401, air outlet;

[0038] 801. Convex strips. DETAILED DESCRIPTION

[0039] The following will be combined with the drawings in the embodiments of the present application to clearly and completely describe the technical solutions in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of this application.

[0040] like Figure 1-Figure 6 As shown, the embodiment of the present application provides a heating device suitable for electronic hookah, including a cup body 1, a heat conductor 2 and a heating element 3; the cup body 1 includes a cup bottom wall and a cup side wall, the cup side wall is arranged around the cup bottom wall, and the cup bottom wall and the cup side wall enclose a heating cavity with an opening, the cup bottom wall is closed and the cup side wall is provided with an exhaust hole 101; the heat conductor 2 covers the opening and is provided with an air inlet 201, the air inlet 201 is connected to the heating cavity and faces the cup bottom wall; the heating element 3 can generate heat when powered on, and the heating element 3 is arranged on the side of the heat conductor 2 away from the cup body 1, and an air inlet channel connecting the air inlet 201 with the outside is formed between the heating element 3 and the heat conductor 2. It should be noted that the air intake and exhaust occur through the suction action of the user in the process of using the electronic hookah.

[0041] With such a configuration, the heating device is applied to the electronic hookah, and an intake airflow is formed through the user's inhalation action. Before the airflow enters the heating chamber, it passes through the intake channel between the heat conductor 2 and the heating element 3, and is heated by the heating element 3. The heated airflow enters the heating chamber, so that the aerosol matrix placed in the heating chamber is baked. After the intake airflow enters the cup body 1 through the air inlet hole 201, it is injected toward the bottom wall of the cup. Since the bottom wall of the cup is closed, the airflow that collides with the bottom wall of the cup will diffuse and form a circulating hot airflow in the heating chamber. At the same time, the heat conductor 2 is affected by the hot airflow in the intake channel and the heating element 3. The double influence of heat radiation also heats and bakes the aerosol matrix in the heating chamber. The aerosol matrix as a whole is evenly heated and baked, and the aerosol matrix is ​​evenly and fully stimulated to achieve efficient atomization. Finally, the aerosol formed by atomization is discharged with the exhaust airflow through the exhaust hole 101 on the side wall of the cup. Moreover, the heat conductor 2 isolates the aerosol matrix and the heating element 3, ensuring the cleanliness and normal heating of the heating element 3. The aerosol matrix will not become sticky, and the cup body 1 is also easy to clean, which solves the problem of uneven heating of the aerosol matrix by the heating element 3 in the electronic hookah and the easy adhesion of the aerosol matrix to the heating element 3 in the prior art.

[0042] Preferably, the exhaust holes 101 on the side wall of the cup are provided in plurality and are evenly distributed on the side wall of the cup in a honeycomb hole shape.

[0043] Regarding how the air intake channel is specifically formed, in a specific embodiment, an air intake groove 202 is opened on the surface of the heat conductor 2 facing the heating element 3, the air intake hole 201 is located in the air intake groove 202, and the heating element 3 is attached to the heat conductor 2 to form an air intake channel in the air intake groove 202.

[0044] With such arrangement, a partial loss on the surface of the heat conductor 2 forms an air intake channel, which is easy to process and realize. There is both surface contact and air intake channel between the heating element 3 and the heat conductor 2. This heats the heat conductor 2 while also heating the intake air flow, and also makes the heat radiation effect of the heat conductor 2 on the heating cavity better, so that the heat of the heating element 3 can be more fully applied, providing good baking conditions for the heating cavity.

[0045] Of course, in addition to the above-mentioned implementation of the air inlet groove 202, it is also feasible that the heating element 3 is provided with fins on the side facing the heat conductor 2, and the air inlet channel is supported by the fins.

[0046] In other embodiments, a groove, a protrusion or the like may be provided on the side of the heating element 3 facing the heat conductor 2 to cooperate with the heat conductor 2 to form the above-mentioned air inlet passage.

[0047] In a more specific embodiment, the air inlet groove 202 is strip-shaped, a plurality of air inlet grooves 202 are provided and all extend from the edge of the heat conductor 2 to the center of the heat conductor 2 , and each air inlet groove 202 is provided with an air inlet hole 201 .

