Duct type air conditioner

Abstract

The invention discloses an air conditioner of a duct type air conditioner, and aims to solve the problem that the length size of the duct type air conditioner cannot be compressed and improved. The duct type air conditioner comprises an indoor unit, a shell of the indoor unit is provided with a mounting cavity, and an indoor heat exchanger is located in the mounting cavity. The fan assembly is located in the mounting cavity and is spaced from the indoor heat exchanger in the first linear direction. The fan assembly is provided with a plurality of exhaust outlets facing the indoor heat exchanger, the exhaust outlets are distributed at intervals in the second linear direction, and the first linear direction is perpendicular to the second linear direction. The number of the indoor heat exchangers is multiple, the multiple indoor heat exchangers are distributed at intervals in the second linear direction, and at least one air outlet is formed towards one indoor heat exchanger in the second linear direction so that the length size of the indoor unit in the second linear direction can be reduced. In the second linear direction, the air port end and the liquid port end of each indoor heat exchanger are located on the side, facing the other indoor heat exchanger, of one indoor heat exchanger. The indoor unit of the duct type air conditioner is small and exquisite in structure.

Description

Technical Field

[0001] The present invention relates to the technical field of air conditioning, and in particular to a duct air conditioner. Background Art

[0002] The indoor unit of the duct air conditioner is a duct unit. Due to the advantages of the duct unit such as concealed installation and easy coordination with home decoration ceiling, the duct air conditioner has better aesthetics when installed indoors.

[0003] When the air conditioner is running, inside the duct unit, the impeller of the fan assembly rotates so that the air near the shell enters the shell. The air exchanges heat with the heat exchanger while passing through the heat exchanger. The air after heat exchange can flow out of the shell and adjust the temperature and / or humidity near the installation area.

[0004] In the related technical solutions, in order to improve the heat exchange density per unit volume of the duct unit, the height and front-to-back dimensions of the duct unit can be appropriately compressed, and an indoor heat exchanger with a larger heat exchange area can be arranged in a limited space. However, on one side of the installation cavity of the duct unit (such as the left-right direction), due to the arrangement of the refrigerant pipe joint of the indoor heat exchanger and the electrical control box and other components, the indoor heat exchanger has a difficult-to-compress accommodation space between this end and the shell, and the length dimension of the duct unit in the left-right direction cannot be effectively compressed. Summary of the invention

[0005] The purpose of the present invention is to provide a duct air conditioner, aiming to solve the problem that the length of the duct air conditioner cannot be compressed and improved.

[0006] In order to achieve the above object, the present invention adopts the following technical scheme:

[0007] The present invention provides a duct air conditioner, comprising an indoor unit, wherein the indoor unit comprises a housing, an indoor heat exchanger and a fan assembly. The housing has an installation cavity, and the indoor heat exchanger is located in the installation cavity. The fan assembly is located in the installation cavity and is spaced apart from the indoor heat exchanger along a first straight line direction. The fan assembly has a plurality of exhaust ports arranged toward the indoor heat exchanger, and the plurality of exhaust ports are spaced apart along a second straight line direction, and the first straight line direction is perpendicular to the second straight line direction. There are a plurality of indoor heat exchangers, and the plurality of indoor heat exchangers are spaced apart along the second straight line direction, and at least one exhaust port is arranged along the second straight line direction toward one indoor heat exchanger, so as to reduce the length dimension of the indoor unit along the second straight line direction.

[0008] In this way, by setting a plurality of indoor heat exchangers spaced apart in the left-right direction in the installation cavity, the installation positions of the connection components such as the electrical box and the ports of the indoor heat exchanger can be adjusted accordingly, so that the indoor heat exchangers at the left and right ends are close to or in contact with the side walls of the corresponding installation cavity. Based on this, by reasonably utilizing the space in the installation cavity, in the indoor unit of the duct structure, the installation space at the electrical box on one side of the installation cavity is compressed. Thus, the length dimension of the indoor unit of the duct structure in the left-right direction can be greatly reduced.

[0009] Since the space between two adjacent indoor heat exchangers will reduce the heat exchange area of ​​the indoor heat exchanger, that is, the use of refrigerant pipes and fins of the indoor heat exchanger can be reduced, which is conducive to reducing the production cost of the indoor unit and has considerable economic benefits. On this basis, although the space between two adjacent indoor heat exchangers will reduce the heat exchange area of ​​the indoor heat exchanger, due to the small amount of air flowing through the indoor heat exchanger in this area, the impact on the heat exchange power and heat exchange efficiency of the indoor unit is limited.

[0010] In some embodiments, the indoor heat exchanger has an air port end and a liquid port end. Along the second straight line direction, the air port end and the liquid port end are located on the side of one indoor heat exchanger facing the other indoor heat exchanger, so that the indoor heat exchanger is arranged close to the two opposite side walls of the installation cavity.

[0011] In some embodiments, the indoor unit further comprises an electrical box for accommodating a control element for installing the fan assembly. Along the second straight line direction, the electrical box is installed in the installation cavity between two adjacent exhaust ports so that the indoor heat exchanger is arranged close to two opposite side walls of the installation cavity.

[0012] In some embodiments, the indoor unit further comprises a flow divider, which is located in the installation cavity between two adjacent indoor heat exchangers along the second straight line direction, and the plurality of liquid ports are connected to the pressure reducer through the flow divider.

[0013] In some embodiments, the indoor unit further includes an air collecting pipe, which is located in the installation cavity between two adjacent indoor heat exchangers along the second straight line direction, and the air outlet ends of the multiple indoor heat exchangers are connected to the compressor through the air collecting pipe.

[0014] In some embodiments, a plurality of indoor heat exchangers are connected in parallel and are configured such that the indoor unit is connected to a refrigeration circuit or a heating circuit via one or more indoor heat exchangers.

[0015] In some embodiments, the indoor unit further includes a plurality of air outlet baffles, along the second straight line direction, at the end of one indoor heat exchanger near another indoor heat exchanger, and an air outlet baffle is installed along the first straight line direction between the exhaust port and the indoor heat exchanger so that the air blown out from the exhaust port flows toward the corresponding indoor heat exchanger.

