CN219607254U

CN219607254U - Air conditioning device

Info

Publication number: CN219607254U
Application number: CN202320730486.9U
Authority: CN
Inventors: 祖坎; 都学敏; 黄信博; 秦颂; 王征; 张恒
Original assignee: Qingdao Hisense Hitachi Air Conditioning System Co Ltd
Current assignee: Qingdao Hisense Hitachi Air Conditioning System Co Ltd
Priority date: 2023-04-04
Filing date: 2023-04-04
Publication date: 2023-08-29
Anticipated expiration: 2033-04-04

Abstract

The utility model discloses an air conditioning device, and belongs to the technical field of air treatment. The air conditioning device includes: the first heat exchanger is positioned in the indoor air duct, and the second heat exchanger is positioned in the outdoor air duct; the carbon dioxide removal rotating wheel is provided with a carbon dioxide adsorbent and is rotatably connected to the air outlet side of the heat exchanger assembly and used for adsorbing and desorbing carbon dioxide in the flowing air; when the first heat exchanger is used as an evaporator and the second heat exchanger is used as a condenser, indoor air is cooled in an indoor air duct through the evaporator, and then carbon dioxide is adsorbed by a carbon dioxide removing rotating wheel and is circulated into the room; the fresh air is heated in the outdoor air duct through the condenser, and then the carbon dioxide absorbed by the carbon dioxide removal rotating wheel is separated and circulated outdoors. The air conditioning device can actively adsorb carbon dioxide, and greatly reduces the requirement for outdoor fresh air while meeting the low-concentration requirement for indoor carbon dioxide.

Description

Air conditioning device

Technical Field

The utility model relates to the technical field of air treatment, in particular to an air conditioning device.

Background

With the improvement of the air tightness requirement of the building, people stay indoors for a long time, which inevitably leads to indoor CO ₂ The concentration rises rapidly, and when the concentration is more than 1000ppm, the human body has uncomfortable feeling, so fresh air is usually introduced to dilute the indoor CO ₂ Concentration, keep air fresh. However, the fresh air is input and simultaneously brings outdoor heat and humidity load, so that the current fresh air system mainly aims at the treatment of the heat and humidity load of the fresh air, and finally the indoor CO can be realized ₂ And (5) adjusting the concentration. Fresh air is introduced to dilute indoor CO ₂ The mode of concentration level requires larger fresh air quantity, and thus the energy consumption of the system is increased.

Disclosure of Invention

The utility model provides an air conditioning device which can actively adsorb carbon dioxide, and greatly reduces the requirement for outdoor fresh air while meeting the requirement for low concentration of indoor carbon dioxide.

An air conditioning apparatus comprising: the casing is provided with an outdoor air duct and an indoor air duct; the heat exchanger assembly comprises a first heat exchanger and a second heat exchanger, the first heat exchanger is positioned in the indoor air duct, and the second heat exchanger is positioned in the outdoor air duct; the carbon dioxide removal rotating wheel is provided with a carbon dioxide adsorbent, is rotatably connected in the shell and is positioned at the air outlet side of the heat exchanger assembly, and is provided with a desorption area positioned in the outdoor air duct and an adsorption area positioned in the indoor air duct, and is used for adsorbing and desorbing carbon dioxide in the flowing air; when the first heat exchanger is used as an evaporator and the second heat exchanger is used as a condenser, indoor air is ventilated in the indoor air duct, so that the indoor air is cooled in the indoor air duct through the evaporator, and then carbon dioxide is adsorbed by the carbon dioxide removing rotating wheel and is circulated into the room; through ventilating the fresh air in the outdoor air duct, the fresh air is heated in the outdoor air duct through the condenser, and then carbon dioxide absorbed by the carbon dioxide removal rotating wheel is separated and circulated outdoors.

In some embodiments, further comprising: the dehumidifying rotating wheel is provided with a moisture adsorption material, is rotatably connected in the shell and is positioned between the heat exchanger component and the carbon dioxide removing rotating wheel, one part of the dehumidifying rotating wheel is positioned in the outdoor air duct, and the other part of the dehumidifying rotating wheel is positioned in the indoor air duct and is used for adsorbing and desorbing moisture in air flowing through.

In some embodiments, a first closing plate is provided between the periphery of the desiccant wheel and the inner wall of the housing; further comprises: the first outdoor air door is arranged on the first sealing plate and positioned in the outdoor air duct; the first indoor air door is arranged on the first sealing plate and positioned in the indoor air duct.

In some embodiments, in the indoor air duct, the dehumidifying rotor and the first heat exchanger are separated into an indoor bypass channel and an indoor humidifying channel, the indoor bypass channel is positioned on the outer ring of the indoor humidifying channel, and the dehumidifying rotor corresponds to the indoor humidifying channel; further comprises: the first indoor air door is arranged on the indoor bypass channel and is used for communicating or blocking the indoor bypass channel; the indoor humidity-adjusting air door is arranged on the indoor humidity-adjusting channel and is used for communicating or blocking the indoor humidity-adjusting channel; when the first indoor air door is opened and the indoor humidity control air door is closed, indoor air flows from the indoor bypass channel to the adsorption area.

