Condensate water and energy recycling system

Abstract

The invention discloses a condensate water and energy recycling system, which belongs to the technical field of energy conservation of central air conditioners and comprises an exhaust unit, a heat recovery unit and a fresh air unit, the exhaust unit, the heat recovery unit and the fresh air unit are sequentially and hermetically assembled, and the upper end and the lower end of the exhaust unit are respectively communicated with the upper end and the lower end of the heat recovery unit. Exhaust air can enter the heat recovery unit from the exhaust unit for heat exchange, a pre-cooling unit and a cooling unit are arranged in the fresh air unit, fresh air is pre-cooled through the pre-cooling unit, and the pre-cooled fresh air is re-cooled through the cooling unit and then fed into a use side. Condensate water collected by the condensate water recovery system can supplement water consumed by the spraying heat recovery system and provide cooling capacity for the pre-cooling unit. By means of the condensate water recycling system, the recycled condensate water can be introduced into the pre-cooling unit, the temperature of fresh air in the pre-cooling unit is reduced, and energy recycling of the condensate water is achieved.

Description

Technical Field

[0001] The invention relates to a condensed water and energy recovery and recycling system, belonging to the technical field of central air-conditioning energy saving. Background Art

[0002] In modern large buildings, the air inside the building is not easy to circulate, so a fresh air system is needed to circulate the air and adjust the air temperature to a suitable temperature. Central air conditioning systems are usually used to achieve the above goals to ensure the health, comfort and energy efficiency of indoor air. The volume of fresh air discharged into the room by the central air conditioning system is basically the same as the exhaust air discharged from the room, but there is a certain temperature difference.

[0003] At present, most of the central air conditioning systems use direct exhaust to exhaust indoor air, that is, the indoor air is directly exhausted to the outside through the exhaust fan, and the heat inside the exhaust air is not recovered. If the heat of the exhaust air cannot be used, the central air conditioning system has low energy efficiency, high operating costs, and a greater impact on the environment.

[0004] Fresh air needs to be cooled and dehumidified when entering the room. The low-temperature condensed water generated after the fresh air is cooled and dehumidified is not fully utilized, and the low-temperature energy in the condensed water is not fully recycled. Currently, similar products on the market directly discharge the condensed water, and the condensed water is not reasonably recycled. Summary of the invention

[0005] The technical problem to be solved by the present invention is to provide a condensed water and energy recovery and recycling system, which solves the problems of insufficient heat recovery in exhaust air, insufficient recovery of low-temperature energy of condensed water and unreasonable utilization of condensed water.

[0006] The technical problem to be solved by the present invention is achieved by adopting the following technical solution: a condensed water and energy recovery and recycling device, comprising

[0007] Exhaust fan unit, heat recovery unit, fresh air unit,

[0008] The exhaust fan unit is sealed and assembled with the heat recovery unit and the fresh air unit in sequence. The upper end and the lower end of the exhaust fan unit are respectively connected with the upper end and the lower end of the heat recovery unit. Exhaust air can enter the heat recovery unit from the exhaust fan unit for heat exchange. A precooling unit and a cooling unit are arranged inside the fresh air unit. The fresh air is precooled by the precooling unit. The precooled fresh air is recooled by the cooling unit and then sent to the use side.

[0009] A spray heat recovery system is arranged inside the heat recovery unit, and a condensate water recovery system is also arranged inside the fresh air unit. The spray heat recovery system can recover the latent heat in the exhaust air, and the condensate water recovery system can collect the condensate water generated by the cooling of the fresh air. The condensate water collected by the condensate water recovery system can replenish the water consumed by the spray heat recovery system and provide cooling capacity for the pre-cooling unit.

[0010] Preferably, the spray heat recovery system includes a water distributor, a water pool, a spray heat recovery mechanism, and a spray water pump. The water pool and the spray heat recovery mechanism are provided with a pipeline, and the water in the water pool can be transferred to the spray heat recovery mechanism along the pipeline through the spray water pump.

