CN201203217Y - A four-stage evaporative cooling combined air conditioning unit - Google Patents

Abstract

The utility model discloses a four-stage evaporative cooling combined air conditioner unit. In the casing, a preliminary filter section, a heat pipe indirect evaporative cooler, a tube-type indirect evaporative cooler, and a return air mixing section are arranged in sequence according to the air inlet direction. , surface cooler, direct evaporative cooler, heater and fan, and the surface cooler communicates with the mechanical refrigeration system outside the casing. The four-stage evaporative cooling combined air conditioner unit of the utility model has a simple structure, realizes indoor exhaust air cooling/heat recovery throughout the year, uses evaporative cooling technology for free cooling in spring and autumn transitional seasons, and has low refrigeration costs, is economical and environmentally friendly. It can meet the year-round air-conditioning requirements of dry areas in my country, and also meet the year-round air-conditioning requirements of medium-humidity and high-humidity areas in my country.

Description

A four-stage evaporative cooling combined air conditioning unit

technical field

The utility model belongs to the technical field of air-conditioning and refrigeration, and relates to an air-conditioning unit, in particular to an air-conditioning unit combined by heat pipe indirect evaporative cooling, tube-type indirect evaporative cooling, mechanical refrigeration and direct evaporative cooling.

Background technique

Evaporative cooling technology is an environmentally friendly and efficient way to obtain cold energy through the heat and moisture exchange between water and air by using renewable energy such as dry air and natural moisture, with the help of the difference between the dry bulb temperature and the dew point temperature in the ambient air. Efficient cooling method. The three-stage evaporative cooling air conditioner manufactured by this technology has the advantages of energy saving, economy, environmental protection and improvement of indoor air quality. However, the evaporative cooling air conditioner has the disadvantages of limited cooling range, incapable of dehumidification, and is not suitable for use in high-humidity and medium-humidity areas.

The air-conditioning system using purely mechanical refrigeration is expensive and consumes a lot of energy. With the increase of usage time, the cost of power consumption, repair and update of equipment after damage continues to rise, resulting in high operating costs. Moreover, the refrigerants CFC _S and HCFC working fluids used in mechanical refrigeration have a destructive effect on the atmospheric ozone layer and further aggravate the greenhouse effect.

Contents of the invention

The purpose of this utility model is to provide a four-stage evaporative cooling combined air conditioning unit, which combines heat pipe indirect evaporative cooling, tube indirect evaporative cooling, mechanical refrigeration, direct evaporative cooling and heating into an air conditioning unit, which can not only increase the cooling range, And it can remove the moisture contained in the air, suitable for use in areas with medium and high humidity.

The technical solution adopted by the utility model is a four-stage evaporative cooling combined air conditioner unit. In the casing, an initial effect filter section, a heat pipe indirect evaporative cooler, and a tube-type indirect evaporative cooler are arranged in sequence according to the air inlet direction. , return air mixing section, surface cooler, direct evaporative cooler, heater and fan, and the surface cooler communicates with the mechanical refrigeration system outside the casing.

The utility model is also characterized in that,

The heat pipe indirect evaporative cooler includes the primary side of the heat pipe indirect evaporative cooling section and the secondary side of the heat pipe indirect evaporative cooling section arranged in sequence from bottom to top.

The secondary side of the indirect evaporative cooling section of the heat pipe is provided with a spray circulating water device.

The condenser used in the mechanical refrigeration system is an evaporative condenser.

The heat exchange tube of the tubular indirect evaporative cooler is inserted with a metal helix, and the tube is covered with hydrophilic aluminum foil.

Compared with traditional evaporative cooling air-conditioning units and combined air-conditioning units, the air-conditioning unit of the utility model has the following characteristics:

1) The three-stage evaporative cooling air conditioner currently used in dry areas cannot dehumidify, and is not suitable for application in my country's medium and high humidity areas. The air conditioner unit of the utility model uses a combination of evaporative cooling and mechanical refrigeration to achieve the purpose of dehumidification , and then the evaporative cooling air-conditioning technology has been popularized and applied in my country's medium-humidity and high-humidity areas.

2) The air conditioning unit of the present utility model adopts the indirect evaporative cooling section of the heat pipe provided with the spray circulating water device on the secondary side to recover the cold/heat of the indoor exhaust air. The fresh air is pre-cooled in summer, and the indoor exhaust air is used as secondary air to perform two-stage preheating treatment on the fresh air in winter by using the indirect evaporative cooling section of the heat pipe or the indirect evaporative cooling section of the tube without spraying circulating water. Comply with the regulations that large air volume combined air conditioners must be equipped with cold and heat recovery.