[0016] In some embodiments, along the second straight line direction, the indoor heat exchanger distributed near one end of the installation cavity is installed close to or in contact with one side of the shell, and the indoor heat exchanger distributed near the other end of the installation cavity is installed close to or in contact with the other side of the shell.

[0017] In some embodiments, the fan assembly includes a plurality of volutes and a plurality of centrifugal impellers, the plurality of volutes are spaced apart along a first straight line direction, and an exhaust port of at least one volute is arranged along a second straight line direction toward an indoor heat exchanger. A centrifugal impeller is installed in a volute to drive air from the exhaust port to the indoor heat exchanger.

[0018] In some embodiments, the fan assembly further includes a plurality of motors, the number of the motors is the same as the number of the volutes, one motor is installed in one volute, and the output end of the motor is connected to the centrifugal impeller to drive the centrifugal impeller to rotate.

[0019] In some embodiments, the fan assembly also includes a motor, which is arranged between two adjacent volutes, and the output shaft of the motor extends toward both ends along the second straight line direction and is inserted into multiple volutes. The motor is connected to multiple centrifugal impellers through the output shaft and drives the multiple centrifugal impellers to rotate synchronously. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings required for use in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0021] Figure 1 A schematic diagram of a refrigerant flow path of an air conditioner provided in an embodiment of the present application when in a cooling state;

[0022] Figure 2 A schematic diagram of a refrigerant flow path of an air conditioner provided in an embodiment of the present application when in a heating condition;

[0023] Figure 3 for Figure 1 A schematic diagram of a structure in which a gas-liquid separator and an oil separator are installed between the compressor and the four-way valve shown in FIG.

[0024] Figure 4 A schematic diagram of a refrigerant flow path of an air conditioner in a cooling-only mode provided in an embodiment of the present application;

[0025] Figure 5 A side view of an indoor unit of an air conditioner provided in an example of the present application;

[0026] Figure 6 for Figure 5 A schematic diagram of a three-dimensional structure of an indoor heat exchanger shown in ;

[0027] Figure 7 A side view of another indoor unit provided in an embodiment of the present application;

[0028] Figure 8 A schematic diagram of a three-dimensional structure of an indoor unit provided in an embodiment of the present application;

[0029] Fig. 9 for Figure 8 A three-dimensional structural schematic diagram of the middle partition plate and the fan assembly shown in;

[0030] Fig.10 It is a wind speed distribution cloud diagram of the section where the exhaust outlet is located;

[0031] Fig.11 for Figure 8 A top view of the indoor unit shown in ;

[0032] Fig.12 A top view of a first indoor unit provided in an embodiment of the present application;

[0033] Fig.13 A top view of a second indoor unit provided in an embodiment of the present application;

[0034] Fig.14 for Fig.12 A side view of the indoor unit shown.

[0035] Reference numerals:

[0036] 100-air conditioner;

[0037] 11-compressor; 12-four-way valve; 13-outdoor heat exchanger; 14-pressure reducer; 15-indoor heat exchanger; 151-refrigerant pipe; 152-fin; 153-gas port end; 154-liquid port end; 16-gas-liquid separator; 17-oil separator;

[0038] 20-Outdoor unit;

[0039] 30-Indoor unit;

[0040] 31-housing; 311-installation cavity; 3111-heat exchange cavity; 3112-fan cavity; 312-air outlet; 313-return air outlet;

[0041] 32-fan assembly; 321-volute; 322-centrifugal impeller; 323-air outlet; 324-air inlet; 325-motor;

[0042] 33-middle partition; 34-electrical box; 35-diverter; 36-air collecting pipe; 37-air outlet partition. DETAILED DESCRIPTION

[0043] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0044] In the description of the present invention, it should be understood that the terms "upper", "lower", "left", "right", "front", "back", "inside", "outside" and the like indicate directions or positional relationships based on the directions or relative positional relationships shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific direction, be constructed and operated in a specific direction. Therefore, it should not be understood as a limitation to the present invention. Unless otherwise specified, the above-mentioned directional description can be flexibly set in the process of actual application under the condition of satisfying the relative positional relationship shown in the drawings.

[0045] The terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include one or more of the features. In the description of the present invention, unless otherwise specified, "plurality" means two or more.

[0046] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", and "connected" should be understood in a broad sense, such as fixed connection, detachable connection, and integral connection. It can be directly connected or indirectly connected through an intermediate medium, and it can be the internal connection of two components or the electrical connection between two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0047] It should be noted that in actual applications, due to the limitations of equipment accuracy or installation errors, absolute parallel or perpendicular effects are difficult to achieve. The description of perpendicularity, parallelism or co-ordination in this application is not an absolute limiting condition, but means that a perpendicular or parallel structure setting can be achieved within a preset error range (such as an upper and lower deviation of 5°) and the corresponding preset effect can be achieved, thereby maximizing the technical effect of the defined feature and making the corresponding technical solution easy to implement and having high feasibility.

[0048] In the embodiments of the present invention, the terms "comprises", "comprising" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, article or device including a series of elements includes not only those elements, but also includes other elements not explicitly listed, or also includes elements inherent to such process, article or device. In the absence of further restrictions, an element defined by the sentence "comprising a ..." does not exclude the presence of other identical elements in the process, article or device including the element.

[0049] In the embodiments of the present invention, words such as "exemplary" or "for example" are used to indicate examples, illustrations or explanations. Any embodiment or design scheme described as "exemplary" or "for example" in the embodiments of the present invention should not be interpreted as being more preferred or more advantageous than other embodiments or designs. Specifically, the use of words such as "exemplary" or "for example" is intended to present the relevant concepts in a specific way.

[0050] An air conditioner is a device that can adjust and control the temperature, humidity and circulating air of the ambient air in a building or structure.

