Indoor heat exchange structure and air conditioning system

Abstract

The present disclosure relates to an indoor heat exchange structure and an air conditioning system. The indoor heat exchange structure for the air conditioning system comprises: an air duct assembly having an air duct and an air outlet communicating with the air duct; a fan arranged in the air duct; and an indoor heat exchanger group arranged in the air duct and located between the air outlet and the air exhaust end of the fan, configured to exchange heat with the airflow flowing through the indoor heat exchanger group; wherein the indoor heat exchanger group comprises a first indoor heat exchanger, a second indoor heat exchanger and a first water pan, the first indoor heat exchanger is located on the upper side of the second indoor heat exchanger, the first indoor heat exchanger is configured to cool and dehumidify the airflow discharged from the air exhaust end of the fan in the dehumidification mode of the air conditioning system, the second indoor heat exchanger is configured to heat the airflow discharged from the air exhaust end of the fan in the dehumidification mode of the air conditioning system, and the first water pan is located between the first indoor heat exchanger and the second indoor heat exchanger and is configured to receive the condensed water of the first indoor heat exchanger.

Description

TECHNICAL FIELD

[0001] The present disclosure relates to the technical field of air conditioning, and in particular, to an indoor heat exchange structure and an air conditioning system. BACKGROUND

[0002] With the improvement of living standards, people's requirements for air conditioners are no longer simply cooling and heating, but have multiple comfort needs, such as temperature control and dehumidification, heating without dryness, etc. For the demand of temperature control and dehumidification, some related technologies adopt an upper and lower arrangement structure of the heat recovery heat exchanger and the dehumidification heat exchanger, so that the indoor return air flows through the heat recovery heat exchanger and the dehumidification heat exchanger respectively and then converges to the outlet air. SUMMARY

[0003] The inventor has found that, in the related technology, when the fan blows the indoor return air to the heat recovery heat exchanger and the dehumidification heat exchanger, the relatively hot airflow flowing through the heat recovery heat exchanger flows upward, and the relatively cold airflow flowing through the dehumidification heat exchanger flows downward, thereby causing natural separation of the cold and hot airflows. At this time, the airflows can be mixed only with the help of a wind guide structure, otherwise the outlet air will be hot at the top and cold at the bottom, making the user feel that the temperature is too low when using the temperature control and dehumidification mode, and not comfortable.

[0004] Therefore, the present disclosure provides an indoor heat exchange structure and an air conditioning system, which can improve the comfort level in the dehumidification mode.

[0005] In one aspect of the present disclosure, an indoor heat exchange structure for an air conditioning system is provided, comprising:

[0006] an air duct assembly having an air duct and an air outlet communicating with the air duct;

[0007] a fan arranged in the air duct; and

[0008] an indoor heat exchanger group arranged in the air duct and located between the air outlet and the air outlet end of the fan, configured to exchange heat with the airflow flowing through the indoor heat exchanger group;

[0009] The indoor heat exchanger group comprises a first indoor heat exchanger, a second indoor heat exchanger and a first water pan. The first indoor heat exchanger is located on the upper side of the second indoor heat exchanger. The first indoor heat exchanger is configured to cool and dehumidify the airflow discharged from the air outlet end of the fan in the dehumidification mode of the air conditioning system. The second indoor heat exchanger is configured to heat the airflow discharged from the air outlet end of the fan in the dehumidification mode of the air conditioning system. The first water pan is located between the first indoor heat exchanger and the second indoor heat exchanger and is configured to receive the condensed water of the first indoor heat exchanger.

[0010] In some embodiments, in the first direction, a maximum length of the first water pan is greater than a maximum length of the first indoor heat exchanger and a maximum length of the second indoor heat exchanger, respectively, wherein the first direction is parallel to an intersection line of an extension plane of a windward surface of the first indoor heat exchanger and an extension plane of a windward surface of the second indoor heat exchanger.

[0011] In some embodiments, in the first direction, at least one of two ends of the first water pan protrudes relative to the first indoor heat exchanger and the second indoor heat exchanger.

