CN201819477U - DC frequency conversion multi-connected multi-functional air conditioner - Google Patents

Abstract

The utility model discloses a direct-current frequency conversion multi-split air conditioner, which comprises a direct-current frequency conversion compressor (1), an oil-gas separator (2), a four-way valve (3), a condenser (4), an external gas-liquid separator (7), a plurality of groups of indoor expansion valves (9) connected in parallel and an indoor unit (10), wherein the direct-current frequency conversion air conditioner also comprises a heat recovery device, a heat pump water heater and a floor heat radiation heating device; the heat recovery device comprises a first water-refrigerant heat exchanger (13), a first hot water tank (14) and a water pump (15); the heat pump water heater comprises a fixed-frequency compressor (22), a second water-refrigerant heat exchanger (23), a throttling device (24), an evaporator (25) and a gas-liquid separator II (26); the floor radiant heating apparatus includes a condensing coil (27), a second hot water tank (28), and a hot water radiation circulating device. Adopt the utility model discloses not only energy-conserving, the near-ground heating of being convenient for again in winter.

Description

DC frequency conversion multi-connected multi-functional air conditioner

Technical field:

The utility model relates to the technical field of air conditioners, in particular to a DC frequency conversion multi-connection multifunctional air conditioner.

Background technique:

DC inverter multi-line air conditioner includes DC inverter compressor, oil-gas separator, four-way valve, condenser, liquid receiver, stop valve, external gas-liquid separator, indoor expansion valve, and multiple sets of parallel indoor expansion valves and indoor units ; The exhaust end of the DC variable frequency compressor is connected with the inlet end of the oil-gas separator, and the outlet end of the oil-gas separator is connected with the four-way valve; the other three ends of the four-way valve are respectively connected with the external gas-liquid The separator, the condenser, and the indoor unit are connected, and the condenser is connected with the indoor unit through a liquid receiver and an indoor expansion valve in sequence; a heating expansion valve is connected between the condenser and the liquid receiver. Using the above-mentioned existing technology, when the conventional DC inverter multi-connected air conditioner is running in summer cooling conditions, the compressor discharges high-temperature and high-pressure refrigerant, and the refrigerant is condensed in the condenser to convert the high-temperature and high-pressure refrigerant into low-temperature and low-pressure refrigerant. , the released heat is directly discharged outdoors without being used, resulting in waste of this part of waste heat, which is not conducive to energy saving; in winter heating conditions, due to the low density of hot air blown by the indoor unit, it cannot reach people's feet and places close to the ground , causing the temperature near the feet of the human body to fail to meet the comfort requirements of the human body, that is, the temperature near the floor is low, which is not convenient for heating in winter.

Utility model content:

The technical problem to be solved by the utility model is to provide a DC frequency conversion multi-connection multifunctional air conditioner which can recover heat during cooling in summer and can increase the temperature near the ground during cooling in winter.

The technical solution of the utility model is to provide a DC frequency conversion multi-connection multifunctional air conditioner with the following structure, including a DC frequency conversion compressor, an oil-gas separator, a four-way valve, a condenser, a liquid storage device, an external gas-liquid separator and multiple A group of indoor expansion valves and indoor units connected in parallel.

