Integrated indoor and outdoor air conditioning unit and air conditioner

Abstract

The application relates to an inside-outside integrated air conditioning unit and an air conditioner, and relates to the technical field of air conditioners, to solve the problem that an air conditioner frequently enters a defrosting working condition under a heating working condition and cannot perform heating under the defrosting working condition. The shell of the inside-outside integrated air conditioning unit comprises a first chamber, a second chamber and a first air inlet and a first air outlet in communication with the first chamber, which are arranged in separation. An outdoor heat exchanger is located in the second chamber. A first fan and an indoor heat exchanger are located in the first chamber, so as to drive air to flow through the first air inlet, the indoor heat exchanger and the first air outlet in sequence. The outer side wall of a defrosting air duct in the shell is arranged adjacent to or in contact with the outdoor heat exchanger. The defrosting air duct comprises a second air inlet and a second air outlet in communication with the first chamber, so that part of the air driven by the first fan to flow through the indoor heat exchanger reciprocally flows in the first chamber and the defrosting air duct. The outdoor heat exchanger is heated and defrosted through the defrosting air duct, and the air conditioning unit is in a heating working condition.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of air conditioners, and in particular to an indoor-outdoor integrated air conditioning unit and an air conditioner. BACKGROUND

[0002] An air conditioner has a problem of frost formation on an outdoor heat exchanger in a heating mode, and the frost attached to the outer surface of the outdoor heat exchanger affects the heat exchange efficiency and heating effect of the air conditioner.

[0003] Currently, the air conditioner defrosting is to control the unit to switch from the heating mode to the refrigeration mode (i.e., the defrosting mode) so that the refrigerant in the outdoor heat exchanger is removed from the frost on the outer surface by gasification and heat release. However, the indoor unit of the air conditioner in the defrosting mode is in a refrigeration state, and the outdoor heat exchanger in the heating mode will frequently frost, which will affect the user experience in the heating mode. SUMMARY

[0004] The present application provides an indoor-outdoor integrated air conditioning unit and an air conditioner to solve the problem that the air conditioner frequently enters the defrosting mode in the heating mode and cannot heat in the defrosting mode.

[0005] In a first aspect, the present application provides an indoor-outdoor integrated air conditioning unit, comprising a casing, an outdoor heat exchanger, an indoor heat exchanger, and a first fan. The casing comprises a first chamber and a second chamber arranged separately, and a first air inlet and a first air outlet communicating with the first chamber. The outdoor heat exchanger is located in the second chamber, and the indoor heat exchanger is located in the first chamber. The first fan is located in the first chamber to drive air to flow through the first air inlet, the indoor heat exchanger, and the first air outlet in sequence. The casing further comprises a defrosting air duct, and the outer side wall of the defrosting air duct is adjacent to or in contact with the outdoor heat exchanger. The defrosting air duct comprises a second air inlet and a second air outlet communicating with the first chamber, so that part of the air flowing through the indoor heat exchanger is driven by the first fan to flow back and forth in the first chamber and the defrosting air duct.

[0006] Optionally, the indoor-outdoor integrated air conditioning unit further comprises a damper assembly, and the damper assembly is installed at least one of the second air inlet and the second air outlet. When the damper assembly is opened, the defrosting air duct is opened. When the damper assembly is closed, the defrosting air duct is closed.

[0007] Optionally, the damper assembly comprises at least two first louvers installed at the second air inlet, and the at least two first louvers are distributed in sequence and rotatably installed at the opening of the second air inlet in the flow direction of the air. When the first louvers are rotated to a first preset position to block the second air inlet and are in a closed state, the damper assembly is closed. When the first louvers are rotated to a second preset position to open the second air inlet and are in an open state, the damper assembly is opened.

[0008] Optionally, the second air inlet in the first chamber is located between the first fan and the first air outlet along the air flow direction. When the plurality of first louvers are in an open state, the first louvers rotate in a direction perpendicular to the second air inlet until the dimension of the first chamber is the depth dimension, and the depth dimension of the first louvers increases sequentially along the air flow direction from the first fan to the first air outlet.

[0009] Optionally, the damper assembly includes at least two second louvers installed at the second air outlet, and the at least two second louvers are distributed in sequence and rotatably installed at the opening of the second air outlet to open or close the second air outlet.

[0010] Optionally, the integrated indoor / outdoor air conditioning unit further includes a first temperature sensor, a second temperature sensor, and a controller. The first temperature sensor is configured to detect the ambient temperature and obtain a first temperature parameter, and the second temperature sensor is configured to detect the temperature of the outdoor heat exchanger and obtain a second temperature parameter. The controller is electrically connected to the first temperature sensor, the second temperature sensor, and the damper assembly, and is configured to control the damper assembly to open or close the defrost air duct based on the first and second temperature parameters.

[0011] Optionally, in the heating condition, when the difference between the first temperature parameter and the second temperature parameter is greater than or equal to the first preset temperature, and the second temperature parameter is less than 0°C, the controller controls the damper assembly to open the defrost air duct.

[0012] Optionally, in the heating condition, when the difference between the first temperature parameter and the second temperature parameter is less than a first preset parameter, or when the second temperature parameter is greater than or equal to 0°C, the controller controls the damper assembly to close the defrost air duct.

[0013] Optionally, the integrated air conditioning unit further includes an electric heater located within the first chamber and upstream of the second air inlet along the air flow direction, and the controller is electrically connected to the electric heater. In heating mode, when the difference between the first temperature parameter and the second temperature parameter is greater than or equal to a second preset temperature, the second preset temperature is greater than the first preset temperature, and the second temperature parameter is less than 0°C, the controller controls the damper assembly to open the defrost air duct, and the controller controls the electric heater to be in an on state.

[0014] Optionally, in the heating condition, when the difference between the first temperature parameter and the second temperature parameter is greater than or equal to the third preset temperature, the third preset temperature is greater than the second preset temperature, and the second temperature parameter is less than 0°C, the controller controls the defrost duct and the electric heater to remain in the on state, and the controller controls the internal and external integrated air-conditioning unit to switch to the air supply condition.

[0015] Optionally, the casing further includes a first partition plate, which is located between the first chamber and the second chamber to separate the first chamber and the second chamber, and the side wall of the defrost air duct includes a portion of the first partition plate.

[0016] Optionally, the outdoor heat exchanger is arranged in the second chamber and in contact with the first partition at the side wall of the defrost air duct.

[0017] Optionally, the second chamber is located above the first chamber.

[0018] Optionally, the first chamber, the defrost air duct and the outdoor heat exchanger are distributed in sequence from bottom to top.

[0019] Optionally, a vertical projection of the outdoor heat exchanger at the first partition and a vertical projection of the defrost air duct at the first partition are arranged to overlap.

[0020] Optionally, in a cross section perpendicular to an extending direction of the defrost air duct, a cross-sectional shape of the defrost air duct includes an arc structure.

[0021] Optionally, in the first chamber, the second air inlet is located between the first fan and the first air outlet along the air flow direction.

[0022] Optionally, in the first chamber, the second air outlet is arranged upstream of the first fan along the flow direction of the air.

[0023] In a second aspect, the present application further provides an air conditioner, comprising the integrated internal and external air conditioning unit in the first aspect.

