Heating and drying equipment

Abstract

The utility model discloses heating and drying equipment which comprises a heat machine, a cold machine, an air return assembly, an air supply assembly and an air duct, and the cold machine is provided with an evaporation fan and an evaporator to form cold air and output the cold air to the external environment; the air return assembly and the air supply assembly communicate with the heat engine. The air supply end of the air supply assembly forms an air supply channel, and air supply holes are formed in the inner wall of the air supply channel. The air return end of the air return assembly forms an air return channel, and air return holes are formed in the inner wall of the air return channel. The air supply end and the air return end are spliced to the two ends of the air channel respectively, the air supply channel, the air channel and the air return channel form a heating and drying channel, and the two sides of the heating and drying channel are provided with containing bottoms. The heat engine is provided with a condensation fan and a condenser, air in the air return assembly becomes hot air after flowing through the condenser, and the hot air is exhausted from the heat engine to the air supply assembly under the action of the condensation fan and enters the heating and drying channel. The heating and drying equipment is suitable for a production line, has the advantages of energy conservation and environmental protection, and can reduce the external environment temperature.

Description

Technical Field

[0001] The utility model relates to the technical field of material heating and drying, in particular to a heating and drying device suitable for heating and drying materials on a production line. Background Art

[0002] At present, the more common production line generally includes a conveyor belt and support frames on both sides of the conveyor belt. The conveyor belt can continuously transport materials. For example, the conveyor belt used in the shoemaking process can be a steel mesh belt, a high-temperature resistant plastic belt, etc. During operation, the conveyor belt is driven by the driving wheel, and the support frames on both sides have a flat top surface, which is basically flush with the surface of the conveyor belt. The support frame can be used to place a drying device to heat and dry the materials on the conveyor belt.

[0003] At present, the heating and drying device for drying materials on the conveyor belt is generally an electric heating device, which uses the heat released by the set electric heating tube to heat the dried materials. It has the disadvantages of high power consumption, lack of environmental protection and energy saving. In addition, in summer, the use of electric heating drying device will increase the ambient temperature during use, making the workshop even hotter.

[0004] Therefore, how to design a heating and drying equipment that can adapt to the heating and drying of materials on the conveyor belt of the production line, while effectively solving the problems of power saving, energy saving and environmental protection, and effectively reducing the ambient temperature, is a technical problem that technical personnel in the industry urgently need to solve. Utility Model Content

[0005] In order to solve the technical problems of saving electricity, energy saving and environmental protection and effectively improving the ambient temperature, the utility model proposes a heating and drying device suitable for drying materials on a conveyor belt of a production line.

[0006] The utility model proposes a heating and drying device, comprising a heat engine, a cold engine, a return air assembly, an air supply assembly and an air duct; the cold engine is equipped with an evaporating fan and an evaporator, and the temperature of the external environment gas is reduced to become cold air when flowing through the evaporator, and the cold air is discharged from the cold engine to enter the external environment under the action of the evaporating fan; the return air assembly and the air supply assembly are respectively connected to the heat engine; the air supply end of the air supply assembly constructs an air supply channel, and the inner wall of the air supply channel is provided with air supply holes; the return air end of the return air assembly constructs a return air channel, and the inner wall of the return air channel is provided with return air holes; the air supply end is spliced ​​to one end of the air duct, and the return air end is spliced ​​to the other end of the air duct, and the air supply channel, the air duct, and the return air channel together constitute a heating and drying channel; the heat engine is equipped with a condensing fan and a condenser, and the temperature of the gas in the return air assembly increases to become hot air when flowing through the condenser, and the hot air is discharged from the heat engine to the air supply assembly under the action of the condensing fan and enters the heating and drying channel.

[0007] In some embodiments, the return air assembly includes a return air duct and the return air end connected to the return air duct, and the supply air assembly includes a supply air duct and the supply air end connected to the supply air duct;

[0008] The heat engine is provided with a return air interface, and the return air duct is connected to the return air interface so that the return air end is connected to the heat engine. The heat engine is also provided with an air supply interface, and the air supply duct is connected to the air supply interface so that the air supply end is connected to the heat engine.

[0009] In some embodiments, the air duct includes a skeleton layer and a thermal insulation layer.

[0010] Preferably, the skeleton layer is arranged on the outer layer, and the thermal insulation layer is arranged on the inner layer.

[0011] Preferably, the air duct comprises two opposite side walls and a top wall connecting the two opposite side walls, and the two side walls and the top wall together form a channel for gas flow.

