TWM511035U - Hot wind constant temperature outer circulation control system - Google Patents

Description

Hot air constant temperature external circulation control system

The present invention relates to a hot air circulation control system, and more particularly to a hot air constant temperature external circulation control system.

Referring to FIG. 1 , a hot air circulation control system 1 includes a hot air blower 11 , a heat exchanger 12 connected to the hot air blower 11 , and a air supply duct connected to the hot air blower 11 and spaced apart from the heat exchanger 12 . 13, and a return duct 14 connected to the heat exchanger 12.

The hot air circulation control system 1 outputs a hot air through the hot air blower 11 and is blown to the drying space (not shown) via the air supply duct 13, and the circulating hot air flows through the return air duct 14 to the heat exchange. The heat exchanger 11 and the hot air blower 11 are repeated for the next cycle. However, when the drying operation is to be suspended, the continuous hot air may cause the product on the production line to overheat. To avoid the above phenomenon, it is often only closed. The manner of the hot air blower 11 reduces the temperature of the drying space. This method causes the worker to wait for the machine to restart the hot machine time when the drying operation is to be performed again, thereby reducing the working efficiency.

Therefore, the purpose of the present invention is to provide a hot air outside temperature control that effectively prevents overheating of the product, improves work efficiency, and saves energy. System.

Therefore, the novel hot air constant temperature external circulation control system comprises a hot air fan capable of outputting a hot air, a heat exchanger connected to the hot air fan and a air duct unit.

The air duct unit includes a air supply duct connected to the heat blower and spaced apart from the heat exchanger, a return air duct connecting the heat exchanger, and a circulating air duct connecting the air supply duct and the return air duct.

The valves are respectively disposed at two ends of the circulating air duct and are switchable between an inner circulation mode and an outer circulation mode with respect to the circulating air duct.

When the inner circulation mode is set, the valves close the circulation duct, so that the hot air cannot pass through the circulation duct, and flow between the air supply duct, the return air duct, the heat exchanger and the hot air blower, When the outer circulation mode is set, the valves respectively close the external opening of the air supply duct and the return air duct, so that the hot air is in the air supply duct, the circulating air duct, the return air duct, the heat exchanger and the hot air Flow between machines.

The utility model has the advantages that: by controlling the switching of the valves between the inner circulation mode and the outer circulation mode with respect to the circulation air duct, the product can be effectively prevented from overheating, and the working efficiency is improved, and at the same time, the energy saving effect is achieved. .

2‧‧‧Hot air blower

21‧‧‧ body

211‧‧‧ top wall

212‧‧‧Walls

22‧‧‧air outlet

23‧‧‧Air inlet

3‧‧‧ heat exchanger

4‧‧‧Air duct unit

41‧‧‧Air duct

411‧‧‧ first ascending

412‧‧‧First horizontal section

413‧‧‧ first downslope

42‧‧‧Return air duct

421‧‧‧ second ascending

422‧‧‧second horizontal section

423‧‧‧ second falling section

43‧‧‧Circular duct

5‧‧‧ Valve

9‧‧‧ oven

X‧‧‧ horizontal direction

Other features and effects of the present invention will be apparent from the following description of the drawings, wherein: FIG. 1 is a top plan view illustrating a conventional hot air circulation control system. FIG. 2 is a front view showing an embodiment of the present hot air constant temperature external circulation control system; FIG. 3 is a side view showing the embodiment disposed on an oven; FIG. 4 is a top view illustrating The two valves of this embodiment are set to an inner circulation mode; FIG. 5 is a top plan view showing the valves of the embodiment set to an outer cycle mode; and FIG. 6 is a top plan view illustrating the same of the embodiment. The valve is set to half open mode.

Referring to FIG. 2, FIG. 3 and FIG. 4, an embodiment of the present hot air constant temperature external circulation control system is suitable for being disposed on an oven 9. The embodiment comprises a hot air blower 2, a heat exchanger 3, and a air duct unit. 4 and 2 valves 5.

The hot air blower 2 includes a body 21 that can output a hot air, an air outlet 22, and an air inlet 23. The body 21 has a top wall 211 and a peripheral wall 212. The air outlet 22 is formed on the top wall 211. The air inlet 23 is formed on the peripheral wall 212.

The heat exchanger 3 is connected to the air inlet 23 of the hot air fan 2 for adjusting the temperature of the hot air.

The duct unit 4 includes a blow duct 41 connected to the air outlet 22 of the hot air fan 2 and spaced apart from the heat exchanger 3, a return duct 42 connecting the heat exchanger 3, and a duct connected to the air duct. 41 and the return duct Circulating duct 43 of 42.

The air supply duct 41 has a first rising section 411 extending upward from the air outlet 22 of the hot air blower 2, and a first horizontal section 412 extending forward from a top edge of the first rising section 411 in a horizontal direction X. And a first descending section 413 extending downward from a leading edge of the first horizontal section 412.

The return duct 42 has a second rising section 421 extending upward from an end of the heat exchanger 3 away from the air inlet 23, and a forward edge extending from the top edge of the second rising section 421 in the horizontal direction X. a second horizontal section 422 and a second descending section 423 extending downward from a leading edge of the second horizontal section 422. The first descending section 413 and the second descending section 423 are connected to the oven 9.

The two ends of the circulation duct 43 are respectively connected to the first horizontal section 412 of the air supply duct 41 and the second horizontal section 422 of the return duct 42.

