WO2021227880A1 - Cabinet air conditioner indoor unit - Google Patents

Abstract

A cabinet air conditioner indoor unit, comprising: a housing, wherein a through channel which runs through the housing in a front-back direction, a first heat exchange air channel and a second heat exchange air channel are formed inside the housing, the first heat exchange air channel and the second heat exchange air channel are each provided with a heat exchange airflow outlet, and the first heat exchange air channel and the second heat exchange air channel are each provided with a heat exchanger and a fan therein; a fresh air jet flow air channel, which is arranged inside the through channel and is independent of the first heat exchange air channel and the second heat exchange air channel; and a fresh air pipe, wherein one end of the fresh air pipe is in direct or indirect communication with the fresh air jet flow air channel, and the other end of the fresh air pipe extends out of the housing, such that the fresh air jet flow air channel is in communication with the outdoor environment by means of the fresh air pipe, and outdoor fresh air is allowed to flow out through the fresh air pipe and the fresh air jet flow air channel in sequence and is then mixed with a heat exchange air flow sent out through the first heat exchange air channel and the second heat exchange air channel. Therefore, the comfort of a user can be improved in two aspects, i.e. the temperature of the output air and the freshness of the air.

Description

Cabinet type air conditioner indoor unit Technical field

The invention relates to air conditioning technology, in particular to a cabinet type air conditioner indoor unit.

Background technique

With the continuous improvement of people's living standards, users not only have temperature requirements for the indoor space environment, but also have other requirements such as freshness and cleanliness. However, these functions are basically realized by different household appliances. For example, people usually use an air conditioner to adjust the temperature of an indoor space. In order to improve the user's comfort in using air conditioners, some cabinet-type air conditioner indoor units on the market have an air induction function, which is used to introduce natural air without heat exchange in the room, mix it with the air flow after heat exchange, and send it indoors. However, even this cannot meet the user's requirements for comfort experience, because both the introduced natural air and the airflow after heat exchange are indoor air, and only the circulation of indoor air is realized. When the air conditioner is used for a long time in a confined space, problems such as stuffiness, peculiar smell, and stale air will affect the user's comfort experience.

Summary of the invention

An object of the present invention is to overcome at least one technical defect of the prior art and provide a cabinet air conditioner indoor unit with soft air supply and capable of keeping the indoor air fresh for a long time, so as to meet the user's multiple comfort experience requirements.

A further object of the present invention is to increase the air supply volume of the cabinet-type air conditioner indoor unit.

Another further object of the present invention is to improve the convenience of transportation and installation of the cabinet-type air conditioner indoor unit.

In order to achieve the above objective, the present invention provides a cabinet type air conditioner indoor unit, which includes:

A casing, the inside of the casing is formed with a through passage that penetrates the casing back and forth, and a first heat exchange air duct and a second heat exchange air duct which are located on both lateral sides of the through passage and are independent of each other, so The first heat exchange air duct and the second heat exchange air duct both have heat exchange airflow outlets, and the first heat exchange air duct and the second heat exchange air duct are both provided with heat exchangers and fans, So as to promote the heat exchange airflow in the first heat exchange air duct and the second heat exchange air duct to be sent out through its own heat exchange airflow outlet by the fan;

The fresh air jet air duct is provided in the through channel independently of the first heat exchange air duct and the second heat exchange air duct; and

A fresh air duct, one end of which is directly or indirectly connected with the fresh air jet duct, and the other end extends to the outside of the cabinet, so that the fresh air jet duct is connected to the outdoor environment through the fresh air duct, This allows outdoor fresh air to flow through the fresh air duct to the fresh air jet duct, and after flowing out through the fresh air jet duct, it exchanges with the air sent out through the first heat exchange air duct and the second heat exchange air duct. The hot air flows are mixed.

Optionally, at least one air induction channel is defined between the air duct wall of the fresh air jet air duct and the side wall of the through channel; and

The fresh air jet air duct is fixedly arranged in the through passage; or, the fresh air jet air duct is arranged to move in the through passage in a controlled manner or operably to open and close the at least one induced air Channel and/or adjust the flow area of the at least one draft channel.

Optionally, the cabinet-type air conditioner indoor unit further includes:

A fresh air fan, the air inlet of the fresh air fan is hermetically connected with the fresh air pipe so as to communicate with the outdoor environment through the fresh air pipe, and the air outlet of the fresh air fan communicates with the fresh air jet duct, The outdoor fresh air is driven by the fresh air fan to flow to the fresh air jet duct and sent out through the fresh air jet duct, so that the outdoor fresh air flowing out through the fresh air jet duct is different from that through the first changer. The hot air duct is mixed with the heat exchange air flow sent from the second heat exchange air duct.

Optionally, one end of the fresh air pipe is hermetically connected with the airflow inlet of the fresh air fan, and the other end is arranged to be operable to expand and contract along the radial direction of the fresh air pipe.

Optionally, the fresh air fan is a centrifugal fan arranged under the fresh air jet air duct to controlly drive outdoor fresh air to flow into the centrifugal fan horizontally through the fresh air pipe and flow from bottom to top. Into the fresh air jet air duct.

Optionally, the through passage penetrates the upper part of the casing in the front-to-rear direction; and

The fresh air fan is arranged in the lower part of the casing, and the fresh air pipe passes through the rear wall of the casing and is connected to the airflow inlet of the fresh air fan in a sealed manner.

Optionally, the heat exchange airflow outlets of the first heat exchange air duct and the second heat exchange air duct both face the front side of the casing, and a fresh air outlet is provided on the front side of the fresh air jet duct ;and

The fresh air jet air duct defines a vertically extending diversion cavity, and the inside of the fresh air jet air duct is symmetrically provided with two vertically extending arc-shaped deflectors, the two arc-shaped deflectors Protruding and bending from back to front in the direction of approaching each other, so that the front part of the diversion cavity adjacent to the fresh air outlet forms a tapered arc-shaped constriction.

Optionally, a plurality of guide vanes located inside the fresh air outlet are provided in the diversion cavity, and the plurality of guide vanes are arranged at intervals in the vertical direction; and

The length of the deflector in the front-rear direction is less than or equal to the depth of the arc-shaped deflector in the front-rear direction, so that the deflector is in the arc-shaped constriction.

Optionally, the heat exchange airflow outlets of the first heat exchange air duct and the second heat exchange air duct both face the front side of the casing, and a fresh air outlet is provided on the front side of the fresh air jet duct , The fresh air jet air duct defines a vertically extending diversion cavity, and the diversion cavity is provided with a plurality of guide vanes located inside the fresh air outlet, and the plurality of guide vanes are in the vertical direction. Spaced on top; and

The guide vane includes an arc section that curves and extends from back to front from bottom to top, and a straight section that extends forward from the end of the arc section to the fresh air outlet.