[0012] In some embodiments, one end of the air supply channel is configured as a spliced ​​end, and both sides of the air supply channel are configured to place the bottom.

[0013] Preferably, the air supply end includes a top pipe and side pipes connected to both sides of the top pipe, the top pipe and the side pipes together form the air supply channel, and the air supply holes are arranged on the inner wall of the air supply channel.

[0014] Preferably, one end of the return air duct is also configured as a spliced ​​end, and both side portions of the return air duct are also configured as a bottom placement portion.

[0015] Preferably, the return air end also includes a top pipe and side pipes connected to both sides of the top pipe, the top pipe and the side pipes together form the return air channel, and the return air holes are arranged on the inner wall of the return air channel.

[0016] In some embodiments, the air supply duct and the return air duct are both hard tubes or flexible tubes; preferably, the hard tube is a tube formed by splicing metal plates, and the flexible tube is a temperature-resistant corrugated duct.

[0017] In some embodiments, the air supply holes include at least side air supply holes arranged on the inner side wall of the air supply channel.

[0018] Preferably, the air supply holes at least include a top air supply hole located on the top wall of the air supply channel.

[0019] Preferably, oblique guide plates for guiding the flow direction of hot air are arranged in the top air supply holes.

[0020] Preferably, the air supply hole is also provided at the connection between the inner top wall and the inner side wall of the air supply channel.

[0021] In some embodiments, the return air holes include at least side return air holes located on the inner side wall of the return air channel.

[0022] Preferably, the return air holes at least include top return air holes arranged on the top wall of the return air channel.

[0023] Preferably, the return air hole is also provided at the connection between the inner top wall and the inner side wall of the return air channel.

[0024] In some embodiments, the air supply interface is located on the air supply side wall of the heat engine; preferably, the air supply interface is centrally located on the air supply side wall of the heat engine.

[0025] Preferably, the air supply interface matches the size and shape of the condensing fan outlet.

[0026] Preferably, the outlet end of the condensing fan is installed on the air supply interface.

[0027] Preferably, the return air interface is located on the return air side wall of the heat engine.

[0028] Preferably, the air supply side wall body and the return air side wall body are arranged opposite to each other, and the air supply side wall body and the return air side wall body are respectively two opposite side walls of the heat engine.

[0029] Preferably, the edge of the return air interface is close to the edge of the return air side wall of the heat engine.

[0030] Preferably, the condenser is arranged close to the return air interface, and the air inlet side of the condenser faces the return air interface.

[0031] In some embodiments, the heating and drying device further comprises a circulation system, in which a refrigerant circulates, and the circulation system comprises a compressor, the condenser and the evaporator connected by pipelines.

[0032] The cooling machine and the heat engine are of separate type, and the two are connected through the pipeline of the circulation system, wherein the cooling machine is placed on the top of the heat engine or placed beside the production line or suspended, and the heat engine is placed on the top of the air duct;

[0033] Alternatively, the cold engine and the hot engine are integrated, wherein the cold engine is located on top of the hot engine, and a common partition is used to form a cold and hot isolation between the two, and the hot engine is placed on the top of the air duct.

[0034] Preferably, the evaporator is arranged close to one side of the cold machine, the air inlet side of the evaporator faces the side, the side is constructed as a side wall structure, and the side wall structure is a mesh plate.

[0035] Preferably, the cold machine is also provided with an electric control operating room, and the electric control operating room is provided with an operating panel for control operation.

[0036] In some embodiments, the tops of the supply air splicing section and the air duct remain flush after being spliced ​​together, and the tops of the return air splicing section and the air duct remain flush after being spliced ​​together, and the air duct also has a placement top.

[0037] The heating and drying equipment proposed in the utility model can be directly placed and adapted to the conveyor belt of the production line through compact structure and reasonable layout of the heat engine and the cold engine. Overall, it has the following significant beneficial effects:

[0038] 1. The utility model is provided with a heating and drying channel, and both sides of the heating and drying channel are provided with a placement bottom, so that it can be placed on the support frame on both sides of the conveyor belt of the production line. It can be seen that the heating and drying equipment of the utility model can be adapted for use in the production line;

[0039] 2. The hot air generated by the heat engine of the heating and drying equipment of the utility model can be transported to the heating and drying channel to heat and dry the materials or the attachments on the materials. After the hot air is heated and dried for the materials or the attachments on the materials, the temperature is reduced, and the gas with reduced temperature can be returned to the heat engine and turned into hot air again through the condenser, and the cycle is repeated. Compared with the electric heating mode, it is more energy-saving, environmentally friendly, and power-saving, and can effectively improve the energy efficiency of the whole machine;

