Indoor unit parallel operation unit, air conditioning system and ventilation duct

Abstract

The utility model discloses an indoor unit parallel operation unit which comprises a plurality of indoor units which are sequentially arranged in the first direction, each indoor unit comprises a cabinet and a heat exchanger, the heat exchangers are arranged in the cabinets, air outlets are formed in the front sides of the cabinets in the second wind direction, and air inlets are formed in the rear sides of the cabinets in the second wind direction. Air entering from the air inlet in the rear side can flow out from the air outlet in the front side after exchanging heat with the heat exchanger; the first direction and the second direction are arranged in a crossed manner; the sealing pieces are arranged between the adjacent indoor units so as to separate and seal gaps between the adjacent indoor units in the second direction; and the adjacent indoor units are connected with the cabinets through the connecting pieces, so that the positions of the cabinets are fixed. The indoor unit parallel operation unit can effectively solve the problem that the air volume of an existing indoor unit is inconvenient to expand. The utility model further discloses an air conditioning system and a ventilation duct.

Description

TECHNICAL FIELD

[0001] The utility model relates to the field of temperature control equipment, more particularly to an indoor unit parallel machine unit, and further relates to an air conditioning system comprising the indoor unit parallel machine unit, and further relates to a ventilation hole comprising the indoor unit parallel machine unit. BACKGROUND

[0002] With the increasing demand for air conditioner performance, the use environment of the air conditioner has increasingly high requirements for air conditioner temperature control, and old large-cooling-capacity new equipment requires more development and cost investment, and the later maintenance is complex and difficult.

[0003] In the process of realizing the utility model creation, the utility model person found that the prior art at least has the following problems: the front indoor unit air volume expansion is inconvenient. UTILITY MODEL CONTENT

[0004] Therefore, a first object of the utility model is to provide an indoor unit parallel machine unit which can effectively solve the problem of inconvenient indoor unit air volume expansion, a second object of the utility model is to provide an air conditioning system comprising the indoor unit parallel machine unit, and a third object of the utility model is to provide a ventilation hole comprising the indoor unit parallel machine unit.

[0005] In order to achieve the first object, the utility model provides the following technical scheme:

[0006] An indoor unit parallel machine unit comprises:

[0007] A plurality of indoor units are arranged in sequence along a first direction, the indoor unit comprises a cabinet and a heat exchanger, the heat exchanger is arranged in the cabinet, the cabinet is provided with an air outlet at the front side in a second direction and an air inlet at the back side, and the air entering the air inlet at the back side can flow out of the air outlet at the front side after heat exchange with the heat exchanger; the first direction and the second direction are arranged in cross.

[0008] A sealing element is arranged between adjacent indoor units to separate and seal the gap between the indoor units in the second direction.

[0009] A connecting element is arranged to connect the cabinets of adjacent indoor units to each other to fix the positions of the cabinets.

[0010] When the indoor unit and the unit group are applied, the unit group device is adopted, and in the case that the cold quantity demand is large, a plurality of indoor units can be provided correspondingly, the indoor units are simply sealed and fixedly connected through the sealing element and the connecting element, so that after the unit group, the problem of reverse flow of air body does not occur, so as to avoid the problem of energy consumption reduction after the unit group, and at the same time, due to the sealing element connection and the fixing through the connecting element, the position stability between the unit groups after the unit group is good, and the problem of inconvenient installation after the unit group can be effectively avoided. In summary, the indoor unit and the unit group can effectively solve the problem of inconvenient expansion of air volume of the indoor unit.

[0011] In some embodiments, the cabinet includes a rack and a plurality of cabinet plates arranged on corresponding sides of the rack; in the second direction, the cabinet: the cabinet plate located at the most front side is a first ventilation cabinet plate, and the cabinet plate located at the most rear side is a second ventilation cabinet plate; the first ventilation cabinet plate is formed with a honeycomb hole as the air outlet, and the second ventilation cabinet plate is formed with a honeycomb hole as the air inlet; the connecting element is respectively connected to the rack of the corresponding indoor unit at both ends.

[0012] In some embodiments, the first ventilation cabinet plate is a cabinet door hingedly connected to the rack of the corresponding cabinet, and the rotation axis of the first ventilation cabinet plate, the first direction, and the second direction are all arranged perpendicular to each other.

