CN117006546A

CN117006546A - Self-cleaning method of fresh air dehumidifying all-in-one machine

Info

Publication number: CN117006546A
Application number: CN202210465867.9A
Authority: CN
Inventors: 李川; 王文超; 迟丽华
Original assignee: Qingdao Hisense Hitachi Air Conditioning System Co Ltd
Current assignee: Qingdao Hisense Hitachi Air Conditioning System Co Ltd
Priority date: 2022-04-29
Filing date: 2022-04-29
Publication date: 2023-11-07

Abstract

The invention discloses a self-cleaning method of a fresh air dehumidification integrated machine, which comprises a total heat exchanger and a heat pump refrigerant system, wherein the heat pump refrigerant system comprises an exhaust heat exchanger, a first air inlet heat exchanger and a second air inlet heat exchanger; responding to a self-cleaning instruction aiming at the fresh air dehumidification integrated machine, and entering a continuous self-cleaning mode, wherein the self-cleaning mode comprises at least one self-cleaning stage, and each cleaning stage sequentially comprises a pretreatment stage, an exhaust heat exchanger frosting stage, an exhaust heat exchanger defrosting-second air inlet heat exchanger frosting stage and a second air inlet heat exchanger frosting stage; the fresh air dehumidifying all-in-one machine has compact overall structure, small volume and convenient installation; the energy utilization rate is high; through the switching of different air conditioning modes, the air exhaust heat exchanger and the second air inlet heat exchanger realize frosting-defrosting-high-temperature three-stage treatment, realize the double effects of self-cleaning and high-temperature sterilization, reduce the workload of maintenance and cleaning the heat exchanger after being sold outside a factory, and are beneficial to improving the cleaning efficiency.

Description

Self-cleaning method of fresh air dehumidifying all-in-one machine

Technical Field

The invention belongs to the technical field of air conditioners, and particularly relates to a self-cleaning method of a fresh air dehumidifying all-in-one machine.

Background

Along with the increasing standard of living, the requirements of people on the quality of life are also higher. The indoor furniture and decoration cause long-time indoor air pollution, and the requirements of people on indoor fresh air exchange are also more and more strong. The total heat exchanger can realize indoor and outdoor air heat exchange so as to meet the requirement of a user on fresh air exchange.

In the prior art, an air inlet channel and an air outlet channel which can exchange heat with each other are arranged in the total heat exchanger, and the air inlet channel and the air outlet channel are respectively provided with a fan so as to realize the flow of indoor air and outdoor air. Under the effect of the fan, the air exhaust channel discharges indoor air, the air inlet channel introduces outdoor new air, and the new air exchanges heat with the discharged indoor air so as to reduce the fluctuation influence of fresh air on indoor temperature. With the continuous progress of the technology, the total heat exchanger is matched with a heat pump refrigerant system, so that the fresh air conditioner with the functions of temperature adjustment and dehumidification is gradually popularized and used.

When the air conditioner is not used for a long time, a large amount of accumulated ash exists, impurities such as dust and the like are deposited on the heat exchanger to cause the heat exchanger to be dirty and blocked, so that the heat exchange quantity is reduced, the heat exchange performance of the air conditioner is greatly reduced, a large amount of bacteria can be bred in the dust and the dirt of the heat exchanger, the health of a user is adversely affected, and therefore the heat exchanger of the air conditioner needs to be cleaned regularly.

Disclosure of Invention

The invention aims to provide a self-cleaning method of a fresh air dehumidifying all-in-one machine, which aims to solve the problems that after a heat exchanger in the existing fresh air dehumidifying all-in-one machine is used for a long time in the prior art, the heat exchange performance is reduced, the health of a user is affected and the like.

In order to achieve the aim of the invention, the invention is realized by adopting the following technical scheme:

a self-cleaning method of a fresh air dehumidifying integrated machine is characterized in that,

fresh air dehumidification all-in-one includes:

total heat exchanger: the heat exchange type air conditioner comprises an outer shell, and a heat exchange core, an exhaust fan and an air supply fan which are arranged in the outer shell, wherein an outdoor air inlet, an outdoor air outlet, an indoor air supply opening and an indoor air return opening are formed in the outer shell;

heat pump refrigerant system: the air conditioner comprises a compressor, a four-way valve, an exhaust heat exchanger, a first air inlet heat exchanger and a second air inlet heat exchanger which are connected together through refrigerant pipelines;

the air exhaust heat exchanger is connected with one valve port of the four-way valve, the other end of the air exhaust heat exchanger is connected with the first air inlet heat exchanger through a first refrigerant branch, the air exhaust heat exchanger is connected with the second air inlet heat exchanger through a second refrigerant branch, and the first air inlet heat exchanger is connected with the second air inlet heat exchanger through a third refrigerant branch; the other end of the second air inlet heat exchanger is connected with a four-way valve;

The self-cleaning method comprises the following steps:

responding to a self-cleaning instruction aiming at the fresh air dehumidification integrated machine, entering a continuous self-cleaning mode, wherein the self-cleaning mode comprises at least one self-cleaning stage, and each cleaning stage sequentially comprises a pretreatment stage, an exhaust heat exchanger frosting-second air inlet heat exchanger frosting stage and a second air inlet heat exchanger frosting stage:

in the pretreatment stage, the heat pump refrigerant system operates in a refrigeration mode, and the total heat exchanger is in an internal/external circulation mode;

in the frosting stage of the exhaust heat exchanger, the heat pump refrigerant system operates in a heating mode, and the total heat exchanger is in a total heat mode or an internal/external circulation mode;

in the defrosting stage of the exhaust heat exchanger and the frosting stage of the second air inlet heat exchanger, the heat pump refrigerant system operates in a refrigeration mode, and the total heat exchanger is in an internal/external circulation mode;

in the defrosting stage of the second air inlet heat exchanger, the heat pump refrigerant system operates in a heating mode, and the total heat exchanger is in a total heat mode or an internal/external circulation mode.

In some embodiments of the present application, after the fresh air dehumidifying integrated machine enters the self-cleaning mode, the outdoor ambient temperature, the indoor CO2 concentration and the outdoor PM2.5 concentration are obtained, and the full heat exchanger is sequentially determined to be in a full heat mode or an internal/external circulation mode in the frosting stage of the exhaust heat exchanger and the frosting stage of the second intake heat exchanger according to the outdoor ambient temperature, the indoor CO2 concentration and the outdoor PM2.5 concentration.

