CN223924958U - Air return box, air conditioner indoor unit and air conditioning system - Google Patents

Abstract

The utility model discloses a return air box, an air conditioner indoor unit and an air conditioning system, and relates to the technical field of air conditioning equipment, wherein the return air box comprises an organic box body and a fan assembly, the rear side of the box body is configured to be allowed to be installed on a supporting body, a hollow return air cavity is formed in the box body, an air return opening communicated with the return air cavity is formed in the upper side or the lower side of the box body, a position avoiding opening connected with the air return opening is formed in the rear side of the box body, and the fan assembly is arranged in the return air cavity. This return air case is through the position mouth of keeping away of seting up at the quick-witted case main part rear side, for maintenance personnel provides more spacious operating space for when carrying out maintenance, part change etc. to the return air case related operation, the operator need not to dismantle the rear panel and can easily accomplish related operation, has avoided the maintenance dilemma that leads to because of the rear panel can't dismantle, thereby has simplified operation flow greatly, has reduced the degree of difficulty of related operation.

Description

Air return box, air conditioner indoor unit and air conditioning system

Technical Field

The utility model relates to the technical field of air conditioning equipment, in particular to a return air box, an air conditioning indoor unit and an air conditioning system.

Background

The fan coil is used as an indispensable terminal device in a central air conditioning system, and has the core function of realizing the refrigeration or heating of indoor air by heat exchange between circulating air and a refrigerant or a heating medium, thereby maintaining the comfort of indoor environment. In the integral structure of the fan coil, the air return box is responsible for effectively guiding indoor air to a coil area for heat exchange treatment and sending the treated air back into the room to form a complete air circulation system.

At present, the air return box generally adopts a fully-packaged structural form, and the structure can protect internal components from the interference of external environment to a certain extent, but also brings about some non-neglectable problems. Especially, when the inside maintenance of returning air box is carried out, even when changing its internal components, the design of full package formula return air box often leads to the back panel to closely laminate with wall body or other structures, and the operating space who remains for the operator is very limited, and the operator often need dismantle the back panel of returning air box just can touch and carry out relevant operation, and this operation is complicated not only to, in the dismantlement process, the operator still probably need with the help of special instrument or take destructive means, this has not only increased cost of maintenance and time, still probably cause the harm to the overall structure of returning air box. More seriously, in some extreme cases, the rear panel cannot be removed due to space restrictions, and an operator may have to forego replacement of the failed parts, thereby seriously affecting the normal operation of the air conditioning system and the comfort of the indoor environment.

Disclosure of utility model

The embodiment of the utility model aims to provide a return air box, an air conditioner indoor unit and an air conditioning system, which can solve the problems in the prior art.

In order to achieve the above purpose, the utility model adopts the following technical scheme:

In a first aspect, there is provided a return air box comprising:

The back side of the case body is configured to be allowed to be mounted on the supporting body, a hollow return air cavity is formed in the case body, an air return opening communicated with the return air cavity is formed in the upper side or the lower side of the case body, and a clearance opening connected with the air return opening is formed in the back side of the case body;

The fan assembly is arranged in the return air cavity.

As an alternative embodiment, the return air inlet is disposed to extend in the width direction of the chassis main body.

As an optional implementation manner, the dimension of the avoidance port along the width direction of the case body is consistent with the return air port.

As an optional implementation manner, the fan assembly is arranged at one end of the return air cavity, which is close to the return air inlet and the avoidance port, and the fan assembly is at least partially exposed out of the case main body through the return air inlet and the avoidance port;

The fan assembly includes:

Motor, and

And the impeller is in driving connection with the motor.

As an alternative embodiment, the opposite ends of the motor are respectively provided with an output shaft which rotates synchronously;

The two impellers are coaxially connected with two output shafts of the motor respectively, and the two impellers are arranged in the return air cavity along the width direction of the case body at intervals.

As an alternative embodiment, the case body includes:

A first box body for providing the installation space of the fan assembly, the first box body being provided with the return air inlet and the avoidance opening, and

The second box is installed in the first box is kept away from the return air inlet and the one end of keeping away the position mouth, the second box is inside with the inside intercommunication of first box is in order to form the return air chamber, the second box is kept away from the one end of first box has been seted up the intercommunication the air outlet in return air chamber, the inside of second box is used for providing coil pipe subassembly's installation space.

