Oven using liquid medium for constant-temperature heating

Abstract

The oven comprises an oven body, a baking groove is formed in the upper end face of the oven body, an opening is formed in the lower end of the baking groove, a heat conduction box is arranged on the lower side of the opening, the heat conduction box is filled with heat conduction oil, and the heat conduction box serves as the bottom face of the baking groove to be connected in a sealed mode; a lower heating device used for heating heat conduction oil is arranged on the bottom face side of the heat conduction box, a cooling device extending out of the box body is arranged on one side of the upper surface of the heat conduction box, the cooling device comprises a water tank, a cooling pipe communicated with the water tank, a water inlet pipe and a coil pipe, the lower end of the cooling pipe is communicated with the heat conduction box, and an upper cover capable of sealing and covering the baking groove is connected to the baking groove side. And an upper heating device is arranged in the upper cover. The bottom of the crusty pancake blank can be uniformly heated in the baking process, the cooked wheaten food baked in the mode can be uniformly heated in a constant-temperature state, the cooked cooked wheaten food is soft and free of burnt parts, and the crusty pancake baking machine is very suitable for baking the cooked wheaten food and is particularly suitable for baking traditional cooked wheaten food of minority groups.

Description

Technical Field

[0001] This application relates to an oven, and particularly to an oven that uses liquid medium for constant temperature heating and has uniform heat distribution. Background Art

[0002] Ovens are commonly used equipment for making baked foods. Especially for ethnic minorities in the northwest region, baked foods such as naan bread and baked buns are daily food items.

[0003] Traditional naan bread and baked buns require building a tandoor. The heat source is placed at the bottom of the tandoor, and the naan dough is adhered to the inner sidewall of the tandoor using the stickiness of the dough. Tandoors are mainly built with refractory clay, alkaline earth, and adobe bricks, which have good heat conductivity and uniform heat distribution characteristics. After the naan dough is adhered to the sidewall of the tandoor, the bottom surface of the naan dough is mainly baked at a constant temperature using the relatively low temperature of the sidewall, and this surface is not easily burnt. For the side surface, it is mainly baked at a high temperature using the relatively high temperature of the charcoal fire. Therefore, the naan bread made in the tandoor is very crispy and fragrant. The principle of making baked buns is similar.

[0004] With the increasing requirements for the environment in urban development, the method of baking using charcoal fire is restricted. Therefore, some merchants have changed the heat source from charcoal fire to electric heating. Electric baking generally uses heating tubes for heating, and its main defect is uneven heating. Since there is a certain distance between the heating tubes during arrangement, the temperature within the distance will be lower than that at the heating tubes. When the heat is projected onto the heated surface of the food, the heat distribution is uneven. For baked foods such as naan bread and baked buns, their bottoms are thicker and the upper surfaces are thinner. Therefore, the bottom surface must be heated evenly, and the requirement for heating the upper surface can be reduced, so that the bottom surface can be heated evenly and slowly cooked during the baking process. The above reasons are the main reasons why the taste of baked pasta such as naan bread and baked buns made in an electric heating oven is difficult to reach that of pasta baked in a tandoor.

[0005] After retrieval, no oven designed for baking naan bread and baked buns to solve the defects of the existing technology was found. Summary of the Invention

[0006] This application provides an oven that uses liquid medium for constant temperature heating and can solve the above deficiencies in the existing technology, enabling the bottom surface of the naan dough to be heated evenly.

[0007] The object of the present application is achieved as follows: An oven using liquid medium constant temperature heating includes a box body. A baking groove is provided at the upper end surface of the box body. The lower end of the baking groove is open, and a heat conducting box is arranged below the opening. The heat conducting box is filled with heat conducting oil and is hermetically connected to the bottom surface of the baking groove. A lower heating device for heating the heat conducting oil is arranged on the bottom side of the heat conducting box, and a cooling device extending outside the box body is arranged on one side of the upper surface of the heat conducting box. The cooling device includes a water tank, a cooling pipe, a water inlet pipe, and a coil pipe communicated with the water tank. The lower end of the cooling pipe is communicated with the heat conducting box. An upper cover capable of covering the baking groove is connected to the side of the baking groove, and an upper heating device is installed in the upper cover.

