CN109855212B - Air conditioner for gradient utilization of cold energy - Google Patents
Air conditioner for gradient utilization of cold energy Download PDFInfo
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- CN109855212B CN109855212B CN201811006332.5A CN201811006332A CN109855212B CN 109855212 B CN109855212 B CN 109855212B CN 201811006332 A CN201811006332 A CN 201811006332A CN 109855212 B CN109855212 B CN 109855212B
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- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 333
- 230000006835 compression Effects 0.000 claims abstract description 104
- 238000007906 compression Methods 0.000 claims abstract description 104
- 239000000498 cooling water Substances 0.000 claims abstract description 99
- 238000001816 cooling Methods 0.000 claims abstract description 71
- 238000004378 air conditioning Methods 0.000 claims abstract description 19
- 238000005507 spraying Methods 0.000 claims abstract description 9
- 239000000945 filler Substances 0.000 claims description 3
- 239000007921 spray Substances 0.000 claims description 3
- 239000002699 waste material Substances 0.000 abstract description 5
- 238000007710 freezing Methods 0.000 abstract 2
- 230000008014 freezing Effects 0.000 abstract 2
- 238000010586 diagram Methods 0.000 description 15
- 238000005057 refrigeration Methods 0.000 description 10
- 238000005516 engineering process Methods 0.000 description 7
- 238000001704 evaporation Methods 0.000 description 6
- 230000008020 evaporation Effects 0.000 description 6
- 238000004134 energy conservation Methods 0.000 description 3
- 238000010438 heat treatment Methods 0.000 description 3
- 238000004891 communication Methods 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 238000004064 recycling Methods 0.000 description 1
- 238000009423 ventilation Methods 0.000 description 1
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Abstract
The invention discloses an air conditioner capable of utilizing cold energy in a gradient way, wherein water outlet of a water tank is connected with a primary side of a first plate heat exchanger, a primary side of a second plate heat exchanger, a first surface cooler and a cooling water side of a first mechanical compression type water chilling unit, cooling water outlet of the first mechanical compression type water chilling unit is connected with a spraying device, water outlet of a first user is sequentially connected with a secondary side of the first plate heat exchanger and a freezing water side of the first mechanical compression type water chilling unit, a second user is arranged on the secondary side of the second plate heat exchanger, or a first user is arranged on the secondary side of the first plate heat exchanger, and a third user is arranged on the freezing water side of the first mechanical compression type water chilling unit. The invention has reasonable structure, full cold energy utilization, no cold energy waste, obvious energy saving advantage, and can avoid the potential safety hazard of blockage of the coil pipe of the user caused by low water quality of the evaporative cooling cold water supply device, thereby effectively guaranteeing the air conditioning performance of the user.
Description
Technical Field
The invention belongs to an air treatment device in the field of heating ventilation and air conditioning, and particularly relates to an air conditioning device for gradient utilization of cold energy.
Background
With the gradual maturity of the water evaporation refrigeration technology, the evaporation refrigeration technology has a more mature use method in an air conditioning refrigeration system in a dry area, and the dry air energy evaporation refrigeration technology has huge energy saving and environmental protection advantages, so that the maximum utilization of the dry air energy refrigeration in the air conditioning system is beneficial to energy saving of buildings. According to research, in some semi-dry areas, the air-conditioning system can be used for cooling in different time areas of a year, and can directly utilize dry air energy for cooling, but only dry air energy for evaporation cooling can not meet the requirement of the air-conditioning system in a certain time period, so that the air-conditioning system combining the evaporation cooling technology with the traditional mechanical cooling is in one research direction; the two methods are more, but different combining modes have advantages and disadvantages, and the energy saving advantage is not obvious or the initial investment is larger although the energy saving is possible compared with the mechanical refrigeration only.
The performance of the evaporative cooling water chilling unit changes along with the temperature of the outdoor air wet bulb entering the evaporative cooling water chilling unit, the outlet water temperature of the evaporative cooling water chilling unit is generally lower in dry and hot areas, but when the evaporative cooling water chilling unit is directly used as cold water for a user, the temperature is higher, the return water temperature of the cooling water is still lower after the cooling water is used as cooling water to release cold energy according to the temperature difference of 5 ℃, if the cooling water returns to the evaporative cooling water chilling unit for continuous circulation cooling, the cold energy release of the cooling water is insufficient, the cold energy waste is inevitably caused, the heat exchange efficiency of the evaporative cooling water chilling unit is reduced, the outlet water temperatures of different types of the evaporative cooling water chilling units (such as a cooling tower and an indirect evaporative water chilling unit) are different, the outlet water temperature of the traditional mechanical refrigeration water chilling unit is generally lower than the outlet water temperature of the evaporative cooling water chilling unit, and the circulating water flow of the evaporative cooling water chilling unit and the cold water prepared by the mechanical refrigeration water chilling unit and the evaporative cooling water chilling unit are reasonably utilized, so that the requirements of full energy conservation and safe use of an air conditioning system can be met.
Disclosure of Invention
The invention aims to provide an air conditioner capable of utilizing cold energy in a gradient way, which has the advantages of reasonable structure, full cold energy utilization, avoiding cold energy waste, obvious energy saving advantage, avoiding the potential safety hazard of blockage of a user coil caused by low water quality of an evaporative cooling cold water device and effectively guaranteeing the air conditioning performance of a user.
