CN202403360U - Gas type rotating wheel and evaporative cooling and mechanical refrigerating combined air conditioner - Google Patents

Abstract

The air conditioner combined with gas-type rotor, evaporative cooling and mechanical refrigeration includes the fresh air channel and the return air channel arranged in parallel up and down in the unit. In the fresh air channel, fresh air outlet, primary filter a, and rotary heat exchanger are arranged in sequence. Fresh air side, dew point indirect evaporative cooler, direct evaporative cooler a, water baffle a, refrigerant direct expansion air cooler, natural gas reheater, blower fan and air outlet; return air outlets are arranged in sequence in the return air passage b. Primary filter b, compressor, direct evaporative cooler b, water baffle b, return air side of rotary heat exchanger, condenser, exhaust fan and air outlet. A set of air conditioners in the utility model has three functions of heat recovery, evaporative cooling, and cooling and dehumidification. It adopts two-stage indirect evaporative cooling pre-cooling treatment, plus a return air system, which reduces the load of fresh air and improves the efficiency of the unit. , Energy consumption is reduced, and power consumption is greatly reduced.

Description

Combination air conditioner with gas type runner, evaporative cooling and mechanical refrigeration

technical field

The utility model belongs to the technical field of air conditioning and refrigeration, and in particular relates to an air conditioner combined with a gas type runner, evaporative cooling and mechanical refrigeration.

Background technique

As one of the main energy consumption of buildings, the air conditioning system has been paid more and more attention to its energy saving and economy. Discharging the heat of the air-conditioned room into the atmosphere not only causes heat pollution in the city, but also wastes heat energy in vain. If the fresh air is pre-treated with the residual cold and heat in the exhaust air, the energy required to process the fresh air can be reduced and the unit load can be reduced.

On the other hand, indoor air quality (IAQ) is also getting more and more attention. Using the exhaust air heat recovery device, the cold heat in the exhaust air is used to pretreat the fresh air, which can increase the indoor fresh air while saving energy, and improve the indoor air quality.

In addition, natural gas resources can be fully and effectively utilized and concentrated in air-conditioning units to provide heating for users, greatly reducing power consumption.

It is an effective way to save energy by using the exhaust air heat recovery device to recover the cold heat in the exhaust air. Evaporative cooling is also an environmentally friendly, efficient and economical cooling method: it has lower cooling equipment costs, can greatly reduce electricity consumption and the demand for electricity during peak periods of electricity consumption, and can reduce greenhouse gas and CFC emissions. Therefore, evaporative cooling technology can be widely used in comfort cooling in residential buildings and public buildings, and can improve the comfort of workers in traditional industrial fields such as textile mills, flour mills, casting workshops, power plants and other industrial buildings. Evaporative cooling can reduce the dry bulb temperature and provide a more comfortable environment for the occupants.

Make full use of natural gas resources, expand the application fields of heat recovery device and evaporative cooling technology, reduce the equipment footprint, improve the stability and reliability of equipment operation, combine evaporative cooling technology with heat recovery technology and mechanical refrigeration technology Organically combining the advantages of several technologies, it has obvious energy-saving advantages over traditional refrigeration and air-conditioning units, effectively shortening the running time of refrigeration units, reducing operation and maintenance costs, thereby reducing system energy consumption.

Contents of the invention

The purpose of this utility model is to provide an air conditioner combined with gas type runner, evaporative cooling and mechanical refrigeration, which organically combines evaporative cooling technology with heat recovery technology and mechanical refrigeration technology, which has obvious energy-saving advantages and reduces system energy consumption.

The technical scheme adopted by the utility model is that the air conditioner combined with the gas type runner, evaporative cooling and mechanical refrigeration includes the fresh air channel and the return air channel arranged in parallel up and down in the unit, and the rotary heat exchanger is vertically arranged in the fresh air Between the channel and the return air channel, in the fresh air channel, there are fresh air outlets, primary filter a, fresh air side of the rotary heat exchanger, dew point indirect evaporative cooler, direct evaporative cooler a, Water baffle a, refrigerant direct expansion air cooler, natural gas reheater, blower fan and air supply outlet; in the return air passage, there are return air outlet b, primary filter b, compressor, Direct evaporative cooler b, water baffle b, return air side of rotary heat exchanger, condenser, exhaust fan and air outlet, refrigerant direct expansion air cooler, compressor and condenser are connected in sequence to form a closed circuit .

The utility model is also characterized in that,

A bypass valve is provided behind the fresh air side of the rotary heat exchanger.

Between the dew-point indirect evaporative cooler and the direct evaporative cooler a, and between the fresh air passage and the return air passage, the shell wall is provided with a return air outlet a passing through the two passages.

A four-way reversing valve is arranged on the compressor, and a throttling valve is arranged between the refrigerant direct expansion air cooler and the condenser.

