CN209101477U - A heat recovery type evaporative cooling air handling unit - Google Patents

Abstract

The utility model discloses a kind of recovery type heats to evaporate cooling air processor group, including machine unit shell, once air inlet and air outlet are respectively set on the opposite side wall of machine unit shell, an air inlet is disposed with low efficient filter, heat recovery units, heating unit, standpipe indirect evaporating-cooling unit, harl unit and blowing unit according to the flow direction of fresh air in air outlet；A kind of recovery type heat of the utility model evaporates cooling air processor group, and the energy discarded in the return air that can be recycled to the return side of evaporation cooling channel air-conditioning system recycles, and improves the utilization efficiency of the energy.

Description

A heat recovery type evaporative cooling air handling unit

technical field

The utility model belongs to the technical field of air-conditioning refrigeration equipment, in particular to a heat recovery type evaporative cooling air processing unit.

Background technique

Under the background of national energy saving and emission reduction, HVAC is also developing in the direction of green, energy saving and low carbon. Evaporative cooling technology is this green, energy saving and low carbon refrigeration and air conditioning technology. With the development of this technology, it has been widely used in civil buildings, industrial buildings and public buildings in our country.

With the continuous development of low-energy buildings, traditional mechanical refrigeration and air-conditioning systems are difficult to meet the requirements of low energy consumption due to high operating costs. Therefore, the combination of heat recovery technology and evaporative cooling technology is a solution to the above problems. Therefore, a heat recovery type evaporative cooling air handling unit is proposed. The purpose is to recover the waste energy in the return air on the return air side of the evaporative cooling ventilation and air conditioning system for reuse, to achieve maximum energy saving on the basis of evaporative cooling technology, and to provide reference for the selection of appropriate cooling solutions for low-energy buildings.

Utility model content

The purpose of this utility model is to provide a heat recovery type evaporative cooling air processing unit, which can reuse the energy discarded in the return air recovered from the return air side of the evaporative cooling ventilation and air conditioning system to improve the utilization efficiency of energy.

The technical scheme adopted by the utility model is that a heat recovery type evaporative cooling air processing unit includes a unit casing, and the opposite side walls of the unit casing are respectively provided with a primary air inlet and an air supply port, and the primary air inlet and the air supply port are respectively arranged A coarse filter, a heat recovery unit, a heating unit, a riser indirect evaporative cooling unit, a cold mist unit and an air supply unit are sequentially arranged in the mouth according to the flow direction of the fresh air.

The utility model is also characterized in that,

There are two primary air inlets, and the two primary air inlets are respectively arranged on the side wall of the unit casing, and each primary air inlet is provided with a first air valve.

The heat recovery unit, that is, the gravity heat pipe heat exchanger, is formed by arranging a plurality of gravity heat pipe bundles with the same pipe diameter in a sequential manner.

The heating unit includes a third water supply pipe, one end of the third water supply pipe is connected with a heat exchange coil, the other end of the heat exchange coil is connected with a return pipe, the return pipe is provided with a first valve, and the other end of the third water supply pipe A second valve is provided.

A first axial flow fan is also arranged below the heat exchange coil, and a second air valve is also arranged on the side wall of the bottom surface of the unit casing, and the second air valve is located directly below the first axial flow fan.

The riser indirect evaporative cooling unit includes the first circulating water tank, the riser indirect evaporative cooler, the equalizing device, the first water distributor and the second axial flow fan, which are arranged in sequence from bottom to top, and the second axial flow fan is located in the unit casing. On the outer side wall of the first circulating water tank, a first water supply pipe is arranged on the first water supply pipe, a first circulating water pump and a valve are sequentially arranged on the first water supply pipe, and the other end of the first water supply pipe is connected with the first water distributor. The side wall of the body is also provided with a single-layer louver air inlet, and the single-layer louver air inlet is located between the riser indirect evaporative cooler and the first circulating water tank.

The cold mist unit includes a second circulating water tank and a second water distributor arranged in sequence from bottom to top, the bottom of the second water distributor and the second circulating water tank are connected through a second water supply pipe, and the second water supply pipe is equipped with a second water supply pipe. Two circulating water pumps.

A water baffle is also arranged between the cold mist unit and the air supply unit. The top end of the water baffle is fixed on the inner wall of the unit casing. Circulating water tank.

The air supply unit is a blower array composed of a plurality of blowers. There are three blowers arranged in parallel from top to bottom, and the air supply port is also provided with a third air valve.