The purpose of the invention is realized in the following way: the air conditioner comprises an evaporative cooling water chiller, a water tank, an air inlet, a filler, a spraying device and an exhaust fan are sequentially arranged in a case of the evaporative cooling water chiller from bottom to top, a first surface cooler is arranged on the air inlet, a water outlet pipe of the water tank is connected with an inlet pipe of a primary side of a first plate heat exchanger through a first circulating pump, an outlet pipe of the primary side of the water tank is connected with an inlet pipe of a primary side of a second plate heat exchanger, an outlet pipe of the primary side of the water tank is connected with an inlet pipe of the first surface cooler, an outlet pipe of the first surface cooler is connected with a cooling water inlet pipe of a first mechanical compression water chiller, a cooling water outlet pipe of the second side of the first plate heat exchanger is connected with a cooling water inlet pipe of the first mechanical compression water chiller through a second circulating pump, an outlet pipe of the first user is connected with an inlet pipe of a secondary side of the first plate heat exchanger, an outlet pipe of the second plate heat exchanger is connected with an inlet pipe of the second user through a third circulating pump, and an outlet pipe of the second plate heat exchanger is connected with an inlet pipe of the second user; or the outlet pipe of the secondary side of the first plate heat exchanger is connected with the inlet pipe of the secondary side of the first plate heat exchanger through the second circulating pump and the first user, and the chilled water outlet pipe of the first mechanical compression type water chilling unit is connected with the chilled water inlet pipe of the first mechanical compression type water chilling unit through the fourth circulating pump and the third user.
According to the invention, the first plate heat exchanger is used for cooling a first user, namely, indoor high Wen Moduan is used for carrying out first heat exchange, the cold water with the temperature increased is used for the second plate heat exchanger and is used for cooling a second user, namely, the fresh air unit is used for carrying out second heat exchange, the cold water with the temperature increased for two times is used as cooling water for the mechanical compression type water chilling unit, the mechanical compression type water chilling unit is used for preparing cold water for a third user of an air conditioning system, namely, the low-temperature tail end, the first user and the second user are both in closed operation, the system regulation is good, and the safety is high. According to the requirement, the cold water after heat exchange of the first user can be precooled on the secondary side of the first plate heat exchanger, then enters the chilled water side of the mechanical compression type water chilling unit for further cooling, and the temperature of the cold water of the first user is lower. According to the requirements, the primary side outlet water of the first plate heat exchanger can fully or partially enter the second plate heat exchanger, so that the configuration of the second plate heat exchanger is reduced, meanwhile, the cold water subjected to heat exchange by the first plate heat exchanger or the second plate heat exchanger fully or partially enters the surface cooler for evaporative cooling and cold water supply to precool fresh air, the outlet water temperature of the evaporative cooling cold water device is lower, the configuration of the evaporative cooling cold water device is reduced, the water quantity for users is larger, and the system economy is higher.
The advantages are that:
1. The cold energy of the evaporative cooling cold water device is fully utilized, so that the cold energy waste is avoided, and the energy-saving advantage is obvious;
2. The evaporative cooling technology and the mechanical refrigeration technology are combined to cool an air conditioner user, so that the air conditioner performance of the user is effectively ensured;
3. The user side cold water system can realize closed operation, so that the potential safety hazard of blockage of a user coil caused by low water quality of the evaporative cooling cold water device is avoided, and meanwhile, a heat source can be arranged at the user side, thereby being convenient for a user to heat in winter;
4. The evaporative cooling cold water device provides high-temperature cold water for users; the mechanical compression type refrigerating unit provides low-temperature cold water for the tail end, realizes a heat exchange mode of 'high temperature to high temperature and low temperature to low temperature', reduces the structural size of a tail end heat exchange device, has large refrigerating capacity and obvious energy conservation;
5. the high-temperature cold water prepared by the evaporative cooling cold water device can pre-cool backwater of a user, and can meet the refrigeration of an indoor air conditioner only by means of an evaporative cooling technology under partial weather conditions, so that the configuration of a mechanical compression type cold water unit is reduced, and the energy conservation is obvious;
6. the cold water after heat exchange of the user can be used for precooling outdoor fresh air by the surface cooler of the evaporative cooling cold water device, the configuration of the integral evaporative cooling cold water device is reduced, and the user water quantity is larger.
The invention has reasonable structure, full cold energy utilization, avoiding cold energy waste, obvious energy saving advantage, avoiding the potential safety hazard of blockage of the coil pipe of the user caused by low water quality of the evaporative cooling cold water device, and effectively ensuring the air conditioning performance of the user.
Drawings
In the following, the present invention will be further described with reference to the accompanying drawings, in which fig. 1 is a schematic structural diagram of embodiment 1 of the present invention, fig. 2 is a schematic structural diagram of embodiment 2 of the present invention, fig. 3 is a schematic structural diagram of embodiment 3 of the present invention, fig. 4 is a schematic structural diagram of embodiment 4 of the present invention, fig. 5 is a schematic structural diagram of embodiment 5 of the present invention, fig. 6 is a schematic structural diagram of embodiment 6 of the present invention, fig. 7 is a schematic structural diagram of embodiment 7 of the present invention, fig. 8 is a schematic structural diagram of embodiment 8 of the present invention, fig. 9 is a schematic structural diagram of embodiment 9 of the present invention, fig. 10 is a schematic structural diagram of embodiment 10 of the present invention, fig. 11 is a schematic structural diagram of embodiment 11 of the present invention, fig. 12 is a schematic structural diagram of embodiment 12 of the present invention, fig. 13 is a schematic structural diagram of embodiment 14 of the present invention, fig. 15 is a schematic structural diagram of the embodiment 15 of the present invention, and fig. 16 is a schematic structural diagram of the embodiment 16 of the present invention.