Optionally, the cabinet-type air conditioner indoor unit further includes:

The purification module is used to purify the outdoor fresh air flowing from the fresh air pipe to the fresh air jet duct.

The cabinet-type air conditioner indoor unit of the present invention is provided with fresh air jet ducts in the through passages passing through the cabinet at the front and rear of the cabinet, and in particular is provided with a fresh air duct connected with the fresh air jet duct, and the fresh air duct extends to the outside of the cabinet, In order to communicate with the outdoor environment. When the indoor unit of the cabinet-type air conditioner is running, negative pressure will be generated in the penetrating channel due to the heat exchange air flow from the outlet of the heat exchange airflow. Under the action of negative pressure, the outdoor fresh air will flow into the indoor unit of the cabinet-type air conditioner through the fresh air duct and flow through the fresh air jet. The air duct flows out to mix with the heat exchange air flow flowing out through the first heat exchange air duct and the second heat exchange air duct to form a softer mixed air, which prevents the air outlet of the cabinet-type air conditioner indoor unit from being too cold or overheating, and , In the air supply process of the cabinet-type air conditioner indoor unit, outdoor fresh air is continuously introduced into the room, so the user's comfort experience can be improved in both the air outlet temperature and air freshness.

Furthermore, the cabinet-type air conditioner indoor unit is also specially equipped with a fresh air fan for driving the outdoor fresh air to flow through the fresh air duct to the fresh air jet duct and sending it out through the jet duct. In other words, the fresh air fan can actively introduce outdoor fresh air into the cabinet. Compared with the traditional passive drainage method using negative pressure in the air supply path of the air conditioner indoor unit, the present invention provides a fresh air fan with active jet flow, which greatly increases the jet air volume and air supply distance, thereby improving the softness of the cabinet air conditioner indoor unit. The effect of air supply increases its overall air supply volume and expands its air supply range.

Further, in the present invention, one end of the fresh air pipe is set to be hermetically connected to the airflow inlet of the fresh air fan, and the other end of the fresh air pipe is set to be operable to expand and contract along the radial direction of the fresh air pipe. Before the indoor unit is installed, the fresh air duct can be retracted to avoid the cabinet air conditioner indoor unit occupying too much space or interference with other structures, which improves the convenience of handling or transportation of the cabinet air conditioner indoor unit; in the cabinet air conditioner room When the unit is installed, the fresh air duct can also be extended so that it can pass through the wall and communicate with the outdoor environment, which improves the convenience of installing the cabinet air conditioner indoor unit.

Based on the following detailed description of specific embodiments of the present invention in conjunction with the accompanying drawings, those skilled in the art will better understand the above and other objectives, advantages and features of the present invention.

Description of the drawings

Hereinafter, some specific embodiments of the present invention will be described in detail in an exemplary but not restrictive manner with reference to the accompanying drawings. The same reference numerals in the drawings indicate the same or similar components or parts. Those skilled in the art should understand that these drawings are not necessarily drawn to scale.

In the attached picture:

Fig. 1 is a schematic structural diagram of a cabinet type air conditioner indoor unit according to an embodiment of the present invention;

Fig. 2 is a schematic rear view of a cabinet type air conditioner indoor unit according to an embodiment of the present invention;

3 is a schematic structural exploded view of a cabinet type air conditioner indoor unit according to an embodiment of the present invention;

4 is a schematic cross-sectional view of the cabinet-type air conditioner indoor unit according to an embodiment of the present invention taken along a vertical cross-sectional plane extending in the front-to-rear direction;

Fig. 5 is a schematic cross-sectional view of a cabinet-type air conditioner indoor unit according to an embodiment of the present invention taken along a horizontal cross-sectional plane;

6 and 7 are schematic cross-sectional views taken along a horizontal cross-sectional plane of the cabinet-type air conditioner indoor unit in different states according to another embodiment of the present invention;

Figure 8 is a schematic structural cross-sectional view of a fresh air jet duct according to an embodiment of the present invention, taken from a vertical cross-sectional plane extending in the front-to-rear direction;

FIG. 9 is a schematic enlarged view of part C in FIG. 8;

Fig. 10 is a schematic cross-sectional view of a fresh air jet duct according to an embodiment of the present invention taken along a horizontal cross-sectional plane.

Detailed ways

The present invention provides a cabinet type air conditioner indoor unit. FIG. 1 is a schematic structural diagram of a cabinet type air conditioner indoor unit according to an embodiment of the present invention, and FIG. 2 is a schematic diagram of a cabinet type air conditioner indoor unit according to an embodiment of the present invention. Rear view, FIG. 3 is a schematic structural exploded view of a cabinet type air conditioner indoor unit according to an embodiment of the present invention, and FIG. 4 is a vertical cross-sectional view of a cabinet type air conditioner indoor unit according to an embodiment of the present invention, which extends in the front-to-rear direction Figure 5 is a schematic cross-sectional view of the cabinet-type air conditioner indoor unit according to an embodiment of the present invention, taken along a horizontal cross-sectional plane.

1 to 5, the cabinet-type air conditioner indoor unit 1 of the present invention includes a cabinet 40. The cabinet 40 is formed with a through passage 41 that penetrates the cabinet 40 front and rear, and are located on both lateral sides of the through passage 41 and are independent of each other. The first heat exchange air duct 42 and the second heat exchange air duct 43, the first heat exchange air duct 42 and the second heat exchange air duct 43 both have heat exchange air outlets, and the first heat exchange air duct 42 and the second heat exchange air duct The heat exchange air duct 43 is equipped with a heat exchanger and a fan to promote the heat exchange airflow in the first heat exchange air duct 42 and the second heat exchange air duct 43 to be sent out through their own heat exchange airflow outlets through the fans. Specifically, two separate volute tongue assemblies 46 may be provided inside the casing 40 to jointly define a first heat exchange air duct 42 and a second heat exchange air duct 43 that are independent of each other with the casing 40. The air paths of the first heat exchange air duct 42 and the second heat exchange air duct 43 are independent of each other. The first heat exchange air duct 42 has a first heat exchange airflow outlet 421, and the first heat exchange air duct 42 is provided with a first The heat exchanger 51 and the first fan 61. The first heat exchanger 51 is used to exchange heat with the airflow in the first heat exchange air duct 42 to generate a heat exchange airflow. The first fan 61 is used to promote the heat exchange airflow It flows to the first heat exchange airflow outlet 421 and flows out through the first heat exchange airflow outlet 421. Similarly, the second heat exchange air duct 43 has a second heat exchange airflow outlet 431 in which a second heat exchanger 52 and a second fan 62 are provided. The second heat exchanger 52 is used to exchange heat with the airflow in the second heat exchange air duct 43 to generate a heat exchange airflow, and the second fan 62 is used to promote the heat exchange airflow to the second heat exchange airflow outlet 431, and It flows out through the second heat exchange air outlet 431.

