CN210408151U

CN210408151U - Hot-blast stove

Info

Publication number: CN210408151U
Application number: CN201920963470.6U
Authority: CN
Inventors: 庞喜存; 胡钢峰; 张临勋; 李俊杰; 郭西佩
Original assignee: Qingdao Hanshang Electrical Appliance Co ltd
Current assignee: Qingdao Hanshang Electrical Appliance Co ltd
Priority date: 2019-06-25
Filing date: 2019-06-25
Publication date: 2020-04-28
Anticipated expiration: 2029-06-25

Abstract

The utility model provides a hot blast stove improves temperature uniformity in the furnace chamber, and water injection system vaporizes completely, can not the residual water, need not to place flourishing water receptacle alone and realizes the fermentation function. The hot air furnace is characterized in that a hot air circulating device of the hot air furnace is arranged on a back plate of the inner container and comprises an electric heating pipe, a hot air circulating fan and a fan cover, an air channel is formed between the fan cover and the back plate of the inner container, and a heating part of the electric heating pipe and an impeller of the hot air circulating fan are both positioned in the air channel; the hot air circulating fan is provided with one impeller which is a centrifugal impeller, and the motor is an asynchronous motor capable of rotating forward and backward; the heating part of the electric heating pipe is wound on the periphery of the impeller for a plurality of circles; the water outlet end of the water spray pipe is provided with a high-pressure atomizing nozzle; the water inlet end of the spray pipe is connected with the water outlet end of the water inlet pipe, and the body of the water inlet pipe is connected with the water pump. The utility model drives the centrifugal impeller to rotate positively and negatively through the asynchronous motor which can rotate positively and negatively, so that the temperature in the whole cavity is more uniform; and the electric heating pipe is wound for a plurality of circles, so that the heating area is increased, and the sprayed water is completely evaporated without residual accumulated water.

Description

Hot-blast stove

Technical Field

The utility model relates to an improved structure of a hot blast stove (namely, a hot blast oven).

Background

Ovens with hot air, commonly called hot blast stoves, use a double fan circulation in some stoves in order to keep the temperature in the stove as uniform as possible and to shorten the heating time. However, the two hot air circulating fans rotate in one direction, and the rotating directions are the same, so that for hot blast stoves with a large number of shelves in the stove, for example, when more than 5 layers of food need to be baked simultaneously, the temperature in the stove is still uneven, so that the baking color and luster of the food are not uniform, and the taste is affected; in addition, the water spraying system comprises a main water inlet pipe, two water spraying pipes and a three-way piece, wherein one passage of the three-way piece is connected with the water outlet end of the main water inlet pipe, the other two passages of the three-way piece are respectively connected with the water inlet ends of the two water spraying pipes, the water outlet ends of the water spraying pipes face to fan blades of the hot air circulating fan, and the main water inlet pipe is connected with a water pump; the structure of the water spraying system is complicated, the spray head of the water spraying pipe is a simple flat rigid spray head, water flow particles are large, water sprayed onto an impeller of the hot air circulating fan cannot be completely exchanged into steam when a steam function is used, so that residual water at the bottom of the furnace is caused, and the baking effect is poor due to insufficient steam quantity; and when the fermentation function is used, a water container must be separately placed in the furnace to generate the required humidity, which is inconvenient and occupies the space in the box.

Disclosure of Invention

The utility model provides a hot blast stove makes the intracavity temperature more even, and water injection system vaporization is complete, can not lead to the interior bottom residual water of stove, need not to place flourishing water receptacle alone simultaneously and realizes the fermentation function.

