Vacuum desiccator with thermostatic gas storage

Abstract

The utility model discloses a vacuum dryer with constant temperature gas storage, it includes: dryer main part, the dryer main part is provided with drying chamber and exhaust component, exhaust component communicates with drying chamber, constant temperature gas jar, constant temperature gas jar includes jar body and the first heating component of setting in jar body, the export end of jar body communicates with drying chamber, second heating component, second heating component communicates with the import end of jar body. In the scheme, through setting constant temperature gas jar, it can pre constant temperature storage gas, when starting airflow heating, can immediately input the hot airflow in the preset temperature range to drying chamber, and the fluctuation of gas temperature is less influenced by flow, avoids that gas overheating or subcooling influences material heating, can control the gas temperature of input drying chamber after heating in the proper range, ensures material heating effect.

Description

TECHNICAL FIELD

[0001] The utility model relates to drying equipment technical field, especially a vacuum dryer with constant temperature gas storage. BACKGROUND

[0002] Vacuum drying is the heating drying of the material to be dried under vacuum condition, which is mainly realized by the dryer with vacuum pump. The material is heated in the drying chamber during the working of the dryer, and the vacuum pump is used for air extraction to form a vacuum environment in the drying chamber, reduce the boiling point of water to accelerate the drying speed, and obtain higher drying efficiency at lower temperature, and the denaturation caused by high-temperature drying of the material can be avoided.

[0003] Among them, a common material heating mode is airflow heating, that is, the dryer is provided with an electric heating assembly, the electric heating assembly is heated first, and then hot gas is introduced into the drying chamber to contact and exchange heat with the material, so that the material can be heated. Airflow heating can well control the heating temperature and avoid overheating of the material. For the working of the vacuum dryer, the processes of inputting hot air and vacuum extraction are usually involved, and the input flow of the gas needs to be changed during the whole working process, and the gas needs to be heated by the electric heating assembly.

[0004] When the input flow of the gas changes, the heating power of the electric heating assembly also needs to be adjusted, and due to the existence of thermal inertia, it is difficult to control the temperature of the gas input into the drying chamber after heating in a suitable range, which affects the heating effect of the material. Specifically, when the air inlet flow decreases, the air inlet temperature is easy to rise to overheat, and the material is easy to denature and damage when contacting with the overheated gas; when the air inlet flow increases, the gas temperature is easy to be low, which will have a cooling effect on the material. INVENTION CONTENTS

[0005] The utility model aims at providing a vacuum dryer with constant temperature gas storage, which can control the temperature of the gas input into the drying chamber after heating in a suitable range.

[0006] In order to achieve the above-mentioned purpose, a vacuum dryer with constant temperature gas storage is provided, which comprises: a dryer main body, the dryer main body is provided with a drying chamber and an air extraction assembly, the air extraction assembly is communicated with the drying chamber; a constant temperature gas tank, the constant temperature gas tank comprises a tank body and a first heating assembly arranged on the tank body, the outlet end of the tank body is communicated with the drying chamber; a second heating assembly, the second heating assembly is communicated with the inlet end of the tank body.

[0007] According to the vacuum dryer with constant-temperature gas storage, the first heating assembly comprises: two first uniform heating seats arranged oppositely, the two first uniform heating seats surrounding a mounting space, the tank body being arranged in the mounting space, and a first mounting groove being formed in the inner side wall of the first uniform heating seat; a first uniform heat pipe arranged in the first mounting groove; a first mounting seat connected to the outer side of the two first uniform heating seats, the inner side of the first mounting seat being provided with a first electric heating plate; and a first heat preservation layer arranged on the outer side of the first uniform heating seat and the first mounting seat.

[0008] According to the vacuum dryer with constant-temperature gas storage, the second heating assembly comprises: two second mounting seats arranged at intervals, the inner side of one of the second mounting seats being provided with a second electric heating plate; a second uniform heating seat clamped between the two second mounting seats, the second uniform heating seat being arranged in two and being attached to each other, the opposite sides of the two second uniform heating seats being provided with grooves, and the opposite sides of the two second uniform heating seats being provided with second mounting grooves; a heat conduction pipe arranged in the groove; a second uniform heat pipe, one end of the second uniform heat pipe being located in the second mounting groove on one of the second uniform heating seats, and the other end of the second uniform heat pipe being located in the second mounting groove on the other second uniform heating seat; and a second heat preservation layer arranged on the outer side of the two second mounting seats.