[0051] like Figure 1 As shown, the present application provides a duct air conditioner (hereinafter referred to as air conditioner 100), which may include a compressor 11, a four-way valve 12, an outdoor heat exchanger 13, a pressure reducer 14, and an indoor heat exchanger 15. Exemplarily, the four-way valve 12 may have a first port A, a second port B, a third port C, and a fourth port D, and the compressor 11 may have a return air end and an outlet air end, such as Figure 1 One end of the air flowing into the compressor 11 along the arrow direction is the return air end of the compressor, and the other end is the outlet air end of the compressor 11.

[0052] The return air end of the compressor 11 can be connected to the first port A of the four-way valve, the outlet air end of the compressor 11 can be connected to the second port B of the four-way valve, the third port C of the four-way valve can be connected to one end of the outdoor heat exchanger 13, the other end of the outdoor heat exchanger 13 can be connected to one end of the indoor heat exchanger 15 through the pressure reducer 14, and the other end of the indoor heat exchanger 15 can be connected to the fourth port D of the four-way valve.

[0053] Reference Figure 1 The air conditioner 100 may include an outdoor unit 20 and an indoor unit 30. For example, the compressor 11, the four-way valve 12 and the outdoor heat exchanger 13 may be part of the outdoor unit 20, and the corresponding indoor heat exchanger 15 may be part of the indoor unit 30. The pressure reducer 14 may be a capillary tube or an electronic expansion valve throttling device. The pressure reducer 14 may be Figure 1As shown, the pressure reducer 14 can be installed in the indoor unit 30, or it can be installed in the refrigerant pipeline between the outdoor unit 20 and the indoor unit 30. It is only necessary to make the pressure reducer 14 between the indoor heat exchanger 15 and the outdoor heat exchanger 13 along the flow direction of the refrigerant.

[0054] Based on this, driven by the compressor 11, the refrigerant can circulate between the indoor unit 30 and the outdoor unit 20 through the pipeline and produce a reversible phase change. While the refrigerant produces a phase change, it can release or absorb heat through the heat exchanger.

[0055] In this way, the refrigerant can exchange heat with the surrounding medium (such as air) in the outdoor unit 20 through the outdoor heat exchanger 13, thereby releasing heat and heating the surrounding air (or absorbing heat to cool the surrounding air). The refrigerant can exchange heat with the surrounding air in the indoor unit 30 through the indoor heat exchanger 15, thereby absorbing heat to cool the surrounding air (or releasing heat to heat the surrounding air), thereby achieving efficient cooling (or heating) of the air conditioner 100.

[0056] The air conditioner 100 can be configured as an outdoor unit 20 driving an indoor unit 30 to circulate the refrigerant, such as a one-to-one structure, or a high-power outdoor unit 20 driving multiple indoor units 30 to circulate the refrigerant, such as a household central air conditioner with a one-to-many structure. Alternatively, the air conditioner 100 can be configured as multiple outdoor units 20 connected in parallel and driving the indoor units 30 to circulate the refrigerant, such as a large air conditioning unit.

[0057] By setting the four-way valve 12, the operation mode of the air conditioner 100 can be flexibly adjusted between the hot-cooling condition and the heating condition, so that the air conditioner 100 can be applied to more usage scenarios.

[0058] When the air conditioner 100 is in cooling or dehumidification mode, Figure 1 Taking the solid arrow shown in FIG. 1 as an example, the four-way valve 12 can be adjusted to connect the second port B and the third port C, and to connect the fourth port D and the first port A.

[0059] In this way, the high-pressure gaseous refrigerant compressed by the compressor 11 can flow from the outlet end through the second port B and the third port C of the four-way valve 12 to the outdoor heat exchanger 13, so that the high-temperature and high-pressure gaseous refrigerant can be liquefied and release heat at the outdoor heat exchanger 13 to heat the air near the outdoor heat exchanger 13.

[0060] Subsequently, under the action of the pressure reducer 14, the pressure of the liquid refrigerant passing through the pressure reducer 14 and flowing into the indoor heat exchanger 15 is reduced, so that the liquid refrigerant can absorb heat and vaporize at the indoor heat exchanger 15, thereby exchanging and transferring heat between the outdoor heat exchanger 13 and the indoor heat exchanger 15 and cooling the air near the indoor heat exchanger 15. The refrigerant flowing out of the indoor heat exchanger 15 after vaporization can flow through the fourth port D and the first port A of the four-way valve 12 in sequence, and then the gaseous refrigerant can be sucked into the compressor 11 through the return air end and compressed, thereby realizing the circulation of the refrigerant.

[0061] When the air conditioner 100 is in the heating state, Figure 2 Taking the solid arrow shown in FIG. 1 as an example, the four-way valve 12 can be adjusted to connect the second port B and the fourth port D, and to connect the third port C and the first port A.

[0062] In this way, the high-temperature and high-pressure gaseous refrigerant compressed by the compressor 11 can flow from the outlet end through the second port B and the fourth port D of the four-way valve 12 to the Figure 2 The indoor heat exchanger 15 shown in the figure allows the high-temperature and high-pressure gaseous refrigerant to liquefy and release heat at the indoor heat exchanger 15 to heat the air near the indoor heat exchanger 15.

[0063] Then, under the action of the pressure reducer 14, the Figure 2 The pressure of the liquid refrigerant at the outdoor heat exchanger 13 is reduced, so that the liquid refrigerant can absorb heat and vaporize at the outdoor heat exchanger 13, thereby exchanging and transferring heat between the outdoor heat exchanger 13 and the indoor heat exchanger 15 and cooling the air around the outdoor heat exchanger 13. The vaporized refrigerant can flow through the third port C and the first port A of the four-way valve 12 in sequence, and then the gaseous refrigerant can be sucked into the compressor 11 through the return air end and compressed, thereby realizing the circulation of the refrigerant.

[0064] In order to prevent the gaseous refrigerant sucked into the compressor 11 from being mixed with liquid refrigerant or impurities, Figure 3 As shown, the air conditioner 100 may further include a gas-liquid separator 16, which may be installed between the first port A of the four-way valve 12 and the return air end of the compressor 11, so that the first port A may be connected and conducted with the return air end of the compressor 11 through the gas-liquid separator 16. In this way, when the gaseous refrigerant mixed with impurities such as liquid refrigerant or lubricating oil flows to the return air end of the compressor 11 through the gas-liquid separator 16, the gas-liquid separator 16 may separate non-gaseous impurities (such as liquid refrigerant, liquid lubricating oil or other impurities) to prevent the above impurities from entering the compressor 11 and affecting the stable operation of the compressor 11.