As an alternative embodiment, a top plate is arranged at the top of the first box body, and a first plate edge is formed at one end of the top plate away from the second box body;

The side plates are respectively arranged on two opposite sides of the top plate in the width direction, and a second plate edge which is inclined from top to bottom in the direction away from the second box body to the direction close to the second box body is formed on one side of the side plates away from the second box body;

the bottoms of the two side plates are connected through a bottom plate, and a third plate edge is formed on one side of the bottom plate away from the second box body;

The first plate edge, the second plate edge and the third plate edge are connected and enclosed to form the air return opening and the avoidance opening.

As an alternative implementation manner, one end of the top plate, which is far away from the second box body, is further provided with a mounting plate which is turned downwards, and one end of the mounting plate, which is far away from the first box body, forms the first plate edge.

In a second aspect, there is provided an air conditioning indoor unit comprising a return air box as described in the first aspect.

In a third aspect, an air conditioning system is provided, comprising an air conditioning indoor unit as described in the second aspect.

The utility model has the beneficial effects that the design of the rear panel is canceled through the avoidance opening arranged at the rear side of the case main body, a more spacious operation space is provided for maintenance personnel, the problem of space limitation faced by the full-package type air return case in related operation is effectively solved, when the air return case is subjected to related operations such as overhauling and maintenance, component replacement and the like, an operator can easily complete the related operation without disassembling the rear panel, and the maintenance dilemma caused by the fact that the rear panel cannot be disassembled is avoided, thereby greatly simplifying the operation flow and reducing the difficulty of the related operation.

Through the rational arrangement to return air inlet and keep away a position mouthful, both constitute a bigger air circulation route jointly to help reducing resistance and the vortex of air in the flow process, improve air circulation efficiency, reach the purpose that accelerates indoor temperature regulation speed, promote air conditioning system's whole efficiency. Meanwhile, due to the existence of the avoidance port, the rear side of the air return box is in a semi-open state, a larger air return space is formed between the air return box and the supporting main body, the space is increased to facilitate air flow to flow more smoothly, turbulence and vortex generated by the air flow in a narrow space are reduced, noise generated during air flow is effectively reduced, hearing in the using process is effectively improved, and the using experience of a user is improved.

Drawings

The utility model is described in further detail below with reference to the drawings and examples.

FIG. 1 is an isometric view of a return air box according to an embodiment of the present utility model;

FIG. 2 is a second perspective view of the return air box according to the embodiment of the present utility model;

FIG. 3 is a side view of the return air box according to an embodiment of the present utility model;

fig. 4 is a bottom view of the return air box according to an embodiment of the present utility model.

10 Parts of a machine case main body, 11 parts of a first box body, 111 parts of an air return opening, 112 parts of a clearance opening, 113 parts of a top plate, 1131 parts of a mounting plate, 1132 parts of a first plate edge, 114 parts of a side plate, 1141 parts of a second plate edge, 115 parts of a bottom plate, 1151 parts of a third plate edge, 116 parts of a back plate, 12 parts of the second box body, 121 parts of an air outlet, 13 parts of a fan assembly, 131 parts of a motor, 1311 parts of an output shaft, 132 parts of an impeller, 14 parts of a coil assembly, 20 parts of a supporting main body.

Detailed Description

In order to make the technical problems solved by the present utility model, the technical solutions adopted and the technical effects achieved more clear, the technical solutions of the embodiments of the present utility model are described in further detail below, and it is obvious that the described embodiments are only some embodiments of the present utility model, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the utility model without making any inventive effort, are intended to fall within the scope of the utility model.

In the description of the present utility model, unless explicitly stated or limited otherwise, the terms "connected," "secured" and "fixed" are to be construed broadly, as for example, they may be fixedly connected, detachably connected, or integrally formed, mechanically connected, electrically connected, directly connected, indirectly connected through intermediaries, or in communication between two elements or in interaction relationship 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.

