CN116928815A

CN116928815A - Air dehumidifying device

Info

Publication number: CN116928815A
Application number: CN202210345031.5A
Authority: CN
Inventors: 都学敏; 李亚军; 周敏; 黄信博
Original assignee: Qingdao Hisense Hitachi Air Conditioning System Co Ltd
Current assignee: Qingdao Hisense Hitachi Air Conditioning System Co Ltd
Priority date: 2022-03-31
Filing date: 2022-03-31
Publication date: 2023-10-24

Abstract

The invention discloses an air dehumidifying device, which comprises an outer shell, a heat exchanger, a first heat exchanger and a second heat exchanger, wherein the heat exchanger comprises a first heat exchanger and a second heat exchanger; a compressor; the reversing device comprises a first reversing device and a second reversing device; the outdoor temperature detection module is used for detecting the outdoor temperature; the outdoor humidity detection module is used for detecting outdoor relative humidity; the air quality detection module is used for detecting the outdoor air quality; a control module configured to: when the outdoor temperature and the outdoor relative humidity meet the dehumidification conditions, the dehumidification is controlled to be started, and a dehumidification mode is determined according to the outdoor air quality. According to the air dehumidifying device, the two reversing devices are arranged, so that the communication state among the four connectors of each reversing device can be controlled, meanwhile, the dehumidifying and heating functions of the indoor air are realized, the cold air feeling is reduced, and the use experience of a user is improved. The scheme can also realize different dehumidification modes according to the outdoor air quality conditions, and meets the health requirements of users during dehumidification.

Description

Air dehumidifying device

Technical Field

The invention relates to the technical field of household appliances, in particular to an air dehumidifying device.

Background

With the improvement of living standard, people pay more attention to the quality of indoor environment, and air needs to be regulated. Air conditioning, including temperature and humidity conditioning, and air quality and comfort are increasingly being appreciated by every household and business, office setting of all types.

In some areas, the phenomenon of returning to the south occurs in the alternate seasons of winter and spring, the outdoor temperature is between 0 and 15 ℃, the relative humidity is more than 80%, and many users dehumidify by installing a fresh air dehumidifier.

The existing fresh air dehumidifier basically has unidirectional flow, fresh air is cooled and dehumidified by an evaporator, then the temperature is increased by a condenser, the moisture content of the process air is reduced, and the temperature is slightly increased, but when the outdoor temperature is lower, the fresh air temperature is still lower by adopting the device. If the indoor unit of the air conditioner is adopted for dehumidification, the temperature of the treated fresh air is lower, even lower than 10 ℃, and the fresh air has strong cold air feeling. In order to solve the above problems, some conventional schemes generally adopt a reheating mode, such as electric heating, heating coils, and the like, which can cause the problem of energy waste caused by cold and heat offset.

Disclosure of Invention

In order to solve the technical problems that an air dehumidifying device in the prior art can cause low indoor air supply temperature and cold air feeling, and the energy waste caused by reheating by adopting electric heating, the air dehumidifying device is provided, and the problems can be solved.

In order to achieve the above purpose, the dehumidifying device of the present invention adopts the following technical scheme:

the invention provides an air dehumidifying device, comprising:

the outdoor air inlet, the outdoor air outlet, the indoor air supply outlet and the indoor air return outlet are formed in the outer shell, and a first heat exchange cavity and a second heat exchange cavity are formed in the outer shell;

the heat exchanger comprises a first heat exchanger arranged in the first heat exchange cavity and a second heat exchanger arranged in the second heat exchange cavity;

the compressors are respectively connected with the two heat exchangers through four-way valves to form a refrigerant circulation flow path;

the reversing device comprises a first reversing device and a second reversing device, the first reversing device is provided with four connecting ports which are respectively and correspondingly connected with the outdoor air outlet, the indoor air supply port, the first heat exchange cavity and the second heat exchange cavity, and the second reversing device is provided with four connecting ports which are respectively and correspondingly connected with the outdoor air inlet, the indoor air return port, the first heat exchange cavity and the second heat exchange cavity;

the outdoor temperature detection module is used for detecting the outdoor temperature;

the outdoor humidity detection module is used for detecting outdoor relative humidity;

the air quality detection module is used for detecting the outdoor air quality;

a control module configured to: when the outdoor temperature and the outdoor relative humidity meet the dehumidification conditions, the dehumidification is controlled to be started, and a dehumidification mode is determined according to the outdoor air quality.

In some embodiments of the invention, the dehumidifying apparatus further comprises:

the exhaust fan is arranged at the outdoor exhaust port;

a blower provided at the indoor air supply port;

an outdoor exhaust air valve arranged in the outdoor exhaust outlet;

an outdoor air inlet valve arranged in the outdoor air inlet;

when the control module controls to dehumidify, four connectors of the first reversing device are controlled to be communicated with each other, the refrigerant circulation system is controlled to operate, one heat exchanger is used as an evaporator, the other heat exchanger is used as a condenser, air passing through the evaporator is dehumidified, the air passing through the condenser is heated, and two paths of air are fully or partially mixed with air of the first reversing device and are discharged into a room through the indoor air supply outlet.

In some embodiments of the present invention, the dehumidification mode includes an inner loop reheat dehumidification mode, and when the outdoor air quality is lower than a set value, controlling to perform the inner loop reheat dehumidification mode includes:

closing the outdoor exhaust air valve and the outdoor inlet air valve;

four connection ports of the second reversing device are controlled to be communicated with each other, one path of indoor return air entering the second reversing device from the indoor return air inlet enters the first heat exchange cavity, the other path of indoor return air enters the second heat exchange cavity, and the indoor return air exchanging heat in the first heat exchange cavity and the second heat exchange cavity enters the first reversing device to mix air and then is discharged from the indoor air supply outlet.