In some embodiments, in the outdoor air duct, the dehumidifying rotor and the second heat exchanger are separated into an outdoor bypass channel and an outdoor humidifying channel, the outdoor bypass channel is positioned at the outer ring of the outdoor humidifying channel, and the dehumidifying rotor corresponds to the outdoor humidifying channel; further comprises: the first outdoor air door is arranged on the outdoor bypass channel and is used for communicating or blocking the outdoor bypass channel; the outdoor humidity-regulating air door is arranged on the outdoor humidity-regulating channel and is used for communicating or blocking the outdoor humidity-regulating channel; when the first outdoor air door is opened and the outdoor humidity regulating air door is closed, fresh air flows to the desorption area from the outdoor bypass channel.

In some embodiments, a second closure plate is provided between the periphery of the carbon dioxide removal wheel and the inner wall of the housing; further comprises: the second outdoor air door is arranged on the second sealing plate and positioned in the outdoor air duct; the second indoor air door is arranged on the second sealing plate and positioned in the indoor air duct.

In some embodiments, the second closure plate is inclined from the inner ring to the outer ring, towards the windward side.

In some embodiments, a wind mixing air door is arranged between the indoor air duct and the outdoor air duct and is used for communicating the indoor air duct with the outdoor air duct; the air mixing door is positioned on the windward side of the heat exchanger component;

when the air mixing door is opened, part of fresh air in the outdoor air duct enters the indoor air duct through the air mixing door and is mixed with indoor air to enter a room.

In some embodiments, further comprising: the refrigerant circulation system is provided with a compressor, a four-way valve, a second heat exchanger, an expansion valve and a first heat exchanger; the refrigerant circulation system further includes: the third heat exchanger is arranged in the indoor air duct and positioned at the air outlet side of the carbon dioxide removal rotating wheel; the output end of the compressor is connected with a first interface of the four-way valve, a second interface of the four-way valve is connected with a second heat exchanger, the second heat exchanger is sequentially connected with an expansion valve, the first heat exchanger and a first stop valve in series and then is connected with a third interface of the four-way valve, and a fourth interface of the four-way valve is connected with the input end of the compressor; the branch circuit formed by the third heat exchanger and the second stop valve which are connected in series is connected in parallel to the two ends of the first stop valve.

In some embodiments, further comprising: the outdoor fan is arranged in the outdoor air duct and used for driving fresh air to flow; the indoor fan is arranged in the indoor air duct and used for driving indoor air to flow.

Drawings

Fig. 1 shows a schematic view of an air conditioning apparatus according to a first embodiment;

fig. 2 shows a schematic view of an air conditioning device according to a second embodiment;

fig. 3 shows a schematic view of an air conditioning device according to a third embodiment;

fig. 4 shows a schematic view of an air conditioning device according to a fourth embodiment;

FIG. 5 illustrates a psychrometric chart of an air conditioning device in an internal circulation cooling mode according to some embodiments;

FIG. 6 illustrates a psychrometric chart of an air conditioning device in an internal circulation cooling humidity control mode in accordance with some embodiments;

FIG. 7 illustrates a psychrometric chart of an air conditioning device in a semi-external circulation cooling mode according to some embodiments;

FIG. 8 illustrates a psychrometric chart of an air conditioning device in a semi-external circulation cooling humidity control mode in accordance with some embodiments;

in the above figures, 1, a casing; 11. an indoor wind inlet; 12. an indoor air outlet; 13. a fresh air inlet; 14. a fresh air outlet; 15. an indoor air duct; 16. an outdoor air duct; 171. a first closure plate; 172. a second closure plate; 181. an indoor bypass passage; 182. an indoor humidity-adjusting channel; 183. an outdoor bypass passage; 184. an outdoor humidity conditioning channel; 21. a first heat exchanger; 22. a second heat exchanger; 23. a compressor; 24. a four-way valve; 25. an expansion valve; 26. a third heat exchanger; 27. a first stop valve; 28. a second shut-off valve; 3. a carbon dioxide removal wheel; 31. an adsorption zone; 32. a desorption zone; 4. an indoor fan; 5. an outdoor fan; 6. a dehumidifying wheel; 7. a mixing damper; 81. a first outdoor damper; 82. a first indoor damper; 83. indoor humidity-regulating air door; 84. outdoor humidity-adjusting air door; 85. a second outdoor damper; 86. and a second indoor damper.

Detailed Description

For the purposes of making the objects and embodiments of the present utility model more apparent, an exemplary embodiment of the present utility model will be described in detail below with reference to the accompanying drawings in which exemplary embodiments of the present utility model are illustrated, it being apparent that the exemplary embodiments described are only some, but not all, of the embodiments of the present utility model.

In the description of the present utility model, it should be understood that the orientations or positional relationships indicated by the terms "center", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc., are based on the orientations or positional relationships shown in the drawings, are merely for convenience in describing the present utility model and simplifying the description, and do not indicate or imply that the device or element being referred to must have a specific orientation, be configured and operated in a specific orientation, and therefore should not be construed as limiting the present utility model.

The terms "first", "second" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defining "a first", "a second" or the like may include one or more such features, either explicitly or implicitly. In the description of the present utility model, unless otherwise indicated, the meaning of "a plurality" is two or more.

