An internal circulation type thermostat

Abstract

The application discloses an internal circulation type thermostat, which comprises a box body, a water jacket (1) arranged in the box body, a heat insulation layer (2) connected to the outside of the water jacket (1), a constant temperature cavity formed in the inside of the water jacket (1), a circulating water pipe connected to the water jacket (1), and a temperature control unit connected to the circulating water pipe, wherein the inside of the constant temperature cavity is provided with a baffle group, the inside of the baffle group forms a storage cavity (3), a spacing is left between the baffle group and the inner wall of the constant temperature cavity and a wind guide opening (4) is formed, and the storage cavity (3) and the wind guide opening (4) are connected in a head-to-tail mode and form a uniform temperature channel for circulating ventilation. The application can make the air in the constant temperature cavity circulate in a specified flow direction and improve the heat exchange effect of the edge region and the central region of the constant temperature cavity.

Description

TECHNICAL FIELD

[0001] The present application relates to an oven, in particular to an oven with internal circulation. BACKGROUND

[0002] The oven is a testing device for testing the performance of product materials at constant temperature. The existing oven, as shown in patent 201110038545.8, is mainly composed of a heat conduction layer and a temperature control device. The heat conduction layer uses water or air as a medium for temperature control, so that the inner constant temperature cavity maintains a constant temperature under the heat transfer of the heat conduction layer. At the same time, the heat conduction layer and the temperature control device are in communication with each other and the medium is in a circulating flow state. The temperature control device heats or cools the medium based on the temperature in the constant temperature cavity, so as to keep the temperature in the constant temperature cavity constant by adjusting the temperature of the medium in the heat conduction layer.

[0003] Due to the heat transfer and temperature control of the constant temperature cavity by the heat conduction layer, the temperature of the constant temperature cavity near the heat conduction layer is more easily affected by the heat conduction layer, and the temperature value tends to be closer to the medium temperature in the heat conduction layer. The heat transfer effect of the center part of the constant temperature cavity is relatively weakened due to its relatively far distance from the heat conduction layer region, resulting in a larger temperature deviation in this region than in the edge region. Based on this structural defect, the current treatment method is to install a circulating fan in the constant temperature cavity, so as to change the air in the constant temperature cavity from a static state to a flowing state by using the circulating fan, and to mix and replace the air near the heat conduction layer region and the air near the center region of the constant temperature cavity during the flowing process, thereby improving the temperature uniformity of the constant temperature cavity as a whole.

[0004] However, the defect of this structure is that, since the constant temperature cavity is generally a completely sealed cuboid structure in normal state, and the circulating fan needs to be placed at the edge position of the constant temperature cavity during installation; this makes the air in the constant temperature cavity not to realize efficient heat exchange between the edge region and the center region with a specified air flow direction under the action of the circulating fan, but tends to flow freely in a disordered state in the constant temperature cavity, thereby reducing the uniform temperature effect of the constant temperature cavity.

[0005] Therefore, the temperature control method of the existing oven has the problem of low temperature uniformity of the constant temperature cavity. SUMMARY

[0006] The purpose of the present application is to provide an oven with internal circulation. It can make the air in the constant temperature cavity circulate in a specified flow direction, and improve the heat exchange effect between the edge region and the center region of the constant temperature cavity.

[0007] The technical scheme of the present application: an inner circulating constant temperature box, comprising a box body, a water jacket is arranged in the box body, a heat insulation layer is connected to the outside of the water jacket, a constant temperature cavity is formed in the inside of the water jacket, a circulating water pipe is connected to the water jacket, a temperature control unit is connected to the circulating water pipe, a partition group is arranged on the inside of the constant temperature cavity, a storage cavity is formed on the inside of the partition group, a spacing is left between the partition group and the inner wall of the constant temperature cavity and a wind guide opening is formed, the storage cavity and the wind guide opening are connected head to tail and form a uniform temperature channel for circulating ventilation; the partition group comprises a bottom plate which is detachably connected to the bottom of the constant temperature cavity, a storage table is formed in the middle of the bottom plate, side plates are connected to the two sides of the bottom plate through a guide fixing assembly, a top plate is placed on the top of the two side plates, the top plate and the side plates are connected to each other through a first clamping assembly, an inner plate is detachably connected to the inside of the top plate, the two sides of the inner plate and the inner ends of the side plates are attached to each other, a protective net is connected to the middle of the inner plate, a circulating fan is connected to the inside of the constant temperature cavity on the inside of the protective net, and the lower end of the inner plate is connected to the bottom plate through a second clamping assembly.