[0024] The above technical solution provided by the embodiment of the present application has the following advantages compared with the prior art:

[0025] When the indoor heat exchanger is a condenser and the outdoor heat exchanger is an evaporator, the integrated air-conditioning unit is in a heating state. The first fan can drive the air to flow through the first air inlet, the indoor heat exchanger, and the first air outlet in sequence. Since the refrigerant in the heating state liquefies and releases heat in the indoor heat exchanger, the air flowing through the indoor heat exchanger can be heated. Driven by the first fan, part of the hot air flowing through the indoor heat exchanger can flow into the defrost duct through the second air inlet, thereby heating the defrost duct. The hot air flowing into the defrost duct can also flow back into the first chamber through the second air outlet, so that this part of the hot air can flow back and forth between the first chamber and the defrost duct.

[0026] Since the outer wall of the defrost duct is adjacent to or in contact with the outdoor heat exchanger, the hot air flowing through the defrost duct can not only heat the defrost duct, but also radiate or transfer heat to the adjacent outdoor heat exchanger through the side wall of the defrost duct, so as to improve the gasification heat absorption efficiency of the refrigerant in the outdoor heat exchanger.

[0027] That is, in heating mode, the indoor heat exchanger can transfer heat to the outdoor heat exchanger through the defrost duct to slow down or prevent the surface temperature of the outdoor heat exchanger from falling too low, which helps to increase the frosting period of the outdoor heat exchanger. Moreover, even if the surface of the outdoor heat exchanger is already frosted, the indoor heat exchanger and defrost duct can be used to heat and defrost the outdoor heat exchanger without switching to defrost mode (i.e., cooling mode) for defrosting. This not only prevents cold air from leaking or blowing out of the first air outlet, but also allows the indoor air to be heated while the outdoor heat exchanger is being defrosted, providing users with a better user experience in heating mode. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments consistent with the invention and, together with the description, serve to explain the principles of the invention.

[0029] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, for ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative labor.

[0030] One or more embodiments are exemplarily illustrated by pictures in the corresponding drawings. These exemplifications do not constitute limitations on the embodiments. Elements with the same reference numerals in the drawings are represented as similar elements. Unless otherwise stated, the figures in the drawings do not constitute proportional limitations.

[0031] Figure 1 A schematic diagram of the three-dimensional structure of an integrated internal and external air-conditioning unit provided in an embodiment of the present application;

[0032] Figure 2 A schematic diagram of the position structure of the first chamber and the defrost air duct in the integrated internal and external air conditioning unit provided in an embodiment of the present application;

[0033] Figure 3 for Figure 2 The housing shown in the figure includes a three-dimensional structural diagram of a first chamber;

[0034] Figure 4 for Figure 3 An interior side view of the first chamber shown in ;

[0035] Figure 5 A schematic diagram of the connection control of the controller in the internal and external integrated air conditioning unit provided in an embodiment of the present application;

[0036] Figure 6 for Figure 2 A schematic diagram of the internal structure of the first chamber is shown;

[0037] Figure 7 for Figure 6 A top view of the structure;

[0038] Figure 8 A cross-sectional view of an integrated internal and external air conditioning unit provided in an embodiment of the present application;

[0039] Figure 9 for Figure 8 A cross-sectional schematic diagram of the defrost air duct is shown in FIG;

[0040] Figure 10 for Figure 8 A schematic diagram of the positional relationship between the defrost air duct and the outdoor heat exchanger is shown in FIG.

[0041] Description of reference numerals:

[0042] 100. Internal and external integrated air conditioning units;

[0043] 10. Casing; 11. First chamber; 111. First air inlet; 112. First air outlet; 113. Windward chamber; 114. Fan chamber; 115. Air supply duct; 12. Second chamber; 13. Defrost air duct; 131. Second air inlet; 132. Second air outlet; 14. First partition; 15. Second partition;

[0044] 20. Outdoor heat exchanger;

[0045] 30. Indoor heat exchanger;

[0046] 40. First fan;

[0047] 50. Damper assembly; 51. First louver; 52. Second louver;

[0048] 60. Controller; 71. First temperature sensor; 72. Second temperature sensor; 73. Electric heater;

[0049] d. Depth dimension. DETAILED DESCRIPTION

[0050] To make the purpose, technical solutions, and advantages of the embodiments of this application more clear, the technical solutions in the embodiments of this application will be clearly and completely described below in conjunction with the drawings in the embodiments of this application. Obviously, the described embodiments are part of the embodiments of this application, not all of the embodiments. Based on the embodiments in this application, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of this application.

[0051] The disclosure below provides many different embodiments or examples for implementing different configurations of the present invention. To simplify the disclosure of the present invention, the components and configurations of specific examples are described below. Of course, these are merely examples and are not intended to limit the present invention. In addition, the present invention may repeat reference numerals and / or letters in different examples. Such repetition is for the purpose of simplicity and clarity and does not in itself indicate the relationship between the various embodiments and / or configurations discussed.

[0052] For ease of description, spatially relative terms may be used herein to describe the relative position or movement of one element or feature relative to another element or feature as shown in the figures. These relative terms include, for example, "inside," "outside," "inside," "outside," "below," "beneath," "above," "above," "front," "rear," and the like. Such spatially relative terms are intended to encompass different orientations of the device during use or operation in addition to the orientation depicted in the figures. For example, if the device in the figures is flipped, changes position, or changes motion, these directional indications will change accordingly. For example, an element described as "below" or "beneath" another element or feature would subsequently be oriented "above" or "above" the other element or feature. Thus, the example term "below" can encompass both above and below orientations. The device may be oriented differently (rotated 90 degrees or in other orientations), and the spatially relative descriptors used herein should be interpreted accordingly.

[0053] Figure 1 A schematic diagram of the three-dimensional structure of an integrated internal and external air-conditioning unit provided in an embodiment of the present application. Figure 2 This is a schematic diagram of the position structure of the first chamber and the defrost air duct in the integrated internal and external air-conditioning unit provided in an embodiment of the present application. Figure 3 for Figure 2 The casing shown in the figure includes a three-dimensional structural diagram of a first chamber. Figure 4 for Figure 3 An internal side view of the first chamber is shown in . Figure 5 This is a connection control diagram of the controller in the integrated indoor and outdoor air-conditioning unit provided in an embodiment of the present application. Figure 6 for Figure 2 Schematic diagram of the internal structure of the first chamber. Figure 7 for Figure 6 A top view of the structure. Figure 8 A cross-sectional view of an integrated internal and external air conditioning unit provided in an embodiment of the present application. Figure 9 for Figure 8 A cross-sectional schematic diagram of the defrost air duct is shown in FIG. Figure 10 for Figure 8A schematic diagram of the positional relationship between the defrost air duct and the outdoor heat exchanger is shown in FIG.

[0054] See also Figures 1 to 10 The embodiment of the present application provides an integrated indoor and outdoor air conditioning unit 100 to solve the problem that the air conditioner in the heating condition frequently enters the defrosting condition and cannot heat in the defrosting condition.