In order to solve the technical problem, the utility model adopts the following technical scheme to realize: a hot blast stove comprises a box body, a hot air circulating device and a water spraying system, wherein the box body comprises a box shell and an inner container, the hot air circulating device is arranged on a back plate of the inner container and comprises an electric heating pipe, a hot air circulating fan and a fan cover, the fan cover is positioned on the front side of the back plate of the inner container and forms an air channel with the back plate of the inner container, the fan cover is provided with an air inlet and an air outlet, and a heating part of the electric heating pipe and an impeller of the hot air circulating fan are both positioned in the air channel; the hot air circulating fan is provided with one impeller which is a centrifugal impeller, and a motor for driving the impeller to rotate is an asynchronous motor capable of rotating forward and backward; the heating part of the electric heating pipe is wound on the periphery of the impeller for a plurality of turns; the water spraying system comprises a water inlet pipe, a water spraying pipe and a water pump, wherein a high-pressure atomizing nozzle is arranged at the water outlet end of the water spraying pipe and is positioned in the liner, and the high-pressure atomizing nozzle faces towards the impeller of the hot air circulating fan; the water inlet end of the water spraying pipe extends out of the inner container and is connected with the water outlet end of the water inlet pipe, and the body of the water inlet pipe is connected with the water pump.

The asynchronous motor is a single-phase capacitor running asynchronous motor, the hot air circulating fan is positioned in the center of the back plate of the inner container and aligned to the center of the fan cover, and the radius of the impeller is 1/3-2/5 of the width of the fan cover.

The air inlet is formed in the center of the fan cover, a left side air outlet is formed between the left side edge of the fan cover and the left side plate of the inner container, and a right side air outlet is formed between the right side edge of the fan cover and the right side plate of the inner container.

The air inlet is a plurality of concentric annular holes, and a circle of circular air inlet is arranged on the periphery of the air inlet.

The air outlet is located the top and the below of air intake, just the air intake top the quantity of air outlet is a plurality of, arranges in proper order along the horizontal direction, the air intake below the quantity of air outlet is a plurality of, arranges in proper order along the horizontal direction.

And the heating part of the electric heating pipe is wound on the periphery of an impeller of the hot air circulating fan for a plurality of circles along the axial direction of the impeller.

The spray pipe and the high-pressure atomizing nozzle are both rigid, and the high-pressure atomizing nozzle is connected with the water outlet end of the spray pipe in a welding mode.

And a supporting seat for supporting the water spraying pipe is arranged on the outer surface of the back plate of the inner container.

The water pump is arranged on the bottom plate of the case shell and is positioned at the rear side of the inner container, and the water inlet end of the water pump is led out of the case shell.

Compared with the prior art, the hot air circulating device of the hot air furnace adopts the hot air circulating fan, the asynchronous motor which can rotate forward and backward drives the centrifugal impeller to rotate forward and backward, and a hot air convection circulating system is formed in the furnace chamber, so that the temperature in the whole chamber is more uniform; the heating part of the electric heating pipe is wound on the periphery of the centrifugal impeller for multiple circles, the heating area is increased, the power is increased, meanwhile, the water outlet end of the water spray pipe adopts a high-pressure atomizing nozzle, atomized high-pressure water vapor is sprayed out of the high-pressure atomizing nozzle and sprayed onto the centrifugal impeller rotating at high speed, the particles are small and easy to vaporize completely, the atomized water vapor is thrown to the surface of the electric heating pipe which is heating around by the centrifugal acting force of the centrifugal impeller, high-temperature steam is generated instantaneously, the steam is uniformly dispersed into the space in the furnace chamber through an air duct, and residual water is prevented from being accumulated at the bottom in the furnace due to incomplete evaporation of water; meanwhile, through program setting, the electric heating pipe is heated for a certain time firstly, then the hot air circulating fan works again, and the water pump works to enable the high-pressure atomizing nozzle to spray, so that the temperature and the humidity required by the furnace chamber can be ensured, and the fermentation function can be realized without independently placing a water container.

Drawings

FIG. 1 is a schematic view of the hot air circulating device in the embodiment of the hot air furnace of the present invention;

FIG. 2 is a view taken along line A of FIG. 1;

FIG. 3 is a schematic view of the arrangement structure of the heated air circulation fan, the electric heating pipe and the water spraying pipe on the back plate of the inner container in the embodiment of the hot blast stove of the present invention;

FIG. 4 is a view taken along line A of FIG. 3;

fig. 5 is the schematic view of the assembly structure of the heated air circulation fan, the liner backplate and the water injection system in the embodiment of the hot-blast stove of the present invention.