In some embodiments of the application, when the outdoor ambient temperature is greater than a preset temperature threshold, the total heat exchanger turns on the inner/outer circulation mode in an exhaust heat exchanger frosting phase and a second intake heat exchanger frosting phase;

when the outdoor environment temperature is not greater than a preset temperature threshold, judging the indoor CO2 concentration:

when the indoor CO2 concentration is larger than the CO2 concentration threshold, the total heat exchanger enters a total heat mode;

when the indoor CO2 concentration is not more than the CO2 concentration threshold value, judging the outdoor PM2.5 concentration:

when the outdoor PM2.5 concentration is greater than the PM2.5 concentration threshold, the total heat exchanger enters an internal/external circulation mode;

when the outdoor PM2.5 concentration is not greater than the PM2.5 concentration threshold, the total heat exchanger enters a total heat mode.

In some embodiments of the application, in the pretreatment stage, the air supply fan is controlled to stop, and the air exhaust fan operates at a first target rotation speed;

in the frosting stage of the exhaust heat exchanger, the air supply fan and the exhaust fan all operate at a first target rotating speed;

in the defrosting stage of the exhaust heat exchanger and the frosting stage of the second air inlet heat exchanger, the air supply fan is controlled to stop, and the exhaust fan operates at a first target rotating speed;

in the defrosting stage of the second air inlet heat exchanger, the air supply fan and the air exhaust fan all operate at a first target rotating speed.

In some embodiments of the application, the four-way valve includes an input port, a return port, a first port, and a second port;

the refrigerant outlet of the compressor is communicated with the input port, the backflow port is communicated with the refrigerant backflow port of the compressor, the first port is connected with the exhaust heat exchanger, the other end of the first air inlet heat exchanger is connected with the second port of the four-way valve, the first refrigerant branch is provided with the one-way valve and the control valve, the second branch is provided with the first expansion valve, and the third branch is provided with the second expansion valve.

In some embodiments of the present application, an air inlet channel is formed between the outdoor air inlet and the indoor air outlet for delivering outdoor fresh air, and an air exhaust channel is formed between the indoor air return inlet and the outdoor air outlet for delivering indoor polluted air; the exhaust heat exchanger is arranged in the exhaust channel, and the first air inlet heat exchanger and the second air inlet heat exchanger are sequentially formed in the air inlet channel along the flowing direction of air flow.

In some embodiments of the present application, filters are connected to two sides of the first expansion valve and the second expansion valve, the first branch is connected to the third branch, and the check valve is used for controlling the refrigerant to flow from the exhaust heat exchanger to the first intake heat exchanger through the second expansion valve.

In some embodiments of the present application, an installation cavity is formed in the outer housing, and the installation cavity includes an outdoor air inlet area communicated with the outdoor air inlet, an outdoor air outlet area communicated with the outdoor air outlet, an indoor air supply area communicated with the indoor air supply opening, and an indoor air return area communicated with the indoor air return opening; the air inlet fan is positioned in the indoor air inlet area, and the air exhaust fan is positioned in the outdoor air exhaust area;

the indoor air return area is internally provided with an air exhaust air quantity adjusting device, and the air inlet air quantity adjusting device and the air exhaust air quantity adjusting device comprise a valve body shell, a valve port formed on the side wall of the valve body shell, and a wind shield rotatably connected to the valve port, wherein the wind shield is externally connected with a driving piece and used for driving the wind shield to control the opening and closing states of the valve port.

In some embodiments of the application, the air deflector is further configured to intercept a gas flow path between the outdoor air intake or the indoor air return and the heat exchange core when the valve port is fully opened;

in a full-heat mode of the full-heat exchanger, the air inlet and air quantity adjusting device and the wind shield in the indoor return air zone respectively open air flow paths among the outdoor air inlet, the indoor return air inlet and the heat exchange core;

The total heat exchanger is in an internal/external circulation mode, and the air inlet and air quantity adjusting device and the wind shield in the indoor return air zone are used for cutting off an air flow path among the outdoor air inlet, the indoor return air inlet and the heat exchange core body respectively.

In some embodiments of the present application, a purifying assembly is further disposed in the air inlet volume adjusting device and the air outlet volume adjusting device, the purifying assembly includes a support member detachably mounted in the valve body housing and a filter member angularly disposed in the support member, and a limiting portion for positioning the filter member is formed in the support member;

the support piece comprises a support bottom surface and support side walls positioned on two sides of the support bottom surface, the filter piece comprises an air inlet end surface and an air outlet end surface, the air inlet end surface is parallel to the air outlet end surface, and an included angle between the air inlet end surface and the support bottom surface is 30-80 degrees;

the limiting part comprises limiting ribs which are formed on the side wall of the supporting piece and extend towards the inner cavity of the supporting piece, and the inclination angle of each limiting rib is matched with the inclination angle of the filtering piece.

Compared with the prior art, the application has the advantages and positive effects that:

The application provides a self-cleaning method of a fresh air dehumidifying all-in-one machine, which has the advantages of compact integral structure, small volume and convenient installation; the energy recovery, fresh air and dehumidification functions are combined in the integrated machine, so that the energy utilization rate is high, and the energy is saved and the efficiency is high;

under the non-cooling dehumidification mode, the reheating of the outdoor high-temperature air flow is realized by recovering energy in the indoor polluted air and the air flow in a low-temperature state after outdoor cooling dehumidification, so that the reheating device for the air flow after cooling dehumidification is simplified, equipment is simplified, resources are saved, and the energy utilization rate is improved;

through the switching of different air conditioning modes, the air exhaust heat exchanger and the second air inlet heat exchanger realize frosting-defrosting-high-temperature three-stage treatment, realize the double effects of self-cleaning and high-temperature sterilization, reduce the workload of maintenance and cleaning the heat exchanger after being sold outside a factory, and are beneficial to improving the cleaning efficiency.

Other features and advantages of the present application will become apparent upon review of the detailed description of the application in conjunction with the drawings.

