JP2021186152A - Negative pressure air-conditioning system capable of taking infection countermeasures using internal combustion engine - Google Patents

Abstract

To provide an infection countermeasure air-conditioning system which generates and maintains negative pressure in a vehicle or in a room.SOLUTION: An air-conditioning system generates and maintains negative pressure in a vehicle or in a room by using vacuum with the suction air by introducing the air including pathogens generated in an infectious patient transportation vehicle, infection countermeasure sickroom, temporary sickroom, biohazard laboratory or hospital ship into an air suction system of an engine of a vehicle or power generator or a power engine of a ship. As a result, the power consumption for suctioning the air is eliminated and the operable time of an emergency power source can be extended. Also, by breaking, incinerating and deactivating the pathogens included in the air with the heat and pressure in the combustion process of the internal combustion engine, the exhaust air can be detoxified without using a HEPA filter. As a result, not only the cost for exchanging and discarding the filter can be reduced but also the incompetence of a medical function due to the temporary unavailability following the replacement work of the filter and the stagnation in production, supply and discarding processing of the filter in the case of emergency can be avoided.SELECTED DRAWING: Figure 1

Description

The present invention is a negative pressure air conditioning system that can take measures against infectious diseases using an internal combustion engine.

Infectious disease control hospital rooms, infectious disease patient transport vehicles, biohazard experimental facilities, etc., in order to prevent the spread of pathogens such as bacteria, fungi, and viruses, the air pressure inside or inside the vehicle is negative pressure (pressure lower than the outside air pressure). To maintain. In order to maintain this negative pressure, the air inside the room or the vehicle is sucked and discharged to the outside through an air filter (Patent Document 1). Air filters are stipulated by national standards for their collection efficiency, pressure loss, and other performance so as to prevent the outflow of pathogens while ensuring a sufficient flow rate to maintain negative pressure. For example, in Japan, the guidelines of the Ministry of Health, Labor and Welfare stipulate that a HEPA filter (JIS Z 8122) should be used (Non-Patent Document 1).

However, in the method of removing pathogens using a filter, the air permeability is reduced due to clogging of the filter, so it is necessary to replace the filter regularly. During the replacement work, the hospital room, vehicle, and facility cannot be used. On the other hand, in the case of a large-scale infectious disease such as SARS or the new coronavirus, it is desirable to avoid a decrease in the operating rate of the hospital room and the vehicle. In addition, in the event of a large-scale infectious disease, there are concerns about supply stagnation due to a rapid increase in demand and a shortage of raw materials. In addition, used filters are classified as infectious disease waste, and not only are they expensive to dispose of, but they may not be able to keep up with social dysfunction due to disasters, wars, terrorism, etc. Furthermore, since electricity is consumed to suck air through the filter, a large amount of fuel for an emergency power source is consumed in the event of a power failure. That is, in the current pathogen removal method, 1-the effect is reduced due to clogging of the filter, 2-the temporary suspension of use occurs due to the replacement of the filter, 3-the running cost is incurred due to the replacement of the filter, and 4-the filter in case of an emergency. It has the disadvantages of stagnant production, supply and disposal, and consumption of 5-power, which shortens the operating time of the emergency power supply.

On the other hand, microorganisms such as bacteria, fungi, and viruses that are pathogens are basically composed of organic substances except for water, and therefore can be detoxified by incineration due to their chemical properties. For example, in the disinfection of metal laboratory equipment and medical equipment, a method of incinerating and removing microorganisms that cause pathogens by heating with an alcohol lamp or the like may be adopted. However, this incinerator method requires a flame of several hundred degrees Celsius or higher or a high temperature, and it is difficult to apply it to an air conditioning system due to safety and energy efficiency problems.

Japanese Unexamined Patent Publication No. 2003-024396

"Hospital Equipment Design Guidelines (Air Conditioning Equipment) -Hospital Air Conditioning Equipment Design and Management Guidelines", Japan Medical Welfare Equipment Association, 2013

The current negative pressure air conditioning system for infectious disease control adopts a method of collecting and removing pathogens with a HEPA filter, but 1-filter replacement and processing are required, and production, supply, in case of emergency, There is a problem that the disposal process may not catch up, and 2-the operation time of the emergency power supply is shortened because electricity is consumed for sucking air. The present invention provides an air conditioning system capable of generating negative pressure without using consumable parts such as filters, generating infectious disease waste, and using electricity.

