A multi-split air conditioning system with fresh air cooling

Abstract

The utility model discloses a multi-split air conditioning system with fresh air refrigeration, comprising an outdoor unit and several indoor units, wherein a condenser and an outdoor fan are arranged in the outdoor unit, an indoor evaporator is arranged in the indoor unit, the condenser and the several indoor evaporators are connected by pipelines to form a refrigerant circulation loop, and the several indoor evaporators are arranged in parallel; the system also includes an outdoor electronic expansion valve, a liquid storage device, an outdoor unit liquid side valve, several indoor electronic expansion valves, an outdoor unit gas side valve and a compressor; the outdoor unit is connected to a ventilation duct, and a condensate spray cooling system and an air supply temperature sensor are arranged on the ventilation duct; one side of the ventilation duct is connected to a fresh air system, and the fresh air system is used to ventilate the room. The utility model determines the opening state of the air valve through the air supply temperature sensor, can effectively reduce the condenser temperature, improve the energy efficiency of the multi-split unit, and achieve the purpose of greatly reducing energy consumption.

Description

Technical Field

[0001] The utility model relates to the technical field of air conditioning, in particular to a multi-connected air conditioning system with fresh air refrigeration. Background Art

[0002] The multi-split air conditioning system is a high-efficiency refrigerant air conditioning system that satisfies the indoor cooling and heating load requirements in a timely manner by controlling the refrigerant circulation volume of the compressor and the refrigerant flow entering the indoor heat exchanger.

[0003] In the prior art one-to-two air conditioning system, in the cooling mode, the high-temperature and high-pressure refrigerant is directly cooled by the outdoor wind in the condenser. After passing through the expansion valve, the low-temperature and low-pressure refrigerant will flow to the two indoor evaporators at the same time to evaporate and take away the indoor heat. The condensed water formed by the water vapor in the air encountering the surface cooler is discharged. At the same time, since the multi-split system has no air duct, an independent fresh air system must be set up to send the outdoor fresh air directly to the room. This causes two problems. One is that the outdoor temperature is high in summer, so the temperature of the condenser is also high after being cooled, resulting in low energy efficiency of the multi-split system. The other is that the high-temperature fresh air is sent to the room, causing discomfort to the personnel and bringing a lot of heat that needs to be cooled. Both of these will cause energy waste. Utility Model Content

[0004] The utility model aims to provide a multi-split air conditioning system with fresh air refrigeration to solve the problems of high condensation temperature and waste of fresh air energy in the use process of the existing air conditioning system.

[0005] To achieve the above-mentioned object, the utility model provides a multi-split air conditioning system with fresh air refrigeration, comprising an outdoor unit and several indoor units, wherein a condenser and an outdoor fan are arranged in the outdoor unit, an indoor evaporator is arranged in the indoor unit, the condenser is connected to several indoor evaporators through pipelines to form a refrigerant circulation loop, and several indoor evaporators are arranged in parallel; an outdoor electronic expansion valve, a liquid storage device, an outdoor unit liquid side valve, several indoor electronic expansion valves, an outdoor unit gas side valve and a compressor are arranged in sequence on the refrigerant circulation loop, the indoor electronic expansion valve and the indoor evaporator are arranged one by one, the indoor evaporator is arranged between the indoor electronic expansion valve and the outdoor unit gas side valve, and the condenser is arranged between the outdoor electronic expansion valve and the compressor; the outdoor unit is connected to a ventilation duct, a condensate spray cooling system is arranged on the ventilation duct, a cooling air valve is installed on the ventilation duct, and the cooling air valve is arranged between the condensate spray cooling system and the condenser; a fresh air system is connected to one side of the ventilation duct, and the fresh air system is used to ventilate the room.

[0006] Preferably, the condensate spray cooling system includes a water tank, a condensate pipe is provided on the indoor unit, and the end of the condensate pipe is connected to the water tank; a circulating water pump is provided in the water tank, a spray nozzle is provided in the ventilation duct, the water outlet end of the circulating water pump is connected to the spray nozzle through a water pipe, and the spray nozzle is provided directly above the water tank.