The structure of the rotary heat exchanger: including the rotary wheel set in the box, the middle part of the rotary wheel is provided with a partition plate, and the partition plate divides the rotary wheel into the fresh air side of the rotary heat exchanger and the rotary heat exchanger On the air return side, a sealing strip is arranged on the runner, and a transmission belt is arranged around the runner, and the transmission belt is connected with the transmission device fixed on the inner wall of the box.

The air conditioner of the utility model organically combines the heat recovery device, 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 dehumidification, and adopts a two-stage indirect evaporative cooling preheating Cold treatment, coupled with a return air system, reduces the load of fresh air, greatly improves the efficiency of the unit, reduces energy consumption, and makes full use of the natural gas reheater for heating in winter, greatly reducing the power consumption of the unit.

Description of drawings

Fig. 1 is the structural representation of a kind of embodiment of air conditioner of the present invention;

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

In the figure, 1 fresh air outlet, 2 primary filter a, 3 rotary heat exchanger, 4 bypass valve, 5 dew point indirect evaporative cooler, 6 return air outlet a, 7 direct evaporative cooler a, 8 water retaining Plate a, 9 Refrigerant direct expansion air cooler, 10 Natural gas reheater, 11 Blower fan, 12 Air supply port, 13 Return air port b, 14 Primary filter b, 15 Four-way reversing valve, 16 Compressor, 17 Direct evaporative cooler b, 18 secondary fan, 19 water baffle b, 20 condenser, 21 exhaust fan, 22 exhaust outlet, 23 fresh air side of rotary heat exchanger, 24 sealing strip, 25 transmission, 26 transmission Belt, 27 partition plates, 28 rotary heat exchanger return air side, 29 boxes.

Detailed ways

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

As shown in Figure 1, the air conditioner combined with gas type runner, evaporative cooling and mechanical refrigeration of the present utility model adopts the composite structure of heat recovery device, evaporative cooling device and mechanical refrigeration device to realize equal wet cooling and cooling of air. wet.

Including the fresh air channel and the return air channel arranged in parallel up and down in the unit, the rotary heat exchanger 3 is vertically arranged between the fresh air channel and the return air channel. In the fresh air channel, set fresh air outlet 1, primary filter a2, rotary heat exchanger fresh air side 23, and bypass valve 4 behind the rotary heat exchanger fresh air side 23 according to the direction of fresh air entering, and dew point indirect evaporation Cooler 5, direct evaporative cooler a7, water baffle a8, refrigerant direct expansion air cooler 9, natural gas reheater 10, blower fan 11 and air outlet 12; in the return air channel, set them in sequence according to the direction of return air entry Air return port b13, primary filter b14, compressor 16, direct evaporative cooler b17, water baffle plate b19, rotary heat exchanger return air side 28, condenser 20, exhaust fan 21 and air outlet 22, dew point Between the type indirect evaporative cooler 5 and the direct evaporative cooler a7, and between the fresh air passage and the return air passage, a return air outlet a6 is provided on the shell wall that runs through the two passages. The refrigerant direct expansion air cooler 9, the compressor 16 and the condenser 20 are connected in sequence to form a closed circuit. A four-way reversing valve 15 is arranged on the compressor 16 , and a throttle valve is arranged between the refrigerant direct expansion air cooler 9 and the condenser 20 .

The fresh air side 23 of the rotary heat exchanger and the primary filter a2 arranged in front of it, and the blower 11 arranged behind the fresh air side 23 of the rotary heat exchanger form a cooling device; Primary filter b14, four-way reversing valve 15, compressor 16, direct evaporative cooler b17, water baffle b19, and condenser 20 and exhaust fan 21 set behind the return air side 28 of the rotary heat exchanger Heat recovery device; refrigerant direct expansion air cooler 9 is a mechanical refrigeration device.

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, and has the characteristics of self-purification. Fig. 2 has provided the structural schematic diagram of the vertical arrangement of the rotary heat exchanger 3, including the runner arranged in the box 29, the middle part of the runner is provided with a partition plate 27, and the partition plate 27 divides the runner into rotating wheels. The fresh air side 23 of the wheel heat exchanger and the return air side 28 of the wheel heat exchanger, a sealing strip 24 is arranged on the wheel, and a transmission belt 26 is arranged around the wheel, and the transmission belt 26 and the transmission device fixed on the inner wall of the box body 29 25 connected. Vertical arrangement, 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 and is 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 utility model adopts a wheel-type 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 utility model air conditioner adopts a rotary heat exchanger, which can fully utilize the energy of the indoor return air; and a direct evaporative cooler is installed behind the return air side 28 of the rotary heat exchanger to cool the return air, Therefore, the temperature difference between the fresh air and the return air of the rotary heat exchanger is increased, thereby increasing the heat exchange effect of the rotary heat exchanger.

