Fresh air conditioner

Abstract

An air exhaust channel with an indoor air exhaust port located at the upper end of the left side of the shell and an outdoor air exhaust port located at the lower end of the right side of the shell is arranged in the shell, and a fresh air channel with an outdoor fresh air port located at the upper end of the right side of the shell and an indoor air supply port located at the lower end of the left side of the shell is arranged in the shell. The junction of the exhaust channel and the fresh air channel is connected with a cross-flow plate type heat exchanger installed in an inner cavity of the shell, and air in the exhaust channel and air in the fresh air channel are subjected to heat exchange through the cross-flow plate type heat exchanger. A filtering and purifying assembly used for purifying air entering the exhaust channel and the fresh air channel is arranged in the shell. Energy exhausted by indoor air in the fresh air exchange and refrigeration / heating process is recovered, energy recovery is achieved from three aspects, energy is saved to the maximum extent when the fresh air exchange and refrigeration / heating functions are achieved, the oil mist and dust purification treatment effect is good, and the fresh air quality is improved.

Description

Technical Field

[0001] The present invention belongs to the technical field of air conditioners, and in particular relates to a fresh air air conditioner. Background Art

[0002] Currently, range hoods on the market have high exhaust volumes, exhausting all air from the kitchen in just two minutes. However, since kitchens are mostly enclosed, without replenished air, they create a severe negative pressure. This leads to severe oxygen deprivation, making it difficult for cooks to breathe, and without sufficient oxygen to support combustion, incomplete combustion on the stove can produce severe carbon monoxide pollution. Opening doors and windows can also lead to significant energy loss for heating and cooling. With the growing demand for fresh air, the demand for fresh air air conditioners is also increasing. However, in work environments like industrial machining and kitchens, where oil mist may be generated, oil mist easily adheres to key components such as the air conditioner's condenser and evaporator, impacting heat exchange efficiency and reducing cooling effectiveness. Furthermore, these work environments prioritize ventilation. During the spring and autumn months, when continuous ventilation is required, most fresh air air conditioners cannot be activated independently. Even those that can be activated independently lack heat exchange functions, and when there is a temperature difference between indoor and outdoor, ventilation significantly impacts indoor temperature. Therefore, improvements are necessary to address these issues. Summary of the Invention

[0003] The technical problem solved by the present invention is to provide a fresh air air conditioner, which optimizes the air conditioner structure, recovers the energy discharged by the indoor gas during the fresh air ventilation and cooling / heating processes, realizes energy recovery from three levels, and achieves maximum energy saving during the fresh air ventilation and cooling / heating functions. In addition, the air discharged from the exhaust duct is purified of oil mist and dust through the filtering and purification component, and the fresh air sent into the fresh air duct is dust-removed and dried, thereby reducing the impact of the exhausted air on the surrounding environment, avoiding the discharge of oil pollution into the outdoor air, making a contribution to achieving blue sky and green water, and improving the quality of fresh air. It has a simple structure, novel design, low energy consumption, rich working modes, and high use value.

[0004] The technical solution adopted by the present invention is: a fresh air air conditioner, comprising a shell, an exhaust duct provided inside the shell with an indoor exhaust port located at the upper left end of the shell and an outdoor exhaust port located at the lower right end of the shell, a fresh air duct provided inside the shell with an outdoor fresh air port located at the upper right end of the shell and an indoor supply air port located at the lower left end of the shell, the intersection of the exhaust duct and the fresh air duct are respectively connected to the cross-flow plate heat exchanger installed in the inner cavity of the shell, and the wind in the exhaust duct and the fresh air duct are both heat-exchanged through the cross-flow plate heat exchanger; a filtering and purification component for purifying the air entering the exhaust duct and the fresh air duct is provided inside the shell, a refrigerant flow control system including a compressor, a condenser, an evaporator and a supply side reheater is provided inside the shell, and the fresh air delivered to the room through the indoor supply port is cooled / heated by the refrigerant flow control system.