The present invention relates to a negative pressure generation method having the following steps (a)-(d) for an infectious disease control hospital room, an infectious disease patient transport vehicle, an ambulance, a biohazard laboratory, a temporary hospital, a hospital ship, and the like. It is an air conditioning system having a pathogen removal method and the following configurations (A)-(D).

(A) A negative pressure generation step of creating a negative pressure by using the intake air of an internal combustion engine. For example, using infectious disease patient transport vehicles, ambulance engines, hospitals, private power generation facilities in experimental facilities, emergency generators in field hospitals, power vehicle engines, or intake from hospital ships, ships, and other power engines of ships. , Negative pressure generation process to generate and maintain negative pressure. Preferably, a branch (merging) duct is attached to the intake duct of the internal combustion engine, and the tip thereof is installed in each room, a car, or a tent (FIG. 1). As a result, negative pressure is generated in the room, the inside of the vehicle, and the inside of the tent by the intake air accompanying the operation of the internal combustion engine, and the diffusion of pathogens can be prevented.

(B) An air supply step in which air containing pathogens (hereinafter referred to as contaminated air) in a vehicle, a room, or a tent is sucked into an engine by the negative pressure generated in the negative pressure generation step and sent into a combustion chamber. Preferably, contaminated air is introduced between the air cleaner of the internal combustion engine and the intake control system (throttle valve, turbocharger, intercooler, etc.). This is because 1-the negative pressure on the downstream side of the air cleaner is strong and the suction effect to contaminated air is high, 2-the air cleaner can block the external scattering of pathogens even when the engine is stopped, 3-the engine intake pressure. There is an advantage that the influence on the temperature and the temperature is small, there is no need to modify the intake control system, and the conventional engine performance can be maintained. However, the above arrangement method is not always applicable when the same effect can be achieved or when the piping space of the duct is limited.

(C) A detoxification combustion step in which the contaminated air sent into the combustion chamber by the air supply step is mixed and burned with fuel to obtain power and incinerate and inactivate pathogens in the contaminated air. The fuel is gasoline, kerosene, light oil, heavy oil, natural gas, LPG, alcohol, biofuel, waste tempura oil, which are designated fuels for internal combustion engines, or a mixture thereof with lubricating oil and additives. Since the fuel generates high-temperature, high-pressure gas of several hundred ° C. to 1,000 ° C. or higher in the combustion process, pathogens composed of organic substances can be incinerated and detoxified.

(D) An exhaust step in which the combustion gas generated in the detoxification combustion step is released into the atmosphere through a catalyst, a muffler, or the like. Unincinerated pathogens contained in combustion gas are thoroughly incinerated and removed by passing through a high-temperature catalyst and muffler.

Further, the negative pressure air conditioning system according to the present invention has the following configurations (A)-(D).

(A) A duct system that sucks out contaminated air inside a vehicle, room, ship, or tent and sends it to an internal combustion engine. The duct system is mainly composed of the following parts (1)-(3).
(1) A duct confluence that is repaired or added to the intake duct of an existing internal combustion engine.
(2) The main negative pressure duct extending from the duct confluence to the outside of the engine room or engine room.
(3) A negative pressure branch duct that extends from the main negative pressure duct to each room and tent.

(B) Sensors installed in the duct system and the intake duct of an internal combustion engine for measuring pressure, temperature, flow rate, flow velocity, pathogen content concentration, etc. of each duct.
(C) Valves installed in the duct system and the intake duct of an internal combustion engine for adjusting the opening / closing, pressure or flow rate of each duct.
(D) A calculation control unit that performs calculations based on data from the sensors and optimally controls the degree of opening / closing of the valves.

INDUSTRIAL APPLICABILITY The present invention supplies contaminated air in an infectious disease control room, an infectious disease patient transport vehicle, an ambulance, a biohazard laboratory, a temporary hospital, or a hospital ship to an intake duct of an internal combustion engine, thereby providing a vehicle, a room, a ship, or a tent. Negative pressure was generated and made sustainable. In addition, by using the combustion gas or heat generated by the internal combustion engine to inhibit the activity of the pathogen, or to destroy or incinerate its structure, it has become possible to detoxify the pathogen without using a filter.