Detailed Description

The technical solution of the present invention will be described in further detail with reference to the accompanying drawings and the detailed description.

Referring to fig. 1 to 5, the hot blast stove of the present embodiment includes a box body, a hot air circulation device 100 and a water spraying system 200, the box body includes a box shell and an inner container, and since most of the improvements involved in the present embodiment are related to the inner container, the box body, a hot blast stove door body and the like are omitted in the drawings, the structure of the hot blast stove is the same as that of the prior art, and the inner container only shows a rear back plate 300. As shown in fig. 1 and 2, the heated air circulation device 100 is disposed on the backplate 300 of the inner container, and includes an electric heating pipe 110, a heated air circulation fan 120, and a wind shield 130, the wind shield 130 is located on the front side of the backplate 300 of the inner container, and forms an air duct 400 with the backplate 300 of the inner container, the wind shield 130 is provided with an air inlet 131 and an air outlet 132, and the heating portion 111 of the electric heating pipe 110 and the impeller 121 of the heated air circulation fan 120 are both located in the air duct 400; the number of the hot air circulating fans 120 is one, the impeller 121 is a centrifugal impeller, and a motor for driving the impeller 121 to rotate is an asynchronous motor 122 capable of rotating forward and backward; the heat generating portion 111 of the electric heating tube 110 is wound around the impeller 121 for a plurality of turns, as shown in fig. 2; the water spraying system 200 comprises a water inlet pipe 210, a water spraying pipe 220 and a water pump 230, wherein the water outlet end of the water spraying pipe 220 is provided with a high-pressure atomizing nozzle 221, the high-pressure atomizing nozzle 221 is positioned in the liner, and the high-pressure atomizing nozzle 221 faces the impeller 121; the water inlet end of the water spraying pipe 220 extends out of the inner container and is connected with the water outlet end of the water inlet pipe 210, the water pump 230 is connected to the body of the water inlet pipe 210, the water pump 230 is connected with an external water source, and water is pumped by the water pump 230 to spray water to the impeller 121 through the water inlet pipe 210, the water spraying pipe 220 and the high-pressure atomizing nozzle 221.

A hot air circulation fan 120 is adopted, a centrifugal impeller 121 of the hot air circulation fan is driven to rotate forward and backward by an asynchronous motor 122 capable of rotating forward and backward, and a hot air convection circulation system is formed in a furnace chamber, so that the temperature in the whole chamber is more uniform, as shown in fig. 1, an arc-shaped arrow at the periphery of an air inlet 131 is shown, wherein the arc-shaped arrow at the inner ring is the airflow direction when the impeller 121 rotates forward, and the arc-shaped arrow at the outer ring is the airflow direction when the impeller 121 rotates reversely, so that the airflow in the furnace is fully stirred; the heating part 111 of the electric heating tube 110 is wound on the periphery of the centrifugal impeller 121 for multiple circles, the heating area is increased, the power is increased, meanwhile, the water outlet end of the water spray tube 220 adopts the high-pressure atomizing nozzle 221, atomized high-pressure water vapor is sprayed on the centrifugal impeller 121 rotating at high speed through the high-pressure atomizing nozzle 221, the atomized high-pressure water vapor has small particles and is easy to completely vaporize, the atomized water vapor is thrown to the surface of the electric heating tube 110 which is heating at the periphery by the centrifugal impeller 121, high-temperature steam is instantly generated, the steam is uniformly dispersed to the space in the furnace chamber through the air duct 400, and the residual water is prevented from being accumulated at the bottom in the furnace due to incomplete evaporation of water; meanwhile, through program setting, the electric heating pipe 110 is heated for a certain time, then the hot air circulating fan 120 works again, and the water pump 230 works to spray the high-pressure atomizing nozzle, so that the temperature and the humidity required by the furnace chamber can be ensured, and the fermentation function can be realized without independently placing a water container. The water spraying system 200 adopts the water pump 230 to pump water, so that a water source of water pressure does not need to be connected, the water spraying system can be directly connected with water in a barrel or a water pool, the use is flexible and convenient, and the position limitation is small.