[0009] According to the vacuum dryer with constant-temperature gas storage, the heat conduction pipe is arranged in the shape of a snake.

[0010] According to the vacuum dryer with constant-temperature gas storage, the second heating assembly comprises: a gas inlet seat having a strip-shaped gas inlet cavity inside; a gas outlet seat having a strip-shaped gas outlet cavity inside; a middle plate arranged between the gas inlet seat and the gas outlet seat and having a plate-shaped middle cavity inside, the two ends of the middle cavity being communicated with the gas inlet cavity and the gas outlet cavity respectively; and a third electric heating plate arranged on the outer side of the middle plate and located between the gas inlet seat and the gas outlet seat.

[0011] According to the vacuum dryer with constant-temperature gas storage, the vacuum dryer further comprises a pressure reduction structure, the pressure reduction structure comprising a shell, one side of the shell being provided with a gas inlet port, the other side of the shell being provided with a plurality of gas outlet ports, the gas inlet port being communicated with the outlet end of the tank body, and each gas outlet port being communicated with the drying chamber.

[0012] According to the vacuum dryer with constant-temperature gas storage, the constant-temperature gas tank is arranged in two, and the vacuum dryer further comprises a reversing valve, the inlet end of the tank body and the second heating assembly being communicated with the reversing valve.

[0013] According to the vacuum dryer with constant-temperature gas storage, the inlet end of the tank body is provided with a gas inlet valve, and the outlet end of the tank body is provided with an exhaust valve.

[0014] According to the vacuum dryer with constant-temperature gas storage, the gas supplement pipeline is connected with the second heating assembly, and a one-way valve is arranged on the gas supplement pipeline.

[0015] Beneficial effects: In the scheme, the constant-temperature gas tank can pre-store gas at a constant temperature, and can input hot gas flow at a preset temperature range into the drying chamber as soon as the gas flow heating is started, the gas temperature fluctuates less affected by the flow, and the over-heating or over-cooling of the gas can be avoided to affect the material heating, the gas temperature after heating and input into the drying chamber can be controlled in a suitable range, and the material heating effect can be ensured.

[0016] The additional aspects and advantages of the present application will be partially given in the following description, partially will become obvious from the following description, or will be understood by the practice of the present application. BRIEF DESCRIPTION OF DRAWINGS

[0017] The present application will be further described below in combination with the drawings and embodiments;

[0018] Figure 1 is a structure diagram of the first embodiment of the present application;

[0019] Figure 2 is a sectional view of the pressure reduction structure;

[0020] Figure 3 is a sectional view of the constant-temperature gas tank;

[0021] Figure 4 is an A-direction view of one of the first heat-distribution seats;

[0022] Figure 5 is a sectional view of the second heating assembly;

[0023] Figure 6 is a B-direction view of one of the second heat-distribution seats;

[0024] Figure 7 is a structure diagram of the second embodiment of the present application;

[0025] Figure 8 is a structure diagram of another embodiment of the second heating assembly;

[0026] Figure 9 is Figure 8 a sectional view of the second heating assembly shown in the second embodiment. DETAILED DESCRIPTION

[0027] The detailed embodiments of the present application will be described in this part, and the preferred embodiments of the present application are shown in the drawings, the drawings are used to supplement the description of the text part, so that people can intuitively and visually understand each technical feature and the overall technical scheme of the present application, but it cannot be understood as a limitation on the protection scope of the present application.

[0028] In the description of the present application, it should be understood that the orientation description, such as the orientation or position relationship indicated by up, down, front, back, left, right and the like, is based on the orientation or position relationship shown in the drawings, and is only for the convenience of describing the present application and simplifying the description, and therefore cannot be understood as a limitation on the present application.

[0029] In the description of the present application, greater than, less than, more than and the like are understood as not including the number, and above, below and the like are understood as including the number. If the first and the second are described, it is only for the purpose of distinguishing technical features, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of indicated technical features or the sequence of indicated technical features.

[0030] In the description of the present application, unless otherwise explicitly limited, the words such as setting, installing and connecting should be understood in a broad sense, and the person skilled in the art can reasonably determine the specific meaning of the above words in the present application in combination with the specific content of the technical scheme.