It is an image diagram of this invention. It is explanatory drawing which concerns on 1st Embodiment of this invention. It is explanatory drawing which concerns on the 2nd Embodiment of this invention. It is explanatory drawing which concerns on 3rd Embodiment of this invention. It is explanatory drawing which concerns on 4th Embodiment of this invention. It is explanatory drawing which concerns on 5th Embodiment of this invention.

<First Embodiment>

FIG. 2 is an explanatory diagram according to the first embodiment of the present invention.

In this embodiment, application to an ambulance equipped with a gasoline engine is assumed. The inside of the vehicle body 2 is divided into a driver's cab R1 and a rear cabin (hereinafter referred to as a first aid room) R2 for accommodating a patient by a driver's cab partition 21. A negative pressure damper 23 is installed in the driver's cab partition 21 to unilaterally allow the air inside the vehicle to flow from the driver's cab R1 to the first aid room R2. Negative pressure branch ducts 32a and 32b for sucking air from the respective cabins are provided at appropriate locations in the driver's cab R1 and the first aid room R2, and choke valves 31a and 31b are provided for each negative pressure branch duct. Further, the negative pressure branch ducts 32a and 32b merge under the floor 20 of the vehicle or at an appropriate place in the engine room to form one negative pressure duct 33. Further, the tip of the negative pressure duct 33 is connected to the duct merging portion 34 added to the intake duct 12 of the engine. An enlarged view C shows an image of connection with the engine engine section (intake system). Preferably, the duct merging portion 34 is installed between the air cleaner 11 and the throttle valve 13 of the engine, and a choke valve 35 is further added between the air cleaner 11 and the duct merging portion 34. The controller 30 for controlling the choke valves 31a, 31b, 35 is installed at an appropriate place in the vehicle. In addition to gasoline engines, CNG engines and LPG engines based on gasoline engines should also adopt this introduction method.

Normally, when the internal combustion engine (gasoline engine) 1a is operating, the external air 101 is introduced through the air cleaner 11 and sucked into the combustion chamber through the intake duct 12, the throttle valve 13, and the intake branch duct 14 in sequence. Due to the intake, a negative pressure is generated inside the intake system extending from the air cleaner 11 to the combustion chamber. Due to this negative pressure, the contaminated air 102 and 103 in the cabin are sucked into the confluence portion 34 of the duct through the choke valves 31a and 31b, the negative pressure branch ducts 32a and 32b, and the negative pressure duct 33. At the merging portion 34, the contaminated air 102 and 103 and the clean air 101 from the air cleaner 11 are merged, and further sucked into the combustion chamber through the throttle valve 13 and the intake branch duct (intake manifold) 14. The high-temperature gas after combustion is discharged into the atmosphere through the exhaust branch duct 15, the exhaust duct and the like 16. In this way, by introducing the contaminated air in the cabin into the intake system of the engine and burning it in the engine, it is possible to incinerate or detoxify the pathogen. In general models, the negative pressure generated in the intake duct 12 (upstream side of the throttle valve 13) reaches 1 kPa or more, so as long as the engine is running, the negative pressure in the cabin is 2.5 Pa (CDC guideline). It is quite possible to create and maintain.

Further, in response to the requirement to maintain the negative pressure in the cabin at a constant pressure, the negative pressure in the intake duct 12 changes depending on the load condition of the engine. In order to solve this contradiction, it is possible to stabilize the negative pressure in the cabin by controlling the choke valves 31a and 31b installed in the negative pressure branch ducts 32a and 32b. For example, when the engine has a low load (idling or the like), the negative pressure in the intake duct 12 is low (absolute pressure is high), so that the suction effect is weak. By opening the choke valves 31a and 31b in this state, the intake resistance in the negative pressure branch ducts 32a and 32b can be reduced, and the suction effect on the cabin air 102 and 103 can be enhanced. On the other hand, when the engine is under heavy load, the negative pressure of the intake duct 12 is high (absolute pressure is low), so there is a risk of oversuctioning the air in the cabin. In this case, by closing the choke valves 31a and 31b, the suction effect into the cabin can be suppressed and the risk of oversuction can be avoided.

In addition, when the door of the vehicle is open, a large amount of air flows in from the outside of the vehicle, and it is expected that it will be difficult to create negative pressure. In this case, by throttle the choke valve 35 added to the intake duct 12, 100% of the air supplied to the engine can be covered by the contaminated air 102 and 103 in the cabin. Further, by increasing the engine speed, the suction effect on the contaminated air 102 and 103 can be maximized, and the scattering of pathogens can be prevented when the door is opened.