[0040] 3. The utility model forms two air circulations through the setting of each fan, one is the circulation of the heat machine and the gas in the heating and drying channel, and the other is the circulation of the gas between the cooling machine and the external environment. The two circulations do not interfere with each other, which effectively improves the energy efficiency of the whole machine;

[0041] 4. The hot air generated by the heat engine of the heating and drying equipment of the utility model can heat the drying materials or the attachments on the materials, and the cold air generated by the cold engine can be discharged to the outside environment to obtain an effect similar to that of summer air conditioning, and finally reduce the temperature of the outside environment, such as the temperature of the workshop; for this beneficial effect, compared with the existing mode of using electric heating to obtain heat energy, it is obvious that the utility model has particularly obvious advantages in terms of energy saving, environmental protection and power saving, especially in terms of improving the temperature of the outside environment;

[0042] 5. In the cold machine, the water vapor in the external environment gas will condense into water droplets after passing through the cold evaporator together with the external environment gas, which can effectively reduce the humidity of the cold air. When the low-humidity cold air is discharged into the external environment, the humidity of the external environment gas is reduced, especially in the rainy season, the air humidity is reduced, it is easier to heat and dry, more energy-saving and electricity-saving, and the effect is very obvious. BRIEF DESCRIPTION OF THE DRAWINGS

[0043] Figure 1 It is a schematic diagram of the overall end structure of the heating and drying equipment of the utility model in the first and second embodiments after being placed on the production line;

[0044] Figure 2 A schematic diagram of the first perspective three-dimensional structure of the heating and drying equipment provided for the first and second embodiments of the utility model (the production line is not shown, and the pipe connection between the heat machine and the cold machine is only simplified and schematically shown).

[0045] Figure 3 This is a schematic diagram of the second perspective three-dimensional structure of the heating and drying equipment provided in the first and second embodiments of the utility model (the production line and the cooling machine are not shown).

[0046] Figure 4 This is a schematic diagram of the three-dimensional structure of the heat engine provided in the second embodiment of the utility model in the first orientation.

[0047] Figure 5 This is a schematic diagram of the three-dimensional structure of a refrigerator in the first orientation provided by the second embodiment of the utility model (wherein the evaporating fan is only shown in a simplified schematic manner).

[0048] Figure 6 This is a schematic diagram of the second perspective three-dimensional structure of a refrigerator provided in the second embodiment of the utility model (wherein the evaporating fan is only shown in a simplified schematic manner).

[0049] Figure 7 This is a schematic diagram of the second perspective three-dimensional structure of the heat engine provided by the second embodiment of the utility model.

[0050] Figure 8 This is a side structural schematic diagram of a refrigerator provided in the second embodiment of the utility model (the side panels and other components have been removed, and the evaporating fan is only shown in a simplified schematic manner).

[0051] Fig. 9 This is a side structural schematic diagram of a heat engine provided in the second embodiment of the utility model (parts such as the side panels have been removed).

[0052] Fig.10 This is a schematic diagram of the three-dimensional structure of an integrated unit provided in the fourth embodiment of the utility model.

[0053] Reference numerals

[0054] Heating and drying equipment 100, air duct 200, conveyor belt 300, supporting frame 400;

[0055] Condenser 1, evaporator 2, heat engine 3, cold engine 4, condensing fan 5, air supply interface 6, return air interface 7, evaporating fan 8, air supply duct 9, air supply end 10, side air supply hole 11, top air supply hole 12, inclined guide plate 13, return air end 14, side return air hole 15, top return air hole 16, return air channel 17, air supply channel 18, channel 19, return air duct 20. DETAILED DESCRIPTION

[0056] The following will be combined with the accompanying drawings to clearly describe the technical solutions in the specific embodiments of the utility model. Obviously, the described embodiments are part of the embodiments of the present application, rather than all the embodiments. All other embodiments obtained by ordinary technicians in this field based on the following embodiments are within the scope of protection of the utility model.

[0057] The specific concept of the utility model is mainly to set up a circulation system including an evaporator, a compressor, a condenser and a throttling element, so that the refrigerant circulates in the circulation system, and when passing through the evaporator and the condenser, heat exchange occurs with the air around the evaporator and the condenser, so that the temperature of the gas around the device body changes, and through specific structures, such as the setting of a heat engine and a cold engine, corresponding hot air and low-humidity cold air are obtained, and the hot air is blown toward the material on the conveyor belt of the production line under the action of the condensing fan to heat and dry the material or the attachments on the surface of the material, and the low-humidity cold air is discharged into the external environment under the action of the evaporating fan, providing a cooling effect similar to that of air conditioning.