[0065] Continue to refer to Figure 3The air conditioner 100 may further include an oil separator 17, and the outlet end of the compressor 11 and the second port B of the four-way valve 12 may also be connected and conducted through the oil separator 17. In this way, the lubricating oil mixed in the high-temperature and high-pressure gaseous refrigerant can be separated in the process of flowing through the oil separator 17, thereby preventing the lubricating oil from adhering to the inner walls of the outdoor heat exchanger 13 and the indoor heat exchanger 15 when the refrigerant flows through the outdoor heat exchanger 13 and the indoor heat exchanger 15, so that the indoor heat exchanger 15 and the outdoor heat exchanger 13 have a higher heat exchange efficiency.

[0066] In some other embodiments, it is not necessary to provide a four-way valve.

[0067] like Figure 4 As shown, the air outlet of the compressor 11 can be connected to one end of the pressure reducer 14 through the outdoor heat exchanger 13, and the air return end of the compressor 11 can be connected to the other end of the pressure reducer 14 through the gas-liquid separator 16 and the indoor heat exchanger 15 in sequence. So that the refrigerant can circulate between the compressor 11, the outdoor heat exchanger 13, the pressure reducer 14, the indoor heat exchanger 15, the gas-liquid separator 16 and the compressor 11, at this time, the outdoor heat exchanger 13 can be used to heat the nearby air, and the indoor heat exchanger 15 can be used to cool the nearby air, so that the air conditioner 100 operates in a cooling condition or a dehumidification condition (i.e., a cooling-only mode air conditioner).

[0068] It should be noted that the indoor unit 30 of the air conditioner 100 may be a duct structure, and the indoor unit 30 of the duct structure is usually installed and arranged in conjunction with a ceiling structure, such as concealed installation of the indoor unit 30 in conjunction with a ceiling structure. This has the advantages of concealed installation, easy coordination with a home ceiling, and good aesthetics.

[0069] like Figure 5 As shown, the indoor unit 30 of the duct structure may include a housing 31, a fan assembly 32 and an indoor heat exchanger 15, the housing 31 may have an installation cavity 311, and the fan assembly 32 and the indoor heat exchanger 15 may be arranged at intervals in the installation cavity 311. Taking the fan assembly 32 and the indoor heat exchanger 15 in the installation cavity 311 as an example, the fan assembly 32 and the indoor heat exchanger 15 are arranged at intervals along the front-to-back direction (i.e., the first straight line direction), the housing 31 may be provided with an air outlet 312 at the front side of the installation cavity 311, and the housing 31 may be provided with a return air outlet 313 at the rear side of the installation cavity 311, so that the fan assembly 32 can drive air to enter the installation cavity 311 from the return air outlet 313 and be discharged from the air outlet 312 after flowing through the indoor heat exchanger 15.

[0070] Based on this, in the installation cavity 311, the indoor heat exchanger 15 can be arranged close to the front air outlet 312, and the fan assembly 32 can be arranged close to the rear air return outlet 313. In this way, when the air conditioner is running, the fan assembly 32 can rotate to drive air from the return air outlet 313 into the installation cavity 311 and can be blown toward the indoor heat exchanger 15 from the air outlet end of the fan assembly 32, so that the refrigerant flowing in the indoor heat exchanger 15 can quickly exchange heat with the air flowing through it.

[0071] like Figure 5 and Figure 6 As shown, the length direction of the indoor heat exchanger 15 and the shell 31 can be the left-right direction (i.e., the second straight line direction), and the indoor heat exchanger 15 can include a plurality of refrigerant tubes 151 and a plurality of fins 152, the refrigerant tubes 151 can extend in the left-right direction, and the fins 152 can be an integrated sheet structure. The plurality of fins 152 can be spaced apart in the left-right direction, and the refrigerant tube 151 can penetrate the plurality of fins 152 in the left-right direction and be in contact with and connected to the plurality of fins 152, such as the refrigerant tube 151 and the fins 152 can be in contact and fixed by brazing process to form an indoor heat exchanger 15 of an integrated structure.

[0072] For example, a plurality of plug holes (or plug slots) may be provided on a fin 152, and the plurality of plug holes (or plug slots) on the plurality of fins 152 may be arranged in an aligned manner in the left-right direction, so that the refrigerant tube 151 passing through the plug hole and passing through the fin 152 may be in contact with the fin 152 while the plurality of refrigerant tubes 151 may be distributed at intervals in the plane of the fin 152. In this way, the plurality of refrigerant tubes 151 may be connected to form one or more refrigerant passages, so that the flowing refrigerant may be in full contact with the air through the refrigerant tube 151 and the fin 152, thereby improving the heat exchange efficiency of the indoor heat exchanger 15. The refrigerant tube may be a round tube structure or a microchannel flat tube structure made of copper or aluminum metal or alloy.

[0073] Taking the fin 152 as a rectangular sheet structure as an example, a plurality of fins 152 and a plurality of refrigerant tubes 151 can be connected to form a Figure 6 The flat plate heat exchanger shown. Figure 5 In the installation cavity 311 shown, since the height dimension of the installation cavity 311 in the up and down directions is limited, the upper side edge of the flat plate structure indoor heat exchanger 15 can be arranged to tilt forward, so that the heat exchange area of ​​the indoor heat exchanger 15 can be increased within the limited height space.

[0074] In some other embodiments, such as Figure 7As shown, each fin 152 may be an integrated sheet structure, and on this basis, the upper and lower ends of the fin 152 may be bent backwards to form a V-shaped or C-shaped fin. In this way, the upper and lower ends of the indoor heat exchanger 15 may be bent toward the fan assembly 32, and the integrated fin 152 may be used to form an integrated indoor heat exchanger 15, which is beneficial to increase the heat exchange area of ​​the indoor heat exchanger 15 in the air duct machine.

