Heat exchange device and control method thereof

Abstract

The application provides a heat exchange device and a control method thereof. The heat exchange device comprises a shell, a first heat exchanger, a second heat exchanger and a fan. The shell comprises a first air inlet and a second air inlet. The first heat exchanger is arranged at the first air inlet. The first heat exchanger and the second heat exchanger are arranged in the shell and avoid the second air inlet. The fan is arranged in the shell. When the heat exchange device is in a refrigeration mode, the first heat exchanger is located at an upstream position of the fan, and the second heat exchanger is located at a downstream position of the fan, so that the air entering the first air inlet is exchanged by the first heat exchanger and then flows into the fan together with the air entering the second air inlet. The application solves the problem of low heat exchange efficiency of the heat exchange device in the prior art.

Description

Technical Field

[0001] This invention relates to the field of heat exchange equipment technology, and more specifically, to a heat exchange equipment and its control method. Background Technology

[0002] In modern society, air conditioning equipment is a commonly used heat exchange device, applied in various fields such as medicine and construction. With the development of the times, people have put forward higher requirements for air conditioning equipment, and miniaturization has become a development trend. However, while air conditioning equipment is becoming smaller, people's requirements for energy efficiency have not decreased, which brings a severe challenge to improving the energy efficiency of air conditioning equipment.

[0003] Existing methods for enhancing heat exchange in air conditioning systems generally include increasing the heat exchange area, increasing the heat transfer coefficient, and increasing the refrigerant flow rate. When the size of the heat exchanger decreases, increasing the heat transfer coefficient becomes an important way to improve the energy efficiency of air conditioning equipment. Most indoor heat exchangers in existing technologies adopt a multi-row tube configuration. However, in use, the heat exchange of the first row of heat exchangers on the windward side accounts for a large proportion. When air passes through the first and second rows of tubes for heat exchange, the temperature difference is significantly reduced, resulting in the heat exchange capacity of the second row of tubes being much lower than that of the first row of tubes. When multiple air intake methods are used, because the position of the heat exchanger is fixed, the flow path cannot be changed according to the change of air intake method, and the distribution of refrigerant flow cannot be accurately adjusted and controlled, resulting in a decrease in the heat exchange efficiency of the air conditioning equipment.

[0004] This indicates that existing technologies suffer from low heat exchange efficiency in heat exchange equipment. Summary of the Invention

[0005] The main objective of this invention is to provide a heat exchange device and its control method to solve the problem of low heat exchange efficiency in existing heat exchange devices.

[0006] To achieve the above objectives, according to one aspect of the present invention, a heat exchange device is provided, comprising: a housing, the housing including a first air inlet and a second air inlet; a first heat exchanger, the first heat exchanger being correspondingly disposed at the first air inlet; a second heat exchanger, both the first heat exchanger and the second heat exchanger being disposed inside the housing and avoiding the second air inlet; and a fan, the fan being disposed inside the housing, and in the cooling mode of the heat exchange device, the first heat exchanger being located upstream of the fan and the second heat exchanger being located downstream of the fan, so that the first heat exchanger heats the air entering from the first air inlet and then merges it with the air entering from the second air inlet before flowing into the fan.

[0007] Furthermore, the outer casing has a first cavity, a second cavity, and a third cavity arranged sequentially along a first direction, with the fan and the first heat exchanger disposed in the second cavity; and the first air inlet is disposed on the shell wall corresponding to the second cavity.

[0008] Furthermore, the second heat exchanger is disposed in the first cavity; the second air inlet is disposed on the shell wall corresponding to the third cavity.

[0009] Furthermore, the first direction is vertical, and the first cavity is located above the second cavity.

[0010] Furthermore, a first vent is provided on the shell wall corresponding to the first cavity, and a second vent is provided on the shell wall corresponding to the third cavity. The heat exchange equipment also includes at least two sets of air duct assemblies. The first set of air duct assemblies extends from the fan toward the side where the second heat exchanger is located and blows air toward the first vent. The second set of air duct assemblies blows air from the fan toward the second vent.

[0011] Furthermore, the air duct assembly has an air duct baffle, which can be switched to adjust the on / off state of the corresponding air duct assembly.

[0012] Furthermore, the second heat exchanger is located between the first vent and the first set of air duct components.

[0013] Furthermore, the heat exchange equipment also includes at least two baffle assemblies. At least a portion of the first set of air duct assemblies extends into the first cavity, and a first connecting channel is formed between the first set of air duct assemblies and the inner wall surface of the outer shell. The first baffle assembly is switchably disposed at the first connecting channel to control the on / off state of the first connecting channel. At least a portion of the second set of air duct assemblies extends into the third cavity, and a second connecting channel is formed between the second set of air duct assemblies and the inner wall surface of the outer shell. The second baffle assembly is switchably disposed at the second connecting channel to control the on / off state of the second connecting channel.

[0014] Furthermore, the partition assembly can be flipped to connect to the inner wall of the duct assembly or housing.

[0015] Furthermore, the first vent is located on the top or periphery of the housing.