[0008] The cooling device includes a cooling pipe communicated with the heat conducting box. The upper end of the cooling pipe extends out of the box body and is covered with a top cover. An inlet and an outlet are provided on the top cover. The inlet is internally communicated with the water inlet pipe, and the outlet is internally communicated with the return water pipe. A coil pipe is arranged in the cooling pipe. The water inlet of the coil pipe is communicated with the water outlet of the water inlet pipe, and the water outlet of the coil pipe is communicated with the water inlet of the return water pipe. The water inlet of the water inlet pipe is communicated with the water tank.

[0009] The water inlet pipe includes an outer pipe. The upper and lower ends of the outer pipe are respectively connected to the water tank and the cooling pipe. An inner pipe capable of moving up and down is inserted in the outer pipe. Sealing rings are arranged between the upper and lower parts of the outer pipe and the inner pipe. Dynamic seals are formed between the upper and lower parts of the outer pipe and the inner pipe. The water inlet at the upper end of the inner pipe extends into the water tank and is communicated with the water tank. The water outlet at the lower end of the inner pipe is communicated with the water inlet of the coil pipe.

[0010] A sliding groove is provided on the side wall of the outer pipe. A limiting rod is slidably arranged in the sliding groove. A limiting head is arranged at the outer end of the limiting rod, and the inner end is fixedly connected to the inner pipe.

[0011] The return water pipe is a flexible pipe, and its water outlet end extends out of the top cover and a certain length is reserved.

[0012] A turbine for stirring the heat conducting oil is arranged in the heat conducting box.

[0013] The lower heating device is a lower heating pipe, which is arranged on the lower side of the bottom surface of the heat conducting box or in the heat conducting box. The lower heating pipe is connected to a second temperature controller circuit and then connected to a power supply.

[0014] An inwardly concave installation groove is provided at the lower end surface of the upper cover. An upper heating device is arranged in the installation groove. After the upper heating device is connected to a first temperature controller circuit, it is then connected to a power supply.

[0015] In this application, a heat-conducting box is provided and filled with heat-conducting oil. First, the lower heating pipe is used to heat the liquid medium of the heat-conducting oil, and then the heat-conducting oil is used to uniformly heat the upper surface of the heat-conducting box, so that the bottom of the pasta placed on it can be uniformly heated. The baking process of this application can make the bottom of the naan embryo evenly heated. The pasta baked in this way can be uniformly heated under a constant temperature state, is soft after being cooked, and has no burnt parts, which is very suitable for baking pasta, especially for baking traditional pasta of ethnic minorities. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] The specific structure of this application is given by the following drawings and embodiments: FIG. Figure 1 is a schematic structural diagram of this application with the lower heating pipe arranged outside the heat-conducting box; FIG. Figure 2 is a front view structural diagram of this application; FIG. Figure 3 is a schematic structural diagram of this application with the lower heating pipe arranged inside the heat-conducting box; FIG. Figure 4 is a schematic structural diagram with a turbine arranged inside the heat-conducting box; FIG. Figure 5 is a schematic structural diagram of the cooling device; FIG. Figure 6 is a schematic structural diagram of the water inlet pipe.

[0017] LEGEND: 1. Cooling device, 1-1. Top cover, 1-2. Cooling pipe, 1-3. Water inlet pipe, 1-31. Outer pipe, 1-32. Inner pipe, 1-33. Limit rod, 1-34. Limit head, 1-35. Chute, 2. Coiled pipe, 3. Box body, 4. Heat preservation layer, 5. Oil inlet pipe, 6. Lower heating pipe, 7. Heat-conducting box, 8. Baking trough, 9. Upper cover, 10. Installation groove, 11. Upper heating pipe, 12. Reserved cavity, 13. Water return pipe, 14. Water tank, 15. First temperature controller, 16. Second temperature controller, 17. Turbine. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0018] This application is not limited by the following embodiments, and the specific implementation manners can be determined according to the technical solutions of this application and the actual situation.