[0005] The refrigerant flow control system further includes a four-way reversing valve and a three-way regulating valve. The compressor outlet is connected to the condenser inlet via a pipe connected to two interfaces of the four-way reversing valve. The condenser outlet is connected between the one-way valve 1 and the one-way valve 2 for single-phase conduction via a pipe equipped with a three-way regulating valve. The air supply side reheater connected to the condenser input end and the three-way regulating valve is connected in parallel with the condenser, and the on-off and opening degree of the condenser and the air supply side reheater are controlled by the three-way regulating valve. The inlet end of the one-way valve one and the outlet end of the one-way valve two are connected to the pipeline on which the one-way valve three and the one-way valve four are installed, and the inlet end of the liquid reservoir is connected to the pipeline between the outlet end of the one-way valve four and the outlet end of the one-way valve two, the outlet end of the liquid reservoir is connected between the inlet end of the one-way valve one and the inlet end of the one-way valve three through an electronic expander, one end of the evaporator is connected between the one-way valve three and the one-way valve four, and the other end of the evaporator is connected to the inlet end of the compressor through a pipeline connected to the other two interfaces of the four-way reversing valve.

[0006] Furthermore, the compressor and the condenser located on its left side are installed inside the lower end outlet section of the exhaust channel and located outside the right air outlet of the cross-flow plate heat exchanger, the evaporator and the supply air side reheater located on the left side of the evaporator are installed inside the fresh air channel outlet section and located outside the left air outlet of the cross-flow plate heat exchanger, and the electronic expander is installed in the lower end outlet section of the exhaust channel and located outside the compressor.

[0007] Furthermore, a humidifier is installed inside the outlet section of the fresh air channel and is located on the left side of the reheater on the supply air side. A humidity sensor is installed in the inlet section of the exhaust channel for detecting the humidity of the air entering from the indoor exhaust port. The humidifier adjusts the humidification amount according to the difference between the set value and the actual value detected by the humidity sensor.

[0008] Furthermore, the filtering and purification component includes an electrostatic mist absorption plate, an exhaust side filter and a fresh air side filter. An exhaust centrifugal fan and an electrostatic mist absorption plate and an exhaust side filter located on the air outlet side of the exhaust centrifugal fan are installed inside the inlet section of the exhaust channel. The electrostatic mist absorption plate and the exhaust side filter adsorb and collect oil mist and smoke in the air in the exhaust channel. The sewage outlet of the electrostatic mist absorption plate is located on the outer wall of the inlet section of the exhaust channel. An air supply centrifugal fan and a fresh air side filter are installed inside the inlet section of the fresh air channel, and the fresh air side filter is located on the air outlet side of the air supply centrifugal fan.

[0009] Furthermore, the inlet section of the exhaust channel is also provided with a high-voltage electrostatic generator for removing dust particles in the air.

[0010] Furthermore, a control box for adjusting and controlling the entire machine and controlling the working mode of the refrigerant flow control system is provided in the middle of the top wall of the shell.

[0011] The advantages of the present invention compared with the prior art are: 1. This technical solution recycles the energy discharged from indoor air during fresh air ventilation and cooling / heating, achieving energy recovery from three levels and achieving maximum energy saving during fresh air ventilation and cooling / heating functions; 2. This technical solution uses a filtering and purification component to purify the oil mist and dust in the air discharged from the exhaust duct, and removes dust and dries the fresh air sent into the fresh air duct, reducing the impact of the exhausted air on the surrounding environment and preventing oil pollution from being discharged into the outdoor air, thus contributing to achieving blue skies and green waters. 3. This technical solution has requirements for indoor humidity. The humidifier can adjust the humidification amount according to the difference between the actual value detected by the humidity sensor and the set value to achieve a constant temperature and humidity fresh air effect. It is suitable for dehumidification, heating, ventilation and heat recovery in the rainy season, ventilation in the transition season, heating in winter and cooling in summer, humidification in the dry season and electrostatic oil removal in oil mist environment. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] Figure 1 It is a schematic diagram of the structure of the present invention; Figure 2 This is a system principle block diagram of the refrigerant flow control system of the present invention under summer working conditions; Figure 3 This is a system principle block diagram of the refrigerant flow control system of the present invention under winter conditions. DETAILED DESCRIPTION

[0013] The following is a combination of the embodiments of the present invention Figure 1-3The technical solutions in the embodiments of the present invention are clearly and completely described. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of them. All other embodiments derived by persons of ordinary skill in the art based on the embodiments of the present invention without inventive effort are within the scope of protection of the present invention.