[0058] The heating and drying equipment of the utility model can be placed on the supporting frames on both sides of the conveyor belt of the production line, and can perform heating and drying treatment on the materials on the conveyor belt or the attachments on the surface of the materials.

[0059] The following is a detailed description with reference to specific embodiments.

[0060] Embodiment 1

[0061] See also Figure 1 , illustrates the state of the heating and drying device 100 of the utility model located on the production line. It should be noted that the production line includes a conveyor belt 300 and a support frame 400 located on both sides of the conveyor belt 300. The conveyor belt 300 is a carrier for conveying materials that runs continuously on the production line and has a certain temperature resistance, such as a steel mesh belt, a high temperature resistant belt, a transmission belt used in the shoemaking process, and other types of conveyor belts.

[0062] like Figures 2 to 3 As shown, the heating and drying device 100 of the present invention is shown in different positions.

[0063] In this embodiment, the heat engine 3 is placed on the top of the air duct 200, and the cold engine 4 is placed on the foundation beside the production line. In this embodiment, the heat engine 3 and the cold engine 4 are split, and the two are connected by the pipeline of the circulation system.

[0064] In this embodiment, the air duct 200 includes a skeleton layer and a heat preservation layer. In this embodiment, the skeleton layer is arranged on the outer layer, and the heat preservation layer is arranged on the inner layer. The skeleton layer is arranged on the outer layer mainly to reliably support the heat engine 3.

[0065] In this embodiment, the air duct 200 includes two opposite side walls and a top wall connecting the two opposite side walls, and the two side walls and the top wall together form a channel 19 for gas flow.

[0066] Embodiment 2

[0067] In this embodiment, for the heating and drying device 100, the following is combined with Figures 1 to 9 Elaborate in detail.

[0068] In this embodiment, the heating and drying device 100 includes a heat engine 3, a cold engine 4, a return air assembly, an air supply assembly and an air duct 200. The heat engine 3 and the cold engine 4 have the same circulation system, that is, the components of the circulation system are separately arranged in the cold engine 4 and the heat engine 3.

[0069] In this embodiment, the circulation system circulates refrigerant, and the circulation system includes components such as a condenser 1, an evaporator 2, a compressor, and a throttling element connected by pipelines. Since the refrigerant circulates in the circulation system, under the action of the compressor, the refrigerant exchanges heat with the air around the body when flowing through the evaporator 2 and the condenser 1, and the refrigerant changes from gas to liquid state, thereby realizing energy conversion.

[0070] In this embodiment, the refrigerant is Freon commonly used in air conditioners. Among many refrigerants, its cooling (heat) efficiency is very significant, thereby ensuring the excellent effect of the tunnel dryer in energy saving, environmental protection and electricity saving.

[0071] In this embodiment, the heat engine 3 and the cold engine 4 are of separate type, and the cold engine 4 and the heat engine 3 are connected through the pipeline of the circulation system. The cold engine 4 is arranged on the foundation beside the production line, and the heat engine 3 is placed on the top of the air duct 200. The heat engine 3 has a placement bottom, and the placement bottom has a flat bottom surface, and the air duct 200 also has a flat top surface, so the heat engine 3 can be stably and reliably placed on the top of the air duct 200 through the flat bottom surface of the placement bottom, and the heat engine 3 itself has a certain weight, so it will not easily shift.

[0072] In this embodiment, the heat engine 3 is equipped with a condensing fan 5 and the condenser 1. Since the refrigerant changes from gas to liquid when entering the condenser 1, a large amount of heat will be released, so the gas around the condenser 1 absorbs the heat released by the refrigerant and the temperature rises, turning into the required hot gas. The heat engine 3 is provided with an air supply interface 6 for the hot gas in the heat engine 3 to flow out. The heat engine 3 is also provided with a return air interface 7 for gas to enter the heat engine 3.

[0073] In this embodiment, the refrigerator 4 is provided with an evaporating fan 8 and the evaporator 2. When the external environment gas flows through the evaporator 2, the refrigerant absorbs heat and turns into cold air. The cold air is discharged from the refrigerator 4 to enter the external environment under the action of the evaporating fan 8, which is conducive to reducing the temperature of the external environment. It should be noted that after the refrigerant enters the evaporator 2, it changes from liquid to gas and absorbs a large amount of heat. As a result, the air around the evaporator 2 absorbs a large amount of heat and the temperature is reduced, thereby turning into cold air. It can be seen that the external environment and the gas in the refrigerator 4 form a circulation, and the entire circulation is unidirectional without the generation of turbulence, so that the gas flows smoothly without loss, effectively improving the energy efficiency of the system.