[0019] In the present invention, for the convenience of description, the relative position relationships of the components are all described according to the layout mode of the attached drawings of the specification. For example, the position relationships such as up, down, left, and right are determined according to the layout direction of the attached drawings of the specification. Figure 1 of the layout. Figure 1 of the layout direction of the attached drawings of the specification.

[0020] The present invention will be further described below in conjunction with the embodiments and the drawings, as Figures 1-6As shown in the figure, the oven heated by a liquid medium at a constant temperature includes a box body 3. A baking groove 8 is provided on the upper end face of the box body 3. The baking groove 8 has an opening at the lower end. A heat conduction box 7 is arranged on the lower side of the opening. The heat conduction box 7 is filled with heat conduction oil, and the heat conduction box 7 is hermetically connected to the bottom surface of the baking groove 8. A lower heating device for heating the heat conduction oil is arranged on the bottom side of the heat conduction box 7. A cooling device extending outside the box body 3 is arranged on one side of the upper surface of the heat conduction box 7. The cooling device includes a water tank 14, a cooling pipe 1-2, a water inlet pipe 1-3, and a coil pipe 2 that are communicated with the water tank 14. The lower end of the cooling pipe 1-2 is conducted with the heat conduction box 7. An upper cover 9 capable of covering the baking groove 8 is connected to the side of the baking groove 8, and an upper heating device is installed in the upper cover 9.

[0021] Further, as Figure 2 , 5 shown in the figure, the cooling devices are symmetrically arranged on both sides of the box body 3. The cooling device includes a cooling pipe 1-2 communicated with the heat conduction box 7. The upper end of the cooling pipe 1-2 extends out of the box body 3 and is covered with a top cover 1-1. An inlet and an outlet are provided on the top cover 1-1. The inlet is communicated with the water inlet pipe 1-3, and the outlet is communicated with a return water pipe 13. A coil pipe 2 is arranged in the cooling pipe 1-2. The water inlet of the coil pipe 2 is communicated with the water outlet of the water inlet pipe 1-3, and the water outlet of the coil pipe 2 is communicated with the water inlet of the return water pipe 13. The water inlet of the water inlet pipe 1-3 is communicated with the water tank 14.

[0022] Further, as Figure 6 shown in the figure, the water inlet pipe 1-3 includes an outer pipe 1-31. The upper and lower ends of the outer pipe 1-31 are respectively connected to the water tank 14 and the cooling pipe 1-2. An inner pipe 1-32 that can move up and down is inserted in the outer pipe 1-31. Sealing rings are arranged between the upper and lower parts of the outer pipe 1-31 and the inner pipe 1-32. Dynamic seals are formed between the upper and lower parts of the outer pipe 1-31 and the inner pipe 1-32. The upper end water inlet of the inner pipe 1-32 extends into the water tank 14 and is communicated with the water tank 14. The lower end water outlet of the inner pipe 1-32 is communicated with the water inlet of the coil pipe 2.

[0023] Further, a sliding groove 1-35 is provided on the side wall of the outer pipe 1-31. A limiting rod 1-33 is slidably arranged in the sliding groove 1-35. A limiting head 1-34 is arranged at the outer end of the limiting rod 1-33, and the inner end is fixedly connected to the inner pipe 1-32. The limiting rod 1-33 is a screw rod, and an external thread is provided on it. The limiting head 1-34 is a nut, and the limiting head 1-34 is screwed with the limiting rod 1-33. By loosening or tightening the limiting head 1-34, the position of the limiting rod 1-33 in the sliding groove 1-35 can be adjusted, so as to adjust the rising or falling of the inner pipe 1-32, and further control whether the coil pipe 2 is located in the cooling pipe 1-2 or descends into the heat conduction box 7.

[0024] Further, the return water pipe 13 is a flexible pipe, and its water outlet end extends out of the top cover 1-1 and reserves a certain length to meet the lifting requirements of the inner pipe 1-32.