The DC inverter air conditioner also includes a heat recovery device, a heat pump water heater and a floor heat radiation heating device; the heat recovery device includes a first water-refrigerant heat exchanger, a first hot water tank and a water pump, and the first A water-refrigerant heat exchanger is connected in parallel at both ends of the condenser, the water inlet and outlet of the first water-refrigerant heat exchanger are connected with the first hot water tank, and the water pump is arranged at the first water-refrigerant heat exchanger. The connecting pipe between the refrigerant heat exchanger and the first hot water tank; the connecting pipe near the four-way valve end of the first water-refrigerant heat exchanger is provided with a refrigerant flow regulating valve; the heat pump The water heater includes a fixed-frequency compressor, a second water-refrigerant heat exchanger, a throttling device, an evaporator and a gas-liquid separator II, and the discharge end of the fixed-frequency compressor is connected to the second water-refrigerant heat exchanger The second water-refrigerant heat exchanger communicates with the evaporator through a throttling device, and the evaporator is connected to the return air end of the compressor through the gas-liquid separator II; the second water- One end of the refrigerant heat exchanger is connected in series with the first water-refrigerant heat exchanger, and the other end communicates with the first hot water tank; the DC frequency conversion multi-connected multifunctional air conditioner also includes a floor heat radiation heating device, and the The radiant floor heating device includes a condensing coil, a second hot water tank and a hot water radiant circulation device, the condensing coil is connected in parallel with multiple indoor units, the condensing coil is located in the second hot water tank, and the condensing plate Electromagnetic valves are provided at both ends of the pipe, and the second hot water tank communicates with the hot water radiation circulation device.

After adopting the above structure, compared with the prior art, the utility model has the following advantages: adopting the structure of the utility model, a heat recovery device, a heat pump water heater and a floor heat radiation heating device are added, and the heat recovery device can To make the water in the first hot water tank reach the required temperature, there is no need to turn on the heat pump water heater; Water heating; when heating in winter, the heat recovery device cannot be used, and it is also necessary to turn on the heat pump water heater to heat the first hot water tank, so that the water in the first hot water tank meets the requirements of use. The water in the first hot water tank can be heated to the required water temperature, which is a good supplement to the heat recovery device; when the floor heat radiation heating device is turned on, the temperature of the ground can be increased through the radiant hot water pipe, thereby Improved heating effect.

As an improvement, the hot water radiation circulation device includes a water pump, a water separator, a radiant hot water pipe and a water collector, the water outlet of the second hot water tank is connected to the water pump, and the water pump communicates with the water separator, and the The water device is arranged at the water inlet of the radiant hot water pipe, and the water collector is arranged at the outlet of the radiant hot water pipe and communicated with the second hot water tank.

As an improvement, the refrigerant flow regulating valve is an electric three-way valve, and the electric three-way valve is respectively connected with the four-way valve, the first water-refrigerant heat exchanger and the condenser; The flow rate of the refrigerant entering the first water-refrigerant heat exchanger is more convenient to use.

As an improvement, both the first water-refrigerant heat exchanger and the second water-refrigerant heat exchanger are casing heat exchangers.

As an improvement, the throttling device is an expansion valve, so that the throttling effect is better.

Description of drawings:

The accompanying drawing is a schematic structural view of the DC inverter air conditioner of the present invention.

As shown in the figure: 1. DC inverter compressor, 2. Oil-gas separator, 3. Four-way valve, 4. Condenser, 5. Liquid receiver, 6. Stop valve I, 7. External gas-liquid separator, 8. Oil return capillary, 9. Indoor expansion valve, 10. Indoor unit, 11. Gas-liquid separator I, 12. Heating expansion valve, 13. The first water-refrigerant heat exchanger, 14. The first hot water tank , 15. Water pump, 16. Electric three-way valve, 17. One-way valve, 18. Shower nozzle, 19. Stop valve II, 20. Unloading solenoid valve, 21. Liquid bypass solenoid valve, 22. Fixed frequency compressor, 23. Second water-refrigerant heat exchanger, 24. Throttling device, 25. Evaporator, 26. Gas-liquid separator II, 27. Condensing coil, 28. Second hot water tank, 29. Solenoid valve, 30, water separator, 31, radiant hot water pipe, 32, water collector, 33, water filter.