In particular, the cabinet-type air conditioner indoor unit 1 further includes a fresh air jet duct 10 and a fresh air duct 70. The fresh air jet air duct 10 and the first heat exchange air duct 42 and the second heat exchange air duct 43 are independently arranged inside the through passage 41. In other words, the fresh air jet air duct 10 is independent of the first heat exchange air duct 42 and the second heat exchange air duct 43, and the air paths of the three air ducts are independent of each other and do not affect each other.

One end of the fresh air duct 70 is directly or indirectly connected to the fresh air jet duct 10, and the other end extends to the outside of the casing 40, so as to extend to the outdoor environment, so that the fresh air jet duct 10 communicates with the outdoor environment through the fresh air duct 70 , Thereby allowing the outdoor fresh air to flow through the fresh air duct 70 to the fresh air jet duct 10, and after flowing out through the fresh air jet duct 10, it is mixed with the heat exchange air flow sent out through the first heat exchange duct 42 and the second heat exchange duct 43 . When the cabinet-type air conditioner indoor unit 1 is operating, negative pressure will be generated in the penetrating channel 41 due to the heat exchange air flow from the outlet of the heat exchange air flow. Under the action of the negative pressure, the outdoor fresh air will flow into the fresh air jet duct 10 through the fresh air duct 70. It flows out through the fresh air jet duct 10, and thus mixes with the heat exchange airflow flowing out through the first heat exchange duct 42 and the second heat exchange duct 43 to form a relatively soft mixed air, which avoids the cabinet-type air conditioner indoor unit 1. The wind is too cold or too hot, and the outdoor fresh air is continuously introduced into the room during the air supply process of the cabinet-type air conditioner indoor unit 1, so the user's comfort experience can be improved in both the outlet temperature and air freshness. .

In some embodiments, the cabinet-type air conditioner indoor unit 1 further includes a fresh air fan 20, and the air inlet 21 of the fresh air fan 20 is hermetically connected with the fresh air duct 70 so as to communicate with the outdoor environment through the fresh air duct 70. The air outlet is connected with the fresh air jet duct 10 to controlly drive the outdoor fresh air to flow to the fresh air jet duct 10 through the fresh air fan 20 and send it out through the fresh air jet duct 10, so that the outdoor fresh air flowing out through the fresh air jet duct 10 It is mixed with the heat exchange air flow sent through the first heat exchange air passage 42 and the second heat exchange air passage 43. That is to say, the fresh air fan 20 can actively introduce outdoor fresh air into the fresh air jet duct 10 and encourage it to flow out through the fresh air jet duct 10. Compared with the traditional passive drainage method using negative pressure, the present invention adopts the installation of fresh air. The fan 20 actively jets, the jet air volume is greatly increased, the air supply distance is increased, the soft air supply effect of the cabinet-type air conditioner indoor unit 1 is improved, the overall air supply volume is increased, and the air supply range is enlarged.

In some embodiments, one end of the fresh air pipe 70 is hermetically connected with the air inlet 21 of the fresh air fan 20, and the other end is configured to be operatively telescopic in the radial direction of the fresh air pipe 70. Therefore, before the cabinet-type air conditioner indoor unit 1 is installed, the fresh air duct 70 can be retracted to prevent the cabinet-type air conditioner indoor unit 1 from occupying too much space or interference with other devices, thereby improving the handling of the cabinet-type air conditioner indoor unit 1. Or the convenience of transportation; when the cabinet-type air conditioner indoor unit 1 is installed, the fresh air duct 70 can also be extended so that it can pass through the wall and communicate with the outdoor environment, which improves the convenience of installation of the cabinet-type air conditioner indoor unit 1.

Specifically, an inlet grill 72 may be provided at the other end of the fresh air duct 70 to prevent large debris in the outdoor environment from entering the cabinet-type air conditioner indoor unit 1 through the air inlet duct 70. The fresh air duct 70 may include a plurality of sleeves nested inside and outside, each sleeve having a shape that is tapered along its radial direction, and the tapering directions of the plurality of sleeves are the same. Before the cabinet-type air conditioner indoor unit 1 is installed, a plurality of sleeves are tightly sleeved together, and an end of the plurality of sleeves with a larger size is adjacently arranged. When the cabinet-type air conditioner indoor unit 1 is installed, the multiple sleeves are pulled apart so that the multiple sleeves are connected in pairs. The fresh air pipe 70 may also be a hollow tube, plastic hose or other suitable pipe body.

In some embodiments, the cabinet-type air conditioner indoor unit 1 further includes a purification module 71 for purifying the outdoor fresh air flowing from the fresh air duct 70 to the fresh air jet duct 10. The purification module 71 may be arranged in the fresh air duct 71, for example, at a position where the fresh air duct 70 is adjacent to the fresh air fan 20, and the purification module 71 may also be arranged in the air flow path between the fresh air fan 20 and the fresh air jet duct 10. superior.

Specifically, the purification module 71 may include a filter unit and an adsorption unit. The filter unit is used to filter relatively large impurities in the outdoor fresh air, and the adsorption unit is used to remove harmful substances in the outdoor air intake. In addition, the purification module 71 may also include other units capable of purifying air.

In some embodiments, at least one air induction channel 44 is defined between the air channel wall of the fresh air jet air channel 10 and the side wall of the through channel 41. When the fans in the first heat exchange air duct 42 and the second heat exchange air duct 43 are in operation and/or when the fresh air fan 20 is in operation, a certain negative pressure will be generated at the front of the induction duct 44. Under the action of this negative pressure, the air in the space where the cabinet-type air conditioner indoor unit 1 is located flows into the air induction channel 44, and is sent out through the front opening of the air induction channel 44, and exchanges with the unheated air flowing out through the fresh air jet duct 10 The outdoor fresh air and the heat exchange air flow sent through the first heat exchange air duct 42 and the second heat exchange air duct 43 are mixed. As a result, the total amount of unheated air introduced by the cabinet-type air conditioner indoor unit 1 is increased, and the overall air supply volume thereof is increased.

Further, referring to FIG. 5, the fresh air jet air duct 10 may be fixedly arranged in the through channel 41. In other words, the flow area of the induced air passage 44 is not adjustable, and the cabinet-type air conditioner indoor unit 1 will introduce approximately the same amount of indoor natural air through the induced air passage 44 every time the cabinet-type air conditioner indoor unit 1 starts operation.