[0014] It should be noted that, in this document, unless otherwise stated, it should be understood that the terms "center," "upper," "lower," "front," "back," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," and the like indicate positions or relationships based on those shown in the accompanying drawings. These are intended only to facilitate the description of the present invention and simplify the description, and are not intended to indicate or imply that the devices or components referred to must have a specific orientation, be constructed, or operate in a specific orientation. Therefore, they should not be construed as limiting the present invention. Furthermore, the terms "first," "second," "third," and the like are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0015] As used herein, the terms "comprises," "comprising," or any other variations thereof are intended to encompass non-exclusive inclusion, such that a process, method, article, or apparatus that includes a list of elements includes not only those elements but also other elements not explicitly listed, or elements inherent to such process, method, article, or apparatus. In the absence of further limitations, the phrase "comprising a..." does not preclude the presence of additional identical elements in the process, method, article, or apparatus that includes the elements.

[0016] Fresh air air conditioner, such as Figure 1-3 As shown, it includes a shell 1, wherein the shell 1 is provided with an exhaust duct 5 with an indoor exhaust outlet 3 located at the upper left end of the shell 1 and an outdoor exhaust outlet 4 located at the lower right end of the shell 1, the shell 1 is provided with a fresh air duct 8 with an outdoor fresh air outlet 7 located at the upper right end of the shell 1 and an indoor supply air outlet 6 located at the lower left end of the shell 1, the intersection of the exhaust duct 5 and the fresh air duct 8 is respectively connected to the cross-flow plate heat exchanger 2 installed in the inner cavity of the shell 1, and the wind in the exhaust duct 5 and the fresh air duct 8 is heat exchanged through the cross-flow plate heat exchanger 2; the shell 1 is provided with a filtering and purification component for purifying the air entering the exhaust duct 5 and the fresh air duct 8, the shell 1 is provided with a refrigerant flow control system 9 including a compressor 9-1, a condenser 9-2, an evaporator 9-3 and a supply side reheater 9-4, and the fresh air delivered to the room through the indoor supply air outlet 6 is cooled / heated by the refrigerant flow control system 9.

[0017] The specific structure of the refrigerant flow control system 9 is as follows: the refrigerant flow control system 9 also includes a four-way reversing valve 9-5 and a three-way regulating valve 9-6. The outlet of the compressor 9-1 is connected to the inlet of the condenser 9-2 through a pipe connected to two interfaces of the four-way reversing valve 9-5. The outlet of the condenser 9-2 is connected between the one-way valve 1 9-7 and the one-way valve 2 9-8 for single-phase conduction through a pipe installed with the three-way regulating valve 9-6. The air supply side reheater 9-4 connected to the input end of the condenser 9-2 and the three-way regulating valve 9-6 is connected in parallel with the condenser 9-2, and the three-way regulating valve 9-6 controls the on-off and opening of the condenser 9-2 and the air supply side reheater 9-4. The inlet end of the one-way valve 1 9-7 and the outlet end of the one-way valve 2 9-8 are connected to the pipeline installed with the one-way valve 3 9-9 and the one-way valve 4 9-10, and the inlet end of the liquid storage tank 9-11 is connected to the outlet end of the one-way valve 4 9-10. On the pipeline between the inlet end and the outlet end of the one-way valve 2 9-8, the outlet end of the liquid reservoir 9-11 is connected between the inlet end of the one-way valve 1 9-7 and the inlet end of the one-way valve 3 9-9 through the electronic expander 9-12, one end of the evaporator 9-3 is connected between the one-way valve 3 9-9 and the one-way valve 4 9-10, and the other end of the evaporator 9-3 is connected to the inlet end of the compressor 9-1 through a pipeline connected to the other two interfaces of the four-way reversing valve 9-5; specifically, the compressor 9-1 and the condenser 9-2 located on its left side are installed inside the lower end outlet section of the exhaust channel 5 and are located outside the right air outlet of the cross-flow plate heat exchanger 2, the evaporator 9-3 and the supply air side reheater 9-4 located on the left side of the evaporator 9-3 are installed inside the outlet section of the fresh air channel 8 and are located outside the left air outlet of the cross-flow plate heat exchanger 2, and the electronic expander 9-12 is installed in the lower end outlet section of the exhaust channel 5 and is located outside the compressor 9-1.