[0012] In some embodiments, in the first direction, a length n1 by which a first end of the first water pan protrudes relative to the first indoor heat exchanger and the second indoor heat exchanger satisfies: 1mm < n1 < 30mm, and a length n2 by which a second end of the first water pan protrudes relative to the first indoor heat exchanger and the second indoor heat exchanger satisfies: 1mm < n2 < 30mm.

[0013] In some embodiments, in a vertical direction, a minimum distance h between the second indoor heat exchanger and the first water pan satisfies: 0mm < h < 30mm.

[0014] In some embodiments, in the first direction, a cross section of the first water pan is in a V shape or an upside-down trapezoid shape with an open top, the first water pan comprising a first side wall adjacent to the fan and a second side wall located on a side of the first side wall away from the fan, wherein the first direction is parallel to an intersection line of an extension plane of a windward surface of the first indoor heat exchanger and an extension plane of a windward surface of the second indoor heat exchanger.

[0015] In some embodiments, a height n3 of the first side wall satisfies: 10mm < n3 < 30mm, and a height n4 of the second side wall satisfies: 10mm < n4 < 30mm.

[0016] In some embodiments, an included angle n5 of the first side wall and the second side wall satisfies: 60° < n5 < 150°.

[0017] In some embodiments, a bottom end of the first indoor heat exchanger is located between the first side wall and the second side wall.

[0018] In some embodiments, in a vertical direction, a distance L between a bottom of the first water pan and the first indoor heat exchanger satisfies: L < n3; and / or L < n4.

[0019] In some embodiments, the first water pan has a cross-sectional shape of an inverted trapezoid with an open top, and the first water pan further includes a bottom plate connected to both the first sidewall and the second sidewall, and the maximum dimension n6 of the bottom plate in a direction perpendicular to the first direction satisfies: 0mm < n6 < 30mm.

[0020] In some embodiments, the bottom end of the first indoor heat exchanger is opposite to the top end of the second indoor heat exchanger in the vertical direction, and the included angle between the windward surface of the first indoor heat exchanger and the windward surface of the second indoor heat exchanger is less than 180°.

[0021] In some embodiments, the indoor heat exchanger group further includes:

[0022] A second water pan is located on the lower side of the second indoor heat exchanger and is configured to receive the condensed water flowing out of the first water pan.

[0023] In some embodiments, the second water pan has an inclined sidewall adjacent to the air outlet for guiding the airflow passing through the second indoor heat exchanger to flow towards the air outlet.

[0024] In some embodiments, the ratio P1 of the inner heat exchange area of the heat exchange tube in the first indoor heat exchanger to the inner heat exchange area of the heat exchange tube in the second indoor heat exchanger satisfies: 0.3 ≤ P1 ≤ 0.8; and the ratio P2 of the outer heat exchange area of the heat exchange tube in the first indoor heat exchanger to the outer heat exchange area of the heat exchange tube in the second indoor heat exchanger satisfies: 0.3 ≤ P2 ≤ 0.8.

[0025] In one aspect of the present disclosure, an air conditioning system is provided, comprising: the aforementioned indoor heat exchange structure.

[0026] In some embodiments, the air conditioning system is a ducted air conditioner system.

[0027] Therefore, according to the embodiments of the present disclosure, by locating the first indoor heat exchanger for cooling and dehumidifying the airflow discharged by the fan in the dehumidification mode of the air conditioning system on the upper side of the second indoor heat exchanger for heating the airflow discharged by the fan in the dehumidification mode of the air conditioning system, the airflow after cooling and dehumidification is located above the airflow after heating, and directly contacts and exchanges heat with the lighter and upward floating heated airflow under the action of gravity, realizing the convergence of the cold and hot airflows in the height direction, so that the temperature and humidity are more moderate; and the first water pan is arranged between the first indoor heat exchanger and the second indoor heat exchanger to receive the condensed water of the indoor heat exchanger, which can reduce or avoid the condensed water generated in the dehumidification process from falling on the second indoor heat exchanger to affect the action of the heated airflow, thereby making the user more comfortable in the dehumidification mode of the air conditioning system. BRIEF DESCRIPTION OF DRAWINGS

[0028] The accompanying drawings, which form a part of the specification, illustrate embodiments of the present disclosure and, together with the description, serve to explain the principles of the present disclosure.