The beneficial effects of the present utility model are:

1) A heat recovery type evaporative cooling air processing unit of the present invention utilizes the efficient heat exchange capacity of the gravity heat pipe heat exchanger to recover the cooling/heat in the return air. Fully reduce the size of the unit equipment, thereby reducing the footprint of the unit;

2) The utility model is a heat recovery type evaporative cooling air processing unit, which adopts a riser indirect evaporative cooler, which can not only meet a certain cooling demand in summer, but also reduce the floor space of the equipment and reduce the cost of The probability of sand and other debris blocking the flow channel;

3) A heat recovery type evaporative cooling air treatment unit of the present invention uses the cold mist system as the direct section, which can improve the heat and moisture exchange capacity of the direct evaporative cooling section, and can reduce the usage of circulating water;

4) In a heat recovery type evaporative cooling air processing unit of the present invention, a water equalization device is arranged in the indirect evaporative cooler of the standpipe, so that the water film in the secondary flow passage of the indirect standpipe evaporative cooler can be evenly arranged, which is convenient to improve the exchange rate. Heat transfer capacity of the heater;

5) The utility model is a heat recovery type evaporative cooling air processing unit, which adopts a fan array to facilitate the control of the air supply volume, facilitate the debugging of the equipment, and facilitate the adjustment of the air volume during use;

6) The utility model is a heat recovery type evaporative cooling air processing unit, a guide plate is arranged on the lower side of the water baffle, so as to fully recover the amount of water blocked by the water baffle and achieve the purpose of saving circulating water.

Description of drawings

Fig. 1 is the structural representation of the interlocking mechanism of a heat recovery type evaporative cooling air handling unit of the present utility model;

2 is a top view of a gravity heat pipe heat exchanger in a heat recovery type evaporative cooling air processing unit of the present invention;

3 is a schematic diagram of the structure of the fan array in a heat recovery type evaporative cooling air processing unit of the present invention.

In the figure, 1. Unit shell, 2. Coarse efficiency filter, 3. Gravity heat pipe heat exchanger, 4. First axial flow fan, 5. Second air valve, 6. First circulating water tank, 7. Single Layer louver air inlet, 8. First water supply pipe, 9. Valve, 10. First circulating water pump, 11. Second circulating water pump, 12. Second water supply pipe, 13. Second circulating water tank, 14. Water baffle, 15. Air deflector, 16. Blower, 17. First air valve, 18. Third air valve, 19. Air supply port, 20. Primary air inlet, 21. Third water supply pipe, 22. Heat exchange coil, 23 .Return pipe, 24. The first valve, 25. The second valve, 26. The indirect evaporative cooler of the riser, 27. The equalizing device, 28. The first water distributor, 29. The second axial flow fan, 30. The first Two water distributors.

Detailed ways

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

A heat recovery type evaporative cooling air processing unit of the present invention, as shown in Figures 1 and 2, comprises a unit casing 1, and a primary air inlet 20 and an air supply outlet 19 are respectively provided on the opposite side walls of the unit casing 1. A coarse filter 2 , a heat recovery unit, a heating unit, a riser indirect evaporative cooling unit, a cold mist unit and an air supply unit are sequentially arranged in the primary air inlet 20 and the air supply port 19 according to the flow direction of the fresh air.

There are two primary air inlets 20 , the two primary air inlets 20 are respectively arranged on the side wall of the unit casing, and each primary air inlet 20 is provided with a first air valve 17 .

The heat recovery unit, that is, the gravity heat pipe heat exchanger 3, is formed by arranging a plurality of gravity heat pipe bundles with the same pipe diameter in a sequential manner.

The heating unit includes a third water supply pipe 21, one end of the third water supply pipe 21 is connected with a heat exchange coil 22, the other end of the heat exchange coil 22 is connected with a return pipe 23, and the return pipe 23 is provided with a first valve 24, The other end of the third water supply pipe 21 is provided with a second valve 25 .

A first axial flow fan 4 is also arranged below the heat exchange coil 22 , and a second air valve 5 is also arranged on the bottom side wall of the unit casing, and the second air valve 5 is located directly below the first axial flow fan 4 .

The standpipe indirect evaporative cooling unit includes a first circulating water tank 6, a standpipe indirect evaporative cooler 26, an equalizing device 27, a first water distributor 28 and a second axial flow fan 29, which are arranged in sequence from bottom to top. The fan 29 is located on the outer side wall of the unit casing, the first circulating water tank 6 is provided with a first water supply pipe 8, the first water supply pipe 8 is sequentially provided with a first circulating water pump 10 and a valve 9, and the first water supply pipe 8 is provided with a first water supply pipe 8. The other end is connected to the first water distributor 28, and the side wall of the unit casing is also provided with a single-layer louver air inlet 7, and the single-layer louver air inlet 7 is located between the riser indirect evaporative cooler 26 and the first circulating water tank 6. between.

