RU1779884C - Air-conditioning system - Google Patents

Abstract

SUMMARY OF THE INVENTION: Fans are mounted on the supply and exhaust ducts. The central air conditioner is connected to the supply air duct and contains a heat exchanger, an irrigation chamber with a drip pan, a local air conditioner with a heat exchanger-cooler, a cold water supply system ° pl cooling system with heaters and cold water in the evaporator and condenser circuits refrigeration machine, condenser circuit water cooler, jumpers connecting the evaporator and condenser circuits, shut-off and control valves. The heat exchanger and heat exchanger-cooler are connected in parallel by the supply and return pipelines to the evaporator circuit with the possibility of their individual adjustment. A heat exchanger is additionally placed in the pallet and connected to the return pipe of the heat exchanger-cooler with the possibility of adjustment and shutdown. 1 ill.

Description

;

The invention relates to ventilation and air conditioning.

A known room air conditioning system comprising fans installed on the supply and exhaust ducts, a central air conditioner in communication with the supply air duct and including a heat exchanger, an irrigation chamber, a local air conditioner with a heat exchanger-cooler located in the room, an external heat source, a cooling system with tanks-accumulators of heated and cold water in the circuits of the evaporator and condenser of the chiller, water cooler of the condenser circuit. The heat exchanger of the central air conditioner is connected to the heat supply source, and the irrigation chamber and air coolers of the local air conditioners are connected to the storage tanks of the refrigeration evaporator

machines through the supply and return pipelines, the water cooler of the condenser circuit of the chiller is connected exclusively to the condenser of the chiller.

The nature of the moisture-humid treatment of the outdoor air supplied to the air-conditioned room by this system depends on the value of its heat content. During periods of the year when the heat content of the outside air-i is less than the heat content of the calculated supply air parameter (winter rehim). her processing is carried out. From the heat exchanger of the centered air conditioning unit to the heat content, the calculation of their supply air parameters and the flow rate of air inlet chambers made by draining it from the sump to a. pi recirculation CXMPM tetosuspension of outdoor and supply air

| Yu

00 00

.N

correspond to (transient), adiabatic hydration is carried out. At a time when the heat content of the outside air exceeds the heat content of the supply air (summer mode), its heat and humidity control is carried out by supplying cold water to the irrigation chamber from the accumulator tanks of the evaporator circuit of the refrigeration machine. Excess heat inside the air-conditioned room is absorbed in the heat exchanger-cooler of the local air conditioner, in which the air treatment processes are constant during the year. The piping of the refrigeration supply system, even during the winter regime of heat-humidity air treatment, determines the need for the operation of the refrigeration machine, which causes unreasonable energy costs for generating cold during this period of the year.

These shortcomings are largely overcome in an air conditioning system containing fans installed on the supply and exhaust ducts, a central air conditioner connected to the supply duct and including a heat exchanger, an irrigation chamber with a tray, a local air conditioner with a heat exchanger-cooler, located in the room, external heat source, cooling system with storage tanks for heated and cold water in the circuits of the evaporator and condenser of the refrigeration machine, water cooler condenser circuit, with jumpers connecting the evaporator and condenser circuits, shut-off and control valves, while the heat exchanger of the central air conditioner and the heat exchanger-cooler of the local air conditioner are connected in parallel to the evaporator circuit with individual supply and return pipes, the technical solution is the most close to the claimed solution and is proposed as a prototype. In this system, the summer mode of heat-moisture treatment of the outdoor air is carried out initially in the heat exchanger of the central air conditioner until the supply air is heated by supplying cold water from the accumulator tanks of the evaporator circuit of the refrigeration machine, and then, if necessary, in the irrigation chamber by adiabatic humidification to the calculated supply air parameters. For periods of the year when the water temperature from the water cooler of the condenser circuit of the chiller ensures the creation of the required parameters

supply air, the supply of this water to the accumulator tanks of the evaporator circuit of the chiller and back from them to the water cooler of the condenser circuit, bypassing the chiller, is done through jumpers connecting its circuits.

A significant drawback of this technical solution is the significant energy consumption for heating the outdoor air during the winter regime of heat-moisture treatment and the absence of heat recovery from the return water of the heat exchanger of the local air conditioner, which ultimately determines unreasonable

5 operating costs during this period of the year

The purpose of the invention is to reduce operating costs during the winter regime of heat-moisture treatment of air.