[0013] In some embodiments, the connecting element is connected to the corresponding rack through a screw rod.

[0014] In some embodiments, the rack includes at least four vertical columns extending in a third direction and at least two connecting beams extending in the second direction, the two connecting beams are respectively located on both sides of the rack in the first direction, the two ends of the connecting beam are fixedly connected to the corresponding vertical column, and the connecting beam is sequentially provided with a plurality of connecting holes extending in the third direction and outward in the extension direction, at least one connecting element is connected to the corresponding rack through the connecting hole; the third direction, the first direction, and the second direction are all arranged perpendicular to each other.

[0015] In some embodiments, the sealing element includes two first sealing strips extending in a third direction and two second sealing strips extending in the second direction, and the two first sealing strips and the two second sealing strips form a rectangle in combination; the third direction, the first direction, and the second direction are all arranged perpendicular to each other.

[0016] In some technical solutions, two first sealing strips are respectively arranged in alignment with two columns on one side of the rack, and two second sealing strips are respectively arranged in alignment with two cross beams extending in the second direction on the one side of the rack.

[0017] In some technical solutions, the indoor unit further comprises a fan arranged between the heat exchanger and the air outlet; and an interface of the heat exchanger is arranged on the air inlet side of the cabinet.

[0018] To achieve the second purpose, the utility model also provides an air conditioning system, the air conditioning system includes any one of the indoor unit and machine set, including outdoor unit, each indoor unit of the indoor unit and machine set is parallelly arranged between each other and is in series with the outdoor unit. Since the indoor unit and machine set has the above technical effects, the air conditioning system with the indoor unit and machine set should also have corresponding technical effects.

[0019] To achieve the second purpose, the utility model also provides a ventilation hole, the ventilation hole includes any one of the indoor unit and machine set, including ventilation opening, the indoor unit and machine set is embedded at the ventilation opening. Since the indoor unit and machine set has the above technical effects, the ventilation hole with the indoor unit and machine set should also have corresponding technical effects. BRIEF DESCRIPTION OF DRAWINGS

[0020] In order to more clearly illustrate the technical solutions of the embodiments of the utility model or the prior art, the following will briefly introduce the drawings needed to be used in the embodiment or prior art description, and obviously, the drawings in the following description are only some embodiments of the utility model, and for those skilled in the art, other drawings can also be obtained according to these drawings without creative labor.

[0021] Figure 1 The structural schematic diagram of the indoor unit and machine set provided by the embodiments of the utility model is shown in the figure.

[0022] Figure 2 The structural schematic diagram of the indoor unit and machine set provided by the embodiments of the utility model is shown in the figure. Figure 1 The enlarged structural schematic diagram of A is shown in the figure.

[0023] Figure 3 The top partial structural schematic diagram of the indoor unit and machine set provided by the embodiments of the utility model is shown in the figure.

[0024] Figure 4 The structural schematic diagram of the indoor unit after the side cabinet plate is removed is shown in the figure.

[0025] The marks in the drawings are as follows:

[0026] Indoor unit 1, sealing member 2, connecting member 3, screw rod 4.

[0027] Cabinet 11, heat exchanger 12, air outlet 13, air inlet 14, fan 15, first ventilation cabinet plate 11-1, stand column 11-2, connecting cross beam 11-3, connecting hole 11-4;

[0028] First sealing strip 21, second sealing strip 22;

[0029] First direction X, second direction Y, third direction Z. DETAILED DESCRIPTION

[0030] The utility model discloses an indoor unit parallel machine unit to effectively solve the current indoor unit air volume expansion inconvenient problem.

[0031] The technical scheme in the embodiments of the utility model will be described clearly and completely below with reference to the drawings in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model and not all the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by the ordinary skill in the art without creative labor belong to the protection scope of the utility model.

[0032] Please refer to Figures 1-4 , Figure 1 The structure schematic view of the indoor unit parallel machine unit provided by the embodiments of the utility model; Figure 2 The Figure 1 The enlarged structure schematic view of A place; Figure 3 The top partial structure schematic view of the indoor unit parallel machine unit provided by the embodiments of the utility model; Figure 4 The structure schematic view of the indoor unit after the side cabinet plate is removed.