[0025] Further, as Figure 1 shown, the lower heating device is a lower heating pipe 6, which can be an electric heating pipe. It is arranged on the lower side of the bottom surface of the heat conduction box 7. The lower heating pipe 6 is connected to the second temperature controller 16 in an electrical circuit and then connected to the power supply. In this way, the lower heating pipe 6 heats the heat conduction oil inside the heat conduction box 7 from the outside. This method is beneficial for the maintenance of the lower heating pipe 6 and does not require the heat conduction oil to be drained, but the heating efficiency is lower compared to setting the lower heating pipe 6 inside the heat conduction box 7.

[0026] As another embodiment of the present application, as Figure 2 、 4 shown, the lower heating device is a lower heating pipe 6, which can be an electric heating pipe. It is arranged inside the heat conduction box 7. The lower heating pipe 6 is connected to the second temperature controller 16 in an electrical circuit and then connected to the power supply. In this way, the lower heating pipe 6 heats the heat conduction oil inside the heat conduction box 7 from the inside. This method is not beneficial for the maintenance of the lower heating pipe 6 and requires the heat conduction oil to be drained. Therefore, an oil inlet pipe 5 needs to be provided at the bottom of the heat conduction box 7 for the introduction and drainage of the heat conduction oil. And the electrical connection end of the electric heating pipe needs to be arranged outside the heat conduction box 7, and the sealing requirement for the interface is relatively high, but the heating efficiency is higher compared to setting the lower heating pipe 6 outside the heat conduction box 7.

[0027] Further, as Figure 4 shown, in order to enable the heat conduction oil to be heated quickly and evenly, a turbine 17 for agitating the heat conduction oil is arranged inside the heat conduction box 7. The turbine 17 is driven by a motor (not shown in the figure) arranged outside the heat conduction box 7. This structure has a relatively high sealing requirement for the connection between the transmission shaft and the heat conduction box 7. Therefore, generally, the turbine 17 does not need to be provided.

[0028] Further, as Figure 1 、 2 、3, and 4 shown, the rear end of the upper cover 9 is hinged to the upper surface of the box body 3. The hinged method can adopt a hinge structure, which is not the inventive point of the present application, and the specific installation method will not be described here.

[0029] Further, an inwardly concave installation groove 10 is provided on the lower end surface of the upper cover 9, and an upper heating device is arranged in the installation groove 10. The upper heating device is an electric heating pipe. After the electric heating pipe is connected to the first temperature controller 15 in an electrical circuit, it is then connected to the power supply.

[0030] The upper heating device, the lower heating device, the first temperature controller, the second temperature controller, the power supply, and the electrical connection structure therebetween are prior arts and not the inventive points of the present application, and the specific structure and electrical connection structure will not be described in detail.

[0031] When baking pasta in this application, first, the first temperature controller 15 and the second temperature controller 16 are used to heat the upper heating device and the lower heating device respectively. After the heat-conducting oil in the heat-conducting box 7 reaches the set temperature, the upper cover 9 can be opened to place the dough embryo in the baking groove 8, and then the upper cover 9 is covered for baking. During the baking process, the heat-conducting oil expands and volatilizes due to heat, and the volatilized steam enters the cooling pipe 1-2. At this time, water can be supplied to the inner pipe 1-32 and the coil pipe 2 through the water tank 14 for cooling, so as to condense the steam to form oil droplets and return to the heat-conducting box 7 through the cooling pipe 1-2, avoiding the loss of the heat-conducting oil. The cooling water flows back to the water storage tank with a water pump through the water return pipe 13 for reuse. The amount of heat-conducting oil added is such that it just enters the cooling pipe 1-2, so that the upper surface of the heat-conducting box 7 can be in full contact with the heat-conducting oil and be evenly heated.

[0032] Since the heat-conducting oil cools down slowly, the coil pipe 2 can be adjusted to descend into the heat-conducting box 7 for rapid cooling, so that it can be carried out when it is necessary to quickly reduce the temperature of the heat-conducting oil. In other cases, the coil pipe 2 is located in the cooling pipe 1-2 to cool the steam.