[0074] As an air supply component, in the present embodiment, the air supply component includes an air supply duct 9 and an air supply end 10 connected to the air supply duct 9; the air supply end 10 is connected to the air supply interface 6 through the air supply duct 9, thereby realizing the connection between the air supply end 10 and the heat engine 3. The air supply duct 9 is provided with a bending section approximately at a right angle at the outlet, the purpose of which is to connect with the top of the air supply end 10. The air supply end 10 is provided with a top pipe and two side pipes, and the top pipe and the two side pipes jointly enclose an air supply channel 18. In the present embodiment, the air supply duct 9 is a hard tube made of metal material spliced ​​by sheet metal parts. Of course, in other embodiments, other flexible tubes such as metal materials can also be used to replace the hard tube in the present embodiment, such as a corrugated flexible air duct made of metal.

[0075] In this embodiment, the bottom of the side tube of the air supply end 10 is closed for placement on the support frame 400 on both sides of the conveyor belt 300. The end of the air supply end 10, that is, the end of the top tube and the two side tubes on the same side, is also configured as a flat splicing end with a flat splicing end wall. Therefore, the air supply end 10 can be aligned with one end of the air duct 200, which is equivalent to increasing the length of the air duct 200 after alignment.

[0076] When the bottoms of the two side tubes of the air supply end 10 are respectively placed on the support frames 400 on the two sides of the conveyor belt 300, and the spliced ​​end of the air supply end 10 is aligned with one end of the air duct 200, the channel enclosed between the air supply end 10 and the conveyor belt 300 is equivalent to the air supply channel 18. The inner wall of the air supply channel 18 is provided with air supply holes, so that hot air enters the air supply channel 18 from the air supply end 10 through the air supply holes.

[0077] Regarding the arrangement of the air supply holes, in this embodiment, the air supply holes include side air supply holes 11 regularly arranged on the inner side wall of the air supply channel 18, top air supply holes 12 located on the inner top wall of the air supply channel 18, and small air supply holes located at the connection between the inner top wall and the inner side wall of the air supply channel 18. It can be seen that the air supply holes are basically arranged at the positions that can be arranged on the inner wall of the air supply channel 18, with the purpose of increasing the number of air supply holes and achieving a better air supply volume per unit time.

[0078] In this embodiment, in order to guide the hot air flow, an oblique guide piece 13 for guiding the hot air flow is arranged in the top air supply hole 12. After the air supply end is matched with one end of the air duct 200, the oblique guide piece 13 is deflected toward the center direction of the channel 19 so as to guide the hot air to smoothly enter the channel 19.

[0079] In the present embodiment, as the specific structure of the return air assembly, the return air assembly includes a return air duct 20 and a return air end 14 connected to the return air duct 20. The return air end 14 is connected to the return air interface 7 through the return air duct 20, so that the return air end 14 is connected to the heat engine 3. The return air end 14 also includes a top pipe and side pipes connected to both sides of the top pipe, and the top pipe and the side pipes together enclose a return air channel 17. In the present embodiment, the return air duct 20 is a hard tube made of metal material spliced ​​by sheet metal parts. Of course, in other embodiments, other flexible tubes such as metal materials can also be used instead. Such as a corrugated flexible air duct made of metal.

[0080] It should be noted that, in this embodiment, the shape and size of the return air end 14 are basically the same as those of the air supply end 10, except that the return air end 14 is spliced ​​to the other end of the air duct 200, and the structure and shape of the return air hole are different. Therefore, the return air end 14 is also placed on the support frame 400 on both sides of the conveyor belt 300 through the bottom of the side pipe, and is spliced ​​to the other end of the air duct 200 by aligning the splicing ends.

[0081] When the return air end 14 is aligned and spliced ​​with the air duct 200, and the two side pipes of the return air end 14 are placed on the support frame 400 on both sides of the conveyor belt 300, the channel enclosed between the return air end 14 and the conveyor belt 300 is equivalent to the return air channel 17. The inner wall of the return air channel 17 is provided with a return air hole, so that the gas in the return air channel 17 can enter the return air end 14 through the return air hole.