The cold mist unit includes a second circulating water tank 13 and a second water distributor 30 arranged in sequence from bottom to top. The bottom of the second water distributor 30 and the second circulating water tank 13 are connected through a second water supply pipe 12, and the second The water supply pipe 12 is provided with a second circulating water pump 11 .

A water baffle 14 is also arranged between the cold mist unit and the air supply unit. The top end of the water baffle 14 is fixed on the inner wall of the unit casing. The other end of the water baffle 14 is provided with a deflector 15. The other end goes deep into the second circulating water tank 13 .

As shown in FIG. 3 , the air supply unit is a blower array composed of a plurality of blowers 16 . There are three blowers 16 arranged in parallel from top to bottom, and a third air valve 18 is also provided at the air supply port 19 .

When the heat recovery type evaporative cooling air processing unit of the utility model is in use, the working flow of the unit is divided into: 1. the working flow of air treatment in summer; 2. the working flow of air treatment in winter; 3. the working flow of water system, wherein the water The system work process is divided into the work process of the water system of the riser indirect evaporative cooling unit, the work process of the water system of the cooling mist unit, and the work process of the water system of the heating unit.

Summer air treatment workflow: the first air valve 17 and the second air valve 5 located below are closed, the first air valve 17 located above is opened, and the outdoor high-temperature air is filtered by the coarse filter 2 and then After the working gravity heat pipe heat exchanger 3, it enters the indirect riser evaporative cooler 26, and the outdoor secondary air enters the secondary flow channel of the riser indirect evaporative cooler 26 under the action of the second axial flow fan 29, The heat and moisture exchange with the water film in the riser takes away the heat of the air outside the pipe. At this time, the filtered air is cooled by isohumidity, its temperature decreases, and the relative humidity does not increase. The air cooled by the indirect evaporative cooling unit of the riser enters the cold mist unit, and exchanges heat and moisture with the atomized water mist. At this time, the air is humidified and cooled by isenthalpy, the temperature decreases, and the relative humidity also increases. When the cooled air passes through the water baffle 14, the water mixed in the air will return to the circulating water tank 13 along the flow channel through the deflector 15 under the action of the water baffle, so as to save water and prevent the air supply belt. purpose of water. The cooled air is finally sent to the area that needs to be cooled by the fan array formed by the blower 16 .

The secondary air in the standpipe indirect evaporative cooler 26 uses outdoor air, and the outdoor air enters the secondary flow passage of the standpipe indirect evaporative cooler after passing through the single-layer louver air inlet 7 to exchange heat and moisture with the water film on the pipe wall. In order to take away the heat of the primary air outside the pipe wall, it is finally discharged under the action of the second axial flow fan 29 .

Working process of air treatment in winter

In winter, both the first air valve 17 and the second valve 5 are opened, and the exhaust air in the room is filtered by the coarse filter 2 and then passes through the evaporation section of the gravity heat pipe heat exchanger 3. At this time, the heat in the return air is removed by gravity. The circulating working medium in the heat pipe heat exchanger 3 is finally discharged by the first axial flow fan 4 after being absorbed. The circulating working medium absorbs the heat in the return air in the evaporation section and evaporates to form a gaseous working medium, and finally moves to the condensation section of the gravity heat pipe heat exchanger 3 to exchange heat with the outdoor fresh air filtered by the coarse filter 2. When the fresh air is preheated, the process of recovering the waste heat in the return air is realized. The preheated air enters the heating unit and exchanges heat with the heat exchange coil 22. The temperature after heat exchange can reach the indoor heating demand, and is finally sent to the area requiring heating by the fan array of the blower 16.

At the same time, when the unit is used in winter, the first circulating water pump 10 and the second circulating water pump 11 of the indirect evaporative cooling unit and the cold mist unit do not work, and neither the first water distributor 28 nor the second water distributor 30 sprays At the same time, the water in the first water supply pipe 8 and the second water supply pipe 12 should be drained to prevent the pipes from freezing and cracking in winter; when using in winter, the sealing performance of the indirect evaporative cooling unit and the cold mist unit of the riser should be strengthened to prevent unnecessary heat loss.

Water System Workflow

(1) Workflow of the water system of the riser indirect evaporative cooling unit

The circulating water in the first circulating water tank 6 is sprayed by the first circulating water pump 10 through the first water supply pipe 8 and finally by the first water distributor 28 . In the secondary flow channel of the evaporative cooler 26, the water film in the pipe of the standpipe is formed more uniformly, which helps the secondary air to exchange heat and moisture in the pipe, thereby improving the heat exchange efficiency of the indirect standpipe evaporative cooler.

