CN102287885A - Double-rotating-wheel type evaporative-cooling and mechanical-refrigerating composite air-conditioner set with automatic dust-absorbing function - Google Patents

Abstract

The invention relates to a double-rotating-wheel type evaporative-cooling and mechanical-refrigerating composite air-conditioner set with an automatic dust-absorbing function, which comprises an air-supplying passage and an air-returning passage, wherein the air-supplying passage and the air-returning passage are arranged in parallel in a set shell, and a fresh-air opening, a disk filter, a first rotating-wheel type heat exchanger, a second rotating-wheel type heat exchanger, a rotating packed-type evaporative cooler, a surface-type heat exchanger, a water-blocking plate a, a blower and an air-supplying opening are sequentially arranged in the air-supplying passage along the direction of fresh-air entrance; and an air-returning opening b, a filtering net, a direct evaporative cooler a, a water-blocking plate b, a second rotating-wheel type heat exchanger, a direct evaporative cooler b, a water-blocking plate c, a first rotating-wheel type heat exchanger, an exhaust fan and an exhaust opening are sequentially arranged in the air-returning passage along the direction of return-air entrance. A heat-recovering device, an evaporative-cooling device and a mechanical-refrigerating device are organically combined by the air-conditioner set disclosed by the invention, so that a set of device has three functions of heat recovery, evaporative cooling and cooling dehumidification; and since a primary-return-air system is also adopted, the load of fresh air is deceased, so that the efficiency of the set is greatly improved.

Description

Double-rotor evaporative cooling and mechanical refrigeration composite air conditioning unit with automatic dust collection

technical field

The invention belongs to the technical field of air-conditioning and refrigeration, and relates to a cooler suitable for an air-conditioning system, in particular to a double-wheel evaporative cooling and mechanical refrigeration composite air-conditioning unit with automatic dust collection.

Background technique

In today's era of energy shortage and resource scarcity, energy saving and environmental protection have become the themes of sustainable development. Air conditioning is one of the main energy consumption of buildings. How to save energy from air conditioning is an urgent problem that needs to be faced. The significant energy-saving effect of heat recovery air conditioners has attracted more and more attention from industry scholars, which is inseparable from its own characteristics and advantages; and the heat exchange wheel was originally manufactured to recover waste heat, such as from schools, small restaurants, theaters Used, smelly, or oxygen-deficient air from hundreds of other types of buildings can be used to preheat the fresh air; stale air is exhausted from one side of the rotor, while filtered outdoor air is sucked in from the other side and absorbed by the former. Heating, otherwise, this part of the heat will be wasted. the

Evaporative cooling air-conditioning technology is an energy-saving, environmentally friendly and sustainable air-conditioning technology. It has been widely used in Northwest my country, especially in Xinjiang; but like any air-conditioning technology, evaporative cooling air-conditioning technology is not perfect. In the southern regions with high humidity, such as Guangdong and Fujian, because its use effect is greatly limited by the wet bulb temperature, most of them are used for ventilation and cooling in factories.

In order to expand the application fields of these two technologies, reduce the space occupied by the equipment, and improve the stability and reliability of its equipment operation, the evaporative cooling technology is organically combined with the heat recovery technology and the mechanical refrigeration technology. Compared with traditional refrigeration and air-conditioning units, it has obvious energy-saving advantages, which can effectively shorten the running time of refrigeration units, reduce operation and maintenance costs, and thus reduce system energy consumption.

Contents of the invention

The object of the present invention is to provide a double-rotor evaporative cooling and mechanical refrigeration combined air conditioning unit with automatic dust collection, which has obvious energy-saving advantages and reduces system energy consumption.

The technical scheme adopted in the present invention is that the double-rotor evaporative cooling and mechanical refrigeration composite air-conditioning unit with automatic dust suction includes an air supply channel and a return air channel arranged in parallel in the unit casing, and the first rotor heat exchanger and the second rotary heat exchanger are arranged in the air supply channel and the return air channel, the fresh air sides of the first rotary heat exchanger and the second rotary heat exchanger are arranged in the air supply channel, and the first rotary The return air side of the wheel heat exchanger and the second wheel heat exchanger is set in the return air channel, and in the air supply channel, there are fresh air outlets, disc filters, and the first wheel in order according to the direction of fresh air intake. Type heat exchanger, second wheel heat exchanger, rotary packing evaporative cooler, surface heat exchanger, water baffle a, blower and air outlet, second wheel heat exchanger and rotary packing evaporator There is also a return air outlet a on the wall of the unit shell between the coolers; in the return air channel, there are return air outlet b, filter screen, direct evaporative cooler a, water baffle b, the second Second wheel heat exchanger, direct evaporative cooler b, water baffle c, first wheel heat exchanger, exhaust fan and air outlet.

The present invention is also characterized in that,

Wherein the first rotary wheel heat exchanger is provided with a partition plate between the fresh air side and the return air side, and a sealing strip is provided on the rotary wheel.