[0031] Referring to Figures 1-6 The present application provides a kind of vacuum dryer with constant temperature gas storage, it includes dryer main body 10, constant temperature gas tank 20 and second heating assembly 40, dryer main body 10 is provided with drying chamber and exhaust component 11, exhaust component 11 is communicated with drying chamber, constant temperature gas tank 20 includes tank body 21 and the first heating assembly 22 of being arranged in tank body 21, the outlet end of tank body 21 is communicated with drying chamber, second heating assembly 40 is communicated with the inlet end of tank body 21. Wherein, exhaust component 11 can be vacuum pump and the like structure.

[0032] When working, high pressure gas is input into tank body 21 by second heating assembly 40, second heating assembly 40 heats high pressure gas, first heating assembly 22 can heat and keep warm the gas in tank body 21, so that the gas in tank body 21 maintains heating temperature, so that tank body 21 can store pressure gas at constant temperature;When the material in drying chamber needs to be heated by airflow, the gas in tank body 21 is introduced into drying chamber and contacted with material.

[0033] As the above structure, in the scheme, the constant temperature gas tank 20 is arranged, which can pre-store the gas at constant temperature, and when the gas flow heating is started, the hot gas flow at the preset temperature range can be input into the drying chamber immediately, the gas temperature fluctuation caused by the flow is small, the over-heating or over-cooling of the gas affecting the material heating is avoided, the gas temperature after heating and input into the drying chamber can be controlled in the appropriate range, and the material heating effect is ensured.

[0034] Specifically, in the embodiment, the first heating assembly 22 includes a first uniform heating seat 221, a first uniform heat pipe 222, a first mounting seat 223 and a first heat preservation layer. The first uniform heating seat 221 is arranged oppositely in two, and an installation space is formed between the two first uniform heating seats 221. The tank body 21 is arranged in the installation space, and a first mounting groove 2211 is formed in the inner side wall of the first uniform heating seat 221. The first uniform heat pipe 222 is arranged in the first mounting groove 2211. The first mounting seat 223 is connected to the outer side of the two first uniform heating seats 221. The inner side of the first mounting seat 223 is provided with a first electric heating plate 224. The first heat preservation layer is arranged on the outer side of the first uniform heating seat 221 and the first mounting seat 223. The first electric heating plate 224 is attached to the first uniform heating seat 221 and the first uniform heat pipe 222, or a heat conducting layer is arranged between the first electric heating plate 224, the first uniform heating seat 221 and the first uniform heat pipe 222.

[0035] The first mounting seat 223 is locked with the two first uniform heating seats 221 by the first bolt 71, so as to limit the separation of the two first uniform heating seats 221. The heat generated by the first electric heating plate 224 is conducted to the first uniform heating seat 221 and the first uniform heat pipe 222, and the heat is quickly conducted and uniformly distributed in the first uniform heating seat 221 by the first uniform heat pipe 222, so as to uniformly heat the tank body 21 in a large area, avoid uneven heating of the tank body 21, and optimize the heating effect.

[0036] In the embodiment, the pressure reducing structure 30 is further included, so that the outlet end of the tank body 21 is communicated with the drying chamber through the pressure reducing structure 30. The pressure reducing structure 30 includes a shell 31, which has a gas inlet 32 on one side and a plurality of gas outlets 33 on the other side. The gas inlet 32 of the shell 31 is used to communicate with the outlet end of the gas tank, and the gas outlet 33 of the shell 31 is used to communicate with the drying chamber. The pressure reducing structure 30 can expand and reduce the pressure of the gas output by the tank body 21, so that the gas is uniformly input into the drying chamber. In addition, the pressure reducing structure 30 can also be arranged as a pressure reducing valve and the like.

[0037] In the embodiment, the second heating assembly 40 comprises a second mounting base 41, a second heat base 42, a heat conduction pipe 43, a second heat pipe 44 and a second heat preservation layer 45. The second mounting base 41 is provided in two and arranged at intervals. The inner side of one of the second mounting bases 41 is provided with a second electric heating plate 46. The second heat base 42 is clamped between the two second mounting bases 41. The second heat base 42 is provided in two and attached. The opposite sides of the two second heat bases 42 are provided with grooves 421. The opposite sides of the two second heat bases 42 are provided with second mounting grooves 422. The heat conduction pipe 43 is arranged in the groove 421. One end of the second heat pipe 44 is located in the second mounting groove 422 on one of the second heat bases 42. The other end of the second heat pipe 44 is located in the second mounting groove 422 on the other second heat base 42. The second heat preservation layer 45 is arranged on the outer side of the two second mounting bases 41. The second electric heating plate 46 is attached to the second heat base 42 and the second heat pipe 44, or a heat conduction layer is arranged between the second electric heating plate 46 and the second heat base 42 and the second heat pipe 44.