[0075] Alternatively, the integrated fin 152 may be configured as a W-shaped or other multi-fold structure to form a multi-fold indoor heat exchanger 15 located in the installation cavity 311, thereby further increasing the heat exchange area of ​​the indoor heat exchanger 15 in the air duct unit.

[0076] Alternatively, you can also Figure 6 The flat plate-type indoor heat exchangers 15 shown are spliced ​​to form the above-mentioned C-shaped, V-shaped or other multi-fold structured special-shaped heat exchangers, which are not limited in the present application.

[0077] In some embodiments, Figure 7 As shown, the fan assembly 32 located in the installation cavity 311 can be a centrifugal fan structure, and the fan assembly 32 can include a volute 321 and a centrifugal impeller 322, and the centrifugal impeller 322 is installed in the volute 321. The volute 321 has an exhaust port 323 and an air inlet 324. An exhaust port 323 of a volute 321 can be arranged forward toward the indoor heat exchanger 15, and the air outlet 312 and the exhaust port 323 on the front side of the installation cavity 311 can be located at the front and rear sides of the indoor heat exchanger 15. Exemplarily, the exhaust port 323 can be arranged close to the upper side of the installation cavity 311 in the up and down direction.

[0078] Combination Figure 7 and Figure 8 In the installation cavity 311, the axial direction of the centrifugal impeller 322 can be arranged parallel to the left and right direction, that is, the centrifugal impeller 322 can rotate around the axis parallel to the left and right direction, and is used to drive the air to flow through the return air port 313 and the air inlet 324 in sequence and can be blown to the indoor heat exchanger 15 from the exhaust port 323. Among them, the axial direction of the centrifugal impeller 322 can also be regarded as the axial direction of the fan assembly 32. Since the centrifugal fan has the characteristics of small size, low noise and high wind pressure, it is beneficial to increase the air circulation in the duct machine with limited height space.

[0079] In the installation cavity 311, as Figure 8As shown, the fan assembly 32 may include a plurality of volutes 321 and a plurality of centrifugal impellers 322, and the plurality of volutes 321 may be spaced apart in the left-right direction, and a centrifugal impeller 322 may be installed in a volute 321. That is, the plurality of volutes 321 may be arranged in a one-to-one correspondence with the plurality of centrifugal impellers 322, so that the rotating centrifugal impellers 322 may drive the air to blow from the exhaust port 323 to the indoor heat exchanger 15, and at this time, the exhaust ports 323 of the plurality of volutes 321 are also spaced apart in the left-right direction, that is, the plurality of exhaust ports 323 of the fan assembly 32 are spaced apart in the left-right direction (the second straight line direction).

[0080] In some embodiments, Figure 8 As shown, the fan assembly 32 may further include a motor 325, which may be arranged between two adjacent volutes 321, and the output shaft of the motor 325 may extend to both ends in the left-right direction and be inserted into two, three or more volutes 321. The output shaft of the motor 325 may be connected to a plurality of centrifugal impellers 322, and may drive the plurality of centrifugal impellers 322 to rotate synchronously, so that the plurality of centrifugal impellers 322 may be driven to rotate by one motor 325, which has a simple structure and reduces the number of motors 325 to be set.

[0081] Alternatively, the number of motors 325 may be multiple and the same as the number of volutes 321, and multiple motors 325 may be arranged in a one-to-one correspondence with multiple volutes 321, such as one motor 325 may be installed in one volute 321, and the output shaft of the motor 325 may be connected to the centrifugal impeller 322 in the volute 321. In this way, one motor 325 can drive one centrifugal impeller 322 to rotate, so as to flexibly control the rotation speed of each centrifugal impeller 322 to adjust the air volume at the corresponding exhaust port 323.

[0082] In some other embodiments, the fan assembly 32 may also be an axial flow fan structure, for example, the axial direction of the axial flow fan may be arranged parallel to the front-to-back direction, and the axial flow fan may blow air forward and make the air flow through the front indoor heat exchanger 15. A plurality of axial flow fans may be distributed at intervals along the left-right direction, and in this case, the air outlet side in front of an axial flow fan is equivalent to the air outlet of a fan assembly 32.

[0083] In some embodiments, Figure 8 As shown, the indoor unit 30 may further include a middle partition 33, which is located in the installation cavity 311 and connected to the housing 31, so as to separate the installation cavity 311 into a heat exchange cavity 3111 and a fan cavity 3112 along the front-to-back direction. The middle partition 33 is provided with an opening connecting the heat exchange cavity 3111 and the fan cavity 3112, and the fan assembly 32 has a plurality of exhaust ports 323 (such as Figure 7As shown in the figure, the plurality of openings of the plurality of middle partitions 33 can be arranged one by one in correspondence, such as an exhaust port 323 can be connected and installed in alignment with an opening of a middle partition 33, so that air can be blown toward the indoor heat exchanger 15 in the heat exchange cavity 3111 through the exhaust port 323 and the opening of the middle partition 33.

[0084] For the indoor unit 30 of the duct structure, Figure 8 As shown, there is a spacing space between the right end of the indoor heat exchanger 15 and the right side wall of the shell 31, and multiple liquid ports and multiple gas ports of the indoor heat exchanger 15 are located in the spacing space, and the pressure reducer 14 (such as Figure 1 As shown in the figure, the splitter and the air collecting pipe are installed in the partition space. Correspondingly, the indoor unit 30 may also include an electrical box 34, which is used to accommodate and install control elements such as the fan assembly 32, the compressor 11, and the pressure reducer 14 of the electronic structure. The electrical box 34 can be located at the right end of the fan cavity 3112, that is, the electrical box 34 and the partition space in the heat exchange cavity 3111 are both located at the right end of the installation cavity 311.

