CN220624205U - Independent double-circulation air conditioner indoor unit - Google Patents

Abstract

The utility model discloses an independent double-circulation air conditioner indoor unit, which comprises a shell and a main control device arranged in the shell, wherein the shell comprises an upper cavity and a lower cavity, a fan is arranged in the upper cavity, a V-shaped cavity is fixedly arranged in the lower cavity, air inlets are formed in two opposite bevel sides of the V-shaped cavity, an air outlet is formed in the top of the V-shaped cavity and communicated with the upper cavity through the air outlet, an evaporation coil group is arranged in the V-shaped cavity at a position close to the air inlet, and the main control device is arranged on the side wall of the V-shaped cavity; when outside air gets into V die cavity through the air intake, can pass through evaporating coil and contact with evaporating coil, cool down with the cold exchange group, make the inside cold air that is full of V die cavity, cool down the lateral wall of V die cavity, the lateral wall of V die cavity cools down the automatically controlled component of the main control device who installs at the lateral wall, guarantees automatically controlled component's stability.

Description

Independent double-circulation air conditioner indoor unit

Technical Field

The utility model relates to the technical field of air conditioner indoor units, in particular to an independent double-circulation air conditioner indoor unit.

Background

The traditional air-cooled room air conditioner with large cooling capacity, the fluorine pump natural cooling air conditioner (independent circulation) and other machine room precise air conditioners are special air conditioners designed for modern electronic equipment machine rooms, and mainly comprise a large number of dense electronic elements because the working precision and the reliability of the machine room precise air conditioner are much higher than those of a common air conditioner, so that the precise control of the air conditioner is improved. An independent main control device is generally arranged for controlling the operation of internal electronic elements and the like, the main control device is generally arranged in an internal machine or fixed outside the internal machine, the elements of the existing main control device of the precise air conditioner can generate heat when working, in the prior art, an evaporation coil is generally arranged at an air outlet position, the main control device arranged in the internal machine cannot be cooled, and meanwhile, the main control device arranged on the outer side after sealing is difficult to cool the interior because of sealing, but the heat generated by two mounting modes can be transmitted into a machine room, so that the refrigerating power of the precise air conditioner can be improved, and the energy consumption is increased; meanwhile, if the electric control element heats and does not cool in time, faults and service life influence can be caused on the electric control element, and influences can be caused on refrigeration and use of the air conditioner.

Therefore, how to solve the problem of high internal temperature of the electric control cabinet when the internal components of the double-system precise air conditioner electric control cabinet work in the prior art becomes a technical problem to be solved urgently.

In view of this, the prior art is still to be improved and developed.

Disclosure of Invention

In view of the above-mentioned shortcomings of the prior art, the present utility model aims to provide an independent dual-cycle air conditioner indoor unit, which aims to solve the technical problem of how to manufacture an independent dual-cycle air conditioner indoor unit to solve the damage of an electric control element caused by heat generated by the electric control element in the air conditioner.

The technical scheme adopted for solving the technical problems is as follows:

the utility model provides an independent double circulation air conditioner inner unit, includes the casing and installs the master control device inside the casing, its characterized in that, the casing includes:

the upper chamber is positioned at the upper part of the inside of the shell, and a fan is arranged in the upper chamber;

the lower cavity is positioned at the lower part in the shell, the air inlets are formed in the two opposite bevel sides of the V-shaped cavity which are fixedly arranged in the lower cavity, an air outlet round hole is formed in the top of the V-shaped cavity, the V-shaped cavity is communicated with the upper cavity through the air outlet round hole, an evaporation coil group is arranged at the position, close to the air inlet, in the V-shaped cavity, and the main control device is arranged on the front side wall of the V-shaped cavity.

Further, the evaporation coil group includes:

the first evaporation coil is positioned in the V-shaped cavity and close to the air inlet side, and is arranged in parallel with the bevel edge of the V-shaped cavity;

the second evaporation coil is positioned in the V-shaped cavity and far away from the air inlet side, and is arranged in parallel with the bevel edge of the V-shaped cavity;

and the communication tube group is used for communicating the first evaporating coil and the second evaporating coil with the air conditioner outdoor unit so that the first evaporating coil and the second evaporating coil form circulation with the air conditioner outdoor unit.