[0018] like Figure 2 The figure shows the working principle diagram of the summer working condition. Under the summer working condition, the compressor 9-1 compresses the low-temperature and low-pressure refrigerant gas into a high-temperature and high-pressure gas, which flows to the condenser 9-2 through the four-way reversing valve 9-5. The refrigerant releases heat to the outside and condenses into liquid in the condenser 9-2. After passing through the reheater 9-4, part of the liquid flows into the liquid reservoir 9-11 through the three-way regulating valve 9-6 and the one-way valve 9-8. After being stored and separated in the liquid reservoir 9-11, it is throttled and reduced in pressure by the electronic expansion valve 9-12, and then enters the evaporator 9-3 through the one-way valve 9-9. In the evaporator 9-3, the refrigerant absorbs heat and evaporates into gas. At this time, the air at 30.44°C is sent out from the left port after heat exchange in the cross-flow plate heat exchanger 2, releases heat and is cooled after flowing to the evaporator 9-3. It is then sent to the room through the indoor air supply port 6 (humidified by the humidifier 10 when humidification is required). The temperature of the air sent to the room is reduced to 13°C. Then, the refrigerant flows back to the compressor 9-1 through the four-way reversing valve 9-5, completing a refrigeration cycle and realizing the refrigeration function under summer working conditions.

[0019] like Figure 3 The figure shows the working principle of winter working condition. Under winter working condition, compressor 9-1 compresses low-temperature and low-pressure refrigerant gas into high-temperature and high-pressure gas, which flows to evaporator 9-3 through four-way reversing valve 9-5 (the evaporator acts as a condenser at this time). As evaporator 9-3 releases heat, cross-flow plate heat exchanger 2 in fresh air channel 8 exchanges heat and the 10.89℃ air sent out from the left port flows to evaporator 9-3 to be heated, and then sent to the room through indoor air outlet 6 (humidifier is used when humidification is required). 10 humidification), to achieve the purpose of heating, then, the refrigerant passes through the one-way valve four 9-10 to the liquid storage tank 9-11, and is throttled and reduced in pressure by the electronic expansion 9-12, and then passes through the one-way valve one 9-7 and the three-way regulating valve 9-6 to enter the condenser 9-2 (the condenser at this time acts as an evaporator), so that the air at 6.67℃ sent out from the right port after heat exchange through the cross-flow plate heat exchanger 2 is cooled to -13.5℃ and discharged to the outside through the outdoor exhaust vent 4, thereby realizing the heating function under winter conditions.

[0020] When there are requirements for indoor humidity, you can choose to configure humidifiers such as wet film humidifiers and electric humidifiers. The specific setting structure is as follows: a humidifier 10 located on the left side of the supply air side reheater 9-4 is installed inside the outlet section of the fresh air channel 8, and a humidity sensor for detecting the humidity of the air entering from the indoor exhaust port 3 is installed in the inlet section of the exhaust channel 5, and the humidifier 10 adjusts the humidification amount according to the difference between the set value and the actual value detected by the humidity sensor; in the above structure, the humidification amount of the humidifier 10 is adjusted by the difference between the actual measured value and the set value of the humidity sensor installed at the inlet section of the exhaust channel 5, so as to control the indoor humidity within the required humidity range.

[0021] The specific structure of the filtering and purification component is as follows: the filtering and purification component includes an electrostatic mist absorption plate 12, an exhaust side filter 13 and a fresh air side filter 14, and an exhaust centrifugal fan 15 and an electrostatic mist absorption plate 12 and an exhaust side filter 13 located on the air outlet side of the exhaust centrifugal fan 15 are installed inside the inlet section of the exhaust channel 5, and the electrostatic mist absorption plate 12 and the exhaust side filter 13 adsorb and collect the oil mist and smoke in the air in the exhaust channel 5, and the sewage outlet of the electrostatic mist absorption plate 12 is located on the outer wall of the inlet section of the exhaust channel 5, and an air supply centrifugal fan 17 and a fresh air side filter 14 are installed inside the inlet section of the fresh air channel 8, and the fresh air side filter 14 is located on the air outlet side of the air supply centrifugal fan 17; specifically, the inlet section of the exhaust channel 5 is also provided with a high-voltage electrostatic generator 16 for removing dust particles in the air.