[0007] Preferably, an air supply temperature sensor is installed in the ventilation duct.

[0008] Preferably, the fresh air system includes a fresh air duct, a connecting duct is arranged between the fresh air duct and the ventilation duct, the fresh air duct is connected with the ventilation duct through the connecting duct, the connecting duct is arranged on the side of the cooling air valve away from the condenser, and a first fresh air valve is installed on the connecting duct; a second fresh air valve is installed at the air inlet end of the fresh air duct, a fresh air fan is installed in the fresh air duct, and the connecting duct is arranged between the second fresh air valve and the fresh air fan.

[0009] Preferably, an outdoor temperature sensor is provided on the outside of the fresh air duct.

[0010] Preferably, the fresh air duct is provided with a plurality of air outlets, and the air outlets are arranged in a one-to-one correspondence with the indoor units.

[0011] Preferably, the fresh air fan is a variable frequency fan, and the compressor is a variable frequency compressor.

[0012] A multi-split air conditioner comprises the multi-split air conditioner system with fresh air refrigeration.

[0013] Compared with the prior art, the utility model has the following advantages and technical effects:

[0014] The utility model provides a multi-split air-conditioning system with fresh air cooling, which further cools the outdoor high-temperature air by arranging a condensed water spray cooling system, and a part of the low-temperature air is sent to the outdoor unit to cool the condenser, so that the condensation temperature is in a low state, thereby improving the energy efficiency of the multi-split air conditioner; another part of the cooled outdoor air provides low-temperature fresh air for the indoor through the fresh air system; by detecting the supply air temperature, when the supply air temperature is reasonable, the indoor unit will stop running, the refrigerant circulation of the multi-split air conditioner will be in a standby state, and cooling will be completely carried out by the fresh air; when the outdoor temperature is further reduced, the condensed water spray system will be closed, and the outdoor air will be directly used for cooling through the fresh air system, thereby achieving a significant reduction in energy consumption. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] In order to more clearly illustrate the embodiments of the utility model or the technical solutions in the prior art, the drawings required for use in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0016] Figure 1 It is a structural schematic diagram of a one-to-two air conditioning system in the prior art;

[0017] Figure 2 This is a structural schematic diagram of a multi-split air conditioning system with fresh air refrigeration of the utility model;

[0018] In the figure: 1. Condenser; 2. Outdoor fan; 3. Outdoor electronic expansion valve; 4. Liquid storage tank; 5. Liquid side valve of outdoor unit; 6. Indoor electronic expansion valve; 7. Condensate pipe; 8. Indoor evaporator; 9. Gas side valve of outdoor unit; 10. Compressor; 11. Fresh air fan; 12. Circulating water pump; 13. Spray nozzle; 14. First fresh air valve; 15. Cooling air valve; 16. Second fresh air valve; 17. Supply air temperature sensor; 18. Outdoor temperature sensor; 19. Water tank. DETAILED DESCRIPTION

[0019] It should be noted that, in the absence of conflict, the embodiments of the present invention and the features of the embodiments can be combined with each other. The described embodiments are only a part of the embodiments of the present invention, not all of them. All other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention. The present invention will be described in detail below with reference to the accompanying drawings and in combination with the embodiments.

[0020] like Figure 2As shown in, the utility model provides a multi-split air-conditioning system with fresh air refrigeration, including an outdoor unit and several indoor units, wherein a condenser 1 and an outdoor fan 2 are arranged in the outdoor unit, and an indoor evaporator 8 is arranged in the indoor unit, and the condenser 1 is connected with the several indoor evaporators 8 by pipelines to form a refrigerant circulation loop, and the several indoor evaporators 8 are arranged in parallel; an outdoor electronic expansion valve 3, a liquid storage device 4, an outdoor unit liquid side valve 5, several indoor electronic expansion valves 6, an outdoor unit gas side valve 9 and a compressor 10 are arranged in sequence on the refrigerant circulation loop, the indoor electronic expansion valve 6 and the indoor evaporator 8 are arranged one by one, the indoor evaporator 8 is arranged between the indoor electronic expansion valve 6 and the outdoor unit gas side valve 9, and the condenser 1 is arranged between the outdoor electronic expansion valve 3 and the compressor 10; the outdoor unit is connected with a ventilation duct, a condensate water spray cooling system is arranged on the ventilation duct, a cooling air valve 15 is installed on the ventilation duct, and the cooling air valve 15 is arranged between the condensate water spray cooling system and the condenser 1; a fresh air system is connected to one side of the ventilation duct, and the fresh air system is used to ventilate the room.