In some embodiments of the invention, the air dehumidifying apparatus further comprises:

respectively obtaining the air return moisture content, the air supply moisture content and the target moisture content;

comparing the air supply moisture content with the target moisture content, adjusting the air flow rate of the second reversing device to the first heat exchange cavity and the second heat exchange cavity respectively according to the comparison result, increasing the air flow rate of the second reversing device to the heat exchange cavity where the evaporator is located when the difference value of the air supply moisture content and the target moisture content is larger than the upper limit value of the moisture content, and decreasing the air flow rate of the second reversing device to the heat exchange cavity where the evaporator is located when the difference value of the air supply moisture content and the target moisture content is smaller than the lower limit value of the moisture content.

the air dehumidifying apparatus further includes:

the return air temperature detection module is used for detecting the return air temperature;

the return air humidity detection module is used for detecting the return air relative humidity;

determining the return air moisture content according to the return air temperature and the return air relative humidity;

an air supply temperature detection module for detecting an air supply temperature;

an air supply humidity detection module for detecting air supply relative humidity;

And determining the air supply moisture content according to the air supply temperature and the air supply relative humidity.

In some embodiments of the present invention, the dehumidification mode further includes a partial fresh air reheat dehumidification mode and a fresh air reheat dehumidification mode, and when the outdoor air quality is not lower than a set value, the partial fresh air reheat dehumidification mode or the fresh air reheat dehumidification mode is controlled to be executed, including:

opening an outdoor air inlet valve;

four connectors of the first reversing device are controlled to be communicated with each other, four connectors of the second reversing device are controlled to be communicated with each other in pairs, so that the indoor return air inlet is communicated with one heat exchange cavity, and the outdoor air inlet is communicated with the other heat exchange cavity.

The operation of a refrigerant circulation system is controlled, and the condition that the evaporator is positioned in a heat exchange cavity communicated with the outdoor air inlet is met;

the fresh air reheating and dehumidifying mode further comprises the following steps:

and opening an outdoor exhaust air valve and an exhaust fan.

In some embodiments of the present invention, the partial fresh air reheating and dehumidification mode or the fresh air reheating and dehumidification mode is judged and executed according to the outdoor temperature, when the outdoor temperature is greater than the temperature limit value, the fresh air reheating and dehumidification mode is judged and executed, otherwise, the partial fresh air reheating and dehumidification mode is judged and executed.

respectively obtaining the air supply moisture content and the return air moisture content;

the partial fresh air reheating and dehumidifying mode further comprises the following steps:

the blower operates according to the set air quantity, controls the first reversing device or the second reversing device, and meets the requirement that the ratio of the fresh air quantity entering from the outdoor air inlet to the return air quantity entering from the indoor return air inlet is a preset value;

comparing the air supply moisture content with the return air moisture content, and comparing the air supply temperature with the return air temperature, and adjusting the ratio of the fresh air quantity to the return air quantity when the difference value between the air supply moisture content and the return air moisture content is not met and is larger than a set threshold value and the air supply temperature is larger than the return air temperature.

In some embodiments of the present invention, the fresh air reheating and dehumidifying mode further includes:

the blower and the exhaust fan respectively operate according to the set air quantity;

comparing the air supply moisture content with the return air moisture content, and comparing the air supply temperature with the return air temperature, and adjusting the opening of the communication port of the first reversing device with the first heat exchange cavity and the second heat exchange cavity respectively when the difference value between the air supply moisture content and the return air moisture content is larger than a set threshold value and the air supply temperature is larger than the return air temperature.

In some embodiments of the present invention, the partial fresh air reheat dehumidification mode further includes determining whether a ratio of the fresh air volume actually detected to the return air volume actually detected accords with the adjusted ratio, and when the ratio is not satisfied, adjusting the opening degrees of the communication ports of the first reversing device and the first heat exchange cavity and the second heat exchange cavity, respectively.

Compared with the prior art, the technical scheme of the invention has the following technical effects:

according to the air dehumidifying device, the two reversing devices are arranged, so that the communication state among the four connectors of each reversing device can be controlled, meanwhile, the dehumidifying and heating functions of the indoor air are realized, the cold air feeling is reduced, and the use experience of a user is improved.

The scheme can also realize different dehumidification modes according to the outdoor air quality conditions, and meets the health requirements of users during dehumidification.

The condenser of the refrigerant circulation system is utilized to heat air, an electric heating module is not needed to be additionally arranged, and energy consumption is saved.

Drawings

In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings required for the description of the embodiments will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and other drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.

FIG. 1 is a schematic view of an embodiment of an air dehumidifying apparatus according to the present invention;

FIG. 2 is a schematic diagram illustrating a connection of a refrigerant circulation system in an embodiment of an air dehumidifying apparatus according to the present invention;

FIG. 3 is a schematic view of a second reversing device in an embodiment of an air dehumidifying apparatus according to the present invention;

FIG. 4 is a schematic view of the back structure of FIG. 3;

FIG. 5 is a schematic view of another construction of a second reversing device of the air dehumidifying apparatus according to the present invention;

fig. 6 is a schematic view of the internal structure of fig. 5 in two states, respectively;

FIG. 7 is a schematic view of the internal structure of FIG. 5 in another state;

FIG. 8 is a control logic diagram of state 1 of the internal circulation reheat dehumidification mode of the air dehumidification device proposed by the present invention;

FIG. 9 is a schematic diagram illustrating a valve plate adjustment of a second reversing device in an internal circulation reheat dehumidification mode of an air dehumidification device according to the present invention;

FIG. 10 is an air path diagram of state 1 of the internal circulation reheat dehumidification mode of the air dehumidification device proposed by the present invention;

FIG. 11 is a control logic diagram of state 2 of the internal circulation reheat dehumidification mode of the air dehumidification device proposed by the present invention;

FIG. 12 is an air path diagram of state 2 of the internal circulation reheat dehumidification mode of the air dehumidifying apparatus of the present invention;

FIG. 13 is a control logic diagram of the air dehumidifying apparatus according to the present invention in the partial fresh air reheat dehumidification mode;

fig. 14 is an air path diagram of state 1 in the partial fresh air reheat dehumidification mode of the air dehumidifying apparatus according to the present invention;

FIG. 15 is a control logic diagram of the air dehumidifying apparatus according to the present invention in the fresh air reheat dehumidifying mode;

fig. 16 is an air path diagram of state 1 in the fresh air reheat dehumidification mode of the air dehumidifying apparatus according to the present invention.

