Machine room environment control unit

Abstract

The utility model provides an environment control unit for a machine room, which comprises an outdoor unit which comprises a compressor, an outdoor unit heat exchanger, a throttling device and an outdoor fan; the indoor unit is connected with the outdoor unit through an online pipe, and the indoor unit comprises a shell, an air inlet pipe and an air outlet pipe; the air inlet is arranged on the shell and is used for enabling air in the first space to enter the shell; the fresh air inlet is used for enabling air in the second space to enter the shell; the air outlet is used for discharging air entering the shell; the air inlet channel is formed in the shell and communicates with the fresh air inlet and the return air inlet; the air treatment channel is used for treating air entering the shell; the exhaust channel is formed in the shell, provided with an exhaust fan and communicated with the air outlet; the indoor heat exchanger is used for carrying out heat exchange on air flowing through the air exhaust channel; and the indoor heat exchanger is arranged in the exhaust channel.

Description

Technical Field

[0001] The utility model relates to the technical field of air conditioning equipment, in particular to an environmental control unit for a machine room. Background Art

[0002] The computer room environmental control unit is a key device used to maintain the temperature, humidity and air quality in the computer room. It achieves functions such as cooling, dehumidification, ventilation and air treatment through a series of working principles.

[0003] In specific operation, the environmental control unit in the computer room has the functions of fresh air processing and return air processing. The fresh air processing function is to send the outdoor fresh air to the room after processing, so as to achieve the purpose of fresh air processing. The return air processing function is to send the indoor return air back to the room after processing, so as to achieve the purpose of return air processing.

[0004] However, the equipment in the computer room is a high-precision equipment, and has very high requirements for the surrounding environment, such as temperature and humidity, so as to ensure that the equipment in the computer room operates under constant temperature and humidity conditions. This requires the windows and other walls of the computer room to be sealed to ensure constant temperature and humidity in the computer room. At the same time, the computer room must also be supplemented with fresh air. The fresh air in nature can only enter the computer room after being processed by the fresh air system to form an internal circulation, and the fresh air is filtered to meet certain purification requirements.

[0005] Due to the special requirements for air temperature and humidity in the computer room, when the fresh air integrated machine with only fresh air function is used for outdoor air with high or low temperature and high humidity, the air introduced from the outside will not meet the requirements of the computer room. Utility Model Content

[0006] The utility model aims to solve at least one of the technical problems existing in the prior art.

[0007] To this end, one purpose of the utility model is to propose a computer room environmental control unit, which can control the start of the unit according to indoor and outdoor environmental factors, and provide the environment required for the operation of computer room equipment by heating, cooling or dehumidifying fresh air or return air.

[0008] In order to achieve the above-mentioned purpose, the embodiment of the utility model proposes a machine room environment control unit, comprising:

[0009] An outdoor unit, the outdoor unit comprising a compressor, an outdoor heat exchanger, a throttling device, and an outdoor fan;

[0010] An indoor unit, wherein the indoor unit is connected to the outdoor unit via a connection pipe, and the indoor unit comprises:

[0011] case;

[0012] a return air inlet, provided on the housing, for allowing the air in the first space to enter the housing;

[0013] A fresh air inlet is provided on the housing and is used to allow the air in the second space to enter the housing;

[0014] An air outlet, provided on the housing, for discharging the air entering the housing;

[0015] An air inlet channel is formed in the housing and is connected to the fresh air inlet and the return air inlet;

[0016] an air processing channel formed in the housing and used for processing the air entering the housing;

[0017] An exhaust passage is formed in the housing, is provided with an exhaust fan, and is connected to the air outlet;

[0018] an indoor heat exchanger, used for performing heat exchange on the air flowing through the discharge passage;

[0019] Wherein, the indoor heat exchanger is arranged in the exhaust passage.

[0020] In some embodiments of the present application, it also includes:

[0021] Controller;

[0022] An outdoor temperature sensor, wherein the outdoor temperature sensor is used to detect the outdoor temperature;

[0023] An indoor temperature sensor, wherein the indoor temperature sensor is used to detect the indoor temperature;

[0024] The controller controls the connection with the outdoor fan, the exhaust fan, the outdoor temperature sensor and the indoor temperature sensor.