[0022] In the ventilation working mode, the refrigerant flow control system 9 may not be turned on, and the indoor air is purified by the electrostatic mist absorption plate 12 and the exhaust side filter 13. The electrostatic mist absorption plate 12 uses the electrostatic mist absorption plate of the plate electric field to purify the oil smoke in the air, thereby realizing the purification and recovery of non-flammable oil mist. Its electric field strength is uniform, the purification efficiency is high, the equipment runs quietly, and it is suitable for low-altitude discharge. The exhaust side filter 13 is then used to treat the dust in the deoiled and purified air, and it also has a drying effect, that is, the effect of removing impurities and drying. After that, the air entering the exhaust duct 5 and the fresh air duct 8 is heat exchanged by the cross-flow plate heat exchanger 2, so that the temperature of the air sent into the room is close to the original indoor temperature and then sent to the room. If there is a humidification demand, it can be humidified to the required humidity in the room through the humidifier 10.

[0023] A control box 11 for adjusting and controlling the entire machine and controlling the working mode of the refrigerant flow control system 9 is provided in the middle of the top wall of the shell 1 .

[0024] This solution not only has basic cooling and heating operation modes, but also has a dehumidification constant temperature operation mode, which is suitable for high humidity and low temperature conditions, such as autumn, rainy season, and civil air defense basements; when used in oil mist situations, the electrostatic mist absorption plate 12 is activated; when there is a need for humidification, the humidifier 10 is activated; Configuration Selection Example The general kitchen area is 6 square meters, the space height is 3 meters, and the volume is 18 square meters. 3 , if the ventilation frequency is 5 times, the air volume is 90CMH, select the fresh air fan and exhaust fan according to the fresh air volume of 90CMH and the exhaust air volume of 90CMH.

[0025] Taking Xi'an as an example, in summer, the calculated dry-bulb temperature for air conditioning is 35.2°C, the outdoor calculated relative humidity is 49.1% rH, the indoor dry-bulb temperature is 27°C, and the relative humidity is 47% rH; the fresh air outlet temperature is 30.44°C and 64.1% rH, and the exhaust outlet temperature is 31.78°C and 35.7% rH; in winter, the calculated outdoor dry-bulb temperature for air conditioning is -8°C and the relative humidity is 67% rH; the indoor dry-bulb temperature is 20°C and the relative humidity is 50% rH; the fresh air outlet temperature is 10.89°C and 16% rH, and the exhaust outlet temperature is 6.67°C and 83.1% rH. Summer working conditions Configure compressor cooling capacity Cooling from 30.44°C, 64.1% RH to 13°C, 98% RH, 1.16KW; exhaust air from condenser 9-2 is cooled from 31.78°C, 35.7% RH to 56.8°C, 11.41% RH, with an air volume of 120 CMH (of which 30 CMH is supplied by fresh air from the outdoor unit through the bypass damper, with the fresh air volume adjusted according to the condensing pressure); Winter conditions Fresh air temperature increased from 10.89℃ 16%rH to 50.54℃ 1.65%rH; The exhaust air temperature drops from 6.67℃ and 83.1%rH to -13.5℃ and 25.7%rH with an air volume of 120CMH (of which 30CMH is supplied by the outdoor unit's fresh air through the bypass damper, and the fresh air volume is adjusted according to the evaporation pressure); This solution has the following functions: 1) Cooling, ventilation, and heat recovery in summer; 2) Heating, ventilation, and heat recovery in winter; 3) Dehumidification, heating, ventilation, and heat recovery in the rainy season; 4) Ventilation, exhaust of indoor air, and treatment of outdoor air in the transitional season; 5) Electrostatic dehumidification in oil mist applications; 6) Humidification in the dry season.