Further, the first evaporating coil comprises a plurality of first tube groups, two ends of the first tube groups are fixedly mounted on the side wall of the V-shaped cavity, and the second evaporating coil comprises a plurality of second tube groups, two ends of the second tube groups are fixedly mounted on the side wall of the V-shaped cavity.

Further, the communicating tube group includes:

the first communication pipe is arranged on the side wall of the lower cavity and is an inlet pipe, a plurality of inlet holes are formed in the first communication pipe, and the inlet holes are respectively communicated with the inlets of the second pipe group;

the second communicating pipe is arranged on the side wall of the lower cavity and is an outlet pipe, a plurality of outlet holes are formed in the second communicating pipe, and the outlet holes are respectively communicated with the outlet of the second pipe group;

the third communicating pipe is arranged on the side wall of the lower cavity, the third communicating pipe is an inlet pipe, a split joint is fixedly arranged at the outlet end of the third communicating pipe, and the split joint is communicated with inlets of the first pipe groups through pipelines;

and the fourth communicating pipe is arranged on the side wall of the lower cavity and is an outlet pipe, a plurality of outlet holes are formed in the fourth communicating pipe, and the outlet holes are respectively communicated with the outlet of the first pipe group.

Further, the first evaporating coil and the second evaporating coil are V-shaped, and the area of one side of the first evaporating coil, which is close to the air inlet, is larger than the area of the air inlet.

Further, the side wall of the lower chamber is provided with an air return opening.

Furthermore, a filter screen is fixedly arranged on one side of the V-shaped cavity, which is provided with the air inlet.

Further, the master control device is arranged on the side wall of the V-shaped cavity and is arranged at a position between the second evaporating coils.

Further, a vent is formed in the inner bottom wall of the upper cavity, and a guide ring is fixedly arranged in the vent.

Further, an air outlet is formed in the side wall of the upper cavity.

Compared with the prior art, the utility model has the beneficial effects that:

in the utility model, an upper cavity and a lower cavity are arranged in a shell, a fan is arranged in the upper cavity, the fan rotates, air is drawn from the outer side of the shell to enter the lower cavity, then the air enters a V-shaped cavity, and the air enters the upper cavity through a ventilation round hole of the V-shaped cavity; simultaneously, the inside V die cavity that sets up of cavity down, place evaporating coil group in V die cavity inside, and be close to the air intake of the both sides limit of V die cavity, when outside air gets into V die cavity through the air intake, can pass through evaporating coil and contact with evaporating coil, cool and heat exchange group cools down, make the inside cold air that is full of V die cavity, the cold air makes the lateral wall of V die cavity cool down, then the lateral wall of V die cavity cools down to the electrical components of the master control device who contacts with it, prevent the electrical components high temperature damage of master control device, in order to reach the effect of guaranteeing electronic components's stability.

Drawings

FIG. 1 is a schematic view of the overall assembly structure of the present utility model;

FIG. 2 is a schematic view of the internal structure of the housing of the present utility model;

FIG. 3 is a schematic rear view of the housing of the present utility model;

FIG. 4 is a schematic cross-sectional view of the housing of the present utility model;

FIG. 5 is a schematic view of a first evaporator coil of the present utility model;

FIG. 6 is a schematic view of a first tube assembly of the present utility model;

FIG. 7 is a schematic diagram of a second evaporator coil of the present utility model;

FIG. 8 is a schematic view of a second tube set according to the present utility model;

fig. 9 is a schematic diagram of an installation structure of a master control device according to the present utility model.