[0029] The present disclosure can be more clearly understood and appreciated from the following detailed description, taken in conjunction with the following drawings of which:

[0030] Figure 1 is a structural schematic diagram of some embodiments of the indoor heat exchange structure according to the present disclosure;

[0031] Figure 2 is Figure 1 a technical principle schematic diagram of the embodiments;

[0032] Figures 3-5 are size schematic diagrams of some embodiments of the indoor heat exchange structure according to the present disclosure, respectively.

[0033] It should be understood that the dimensions of the various parts shown in the drawings are not drawn to scale. In addition, the same or similar reference numerals are used to represent the same or similar components. DETAILED DESCRIPTION

[0034] Various exemplary embodiments of the present disclosure will now be described in detail with reference to the accompanying drawings. The description of the exemplary embodiments is merely illustrative in nature and is in no way intended to limit the disclosure, its application or uses. The present disclosure can be implemented in numerous different forms, not limited to the embodiments described herein. These embodiments are provided so that this disclosure will be thorough and complete, and fully convey the scope of the present disclosure to those skilled in the art. It should be noted that the relative arrangement of the components and steps set forth in these embodiments, the components of the materials, numerical expressions, and numerical values are to be interpreted as merely exemplary, rather than as a limitation unless otherwise specifically stated.

[0035] The "first", "second", and similar words used in the present disclosure do not represent any order, number or importance, but are only used to distinguish different parts. "Include" or "contain" and similar words mean that the elements before the word cover the elements listed after the word, and do not exclude the possibility of also covering other elements. "Up", "down", "left", "right" and the like are only used to represent relative positional relationships, which may also change accordingly when the absolute position of the described object changes.

[0036] In the present disclosure, when it is described that a specific device is located between a first device and a second device, there can be an intervening device between the specific device and the first device or the second device, or there can be no intervening device. When it is described that a specific device is connected to other devices, the specific device can be directly connected to the other devices without an intervening device, or can not be directly connected to the other devices with an intervening device.

[0037] All terms used in the present disclosure, including technical or scientific terms, have the same meanings as those understood by those skilled in the art to which the present disclosure pertains, unless otherwise specifically defined. It should also be understood that terms, such as those defined in commonly used dictionaries, should be interpreted as having a meaning that is consistent with their meaning in the context of the relevant art and not in an idealized or overly formal sense unless expressly so defined herein.

[0038] Techniques, methods, and apparatus known to those of ordinary skill in the relevant art can not be discussed in detail herein, but should be considered as part of the description unless otherwise noted in context.

[0039] Figure 1 is a structural schematic diagram of some embodiments of the indoor heat exchange structure according to the present disclosure. Figure 2 is Figure 1 is a technical principle schematic diagram of the embodiments. Referring to Figure 1 and Figure 2 , the present disclosure provides an indoor heat exchange structure for an air conditioning system. The indoor heat exchange structure comprises an air duct assembly 1, a fan 2, and an indoor heat exchanger group 3. The air duct assembly 1 has an air duct 11 and an air outlet 12 communicating with the air duct 11. The fan 2 is arranged in the air duct 11. The air duct 11 can also include an air return port, and the air suction port of the fan 2 can communicate with the air return port of the air duct 11. The fan 2 can adopt a cross-flow fan, or other forms of fan.

[0040] The indoor heat exchanger group 3 is arranged in the air duct 11 and located between the air exhaust end 21 of the fan 2 and the air outlet 12, and is configured to exchange heat with the airflow flowing through the indoor heat exchanger group 3.

[0041] The indoor heat exchanger group 3 includes a first indoor heat exchanger 31, a second indoor heat exchanger 32, and a first water pan 33. In some embodiments, the first indoor heat exchanger 31 and the second indoor heat exchanger 32 can include, but are not limited to, a finned tube heat exchanger.

[0042] The first indoor heat exchanger 31 is located on the upper side of the second indoor heat exchanger 32, and the first indoor heat exchanger 31 is configured to cool and dehumidify the airflow discharged from the air exhaust end 21 of the fan 2 in the dehumidification mode of the air conditioning system. The second indoor heat exchanger 32 is configured to heat the airflow discharged from the air exhaust end 21 of the fan 2 in the dehumidification mode of the air conditioning system.