[0048] With such arrangement, the distribution path of the air inlet grooves 202 fully utilizes the area provided by the heat conductor 2, the heating area of ​​the airflow is large, and air is inletted at multiple locations, thereby enhancing the airflow circulation effect in the heating chamber.

[0049] Furthermore, the heat conductor 2 may be configured to be in a pancake shape, that is, the air inlet grooves 202 are distributed radially, and all the air inlet grooves 202 are preferably evenly distributed to form an array distribution shape surrounding the center of the heat conductor 2 .

[0050] Of course, in addition to the above-mentioned manner, it is also feasible to arrange all the air intake grooves 202 in a criss-cross manner.

[0051] In some other embodiments, the air intake groove 202 can also be set to a curved shape, such as an S-shape or a spiral shape, to increase the air flow path of the air intake channel, which is beneficial to improve the heat exchange between the heat conductor 2 and the heating body 3 and the intake airflow, increase the heating time of the intake airflow, and thus increase the temperature of the intake airflow.

[0052] In a preferred embodiment, the air inlet 201 is located in the middle of the heat conductor 2, specifically, the center of the heat conductor 2 or close to the center of the heat conductor 2. In particular, when the air inlet 201 is located in the center of the heat conductor 2 or close to the center of the heat conductor 2, and each air inlet groove 202 is provided with an air inlet 201, the air inlet 201 is located in the air inlet groove 202 close to the center of the heat conductor 2. In this way, since the exhaust hole 101 is located on the side wall of the cup, the air inlet 201 enters the heating chamber from the center of the heat conductor 2, which is conducive to the hot air flow to be fully discharged from the exhaust hole 101 in the heating chamber, and further optimizes the heating and baking effect in the heating chamber.

[0053] In another preferred embodiment, the flow area of ​​the air inlet groove 202 is greater than or equal to the flow area of ​​the air inlet hole 201, and the flow area of ​​the air inlet groove 202 is also the cross-sectional area of ​​the air inlet groove 202 perpendicular to the air inlet direction. In this way, the area of ​​the air inlet hole 201 is small, which can produce a retention effect on the airflow in the air inlet groove 202, and can ensure that the airflow is fully heated between the heat conductor 2 and the heating element 3 before passing through the air inlet hole 201, further optimizing the heating and baking effect in the heating chamber.

[0054] In addition, in addition to the above-mentioned manner of providing the air inlet hole 201 at a position close to the center of the heat conductor 2 of the air inlet groove 202 , it is also feasible to provide a plurality of air inlet holes 201 arranged along the extension direction of the air inlet groove 202 in the air inlet groove 202 .

[0055] Regarding more structural details between the heat conductor 2 and the heating element 3, in a more specific embodiment, a confluence groove 203 is provided at the center of the heat conductor 2, and all the air inlet grooves 202 are connected to the confluence groove 203, so that the connectivity between the air inlet grooves 202 is strong, which can bring a smoother suction experience to the user;

[0056] And / or, the edge of the heating element 3 is located inside the edge of the heat conductor 2, so that the air inlet groove 202 is partially located outside the heating element 3, so that the area of ​​the heat conductor 2 is larger than the area of ​​the heating element 3, which is conducive to sufficient heating of the heat conductor 2, and the air inlet groove 202 is partially exposed outside the heating element 3, and the air inlet area is large, which can bring a smoother inhalation experience to the user;

[0057] And / or, the air inlet groove 202 passes through the edge of the heat conductor 2, which is conducive to multi-directional air intake in the air inlet groove 202, and can bring a smoother inhalation experience to the user.

[0058] In another preferred embodiment, the bottom wall of the cup and the side wall of the cup are connected by a guide arc surface. Such an arrangement can enhance the airflow circulation effect in the heating chamber.

[0059] In a more specific embodiment, the heating device also includes an outer shell 4 which is mounted on the outside of the cup body 1, the heat conductor 2 and the heating element 3. An air outlet 401 is provided at the bottom of the outer shell 4. An exhaust channel connecting the exhaust hole 101 and the air outlet 401 is formed between the inner side surface of the outer shell 4 and the side wall of the cup.

[0060] With such arrangement, the shell 4 integrates and protects the internal structures, and the shell 4 integrates the airflow discharged from the exhaust hole 101, and discharges it from the air outlet 401 in a concentrated manner, which is beneficial to the supporting use and installation of the heating device in various electronic hookahs; moreover, since the heating device continuously bakes the aerosol matrix, the external temperature of the cup body 1 is very high, and the insulating effect of the shell 4 can prevent the user from the risk of burns during use.