[0082] As a specific setting of the return air holes, in this embodiment, the return air holes include side return air holes 15 located on the inner side wall of the return air channel 17, top return air holes 16 regularly arranged on the inner top wall of the return air channel 17, and small return air holes located at the connection between the inner top wall and the inner side wall of the return air channel 17. The return air holes are basically fully set on the inner side wall of the return air channel 17, and the purpose is also to increase the air intake per unit time and improve the energy efficiency of the system. In this embodiment, the side return air hole 15 is a large hole, and the edge of the side return air hole 15 is basically set close to the edge of the side wall, so that a large side return air hole 15 is set on a side wall, which effectively allows gas to enter quickly and conveniently.

[0083] In this embodiment, the arrangement of the air supply interface 6 and the return air interface 7 is described in detail. The air supply interface 6 is centrally located on the air supply side wall of the heat engine 3, and the air supply interface 6 matches the size and shape of the outlet of the condensing fan 5. In this embodiment, the outlet end of the condensing fan 5 is directly installed in the air supply interface 6. For the convenience of connection, a connecting flange is installed on the air supply interface 6 to facilitate connection with the air supply duct 9. As for the return air interface 7, the return air interface 7 is located on the return air side wall of the heat engine 3, and the edge of the return air interface 7 is close to the edge of the return air side wall of the heat engine 3. It can be seen that the size of the return air interface 7 is as large as possible so that a sufficient amount of gas can enter the heat engine 3 through the return air interface 7. As for the arrangement of the condenser 1, the condenser 1 is arranged close to the return air interface 7, and the air inlet side of the condenser 1 faces the return air interface 7. As a result, the gas can be directly heated by passing through the condenser 1 in a short distance after entering.

[0084] In this embodiment, the evaporator 2 is arranged near one side of the cold machine 4, and the air intake side of the evaporator 2 faces the side, which is configured as a side wall structure, and the side wall structure is a mesh plate (not marked), through which the external environment gas can enter the cold machine 4, and the mesh plate can also protect the evaporator 2 body after being set. In this embodiment, the cold machine 4 also constructs an electric control operation room (not marked), and the electric control operation room constructs an operation panel (not marked) for operation. Therefore, the device can be electrically controlled through the operation panel.

[0085] In this embodiment, the air supply end 10 is aligned and spliced ​​at one end of the air duct 200, and the air return end 14 is aligned and spliced ​​at the other end of the air duct 200. It should be noted that after splicing, in order to increase the connection firmness between the three, glue can be applied on the splicing wall, or screw connection can be adopted, etc., in order to increase the connection firmness and avoid air leakage. In addition, after the three are spliced, the tops of the three are kept flush to avoid partial bulging of the tops.

[0086] After splicing, the air supply end 10, the air duct 200, the return air end 14 and the conveyor belt 300 together form a heating and drying channel including the air supply channel 18, the channel 19, and the return air channel 17. The heating and drying channel is similar to a tunnel, so the heating and drying channel can also be called a tunnel-type heating and drying channel. In order to be placed on the support frame 400 on both sides of the conveyor belt 300, the two sides of the heating and drying channel are provided with a placement bottom, and the two opposite placement bottoms can be stably placed on the corresponding support frame 400.

[0087] In this embodiment, the tunnel-type heating and drying passage has two ends, and the two ends are open to facilitate the movement of materials on the conveyor belt 300. To prevent hot air from escaping from the tunnel-type heating and drying passage, door curtains are provided at the two ends to prevent hot air from escaping.

[0088] During the gas circulation process, the hot gas enters the tunnel-type heating and drying channel through the air supply end 10 to heat and dry the materials or the attachments on the materials on the conveyor belt 300. The gas in the tunnel-type heating and drying channel that has been heated and dried for the materials or the attachments on the materials is returned to the heat engine 3 through the return air end 14 for another heating. It should be noted that the gas here refers to the hot gas that has been heated and dried for the materials or the attachments on the materials in this embodiment. The temperature of the hot gas is reduced at this time. Therefore, the gas with a reduced temperature is sent to the heat engine 3 again, and is heated again through the condenser 1 to become the required hot gas.

[0089] It can be seen that the heat engine 3 and the gas in the tunnel-type heating and drying channel form a one-way circulation flow, and the one-way circulation flow does not generate turbulence, the gas flows smoothly, and the heat loss during the circulation process is small, which can effectively increase the energy efficiency of the system. It should be noted that the gas contributed by the heating and drying treatment of the material or the material's attachment may be mixed with some non-contributed hot air or the gas in the tunnel-type heating and drying channel itself, which are all within the allowable protection range.