[0055] The integrated indoor and outdoor air conditioning unit 100 provided in the embodiment of the present application is an air conditioning unit having an integrated structure of indoor and outdoor units. Taking a window air conditioner as an example, the window air conditioner can be installed on a wall or window so that the air inlet and air outlet of the indoor unit are located indoors, and the air inlet and air outlet of the outdoor unit are located outdoors. Alternatively, the integrated indoor and outdoor air conditioning unit 100 can be installed outdoors, and the air inlet and air outlet of the indoor unit can be connected to the indoor room via a pipe so that the indoor air can circulate and exchange heat with the heat exchanger of the indoor unit. This is not limited to this.

[0056] like Figure 1 and Figure 2 As shown, the integrated indoor and outdoor air conditioning unit 100 includes a housing 10, an outdoor heat exchanger 20, an indoor heat exchanger 30, and a first fan 40. The housing 10 includes a first chamber 11 and a second chamber 12, which are separated from each other. The housing 10 also includes a first air inlet 111 and a first air outlet 112 that are connected to the first chamber 11.

[0057] In the casing 10, the outdoor heat exchanger 20 is located in the second chamber 12 as an outdoor unit component, and the indoor heat exchanger 30 is located in the first chamber 11 as an indoor unit component.

[0058] The first and second chambers 11, 12 are isolated from each other and are used to house the indoor and outdoor unit components. The isolated first and second chambers 11, 12 prevent the heat exchange air from the indoor and outdoor units from mixing and interfering with each other. The first and second chambers 11, 12 can be arranged sequentially in a vertical direction, such as with the second chamber 12 located above the first chamber 11. Alternatively, the first and second chambers 11, 12 can be arranged sequentially in a horizontal plane, such as in a left-right or front-to-back direction, without limitation.

[0059] The first fan 40 is located in the first chamber 11 to drive air to flow through the first air inlet 111 , the indoor heat exchanger 30 and the first air outlet 112 in sequence, so as to circulate heat exchange between the indoor air and the indoor heat exchanger 30 .

[0060] Correspondingly, the integrated indoor and outdoor air conditioning unit 100 further includes a second fan, which is located in the second chamber 12 to drive air to flow through the outdoor heat exchanger 20 .

[0061] Among them, the first fan 40 and the second fan can be at least one of an axial flow fan, a centrifugal fan and a diagonal flow fan, and can be flexibly selected based on the requirements of wind pressure, air volume and noise at the indoor heat exchanger 30 and the outdoor heat exchanger 20, without any limitation.

[0062] In addition, an embodiment of the present application further provides an air conditioner, including any one of the integrated indoor and outdoor air conditioning units 100. The air conditioner may include components such as a compressor, a reversing valve, and a throttling device. One end of the indoor heat exchanger 30 is connected to one end of the outdoor heat exchanger 20 via the throttling device, and the other end of the indoor heat exchanger 30 and the other end of the outdoor heat exchanger 20 are connected to the compressor via a reversing valve. The air conditioner including the integrated indoor and outdoor air conditioning unit 100 can switch between heating and cooling modes, thereby heating or cooling the indoor air through the indoor heat exchanger 30 and the first fan 40. When the air conditioner is in the heating mode, the indoor heat exchanger 30 serves as a condenser and the outdoor heat exchanger 20 serves as an evaporator.

[0063] Reference Figure 1 and Figure 2 The housing 10 further includes a defrost duct 13, the outer wall of which is adjacent to or in contact with the outdoor heat exchanger 20. The defrost duct 13 includes a second air inlet 131 and a second air outlet 132 that communicate with the first chamber 11, so that the first fan 40 can drive a portion of the air that has passed through the indoor heat exchanger 30 to flow back and forth between the first chamber 11 and the defrost duct 13.

[0064] Among them, reciprocating flow means that part of the air flowing through the indoor heat exchanger 30 can flow into the defrost duct 13 through the second air inlet 131 under the drive of the first fan 40, and the air flowing into the defrost duct 13 can also flow into the first chamber 11 through the second air outlet 132, thereby realizing the reciprocating flow of this part of the air between the first chamber 11 and the defrost duct 13.

[0065] In this way, when the indoor heat exchanger 30 is a condenser and the outdoor heat exchanger 20 is an evaporator so that the indoor and outdoor integrated air-conditioning unit 100 is in a heating state, the first fan 40 can drive the air to flow through the first air inlet 111, the indoor heat exchanger 30 and the first air outlet 112 in sequence. Since the refrigerant in the heating state liquefies and releases heat in the indoor heat exchanger 30, the air flowing through the indoor heat exchanger 30 can be heated. Driven by the first fan 40, part of the hot air flowing through the indoor heat exchanger 30 can flow into the defrost duct 13 through the second air inlet 131, thereby heating the defrost duct 13, and the hot air flowing into the defrost duct 13 can also flow back to the first chamber 11 through the second air outlet 132, so that the hot air can flow back and forth between the first chamber 11 and the defrost duct 13.

[0066] Since the outer wall of the defrost duct 13 is adjacent to or in contact with the outdoor heat exchanger 20, the hot air flowing through the defrost duct 13 can not only heat the defrost duct 13, but also radiate or transfer heat toward the adjacent outdoor heat exchanger 20 through the side wall of the defrost duct 13, so as to improve the gasification heat absorption efficiency of the refrigerant in the outdoor heat exchanger 20.

[0067] That is, in heating mode, the indoor heat exchanger 30 can transfer heat to the outdoor heat exchanger 20 through the defrost duct 13, thereby slowing down or preventing the surface temperature of the outdoor heat exchanger 20 from being too low, which helps to increase the frosting cycle of the outdoor heat exchanger 20. Furthermore, even if frosting has formed on the surface of the outdoor heat exchanger 20, the indoor heat exchanger 30 and the defrost duct 13 can be used to heat and defrost the outdoor heat exchanger 20 without switching to a defrost mode (i.e., a cooling mode) for defrosting. This not only prevents cold air from leaking or being blown out of the first air outlet 112, but also heats the indoor air while defrosting the outdoor heat exchanger 20, providing a better user experience in heating mode.

[0068] Under the refrigeration condition, there is no need to heat and defrost the outdoor heat exchanger 20 through the defrost duct 13. Figure 3 and Figure 4 As shown, the internal and external integrated air conditioning unit 100 further includes a damper assembly 50, and at least one of the second air inlet 131 and the second air outlet 132 is equipped with a damper assembly 50 to open or close the defrost air duct 13 (refer to Figure 2 ). That is, when the damper assembly 50 is opened, the defrost air duct 13 is opened. When the damper assembly 50 is closed, the defrost air duct 13 is closed.

[0069] For example, a damper assembly 50 may be installed at the second air inlet 131 to control the opening or closing of the second air inlet 131 through the damper assembly 50 , thereby opening or closing the defrost air duct 13 , which has a simple structure.

[0070] The damper assembly 50 may also be installed at the second air outlet 132. By controlling the opening or closing of the second air outlet 132 through the damper assembly 50, the defrost air duct 13 can also be opened or closed, and the structure is simple.

[0071] Alternatively, a damper assembly 50 may be installed at the second air inlet 131 and the second air outlet 132 at the same time, so as to simultaneously control the second air inlet 131 and the second air outlet 132 to be in an open state or a closed state through the damper assembly 50, thereby opening or closing the defrost duct 13 and making the defrost duct 13 have a better sealing effect.