[0033] In some embodiments, an indoor unit parallel machine unit is provided, specifically, the indoor unit parallel machine unit mainly comprises an indoor unit 1, a sealing element 2 and a connecting element 3, and multiple indoor units 1 are arranged to realize parallel connection between the multiple indoor units 1. It should be noted that the parallel connection of the indoor unit 1 in the application mainly refers to structural parallel connection, that is, the problem of arranging multiple indoor units 1 side by side. The pipeline connection mode of the multiple indoor units 1 can be set according to needs, which can correspond to different outdoor units respectively, or part or all of the indoor units 1 are connected in parallel to correspond to the same outdoor unit.

[0034] The multiple indoor units 1 are arranged in sequence along the first direction X to form a larger unit, and at this time, the ventilation volume is the sum of the ventilation volumes of the indoor units 1 to realize parallel connection.

[0035] The indoor unit 1 mainly comprises a cabinet 11 and a heat exchanger 12, wherein the heat exchanger 12 is arranged in the cabinet 11 to restrict the flow direction of the air body through the cabinet 11, so as to ensure that the air body passes through the heat exchanger 12 to achieve heat exchange. The heat exchanger 12 can be connected to a mechanical refrigeration system to serve as an evaporator of the mechanical refrigeration system, which generally comprises an evaporator, a compressor, a condenser and a throttling device arranged in circulation. The heat exchanger 12 can also be connected to an external cooling tower, which is generally a wet cooling tower. Of course, one indoor unit 1 can also be provided with multiple heat exchangers 12, at least one of which is an evaporator of a mechanical refrigeration system, and at least one of which is a heat exchanger 12 connected to an external cooling tower. The heat exchanger 12 can also be connected to a cooling tower or an evaporator through other heat exchange equipment.

[0036] The heat exchanger 12 here refers to a device for exchanging heat with the air entering the air inlet 14, so that the temperature of the air body changes to meet the preset temperature requirement, and then the air body after heat exchange flows out through the air outlet 13. When the indoor unit is used for cooling, the temperature of the air outlet 13 is lower than that of the air inlet 14.

[0037] The cabinet 11 is provided with an air outlet 13 on one side in the second direction and an air inlet 14 on the other side to restrict the flow direction of the air body. In order to better understand the positional relationship between the structures in the context, the front and rear directions are introduced, and the two positive and negative directions of the second direction Y are respectively the positive direction and the negative direction. Specifically, the air outlet direction is forward, and the air outlet 13 is arranged on the front side of the cabinet 11 in the second direction, and the air inlet 14 is arranged on the rear side. At the same time, it is ensured that the air entering the air inlet 14 on the rear side can be exchanged with the heat exchanger 12 and then flow out from the air outlet 13 on the front side. The first direction X and the second direction Y are arranged in cross, which is different from parallel arrangement, so that the air inlet direction and the parallel direction are arranged staggered to avoid interference between the parallel indoor units 1. Specifically, the first direction X and the second direction Y can be arranged vertically.

[0038] The sealing element 2 is arranged between the adjacent indoor units 1 to seal the gap between them in the second direction Y to prevent the air body of the air outlet 13 from flowing back through the gap between the indoor units 1. The use of the sealing element 2 greatly reduces the difficulty of parallel connection. The sealing element 2 is generally a soft structure, which can not only block the air body, but also reduce the transmission of vibration to ensure the stability of the overall structure after parallel connection. At the same time, arranging it in the air duct will not cause air backflow. Specifically, the sealing element 2 should be arranged in close contact with the cabinets 11 of the two indoor units 1 on both sides to ensure sealing contact.

[0039] And the adjacent indoor units 1 are connected to each other by the connecting pieces 3 to realize the position fixation, which not only ensures the stability of the position, but also ensures the compression amount of the sealing piece 2. Compared with the glue sealing, the extrusion sealing can better improve the sealing effect, and the sealing piece 2 also has the buffering effect, reduces the vibration transmission, and reduces the noise. That is, under the action of the connecting piece 3, the sealing piece 2 is compressed in the first direction X, and the two sides in the first direction X are respectively abutted with the two indoor units 1 to realize the sealing.