In the description of the present utility model, it should be noted that, unless explicitly specified and limited otherwise, the terms "mounted," "connected," and "connected" are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; can be directly connected or indirectly connected through an intermediate medium, and can be communication between two elements. The specific meaning of the above terms in the present utility model will be understood in specific cases by those of ordinary skill in the art.

Embodiments of the present utility model will be described in detail below with reference to the accompanying drawings.

Referring to fig. 1, an air conditioning apparatus according to an embodiment of the present utility model includes a cabinet 1, a refrigerant circulation system, and a carbon dioxide removal wheel 3.

The casing 1 is rectangular parallelepiped and forms a general appearance of the air conditioning apparatus. An indoor air inlet 11, an indoor air outlet 12, a fresh air inlet 13 and a fresh air outlet 14 are arranged on the side wall of the shell 1; wherein, the indoor air inlet 11 and the indoor air outlet 12 are communicated to form an indoor air channel 15, and the fresh air inlet 13 and the fresh air outlet 14 are communicated to form an outdoor air channel 16.

When the air conditioning device is used in a lifting mode, the indoor air inlet 11 and the indoor air outlet 1 can be connected to the indoor through air pipes respectively, and the fresh air inlet 13 and the fresh air outlet 14 can be connected to the outdoor through the air pipes respectively.

The refrigerant circulation system includes a compressor 23, a four-way valve 24, a second heat exchanger 22, an expansion valve 25, and a first heat exchanger 21.

The output end of the compressor 23, the first interface of the four-way valve 24, the second heat exchanger 22, the expansion valve 25, the first heat exchanger 21, the third interface of the four-way valve 24, the fourth interface of the four-way valve 24, and the input end of the compressor 23 are sequentially connected in series to form a loop.

The refrigerant circulation system is used for realizing the refrigerating/heating function, and the principle is the same as that of the refrigerant circulation system of the air conditioner, and is not repeated here.

The first heat exchanger 21 is provided in the indoor air duct 15, and the second heat exchanger 22 is provided in the outdoor air duct 16. When the first heat exchanger 21 is used as an evaporator, the second heat exchanger 22 is used as a condenser, and when the first heat exchanger 21 is used as a condenser, the second heat exchanger 22 is used as an evaporator.

Typically, the first heat exchanger 21 and the second heat exchanger 22 are adjacent, and for convenience of the following description, a combination of the first heat exchanger 21 and the second heat exchanger 22 is referred to as a heat exchanger assembly.

The air conditioning device further includes an indoor fan 4 and an outdoor fan 5. The indoor fan 4 can be arranged in the indoor air duct 15 corresponding to the indoor air outlet 12 and is used for driving indoor air to flow; the outdoor fan 5 can be arranged in the outdoor air duct 16 corresponding to the fresh air outlet 14 and is used for driving fresh air to flow.

In other embodiments, the indoor fan 4 may also be disposed at the indoor air inlet 11, or the indoor fan 4 may be disposed in the middle of the indoor air duct 15; similarly, the outdoor fan 5 may be further disposed at the fresh air inlet 13, or the outdoor fan 5 may be disposed in the middle of the outdoor air duct 16.

The carbon dioxide removing rotary wheel 3 is provided with a carbon dioxide absorbent, is rotatably connected in the shell 1 and is positioned on the air outlet side of the heat exchanger assembly, and is used for absorbing and desorbing carbon dioxide in air flowing through the carbon dioxide removing rotary wheel.

The air outlet side of the heat exchanger assembly refers to the downstream of the heat exchanger assembly with reference to the flow direction of the air, and the opposite side is the windward side of the heat exchanger assembly, namely the upstream of the heat exchanger assembly.

One part of the carbon dioxide removal wheel 3 corresponds to the interior of the indoor air duct 15, and the other part corresponds to the interior of the outdoor air duct 16. The carbon dioxide removal wheel 3 is divided into at least an adsorption zone 31 and a desorption zone 32.

In performing the removal of carbon dioxide from the indoor air, the first heat exchanger 21 serves as an evaporator and the second heat exchanger 22 serves as a condenser.

Under the action of the indoor fan 4, indoor air enters the indoor air duct 15 from the indoor air inlet 11, passes through the evaporator and the adsorption area 31 of the carbon dioxide removal rotating wheel 3, and is circulated into the room from the indoor air outlet 12.

After the indoor air passes through the evaporator for enthalpy adjustment, the indoor air flows through the adsorption area 31, and the adsorption area 31 adsorbs carbon dioxide from the indoor air, so that the carbon dioxide in the indoor air is removed, and the carbon dioxide concentration of the indoor air is reduced;

under the action of the outdoor fan 5, fresh air enters the outdoor air duct 16 from the fresh air inlet 13, passes through the condenser and the desorption area 32 of the carbon dioxide removal rotating wheel 3, and is discharged to the outside from the fresh air outlet 14.

The fresh air is heated when passing through the condenser, and carbon dioxide absorbed by the carbon dioxide removal rotating wheel 3 is separated when flowing through the desorption region 32, and the carbon dioxide is discharged outdoors along with the fresh air, so that the absorbent of the carbon dioxide removal rotating wheel 3 is regenerated.