Drawings

In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings that are needed in the embodiments will be briefly described below, and it is obvious that the drawings in the following description are some embodiments of the present application, 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 flow chart of a self-cleaning method of a fresh air dehumidification integrated machine in the invention;

FIG. 2 is a schematic diagram of a selection flow of full heat mode or internal/external circulation mode in the frosting stage of the exhaust heat exchanger and the frosting stage of the second intake heat exchanger;

FIG. 3 is a schematic structural perspective view of an embodiment of the fresh air dehumidifying all-in-one machine according to the present invention;

FIG. 4 is a schematic structural plan view of an embodiment of the fresh air dehumidifying all-in-one machine according to the present invention;

fig. 5 is a schematic diagram of refrigerant transportation in a cooling mode of the fresh air dehumidifying integrated machine according to the present invention;

fig. 6 is a schematic diagram of refrigerant transportation in a fresh air dehumidification integrated machine-heating mode provided by the invention;

FIG. 7 is a third schematic diagram illustrating the refrigerant transportation in the non-cooling dehumidification mode according to the present invention;

FIG. 8 is a schematic diagram of the airflow process in a full-heat mode;

FIG. 9 is a second schematic diagram of the airflow process in the full-heat mode;

FIG. 10 is a schematic illustration of the flow through process in an internal/external circulation mode;

FIG. 11 is a schematic diagram of the structure of the intake air volume adjusting device and the exhaust air volume adjusting device;

FIG. 12 is a schematic view of a decontamination assembly installation;

fig. 13 is a schematic diagram showing a split structure of the intake air volume adjusting device and the exhaust air volume adjusting device;

FIG. 14 is a schematic view of a support structure;

FIG. 15 is a schematic view of the bottom structure of the support;

FIG. 16 is a schematic view of a filter and positioning member;

FIG. 17 is a schematic view of bypass damper position;

FIG. 18 is a schematic diagram of a side vent valve configuration;

FIG. 19 is a schematic view of airflow in bypass mode;

in the drawing the view of the figure,

100. an outer housing;

101. an outdoor air inlet area; 102. an outdoor exhaust area; 103. an indoor return air area; 104. an indoor air supply area;

110. an outdoor air inlet;

120. an outdoor air outlet;

130. an indoor air return port;

140. an indoor air supply port;

200. an exhaust air volume adjusting device;

300. a heat exchange core;

400. an exhaust fan;

500. an air inlet fan;

610. an exhaust heat exchanger;

620. a first air intake heat exchanger;

630. a second air inlet heat exchanger;

700. an air inlet quantity adjusting device;

710. a valve body housing; 711. an air flow input; 712. an air flow output end;

720. a wind deflector;

730. a valve port;

740. a purification assembly;

741. a support; 7411. a support bottom surface; 7412. a support sidewall; 7413. a limit part; 7414. a mounting port;

7415. a fixing hole; 7416. an interface;

742. a filter; 7421. a primary filter unit; 7422. a high-efficiency filtering part;

743. A positioning piece;

800. a compressor;

810. a four-way valve;

811. an input port; 812. A return port; 813. a first port; 814. a second port;

820. a second refrigerant branch; 821. a first expansion valve;

830. a first refrigerant branch; 831. a one-way valve; 832. an electromagnetic valve;

840. a third refrigerant branch; 841. a second expansion valve;

850. a filter;

900. a side vent valve;

910. a bypass air duct;

920. a switch valve; 921. a driving section; 922. and rotating the valve plate.

Detailed Description

The following description of the embodiments of the present application 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 application, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the application without making any inventive effort, are intended to be within the scope of the application.

In the description of the present application, 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 application 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 application.

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 application, unless otherwise indicated, the meaning of "a plurality" is two or more.

In the description of the present application, 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 either fixedly connected, detachably connected, or integrally connected, for example; may be mechanically coupled, directly coupled, or indirectly coupled via an intermediate medium. The specific meaning of the above terms in the present application will be understood in specific cases by those of ordinary skill in the art.

In the present application, unless expressly stated or limited otherwise, a first feature "above" or "below" a second feature may include both the first and second features being in direct contact, as well as the first and second features not being in direct contact but being in contact with each other through additional features therebetween. Moreover, a first feature being "above," "over" and "on" a second feature includes the first feature being directly above and obliquely above the second feature, or simply indicating that the first feature is higher in level than the second feature. The first feature being "under", "below" and "beneath" the second feature includes the first feature being directly under and obliquely below the second feature, or simply means that the first feature is less level than the second feature.

The following disclosure provides many different embodiments, or examples, for implementing different features of the invention. In order to simplify the present disclosure, components and arrangements of specific examples are described below. They are, of course, merely examples and are not intended to limit the invention. Furthermore, the present invention may repeat reference numerals and/or letters in the various examples, which are for the purpose of brevity and clarity, and which do not themselves indicate the relationship between the various embodiments and/or arrangements discussed.

The embodiment provides a fresh air conditioner which performs a cooling and heating cycle of the air conditioner by using a compressor, a condenser, an expansion valve and an evaporator. The refrigeration and heating cycle includes a series of processes involving compression, condensation, expansion and evaporation and supplying a refrigerant medium to the conditioned and heat exchanged air.

The compressor 800 compresses refrigerant gas in a low temperature and low pressure state and discharges the compressed refrigerant gas. The discharged refrigerant gas flows into the condenser. The condenser condenses the compressed refrigerant into a liquid phase, and heat is released to the surrounding environment through the condensation process.

The expansion valve expands the liquid-phase refrigerant in a high-temperature and high-pressure state condensed in the condenser into a low-pressure liquid-phase refrigerant. The evaporator evaporates the refrigerant expanded in the expansion valve and returns the refrigerant gas in a low temperature and low pressure state to the compressor 800. The evaporator may achieve a cooling effect by exchanging heat with a material to be cooled using latent heat of evaporation of a refrigerant. The air conditioner may adjust the temperature of the indoor space throughout the cycle.

The outdoor unit of the air conditioner refers to a portion of a refrigeration cycle including a compressor, an exhaust heat exchanger, and an exhaust fan, the indoor unit of the air conditioner includes portions of an intake heat exchanger and an intake fan, and a throttling device (e.g., a capillary tube or an electronic expansion valve) may be provided in the indoor unit or the outdoor unit.

The intake air heat exchanger and the exhaust air heat exchanger are used as a condenser or an evaporator. The air conditioner performs a heating mode when the intake air heat exchanger is used as a condenser, and performs a cooling mode when the intake air heat exchanger is used as an evaporator.

The air intake heat exchanger and the air exhaust heat exchanger 610 are converted into a condenser or an evaporator, and a four-way valve 810 is generally adopted, and the details of the arrangement of a conventional air conditioner are specifically referred to and will not be described herein.

