JPS63501311A - Heating device with heat storage block - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

[Detailed description of the invention] Heating with heat storage block and/or cooking equipment The present invention relates to a thermal storage block surrounded by insulation, a heating element within the thermal storage block, and in some cases Therefore, such as cooking plates, openers, radiators, and cooking utensils embedded in the insulation material, at least one heat consumer, and exiting the heat storage block and passing through the insulation. It has a heat transfer element that communicates with the heat consuming device, where the heat transfer output of the heat transfer element is connected to the control unit. The present invention relates to heating and/or cooking devices that can be controlled by materials.

The invention is based on known heating and/or cooking devices (patent of the Federal Republic of Germany) Application Publication No. 1141063) is an electrically heated heat storage range. This heating element has a heating coil as an electric heating element, and this heating element should be made as cheap as possible. The generated nighttime current is used to heat the thermal storage block. This heating and/or or in cooking appliances, the heat transfer element consists of a material with good thermal conductivity, especially copper. It can be a vertically movably guided tube or a suitable pin. The heat transfer output of the heat transfer element is , here it is controlled as follows. i.e. heat transport elements and heat dissipators or Changing the effective heat transfer area between the heat consuming device and the appropriate heat transfer frame. heat at that time The transfer frame forms a control member with the corresponding end of the heat transfer element. This system The control member is equipped with a mechanical control device in the form of a sliding drive acting perpendicularly to the heat transfer element. Comes with a stand.

Further heating and/or cooking devices (DE 294 328) The above-mentioned heating and/or cooking device also operates in the same manner as the known heating and/or cooking device. heat here The conveying element is generally constructed as a solid copper rod, but the control It is disposed within an insulated rotating frame as a material and has a valve section. Rotate the valve part By increasing the effective heat transfer area between the individual parts of the heat transfer element from 0% to 1 It is steplessly variable up to 00%.

A rotary knob is provided here as a control device.

Finally, in a heating and/or cooking device with a heat storage block, a heat transfer element and The use of so-called heat pipes has been known for a long time (Deutsch Federal Republic of Tunica Patent No. 3226782). Such known heating and/or or in cooking equipment, heat pipes are used on the one hand to collect solar heat for heat absorption; on the other hand, and inserted into the heat storage block as a heating element on the other hand. There is. Another heat pipe exits the heat storage block, here in the form of a cooking plate. Leads to heat dissipation equipment. Raise and tilt the entire heating and/or cooking device. By adjusting the heat pipe to the desired gradient, Heat transfer output can be controlled. This control technology can be used as a heat pipe with both ends closed. A tube made of suitable material is used, and a small portion of the tube is filled with liquid refrigerant. We are taking this into consideration. When the heat pipe is arranged with the specified minimum gradient, the lower end Heat is transported from the top to the higher end in the following manner. i.e. the refrigerant is at the bottom hot end begins to evaporate at the upper cold end, the resulting vapor rises and heats up at the upper cold end. It condenses while releasing. The condensate returns to the lower end of the heat pipe and transports the heat. A loop is established. of heat in the opposite direction, thus from the top end of the heat pipe to the bottom end. Transport is not possible, so from a thermotechnical point of view the heat pipe acts as a check valve. do.

Known heating and/or cooking equipment with temperature-controllable general-purpose heat consuming devices The object of the present invention is to improve efficiency and simplify controllability. It is the foundation.

The heating and/or cooking device according to the present invention that solves the above problems has the following characteristics. have symptoms. In other words, the heat transport element is a heat pipe, and the heat upwards from the thermal block toward the heat consumer, preferably guided almost vertically. , and the flow of vapor/liquid within the heat pipe is controllable by the control member.

The efficiency of heat transport elements constructed as steel tubes or copper rods known from the prior art is quite optimal. This heat transfer element also allows heat transfer in both directions. However, according to the present invention, a heat pipe can be used instead of this heat transport element. It will be done. Furthermore, according to the invention, within the framework of a heating and/or cooking device as described above, In order to be able to use this heat pipe meaningfully in The previously known control ability by changing the gradient of is abandoned. heat pipe gradient Such changes are difficult to achieve in thermal storage blocks or insulation. However, the original According to Akira, the controllability of the heat transfer output of a heat pipe can be achieved by controlling the heat It turns out that this is possible by controlling the flow of vapor/liquid in the pipe. . According to this procedure, it is possible to adapt the heat pipe to a given application as a heat transport element. I can do it. Therefore, at the same time the high efficiency of the heat pipe is utilized and the thermal engineering reverse The characteristics of stop valves are also utilized.