[0011] Preferably, a filler is provided inside the spray heat recovery mechanism, and the water distributor can fill water into the filler, and the exhaust air performs heat exchange in the spray heat recovery mechanism.

[0012] Preferably, the pipeline is connected to the precooling unit.

[0013] Preferably, the condensate recovery system is connected to a pipeline, and the condensate recovery system comprises a condensate receiving pan and a sunken water tank. The condensate receiving pan is arranged at the bottom of the cooling unit, and the condensate receiving pan is connected to the sunken water tank.

[0014] Preferably, the sunken water tank is provided with a condensation water pump, and the condensation water pump transports the water inside the sunken water tank to the water pool.

[0015] A method for recycling condensed water and energy, preferably comprising the following steps:

[0016] Step 1: The water in the water pool is moved to the water distributor through the spray water pump, and the water is filled into the inner side of the filler through the water distributor. The exhaust air enters the exhaust fan unit and contacts the filler for heat exchange, and the exhaust air after heat exchange is discharged from the exhaust fan unit;

[0017] Step 2: The condensed water receiving pan can collect the condensed water generated when the fresh air is cooled in the pre-cooling unit and the cooling unit and move the condensed water to the sunken water tank for collection;

[0018] Step 3: The condensed water collected in the sunken water tank is transported to the water pool through the condensed water pump;

[0019] Preferably, when the exhaust air passes through the filler, a portion of the moisture in the filler is converted from liquid to gas after evaporation and heat exchange and is discharged with the exhaust air.

[0020] Preferably, the water in the filler that has not been phase-changed drips into the water pool from the bottom of the spray heat recovery mechanism.

[0021] Preferably, the condensed water can replenish the water lost during the heat exchange process in the packing.

[0022] The beneficial effects of the present invention are:

[0023] (1) Through the present invention, the fresh air is cooled when passing through the pre-cooling unit and the cooling unit, and the temperature of the fresh air is reduced. When the moisture inside the fresh air contacts the pre-cooling unit and the cooling unit with lower temperatures, condensed water will form on the surface of the unit. Normally, the condensed water is directly discharged and flows into the wastewater pipeline for drainage, and the condensed water cannot be recycled at this time. A condensed water recovery system is set at the bottom of the cooling unit. After the condensed water is collected, the condensed water is transported to the spray heat recovery system through a condensed water pump, thereby improving the recovery rate of the condensed water.

[0024] (2) Through the present invention, a sunken water tank is arranged in the condensate water recovery system. After collecting a certain volume of water, the condensate is transported to the spray heat recovery system through a condensate pump. By arranging the sunken water tank, the condensate can be temporarily stored. After the condensate reaches a certain amount, the condensate can be transferred, thereby improving the transfer efficiency of the condensate.

[0025] (3) Through the present invention, the temperature of the recovered condensed water is relatively low, and when it is added to the water pool, the water temperature in the water pool can be lowered. When the water is transported from the pipeline to the spray heat recovery mechanism through the spray water pump, the temperature of the precooling unit can be lowered. The temperature of the fresh air can be lowered when it enters the precooling unit, and the precooled fresh air enters the cooling unit for further cooling. After the fresh air is precooled, cooling it by the cooling unit can reduce the power used by the cooling unit. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] Figure 1 It is a schematic diagram of the front structure of the present invention.

[0027] Figure 2 It is a schematic diagram of the back structure of the present invention.

[0028] Figure 3 It is a front view of the present invention.

[0029] Figure 4 It is a schematic diagram of the external device of the present invention.

[0030] Figure 5 It is a flow diagram of fresh air and exhaust air of the present invention.

