CN201715666U - Air-conditioning box with sensible heat recovery function - Google Patents

Abstract

An air conditioning box with a sensible heat recovery function, the air conditioning box includes a box body, an air inlet, a fan, a surface heat exchanger, a first air outlet, a first outlet damper, a sensible heat exchanger, a vent, a second Air outlet and second outlet damper. The box is divided into four cavities by two partitions, and the sensible heat exchanger is located at the intersection of the two partitions. When the air needs to be reheated after being cooled and dehumidified, the air is pre-cooled through the hot air channel of the sensible heat exchanger after entering the air conditioning box, and then cooled and dehumidified through the surface heat exchanger, and the dehumidified air passes through the sensible heat exchanger The cold air channel and the air to be treated are sent out after sensible heat exchange. By adjusting the two outlet air valves, the outlet air temperature can also be controlled. With one of the dampers closed, the air conditioner can perform the normal air cooling process. The utility model can not only realize the conventional air cooling processing flow, but also realize the sensible heat exchange precooling of the air to be processed and the free reheating flow of the dehumidified air, thereby reducing the processing energy consumption.

Description

Air conditioner with sensible heat recovery

technical field

The utility model relates to an air-conditioning box, in particular to an air-conditioning box with a sensible heat recovery function, which can be applied to industrial air-conditioning systems or comfort air-conditioning systems that require high air temperature and humidity throughout the year, and belongs to refrigeration and air-conditioning equipment field.

Background technique

In recent years, with the increasing shortage of energy and the aggravation of environmental pollution, energy conservation and environmental protection have become increasingly important issues. Among all energy consumption, the air-conditioning system used to maintain the temperature and humidity of the space consumes a large amount of high-grade energy, which accounts for a considerable proportion. Therefore, the energy saving of the air-conditioning system is becoming more and more important.

For air-conditioning objects that require high air supply temperature and humidity, the air often needs to be reheated after cooling and dehumidification because the temperature is too low. Currently, air-conditioning boxes and indoor variable air volume terminals use electricity or other high-temperature heat sources for reheating. The cooling load of the system also wastes high-grade energy. From the perspective of the air treatment process, for the air conditioning system, dehumidification requires a lower evaporation temperature, while the removal of sensible heat does not require a low evaporation temperature. In the current air treatment process, both sensible heat and latent heat are usually fully borne by the refrigeration system. The air-conditioning system has requirements for humidity. After the air is dehumidified, the temperature is low and it needs to be reheated. Reheating the air after it cools down is essentially cold and heat offset, which wastes cold energy and also wastes other high-grade energy (such as electric energy used for heating). Therefore, how to reduce the cooling load of the air-conditioning system and reduce the capacity of the air-conditioning system while reducing reheating energy consumption is of great significance to the energy saving of the air-conditioning system.

At present, air-conditioning systems with high temperature and humidity requirements are widely used in various fields, and the energy consumption of air-conditioning systems is increased due to the offset of cold and heat caused by reheating problems. Today, when energy is increasingly scarce and energy conservation is advocated, this considerable energy waste problem cannot be underestimated, and a proper solution is urgently needed.

Utility model content

Aiming at the problems existing in the prior art, the utility model proposes an air conditioning box with a sensible heat recovery function, which uses a sensible heat exchanger to precool and reheat the air to be treated, thereby reducing the cooling load of the refrigeration system and eliminating Or reduce the high-grade energy waste caused by reheating, which is conducive to the energy-saving operation of the air conditioning system.

The technical scheme of the utility model is as follows:

An air-conditioning box with sensible heat recovery function, the air-conditioning box includes a box body, an air inlet, a fan, a first heat exchanger, a first air outlet, a first outlet air valve, a sensible heat exchanger, a vent, a second Two air outlets, the second outlet air valve; the box is divided into four cavities by two partitions, the sensible heat exchanger is located at the intersection of the two partitions; the air inlet is set at On the first cavity of the air conditioning box; the fan is set in the first cavity of the air conditioning box; the first heat exchanger is set in the third cavity of the air conditioning box; the first air outlet is set in the In the second cavity of the air conditioning box; the second air outlet is arranged in the fourth cavity of the air conditioning box; the first cavity communicates with the third cavity through the hot air channel of the sensible heat exchanger; the The second cavity communicates with the fourth cavity through the cold air channel of the sensible heat exchanger; a vent is provided between the second cavity and the third cavity; a first outlet is provided on the first air outlet Air valve; the second air outlet is provided with a second outlet air valve.

In the above-mentioned air-conditioning box with sensible heat recovery function, a second heat exchanger with reheating function is provided between the cold air channel air outlet of the sensible heat exchanger and the second air outlet.