The refrigeration working principle of the air conditioner is as follows: the compressor 800 works to make the interior of the air intake heat exchanger (in the indoor unit, at this time, the evaporator) in an ultra-low pressure state, the liquid refrigerant in the air intake heat exchanger rapidly evaporates and absorbs heat, the air blown out by the indoor fan is cooled by the coil pipe of the air intake heat exchanger and then changed into cold air to be blown into the room, the evaporated refrigerant is pressurized by the compressor 800 and then condensed into liquid state in the high-pressure environment in the air exhaust heat exchanger 610 (in the outdoor unit, at this time, the condenser) to release heat, the heat is emitted into the atmosphere by the air exhaust fan, and the refrigerating effect is achieved by circulation.

The heating working principle of the air conditioner is as follows: the gaseous refrigerant is pressurized by the compressor 800 to become high-temperature and high-pressure gas, and enters the air inlet heat exchanger (a condenser at this time), and is condensed, liquefied and released heat to become liquid, and meanwhile, the indoor air is heated, so that the aim of increasing the indoor temperature is fulfilled. The liquid refrigerant is depressurized by the throttling device, enters the exhaust heat exchanger 610 (an evaporator at this time), evaporates and gasifies to absorb heat, becomes gas, absorbs heat of the outdoor air (the outdoor air becomes colder) and becomes a gaseous refrigerant, and enters the compressor 800 again to start the next cycle.

Referring to fig. 3 and 4, the application provides a self-cleaning method of a fresh air dehumidifying all-in-one machine, wherein the fresh air dehumidifying all-in-one machine comprises a total heat exchanger and a heat pump refrigerant system, and the total heat exchanger comprises an outer shell 100 and a heat exchange core 300 arranged in the outer shell 100.

The outer case 100 is formed with an outdoor air inlet 110, an outdoor air outlet 120, an indoor air outlet 140, and an indoor air return 130.

An installation cavity is formed in the outer casing 100 for installing working components such as each heat exchanger and the compressor 800, and the installation cavity comprises an outdoor air inlet area 101 communicated with an outdoor air inlet 110, an outdoor air outlet area 102 communicated with an outdoor air outlet 120, an indoor air supply area 104 communicated with an indoor air supply outlet 140 and an indoor air return area 103 communicated with an indoor air return outlet 130.

The heat exchange core 300 is a key component of the total heat exchanger, and is used for exchanging heat between indoor polluted air and outdoor fresh air, and the heat exchange core 300 is generally configured with a first air flow channel (not labeled) for exhausting air to the outdoor side, and a second air flow channel for introducing the outdoor fresh air into the indoor, wherein heat transfer can be performed between the first air flow channel and the second air flow channel.

Meanwhile, in order to meet the indoor and outdoor air flowing requirement, an air inlet fan 500 and an air exhaust fan 400 are arranged in the housing, the air inlet fan 500 is arranged in the indoor air inlet area and used for driving outdoor fresh air to be input into the room from the indoor air supply port 140, and the air exhaust fan 400 is arranged in the outdoor air exhaust area 102 and used for driving indoor polluted air to be output out of the room from the outdoor air exhaust port 120.

Outdoor fresh air enters the outer shell 100 from the outdoor air inlet 110 and is input indoors through the indoor air supply outlet 140, indoor dirty air enters the outer shell 100 from the indoor air return outlet 130 and is output outdoors through the outdoor air outlet 120, and indoor dirty air and outdoor fresh air selectively pass through the heat exchange core 300 and exchange heat in the heat exchange core 300.

Referring to fig. 5-7, the heat pump refrigerant system includes a compressor 800, a four-way valve 810, an exhaust heat exchanger 610, a first inlet air heat exchanger 620, and a second inlet air heat exchanger 630 connected together by refrigerant lines.

An air inlet channel is formed between the outdoor air inlet 110 and the indoor air outlet 140 for delivering outdoor fresh air, and an air exhaust channel is formed between the indoor air return 130 and the outdoor air outlet 120 for delivering indoor polluted air.

The exhaust heat exchanger 610 is disposed in the exhaust passage, and the first and second inlet heat exchangers 620 and 630 are sequentially formed in the inlet passage along the flow direction of the air flow.

The four-way valve 810 comprises an input port 811, a return port 812, a first port 813 and a second port 814, and different working states of each air inlet heat exchanger and each air outlet heat exchanger 610 are realized by switching the communication relation between the input port 811 and the first port 813 or the second port 814, so that the purpose of refrigerating or heating is achieved.

The refrigerant output port of the compressor 800 communicates with the input port 811, the return port 812 communicates with the refrigerant return port of the compressor 800, and the first port 813 is connected to the exhaust heat exchanger 610.

The other end of the exhaust heat exchanger 610 is connected to the first inlet heat exchanger 620 through a first refrigerant branch 830, and to the second inlet heat exchanger 630 through a second refrigerant branch 820, respectively.

The other end of the first air intake heat exchanger 620 is connected to the second port 814 of the four-way valve 810, and the first air intake heat exchanger 620 is connected to the second air intake heat exchanger 630 through a third refrigerant branch 840.

The first refrigerant branch 830 is provided with a check valve 831 and a solenoid valve 832, the second branch is provided with a first expansion valve 821, and the third refrigerant branch 840 is provided with a second expansion valve 841.

The first expansion valve 821 and the second expansion valve 841 are respectively connected to two sides thereof with a filter 850 for filtering impurities doped in the refrigerant, thereby preventing the expansion valve from being blocked.

One end of the first refrigerant branch 830 connected to the first air inlet heat exchanger 620 is connected to the third refrigerant branch 840, and the check valve 831 is used for controlling the refrigerant to flow from the air exhaust heat exchanger 610 to the first air inlet heat exchanger 620 through the second expansion valve 841.

Fig. 1 is a flowchart illustrating a self-cleaning control method of an air conditioner according to an embodiment of the present invention.

The self-cleaning control method of the fresh air dehumidification integrated machine provided by the embodiment of the invention comprises the following steps of:

s: in response to a self-cleaning instruction for the fresh air dehumidification integrated machine, a continuous self-cleaning mode is entered, wherein the self-cleaning mode comprises at least one self-cleaning stage, and the number of the self-cleaning stages can be selected by a user according to the actual requirement of the user.

The respective cleaning stages sequentially comprise a pretreatment stage, a frosting stage of the exhaust heat exchanger 610, a frosting stage of the second air inlet heat exchanger 630 and a frosting stage of the second air inlet heat exchanger 630, and each stage contained in the self-cleaning stage sequentially operates for a preset time.