Detailed Description
An air conditioner for cascade utilization of cold energy, as shown in figures 1 and 2, comprises an evaporative cooling cold water device, a water tank 1, an air inlet, a filler 3, a spraying device 4 and an exhaust fan 5 are sequentially arranged in a machine case of the evaporative cooling cold water device from bottom to top, a first surface cooler 2 is arranged on the air inlet, an outlet pipe of the water tank 1 is connected with an inlet pipe of a primary side of a first plate heat exchanger 7 through a first circulating pump 6, an outlet pipe of the primary side of the water tank is connected with an inlet pipe of a primary side of a second plate heat exchanger 12, an outlet pipe of the primary side of the water tank is connected with an inlet pipe of the first surface cooler 2, an outlet pipe of the first surface cooler 2 is connected with a cooling water inlet pipe of a first mechanical compression cold water unit 13, a cooling water outlet pipe of the first mechanical compression cold water unit 13 is connected with the spraying device 4, a secondary outlet pipe of the first plate heat exchanger 7 is connected with a chilled water inlet pipe of the first mechanical compression cold water unit 13 through a second circulating pump 9, the chilled water outlet pipe of the first mechanical compression type water chiller 13 is connected with the inlet pipe of the first user 8, the outlet pipe of the first user 8 is connected with the inlet pipe of the second side of the first plate heat exchanger 7, the outlet pipe of the second side of the second plate heat exchanger 12 is connected with the inlet pipe of the second user 10 through the third circulating pump 11, the outlet pipe of the second user 10 is connected with the inlet pipe of the second side of the second plate heat exchanger 12, or the outlet pipe of the second side of the first plate heat exchanger 7 is connected with the inlet pipe of the second side of the first plate heat exchanger 7 through the second circulating pump 9 and the first user 8, and the chilled water outlet pipe of the first mechanical compression type water chiller 13 is connected with the chilled water inlet pipe of the first mechanical compression type water chiller 13 through the fourth circulating pump 14 and the third user 15. As shown in fig. 1, the primary side outlet water of the first plate heat exchanger 7 enters the primary side of the second plate heat exchanger 12 to provide cold water for the second user 10 of the air conditioner on the secondary side of the second plate heat exchanger 12, the outlet water of the primary side of the second plate heat exchanger 12 passes through the first surface cooler 2 of the evaporative cooling cold water device and is used for precooling outdoor fresh air entering the evaporative cooling cold water device, the outlet water of the first surface cooler 2 is used as cooling water to enter the cooling water side of the first mechanical compression cold water unit 13, and the cooling water outlet water of the first mechanical compression cold water unit 13 returns to the evaporative cooling cold water device to cool down circularly. The secondary side outlet water of the first plate heat exchanger 7 enters the first mechanical compression type water chilling unit 13 as chilled water under the action of the second circulating pump 9, the chilled water is further cooled and then is used for refrigerating the first user 8 of the air conditioner, the outlet water of the first user 8 returns to the secondary side return water of the first plate heat exchanger 7, and the primary side of the first plate heat exchanger 7 is used for cooling the cold water precooling of the cold water device by evaporation. The first user 8 may be an indoor unit Wen Moduan, the second user 10 may be a fresh air unit, as shown in fig. 2, primary side effluent of the first plate heat exchanger 7 enters the primary side of the second plate heat exchanger 12, cold water is provided for the second user 10 of the air conditioner on the secondary side of the second plate heat exchanger 12, the primary side effluent of the first plate heat exchanger 7 enters the primary side of the second plate heat exchanger 12, primary side effluent of the second plate heat exchanger 12 enters the first mechanical compression type water chilling unit 13 as cooling water, and cooling water effluent of the first mechanical compression type water chilling unit 13 returns to the evaporative cooling water chilling unit for cooling circularly. The second side of the first plate heat exchanger 7 is provided with an air conditioner first user 8, the second side of the second plate heat exchanger 12 is provided with an air conditioner second user 10, the chilled water side of the first mechanical compression type water chilling unit 13 is provided with an air conditioner third user 15, the first user 8 can be an indoor height Wen Moduan, the second user 10 can be a fresh air unit, and the third user 15 can be an indoor low-temperature tail end. In the system flow, the secondary side of the first plate heat exchanger 7 and chilled water side cold water of the first mechanical compression type water chilling unit 13 are connected in parallel, the adjustability of the first user 8 and the third user 15 is more convenient, and water quantity entering the primary side of the second plate heat exchanger 12 can be adjusted through a bypass pipe and a valve according to requirements, so that the configuration of the second plate heat exchanger 12 is reduced.
As shown in fig. 3, the outlet pipe of the primary side of the first plate heat exchanger 7 is connected with the inlet pipe of the first surface cooler 2, the outlet pipe of the first surface cooler 2 is connected with the inlet pipe of the primary side of the second plate heat exchanger 12, the outlet pipe of the primary side of the second plate heat exchanger 12 is connected with the cooling water inlet pipe of the first mechanical compression type water chilling unit 13, and the cooling water outlet pipe of the first mechanical compression type water chilling unit 13 is connected with the spraying device 4. The primary side outlet water of the first plate heat exchanger 7 enters the first surface cooler 2 of the evaporative cooling water chilling unit and is used for precooling outdoor fresh air entering the evaporative cooling water chilling unit, the outlet water of the first surface cooler 2 enters the primary side of the second plate heat exchanger 12, the secondary side cold water of the second plate heat exchanger 12 is used for refrigerating the air conditioner second user 10, the primary side outlet water of the second plate heat exchanger 12 enters the first mechanical compression water chilling unit 13 as cooling water, and the cooling water outlet water of the first mechanical compression water chilling unit 13 returns to the evaporative cooling water chilling unit for circulating cooling. The return water at the primary side of the first plate heat exchanger 7 is used for precooling fresh air by the first surface cooler 2, the water temperature passing through the first surface cooler 2 is lower, and the water outlet temperature of the evaporative cooling water chilling device is lower.