[0090] In summary, the heating and drying device 100 of the present invention utilizes the gas-liquid change of the refrigerant to obtain hot air. Compared with the air duct 200 utilizing the electric heating mode, it is more energy-saving, environmentally friendly, and power-saving as a whole, and has higher energy efficiency.

[0091] Embodiment 3

[0092] In this embodiment, what is different from the second embodiment is the setting method of the condenser. In this embodiment, the condenser 1 is set in the heat engine 3 in an oblique manner. After the oblique laying, the air inlet side area of ​​the condenser 1 is larger than that of the vertical setting, the air intake volume per unit time is increased, the heat exchange rate is high, and the equipment energy efficiency is high.

[0093] The evaporator 2 is also arranged in the cooling machine 4 in an oblique manner, which can also achieve higher energy efficiency.

[0094] Of course, the condenser and evaporator can be set upright, tilted, or even horizontally, with the best method being the one that facilitates setup and improves energy efficiency.

[0095] Embodiment 4

[0096] In this embodiment, different from the second embodiment, the cold machine 4 and the heat engine 3 are integrated, and the two together form an integrated unit. At this time, the cold machine 4 is located on the top of the heat engine 3, and the cold machine 4 and the heat engine 3 are separated by a common partition. The partition becomes the bottom plate of the cold machine 4 and the top plate of the heat engine 3.

[0097] In this embodiment, the integrated unit is placed as a whole on the top of the air duct 200 .

[0098] Of course, in other embodiments, the integrated unit can also be placed on the foundation beside the production line as a whole. In this case, the heat engine of the unit is connected to the air supply end and the air return end through a corrugated flexible air duct made of metal.

[0099] Embodiment 5

[0100] In this embodiment, different from the second embodiment, the heat engine 3 and the cold engine 4 are split, the heat engine 3 is placed on the top of the electric heating and drying section 200, and the cold engine 4 is suspended in the workshop, such as suspended above the production line.

[0101] Embodiment 6

[0102] In this embodiment, different from the second embodiment, the heat engine 3 and the cold engine 4 are split, and the cold engine 4 is placed on the top of the heat engine 3, and the heat engine 3 is placed on the top of the electric heating and drying section 200.

[0103] The embodiments of the present application are described above in conjunction with the accompanying drawings, but the present application is not limited to the above-mentioned specific implementation methods. The above-mentioned specific implementation methods are merely illustrative and not restrictive. Under the guidance of the present application, ordinary technicians in this field can also make many forms without departing from the purpose of the present application and the scope of protection of the claims, all of which are within the protection of the present application.

Claims

1. A heating and drying device, characterized in that: The invention comprises a heat engine, a cold engine, a return air assembly, an air supply assembly and an air duct; the cold engine is equipped with an evaporating fan and an evaporator, and the temperature of the external environment gas decreases when flowing through the evaporator to become cold air, and the cold air is discharged from the cold engine to enter the external environment under the action of the evaporating fan; the return air assembly and the air supply assembly are respectively connected to the heat engine; the air supply end of the air supply assembly constructs an air supply channel, and the inner wall of the air supply channel is provided with air supply holes; the return air end of the return air assembly constructs a return air channel, and the inner wall of the return air channel is provided with return air holes; the air supply end is spliced ​​to one end of the air duct, and the return air end is spliced ​​to the other end of the air duct, and the air supply channel, the air duct and the return air channel together constitute a heating and drying channel, and the two sides of the heating and drying channel are provided with a bottom for placement; the heat engine is equipped with a condensing fan and a condenser, and the temperature of the gas in the return air assembly increases when flowing through the condenser to become hot air, and the hot air is discharged from the heat engine to the air supply assembly under the action of the condensing fan and enters the heating and drying channel.

2. The heating and drying equipment according to claim 1, characterized in that: The return air assembly includes a return air duct and the return air end connected to the return air duct, and the supply air assembly includes a supply air duct and the supply air end connected to the supply air duct; The heat engine is provided with a return air interface, and the return air duct is connected to the return air interface so that the return air end is connected to the heat engine. The heat engine is also provided with an air supply interface, and the air supply duct is connected to the air supply interface so that the air supply end is connected to the heat engine.

3. The heating and drying equipment according to claim 1, characterized in that: The air duct comprises a skeleton layer and a thermal insulation layer.

4. The heating and drying equipment according to claim 3, characterized in that: The skeleton layer is arranged on the outer layer, and the heat-insulating layer is arranged on the inner layer.

5. The heating and drying equipment according to claim 3, characterized in that: The air duct comprises two opposite side walls and a top wall connecting the two opposite side walls, and the two side walls and the top wall together form a channel for gas flow.