<Second embodiment>

FIG. 3 is an explanatory diagram according to a second embodiment of the present invention.

In this embodiment, application to a high-standard ambulance equipped with a diesel engine or an infectious disease patient transport vehicle is assumed. Similar to the first embodiment, the structure of the vehicle body 2 is divided into two cabins, a driver's cab R1 and a rescue room R2, by a partition 21. Negative pressure ducts 32a and 32b are provided in each cabin, and the contaminated air 102 and 103 in the cabin are collected in the negative pressure duct 33 and supplied to the intake system of the engine. In the case of a diesel engine, there is no throttle valve, but in most cases, a supercharger and an intercooler are provided. In this case, since the downstream side of the turbocharger has a positive pressure (absolute pressure> 1 atm), the negative pressure is generated only on the upstream side of the turbocharger 17. That is, in the present embodiment, the place where the duct merging portion 34 can be installed is limited to the space between the air cleaner 11 and the turbocharger 17. Further, a choke valve 35 is added between the air cleaner 11 and the duct merging portion 34. In addition to diesel engines, gasoline engines equipped with turbochargers should also adopt this introduction method.

Similar to the first embodiment, negative pressure is generated in the intake duct 12 as long as the engine is running. Due to this negative pressure, the contaminated air 102 and 103 in the cabin are sucked into the confluence portion 34 of the duct through the choke valves 31a and 31b, the negative pressure branch ducts 32a and 32b, and the negative pressure duct 33. The air merged at the merging portion 34 is sent to the combustion chamber through the supercharger 17, the intercooler 18, and the intake branch duct (intake manifold) 14. The high-temperature gas after combustion is discharged into the atmosphere through the exhaust branch duct 15, the supercharger 17 (in the case of a turbocharger), the exhaust duct and 16 and the like. Further, as in the first embodiment, by adjusting the choke valves 31a and 31b according to the load condition of the engine, the negative pressure in the cabin can be maintained at a constant value, or the maximum suction effect can be obtained when the door is opened. It is possible to exert. That is, the present embodiment has the same principle and effect as the first embodiment except for the difference in the introduction location of the contaminated air depending on the type of the engine.

<Third embodiment>

FIG. 4 is an explanatory diagram according to a third embodiment of the present invention.

In this embodiment, application to facilities dealing with pathogens such as general hospitals, infectious disease control rooms, and biohazard experimental buildings is assumed. For example, a negative pressure room (for example, an infectious disease room / patient accommodation room / biohazard laboratory) R5, an anterior room R4, and a corridor R3 are provided on each floor of a three-story building 40. A negative pressure damper 48 is installed on the wall 47 that partitions each room, and allows air to flow unilaterally from the corridor R3 → the front chamber R4 → the negative pressure chamber R5. A bed or a bio-experimental device 41 is installed in the negative pressure chamber R5, and a suction port of the negative pressure branch duct 32c is arranged near the upper portion thereof. By providing the choke valve 31c at the back of the suction port, the suction effect due to the negative pressure, that is, the degree of negative pressure in the room can be adjusted. The negative pressure branch duct 32c from each room is connected to the negative pressure duct 33. Further, the negative pressure duct 33 is connected to the intake duct of the private power generation facility 1c (for example, a diesel generator) on the roof through the piping space 49 that blows through the building. Although there is a space 46 above the ceiling 42 on each floor, it is said that the sealing property of the ceiling 42 is good and air inflow / outflow through the space 46 behind the ceiling cannot be performed.

When the private power generator 1c operates, a negative pressure is generated in the intake duct. By this negative pressure, the negative pressure can be generated and maintained by sucking the air 103 from the negative pressure chamber R5 through the negative pressure duct 33 and the negative pressure branch duct 32c. Further, the air 101 that has flowed in when the door is opened and closed and the air 101 and 102 introduced through the negative pressure damper 48 are also sucked together with the contaminated air 103, and are used as a private generator on the roof through the negative pressure branch duct 32c and the negative pressure duct 33. It is supplied up to 1c. Since the amount of contaminated air 103 supplied from the negative pressure chamber R5 is limited, the air required for operating the generator 1c is also supplied from its own air cleaner. The contaminated air introduced into the engine of the generator 1c is discharged into the atmosphere as exhaust gas 104 through a combustion process. Since the combustion process is performed under high temperature and high pressure conditions, pathogens contained in the contaminated air 103 can be incinerated and detoxified. However, since there are few facilities that constantly operate private power generation facilities and commercial power sources are often used in normal times, this system can be used as a backup for conventional negative pressure air conditioning systems. As a result, in the event of a large-scale infectious disease caused by a disaster or the like, even if the external power supply is lost and the production and supply of the HEPA filter is insufficient, the conventional function as a facility can be exhibited.