[0016] Furthermore, the fan is a double-suction centrifugal fan; and / or the fan's axis is arranged perpendicular to the first direction.

[0017] Furthermore, the first heat exchanger is a U-shaped heat exchanger, with both ends of the fan axially facing a set of parallel sides of the U-shaped heat exchanger; and / or the second heat exchanger is a V-shaped heat exchanger, with the open side of the V-shaped heat exchanger facing away from the fan.

[0018] Furthermore, the first air inlet and / or the second air inlet are arranged to extend circumferentially around the outer casing, wherein the extension length of the first air inlet is not less than three-quarters of the circumferential length of the outer casing; and / or the extension length of the second air inlet is not less than three-quarters of the circumferential length of the outer casing.

[0019] Furthermore, the first heat exchanger and the second heat exchanger are connected in parallel or independently of each other. When the first heat exchanger and the second heat exchanger are connected in parallel, a regulating valve is provided between the first heat exchanger and the second heat exchanger to regulate the refrigerant flow rate of the first heat exchanger and the second heat exchanger.

[0020] According to another aspect of the present invention, a control method for a heat exchange device is provided. The heat exchange device adopts the control method of the heat exchange device. The control method includes: receiving a mode command, the mode command being used to determine the operating mode of the heat exchange device; if the mode command is a cooling mode, controlling the fan to start, and controlling the first baffle assembly of the heat exchange device to close, the second baffle assembly of the heat exchange device to open, the first set of air duct assemblies of the heat exchange device to open, and the second set of air duct assemblies of the heat exchange device to close.

[0021] Furthermore, the control method also includes: if the mode command is heating mode, controlling the fan to turn on, and controlling the second baffle assembly to close, the first baffle assembly to open, the first set of air duct assemblies to close, and the second set of air duct assemblies to open.

[0022] Furthermore, the control method also includes: if the mode command is defrosting mode, controlling the fan to turn on, and controlling both the first baffle assembly and the second baffle assembly to close, the first set of air duct assemblies to open, and the second set of air duct assemblies to close.

[0023] Furthermore, the heat exchange equipment also includes a room temperature sensor for detecting indoor temperature, and the control method further includes: receiving the indoor temperature signal from the room temperature sensor; if the indoor temperature decreases, controlling the regulating valve of the heat exchange equipment to decrease its opening; if the indoor temperature increases, controlling the regulating valve to increase its opening.

[0024] The heat exchange device using the technical solution of this invention includes a shell, a first heat exchanger, a second heat exchanger, and a fan. The shell includes a first air inlet and a second air inlet. The first heat exchanger is correspondingly disposed at the first air inlet. Both the first and second heat exchangers are disposed inside the shell and avoid the second air inlet. The fan is disposed inside the shell. When the heat exchange device is in cooling mode, the first heat exchanger is located upstream of the fan, and the second heat exchanger is located downstream of the fan. This allows the first heat exchanger to exchange heat with the air entering from the first air inlet, and then the air entering from the second air inlet flows into the fan. In this way, the heat exchange device can perform two-stage heat exchange through the two heat exchangers. The air temperature after the first heat exchange is relatively low. By introducing indoor air to mix with it, the temperature difference between the air and the second heat exchanger during the second heat exchange is increased, thereby increasing the heat exchange efficiency of the heat exchange device and solving the problem of low heat exchange efficiency in the prior art. Attached Figure Description

[0025] The accompanying drawings, which form part of this application, are used to provide a further understanding of the invention. The illustrative embodiments of the invention and their descriptions are used to explain the invention and do not constitute an undue limitation of the invention. In the drawings:

[0026] Figure 1 A schematic diagram of the heat exchange device according to a specific embodiment of the present invention is shown at one angle.

[0027] Figure 2 A schematic diagram of the heat exchange device according to a specific embodiment of the present invention is shown from another angle.

[0028] Figure 3 A schematic diagram of the heat exchange device according to a specific embodiment of the present invention is shown from another angle.

[0029] Figure 4 A schematic diagram of the heat exchange device in cooling mode according to a specific embodiment of the present invention is shown;

[0030] Figure 5 This diagram shows a schematic of the heat exchange device in heating mode according to a specific embodiment of the present invention.

[0031] Figure 6 This diagram illustrates the structure of a heat exchange device in defrosting mode according to a specific embodiment of the present invention.

[0032] Figure 7 This diagram illustrates the structure of a heat exchange device according to a specific embodiment of the present invention from another angle.

[0033] Figure 8 A schematic diagram of the structure of a first heat exchanger and a second heat exchanger in a specific embodiment of the present invention is shown.

[0034] Figure 9 A schematic diagram showing the connection between the first heat exchanger and the second heat exchanger in a specific embodiment of the present invention is shown.