Detailed Description

The following description of the embodiments of the present invention will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present invention, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.

In the description of the present invention, it should be understood that the terms "center," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," and the like indicate orientations or positional relationships based on the orientation or positional relationships shown in the drawings, merely to facilitate describing the present invention and simplify the description, and do not indicate or imply that the devices or elements referred to must have a specific orientation, be configured and operated in a specific orientation, and thus should not be construed as limiting the present invention.

In the description of the present invention, it should be noted that the terms "mounted," "connected," and "coupled" are to be construed broadly, as well as, for example, fixedly coupled, detachably coupled, or integrally coupled, unless otherwise specifically indicated and defined. The specific meaning of the above terms in the present invention will be understood in specific cases by those of ordinary skill in the art. In the description of the above embodiments, particular features, structures, materials, or characteristics may be combined in any suitable manner in any one or more embodiments or examples.

The terms "first," "second," and the like, 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" or "a second" may explicitly or implicitly include one or more such feature. In the description of the present invention, unless otherwise indicated, the meaning of "a plurality" is two or more.

Example 1

The embodiment provides an air dehumidifying apparatus, as shown in fig. 1, which comprises an outer housing 10, wherein an outdoor air inlet OA, an outdoor air outlet EA, an indoor air supply SA and an indoor air return RA are formed on the outer housing 10, and a first heat exchange cavity 11 and a second heat exchange cavity 12 are formed in the outer housing 10.

The air dehumidifying apparatus further comprises at least two heat exchangers, a first heat exchanger 13 disposed in the first heat exchange chamber 11 and a second heat exchanger 14 disposed in the second heat exchange chamber 12, respectively.

As shown in fig. 2, the heat exchanger is sequentially connected through a refrigerant pipe compressor 40, a four-way valve 50 and an electronic expansion valve 60 to form a closed refrigerant circulation flow path, so as to realize the delivery of the refrigerant.

The air dehumidifying device of the embodiment further comprises two reversing devices, namely a first reversing device 20 and a second reversing device 30, wherein the first reversing device 20 is provided with four connectors, and the four connectors are respectively connected with the outdoor air outlet EA, the indoor air supply outlet SA, the first heat exchange cavity 11 and the second heat exchange cavity 12 correspondingly. The communication state among the four connection ports of the first reversing device 20 can be controlled and regulated according to the requirements.

The second reversing device 30 also has four connection ports, which are respectively connected with the outdoor air inlet OA, the indoor air return RA, the first heat exchange cavity 11 and the second heat exchange cavity 12 correspondingly. The communication state among the four connection ports of the second reversing device 30 can be controlled and regulated according to the requirements.

The dehumidifying device further comprises an outdoor temperature detection module, an outdoor humidity detection module and an air quality detection module (not shown in the figure), wherein the outdoor temperature detection module is used for detecting the outdoor temperature and sending the outdoor temperature to the control module. The outdoor humidity detection module is used for detecting outdoor relative humidity, and the air quality detection module is used for detecting outdoor air quality, such as PM2.5.

The control module of the air dehumidifying apparatus is configured to: when the outdoor temperature and the outdoor relative humidity meet the dehumidification conditions, the dehumidification is controlled to be started, and a dehumidification mode is determined according to the outdoor air quality.

In some embodiments of the present invention, determining whether conditions for entering dehumidification are satisfied is:

(1) the outdoor temperature is less than or equal to T1, and when the temperature is not more than T1, the higher the relative humidity is, the lower the temperature of the body is. T1 has a value ranging from 10 ℃ to 18 ℃.

(2) The outdoor relative humidity is more than or equal to M1, and the value range of M1 is 50% -80%.

And if the two conditions are met, controlling to start dehumidification.

The dehumidification device of this embodiment sets up two switching-over devices, through the intercommunication form between four connectors of each switching-over device of control, can realize simultaneously carrying out dehumidification and heating function for sending into indoor wind, reduces cold wind and feels, promotes user's use experience.

An exhaust fan 70 is provided at the outdoor exhaust port EA for drawing the air flow outside the indoor return air port RA into the heat exchange chamber communicated therewith.

An air blower 80 is provided at the indoor air supply port SA for driving an air flow in an air flow passage communicating with the indoor air supply port SA to be discharged from the indoor air supply port SA.

In some embodiments of the present invention, the indoor air supply port SA and the indoor air return port RA are respectively communicated with the indoor, and the outdoor air intake OA and the outdoor air discharge port EA are respectively communicated with the outdoor.

The refrigerant circulation system can realize the exchange of the refrigerating and heating functions of the two heat exchange cavities by changing the flow direction of the refrigerant, and simultaneously, the communication state between the respective connectors is controlled by matching the first reversing device 20 and the second reversing device 30 so as to realize that the air fed into the room through the indoor air supply port SA meets the dehumidification requirement.

The control module can control the four-way valve to change direction, wherein the first heat exchanger 13 is used as an evaporator, the second heat exchanger 14 is used as a condenser, or the first heat exchanger 13 is used as a condenser, and the second heat exchanger 14 is used as an evaporator.

