CN212335046U

CN212335046U - Fermentation treatment equipment for various animal carcasses

Info

Publication number: CN212335046U
Application number: CN202021320074.0U
Authority: CN
Inventors: 黄永林
Original assignee: Individual
Current assignee: Individual
Priority date: 2019-08-01
Filing date: 2020-07-08
Publication date: 2021-01-12
Anticipated expiration: 2030-07-08
Also published as: TWM620067U; JP3228700U

Abstract

The utility model discloses a fermentation treatment device for various animal carcasses, which comprises a centralized treatment bin, a plurality of fermentation tanks arranged in the centralized treatment bin, and at least one waste gas treatment device connected with the plurality of fermentation tanks, wherein the fermentation tanks comprise a tank body base, a tank body arranged on the tank body base, and a rotation driving mechanism for driving the tank body to rotate, and a plurality of groups of heating components and a plurality of groups of gas supply components are respectively distributed on the inner wall of the tank body; an exhaust port connected to an exhaust gas treatment device is provided at the rear end of the tank body. The utility model provides a fermentation treatment equipment for various animal carcasses, which integrates a plurality of fermentation tanks, can simultaneously carry out independent fermentation treatment on a plurality of carcasses, obtains independent organic fertilizer, provides convenience for people to treat the animal carcasses, and reduces the cost; meanwhile, the method is beneficial to centralized management of a plurality of fermentation tanks, the decomposition and decomposition of animal carcasses are completely and thoroughly realized, the efficiency is high, the purposes of energy saving and carbon reduction are achieved, and energy regeneration is realized.

Description

Fermentation treatment equipment for various animal carcasses

Technical Field

The utility model relates to an all kinds of spoil fermentation field especially relates to an all kinds of spoil fermentation treatment equipment.

Background

Dead bodies of animals often carry various germs, and if the dead bodies are not treated or are not treated properly, the dead bodies can be decomposed and rotten quickly and emit odor, so that pathogenic microorganisms pollute air, water sources and soil, the living environment of people is affected, and even the spread and spread of diseases are caused.

The most traditional methods of disposing of animal carcasses are direct landfilling or cremation. After the animal carcasses are buried, the problems of decomposition and putrefaction, odor emission, air pollution, water source pollution, soil pollution and the like of pathogenic microorganisms are inevitably caused. The direct generation of the cremation is the consumption of fuel oil, which generates a large amount of carbon emission and is not beneficial to the environmental protection.

Therefore, the method for treating animal carcasses by adopting a high-temperature biodegradation method to finally prepare organic fertilizers is already available in the market at present, however, the method is very energy-consuming and contradictory to the environmental protection concept, and cannot realize centralized management.

SUMMERY OF THE UTILITY MODEL

In view of the above disadvantages, an object of the present invention is to provide a fermentation treatment device for various animal carcasses, which integrates a plurality of fermentation tanks, and can simultaneously perform separate fermentation treatment on a plurality of carcasses to obtain separate organic fertilizer, thereby providing convenience for people to treat animal carcasses and reducing cost; meanwhile, the method is beneficial to centralized management of a plurality of fermentation tanks, the decomposition and decomposition of animal carcasses are completely and thoroughly realized, the efficiency is high, the purposes of energy saving and carbon reduction are achieved, and energy regeneration is realized.

The utility model discloses a reach the technical scheme that above-mentioned purpose adopted and be:

the fermentation treatment equipment for various animal carcasses is characterized by comprising a centralized treatment bin, a plurality of fermentation tanks arranged in the centralized treatment bin, and at least one waste gas treatment device connected with the fermentation tanks, wherein each fermentation tank comprises a tank body base, a tank body arranged on the tank body base, and a rotation driving mechanism for driving the tank body to rotate, and a plurality of groups of heating assemblies and a plurality of groups of gas supply assemblies are respectively distributed on the inner wall of the tank body; an exhaust port connected to an exhaust gas treatment device is provided at the rear end of the tank body.

As a further improvement, the heating assembly includes a heating structure distributed on the inner wall of the tank body along the length direction of the tank body, and at least one heating element distributed inside the heating structure along the length direction of the heating structure, wherein the heating element is connected to an external power supply device through a power supply wire.