[0008] In the aforementioned inner circulating constant temperature box, the bottom of the bottom plate is connected to the constant temperature cavity through a support seat, a first screw is arranged in the middle of the support seat, and the upper end of the first screw penetrates through the bottom plate and is connected to an adapter nut.

[0009] In the aforementioned inner circulating constant temperature box, the guide fixing assembly comprises guide grooves arranged side by side on the two sides of the side plate, the adapter nut is slidably connected in the guide groove, a fixed plate is connected to the top of the guide groove, and the middle of the fixed plate is threadedly connected to the adapter nut through a second screw.

[0010] In the aforementioned inner circulating constant temperature box, support pipes are arranged side by side on the two sides of the side plate, the two ends of the support pipes are attached to the bottom plate and the top plate respectively, the guide groove is arranged at the bottom of the support pipe, and an operation port matched with the guide groove is arranged on one side of the support pipe.

[0011] In the aforementioned inner circulating constant temperature box, the first clamping assembly comprises a first screw threadedly connected to the top of the support pipe, one end of the first screw penetrates through the side plate and is attached to the top plate, and the two sides of the top plate are attached to the first screw through first folded edges.

[0012] In the aforementioned inner circulating constant temperature box, guide pipes are arranged on the two sides of the bottom of the top plate, and the two ends of the guide pipes are attached to the outer walls of the two support pipes respectively.

[0013] In the aforementioned inner circulating constant temperature box, the upper end of the inner plate extends above the top plate and is provided with a second folded edge, and the second folded edge and the top plate are fixedly connected.

[0014] In the aforementioned inner circulating constant temperature box, a flexible rubber pad is arranged between the second folded edge and the top plate, a third folded edge is arranged at the inner end of the bottom plate, and the second clamping assembly comprises a second screw arranged at the bottom of the inner plate, and the end of the second screw penetrates through the inner plate and is threadedly connected to the third folded edge.

[0015] Compared with the prior art, the present application has the following characteristics:

[0016] (1) The present application is provided with a baffle group arranged in the constant-temperature cavity, so that the inner and outer sides of the baffle group can form a first-end-to-second-end air guide opening and a storage cavity, so that when the circulating fan is in operation, the air in the storage cavity can pass through the protective net into the air guide opening and flow to the other end of the air guide opening and then return to the storage cavity, thereby realizing the circulation and exchange of the air in the air guide opening and the storage cavity; at the same time, the air in the air guide opening is relatively closer to the water jacket, so that the temperature of the air is closer to the set temperature, thereby enabling the present application to continuously charge the air in the air guide opening into the storage cavity and improve the control accuracy of the temperature in the storage cavity.

[0017] (2) The structure of the baffle group is limited, so that the baffle group can be detachably connected by a plurality of single boards, thereby facilitating the installation and later disassembly of the baffle group by the operating personnel; on this basis, the mounting structure of the side plate is limited, so that the side plate can also adjust its transverse position during installation, i.e., the operating personnel can adjust the width of the air guide opening between the side plate and the constant-temperature cavity; under the action of the structure, the operating personnel can change the exchange amount of the air in the baffle group by adjusting the width of the air guide opening, thereby improving the control accuracy of the temperature in the storage cavity and preventing the influence of excessive wind force on the test object;