<Fourth Embodiment>

FIG. 5 is an explanatory diagram according to a fourth embodiment of the present invention.

In this embodiment, it is assumed that the container house or tent is applied to a temporary hospital, a field hospital, a gymnasium, an isolation booth installed in an indoor evacuation center, or the like. For example, four tents 50 are installed in an outdoor vacant lot. Inside, a front chamber R4 and a negative pressure chamber R5 are provided, and a negative pressure damper is installed on the partition wall thereof. A negative pressure branch duct 32d is attached to an appropriate position in the negative pressure chamber R5, and the tip thereof is connected to the negative pressure duct 33. The negative pressure duct 33 joins the intake duct of the emergency generator 1c installed outdoors.

Similar to the third embodiment, when the private power generator 1c operates, a negative pressure is generated in the intake duct. With this negative pressure, negative pressure can be generated and maintained by sucking air from the negative pressure chamber R5 of the tent 50. Further, since the tent 50 has weaker rigidity and lower airtightness than the permanent facility, it is assumed that a large amount of air will flow in from the outside. In this case, in order to maintain the suction effect on the contaminated air 103, the choke valve of the generator 1c engine is throttled to control that most or all of the air required for operation is introduced from the negative pressure chamber 5R. be able to. Preferably, a gasoline engine or a diesel engine may be adopted as the engine of the generator 1c, and a duct merging member 34 may be added to the intake duct thereof, but a power supply vehicle or another vehicle engine to which the merging member 34 is attached may be used. Is also good.

<Fifth Embodiment>

FIG. 6 is an explanatory diagram according to a fifth embodiment of the present invention.

In this embodiment, application to a hospital ship, a commercial ship, or a military ship is assumed. For example, the hospital ship 60 has a plurality of decks (deck), and each deck has a plurality of cabins (negative pressure room) 61. Further, a secondary negative pressure branch duct 32e having a choke valve 31e is provided in each cabin 61, and the air 102 and 103 in the room can be sucked. Further, the secondary negative pressure branch duct 32e from each cabin 61 merges with the primary negative pressure branch duct 32E arranged for each deck, and finally joins up to one negative pressure duct 33.

On the other hand, a main engine (diesel engine or gas turbine) 64 and a generator or auxiliary engine 65 mainly used during berthing are arranged at the central rear portion of the hull 60. The intake duct 66 and the exhaust duct 67 are provided so as to reach the uppermost deck. Further, a duct merging portion 34 is provided at an appropriate position of the intake duct 66, and the negative pressure duct 33 is attached thereto. Further, a choke valve 35 is added at an appropriate position on the intake duct 66 on the upstream side of the duct merging portion 34. The choke valves 31e and 35 are equipped so as to be controllable from the command room or the control room 62.

As long as the hospital ship 60 is in operation, the main engine 64 or an internal combustion engine such as a generator or an auxiliary power engine 65 is constantly operated. Therefore, a negative pressure is always maintained in the intake duct 66. By this negative pressure, negative pressure can be generated and maintained by sucking air 102 and 103 in each cabin 61 through the negative pressure duct 33, the primary negative pressure branch duct 32E, and the secondary negative pressure branch duct 32e. The sucked air 102 and 103 are supplied to the internal combustion engine and released into the atmosphere through a combustion process. At that time, the pathogens contained in the air 102 and 103 are incinerated, detoxified, and discharged together with the exhaust gas 104.

When berthed, the amount of air consumed by the generator or auxiliary engine 65 is small compared to the large number of cabins 61, that is, the large supply of air 102 and 103. As a result, the suction effect on each cabin 61 becomes insufficient, and it is expected that sufficient negative pressure cannot be generated and maintained. In this case, the choke valve 35 provided on the upstream side of the duct merging portion 34 on the intake duct 66 is throttled to increase the negative pressure in the intake duct 66 and enhance the suction effect on the air 102 and 103 in the cabin. be able to.