[0038] The first electric heating plate 224 and the second electric heating plate 46 can adopt a PTC electric heating structure. The two second mounting bases 41 are connected by penetrating the second bolt 72 to clamp the two second heat bases 42. The second electric heating plate 46 conducts heat to the second heat base 42 and the second heat pipe 44. The heat is quickly conducted and uniformly distributed in the two second heat bases 42 through the second heat pipe 44. The heat conduction pipe 43 is uniformly and bidirectionally heated. The gas can be quickly and uniformly heated when passing through the heat conduction pipe 43. The heating effect is optimized. In addition, the heat conduction pipe 43 is arranged in a serpentine pipe structure to increase the heating.

[0039] As described above, the heat can be uniformly distributed by the first heat pipe 222 and the second heat pipe 44 to optimize the heat preservation / heating effect and reduce the number and arrangement area of the electric heating plates. The second heat pipe 44 can accelerate the conduction and uniform distribution of heat, improve the efficiency of heating and warming to constant, and reduce the start-up preheating time.

[0040] The embodiment also comprises a gas supplement pipeline 60 connected with the second heating assembly 40, and the gas supplement pipeline 60 is provided with a one-way valve 61. The gas supplement pipeline 60 is used to connect with a high-pressure gas source to input high-pressure gas to the second heating assembly 40. The inlet end of the tank body 21 is provided with an air inlet valve 211, and the outlet end of the tank body 21 is provided with an air outlet valve 212 for controlling the one-way air inlet of the tank body 21 through the air inlet valve 211 and the one-way air outlet through the air outlet valve 212.

[0041] The temperature of the gas in the tank body 21 during heat preservation can be set to be slightly higher than the air temperature heated by the dry room, so that the temperature of the gas expanded by pressure reduction is within the preset air flow heating temperature range.

[0042] Referring to Figure 7 Compared with the first embodiment, in the second embodiment, the reversing valve 50 is further included, and the constant-temperature gas tank 20 is provided with two tank bodies 21. Correspondingly, the tank body 21 is also provided with two. The inlet end of the two tank bodies 21 is communicated with the gas inlet 32, and the inlet end of the tank body 21 and the second heating assembly 40 are communicated with the reversing valve 50, so that the inlet end of the tank body 21 is communicated with the second heating assembly 40 through the reversing valve 50.

[0043] In work, the reversing valve 50 is controlled to switch the inlet end of the first tank body 21 to communicate with the second heating assembly 40, so that the heated gas is input into the tank body 21 and kept constant temperature. After the tank body 21 completes the input of the gas and keeps constant temperature, the corresponding exhaust valve 212 can be opened to input the gas into the drying chamber. The reversing valve 50 is controlled to switch the inlet end of the second tank body 21 to communicate with the second heating assembly 40, so that the heated gas is input into the tank body 21 and kept constant temperature. In this way, the first tank body 21 and the second tank body 21 can alternately inflate and keep constant temperature, and input the gas into the drying chamber. When the vacuum dryer needs to work continuously for a long time, it can ensure that the gas with temperature in the preset range can be continuously input into the drying chamber.

[0044] The reversing valve 50, the gas inlet valve 211 and the exhaust valve 212 can all adopt an electric control structure, so that the action switching and opening and closing thereof can be controlled by a program.

[0045] When the vacuum dryer works, the exhaust assembly 11 can be used to work, and the exhaust valve 212 can be opened to input the gas into the drying chamber at the same time. By controlling the inlet and outlet flow of the drying chamber, the air pressure in the drying chamber can be kept at a low level. This working mode can ensure that the water in the material has a lower boiling point, and the gas can take away the water while heating the material, so as to accelerate the drying process.