The numerical labels in the figures are represented as: 1. a housing; 2. a master control device; 3. an upper chamber; 31. a blower; 32. an air outlet; 33. a guide ring; 4. a lower chamber; 41. a V-shaped cavity; 411. an air inlet; 412. a filter screen; 413. an electric control mounting plate; 42. an evaporation coil group; 421. a first evaporation coil; 4211. a first tube group; 422. a second evaporation coil; 4221. a second tube group; 423. a communicating tube group; 4231. a first communication pipe; 4232. a second communicating pipe; 4233. a third communicating pipe; 4234. a fourth communicating pipe; 43. an air return port; 5. a shunt joint.

Detailed Description

In order to make the objects, technical solutions and effects of the present utility model clearer and more specific, the present utility model will be described in further detail below with reference to the accompanying drawings and examples. It should be understood that the specific embodiments described herein are for purposes of illustration only and are not intended to limit the scope of the utility model.

In the description of the present utility model, it should be understood that the terms "center", "longitudinal", "lateral", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc. indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, are merely for convenience in describing the present utility model and simplifying the description, and do not indicate or imply that the devices or elements referred to must have a specific orientation, be configured and operated in a specific orientation, and thus should not be construed as limiting the present utility model. Furthermore, the terms "first," "second," and the like, are used for descriptive purposes only and are not to be construed as indicating or implying a relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defining "a first" or "a second" may explicitly or implicitly include one or more such feature. In the description of the present utility model, unless otherwise indicated, the meaning of "a plurality" is two or more.

In the description of the present utility model, it should be noted that, unless explicitly specified and limited otherwise, the terms "mounted," "connected," and "connected" are to be construed broadly, and may be either fixedly connected, detachably connected, or integrally connected, for example; can be mechanically or electrically connected; can be directly connected or indirectly connected through an intermediate medium, and can be communication between two elements. The specific meaning of the above terms in the present utility model will be understood in specific cases by those of ordinary skill in the art.

Because the existing double-system room-level air conditioner, fluorine pump natural cooling air conditioner and other precise air conditioners need to use a large number of electric elements under the precise control of the air conditioner, a main control device is arranged for controlling the electric elements, but the electric elements of the main control device work to generate heat, so that the refrigeration energy consumption of the air conditioner is increased, and the electric elements generate heat without timely cooling, so that the air conditioner refrigeration effect is affected due to the influence of high temperature.

In view of the shortcomings of the prior art, the present embodiment provides an independent dual-cycle air conditioner indoor unit, and specific reference may be made to the following:

as shown in fig. 1 and fig. 2, the independent double-circulation air conditioner indoor unit provided by the embodiment comprises a casing 1 and a main control device 2 installed in the casing 1, wherein the main control device 2 mainly comprises a main controller, a return air temperature and humidity sensor, an air supply temperature sensor and other devices, the main controller is used for detecting data of various sensors, and an action command is sent to each execution device to perform corresponding logic action through a built-in logic control strategy;

specifically, as shown in fig. 2 and fig. 4, the casing 1 includes an upper chamber 3 and a lower chamber 4, a partition board is installed inside the casing 1, the inner space of the casing 1 is divided into the upper chamber 3 and the lower chamber 4 through the arrangement of the partition board, an air outlet 32 is formed in the side wall of the upper chamber 3, a ventilation opening is formed in the center position of the partition board, a guide ring 33 matched with the ventilation opening is arranged on the upper part of the partition board, the inside of the guide ring 33 is arc-shaped, air circulation is facilitated, a fan 31 is arranged inside the upper chamber 3, the fan 31 is fixedly installed on the top wall of the upper chamber 3, the fan 31 transfers air of the lower chamber 4 to the upper chamber 3 through rotation, and meanwhile, the air is discharged through the air outlet 32 of the upper chamber 3; the V-shaped cavity 41 is arranged in the lower cavity 4, the top of the V-shaped cavity 41 is fixed with the bottom of the partition plate, a ventilation round hole is formed in the top of the V-shaped cavity 41, the ventilation round hole and the ventilation opening are coaxially arranged, the diameters of the ventilation round hole and the ventilation opening are the same, the V-shaped cavity 41 is communicated with the upper cavity 3 through the ventilation round hole, and the side walls of the V-shaped cavity 41 are assembled through the cooperation of the fixing plates.