3) The air-conditioning unit of the present utility model is equipped with an indirect evaporative cooling section of the pipe-inserted helical wire pipe coated with a hygroscopic material hydrophilic aluminum foil ellipse and a secondary grid-distributed water pipe type, which effectively avoids the plate-fin tube type currently used. The phenomenon of fouling and low heat transfer efficiency of heat exchangers in the indirect evaporative cooling section improves the efficiency of tubular heat exchangers.

4) The surface cooling section of the air-conditioning unit of the utility model passes the low-temperature cold water produced by mechanical refrigeration in hot seasons to achieve the purpose of cooling and dehumidification. Among them, the condenser of the mechanical refrigeration system is an evaporative condenser, which has good cooling effect, saves water, greatly improves the COP value of the mechanical refrigeration system, and has high refrigeration efficiency and energy saving. In most spring and autumn transitional seasons, the mechanical refrigeration is not turned on, and the surface cooling section passes high-temperature cold water (free cooling) produced by the cooling tower to process the air.

5) The direct evaporative cooling section of the air-conditioning unit of the utility model can perform cooling treatment well in spring and autumn transitional seasons, and can perform humidification treatment in winter, and is also a very good air purification device.

Description of drawings

Fig. 1 is a schematic structural view of the combined air conditioner unit of the present invention; wherein, a is the front view, b is the view along the A-A line in the main view, c is the view along the C-C line in the main view, and d is the view along the B-B line in the main view Rotated view of the line;

Fig. 2 is a structural schematic diagram of the heat exchange tube of the tube-type indirect evaporative cooler of the present invention.

In the figure, 1. primary effect filter section, 2. heat pipe indirect evaporative cooler, 3. tubular indirect evaporative cooler, 4. surface cooler, 5. direct evaporative cooler, 6. heater, 7. fan, 8 . Return air mixing section, 9. Secondary side of heat pipe indirect evaporative cooling section, 10. Primary side of heat pipe indirect evaporative cooling section, 11. Tube type indirect evaporative cooler heat exchange tube, 12. Metal spiral, 13. Aluminum foil.

Detailed ways

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

The four-stage evaporative cooling combined air conditioner unit of the utility model takes heat pipe indirect evaporative cooling, tubular indirect evaporative cooling, mechanical refrigeration and direct evaporative cooling technology as the core, and combines the heat pipe indirect evaporative cooling The surface cooling section, the direct evaporative cooling section, the primary filter section, the heating section and the fan section form a four-stage evaporative cooling combined air conditioning unit.

Its structure is shown in Figure 1, which includes primary filter section 1, heat pipe indirect evaporative cooler 2, tubular indirect evaporative cooler 3, return air mixing section 8, surface cooler 4, direct Evaporative cooler 5, heater 6 and fan 7.

The heat pipe indirect evaporative cooler 2 adopts the secondary side spray circulating water structure, which is used for cooling/heat recovery of the indoor exhaust air, pre-cooling the fresh air in summer, and cooling the indoor exhaust air in winter without spraying circulating water. It is used as secondary air, and performs two-stage preheating treatment on fresh air. Among them, the primary side 10 of the indirect evaporative cooling section of the heat pipe is used for outdoor fresh air; the secondary side 9 of the indirect evaporative cooling section of the heat pipe is used for summer and spring and autumn transitional seasons, for indoor exhaust air or outdoor fresh air and spraying circulating water, and for indoor exhaust air in winter. Wind does not spray circulating water.

The heat exchange tube of the tubular indirect evaporative cooler 3 is inserted with a helix, and the tube is covered with a hydrophilic aluminum foil elliptical tube and a secondary mesh for water distribution. Fresh air or indoor exhaust air is used as secondary air and sprayed with circulating water. In winter, indoor exhaust air is used as secondary air without spraying circulating water.

The surface cooler 4 is used for cooling and dehumidifying the air with the low-temperature cold water produced by mechanical refrigeration in summer; in the spring and autumn transitional season, when the mechanical refrigeration is not turned on, the surface cooler 4 is used for the high-temperature cold water produced by the cooling tower (free cooling), for Air is processed.

The direct evaporative cooler 5 is used to cool the air in the spring and autumn transitional seasons, and to humidify the air in winter, and it is also a good air purification device.

The heater 6 is used for reheating the preheated air.

The characteristic of the combined air conditioner unit of the utility model is to achieve the purpose of dehumidification, and then make the evaporative cooling air conditioner technology be applied in the middle humidity and high humidity areas.