[0061] Furthermore, the cup side wall is provided with an outer flange 102 on the outer side of the opening; wherein the outer shell 4 is provided with a step surface supporting the outer flange 102; and / or, the edge of the heat conductor 2 is provided with an outer ring portion 204, the heat conductor 2 extends into the opening, and the outer ring portion 204 is crimped above the outer flange 102.

[0062] With such arrangement, the cup body 1 and the housing 4 , as well as the heat conductor 2 and the cup body 1 , are easy to assemble, and the connection relationship is highly stable after the assembly is completed.

[0063] In a more preferred embodiment, the heating device further comprises a control box 5 electrically connected to the heating element 3 , and the control box 5 is arranged on a side of the heating element 3 away from the heat conductor 2 .

[0064] With such arrangement, the control box 5 integrates the on-off control of the heating element 3 and the function of providing power to the heating element 3, and is located on the other side of the heating element 3, and the overall structure is compact.

[0065] Furthermore, a heat insulating member is provided between the control box 5 and the heating element 3. This arrangement allows the heat of the heating element 3 to be transferred to the heat conducting plate as much as possible, thereby improving the heat utilization rate; moreover, it also prevents the heat of the heating element 3 from being transferred to the control box 5, thereby improving the product quality and user experience.

[0066] In a more specific embodiment, the heating device further comprises a head cover 8, the head cover 8 is connected between the control box 5 and the housing 4, the head cover 8 is separated between the heating element 3 and the control box 5, and an air intake gap is formed between the head cover 8 and the housing 4, and the air intake gap connects the air intake channel and the outside. It can be configured that the head cover 8 partially extends into and is connected to the housing 4, and the head cover 8 is partially provided with a convex strip 801 that abuts against the housing 4, such as Figure 7-Figure 8 As shown, the head cover 8 is partially not in contact with the outer shell 4 in the circumferential direction, thereby forming an air intake gap.

[0067] Such an arrangement facilitates the connection between the control box 5 and the housing 4. The heating device is assembled as a whole to form a single independent structure, which is convenient for users to take, while also taking into account the air intake reservation of the air intake channel. Moreover, the exterior looks like a flat, defect-free surface with a high aesthetics.

[0068] It should be noted that Figure 2 and Figure 5 The arrows in the figure are provided to illustrate the direction of air flow.

[0069] In this way, the heat insulating member between the control box 5 and the heating element 3 may specifically include a first heat insulating member 6 located between the control box 5 and the head cover 8, and a second heat insulating member 7 located between the head cover 8 and the heating element 3. More preferably, except for the side of the heating element 3 in contact with the heat conductor 2, the rest of the positions are covered with the second heat insulating member 7.

[0070] Based on the above-mentioned heating device, the embodiment of the present application further provides an electronic hookah, which includes a hookah and the above-mentioned heating device, and the heating device is installed on the top of the hookah. Since the electronic hookah has the above-mentioned heating device, the beneficial effects of the electronic hookah brought by the heating device can be found in the above content, which will not be repeated here.

[0071] The basic principles of the present application are described above in conjunction with specific embodiments. However, it should be noted that the advantages, strengths, effects, etc. mentioned in the present application are only examples and not limitations, and it cannot be considered that these advantages, strengths, effects, etc. are required by each embodiment of the present application. In addition, the specific details disclosed above are only for the purpose of illustration and ease of understanding, not for limitation, and the above details do not limit the present application to being implemented by adopting the above specific details.

[0072] The block diagrams of the devices, apparatuses, equipment, and systems involved in this application are only illustrative examples and are not intended to require or imply that they must be connected, arranged, and configured in the manner shown in the block diagram. As will be appreciated by those skilled in the art, these devices, apparatuses, equipment, and systems can be connected, arranged, and configured in any manner. Words such as "including", "comprising", "having", etc. are open words, referring to "including but not limited to", and can be used interchangeably with them. The words "or" and "and" used here refer to the words "and / or" and can be used interchangeably with them, unless the context clearly indicates otherwise. The words "such as" used here refer to the phrase "such as but not limited to", and can be used interchangeably with them.