[0072] That is, the opening and closing states of the defrost duct 13 can be controlled by the arrangement of the damper assembly 50. Thus, in heating mode, if the surface temperature of the outdoor heat exchanger 20 is relatively low, the damper assembly 50 can be controlled to open the defrost duct 13, allowing some of the heat from the indoor heat exchanger 30 to be directed to the outdoor heat exchanger 20 through the defrost duct 13. This heats the outdoor heat exchanger 20 in heating mode, thereby defrosting the outdoor heat exchanger 20 or extending the frosting period of the outdoor heat exchanger 20.

[0073] Under heating conditions, if there is no need to heat the outdoor heat exchanger 20, the damper assembly 50 can be controlled to close the defrost duct 13 so that more air flowing through the indoor heat exchanger 30 flows out through the first air outlet 112 to heat the indoor air, thereby achieving higher heating efficiency.

[0074] In the cooling condition, the damper assembly 50 can also be controlled to close the defrost air duct 13 so that more air flowing through the indoor heat exchanger 30 flows out through the first air outlet 112 to cool the indoor air and achieve higher cooling efficiency.

[0075] For example, Figure 3 and Figure 4 As shown, the damper assembly 50 includes at least two first louvers 51 installed at the second air inlet 131. Along the air flow direction, the at least two first louvers 51 are sequentially distributed and rotatably installed at the second air inlet 131 to open or close the second air inlet 131.

[0076] When the first louvers 51 rotate to the first preset position to block the second air inlet 131 and are in a closed state, the damper assembly 50 is closed, and the corresponding defrost air duct 13 is closed. At this time, the first preset position of each first louver 51 is approximately parallel to the opening plane of the second air inlet 131, thereby blocking the second air inlet 131.

[0077] Correspondingly, when the first louver 51 rotates to the second preset position to open the second air inlet 131 and is in the open state, the damper assembly 50 is opened, and the defrost air duct 13 is opened. That is, each first louver 51 rotates from the first preset position to the preset angle. Figure 4 In the second preset position shown, the angle formed by each first louver 51 and the opening plane of the second air inlet 131 is a preset angle, and the opening direction is set toward the first fan 40, and the defrost air duct 13 has been opened.

[0078] By rotating the plurality of first dampers 51 at the second air inlet 131, the second air inlet 131 can be controlled to be in an open state or a closed state by adjusting the rotation angle of the plurality of first dampers 51, which can avoid occupying more additional space in the plane where the second air inlet 131 is located. Moreover, since the plurality of first dampers 51 are sequentially distributed along the flow direction of the air, the depth dimension of each first damper 51 inserted into the first chamber 11 when rotated to the open state is small, that is, the occupied space in the space perpendicular to the second air inlet 131 is small, which is beneficial to the compact design of the device. The plurality is two or more than two.

[0079] Correspondingly, as shown in Figure 4 The damper assembly 50 also includes at least two second dampers 52 installed at the second air outlet 132, which are sequentially distributed and rotatably installed at the opening of the second air outlet 132 to open or close the second air outlet 132.

[0080] By rotating the plurality of second dampers 52 at the second air outlet 132, the second air outlet 132 can be controlled to be in an open state or a closed state by adjusting the rotation angle of the plurality of second dampers 52, which can avoid occupying more additional space in the plane where the second air outlet 132 is located. Moreover, since the plurality of second dampers 52 are sequentially distributed, the depth dimension of each second damper 52 inserted into the first chamber 11 when rotated to the open state is small, that is, the occupied space in the space perpendicular to the second air outlet 132 is small, which is beneficial to the compact design of the device.

[0081] Alternatively, the damper assembly 50 can also include a first damper and a second damper. The first damper is installed at the second air inlet 131 to control the second air inlet 131 to be in an open state or a closed state by sliding or rotating. The second damper is installed at the second air outlet 132 to control the second air outlet 132 to be in an open state or a closed state by sliding or rotating, which is simple in structure.

[0082] As shown in Figure 3 and Figure 4 Along the flow direction of the air, the second air inlet 131 is located between the first fan 40 and the first air outlet 112, so that part of the air blown out by the first fan 40 can flow into the defrost air duct 13 through the second air inlet 131, and another part of the air can be blown out of the first chamber through the first air outlet 112. In order to make more air blown out by the first fan 40 enter the defrost air duct 13 through the second air inlet 131 in the process of flowing to the first air outlet 112.

[0083] In Figure 4Taking the perspective shown as an example, the first louver 51 is rotated counterclockwise by 30-60 degrees (preset angle) from the closed state to the open position shown, so that part of the air blown by the first fan 40 to the first air outlet 112 can be guided to the defrost air duct 13 (as shown in FIG. Figure 2 shown).

[0084] Reference Figure 4 When the first louvers 51 are open, the depth d is defined as the distance that the first louvers 51 rotate in a direction perpendicular to the second air inlet 131 (e.g., vertically) to the first chamber 11. Thus, the depth d of the first louvers 51 increases sequentially along the air flow direction from the first fan 40 to the first air outlet 112.

[0085] Since the plurality of first louvers 51 are sequentially distributed along the air flow direction and rotatably mounted at the second air inlet 131, taking the width dimension of the first louvers 51 along the air flow direction in the closed state as an example, along the air flow direction from the first fan 40 to the first air outlet 112, the width dimensions of the plurality of first louvers 51 are sequentially increased, so that the depth dimension of the first louvers 51 inserted into the first chamber 11 sequentially increases when the first louvers 51 are rotated to the open state.

[0086] In this way, when the second air inlet 131 is in the open state, since the depth dimension of the first louver 51 is larger as it is closer to the first air outlet 112, that is, as the air flows toward the first louver 51 inserted into the first chamber 11, the depth dimension gradually increases, and the obstruction of the upstream first louver 51 on the downstream first louver 51 can be reduced, so that the downstream first louver 51 also has a better airflow introduction effect.

[0087] In some embodiments of the present application, along the air flow direction, the second air outlet 132 in the first chamber 11 is located upstream of the first fan 40. After the operation of the first fan 40, a negative pressure area is formed upstream. By arranging the second air outlet 132 close to the negative pressure area upstream of the first fan 40, a pressure difference is created between the second air inlet 131 and the second air outlet 132 of the defrost duct 13, and the second air outlet 132 forms a negative pressure area, so that the air in the defrost duct 13 can flow from the second air inlet 131 to the second air outlet 132 and heat the sidewalls of the defrost duct 13.

[0088] In addition, since the first louver 51 at the second air inlet 131 forms an angle with the outlet air flow after opening, part of the air blown out by the first fan 40 enters the defrost duct 13. Since the faster the gas flow rate, the lower the pressure, and the slower the gas flow rate, the higher the pressure. In the process of air flowing from the first fan 40 to the first air outlet 112, due to the obstruction of multiple first louvers 51, the air flow rate at the second air inlet 131 is low and the air pressure is high. At the second air outlet 132, the air in the defrost duct 13 can be smoothly inhaled by the first fan 40, with a faster flow rate, so that the air pressure of the defrost duct 13 at the second air outlet 132 is low, and the fan running airflow is sucked into the fan, and because there is no obstruction from any louver-type sealing blades, the gas flow rate is fast and the air pressure is low. This allows the air to flow smoothly from the second air inlet 131 to the second air outlet 132 in the defrost duct 13 , and allows the air to heat the side walls of the defrost duct 13 .