[0025] In some embodiments of the present application, the fresh air inlet, the return air inlet and the air outlet are arranged on different sides of the shell, wherein the indoor temperature sensor is arranged in the first space close to the operating equipment.

[0026] In some embodiments of the present application, the air processing channel is provided with an air processing module, and the air processing module includes a coarse-efficiency filter, a high-efficiency electronic filter and a medium-efficiency filter arranged in sequence along the air flow direction, and the indoor heat exchanger is arranged close to the medium-efficiency filter.

[0027] In some embodiments of the present application, the air handling channel is provided with a maintenance port on the side projection area of ​​the shell, and a maintenance cover is provided at the maintenance port, and the maintenance cover is arranged to extend in a direction close to the indoor heat exchanger.

[0028] In some embodiments of the present application, the indoor heat exchanger is arranged on the upstream side of the exhaust fan.

[0029] The present application provides a computer room environmental control unit, which integrates air purification, fresh air or return air temperature and humidity adjustment functions. When the air introduced from the outside cannot meet the air requirements in the computer room, the introduced fresh air is heated, cooled or dehumidified by controlling the operation of the air conditioner.

[0030] Additional aspects and advantages of the present invention will be given in part in the following description, and in part will become apparent from the following description, or will be learned through the practice of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0031] The above and / or additional aspects and advantages of the present invention will become apparent and easily understood from the description of the embodiments in conjunction with the following drawings, in which:

[0032] Figure 1 The present invention is a three-dimensional view of the whole structure of the machine room environment control unit according to one embodiment of the present invention. Figure 1 ;

[0033] Figure 2 The present invention is a three-dimensional view of the whole structure of the machine room environment control unit according to one embodiment of the present invention. Figure 2 ;

[0034] Figure 3 The present invention is a three-dimensional view of the whole structure of the machine room environment control unit according to one embodiment of the present invention. Figure 3 ;

[0035] Figure 4 The present invention is a three-dimensional view of the whole structure of the machine room environment control unit according to one embodiment of the present invention. Figure 4 ;

[0036] Figure 5 The present invention is a three-dimensional view of the whole structure of the machine room environment control unit according to one embodiment of the present invention. Figure 5 ;

[0037] Figure 6 This is a schematic diagram of the internal structure of the whole machine structure in the machine room environmental control unit according to one embodiment of the utility model;

[0038] Figure 7 It is an enlarged view of structure A in a machine room environmental control unit according to an embodiment of the utility model.

[0039] Reference numerals:

[0040] Computer room environmental control unit 100;

[0041] Outdoor unit 101; indoor unit 102; pipe 103;

[0042] Return air inlet 111; first air valve module 1111;

[0043] Fresh air inlet 112; second air valve module 1121;

[0044] Air outlet 113; third air valve module 1131;

[0045] Maintenance opening 114; maintenance cover 1141;

[0046] Air inlet channel 110; air processing channel 120; exhaust channel 130;

[0047] Coarse filter 121; high efficiency electronic filter 122; medium efficiency filter 123; exhaust fan 131;

[0048] Indoor heat exchanger 140;

[0049] The first guide rail member 1221 . DETAILED DESCRIPTION

[0050] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0051] In the description of the present invention, it should be understood that the terms "center", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", etc., indicating directions or positional relationships, are based on the directions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific direction, be constructed and operated in a specific direction, and therefore should not be understood as a limitation on the present invention.

[0052] The terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, a feature defined as "first" or "second" may explicitly or implicitly include one or more of the features. In the description of the present utility model, unless otherwise specified, "plurality" means two or more.

[0053] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installation", "connection" and "connection" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0054] The computer room environment control unit of the present utility model refers to a device that can adjust air temperature, humidity, cleanliness, etc. The implementation of the present utility model is described by taking the computer room environment control unit that can process indoor and outdoor air as an example. "The installation state of the computer room environment control unit" refers to the state in which the computer room environment control unit is installed indoors and can operate normally.

[0055] The present invention is described in detail below with reference to the accompanying drawings.