Defining the running time of the pretreatment stage as T; the operation time of the frosting stage of the exhaust heat exchanger 610 is T; the self-cleaning mode includes at least one self-cleaning phase having a run time T; the second inlet air heat exchanger 630 has a defrosting phase run time T.

Pretreatment stage-

Specifically, with reference to fig. 5 and 10, in the pretreatment stage, the heat pump refrigerant system operates in a refrigeration mode, and the total heat exchanger is in an internal/external circulation mode; the blower fan is controlled to stop and the exhaust fan 400 is operated at a first target rotational speed.

In the refrigeration condition, the input port 811 communicates with the first port 813, the second expansion valve 841 is opened, the first expansion valve 821 is closed, the solenoid valve 832 is opened, and at this time, the first refrigerant branch 830 is opened, and the second air intake heat exchanger 630 is closed.

In the heat pump refrigerant system, the high-temperature and high-pressure refrigerant output by the compressor 800 is conveyed to the exhaust heat exchanger 610 through the four-way valve 810, at this time, the exhaust heat exchanger 610 is used as a condenser, the first inlet heat exchanger 620 is used as an evaporator, the refrigerant sequentially releases heat in the exhaust heat exchanger 610 and then enters the first refrigerant branch 830, flows through the electromagnetic valve 832 and the one-way valve 831 on the first refrigerant branch 830, then enters the first inlet heat exchanger 620 after being throttled by the second expansion valve 841, and after absorbing heat in the first inlet heat exchanger 620, is conveyed back to the compressor 800 through the second port 814 and the return port 812 of the four-way valve 810, so that one-time refrigerant circulation is completed.

In the internal/external circulation mode of the total heat exchanger, since the air supply fan stops working, the indoor contaminated air does not participate in circulation, and the air exhaust fan 400 is operated at a first target rotational speed, which is preferably the highest rotational speed of the air exhaust fan 400.

At the first target rotation speed, the outdoor fresh air flows through the exhaust heat exchanger 610 at a high air speed, and the high-temperature and high-pressure refrigerant is transferred to the exhaust heat exchanger 610 and is converted into a liquid refrigerant in the exhaust heat exchanger 610, and the liquid refrigerant is gathered in the exhaust heat exchanger 610, so that the liquid refrigerant in the exhaust heat exchanger 610 at the lower stage is evaporated and frosted.

Frosting stage of exhaust heat exchanger 610)

Referring to fig. 6, 8-10, in the frosting stage of the exhaust heat exchanger 610, the heat pump refrigerant system operates in a heating mode, and the total heat exchanger is in a total heat mode or an internal/external circulation mode; the blower fan and the exhaust fan 400 are both operated at a first target rotational speed.

The input port 811 of the four-way valve 810 is communicated with the second port 814, the second expansion valve 841 is opened to the maximum, the first air intake heat exchanger 620 and the second air intake heat exchanger 630 are in a series connection state, the first expansion valve 821 is opened, and the first refrigerant branch 830 is in a disconnection state under the action of the one-way valve 831.

The high-temperature and high-pressure refrigerant is input into the second air inlet heat exchanger 630 through the second port 814 of the four-way valve 810, at this time, the first air inlet heat exchanger 620 and the second air inlet heat exchanger 630 are used as condensers, the air outlet heat exchanger 610 is used as an evaporator, the refrigerant is sequentially released in the first air inlet heat exchanger 620 and the second air inlet heat exchanger 630, absorbs heat in the air outlet heat exchanger 610, and then is input back into the compressor 800 through the first port 813 and the backflow port 812 of the four-way valve 810, so that one-time refrigerant circulation is completed.

The total heat exchanger is selected from a total heat mode or an internal/external circulation mode, and is determined by outdoor environment temperature, indoor CO2 concentration and outdoor PM2.5 concentration.

The indoor thermometer and the CO2 concentration monitoring device are arranged, the PM2.5 concentration detection device is arranged outdoors, and the thermometer, the CO2 concentration monitoring device and the PM2.5 concentration detection device are all connected with a controller in the fresh air dehumidification all-in-one machine.

As shown in fig. 2, specifically, when the outdoor ambient temperature is greater than a preset temperature threshold (i.e., T > T0), at this time, the outdoor temperature is too high, and the total heat exchanger starts the internal/external circulation mode during the frosting phase of the exhaust heat exchanger 610;

when the outdoor environment temperature is not greater than a preset temperature threshold (namely T is less than or equal to T0), judging the concentration of CO2 in the room:

When the indoor CO2 concentration is greater than the CO2 concentration threshold (namely M > M0), the indoor CO2 concentration is too high at the moment, circulation with external connection is needed, and the total heat exchanger enters a total heat mode;

when the indoor CO2 concentration is not more than the CO2 concentration threshold value (namely M is less than or equal to M0), judging the outdoor PM2.5 concentration:

when the outdoor PM2.5 concentration is greater than the PM2.5 concentration threshold (i.e. m > m 0), the outdoor temperature pollution is heavy, and the total heat exchanger enters an inner/outer circulation mode;

when the outdoor PM2.5 concentration is not more than the PM2.5 concentration threshold (namely m is less than or equal to m 0), the total heat exchanger enters a total heat mode.

Specific values of the preset temperature threshold T0, the CO2 concentration threshold M0 and the PM2.5 concentration threshold M0 may be determined according to practical situations of the user environment, for example, the preset temperature threshold T0 is set to 30 degrees, the CO2 concentration threshold M0 is 1000ppm, and the PM2.5 concentration threshold M0 is 115 μg/M.

The purpose of the frosting stage of the air exhaust heat exchanger 610 is to fully evaporate and absorb heat for the liquid refrigerant in the air exhaust heat exchanger 610 to perform frosting.

Defrosting of the exhaust heat exchanger 610-frosting of the second intake heat exchanger 630 >

Referring to fig. 5 and 10, the heat pump refrigerant system operates in a cooling mode, the total heat exchanger is in an internal/external circulation mode, the air supply fan is controlled to stop, and the air exhaust fan 400 operates at a first target rotational speed.

The stage is to defrost the exhaust heat exchanger 610 and dry at high temperature, and the second intake heat exchanger 630 is frosted, and in this stage, the refrigerant transmission path is similar to the pretreatment stage, and will not be described here again.