The above-mentioned air conditioning box with sensible heat recovery function also includes a filter section and a humidification section, the filter section is set at the air inlet end of the air conditioning box, and the humidification section is set at the air outlet end of the air conditioning box.

In the above-mentioned air-conditioning box with sensible heat recovery function, the sensible heat exchanger is a plate heat exchanger, a shell-and-tube heat exchanger or a heat pipe heat exchanger.

In the above-mentioned air conditioning box with sensible heat recovery function, the first heat exchanger and the second heat exchanger are refrigerant-air heat exchangers, water-air heat exchangers or a combination of both.

Compared with the prior art, the utility model has the following advantages and outstanding effects: the utility model, through a reasonable improvement to the original technology, adds a sensible heat exchange function on the basis of retaining the original function of the air conditioning box, and through the sensible heat exchange Precool the air to be treated and reheat the dehumidified air, thereby reducing the cooling load of the refrigeration system and eliminating or reducing high-grade energy waste caused by reheating, which is conducive to the energy-saving operation of the air conditioning system. The utility model is especially suitable for an industrial air-conditioning system or a comfortable air-conditioning system that requires high air temperature and humidity throughout the year, and has the advantages of energy saving and reliability.

Description of drawings

Fig. 1 is a schematic diagram of the structure and principle of Embodiment 1 of "an air-conditioning box with sensible heat recovery function" disclosed by the utility model and a schematic diagram of the first operating mode.

Fig. 2 is a schematic diagram of the air treatment process in operation mode 1 in the first embodiment of "an air-conditioning box with sensible heat recovery function" disclosed by the utility model.

Fig. 3 is a schematic diagram of the principle of operation mode 2 in the first embodiment of "an air-conditioning box with sensible heat recovery function" disclosed by the utility model.

Fig. 4 is a schematic diagram of the principle of operation mode 3 in the first embodiment of "an air-conditioning box with sensible heat recovery function" disclosed by the utility model.

Fig. 5 is a structural principle diagram of Embodiment 2 of "an air-conditioning box with sensible heat recovery function" disclosed in the utility model.

In the figure: 1-air inlet; 2-fan; 3-sensible heat exchanger; 4-first heat exchanger; 5-air vent; 6-first air outlet; 7-first outlet damper; 8- The second air outlet; 9-the second outlet air valve; 10-the second heat exchanger; 11-the box; 12-the first cavity; 13-the second cavity; 14-the third cavity; 15-the first Four chambers.

Detailed ways

Embodiment one

Referring to Fig. 1, Fig. 1 is a schematic structural diagram of Embodiment 1 of "an air-conditioning box with sensible heat recovery function" disclosed in the utility model, which includes a box body 11, an air inlet 1, a fan 2, and a first heat exchanger 4. The first air outlet 6, the first outlet air valve 7, the sensible heat exchanger 3, the air outlet 5, the second air outlet 8, and the second outlet air valve 9; the box 11 is surrounded by two partitions Divided into four cavities, the sensible heat exchanger 3 is located at the intersection of two partitions; the air inlet 1 is set on the first cavity 12 of the air conditioning box; the fan 2 is set on the air conditioner In the first cavity 12 of the box; the first heat exchanger 4 is arranged in the third cavity 14 of the air conditioning box; the first air outlet 6 is arranged in the second cavity 13 of the air conditioning box; The second air outlet 8 is arranged in the fourth cavity 15 of the air-conditioning box; the first cavity 12 and the third cavity 14 communicate through the hot air channel of the sensible heat exchanger; the second cavity The body 13 and the fourth cavity 15 communicate through the cold air channel of the sensible heat exchanger 3; a vent 5 is provided between the second cavity 13 and the third cavity 14; the first air outlet 6 is provided with There is a first outlet damper 7; the second outlet 8 is provided with a second outlet damper 9.

The air conditioning box also includes a filtering section and a humidifying section, the filtering section is set at the air inlet end of the air conditioning box, and the humidifying section is set at the air outlet end of the air conditioning box.

The sensible heat exchanger 3 is a plate heat exchanger, a shell-and-tube heat exchanger or a heat pipe heat exchanger.

The first heat exchanger 4 is a refrigerant-air heat exchanger, a water-air heat exchanger or a combination of both.