Further, air inlets 411 are formed in two opposite bevel sides of the V-shaped cavity 41, the air inlets 411 are rectangular, the air inlets 411 are air inlet places, evaporation coil groups 42 are fixedly mounted in the positions, close to the air inlets 411, of the inner part of the V-shaped cavity 41, and the evaporation coil groups 42 are used for exchanging heat and heat of indoor air to achieve the effect of cooling or heating the air; the main control device 2 is arranged on the front side wall of the V-shaped cavity 41 (shown in figure 2); through the device, the evaporation coil group 42 that the air intake 411 of V die cavity 41 set up makes the inside cold air that is full of V die cavity 41, and cold air makes the lateral wall of V die cavity 41 cool down, and the lateral wall cools down the main control device 2 fixed with it that contacts to reach the effect of cooling down the electronic component of main control device 2, make automatically controlled device steady operation, prevent the problem that breaks down under the high temperature.

Under the effect of fan 31, get into casing 1 with the outside indoor air of casing 1, and through air intake 411 and evaporation coil group 42, carry out cold and hot exchange through evaporation coil group 42 to the air, get into V die cavity 41, inside cold air cools down V die cavity 41 lateral wall, the lateral wall cools down the electrical components of main control device 2 that contact installation with it, then get into cavity 3 on the water conservancy diversion circle 33 on passing through the baffle to discharge casing 1, in order to reach the effect of the inside air cycle of air conditioner.

Further, the side wall of the side of the V-shaped cavity 41, on which the main control device 2 is arranged, can be an aluminum plate, and the aluminum plate has a good heat conduction coefficient and can be used for cooling the electric control element better.

Preferably, the fan 31 is an EC fan 31, and the EC fan 31 refers to a centrifugal fan 31 adopting a digital brushless direct-current outer rotor motor or a centrifugal fan 31 adopting an EC motor; compared with the common fan 31, the EC fan 31 has the characteristics of high intelligence, high energy saving, high efficiency, long service life, small vibration, low noise, continuous and uninterrupted operation and the like.

As shown in fig. 2 and fig. 5, the evaporating coil includes a first evaporating coil 421, a second evaporating coil 422 and a communicating tube group 423, the communicating tube group 423 communicates the first evaporating coil 421 and the second evaporating coil 422 with an external air conditioner, and the first evaporating coil 421 and the second evaporating coil 422 form a circulation with a pipeline inside the external air conditioner so as to achieve the effect of matching the internal air conditioner with the external air conditioner and continuously cooling or heating;

specifically, as shown in fig. 3 and fig. 4, the first evaporating coil 421 is located at the side of the V-shaped cavity 41, which is close to the air inlet 411, and the first evaporating coil 421 is installed at both sides of the V-shaped cavity 41, which is close to the air inlet 411, so that air entering from the air inlet 411 must pass through the first evaporating coil 421 to enter the V-shaped cavity 41, and meanwhile, the first evaporating coil 421 is parallel to the oblique side of the V-shaped cavity 41, so as to prevent a gap between the first evaporating coil 421 and the air inlet 411, and reduce the effect of cold-heat exchange; the second evaporation coil 422 is located at one side of the V-shaped cavity 41 away from the air inlet 411, the second evaporation coil 422 is parallel to the inclined edge of the V-shaped cavity 41, that is, the second evaporation coil 422 is parallel to the first evaporation coil 421, and a certain distance is reserved between the second evaporation coil 422 and the first evaporation coil 421, due to the arrangement of the V-shaped cavity 41, the second evaporation coil 422 is located between the first evaporation coils 421, and the area of the second evaporation coil 422 is smaller than that of the first evaporation coil 421 due to the limitation of the V-shaped cavity 41, and meanwhile, the second evaporation coil 422 is identical to the first evaporation coil 421 and is arranged at one side of the two inclined edges of the V-shaped cavity 41.

