CN201133692Y - Displacement ventilation and radiant cooling/heating compound air conditioning device based on evaporative cooling - Google Patents

Abstract

The evaporative cooling-based displacement ventilation and radiant cooling/heat composite air conditioning device disclosed in the utility model includes a cooling tower/indirect evaporative water chiller, a dual-system heat pump, a heat exchanger, an evaporative cooling fresh air unit and a radiation terminal device. The rooms are connected by a pipe network, and the flow direction is controlled by a tee. The composite air-conditioning device of the utility model adopts evaporative cooling technology to provide free cold fresh air and zero-cost high-temperature cold water for the air-conditioned room, so that the same radiation end can be used for heating in winter and cooling in summer, and one tube can be used for both purposes, reducing the initial investment of the system , overcome the phenomenon of condensation at the radiation end, greatly improve the indoor air quality, and have significant advantages in energy saving and emission reduction.

Description

Displacement ventilation and radiant cooling/heating compound air conditioning device based on evaporative cooling

technical field

The utility model belongs to the technical field of air-conditioning equipment, relates to a composite air-conditioning equipment, in particular to a composite air-conditioning device based on evaporative cooling for displacement ventilation and radiation cooling/heat supply.

Background technique

Although the current evaporative cooling technology has achieved certain results in its application, it is difficult to achieve room-by-room and time-sharing control. At the same time, radiant cooling is also affected by the air dew point of the air-conditioned room, which limits its cooling capacity. Furthermore, floor radiant heating has been widely used in my country at present, but the end of radiant heating can not be fully utilized in summer and is in a state of idle resources.

Contents of the invention

The purpose of this utility model is to provide a displacement ventilation and radiant cooling/heating compound air-conditioning device based on evaporative cooling, which uses evaporative cooling technology to realize "one pipe with dual functions" for heating in winter and cooling in summer at the radiation end, and improves the equipment utilization.

The technical scheme adopted by the utility model is that the displacement ventilation and radiation cooling/heating composite air-conditioning device based on evaporative cooling includes

Cooling tower/indirect evaporative water chiller, used to produce high-temperature cold water in summer, and send high-temperature cold water to the radiation terminal device through the water collector;

Dual-system heat pump, used to produce low-temperature cold water in summer and low-temperature hot water in winter, and send low-temperature cold water or low-temperature hot water to the radiation terminal device through the water collector;

The heat exchanger is connected between the cooling tower/indirect evaporative chiller and the dual-system heat pump for heat exchange between cold and hot water;

The evaporative cooling fresh air unit is used to connect to the high-temperature cold water produced by the cooling tower/indirect evaporative chiller, and to connect to the low-temperature cold water or low-temperature hot water produced by the dual-system heat pump; it is used to produce outdoor air into fresh air, And sent to the radiation terminal device through the displacement ventilator;

The radiation terminal device is installed in the room to be controlled, and is used to connect to the high-temperature cold water produced by the cooling tower/indirect evaporative chiller in summer or the low-temperature cold water produced by the dual-system heat pump, and to connect to the low-temperature water produced by the dual-system heat pump in winter Hot water; used to access the fresh air produced by the evaporative cooling fresh air unit.

The utility model is also characterized in that,

The evaporative cooling fresh air unit is a multi-stage evaporative cooling device. According to the air inlet direction, there are fresh air section, filter, indirect evaporative cooler, air cooling/heater, return air section, direct evaporative cooler, reheater and blower. The air cooling/heater is respectively connected to the cooling tower/indirect evaporative chiller and the dual-system heat pump through the pipe network, and the reheater is connected to the dual-system heat pump through the pipe network.

The radiant terminal device includes a radiant ceiling device and a radiant floor device. The radiant ceiling device is a capillary network radiant ceiling composed of multiple tubes, and the radiant floor device is surrounded by PEX cold/heat coils.

The replacement ventilator is a 1/4 cylindrical displacement ventilator.

The air conditioner of the present utility model has the following obvious advantages:

1. The same radiant terminal can be operated in winter and summer. It is used for heating in winter and cooling in summer, and adopts the combination of roof equipment and floor equipment to improve the cooling capacity of the radiation device.

2. The fresh air is obtained by evaporative cooling fresh air unit, and the combination of evaporative cooling and mechanical refrigeration technology expands its cooling capacity and has a significant energy-saving effect. Especially in summer in Northwest China, it can provide 100% dry fresh air for air-conditioned rooms, and the indoor air quality Excellent, and effectively avoid condensation on the surface of radiant cooling.