0 This goal is achieved by the fact that in the pan of the irrigation chamber there is an additional heat exchanger connected to the return pipe of the heat exchanger-cooler of the local air conditioner. At the same time, in order to ensure adjustment and shutdown of the additional heat exchanger, the connecting lines and the return pipe between the points of their connection contain shut-off and control valves.

In the winter period, when external air is required to be heated, the water flows in the opposite direction when heated in the heat exchanger-cooler of the local air conditioner

5 to the pipeline and the connecting line to the heat exchanger located in the pan of the irrigation chamber, while giving heat to the water in the pan. Shut-off and control valves installed

0 on the return pipe of the local air conditioner, is in the closed position. The water cooled in the heat exchanger then flows to the return pipe of the local air conditioner and then to the accumulator tanks of the evaporator circuit of the chiller. The heat-moisture treatment of the outdoor air supplied to the air-conditioned room during this period is carried out initially in the heat exchanger of the central air conditioner installed in front of the irrigation chamber, in which it is partially heated by supplying hot water from an external heat supply source and subsequent heating

5 and humidification to the supply air parameters in the irrigation chamber. The heating and humidification of the outside air is carried out using warm water supplied according to the recirculation scheme, located in the subframe of the irrigation chamber

A new technical solution is the placement of an additional heat exchanger in the pan of the irrigation chamber connected to the return pipe of the heat exchanger-cooler of the local air conditioner with the possibility of adjustment and shutdown. This allows during the year, when the heat content of the outdoor air below the heat content of the supply air, to use the potential of warm water, which is removed from the heat exchanger-cooler of local air conditioners, to heat and humidify the outdoor air in the irrigation chamber of the central air conditioner, which significantly reduces the load on the external air a heat supply source and a water cooler of the condenser circuit of the refrigeration machine, and consequently, to reduce operating costs. The combination of the above features allows us to conclude that the claimed technical solution meets the criterion of novelty.

The drawing shows an air conditioning system.

The air conditioning system includes a central air conditioner comprising a heat exchanger 1 and an irrigation chamber 2 installed behind it, a supply 3 and exhaust 4 ventilation networks with fans, a local air conditioner with a heat exchanger-cooler 5, and a cooling system. consisting of a refrigerating machine 6, storage tanks of heated 7 and cold 8 water with a supply of 9 and 10 reverse pipelines in the evaporator circuit, storage tanks of heated 11 and cold 12 water with a supply of 13 and 14 reverse pipelines in the condenser circuit chiller and water cooler 15 of the condenser circuit of the chiller with piping. The heat exchanger of the central air conditioner is connected to the accumulator tanks of the evaporator circuit of the chiller by means of supply 16 and return 17 pipelines equipped with shut-off and control valves 18 and 19. In addition, a heat supply circuit 20 is connected to this heat exchanger. The heat exchanger is a cooler of the local air conditioner the evaporator of the refrigeration machine is connected to the tanks-accumulators of the circuit by means of the supply 21 and return 22 pipelines, on which the control valves 23 and 24 are installed. The supply and return pipelines of the evaporator and condenser circuits of the chiller are connected using jumpers 25 and 26, on which are installed the control valves 27 and 28. The connection 29 of the irrigation chamber is made exclusively according to the recirculation circuit. A heat exchanger 31 is placed in the pan 30 of the irrigation chamber, the inlet 32 and the outlet 33 of which are connected via the connecting lines 34 and 35 before and after the shut-off and control valves 24 to the return pipe of the local air conditioner. On the connecting line 34 is installed shut-off and control valves 36.

The air conditioning system operates as follows.

In winter operation, when outside air is required and the potential of the condenser circuit of the chiller water cooled in the water cooler 15 is sufficient to remove excess heat in the air-conditioned room, it enters the cold water tank 12 of the condenser circuit of the chiller. From the cold water tank 12 through the supply pipe 13 of this circuit, cold water through the jumper 26 enters the return pipe 10 and then into the cold water tank 8 of the evaporator circuit of the refrigeration machine. Subsequently, this water is sent to the heat exchanger-cooler of the local air conditioner 5. In the local air conditioner 5, the water releases cold, it itself is heated and is supplied through the return pipe 22 through the connecting line 34 to the heat exchanger 31 located in the pan 30 of the irrigation chamber. The shut-off and control valves 24 installed on the return line of the local air conditioner are in the closed position. Having given heat to the water located in the pan 30 of the irrigation chamber, the water cooled in the heat exchanger 31 enters through the connecting line 35 again to the return pipe 22 of the local air conditioner and then to the heated water tank 7 of the evaporator circuit of the refrigeration machine. From the heated water tank 7 through the supply pipe 9 of this circuit, the water through the jumper 25 enters the return pipe 14, and then into the heated water tank 11 of the condenser circuit of the refrigeration machine. Subsequently, this water is supplied from the heated water tank 11 to the water cooler 15 of the condenser circuit of the chiller. The external air supplied to the air-conditioned room via the supply ventilation network 3 is partially heated in the heat exchanger of the central air conditioner by supplying heat from