(1) Operation mode one

Referring to Fig. 1 and Fig. 2, in this operation mode, the first outlet air valve 7 is closed, and the second outlet air valve 9 is opened. At this time, the air enters the air conditioning box from the air inlet 1, which is shown on the psychrometric diagram. At this time, the air The state point is O1, passing through the inlet of the hot air channel of the sensible heat exchanger 3, the air to be treated performs sensible heat exchange with the dehumidified air in the cold air channel of the sensible heat exchanger 3, and the hot air is precooled, the state The point is O2, the pre-cooled air is cooled and dehumidified through the first heat exchanger 4, at this time the state point is L, and then passes through the cold air passage of the sensible heat exchanger 3 again to realize sensible heat recovery and reheating, etc. The humidity content rises, the state point becomes S, and then it is sent out of the air conditioning box through the second air outlet 8; while in the traditional air treatment method, the air is processed from the state point O1 to the state point L through the first heat exchanger 4, Then, after reheating, it is heated from the state point L to the air supply state point S. This process not only increases the processing load of the first heat exchanger 4, but also requires reheating, resulting in the offset of cold and heat.

(2) Operation mode 2

Referring to Fig. 3, Fig. 3 is a schematic diagram of the principle of operation mode 2 in the first embodiment of "an air-conditioning box with sensible heat recovery function" disclosed in the utility model.

In this operation mode, both the first outlet air valve 7 and the second outlet air valve 9 are opened, at this time the air enters the air conditioning box from the air inlet, is pre-cooled through the sensible heat exchanger, and then a part of the air passes through the air outlet 6 to be cooled. Another part of the air is reheated through the sensible heat exchanger 3, and then sent out from the air outlet 8. Adjusting the opening of the first outlet air valve and the second outlet air valve can realize the mixing of two streams of air and adjust the outlet air temperature.

(3) Operation mode three

Referring to Fig. 4, Fig. 4 is a schematic diagram of the principle of operation mode 3 in the first embodiment of "an air-conditioning box with sensible heat recovery function" disclosed in the utility model.

In this operation mode, the first outlet air valve 7 is opened, and the second outlet air valve 9 is closed. At this time, the air enters the air conditioning box from the air inlet, passes through the sensible heat exchanger, and then is sent out through the air outlet 6, realizing ordinary Air condensation dehumidification process.

Embodiment two

Referring to Fig. 5, Fig. 5 is a schematic structural diagram of Embodiment 2 of "an air-conditioning box with sensible heat recovery function" disclosed by the utility model. The air flow process in this figure is the same as that in Fig. Add a heat exchanger 10 with reheating function. The medium in the heat exchanger 10 is refrigerant or hot water or other heating medium, which can be heated by waste heat, condensation heat or other heat sources.

The operation mode of the second embodiment is similar to that of the first embodiment, and will not be repeated here.

Claims (5)

1. An air conditioning box with sensible heat recovery function, characterized in that: the air conditioning box includes a box body (11), an air inlet (1), a fan (2), a first heat exchanger (4), a first outlet tuyere (6), first outlet air valve (7), sensible heat exchanger (3), air vent (5), second air outlet (8), second outlet air valve (9); the box The body (11) is divided into four cavities by two partitions, and the sensible heat exchanger (3) is located at the intersection of the two partitions; the air inlet (1) is arranged at the first On the cavity (12); the fan (2) is arranged in the first cavity of the air-conditioning box; the first heat exchanger (4) is arranged in the third cavity (14) of the air-conditioning box; the The first air outlet (6) is arranged in the second cavity (13) of the air conditioning box; the second air outlet (8) is arranged in the fourth cavity (15) of the air conditioning box; A cavity (12) communicates with the third cavity (14) through the hot air channel of the sensible heat exchanger; the second cavity (13) and the fourth cavity (15) pass through the sensible heat exchanger ( 3) The cold air channel is connected; a vent (5) is provided between the second cavity (13) and the third cavity (14); the first air outlet (6) is provided with a first outlet air Valve (7); the second air outlet (8) is provided with a second outlet air valve (9). 2. An air conditioning box with sensible heat recovery function according to claim 1, characterized in that: the cold air channel air outlet and the second air outlet (8) of the sensible heat exchanger (3) A second heat exchanger (10) with reheating function is arranged between them. 3. An air-conditioning box with sensible heat recovery function according to claim 1 or 2, characterized in that: the air-conditioning box also includes a filter section and a humidifying section, and the filter section is arranged in the air-conditioning box The air inlet end of the air conditioner, and the humidification section is set at the air outlet end of the air conditioning box. 4. An air-conditioning box with sensible heat recovery function according to claim 1 or 2, characterized in that: the sensible heat exchanger (3) is a plate heat exchanger, a shell-and-tube heat exchanger or heat pipe heat exchangers. 5. An air conditioning box with sensible heat recovery function according to claim 1 or 2, characterized in that: the first heat exchanger (4) and the second heat exchanger (10) are refrigerant- Air heat exchanger, water-air heat exchanger or a combination of both.

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