A partition plate is provided between the fresh air side and the return air side of the second rotary wheel heat exchanger, and a sealing strip is provided on the rotary wheel.

Compared with the existing evaporative cooling air-conditioning unit, the composite air-conditioning unit of the present invention has the following characteristics:

(1) Apply the wheel heat recovery device to the evaporative cooler of the air conditioner to replace the plate-fin heat exchanger currently used, greatly improving the heat exchange efficiency, the efficiency can be as high as 80%, and reducing the operating energy consumption.

(2) The heat recovery device is organically combined with the evaporative cooling device and the mechanical refrigeration device, so that a set of devices has three functions of heat recovery, evaporative cooling, and cooling and dehumidification, so as to achieve cooling and dehumidification in summer and heat recovery in winter.

(3) Combine two-stage indirect evaporative cooling with mechanical refrigeration to lower the temperature of the air conditioner by more than 10°C and improve cooling efficiency.

(4) In winter, the outdoor fresh air can be preheated to increase the temperature of the outdoor fresh air by about 10°C, which improves the heat exchange efficiency.

(5) Due to the addition of a direct evaporative cooler, the device has the functions of humidification and purification.

(6) A water baffle is set to prevent water droplets from entering the return air side runner and transferring to the fresh air side of the runner, thereby increasing the moisture content of the fresh air.

Description of drawings

Fig. 1 is the structural representation of composite air conditioning unit of the present invention;

Fig. 2 is a structural schematic diagram of the rotary heat exchanger in the composite air conditioner unit of the present invention.

In the figure, 1. Fresh air outlet, 2. Disc filter, 3. The first rotary heat exchanger, 4. The second rotary heat exchanger, 5. Return air outlet a, 6. Rotary packing type evaporative cooling 7. Surface heat exchanger, 8. Water baffle a, 9. Blower fan, 10. Air supply outlet, 11. Return air outlet b, 12. Filter, 13. Direct evaporative cooler a, 14. Water baffle b, 15. Direct evaporative cooler b, 16. Water baffle c, 17. Exhaust fan, 18. Air outlet, 19. Fresh air side of rotary heat exchanger, 20. Sealing strip, 21. Transmission device, 22. Transmission belt, 23. Partition plate, 24. Return air side of rotary heat exchanger, 25. Box body.

Detailed ways

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

The double-rotor evaporative cooling and mechanical refrigeration compound air conditioning unit with automatic dust suction of the present invention adopts a composite structure of a heat recovery device, an evaporative cooling device and a mechanical refrigeration device, and adopts a rotary heat exchanger. The structure is shown in Figure 1, including the air supply channel and the return air channel arranged in parallel in the unit shell, the first rotary heat exchanger 3 and the second rotary heat exchanger 4 are arranged in the air supply channel and the return air channel Among them, the fresh air side 19 of the first rotary heat exchanger 3 and the second rotary heat exchanger 4 is arranged in the air supply channel, and the first rotary heat exchanger 3 and the second rotary heat exchanger The return air side 24 of 4 is arranged in the return air channel. In the air supply channel, fresh air outlet 1, disc filter 2, first rotary heat exchanger 3, second rotary heat exchanger 4, rotary packing evaporative cooler 6, The surface heat exchanger 7, the water baffle a8, the air blower 9 and the air outlet 10, the return air outlet a5 is set on the unit shell wall between the second wheel heat exchanger 4 and the rotary packing evaporative cooler 6; In the air passage, return air outlet b11, filter screen 12, direct evaporative cooler a13, water baffle b14, second rotary heat exchanger 4, direct evaporative cooler b15, and water baffle are arranged in sequence according to the return air inlet direction c16, the first rotary heat exchanger 3, the exhaust fan 17 and the exhaust outlet 18.

The runner is a heat exchanger with high heat recovery efficiency. It realizes heat transfer through the continuous rotation of the internal circular packing. It has a large specific surface area, high heat exchange efficiency, large air volume range and good integrity. Flexible layout, good heat transfer stability, controllable heat recovery efficiency, exhaust air and fresh air alternately flow through the runner in reverse, with self-cleaning effect and other characteristics. The structure of the rotary heat exchanger disclosed by the present invention is shown in Fig. 2. It consists of the fresh air side 19 of the rotary heat exchanger, the sealing strip 20, the transmission device 21, the transmission belt 22, the partition plate 23, the rotary The return air side 24 of the heat exchanger is composed of a box body 25. A partition plate 23 is arranged between the fresh air side and the return air side of the first rotary heat exchanger 3 and the second rotary heat exchanger 4. A sealing strip 20 is arranged on it. Fig. 2 shows the structural diagram of the rotary heat exchanger 3 and the vertical arrangement, the rotary heat exchanger 3 or 4 is placed in the box 25, and the transmission device 21 and the transmission belt fixed on the box wall 22 drives the heat exchanger to rotate, and the sealing strip 20 is arranged on the runner, arranged vertically, with reasonable layout and more compact structure. The rotary heat exchanger does not need to be arranged centrally, which is more convenient and simple than conventional heat exchangers, and can run continuously for a long time, and the layout of the rotary heat exchanger is flexible. When the indoor exhaust air with low temperature (high temperature) passes through the exhaust air side, the core material is cooled (heated) (equal humidity cooling/heating), and at the next moment, the core material is cooled (heated) just after being in contact with the exhaust air. The material is then transferred to the fresh air area to be in contact with the incoming fresh air. As a result, the high-temperature (low-temperature) fresh air can be cooled (heated), that is, pre-cooled (heated) before other heat and humidity treatments, so as to meet the requirements of cold recovery in summer and heat recovery in winter. The invention adopts the wheel heat exchanger to replace the existing plate-fin heat exchanger, and has the characteristics of high heat recovery efficiency, small flow resistance and remarkable energy-saving effect.