[0033] To prevent the heat dissipation of the heat-conducting oil, a high-temperature resistant heat-insulating layer 4 is filled in the space between the heat-conducting box 7 and the box body 3 except for the baking groove 8 on the upper end face.

[0034] A reserved cavity 12 with a cavity is provided at the rear side of the upper cover 9 of the box body 3, and tools for baking pasta can be placed in this cavity 12. The water storage tank can also be arranged therein to facilitate overall handling.

[0035] The above description is only an example for clearly explaining this application, and is not a limitation on the implementation mode of this application. Any obvious changes or variations derived from the technical solution of this application still fall within the protection scope of this application.

Claims

1. An oven using a liquid medium for constant temperature heating comprises a box body, a baking groove is provided on the upper end surface of the box body, and is characterized in that: The lower end of the baking oven is open, and a heat conduction box is arranged on the lower side of the opening. The heat conduction box is filled with heat conduction oil, and the heat conduction box is sealed and connected to the bottom surface of the baking oven; a lower heating device for heating the heat conduction oil is arranged on the bottom side of the heat conduction box, and a cooling device extending out of the box is arranged on one side of the upper surface of the heat conduction box. The cooling device includes a water tank, a cooling pipe connected to the water tank, a water inlet pipe, and a coil. The lower end of the cooling pipe is connected to the heat conduction box, and an upper cover that can seal the baking oven is connected to the baking oven side, and an upper heating device is installed in the upper cover.

2. The oven using liquid medium constant temperature heating as claimed in claim 1 comprises a box, characterized in that: The cooling device includes a cooling pipe connected to the heat conduction box, the upper end of the cooling pipe extends out of the box body and is covered with a top cover, an inlet and an outlet are opened in the top cover, the inlet is connected to a water inlet pipe, and the outlet is connected to a water return pipe. A coil is arranged in the cooling pipe, the water inlet of the coil is connected to the water outlet of the water inlet pipe, the water outlet of the coil is connected to the water inlet of the return pipe, and the water inlet of the water inlet pipe is connected to the water tank.

3. The oven using liquid medium constant temperature heating as claimed in claim 2 comprises a box, characterized in that: The water inlet pipe includes an outer pipe, the upper and lower ends of which are respectively connected to the water tank and the cooling pipe, an inner pipe that can move up and down is inserted in the outer pipe, a sealing ring is arranged between the outer pipe and the upper and lower parts of the inner pipe, and a dynamic seal is formed between the outer pipe and the upper and lower parts of the inner pipe, the water inlet at the upper end of the inner pipe extends into the water tank and is connected to the water tank, and the water outlet at the lower end of the inner pipe is connected to the water inlet of the coil.

4. The oven using liquid medium for constant temperature heating as claimed in claim 3 comprises a box, characterized in that: A slide groove is provided on the side wall of the outer tube, a limit rod is slidably arranged in the slide groove, a limit head is arranged at the outer end of the limit rod, and the inner end is fixedly connected with the inner tube.

5. The oven using liquid medium for constant temperature heating as claimed in claim 2 comprises a box, characterized in that: The water return pipe is a hose, the water outlet end of which extends out of the top cover and has a certain length reserved.

6. The oven using liquid medium for constant temperature heating as claimed in claim 1 or 2 or 3 or 4 or 5 comprises a box, characterized in that: A turbine for stirring the heat transfer oil is arranged in the heat transfer box.

7. The oven using liquid medium for constant temperature heating as claimed in claim 1 or 2 or 3 or 4 or 5 comprises a box, characterized in that: The lower heating device is a lower heating tube, which is arranged on the lower side of the bottom surface of the heat conduction box or in the heat conduction box. The lower heating tube is connected to the second temperature controller circuit and then to the power supply.

8. The oven using liquid medium for constant temperature heating as claimed in claim 1, 2, 3, 4 or 5 comprises a box, characterized in that: An inwardly concave installation groove is provided at the lower end surface of the upper cover, and an upper heating device is arranged in the installation groove. The upper heating device is connected to the first temperature controller circuit and then to the power supply.

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