[0046] Referring to Figures 8-9 In some embodiments, the second heating assembly 40 includes a gas inlet seat 47, a gas outlet seat 48, an intermediate plate 49 and a third electric heating plate. The gas inlet seat 47 has a strip-shaped gas inlet cavity 471 inside, the gas outlet seat 48 has a strip-shaped gas outlet cavity 481 inside, the intermediate plate 49 is arranged between the gas inlet seat 47 and the gas outlet seat 48, the intermediate plate 49 has a plate-shaped intermediate cavity 491 inside, the two ends of the intermediate cavity 491 are communicated with the gas inlet cavity 471 and the gas outlet cavity 481 respectively, and the third electric heating plate is arranged outside the intermediate plate 49 and between the gas inlet seat 47 and the gas outlet seat 49. The thickness of the gas inlet seat 47 and the gas outlet seat 48 is greater than the thickness of the intermediate plate 49, so that the surfaces of the three form a concave groove, and the third electric heating plate is located in the concave groove. The side of the gas inlet seat 47 away from the intermediate plate 49 is provided with a gas outlet, and the side of the gas outlet seat 48 away from the intermediate plate 49 is provided with a gas outlet.

[0047] In working, the gas enters the gas inlet cavity 471 and is dispersed, and then flows to the gas outlet cavity 481 along the middle cavity 491, the gas has a large heated area in the middle cavity 491, the gas is heated quickly and uniformly.

[0048] The utility model embodiment has been explained in detail above in combination with the drawings, but the utility model is not limited to the above-mentioned embodiments, and various changes can be made within the knowledge range possessed by the ordinary skilled in the art without departing from the utility model purposes.

Claims

1. A vacuum dryer with constant-temperature gas storage, characterized in that, include: The dryer body is provided with a drying chamber and an exhaust assembly, and the exhaust assembly is connected to the drying chamber. A constant temperature gas cylinder, the constant temperature gas cylinder including a cylinder body and a first heating component disposed in the cylinder body, the outlet end of the cylinder body being connected to a drying chamber; The second heating component is connected to the inlet end of the tank.

2. A vacuum dryer with constant-temperature gas storage according to claim 1, characterized in that, The first heating component includes: Two first heat-spreading seats are provided and arranged opposite each other. The two first heat-spreading seats form an installation space. The tank is set in the installation space, and the inner sidewall of the first heat-spreading seat is provided with a first installation groove. The first uniform-temperature heat pipe is disposed in the first mounting groove; A first mounting base is connected to the outer side of the two first heat-equalizing bases, and a first electric heating plate is provided on the inner side of the first mounting base. The first insulation layer is disposed on the outside of the first heat-spreading base and the first mounting base.

3. A vacuum dryer with constant-temperature gas storage according to claim 1, characterized in that, The second heating component includes: The second mounting base is configured as two and arranged at intervals, and a second heating plate is provided on the inner side of one of the second mounting bases; The second heat-spreading seat is sandwiched between the two second mounting seats. The two second heat-spreading seats are arranged in pairs and attached to each other. Grooves are provided on the opposite sides of the two second heat-spreading seats, and second mounting slots are provided on the opposite sides of the two second heat-spreading seats. A heat pipe is disposed within the groove; The second heat pipe has one end located in the second mounting groove on one of the second heat-spreading bases and the other end located in the second mounting groove on another second heat-spreading base. The second insulation layer is located on the outside of the two second mounting bases.

4. A vacuum dryer with constant-temperature gas storage according to claim 3, characterized in that, The heat pipe is configured as a serpentine tube.

5. A vacuum dryer with constant-temperature gas storage according to claim 1, characterized in that, The second heating component includes: The air intake base has a strip-shaped air intake chamber inside; The vent seat has a strip-shaped vent chamber inside; An intermediate plate is disposed between the air inlet seat and the air outlet seat, and has a plate-shaped intermediate cavity inside, with the two ends of the intermediate cavity connected to the air inlet cavity and the air outlet cavity respectively. The third heating plate is located on the outside of the middle plate, between the air inlet and the air outlet.

6. A vacuum dryer with constant-temperature gas storage according to claim 1, characterized in that, It also includes a pressure-reducing structure, which includes a shell, an air inlet on one side of the shell and multiple air outlets on the other side, the air inlet being connected to the outlet end of the tank, and each air outlet being connected to the drying chamber.

7. A vacuum dryer with constant-temperature gas storage according to claim 1, characterized in that, The constant temperature gas tank is configured as two, and also includes a reversing valve. The inlet end of the tank and the second heating component are both connected to the reversing valve.

8. A vacuum dryer with constant-temperature gas storage according to claim 1 or 6, characterized in that, The tank is equipped with an air inlet valve at the inlet end and an air outlet valve at the outlet end.

9. A vacuum dryer with constant-temperature gas storage according to claim 1, characterized in that, It also includes a gas supply pipe, which is connected to the second heating component and is equipped with a one-way valve.

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