As shown in fig. 4, two groups of first and second surface coolers 2 and 16 connected in series are arranged on an air inlet of the evaporative cooling cold water device, a primary side outlet pipe of the first plate heat exchanger 7 is connected with an inlet pipe of the first surface cooler 2, a bypass is further arranged on a primary side outlet pipe of the first plate heat exchanger 7, the bypass is connected with an inlet pipe of a primary side of the second plate heat exchanger 12 through a valve 17, an outlet pipe of the primary side of the second plate heat exchanger 12 is connected with an inlet pipe of the second surface cooler 16, and outlet pipes of the first and second surface coolers 2 and 16 are connected with a cooling water inlet pipe of the first mechanical compression cold water unit 13. The air inlet of the evaporative cooling cold water device is provided with a first surface cooler 2 and a second surface cooler 16, cold water prepared by the evaporative cooling cold water device enters the primary side of the first plate heat exchanger 7 through the first circulating pump 6, a part of backwater of the primary side of the first plate heat exchanger 7 passes through the primary side of the second plate heat exchanger 12, a part of backwater of the primary side of the second plate heat exchanger 12 passes through the first surface cooler 2 of the evaporative cooling cold water device, backwater of the primary side of the second plate heat exchanger 12 passes through the second surface cooler 16 of the evaporative cooling cold water device, water discharged from the first surface cooler 2 and the second surface cooler 16 is used as cooling water to enter the first mechanical compression cold water unit 13, cooling water with increased temperature returns to the evaporative cooling cold water device for circulating cooling, dry hot air with higher outdoor temperature passes through the first surface cooler 2 and the second surface cooler 16 for step-by-step cooling, the water discharged temperature of the evaporative cooling cold water device is lower, the backwater of the first user 8 of the secondary side of the first plate heat exchanger 7 is pre-cooled by the cold water of the primary side, and the backwater of the second plate heat exchanger 12 enters the water side of the first mechanical compression cold water unit 13 through the second circulating pump 9 for further cooling the water side of the first user 8 for cooling the second user 8, and the second user cooling the second user 10 is used for cooling the second user 10.
As shown in fig. 5, the outlet pipe of the primary side of the first plate heat exchanger 7 is provided with a bypass, the bypass is connected with the inlet pipe of the primary side of the second plate heat exchanger 12 through a valve 17, the outlet pipe of the first surface cooler 2 is connected with the cooling water inlet pipe of the first mechanical compression type water chilling unit 13, the outlet pipe of the primary side of the second plate heat exchanger 12 is communicated with the outlet pipe of the first surface cooler 2, the outlet pipe of the secondary side of the first plate heat exchanger 7 is communicated with the chilled water inlet pipe of the first mechanical compression type water chilling unit 13, and the chilled water outlet pipe of the first mechanical compression type water chilling unit 13 is communicated with the water inlet pipe of the first user. Part of the primary side water of the first plate heat exchanger 7 enters the first surface cooler 2 of the evaporative cooling cold water device and is used for precooling outdoor fresh air entering the evaporative cooling cold water device, and the other part of the primary side water of the first plate heat exchanger 7 enters the primary side of the second plate heat exchanger 12 and enters the first mechanical compression type water chilling unit 13 as cooling water after being mixed with the water discharged from the first surface cooler 2, and the cooling water discharged from the first mechanical compression type water chilling unit 13 returns to the evaporative cooling cold water device to be cooled circularly. The water quantity for the second user 10 in the system flow is reduced, the configuration of the second plate heat exchanger 12 is reduced, the economy is better, meanwhile, the water temperature entering the first surface cooler 2 is lower, the water outlet temperature of the evaporative cooling cold water device is lower, and a valve 17 can be arranged on the primary side water inlet pipeline of the second plate heat exchanger 12 to adjust the water quantity according to requirements.
As shown in fig. 6, the outlet pipe of the primary side of the first plate heat exchanger 7 is connected to the inlet pipe of the primary side of the second plate heat exchanger 12 through a three-way joint and a valve 17, the outlet pipe of the primary side of the second plate heat exchanger 12 is connected to the inlet pipe of the first surface cooler 2, and the other interface of the three-way joint is connected to the outlet pipe of the primary side of the second plate heat exchanger 12. Part of the water discharged from the first plate heat exchanger 7 enters the primary side of the second plate heat exchanger 12, after the water discharged from the primary side of the second plate heat exchanger 12 is mixed with part of the water discharged from the primary side of the first plate heat exchanger 7, the water discharged from the first surface cooler 2 enters the first mechanical compression type water chilling unit 13 as cooling water after the outdoor fresh air is precooled by the first surface cooler 2 of the evaporative cooling water chilling unit, and the cooling water discharged from the first mechanical compression type water chilling unit 13 returns to the evaporative cooling water chilling unit for circulating cooling. In this way, the required water amount for the second user 10 is smaller, the configuration of the second plate heat exchanger 12 is reduced, the economy is better, meanwhile, the amount of cold water entering the first surface cooler 2 is larger, the better pre-cooling outdoor fresh air of the first surface cooler 2 is facilitated, and a valve 17 can be arranged on the primary side water inlet pipeline of the second plate heat exchanger 12 to adjust the water amount according to the requirement.
As shown in fig. 7, valves 17 are respectively arranged on the connection pipes at the secondary side of the first plate heat exchanger 7, the secondary side of the second plate heat exchanger 12 and the outlet, and on the connection pipes at the chilled water inlet and outlet of the first mechanical compression type water chiller 13, the pipeline between the first user 8 and the secondary side inlet valve 17 of the first plate heat exchanger 7 is communicated with the pipeline between the secondary side outlet valve 17 of the first plate heat exchanger 7 and the second circulating pump 9 through communication pipes, the valves 17 are arranged on the communication pipes, a water supply bypass and a water return bypass are respectively arranged on the pipeline between the secondary side outlet valve 17 of the second plate heat exchanger 12 and the third circulating pump 11 and the pipeline between the secondary side inlet valve 17 of the second plate heat exchanger 12 and the second user 10, wherein the water supply bypass is connected with the secondary side outlet of the third plate heat exchanger 18 through the first end valve 17 and the tail end valve 17, the water return bypass is connected with the secondary side inlet pipe of the third plate heat exchanger 18 through the first end valve 17 and the tail end valve 17, and the primary side heat supply bypass is respectively connected with the hot water return pipe and the hot water return pipe. The hot water plate exchange is added, the water inlet and outlet ports of the first user 8 and the second user 10 are connected with hot water pipes, so that winter heating of the first user 8 and the second user 10 is realized, the valves 17 on the secondary sides of the first plate heat exchanger 7 and the second plate heat exchanger 12 are closed during heating, the valve 17 on the chilled water side of the mechanical compression chiller 13 is closed, and the valve 17 on the secondary side of the hot water plate exchange and the valve 17 between the water outlet side of the first user 8 and the second circulating pump 9 are opened.