The adsorption area 31 is used for absorbing carbon dioxide, the desorption area 32 is used for removing carbon dioxide to regenerate the adsorbent, and the operation of the rotating wheel enables the adsorption area 31 and the desorption area 32 to be changed continuously, so that continuous adsorption and desorption of the adsorbent can be maintained.

The air conditioning device adopts the combination of the solid adsorption material and the traditional air conditioning system to independently treat the sensible heat load, the latent heat load and the carbon dioxide concentration, so that the requirement for outdoor fresh air can be greatly reduced, the carbon dioxide concentration is adjusted from the traditional forced exchange to achieve the purpose of dilution to the active adsorption removal, and the requirement for the outdoor fresh air is greatly reduced while the requirement for reducing the solubility of indoor carbon dioxide is met.

In some embodiments of the present utility model, the air conditioning apparatus may further include a dehumidifying rotor 6, wherein the dehumidifying rotor 6 is rotatably connected within the cabinet 1, and a moisture adsorbing material is provided thereon for humidifying or dehumidifying air.

The dehumidifying rotating wheel 6 can realize temperature swing adsorption, namely low-temperature moisture absorption and high-temperature moisture release, and simultaneously the first heat exchanger 21 and the second heat exchanger 22 in the refrigerant circulation system provide low-temperature and high-temperature environments for the dehumidifying rotating wheel 6.

The dehumidifying rotor 6 comprises at least a treatment zone and a regeneration zone; when dehumidification is carried out, the treatment area of the dehumidification runner 6 is positioned in the indoor air duct 15, the regeneration area is positioned in the outdoor air duct 16, and when the indoor air with higher relative humidity passes through the treatment area, the moisture is absorbed by the adsorption material to realize dehumidification;

when humidifying, the regeneration area of the dehumidifying runner 6 is positioned in the indoor air duct 15, the treatment area is positioned in the outdoor air duct 16, the moisture of fresh air is absorbed and recovered by the treatment area, and then the indoor air with lower relative humidity desorbs the moisture through the regeneration area, so that humidifying is realized. The rotating wheel rotates according to a preset rotating speed so as to form a repeated dehumidification or humidification treatment process.

According to an embodiment of the utility model, a dehumidifying rotor 6 is provided between the heat exchanger assembly and the carbon dioxide removal rotor 3. Indoor air sequentially passes through the first heat exchanger 21, the dehumidifying rotating wheel 6 and the carbon dioxide removing rotating wheel 3 in the indoor air channel 15; the fresh air sequentially passes through the second heat exchanger 22, the dehumidifying rotating wheel 6 and the carbon dioxide removing rotating wheel 3 in the outdoor air channel 16.

In some embodiments of the present utility model, the air conditioning apparatus may include a mixing damper 7, and the mixing damper 7 is disposed between the indoor air duct 15 and the outdoor air duct 16. When the mixing air door 7 is opened, the indoor air duct 15 and the outdoor air duct 16 can be communicated, so that part of fresh air can enter the indoor air duct 15 through the mixing air door 7 and then enter a room along with indoor air, and the aim of introducing a small amount of fresh air into the room is fulfilled.

Specifically, the mixing damper 7 is located on the windward side of the heat exchanger assembly, or the mixing damper 7 is located near the inlet of the housing 1. The opening degree of the mixing damper 7 can be adjusted, so that the fresh air intake can be controlled.

When the device works, most of fresh air circulates indoors from the outdoor air duct 16, and the small part enters the indoor air duct 15 from the position of the mixing air door 7, and enters the room after being mixed with indoor air.

When the indoor carbon dioxide solubility is high, the carbon dioxide concentration is reduced by adsorption by the carbon dioxide removal rotating wheel 3, and part of fresh air is properly introduced, so that the outdoor carbon dioxide reduction speed can be increased.

According to the utility model, under refrigeration working conditions, a plurality of working modes can be subdivided according to specific environments: internal circulation refrigeration, internal circulation refrigeration humidity control, semi-external circulation refrigeration and semi-external circulation refrigeration humidity control.

Specifically, an indoor inlet temperature and humidity sensor 91 may be disposed on the windward side of the first heat exchanger 21 for detecting the temperature and humidity of indoor air.

When T_in > T_set, the refrigerant circulation system is started according to the refrigeration mode. Wherein, T_in is the temperature value detected by the temperature and humidity sensor, and T_set is the indoor set temperature.

When RH_in > RH_set, the desiccant rotor 6 is operated, whereas the desiccant rotor 6 is not operated. Wherein RH_in is a humidity value detected by a temperature and humidity sensor, and RH_set is indoor set humidity.

A carbon dioxide concentration sensor may be provided on the windward side of the adsorption zone 31 for detecting the carbon dioxide solubility of the indoor air.

When Cin_co2 > Cset1_co2, the carbon dioxide removal rotating wheel 3 works, otherwise, the carbon dioxide removal rotating wheel 3 does not work; when cin_co2 > cset2_co2, the mixing damper 7 is opened. Wherein Cin_co2 is the detection value of a carbon dioxide concentration sensor, cset1_co2 and Cset2_co2 are the set values of indoor carbon dioxide concentration, and Cset1_co2 is less than Cset2_co2.

Internal circulation refrigeration

This mode is applicable to low indoor wet load and medium and low carbon dioxide concentration. Specifically, RH_in < RH_set, cset2_co2 > Cin_co2 > Cset1_co2.