[0040] In some embodiments, when the above indoor unit and the parallel machine unit are applied, the parallel machine device is adopted, and in the case of large cold quantity demand, a plurality of indoor units 1 can be provided, and the indoor units 1 are simply sealed and fixedly connected by the sealing piece 2 and the connecting piece 3, so that after parallel connection, the problem of reverse flow of air body does not occur, so as to avoid the problem of energy consumption reduction after parallel connection, and at the same time, due to the connection of the sealing piece 2 and the fixation by the connecting piece 3, the position stability after parallel connection is good, which can effectively avoid the problem of inconvenient installation after parallel connection. In summary, the indoor unit parallel machine unit can effectively solve the problem of inconvenient expansion of air volume of the indoor unit 1.

[0041] In some embodiments, due to the parallel connection, the indoor unit 1 is not greatly changed, so that the existing indoor unit device can be directly used for parallel layout or the relatively small cold quantity indoor unit can be quickly developed for multi-indoor unit parallel layout to meet the demand, and the external machine circulation can be shared through the parallel scheme to reduce the number of external machines and save the cost; in the actual use process of the multi-indoor unit parallel layout, the number of indoor units can be controlled according to the logic to achieve the cold quantity adjustment under different demands; in the later maintenance, the data of a single indoor unit can be simply maintained to meet the data maintenance of the whole equipment.

[0042] In some embodiments, for the indoor unit 1, the cabinet 11 of the indoor unit 1 generally includes a rack and a plurality of cabinet plates arranged on the corresponding side surfaces of the rack, wherein the rack is a main load-bearing component, and the cabinet plates are mainly used to constrain the flow direction of the air body and protect the equipment inside the cabinet 11.

[0043] In the second direction Y, in the cabinet 11: the cabinet plate at the front side is the first ventilation cabinet plate 11-1, which can also be called the front ventilation cabinet plate; and the cabinet plate at the rear side is the second ventilation cabinet plate, which can also be called the rear ventilation cabinet plate. The first ventilation cabinet plate 11-1 is formed with honeycomb holes as the air outlet 13, and the second ventilation cabinet plate is formed with honeycomb holes as the air inlet 14. Generally, for the indoor unit 1, the first ventilation cabinet plate 11-1 and the second ventilation cabinet plate can be partially provided with honeycomb holes, or can be entirely provided with honeycomb holes. As a parallel connection scheme, the first ventilation cabinet plate 11-1 and the second ventilation cabinet plate are preferably entirely covered with honeycomb holes, and of course the necessary connections and edge portions can not be provided with honeycomb holes, and the entire coverage of the honeycomb holes is to maximize the ventilation area.

[0044] In some embodiments, the connecting piece 3 can be used to connect the rack of the corresponding indoor unit 1 at both ends. And the sealing piece 2 can be attached to the rack, or can be attached to the cabinet plate on the corresponding side in the first direction X.

[0045] In some embodiments, the first ventilation cabinet plate 11-1 can be a cabinet door hingedly connected to the rack of the corresponding cabinet 11 to facilitate opening and maintenance from the front side, thereby avoiding interference caused by parallel connection. And the rotation axis of the first ventilation cabinet plate 11-1, the first direction X, and the second direction Y are all perpendicular to each other. So that the first ventilation cabinet plate 11-1 will not be interfered by other structures.

[0046] In some embodiments, the connecting piece 3 and the corresponding rack can be connected by a screw rod 4. Of course, in addition to connecting by the screw rod 4, a clamping connection can also be used. However, the clamping connection is not stable and has low strength. The screw rod 4 is preferably perpendicular to the first direction X to achieve better fixing function in the first direction X. Of course, in order to facilitate installation, a locking bolt extending along the first direction X can also be provided to connect adjacent indoor units 1 to constrain the positional relationship between the two indoor units 1, and then fixedly connected through the above-mentioned screw rod 4. The screw rod 4 can be a bolt or a screw, which can be set as needed.