As shown in fig. 8, the evaporative cooling water chiller is arranged on a roof 20, outlet pipes of the secondary side of the first plate heat exchanger 7 are connected with chilled water inlet pipes of the first mechanical compression water chiller 13 through the second circulating pump 9, the chilled water outlet pipes of the first mechanical compression water chiller 13 are connected with inlets of more than two first users 8 which are uniformly distributed and connected in parallel, the outlet pipes of the first users 8 which are uniformly distributed and connected in parallel are connected with inlet pipes of the secondary side of the first plate heat exchanger 7, outlet pipes of the secondary side of the second plate heat exchanger 12 are connected with inlets of more than two second users 10 which are uniformly distributed and connected in parallel through the third circulating pump 11, the outlet pipes of the second users 10 which are uniformly distributed and connected in parallel are connected with inlet pipes of the secondary side of the second plate heat exchanger 12, drain pipes are arranged on water supply pipes of the water tank 1, the water inlet pipes and the outlet pipes of the first surface coolers 2 and the water supply pipes of the spraying device 4, and drain valves 19 are arranged on the drain pipes. The evaporative cooling water chilling unit is arranged on a roof 20, the first plate heat exchanger 7 and the second plate heat exchanger 12 are arranged between a basement or air conditioning equipment, cold water prepared by the evaporative cooling water chilling unit is supplied to the primary side of the first plate heat exchanger 7 of the basement through a vertical pipe, primary side backwater of the first plate heat exchanger 7 enters the primary side of the second plate heat exchanger 12, primary side effluent of the second plate heat exchanger 12 enters the first surface cooler 2 of the evaporative cooling water chilling unit of the roof 20 through the vertical pipe, effluent of the first surface cooler 2 is supplied to the first mechanical compression type water chilling unit 13 arranged in the basement through the vertical pipe as cooling water, cooling water effluent of the first mechanical compression type water chilling unit 13 returns to the evaporative cooling water chilling unit through the vertical pipe for circulating cooling, effluent of the first user 8 returns to secondary side backwater of the first plate heat exchanger 7 through the vertical pipe, the high-temperature cold water prepared by the evaporative cooling cold water device is precooled firstly, the temperature is reduced and then is further cooled by the first mechanical compression type cold water unit 13 and then is used for refrigerating the first user 8 of the air conditioner, the first user 8 can be indoor high Wen Moduan, the effluent of the second user 10 returns to the secondary side backwater of the second plate heat exchanger 12 through the vertical pipe and is cooled by the high-temperature cold water heated by the primary side of the second plate heat exchanger 12, the second user 10 can be a fresh air unit, a drain pipe is arranged at the lowest point of a pipeline of the roof 20 or at the top layer of an air conditioning area, and the drain pipe is provided with a drain valve 19, so that the cold water in the evaporative cooling cold water device can be emptied conveniently when cooling is not needed in winter, and the pipeline is ensured not to be frozen.
As shown in fig. 9, a bypass is provided in the outlet pipe of the primary side of the first plate heat exchanger 7, the bypass is connected to the inlet of the primary side of the second plate heat exchanger 12 via a valve 17, and the outlet pipe of the primary side of the second plate heat exchanger 12 is connected to the outlet pipe of the first surface cooler 2. Part of the outlet water of the first plate heat exchanger 7 enters the first surface cooler 2 of the evaporative cooling water chilling device and is used for precooling outdoor fresh air entering the evaporative cooling water chilling device, and the other part of the outlet water enters the primary side of the second plate heat exchanger 12, after being mixed with the outlet water of the first surface cooler 2, the outlet water of the primary side of the second plate heat exchanger 12 enters the first mechanical compression water chilling unit 13 as cooling water, and the cooling water outlet water of the first mechanical compression water chilling unit 13 returns to the evaporative cooling water chilling device to cool down circularly. The second side of the first plate heat exchanger 7 is provided with the first user 8 of the air conditioner, the second side of the second plate heat exchanger 12 is provided with the second user 10 of the air conditioner, the chilled water side of the first mechanical compression type water chilling unit 13 is provided with the third user 15 of the air conditioner, in the system flow, the second side of the first plate heat exchanger 7 and the chilled water side of the first mechanical compression type water chilling unit 13 are mutually connected in parallel, and the adjustability of the first user 8 and the third user 15 is more convenient.
As shown in fig. 10, the outlet pipe on the primary side of the first plate heat exchanger 7 is connected to the inlet pipe of the first surface cooler 2, the outlet pipe of the first surface cooler 2 is connected to the inlet pipe on the primary side of the second plate heat exchanger 12, and the outlet pipe on the primary side of the second plate heat exchanger 12 is connected to the inlet pipe for cooling water of the first mechanical compression chiller 13. The primary side outlet water of the first plate heat exchanger 7 enters the first surface cooler 2 of the evaporative cooling water chilling unit and is used for precooling outdoor fresh air entering the evaporative cooling water chilling unit, the outlet water of the first surface cooler 2 enters the primary side of the second plate heat exchanger 12, the secondary side cold water of the second plate heat exchanger 12 is used for refrigerating the air conditioner second user 10, the primary side outlet water of the second plate heat exchanger 12 enters the first mechanical compression water chilling unit 13 as cooling water, and the cooling water outlet water of the first mechanical compression water chilling unit 13 returns to the evaporative cooling water chilling unit for circulating cooling. The second side of the first plate heat exchanger 7 is provided with the first user 8 of the air conditioner, the second side of the second plate heat exchanger 12 is provided with the second user 10 of the air conditioner, the chilled water side of the first mechanical compression type water chilling unit 13 is provided with the third user 15 of the air conditioner, in the system flow, the second side of the first plate heat exchanger 7 and the chilled water side of the first mechanical compression type water chilling unit 13 are mutually connected in parallel, and the adjustability of the first user 8 and the third user 15 is more convenient. The first user 8 may be an indoor high Wen Moduan, the second user 10 may be a fresh air handling unit, and the third user 15 may be an indoor low temperature terminal.