The return air temperature sensor is arranged on one side of the first evaporating coil 421, namely the outer side of the air inlet 411 of the V-shaped cavity 41, and the air supply temperature sensor is arranged at the position of the air outlet 32; the hot return air flow in the machine room or the room passes through the first evaporating coil 421 to exchange heat with the hot return air flow sufficiently, and if the air supply temperature can meet the requirement of the air inlet temperature of the machine room or the room at the moment, the second evaporating coil 422 does not need to be started; if not, the second evaporation coil 422 is started to assist in working, and the first evaporation coil 421 and the second evaporation coil 422 are independent from each other and can be matched with different external machines to be used, so that different application occasions are met.

As shown in fig. 5 and 6, the first evaporation coil 421 includes a plurality of first tube groups 4211, two ends of the first tube group 4211 are fixedly mounted to the side wall of the V-shaped cavity 41, the second evaporation coil 422 includes a plurality of second tube groups 4221, two ends of the second tube group 4221 are fixedly mounted to the side wall of the V-shaped cavity 41, the first tube group 4211 and the second tube group 4221 are composed of one or more straight tubes and bent tubes, and the first tube group 4211 and the second tube group 4221 are provided with inlets and outlets;

specifically, as shown in fig. 5, fig. 7 and fig. 8, a plurality of holes are formed on two vertical side walls of the V-shaped cavity 41 on the hypotenuse side, and the holes are fixed to two ends of the straight tube between the first tube group 4211 and the second tube group 4221, so as to achieve the effect of fixing the first evaporation coil 421 and the second evaporation coil 422, prevent the first evaporation coil 421 and the second evaporation coil 422 from vibrating, generate abnormal sound, and affect the overall stability of the device.

As shown in fig. 2, the communicating tube group 423 includes a first communicating tube 4231, a second communicating tube 4232, a third communicating tube 4233, and a fourth communicating tube 4234, the first communicating tube 4231 and the second communicating tube 4232 being a group and communicating with the first evaporation coil 421, the third communicating tube 4233 and the fourth communicating tube 4234 being a group and communicating with the second evaporation coil 422;

the first communication pipe 4231 is fixedly arranged on the side wall of the lower chamber 4, the first communication pipe 4231 is an inlet pipe, one end of the first communication pipe 4231 is communicated with a pipeline of an external air conditioner, the other end of the first communication pipe 4231 is provided with a plurality of inlet holes, and the inlet holes are respectively communicated with inlets of the second pipe groups 4221;

the second communicating pipe 4232 is fixedly installed on the side wall of the lower chamber 4, the second communicating pipe 4232 is an outlet pipe, one end of the second communicating pipe 4232 is communicated with a pipeline of an external machine of the air conditioner, the other end of the second communicating pipe is provided with a plurality of outlet holes, and the plurality of outlet holes are respectively communicated with the outlets of the plurality of second pipe groups 4221;

the first communication pipe 4231 and the second communication pipe 4232 are communicated with the outlet and the inlet of the second pipe group 4221, and meanwhile, the other ends of the first communication pipe 4231 and the second communication pipe 4232 are respectively connected with the outlet and the inlet of a pipeline of an air conditioner external unit, so that the pipeline of the air conditioner external unit and the second evaporation coil 422 formed by the second pipe group 4221 form circulation, and the effect of continuously carrying out cold and heat exchange through the second evaporation coil 422 is achieved;

the third communicating pipe 4233 is fixedly arranged on the side wall of the lower cavity 4, the third communicating pipe 4233 is an inlet pipe, one end of the third communicating pipe 4233 is communicated with a pipeline of an external air conditioner, the other end of the third communicating pipe 4233 is fixedly provided with a split joint 5, a plurality of inlets are formed in the split joint 5 and correspond to the inlets of the plurality of first pipe groups 4211, and the split joint 5 is communicated with the inlets of the plurality of first pipe groups 4211 through the pipeline;

the fourth communicating pipe 4234 is fixedly installed on the side wall of the lower chamber 4, the fourth communicating pipe 4234 is an outlet pipe, one end of the fourth communicating pipe 4234 is communicated with a pipeline of an external machine of the air conditioner, a plurality of outlet holes are formed in the other end of the fourth communicating pipe, and the outlet holes are respectively communicated with the outlets of the first pipe groups 4211;