There are many possibilities for configuring and improving the teaching of the invention as basically explained above.

These possibilities are explained in more detail in the drawings in connection with the following description of advantageous embodiments. . In the figure, Brief description of the drawing FIG. 1 schematically shows, in cross section, an embodiment of a heating and/or cooking device according to the invention. show, FIG. 2 shows a heat pump with control valve for the heating and/or cooking device of FIG. schematically shows the type in an enlarged view, FIG. 3 shows a further embodiment of a heat pipe with a control valve in a diagram corresponding to FIG. And FIG. 4 shows a further embodiment of the heating and/or cooking device in a diagram corresponding to FIG. death, FIG. 5 is a highly schematic enlarged view of the lower area of the heat pipe of the advantageous embodiment; and FIG. 6 shows a third embodiment of the heating and/or cooking device compared to FIG. It is shown in a similar diagram.

The heating and/or cooking device first has a heat storage block 2 surrounded by an insulation material 1 Ru. As the storage medium for the heat storage block 2, solids, which are well known as heat storage media, can therefore be used. As well as ceramics, heat storage bricks, aluminum, cast iron, etc., suitable liquids, suitable Salts and the like that have a melting point become a problem. In the preferred embodiment shown, as storage medium Salt mixtures with suitable melting points are used. As insulation material 1, all types of The usual insulation materials become an issue, and these insulation materials are of course a significant part of the cooking equipment. It must be able to withstand the temperature inside the heat storage block. Further heating and/or conditioning The heating device has a heating element 3 in a heat storage block 2. This heating element 3 is an electrical Although air heating coils etc. can be used, in the preferred embodiment shown a heat pipe is used. The upper end of the heat pipe is used, and the heat pipe is otherwise It is connected to the storage and collection surface 4. This is well known, so regarding that point, Reference is made to the prior art publication (German Patent No. 32 26 782). That's fine.

FIG. 1 shows that the preferred embodiment of the cooking device shown here has two heat-consuming devices in the form of a cooking plate. 5, indicating that both of these cooking plates are embedded in the eutectoid heating material 1. There is. Of course instead of the cooking board as the heat consuming device 5, open, in some cases Separate cooking utensils and therefore the elements that combine cooking plates and utensils are also problematic. According to the present invention A heating and/or cooking device that, when configured as a heating device, is a heat consuming device. It is also possible to have a heat sink or the like. Regarding this as well, the following All you have to do is refer to the next technology.

A heat transport element 6 comes out from the heat storage block 2, and this heat transport element passes through a heat insulating material. and leads to the heat consuming device 5. In the embodiment shown in FIG. In order to embed the heat consuming device 5 in the heat insulating material 1, the heat storage block 2 and the insulator are completely separated. It is passed through the heat material 1.

The heat transfer output of the heat transfer element 6 can be controlled by a control member 7, which is mechanically constructed in the embodiment shown here.

What is important at this time is that the heat transport element 6 is a heat pipe; In contrast, in the prior art, the heat transfer element 6 was a copper tube or a copper rod. heat pipe has significantly better efficiency than copper rods in terms of heat transfer output and also Scientifically, it acts as a check valve, that is, it only allows heat to be transported from the bottom to the top. It has the following advantages. As a result, the heating and/or cooking device according to the invention The vibro rises from the heat storage block 2 towards the heat consuming device 5 and advantageously stays in place. In the illustrated embodiment, the guide is approximately vertical.

An optimum heat transfer output of the heat vibro is therefore guaranteed. By the control member 7 The flow of vapor/liquid in the heat vibro can be controlled by Without changing the gradient of the heat vibro, the heat transport output of the heat vibro is also controlled.