[0043] In the dehumidification mode of the air conditioning system, the first indoor heat exchanger 31 can be used as a dehumidification heat exchanger to exchange heat with the air flow discharged by the fan 2, so that the air flow is cooled to relatively dry cold air, and the second indoor heat exchanger 32 can be used as a heat recovery heat exchanger to exchange heat with the air flow discharged by the fan 2, so that the air flow is heated to a relatively high temperature air flow.

[0044] For example, in some embodiments, the first indoor heat exchanger 31 and the second indoor heat exchanger 32 are in series in the refrigerant circuit formed by the air conditioning system, and the second indoor heat exchanger 32 is used as a condenser to release heat, and the first indoor heat exchanger 31 is used as an evaporator to absorb heat, thereby realizing the temperature control and dehumidification function of the air conditioning system.

[0045] Reference Figure 2 According to the technical principle shown, when the air conditioning system adopts the dehumidification mode, a part of the air flow f1 (solid line segment with large arrow) discharged by the exhaust end 21 of the fan 2 flows through the first indoor heat exchanger 31 and exchanges heat with the first indoor heat exchanger 31. A part of the air flow f1 flows through the second indoor heat exchanger 32 and exchanges heat with the second indoor heat exchanger 32. The air flow f2 (solid line segment with small arrow) that flows through the first indoor heat exchanger 31 and is cooled and dehumidified moves downward when it is discharged from the air outlet 12 due to the guiding effect of the air duct and the action of gravity, and the air flow f3 (dashed line segment with small arrow) that flows through the second indoor heat exchanger 32 and is heated floats upward when it is discharged from the air outlet 12 due to the smaller density of the hot air flow, thereby mixing with the cooler air flow f2, thereby realizing the mixing of cold and hot and dry and wet, and further obtaining an air flow with more balanced temperature and humidity, effectively improving the air outlet comfort.

[0046] In Figure 1 , the first water pan 33 is located between the first indoor heat exchanger 31 and the second indoor heat exchanger 32 and is configured to receive the condensed water of the first indoor heat exchanger 31. Since the first indoor heat exchanger 31 will produce condensed water when cooling and dehumidifying the air flow, the condensed water flowing onto the second indoor heat exchanger 32 under the action of gravity will affect the heating effect of the second indoor heat exchanger 32 on the air flow. Therefore, by receiving the condensed water of the first indoor heat exchanger 31 through the first water pan 33 located on the upper side of the second indoor heat exchanger 32, the condensed water produced during the dehumidification process can be reduced or avoided from falling onto the second indoor heat exchanger and affecting its heating effect on the air flow, thereby making the air conditioning system more comfortable for users in the dehumidification mode.

[0047] Reference Figure 1 and Figure 2In some embodiments, the indoor heat exchanger group 3 further comprises a second water collecting tray 34. The second water collecting tray 34 is located at the lower side of the second indoor heat exchanger 32 and is configured to receive the condensed water flowing out of the first water collecting tray 33. The second water collecting tray 34 can receive the condensed water flowing out of at least one end of the first water collecting tray 33 in the length direction and falling down, or receive the condensed water flowing through the flow channel arranged between the first water collecting tray 33 and the second water collecting tray 34, so as to avoid the overflow of the condensed water in the first water collecting tray 33 affecting the operation of the second indoor heat exchanger 32.

[0048] In order to assist the flow of the air flow f3 through the second indoor heat exchanger 32, with reference to Figure 1 In some embodiments, the second water collecting tray 34 has an inclined side wall 341 adjacent to the air outlet 12. The inclined side wall 341 can be used to guide the air flow through the second indoor heat exchanger 32 to flow towards the air outlet 12.