As a further improvement, the air supply assembly comprises an air pipe disposed on the inner wall of the tank and distributed side by side with the heating structure, a plurality of air holes are formed on the side wall of the air pipe, and an air pipe connected between the air pipe and the external air supply device is disposed at the front end of the tank.

As a further improvement, a plurality of strip-shaped grooves for embedding the heating component and the air supply component are formed on the inner wall of the tank body.

As a further improvement, the inner wall of the tank body is provided with a heat preservation layer.

As a further improvement of the utility model, the heating element comprises a printed copper foil attached to the inner wall of the tank body, and the printed copper foil is connected to an external power supply device through an electrified wire.

As a further improvement of the utility model, the upper convex of the inner wall of the tank body is provided with a plurality of conical breaking bulges.

As a further improvement, the rotation driving mechanism comprises a motor arranged on the base of the tank body, a transmission shaft connected to the output shaft of the motor, and an at least transmission roller which is sleeved on the periphery of the transmission shaft and contacts with the outer wall of the tank body.

As a further improvement of the present invention, an exhaust structure is disposed at an end of the inner side of the tank body close to the exhaust port, the exhaust structure includes a baffle plate disposed in the tank body and a partition plate disposed in the tank body and located between the baffle plate and the exhaust port, an exhaust cavity is formed between the baffle plate and the exhaust port, an inner exhaust port is disposed on the baffle plate, an upper exhaust via hole and a lower exhaust via hole are formed between the baffle plate and the inner wall of the tank body, an upper exhaust channel communicated between the inner exhaust port and the upper exhaust via hole and a lower exhaust channel communicated between the inner exhaust port and the lower exhaust via hole are respectively formed between the baffle plate and the baffle plate; meanwhile, an upper movable baffle sheet swinging in the upper exhaust channel and a lower movable baffle sheet swinging in the lower exhaust channel are respectively arranged on the inner exhaust port.

As a further improvement, the tank body is mainly composed of a lower tank body and an upper cover covering the lower tank body, the upper end of the lower tank body is provided with an open inlet, the upper cover is covered on the open inlet, and simultaneously, a plurality of lifting hooks are arranged on the upper cover.

As a further improvement of the present invention, the waste gas treatment device comprises a waste gas treatment tank, a plurality of waste gas ventilation pipelines connected between the front end of the waste gas treatment tank and the plurality of fermentation tanks, and a negative pressure exhaust fan arranged at the rear end of the waste gas treatment tank, wherein an active bacteria bed is arranged at the front side inside the waste gas treatment tank, and the rear side is filled with active carbon; an electric heating component is arranged in the exhaust gas ventilating pipeline; the centralized processing bin is provided with a solar photovoltaic panel electrically connected to the negative pressure exhaust fan.

The utility model has the advantages that:

(1) the centralized treatment bin capable of accommodating the plurality of fermentation tanks is designed, the plurality of fermentation tanks are three-dimensionally integrated, the occupied area of the fermentation tanks is reduced, a plurality of carcasses can be simultaneously subjected to independent fermentation treatment, and independent organic fertilizers are obtained, so that when people encounter the carcasses, equipment can be used for treatment, great convenience is provided for people to treat various carcasses, and the cost is reduced; moreover, the centralized management of a plurality of fermentation tanks is facilitated;

(2) by the special structural design of a plurality of groups of heating components and a plurality of groups of gas supply components in the fermentation tank, proper temperature and oxygen are provided for the fermentation process in the tank body, so that the decomposition and the decomposition of the internal animal carcasses are facilitated to be more complete, and finally an organic fertilizer is formed, thereby achieving the purposes of saving energy and reducing carbon and realizing energy regeneration;

(3) the waste gas generated after the fermentation treatment of the plurality of fermentation tanks is treated in a centralized way by a waste gas treatment device, and toxic components, taste and the like in the waste gas are adsorbed by an active bacteria bed to complete the primary treatment process of the waste gas; and then, adsorbing the residual pollutants in the waste gas by using the activated carbon, separating the pollutants from the gas to obtain colorless, tasteless and clean gas, and finally discharging the gas into the environment, wherein the waste gas is thoroughly and completely treated and is harmless to the environment and human bodies.

(4) The whole equipment has low current energy consumption, and can adopt a solar power supply mode to achieve the purposes of energy conservation and environmental protection.

The above is an overview of the technical solution of the present invention, and the present invention is further explained with reference to the accompanying drawings and the detailed description.