The working process of the utility model combined air conditioner unit:

In the hot summer season, start the fan, and the outdoor air enters the primary effect filter section 1 for primary effect filtration. The filtered air enters the heat pipe indirect evaporative cooler 2 for pre-cooling, and the pre-cooled air enters the tube-type indirect evaporative cooler 3 Carry out secondary pre-cooling, the air that has been pre-cooled twice enters the return air mixing section 8, and is mixed with the return air in the return air mixing section 8 to form a mixed gas, which enters the surface cooler 4 and is Cool and dehumidify in 4, then enter fan 7, the air after cooling and dehumidification will be sent out of the air conditioning unit by fan 7, and sent into the room.

In the spring and autumn transition season, start the fan, and the outdoor air enters the primary effect filter section 1 for filtration, and the filtered air enters the heat pipe indirect evaporative cooler 2 for pre-cooling, and then the pre-cooled air or enters the tube-type indirect evaporative cooler 3 Perform secondary precooling, or enter the return air mixing section 8, and mix with the return air in the return air mixing section 8. The air that has been processed twice enters the direct evaporative cooler 5 for cooling, and the cooled air enters the fan 7, and the fan 7 sends the purified and cooled air out of the air-conditioning unit to send air to the room.

In the cold winter season, start the fan, and the outdoor air enters the primary filter section 1 for filtering, and the filtered air either enters the heat pipe indirect evaporative cooler 2 for preheating, or enters the tube indirect evaporative cooler 3 for preheating. The purified and preheated air enters the return air section 8, and is mixed with the return air in the return air mixing section 8 to form a mixed gas, which enters the direct evaporative cooler 5 for humidification treatment, and the humidified mixed gas enters Heater 6 carries out reheat treatment, after that, enters blower fan 7, is sent into indoor by blower fan 7, and indoor is carried out air supply.

The combined air conditioner unit of the utility model adopts the heat pipe indirect evaporative cooler 2 to pre-cool or preheat the fresh air by using the indoor exhaust air, and simultaneously adopts different tube-type indirect evaporative coolers 3, surface coolers 4 and direct evaporative coolers 5 The combined section processes the fresh air. Heat pipe indirect evaporative cooler 2, tube indirect evaporative cooler 3 and surface cooler 4 are used to process air in summer; heat pipe indirect evaporative cooler 2, or tube indirect evaporative cooler 3 and direct evaporative cooler are used in spring and autumn transitional seasons 5. The air is processed. In winter, the heat pipe indirect evaporative cooler 2, or the tube-type indirect evaporative cooler 3, the direct evaporative cooler 5 and the heater 6 are used to treat the air.

Make full use of the heat pipe indirect evaporative cooler 2 for air cold/heat recovery and the energy-saving effect of "free cooling" of the tube indirect evaporative cooler 3. According to changes in outdoor weather conditions and indoor load, it can be used alone or in combination with mechanical refrigeration. The building is air conditioned. Realize the cold/heat recovery of the indoor exhaust air throughout the year, avoid the high cost and high energy consumption caused by the mechanical refrigeration of the air conditioning system throughout the year, reduce the cost of cooling equipment and power consumption, and reduce the demand for power during peak periods of power consumption. Greenhouse gas and CFC emissions, and suitable for medium and high humidity areas.

Claims (5)

1. level Four evaporative cooling assembled air-conditioner unit, it is characterized in that, in casing, be disposed with initial effect filtering section (1), heat pipe indirect evaporation cooler (2), tube type indirect evaporative cooler (3), return air mixer (8), surface cooler (4), direct evaporative cooler (5), heater (6) and blower fan (7) by the air intake direction, described surface cooler (4) communicates with casing mechanical refrigeration system outward.

2. according to the described level Four evaporative cooling of claim 1 assembled air-conditioner unit, it is characterized in that described heat pipe indirect evaporation cooler (2) comprises heat pipe indirect evaporation cooling section primary side (10) and the heat pipe indirect evaporation cooling section secondary side (9) that sets gradually from bottom to top.

3. according to the described level Four evaporative cooling of claim 2 assembled air-conditioner unit, it is characterized in that described heat pipe indirect evaporation cooling section secondary side (9) is provided with the spray circulating water device.

4. according to the described level Four evaporative cooling of claim 1 assembled air-conditioner unit, it is characterized in that the condenser that uses in the described mechanical refrigeration system is selected evaporative condenser for use.

5. according to the described level Four evaporative cooling of claim 1 assembled air-conditioner unit, it is characterized in that, be inserted with wire spiral (12) in the heat exchanger tube of described tube type indirect evaporative cooler (11), the outer hydrophilic aluminium foil (13) that coats of pipe.

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