[0049] With reference to Figure 1 In some embodiments, the bottom end of the first indoor heat exchanger 31 is opposite to the top end of the second indoor heat exchanger 32 in the vertical direction, and the included angle between the windward surface of the first indoor heat exchanger 31 and the windward surface of the second indoor heat exchanger 32 is less than 180°, and in Figure 1 In some embodiments, the first indoor heat exchanger 31 and the second indoor heat exchanger 32 can be substantially in the shape of “>”. This shape is more consistent with the air field of the air flow discharged from the air outlet end 21 of the fan 2, so that the air flow uniformity in the height direction is better, and the heat exchange difference of the U-shaped heat exchange pipes at different heights in the heat exchanger is reduced.

[0050] Figures 3-5 are respectively schematic diagrams of the dimensions of some embodiments of the indoor heat exchange structure according to the present disclosure. Figure 3 The relative position relationship between the first water collecting tray 33 and the first indoor heat exchanger 31 in the first direction A is shown by a simple diagram. The first direction A is parallel to the intersection line of the extension plane of the windward surface of the first indoor heat exchanger 31 and the extension plane of the windward surface of the second indoor heat exchanger 32. Here, the windward surface refers to the surface adjacent to the air outlet end 21 of the fan 2.

[0051] In order to prevent the condensed water from affecting the second indoor heat exchanger in structure, with reference to Figure 3In some embodiments, the maximum length of the first water pan 33 in the first direction A is greater than the maximum length of the first indoor heat exchanger 31 and the maximum length of the second indoor heat exchanger 32 respectively. In this way, when the first indoor heat exchanger 31 cools the airflow and produces condensate water, the condensate water in the length range of the first indoor heat exchanger 31 can flow more completely into the first water pan 33 without falling outside the first water pan 33. The longer first water pan 33 can be further drained downward at both ends to the second water pan 34 without falling to the shorter second indoor heat exchanger 32, reducing or avoiding the impact of condensate water on the second indoor heat exchanger 32.

[0052] Reference Figure 3 In the first direction A, at least one of the two ends of the first water pan 33 protrudes relative to the first indoor heat exchanger 31 and the second indoor heat exchanger 32. For example, in the first direction A, the first end 331 of the first water pan 33 protrudes relative to the first indoor heat exchanger 31 and the second indoor heat exchanger 32 by a length n1, and the second end 332 of the first water pan 33 protrudes relative to the first indoor heat exchanger 31 and the second indoor heat exchanger 32 by a length n2.

[0053] If n1 and n2 are too large, it will cause assembly difficulties and may result in insufficient space, requiring an increase in the size of the unit; and if n1 and n2 are too small, it is easy to cause condensate water to flow to the second indoor heat exchanger due to assembly deviation. Therefore, in some embodiments, the length n1 satisfies: 1mm < n1 < 30mm, for example, n1 takes a value of 3mm, 12mm, 18mm, 22mm, 26mm, etc.; and the length n2 satisfies: 1mm < n2 < 30mm, for example, n2 takes a value of 3mm, 12mm, 18mm, 22mm, 26mm, etc., which can reduce or avoid the impact of condensate water on the second indoor heat exchanger 32 while simplifying assembly and reducing space occupation.

[0054] Reference Figure 4 And Figure 5 In the vertical direction, the minimum distance between the second indoor heat exchanger 32 and the first water pan 33 is h. If h is too large, it will occupy a larger height space, resulting in an increase in the size of the unit; and if h is too small, the first water pan is too close to the two indoor heat exchangers, making installation more difficult. Therefore, in some embodiments, the minimum distance h satisfies: 0mm < h < 30mm, for example, h takes a value of 5mm, 12mm, 16mm, 21mm, 27mm, which can simplify assembly and reduce space occupation.

[0055] According to needs, the cross section of the first water pan 33 can be set to different shapes. For example, in Figure 4In some embodiments, the cross-section of the first water pan 33 in the first direction A is V-shaped. For example, as shown in Figure 5 In some embodiments, the cross-section of the first water pan 33 in the first direction A is an upside-down trapezoid with an open top. For example, as shown in Figure 4 and Figure 5 For the embodiments shown in