The control module can also realize the switching of different air flow channels by controlling the connection states of the four connection ports of the first reversing device 20 and the second reversing device 30.

According to the air dehumidifying device, through the arrangement of the two reversing devices, the communication state between the four connecting ports of each reversing device can be controlled, meanwhile, the indoor air is fed for dehumidifying and heating, cold air feeling is reduced, and the user experience is improved.

In some embodiments of the present invention, the air dehumidifying apparatus further includes an outdoor exhaust air valve 101 disposed in the outdoor exhaust air outlet EA.

In some embodiments of the present invention, the air dehumidifying apparatus further includes an outdoor air intake valve 102 disposed in the outdoor air intake.

When the control module controls dehumidification, four connectors of the first reversing device are controlled to be communicated with each other, the refrigerant circulation system is controlled to operate, one heat exchanger is used as an evaporator, the other heat exchanger is used as a condenser, air passing through the evaporator is dehumidified, the air passing through the condenser is heated, and two paths of air are fully or partially mixed with air of the first reversing device and are discharged through the indoor air supply outlet. The mixed wind can dehumidify and heat up at the same time, and comfortable air supply is provided for users.

In some embodiments of the present invention, the dehumidification mode includes an inner loop reheat dehumidification mode, and when the outdoor air quality is below a set point, controlling to execute the inner loop reheat dehumidification mode includes:

the outdoor exhaust damper 101 and the outdoor intake damper 102 are closed.

Four connectors of the second reversing device 30 are controlled to be communicated with each other, one path of indoor return air entering the second reversing device 30 from an indoor return air inlet RA enters the first heat exchange cavity 11, the other path of indoor return air enters the second heat exchange cavity 12, and the indoor return air exchanging heat in the first heat exchange cavity 11 and the second heat exchange cavity 12 enters the first reversing device 20 to mix air and then is discharged from an indoor air supply inlet.

The dehumidification principle of the internal circulation reheating dehumidification mode is as follows: one path of air passing through the evaporator in the indoor return air is absorbed by the refrigerant in the evaporator, and the moisture is condensed into water to be converged, so that the purpose of removing the moisture in the fresh air is achieved.

At this time, the other path of indoor return air enters the heat exchange cavity where the condenser is located, the return air is heated by the condenser when passing through the condenser, the temperature rises, and then the two paths of indoor return air enter the first reversing device 20 to be mixed so as to obtain dry and high-temperature air supply.

The scheme is suitable for the condition of outdoor air pollution, and outdoor polluted air is prevented from entering a room through the air port communicated with the outside by closing the outdoor exhaust air valve 101 and the outdoor air inlet air valve 102, so that the respiratory health of a user is ensured.

In some embodiments of the present invention, the air dehumidifying apparatus further includes two water receiving trays (not shown) disposed below the first and second heat exchangers 13 and 14, respectively, for collecting condensed water generated during dehumidification.

The water-receiving tray has limited water-storage capacity, and when the water-receiving tray is full of water, the water can be discharged out of the outer shell 10 through the water pump.

The water receiving tray is provided with a water level detection module for controlling and acquiring the water level of the water receiving tray corresponding to the evaporator and controlling the water discharge when the water level reaches a set value

The dehumidifying effect of the air supplied to the indoor is related to the flow rate of air passing through the evaporator and the moisture content, and in order to secure the dehumidifying effect, in some embodiments of the present invention, the air dehumidifying apparatus further comprises: respectively obtaining the air return moisture content, the air supply moisture content and the target moisture content;

and comparing the air supply moisture content with the target moisture content, adjusting the air flow of the second reversing device to the first heat exchange cavity and the second heat exchange cavity respectively according to the comparison result, increasing the air flow of the second reversing device to the heat exchange cavity where the evaporator is positioned when the difference value of the air supply moisture content and the target moisture content is larger than the upper limit value of the moisture content, and decreasing the air flow of the second reversing device to the heat exchange cavity where the evaporator is positioned when the difference value of the air supply moisture content and the target moisture content is smaller than the lower limit value of the moisture content.

That is, when the difference between the supply air moisture content and the target moisture content is too large, it is necessary to increase the dehumidification by increasing the air flow rate of the second reversing device to the heat exchange chamber where the evaporator is located.

When the difference between the air supply moisture content and the target moisture content is smaller, the current air supply moisture content can meet the requirement, and the air flow to the heat exchange cavity where the condenser is positioned is properly increased, so that the air supply temperature is increased, namely the comfort is improved.

According to the scheme, the relation among the air supply moisture content, the return air moisture content and the target moisture content is judged in real time, the air flow to the heat exchange cavity where the evaporator is located is timely adjusted, and the efficient dehumidification effect is guaranteed all the time.

In order to obtain the supply air moisture content, the return air moisture content and the target moisture content respectively, the air dehumidifying device further comprises:

and the return air temperature detection module is used for detecting the return air temperature.

And the return air humidity detection module is used for detecting the return air relative humidity.

And determining the return air moisture content according to the return air temperature and the return air relative humidity.

And the air supply temperature detection module is used for detecting the air supply temperature.

And the air supply humidity detection module is used for detecting the air supply relative humidity.

The determination of the corresponding moisture content based on temperature and relative humidity can be obtained using existing algorithms and will not be described in detail herein.

If the user does not directly set the target moisture content, but sets the target temperature and the target relative humidity, the target moisture content can be calculated according to the target temperature and the target relative humidity as well.

In some embodiments of the present invention, the dehumidification mode further includes a partial fresh air reheating dehumidification mode and a fresh air reheating dehumidification mode, when the outdoor air quality is not lower than a set value, the partial fresh air reheating dehumidification mode or the fresh air reheating dehumidification mode is controlled to be executed, that is, when the outdoor air is better, the oxygen content of the indoor air can be improved by introducing the outdoor fresh air.