Drawings

Fig. 1 is a schematic view of the overall structure of the present invention;

FIG. 2 is a schematic view of the external structure of the fermentation tank of the present invention;

FIG. 3 is a schematic view of the internal structure of the fermentation tank of the present invention;

FIG. 4 is a cross-sectional view of the heating module and the gas supply module of the present invention;

FIG. 5 is a cross-sectional view of a fermenter according to the present invention;

FIG. 6 is an enlarged view of portion A of FIG. 5;

FIG. 7 is a schematic structural view of the cone-shaped breaking protrusion in the tank of the present invention;

fig. 8 is a schematic structural view of the exhaust structure of the present invention;

fig. 9 is a schematic structural view of the open state of the upper cover of the tank body.

Detailed Description

To further illustrate the technical means and effects of the present invention adopted to achieve the intended purpose, the following detailed description of the embodiments of the present invention is provided in conjunction with the accompanying drawings and preferred embodiments.

Please refer to fig. 1 to 3, an embodiment of the present invention provides a fermentation treatment device for various animal carcasses, including a centralized processing bin 1, several fermentation tanks 2 disposed in the centralized processing bin 1, and at least one exhaust treatment device 3 connected to the several fermentation tanks 2, wherein the fermentation tank 2 includes a tank base 21, a tank 22 disposed on the tank base 21, and a rotation driving mechanism 23 for driving the tank 22 to rotate, a plurality of sets of heating assemblies 24 and a plurality of sets of air supply assemblies 25 are respectively disposed on the inner wall of the tank 22, the fermentation process is heated in the tank 22 by the plurality of sets of heating assemblies 24, the fermentation process provides oxygen for the tank 22 by the plurality of sets of air supply assemblies 25, which is beneficial to complete decomposition and decomposition of the internal animal carcasses.

Meanwhile, an exhaust port 221 communicated with the exhaust gas treatment device 3 is arranged at the rear end part of the tank body 22, and after fermentation is completed, the generated exhaust gas is discharged from the exhaust port 221, and finally the exhaust gas is purified by the exhaust gas treatment device and finally discharged to the external environment.

In this embodiment, have the several position in a storehouse that supplies fermentation cylinder 2 to put into in centralized processing storehouse 1, put into the position in a storehouse with fermentation cylinder 2 after, realize gathering several fermentation cylinder 2 in an organic whole, can carry out fermentation treatment alone to many corpses simultaneously, acquire solitary fertilizer to people can have equipment to handle when meetting the spoil, provide very big facility for people handle the spoil, reduce the cost moreover.

Specifically, as shown in fig. 3 and 4, the heating element 24 includes a heating structure 241 distributed on the inner wall of the tank 22 along the length direction of the tank 22, and at least one heating element 242 distributed inside the heating structure 241 along the length direction of the heating structure 241, wherein the heating element 242 is directly connected to an external power supply device through a power supply wire. Specifically, the heating structure 241 may be a heating tube, and the heating element 242 may be a heating wire. The inside of the can 22 is uniformly heated by the heat generated by the heating element 242, thereby increasing the temperature inside the can 22.

For the structure of the heating element 24, it may further include a printed copper foil attached to the inner wall of the can 22, and the printed copper foil is connected to an external power supply device through a power-on wire. The printed copper foil is electrically heated to uniformly heat the inside of the can body 22, thereby increasing the temperature inside the can body 22.

Meanwhile, the air supply assembly 25 includes an air tube 251 disposed on the inner wall of the tank 22 and distributed side by side with the heat generating structure 241, and a plurality of air holes 2511 are formed on the side wall of the air tube 251, as shown in fig. 4; the front end of the tank 22 is provided with a connecting device for the electrical structure and oxygen to enter the tank 22. At the front end of the tank 22, a ventilation pipe 252 connected between the air pipe 251 and an external air supply device is provided, and the ventilation pipe 252 is extended outside through a coupling device. Air (oxygen) is introduced into the air pipe 251 from an external air supply device through the air pipe 252, and the air is sprayed into the tank body 22 from the plurality of air holes 2511 on the side wall of the air pipe 251, so that the benefit of preheating and accelerating the biodegradation reaction is achieved, and the decomposition of the internal zymophyte on the animal carcass is facilitated.