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

The fan coil is used as an indispensable terminal device in a central air conditioning system, has wide application range and covers various places such as office buildings, hotels, large public buildings such as markets, home residences and the like. The core function of the indoor air-cooling device is to cool or heat indoor air through the heat exchange process of circulating air and a refrigerant or a heating medium, so that the comfort level of the indoor environment is maintained. In fan coil's overall structure, the return air case plays the vital role, and it is responsible for guiding indoor air to coil area effectively and carries out heat exchange treatment to send back indoor with the air after the processing again, form a complete air circulation system, this design has not only ensured the continuous circulation and the renewal of indoor air, has still effectively promoted air conditioning system's overall energy efficiency.

However, in the design of the traditional air return box, the air return box generally adopts a fully-enclosed structural form, and only the air return opening and the air outlet are formed in the air return box. Especially, when the inside maintenance of returning air box is carried out, even when changing its internal components, the design of full package formula return air box often leads to the back panel to closely laminate with wall body or other structures, and the operating space who remains for the operator is very limited, and the operator often need dismantle the back panel of returning air box just can touch and carry out relevant operation, and this operation is complicated not only to, in the dismantlement process, the operator still probably need with the help of special instrument or take destructive means, this has not only increased cost of maintenance and time, still probably cause the harm to the overall structure of returning air box. More seriously, in some extreme cases, the rear panel cannot be removed due to space restrictions, and an operator may have to forego replacement of the failed parts, thereby seriously affecting the normal operation of the air conditioning system and the comfort of the indoor environment.

In addition, traditional return air box has still received the return air inlet structure restriction, leads to air to produce vortex and resistance in the flow in-process, when having reduced air circulation efficiency, also probably leads to the noise too big, has influenced user's comfort level.

In view of this, the present embodiment provides a return air box that is mainly applied to an air conditioning apparatus to perform an effect of guiding indoor air to a coil for heat exchange in the air conditioning apparatus. The back air box is provided with the clearance opening at the rear side of the box body, so that the rear side of the box body can provide enough operation space for operators, and the cooperation of the clearance opening and the back air opening also provides a larger air circulation path for the box body, thereby solving a series of technical problems of limited operation space of the back air box, overlarge noise and the like.

Referring to fig. 1 to 4 of the drawings, the bellows includes a housing body 10 having a rear side configured to allow mounting to a support body 20 (e.g., wall surface, bracket, etc.). The cabinet body 10 serves as a supporting body 20 of the return air box, in which a hollow return air chamber (not shown) is formed, and a core region through which air flows in the return air chamber should be provided to ensure smooth flow of air therein, reduce vortex and resistance, and improve air circulation efficiency.

On the basis, the upper side or the lower side of the case main body 10 is provided with the air return port 111, the air return port 111 is a main channel for air to enter the air return box, and the air return port 111 is arranged on the upper side or the lower side of the air return box, so that the outside air of the air return box can be ensured to smoothly enter the air return cavity, the air can be ensured to smoothly flow through the air return cavity, and the circulation and heat exchange of indoor air can be realized in an actual application scene.

It should be understood that, in a practical application scenario, the casing body 10 is further provided with an air outlet 121 connected to the air return cavity, the main function of the air outlet 121 is to supply air, which is generally located at one end of the casing body 10 away from the air return 111, and when the air conditioning system or the ventilation device is started, the treated air is delivered to the air outlet 121 through the air return cavity, and is uniformly blown to each corner of the room through the air outlet 121, so that the indoor temperature, humidity and air quality can be adjusted and improved.

Meanwhile, the rear side of the chassis body 10 is further provided with a side-avoiding opening 112 connected with the air return opening 111, the side-avoiding opening 112 is located on one side of the chassis body 10 and used for being installed on the supporting body 20, in an actual application scene (in the case that the chassis body 10 is installed on the supporting body 20), functions provided by a rear panel located on the rear side of the chassis body 10 (the air return cavity is enclosed and shielded by the chassis body 10) are borne by the supporting body 20, and the supporting body 20 (such as the tightness of a wall) is used as a part of the air return cavity, so that the supporting body 20 is actually incorporated into a closed system of the air return cavity by the design of the side-avoiding opening 112, and even if the rear panel is not provided, the air return cavity can maintain good tightness, and the efficiency and quality of air circulation are ensured.