[0056] [Working principle of the environmental control unit in the computer room]

[0057] The computer room environment control unit 100 is a key device for maintaining the temperature, humidity and air quality in the computer room. It realizes functions such as cooling, dehumidification, ventilation and air treatment through a series of working principles.

[0058] In specific operation, the computer room environment control unit 100 has a fresh air processing function and a return air processing function. The fresh air processing function is to send the outdoor fresh air to the room after processing, so as to achieve the purpose of processing the fresh air. The return air processing function is to send the indoor return air back to the room after processing, so as to achieve the purpose of processing the return air.

[0059]

Composition of installation space

[0060] like Figure 1 As shown, the computer room environment control unit 100 of the present application includes an outdoor unit 101 and an indoor unit 102, wherein the indoor unit 102 can be installed on the roof or the side of the wall in the computer room. The following is an exemplary installation method of installing on the side of the computer room wall.

[0061] The computer room environmental control unit 100 of the embodiment of the present application includes an outdoor unit 101 and an indoor unit 102. The indoor unit 102 connects two independent spaces to transmit the air in one space to the other space. The two independent spaces may be two independent indoor spaces, or may be an indoor space and an outdoor space, or even different areas of a certain space. The indoor unit 102 of the embodiment of the present application may be installed in the first space. The first space and the second space are two separate independent spaces, for example, separated by a wall, wherein the first space is referred to as the indoor space and is referred to as the indoor space for short, and the second space is referred to as the outdoor space and is referred to as the outdoor space. The indoor unit 102 may inhale air from any of the two spaces, and then supply air to any of the two spaces or to both spaces at the same time.

[0062] In the embodiment of the present application, the indoor unit 102 is installed in a first space, that is, indoors, and is connected to a second space, that is, outdoors, for introducing fresh air into the indoor space.

[0063]

Complete machine composition

[0064] like Figure 1 , Figure 2 and Figure 3 As shown, the computer room environmental control unit 100 includes: an outdoor unit 101, the outdoor unit 101 includes a compressor, an outdoor unit heat exchanger, and a throttling device; an indoor unit 102, and the indoor unit 102 is connected to the outdoor unit 101 through a connecting pipe (refrigerant pipe).

[0065] like Figure 3 As shown, specifically, the indoor unit 102 includes: a shell forming an appearance, a fresh air inlet 112, a return air inlet 111 and an air outlet 113 formed on the shell. Among them, the return air inlet 111 is provided on the shell, and is used to allow the air of the first space to enter the shell; the fresh air inlet 112 is provided on the shell, and is used to allow the air of the second space to enter the shell; the air outlet 113 is provided on the shell, and is used to discharge the air entering the shell.

[0066] The fresh air inlet 112, the return air inlet 111 and the air outlet 113 are arranged on different sides of the housing. The air inlet of the fresh air inlet 112 and the return air inlet 111 are arranged substantially vertically, and the air outlet of the air outlet 113 is arranged substantially vertically to the air inlet of the fresh air inlet 112 and the return air inlet 111.

[0067] like Figure 2 As shown, the inside of the shell and the outside of the shell are connected through a pipe 103. The pipe 103 is installed on the shell, so that the inside of the shell and the outside of the shell are connected through the pipe 103.

[0068] Specifically, the space in the shell can be divided into an air inlet channel 110, an air processing channel 120 and an exhaust channel 130. Among them, the air inlet channel 110 is formed in the shell and is connected to the fresh air inlet 112 and the return air inlet 111; the air processing channel 120 is formed in the shell and is provided with an air processing module for processing the air entering the shell, including filtering debris, charged particles, PM2.5, etc.; the exhaust channel 130 is formed in the shell and is provided with an exhaust fan 131, and is connected to the air outlet 113, wherein the exhaust fan 131 is used to drive the air to be discharged through the air outlet 113, and the exhaust fan 131 is a DC or AC fan.

[0069] It also includes an indoor heat exchanger, which is connected to the outdoor unit 101 through a refrigerant pipe and is used to perform heat exchange on the air flowing through the exhaust passage, and to heat, cool or dehumidify the air.