As shown in fig. 11, the evaporative cooling water chiller, the first plate heat exchanger 7 and the second plate heat exchanger 12 are all arranged on the roof 20, the first mechanical compression water chiller 13 is arranged between the basement 21 and the air conditioning equipment, the outlet pipe on the secondary side of the first plate heat exchanger 7 is connected with the chilled water inlet pipe of the first mechanical compression water chiller 13 through the second circulating pump 9 and the arranged drain valve 19, the chilled water outlet pipe of the first mechanical compression water chiller 13 is connected with inlet pipes of more than two first users 8 which are uniformly distributed and connected, the outlet pipes of the uniformly distributed and connected first users 8 are connected with the inlet pipe on the secondary side of the first plate heat exchanger 7 through the arranged drain valve 19, the outlet pipe on the secondary side of the second plate heat exchanger 12 is connected with the inlet pipe of more than two second users 10 which are uniformly distributed and connected through the third circulating pump 11 and the arranged drain valve 19, and the drain valve 19 is arranged on the outlet pipe of the first surface cooler 2 and the water supply pipe of the spray device 4. The evaporative cooling water chiller, the first plate heat exchanger 7 and the second plate heat exchanger 12 are arranged on a roof 20, the first mechanical compression water chiller 13 is arranged between a basement 21 or air conditioning equipment, cold water produced by the evaporative cooling water chiller passes through the primary side of the first plate heat exchanger 7, primary side backwater of the first plate heat exchanger 7 enters the primary side of the second plate heat exchanger 12, primary side effluent of the second plate heat exchanger 12 enters the first surface cooler 2 of the evaporative cooling water chiller of the roof 20, effluent of the first surface cooler 2 is supplied to the first mechanical compression water chiller 13 arranged in the basement through a vertical pipe as cooling water, cooling water effluent of the first mechanical compression water chiller 13 returns to the evaporative cooling water chiller through the vertical pipe for circulating cooling, effluent of the first user 8 returns to secondary side backwater of the first plate heat exchanger 7 through the vertical pipe, the high-temperature cold water prepared by the evaporative cooling cold water device is precooled firstly, the temperature is reduced and then is further cooled by a first mechanical compression type water chilling unit 13 and then is used for refrigerating a first user 8 of an air conditioner, the first user 8 can be indoor high Wen Moduan, the effluent of a second user 10 returns to the secondary side backwater of a second plate heat exchanger 12 through a vertical pipe and is cooled by the high-temperature cold water subjected to primary temperature rise, the second user 10 can be a fresh air unit, the number of the vertical pipes is reduced by the arrangement mode, the initial investment can be reduced, a drain pipe is arranged at the lowest point of a pipeline of a roof 20 or at the top layer of an air conditioning area, a drain valve 19 is arranged on the drain pipe, a drain pipe is arranged at the lowest point of the pipeline of the roof 20 of the secondary side of the first plate heat exchanger 7 and the second plate heat exchanger 12 or at the top layer of the air conditioning area, the drain valve 19 is arranged on the drain pipe, the cold water in the evaporative cooling cold water device and the first plate heat exchanger 7 and the second plate heat exchanger 12 is conveniently emptied when cooling is not needed in winter, so that the pipelines are ensured not to be frozen.
As shown in fig. 12, the chilled water outlet pipe of the first mechanical compression chiller 13 is connected to the inlet of the secondary side of the first plate heat exchanger 7 through a third user 15 and the first user 8 in series. A third user 15 is arranged at a water inlet of a first user 8, the first user 8 is an indoor high Wen Moduan, the third user 15 is an indoor low Wen Moduan, the second user 10 is a fresh air unit, low-temperature cold water of the first mechanical compression type water chilling unit 13 firstly exchanges heat through the third user 15, namely the indoor low Wen Moduan, then exchanges heat through the first user 8, namely the indoor high Wen Moduan, is precooled by high-temperature cold water of a primary side at a secondary side of the first plate heat exchanger 7 after the temperature rises, then enters the first mechanical compression type water chilling unit 13 for further cooling, recycling is achieved, the first user 8 and the third user 15 are arranged in series, and cold energy of the cold water is fully released.
As shown in fig. 13, the third user 15 is a low-temperature area Wen Moduan in the room, the third user 15 is set in a low-temperature area in the room, and the first user 8 is set in a high-temperature area in the room. The third user 15 is indoor low Wen Moduan, the third user 15 is arranged in a low-temperature area in the room, the first user 8 is indoor high Wen Moduan, the first user 8 is arranged in a high-temperature area in the room, cold water with lower temperature is firstly arranged in the low-temperature area, the cold load of the low-temperature area is taken away through the low-temperature tail end, then enters the first user 8, the cold load of the high-temperature area is taken away through high Wen Moduan, the cold quantity of the cold water is fully released, the high-temperature area and the low-temperature area can be separated from each other through building walls and other enclosing structures, and also can be separated through an inner sunshade device, and the first user 8, namely the high Wen Moduan, is arranged in the high-temperature area.
As shown in fig. 14, the third user 15 is an indoor low Wen Moduan, the third user 15 is disposed in an indoor low-temperature area, the first user 8 is an indoor high Wen Moduan, the first user 8 is disposed on one side of an indoor window, the indoor return air takes away the cold load of the window area through the passive curtain 23, and the return air enters the first user 8 for cooling treatment. The third user is 15 indoor low Wen Moduan, the third user 15 is arranged in an indoor low-temperature area, the first user 8 is indoor high Wen Moduan, the first user 8 is arranged in an indoor high-temperature area, indoor return air passes through a passive curtain 23, the cooling load of a window area is taken away, and the return air enters the first user 8 for cooling treatment.