Through adopting above-mentioned design, the existence of avoiding the position mouth 112 can provide the facility for operating personnel when overhauling maintenance or even the subassembly is changed to the return air incasement portion, more spacious operating space has been provided for the maintenance personnel, the space restriction problem that faces when the operation of having effectively solved full package formula return air case in the correlation, operating personnel can be relaxed and carry out the correlation operation to the return air intracavity portion through the space that keeps away the position mouth 112 and return air mouth 111 provided, the in-process need not to dismantle complicated panel or structure, the maintenance dilemma that leads to because of the unable dismantlement of rear panel has been avoided, thereby operation flow has been simplified greatly, maintenance time has been saved and the operation degree of difficulty has been reduced.

It is worth mentioning that the design that keeps away position mouth 112 links to each other with return air inlet 111 for operating personnel can possess bigger operation field of vision when overhauling and maintaining, compares the scheme that keeps away position mouth 112 and return air inlet 111 interval set up, and this embodiment not only helps operating personnel to fix a position operating position fast, can also improve the accuracy and the efficiency of relevant operation. And during the related operation, the larger operation space also allows operators to enter the return air cavity in various postures and angles, even more different types of operation tools, so that various complicated operation scenes can be flexibly dealt with, and the comfort and the safety of the related operation are improved.

The return air box of this embodiment also includes fan assembly 13, and fan assembly 13 specifically sets up in the middle of the return air chamber, and fan assembly 13 passes through inside drive arrangement drive flabellum and rotates to produce the air current, thereby form the negative pressure in the return air chamber, attract indoor air to get into the return air chamber through return air inlet 111, and be discharged from air outlet 121 under fan assembly 13's effect, this process has realized the circulation and the heat exchange of indoor air.

In the above embodiment, since the case body 10 is provided with the relationship between the connected air return port 111 and the avoidance port 112, the rear side of the air return box has a semi-open structure, and in a specific application scenario, even if the support body 20 still exists on the rear side of the case body 10, the cooperation between the air return port 111 and the avoidance port 112 can form a larger air return space between the fan assembly 13 and the support body 20. The return air space is favorable for the air flow to flow more smoothly through the return air inlet 111 and the avoidance port 112 in the return air cavity, so that the turbulence and vortex generated by the air flow in the original narrow return air channel are reduced, the air circulation efficiency is improved, the indoor temperature regulation speed is accelerated, and the overall energy efficiency of the air conditioning system is improved. Meanwhile, the air flow is not excessively blocked and extruded when passing through the air return box, and the impact angle and the impact force between the air flow and the box wall of the supporting main body 20 and the box wall of the box main body 10 are correspondingly changed when passing through the air return cavity, so that noise generated by air flow impact can be reduced under certain conditions, noise generated in the operation process of the air return box is reduced, the hearing in the use process is effectively improved, and the use experience of a user is improved.

For easier understanding of the present embodiment, the airflow direction of the casing body 10 is defined as the length direction, and referring to fig. 4 of the specification, the air return opening 111 and the air outlet 121 are disposed to extend along the width direction of the casing body 10.

In a further embodiment, the width of the air inlet on the case body 10 is substantially identical to the width of the case body 10, so as to increase the area of the air return opening 111 as much as possible, thereby making it more effective to capture the air flow from all directions in the room, which is helpful to increase the air return volume and improve the air circulation efficiency of the whole air conditioning system. Meanwhile, the air return opening 111 extending along the width direction of the chassis main body 10 can capture the indoor air in a larger range, so that the indoor air can enter the air return cavity more uniformly, turbulence and vortex phenomena of the air flow in the chassis main body 10 are reduced, and the indoor air circulation is ensured to be more stable and efficient.