[0056] Referring to Figure 4 and Figure 5 , the height of the first side wall 333 and the height of the second side wall 334 are n3 and n4, respectively. If the heights n3 and n4 are too large, the first water pan 33 itself is too high and blocks a portion of the heat exchange area of the first indoor heat exchanger 31, thereby affecting the dehumidification and heat exchange effect. If the heights n3 and n4 are too small, the capacity of the first water pan 33 is small, and it is more likely to overflow or even blow water. Therefore, in some embodiments, the height n3 satisfies: 10mm < n3 < 30mm, for example, n3 takes a value of 15mm, 20mm, 25mm, etc., and the height n4 satisfies: 10mm < n4 < 30mm, for example, n4 takes a value of 15mm, 20mm, 25mm, etc., which can ensure the dehumidification and heat exchange effect of the first indoor heat exchanger 31 while reducing the risk of overflow or even blowing water of the first water pan 33.

[0057] Referring to Figure 4 , the included angle between the first side wall 333 and the second side wall 334 is n5. Figure 5 In some embodiments, the included angle between the first side wall 333 and the second side wall 334 is also n5. If the included angle n5 is too large, the first water pan 33 is too shallow and is likely to overflow or even blow water. If the included angle n5 is too small, it is likely to block a portion of the heat exchange area of the first indoor heat exchanger 31, thereby affecting the dehumidification and heat exchange effect. Therefore, in some embodiments, the included angle n5 satisfies: 60° < n5 < 150°, for example, n5 takes a value of 75°, 90°, 120°, etc., which can ensure the dehumidification and heat exchange effect of the first indoor heat exchanger 31 while reducing the risk of overflow or even blowing water of the first water pan 33.

[0058] Referring to Figure 5The cross section shown is a first water collecting tray 33 in the shape of an upside-down trapezoid with an open top, which further comprises a bottom plate 335 connected to both the first side wall 333 and the second side wall 334. The maximum dimension of the bottom plate 335 in the direction perpendicular to the first direction A is n6. The surface of the bottom plate 335 can be planar or arc-shaped. If n6 is too large, it will easily block a portion of the heat exchange area of the first indoor heat exchanger 31, thereby affecting the dehumidification heat exchange effect. Therefore, in some embodiments, the maximum dimension n6 satisfies: 0mm < n6 < 30mm, to ensure the dehumidification heat exchange effect of the first indoor heat exchanger 31.

[0059] With reference to Figure 1 and Figures 3-5 In some embodiments, the bottom end of the first indoor heat exchanger 31 is located between the first side wall 333 and the second side wall 334. In this way, the condensed water flowing out of the bottom end of the first indoor heat exchanger 31 can flow into the space between the first side wall 333 and the second side wall 334, avoiding flowing out to the outside of the first water collecting tray 33 and affecting the operation of the second indoor heat exchanger 32 below.

[0060] With reference to Figure 4 and Figure 5 In the vertical direction, the distance between the bottom of the first water collecting tray 33 and the first indoor heat exchanger 31 is L. In some embodiments, the distance L satisfies: L < n3; and / or L < n4. In this way, the first indoor heat exchanger 31 overlaps with the first water collecting tray 33 in height, thereby reducing the height space occupied by the indoor heat exchange structure.

[0061] In some embodiments, the ratio of the inner heat exchange area of the heat exchange tubes in the first indoor heat exchanger 31 to the inner heat exchange area of the heat exchange tubes in the second indoor heat exchanger 32 is P1, and the ratio of the outer heat exchange area of the heat exchange tubes in the first indoor heat exchanger 31 to the outer heat exchange area of the heat exchange tubes in the second indoor heat exchanger 32 is P2. If the ratios P1, P2 are too small, the heat exchange area of the first indoor heat exchanger 31 will be small, leading to incomplete evaporation, low system pressure, easy icing of the first indoor heat exchanger, and system backflow, reducing reliability; if the ratios P1, P2 are too large, the heat exchange area of the second indoor heat exchanger 32 will be small, leading to insufficient system backheat and difficult temperature control. Therefore, in some embodiments, the ratios P1, P2 can satisfy: 0.3 ≤ P1 ≤ 0.8, 0.3 ≤ P2 ≤ 0.8, thereby matching the heat exchange areas of the first indoor heat exchanger 31 and the second indoor heat exchanger 32, ensuring complete evaporation, not easy to ice, and sufficient backheat, thereby more accurately controlling the temperature.