The partial fresh air reheating and dehumidifying mode and the fresh air reheating and dehumidifying mode respectively comprise:

the outdoor intake valve 102 is opened.

The four connection ports of the first reversing device 20 are controlled to be communicated with each other, and the four connection ports of the second reversing device 30 are controlled to be communicated with each other, so that the indoor air return port RA is communicated with one heat exchange cavity, and the outdoor air inlet OA is communicated with the other heat exchange cavity.

The operation of the refrigerant circulation system is controlled, and the condition that the evaporator is positioned in a heat exchange cavity communicated with the outdoor air inlet is met.

The outdoor fresh air enters the heat exchange cavity where the evaporator is located through the indoor air inlet OA to dehumidify, dry and low-temperature air is obtained, the indoor return air enters the heat exchange cavity where the condenser is located through the indoor air return opening RA to heat, high-temperature air is obtained, and the two paths of air flows are mixed in the first reversing device 20 and exhausted to the room.

the outdoor exhaust damper 101 is opened and the exhaust fan 70 is opened.

By opening the outdoor exhaust valve 101 and the exhaust fan 70, part of the indoor return air is exhausted outdoors through the outdoor exhaust port EA, so that the effect of exchanging the fresh air indoors is achieved.

In some embodiments of the present invention, the method further includes determining to execute a partial fresh air reheat dehumidification mode or a fresh air reheat dehumidification mode according to the outdoor temperature, and determining to execute the fresh air reheat dehumidification mode when the outdoor temperature is greater than the temperature limit value, or determining to execute the partial fresh air reheat dehumidification mode.

When the outdoor temperature is lower, the outdoor temperature is lower at this moment, and the fresh air can cause fresh air load to increase, and the energy consumption is too big, and the control carries out partial fresh air reheat dehumidification mode, can avoid above-mentioned problem.

When the outdoor temperature is relatively high, the outdoor temperature is not low, fresh air load is not increased, and the energy consumption is excessive due to fresh air, so that the fresh air reheating and dehumidifying mode can be controlled to be executed, fresh air quantity for indoor air can be increased, and oxygen content is improved.

In some embodiments of the present invention, the air dehumidifying apparatus further includes acquiring supply air moisture content and return air moisture content, respectively.

first, an initial ratio of the fresh air volume to the return air volume is given, that is, the blower 80 operates according to the set air volume, and the first reversing device 20 or the second reversing device 30 is controlled, so that the ratio of the fresh air volume entering from the outdoor air inlet OA to the return air volume entering from the indoor air return RA is a preset value.

In general, when the fresh air volume is large, the air supply temperature is low, and when the return air volume is large, the air supply moisture content is increased, so that in some embodiments of the invention, the air supply temperature can be adjusted according to the principle when the air supply volume is adjusted.

According to the scheme, the proportion of fresh air quantity to return air quantity is adjusted, so that the temperature and the humidity of air supply are guaranteed to meet the user requirements.

In some embodiments of the present invention, the partial fresh air reheating and dehumidification mode further includes determining whether the ratio of the fresh air volume actually detected to the return air volume actually detected accords with the adjusted ratio, and when the ratio is not satisfied, adjusting the opening degrees of the communication ports of the first reversing device 20 and the first heat exchange cavity 11 and the second heat exchange cavity 12 respectively, so as to adjust the fresh air volume respectively entering from the outdoor air inlet OA and the return air volume entering from the indoor return air inlet RA.

In some embodiments of the present invention, the fresh air reheat dehumidification mode further includes:

comparing the air supply moisture content with the return air moisture content, and comparing the air supply temperature with the return air temperature, and adjusting the opening of the communication port of the first reversing device and the first heat exchange cavity and the second heat exchange cavity respectively when the difference value between the air supply moisture content and the return air moisture content is not met and is larger than a set threshold value and the air supply temperature is larger than the return air temperature.

The adjusting principle can be referred to the adjusting principle of the partial fresh air reheating and dehumidifying mode.

According to the scheme, the opening degree of the communication port of the first reversing device and the first heat exchange cavity and the second heat exchange cavity is adjusted, so that the requirements of air supply moisture content and air supply temperature are met simultaneously.

Example two

There are various implementations of the reversing device, and the first reversing device 20 is taken as an example in this embodiment.

As shown in fig. 3 and 4, the four connection ports of the first reversing device 20 are a first connection port 201, a second connection port 202, a third connection port 203, and a fourth connection port 204, respectively, which are respectively communicated with the valve chamber of the first reversing device 20. The four connectors are respectively connected with an outdoor air outlet EA, an indoor air supply outlet SA, a first heat exchange cavity 11 and a second heat exchange cavity 12 correspondingly.

The blocking part can be realized by a valve plate 205, and the driving device 206 is controlled by the control module and is used for driving the valve plate 205 to rotate.

When the valve plate 205 rotates to different positions, the four connecting ports can be correspondingly communicated.

The four connection ports of the second reversing device 30 are a first connection port 301, a second connection port 302, a third connection port 303 and a fourth connection port 304, respectively, and the four connection ports are respectively communicated with the valve cavity of the second reversing device 20. The four connectors are respectively and correspondingly connected with the outdoor air inlet OA, the indoor air return RA, the first heat exchange cavity 11 and the second heat exchange cavity 12.

In the present embodiment, a specific connection method is provided, but is not limited to one in the present embodiment.

The first connection port 201 of the first reversing device is connected with the indoor air supply port SA, the fourth connection port 204 of the first reversing device is connected with the outdoor air outlet EA, the second connection port 202 of the first reversing device is communicated with the first heat exchange cavity 11, and the third connection port 203 of the first reversing device is communicated with the second heat exchange cavity 12.