Figures 1 and 2 basically show a normal heat vibro as a heat transfer element. Therefore, it is possible to create a heat bisher with opposing vapor/liquid flows within one space. Figure 3 shows another advantageous embodiment, here The Heat Vibro is configured with two passages, meaning that only the upward steam flow is allowed. a forward passageway 8 allowing, and approximately parallel to and downwardly directed liquid flow thereto; It has a reverse passage 9 that allows only this. According to this structure, in a mechanical sense loop is realized, which further increases the efficiency of the entire device and increases the control ability. Improve. Realizing only the steam flow in the forward passage 8 and the liquid flow in the reverse passage 9 is , can be carried out by suitable check valves 10.11, baffles, filters, etc. . In addition, Fig. 3 shows that a heat vibro with a two-pass configuration has liquid in its lower part. a lowered collection region 12 for the refrigerant, followed by a rising region 13 for the vapor. It shows that it has. Furthermore, in the upper range of the heat vibro with a two-passage configuration, The highest point is above the forward passage 8, and from there it immediately goes towards the reverse passage 9. It is important that the heat pipe 6 is lowered. Finally, the example shown here In this case, the control member 7 is arranged in the forward passage 8 and here also only in the forward passage 8. It is important to be there. This means that the flow in the forward passage 8 and the reverse passage 9 is Since the direction of is constant, it is sufficient to control the steam flow in the forward passage 8. This is taken into consideration.

In another embodiment of the invention shown in FIG. The air flow and the downward liquid flow in the reverse passage 9 are divided by a check valve or the like. On the other hand, the highest point of the heat vibro is placed above the forward passage 8. so that the heat vibro is immediately lowered from here toward the reverse direction passage 9. On the other hand, only the flow cross-section of the reverse channel 9 is particularly small. carried out by. To be precise, in the illustrated embodiment the flow in the reverse passage 9 is The cross-sectional area of the passageway is small like that of a capillary tube, that is, the diameter of the reverse passage 9 is approximately 3 mm. Ru. In reality, this is always the case, but if there is liquid flowing backwards in the reverse direction passage 9, Reverse passage 9 effectively prevents upward vapor flow.

In contrast, the heat vibro is cleverly guided through the highest point on the forward passage 8. If so, the liquid always flows down into the reverse passage 9.

In addition, FIG. An advantageous embodiment of the invention is shown in which the splitting of the ibro takes place for the first time directly below the insulation 1. are doing. This is also shown in FIG. 5, which is enlarged somewhat by 51 degrees.

The lower end of the heat vibrator shown in FIG. 40m, Narube (Habo 30m in diameter, the forward passage 8 exiting upward is Narube) It has a diameter of ow. All parts of the Heat Vibro are made of copper and are 151 The water filling part is inside the heat vibro 0 in the embodiment shown here. .

Furthermore, FIG. 4 now shows that the control member 7 is not placed in the forward passage 8, but 1 shows an advantageous embodiment of the invention as arranged in a counterchannel 9; As a result, In the embodiment shown here, the control member 7 is in any case as small as possible and therefore safe. can be configured to any value. In addition, this structure has the following advantages: In other words, heat storage The lock 2 is hot but releases no or very little heat through the heat dissipator 5. If not, all the liquid will be in the top range of the heat vibro and therefore in the coldest one. The control member 7 prevents the particles from returning downward in the reverse passage 9. thwarted. Therefore, in this state, the heat vibro receives only a small internal pressure. The high internal pressure that is created inside the heat vibro due to the evaporation of the liquid is actually This only occurs during operation and therefore when heat is dissipated via the heat consuming device 5.

FIGS. 1 to 6 show the following in connection. That is, the advantageous aspects of the present invention According to the teaching, the control member 7 is arranged directly below the heat consuming device 5, preferably still with the insulation 1. located within. This is due to the fact that the control member 7 is placed inside the heat storage block 2. As a result, in some cases, a flow of °C leakage heat may occur through the control member 7. I am considering it.

In Fig. 1, the insulation material 1 is surrounded on the other hand by a casing made of a plate or the like. However, in Figure 4, the insulation material 1 is configured as an integrated insulation material, The outside is therefore so resistant that no additional casing is required.

FIGS. 2 and 3 show that in the embodiment shown here, the direction is towards the heat consuming device 5. It shows that the end of the heated vibro is guided through loop 15. .

As a result of the guidance of the heat vibro in the loop 15, better heat is generated in the heat dissipating device 5. Dispersion takes place. On the contrary, the formation of a loop 15 at the end of the heat vibro In addition, there is a type of electric cooking plate which is well known especially for high speed heating. heating coils. FIG. 1 shows an alternative heat consuming device 5. It shows the hopper-like spread of the end of the heat vibro attached facing towards. Here, as it were, the end of the heat vibro itself is connected to the heat consuming device 5, and therefore here to the It forms a board. At that time, the end of the heat vibro, which has expanded into a hopper shape, Protective cover with resistance to shocks and loads, or with similar resistance has.