[0089] Due to the principle that hot air rises and cold air falls, the second chamber 12 can be set above the first chamber 11 so that the hot air in the first chamber 11 and the defrost duct 13 under heating conditions can have a better heating effect on the second chamber 12 above, thereby slowing down the frosting process of the indoor heat exchanger 30 in the second chamber 12.

[0090] Alternatively, the first chamber 11, the defrost duct 13, and the second chamber 12 may be arranged in order from bottom to top. For example, the housing 10 may be provided with an interlayer between the first chamber 11 and the second chamber 12, and a portion of the interlayer is hollow to form the defrost duct 13 connected to the first chamber 11. The upper side wall of the defrost duct 13 is the second chamber 12, so that hot air can pass through the upper side wall of the defrost duct 13 to achieve a better heating effect on the second chamber 12. In addition, due to the principle that hot air rises and cold air sinks, the cold air below the second chamber 12 can be heated to improve the uniformity of the overall temperature distribution in the second chamber 12.

[0091] For example, within the second chamber 12, the outdoor heat exchanger 20 is located above the defrost duct 13 and is in contact with the upper side wall of the defrost duct 13. Under heating conditions, the hot air in the defrost duct 13 can contact the outdoor heat exchanger 20 through the upper side wall and exchange heat, thereby achieving high heat exchange efficiency. At the same time, the portion of the upper side wall that is not in contact with the outdoor heat exchanger 20 can heat the surrounding air, causing the heated air to rise and exchange heat with the upper area of ​​the outdoor heat exchanger 20, which is beneficial to improving the uniformity of the overall temperature distribution of the outdoor heat exchanger 20, thereby avoiding or slowing down the occurrence of local low-temperature frost on the surface of the outdoor heat exchanger 20.

[0092] In some embodiments of the present application, Figure 5As shown, the integrated air conditioning unit 100 further includes a controller 60, a first temperature sensor 71, and a second temperature sensor 72. The controller 60 is electrically connected to the first temperature sensor 71, the second temperature sensor 72, and the damper assembly 50. The controller 60 is used to control the damper assembly 50 to open or close the defrost air duct 13 (as shown in FIG. 1 ) according to the difference between the first temperature parameter and the second temperature parameter. Figure 2 shown).

[0093] The first temperature sensor 71 is used to detect the ambient temperature and obtain the first temperature parameter T1. For example, the first temperature sensor 71 is disposed outside the housing 10 of the second chamber 12. Alternatively, the first temperature sensor 71 is located on the air inlet side of the outdoor heat exchanger 20 and spaced apart from the outdoor heat exchanger.

[0094] The second temperature sensor 72 is used to detect the temperature of the outdoor heat exchanger 20 and obtain the second temperature parameter T2. For example, the second temperature sensor 72 is disposed in contact with the outdoor heat exchanger 20. Alternatively, the second temperature sensor 72 is disposed on the air outlet side of the outdoor heat exchanger 20 and is disposed close to the outdoor heat exchanger 20.

[0095] The controller 60, first temperature sensor 71, and second temperature sensor 72 are configured to monitor the ambient temperature and the temperature of the outdoor heat exchanger 20. For example, in cooling mode, the controller controls the damper assembly 50 to close the defrost duct 13, thereby ensuring higher heat exchange efficiency at the indoor heat exchanger 30. In heating mode, if the ambient temperature (external environment) is high or the temperature of the outdoor heat exchanger 20 is above the dew point, the controller 60 similarly controls the damper assembly 50 to close the defrost duct 13, thereby ensuring higher heat exchange efficiency at the indoor heat exchanger 30.

[0096] If the ambient temperature is low or the temperature of the outdoor heat exchanger is lower than the dew point, the controller 60 can control the damper assembly 50 to open the defrost duct 13, so that the indoor heat exchanger 30 in heating mode can heat the outdoor heat exchanger 20 through the defrost duct 13, thereby delaying or preventing the formation of frost on the outdoor heat exchanger 20. Alternatively, the outdoor heat exchanger 20 that has already frosted can be heated and defrosted at this time.

[0097] In this way, by setting the controller 60, the first temperature sensor 71 and the second temperature sensor 72, the opening and closing states of the defrost air duct 13 can be flexibly adjusted as needed to enable the entire machine to maintain a high cooling and heating efficiency.

[0098] For example, the damper assembly 50 includes at least a plurality of first louvers 51. The damper assembly 50 can be driven by a first motor to switch the plurality of first louvers 51 between a closed state and an open state. In this case, the controller 60 is electrically connected to the first motor to control the second air inlet 131 to be in a closed state or an open state.

[0099] Correspondingly, the second motor can also be used to drive the plurality of second louvers 52 to switch between the closed state and the open state to control the second air outlet 132 to be in the closed state or the open state. In this case, the controller 60 is electrically connected to the second motor to control the second air outlet 132 to be in the closed state or the open state.

[0100] The damper assembly 50 can be initially set to a closed state. For example, during the startup self-test process of the integrated air conditioning unit 100, the position of the damper assembly 50 is detected, and the damper assembly 50 is maintained or switched to the initial state to close the defrost air duct 13. When necessary, the damper assembly 50 is controlled by the controller 60 to open the defrost air duct 13.

[0101] Exemplarily, the difference between the first temperature parameter T1 and the second temperature parameter T2 is defined as T1-T2. Since the refrigerant in the outdoor heat exchanger 20 under heating conditions vaporizes and absorbs heat, the temperature of the outdoor heat exchanger 20 will not be higher than the ambient temperature, that is, T1-T2>0°C.

[0102] Based on this, under heating conditions, when the difference between the first temperature parameter T1 and the second temperature parameter T2 is greater than or equal to the first preset temperature T3, and the second temperature parameter T2 is less than 0°C, the controller 60 controls the damper assembly 50 to open the defrost duct 13, which is the first anti-frost mode.

[0103] For example, the first preset temperature T3 can be 2°C, 3°C or 4°C, that is, 2°C≤T3<5°C. Since the temperature of the outdoor heat exchanger 20 is lower than 0°C under heating conditions and the temperature difference between the ambient temperature and the outdoor heat exchanger 20 is greater than or equal to the first preset temperature T3, the surface temperature of the outdoor heat exchanger 20 is lower than the dew point temperature, resulting in frost and ice. The controller 60 controls the damper assembly 50 to open the defrost duct 13, so that part of the air heated by the indoor heat exchanger 30 can heat the outdoor heat exchanger 20 in the second chamber 12 through the defrost duct 13, thereby avoiding frost and ice on the outdoor heat exchanger 20, or delaying the frost or ice time of the outdoor heat exchanger 20. Even if the outdoor heat exchanger 20 is already frosted or iced, by opening the defrost duct 13 under heating conditions, the outdoor heat exchanger 20 in the second chamber 12 can be heated to achieve the defrosting and deicing effect.