[0085] Thus, in order to improve the heat exchange density of the indoor unit 30 of the duct structure, the height dimension and the width dimension in the front-to-back direction of the indoor unit 30 can be appropriately compressed, and the indoor heat exchanger 15 with a larger heat exchange area can be arranged in the limited heat exchange cavity 3111, which is conducive to compressing the volume of the indoor unit 30. However, as for the length dimension of the indoor unit 30 in the left-right direction, due to the existence of the above-mentioned separation space and the electrical box 34, it is difficult to further compress the length dimension of the indoor unit 30 of the duct structure.

[0086] Combination Figure 8 and Fig. 9 The shape of the middle partition 33 is equivalent to the cross-sectional shape of the installation cavity 311 in the direction perpendicular to the front-rear direction. Obviously, the total area of ​​the exhaust ports 323 of the multiple volutes only occupies a small part of the area of ​​the middle partition 33. Fig.10 , it can be seen that the air volume of the indoor unit 30 is concentrated at the exhaust port 323, and the wind speed distribution at the exhaust port 323 is approximately an M-shaped structure (not uniformly distributed), corresponding to the indoor heat exchanger 15 (such as Figure 8 The air volume on the rear side (i.e., the windward side) of the indoor heat exchanger 15 is concentrated in the area directly opposite to the exhaust port 323 in the front-to-rear direction, and the air circulating in other areas on the windward side of the indoor heat exchanger 15 is less (negligible).

[0087] Corresponding, combined Fig.11 As shown, Fig.11 for Figure 8In the top view of the indoor unit 30 shown in FIG, at A of the indoor heat exchanger 15 corresponding to the area between two adjacent volutes 321, the air blown out by the two volutes 321 will form an air flow deviation in the area at A and generate air supply noise. Correspondingly, at B at one end of the indoor heat exchanger 15 close to the electrical box 34, part of the flowing air will form an air flow deviation with the pipe and other structures and generate air supply noise.

[0088] Based on this, Fig.12 As shown, Fig.12 1 is a top view of an indoor unit 30 provided in an embodiment of the present application. In the heat exchange chamber 3111 of the indoor unit 30, a plurality of indoor heat exchangers 15 may be arranged. The plurality of indoor heat exchangers 15 arranged in the heat exchange chamber 3111 may be a structure with a relatively small length, and the plurality of indoor heat exchangers 15 may be spaced apart in the left-right direction so that at least one exhaust port 323 (such as Fig. 9 As shown in the figure, the indoor heat exchanger 15 can be arranged forwardly, which is beneficial to reduce the length dimension of the indoor unit 30 in the left-right direction.

[0089] The main reason why the length of the indoor unit 30 cannot be compressed is the space occupied by the connection structure between the electrical box 34 and the port on one side of the indoor heat exchanger 15. In the heat exchange cavity 3111, a joint and a connection structure can be set between two adjacent indoor heat exchangers 15, and the electrical box 34 can be installed at this position, and the electrical box 34 can also be installed between two adjacent volutes 321 in the fan cavity 3112, which is conducive to reducing the length of the indoor unit 30 in the left-right direction, and is conducive to reducing the air supply noise caused by the air flow deviation near the indoor heat exchanger 15.

[0090] For example, Fig.12 and Fig.13 As shown, the number of indoor heat exchangers 15 can be two, and the two indoor heat exchangers 15 are spaced apart in the left-right direction in the heat exchange cavity 3111. Correspondingly, the number of volutes 321 can be two or more, such as two exhaust ports 323 (such as Fig. 9 As shown) an indoor heat exchanger 15 can be arranged in a forward-aligned manner.

[0091] If the number of indoor heat exchangers 15 is two and the number of volutes 321 is three, the exhaust port 323 of one of the volutes 321 can be set to align forward with one indoor heat exchanger 15, and the exhaust ports 323 of the other two volutes 321 can also be set to align forward with another indoor heat exchanger 15.

[0092] In some embodiments, Figure 8 and Fig.12As shown, the electrical box 34 at the left or right end of the fan cavity 3112 can be adjusted and installed between the heat exchange cavities 3111, such as installing the electrical box 34 between two adjacent indoor heat exchangers 15, or installing the electrical box 34 in the fan cavity 3112 between two adjacent volutes 321. In this way, it is helpful to reduce the length dimension of the fan cavity 3112 in the left and right direction.

[0093] like Figure 8 and Fig.13 As shown, the indoor heat exchanger 15 has an air port end 153 and a liquid port end 154, and one air port end 153 and one liquid port end 154 can be connected by one or more refrigerant pipes 151 to form a refrigerant flow path. One or more refrigerant flow paths can be set in one indoor heat exchanger 15, and the air port end 153 and the liquid port end 154 can be located on one side of the indoor heat exchanger 15 facing the other indoor heat exchanger 15 along the left-right direction. Between two adjacent indoor heat exchangers 15, the air port end 153 and the liquid port end 154 can be arranged at the right end of the indoor heat exchanger 15 on the left, and the air port end 153 and the liquid port end 154 can be arranged at the left end of the indoor heat exchanger 15 on the right, that is, the air port end 153 and the liquid port end 154 can be located at the left end or the right end of the indoor heat exchanger 15.

[0094] For an indoor heat exchanger 15 in the middle of the three indoor heat exchangers 15, a gas port 153 and a liquid port 154 may be arranged at at least one of the left and right ends thereof. In this way, the length dimension of the heat exchange chamber 3111 in the left-right direction is reduced.

[0095] Based on this, in the installation cavity 311 such as the heat exchange cavity 3111 and the fan cavity 3112, by setting a plurality of indoor heat exchangers 15 spaced apart in the left-right direction, and adjusting the installation positions of the connecting components such as the ports of the electrical box 34 and the indoor heat exchanger 15 accordingly, the indoor heat exchangers 15 at the left and right ends can be made close to or in contact with the side walls of the corresponding installation cavity 311 (or the shell 31). For example, the left end of an indoor heat exchanger 15 on the left side can be set close to or in contact with the left side wall of the shell 31, and the right end of an indoor heat exchanger 15 on the right side can be set close to or in contact with the right side wall of the shell 31.