[0031] In the figure: 1-exhaust unit, 2-heat recovery unit, 3-fresh air treatment unit, 11-exhaust filter, 12-exhaust mechanism, 21-water tank, 22-spray heat recovery mechanism, 31-precooling unit, 32-cooling unit, 33-condensate receiving tray, 331-sunken water tank, 34-condensate pump, 35-spray water pump, 36-fresh air filter, 37-air supply mechanism. DETAILED DESCRIPTION

[0032] In order to make the technical means, creative features, objectives and effects of the present invention easier to understand, the present invention is further described below in conjunction with specific embodiments.

[0033] Example 1

[0034] like Figure 1-Figure 5 As shown, a condensate water and energy recovery and recycling device includes an exhaust fan unit 1, a heat recovery unit 2, and a fresh air treatment unit 3.

[0035] The exhaust fan unit 1, the heat recovery unit 2 and the fresh air handling unit 3 are sealed and assembled in sequence, wherein the upper end and the lower end of the exhaust fan unit 1 are respectively connected with the upper end and the lower end of the heat recovery unit 2, and the exhaust air enters the heat recovery unit 2 from the exhaust fan unit 1 for heat exchange. A precooling unit and a cooling unit are arranged inside the fresh air handling unit. The fresh air is precooled by the precooling unit, and the precooled fresh air is re-cooled by the cooling unit and then sent to the use side.

[0036] In this embodiment, the cooling unit includes a fresh air re-cooling coil, a pipe is arranged inside the fresh air re-cooling coil, and the pipe is connected to the refrigeration unit, and the refrigeration unit is not arranged in the exhaust unit 1, the heat recovery unit 2, and the fresh air processing unit 3. The refrigeration unit can provide cold water, and the cold water flows into the fresh air re-cooling coil to provide cold capacity for the cooling unit, so as to further cool the fresh air.

[0037] A spray heat recovery system is provided in the middle of the inner side of the heat recovery unit 2, and a condensate recovery system is provided inside the fresh air unit 3. The spray heat recovery system can recover the latent heat in the exhaust air, and the condensate recovery system can collect the condensate generated when the fresh air is cooled down. The condensate collected by the condensate recovery system can be transported to the spray heat recovery system to supplement the water consumed by the spray heat recovery system when recovering the latent heat of the exhaust air.

[0038] Reference Figure 3 , Figure 5 The spray heat recovery system includes a water distributor, a water pool 21, a spray heat recovery mechanism 22, and a spray water pump 35. The water pool 21 is connected to the spray heat recovery mechanism 22 through a pipeline, and the water in the spray water pool 21 can be transferred to the spray heat recovery mechanism along the pipeline through the spray water pump 35.

[0039] The water distributor includes a water distribution pipe and a nozzle. One end of the water distribution pipe is connected to the pipeline, and the other end is provided with a nozzle. The water inside the spray water receiving pool 21 can be transferred to the water distribution pipe along the pipeline through the spray water pump 35, and then sprayed out from the nozzle. A filler is provided inside the spray heat recovery mechanism 22, and the water distributor is provided at the connection between the pipeline and the spray heat recovery mechanism 22. The water distributor can fill the water flowing into the pipeline into the filler. The filler can increase the contact area between the condensed water and the air, reduce the flow rate of the water, and increase the evaporation and heat exchange efficiency of the water. In this embodiment, the filler adopts a honeycomb structure filler, specifically: a hexagonal or diamond channel structure, the condensed water flows in the channel, and the air can exchange heat with the condensed water through the filler. The water distributor can evenly distribute the condensed water on the top of the filler, and the condensed water moves downward along the filler under the action of gravity.

[0040] The exhaust air is heat exchanged in the spray heat recovery mechanism 22, and the exhaust air enters the exhaust fan unit 1 from the exhaust filter 11, and then flows into the spray heat recovery mechanism for heat exchange. The exhaust air after heat exchange is discharged from the exhaust fan unit 1 through the exhaust mechanism 12. In this process, the main cooling methods of the exhaust air in the heat exchange link are:

[0041] 1. Heat transfer: there is a certain temperature difference between the exhaust air and the water in the filler, and heat is exchanged between the exhaust air and the water through heat transfer;

[0042] 2. Water evaporation: The water in the filler is converted into water vapor through evaporation. When the water is converted from liquid to gas, it can absorb the heat of exhaust air and unevaporated water. The filler adopts a honeycomb structure, which increases the surface area of ​​water, reduces the obstruction of water to fresh air, and increases the evaporation rate of water.