3. The evaporative cooling technology is used to provide free high-temperature cold water for the radiation end, which has good energy saving and emission reduction effects and low operating costs.

Description of drawings

Accompanying drawing is the structural representation of the utility model air conditioner.

In the figure, A. Evaporative cooling fresh air unit, 1. Cooling tower/indirect evaporative chiller, 2. Dual heat pump, 3. PEX radiant floor, 4. Capillary network radiant ceiling, 5. Displacement ventilator, 6. Air outlet , 7. Fresh air section, 8. Indirect evaporative cooler, 9. Air cooling/heater, 10. Direct evaporative cooler, 11. Water collector, 12. Filter, 13. Blower fan, 14. Return air section, 15 . Reheater, 16. Heat exchanger, 17. PEX cold/heat coil.

Detailed ways

The utility model will be described in detail below in conjunction with the accompanying drawings and specific embodiments.

The composite air conditioner of the present utility model, as shown in the accompanying drawings, includes a cooling tower/indirect evaporative chiller 1, a dual-system heat pump 2, a heat exchanger 16, an evaporative cooling fresh air unit A and a radiation terminal device, and each device is connected A loop is formed, and circulating water pumps, temperature control valves, pressure and temperature measuring devices, stop valves, three-way regulating valves, Y-type filters, etc. are installed to meet the needs of the normal operation of the water system.

The cooling tower/indirect evaporative water chiller 1 is used to produce high-temperature cold water in summer, and send the high-temperature cold water to the radiation terminal device of each room through the sub-collector 11.

The dual-system heat pump 2 is used to produce low-temperature cold water in summer and low-temperature hot water in winter, and sends the low-temperature cold water or low-temperature hot water to the radiation terminal device of each room through the water collector 11.

The heat exchanger 16 is connected between the cooling tower/indirect evaporative water chiller 1 and the dual-mode heat pump 2 for heat exchange between cold and hot water.

The evaporative cooling fresh air unit A is used to connect to the high-temperature cold water produced by the cooling tower/indirect evaporative chiller 1 and to connect to the low-temperature cold water or low-temperature hot water produced by the dual-system heat pump 2; it is used to produce outdoor air into fresh air , and sent to the radiation terminal device through the displacement ventilator 5.

Evaporative cooling fresh air unit A is provided with fresh air section 7, filter 12, indirect evaporative cooler 8, air cooling/heater 9, return air section 14, direct evaporative cooler 10, reheater 15 and blower 13 in sequence according to the air inlet direction . The air cooling/heater 9 is connected to the cooling tower/indirect evaporative water chiller 1 and the dual-system heat pump 2 respectively through a pipe network, and the reheater 15 is connected to the dual-system heat pump 2 through a pipe network. The evaporative cooling fresh air unit A adopts a multi-stage evaporative cooling device, the first stage is an indirect evaporative cooler 8, and the spray water is self-circulating, and the second stage is an air cooling/heater 9, which can be passed into a cooling tower/indirect evaporative cold water The high-temperature cold water of unit 1 can also be fed with low-temperature cold water and low-temperature hot water after heat exchange from the dual-system heat pump, and the third stage is a direct evaporative cooler.

The radiant terminal device is set in the room to be controlled. It is a dual-purpose type with floor and ceiling combined, including a radiant ceiling device and a radiant floor device. The radiant ceiling device is a capillary network composed of multiple tubes. The floor device is a PEX radiant floor 3 surrounded by PEX cold/heat coils 17 . It is used to connect the high-temperature cold water produced by the cooling tower/indirect evaporative chiller 1 or the low-temperature cold water produced by the dual-system heat pump 2 in summer, and the low-temperature hot water produced by the dual-system heat pump 2 in winter, and is also used to connect to evaporative cooling Fresh air produced by fresh air unit A.