Furthermore, as shown in FIGS. 2 to 4, the associated heater facing towards the heat consuming device 5 It is noted that the ends of the heat sinks are integrated into the plate 16 forming the heat consuming device 5 itself. , which is particularly advantageous with respect to efficiency. In the advantageous embodiments shown in FIGS. 2 to 4, The lever plate 16 is made of aluminum, and the end of the heat vibro is attached to this plate. It is embedded and cast in 16. In addition, heat vibro In order to improve the heat transfer from the heat dissipating device 5 to It's okay.

According to the advantageous teaching of the present invention, the heat vibro is made of copper as previously described. . According to experiments, copper is completely brazed with aluminum, and aluminum plate soldering It turns out that it can be mounted on cast iron.

FIG. 5 also shows the special feature of the invention in the lower region of the heat vibro. why This is because the coil 6a that promotes the return of the liquid is arranged on the inner wall. Ru. Thereby a return aid is provided for the liquid, and of course this aid is accompanied by yet another It may be provided by any method.

In addition, FIG. 4 shows that heat vibro is present in the area inside the heat storage block 2. It shows that it is coupled to a heat absorbing plate 6b having a large area. illustrated here In the embodiment, the heat absorption plate 6b has a hole with a diameter of about 10 mm and is placed inside the heat storage block 2. It is constructed as an aluminum plate arranged diagonally. One of the heat absorbing plates 6b Generally speaking, the end can be directly connected to a heat pipe etc. that supplies heat to the heat storage block 2. is shown.

Another embodiment of the heating and/or cooking device according to the invention is shown in FIG. A special embodiment of the heat consuming device 5 is shown, namely a cooking device with an integrated pan. One heat dissipation device 5 is shown which is constructed in the shape of a tool. What is important at this time is A unit in which the heat consumption device 5 is separated from the heat storage block 2 by a heat insulating material l. and is connected to the heat storage block 2 via a heat vibro. That is what we are doing. Therefore, in the embodiment illustrated here, the heat vibro is integrated. It has a combined insulation material 17, so that the section between the insulation material 1 and the heat consumer 5 is Try to prevent heat loss.

The heat consumer 5 itself likewise has a heat insulating material 18 . In addition, Figure 6 shows the thermal storage block. The rack 2 including the heat insulating material 1 has an opening 19 into which the heat vibro is inserted, and Particularly in that a vibro can be selectively inserted into this opening 19. 1 shows an advantageous embodiment. In the similarly illustrated embodiment, here the cooking utensil is The heat dissipating device 5 is configured with an opening 2 for insertion into the end of the heat vibro. has 0. Therefore, the heating and/or cooking device shown here is only a part. It is solvable.

Previously only the control member 7 for the heat transfer output of the heat vibro was described in general. did. How to configure this control member 7 individually is a matter for experts. It is clear from the specialized books. In any case, in the preferred embodiment illustrated here Therefore, the control member 7 can be constructed as a valve and, according to the advantageous teaching of the invention, as a regulating valve. has been completed. Basically, the valve may be configured as an on-off valve; , To achieve the controllable heat transfer output of HeatVibro, special Requires control technical measures. Examples of valves that can be used here are those related to refrigerators. Lejuger: ``Lexicon der Technique'' Volume 16 ``Lexico N der Verferrens Technique J, DVA.

Stuttgart, 1970, p. 398).

The control valve 7, which is basically used as a control member, can be configured like a cock; This corresponds particularly well to rotary knobs as operating elements. However, perhaps ( For heat vibro as a heat transport element, here is a valve that can adjust the flow cross section. It may be particularly advantageous to provide a section 21. For example, as shown in Figures 1 to 3. In addition, since the wall of the heat vibro in the valve section 21 is made of an elastic material, the heat Control of the heat transfer output of the vibro is achieved by e.g. a ring-shaped push on the wall in the valve section 21. This can be done by crushing.