As shown in fig. 15, the outlet pipe of the water tank 1 is connected to the inlet pipe of the primary side of the first plate heat exchanger 7 via the first circulation pump 6 and a three-way connection, wherein the other of the three-way connection is connected to the inlet pipe of the first surface cooler 2. The cold water prepared by the evaporative cooling cold water device is used for precooling fresh air by the first circulating pump 6, a part of cold water is used for precooling fresh air by the first surface cooler 2, a part of cold water enters the primary side of the first plate heat exchanger 7 for refrigerating by a user, the water temperature entering the first surface cooler 2 is lower, and the water outlet temperature of the evaporative cooling cold water device is lower.
As shown in fig. 16, a cooling water outlet pipe of the first mechanical compression type water chiller 13 is connected with a cooling water inlet of the second mechanical compression type water chiller 22, a cooling water outlet pipe of the second mechanical compression type water chiller 22 is connected with a spraying device 4, a bypass is arranged on an outlet pipe of the second circulating pump 9 connected with a chilled water inlet of the first mechanical compression type water chiller 13, the bypass is connected with an inlet of chilled water of the second mechanical compression type water chiller 22, and a chilled water outlet pipe of the second mechanical compression type water chiller 22 is communicated with a chilled water outlet pipe of the first mechanical compression type water chiller 13. The two mechanical compression type water chilling units are arranged, the water outlet of the first surface cooler 2 is connected in series through the cooling water sides of the two mechanical compression type water chilling units, after the chilled water of the two mechanical compression type water chilling units is mixed, the water return of the first user 8 is precooled by the high-temperature cold water of the primary side at the secondary side of the first plate heat exchanger 7, and the water outlet of the secondary side of the first plate heat exchanger 7 is respectively returned to the chilled water sides of the two mechanical compression type water chilling units for cooling under the action of the second circulating pump 9 and is recycled. By arranging two mechanical compression type water chilling units, the water quantity of cooling water is reduced, the configuration of the evaporative cooling water chilling unit is reduced, and the cold water quantity of the evaporative cooling water chilling unit is fully released.
Claims (13)
1. The utility model provides an air conditioner device that cold volume cascade utilized, includes evaporative cooling cold water device, is setting gradually water tank (1), air intake, filler (3), spray set (4) and exhaust fan (5) from bottom to top in its quick-witted incasement, is setting up first surface cooler (2), characterized by on the air intake: the water outlet pipe of the water tank (1) is connected with the inlet pipe of the primary side of the first plate heat exchanger (7) through the first circulating pump (6), the outlet pipe of the primary side of the water tank is connected with the inlet pipe of the primary side of the second plate heat exchanger (12), the outlet pipe of the primary side of the water tank is connected with the inlet pipe of the first surface air cooler (2), the outlet pipe of the first surface air cooler (2) is connected with the cooling water inlet pipe of the first mechanical compression type water chilling unit (13), the cooling water outlet pipe of the first mechanical compression type water chilling unit (13) is connected with the chilled water inlet pipe of the first plate heat exchanger (7) through the second circulating pump (9), the chilled water outlet pipe of the first mechanical compression type water chilling unit (13) is connected with the inlet pipe of the first user (8), the outlet pipe of the first user (8) is connected with the inlet pipe of the secondary side of the first plate heat exchanger (7), the outlet pipe of the second plate heat exchanger (12) is connected with the second user (7) through the second circulating pump (11), the outlet pipe of the second plate heat exchanger (10) is connected with the second user (7) through the outlet pipe of the second plate heat exchanger (7), the chilled water outlet pipe of the first mechanical compression type water chilling unit (13) is connected with the chilled water inlet pipe of the first mechanical compression type water chilling unit (13) through a fourth circulating pump (14) and a third user (15); valves (17) are respectively arranged on connecting pipes at the secondary side of the first plate heat exchanger (7), the secondary side of the second plate heat exchanger (12) and the outlet and on connecting pipes at the chilled water inlet and outlet of the first mechanical compression type water chilling unit (13), a pipeline between a first user (8) and the secondary side inlet valve (17) of the first plate heat exchanger (7) is communicated with a pipeline between the secondary side outlet valve (17) of the first plate heat exchanger (7) and the second circulating pump (9) through a communicating pipe, a valve (17) is arranged on the communicating pipe, a pipeline between the secondary side outlet valve (17) of the second plate heat exchanger (12) and the third circulating pump (11) and a pipeline between the secondary side inlet valve (17) of the second plate heat exchanger (12) and the second user (10) are respectively provided with a water supply bypass and a return water bypass, wherein the water supply bypass is connected with the secondary side outlet of the third plate heat exchanger (18) through the first end valve (17) and the end valve (17) through the pipeline between the bypass and the third plate heat exchange water inlet pipe (18) and the hot water return pipe; the evaporative cooling cold water device is arranged on a roof (20), outlet pipes of secondary sides of the first plate type heat exchangers (7) are connected with chilled water inlet pipes of the first mechanical compression cold water units (13) through second circulating pumps (9), the chilled water outlet pipes of the first mechanical compression cold water units (13) are connected with inlets of more than two first users (8) which are uniformly connected in parallel, the outlet pipes of the first users (8) which are uniformly connected in parallel are connected with inlet pipes of secondary sides of the first plate type heat exchangers (7), outlet pipes of secondary sides of the second plate type heat exchangers (12) are connected with inlets of more than two second users (10) which are uniformly connected in parallel through third circulating pumps (11), the outlet pipes of the second users (10) which are uniformly connected in parallel are connected with inlet pipes of secondary sides of the second plate type heat exchangers (12), drain pipes are arranged on water inlet pipes and outlet pipes of the water tank (1), the first surface coolers (2) and water supply pipes of the device (4), and drain valves (19) are arranged on the drain pipes.
2. The air conditioner for cascade utilization of cold energy according to claim 1, wherein: the outlet pipe of the primary side of the first plate heat exchanger (7) is connected with the inlet pipe of the first surface cooler (2), the outlet pipe of the first surface cooler (2) is connected with the inlet pipe of the primary side of the second plate heat exchanger (12), the outlet pipe of the primary side of the second plate heat exchanger (12) is connected with the cooling water inlet pipe of the first mechanical compression type water chilling unit (13), and the cooling water outlet pipe of the first mechanical compression type water chilling unit (13) is connected with the spraying device (4).