As shown in fig. 5, the first reversing device 20 includes two opposite side panels 207 and 208 and a front panel 209, wherein two connection ports are formed on the opposite side panels 207 and 208, respectively, a first connection port 201 and a fourth connection port 204, and the other two connection ports are formed on the front panel 209, respectively, a second connection port 202 and a third connection port 203, and the rotation axis of the valve plate 205 is located between the second connection port 202 and the third connection port 203, so that the first connection port 201 can be communicated with the second connection port 202, the third connection port 203 can be communicated with the fourth connection port 204, or the first connection port 201 can be communicated with the third connection port 203, and the second connection port 202 can be communicated with the fourth connection port 204.

In some embodiments, the two side panels 207, 208 disposed opposite each other are cambered surfaces, and are perpendicular to the front panel 209 with respect to the axial direction of the cambered surfaces. The third interface 203 is located above the second interface 202. Of course, the third interface 203 may also be located below the second interface 202.

The rotation axis of the valve plate 205 is located at the center of the valve plate 205 and is coaxially disposed with the two cambered surfaces. As shown in fig. 6, the valve plate 205 rotates along the arc surface, and when the valve plate rotates to the position i, the first connection port 201 communicates with the third connection port 203, and the second connection port 202 communicates with the fourth connection port 204. When the valve plate 205 rotates to the position ii, the first connection port 201 is communicated with the second connection port 202, and the third connection port 203 is communicated with the fourth connection port 204. As shown in fig. 7, when the valve plate 205 is rotated to the horizontal position, the first connection port 201, the third connection port 203, the second connection port 202, and the fourth connection port 204 communicate with each other.

The first connection port 301 of the second reversing device 30 is connected with the indoor return air inlet RA, the fourth connection port 304 of the second reversing device is connected with the outdoor air inlet OA, the second connection port 302 of the second reversing device is communicated with the first heat exchange cavity 11, and the third connection port 303 of the second reversing device is communicated with the second heat exchange cavity 12.

The second reversing device 30 is similar to the first reversing device 20 in structure, and will not be described here.

Example III

This example provides a specific embodiment of an internal recycle reheat dehumidification mode.

The present embodiment will be described by taking the reversing device in the second embodiment as an example.

In this embodiment, the second connection port 302 of the second reversing device 30 and the second connection port 202 of the first reversing device 20 are respectively communicated with the first heat exchange chamber 11, and the third connection port 303 of the second reversing device 30 and the third connection port 203 of the first reversing device 20 are respectively communicated with the second heat exchange chamber 12 are described as an example.

State 1: the state of the four-way valve is controlled with the second heat exchanger 14 as the evaporator as the target.

As shown in fig. 8, when the internal-cycle reheat dehumidification mode is executed, the exhaust fan 70 is closed, the outdoor exhaust air valve 101 is closed, and the outdoor intake air valve 102 is closed. The air quantity proportion of the evaporator and the condenser is controlled through the reversing device, and the opening degree of the valve plates of the reversing device is determined according to the indoor dehumidification quantity, wherein the opening degree of the valve plates 205 and 305 of the first reversing device and the second reversing device is included.

The valve plate 205 of the first reversing device 20 has an opening angle α4 (as shown in fig. 7, i.e., a horizontal position), and the four connection ports of the first reversing device 20 are mutually communicated. Detecting the air supply quantity of the blower 80; the supply air moisture dSA, return air moisture dRA and target moisture dset are obtained, respectively.

Referring to table 1, fig. 9 and fig. 10, the valve plate 305 of the second reversing device 30 is initially opened by an angle αi; after 10 minutes, the relation between the air supply moisture dSA and the set target moisture dset is determined, and the opening angle of the valve plate 305 of the second reversing device 30 is adjusted.

(1) If dSA > dset+ (dRA-dset) is 5%, the opening angle of the second reversing device 30 is adjusted to α (i-1), that is, the humidity is higher, and the opening between 301 and 303 is increased, so that more return air is dehumidified by the evaporator; and then returning to judge the relation between dSA and dset again until the condition that the opening angle is kept unchanged is met.

(2) If dset- (dRA-dset) is 5% dSA +.dset+ (dRA-dset) is 5%, the opening angle of the second commutation device 30 remains unchanged; the dSA-dset relationship is then returned again.

(3) If dSA < dset- (dRA-dset) 5%, the opening angle of the second reversing device 30 is adjusted to α (i+1); that is, at this time, the humidity is lower, the opening between 301 and 302 is increased, so that more return air is heated by the condenser, the air supply temperature is increased under the premise of meeting the humidity, the use comfort of a user is further improved, and then the relation between dSA and dset is judged again until the condition that the opening angle is kept unchanged is met.

As shown in fig. 10, the valve plate state in the reversing device at this time is as follows:

first reversing device 20: the valve plate 205 is in a horizontal state, and is used for mixing two paths of air coming out of the third connecting port 203 and the second connecting port 202.

The second reversing device 30: the angle of the valve plate 305 is controlled by the dehumidification amount, and is used for distributing the air flow of the two air channels; the opening angle of the valve plate 305 directly influences the air distribution. As shown in table 1 below:

TABLE 1

Wherein, alpha 3 to-alpha 3 can be seen in figure 9.

As shown in fig. 10, in the case of state 1, the air flow path is divided into two paths in the second reversing device 30 from the indoor return air port RA, and the indoor air enters the second reversing device 30: one path flows from the third connection port 303 of the second reversing device to the second heat exchanger 14 (this heat exchanger is an evaporator at this time), the air is cooled down, the temperature is lowered, the moisture content is lowered, the condensed water flows into the water receiving tray, is discharged by the water pump, then enters the first reversing device 20 from the third connection port 203 of the first reversing device, flows from the first connection port 201 of the first reversing device to the indoor air supply port SA, and is mixed with the air flowing out from the second connection port 202 of the first reversing device at the first connection port 201 of the first reversing device.