Furthermore, the asynchronous motor 122 can meet the use requirement by adopting the simplest and most practical single-phase capacitor to operate the asynchronous motor, and the cost is low; the heated air circulation fan 120 is located at the center of the backplate 300 of the inner container and aligned with the center of the fan housing 130, and the radius of the impeller 121 is 1/3-2/5 of the width W of the fan housing 130. That is, the radius of the impeller 121 is large and as large as possible, so as to increase the air volume, improve the air circulation effect and further improve the uniformity of the temperature and humidity in the furnace.

Because the heated air circulation fan 12 is aligned with the center of the fan housing 130, preferably, the air inlet 131 is opened at the center of the fan housing 130, a left side air outlet 500 is formed between the left side edge of the fan housing 130 and the left side plate of the inner container, a right side air outlet 600 is formed between the right side edge of the fan housing 130 and the right side plate of the inner container, both the left side air outlet 500 and the right side air outlet 600 are communicated with the air duct 400, and air can be exhausted from both sides of the fan housing 130, as shown by air outlet flow arrows at both sides of the fan housing 130 in fig. 1, so that the air flow is more uniform, and the temperature in the whole. The left and right sides of the wind shield 130 are bent toward the front side so as to form a gap with the left and right side plates of the inner container, and the left and right

side air outlets

500 and 600 are correspondingly formed.

Because the impeller 121 is a centrifugal impeller, the length direction of the blades of the centrifugal impeller is parallel to the axial direction of the impeller, and the impeller is cylindrical, the air inlet 131 is preferably a plurality of annular holes concentrically arranged, which are matched with the cylindrical profile of the impeller, so as to reduce the air inlet resistance, and meanwhile, a circle of circular air inlet is arranged on the periphery of the air inlet 131, so as to increase the air inlet area.

Further, the air outlets 132 are disposed above and below the air inlet 131, the number of the air outlets 132 above the air inlet 131 is plural, the air outlets are horizontally long and are sequentially arranged along the horizontal direction, and the number of the air outlets 132 below the air inlet 131 is plural, the air outlets are horizontally long and are sequentially arranged along the horizontal direction. Of course, the air outlet 132 may have other shapes, and is not limited herein.

Since the length direction of the centrifugal impeller 121 is parallel to the axial direction of the impeller 121, the heat generating portion 111 of the electric heating tube 110 is wound around the periphery of the impeller 121 of the heated-air circulation fan 120 in multiple turns in the axial direction of the impeller 121, as shown in fig. 4 and 5, rather than in the radial direction, which is advantageous for making the distances between the heat generating portions 111 of the respective turns and the impeller 121 consistent and stronger, so that the heat generating portions 111 of the electric heating tube 110 can all contact the mist thrown off by the impeller 121, thereby improving the heating and evaporating efficiency.

The spray pipe 220 and the high pressure atomizing nozzle 221 are rigid, and the high pressure atomizing nozzle 221 is welded to the water outlet end of the spray pipe 220. The rigid (e.g., metal) nozzle head 220 and the high pressure atomizing nozzle 221 are not easily deformed and are adapted to the high temperature environment in the furnace so as to be stably oriented toward the impeller 121. The water inlet pipe 210 is arranged outside the inner container, and can be a flexible pipe, so that the water inlet pipe is convenient to bend and place, and space is saved. The water pump 230 is preferably an electromagnetic pump so as to be in communication connection with a controller of the hot blast stove, the intelligent control is performed on the electromagnetic pump, and the electromagnetic pump is small and easy to install.

In order to further improve the stability of the sprinkler pipe 220, a support seat 700 for supporting the sprinkler pipe 220 is provided on the outer surface of the backplate 300 of the inner container, and as shown in fig. 4 and 5, the sprinkler pipe 420 may be fixed to the support seat 700 by using a strap or a clip.