Further, in the case of a large ship, the piping distance to the negative pressure duct 33 differs greatly depending on the cabin 61, and the pressure loss due to the flow resistance also differs greatly. In this case, the negative pressure condition can be adjusted for each cabin 61 by controlling the opening / closing condition of the choke valve 31e provided in each secondary negative pressure branch duct 32e. Preferably, a choke valve 36 is also provided in the negative pressure duct 33 or each primary negative pressure branch duct 32E so that the negative pressure condition can be adjusted for each deck or each section.

The above embodiment is just one of the best embodiments at present. The structure, material, duct arrangement method, internal combustion engine type, fuel used, standard and connection method of each member, control system, calculation method, algorithm, program, etc. of the present invention are within the scope of the present invention. And it can be changed in various ways.

1a: Internal combustion engine (gasoline engine)
1b: Internal combustion engine (diesel engine)
1c: Private power generation or emergency generator 2: Body 10: Power output destination by internal combustion engine (clutch, transmission, generator, etc.)
11: Air cleaner 12: Intake duct 13: Throttle valve
14: Intake branch duct (intake manifold)
15: Exhaust branch duct 16: Exhaust duct, etc. (catalyst, muffler, EGR, other sensors, etc. omitted)
17: Supercharger (turbocharger, supercharger)
18: Intercooler 20: Floor (floor)
21: Driver's cab partition 22: Air filter (outside air inlet)
23: Negative pressure damper
30: Controller (control unit)
31a: Choke valve (driver's cab)
31b: Choke valve (rescue / transport room)
31c: Choke valve (hospital room / biohazard research facility)
31d: Choke valve (temporary hospital room)
31e: Choke valve (cabin)
32a: Negative pressure branch duct (driver's cab)
32b: Negative pressure branch duct (rescue / transport room)
32c: Negative pressure branch duct (hospital room / biohazard research facility)
32d: Negative pressure branch duct (temporary hospital room, etc.)
32E: Primary negative pressure branch duct (ships, etc.)
32e: Secondary negative pressure branch duct (ships, etc.)
33: Negative pressure duct 34: Duct confluence 35: Choke valve (added to the intake duct)
36: Choke valve (collective control)
40: Building frame 41: Bed 42: Ceiling
43: Corridor / passage 44: Front room 45: Hospital room 46: Ceiling space 47: Wall 48: Negative pressure damper 49: Vertical piping space 50: Temporary hospital room (container / tent / clean booth / field hospital, etc.)
51: Door 52: Front room 53: Negative pressure damper 60: Hull (hospital ship / commercial ship / military ship)
61: Cabin (negative pressure room, etc.)
62: Command room or control room 63: Elevator 64: Main engine (marine diesel engine or gas turbine)
65: Generator or auxiliary power engine 66: Intake duct 67: Exhaust duct 101: Clean air 102: Air that is unlikely to be contaminated
103: Air that is likely to be contaminated 104: Exhaust
A: Air flow path diagram in the present invention B: Air flow path diagram in an existing internal combustion engine
C: Partially enlarged image of the intake / exhaust system of the internal combustion engine R1: Driver's cab R2: Rescue / transport room R3: Corridor / passage R4: Front room R5: Infectious disease room / patient accommodation room / biohazard laboratory

Claims (3)

Using the negative pressure generated in the intake system of the internal combustion engine for infectious disease patient transport vehicles, infectious disease control rooms, biohazard laboratories, container houses, tents, clean booths, field hospitals, hospital ships, commercial ships, and ships. An air conditioning system that generates and maintains negative pressure by sucking air inside the car, indoors, facilities, and ships. Air containing at least one of the pathogen bacteria, fungi, and viruses, or air that may contain the pathogen, is supplied to the internal combustion engine, and the combustion gas, heat, or pressure in the combustion process is used to utilize the pathogen. An air conditioning system that makes the virus harmless. The second aspect of claim 2, wherein any or a plurality of a gasoline engine, a diesel engine, an LPG engine, a CNG engine, a rotary engine, a gas turbine engine, a modified engine based on the engine, or a generator having the internal combustion engine is used. Air conditioning system.

Images