Further, the dimension of the avoidance port 112 along the width direction of the chassis main body 10 is consistent with that of the return air port 111, and the avoidance port 112 and the return air port 111 are the same in width on the basis of connection, which means that when an operator performs related operation on the interior of the chassis main body 10 through the avoidance port 112, the return air port 111 can be further utilized to obtain a larger operation view and space, which is helpful for the operator to more easily approach the fan assembly 13 and other key components and perform necessary overhaul, maintenance and replacement work, thereby saving maintenance time, reducing maintenance cost and improving the operation efficiency of the whole air conditioning system.

Besides, the design of the same width of the avoidance port 112 and the return port 111 can also reduce the processing difficulty of the chassis main body 10, in the process of processing and forming the chassis main body 10 by adopting different processing technologies, the return port 111 and the avoidance port 112 which are positioned on the chassis main body 10 and connected and have the same width can be processed and formed in the same procedure, and the two openings can be processed by using the same or similar tools and dies, so that the production flow is simplified, the manufacturing cost is reduced, the production efficiency is improved, and the processing precision of the chassis main body 10 is also improved.

In an embodiment, please continue to refer to fig. 1-4 of the specification, on the basis of opening the air return opening 111 and the avoidance opening 112 on the chassis main body 10, the fan assembly 13 is disposed at one end of the air return cavity close to the air return opening 111 and the avoidance opening 112, and the fan assembly 13 is at least partially exposed outside the chassis main body 10 through the air return opening 111 and the avoidance opening 112, so that an operator can more conveniently approach the fan assembly 13 to perform necessary maintenance, cleaning or replacement work, and the operation efficiency of the operator is effectively improved.

It should be noted that the above design can reduce the difficulty of the related operation of the blower assembly 13 when the operator only performs the related operation on the blower assembly 13, and also helps to reduce the damage or error that may occur to the operator during the disassembly and reinstallation process when the related operation of the blower assembly 13 is required, thereby enhancing the reliability and service life of the system.

In addition, the fan assembly 13 is partially exposed to the outside of the cabinet body 10 through the return air port 111 and the escape port 112, and the air (indoor air) of the fan assembly 13 acting on the outside of the cabinet body 10 is also facilitated, thereby increasing the air circulation efficiency of the air conditioning system.

As a specific embodiment, the fan assembly 13 includes a motor 131 and an impeller 132, wherein a fixed end (such as a housing and a stator installed in the housing) of the motor 131 is fixedly installed on the casing body 10, and the impeller 132 is in driving connection with an output end (a rotor, which may also be regarded as an output shaft 1311) of the motor 131. In a specific application scenario, the impeller 132 is at least partially exposed from the air return opening 111 and the avoidance opening 112 to the outside of the case body 10, so as to ensure that the impeller 132 can efficiently suck indoor air under the condition of being driven by the motor 131, and optimize air flow distribution.

With continued reference to fig. 2 and fig. 4 of the disclosure, as an alternative embodiment of the foregoing solution, two opposite ends of the motor 131 are respectively provided with an output shaft 1311 that rotates synchronously, and correspondingly, two impellers 132 are correspondingly provided, and the two impellers 132 are respectively coaxially connected with the output shafts 1311 at two ends of the motor 131. The output shafts 1311 at opposite ends of the motor 131 are arranged to be capable of synchronous rotation, thereby ensuring that the two impellers 132 can rotate at the same speed at the same time, helping to balance the air flow and improving the stability and efficiency of the system.

Moreover, the two impellers 132 are arranged in the air return cavity along the width direction of the case body 10 at intervals, on the basis that the air return opening 111 extends along the width direction of the case body 10, the arrangement mode of the two impellers is matched with the opening direction of the air return opening 111 and the opening direction of the position avoiding opening 112, so that the influence of the fan assembly 13 on indoor air can be further enlarged, the conversion efficiency of wind energy is maximized, the impellers 132 can more effectively suck and discharge the indoor air in the rotating process, and the air flow distribution in the indoor air and the air return cavity is further optimized, and the air circulation efficiency is improved.

The two impellers 132 are arranged at intervals along the width direction of the case body 10, so that the technical effects of improving ventilation efficiency, enhancing wind power output and the like can be achieved, when the arrangement mode of the impellers 132 is matched with the opening directions of the air return opening 111 and the avoidance opening 112, the two impellers 132 are in a state that the impellers can be directly operated by operators, and therefore the fans 13 are easier to be operated by the operators, the operators can finish the tasks of overhauling and maintaining more quickly, and the operation efficiency is improved.