When the heating element 24 and the air supply element 25 are specifically installed, in this embodiment, a plurality of strip-shaped grooves 222 for the heating element 24 and the air supply element 25 to be embedded are formed on the inner wall of the tank 22, as shown in fig. 5 and 6, and meanwhile, an insulating layer 223 is disposed on the inner wall of the tank 22, which is beneficial to preventing heat inside the tank 22 from dissipating.

In order to accelerate the decomposition speed of the animal carcass, in this embodiment, a plurality of conical breaking protrusions 224 are convexly arranged on the inner wall of the tank 22, as shown in fig. 7, during the rotation of the tank 22, the plurality of conical breaking protrusions 224 collide and break the animal carcass and the filler, thereby accelerating the decomposition speed.

In this embodiment, as shown in fig. 2, the rotation driving mechanism 23 includes a motor 231 disposed on the base of the tank 22, a transmission shaft 232 connected to an output shaft of the motor 231, and at least one transmission roller 233 sleeved on the periphery of the transmission shaft 232 and contacting with the outer wall of the tank 22. The motor 231 drives the transmission shaft 232 to rotate, the transmission shaft 232 rotates to drive the transmission roller 233 to rotate, and the rotation of the transmission roller 233 causes the can body 22 to rotate. By controlling the rotating speed of the fermentation tank, for example, the fermentation tank rotates 2 to 3 circles a day, the power consumption is low, and the energy is saved and the environment is protected; and because the fermentation tank rotates, the carcasses, the zymophytes and the filler in the fermentation tank can be continuously turned over, internal oxygen supplementation is realized, the whole aerobic fermentation applying process is accelerated, the fermentation efficiency is improved, and the turnover rate of each fermentation tank is improved.

In the present embodiment, as shown in fig. 8, an exhaust structure 225 is disposed at an end of the inner side of the tank 22 close to the exhaust port 221, and specifically, the exhaust structure 225 includes a baffle 2251 disposed in the tank 22, and a partition 2252 disposed in the tank 22 and between the baffle 2251 and the exhaust port 221, an exhaust chamber 2253 is formed between the partition 2252 and the exhaust port 221, an inner exhaust port 22511 is formed on the baffle 2251, an upper exhaust through hole 2254 and a lower exhaust through hole 2255 are formed between the partition 2252 and the inner wall of the tank 22, an upper exhaust channel 2256 communicating between the inner exhaust port 22511 and the upper exhaust through hole 2254, and a lower exhaust channel 2257 communicating between the inner exhaust port 11 and the lower exhaust through hole 2255 are respectively formed between the baffle 2251 and the partition 2252. Meanwhile, an upper movable stopper 2258 which swings in the upper exhaust passage 2256 and a lower movable stopper 2259 which swings in the lower exhaust passage 2257 are provided in the inner exhaust port 22511, respectively.

In this embodiment, the upper movable blocking piece 2258 and the lower movable blocking piece 2259 are freely swingable movable blocking pieces, that is, when the tank 11 is rotated until the upper movable blocking piece 2258 is located above the lower movable blocking piece 2259, the upper movable blocking piece 2258 swings downward to communicate the inner exhaust port 22511 with the upper exhaust passage 2256, that is, the upper movable blocking piece 2258 is in an open state, and exhaust gas can pass through; the lower flap 2259 abuts against the partition 2252, i.e. the lower flap 2259 is in a closed state, so that the inner exhaust port 22511 cannot communicate with the lower exhaust channel 2257, and exhaust gas cannot pass through. When the tank 11 continues to rotate until the upper movable blocking piece 2258 is located below the lower movable blocking piece 2259, in the same way, the lower movable blocking piece 2259 swings down to connect the inner exhaust port 22511 with the lower exhaust channel 2257, i.e. the lower movable blocking piece 2259 is in an open state and exhaust gas can pass through; the upper movable stopper 2258 is just abutted against the partition 2252, i.e., the upper movable stopper 2258 is in a closed state, so that the inner exhaust port 22511 cannot communicate with the upper movable stopper 2258, and exhaust gas cannot pass through. Therefore, the exhaust gas is always kept to be discharged from the upper exhaust channel in the tank body, and the lower exhaust channel is blocked, so that the internal substances are prevented from entering and even blocking the lower exhaust channel.