Second air intake heat exchanger 630 defrosting >

In the defrosting stage of the second air intake heat exchanger 630, referring to fig. 6 and 8-10, the heat pump refrigerant system operates in a heating mode, the total heat exchanger is in a total heat mode or an internal/external circulation mode, the air supply fan and the air exhaust fan 400 both operate at a first target rotation speed, and the stage is that the third heat exchanger performs defrosting and high-temperature drying.

The total heat exchanger is selected from a total heat mode or an internal/external circulation mode, and is determined by an outdoor ambient temperature, an indoor CO2 concentration and an outdoor PM2.5 concentration, and a specific selection process is similar to the frosting stage of the exhaust heat exchanger 610, which is not described herein.

The outdoor air inlet area 101 is internally provided with an air inlet quantity adjusting device 700, the indoor air return area 103 is internally provided with an air outlet quantity adjusting device 200, the air inlet quantity adjusting device 700 and the air outlet quantity adjusting device 200 comprise a valve body shell 710, a valve port 730 formed on the side wall of the valve body shell 710, a wind shield 720 rotatably connected to the valve port 730, and a driving piece is externally connected to the wind shield 720 and used for driving the wind shield 720 to control the opening and closing states of the valve port 730.

As shown in fig. 11-16, in some embodiments of the present application, an intake air volume adjusting device 700 is disposed in the outdoor intake area 101, an exhaust air volume adjusting device 200 is disposed in the indoor return area 103, the intake air volume adjusting device 700 is connected between the outdoor intake 110 and the heat exchange core 300, and the exhaust air volume adjusting device 200 is disposed between the indoor return 130 and the heat exchange core 300.

The air intake volume adjusting device 700 and the air exhaust volume adjusting device 200 each comprise a valve body shell 710, a valve port 730 formed on the side wall of the valve body shell 710, and a wind shield 720 rotatably connected to the valve port 730, wherein the wind shield 720 is externally connected with a driving member for driving the wind shield 720 to control the opening and closing states of the valve port 730.

The wind deflector 720 is also used for cutting off a gas flow path between the outdoor air inlet 110 or the indoor air return 130 and the heat exchange core 300 when the valve port 730 is completely opened, that is, cutting off a path between the outdoor air inlet 110 and the heat exchange core 300 in a vertical state of the wind deflector 720 in the air inlet volume adjusting device 700, and cutting off a path between the indoor air return 130 and the heat exchange core 300 in a vertical state of the wind deflector 720 in the air outlet volume adjusting device 200.

In the full-heat exchanger entering the full-heat mode, the wind shield 720 is in a horizontal state in the drawing, the valve port 730 is completely closed, that is, the passage between the outdoor air inlet 110 and the heat exchange core 300 is fully opened, and the passage between the indoor air return 130 and the heat exchange core 300 is fully opened.

In the internal/external circulation mode of the total heat exchanger, the wind guard 720 rotates to be in a vertical state in the drawing, the opening of the valve port 730 is maximum, and the wind guard 720 cuts off the passage between the outdoor air inlet 110 and the heat exchange core 300, and the indoor air return 130 cuts off the passage between the heat exchange core 300.

In some embodiments of the present application, the air intake volume adjusting device 700 and the air exhaust volume adjusting device 200 are further provided with a purifying assembly 740, wherein the purifying assembly 740 comprises a valve body housing 710, a support member 741 detachably installed in the valve body housing 710, and a filter member 742 angularly disposed in the support member 741, and a limiting portion 7413 for positioning the filter member 742 is formed in the support member 741.

Referring to fig. 11, the valve body housing 710 includes an air flow input end 711 and an air flow output end 712, wherein a tapered air flow channel is formed on the air flow input end 711 along the air flow direction, and a filter 742 is positioned at the end of the air flow channel, so that the air flow is intensively conveyed into the filter 742 for filtering.

As shown, the supporting member 741 is generally U-shaped and specifically includes a supporting bottom surface 7411 and supporting side walls 7412 disposed on two sides of the supporting bottom surface 7411, the supporting bottom surface 7411 is used for supporting the filter 742, and the supporting side walls 7412 are provided with a limiting portion 7413 for limiting the filter 742.

Referring again to fig. 12-14, the filter 742 includes an air inlet end face and an air outlet end face, the air inlet end face is parallel to the air outlet end face, the cross-sectional shape of the filter 742 is parallelogram along the air flow direction, and the included angle α between the air inlet end face and the support bottom surface 7411 is in degrees to degrees.

The inclination angle between the conventional air inlet end surface and the supporting bottom surface 7411 is a right angle, and by changing the inclination angle between the air inlet end surface and the supporting bottom surface 7411, the filtering area of the air flow passing through the filtering piece 742 is increased, which is beneficial to reducing the occupied space of the filtering piece 742 in the air conditioner and plays a key role in reducing the overall height of the product.

Referring again to fig. 14, the limiting portion 7413 specifically includes a plurality of limiting ribs formed on the sidewalls of the supporting member 741 at both sides and extending toward the inner cavity of the supporting member 741, and an inclination angle of each of the limiting ribs is adapted to an inclination angle of the filtering member 742.

The dimension between two adjacent spacing ribs on the same support 741 is adapted to the length of the filter 742 in the direction of airflow, i.e. the filter 742 is mounted between the two spacing ribs.

Referring again to fig. 16, the filter 742 specifically includes a primary filter portion 7421 and a high-efficiency filter portion 7422, the primary filter portion 7421 and the high-efficiency filter portion 7422 being disposed in sequence along the airflow direction, the primary filter portion 7421 being for filtering particulate dust and suspended matter having a particle size greater than μm; for filtering particulate dust and suspended matter having a particle size of not more than mu m.

The primary filter 7421 comprises a primary air inlet end face, a primary air outlet end face and a primary bottom face, the primary bottom face is in contact connection with the supporting bottom plate, and air flow is input from the primary air inlet end face, is filtered by the primary filter 7421, and is output from the primary air outlet end face.

Specifically, the efficient filter portion 7422 includes an efficient air inlet end face, an efficient air outlet end face, and an efficient bottom face, and the air flow output from the primary air outlet end face is input into the efficient filter portion 7422 from the efficient air inlet end face, and is output from the efficient air outlet end face after being filtered by the efficient filter portion 7422.

In addition, a positioning member 743 is further formed between the primary filter portion 7421 and the efficient filter portion 7422, for supporting the primary filter portion 7421 and the efficient filter portion 7422 in an auxiliary manner, and facilitating the assembly and disassembly of the primary filter portion 7421 and the efficient filter portion 7422.