the third communication pipe 4233 and the fourth communication pipe 4234 are communicated with the outlet and the inlet of the first pipe group 4211, and meanwhile, the other ends of the third communication pipe 4233 and the fourth communication pipe 4234 are respectively connected with the outlet and the inlet of a pipeline of an air conditioner external unit, so that the pipeline of the air conditioner external unit and the first evaporation coil 421 formed by the first pipe group 4211 form circulation, and the effect of continuously carrying out cold and heat exchange through the first evaporation coil 421 is achieved.

The first evaporating coil 421 and the second evaporating coil 422 are V-shaped and are respectively positioned on the bevel side of the V-shaped cavity 41, the second evaporating coil 422 is arranged above the first evaporating coil 421, the area of the first evaporating coil 421 is smaller than that of the second evaporating coil 422, and the area of the first evaporating coil 421 close to the air inlet 411 is larger than that of the air inlet 411; the V-shaped arrangement of the first evaporating coil 421 and the second evaporating coil 422 not only solves the problems of large occupied area and high manufacturing cost of two sets of independent evaporating coils of a double system in the prior art, but also can improve the cold and heat exchange effect of an air conditioner and reduce the energy consumption of the air conditioner by the overlapped installation mode of the first evaporating coil 421 and the second evaporating coil 422; the two sets of the evaporating coils are mutually independent, can be matched with different external machines for use, can meet different application occasions, and has higher practicability.

As shown in fig. 1, the side wall of the lower chamber 4 is provided with an air return opening 43, and air outside the casing 1 is sucked into the casing 1 through the air return opening 43.

The V-shaped cavity 41 is provided with a filter screen 412 fixedly arranged on one side of the air inlet 411, the filter screen 412 is fixed on the side wall of the inclined side of the V-shaped cavity 41, the fan 31 sucks air outside the shell 1 to enter the shell 1, the air enters the V-shaped cavity 41 through the filter screen 412, and the filter screen 412 is used for filtering impurities of the outside air.

As shown in fig. 2 and fig. 9, the main control device 2 is installed on the side wall of the V-shaped cavity 41 and is located at a position between the second evaporating coils 422, the main control device 2 and the second evaporating coils 422 do not interfere with each other, the main control device 2 is installed on the side wall of the V-shaped cavity 41, not only is space saved, but also the fixing plate of the shell 1 can be detached, and the main control device 2 is convenient to check and maintain.

The device can be matched with different external machines for use, for example, two sets of air-cooled condensers are matched, and the traditional double-system room air conditioner is formed. When the return air temperature of the machine room is greater than 24 ℃ plus deviation, starting the system (namely starting the first evaporation coil 421); when the machine room return air temperature is greater than 27°c+ deviation, the system 1 alone cannot meet the requirement, and the system two (i.e. the second evaporation coil 422) needs to be started for auxiliary refrigeration. The two sets of refrigerating systems are independent and mutually backup, and can realize the wheel inspection work through the main control system, reasonably distribute the running time of the unit and prolong the service life of the unit.

The natural cooling technology of the fluorine pump can also be combined, and the fluorine pump system and the compressor system independently operate. In hot summer, the compressor system is running; in transitional seasons, the compressor is operated in a frequency-reducing mode, and the fluorine pump system assists in refrigeration; in cold winter, the indoor and outdoor temperature difference is large, the compressor system is closed, and the requirement can be met by independently operating the fluorine pump system.

In the south area, the natural cooling technology of the fluorine pump cannot be widely applied due to the temperature difference between the indoor and the outdoor, and the natural cooling technology can be used together with the evaporative cooling technology. The compressor system and the fluorine pump system are adopted, and the external machine adopts an evaporative cooling technology. In winter, the fluorine pump system is started to completely meet the requirements of a machine room. In summer, the compressor is started to assist in refrigeration. In this way, the PUE of the data center can be significantly reduced.