[0104] During the above process, the indoor unit side can maintain a stable heating effect, that is, the first fan 40 can drive part of the heated air to be discharged through the first air outlet 112 to continuously heat the indoor air, providing a better user experience.

[0105] Correspondingly, in heating mode, when the difference between the first temperature parameter T1 and the second temperature parameter T2 is less than the first preset temperature T3, it indicates that the outdoor heat exchanger 20 is able to fully exchange heat with the outdoor air. This means that the temperature difference between the outdoor heat exchanger 20 and the ambient temperature is small and will not fall below the dew point, causing frost or ice to form on the surface. Alternatively, when the second temperature parameter T2 is greater than or equal to 0°C, the surface temperature of the outdoor heat exchanger 20 is greater than 0°C.

[0106] In this way, even if there is a large temperature difference between the outdoor heat exchanger 20 and the ambient temperature, condensation will only form on the surface of the outdoor heat exchanger 20, without frost or ice forming. This eliminates the need to open the defrost duct 13 during heating operation, allowing the indoor heat exchanger 30 to maintain high heating efficiency. Therefore, the controller 60 controls the damper assembly 50 to switch to its initial state, closing the defrost duct. This indicates the initial heating mode.

[0107] After the defrost air duct 13 is opened, the operating conditions of the integrated air-conditioning unit 100 can be adjusted accordingly according to the different temperature conditions at the outdoor heat exchanger 20, so that the integrated air-conditioning unit 100 maintains a stable heating effect.

[0108] like Figure 3 and Figure 4 As shown, the integrated air conditioning unit 100 further includes an electric heater 73, which is an auxiliary heater for the air conditioning equipment. The electric heater 73 is located in the first chamber 11 and is arranged upstream of the second air inlet 131 along the air flow direction, so that the air heated by the electric heater can partially flow through the first air outlet 112 and partially flow through the second air inlet 131. Figure 5 , the controller 60 is electrically connected to the electric heater 73.

[0109] Under the heating condition, when the difference between the first temperature parameter T1 and the second temperature parameter T2 is greater than or equal to the second preset temperature T4, the second preset temperature T4 is greater than the first preset temperature T3, and the second temperature parameter T2 is less than 0°C, the controller 60 controls the damper assembly 50 to open the defrost duct 13, and the controller 60 controls the electric heater 73 to be in the on state. This is the second anti-frost mode.

[0110] If the second preset temperature T4 is 5°C ≤ T4 < 9°C, the second preset temperature T4 can be set to 5°C, 6°C, 7°C or 8°C. Since the temperature difference between the outdoor heat exchanger 20 and the ambient temperature is further increased at this time, the electric heater 73 is controlled to be started while the defrost duct 13 is opened, so that the air flowing through the first chamber 11 has a higher temperature. That is, the air in the first chamber 11 can flow through the indoor heat exchanger 30 and the electric heater 73 in sequence to be heated and heated. While improving the heating effect of the indoor air, the air flowing back and forth in the first chamber 11 and the defrost duct 13 has a higher temperature, so as to transfer more heat to the second chamber 12 and the outdoor heat exchanger 20, thereby avoiding frost or freezing on the outdoor heat exchanger 20, or delaying the frost or freezing time of the outdoor heat exchanger 20. Even if the outdoor heat exchanger 20 is frosted or iced, the outdoor heat exchanger 20 in the second chamber 12 can be heated by simultaneously opening the defrost duct 13 and the electric heater 73 under heating conditions to achieve defrosting and deicing effects.

[0111] In the above process, the indoor unit side can improve the heating effect, that is, the first fan 40 can drive part of the heated air to be discharged through the first air outlet 112 to continuously heat the indoor air, providing a better user experience.

[0112] It should be noted that under the above operating conditions, the outdoor heat exchanger 20 is likely to be frozen or about to freeze, which reduces the heat exchange efficiency at the outdoor heat exchanger 20 and correspondingly reduces the heating efficiency of the indoor heat exchanger 30. In this case, by turning on the electric heater 73 to supplementally heat the air in the first chamber 11, while ensuring a high heating effect on the indoor air, more heat can be provided to the outdoor heat exchanger 20 through the defrost duct 13.

[0113] However, if the temperature of the outdoor heat exchanger 20 continues to decrease under the above working conditions, the heating effect of the outdoor heat exchanger 20 needs to be increased.

[0114] That is, in the heating mode, when the difference between the first temperature parameter T1 and the second temperature parameter T2 is greater than or equal to the third preset temperature T5, the third preset temperature T5 is greater than the second preset temperature T4, and the second temperature parameter T2 is less than 0°C, the controller 60 controls the defrost air duct 13 and the electric heater 73 to remain in the open state, and the controller 60 controls the integrated air conditioning unit 100 to switch to the air supply mode, which is the defrost mode.

[0115] like Figure 5 As shown, the controller 60 is electrically connected to the first fan 40. The controller 60 can also be electrically connected to the compressor and the throttling device to facilitate switching the operating conditions of the integrated air conditioning unit 100.

[0116] If the third preset temperature T5 is set to 9°C ≤ T5 < 11°C, the third preset temperature T5 can be set to 10°C. Since the temperature difference between the outdoor heat exchanger 20 and the ambient temperature further increases, and frost adheres to the surface of the outdoor heat exchanger 20, the heat exchange efficiency of the outdoor heat exchanger 20 and the heating efficiency of the indoor heat exchanger 30 will be reduced. While maintaining the defrost duct 13 and the electric heater 73 in the open state, the integrated air conditioning unit 100 is switched to the air supply mode, that is, the compressor is stopped and the first fan 40 is running.

[0117] In the air supply mode, the closed compressor prevents the refrigerant from continuing to circulate between the indoor heat exchanger 30 and the outdoor heat exchanger 20, thereby preventing the outdoor heat exchanger 20 from continuing to absorb heat through the vaporization of the refrigerant and causing increased frost. At the same time, the first fan 40, the electric heater 73, and the defrost duct 13 that remain turned on can continue to heat the air flowing through the first chamber 11, so that the heated air can continue to flow through the defrost duct 13 to heat the outdoor heat exchanger 20 and heat the indoor space. Since there is no cold source at the outdoor heat exchanger 20, the frost on the surface of the outdoor heat exchanger 20 can be quickly heated and melted to save defrosting time and continue to output hot air to the indoor space.

[0118] In some embodiments of the present application, Figure 2 As shown, the first chamber 11 includes a windward chamber 113 and a fan chamber 114. The indoor heat exchanger 30 is disposed in the first chamber 11 to separate the first chamber 11 into the windward chamber 113 and the fan chamber 114. Figure 6 and Figure 7 The casing 10 is provided with a first air inlet 111 on the side wall of the windward cavity 113, and the casing 10 is provided with a first air outlet 112 on the side wall of the fan cavity 114. A first fan 40 is installed in the fan cavity 114, so that the first fan 40 can drive the air to flow through the first air inlet 111, the windward cavity 113, the indoor heat exchanger 30 and the fan cavity 114 in sequence, and be discharged from the first air outlet 112, so that the heat-exchanged air is blown into the room through the first air outlet 112.