[0021] A further optimized solution is that the condensation water spray cooling system includes a water tank 19, a condensation water pipe 7 is provided on the indoor unit, and the end of the condensation water pipe 7 is connected to the water tank 19; a circulating water pump 12 is provided in the water tank 19, and a spray nozzle 13 is provided in the ventilation duct, and the water outlet end of the circulating water pump 12 is connected to the spray nozzle 13 through a water pipe, and the spray nozzle 13 is provided directly above the water tank 19.

[0022] To further optimize the solution, an air supply temperature sensor 17 is installed in the ventilation duct.

[0023] A further optimization scheme is provided, in which the fresh air system includes a fresh air duct, a connecting pipe is arranged between the fresh air duct and the ventilation duct, the fresh air duct is connected with the ventilation duct through the connecting pipe, the connecting pipe is arranged on the side of the cooling air valve 15 away from the condenser 1, and a first fresh air valve 14 is installed on the connecting pipe; a second fresh air valve 16 is installed at the air inlet end of the fresh air duct, a fresh air fan 11 is installed in the fresh air duct, and the connecting pipe is arranged between the second fresh air valve 16 and the fresh air fan 11.

[0024] To further optimize the solution, an outdoor temperature sensor 18 is provided on the outside of the fresh air duct.

[0025] To further optimize the solution, the fresh air duct is provided with several air outlets, and the air outlets are provided in one-to-one correspondence with the indoor units.

[0026] According to a further optimization scheme, the fresh air fan 11 is a variable frequency fan, and the compressor 10 is a variable frequency compressor 10.

[0027] The utility model provides a multi-split air-conditioning system with fresh air cooling, which is additionally provided with a condensed water spray cooling system, and is connected with the condenser 1 of the outdoor unit and the fresh air duct, and a corresponding air valve is provided to control the working mode of the fresh air system, so that the condensing temperature can be further reduced, and the energy efficiency of the unit can be effectively improved. At the same time, cooling is achieved through the fresh air system, which greatly reduces the energy consumption of the building.

[0028] Specifically, one end of the condenser 1 is connected to the ventilation duct of the condensation water spray system, a cooling air valve 15 is installed on the ventilation duct, an air supply temperature sensor 17 is installed on the ventilation duct, the replenishment water of the condensation water spray system is the condensation water of the indoor evaporator 8, which is stored in the water tank 19 through the condensation water pipe 7 and connected to the spray nozzle 13 by the circulating water pump 12. One side of the ventilation duct is connected to the fresh air duct through a connecting pipe, a first fresh air valve 14 is installed on the connecting pipe, a second fresh air valve 16 is installed on the fresh air duct, and an outdoor temperature sensor 18 is installed at the same time, so that the fresh air can work in different modes to reduce energy consumption.

[0029] Specifically, the working principle of the multi-split air conditioning system with fresh air cooling provided by the utility model is as follows: when the indoor unit is started, the evaporation temperature is lower than the dew point temperature of the indoor air and the fresh air, and condensed water is generated. The condensed water is led to the water tank 19, and is pumped to the spray nozzle 13 through the circulating water pump 12 to spray and cool the outdoor air. A part of the cooled outdoor air is cooled and lowered on the condenser 1 through the opened cooling air valve 15, so that the condensation temperature is reduced to a lower state, thereby improving the energy efficiency of the multi-split air conditioner. At the same time, another part of the cooled outdoor air is sent to the room through the opened first fresh air valve 14 and the fresh air fan 11 to provide fresh air. By detecting the supply air temperature, when the supply air temperature is appropriate, the indoor unit will stop running. At this time, the cooling air valve 15 is closed, the first fresh air valve 14 is opened, the refrigerant circulation circuit is in a standby state, and the cooling is completely carried out by the fresh air. When the outdoor temperature drops further, the condensate spray system is turned off, the first fresh air valve 14 is closed, and the second fresh air valve 16 is opened, and the outdoor air is directly cooled through the fresh air system, thereby significantly reducing energy consumption.