[0096] By properly utilizing the space in the installation cavity 311, Figure 5 In the indoor unit 30 of the duct structure shown, the installation space at the electrical box 34 on the right side of the fan chamber 3112 and the accommodating chamber space at the port connector on the right side of the heat exchange chamber 3111 can be compressed. Thus, the length dimension of the indoor unit 30 of the duct structure in the left-right direction can be greatly reduced.

[0097] For example, in the space between two adjacent indoor heat exchangers 15 in the heat exchange cavity 3111, the electrical box 34 arranged therein can be arranged close to or in contact with the upper side wall of the housing 31. In this way, the motor in the fan cavity 3112 can be prevented from obstructing the installation space of the electrical box 34, and the electrical box 34 arranged in contact with the housing 31 can be quickly heat-conducted through the housing 31, which is conducive to the rapid heat dissipation of the components in the electrical box 34.

[0098] Since the space between two adjacent indoor heat exchangers 15 reduces the heat exchange area of ​​the indoor heat exchanger 15, the amount of refrigerant pipes 151 and fins 152 used in the indoor heat exchanger 15 can be reduced, which is beneficial to reducing the manufacturing cost of the indoor unit 30 and has considerable economic benefits. On this basis, although the space between two adjacent indoor heat exchangers 15 reduces the heat exchange area of ​​the indoor heat exchanger 15, the amount of air flowing through the indoor heat exchanger 15 in this area is small, and the effect on the heat exchange power and heat exchange efficiency of the indoor unit is limited.

[0099] In some embodiments, Fig.13 As shown, the indoor unit 30 may further include a diverter 35 , which may be located in the fan chamber 3112 between two adjacent indoor heat exchangers 15 along the left-right direction, and a plurality of liquid ports 154 may be connected to the pressure reducer 14 through the diverter 35 .

[0100] When the air conditioner 100 is operated in a cooling condition, the refrigerant passing through the outdoor heat exchanger 13 may not be completely liquefied, that is, the refrigerant flowing from the pressure reducer 14 to the indoor heat exchanger 15 is in a gas-liquid two-phase mixed state. In this way, by setting the flow divider 35, the refrigerant can be more evenly diverted when flowing through the flow divider 35, thereby improving the uniformity of the two-phase refrigerant in the multiple refrigerant channels flowing into the indoor heat exchanger 15, which is beneficial to improving the overall heat exchange efficiency of the indoor heat exchanger 15.

[0101] Continue to refer to Fig.13 The indoor unit 30 may further include an air collecting pipe 36, which may be located in the fan chamber 3112 between two adjacent indoor heat exchangers 15 along the left-right direction, and the plurality of air outlet ends 153 may be connected to the four-way valve 12 (such as Figure 1 As shown) or compressor 11, so as to facilitate the connection and conduction of the refrigerant circulation passage.

[0102] Since the flow divider 35 and the air collecting pipe 36 can be installed between two adjacent indoor heat exchangers 15, a large installation gap between the left and right ends of the installation cavity 311 and the corresponding indoor heat exchanger 15 can be avoided, which is beneficial to reducing the length dimension of the indoor unit in the left and right direction.

[0103] It should be noted that, for the multiple indoor heat exchangers 15 in the heat exchange cavity 3111, the multiple indoor heat exchangers 15 can be connected in parallel and connected to the refrigeration circuit or the heating circuit, so that the refrigerant can flow through the multiple indoor heat exchangers 15 under the refrigeration condition or the heating condition at the same time for heat exchange. At this time, the refrigerant flow in the multiple indoor heat exchangers 15 can be controlled according to the temperature adjustment, and the speed of the fan assembly 32 can be adjusted accordingly to adapt to the different operating powers of the air conditioner 100.

[0104] Alternatively, an electrically controlled valve may be connected to the liquid port 154 or the gas port 153 of one or more indoor heat exchangers 15 to adjust and control the connection of one or more indoor heat exchangers 15 to the corresponding refrigeration circuit or heating circuit.

[0105] For example, when the air conditioner 100 is in a higher operating power, all the electrically controlled valves can be adjusted to open so that multiple indoor heat exchangers 15 are connected in parallel and connected to the refrigeration circuit or the heating circuit, so that the indoor unit 30 is in a high-power or full-power operating state through a larger indoor heat exchange area and refrigerant flow.

[0106] When the air conditioner 100 is in a relatively low operating power, one or part of the electric control valves can be adjusted to open so that one or part of the indoor heat exchangers 15 are connected to the corresponding refrigeration circuit or heating circuit, that is, the refrigerant can flow through one or part of the indoor heat exchangers 15 to accurately adjust the temperature near the indoor unit 30. At this time, the multiple centrifugal impellers 322 of the fan assembly 32 can be regulated separately, such as only opening the centrifugal fan corresponding to one indoor heat exchanger 15 with refrigerant flowing, which is conducive to further improving the power consumption ratio of the air conditioner 100.

[0107] In some embodiments, Fig.12 and Fig.14 As shown, the indoor unit 30 may further include a plurality of air outlet baffles 38. In the left-right direction, at the end of one indoor heat exchanger 15 close to another indoor heat exchanger 15, an air outlet baffle 38 may be installed between the exhaust port 323 and the indoor heat exchanger 15 in the front-to-back direction, so that the air blown out of the exhaust port 323 can flow smoothly toward the aligned indoor heat exchangers, thereby avoiding air leakage disturbance.

[0108] For example, if two indoor heat exchangers 15 are installed in the indoor unit 30, the number of corresponding air outlet baffles 38 can be two, such as the right end of the indoor heat exchanger 15 on the left can be connected to the vicinity of the right edge of the left exhaust port 323 through the air outlet baffle 38, and the left end of the indoor heat exchanger 15 on the right can be connected to the vicinity of the left edge of the right exhaust port 323 through the air outlet baffle 38. In this way, the upper and lower sides of the air outlet baffle 38 can be connected to the upper and lower side walls of the heat exchange cavity 3111, so that the air outlet baffle 38 and the corresponding heat exchange cavity 3111 can enclose the air duct structure between the exhaust port 323 and the indoor heat exchanger 15, which can prevent air leakage and reduce aerodynamic noise.