[0043] The condensed water recovery system is connected to the pipeline, and the condensed water recovery system includes a condensed water receiving pan 33 and a sunken water tank 331. The condensed water receiving pan 33 is arranged at the bottom of the cooling unit, and the sunken water tank 331 is arranged on one side of the condensed water receiving pan 33, and they are connected to each other. The condensed water receiving pan 33 can receive the condensed water generated during the cooling of the cooling unit, and the condensed water flows into the sunken water tank 331 for temporary storage.

[0044] A condensate pump 34 is provided on one side of the sunken water tank 331. When the condensate inside the sunken water tank 331 reaches a certain amount, the condensate pump 34 can pump the condensate inside the sunken water tank 331 into the water pool 21. The condensate can replenish the water consumed by the heat recovery unit during heat exchange with the exhaust air.

[0045] The pipeline is connected to the precooling unit 31, and the condensed water passes through the precooling unit when flowing in the pipeline. Since the temperature of the condensed water is relatively low, the cooling capacity of the precooling unit 31 can be increased. Therefore, when the fresh air enters the fresh air processing unit 3 from the fresh air filter 36, it first passes through the precooling unit for cooling and precooling. By using the condensed water with a lower temperature to lower the temperature of the precooling unit, the precooling unit contacts the fresh air for heat exchange, thereby lowering the temperature of the fresh air. When the precooled fresh air passes through the cooling unit 32, the temperature difference to the target temperature is reduced, and the required cooling capacity is reduced, so the cooling mechanism can reduce the input power and reduce energy consumption.

[0046] The fresh air is precooled in the precooling unit 31, and the precooled fresh air is further cooled by the cooling unit 32. The fresh air enters the fresh air processing unit 3 from the fresh air filter 36, and then flows into the precooling unit 31 for precooling. The precooled fresh air is further cooled by the cooling unit 32 to reach the set temperature, and the fresh air that meets the set temperature is discharged from the fresh air processing unit 3 through the air supply mechanism 37.

[0047] In this embodiment, the working processes of the exhaust unit 1, the heat recovery unit 2, and the fresh air processing unit 3 are as follows:

[0048] Step 1: Move the water in the pool 21 to the water distributor through the spray water pump 35, fill the water in the pool 21 into the inner side of the filler through the water distributor, and the exhaust air enters the exhaust fan unit and contacts the filler for heat exchange, and the exhaust air after heat exchange is discharged from the exhaust fan unit.

[0049] Step 2: The condensed water receiving pan 33 can collect the condensed water generated when the fresh air is cooled in the pre-cooling unit 31 and the cooling unit 32 and move the condensed water to the sunken water tank 331 for collection.

[0050] Step 3: The condensed water collected in the sunken water tank 331 is transported to the water pool 21 through the condensed water pump 34 .

[0051] In this process, when the exhaust air passes through the packing, it exchanges heat with the water in the packing. Part of the water is converted from liquid to gas and discharged out of the machine with the exhaust air, and the other part of the water that has not been exchanged drips from the bottom of the spray heat recovery mechanism 22 into the water pool 21. The condensed water can make up for the loss in the heat exchange process in the packing.

[0052] The temperature of the recovered condensed water is relatively low, and replenishing it to the water pool 21 can reduce the water temperature of the water in the water pool 21. The water in the water pool 21 is transported from the pipeline to the spray heat recovery mechanism 22 through the spray water pump 35, which can reduce the temperature of the precooling unit 31. The temperature reduction of the precooling unit 31 can process the fresh air entering the precooling unit, and the fresh air can reduce the temperature when entering the precooling unit. The precooled fresh air enters the cooling unit for further cooling. After the fresh air is precooled and then cooled by the cooling unit, the power used by the cooling unit can be reduced.