(2) Workflow of cooling mist unit water system

The circulating water in the second circulating water tank 13 is passed through the second water supply pipe 12 by the second circulating water pump 11 and finally passes through the second water distributor 30 to form water mist, so that the air cooled by the indirect evaporative cooling unit of the standpipe and the cold mist unit The formed cold mist exchanges heat and moisture, thereby cooling the air.

(3) Workflow of heating unit water system

After the municipal heating hot water passes through the second valve 25, the third water supply pipe 21 finally enters the heat exchange coil 22 to exchange heat with the preheated air. Valve 24 returns to the return side of the municipal heating.

Through the above method, the utility model is a heat recovery type evaporative cooling air processing unit, which can reuse the waste energy in the return air recovered from the return air side of the evaporative cooling ventilation and air conditioning system to improve the utilization efficiency of energy.

Claims (9)

1. a kind of recovery type heat evaporates cooling air processor group, which is characterized in that including machine unit shell (1), the unit shell Be respectively set once air inlet (20) and air outlet (19) on the opposite side wall of body (1), an air inlet (20) with give Low efficient filter (2), heat recovery units, heating unit, standpipe are disposed with according to the flow direction of fresh air in air port (19) Indirect evaporating-cooling unit, harl unit and blowing unit.

2. a kind of recovery type heat according to claim 1 evaporates cooling air processor group, which is characterized in that described primary There are two air inlet (20) settings, and two air inlets (20) are separately positioned on the side of the machine unit shell one on the other On wall, and the first air-valve (17) are provided at each air inlet (20).

3. a kind of recovery type heat according to claim 1 evaporates cooling air processor group, which is characterized in that the heat is returned Unit, that is, gravity type heat pipe heat exchanger (3) is received successively to be arranged by way of in-line arrangement by the identical gravity type heat pipe tube bank of multiple calibers It arranges.

4. a kind of recovery type heat according to claim 1 evaporates cooling air processor group, which is characterized in that the heat supply Unit includes third water supplying pipe (21), and one end of the third water supplying pipe (21) is connected with heat exchange coil (22), the heat exchange plate The other end of pipe (22) is connected with return pipe (23), is provided with the first valve (24) on the return pipe (23), and the third supplies The other end of water pipe (21) is provided with the second valve (25).

5. a kind of recovery type heat according to claim 4 evaporates cooling air processor group, which is characterized in that the heat exchange It is additionally provided with below coil pipe (22) the first axial flow blower (4), also sets up the second air-valve on the bottom surface side wall of the machine unit shell (5), and second air-valve (5) is located at the underface of first axial flow blower (4).

6. a kind of recovery type heat according to claim 1 evaporates cooling air processor group, which is characterized in that the standpipe Indirect evaporating-cooling unit include the first circulation water tank (6) set gradually from bottom to up, standpipe indirect evaporation cooler (26), Current equalizer (27), the first water distributor (28) and the second axial flow blower (29), second axial flow blower (29) are located at the machine On the lateral wall of group shell, it is provided with the first water supplying pipe (8) on the first circulation water tank (6), on first water supplying pipe (8) It is disposed with first circulation water pump (10) and valve (9), and the other end of first water supplying pipe (8) and first water distribution Device (28) connects, and is additionally provided with single layer blinds air inlet (7), and the single layer blinds air inlet on the side wall of the machine unit shell (7) between the standpipe indirect evaporation cooler (26) and first circulation water tank (6).

7. a kind of recovery type heat according to claim 1 evaporates cooling air processor group, which is characterized in that the harl Unit includes the second circulation water tank (13) and the second water distributor (30) set gradually from bottom to up, second water distributor (30) Bottom and the second circulation water tank (13) between connect by the second water supplying pipe (12), and be equipped on the second water supplying pipe (12) Second circulation water pump (11).

8. a kind of recovery type heat according to claim 7 evaporates cooling air processor group, which is characterized in that the harl It is additionally provided between unit and blowing unit water fender (14), the top of the water fender (14) is fixed in the machine unit shell On wall, the other end of the water fender (14) is provided with deflector (15), and the other end of the deflector (15) gos deep into described Two-cycle case (13).

9. a kind of recovery type heat according to claim 1 evaporates cooling air processor group, which is characterized in that the air-supply Unit is the pressure fan array of multiple pressure fan (16) composition, and there are three pressure fan (16) settings, and from top to bottom successively Parallel arrangement, the air outlet (19) are additionally provided with third air-valve (18).