Detailed ways:

Below in conjunction with accompanying drawing and specific embodiment the utility model is further described:

The DC frequency conversion air conditioner of the present utility model comprises a DC frequency conversion compressor 1 with a gas-liquid separator 111, an oil-gas separator 2, a four-way valve 3, a condenser 4, a liquid storage device 5, a shut-off valve 16, an external Gas-liquid separator 7, oil return capillary 8, indoor expansion valve 9, multiple indoor units 10 and connecting pipelines; the exhaust end of the DC inverter compressor 1 communicates with the inlet end of the oil-gas separator 2, and the oil and gas The oil return end of the separator 2 is communicated with the gas-liquid separator 111 carried by the compressor 1 through the oil return capillary 8, and the gas outlet end of the oil-gas separator 2 is connected with the four-way valve 3; The three ends are respectively connected with the external gas-liquid separator 7, the condenser 4, and the indoor unit 10, and the external gas-liquid separator 7 is connected with the gas-liquid separator 111, and the described condenser 4 passes through the liquid storage successively. 5, the indoor expansion valve 9 is connected with the indoor unit 10, the liquid reservoir 5 is connected with the external gas-liquid separator 7 through a capillary tube; the heating expansion valve is connected between the condenser 4 and the liquid reservoir 5 12.

The DC inverter air conditioner also includes a heat recovery device, the heat recovery device includes a first water-refrigerant heat exchanger 13, a first hot water tank 14 and a water pump 15, and the first water-refrigerant exchanger The heat exchanger 13 is connected in parallel to both ends of the condenser 4, the water inlet and outlet of the first water-refrigerant heat exchanger 13 are connected with the first hot water tank 14, and the water pump 15 is arranged at the first water-refrigerant heat exchanger. The connecting pipe between the medium heat exchanger 13 and the first hot water tank 14; the connecting pipe near the end of the four-way valve 3 of the first water-refrigerant heat exchanger 13 is provided with a refrigerant flow regulating valve.

The DC inverter air conditioner also includes a heat pump water heater, and the heat pump water heater includes a fixed frequency compressor 22, a second water-refrigerant heat exchanger 23, a throttling device 24, an evaporator 25, and a gas-liquid separator II 26. The exhaust end of the fixed-frequency compressor 22 communicates with the second water-refrigerant heat exchanger 23, and the second water-refrigerant heat exchanger 23 communicates with the evaporator 25 through the throttling device 24. The evaporator 25 is connected to the gas return end of the fixed frequency compressor 22 through the gas-liquid separator II 26; one end of the second water-refrigerant heat exchanger 23 is connected with the first water-refrigerant heat exchanger 13 in series The other end communicates with the first hot water tank 14.

The DC frequency conversion multi-functional air conditioner also includes a floor heat radiation heating device, and the floor heat radiation heating device includes a condensation coil 27, a second hot water tank 28 and a hot water radiation circulation device, and the condensation plate The pipe 27 is connected in parallel with multiple indoor units. The condensing coil 27 is located in the second hot water tank 28. The two ends of the condensing coil 27 are provided with electromagnetic valves 29. The second hot water tank 28 is connected to the hot water radiation cycle. The device is connected.

The hot water radiation circulation device includes a water pump, a water separator 30, a radiant hot water pipe 31 and a water collector 32. The water outlet of the second hot water tank 28 is connected to the water pump, and the water pump communicates with the water separator 30. , the water separator 30 is arranged at the water inlet of the radiant hot water pipe 31 , and the water collector 32 is arranged at the outlet of the radiant hot water pipe and communicates with the second hot water tank 28 .

The refrigerant flow regulating valve is an electric three-way valve 16, and the electric three-way valve 16 communicates with the four-way valve 3, the first water-refrigerant heat exchanger 13 and the condenser 4 respectively.

Both the first water-refrigerant heat exchanger 13 and the second water-refrigerant heat exchanger 23 are casing heat exchangers.

The throttling device 24 is an expansion valve.

The water outlet of the first hot water tank 14 is connected with the shower nozzle 18, so that the hot water in the first hot water tank 14 can be used for bathing.