The support bottom surface 7411 is formed with mounting openings 7414, and the width of the mounting openings 7414 is adapted to the width of the entire support bottom surface 7411, whereby the primary filter portion 7421 and the high-efficiency filter portion 7422 are mounted to or dismounted from the mounting openings 7414 into the support member 741.

As shown in fig. 15, the mounting hole 7414 has a socket 7416 and a fixing hole 7415 formed at each end of the mounting hole 7414 along the air flow direction, and the positioning member 7413 is detachably connected to the support bottom 7411 and has a mounting position that matches the mounting hole 7414.

Specifically, as shown in fig. 15 and 16, the positioning member 743 includes a connection plate and a positioning projection formed on a surface of the connection plate, and in the mounted state, the positioning projection extends from a position of the mounting port 7414 to above the support bottom surface 7411.

The both sides of location arch are formed with first location inclined plane and second location inclined plane, and under the installed state, first location inclined plane is connected with high-efficient air inlet terminal surface contact, and the second location inclined plane is connected with first effect bottom surface contact.

Further, in order to realize detachable connection with the supporting bottom plate, one end of the connecting plate is formed with a plug-in connection part, and the other end is formed with a connecting hole.

In the mounted state, the insertion portion of the connection plate is inserted into the insertion port 7416, and the connection hole at the other end is fixed to the fixing hole 7415 by a fastener.

The section shape of the primary filter 7421 along the air flow direction is rectangular or parallelogram, and a wind shielding part is arranged above the support piece 741 and is positioned above the primary air inlet end face for ensuring that the air flow is completely input from the primary air inlet end face.

The valve body housing 710 has an installation cavity formed therein, and a support 741 to which the filter 742 is previously installed is detachably coupled to the valve body housing 710 along a length direction of the installation cavity.

Specifically, the primary filter portion 7421 and the high-efficiency filter portion 7422 are first mounted in the support member 741 from the mounting hole 7414 of the support bottom surface 7411, and the mounting direction thereof is regulated by the regulating portion 7413.

Then, the positioning member 743 is fixed to the lower surface of the support bottom surface 7411, and the positioning projections are provided between the primary filter portion 7421 and the high-efficiency filter portion 7422, so that the primary filter portion 7421 and the high-efficiency filter portion 7422 are supported and fixed, and the attachment and fixation of the primary filter portion 7421 and the high-efficiency filter portion 7422 to the support member 741 are completed.

As shown in fig. 17-19, in other embodiments of the present application, a bypass valve 900 is further disposed beside the intake air volume regulator 700, for controlling the direct communication between the outdoor intake area 101 and the indoor intake area, where the bypass valve 900 includes a bypass duct 910 and a switch valve 920 located in the bypass duct 910, and when the valve port 730 on the intake air volume regulator 700 is opened, the outdoor fresh air is directly delivered into the indoor intake area through the valve port 730 and the bypass valve 900.

The switching valve 920 includes a driving part 921 and a rotary valve plate 922 connected to an output end of the driving part 921, and a rotation center of the rotary valve plate 922 is perpendicular to a flow direction of the air passing through the bypass duct 910.

Specifically, the bypass air valve 900 includes a bypass air duct 910 and a switch valve 920 located in the bypass air duct 910, an air inlet of the bypass air duct 910 is communicated with the outdoor air duct, an air outlet is communicated with the indoor return air area 103, after the switch valve 920 in the bypass air duct 910 is opened, outdoor fresh air is directly conveyed to the indoor return air area 103 from the outdoor air duct through the bypass air duct 910, and is conveyed to the indoor air supply area 104 from the indoor return air area 103 through the second air inlet heat exchanger, so that the direct communication between the outdoor air supply area and the second air inlet heat exchanger is realized.

The air channel between the air inlet and the air outlet of the bypass air channel 910 is in a gradually-expanding shape, the switch valve 920 is located at one side of the air outlet of the bypass air channel 910, and the switch valve 920 specifically includes a driving part 921 and a rotary valve plate 922 connected with the output end of the driving part 921.

The rotation center of the rotary valve plate 922 is perpendicular to the airflow direction passing through the bypass duct 910.

In the bypass mode, the driving portion 921 is located below the bypass air duct 910, and the output shaft of the driving portion 921 extends downward perpendicular to the bypass air duct 910, and the driving portion 921 is opened to drive the output shaft to rotate, thereby driving the rotary valve plate 922 to rotate by a certain angle, and opening the bypass air duct 910.

The fresh air dehumidifying all-in-one machine related to the application has a bypass mode and a non-cooling dehumidifying mode besides a full-heating mode and an internal/external circulation mode which are opened in a self-cleaning mode:

< bypass mode >

In the bypass mode, the wind screen 720 of the air intake air volume adjusting device 700 is in a vertical state, the wind screen 720 in the air exhaust air volume adjusting device 200 is in a horizontal state, the heat exchange core 300 is communicated with the air exhaust channel, and the side ventilation valve 900 is opened.

Outdoor air is input into the outdoor air duct from the outdoor air inlet 110, is filtered by the primary filter screen and the high-efficiency filter screen, is conveyed to the first air inlet heat exchanger 620 from the bypass air valve 900, is conveyed to the indoor from the indoor air supply port 140 after passing through the second air inlet heat exchanger 630 and is guided by the air inlet fan 500, namely, in the mode, outdoor fresh air is directly introduced into the indoor without passing through the heat exchange core 300.

Indoor dirty air enters the indoor channel from the indoor air return port 130, passes through the indoor filter screen and then is conveyed into the heat exchange core 300, and the indoor dirty air output from the heat exchange core 300 is discharged outdoors from the outdoor air outlet 120 through the air exhaust heat exchanger 610, and in this mode, no heat exchange occurs between fresh air and dirty air in the heat exchange core 300.

Non-cooling dehumidification mode)

Referring to fig. 7, in the non-cooling dehumidification and constant-temperature dehumidification processes, the input port 811 is communicated with the first port 813, the first expansion valve 821 and the second expansion valve 841 are opened, the solenoid valve 832 located on the first refrigerant branch 830 is closed, and the first refrigerant branch 830 is cut off.

The high-temperature and high-pressure refrigerant is output from the compressor 800, flows through the exhaust heat exchanger 610 and the second intake heat exchanger 630 through the four-way valve 810 to release heat (at this time, the maximum opening of the first expansion valve 821 does not play a role in throttling), and enters the first intake heat exchanger 620 to absorb heat after being throttled by the first expansion valve 821, and then returns to the compressor 800 to complete circulation.