The invention adopts the compound structure of the heat recovery device, the evaporative cooling device and the mechanical refrigeration device, and can realize isohumid cooling, cooling and dehumidification of the air.

Arrange return air outlet a5, rotary packing evaporative cooler 6, and surface heat exchanger 7 in the channel of the fresh air side 19 of the second rotary heat exchanger; the primary return air system is used in winter and summer, reducing the load of fresh air In summer, the low-temperature surface cooler is used to cool and dehumidify, and in winter, the direct evaporative cooler is used to humidify.

After the direct evaporative cooler a13, the water baffle b14 is used, and after the direct evaporative cooler b15, the water baffle c16 is used to control the problem of water flow, so as to prevent water droplets from entering the return air side runner and transferring to the fresh air side of the runner, thereby increasing the fresh air flow moisture content.

The fresh air filter in the structure of the present invention adopts a disc filter 2. When the outdoor air flows through the disc mesh surface, the impurities are blocked on the mesh surface, and the blower utilizes the rotating suction nozzle to suck out the impurities remaining on the mesh surface. Impurities can filter the dust in the air, and protect the fresh air side of the runner from dust, so as to improve the heat exchange efficiency of the heat exchanger and prolong its service life; while the return air filter only uses the filter screen 12 for preliminary filtration, Because a direct evaporative cooler is installed behind the two rotary heat exchangers, the direct evaporative cooler not only plays a cooling role, but also is a very good wet filter.

The working principle of the air conditioner unit of the present invention is: after the outdoor fresh air passes through the disc filter 2 to filter the dust, it passes through the fresh air side of the first rotary heat exchanger 3 to perform the first-stage equal-humidity cooling treatment, and then passes through the second rotary The fresh air side of the wheel heat exchanger 4 is subjected to second-stage equal-humidity cooling treatment, and then mixed with part of the indoor return air and passed through the surface heat exchanger 7 for cooling and dehumidification treatment, and finally the treated air is sent into the indoor. The indoor return air passes through the filter screen 12 and the direct evaporative cooler a13 to filter dust while reducing the temperature of the return air. After heat and mass exchange on the return air side of the second rotary heat exchanger 4, it passes through the direct evaporative cooler b15. The temperature of the heated return air is lowered, and after heat and mass exchange on the return air side of the first rotary heat exchanger 3 , the heat-absorbed air is finally exhausted to the outside by the exhaust fan 17 . The fresh air side of the rotary heat exchanger and the return air side of the rotary heat exchanger have opposite effects during winter and summer operation, so as to preheat the outdoor fresh air and achieve the purpose of heat recovery.

Claims (3)

1. be with the twin-runner type evaporative cooling and the mechanical refrigeration combined air conditioner unit of automatic dust absorption, it is characterized in that, comprise the air-supply passage and the return air channel that be arranged in parallel in the machine unit shell, first thermal wheel (3) and second thermal wheel (4) are arranged in air-supply passage and the return air channel, the new wind side (19) of first thermal wheel (3) and second thermal wheel (4) is arranged in the air-supply passage, the return side (24) of first thermal wheel (3) and second thermal wheel (4) is arranged in the return air channel, in the described air-supply passage, be disposed with fresh wind port (1) by new wind air intake direction, disk filter (2), first thermal wheel (3), second thermal wheel (4), rotation material filling type devaporizer (6), surface-type heat exchanger (7), water fender a(8), pressure fan (9) and air outlet (10) also are provided with return air inlet a(5 on the machine unit shell wall between described second thermal wheel (4) and the rotation material filling type devaporizer (6)); In the described return air channel, be disposed with return air inlet b(11 by return air air intake direction), screen pack (12), direct evaporative cooler a(13), water fender b(14), second thermal wheel (4), direct evaporative cooler b(15), water fender c(16), first thermal wheel (3), exhaust blower (17) and exhaust outlet (18).

2. according to the described combined air conditioner unit of claim 1, it is characterized in that be provided with demarcation strip (23) between the new wind side of described first thermal wheel (3) and the return side, runner is provided with sealing strip (20).

3. according to claim 1 or 2 described combined air conditioner units, it is characterized in that be provided with demarcation strip (23) between the new wind side of described second thermal wheel (4) and the return side, runner is provided with sealing strip (20).

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