[0026] This solution has the following three aspects of heat recovery process: The first level of heat recovery is the heat recovery of fresh air and exhaust air in the cross-flow plate heat exchanger 2; The second level of heat recovery is divided into winter and summer, and the third level is the transition season: the details are as follows: In summer, during the fresh air cooling process, heat is discharged through the condenser 9-2 on the outdoor exhaust side (the side connected to the outdoor exhaust port 4). The exhaust air passing through the cross-flow plate heat exchanger 2 cools the condenser 9-2. Since the exhaust air temperature is lower than the outdoor ambient temperature, the energy efficiency of the refrigerator is improved. Winter: The fresh air is heated and absorbs heat in the condenser 9-2. The exhaust air from the cross-flow plate heat exchanger 2 passes through the condenser 9-2. The refrigerant boils in the condenser 9-2 and absorbs heat from the exhaust air. Since the exhaust air temperature is usually higher than the outdoor ambient temperature, the energy efficiency of the heat pump working condition of the refrigerator is improved. Transitional seasons are typically characterized by high humidity and low temperatures. During these periods, the unit operates in cooling mode. After dehumidification, the air temperature at indoor air outlet 6 is relatively low. To improve indoor comfort, the dehumidified air needs to be heated. This is achieved by using the air supply reheater 9-4, located on the supply side. A temperature sensor located on the indoor exhaust side (i.e., on the indoor exhaust outlet 3 side, used to detect the temperature of the air leaving the room) measures the difference between the temperature and the target indoor temperature. This controls the opening of three-way regulating valve 9-6, thereby controlling the heating capacity of the air supply reheater 9-4. This process recovers the condensation heat that would otherwise be discharged outdoors.

[0027] This technical solution reduces the energy loss of indoor gas exhaust during fresh air ventilation and cooling / heating, and realizes that the fresh air ventilation function and the cooling / heating function do not affect each other; the air discharged from the exhaust duct 5 is purified by the filtering and purification component, and the fresh air sent into the fresh air duct 8 is dust-removed and dried, reducing the impact of the exhausted air on the surrounding environment, avoiding the discharge of oil into the outdoor air, and making a contribution to achieving blue sky and green water; if there are requirements for indoor humidity, the humidifier 10 can adjust the humidification amount according to the difference between the actual value detected by the humidity sensor and the set value to achieve a constant temperature and humidity fresh air effect, which is suitable for dehumidification, heating, ventilation and heat recovery in the rainy season, ventilation in the transition season, heating in winter and cooling in summer, humidification in the dry season and electrostatic oil removal in oil mist environment; improves the quality of fresh air, has a simple structure, novel design, low energy consumption, rich working modes, and has high use value.

[0028] It will be apparent to those skilled in the art that the present invention is not limited to the details of the exemplary embodiments described above and that the invention can be embodied in other specific forms without departing from the spirit or essential characteristics of the invention. Therefore, the embodiments should be considered in all respects as illustrative and non-restrictive, and the scope of the invention is defined by the appended claims, not the foregoing description, and all variations within the meaning and range of equivalents of the claims are intended to be included therein. Any reference sign in a claim should not be construed as limiting the claim to which it relates.

[0029] In addition, it should be understood that although this specification is described in terms of implementation methods, not every implementation method contains only one independent technical solution. This narrative method of the specification is only for the sake of clarity. Those skilled in the art should regard the specification as a whole. The technical solutions in each embodiment can also be appropriately combined to form other implementation methods that can be understood by those skilled in the art.

Claims

1. Fresh air air conditioner, characterized by: The invention comprises a shell (1) in which an upper tube shell and a lower tube shell are arranged in parallel with each other and are connected to each other through an inner cavity. The shell (1) is provided with an exhaust passage (5) in which an indoor exhaust port (3) is located at the upper left end of the shell (1) and an outdoor exhaust port (4) is located at the lower right end of the shell (1). The shell (1) is provided with a fresh air passage (8) in which an outdoor fresh air port (7) is located at the upper right end of the shell (1) and an indoor air supply port (6) is located at the lower left end of the shell (1), wherein the indoor exhaust port (3) and the indoor air supply port (6) are both located indoors, and the outdoor fresh air port (7) and the outdoor exhaust port (4) are both located outdoors. The intersection of the exhaust passage (5) and the fresh air passage (8) is provided. They are respectively connected to the cross-flow plate heat exchangers (2) installed in the inner cavity of the shell (1), and the air in the exhaust channel (5) and the fresh air channel (8) are both subjected to heat exchange through the cross-flow plate heat exchanger (2); a filter purification component for purifying the air entering the exhaust channel (5) and the fresh air channel (8) is provided inside the shell (1); a refrigerant flow control system (9) including a compressor (9-1), a condenser (9-2), an evaporator (9-3) and an air supply side reheater (9-4) is provided inside the shell (1), and the fresh air delivered to the room through the indoor air supply port (6) is cooled / heated by the refrigerant flow control system (9).