In the embodiments shown in FIGS. 1 to 4, the control of the control member 7 or the control valve 7 is performed mechanically, ie by means of a rotary knob or the like. Therefore, the control section If the material 7 or the control valve 7 is configured appropriately, a special characteristic curve regarding the control characteristics can be obtained. realizable. For example, after initial rapid heating with high heat transfer power, subsequent cooking Therefore, the heat transport output can be reduced. In this regard, as shown in Figure 6, It is particularly advantageous to provide an electric or electronic control device 22 for the control member 7 .

Obviously, the control element 7 or the regulating valve 7 must then be correspondingly controllable. , for example, an electromagnetic machine or an electro-pneumatic control member 7. Can be done. Electrical or electronic control unit 22 offers numerous control technology possibilities. That is important. Here, for example, a temperature sensor in the heat consuming device 5 completes the process. Since it is possible to realize a complete control circuit, it is possible to control the heat transport output of Heat Vibro. Therefore, the heat consuming device 5 is always maintained at the same temperature. For example, extremely rapidly heat to a high temperature and then reduce the temperature for continued cooking for a predetermined period of time. In order to reduce the time associated with the temperature of the heat consumer 5 in conjunction with a known time switch. Special characteristic curves depending on can also be realized. by an electrical or electronic control device. If so, the temperature inside the heat storage block 2 will be determined in relation to the temperature sensor inside the heat storage block 2. It is also possible to take into account the fact that the value has fallen below a certain lower limit. In this case heat The consumer 5 can be "switched off" and/or the heating element 3 can be additionally switched on, e.g. For example, if the heating element 3 is constructed as an electric heating coil, a relatively expensive Additional heating is provided by medium current.

In this case, it may be advantageous to additionally provide the control device 22 with a suitable display of the functions. That's what I found out.

If the control member 7 is configured as a valve, the electric or electronic control device 22 Offers the possibility of opening and closing in a pulsed manner. Such pulse-like opening and closing of the control member 7 , makes it possible to use an on-off valve, even if it cannot be achieved with an on-off valve alone. control member The operating ratio between opening and closing of 7 determines the heat transfer output as a result.

Finally, although not shown in the figures, according to another advantageous teaching of the invention, a heating element and This can be achieved by using a heat pipe leading from a solar collector etc. to a heat storage block. Heat pipes may also have suitable control elements to control the heat transfer output. Ru. By thereby "cutting off" the heating element in the form of a heat pipe, e.g. This makes it easy to prevent overheating of the heat storage block. In particular, a temperature sensor is installed inside the heat storage block. This is an advantageous aspect of the teaching of the invention in connection with electrical or electronic controls equipped with It is the composition.

Country @ U4-4F report fiJM2 Three poa = 0NGB-A-203261308105/80 NoneDE- A-312052027101/83 NoneUS-A-427310016 106/81 Continuation of None1 page 1 Inventor Steuy, Bernd, Federal Republic of Germany, Utahin, 6 Special clothing Showa 63-501311 (8) ,D-4030,Rateigen,8,Scharfense

Claims (1)