[0119] For example, Figure 6 and Figure 7 As shown, the first fan 40 can be a centrifugal fan, which has the advantages of being small in size and delivering a large air volume. Within the fan chamber 114, the exhaust port of the first fan 40 is positioned toward the first air outlet 112. An air supply channel 115, isolated from the fan chamber 114, is provided between the exhaust port of the first fan 40 and the first air outlet 112. Specifically, one end of the air supply channel 115 is connected to the exhaust port of the first fan 40, and the other end of the air supply channel 115 is connected to the first air outlet 112. This prevents convection between the air blown out by the first fan 40 and the air flowing into the fan chamber 114 through the indoor heat exchanger 30.

[0120] Among them, since the first chamber 11 and the second chamber 12 are distributed in the up and down directions, the second air inlet 131 is opened at the upper side wall of the air supply channel 115, so that when the multiple first louvers 51 are rotated to the open position, the upper part of the air blown out by the first fan 40 flows into the defrost duct 13 through the first louver 51 and the second air inlet 131 to heat the side wall of the defrost duct 13, and heat the second chamber 12 above the defrost duct 13 and the outdoor heat exchanger 20, that is, the first anti-frost mode.

[0121] Correspondingly, the electric heater 73 can be arranged in the air supply channel 115, and the electric heater 73 is located between the first fan 40 and the second air inlet 131 along the air flow direction, so that part of the air heated by the electric heater 73 can flow into the defrost duct 13 through the second air inlet 131, that is, the second anti-frost mode or defrost mode.

[0122] For example, if the first fan 40 is a centrifugal fan, the exhaust port of the first fan 40 is positioned toward the first air outlet 112. The first fan 40 also has two air inlets along the axial direction, one of which faces the indoor heat exchanger 30, and a second air outlet 132 is positioned above the other air inlet. Specifically, within the first chamber 11, the second air outlet 132 is positioned upstream of the first fan 40 in the direction of air flow. Alternatively, the second air outlet 132 can be positioned between the indoor heat exchanger 30 and the first fan 40 in the direction of air flow. This allows the first fan 40 to simultaneously drive the hot air within the defrost duct 13 into the first chamber 11 through the second air outlet 132.

[0123] In some embodiments of the present application, the housing 10 is provided with an interlayer between the first chamber 11 and the second chamber 12. Figure 8 As shown, the casing 10 further includes a first partition 14 , which is located between the first chamber 11 and the second chamber 12 to separate the first chamber 11 and the second chamber 12 , and the side wall of the defrost air duct 13 includes a portion of the first partition 14 .

[0124] Taking the second chamber 12 located above the first chamber 11 as an example, refer to Figure 8 and Figure 9 Part of the first partition 14 serves as a side wall of the defrost air duct 13 to enclose the defrost air duct 13, and this part of the first partition 14 serves as an upper side wall of the defrost air duct 13. That is, heat transfer is performed between the defrost air duct 13 and the second chamber 12 through the first partition 14.

[0125] The first partition 14 not only separates the first chamber 11 and the second chamber 12, but also serves as a partial side wall of the defrost duct 13. It has a compact structure and helps to reduce the heat transfer path between the defrost duct 13 and the second chamber 12, so as to improve the heating and defrosting efficiency of the outdoor heat exchanger 20.

[0126] Based on this, the extension direction of the defrost duct 13 is adjusted to be consistent with the extension direction of the outdoor heat exchanger 20 in the second chamber 12. For example, the vertical projection of the outdoor heat exchanger 20 at the first partition 14 overlaps with the vertical projection of the defrost duct 13 at the first partition 14. This allows the hot air in the defrost duct 13 to better heat the outdoor heat exchanger 20, preventing frost from forming on the surface of the outdoor heat exchanger 20, or heating and melting frost on the surface.

[0127] In some embodiments of the present application, Figure 8 and Figure 10 As shown, the outdoor heat exchanger 20 is disposed in the second chamber 12 and in contact with the first partition 14 at the side wall of the defrost duct 13. This allows the hot air in the defrost duct 13 to directly pass through the first partition 14 as a side wall and conduct the heat to the outdoor heat exchanger 20 above, thereby improving the heat transfer efficiency between the defrost duct 13 and the outdoor heat exchanger 20.

[0128] Among them, such as Figure 9 and Figure 10 As shown, in a cross section perpendicular to the extension direction of the defrost duct 13, the cross-sectional shape of the defrost duct 13 includes an inner curved surface. Since the first partition 14 is a planar structure and serves as part of the side wall of the defrost duct 13, another portion of the side wall of the defrost duct 13 can be configured as a curved surface structure, that is, the cross-sectional shape is an elliptical arc or a circular arc structure. While increasing the inner wall area of ​​the defrost duct 13, the curved surface structure helps reduce air resistance, allowing hot air to flow smoothly in the defrost duct 13 with less noise.

[0129] The larger inner wall area of ​​the defrost duct 13 is conducive to improving the heat exchange efficiency between the hot air and the side walls of the defrost duct 13. The side walls of the defrost duct 13 can be made of a metal sheet structure or other alloys or polymer materials with good thermal conductivity, so as to achieve a higher heat exchange efficiency between the defrost duct 13 and the outdoor heat exchanger 20.

[0130] In some embodiments of the present application, Figure 8As shown, the housing 10 further includes a second partition 15, which is located on the side of the first partition 14 facing the first chamber 11. The first partition 14 and the second partition 15 are spaced apart to form a sandwich structure and separate the first chamber 11 from the second chamber 12. A hollow structure may be provided between the first partition 14 and the second partition 15 to isolate heat transfer between the first chamber 11 and the second chamber 12 through air. Alternatively, a foam material or a thermal insulation material may be filled between the first partition 14 and the second partition 15 to isolate heat transfer between the first chamber 11 and the second chamber 12 while preventing noise from moving components such as the compressor and the second fan in the second chamber 12 from being transmitted to the first chamber 11.

[0131] The defrost duct 13 is disposed between the first partition 14 and the second partition 15. The main structure of the defrost duct 13 is disposed close to the first partition 14, and part of the first partition 14 serves as the side wall structure of the defrost duct 13 to improve the heat exchange efficiency between the hot air in the defrost duct 13 and the outdoor heat exchanger 20.

[0132] Correspondingly, the defrost duct 13 is arranged close to the second partition plate 15 at both ends, so that the second partition plate 15 is provided with a second air inlet 131 and a second air outlet 132 to connect the first chamber 11 and the defrost duct 13 .

[0133] Among them, at the second air inlet 131, an avoidance gap needs to be set at the air supply channel 115 corresponding to the second air inlet 131, so that the hot air heated by the electric heater 73 in the air supply channel 115 can flow into the defrost duct 13 through the avoidance gap and the second air inlet 131 to heat the outdoor heat exchanger 20.

[0134] It should be understood that the terms used herein are for the purpose of describing specific example embodiments only and are not intended to be limiting. Unless the context clearly indicates otherwise, the singular forms "one", "an" and "said" as used herein may also be meant to include plural forms. The terms "comprise", "include", "contain" and "have" are inclusive and therefore specify the presence of stated features, steps, operations, elements and / or parts, but do not exclude the presence or addition of one or more other features, steps, operations, elements, parts, and / or combinations thereof. The method steps, processes, and operations described herein are not to be construed as necessarily requiring them to be performed in the specific order described or illustrated, unless the order of execution is clearly indicated. It should also be understood that additional or alternative steps may be used.