The other path flows from the second connection port 302 of the second reversing device to the first heat exchanger 13 (this heat exchanger is now a condenser), and the air is heated, then enters the first reversing device from the second connection port 202 of the first reversing device, flows from the first connection port 201 of the first reversing device to the indoor air supply port SA, and is mixed with the air flowing out from the third connection port 203 of the first reversing device at the first connection port 201 of the first reversing device.

State 2: the state of the four-way valve is controlled with the first heat exchanger 13 as an evaporator as a target.

As shown in fig. 11, the exhaust fan 70 is turned off, the outdoor exhaust valve 101 is turned off, and the outdoor intake valve 102 is turned off.

The opening angle of the first reversing device 20 is alpha 4 (namely, the horizontal position), and the air supply quantity of the blower 80 is detected; the current indoor temperature and supply air moisture dSA, return air moisture dRA and target moisture dset are detected.

The opening angle of the second reversing device 30 is alpha i; after 10 minutes, the relation between the air supply moisture dSA and the set target moisture dset is determined, and the opening angle of the second reversing device 30 is adjusted.

(1) If dSA > dset+ (dRA-dset) is 5%, the opening angle of the second reversing device 30 is adjusted to α (i+1), that is, the opening degree of the communication port between 301 and 302 is increased, so that more return air is dehumidified by the evaporator; and then returning to judge the relation between dSA and dset again until the condition that the opening angle is kept unchanged is met.

(3) If dSA < dset- (dRA-dset) 5%, the opening angle of the second reversing device 30 is adjusted to be α (i-1); that is, the opening degree of the communication port between 301 and 303 is increased, so that more return air is heated by the evaporator on the premise of meeting the humidity requirement, thereby reducing cold air feeling and improving comfort; and then returning to judge the relation between dSA and dset again until the condition that the opening angle is kept unchanged is met.

As shown in fig. 12, the air flow path is in state 2.

Example IV

The embodiment provides a specific implementation scheme of a part of fresh air reheating and dehumidifying mode.

When the outdoor air condition is good, but the outdoor temperature is low, the fresh air load is increased due to the fresh air, and the energy consumption is overlarge; if only dehumidification is performed at this time, the air supply temperature is lower; in order to raise the air supply temperature, the indoor air is introduced into the condenser side, the heat of the condenser is used for heating the air, and the air is mixed with the cooled and dehumidified fresh air before the indoor air supply port SA, so that the fresh air can be dehumidified, and the air supply temperature can be raised.

State 1: the state of the four-way valve is controlled with the first heat exchanger 13 as an evaporator as a target.

As shown in fig. 13, the exhaust fan 70 is turned off, the outdoor exhaust damper 101 is turned off, and the outdoor intake damper 102 is turned on.

The first reversing device 20 is opened by an angle alpha 4 (i.e. a horizontal position), and the second reversing device 30 is opened by an angle alpha 7; the blower 80 is operated according to a set air volume, such as 300m3/h, and the unit is initially operated according to a preset ratio of fresh air volume QOA to return air volume QRA, such as QOA/qra=1:2.

The first step: and judging whether the air supply temperature and the air supply moisture content meet the requirements.

After stabilization, judging whether (1) dSA < dRA-beta and (2) TSA > TRA are simultaneously met, if not, adjusting the ratio lambda of fresh air quantity and return air quantity, and returning again after each adjustment to judge whether the requirements of the moisture content and the temperature are met; until the air quantity is satisfied, the ratio of the fresh air quantity to the return air quantity is kept unchanged. Where dSA is supply air moisture content, dRA is return air moisture content, TSA is supply air temperature, and TRA is return air temperature.

When the total air supply amount is fixed, if the air supply moisture content dSA is higher than the set limit value, the air supply moisture content can be reduced by increasing the air quantity passing through the evaporator.

And a second step of: then judging whether the actual air quantity detection value is consistent with the proportion

And acquiring the return air quantity QRA of the indoor return air port RA, judging whether the return air quantity QRA is equal to or close to (QSA 1/(1+lambda)) (1+/-10%) or not, and if the return air quantity QRA is not satisfied, adjusting the opening angle of the first reversing device 20 until the condition is satisfied. Qsa=qra+qoa, QOA: qra=λ.

The return air amount QRA of the indoor return air port RA can be obtained by the differential pressure sensor 103 provided in the indoor return air port RA.

As shown in fig. 14, the air flow path is in state 1.

Fresh air channel: outdoor fresh air enters a fourth connection port 304 of the second reversing device from an outdoor air inlet OA, then reaches the first heat exchanger 13 from the second connection port 302 of the second reversing device, is cooled and dehumidified by the first heat exchanger 13, water is condensed from air, and is subjected to a flow channel water receiving disc and discharged by a drainage pump; the fresh air cooled and dehumidified in this way reaches the second connection port 202 of the first reversing device, then reaches the first connection port 201 of the first reversing device, and finally is sent into the room by the blower 80 through the indoor air supply port SA.

An inner circulation channel: indoor air enters the first connecting port 301 of the second reversing device from the indoor return air RA, reaches the second heat exchanger 14 from the third connecting port 303 of the second reversing device, and is heated by the second heat exchanger 14, so that the temperature is increased; then, the fresh air reaches the third connection port 203 of the first reversing device, then reaches the first connection port 201 of the first reversing device (where the fresh air is mixed with the fresh air), and finally, the fresh air is sent into the room through the air supply port SA by the blower 80.

In state 2, the state of the four-way valve is controlled with the second heat exchanger 14 as the evaporator as the target. The principle of state 2 in this mode is similar to that of state 1, and only the difference is that the functions of the two heat exchangers are interchanged, and the corresponding refrigerant flow channels are interchanged, which is not described here.

Example five

The present example provides a specific implementation of a fresh air reheat dehumidification mode.