[0047] In some embodiments, the rack can include at least four columns 11-2 extending along the third direction Z and at least two connecting cross beams 11-3 along the second direction Y, wherein the two connecting cross beams 11-3 are respectively located on both sides of the rack in the first direction X as side beams. The two ends of the connecting cross beam 11-3 are respectively fixedly connected with the corresponding column 11-2, one side connecting cross beam 11-3 has two ends respectively connected with two columns 11-2, and the other side connecting cross beam 11-3 has two ends respectively connected with the other two columns 11-2. For the four columns 11-2, two front columns 11-2 and two rear columns 11-2 can be arranged at the four corners of a rectangle, wherein one side edge of the first ventilation cabinet plate 11-1 is hingedly connected with one of the front columns 11-2, and the other side edge is buckled with the other front column 11-2.

[0048] In order to facilitate connection through the connecting piece 3, the connecting cross beam 11-3 is preferably provided with a plurality of connecting holes 11-4 extending outward along the third direction Z in sequence along the extension direction, and at least one connecting piece 3 is connected with the corresponding rack through the connecting hole 11-4. The third direction Z, the first direction X and the second direction Y are perpendicular to each other. The third direction Z can be consistent with the extension direction of the hinge shaft of the first ventilation cabinet plate 11-1.

[0049] In the above application, when the screw is connected, the screw first passes through the connecting piece 3 and then passes through the above-mentioned through hole. When a plurality of connecting holes 11-4 are arranged in sequence on the connecting cross beam 11-3, the two indoor units 1 can be arranged staggered in the front-rear direction to facilitate alignment or staggered distribution in the front-rear direction according to the position of the hole.

[0050] It should be noted that the connecting piece 3 can be provided only on the upper part of the rack, and for the lower part of the rack, it is generally fixed to the ground through a foot support structure; or the connecting piece 3 can be provided on the upper part and the rear part of the rack to fixedly connect the upper side and the rear side.

[0051] In some embodiments, the connecting piece 3 can be a connecting sheet, specifically, the connecting sheet is a plate, and the two ends of the connecting piece 3 are respectively fixedly connected with the corresponding connecting cross beam 11-3 through two screws arranged side by side along the second direction Y.

[0052] In some embodiments, the seal 2 can be a single sealing strip extending in the third direction Z. However, this arrangement does not provide a good buffering effect between the indoor units 1. Therefore, it is preferable that the seal 2 includes two first sealing strips 21 extending in the third direction Z and two second sealing strips 22 extending in the second direction Y. The two first sealing strips 21 and the two second sealing strips 22 are combined to form a rectangle, so that while sealing the gap between the two indoor fans 15, the circumferentially extending seal 2 is more conducive to buffering and protecting the two.

[0053] In some embodiments, the two first sealing strips 21 may be aligned with the two columns 11-2 on the corresponding side of the frame, and the two second sealing strips 22 may be aligned with the two crossbeams (such as connecting crossbeams 11-3) extending along the second direction Y on the corresponding side of the frame, so as to improve the pressure effect of the sealing strips.

[0054] In some embodiments, the indoor unit 1 generally includes a fan 15, wherein the fan 15 is disposed between the heat exchanger 12 and the air outlet 13, that is, disposed on the front side of the heat exchanger 12, and can be installed on the first fume hood plate 11-1.

[0055] In some embodiments, the interface of the heat exchanger 12 may be located on the air inlet side of the cabinet 11 to avoid front wiring affecting aesthetics. The interfaces can also be offset in either the Z-direction or the Y-direction to facilitate parallel cabling.

[0056] In some embodiments, as shown in the appendix Figure 1 As shown, four indoor units 1 are arranged side by side, from left to right: first indoor unit 1, second indoor unit 1, third indoor unit 1, and fourth indoor unit 1. Connectors 3 and seals 2 are provided between the first indoor unit 1 and the second indoor unit 1, between the second indoor unit 1 and the third indoor unit 1, and between the third indoor unit 1 and the fourth indoor unit 1, and the parallel operation method is the same.