[0062] The embodiments of the indoor heat exchange structure of the present disclosure can be applied to an air conditioning system. Therefore, the embodiments of the present disclosure provide an air conditioning system comprising the indoor heat exchange structure of any of the preceding embodiments. The air conditioning system herein is a ducted air conditioner system.

[0063] For the air conditioning system comprising the indoor heat exchange structure of the embodiments of the present disclosure, the air conditioning system can further comprise an indoor throttling valve, an indoor on-off valve, etc. Correspondingly, the first indoor heat exchanger 31 and the second indoor heat exchanger 32 can be connected in series with the corresponding indoor on-off valves and then connected in parallel, and a bypass is arranged between the refrigerant flow paths in which the first indoor heat exchanger 31 and the second indoor heat exchanger 32 are respectively located, and an indoor throttling valve is arranged in the bypass.

[0064] When the air conditioning system is enabled in the dehumidification mode, the indoor on-off valves in the refrigerant flow paths in which the first indoor heat exchanger 31 and the second indoor heat exchanger 32 are respectively located can be closed, and the throttling valve on the bypass can be opened to start the throttling function. In this way, the refrigerant first heats the air flowing through the second indoor heat exchanger 32, and after the refrigerant is fully heated, the refrigerant is throttled and depressurized to low-temperature refrigerant by the indoor throttling valve, and then flows into the first indoor heat exchanger 31 for cooling and dehumidification. The air flowing through the first indoor heat exchanger 31 is cooled and dehumidified, and can be directly contacted and heat exchanged with the up-floating hot air flowing through the second indoor heat exchanger 32, and at the same time of heat exchange, the humidity of the cold and hot air tends to be balanced.

[0065] So far, the embodiments of the present disclosure have been described in detail. In order to avoid obscuring the concept of the present disclosure, some details known in the art are not described. Those skilled in the art can fully understand how to implement the technical solutions disclosed herein according to the above description.

[0066] Although some specific embodiments of the present disclosure have been described in detail through examples, those skilled in the art should understand that the above examples are only for illustration, and are not intended to limit the scope of the present disclosure. Those skilled in the art should understand that the above embodiments can be modified or some technical features can be replaced equivalently without departing from the scope and spirit of the present disclosure. The scope of the present disclosure is defined by the appended claims.

Claims

1. An indoor heat exchange structure for an air conditioning system, characterized in that, Comprising: An air duct assembly (1) having an air duct (11) and an air outlet (12) communicating with the air duct (11); A fan (2) disposed in the air duct (11); and An indoor heat exchanger group (3) disposed in the air duct (11) and located between the exhaust end (21) of the fan (2) and the air outlet (12), configured to perform heat exchange with the air flow passing through the indoor heat exchanger group (3); Wherein, the indoor heat exchanger group (3) includes a first indoor heat exchanger (31), a second indoor heat exchanger (32), a second water receiving tray (34) and a first water receiving tray (33). The first indoor heat exchanger (31) is located above the second indoor heat exchanger (32). The first indoor heat exchanger (31) is configured to cool and dehumidify the air flow discharged from the exhaust end (21) of the fan (2) in the dehumidification mode of the air conditioning system. The second indoor heat exchanger (32) is configured to heat the air flow discharged from the exhaust end (21) of the fan (2) in the dehumidification mode of the air conditioning system. The first water receiving tray (33) is located between the first indoor heat exchanger (31) and the second indoor heat exchanger (32), configured to receive the condensed water of the first indoor heat exchanger (31). The second water receiving tray (34) is located below the second indoor heat exchanger (32), configured to receive the condensed water flowing out from the first water receiving tray (33); In a first direction (A), the maximum length of the first water receiving tray (33) is respectively greater than the maximum lengths of the first indoor heat exchanger (31) and the second indoor heat exchanger (32), so that the condensed water in the first water receiving tray (33) is discharged downward to the second water receiving tray (34) through both ends of the first water receiving tray (33) without falling onto the second indoor heat exchanger (32), wherein the first direction (A) is parallel to the intersection line of the extension plane of the windward surface of the first indoor heat exchanger (31) and the extension plane of the windward surface of the second indoor heat exchanger (32).