At the moment, the outdoor temperature is not low (5-15 ℃), and the fresh air load cannot be increased and the energy consumption is overlarge due to the fresh air. At this time, the temperature of the treated fresh air is low, and the introduction amount of the fresh air is large, so that the indoor positive pressure is large, and a part of air needs to be discharged under the condition. In order to raise the air supply temperature, part of the exhaust air is mixed with the fresh air cooled and dehumidified before the indoor air supply port SA, so that the fresh air can be dehumidified, and the air supply temperature can be raised.

As shown in fig. 15, after the fresh air reheating and dehumidification mode is entered, the exhaust fan 70 is turned on, the outdoor exhaust damper 101 is turned on, and the outdoor intake damper 102 is turned on.

The first reversing device 20 is opened by an angle alpha 4 (i.e. a horizontal position), and the second reversing device 30 is opened by an angle alpha 7; blower 80 is operated at a set air volume QSA, such as 300m3/h, and exhaust fan 70 is operated at a set air volume QEA, such as 200m3/h.

After stabilization, it was judged whether (1) dSA < dRA-. Beta.and (2) TSA > TRA were satisfied at the same time. If not, the first reversing device adjusts the opening angle, and returns to judge whether the requirements of the moisture content and the temperature are met after each adjustment; until satisfied, then the opening angle is maintained unchanged.

Judging whether the detection value QRA of the differential pressure sensor is equal to QSA, if not, adjusting the rotating speed of the exhaust fan 70, and returning to judge whether the air quantity requirement is met after each adjustment until the air quantity requirement is met; and returns to the first step again, and again judges whether (1) dSA < dRA-beta and (2) TSA > TRA are satisfied at the same time.

As shown in fig. 16, the air flow path is in state 1.

Fresh air channel: outdoor fresh air enters a fourth connection port 304 of the second reversing device from an outdoor air inlet OA, then reaches the first heat exchanger 13 from the second connection port 302 of the second reversing device, is cooled and dehumidified by the first heat exchanger 13, water is condensed from the air, and is collected in a flow passage and discharged by a drainage pump; the fresh air cooled and dehumidified in this way reaches the second connection port 202 of the first reversing device, then reaches the first connection port 201 of the first reversing device, and finally is sent into the room by the blower 80 through the indoor air supply port SA.

And an exhaust channel: indoor air enters the first connecting port 301 of the second reversing device from the indoor return air RA, reaches the second heat exchanger 14 from the third connecting port 303 of the second reversing device, and is heated by the second heat exchanger 14, so that the temperature is increased; then, the fresh air reaches the third connecting port 203 of the first reversing device, and then is divided into two parts, wherein one part flows to the first connecting port 201 of the first reversing device and is mixed with the fresh air, and finally, the fresh air is sent into the room through the indoor air supply port SA by the air feeder 80; the other part flows to the exhaust fan 70 and is discharged to the outside through the outdoor exhaust port EA.

The foregoing is merely illustrative of the present invention, and the present invention is not limited thereto, and any changes or substitutions easily contemplated by those skilled in the art within the scope of the present invention should be included in the scope of the present invention. Therefore, the protection scope of the invention is subject to the protection scope of the claims.

Claims

1. An air dehumidifying apparatus, comprising:

the air quality detection module is used for detecting the outdoor air quality;

2. The air dehumidifying device of claim 1, wherein the dehumidifying device further comprises:

the exhaust fan is arranged at the outdoor exhaust port;

a blower provided at the indoor air supply port;

an outdoor exhaust air valve arranged in the outdoor exhaust outlet;

an outdoor air inlet valve arranged in the outdoor air inlet;

3. The air dehumidifying device of claim 2, wherein the dehumidifying mode includes an inner-cycle reheat dehumidifying mode, and wherein controlling the inner-cycle reheat dehumidifying mode to be performed when the outdoor air quality is lower than a set value includes:

closing the outdoor exhaust air valve and the outdoor inlet air valve;

4. An air dehumidifying device as claimed in claim 3 wherein the air dehumidifying device further comprises:

5. The air dehumidifying device of claim 4, wherein the air dehumidifying device further comprises:

6. The air dehumidifying apparatus as claimed in claim 2, wherein the dehumidifying mode further includes a partial fresh air reheating dehumidifying mode and a fresh air reheating dehumidifying mode, and the controlling of executing the partial fresh air reheating dehumidifying mode or the fresh air reheating dehumidifying mode when the outdoor air quality is not lower than a set value includes:

opening an outdoor air inlet valve;

the four connection ports of the first reversing device are controlled to be communicated with each other, the four connection ports of the second reversing device are communicated with each other two by two, the indoor return air inlet is communicated with one heat exchange cavity, and the outdoor air inlet is communicated with the other heat exchange cavity;

and opening an outdoor exhaust air valve and an exhaust fan.

7. The air dehumidifying apparatus as claimed in claim 6, wherein the partial fresh air reheating and dehumidifying mode or the fresh air reheating and dehumidifying mode is judged to be performed according to an outdoor temperature, and the fresh air reheating and dehumidifying mode is judged to be performed when the outdoor temperature is greater than a temperature limit value, and otherwise the partial fresh air reheating and dehumidifying mode is judged to be performed.

8. The air dehumidifying device of claim 6, wherein the air dehumidifying device further comprises:

9. The air dehumidifying device of claim 8, wherein the fresh air reheat dehumidifying mode further comprises:

10. The air dehumidifying device of claim 8, wherein the partial fresh air reheat dehumidifying mode further comprises determining whether a ratio of the actual detected fresh air quantity to the actual detected return air quantity corresponds to an adjusted ratio, and adjusting the opening degree of the communication ports of the first reversing device and the first heat exchange chamber and the second heat exchange chamber, respectively, when the ratio is not satisfied.