[0018] (3) The connecting structure between the side plate, the top plate and the inner plate is limited, so that during the transverse positioning of the side plate, the side plate and the top plate can be supported by the support pipe, and the two are separated from the bottom plate, so that the side plate is in a non-limited state, facilitating the operation of the operating personnel; after the positioning of the side plate is completed, the lower end of the side plate can be fixed by the guide fixing assembly to avoid the transverse movement of the side plate during subsequent use, and the inner plate can exert a downward extrusion force on the top plate after installation by the second clamping assembly, so that the upper end of the side plate is pressed by the top plate to avoid the problems of shaking and deviation of the side plate; under the above cooperation, the present application can realize the overall fixation of the baffle group when the side plate is in any transverse position, and the baffle group is in a closed state at the connection of each plate, thereby improving the installation stability of the baffle group and the air guiding effect;

[0019] Therefore, the present application can make the air in the constant-temperature cavity circulate in a specified flow direction and improve the heat exchange effect of the edge region and the center region of the constant-temperature cavity. BRIEF DESCRIPTION OF DRAWINGS

[0020] Figure 1 is a front view of the present application;

[0021] Figure 2 is Figure 1 A enlarged view of

[0022] Figure 3 is Figure 1 a B direction enlarged view of

[0023] Figure 4 is a side view of the present application;

[0024] Figure 5 is a C direction enlarged view of Figure 4 .

[0025] The signs in the drawings are: 1- water jacket, 2- heat insulation layer, 3- object cavity, 4- air guide opening, 5- bottom plate, 6- side plate, 7- top plate, 8- inner plate, 9- protective net, 10- circulating fan, 11- support seat, 12- first screw rod, 13- adapter nut, 14- guide groove, 15- fixed plate, 16- second screw rod, 17- support pipe, 18- first screw, 19- first folding edge, 20- second folding edge, 21- flexible rubber pad, 22- third folding edge, 23- second screw. DETAILED DESCRIPTION

[0026] The present application will be further described below in conjunction with the drawings and examples, but not as the basis for limiting the present application.

[0027] Example. An internal circulation type thermostat, as shown in Figure 1 , comprising a box body, a frame structure water jacket 1 is arranged in the box body, a heat insulation layer 2 is connected to the outside of the water jacket 1, a constant temperature cavity is formed in the inside of the water jacket 1, a temperature sensor is arranged in the constant temperature cavity, a placing opening is arranged on one side of the constant temperature cavity, a box door is connected to the box body outside the placing opening, a closed space is formed in the constant temperature cavity after the box door is closed, a circulating water pipe is connected to the water jacket 1, a temperature control unit is connected to the circulating water pipe, a partition plate group is arranged on the inside of the constant temperature cavity, an object cavity 3 is formed on the inside of the partition plate group, a spacing is left between the partition plate group and the inner wall of the constant temperature cavity and an air guide opening 4 is formed, the object cavity 3 and the air guide opening 4 are connected in series and form a uniform temperature channel for circulating ventilation; the partition plate group comprises a bottom plate 5 which is detachably connected to the bottom of the constant temperature cavity, an object table is formed in the middle of the bottom plate 5, side plates 6 are connected to the two sides of the bottom plate 5 through guide fixing assemblies, the guide fixing assemblies are used for sliding limiting and fixing the side plates 6, a top plate 7 is placed on the top of the two side plates 6, an LED lamp can be installed in the middle of the top plate 7, the top plate 7 and the side plates 6 are connected to each other through a first clamping assembly, an inner plate 8 is detachably connected to the inside of the top plate 7, the two sides of the inner plate 8 and the inner ends of the side plates 6 are mutually adhered, a protective net 9 is connected to the middle of the inner plate 8, a circulating fan 10 is connected to the constant temperature cavity on the inside of the protective net 9, the lower end of the inner plate 8 is connected to the bottom plate 5 through a second clamping assembly.

[0028] The distance between the side plate 6 and the constant temperature cavity can be adjusted as required, so that the manufacturer can customize the constant temperature box based on different user requirements, and can control the width of the air guide opening 4 and the rotating speed of the circulating fan 10 to adjust the ventilation volume, air speed and heat exchange effect, and then balance the temperature control accuracy, operation noise, test object stability and the like.