[0135] Although the terms first, second, third, etc. can be used in the text to describe multiple elements, components, regions, layers and / or sections, these elements, components, regions, layers and / or sections should not be limited by these terms. These terms can only be used to distinguish an element, component, region, layer or section from another region, layer or section. Unless the context clearly indicates otherwise, terms such as "first", "second" and other numerical terms do not imply order or sequence when used in the text. Therefore, the first element, component, region, layer or section discussed below can be referred to as the second element, component, region, layer or section without departing from the teaching of the example embodiments.

[0136] The foregoing description is intended only to provide specific embodiments of the present invention, which will enable those skilled in the art to understand and implement the present invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the present invention. Therefore, the present invention is not intended to be limited to the embodiments shown herein, but is intended to be accorded the widest scope consistent with the principles and novel features claimed herein.

Claims

1. An integrated internal and external air conditioning unit, characterized in that: include: A casing (10), the casing (10) comprising a first chamber (11) and a second chamber (12) that are separated from each other, and a first air inlet (111) and a first air outlet (112) that are in communication with the first chamber (11); an outdoor heat exchanger (20), located in the second chamber (12); an indoor heat exchanger (30), located in the first chamber (11); and a first fan (40), the first fan (40) being located in the first chamber (11) to drive air to flow sequentially through the first air inlet (111), the indoor heat exchanger (30), and the first air outlet (112); The housing (10) further comprises a defrost duct (13), an outer side wall of the defrost duct (13) being adjacent to or in contact with the outdoor heat exchanger (20); the defrost duct (13) comprises a second air inlet (131) and a second air outlet (132) communicating with the first chamber (11), so that the first fan (40) drives part of the air flowing through the indoor heat exchanger (30) to flow back and forth in the first chamber (11) and the defrost duct (13); In the first chamber (11), the second air inlet (131) is located between the first fan (40) and the first air outlet (112) along the air flow direction, and the second air outlet (132) is arranged upstream of the first fan (40) along the air flow direction.

2. The integrated air conditioning unit according to claim 1, characterized in that: The internal and external integrated air conditioning unit further comprises: The damper assembly (50) is installed at at least one of the second air inlet (131) and the second air outlet (132); when the damper assembly (50) is opened, the defrost air duct (13) is opened; when the damper assembly (50) is closed, the defrost air duct (13) is closed.

3. The integrated internal and external air conditioning unit according to claim 2, characterized in that: The damper assembly (50) comprises: at least two first louvers (51) installed at the second air inlet (131); Along the air flow direction, at least two of the first louvers (51) are sequentially distributed and rotatably mounted at the opening of the second air inlet (131); when the first louver (51) is rotated to a first preset position to block the second air inlet (131) and is in a closed state, the damper assembly (50) is closed; when the first louver (51) is rotated to a second preset position to open the second air inlet (131) and is in an open state, the damper assembly (50) is opened.

4. The integrated internal and external air conditioning unit according to claim 3, characterized in that: Along the flow direction of air, the second air inlet (131) in the first chamber (11) is located between the first fan (40) and the first air outlet (112); When the plurality of first louvers (51) are in an open state, the first louvers (51) rotate in a direction perpendicular to the second air inlet (131) until the dimension of the first chamber (11) is the depth dimension, and the depth dimension of the first louvers (51) increases sequentially along the flow direction of air from the first fan (40) to the first air outlet (112).

5. The integrated internal and external air conditioning unit according to claim 2, characterized in that: The damper assembly (50) comprises at least two second louvers (52) installed at the second air outlet (132), and the at least two second louvers (52) are sequentially distributed and rotatably installed at the opening of the second air outlet (132) to open or close the second air outlet (132).

6. The integrated internal and external air conditioning unit according to claim 2, characterized in that: The internal and external integrated air conditioning unit further comprises: A first temperature sensor (71), used to detect the ambient temperature and obtain a first temperature parameter; a second temperature sensor (72) for detecting the temperature of the outdoor heat exchanger (20) and obtaining a second temperature parameter; and a controller (60), wherein the controller (60) is electrically connected to the first temperature sensor (71), the second temperature sensor (72) and the damper assembly (50), and the controller (60) is used to control the damper assembly (50) to open or close the defrost air duct (13) according to the first temperature parameter and the second temperature parameter.

7. The integrated internal and external air conditioning unit according to claim 6, characterized in that: In a heating condition, when the difference between the first temperature parameter and the second temperature parameter is greater than or equal to a first preset temperature, and the second temperature parameter is less than 0° C., the controller (60) controls the damper assembly (50) to open the defrost air duct (13); In a heating condition, when the difference between the first temperature parameter and the second temperature parameter is less than a first preset temperature, or when the second temperature parameter is greater than or equal to 0° C., the controller (60) controls the damper assembly (50) to close the defrost air duct (13).

8. The integrated internal and external air conditioning unit according to claim 7, characterized in that: The integrated indoor and outdoor air conditioning unit further includes an electric heater (73), the electric heater (73) being located in the first chamber (11) and arranged upstream of the second air inlet (131) along the air flow direction, and the controller (60) being electrically connected to the electric heater (73); In the heating condition, when the difference between the first temperature parameter and the second temperature parameter is greater than or equal to the second preset temperature, the second preset temperature is greater than the first preset temperature, and the second temperature parameter is less than 0°C, the controller (60) controls the damper assembly (50) to open the defrost air duct (13), and the controller (60) controls the electric heater (73) to be in an on state.

9. The integrated internal and external air conditioning unit according to claim 8, characterized in that: In the heating condition, when the difference between the first temperature parameter and the second temperature parameter is greater than or equal to a third preset temperature, the third preset temperature is greater than the second preset temperature, and the second temperature parameter is less than 0°C, the controller (60) controls the defrost duct (13) and the electric heater (73) to remain in an open state, and the controller (60) controls the internal and external integrated air-conditioning unit to switch to the air supply condition.

10. The internal and external integrated air conditioning unit according to any one of claims 1 to 9, characterized in that: The housing (10) further comprises: A first partition (14) is located between the first chamber (11) and the second chamber (12) to separate the first chamber (11) and the second chamber (12), and a side wall of the defrost air duct (13) includes a portion of the first partition (14).

11. The integrated internal and external air conditioning unit according to claim 10, characterized in that: The outdoor heat exchanger (20) is disposed in the second chamber (12) and in contact with the first partition (14) at the side wall of the defrosting air duct (13); and / or, The second chamber (12) is located above the first chamber (11); and / or, The first chamber (11), the defrosting air duct (13) and the outdoor heat exchanger (20) are distributed in sequence from bottom to top.

12. The integrated internal and external air conditioning unit according to claim 10, characterized in that: The vertical projection of the outdoor heat exchanger (20) at the first partition (14) and the vertical projection of the defrost air duct (13) at the first partition (14) are arranged to overlap; And / or, in a cross section perpendicular to the extension direction of the defrost air duct (13), the cross-sectional shape of the defrost air duct (13) includes an arc structure.

13. An air conditioner, characterized in that: It comprises an integrated internal and external air conditioning unit as described in any one of claims 1-12.

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