[0073] It should also be noted that in the apparatus, device and method of the present application, each component or each step can be decomposed and / or recombined. Such decomposition and / or recombination should be regarded as equivalent solutions of the present application.

[0074] The above description of the disclosed aspects is provided to enable any person skilled in the art to make or use the present application. Various modifications to these aspects will be readily apparent to those skilled in the art, and the general principles defined herein may be applied to other aspects without departing from the scope of the present application. Therefore, the present application is not intended to be limited to the aspects shown herein, but rather to the widest scope consistent with the principles and novel features disclosed herein.

[0075] It should be understood that the qualifiers "first", "third", "fourth", "fifth" and "sixth" used in the description of the embodiments of the present application are only used to more clearly explain the technical solutions and cannot be used to limit the scope of protection of the present application.

[0076] The above description has been given for the purpose of illustration and description. In addition, this description is not intended to limit the embodiments of the present application to the forms disclosed herein. Although multiple example aspects and embodiments have been discussed above, those skilled in the art will recognize certain variations, modifications, changes, additions and sub-combinations thereof.

Claims

1. A heating device, characterized in that: include: The cup body (1) comprises a cup bottom wall and a cup side wall, wherein the cup bottom wall and the cup side wall enclose a heating chamber with an open opening, the cup bottom wall is closed and the cup side wall is provided with an exhaust hole (101); A heat conductor (2), covering the opening and provided with an air inlet hole (201), wherein the air inlet hole (201) is communicated with the heating chamber and faces the bottom wall of the cup; The heating element (3) is arranged on a side of the heat conductor (2) facing away from the cup body (1), and an air intake passage connecting the air intake hole (201) and the outside is formed between the heating element (3) and the heat conductor (2).

2. The heating device according to claim 1, characterized in that An air intake groove (202) is provided on the surface of the heat conductor (2) facing the heating element (3); the air intake hole (201) is located in the air intake groove (202); and the heating element (3) is attached to the heat conductor (2) to form the air intake channel in the air intake groove (202).

3. The heating device according to claim 2, characterized in that: The air inlet grooves (202) are provided in plurality and all extend from the edge of the heat conductor (2) towards the center of the heat conductor (2), and each of the air inlet grooves (202) is provided with the air inlet hole (201).

4. The heating device according to any one of claims 1 to 3, characterized in that: The air inlet hole (201) is located at the center of the heat conductor (2) or close to the center of the heat conductor (2).

5. The heating device according to any one of claims 2 or 3, characterized in that: The flow area of ​​the air inlet groove (202) is greater than or equal to the flow area of ​​the air inlet hole (201).

6. The heating device according to claim 3, characterized in that: A confluence groove (203) is provided at the center of the heat conductor (2), and all of the air inlet grooves (202) are in communication with the confluence groove (203); And / or, the edge of the heating element (3) is located inside the edge of the heat conductor (2), so that the air inlet groove (202) is partially located outside the heating element (3); And / or, the air inlet groove (202) passes through the edge of the heat conductor (2).

7. The heating device according to claim 1, characterized in that: The inner side surface of the cup bottom wall and the inner side surface of the cup side wall are connected via a flow guiding arc surface.

8. The heating device according to claim 1, characterized in that It also includes an outer shell (4) which is sleeved on the outside of the cup body (1), the heat conductor (2) and the heating element (3); an air outlet (401) is provided at the bottom of the outer shell (4); and an exhaust channel connecting the exhaust hole (101) and the air outlet (401) is formed between the inner side surface of the outer shell (4) and the side wall of the cup.

9. The heating device according to claim 8, characterized in that: It also comprises a control box (5) electrically connected to the heating element (3), wherein the control box (5) is arranged on a side of the heating element (3) facing away from the heat conductor (2).

10. The heating device according to claim 9, characterized in that A heat insulating member is provided between the control box (5) and the heating element (3).

11. The heating device according to claim 9, characterized in that It also includes a head cover (8), which is connected between the control box (5) and the outer shell (4), and an air intake gap is formed between the head cover (8) and the outer shell (4), and the air intake gap connects the air intake channel and the outside.

12. An electronic hookah, characterized in that: The invention comprises a hookah and a heating device as claimed in any one of claims 1 to 11.

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