2. The fresh air air conditioner according to claim 1, characterized in that: The refrigerant flow control system (9) also includes a four-way reversing valve (9-5) and a three-way regulating valve (9-6), the outlet of the compressor (9-1) is connected to the inlet of the condenser (9-2) through a pipeline connected to two interfaces of the four-way reversing valve (9-5), the outlet of the condenser (9-2) is connected between the one-way valve 1 (9-7) and the one-way valve 2 (9-8) for single-phase conduction through a pipeline installed with a three-way regulating valve (9-6), and the air supply side reheater (9-4) connected to the input end of the condenser (9-2) and the three-way regulating valve (9-6) is connected in parallel with the condenser (9-2), and the on-off and opening of the condenser (9-2) and the air supply side reheater (9-4) are controlled by the three-way regulating valve (9-6), and the one-way valve The inlet end of one-way valve (9-7) and the outlet end of one-way valve (9-8) are connected to the pipeline installed with one-way valve (9-9) and one-way valve (9-10), and the inlet end of the liquid reservoir (9-11) is connected to the pipeline between the outlet end of one-way valve (9-10) and the outlet end of one-way valve (9-8), the outlet end of the liquid reservoir (9-11) is connected between the inlet end of one-way valve (9-7) and the inlet end of one-way valve (9-9) through the electronic expander (9-12), one end of the evaporator (9-3) is connected between the one-way valve (9-9) and the one-way valve (9-10), and the other end of the evaporator (9-3) is connected to the inlet end of the compressor (9-1) through a pipeline connected to the other two interfaces of the four-way reversing valve (9-5).

3. The fresh air air conditioner according to claim 2, characterized in that: The compressor (9-1) and the condenser (9-2) located on the left side thereof are installed inside the outlet section of the lower end of the exhaust duct (5) and are located outside the right air outlet of the cross-flow plate heat exchanger (2); the evaporator (9-3) and the air supply side reheater (9-4) located on the left side of the evaporator (9-3) are installed inside the outlet section of the fresh air duct (8) and are located outside the left air outlet of the cross-flow plate heat exchanger (2); and the electronic expander (9-12) is installed in the outlet section of the lower end of the exhaust duct (5) and is located outside the compressor (9-1).

4. The fresh air air conditioner according to claim 1, characterized in that: A humidifier (10) is installed inside the outlet section of the fresh air channel (8) and is located on the left side of the air supply side reheater (9-4). A humidity sensor for detecting the humidity of air entering from the indoor exhaust port (3) is installed at the inlet section of the exhaust channel (5). The humidifier (10) adjusts the humidification amount according to the difference between the set value and the actual value detected by the humidity sensor.

5. The fresh air air conditioner according to claim 1, characterized in that: The filtering and purification component comprises an electrostatic mist absorption plate (12), an exhaust side filter (13) and a fresh air side filter (14); an exhaust centrifugal fan (15) and an electrostatic mist absorption plate (12) and an exhaust side filter (13) located on the air outlet side of the exhaust centrifugal fan (15) are installed inside the inlet section of the exhaust channel (5); the electrostatic mist absorption plate (12) and the exhaust side filter (13) adsorb and collect oil mist and smoke in the air in the exhaust channel (5); the sewage outlet of the electrostatic mist absorption plate (12) is located on the outer wall of the inlet section of the exhaust channel (5); an air supply centrifugal fan (17) and a fresh air side filter (14) are installed inside the inlet section of the fresh air channel (8), and the fresh air side filter (14) is located on the air outlet side of the air supply centrifugal fan (17).

6. The fresh air air conditioner according to claim 5, characterized in that: The inlet section of the exhaust channel (5) is also provided with a high-voltage electrostatic generator (16) for removing dust particles in the air.

7. The fresh air air conditioner according to any one of claims 1 to 6, characterized in that: A control box (11) for regulating and controlling the entire machine and controlling the working mode of the refrigerant flow control system (9) is provided in the middle of the top wall of the shell (1).

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