6 and 7 are schematic cross-sectional views taken along a horizontal cross-sectional plane of the cabinet-type air conditioner indoor unit in different states according to another embodiment of the present invention. In other embodiments, the fresh air jet duct 10 may be configured to move in the through passage 41 in a controlled or operative manner to open and close at least one air induction channel 44 and/or to adjust the passage of at least one air induction channel 44. Flow area. The state shown in FIG. 6 is a state where the air induction channel 44 is open, and the state shown in FIG. 7 is a state where the air induction channel 44 is closed. That is to say, by moving the fresh air jet duct 10, the distance between the air duct wall of the fresh air jet duct 10 and the side wall of the penetrating channel 41 can be adjusted, thereby opening and closing the air induction channel 44 or adjusting the size of the air induction channel 44 Therefore, a mechanism for specifically controlling the opening and closing of the air induction channel 44 or adjusting the size of the air induction channel 44 is omitted, and the structure of the cabinet-type air conditioner indoor unit 1 is simplified.

In some embodiments, the heat exchange air outlets of the first heat exchange air duct 42 and the second heat exchange air duct 43 both face the front side of the casing 40, and the fresh air jet duct 10 is provided with a fresh air outlet 12 on the front side. In other words, the three air ducts all send air toward the front side of the casing 40, so that the heat exchange air flow from the two heat exchange air ducts and the unheated outdoor fresh air flowing from the fresh air jet duct 10 The mixing is performed on the front side or front of the cabinet 40. In addition, the fresh air jet air duct 10 is arranged in the through channel 41 between the two heat exchange air ducts, so that the fresh air jet air duct 10 is between the two heat exchange air ducts, so that the fresh air jet air duct 10 is sent out The outdoor fresh air is located between the two heat exchange airflows, which makes the mixing between the outdoor fresh air and the heat exchange airflow more even. It should be noted that the front side of the casing 40 referred to in the present invention may include the front side of the casing 40 or the oblique front side of the casing 40, as long as the direction of the heat exchange airflow outlet has a forward direction component. What is necessary is just to be able to blow air toward the front side of the cabinet 40.

Further, the two lateral air duct walls 10f of the fresh air jet air duct 10 are respectively spaced apart from the two lateral side walls 41a of the through passage 41, so as to form an air guide duct 44 on the two lateral outer sides of the fresh air jet air duct 10 respectively. , To introduce indoor natural air from both lateral sides at the same time, so that the indoor natural air and the heat exchange airflow can be mixed more evenly. Those skilled in the art should understand that the natural air referred to in the present invention means air without heat exchange.

In some embodiments, the fresh air jet duct 10 is arranged in the rear section 411 of the through passage 41, and the fresh air jet duct 10 matches the shape of the rear section 411 of the through duct, so that the fresh air jet duct 10 The structural layout between and the through passage 41 is more compact to reduce the volume of the cabinet type air conditioner indoor unit 1. The cross section of the rear section 411 through the passage 41 and the cross section of the fresh air jet duct 10 are tapered from back to front, so as to form a diversion cavity 11 that is tapered from back to front in the fresh air jet duct 10, so that The outdoor fresh air flows forward quickly.

In some embodiments, such as the embodiment shown in FIGS. 6 and 7, the fresh air jet duct 10 is configured to move in a forward and backward direction in a controlled or operative manner so as to move forward to make its two transverse ducts When the wall 10f abuts against the two side walls 41a of the rear section 411 of the penetrating channel, the two air-inducing channels 44 are closed, and the two air duct walls 10f are moved backward so that the two transverse air channel walls 10f are respectively connected to the rear area of the penetrating channel. When there is a gap between the two side walls 41a of the segment 411, two air induction channels 44 are opened. Since the rear section 411 of the through passage 41 and the fresh air jet duct 10 are tapered from back to front, as the fresh air jet duct 10 moves backward, its two transverse air duct walls 10f and the through duct 10 The distance between the two side walls 41a of the rear section 411 becomes larger and larger, that is, the flow area of the air induction channel 44 becomes larger and larger. Conversely, as the fresh air jet air duct 10 moves forward, the distance between its two transverse air duct walls 10f and the two side walls 41a that penetrate the rear section 411 of the duct becomes smaller and smaller, that is, the air duct 44 The flow area is getting smaller and smaller. When the fresh air jet air duct 10 moves forward to a predetermined position, its two transverse air duct walls 10f abut the two side walls 41a penetrating the rear section 411 of the duct, and the air induction duct 44 is completely closed at this time. In this way, the flow area of the two air induction channels 44 can be adjusted by moving the fresh air jet air channel 10 back and forth, so as to adjust the amount of natural air introduced by the air induction channel 44.

In some embodiments, the cross section of the fresh air jet duct 10 is a trapezoid that tapers from back to front. When the fresh air jet duct 10 is movably arranged in the through passage 41, when the two induction ducts 44 are in a closed state, that is, the two transverse air duct walls 10f of the fresh air jet duct 10 and the rear section of the through passage When the two side walls 41a of the 411 abut, the rearward surface 10e of the fresh air jet duct 10 is flush with the rearward surface of the casing 40. When the cabinet-type air conditioner indoor unit 1 is in a shutdown state, the induced air passage 44 can be controlled to be in a closed state to prevent dust and debris from entering the cabinet 40. As a result, the completeness and appearance of the cabinet-type air conditioner indoor unit 1 can be improved. When the fresh air jet air duct 10 is fixedly arranged in the through passage 41, the rearward surface 10e of the fresh air jet duct 10 is flush with the rearward surface of the casing 40.

Further, the cross section of the fresh air jet duct 10 may be an isosceles trapezoid.

In some embodiments, the casing 40 is further provided with a first air inlet 451 and a second air inlet 452, and the first heat exchange air duct 42 and the second heat exchange air duct 43 are connected to the first air inlet 451 and the second air inlet respectively. The air inlet 452 is connected, so that the air outside the cabinet-type air conditioner indoor unit 1 is encouraged to flow into the first heat exchange air duct 42 through the first air inlet 451 through the first fan 61, and the air outside the cabinet-type air conditioner indoor unit 1 The air flows into the second heat exchange air duct 43 through the second air inlet 452.

Further, the through channel 41 may be formed in the middle of the casing 40, and the first air inlet 451 and the second air inlet 452 may be respectively located on both lateral sides of the casing 40 to avoid the first heat exchange air duct 42 and the second heat exchange duct. The inlet air of the hot air duct 43 interferes. The heat exchangers in the first heat exchange air duct 42 and the second heat exchange air duct 43, and the fans in the first heat exchange air duct 42 and the second heat exchange air duct 43 are all vertical to the casing 40 in the transverse direction. The straight planes m are symmetrically arranged, that is, the first heat exchanger 51 and the second heat exchanger 52 are arranged symmetrically, and the first fan 61 and the second fan 62 are arranged symmetrically. The two induced air passages 44 may also be symmetrically arranged with respect to the vertical bisecting plane m of the casing 40 in the transverse direction.