[0070] During specific operation, when the outdoor air temperature is lower than the required air temperature in the computer room, the indoor heat exchanger works to heat the air from the outside, heat it to the required temperature of the computer room and discharge it into the computer room; when the outdoor air temperature is higher than the required air temperature in the computer room, the indoor heat exchanger works to cool the air from the outside, cool it to the required temperature of the computer room and discharge it into the computer room; when the indoor air humidity is higher than the required air humidity in the computer room, the indoor heat exchanger works to dehumidify the air from the outside, dehumidify it to the required humidity of the computer room and discharge it into the computer room.

[0071]

Housing structure

[0072] like Figure 3 , Figure 4 and Figure 5 As shown, the housing forms a machine room environment control unit 100 including an outdoor unit 101 and an indoor unit 102, wherein the outer contours of the outdoor unit 101 and the indoor unit 102 are both in the shape of a rectangular box with a hollow interior.

[0073] Specifically, the indoor unit 102 includes a shell, wherein the shell includes: a front panel, a rear panel, a left panel, a right panel, an upper panel and a lower panel, the front panel and the rear panel are arranged opposite to each other, the left panel and the right panel are arranged opposite to each other, and the upper panel and the lower panel are arranged opposite to each other.

[0074] In the embodiment of the present application, the outdoor unit 101 is installed in the second space, and the indoor unit 102 is installed on the side of the wall of the first inner space, that is, installed on the side of the indoor wall, the front panel faces the space where the indoor users are located, that is, the side facing the reader; the rear panel faces the side facing away from the space where the indoor users are located, that is, the side facing the indoor wall, and the side facing away from the reader. After the indoor unit 102 is installed on the indoor wall, the side of the indoor unit 102 facing the indoor top is the upper panel, and the side facing the indoor ground is the lower panel. The side located on the left hand side of the reader is the left panel, and the side located on the right hand side of the reader is the right panel.

[0075] like Figure 3 As shown, a return air inlet 111 is provided on the left panel of the shell. Preferably, two return air inlets 111 are provided, and the two return air inlets 111 are openings on the left panel. To achieve control of the return air inlet 111, the return air inlet 111 is opened and closed as needed, and a first air valve module 1111 is provided at the return air inlet 111. The first air valve module 1111 includes a driving motor and shutters, and the driving motor is connected to the shutter drive, so that the opening or closing of the return air inlet 111 is controlled according to the control information.

[0076] like Figure 3 As shown, an air outlet 113 is provided on the front panel of the shell. Preferably, three air outlets 113 are provided, and the three air outlets 113 are openings on the front panel; the opening and closing of the air outlet 113 are automatically adjusted according to the amount of wind, and a third air valve module 1131 is provided at the air outlet 113. The air valve module includes a rotating shaft and an air door, and the air door is movably connected to the rotating shaft, so that the air door can automatically adjust the size of the opening according to the amount of wind. When there is no wind, the air door will be automatically closed; when the wind volume is large, the air door will be opened accordingly.

[0077] like Figure 3 As shown, a fresh air inlet 112 is arranged on the upper panel of the shell, and the number of the fresh air inlet 112 is 1. To realize the control of the fresh air inlet 112, it is opened or closed according to the control information. A second air valve module 1121 is arranged at the fresh air inlet 112, and the third air valve template includes a driving motor and louvers, and the driving motor is connected to the louver driving.

[0078] like Figure 4 As shown, in order to facilitate the disassembly and repair of the entire machine after installation and to facilitate the disassembly and repair of the components inside the shell without destroying the original installation structure, a maintenance port 114 is formed on the front panel of the shell, and a maintenance cover 1141 is provided at the maintenance port 114, which can cover or open the maintenance port.

[0079]

Inner structure of the whole machine

[0080] like Figure 3 , Figure 4 , Figure 5 , Figure 6 and Figure 7 As shown, the internal space of the housing includes an air inlet channel 110, an air processing channel 120 and an exhaust channel 130 according to the function. In specific operation, when the return air function is started, the first air valve module 1111 is opened, and the shutter is driven by the driving motor to rotate to achieve the opening. The return air enters the air inlet channel 110 through the return air inlet 111, and the return air passes through the air processing channel 120 and the exhaust air duct in sequence, and finally is discharged through the air outlet 113. At this time, the third air valve module 1131 is automatically opened according to the size of the air volume.