6. The heating and drying equipment according to claim 2, characterized in that: One end of the air supply channel is configured as a spliced ​​end portion, and two side portions of the air supply channel are configured as a placement bottom portion.

7. The heating and drying equipment according to claim 6, characterized in that: The air supply end comprises a top pipe and side pipes connected to both sides of the top pipe, the top pipe and the side pipes together form the air supply channel, and the air supply holes are arranged on the inner wall of the air supply channel.

8. The heating and drying equipment according to claim 2, characterized in that: One end of the return air channel is configured as a spliced ​​end portion, and two side portions of the return air channel are configured as a bottom portion.

9. The heating and drying equipment according to claim 8, characterized in that: The return air end includes a top pipe and side pipes connected to both sides of the top pipe. The top pipe and the side pipes together form the return air channel. The return air hole is arranged on the inner wall of the return air channel.

10. The heating and drying equipment according to claim 2, characterized in that: The air supply duct and the air return duct are both hard tubes or flexible tubes.

11. The heating and drying equipment according to claim 10, characterized in that: The hard pipe is a pipe made of metal plates, and the flexible pipe is a temperature-resistant corrugated air duct.

12. The heating and drying equipment according to claim 7, characterized in that: The air supply holes at least include side air supply holes arranged on the inner side wall of the air supply channel.

13. The heating and drying equipment according to claim 7, characterized in that: The air supply holes at least include a top air supply hole located on the top wall of the air supply channel.

14. The heating and drying equipment according to claim 13, characterized in that: The top air supply hole is provided with oblique guide plates for guiding the direction of hot air flow.

15. The heating and drying equipment according to claim 7, characterized in that: The air supply hole is also provided at the connection between the inner top wall and the inner side wall of the air supply channel.

16. The heating and drying equipment according to claim 9, characterized in that: The return air holes at least include side return air holes located on the inner side wall of the return air channel.

17. The heating and drying equipment according to claim 9, characterized in that: The return air holes at least include top return air holes arranged on the top wall of the return air channel.

18. The heating and drying equipment according to claim 9, characterized in that: The return air hole is also provided at the connection between the inner top wall and the inner side wall of the return air channel.

19. The heating and drying equipment according to claim 2, characterized in that: The air supply interface is located on the air supply side wall of the heat engine.

20. The heating and drying equipment according to claim 19, characterized in that: The air supply interface is centrally located on the air supply side wall of the heat engine.

21. The heating and drying device according to claim 19, characterized in that: The air supply interface matches the size and shape of the condensing fan outlet.

22. The heating and drying equipment according to claim 21, characterized in that: The outlet end of the condensing fan is installed on the air supply interface.

23. The heating and drying device according to claim 19, characterized in that: The return air interface is located on the return air side wall of the heat engine.

24. The heating and drying equipment according to claim 23, characterized in that: The air supply side wall body and the return air side wall body are arranged opposite to each other, and the air supply side wall body and the return air side wall body are respectively two opposite side walls of the heat engine.

25. The heating and drying equipment according to claim 23, characterized in that: The edge of the return air interface is close to the edge of the return air side wall of the heat engine.

26. The heating and drying equipment according to claim 25, characterized in that: The condenser is arranged close to the return air interface, and the air inlet side of the condenser faces the return air interface.

27. The heating and drying equipment according to claim 1, characterized in that: The heating and drying device further comprises a circulation system, in which a refrigerant circulates, and the circulation system comprises a compressor, the condenser and the evaporator connected by pipelines; The cooling machine and the heat engine are of separate type, and the two are connected through the pipeline of the circulation system, wherein the cooling machine is placed on the top of the heat engine or placed beside the production line or suspended, and the heat engine is placed on the top of the air duct; Alternatively, the cold engine and the hot engine are integrated, wherein the cold engine is located on top of the hot engine, and a common partition is used to form a cold and hot isolation between the two, and the hot engine is placed on the top of the air duct.

28. The heating and drying equipment according to claim 27, characterized in that: The evaporator is arranged close to one side of the cold machine, and the air inlet side of the evaporator faces the side, and the side is constructed as a side wall structure, and the side wall structure is a mesh plate.

29. The heating and drying device according to claim 28, characterized in that: The cold machine is also constructed with an electric control operation room, and the electric control operation room is constructed with an operation panel for control operation.

30. The heating and drying equipment according to claim 1, characterized in that: The tops of the air supply end and the air duct remain flush after being spliced ​​together, and the tops of the air return end and the air duct remain flush after being spliced ​​together. The air duct also has a placement top.

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