2. The indoor heat exchange structure according to claim 1, characterized in that, In the first direction (A), at least one of the two ends of the first water receiving tray (33) protrudes relative to the first indoor heat exchanger (31) and the second indoor heat exchanger (32).

3. The indoor heat exchange structure according to claim 2, characterized in that, In the first direction (A), the protruding length n1 of the first end (331) of the first water receiving tray (33) relative to the first indoor heat exchanger (31) and the second indoor heat exchanger (32) satisfies: 1 mm < n1 < 30 mm, and the protruding length n2 of the second end (332) of the first water receiving tray (33) relative to the first indoor heat exchanger (31) and the second indoor heat exchanger (32) satisfies: 1 mm < n2 < 30 mm.

4. The indoor heat exchange structure according to claim 1, characterized in that, In the vertical direction, the minimum distance h between the second indoor heat exchanger (32) and the first water receiving tray (33) satisfies: 0 mm < h < 30 mm.

5. The indoor heat exchange structure according to claim 1, characterized in that, In the first direction (A), the cross-sectional shape of the first water receiving tray (33) is V-shaped or an inverted trapezoid with an open top. The first water receiving tray (33) includes a first side wall (333) adjacent to the blower (2) and a second side wall (334) located on the side of the first side wall (333) away from the blower (2). Here, the first direction (A) is parallel to the intersection line of the extension plane of the windward surface of the first indoor heat exchanger (31) and the extension plane of the windward surface of the second indoor heat exchanger (32).

6. The indoor heat exchange structure according to claim 5, characterized in that, The height n3 of the first side wall (333) satisfies: 10 mm < n3 < 30 mm, and the height n4 of the second side wall (334) satisfies: 10 mm < n4 < 30 mm.

7. The indoor heat exchange structure according to claim 5, characterized in that, The included angle n5 between the first side wall (333) and the second side wall (334) satisfies: 60° < n5 < 150°.

8. The indoor heat exchange structure according to claim 5, characterized in that, The bottom end of the first indoor heat exchanger (31) is located between the first side wall (333) and the second side wall (334).

9. The indoor heat exchange structure according to claim 6, characterized in that, In the vertical direction, the distance L between the bottom of the first water receiving tray (33) and the first indoor heat exchanger (31) satisfies: L < n3; and / or L < n4.

10. The indoor heat exchange structure according to claim 5, characterized in that, The cross-sectional shape of the first water receiving tray (33) is an inverted trapezoid with an open top. The first water receiving tray (33) further includes a bottom plate (335) connected to both the first side wall (333) and the second side wall (334). The maximum dimension n6 of the bottom plate (335) in the direction perpendicular to the first direction (A) satisfies: 0 mm < n6 < 30 mm.

11. The indoor heat exchange structure according to claim 1, characterized in that, The bottom end of the first indoor heat exchanger (31) and the top end of the second indoor heat exchanger (32) are opposite in the vertical direction, and the included angle between the windward surface of the first indoor heat exchanger (31) and the windward surface of the second indoor heat exchanger (32) is less than 180°.

12. The indoor heat exchange structure according to claim 1, characterized in that, The second water receiving tray (34) has an inclined side wall (341) adjacent to the air outlet (12) for guiding the airflow passing through the second indoor heat exchanger (32) to flow towards the air outlet (12).

13. The indoor heat exchange structure according to claim 1, characterized in that, The ratio P1 of the inner heat exchange area of the heat exchange tubes in the first indoor heat exchanger (31) to the inner heat exchange area of the heat exchange tubes in the second indoor heat exchanger (32) satisfies: 0.3 ≤ P1 ≤ 0.8; the ratio P2 of the outer heat exchange area of the heat exchange tubes in the first indoor heat exchanger (31) to the outer heat exchange area of the heat exchange tubes in the second indoor heat exchanger (32) satisfies: 0.3 ≤ P2 ≤ 0.

8.

14. An air conditioning system, characterized in that, Comprising: The indoor heat exchange structure according to any one of claims 1 to 13.

15. The air conditioning system according to claim 14, characterized in that, The air conditioning system is a duct type air conditioning system.

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