[0053] The basic principles, main features and advantages of the present invention are shown and described above. It should be understood by those skilled in the art that the present invention is not limited to the above embodiments. Without departing from the spirit and scope of the present invention, the present invention may have various changes and improvements, which fall within the scope of the present invention. The scope of the present invention is defined by the attached claims and their equivalents.

Claims

1. A condensed water and energy recovery and recycling system, comprising: Exhaust fan unit, heat recovery unit, fresh air unit, The exhaust fan unit is sealed and assembled with the heat recovery unit and the fresh air unit in sequence. The upper end and the lower end of the exhaust fan unit are respectively connected with the upper end and the lower end of the heat recovery unit. Exhaust air can enter the heat recovery unit from the exhaust fan unit for a heat exchange. A precooling unit and a cooling unit are arranged inside the fresh air unit. The fresh air is precooled by the precooling unit. The precooled fresh air is recooled by the cooling unit and then sent to the use side. Features: A spray heat recovery system is arranged inside the heat recovery unit, and a condensate water recovery system is also arranged inside the fresh air unit. The spray heat recovery system can recover the latent heat in the exhaust air, and the condensate water recovery system can collect the condensate water generated by the cooling of the fresh air. The condensate water collected by the condensate water recovery system can replenish the water consumed by the spray heat recovery system and provide cooling capacity for the pre-cooling unit.

2. A condensed water and energy recovery and recycling system according to claim 1, characterized in that: The spray heat recovery system includes a water distributor, a water pool, a spray heat recovery mechanism, and a spray water pump. The water pool and the spray heat recovery mechanism are provided with pipelines, and the water in the water pool can be transferred to the spray heat recovery mechanism along the pipeline through the spray water pump.

3. A condensed water and energy recovery and recycling system according to claim 2, characterized in that: A filler is arranged inside the spray heat recovery mechanism, and the water distributor can fill water into the filler, and the exhaust air is used for heat exchange in the spray heat recovery mechanism.

4. A condensed water and energy recovery and recycling system according to claim 2, characterized in that: The pipeline is connected to the precooling unit.

5. The condensed water and energy recovery and recycling system according to claim 2, characterized in that: The condensate recovery system is connected to the pipeline, and the condensate recovery system includes a condensate receiving pan and a sunken water tank. The condensate receiving pan is arranged at the bottom of the cooling unit, and the condensate receiving pan is connected to the sunken water tank.

6. A condensed water and energy recovery and recycling system according to claim 5, characterized in that: The sunken water tank is provided with a condensation water pump, and the condensation water pump transports the water inside the sunken water tank to the water pool.

7. A condensed water and energy recovery and recycling system according to any one of claims 1 to 6, characterized in that: The following steps are included Step 1: The water in the water pool is moved to the water distributor through the spray water pump, and the water is filled into the inner side of the filler through the water distributor. The exhaust air enters the exhaust fan unit and contacts the filler for heat exchange, and the exhaust air after heat exchange is discharged from the exhaust fan unit; Step 2: The condensate receiving pan can collect condensate generated when the fresh air is cooled in the pre-cooling unit and the cooling unit and move the condensate to the sunken water tank; Step 3: The condensed water collected in the sunken water tank is transported to the water pool through the condensed water pump.

8. A condensed water and energy recovery and recycling system according to claim 7, characterized in that: When the exhaust air passes through the filler, a portion of the water in the filler is converted from liquid to gas after evaporation and heat exchange and is discharged with the exhaust air.

9. A condensed water and energy recovery and recycling system according to claim 7, characterized in that: The water in the packing that has not been phase-changed drips into the water pool from the bottom of the spray heat recovery mechanism.

10. A condensed water and energy recovery and recycling system according to any one of claims 8-9, characterized in that: The condensed water can replenish the water lost during the heat exchange process in the packing.

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