In this mode, the desiccant rotor 6 is not in operation and the mixing damper 7 is closed. The carbon dioxide removal runner 3 works for removing carbon dioxide in indoor air.

The first heat exchanger 21 is an evaporator for reducing a part or a certain amount of sensible heat load (including heat of adsorption generated in adsorption), and the second heat exchanger 22 is a condenser for providing the heat of regeneration of the carbon dioxide removal rotor 3. The air conditioning apparatus may further include an outdoor inlet temperature and humidity sensor 92, an indoor outlet temperature and humidity sensor 93, and an outdoor outlet temperature and humidity sensor 94. The psychrometric chart in this mode can be detected by each sensor (fig. 5).

Indoor air duct 15: the indoor air is cooled by the evaporator firstly, then carbon dioxide is adsorbed by the carbon dioxide removing rotating wheel 3 and circulated into the room, so that the refrigeration of the indoor air and the reduction of the solubility of the carbon dioxide are realized.

Outdoor air duct 16: the fresh air is heated by the condenser firstly, then carbon dioxide adsorbed by the carbon dioxide removal rotating wheel 3 is separated and circulated outdoors, and the regeneration of the dioxide removal rotating wheel 3 is realized.

Internal circulation refrigeration humidity control

This mode is suitable for a certain heat and humidity load in a room, and carbon dioxide is at a medium and low level. Specifically, RH_in > RH_set, cset2_co2 > Cin_co2 > Cset1_co2.

In this mode, the mixing damper 7 is closed; the dehumidifying rotating wheel 6 works for dehumidifying; the carbon dioxide removal runner 3 works for removing carbon dioxide in indoor air.

The first heat exchanger 21 is an evaporator for reducing a part or a certain amount of sensible heat load (including heat of adsorption generated in adsorption), and the second heat exchanger 22 is a condenser for providing the heat of regeneration of the carbon dioxide removal rotor 3 and the desiccant rotor 6. The psychrometric chart in this mode can be detected by a temperature and humidity sensor (fig. 6).

Indoor air duct 15: the indoor air is cooled by the evaporator, then the moisture is adsorbed by the dehumidifying rotating wheel 6, and the carbon dioxide is adsorbed by the carbon dioxide removing rotating wheel 3 and then circulated into the room, so that the refrigerating, dehumidifying and the carbon dioxide solubility reduction of the indoor air are realized.

Outdoor air duct 16: the fresh air is heated by the condenser firstly, then the moisture absorbed by the dehumidifying rotating wheel 6 is separated, and the carbon dioxide absorbed by the carbon dioxide removing rotating wheel 3 is separated and circulated to the outdoor, so that the regeneration of the dehumidifying rotating wheel 6 and the dioxide removing rotating wheel 3 is realized.

Semi-external circulation refrigeration

This mode is applicable to conditions where the indoor wet load is low and the carbon dioxide solubility is at a high level. Specifically, RH_in < RH_set, cin_co2 > Cset2_co2.

In this mode, the desiccant wheel 6 is not in operation; the mixing damper 7 is opened; the carbon dioxide removal runner 3 works for removing carbon dioxide in indoor air.

The first heat exchanger 21 is an evaporator for reducing a part or a certain amount of sensible heat load (including heat of adsorption generated in adsorption), and the second heat exchanger 22 is a condenser for providing the heat of regeneration of the carbon dioxide removal rotor 3. The psychrometric chart in this mode can be detected by a temperature and humidity sensor (fig. 7).

Indoor air duct 15: the indoor air and part of fresh air are mixed and cooled by the evaporator, and then carbon dioxide is absorbed by the carbon dioxide removal rotating wheel 3 and circulated into the room, so that refrigeration and reduction of carbon dioxide solubility are realized.

Outdoor air duct 16: a small amount of fresh air enters an indoor air channel through a mixing air door 7, most of the fresh air is heated by a condenser, and then carbon dioxide adsorbed by the carbon dioxide removal rotating wheel 3 is separated and circulated outdoors, so that the regeneration of the dioxide removal rotating wheel 3 is realized.

Semi-external circulation refrigeration humidity control

This mode is suitable for a certain heat and humidity load in the room, and carbon dioxide is at a higher level. Specifically, RH in > RH_set, cin_co2 > Cset2_co2.

In this mode, the mixing damper 7 is opened; the dehumidifying rotating wheel 6 works for dehumidifying; the carbon dioxide removal runner 3 works for removing carbon dioxide in indoor air.

The first heat exchanger 21 is an evaporator for reducing a part or a certain amount of sensible heat load (including heat of adsorption generated in adsorption), and the second heat exchanger 22 is a condenser for providing the heat of regeneration of the carbon dioxide removal rotor 3 and the desiccant rotor 6. The psychrometric chart in this mode can be detected by a temperature and humidity sensor (fig. 8).

Indoor air duct 15: the indoor air and part of fresh air are mixed and cooled by the evaporator, then the moisture is adsorbed by the dehumidifying rotating wheel 6, and the carbon dioxide is adsorbed by the carbon dioxide removing rotating wheel 3 and then circulated into the room, so that the refrigeration, the dehumidification and the reduction of the solubility of the carbon dioxide are realized.