Further, the water pump 230 may be installed on a bottom plate of the cabinet (not shown in the drawings) and located at the rear side of the inner container, specifically, on the outer surface of the bottom plate of the cabinet, since casters are generally installed at four corners of the outer surface, the four corners of the outer surface form a supporting space, and the water pump 230 is located in the supporting space, the supporting space can be fully utilized, so as to additionally increase the occupied space of the cabinet 100. Meanwhile, the water inlet end of the water pump 230 is led out of the case shell so as to be convenient for connecting a water source.

The above embodiments are only used to illustrate the technical solution of the present invention, and not to limit it; although the present invention has been described in detail with reference to the foregoing embodiments, it will be apparent to those skilled in the art that modifications may be made to the embodiments described in the foregoing embodiments, or that equivalents may be substituted for elements thereof; such modifications and substitutions do not depart from the spirit and scope of the present invention, which is claimed.

Claims

1. A hot blast stove comprises a box body, a hot air circulating device and a water spraying system, wherein the box body comprises a box shell and an inner container, the hot air circulating device is arranged on a back plate of the inner container and comprises an electric heating pipe, a hot air circulating fan and a fan cover, the fan cover is positioned on the front side of the back plate of the inner container and forms an air channel with the back plate of the inner container, the fan cover is provided with an air inlet and an air outlet, and a heating part of the electric heating pipe and an impeller of the hot air circulating fan are both positioned in the air channel; the method is characterized in that: the hot air circulating fan is provided with one impeller which is a centrifugal impeller, and a motor for driving the impeller to rotate is an asynchronous motor capable of rotating forward and backward; the heating part of the electric heating pipe is wound on the periphery of the impeller for a plurality of turns; the water spraying system comprises a water inlet pipe, a water spraying pipe and a water pump, wherein a high-pressure atomizing nozzle is arranged at the water outlet end of the water spraying pipe and is positioned in the liner, and the high-pressure atomizing nozzle faces towards the impeller of the hot air circulating fan; the water inlet end of the water spraying pipe extends out of the inner container and is connected with the water outlet end of the water inlet pipe, and the body of the water inlet pipe is connected with the water pump.

2. The hot blast stove according to claim 1, characterized in that: the asynchronous motor is a single-phase capacitor running asynchronous motor, the hot air circulating fan is positioned in the center of the back plate of the inner container and aligned to the center of the fan cover, and the radius of the impeller is 1/3-2/5 of the width of the fan cover.

3. The stove according to claim 2, characterized in that: the air inlet is formed in the center of the fan cover, a left side air outlet is formed between the left side edge of the fan cover and the left side plate of the inner container, and a right side air outlet is formed between the right side edge of the fan cover and the right side plate of the inner container.

4. The stove according to claim 3, characterized in that: the air inlet is a plurality of concentric annular holes, and a circle of circular air inlet is arranged on the periphery of the air inlet.

5. The stove according to claim 4, characterized in that: the air outlet is located the top and the below of air intake, just the air intake top the quantity of air outlet is a plurality of, arranges in proper order along the horizontal direction, the air intake below the quantity of air outlet is a plurality of, arranges in proper order along the horizontal direction.

6. The hot blast stove according to claim 1, characterized in that: and the heating part of the electric heating pipe is wound on the periphery of an impeller of the hot air circulating fan for a plurality of circles along the axial direction of the impeller.

7. The hot blast stove according to claim 1, characterized in that: the spray pipe and the high-pressure atomizing nozzle are both rigid, and the high-pressure atomizing nozzle is connected with the water outlet end of the spray pipe in a welding mode.

8. The hot blast stove according to claim 1, characterized in that: and a supporting seat for supporting the water spraying pipe is arranged on the outer surface of the back plate of the inner container.

9. The hot blast stove according to claim 1, characterized in that: the water pump is arranged on the bottom plate of the case shell and is positioned at the rear side of the inner container, and the water inlet end of the water pump is led out of the case shell.