[0029] The bottom of the bottom plate 5 is connected to the constant temperature cavity through a support seat 11, the support seat 11 can be fixed to the constant temperature cavity by buckling connection, threaded connection or gluing, the middle part of the support seat 11 is provided with a first screw 12, the upper end of the first screw 12 penetrates through the bottom plate 5 and is connected with an adapter nut 13, the adapter nut 13 can be a knurled nut or an embedded round nut.

[0030] The guide fixing assembly includes guide grooves 14 arranged side by side on both sides of the side plate 6, the adapter nut 13 is slidably connected in the guide groove 14, and the top of the guide groove 14 is connected with a fixed plate 15, and the middle part of the fixed plate 15 is threadedly connected with the adapter nut 13 through a second screw 16.

[0031] The side plate 6 is provided with a support pipe 17 arranged side by side on both sides, the two ends of the support pipe 17 are respectively attached to the bottom plate 5 and the top plate 7, the guide groove 14 is arranged at the bottom of the support pipe 17, and one side of the support pipe 17 is provided with an operation port matched with the guide groove 14.

[0032] The first clamping assembly includes a first screw 18 threadedly connected to the top of the support pipe 17, one end of the first screw 18 penetrates through the side plate 6 and is attached to the top plate 7, and the two sides of the top plate 7 are attached to the first screw 18 through a first folded edge 19.

[0033] The bottom of the top plate 7 is provided with a guide pipe, the two ends of the guide pipe are respectively attached to the outer walls of the two support pipes 17, and the guide pipe and the support pipe 17 are arranged in front of and behind each other and leave a gap for the horizontal movement of the side plate 6.

[0034] The upper end of the inner plate 8 extends above the top plate 7 and is provided with a second folded edge 20, and the second folded edge 20 and the top plate 7 are fixedly connected through rivets or other conventional connecting pieces.

[0035] The second folded edge 20 and the top plate 7 are provided with a flexible rubber pad 21, the inner end of the bottom plate 5 is provided with a third folded edge 22, and the second clamping assembly includes a second screw 23 located at the bottom of the inner plate 8, the end of the second screw 23 penetrates through the inner plate 8 and is threadedly connected with the third folded edge 22.

[0036] The working principle of the present application is as follows: when installing, the operator first fixes the bottom plate 5 at the bottom of the constant-temperature cavity through the cooperation of the support seat 11 and the adapter nut 13, and then connects the side plate 6, the top plate 7 and the inner plate 8 to form a frame structure and places them together on the bottom plate 5. After the baffle group is formed, the operator can adjust the lateral position of the side plate 6 according to the need, so as to change the spacing distance between the side plate 6 and the constant-temperature cavity. During the lateral movement of the side plate 6, the top plate 7 and the inner plate 8 are supported by the support pipe 17 and are not directly connected with the bottom plate 5, so that they do not interfere with the lateral movement of the side plate 6, that is, the lateral movement effect of the side plate 6 is ensured. At the same time, through the structural cooperation of the guide groove 14 and the adapter nut 13, the side plate 6 can also be limited, so that the side plate 6 will not deviate during the lateral movement.

[0037] After the side plate 6 is laterally moved to the position, the operator tightens the fixed plate 15 through the second screw 16, so that the fixed plate 15 fixes the side plate 6 and the bottom plate 5 after being tightened, and ensures that the side plate 6 and the bottom plate 5 are perpendicular to each other. After the side plate 6 is fixed, the operator pulls the inner plate 8 downward and screws the second screw 23, so that the inner plate 8 can exert a downward extrusion force on the top plate 7 through the flexible rubber pad 21 after being fixed, so as to press the upper end of the side plate 6 by the top plate 7, avoiding the inclination or deviation of the side plate 6. After the top plate 7 is pressed, the operator immediately screws the first screw 18 and makes it fit with the first folded edge 19, so as to limit the lateral position of the top plate 7 by the two first screws 18, avoiding the movement of the top plate 7. Through the above cooperation, the baffle group can be connected and fixed after the side plate 6 is laterally moved to the position, and the joint thereof can be sealed, so as to ensure the stability of the circulating flow of air in the uniform-temperature channel.