[0081] When the fresh air function is enabled, the second air valve module 1121 is opened, and the shutter is driven by the driving motor to rotate to open. Fresh air enters the air inlet channel 110 through the fresh air inlet 112, passes through the air processing channel 120 and the exhaust channel 130 in sequence, and is finally discharged through the air outlet 113. At this time, the third air valve module 1131 is automatically opened according to the size of the air volume.

[0082] The air handling module includes a high-efficiency electronic filter 122, which is used to absorb charged particles, filter charged particles in the air, prevent charged particles from entering the equipment in the computer room, and reduce the damage rate of charged components.

[0083] To install the high efficiency electronic filter 122 , the air treatment module includes a first guide rail 1221 , and the high efficiency electronic filter 122 is disposed on the first guide rail 1221 , wherein the first guide rail 1221 is an insulating material, such as plastic, rubber, etc.

[0084] In order to achieve coarse filtration of return air or fresh air and prevent impurities such as hair from entering the shell, the air treatment module includes a coarse filter 121, and the coarse filter 121 is arranged on the upstream side of the high-efficiency electronic filter 122, that is, the coarse filter 121 is provided on the downstream side of the return air inlet 111 or the fresh air inlet 112, and the coarse filter 121 is arranged between the air inlet channel 110 and the high-efficiency electronic filter 122.

[0085] In order to achieve efficient filtration of fresh air and filter out air pollutants such as PM2.5, the air treatment module includes a medium efficiency filter 123, which is arranged on the downstream side of the high efficiency electronic filter 122, that is, the medium efficiency filter 123 is arranged on the upstream side of the air outlet 113, and the medium efficiency filter 123 is arranged between the high efficiency electronic filter 122 and the exhaust duct 130.

[0086] In the embodiment of the present application, in order to further improve the quality of outdoor fresh air or return air entering the room, a coarse filter 121 is provided in the air processing channel 120 at the downstream side of the fresh air inlet 112 or the return air inlet 111, that is, the coarse filter 121 is located at the upstream side of the high-efficiency electronic filter 122, and the coarse filter 121 can be in the shape of a rectangular parallelepiped, which can further purify the air inhaled from the fresh air inlet 112 or the return air inlet 111, and prevent dust or fine particles from entering the room. Specifically, the coarse filter 121 can be one or more of a primary filter, an activated carbon filter, and the like.

[0087] It can be understood that the above-mentioned coarse-effect filter and high-efficiency filter can also be other filtering forms besides the above-mentioned examples, and this is not limited in the embodiments disclosed in the present application.

[0088]

Composition of exhaust fan

[0089] like Figure 5 As shown, the exhaust fan 131 is arranged in the exhaust passage 130 and at the upstream side of the air outlet 113, and is used to drive the air entering the housing from the fresh air inlet 112 or the return air inlet 111 to be blown out through the air outlet 113. The exhaust fan 131 includes a volute and a centrifugal fan, and the centrifugal fan drives the air to enter the volute and blow it out from the air outlet 113 of the volute.

[0090] The present application provides a computer room environmental control unit 100, which integrates the fresh air function and the exhaust function by respectively arranging a return air inlet 111, a fresh air inlet 112 and an air outlet 113 on different sides of the shell, and arranging an air inlet channel 110, an air treatment channel 120 and an exhaust channel 130 inside the shell, thereby realizing the sharing of internal and external circulation, and has the advantages of low energy consumption and large air volume.

[0091]

Environmental control unit in the computer room

[0092] like Figure 3 , Figure 4 and Figure 5 As shown, the present application provides a computer room environment control unit 100, further comprising:

[0093] A controller; an outdoor temperature sensor, the outdoor temperature sensor is used to detect the outdoor temperature; an indoor temperature sensor is provided on the housing and is used to detect the indoor temperature; the controller controls the connection with the exhaust fan 131, the outdoor temperature sensor and the indoor temperature sensor. The controller is used to receive the detection values ​​of the outdoor temperature sensor and the outdoor temperature sensor, generate a control signal, and adjust the air conditioner by controlling the start-up of the outdoor unit and the start-up of the indoor unit.