[0057] In some embodiments, as shown in the appendix Figure 2As shown, the first indoor unit 1 and the second indoor unit 1 are taken as an example, the first indoor unit 1 has a connecting cross beam 11-3 and two vertical columns 11-2 on the side close to the second indoor unit 1, the two ends of the connecting cross beam 11-3 are fixedly connected with the front vertical column 11-2 and the rear vertical column 11-2 respectively; similarly, the second indoor unit 1 has a connecting cross beam 11-3 and two vertical columns 11-2 on the side close to the first indoor unit 1, the two ends of the connecting cross beam 11-3 are fixedly connected with the front vertical column 11-2 and the rear vertical column 11-2 respectively. A first sealing strip 21 is clamped between the rear vertical column 11-2 of the first indoor unit 1 and the rear vertical column 11-2 of the second indoor unit 1, and another first sealing strip 21 is clamped between the front vertical column 11-2 of the first indoor unit 1 and the front vertical column 11-2 of the second indoor unit 1; a second sealing strip 22 is clamped between the connecting cross beam 11-3 of the first indoor unit 1 and the connecting cross beam 11-3 of the second indoor unit 1. Along the second direction Y, a plurality of upward (toward the side away from the interior, thus outward) connecting holes 11-4 are arranged on the upper side of the connecting cross beam 11-3. As shown along the second direction Y, the connecting cross beam 11-3 of the first indoor unit 1 and the connecting cross beam 11-3 of the second indoor unit 1 are connected by four connecting pieces 3, and do not require uniform distribution.

[0058] In some embodiments, as shown in the accompanying drawings Figure 2 As shown, the connecting piece 3 is a flat plate structure, the connecting piece 3 is arranged across the connecting cross beam 11-3 of the first indoor unit 1 and the connecting cross beam 11-3 of the second indoor unit 1, and the two ends are respectively attached to the connecting cross beam 11-3 of the first indoor unit 1 and the connecting cross beam 11-3 of the second indoor unit 1, one end of the connecting piece 3 is fixedly connected with the connecting cross beam 11-3 of the first indoor unit 1 by two screws arranged side by side along the second direction Y; the other end of the connecting piece 3 is fixedly connected with the connecting cross beam 11-3 of the second indoor unit 1 by two screws arranged side by side along the second direction Y. The screw head is located on the upper side of the connecting piece 3. The connecting piece 3 is preferably a sheet metal piece, which can have the same structure as the connecting cross beam 11-3.

[0059] Based on the indoor unit parallel machine set provided in the above embodiments, the utility model also provides an air conditioning system, the air conditioning system includes any one of the indoor unit parallel machine set in the above embodiments; including an outdoor unit, in series with the indoor unit parallel machine set. Since the air conditioning system adopts the indoor unit parallel machine set in the above embodiments, the beneficial effects of the air conditioning system please refer to the above embodiments.

[0060] In some embodiments, each indoor unit 1 of the indoor unit parallel machine set is arranged in parallel with each other and in series with the outdoor unit, so that the number of indoor units 1 that are turned on can be selected when in use. The heat exchanger 12 of each indoor unit 1 is provided with a switch valve. Among them, each indoor unit 1 is arranged in parallel with each other, which means that the heat exchangers 12 between each indoor unit 1 are connected in parallel.

[0061] In some embodiments, based on the indoor unit and machine group provided in the above embodiments, the utility model further provides a ventilation channel, which comprises the indoor unit and machine group in any of the above embodiments; and comprises a ventilation opening, wherein the indoor unit and machine group is embedded at the ventilation opening. Since the ventilation channel adopts the indoor unit and machine group in the above embodiments, the beneficial effects of the ventilation channel please refer to the above embodiments. The indoor unit and machine group is embedded at the ventilation opening, that is, is blocked horizontally at the ventilation opening, so that the wind body passing through the ventilation opening must enter through the air inlet 14 of the indoor unit 1, and then flows out through the air outlet 13 of the indoor unit 1, and the entire indoor unit and machine group also needs to be sealed and connected with the wall of the ventilation opening.

[0062] In some embodiments, at least the air inlet 14 and / or the air outlet 13 of the indoor unit 1 is provided with an air valve, so that at least one indoor unit 1 can prevent the wind body from passing when it is stopped. Of course, each indoor unit 1 can be provided with an air valve correspondingly.

[0063] In the specification, each embodiment is described in a progressive manner, and each embodiment focuses on the difference from other embodiments. The same or similar parts between each embodiment can be referred to each other.