When the waste gas generated by fermentation enters the upper side exhaust channel, the waste gas enters the exhaust cavity 2253 through the upper side exhaust through hole and is finally discharged to the waste gas treatment device 3 through the exhaust port 221.

In the present embodiment, as shown in fig. 1, the waste gas treatment device 3 comprises a waste gas treatment tank 31, a plurality of waste gas ventilation pipelines 32 connected between the front end of the waste gas treatment tank 31 and the plurality of fermentation tanks 2, and a negative pressure exhaust fan 33 disposed at the rear end of the waste gas treatment tank 31, wherein an active bacterial bed is disposed at the front side of the interior of the waste gas treatment tank 31, and activated carbon is filled at the rear side. Specifically, the active bacteria bed is mainly formed by vertically laminating a plurality of microorganism beds, and a biomembrane is arranged in the microorganism beds, and specifically, the biomembrane comprises a plastic carrier, and wood chips and microorganism active bacteria filled in the plastic carrier.

The waste gas entering the waste gas treatment device 3 enters the waste gas treatment tank 31 through the waste gas ventilating pipeline 32, and then toxic components, taste and the like in the waste gas are adsorbed by a biological membrane in an active bacteria bed in the waste gas treatment tank 31, so that the primary treatment process of the waste gas is completed. Then, the waste gas after primary treatment passes through the activated carbon, and pollutants in the waste gas are adsorbed on the surface of the activated carbon, so that the pollutants are separated from the gas, and colorless, tasteless and clean gas is obtained; finally, the waste gas is introduced into the environment by the negative pressure exhaust fan 33, and the waste gas is thoroughly and completely treated and is harmless to the environment and human bodies.

In order to prevent the steam condensation phenomenon from occurring inside the exhaust gas ventilation pipe 32, the electric heating assembly 321 is provided in the exhaust gas ventilation pipe 32 in the embodiment, specifically, the electric heating assembly 321 may be a heating wire, and is powered on by the electric heating assembly 321 to generate heat, so as to properly heat the inside of the exhaust gas ventilation pipe 32, increase the internal temperature, and achieve the purpose of effectively preventing the steam condensation and condensation phenomenon from occurring.

In order to achieve the purpose of energy saving, the solar photovoltaic panel 4 for respectively supplying power to the heating assembly 24, the electric heating assembly 321 and the negative pressure exhaust fan 33 is arranged on the centralized processing bin 1, and the solar photovoltaic panel 4 absorbs the solar photovoltaic heat and converts the solar photovoltaic heat into electric energy to supply power to the whole equipment system.

In order to facilitate the placement of the animal carcass, the stuffing and the fermentation tubes into the tank 22, as shown in fig. 9, the tank 22 of this embodiment mainly comprises a lower tank 226 and an upper cover 227 covering the lower tank 226, the upper end of the lower tank 226 has an open input port 2261, the upper cover 227 covers the open input port 2261, and the animal carcass, the stuffing and the fermentation tubes are placed into the tank from the open input port 2261; meanwhile, a plurality of lifting hooks 2271 are arranged on the upper cover 227, so that the whole fermentation tank 2 can be lifted automatically.

In order to ensure the sealing performance of the can 22 after the upper cover 227 is covered on the lower can 226, in this embodiment, a sealing ring is disposed on the edge of the upper end surface of the lower can 226, so that the upper cover 227 is tightly combined with the lower can 226, and the upper cover 227 is fixed on the lower can 226 by screws or the like.

Of course, the present embodiment may also be provided with a temperature sensor in the tank 22, so as to facilitate real-time detection and understanding of the temperature in the tank 22, and facilitate control of the internal heating temperature, for example, to maintain the internal temperature of the tank at 60 ℃ to 70 ℃.

Meanwhile, a thermometer 5, a hygrometer 6 and a time recorder 7 can be arranged at the front end of the tank body 22 of the fermentation tank 2, and the thermometer 5 and the hygrometer 6 are inserted into the tank body 22, as shown in fig. 9, so that a worker can view the temperature, the humidity and the fermentation time inside the tank body 22 in real time.

Meanwhile, a controller can be added to carry out automatic centralized control on the operation of the plurality of fermentation tanks 2, specifically, the rotation speed and the internal heating temperature of the fermentation tanks 2 and the control of introducing air (oxygen) into the tank body 22 are controlled, so that the automatic management of the whole equipment is facilitated.