Other embodiments of the utility model will be apparent to those skilled in the art from consideration of the specification and practice of the disclosed embodiments. This utility model is intended to cover any variations, uses, or adaptations of the utility model following, in general, the principles of the utility model and including such departures from the present disclosure as come within known or customary practice within the art to which the utility model pertains. It is intended that the specification and examples be considered as exemplary only, with a true scope and spirit of the utility model being indicated by the following claims.

Claims (10)

1. The utility model provides an independent double circulation air conditioner inner unit, includes the casing and installs the master control device inside the casing, its characterized in that, the casing includes:

the upper chamber is positioned at the upper part of the inside of the shell, and a fan is arranged in the upper chamber;

the lower cavity is positioned at the lower part in the shell, the air inlets are formed in the two opposite bevel sides of the V-shaped cavity which are fixedly arranged in the lower cavity, an air outlet round hole is formed in the top of the V-shaped cavity, the V-shaped cavity is communicated with the upper cavity through the air outlet round hole, an evaporation coil group is arranged at the position, close to the air inlet, in the V-shaped cavity, and the main control device is arranged on the front side wall of the V-shaped cavity.

2. The independent double circulation air conditioner indoor unit of claim 1, wherein the evaporation coil group comprises:

the first evaporation coil is positioned in the V-shaped cavity and close to the air inlet side, and is arranged in parallel with the bevel edge of the V-shaped cavity;

the second evaporation coil is positioned in the V-shaped cavity and far away from the air inlet side, and is arranged in parallel with the bevel edge of the V-shaped cavity;

and the communication tube group is used for communicating the first evaporating coil and the second evaporating coil with the air conditioner outdoor unit so that the first evaporating coil and the second evaporating coil form circulation with the air conditioner outdoor unit.

3. The stand-alone dual cycle air conditioning indoor unit of claim 2, wherein the first evaporator coil comprises a plurality of first tube sets with both ends of the first tube sets fixedly mounted to the V-cavity side walls, and the second evaporator coil comprises a plurality of second tube sets with both ends of the second tube sets fixedly mounted to the V-cavity side walls.

4. An independent dual cycle air conditioner indoor unit according to claim 3, wherein the communicating tube group comprises:

the first communication pipe is arranged on the side wall of the lower cavity and is an inlet pipe, a plurality of inlet holes are formed in the first communication pipe, and the inlet holes are respectively communicated with the inlets of the second pipe group;

the second communicating pipe is arranged on the side wall of the lower cavity and is an outlet pipe, a plurality of outlet holes are formed in the second communicating pipe, and the outlet holes are respectively communicated with the outlet of the second pipe group;

the third communicating pipe is arranged on the side wall of the lower cavity, the third communicating pipe is an inlet pipe, a split joint is fixedly arranged at the outlet end of the third communicating pipe, and the split joint is communicated with inlets of the first pipe groups through pipelines;

and the fourth communicating pipe is arranged on the side wall of the lower cavity and is an outlet pipe, a plurality of outlet holes are formed in the fourth communicating pipe, and the outlet holes are respectively communicated with the outlet of the first pipe group.

5. The indoor unit of claim 4, wherein the first and second evaporator coils are V-shaped, and the area of the first evaporator coil near the air inlet is larger than the area of the air inlet.

6. The independent double-circulation air conditioner indoor unit of claim 1, wherein the lower chamber side wall is provided with an air return opening.

7. The independent double-circulation air conditioner indoor unit of claim 5, wherein a filter screen is fixedly arranged on one side of the V-shaped cavity, which is provided with the air inlet.

8. The stand-alone dual cycle air conditioner indoor unit of claim 1, wherein the main control device is mounted on the V-cavity side wall at a location between the second evaporator coils.

9. The independent double-circulation air conditioner indoor unit of claim 1, wherein the inner bottom wall of the upper chamber is provided with a vent and a guide ring is fixedly arranged in the vent.

10. The independent double-circulation air conditioner indoor unit of claim 1, wherein the upper chamber side wall is provided with an air outlet.