The channel between the fresh air side 23 of the rotary heat exchanger and the blower 12 is provided with a dew point indirect evaporative cooler 5, a return air outlet a6, a direct evaporative cooler a7, a refrigerant direct expansion air cooler 9 and natural gas reheating device 10. Using two-stage indirect evaporative coolers to pre-cool the fresh air, and using part of the indoor return air to mix with the fresh air greatly reduces the fresh air load; in summer, the refrigerant direct expansion air cooler 9 is used to cool and dehumidify; in winter, direct evaporation is used The cooler plays the role of humidification, and the natural gas reheater 10 is used for heating, which has high comprehensive energy utilization efficiency.

A bypass valve 4 is installed behind the fresh air side 23 of the rotary heat exchanger, so that the outdoor fresh air can be utilized as much as possible in the transition season, and the quality of the indoor air can be effectively improved.

After the direct evaporative cooler a7, the water baffle a8 is used, and after the direct evaporative cooler b17, the water baffle b19 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 working principle of the utility model air conditioner:

The working process of outdoor fresh air treatment in summer: the outdoor fresh air passes through the primary effect filter a2 to filter the dust, then passes through the fresh air side 23 of the rotary heat exchanger, performs the first-stage isohumidity cooling treatment, and then passes through the dew point indirect evaporative cooler 5 , carry out the second-level equal-humidity cooling treatment, and then mix with part of the indoor return air and pass through the refrigerant direct expansion air cooler 9 for cooling and dehumidification treatment, and finally send the treated air into the room through the blower 11.

The working process of outdoor fresh air treatment in the transitional season: After the outdoor fresh air passes through the primary filter a2 to filter the dust, it passes through the fresh air side 23 of the rotary heat exchanger for the first-stage isohumidity cooling treatment, and then passes through the dew point indirect evaporative cooler 5. Carry out the second-level equal-humidity cooling treatment, then go through the direct evaporative cooler a7 cooling and humidification treatment, and finally send the treated air into the room by the blower 11;

The working process of indoor return air treatment in summer and transitional seasons: the return air passes through the primary filter b14 and the direct evaporative cooler b17 to filter dust while reducing the temperature of the return air, and passes through the rotary heat exchanger for heat and mass exchange on the return air side Finally, the heat-absorbing air is finally discharged to the outside by the exhaust fan 21. the

The working process of outdoor fresh air treatment in winter: the outdoor fresh air passes through the primary effect filter a2 to filter the dust, then passes through the fresh air side 23 of the rotary heat exchanger, performs isohumidity and temperature rise treatment, and then mixes with the indoor return air, and passes through the direct evaporative cooler a7 Cooling and humidification treatment, and then heat treatment by natural gas reheater 10 to the point of air supply, and finally the air after treatment is sent into the room by blower 11;

The working process of indoor return air treatment in winter: the return air passes through the primary filter b14, and then passes through the heat and mass exchange on the return air side 28 of the rotary heat exchanger, and finally the exhaust fan 21 discharges the heat-absorbed air to the outside.

Claims (5)

1. gas type runner and evaporative cooling, the compound air conditioner of mechanical refrigeration; It is characterized in that; Comprise the new wind passage and the return air channel that laterally arrange up and down in the unit; Thermal wheel (3) is vertical to be arranged between new wind passage and the return air channel, in the said new wind passage, be disposed with fresh wind port (1), roughing efficiency air filter a (2), the new wind side of thermal wheel (23), dew point formula indirect evaporation cooler (5), direct evaporative cooler a (7), water fender a (8), cold-producing medium direct expansion formula aerial cooler (9), natural gas reheater (10), pressure fan (11) and air outlet (12) by new wind approach axis; In the said return air channel, be disposed with return air inlet b (13), roughing efficiency air filter b (14), compressor (16), direct evaporative cooler b (17), water fender b (19), thermal wheel return side (28), condenser (20), exhaust blower (21) and exhaust outlet (22) by the return air approach axis, described cold-producing medium direct expansion formula aerial cooler (9), compressor (16) and condenser (20) connect and compose the closed-loop path successively.

2. according to the described air conditioner of claim 1, it is characterized in that the rear of the new wind side of said thermal wheel (23) is provided with by-passing valve (4).

3. according to the described air conditioner of claim 1, it is characterized in that the housing wall between said dew point formula indirect evaporation cooler (5) and the direct evaporative cooler a (7), between new wind passage and return air channel is provided with the return air inlet a (6) that connects two passages.

4. according to the described air conditioner of claim 1, it is characterized in that said compressor (16) is provided with four-way change-over valve (15), be provided with choke valve between described cold-producing medium direct expansion formula aerial cooler (9) and the condenser (20).

5. according to the described air conditioner of claim 1; It is characterized in that; The structure of said thermal wheel (3): comprise the runner that is arranged in the casing (29); The middle part of said runner is provided with demarcation strip (27), and demarcation strip (27) is divided into new wind side of thermal wheel (23) and thermal wheel return side (28) with runner, and runner is provided with sealing strip (24); Be provided with driving belt (26) around runner, driving belt (26) is connected with the transmission device (25) that is fixed in casing (29) inwall.

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