In an alternative embodiment, the chassis body 10 adopts a modularized design concept, and as shown in fig. 1 to 4, the chassis body 10 includes a first case 11 and a second case 12. Wherein, first box 11 is used for providing fan assembly 13's installation space, has seted up return air inlet 111 and keeps away a mouthful 112 on the first box 11, and second box 12 installs in the one end that return air inlet 111 and keeps away a mouthful 112 are kept away from to first box 11, and second box 12 inside is linked together with first box 11 inside in order to form the return air chamber, and second box 12 is kept away from the air outlet 121 in intercommunication return air chamber has been seted up to first box 11's one end, and the inside of second box 12 is used for providing coil assembly 14's installation space.

It should be explained here that the coil assembly 14 is a core of an air conditioning apparatus for transferring a cold (heat) amount of a cold (heat) medium to air passing through the coil assembly 14, and performing heat exchange between the cold (heat) medium (e.g., water) in the coil assembly 14 and air outside the coil assembly 14, thereby achieving an indoor temperature adjustment. Generally, the coil assembly 14 is mainly composed of a copper tube and an aluminum foil, the copper tube is used for providing a flowing space of a cooling (heating) medium, and the aluminum foil is arranged on each part of the copper tube on the basis of a coiled copper tube structure, so that the heat exchange area of the cooling (heating) medium and the external environment is increased, and the heat exchange efficiency is improved.

In the above embodiment, the case main body 10 adopts the modularized design concept, and in some special overhaul and maintenance scenarios, an operator can disassemble the first case 11 and the second case 12, so as to achieve the purposes of further reducing the equipment maintenance difficulty and improving the maintenance efficiency, and when a certain case fails, the first case 11 and the second case 12 can be independently replaced and upgraded, thereby greatly reducing the maintenance cost and being beneficial to promoting the product upgrade. Besides, by splitting the case main body 10 into two independent modules of the first case 11 and the second case 12, the first case 11 and the second case 12 can be designed and manufactured respectively, and under the condition that the first case 11 and the second case 12 provide different functions respectively, the two structures are necessarily different, and the independent processing of the first case 11 and the second case 12 is also beneficial to simplifying the whole processing flow of the equipment, and the first case 11 and the second case 12 can be processed simultaneously on different production lines or work stations respectively, so that the production period is greatly shortened, and the production efficiency is improved.

As a specific structural form of the first box 11, please refer to fig. 1-4 of the specification, a top plate 113 is provided at the top of the first box 11, a first plate edge 1132 is formed at one end of the top plate 113 far away from the second box 12, side plates 114 are respectively provided at opposite sides of the top plate 113 in the width direction, a second plate edge 1141 inclined from top to bottom in a direction far away from the second box 12 toward the second box 12 is formed at one side of the side plates 114 far away from the second box 12, bottoms of the side plates 114 are connected by a bottom plate 115, a third plate edge 1151 is formed at one side of the bottom plate 115 far away from the second box 12, and on this basis, the first plate edge 1132, the second plate edge 1141 and the third plate edge 1151 are connected and enclosed to form the air return port 111 and the position avoiding port 112. The key point of this embodiment is that, on the side of the side plate 114 away from the second box 12, a second plate edge 1141 is formed, which is inclined from top to bottom in the direction away from the second box 12 toward the second box 12, and because the first plate edge 1132 and the third plate edge 1151 are respectively connected to the second plate edge 1141 and the second plate edge 1141 is in an inclined structure, the dimensions of the top plate 113 and the bottom plate 115 in the length direction of the casing main body 10 are not consistent, so that the air return opening 111 and the avoiding opening 112 form an integrally downwardly inclined opening structure under the condition that the shielding of the supporting main body 20 is lost, and meanwhile, the two side plates 114 do not block the related components in the air return cavity, especially in the embodiment that the fan assembly 13 is arranged to be at least partially exposed to the casing main body 10 through the air return opening 111 and the avoiding opening 112, the inclined second plate edge 1141 can also enable the impeller 132 to be better exposed to the outside, thereby provide a more wide operating space for an operator, and simultaneously enable the fan assembly 13 to better act in the indoor space, and enhance the air circulation efficiency of the air conditioning system.