A one-way valve 17 connected in parallel with the heating expansion valve 12 is provided between the condenser 4 and the liquid receiver 5, so that when the air conditioner is cooling, the heating expansion valve does not need to play a throttling role, and the refrigerant flows from the condenser And through the one-way valve to the liquid storage, the conduction direction of the one-way valve is from the condenser to the liquid storage; when the air conditioner is heating, the heating expansion valve acts as a throttle, and the refrigerant enters the heating expansion valve from the liquid storage (At this time, the direction of the refrigerant is the direction in which the one-way valve cuts off). Adding a one-way valve is more conducive to throttling control.

The working principle of the utility model: when the utility model is operated under cooling conditions in summer, the heat recovery device can make the water in the first hot water tank reach the required temperature, and there is no need to turn on the heat pump water heater. At this time, the DC frequency conversion compressor 1 The operating frequency is adjusted according to the required capacity of the indoor unit 10. The compressor exhaust and the oil mixture enter the oil-gas separator 2 for oil-gas separation. The separated lubricating oil enters the return air end of the DC inverter compressor 1 through the oil return capillary 8, and the remaining The lubricating oil passes through the electric three-way valve 16 along with the exhaust to adjust the flow rate of the refrigerant entering the condenser 4 and the first water-refrigerant heat exchanger 13, and the high-pressure and high-temperature refrigerant entering the first water-refrigerant heat exchanger 13 is discharged heat and heat the water in the first hot water tank 14, and the water pump drives the water in the first hot water tank 14 to circulate in the first water-refrigerant heat exchanger 13; the first water-refrigerant heat exchanger 13 The refrigerant after intermediate heat exchange merges with the refrigerant that enters the condenser 4 and is condensed and discharged, passes through the one-way valve 17 and the heating expansion valve (at this time, the expansion valve is fully open and does not have a throttling effect), and then enters the high-pressure liquid storage The condensate is distributed into the indoor unit 10 that needs to be operated, and the low-temperature and low-pressure refrigerant is generated by the indoor expansion valve 9 and exchanges heat with the indoor air. After that, the refrigerant enters the external gas-liquid separator through the four-way valve 3 7. Return to the gas-liquid separator I 11 of the compressor and the gas return end of the compressor 1, and so on.

During the cooling operation in summer, when the heat recovery device cannot make the water in the first hot water tank 14 reach the required temperature, the heat pump water heater is turned on to heat the water in the first hot water tank 14 at the same time. The working principle of the heat recovery device It has been described above, so I won’t repeat it here. At this time, the fixed-frequency compressor 22 of the heat pump water heater is turned on, and the high-temperature and high-pressure refrigerant enters the second water-refrigerant heat exchanger 23, and the water in the first hot water tank passes through the water pump. Circulating in the first water-refrigerant heat exchanger 13 and the second water-refrigerant heat exchanger 23, the refrigerant is throttled by the throttling device 24 after heat exchange, becomes a low-temperature and low-pressure refrigerant and enters the evaporator 25, and then Return to the gas return end of the fixed-frequency compressor through the gas-liquid separator II.

When heating in winter, the heat recovery device cannot be used, and it is necessary to turn on the heat pump water heater to heat the first hot water tank, so that the water in the first hot water tank meets the requirements of use, and the utility model is not affected by the operating conditions , can heat the water in the first hot water tank to the required water temperature, and play a very good supplementary role to the heat recovery device.

When the heating mode is running, the radiant floor heating device is running, the four-way valve 3 is energized to reversing, the solenoid valve 29 is energized to open, the compressor 1 adjusts the operating frequency according to the capacity required by the indoor unit 10, and the exhaust and compressor run out of oil. The mixture enters the oil and gas separator 2 for oil and gas separation, and the separated lubricating oil enters the return air end of the DC inverter compressor 1 through the oil return capillary 8, and the residual lubricating oil enters the second hot water through the four-way valve 3 and the solenoid valve 29 along with the exhaust gas The condensing coil 13 in the tank 28 condenses and releases heat, heats the water in the second hot water tank 28 to the required temperature, and the condensed refrigerant enters the liquid receiver 5 through the electromagnetic valve 29, and the condensate is passed through the heating expansion valve 12 The low-temperature and low-pressure refrigerant enters the condenser 4 for evaporation and heat exchange, and the evaporated refrigerant enters the external gas-liquid separator 7 through the four-way valve 3, and then returns to the compressor 1 with its own gas-liquid separator 11 And the return air pipe of compressor 1, the refrigerant returned to the return air end of the DC inverter compressor is compressed in the compressor, and then discharged from the compressor for the next cycle. At this time, the indoor unit 10 is also turned on to work normally; the water in the second hot water tank is driven into the radiant hot water pipe 31 through the water pump, and the radiant hot water pipe 31 radiates the heat of the hot water to the ground, thereby increasing the temperature near the ground, which helps Warm feet.