Outdoor air duct 16: a small amount of fresh air enters the indoor air duct 15 through the mixing air door 7, most of the fresh air is heated by the condenser, then the moisture adsorbed by the dehumidifying rotating wheel 6 is separated, the carbon dioxide adsorbed by the carbon dioxide removing rotating wheel 3 is separated and then circulated to the outdoor, and the regeneration of the dehumidifying rotating wheel 6 and the dioxide removing rotating wheel 3 is realized.

In some embodiments of the present utility model, referring to fig. 2, the refrigerant circulation system further includes a third heat exchanger 26, where the third heat exchanger 26 is disposed in the indoor air duct 15 and located at the air outlet side of the carbon dioxide removal wheel 3.

A first stop valve 27 is connected in series between the first heat exchanger 21 and the third interface of the four-way valve on the refrigerant circulation loop; the branch formed by the third heat exchanger 26 and the second stop valve 28 connected in series is connected in parallel to both ends of the first stop valve 27.

When the first shut-off valve 27 is on and the second shut-off valve 28 is off, the third heat exchanger 26 is inactive.

When the first shut-off valve 27 is opened and the second shut-off valve 28 is closed, the third heat exchanger 26 is connected in series in the refrigerant circulation circuit. Since the sensible heat load may be increased by the adsorption heat and the sensible heat load of the wheels from the regeneration zone when the air passes through the dehumidifying wheel 6 and/or the carbon dioxide removing wheel 3, the third heat exchanger 26 serves as a second evaporator for finally adjusting the sensible heat load of the indoor air to the desired supply condition, and the air adjusting efficiency of the apparatus can be improved.

According to an embodiment of the present utility model, the operation of the third evaporator 26 can potentially result in the evaporation temperature being below the dew point temperature with the risk of condensation. In order to avoid this problem, in the present utility model, an outlet temperature and humidity sensor is provided at the indoor air outlet 12 to detect the supply air temperature, and the on/off of the first and second shut-off valves 27 and 28 is controlled according to whether the supply air temperature satisfies a preset temperature.

For example, when the supply air temperature is equal to or less than the preset temperature, the first shut-off valve 27 is turned on, and the second shut-off valve 28 is turned off; when the supply air temperature is higher than the preset temperature, the first shut-off valve 27 is opened and the second shut-off valve 28 is closed.

In some embodiments of the present utility model, referring to fig. 1 to 3, a first closing plate 171 is provided between the circumferential portion of the dehumidifying rotor 6 and the inner wall of the cabinet 1.

The air conditioning device may include a first outdoor damper 81 and a first indoor damper 82. The first outdoor damper 81 is provided on the first closing plate 171 and is located in the outdoor air duct 16; the first indoor damper 82 is provided on the first closing plate 171 and is located in the indoor air duct 15.

When the first outdoor damper 81 is opened, a part of fresh air flows through the dehumidifying wheel 6; a part does not pass through the desiccant rotor 6 but flows from the first outdoor damper 81 (bypass flow path). Therefore, when the dehumidifying rotating wheel 6 is in low operation load and even stops working, the heat loss of fresh air can be reduced due to the increase of the bypass flow path, and the efficient removal of the follow-up carbon dioxide removing rotating wheel 3 is ensured.

When the first indoor damper 82 is opened, a part of the indoor air flows through the dehumidifying wheel 6; a part of the air flows from the first indoor damper 82 (bypass flow path) without passing through the desiccant rotor 6, so that when the humidity load (internal circulation cooling or semi-external circulation cooling) is not large, the desiccant rotor 6 is at a low operating load and even stops working, and the bypass flow path is increased, thereby reducing wind resistance and improving working efficiency.

In some embodiments of the present utility model, referring to fig. 4, the interior of the indoor air duct 15 is partitioned into an indoor bypass passage 181 and an indoor humidity adjustment passage 182 between the dehumidifying rotor 6 and the first heat exchanger 21, the indoor bypass passage 181 being located at an outer periphery of the indoor humidity adjustment passage 182, and the dehumidifying rotor 6 corresponding to the indoor humidity adjustment passage 182.

The air conditioning device further includes a first indoor damper 82 and an indoor damper 83. The first indoor air door 82 is arranged on the indoor bypass passage 181 and is used for communicating or blocking the indoor bypass passage 181; the indoor humidity adjusting air door 83 is disposed on the indoor humidity adjusting channel 182, and is used for communicating with or blocking the indoor humidity adjusting channel 182.

When the first indoor damper 82 is closed and the indoor damper 83 is opened, the indoor air flows to the desiccant rotor 6 through the indoor damper 83.

When the first indoor damper 82 is opened and the indoor damper 83 is closed, the indoor air flows to the carbon dioxide removal wheel 3 through the first indoor damper 82, in which case the indoor air does not pass through the dehumidifying wheel 6.

When the device does not need dehumidification, the indoor air does not pass through the dehumidification rotating wheel 6, so that wind resistance can be reduced.