The air conditioner of the utility model adopts the cooling tower/indirect evaporative chiller 1 to produce high-temperature cold water, and adopts a dual-system heat pump 2 device to obtain low-temperature cold water and low-temperature hot water. Cooling and heating use the same set of radiant terminal devices, which are connected to high-temperature cold water produced by cooling tower/indirect evaporative chiller 1 or low-temperature cold water produced by dual-system heat pump 2 in summer, and connected to low-temperature water produced by dual-system heat pump 2 in winter hot water. The fresh air is produced by the evaporative cooling fresh air unit A, and the outdoor fresh air passes through the filter 12, the indirect evaporative cooler 8, the air cooling/heater 9, the direct evaporative cooler 10 and the blower 13 in turn, and is arranged in the corner of the room through the air supply pipe The 1/4 cylindrical displacement ventilator 5 at the place is sent into the room, and after heat and moisture exchange, it is discharged to the outside by the louver air outlet 6 arranged near the top plate. The outdoor fresh air supply method adopts the displacement ventilation down-supply air supply method, forming an "air lake" on the floor surface.

The utility model is characterized in that the radiation cooling/heating adopts the same set of radiation terminal device, which is used for heating in winter and cooling in summer, adopts evaporative cooling technology to provide free cold fresh air and high-temperature cold water, and adopts displacement ventilation to supply air way for fresh air. It can not only realize room-by-room and time-sharing control, but also avoid condensation on the surface of radiant cooling.

The working process of the utility model air conditioner is:

During summer operation, it is realized by turning on different functional sections of the evaporative cooling fresh air unit A and adjusting the water temperature.

When the outdoor air state point falls on the left side of the indoor air state point, the indirect evaporative cooler 8, air cooler 9 and direct evaporative cooler 10 of the evaporative cooling fresh air unit A are turned on to make the outdoor air reach the air supply state point. At this time, adjust the three-way valves P7 and P8, and send the high-temperature cold water produced by the cooling tower/indirect evaporative chiller 1 to the air cooler 9 through the G1 and G2 pipes, and return along the G4 and G3 after absorbing heat, and at the same time the G5 and G6 pipe sections closure. When the load is large, adjust the three-way valves P7, P8 and cut-off valves P9, P10, and send the low-temperature cold water produced by the dual-system heat pump 2 through the heat exchanger 16 to the air cooler 9 through the G5 and G2 pipes. Return along the pipes G4, G6, while the pipe sections G1, G3, G7, and G8 are closed. For the radiant end, three-way valves P5, P6, P1, and P2 can be adjusted to send the high-temperature cold water produced by the cooling tower/indirect evaporative chiller 1 to the PEX radiant floor 3 and the capillary network radiant ceiling 4 through the G15, G17, and G21 pipes respectively. , and return along the pipes G22, G18, G16 after absorbing heat, while the pipe sections G13, G14, G19 and G20 are closed.

When the outdoor air state point falls on the right side of the indoor air state point, the indirect evaporative cooler 8 and air cooler 9 of the evaporative cooling fresh air unit A are turned on to make the outdoor air reach the air supply state point. At this time, adjust the three-way valves P7, P8 and the stop valves P9, P10, and send the low-temperature cold water produced by the dual-system heat pump 2 through the heat exchanger 16 to the air cooler 9 through the G5 and G2 pipes, and then follow the heat absorption along the pipes G4, G6 returns, while G1, G3, G7, G8 pipe sections are closed. For the radiation end, the three-way valves P5, P6, P1 and P2 can be adjusted to mix the high-temperature cold water produced by the cooling tower/indirect evaporative water chiller 2 with the low-temperature cold water produced by the dual-system heat pump 2 through the heat exchanger 16. The high-temperature cold water with a good ratio is sent to the PEX radiant floor 3 and the capillary network radiant ceiling 4 through the G15, G17, and G21 pipes respectively, and returns along the pipes G22, G18, G16, and G20 after absorbing heat, and the pipe sections G13 and G14 are closed at the same time.

During winter operation, the air heater 9, direct evaporative cooler 10, and reheater 15 of the evaporative cooling fresh air unit A are turned on, and at the same time, part of the waste heat is recovered by the return air section 14, so that the outdoor air reaches the air supply state. At this time, adjust the three-way valves P7, P8 and the cut-off valves P9, P10, and send the low-temperature hot water produced by the dual-system heat pump 2 through the heat exchanger 16 to the air heater 9 through the pipes G5 and G2, and then follow the pipe G4 after releasing heat. , G6 returns, at this time the G1, G3 pipe sections are closed. At the same time, the low-temperature hot water produced by the dual-system heat pump 2 is sent to the reheater 15 through the G7 pipe, and returns along the pipe G8 after releasing heat. For the radiant end, the three-way valves P3, P4, P1, and P2 can be adjusted to send the high-temperature cold water produced by the dual-system heat pump 2 to the PEX radiant floor 3 and the capillary network radiant ceiling 4 through the G12, G13, and G21 pipes respectively to release heat. Back along the pipe G22, G14, G10 return, while G9, G11, G17, G18 pipe section closed.