external heat supply source 20, and then heated and moistened in the irrigation chamber 2 to the calculated supply air parameters with warm water located in the pan 30 of the irrigation chamber and supplied through the piping 29 according to the recirculation circuit. The exhaust air is discharged into the atmosphere through the exhaust ventilation network 4. At a time when the potential of the water cooled in the water cooler 15 of the condenser circuit of the chiller is insufficient to remove excess heat in the air-conditioned room, shut-off and control valves 27 and 28 are closed on the jumpers 25, 26. In this case, the cooled water in the water cooler 15 of the circuit the condenser of the chiller is supplied solely for cooling the condensers of the working chiller 6, moving first through the feed 13 and then through the return 14 pipelines of this circuit. Cold water, used to remove excess heat inside the air-conditioned room, from the Warm water tank 7 of the circuit of the evaporator of the chiller enters the evaporator for cooling, passing through the supply 9, and then the return 10 pipelines of this circuit. The process of wet-humid treatment of outdoor air during this period is similar to the above, except that the flow of heat from the external heat supply 20 decreases and subsequently stops when the potential of warm water located in the pan 30 of the irrigation chamber to heat this air is sufficient. In the transition mode, when it is not required to heat the outside air, the shut-off and regulating valves 36 on the connecting line 34 are closed and the shut-off and regulating valves 24 on the return pipe 22 are opened. In this case, the water flows through the return pipe of the local air conditioner 22 directly into the warm water tank 7 of the evaporator circuit of the chiller 6. In the irrigation chamber 2, the outside air is only adiabatically humidified by the water supplied by the recirculation circuit, such as in the pan 30., In summer mode, when the heat content outside air exceeds the heat content of the supply air, its heat-moisture treatment is carried out by supplying cold water from the cold water tank 8 of the evaporator circuit of the refrigeration machine 6 to the heat exchanger 1 of the central air conditioner, followed by, if necessary, adiabatic humidification in the irrigation chamber 2. Excess heat recirculated air is absorbed in the local air conditioner 5, the process of supplying cold water 8, which is similar to the transition

mode.

The technical and economic advantage of the claimed technical solution in comparison with the prototype is that the placement of an additional heat exchanger in the pan of the irrigation chamber connected to the return pipe of the heat exchanger-cooler of the local air conditioner and equipped with shut-off and control valves to ensure its adjustment

5 and shutdown, allows in the winter season to utilize the water heated in the heat exchanger-cooler of the local air conditioner for heating with humidification of the outdoor air in the irrigation chamber, which

0 leads to a decrease in the loads on the water cooler of the condenser circuit of the chiller and on the external heat supply source, and, as a result, to reduce the operating costs for processing

5 air.

The air conditioning system can be used to process air when air conditioning any buildings

Claims (1)

0 Claims A room air conditioning system comprising fans mounted on supply and exhaust ducts, a central air conditioner, 5 connected with the supply air duct and including a heat exchanger, an irrigation chamber with a tray, a local air conditioner with a heat exchanger-cooler, located in the room, an external heat source, a cooling system with heated and cold water storage tanks in the evaporator and condenser circuits of the refrigeration machine, water - condenser circuit cooler 5 jumpers connecting the evaporator and condenser circuits, shut-off and control valves, while the central heat exchanger and the local air-conditioner heat exchanger-cooler are connected in parallel by the supply and return pipelines to the evaporator circuit with the possibility of their individual adjustment, which is different. that, in order to reduce operational 5, the system further comprises a heat exchanger located in a pan and connected to the return pipe of the heat exchanger-cooler of the local air conditioner with the possibility of adjustment and shutdown.