[0064] The above description of the disclosed embodiments enables a person skilled in the art to implement or use the utility model. Various modifications of the embodiments will be apparent to those skilled in the art, and the general principles defined herein can be implemented in other embodiments without departing from the spirit or scope of the utility model. Therefore, the utility model will not be limited to the embodiments shown herein, but will conform to the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A parallel indoor unit unit, characterized in that, include: Multiple indoor units (1) are arranged sequentially along a first direction. Each indoor unit (1) includes a cabinet (11) and a heat exchanger (12). The heat exchanger (12) is placed inside the cabinet (11). The cabinet (11) has an air outlet (13) on the front side and an air inlet (14) on the rear side in a second direction. The air entering through the rear air inlet (14) can exchange heat with the heat exchanger (12) and then flow out through the front air outlet (13). The first direction and the second direction are arranged intersecting. A sealing element (2) is disposed between adjacent indoor units (1) to seal the gap between them in the second direction; Connector (3), adjacent indoor units (1) are connected to each other in cabinet (11) via connector (3) to fix their positions to each other.

2. The indoor unit parallel operation unit according to claim 1, characterized in that, The cabinet (11) includes a frame and multiple cabinet panels disposed on the corresponding sides of the frame; in the second direction, in the cabinet: the cabinet panel located at the frontmost side is a first ventilation cabinet panel (11-1), and the cabinet panel located at the rearmost side is a second ventilation cabinet panel; honeycomb holes are formed on the first ventilation cabinet panel (11-1) to serve as the air outlet (13), and honeycomb holes are formed on the second ventilation cabinet panel to serve as the air inlet (14); the two ends of the connector (3) are respectively used to connect to the frame of the corresponding indoor unit (1).

3. The indoor unit parallel operation unit according to claim 2, characterized in that, The first fume hood panel (11-1) is a cabinet door, which is hinged to the frame of the corresponding cabinet (11), and the rotation axis, the first direction, and the second direction of the first fume hood panel (11-1) are all perpendicular to each other.

4. The indoor unit parallel operation unit according to claim 3, characterized in that, The connector (3) is connected to the corresponding frame via a screw (4).

5. The indoor unit parallel operation unit according to claim 2, characterized in that, The frame includes at least four uprights (11-2) extending along a third direction and at least two connecting beams (11-3) extending along a second direction. The two connecting beams (11-3) are located on both sides of the frame in the first direction. The two ends of the connecting beams (11-3) are fixedly connected to the corresponding uprights (11-2). The connecting beams (11-3) are provided with a plurality of connecting holes (11-4) extending along the third direction and facing outward. At least one connector (3) is connected to the corresponding frame through the connecting holes (11-4). The third direction, the first direction, and the second direction are all perpendicular to each other.

6. The indoor unit parallel operation unit according to any one of claims 2-5, characterized in that, The sealing element (2) includes two first sealing strips (21) extending along a third direction and two second sealing strips (22) extending along a second direction. The two first sealing strips (21) and the two second sealing strips (22) are combined to form a rectangle. The third direction, the first direction, and the second direction are all perpendicular to each other.

7. The indoor unit parallel operation unit according to claim 6, characterized in that, The two first sealing strips (21) are respectively aligned with the two uprights (11-2) on the corresponding side of the frame, and the two second sealing strips (22) are respectively aligned with the two crossbeams extending along the second direction on the corresponding side of the frame.

8. The indoor unit parallel operation unit according to claim 6, characterized in that, The indoor unit (1) also includes a fan (15), which is located between the heat exchanger (12) and the air outlet (13); the interface of the heat exchanger (12) is located on the air inlet side of the cabinet (11).

9. An air conditioning system, comprising an outdoor unit, characterized in that, It also includes the indoor unit parallel unit as described in any one of claims 1-8, wherein the indoor units of the indoor unit parallel unit are connected in parallel with each other and connected in series with the outdoor unit.

10. A ventilation duct, comprising a ventilation opening, characterized in that, It also includes an indoor unit parallel operation unit as described in any one of claims 1-8, wherein the indoor unit parallel operation unit is embedded in the vent.

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