The above description is only a preferred embodiment of the present invention, and is not intended to limit the technical scope of the present invention, so that other structures obtained by adopting the same or similar technical features as the above embodiments of the present invention are all within the protection scope of the present invention.

Claims

1. The fermentation treatment equipment for various animal carcasses is characterized by comprising a centralized treatment bin, a plurality of fermentation tanks arranged in the centralized treatment bin, and at least one waste gas treatment device connected with the fermentation tanks, wherein each fermentation tank comprises a tank body base, a tank body arranged on the tank body base, and a rotation driving mechanism for driving the tank body to rotate, and a plurality of groups of heating assemblies and a plurality of groups of gas supply assemblies are respectively distributed on the inner wall of the tank body; an exhaust port connected to an exhaust gas treatment device is provided at the rear end of the tank body.

2. The fermentation treatment equipment for various animal carcasses according to claim 1, wherein the heating assembly comprises a heating structure distributed on the inner wall of the tank body along the length direction of the tank body and at least one heating element distributed inside the heating structure along the length direction of the heating structure, wherein the heating element is connected to an external power supply device through a power supply lead.

3. The fermentation treatment equipment for various animal carcasses according to claim 2, wherein the air supply unit comprises an air tube disposed on the inner wall of the tank body and arranged in parallel with the heat generating structure, a plurality of air holes are formed on the side wall of the air tube, and a ventilation tube connected between the air tube and an external air supply device is disposed at the front end of the tank body.

4. The fermentation treatment equipment for various animal carcasses according to claim 3, wherein a plurality of strip-shaped grooves for embedding the heating component and the air supply component are formed on the inner wall of the tank body.

5. The fermentation treatment equipment for various animal carcasses according to claim 3, wherein an insulating layer is arranged on the inner wall of the tank body.

6. The fermentation treatment equipment for various animal carcasses according to claim 1, wherein the heating component comprises a printed copper foil attached to the inner wall of the tank body, and the printed copper foil is connected to an external power supply device through an electrified lead.

7. The fermentation treatment equipment for various animal carcasses according to claim 1, wherein a plurality of conical breaking bulges are convexly arranged on the inner wall of the tank body.

8. The fermentation treatment equipment for various animal carcasses according to claim 1, wherein the rotation driving mechanism comprises a motor arranged on a base of the tank body, a transmission shaft connected with an output shaft of the motor, and at least one transmission roller sleeved on the periphery of the transmission shaft and contacted with the outer wall of the tank body.

9. The fermentation treatment equipment for various animal carcasses according to claim 1, wherein an exhaust structure is arranged at one end of the inner side of the tank body close to the exhaust port, the exhaust structure comprises a baffle plate arranged in the tank body and a partition plate arranged in the tank body and positioned between the baffle plate and the exhaust port, an exhaust cavity is formed between the partition plate and the exhaust port, an inner exhaust port is formed on the baffle plate, an upper exhaust through hole and a lower exhaust through hole are formed between the partition plate and the inner wall of the tank body, an upper exhaust channel communicated between the inner exhaust port and the upper exhaust through hole and a lower exhaust channel communicated between the inner exhaust port and the lower exhaust through hole are respectively formed between the baffle plate and the partition plate; meanwhile, an upper movable baffle sheet swinging in the upper exhaust channel and a lower movable baffle sheet swinging in the lower exhaust channel are respectively arranged on the inner exhaust port.

10. The fermentation treatment equipment for various animal carcasses according to claim 1, wherein the tank body mainly comprises a lower tank body and an upper cover covering the lower tank body, an open inlet is arranged at the upper end of the lower tank body, the upper cover covers the open inlet, and a plurality of lifting hooks are arranged on the upper cover.

11. The fermentation treatment equipment for various animal carcasses according to claim 1, wherein the waste gas treatment device comprises a waste gas treatment tank, a plurality of waste gas vent pipes connected between the front end of the waste gas treatment tank and a plurality of fermentation tanks, and a negative pressure exhaust fan arranged at the rear end of the waste gas treatment tank, wherein an active bacteria bed is arranged at the front side in the waste gas treatment tank, and the rear side is filled with active carbon; an electric heating component is arranged in the exhaust gas ventilating pipeline; the centralized processing bin is provided with a solar photovoltaic panel electrically connected to the negative pressure exhaust fan.