[0030] The above are only preferred specific implementations of the present application, but the protection scope of the present application is not limited thereto. Any changes or substitutions that can be easily conceived by any technician familiar with the technical field within the technical scope disclosed in the present application should be covered within the protection scope of the present application.

Claims

1. A multi-split air conditioning system with fresh air cooling, characterized in that: The invention comprises an outdoor unit and a plurality of indoor units, wherein the outdoor unit is provided with a condenser (1) and an outdoor fan (2), and the indoor unit is provided with an indoor evaporator (8). The condenser (1) and the plurality of indoor evaporators (8) are connected via pipelines to form a refrigerant circulation loop, and the plurality of indoor evaporators (8) are arranged in parallel; the refrigerant circulation loop is provided with an outdoor electronic expansion valve (3), a liquid storage tank (4), an outdoor unit liquid side valve (5), a plurality of indoor electronic expansion valves (6), an outdoor unit gas side valve (9) and a compressor (10) in sequence, and the indoor electronic expansion valve (6) and the indoor evaporator are connected to each other via a pipeline. The indoor evaporator (8) is arranged in a one-to-one correspondence with the indoor electronic expansion valve (6) and the outdoor unit air side valve (9), and the condenser (1) is arranged between the outdoor electronic expansion valve (3) and the compressor (10); the outdoor unit is connected to a ventilation duct, a condensate spray cooling system is arranged on the ventilation duct, a cooling air valve (15) is installed on the ventilation duct, and the cooling air valve (15) is arranged between the condensate spray cooling system and the condenser (1); one side of the ventilation duct is connected to a fresh air system, and the fresh air system is used to ventilate the room.

2. The multi-split air conditioning system with fresh air cooling according to claim 1, characterized in that: The condensate spray cooling system comprises a water tank (19); a condensate pipe (7) is provided on the indoor unit, and the end of the condensate pipe (7) is connected to the water tank (19); a circulating water pump (12) is provided in the water tank (19); a spray nozzle (13) is provided in the ventilation duct, and the water outlet end of the circulating water pump (12) is connected to the spray nozzle (13) through a water pipe; the spray nozzle (13) is provided directly above the water tank (19).

3. The multi-split air conditioning system with fresh air cooling according to claim 2, characterized in that: An air supply temperature sensor (17) is installed in the ventilation duct.

4. The multi-split air conditioning system with fresh air cooling according to claim 1, characterized in that: The fresh air system comprises a fresh air duct, a connecting duct is arranged between the fresh air duct and the ventilation duct, the fresh air duct is connected to the ventilation duct through the connecting duct, the connecting duct is arranged on a side of the cooling air valve (15) away from the condenser (1), and a first fresh air valve (14) is installed on the connecting duct; a second fresh air valve (16) is installed at the air inlet end of the fresh air duct, a fresh air fan (11) is installed in the fresh air duct, and the connecting duct is arranged between the second fresh air valve (16) and the fresh air fan (11).

5. The multi-split air conditioning system with fresh air cooling according to claim 4, characterized in that: An outdoor temperature sensor (18) is arranged on the outside of the fresh air duct.

6. The multi-split air conditioning system with fresh air cooling according to claim 4, characterized in that: The fresh air duct is provided with a plurality of air outlets, and the air outlets are arranged in one-to-one correspondence with the indoor units.

7. The multi-split air conditioning system with fresh air cooling according to claim 4, characterized in that: The fresh air fan (11) is a variable frequency fan, and the compressor (10) is a variable frequency compressor (10).

8. A multi-split air conditioner, characterized in that: A multi-split air conditioning system with fresh air cooling comprising any one of claims 1 to 7.

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