At this time, the indoor contaminated air and the indoor contaminated air circulate from the heat exchange core 300, the first heat recovery is completed in the heat exchange core 300, the heat of the indoor contaminated air is increased, the heat of the outdoor fresh air is reduced, the increased indoor contaminated air passes through the exhaust heat exchanger 610, the temperature is further increased after absorbing the heat of the exhaust heat exchanger 610, and then the indoor contaminated air is discharged outdoors.

After the outdoor fresh air is subjected to heat exchange and cooling with indoor polluted air at the heat exchange core 300, the temperature is reduced and dehumidified through the first air inlet heat exchanger 620, and after the temperature is reduced and dehumidified, the outdoor fresh air is further heated through the second air exhaust heat exchanger 610, so that the proper temperature is reached, the fresh air is output to the indoor space, and the comfort level of a user is improved.

The fresh air dehumidifying all-in-one machine structure has the function of energy recovery while achieving the purpose of self-cleaning of the exhaust heat exchanger and the second air inlet heat exchanger.

Specifically, in the cooling mode, in the process that the indoor dirty air is introduced into the heat exchange core 300 through the exhaust fan 400 to exchange heat with the outdoor fresh air, the heat load of the outdoor fresh air is transferred to the indoor dirty air, so that the temperature of the outdoor fresh air is reduced, and the heat load of an air conditioning system is reduced; the indoor contaminated air outputted from the heat exchange core 300 is still lower than the outdoor temperature, and the indoor contaminated air is discharged to the outside again through the exhaust heat exchanger 610 (condenser) taking more heat load, thereby reducing the heat load of the air conditioning system again.

In the heating mode, the indoor dirty air is introduced into the heat exchange core 300 through the exhaust fan 400 to exchange heat with the outdoor fresh air, and the cold load of the outdoor fresh air is transferred to the indoor dirty air, so that the temperature of the outdoor fresh air is increased, and the cold load of an air conditioning system is reduced; the indoor contaminated air outputted from the heat exchange core 300 is still higher than the outdoor temperature, and the indoor contaminated air is discharged to the outside again through the air discharge heat exchanger 610 (evaporator) taking more cool load, and the cool load of the air conditioning system is reduced again.

Under the cooling-free dehumidification mode, indoor dirty air and indoor dirty air circulate from the heat exchange core 300, accomplish the first heat recovery in the heat exchange core 300, indoor dirty air heat is risen, outdoor fresh air heat is reduced, indoor dirty air after rising passes through the heat exchanger 610 of airing exhaust, absorbs after the heat of heat exchanger 610 department of airing exhaust, and the temperature is further risen, and then, the outdoor, is discharged, is favorable to saving the resource source, improves energy utilization.

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 foregoing is merely illustrative embodiments of the present invention, and the scope of 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 covered by the present invention, and the scope of the present invention shall be defined by the appended claims.

Claims

1. A self-cleaning method of a fresh air dehumidifying integrated machine is characterized in that,

fresh air dehumidification all-in-one includes:

The self-cleaning method comprises the following steps:

2. The self-cleaning method of the fresh air dehumidifying all-in-one machine according to claim 1, which is characterized in that,

after the fresh air dehumidification integrated machine enters a self-cleaning mode, acquiring outdoor environment temperature, indoor CO2 concentration and outdoor PM2.5 concentration, and sequentially determining that the total heat exchanger is started in a total heat mode or an internal/external circulation mode in an exhaust heat exchanger frosting stage and a second air inlet heat exchanger frosting stage according to the outdoor environment temperature, the indoor CO2 concentration and the outdoor PM2.5 concentration.

3. The self-cleaning method of the fresh air dehumidifying all-in-one machine according to claim 2, which is characterized in that,

when the outdoor environment temperature is greater than a preset temperature threshold value, the total heat exchanger starts an internal/external circulation mode in the defrosting stage of the exhaust heat exchanger and the defrosting stage of the second inlet heat exchanger;

4. The self-cleaning method of the fresh air dehumidifying all-in-one machine according to claim 1, which is characterized in that,

in the pretreatment stage, controlling the air supply fan to stop, and operating the air exhaust fan at a first target rotating speed;

5. The self-cleaning method of the fresh air dehumidifying all-in-one machine according to claim 1, which is characterized in that,

the four-way valve comprises an input port, a backflow port, a first port and a second port;

6. The self-cleaning method of the fresh air dehumidifying all-in-one machine according to claim 1, which is characterized in that,

an air inlet channel is formed between the outdoor air inlet and the indoor air supply outlet and used for conveying outdoor fresh air, and an air exhaust channel is formed between the indoor air return outlet and the outdoor air exhaust outlet and used for conveying indoor polluted air; the exhaust heat exchanger is arranged in the exhaust channel, and the first air inlet heat exchanger and the second air inlet heat exchanger are sequentially formed in the air inlet channel along the flowing direction of air flow.

7. The fresh air dehumidifying all-in-one machine according to claim 5, wherein,

the two sides of the first expansion valve and the second expansion valve are respectively connected with a filter, the first branch is connected to the third branch, and the one-way valve is used for controlling the refrigerant to flow from the exhaust heat exchanger to the first air inlet heat exchanger through the second expansion valve.

8. The fresh air dehumidifying all-in-one machine according to claim 1, wherein,

the outer shell is internally provided with an installation cavity, and the installation cavity comprises an outdoor air inlet area communicated with the outdoor air inlet, an outdoor air exhaust area communicated with the outdoor air outlet, an indoor air supply area communicated with the indoor air supply outlet and an indoor air return area communicated with the indoor air return outlet; the air inlet fan is positioned in the indoor air inlet area, and the air exhaust fan is positioned in the outdoor air exhaust area;

9. The fresh air dehumidifying all-in-one machine according to claim 8, wherein,

the wind shield is also used for cutting off a gas flow path between the outdoor air inlet or the indoor air return inlet and the heat exchange core body when the valve port is completely opened;

10. The fresh air dehumidifying all-in-one machine according to claim 8, wherein,

the air inlet and air quantity adjusting device and the air outlet and air quantity adjusting device are internally provided with a purifying component, the purifying component comprises a supporting piece which is detachably arranged in the valve body shell and a filtering piece which is arranged in the supporting piece in an angle way, and a limiting part for positioning the filtering piece is formed in the supporting piece;