In some embodiments, the fans in the first heat exchange air duct 42 and the second heat exchange air duct 43 are cross-flow fans with a rotating shaft extending in a vertical direction. That is, both the first fan 61 and the second fan 62 are cross-flow fans extending vertically. Accordingly, the first air inlet 451, the second air inlet 452, the first heat exchange airflow outlet 421, and the second heat exchange The air outlet 431, the fresh air outlet 12, and the air supply outlet 453 are all elongated air outlets extending vertically. The fresh air jet air duct 10 is a long air duct extending in the vertical direction. As a result, the air outlet height of the cabinet-type air conditioner indoor unit 1 in the vertical direction can be increased, and the air supply range thereof can be enlarged. The first heat exchanger 51 and the second heat exchanger 52 are V-shaped or arc-shaped heat exchangers arranged laterally outside the first fan 61 and the second fan 62, respectively.

In some embodiments, the fresh air fan 20 is a centrifugal fan disposed under the fresh air jet duct 10 to controlly drive the outdoor fresh air to flow into the centrifugal fan horizontally through the fresh air pipe 70, and flow into the fresh air jet from bottom to top. Air duct 10.

The fresh air fan 20 of the present invention is selected as a centrifugal fan, and is placed below the fresh air jet duct 10, so as to reduce the size of the components formed by the fresh air fan 20 and the fresh air jet duct 10 in the lateral direction as much as possible, and increase its The height in the vertical direction, thus, the advantage of the height direction of the cabinet-type air conditioner indoor unit 1 can be fully utilized, so that the fresh air jet duct 10, the fresh air fan 20 and the cabinet 40 of the cabinet-type air conditioner indoor unit can be integrated The layout of the room is more compact, avoiding the use of cross-flow fresh air fans, and setting them in the fresh air jet ducts, causing the fresh air jet ducts to be too large in the horizontal direction, which leads to the excessive volume and occupation of the cabinet-type air conditioner indoor unit. The problem of excessive indoor space. At the same time, the air inlet area of the centrifugal fan is small, which is convenient for sealingly connecting with the fresh air pipe 70, which reduces the size and volume of the fresh air pipe 70.

In some embodiments, when the fresh air jet duct 10 is movable, the fresh air fan 20 may be fixedly arranged below the fresh air jet duct 10, and the fresh air jet duct 10 is configured to be controlled or operatively relative to the fresh air fan 20 moves. In other words, the fresh air fan 20 is not moving, and the fresh air jet duct 10 can move relative to the fresh air fan 20. At this time, the fresh air jet duct 10 and the fresh air fan 20 can be connected by a hose capable of generating recoverable elastic deformation. The arrangement of the hose can allow relative displacement between the fresh air jet duct 10 and the fresh air fan 20, and It can ensure a fluid communication relationship with good sealing performance between the fresh air jet duct 10 and the fresh air fan 20. In these embodiments, the cabinet-type air conditioner indoor unit 1 further includes a driving device for driving the fresh air jet duct 10 to move. The driving device may be any available driving device, which will not be repeated here.

In other embodiments, when the fresh air jet duct 10 is movable, the fresh air fan 20 can also be directly or indirectly fixedly connected with the fresh air jet duct 10, and the fresh air jet duct 10 is controlled or operably connected to the fresh air fan. 20 move together. In other words, the fresh air fan 20 and the fresh air jet duct 10 cannot produce relative displacement, but they can move together. This method does not have special requirements for the connection between the fresh air jet duct 10 and the fresh air fan 20, as long as the fluid communication relationship between the two can be ensured with better sealing. In these embodiments, the cabinet-type air conditioner indoor unit 1 further includes a driving device for driving the fresh air jet duct 10 and the fresh air fan 20 to move synchronously. The driving device may be any existing feasible driving device, which will not be repeated here.

The air supply outlet 453 of the indoor unit of the cabinet type air conditioner is usually a strip-shaped air supply outlet extending in the vertical direction. The fresh air outlets 12 on the front side of the duct 10 are all strip-shaped air outlets extending in the vertical direction to increase the air outlet height of the cabinet-type air conditioner indoor unit 1 in the vertical direction and expand its air supply range.

However, the fresh air fan 20 is located below the fresh air jet duct 10, and the air flows into the air outlet duct 20 from bottom to top, and is perpendicular to the direction of the fresh air outlet 12, so how to ensure that the fresh air outlet 12 delivers a higher flow rate Airflow and how to achieve uniform air discharge from the fresh air outlet 12 in the vertical direction are the design difficulties and design focus of further embodiments of the present invention.

8 is a schematic structural cross-sectional view of a vertical section of the fresh air jet duct extending in the front-to-rear direction according to an embodiment of the present invention, FIG. 9 is a schematic enlarged view of part C in FIG. 8, and FIG. 10 is according to the present invention A schematic cross-sectional view of the fresh air jet duct of an embodiment taken along a horizontal cross-sectional plane. Referring to Figures 8 to 10, in some embodiments, the fresh air jet duct 10 defines a vertically extending diversion cavity 11, and the airflow entering the fresh air jet duct 10 flows through the diversion cavity 11 from the fresh air jet The fresh air outlet 12 of the air duct 10 flows out. The fresh air jet duct 10 is symmetrically provided with two arc-shaped deflectors 13 extending vertically, and the two arc-shaped deflectors 13 protrude and bend toward each other from back to front, so as to divert the air. The cavity 11 is adjacent to the front of the strip-shaped fresh air outlet 12 to form a tapered arc-shaped constriction 111. In other words, the arc-shaped constricted portion 111 tapers from back to front, and is generally in the shape of a funnel from back to front. The tapered arc-shaped constriction formed by the baffle of this shape can reduce the air flow resistance as much as possible and increase the air flow velocity to the fresh air outlet 12, thereby increasing the air outlet speed of the jet device 1 and extending its air supply. distance.

In some embodiments, the cross section of the fresh air jet duct 10 is trapezoidal, the upper bottom of the trapezoid is located on the front side where the strip-shaped fresh air outlet 12 is located, and the bottom bottom of the trapezoid is located on the back side away from the strip-shaped fresh air outlet 12 . The rear ends of the two arc-shaped baffles 13 are respectively bent and extended forward by the two side plates of the fresh air jet duct 10 corresponding to the two waists of the trapezoid. Specifically, the fresh air jet duct 10 has a front side plate 10a, a rear side plate 10b, and two lateral side plates 10c. The outer surface of the rear side plate 10b forms the rear surface 10e of the fresh air jet duct 10, and the outer surface of the lateral side plate 10c forms the transverse air duct wall 10f of the fresh air jet duct 10. The fresh air outlet 12 is opened on the front side panel 10a, the cross section of the front side panel 10a is a trapezoidal upper bottom, the cross section of the rear side panel 10b is a trapezoidal lower bottom, and the cross section of the two transverse side panels 10c is trapezoidal. Two waists. The two arc-shaped baffles 13 are respectively curved and extended forward from the inner surfaces of the two lateral side plates 10c. In other words, the rear ends of the two arc-shaped baffles 13 do not extend to the rearmost side of the fresh air jet duct 10. The diversion cavity 11 thus formed includes two parts, an arc-shaped constriction 111 at the front and a ladder-like cavity 112 at the rear. The boundary line between the ladder-like cavity 112 and the arc-shaped constriction 111 is shown as a dotted line in Fig. 10 As shown in the line.