Claims (5)

1. A DC frequency conversion multi-connected multifunctional air conditioner, including a DC frequency conversion compressor (1), an oil-gas separator (2), a four-way valve (3), a condenser (4), and an external gas-liquid separator (7) And multiple sets of parallel indoor expansion valves (9) and indoor units (10), characterized in that: the DC inverter air conditioner also includes a heat recovery device, a heat pump water heater and a floor heat radiation heating device; the heat recovery device includes The first water-refrigerant heat exchanger (13), the first hot water tank (14) and the water pump (15), the first water-refrigerant heat exchanger (13) is connected in parallel to the condenser (4) The water inlet and outlet of the first water-refrigerant heat exchanger (13) communicate with the first hot water tank (14), and the water pump (15) is arranged at the first water-refrigerant heat exchange On the connecting pipe between the heat exchanger (13) and the first hot water tank (14); the connecting pipe near the four-way valve end of the first water-refrigerant heat exchanger (13) is provided with a refrigerant flow regulating valve ; The heat pump water heater includes a fixed-frequency compressor (22), a second water-refrigerant heat exchanger (23), a throttling device (24), an evaporator (25) and a gas-liquid separator II (26), the The discharge end of the fixed-frequency compressor (22) communicates with the second water-refrigerant heat exchanger (23), and the second water-refrigerant heat exchanger (23) passes through the throttling device (24) It is communicated with the evaporator (25), and the evaporator (25) is connected with the gas return end of the fixed-frequency compressor (22) through the gas-liquid separator II (26); the second water-refrigerant heat exchange One end of the device (23) is connected in series with the first water-refrigerant heat exchanger (13), and the other end communicates with the first hot water tank (14); the floor heat radiation heating device includes a condensing coil (27) , the second hot water tank (28) and the hot water radiation circulation device, the condensing coil (27) is connected in parallel with a plurality of indoor units (10), and the condensing coil (27) is located in the second hot water tank, Electromagnetic valves (29) are provided at both ends of the condensing coil (27), and the second hot water tank (28) communicates with the hot water radiation circulation device. 2. The DC frequency conversion multi-connected multifunctional air conditioner according to claim 1, characterized in that: the hot water radiation circulation device includes a water pump, a water separator (30), a radiant hot water pipe (31) and a water collector (32), the water outlet of the second hot water tank (28) is connected to the water pump, and the water pump is communicated with the water separator (30), and the water separator (30) is arranged at the water inlet of the radiant hot water pipe (31) , The water collector (32) is located at the outlet of the radiant hot water pipe (31) and communicates with the second hot water tank (28). 3. The DC frequency conversion multi-connected multifunctional air conditioner according to claim 1, characterized in that: the refrigerant flow regulating valve is an electric three-way valve (16), and the electric three-way valve (16) is connected with The four-way valve (3), the first water-refrigerant heat exchanger (13) and the condenser (4) are in communication. 4. The DC frequency conversion multi-connected multifunctional air conditioner according to claim 1, characterized in that: the first water-refrigerant heat exchanger (13) and the second water-refrigerant heat exchanger (23) are both For the tube heat exchanger. 5. The DC frequency conversion multi-connected multifunctional air conditioner according to claim 1, characterized in that: the throttling device (24) is an expansion valve.

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