[0038] When in use, the circulating fan 10 rotates to drive the air in the storage cavity 3 to enter the air guide opening 4 from the protective net 9; the air flows to the gap around the baffle group after entering the air guide opening 4, and then moves along the air guide opening 4 to the other end of the baffle group and then enters the storage cavity 3 again, so as to realize the exchange of air in the air guide opening 4 and the storage cavity 3. Since the air in the air guide opening 4 around is close to the water jacket 1, the temperature thereof is relatively closer to the temperature of the constant-temperature medium in the water jacket 1; and through the circulating flow of air in the uniform-temperature channel, the air in the air guide opening 4 and the storage cavity 3 can be exchanged and mixed with each other, so that the temperature in the storage cavity 3 and the temperature in the air guide opening 4 tend to be consistent, and the temperature uniformity of different regions in the constant-temperature cavity is improved.

Claims

1. An internal circulation type thermostat, comprising a box, a water jacket (1) is arranged in the box, an external heat insulation layer (2) is connected to the water jacket (1), a constant temperature cavity is formed in the water jacket (1), a circulating water pipe is connected to the water jacket (1), and a temperature control unit is connected to the circulating water pipe, characterized in that: The inner side of the constant temperature cavity is provided with a baffle group, the inner side of the baffle group forms a storage cavity (3), a spacing is left between the baffle group and the inner wall of the constant temperature cavity and forms an air guide opening (4), the storage cavity (3) and the air guide opening (4) are connected in a head-to-tail manner and form a uniform temperature channel for circulating ventilation; the baffle group comprises a bottom plate (5) detachably connected to the bottom of the constant temperature cavity, side plates (6) connected to the two sides of the bottom plate (5) through a guide fixing assembly, the guide fixing assembly is used for sliding limiting and fixing the side plates (6), a top plate (7) placed on the top of the two side plates (6), the top plate (7) and the side plates (6) are connected to each other through a first clamping assembly, an inner plate (8) detachably connected to the inner side of the top plate (7), the two sides of the inner plate (8) and the inner ends of the side plates (6) are mutually attached, a protective net (9) connected to the middle part of the inner plate (8), a circulating fan (10) connected to the inner side of the constant temperature cavity on the inner side of the protective net (9), and the lower end of the inner plate (8) is connected to the bottom plate (5) through a second clamping assembly. The bottom of the bottom plate (5) is connected to the constant temperature cavity through a support seat (11), and the middle part of the support seat (11) is provided with a first screw rod (12), the upper end of the first screw rod (12) penetrates through the bottom plate (5) and is connected with an adapter nut (13). The guide fixing assembly comprises guide grooves (14) arranged side by side on support pipes (17) arranged on the two sides of the side plates (6), the adapter nut (13) is slidably connected in the guide grooves (14), the top of the guide groove (14) is connected with a fixed plate (15), and the middle part of the fixed plate (15) is threadedly connected with the adapter nut (13) through a second screw rod (16). The two sides of the side plate (6) are provided with side-by-side support pipes (17), the two ends of the support pipe (17) are respectively attached to the bottom plate (5) and the top plate (7), the guide groove (14) is arranged at the bottom of the support pipe (17), and one side of the support pipe (17) is provided with an operation opening matched with the guide groove (14). The first clamping assembly comprises a first screw (18) threadedly connected at the top of the support pipe (17), one end of the first screw (18) penetrates through the side plate (6) and is attached to the top plate (7), and the two sides of the top plate (7) are attached to the first screw (18) through first folded edges (19). The upper end of the inner plate (8) extends above the top plate (7) and is provided with a second folded edge (20), and the second folded edge (20) and the top plate (7) are fixedly connected; A flexible rubber pad (21) is arranged between the second folded edge (20) and the top plate (7), the inner end of the bottom plate (5) is provided with a third folded edge (22), and the second clamping assembly comprises a second screw (23) arranged at the bottom of the inner plate (8), and the end of the second screw (23) penetrates through the inner plate (8) and is threadedly connected with the third folded edge (22).

2. The inner-circulation thermostat according to claim 1, characterized in that: The bottom of the top plate (7) is provided with a guide pipe, and the two ends of the guide pipe are respectively attached to the outer walls of the two support pipes (17).

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