When the transition season runs,

When the outdoor air state point falls to the left of the indoor air state point, the indirect evaporative cooler 8 or air cooler 9 of the evaporative cooling fresh air unit A is turned on. If the air cooler 9 is turned on, the three-way valves P7 and P8 need to be adjusted, and the high-temperature cold water produced by the cooling tower/indirect evaporative water chiller 1 is sent to the air cooler 9 through the G1 and G2 pipes, and the heat is absorbed along the G4 and G3 Return, while the G5 and G6 pipe sections are closed. For the water supply and return mode at the radiation end, it is the same as when the outdoor air state point falls on the left side of the indoor air state point during summer operation.

When the outdoor air state point falls on the right side of the indoor air state point, the air cooler 9 is opened to make the outdoor air reach the air supply state point. At this time, adjust the three-way valves P7, P8 and the stop valves P9, P10, and send the low-temperature cold water produced by the dual-system heat pump 2 through the heat exchanger 16 to the air cooler 9 through the G5 and G2 pipes, and then follow the heat absorption along the pipes G4, G6 returns, while G1, G3, G7, G8 pipe sections are closed. For the radiation end, the three-way valves P5, P6, P1, and P2 can be adjusted to send the high-temperature cold water produced by the cooling tower/indirect evaporative chiller 1 to the PEX radiation floor 3 and the capillary network radiation ceiling through the G15, G17, and G21 pipes respectively. 4. Return along the pipes G22, G18, and G16 after absorbing heat, and at the same time, the pipe sections of G13, G14, G19, and G20 are closed.

Claims (4)

1. A displacement ventilation and radiant cooling/heating composite air conditioner based on evaporative cooling, characterized in that it comprises Cooling tower/indirect evaporative water chiller (1), used to produce high-temperature cold water in summer, and send the high-temperature cold water to the radiation terminal device through the manifold (11); The dual-system heat pump (2) is used to produce low-temperature cold water in summer and low-temperature hot water in winter, and sends the low-temperature cold water or low-temperature hot water to the radiation terminal device through the water collector (11); A heat exchanger (16), connected between the cooling tower/indirect evaporative water chiller (1) and the dual-system heat pump (2), for heat exchange between cold and hot water; The evaporative cooling fresh air unit (A) is used to connect to the high-temperature cold water produced by the cooling tower/indirect evaporative water chiller (1), and to connect to the low-temperature cold water or low-temperature hot water produced by the dual-system heat pump (2); To prepare outdoor air into fresh air, and send it to the radiation terminal device through the displacement ventilator (5); The radiation terminal device is installed in the room to be controlled, and is used to connect to the high-temperature cold water produced by the cooling tower/indirect evaporative chiller (1) or the low-temperature cold water produced by the dual-system heat pump (2) in summer, and to connect to the dual-system cooling water in winter. The low-temperature hot water produced by the standard heat pump (2); used to connect to the fresh air produced by the evaporative cooling fresh air unit (A). 2. The air conditioner according to claim 1, characterized in that, the evaporative cooling fresh air unit (A) is a multi-stage evaporative cooling device, and a fresh air section (7), a filter (12) are arranged in sequence according to the air inlet direction ), indirect evaporative cooler (8), air cooling/heater (9), return air section (14), direct evaporative cooler (10), reheater (15) and blower (13), the air The cooling/heater (9) is connected to the cooling tower/indirect evaporative chiller (1) and the dual-system heat pump (2) respectively through the pipe network, and the reheater (15) is connected to the dual-system heat pump (2) through the pipe network ) are connected. 3. The air conditioning device according to claim 1, characterized in that, the radiant terminal device includes a radiant ceiling device and a radiant floor device, and the radiant ceiling device is a capillary network radiant ceiling (4) composed of a plurality of pipes , the radiant floor device is surrounded by PEX cold/heat coils (17). 4. The air conditioner according to claim 1, characterized in that, the displacement ventilator (5) is a 1/4 cylindrical displacement ventilator.

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