Based on the above embodiment, in other embodiments, the first housing 11 further includes a back plate 116, where the back plate 116 is located on a side of the first housing 11 near the second housing 12, and is used to connect the top plate 113, the side plate 114 and the bottom plate 115, so as to enhance the overall structural strength of the first housing 11, and provide a sufficient installation position for installing the second housing 12 on the first housing 11. However, it should be noted that, in order to ensure that the internal spaces of the first casing 11 and the second casing 12 can be mutually communicated, the back plate 116 needs to be provided with openings penetrating through two opposite sides thereof, and the two sides of the openings are respectively communicated with the internal spaces of the first casing 11 and the second casing 12, so that air can smoothly flow from the first casing 11 into the second casing 12.

In addition, an end of the top plate 113 away from the second case 12 is further provided with a mounting plate 1131 turned downward, and an end of the mounting plate 1131 away from the first case 11 forms a first plate edge 1132. The flanging design of the top plate 113 can effectively enhance the overall structural strength of the first box 11, and the top of the first box 11 is additionally supported, so that the first box 11 can resist the pressure and the load from related components and the second box 12 in the first box 11 in the state of being mounted on the supporting main body 20, and the stability and the durability of the bellows in the mounting state are improved.

At the same time, the mounting plate 1131 also provides a stable support mounting position for the first housing 11 when mounted to the support body 20, so that the bellows can be more easily docked and fixed with the support body 20.

The present embodiment also provides an air conditioning indoor unit, for example, a wall-mounted air conditioner, where the air conditioning indoor unit adopts the return air box according to any one of the above embodiments, and on this basis, a coil assembly 14 is further disposed in the return air box. Through installing the rear side of return air box on corresponding support main part 20 (such as wall, furred ceiling etc.), make support main part 20 can block to keep away position mouth 112 to form return air inlet 111 with the downside cooperation of machine case main part 10, in the operation in-process of fan subassembly 13, indoor air can enter into the return air chamber through return air inlet 111, and flow in the return air intracavity from return air inlet 111 to air outlet 121 direction, can pass through coil assembly 14 during the air flow and carry out the heat exchange with coil assembly 14, finally, after the air is outside through air outlet 121 discharge machine case main part 10, reach the purpose of adjusting indoor temperature.

After the case body 10 is detached from the corresponding support body 20, the shielding of the support body 20 is lost by the position-avoiding opening 112, so that the operation space provided by the rear side of the case body 10 can be further enlarged by matching with the position-avoiding opening 112 on the basis of the return air opening 111, and the purpose of facilitating subsequent overhaul and maintenance operations of operators is achieved.

Based on the foregoing, the present embodiment also provides an air conditioning system including the air conditioning indoor unit according to the above embodiment. Besides the air conditioning indoor unit, the air conditioning system further comprises an outdoor unit, a refrigerant pipeline, a control system and other necessary components, the air conditioning indoor unit is used as one of core components of the air conditioning system, and the structure and the functions of the air conditioning indoor unit are described in detail in the above embodiments, so that the air conditioning indoor unit is not further described, and by the design and the optimization of the air return box, the air conditioning indoor unit can provide enough operation space for operators, so that the difficulty of related operations such as overhauling and maintenance of the operators is reduced. The outdoor unit is generally installed in an outdoor space and used for providing a cold source or a heat source required by an air conditioning system, and when the air conditioning system is in operation, the outdoor unit is communicated with the air conditioning indoor unit through a refrigerant pipeline, and the cold (heat) medium is circulated between the outdoor unit and the air conditioning indoor unit, so that the refrigerating or heating function is realized.

In the description herein, it should be understood that the terms "upper," "lower," "left," "right," and the like are merely for convenience of description and to simplify the operation, and do not indicate or imply that the devices or elements referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus should not be construed as limiting the utility model. Furthermore, the terms "first," "second," and the like, are used merely for distinguishing between descriptions and not for providing a special meaning.