The ladder-like cavity 112 not only has a shape that is tapered from back to front to facilitate the acceleration of the air flow to the arc-shaped constriction 111, and the back side of the ladder-like cavity 112 also has a larger area for entering the fresh air jet duct 10 The air flows from bottom to top through the rear side of the ladder cavity 112, which reduces the flow resistance of the air flow and facilitates the formation of a more uniform air supply at the fresh air outlet 12.

In some embodiments, the arc-shaped narrowing portion 111 extends forward to the strip-shaped fresh air outlet 12, and the lateral dimension of the foremost end of the arc-shaped narrowing portion 111 is the same as the lateral dimension of the fresh air outlet 12. In other words, the foremost end of the arc-shaped constricted portion 111 is seamlessly butted with the fresh air outlet 12, so that turbulence near the fresh air outlet 12 can be avoided.

In some embodiments, the cross section of the diversion cavity 11 has a tapered shape in a direction from back to front. Specifically, the cross section of the diversion cavity 11 may have a regular tapered shape in the front-to-rear direction, or may have an irregular tapered shape. For example, the diversion cavity 11 shown in FIG. 10 has a ladder-like cavity 112 and an arc-shaped constriction 111 arranged from back to front, and both the ladder-like cavity 112 and the arc-shaped constriction 111 are tapered from back to front. The diversion cavity 11 thus formed has an irregularly tapered shape from back to front.

_{Further, the width W 4} of the rearmost end of the diversion cavity 11 in the lateral direction is 5-10 times _{the width W 6} of the fresh air outlet 12 in the lateral direction. Since the diversion cavity 11 is tapered from back to front, and the arc-shaped closing portion 111 is seamlessly butted with the fresh air outlet 12, the width of the rear end of the diversion cavity 11 is the maximum width, and the width of the fresh air outlet 12 is the diversion cavity 11. The minimum width. That is, the maximum width of the diversion cavity 11 is 5-10 times the minimum width. For example, the maximum width of the diversion cavity 11 may be 5 times, 6 times, 7 times, 8 times, 9 times or 10 times of its minimum width. As a result, on the one hand, it can be ensured that the rear of the diversion cavity 11 has an area capable of allowing most of the airflow entering the fresh air jet duct 10 to flow upward, and on the other hand, the width of the fresh air outlet 12 is sufficiently small to make it The slit-shaped fresh air outlet 12 extending vertically as a whole allows the airflow to obtain a sufficiently large acceleration when flowing from back to front, so as to obtain a larger air outlet speed and air supply distance. More importantly, the fresh air outlet 12 can be made to emit air evenly in the vertical direction. The above-mentioned proportional design of the maximum width and the minimum width of the diversion cavity 11 is a result obtained after a balanced consideration of various technical problems, and a better technical effect is achieved in all the above aspects. Conversely, if the width of the rear end of the diversion cavity 11 is too large compared to the width of the fresh air outlet 12, the area of the rear of the diversion cavity 11 will be too large. The distance is far. At this time, most of the air flow will directly flow upwards through the rear of the diversion cavity 11, and the air flow to the fresh air outlet 12 is very small, which leads to a large amount of air at the top of the fresh air outlet 12 and the fresh air outlet 12 The air output at the bottom and the middle is very small, and the air output from the fresh air outlet 12 is very uneven. If the width of the rear end of the diversion cavity 11 and the width of the fresh air outlet 12 are smaller, the difference in width between the two is small, and the acceleration effect obtained when the air flows from back to front is not obvious. The speed and air supply distance are relatively small.

In some embodiments, the cross section of the diversion cavity 11 has a tapered shape in a direction from back to front. _{The ratio between the width W 4 of} the rear end of the diversion cavity 11 in the lateral _{direction and the depth H 4 of the} diversion cavity 11 in the front and rear direction is an arbitrary ratio ranging from 2:11 to 2:9. For example, _{the ratio between the width W 4} and the depth H ₄ may be 2:11, 2:10, or 2:9. Therefore, it is possible to maintain a reasonable proportional relationship between the air flow rate allowed to pass through the rear portion of the diversion cavity 11 and the air flow rate capable of obtaining better acceleration backward and forward in the diversion cavity 11, avoiding the width W ₄ and the depth H. _If the ratio between 4 is too small, the air flow to the fresh air outlet 12 is not accelerated enough, or _{the ratio between the width W 4} and the depth H ₄ is too large, and the air flow to the bottom of the fresh air outlet 12 is large, and the air at the bottom of the fresh air outlet 12 is too large. The problem of small flow.

_{In some embodiments, the ratio between the length H 5 of the} arc-shaped deflector 13 in the front- _{rear direction and the depth H 4 of the} deflector cavity 11 in the front-rear direction is in the range of 4:11 to 7:11. Any ratio. It can be understood that the length H ₅ of the arc-shaped deflector 13 in the front-rear direction is the vertical distance between the front and rear ends of the arc-shaped deflector 13 in the front-rear direction. For example, _{the ratio between the length H 5} and the depth H ₄ may be 4:11, 5:11, 6:11, or 7:11. As a result, on the one hand, it can be ensured that the rear portion of the diversion cavity 11 has an area capable of causing most of the airflow entering the fresh air jet duct 10 to flow upward, and on the other hand, it can also be ensured that the arc-shaped constricted portion 111 has a reasonable length. This allows for better acceleration of the part of the airflow flowing from bottom to top to obtain a larger wind speed. Conversely, if _{the ratio between the length H 5} and the depth H ₄ is too small, the arc-shaped constricted portion 111 does not have a significant acceleration effect on the air flow, and the air outlet speed of the fresh air outlet 12 is small. If the ratio between the length H ₅ and the depth H ₄ is too large, most of the airflow in the diversion cavity 11 will be accelerated and sent out from the bottom of the fresh air outlet 12 under the action of the arc-shaped closing portion 111, resulting in the fresh air outlet 12 The air flow is uneven at the bottom and small at the top.

In some embodiments, the guide cavity 11 is provided with a plurality of guide vanes 14 located inside the fresh air outlet 12 and extending in the front-to-rear direction. The plurality of guide vanes 14 are arranged at intervals in the vertical direction for guiding the guide. The air flow in the flow cavity 11 flows toward the fresh air outlet 12.