In some embodiments of the present utility model, referring to fig. 4, in the outdoor air duct, the dehumidifying rotor 6 and the second heat exchanger 22 are partitioned into an outdoor bypass passage 183 and an outdoor humidity-adjusting passage 184, the outdoor bypass passage 183 being located at an outer periphery of the outdoor humidity-adjusting passage 184, and the dehumidifying rotor 6 corresponding to the outdoor humidity-adjusting passage 184.

The air conditioning apparatus further includes a first outdoor damper 81 and an outdoor damper 84. The first outdoor damper 81 is provided on the outdoor bypass passage 183 for communicating with or blocking the outdoor bypass passage 183; the outdoor humidity control damper 84 is disposed on the outdoor humidity control channel 184 for communicating with or blocking the outdoor humidity control channel 184.

When the first outdoor damper 81 is closed and the outdoor damper 84 is opened, fresh air flows to the desiccant rotor 6 through the outdoor damper 84.

When the first outdoor damper 81 is opened and the outdoor damper 84 is closed, fresh air flows to the carbon dioxide removal wheel 3 through the first outdoor damper 81, in which case the indoor air does not pass through the dehumidifying wheel 6.

When the device does not need dehumidification, the fresh air does not pass through the dehumidification rotating wheel 6, so that wind resistance can be reduced.

In some embodiments of the present utility model, referring to fig. 1 to 4, there is a second closing plate 172 between the circumference of the carbon dioxide removal wheel 3 and the inner wall of the casing 1;

the air conditioning device further includes: a second outdoor damper 85 and a second indoor damper 86. The second outdoor air door 85 is disposed on the second closing plate 172 and located in the outdoor air duct 16; the second indoor damper 86 is disposed on the second closing plate 172 and is located in the indoor air duct 15.

When the second outdoor damper 85 is opened, a part of the fresh air flows through the carbon dioxide removal wheel 3; a portion flows (bypass flow path) from the second outdoor damper 85 without passing through the carbon dioxide removal rotor 3. In this way, when the carbon dioxide removal rotor 3 is at a low operating load or even is out of operation, windage can be reduced due to the increase in the bypass flow path.

When the second indoor damper 86 is opened, a part of the indoor air flows through the carbon dioxide removal wheel 3; a part of the air flows from the second indoor damper 86 (bypass flow path) without passing through the carbon dioxide removal wheel 3, and thus, when the carbon dioxide removal wheel 3 is at a low operating load or even is stopped, the bypass flow path is increased, so that the wind resistance can be reduced, and the working efficiency can be improved.

According to an embodiment of the present utility model, the second closing plate 172 is inclined from the inner ring to the outer ring direction toward the windward side.

When the air flows from the outdoor bypass passage 183 to the indoor bypass passage 181, the inclination angle of the second closing plate 172 is set to ensure that the air flows more uniformly to the carbon dioxide removal wheel 3.

In addition, the carbon dioxide removal rotating wheel 3 can be added with adsorption materials of VOCs such as formaldehyde, so that the rotating wheel can adsorb formaldehyde on the basis of adsorbing carbon dioxide, and the purpose of removing formaldehyde is achieved.

According to the first conception of the utility model, the carbon dioxide removal rotating wheel 3 is used for absorbing carbon dioxide to reduce the carbon dioxide concentration of indoor air, and the active absorption removal replaces the traditional forced exchange, so that the fresh air demand can be greatly reduced, and the energy waste is avoided.

According to the second conception, the mixing air door is arranged between the indoor air duct and the outdoor air duct, and under the condition that the solubility of the indoor carbon dioxide is high, part of fresh air is introduced by opening the mixing air door, so that the efficiency of reducing the indoor carbon dioxide can be improved.

According to the third conception, the working of the mixing air door, the carbon dioxide removal rotating wheel 3 and the dehumidifying rotating wheel 6 is controlled according to the monitoring of indoor temperature and humidity and carbon dioxide solubility, so that various working modes can be realized to treat different working conditions, the air treatment efficiency is improved, and the energy waste is avoided.

In the fourth concept of the present utility model, bypass flow paths are provided at the dehumidifying rotor 6 and the carbon dioxide removing rotor 3, and the bypass flow paths are opened when the rotor is operated at a low load or is not operated, so that wind resistance can be reduced.

According to the fifth conception of the utility model, the third heat exchanger is arranged on the air outlet side of the carbon dioxide removal rotating wheel 3, and the sensible heat load of the air which is through the rotating wheel or bypass is finally regulated through the third heat exchanger, so that the air reaches ideal air supply conditions, and the working efficiency of the system is improved.

Finally, it should be noted that: the above embodiments are only for illustrating the technical solution of the present utility model, and not for limiting the same; although the utility model has been described in detail with reference to the foregoing embodiments, it will be understood by those of ordinary skill in the art that: the technical scheme described in the foregoing embodiments can be modified or some or all of the technical features thereof can be replaced by equivalents; such modifications and substitutions do not depart from the spirit of the utility model.

The foregoing description, for purposes of explanation, has been presented in conjunction with specific embodiments. However, the illustrative discussions above are not intended to be exhaustive or to limit the embodiments to the precise forms disclosed above. Many modifications and variations are possible in light of the above teaching. The embodiments were chosen and described in order to best explain the principles and the practical application, to thereby enable others skilled in the art to best utilize the embodiments and various embodiments with various modifications as are suited to the particular use contemplated.