[0094] Specifically, the fresh air inlet 112, the return air inlet 111 and the air outlet 113 are arranged on different sides of the housing, wherein the indoor temperature sensor is arranged on the same side as the air outlet 113. Thus, the indoor temperature sensor can detect the air temperature at a position close to the air outlet 113.

[0095] Specifically, the air processing channel 120 is provided with an air processing module, and the air processing module includes a coarse filter 121, a high-efficiency electronic filter 122 and a medium-efficiency filter 123 arranged in sequence along the air flow direction, and the indoor heat exchanger 140 is arranged close to the medium-efficiency filter 123. Thus, the indoor heat exchanger processes the air processed by the air processing module and further regulates the air.

[0096] Specifically, the air processing channel 120 is provided with a maintenance port 114 on the side projection area of ​​the shell, and a maintenance cover 1141 is provided at the maintenance port 114, and the maintenance cover 1141 is arranged to be arranged in a direction close to the indoor heat exchanger 140. This facilitates the maintenance of the components in the air processing channel 120 and facilitates disassembly and maintenance.

[0097] Specifically, the indoor heat exchanger 140 is disposed on the upstream side of the exhaust fan 131 , that is, the indoor heat exchanger 140 is disposed between the air processing module and the exhaust fan 131 .

[0098] The present application provides a computer room environmental control unit, which integrates air purification, fresh air or return air temperature and humidity adjustment functions. When the air introduced from the outside cannot meet the air requirements in the computer room, the introduced fresh air is heated, cooled or dehumidified by controlling the operation of the air conditioner.

[0099] Although the present invention is described with reference to the drawings as illustrated above, the present invention is not limited to the embodiments and drawings disclosed in this specification, but can be modified in various ways by ordinary technicians within the scope of the technical concept of the present invention. Moreover, even if the effects corresponding to the structural elements of the present invention are not explicitly described in the process of describing the embodiments of the present invention, the effects that can be predicted by the corresponding structural elements should also be recognized.

Claims

1. A machine room environmental control unit, characterized in that: include: An outdoor unit, the outdoor unit comprising a compressor, an outdoor heat exchanger, a throttling device, and an outdoor fan; An indoor unit, wherein the indoor unit is connected to the outdoor unit via a connection pipe, and the indoor unit comprises: case; a return air inlet, provided on the housing, for allowing the air in the first space to enter the housing; A fresh air inlet is provided on the housing and is used to allow the air in the second space to enter the housing; An air outlet, provided on the housing, for discharging the air entering the housing; An air inlet channel is formed in the housing and is connected to the fresh air inlet and the return air inlet; an air processing channel formed in the housing and used for processing the air entering the housing; An exhaust passage is formed in the housing, is provided with an exhaust fan, and is connected to the air outlet; An indoor heat exchanger, used for performing heat exchange on the air flowing through the exhaust passage; Wherein, the indoor heat exchanger is arranged in the exhaust passage.

2. The machine room environment control unit according to claim 1, characterized in that: Also includes: Controller; An outdoor temperature sensor, wherein the outdoor temperature sensor is used to detect the outdoor temperature; An indoor temperature sensor, wherein the indoor temperature sensor is used to detect the indoor temperature; The controller controls the connection with the outdoor fan, the exhaust fan, the outdoor temperature sensor and the indoor temperature sensor.

3. The machine room environment control unit according to claim 2, characterized in that: The fresh air inlet, the return air inlet and the air outlet are arranged on different sides of the shell, wherein the indoor temperature sensor is arranged in the first space close to the operating equipment.

4. The machine room environment control unit according to claim 1, characterized in that: The air processing channel is provided with an air processing module, and the air processing module includes a coarse-effect filter, a high-efficiency electronic filter and a medium-efficiency filter arranged in sequence along the air flow direction. The indoor heat exchanger is arranged close to the medium-efficiency filter.

5. The machine room environment control unit according to claim 4, characterized in that: The air handling passage is provided with a maintenance port on the side projection area of ​​the shell, and a maintenance cover is provided at the maintenance port. The maintenance cover is arranged to extend in a direction close to the indoor heat exchanger.

6. The machine room environment control unit according to claim 1, characterized in that: The indoor heat exchanger is arranged on the upstream side of the exhaust fan.

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