The valves 5 are respectively pivoted at opposite ends of the circulation duct 43 and are switchable between the inner circulation mode and the outer circulation mode with respect to the circulation duct 43.

Referring to FIG. 3 and FIG. 4, when the drying operation (not shown) in the oven 9 is performed by using the embodiment, the valves 5 are set in the inner circulation mode. At this time, the valves are The circulation duct 43 is closed, and the hot air outputted by the hot air fan 2 is circulated between the air supply duct 41, the drying space, the return air duct 42, the heat exchanger 3, and the heat blower 2, And the process does not flow through the circulation duct 43 to provide a stable cycle of thermal convection.

Referring to Figure 5, when the drying operation is to be stopped briefly, the staff does not The hot air fan 2 and the heat exchanger 3 must be turned off, and only the valves 5 are rotated to close the external openings of the air supply duct 41 and the return air duct 42 respectively. At this time, the valves 5 are located in the outer circulation mode. The hot air can be circulated between the air supply duct 41, the circulating air duct 43, the return air duct 42, the heat exchanger 3, and the hot air blower 2, and the product on the production line can be effectively prevented from overheating. When the drying operation is performed, only the valve 5 is set to the inner circulation mode as shown in FIG. 4, that is, the hot air can be directly introduced into the drying space, and the hot air blower 2 is omitted in the process. The heat exchanger 3 needs to wait for the hot air to heat up, thereby improving work efficiency and achieving energy saving effect.

Referring to FIG. 6, the valves 5 can also be set to a half-open mode between the inner circulation mode and the outer circulation mode. In the half-open mode, the valves 5 do not completely close the air supply duct 41, and the return air. The tube 42 and one of the circulating ducts 43 allow the hot air to partially pass through the circulating duct 43 during the cycle by controlling the opening angle of the valves 5 to indirectly control the drying. The temperature of the space does not need to directly set the temperature at which the hot air is output by the hot air blower 2, and can effectively save the working time of the worker and improve the working efficiency without the need to accurately control the temperature.

In summary, the present invention can be used to set the valve 5 and the circulating air duct 43. When normally used to heat the drying space, the valves 5 can be set to the inner circulation mode. In the dry operation, only the valve 5 is set to the outer circulation mode, that is, the hot air cannot be flown to the drying space to prevent the product in the drying space from being overheated, and to be re-applied. When the drying operation is performed, the valves 5 can be directly switched to the internal circulation mode to continue the drying operation, thereby effectively preventing the product from overheating, improving work efficiency and saving energy, so that the purpose of the present invention can be achieved.

However, the above description is only for the embodiments of the present invention, and the scope of the present invention cannot be limited thereto, that is, the simple equivalent changes and modifications made by the present patent application scope and the contents of the patent specification are still It is within the scope of this new patent.

2‧‧‧Hot air blower

3‧‧‧ heat exchanger

4‧‧‧Air duct unit

41‧‧‧Air duct

411‧‧‧ first ascending

412‧‧‧First horizontal section

413‧‧‧ first downslope

42‧‧‧Return air duct

421‧‧‧ second ascending

422‧‧‧second horizontal section

423‧‧‧ second falling section

43‧‧‧Circular duct

5‧‧‧ Valve

Claims (7)

The utility model relates to a hot air constant temperature external circulation control system, comprising: a hot air fan, which can output a hot air; a heat exchanger connected to the hot air fan; a air duct unit comprising a air supply connected to the heat blower and spaced apart from the heat exchanger a pipe, a return air pipe connected to the heat exchanger, and a circulating air pipe connecting the air supply pipe and the return air pipe; and two valves respectively pivoted at two ends of the circulating air pipe and opposite to the cycle The air duct is switched between an inner circulation mode and an outer circulation mode. When the inner circulation mode is set, the valves close the circulation air duct, so that the hot air cannot pass through the circulation air duct, and in the air supply duct, the Flowing between the return air duct, the heat exchanger and the heat blower, when the outer circulation mode is set, the valves respectively close the external opening of the air supply duct and the return air duct, so that the hot air is in the air supply duct, The circulating air duct, the return air duct, the heat exchanger, and the hot air blower flow. The hot air constant temperature external circulation control system according to claim 1, wherein the valves are further set to a half-open mode between the inner circulation mode and the outer circulation mode, and in the half-open mode, the valves are not One of the air supply duct, the circulating air duct, and the return air duct is completely closed. The hot air constant temperature external circulation control system according to claim 1 or 2, wherein the hot air blower includes a body that can output the hot air, an air outlet, and an air inlet, the air supply duct is connected to the air outlet, the heat exchanger Connect the air inlet. The hot air constant temperature external circulation control system according to claim 3, wherein The body has a top wall and a peripheral wall, and the air outlet is formed on the top wall, and the air inlet is formed on the peripheral wall. The hot air constant temperature external circulation control system of claim 4, wherein the air supply duct has a first rising section extending upward from the air outlet of the hot air blower, and a horizontal edge of the first rising section is along a level a first horizontal section extending in a forward direction and a first descending section extending downward from a leading edge of the first horizontal section. The hot air constant temperature external circulation control system according to claim 5, wherein the return air duct has a second rising section extending upward from an end of the heat exchanger away from the air inlet, and a second rising section a second horizontal section of the top edge extending forward in the horizontal direction, and a second descending section extending downward from the leading edge of the second horizontal section. The hot air constant temperature external circulation control system of claim 6, wherein the two ends of the circulating air duct are respectively connected to the first horizontal section of the air supply duct and the second horizontal section of the air return duct.