_{Further, the length W 1 of the} baffle 14 in the front-rear direction is _{less than or equal to the length H 5 of the} arc-shaped baffle 13 in the front-rear direction, so that the baffle 14 is in the arc-shaped constriction 111. In other words, in the present invention, a plurality of guide vanes 14 arranged at intervals in the vertical direction are provided in the arc-shaped constricted portion 111, so as to facilitate the cooperation of the arc-shaped constricted portion 111 and the guide vane 14 to make the fresh air outlet 12 The wind in the vertical direction is more even. The guide vane 14 is located in the arc-shaped constriction 111, which can prevent the airflow flowing in the rear space of the diversion cavity 11 from leading to the front and back, so as to facilitate the airflow entering the fresh air jet duct 10 from bottom to top Ground flow is beneficial to achieve uniform air discharge in the vertical direction at the fresh air outlet 12.

In some embodiments, the guide cavity 11 is provided with a plurality of guide vanes 14 located inside the fresh air outlet 12 and extending in the front-to-rear direction. The plurality of guide vanes 14 are arranged at intervals in the vertical direction for guiding the guide. The air flow in the flow cavity 11 flows toward the fresh air outlet 12. Further, the strip-shaped fresh air outlet 12 is located on the front side of the fresh air jet duct 10, and the guide vane 14 may include an arc section 141 curved from back to front from bottom to top, and an end of the arc section 141. It extends forward to the straight section 142 of the strip-shaped fresh air outlet 12. Thereby, the preset amount of airflow in the airflow flowing from bottom to top can be kept inside the arc section 141 with the special shape, and the flow of this part of the airflow after encountering the arc section 141 can be reduced as much as possible. Under the premise of resistance, it is guided to the straight section 142, and the preset amount of airflow is guided to the fresh air outlet 12 through the straight section 142, so that the cooperation of a plurality of guide vanes 14 further improves the fresh air outlet 12 The uniformity of the wind in the vertical direction.

Further, in the present invention, a straight section 142 is specially designed on the front of the guide vane 14 adjacent to the fresh air outlet 12, and the straight section 142 can guide the air flow to be sent out horizontally through the fresh air outlet 12, thereby making the jet flow The air flow sent by the device 1 is consistent with the direction of the air flow sent from the heat exchange air outlet of the cabinet-type air conditioner indoor unit, so that the overall air supply speed of the cabinet-type air conditioner indoor unit is relatively high on the premise of ensuring a better mixing effect of the two air streams. High and long overall air supply distance.

_{In some embodiments, the length W 3 of the} arc-shaped section 141 in the front-rear direction is _{greater than or equal to the length W 2 of the} straight section 142 in the front-rear direction. Thus, on the one hand, the arc-shaped section 141 can be made to have a relatively long length in the front-to-rear direction, so as to increase the guide path length of the arc-shaped section 141 to the airflow and reduce the curvature of the arc-shaped section 141. In this way, the flow resistance after the airflow encounters the arc-shaped section 141 is reduced as much as possible. On the other hand, on the basis of ensuring the normal diversion function of the straight section 142, the length of the straight section 142 in the front-to-rear direction is made shorter, so as to reduce the length of the entire baffle 14 in the front-to-rear direction, thereby The size of the jet device 1 in the front-to-rear direction is reduced, making it more suitable for a cabinet-type air conditioner indoor unit with compact structure and high volume requirements.

In some embodiments, the straight section 142 of each guide vane 14 has the same length in the front-rear direction, and the arc-shaped section 141 of each guide vane 14 has the same length in the front-rear direction. In other words, the size of each guide vane 14 is the same to facilitate mold opening and save cost. The applicant has verified through in-depth analysis and a large number of simulations and experiments: as long as the size of the diversion cavity 11, the arc-shaped deflector 13 and/or the deflector 14 is designed according to the scheme in the above embodiment, and the fresh air fan 20 The air is continuously supplied toward the fresh air jet duct 10, even if the size of each guide vane 14 is the same, the fresh air outlet 12 can be uniformly discharged in the vertical direction.

In other embodiments, the straight section 142 of each guide vane 14 has the same length in the front-rear direction, and the arc-shaped sections 141 of the plurality of guide vanes 14 arranged in sequence from bottom to top are in the front-rear direction. The length increases in turn. As a result, it is possible to avoid the problem that the baffle 14 at the bottom protrudes backwards too long, resulting in too much air flow remaining inside it, thereby reducing the air flow at the top of the diversion cavity 11, and at the same time, it can also avoid multiple guides. The arc-shaped section 141 of the flow vane 14 is of equal length, which may cause the problem that the air flow guided by the upper guide vane 14 is less, so as to ensure the uniform air outlet of the fresh air outlet 12 in the vertical direction.

Further, the rear ends of the plurality of guide vanes 14 are on an inclined straight line. That is to say, the arc-shaped sections 141 of the plurality of guide vanes 14 arranged from bottom to top are successively extended at equal intervals, which further ensures the uniform outlet of the fresh air outlet 12 in the vertical direction.

In some embodiments, the bottom of the fresh air jet air duct 10 and the top of the fresh air fan 20 are in fluid communication through a volute air duct 30. The air inlet of the fresh air jet duct 10 is opened at its bottom, the air outlet of the fresh air fan 20 is located at the top, and the volute air duct 30 is sealedly connected between the air inlet of the fresh air jet duct 10 and the air outlet of the fresh air fan 20, In order to guide the air flow sent by the fresh air fan 20 to the fresh air jet air duct 10. Generally, in order to obtain a better air supply range, the air supply opening 453 of the cabinet-type air conditioner indoor unit and the two heat exchange air flow outlets are not adjacent to the ground, but have a certain height. In order to prevent the fresh air outlet 12 of the fresh air jet duct 10 from being too low, a volute air duct 30 is provided between the bottom of the fresh air jet duct 10 and the top of the fresh air fan 20, so that the fresh air jet duct 10 is better connected to the cabinet. The structure of the casing 40, the through passage 41 and the two heat exchange air ducts of the air conditioner indoor unit 1 are matched.

Specifically, the volute air duct 30 extends vertically. When only the fresh air jet air duct 10 is movable, the volute air duct 30 can be a soft air duct to be able to produce a certain amount of elastic deformation. When the fresh air jet air duct 10 and the fresh air fan 20 move synchronously or the fresh air jet air duct 10 is immovable, the volute air duct 30 may be a hard air duct.

Further, the height of the volute air duct 30 in the vertical direction is set such that the fresh air outlet 12 of the fresh air jet duct 10 is consistent with the heat exchange air outlets of the first heat exchange air duct and the second heat exchange air duct. , So that the air flow sent from the fresh air outlet 12 and the heat exchange air flow out of the heat exchange air flow outlet are better mixed.