[Claims] 1. A thermal storage block surrounded by insulation, a heating element within the thermal storage block, and in some cases small parts such as cooktops, openers, radiators, and cooking utensils that are built into the insulation. at least one heat dissipator, and heat dissipating out of the heat storage block and through the insulation; a heat transfer element in communication with the device, wherein the heat transfer output of the heat transfer element is controlled by the control member. In heating and/or cooking appliances that can be controlled by (6), and the heat pipe (6) connects the heat storage block (2) to the heat consuming device. (5) and is preferably guided approximately vertically, and the control member (7 ) that the flow of vapor/liquid in the heat pipe (6) can be controlled by heating and/or cooking equipment. 2. The heat pipe (6) has a two-pass configuration, i.e. only vapor flow upwards. a forward passageway (8) which is approximately parallel to this and which allows liquid to flow downwards; Claim 1, characterized in that it has a reverse passage (9) that allows only flow. Heating and/or cooking device as described. 3. Steam flow upwards in the forward passage (8) and downward in the reverse passage (9) Suitable check valves (10, 11), baffles, fins, etc. are used to divide the liquid flow into the The heating and/or heating device according to claim 1, characterized in that the or cooking equipment. 4. Steam flow upwards in the forward passage (8) and downward in the reverse passage (9) The end of the heat pipe (6) is placed above the forward passage (8) to split the liquid flow to the A high point is provided, and the heat pipe (6) immediately passes through the opposite direction from this point. (9) and/or of the flow in the reverse passage (9). Claim 2 and optionally 3, characterized in that the cross-sectional area is particularly small. heating and/or cooking equipment. 5. The flow cross-sectional area of the reverse passage (9) is approximately 5 to 9 mm2, preferably approximately 7 m. m2, or the diameter is approximately 2 to 4 mm, preferably approximately 3 mm. 5. The heating and/or cooking device according to claim 4, wherein the heating and/or cooking device has the following characteristics. 6. The division of the heat pipe (6) into a forward passage (8) and a reverse passage (9) is Claims 2 to 5, characterized in that the first time is carried out immediately below the heating element (1). Heating and/or cooking device according to one of the above. 7. characterized in that the control member (7) is arranged in the forward passage (8), Heating and/or cooking device according to one of claims 2 to 6. 8. characterized in that the control member (7) is arranged in the reverse passageway (9), Heating and/or cooking device according to one of claims 2 to 6. 9. The control member (7) is located directly below the heat consumer (5), in particular still within the insulation (1). The heating device according to one of claims 1 to 8, characterized in that: and/or cooking equipment. 10. The end of the associated heat pipe (6) facing towards the heat consumer (5) is looped One of claims 1 to 9, characterized in that it is guided by (15). Heating and/or cooking device according to. 11. The end of the associated heat pipe (6) facing towards the heat consumer (5) is connected to the hopper. Heating according to one of claims 1 to 9, characterized in that it is spread out in the form of a and/or cooking equipment. 12. In particular, the end of the associated heat pipe (6) facing towards the heat consumer (5) It is integrated into the plate (16) forming the heat dissipation device (5) itself, especially if it is made of aluminum. Claim 1 characterized in that it is cast in a plate (16) consisting of: Heating and/or cooking device according to one of items 1 to 11. 13. Claims 1 to 3, characterized in that the heat pipe (6) is made of copper. Heating and/or cooking device according to claim 12. 14. The inner wall of the heat pipe (6) has a coil (6a) etc. that promotes the return of the liquid. Heating according to one of claims 1 to 13, characterized in that: and/or cooking equipment. 15. The heat pipe (6) is located within the heat storage block (2). Please note that it is connected to a heat absorbing plate (6d) etc. that spreads over a large area inside the lock (2). A heating and/or cooking device according to one of claims 1 to 14, characterized in that Place. 16. The heat consuming device (5) is separated from the heat storage block (2) by the insulation material (1) It is configured as a unit formed by Claims 1 to 3 are characterized in that the heat storage block (2) is connected to the heat storage block (2). 16. Heating and/or cooking device according to claim 15. 17. The heat storage block (2), including the insulation material (1), is connected to the heat pipe (6). the heat pipe (6) is selectively opened (19); The heating and/or heating device according to claim 16, characterized in that it is pluggable. cooking equipment. 18. The heat consuming device (5) is configured as a cooking utensil, baking utensil, etc., and is characterized in that it has an opening (20) into which the associated end of the top pipe (6) is inserted; A heating and/or cooking device according to claim 16 or 17. 19. characterized in that the control element is configured as a valve, in particular as a regulating valve (7) A heating and/or cooking device according to one of claims 1 to 18. 20. Claims characterized in that the control valve (7) is configured in the shape of a cock. 20. Heating and/or cooking device according to 19. 21. the heat pipe (6) has a valve section (21) with an adjustable flow cross-sectional area; and in particular that the walls of the heat pipe (6) in the valve section (21) consist of an elastic material. The heating and/or cooking device according to claim 18, characterized in that: 22. An electrical or electronic control device (22) is provided for the control member (7). Heating and/or according to one of claims 1 to 21, characterized in that cooking equipment. 23. A control member configured as a valve can be opened and closed in a pulsed manner by a control device. Heating and/or cooking according to claims 10 and 22, characterized in that Device. 24. Guide the heating element upwards from the solar collector etc. towards the thermal storage block is formed by the upper end of the heat pipe, and for this heat pipe A unique control member for the master transfer force is provided, and the control member controls this heat output. The flow of vapor/liquid in the pipe is controllable and the control member preferably characterized by being located close to the lock, especially in the insulation surrounding the heat storage block A heating and/or cooking device according to one of claims 1 to 23.