[0109] If three or more indoor heat exchangers 15 (i.e., n) are installed in the indoor unit 30, the number of the air outlet baffles 38 may be 2n-2. That is, at a central indoor heat exchanger 15, its left end may be connected to the vicinity of the left edge of an aligned exhaust port 323 through an air outlet baffle 38, and the right end of the indoor heat exchanger 15 may be connected to the vicinity of the right edge of the aligned exhaust port 323 through an air outlet baffle 38.

[0110] In this way, the air blown out from the exhaust port 323 can be blown toward an indoor heat exchanger 15 through the air duct structure surrounded by the air outlet baffle 38 and the shell 31, so that the wind speed distribution on the windward side of the indoor heat exchanger 15 is more uniform, which is beneficial to improving the heat exchange efficiency of the indoor unit 30.

[0111] Furthermore, in the area of ​​the heat exchange cavity 3111 between two adjacent exhaust ports 323 (such as Fig.11 In the A area in the figure, the air blown out by the two air outlets 323 will not produce air flow deviation phenomenon, which helps to reduce or even eliminate abnormal air supply noise.

[0112] In the description of this specification, specific features, structures, materials or characteristics may be combined in an appropriate manner in any one or more embodiments or examples.

[0113] The above are only specific embodiments of the present invention, but the protection scope of the present invention is not limited thereto. Any person skilled in the art who is familiar with the technical field can easily think of changes or substitutions within the technical scope disclosed by the present invention, which should be included in the protection scope of the present invention. Therefore, the protection scope of the present invention should be based on the protection scope of the claims.

Claims

1. A duct air conditioner, comprising an indoor unit, characterized in that: The indoor unit comprises: A housing having a mounting cavity; An indoor heat exchanger is located in the installation cavity; and a fan assembly, located in the installation cavity and spaced apart from the indoor heat exchanger along a first straight line direction; The fan assembly has a plurality of exhaust ports disposed toward the indoor heat exchanger, and the plurality of exhaust ports are spaced apart along a second straight line direction, and the first straight line direction is perpendicular to the second straight line direction; There are multiple indoor heat exchangers, the multiple indoor heat exchangers are spaced apart along the second straight line direction, and at least one exhaust port is arranged along the second straight line direction toward one of the indoor heat exchangers; The indoor heat exchanger has an air port end and a liquid port end. Along the second straight line direction, the air port end and the liquid port end are located on the side of one indoor heat exchanger facing the other indoor heat exchanger, so that the indoor heat exchanger is arranged close to the two opposite side walls of the installation cavity.

2. The duct air conditioner according to claim 1, characterized in that: The indoor unit further comprises: The flow diverter is located in the installation cavity between two adjacent indoor heat exchangers along the second straight line direction; and the plurality of liquid ports are connected to the pressure reducer through the flow diverter.

3. The duct air conditioner according to claim 1, characterized in that: The indoor unit further comprises: An air collecting pipe is arranged along the second straight line direction, the air collecting pipe is located in the installation cavity between two adjacent indoor heat exchangers, and the air outlet ends of the plurality of indoor heat exchangers are connected to a compressor through the air collecting pipe.

4. The duct air conditioner according to claim 1, characterized in that: A plurality of the indoor heat exchangers are connected in parallel and are configured as follows: The indoor unit is connected to a refrigeration circuit or a heating circuit through one or more indoor heat exchangers.

5. The duct air conditioner according to any one of claims 1 to 4, characterized in that: The indoor unit further comprises: A plurality of air outlet baffles are provided along the second straight line direction at the end of one indoor heat exchanger close to another indoor heat exchanger, and one air outlet baffle is installed along the first straight line direction between the exhaust port and the indoor heat exchanger so that the air blown out from the exhaust port flows toward the corresponding indoor heat exchanger.

6. The duct air conditioner according to claim 5, characterized in that: Along the second straight line direction, the indoor heat exchanger distributed near one end of the installation cavity is installed close to or in contact with one side of the shell, and the indoor heat exchanger distributed near the other end of the installation cavity is installed close to or in contact with the other side of the shell.

7. The duct air conditioner according to any one of claims 1 to 4, characterized in that: The fan assembly comprises: A plurality of volutes, wherein the plurality of volutes are spaced apart along the first straight line direction, and the exhaust port of at least one of the volutes is arranged along the second straight line direction toward one of the indoor heat exchangers; And a plurality of centrifugal impellers, one of the centrifugal impellers is installed in one of the volutes, and is used to drive air from the exhaust port to blow toward the indoor heat exchanger.

8. The duct air conditioner according to claim 7, characterized in that: The fan assembly also includes: A plurality of motors, the number of the motors is the same as the number of the volutes, one motor is installed in one volute, and the output end of the motor is connected to the centrifugal impeller to drive the centrifugal impeller to rotate; or, A motor is arranged between two adjacent volutes, and the output shaft of the motor extends toward both ends along the second straight line direction and is inserted into the multiple volutes. The motor is connected to the multiple centrifugal impellers through the output shaft and drives the multiple centrifugal impellers to rotate synchronously.

9. A duct air conditioner, comprising an indoor unit, characterized in that: The indoor unit comprises: A housing having a mounting cavity; An indoor heat exchanger is located in the installation cavity; and a fan assembly, the fan assembly being located in the installation cavity and spaced apart from the indoor heat exchanger along a first straight line direction; The fan assembly has a plurality of exhaust ports disposed toward the indoor heat exchanger, and the plurality of exhaust ports are spaced apart along a second straight line direction, and the first straight line direction is perpendicular to the second straight line direction; There are multiple indoor heat exchangers, which are spaced apart along the second straight line direction, and at least one exhaust port is arranged along the second straight line direction toward one of the indoor heat exchangers to reduce the length dimension of the indoor unit along the second straight line direction.

10. The duct air conditioner according to claim 9, characterized in that: The indoor unit further comprises: The electrical box is used to accommodate the control components for installing the fan assembly; along the second straight line direction, the electrical box is installed in the installation cavity between two adjacent exhaust ports so that the indoor heat exchanger is arranged close to the two opposite side walls of the installation cavity.

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