In some embodiments, the through passage 41 penetrates the upper part of the casing 40 in the front-rear direction, that is, the through passage 41 is formed only in the middle of the upper part of the casing 40. The fresh air fan 20 is arranged in the lower part of the casing 40, and the fresh air pipe 70 passes through the rear wall of the casing 40 and is connected to the airflow inlet of the fresh air fan 20 in a sealed manner. Correspondingly, the volute air duct 30 is also arranged in the lower part of the casing 40 to prevent the fresh air fan 20 and the volute air duct 30 from being exposed to the outside and affecting the appearance of the cabinet-type air conditioner indoor unit 1.

The fresh air pipe 70 is arranged in the lower part of the cabinet, so that the fresh air pipe 70 can pass through the wall and communicate with the outdoor environment. The fresh air pipe 70 can pass through the wall together with the refrigerant pipe and the drain pipe to avoid additional holes in the wall.

Those skilled in the art should also understand that the terms "upper", "lower", "front", "rear" and other terms used to indicate the orientation or positional relationship in the embodiments of the present invention are based on the cabinet-type air conditioner indoor unit 1. In terms of actual usage status, these terms are only for facilitating the description and understanding of the technical solution of the present invention, rather than indicating or implying that the pointed device or device must have a specific orientation, be constructed and operated in a specific orientation, therefore It cannot be understood as a limitation to the present invention.

So far, those skilled in the art should realize that although multiple exemplary embodiments of the present invention have been illustrated and described in detail herein, they can still be disclosed according to the present invention without departing from the spirit and scope of the present invention. The content directly determines or derives many other variations or modifications that conform to the principles of the present invention. Therefore, the scope of the present invention should be understood and deemed to cover all these other variations or modifications.

Claims (10)

1. A cabinet type air conditioner indoor unit, which is characterized in that it comprises:

   A casing, the inside of the casing is formed with a through passage that penetrates the casing back and forth, and a first heat exchange air duct and a second heat exchange air duct which are located on both lateral sides of the through passage and are independent of each other, so The first heat exchange air duct and the second heat exchange air duct both have heat exchange airflow outlets, and the first heat exchange air duct and the second heat exchange air duct are both provided with heat exchangers and fans, So as to promote the heat exchange airflow in the first heat exchange air duct and the second heat exchange air duct to be sent out through its own heat exchange airflow outlet by the fan;

   The fresh air jet air duct is provided in the through channel independently of the first heat exchange air duct and the second heat exchange air duct; and

   A fresh air duct, one end of which is directly or indirectly connected with the fresh air jet duct, and the other end extends to the outside of the cabinet, so that the fresh air jet duct is connected to the outdoor environment through the fresh air duct, This allows outdoor fresh air to flow through the fresh air duct to the fresh air jet duct, and after flowing out through the fresh air jet duct, it exchanges with the air sent out through the first heat exchange air duct and the second heat exchange air duct. The hot air flows are mixed.
2. The cabinet type air conditioner indoor unit of claim 1, wherein:

   At least one air induction channel is defined between the air channel wall of the fresh air jet air channel and the side wall of the through channel; and

   The fresh air jet air duct is fixedly arranged in the through passage; or, the fresh air jet air duct is arranged to move in the through passage in a controlled manner or operably to open and close the at least one induced air Channel and/or adjust the flow area of the at least one draft channel.
3. The cabinet type air conditioner indoor unit of claim 1, further comprising:

   A fresh air fan, the air inlet of the fresh air fan is hermetically connected with the fresh air pipe so as to communicate with the outdoor environment through the fresh air pipe, and the air outlet of the fresh air fan communicates with the fresh air jet duct, The outdoor fresh air is driven by the fresh air fan to flow to the fresh air jet duct and sent out through the fresh air jet duct, so that the outdoor fresh air flowing out through the fresh air jet duct is different from that through the first changer. The hot air duct is mixed with the heat exchange air flow sent from the second heat exchange air duct.
4. The cabinet type air conditioner indoor unit of claim 3, wherein:

   One end of the fresh air pipe is hermetically connected with the airflow inlet of the fresh air fan, and the other end is arranged to be operable to expand and contract along the radial direction of the fresh air pipe.
5. The cabinet type air conditioner indoor unit of claim 3, wherein:

   The fresh air fan is a centrifugal fan arranged under the fresh air jet air duct to controlly drive the outdoor fresh air to flow into the centrifugal fan horizontally through the fresh air pipe, and flow into the fresh air from bottom to top Jet air duct.
6. The cabinet type air conditioner indoor unit of claim 5, wherein:

   The through passage penetrates the upper part of the casing in the front-to-rear direction; and

   The fresh air fan is arranged in the lower part of the casing, and the fresh air pipe passes through the rear wall of the casing and is connected to the airflow inlet of the fresh air fan in a sealed manner.
7. The cabinet type air conditioner indoor unit of claim 5, wherein:

   The heat exchange airflow outlets of the first heat exchange air duct and the second heat exchange air duct both face the front side of the casing, and the fresh air jet air duct is provided with a fresh air outlet on the front side; and

   The fresh air jet air duct defines a vertically extending diversion cavity, and the inside of the fresh air jet air duct is symmetrically provided with two vertically extending arc-shaped deflectors, the two arc-shaped deflectors Protruding and bending from back to front in the direction of approaching each other, so that the front part of the diversion cavity adjacent to the fresh air outlet forms a tapered arc-shaped constriction.
8. The cabinet type air conditioner indoor unit of claim 7, wherein:

   A plurality of guide vanes located inside the fresh air outlet are provided in the diversion cavity, and the plurality of guide vanes are arranged at intervals in the vertical direction; and

   The length of the deflector in the front-rear direction is less than or equal to the depth of the arc-shaped deflector in the front-rear direction, so that the deflector is in the arc-shaped constriction.
9. The cabinet type air conditioner indoor unit of claim 5, wherein:

   The heat exchange airflow outlets of the first heat exchange air duct and the second heat exchange air duct both face the front side of the casing, and a fresh air outlet is opened on the front side of the fresh air jet air duct, and the fresh air A vertically extending diversion cavity is defined in the jet air duct, and a plurality of diversion fins located inside the fresh air outlet port are arranged in the diversion cavity, and the plurality of diversion fins are arranged at intervals in the vertical direction; and

   The guide vane includes an arc section that curves and extends from back to front from bottom to top, and a straight section that extends forward from the end of the arc section to the fresh air outlet.
10. The cabinet type air conditioner indoor unit of claim 1, further comprising:

    The purification module is used to purify the outdoor fresh air flowing from the fresh air pipe to the fresh air jet duct.

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