Claims

1. An air conditioning apparatus, comprising:

the casing is provided with an outdoor air duct and an indoor air duct;

the heat exchanger assembly comprises a first heat exchanger and a second heat exchanger, the first heat exchanger is positioned in the indoor air duct, and the second heat exchanger is positioned in the outdoor air duct;

the carbon dioxide removal rotating wheel is provided with a carbon dioxide adsorbent, is rotatably connected in the shell and is positioned on the air outlet side of the heat exchanger assembly, and is provided with a desorption area positioned in the outdoor air duct and an adsorption area positioned in the indoor air duct and used for adsorbing and desorbing carbon dioxide in the air flowing through;

when the first heat exchanger is used as an evaporator and the second heat exchanger is used as a condenser, indoor air is ventilated in the indoor air duct, so that the indoor air is cooled in the indoor air duct through the evaporator, and then is adsorbed by the carbon dioxide removing rotating wheel and is circulated into the room after carbon dioxide is removed; and the fresh air is ventilated in the outdoor air duct, so that the fresh air is heated in the outdoor air duct through a condenser, and then the carbon dioxide absorbed by the carbon dioxide removal rotating wheel is separated and circulated outdoors.

2. An air conditioning unit according to claim 1, further comprising:

the dehumidifying rotating wheel is provided with a moisture adsorption material, is rotatably connected in the shell and is positioned between the heat exchanger component and the carbon dioxide removing rotating wheel, one part of the dehumidifying rotating wheel is positioned in the outdoor air duct, and the other part of the dehumidifying rotating wheel is positioned in the indoor air duct and is used for adsorbing and desorbing moisture in air flowing through.

3. The air conditioning unit according to claim 2, wherein a first closing plate is provided between a peripheral portion of the desiccant rotor and an inner wall of the cabinet;

further comprises:

the first outdoor air door is arranged on the first sealing plate and positioned in the outdoor air duct;

the first indoor air door is arranged on the first sealing plate and positioned in the indoor air duct.

4. An air conditioning unit as claimed in claim 2, wherein in the indoor air duct, the desiccant rotor and the first heat exchanger are partitioned into an indoor bypass passage and an indoor humidity-conditioning passage, the indoor bypass passage being located at an outer periphery of the indoor humidity-conditioning passage, the desiccant rotor corresponding to the indoor humidity-conditioning passage;

further comprises:

the first indoor air door is arranged on the indoor bypass channel and is used for communicating or blocking the indoor bypass channel;

the indoor humidity-regulating air door is arranged on the indoor humidity-regulating channel and is used for communicating or blocking the indoor humidity-regulating channel;

when the first indoor damper is opened and the indoor humidity control damper is closed, indoor air flows from the indoor bypass passage to the adsorption area.

5. The air conditioning unit according to claim 2, wherein in the outdoor air duct, the desiccant rotor and the second heat exchanger are partitioned into an outdoor bypass passage and an outdoor humidity-conditioning passage, the outdoor bypass passage being located at an outer periphery of the outdoor humidity-conditioning passage, the desiccant rotor corresponding to the outdoor humidity-conditioning passage;

further comprises:

the first outdoor air door is arranged on the outdoor bypass channel and is used for communicating or blocking the outdoor bypass channel;

the outdoor humidity-regulating air door is arranged on the outdoor humidity-regulating channel and is used for communicating or blocking the outdoor humidity-regulating channel;

when the first outdoor air door is opened and the outdoor humidity regulating air door is closed, fresh air flows to the desorption area from the outdoor bypass channel.

6. The air conditioning unit according to claim 1, wherein a second closing plate is provided between a peripheral portion of the carbon dioxide removal wheel and an inner wall of the casing;

further comprises:

the second outdoor air door is arranged on the second sealing plate and positioned in the outdoor air duct;

and the second indoor air door is arranged on the second sealing plate and positioned in the indoor air duct.

7. The air conditioning unit according to claim 6, wherein the second closing plate is inclined from the inner ring to the outer ring toward the windward side.

8. The air conditioning unit according to claim 1, wherein a mixing damper is provided between the indoor air duct and the outdoor air duct for communicating the indoor air duct and the outdoor air duct; the air mixing door is positioned on the windward side of the heat exchanger component;

9. An air conditioning unit according to claim 1, further comprising: the refrigerant circulation system is provided with a compressor, a four-way valve, the second heat exchanger, an expansion valve and the first heat exchanger;

the refrigerant circulation system further includes:

the third heat exchanger is arranged in the indoor air duct and positioned at the air outlet side of the carbon dioxide removal rotating wheel;

the output end of the compressor is connected with the first interface of the four-way valve, the second interface of the four-way valve is connected with the second heat exchanger, the second heat exchanger is sequentially connected with the expansion valve, the first heat exchanger and the first stop valve in series and then is connected with the third interface of the four-way valve, and the fourth interface of the four-way valve is connected with the input end of the compressor;

and a branch formed by connecting the third heat exchanger with the second stop valve in series is connected in parallel with the two ends of the first stop valve.

10. An air conditioning unit according to claim 1, further comprising:

the outdoor fan is arranged in the outdoor air duct and used for driving fresh air to flow;

and the indoor fan is arranged in the indoor air duct and used for driving indoor air to flow.