In the description herein, reference to the term "one embodiment," "an example," etc., means that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the utility model. In this specification, schematic representations of the above terms do not necessarily refer to the same embodiments or examples.

Furthermore, it should be understood that although the present disclosure describes embodiments, not every embodiment is provided with a separate embodiment, and that this description is provided for clarity only, and that the disclosure is not limited to the embodiments described in the foregoing embodiments, and that the embodiments described in the foregoing embodiments may be combined appropriately to form other embodiments that will be understood by those skilled in the art.

The technical principle of the present utility model is described above in connection with the specific embodiments. The description is made for the purpose of illustrating the general principles of the utility model and should not be taken in any way as limiting the scope of the utility model. Other embodiments of the utility model will be apparent to those skilled in the art from consideration of this specification without undue burden.

Claims (10)

1. A return air box, comprising:

The back side of the case body (10) is configured to be allowed to be mounted on the supporting body (20), a hollow return air cavity is formed in the case body (10), a return air inlet (111) communicated with the return air cavity is formed in the upper side or the lower side of the case body (10), and a avoidance port (112) connected with the return air inlet (111) is formed in the back side of the case body (10);

And the fan assembly (13) is arranged in the return air cavity.

2. The return air box according to claim 1, wherein the return air inlet (111) is provided extending in the width direction of the casing main body (10).

3. The return air box according to claim 2, wherein the dimension of the clearance opening (112) in the width direction of the cabinet main body (10) is identical to the return air opening (111).

4. A return air box according to any one of claims 1-3, characterized in that the fan assembly (13) is arranged at one end of the return air cavity near the return air inlet (111) and the avoidance port (112), and the fan assembly (13) is at least partially exposed to the outside of the case main body (10) through the return air inlet (111) and the avoidance port (112);

the fan assembly (13) comprises:

An electric motor (131)

And an impeller (132) in driving connection with the motor (131).

5. The bellows according to claim 4, characterized in that the opposite ends of the motor (131) are provided with output shafts (1311) rotating synchronously, respectively;

The number of the impellers (132) is two, the two impellers (132) are respectively and coaxially connected with two output shafts (1311) of the motor (131), and the two impellers (132) are arranged in the return air cavity at intervals along the width direction of the case main body (10).

6. The bellows as set forth in claim 1, wherein the housing main body (10) includes:

A first box body (11) for providing the installation space of the fan assembly (13), wherein the first box body (11) is provided with the return air inlet (111) and the avoidance port (112), and

The second box (12) install in first box (11) keep away from return air inlet (111) and keep away the one end of position mouth (112), second box (12) inside with first box (11) are inside to be linked together in order to form return air chamber, second box (12) keep away from the one end of first box (11) has been seted up intercommunication return air chamber's air outlet (121), the inside of second box (12) is used for providing the installation space in coil pipe subassembly (14).

7. The back air box according to claim 6, characterized in that a top plate (113) is arranged at the top of the first box body (11), and a first plate edge (1132) is formed at one end of the top plate (113) far away from the second box body (12);

The top plate (113) is respectively provided with side plates (114) at two opposite sides in the width direction, and a second plate edge (1141) inclined from top to bottom in the direction away from the second box (12) to the direction close to the second box (12) is formed on one side of the side plates (114) away from the second box (12);

The bottoms of the two side plates (114) are connected through a bottom plate (115), and a third plate edge (1151) is formed on one side, away from the second box body (12), of the bottom plate (115);

the first plate edge (1132), the second plate edge (1141) and the third plate edge (1151) are connected and enclosed to form the return air inlet (111) and the avoidance opening (112).

8. The back air box according to claim 7, characterized in that one end of the top plate (113) far away from the second box body (12) is further provided with a mounting plate (1131) turned downwards, and one end of the mounting plate (1131) far away from the first box body (11) forms the first plate edge (1132).

9. An air conditioning indoor unit comprising a return air box according to any one of claims 1 to 8.

10. An air conditioning system comprising the air conditioning indoor unit of claim 9.