3. The air conditioner for cascade utilization of cold energy according to claim 2, wherein: the air inlet of the evaporative cooling cold water device is provided with two groups of first and second surface coolers (2, 16) which are connected in series, a primary side outlet pipe of the first plate heat exchanger (7) is connected with an inlet pipe of the first surface cooler (2), a bypass is further arranged on a primary side outlet pipe of the first plate heat exchanger (7), the bypass is connected with an inlet pipe of a primary side of the second plate heat exchanger (12) through a valve (17), an outlet pipe of the primary side of the second plate heat exchanger (12) is connected with an inlet pipe of the second surface cooler (16), and outlet pipes of the first and second surface coolers (2, 16) are connected with a cooling water inlet pipe of the first mechanical compression cold water unit (13).
4. The air conditioner for cascade utilization of cold energy according to claim 2, wherein: the outlet pipe of the primary side of the first plate heat exchanger (7) is provided with a bypass, the bypass is connected with the inlet pipe of the primary side of the second plate heat exchanger (12) through a valve (17), the outlet pipe of the first surface cooler (2) is connected with the cooling water inlet pipe of the first mechanical compression type water chilling unit (13), the outlet pipe of the primary side of the second plate heat exchanger (12) is communicated with the outlet pipe of the first surface cooler (2), the outlet pipe of the secondary side of the first plate heat exchanger (7) is communicated with the chilled water inlet pipe of the first mechanical compression type water chilling unit (13), and the chilled water outlet pipe of the first mechanical compression type water chilling unit (13) is communicated with the water inlet pipe of a first user.
5. The air conditioner for cascade utilization of cold energy according to claim 4, wherein: the outlet pipe of the primary side of the first plate heat exchanger (7) is connected with the inlet pipe of the primary side of the second plate heat exchanger (12) through a three-way joint and a valve (17), the outlet pipe of the primary side of the second plate heat exchanger (12) is connected with the inlet pipe of the first surface cooler (2), and the other interface of the three-way joint is connected with the outlet pipe of the primary side of the second plate heat exchanger (12).
6. The air conditioner for cascade utilization of cold energy according to claim 2, wherein: a bypass is arranged on an outlet pipe of the primary side of the first plate heat exchanger (7), the bypass is connected with an inlet of the primary side of the second plate heat exchanger (12) through a valve (17), and an outlet pipe of the primary side of the second plate heat exchanger (12) is connected with an outlet pipe of the first surface cooler (2).
7. The air conditioner for cascade utilization of cold energy according to claim 1, wherein: the outlet pipe of the primary side of the first plate heat exchanger (7) is connected with the inlet pipe of the first surface cooler (2), the outlet pipe of the first surface cooler (2) is connected with the inlet pipe of the primary side of the second plate heat exchanger (12), and the outlet pipe of the primary side of the second plate heat exchanger (12) is connected with the inlet pipe of cooling water of the first mechanical compression type water chilling unit (13).
8. The air conditioner for cascade utilization of cold energy according to claim 1, wherein: the evaporative cooling water chiller, first, second plate heat exchanger (7, 12) all set up on roofing (20), first mechanical compression formula cooling water unit (13) set up in basement (21) or air conditioning equipment room, first plate heat exchanger (7) secondary side outlet pipe is being connected first mechanical compression formula cooling water unit (13) chilled water inlet pipe through second circulating pump (9) and drain valve (19) that set up, first mechanical compression formula cooling water unit (13) chilled water outlet pipe is being connected the inlet pipe of equipartition parallel connection more than two first users (8), the outlet pipe of equipartition parallel connection first user (8) is being connected the inlet pipe of first plate heat exchanger (7) secondary side through drain valve (19) that set up, the outlet pipe of second plate heat exchanger (12) secondary side is being connected the inlet pipe of equipartition parallel connection more than two second users (10) through third circulating pump (11) and drain valve (19) that set up, install drain valve (19) through setting up on the outlet pipe of first surface cooler (2) and spray water supply pipe.
9. The air conditioner for cascade utilization of cold energy according to claim 1, wherein: the chilled water outlet pipe of the first mechanical compression type water chilling unit (13) is connected with the inlet of the secondary side of the first plate heat exchanger (7) through a third user (15) and the first user (8) which are connected in series.
10. The air conditioner for cascade utilization of cold energy according to claim 9, wherein: the third user (15) is the indoor end, and the third user (15) sets up in indoor low temperature region, and first user (8) sets up in indoor high temperature region.
11. The air conditioner for cascade utilization of cold energy according to claim 9, wherein: the third user (15) is indoor low Wen Moduan, the third user (15) is arranged in a low-temperature area in the room, the first user (8) is indoor high Wen Moduan, the first user (8) is arranged on one side of an indoor window, indoor return air takes away the cold load of the window area through a passive curtain (23), and the return air enters the first user (8) for cooling treatment.
12. The air conditioner for cascade utilization of cold energy according to claim 9, wherein: the outlet pipe of the water tank (1) is connected with the inlet pipe of the primary side of the first plate heat exchanger (7) through the first circulating pump (6) and a three-way connector, wherein the other connector of the three-way connector is connected with the inlet pipe of the first surface cooler (2).
13. The air conditioner for cascade utilization of cold energy according to claim 9, wherein: the cooling water outlet pipe of the first mechanical compression type water chilling unit (13) is connected with the cooling water inlet of the second mechanical compression type water chilling unit (22), the cooling water outlet pipe of the second mechanical compression type water chilling unit (22) is connected with the spraying device (4), the bypass is arranged on the outlet pipe of the second circulating pump (9) connected with the cooling water inlet of the first mechanical compression type water chilling unit (13), the bypass is connected with the cooling water inlet of the second mechanical compression type water chilling unit (22), and the cooling water outlet pipe of the second mechanical compression type water chilling unit (22) is communicated with the cooling water outlet pipe of the first mechanical compression type water chilling unit (13).
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