[0035] The above figures include the following reference numerals:

[0036] 10. Outer shell; 11. First air inlet; 12. Second air inlet; 13. First cavity; 131. First vent; 14. Second cavity; 15. Third cavity; 151. Second vent; 20. First heat exchanger; 30. Second heat exchanger; 40. Fan; 50. First air duct assembly; 51. Air duct baffle; 60. Second air duct assembly; 70. First partition assembly; 80. Second partition assembly. Detailed Implementation

[0037] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. The following description of at least one exemplary embodiment is merely illustrative and is in no way intended to limit the present invention or its application or use. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0038] To address the problem of low heat exchange efficiency in existing heat exchange equipment, this invention provides a heat exchange device and a control method.

[0039] like Figures 1 to 8 As shown, the heat exchange device includes a housing 10, a first heat exchanger 20, a second heat exchanger 30, and a fan 40. The housing 10 includes a first air inlet 11 and a second air inlet 12. The first heat exchanger 20 is correspondingly disposed at the first air inlet 11. Both the first heat exchanger 20 and the second heat exchanger 30 are disposed inside the housing 10 and avoid the second air inlet 12. The fan 40 is disposed inside the housing 10, and when the heat exchange device is in cooling mode, the first heat exchanger 20 is located upstream of the fan 40, and the second heat exchanger 30 is located downstream of the fan 40, so that the first heat exchanger 20 heats the air entering from the first air inlet 11 and then merges it with the air entering from the second air inlet 12 before flowing into the fan 40.

[0040] The heat exchange equipment includes a housing 10, a first heat exchanger 20, a second heat exchanger 30, and a fan 40. The housing 10 includes a first air inlet 11 and a second air inlet 12. The first heat exchanger 20 is correspondingly located at the first air inlet 11. Both the first heat exchanger 20 and the second heat exchanger 30 are located inside the housing 10 and avoid the second air inlet 12. The fan 40 is located inside the housing 10. When the heat exchange equipment is in cooling mode, the first heat exchanger 20 is located upstream of the fan 40, and the second heat exchanger 30 is located downstream of the fan 40. This allows the first heat exchanger 20 to exchange heat with the air entering from the first air inlet 11, which then merges with the air entering from the second air inlet 12 before flowing into the fan 40. In this way, the heat exchange equipment can perform two-stage heat exchange through the two heat exchangers. The air temperature after the first heat exchange is relatively low. By introducing indoor air to mix with it, the temperature difference between the air and the second heat exchanger 30 during the second heat exchange is increased, thereby increasing the heat exchange efficiency of the heat exchange equipment.

[0041] In this embodiment, the heat exchange device is an air conditioner. Furthermore, both the first heat exchanger 20 and the second heat exchanger 30 are evaporators.

[0042] like Figures 1 to 5As shown, the outer casing 10 has a first cavity 13, a second cavity 14, and a third cavity 15 arranged sequentially along a first direction. A fan 40 and a first heat exchanger 20 are disposed within the second cavity 14. A first air inlet 11 is disposed on the casing wall of the outer casing 10 corresponding to the second cavity 14. That is, the first air inlet 11 communicates with the second cavity 14.

[0043] In this embodiment, the first direction is vertical, and the first cavity 13 is located above the second cavity 14. That is, the first cavity 13, the second cavity 14, and the third cavity 15 are arranged sequentially from top to bottom.

[0044] Furthermore, such as Figures 3 to 6 As shown, the second heat exchanger 30 is disposed in the first cavity 13. It can be understood that the first heat exchanger 20 and the second heat exchanger 30 are located in different cavities. The second air inlet 12 is disposed on the shell wall of the outer casing 10 corresponding to the third cavity 15. That is, the second air inlet 12 is connected to the third cavity 15.

[0045] like Figures 3 to 6 As shown, the outer shell 10 has a first vent 131 on the shell wall corresponding to the first cavity 13, and the outer shell 10 has a second vent 151 on the shell wall corresponding to the third cavity 15. The heat exchange equipment also includes at least two sets of air duct assemblies. The first set of air duct assemblies extends from the fan 40 toward the side where the second heat exchanger 30 is located and blows air toward the first vent 131. The second set of air duct assemblies blows air from the fan 40 toward the second vent 151.

[0046] Specifically, such as Figures 3 to 6 As shown, this embodiment includes two sets of air duct components: a first air duct component 50 and a second air duct component 60. The inlet end of the first air duct component 50 is connected to the outlet of the fan 40, and the outlet end corresponds to the first vent 131. The inlet end of the second air duct component 60 is connected to the outlet of the fan 40, and the outlet end corresponds to the second vent 151. Furthermore, in this embodiment, the second heat exchanger 30 is located between the first vent 131 and the first air duct component 50. The outlet end of the first air duct component 50 is connected to the second heat exchanger 30, and the second heat exchanger 30 is connected to the upper part of the outer casing 10. On the other hand, the second air duct component 60 is also connected to the lower part of the outer casing 10, thereby achieving the connection and fixation of the air duct components, the second heat exchanger 30, and the fan 40.

[0047] like Figures 3 to 6As shown, the air duct assembly has an air duct baffle 51, which can be switched to adjust the on / off state of the corresponding air duct assembly. The on / off state of the first air duct assembly 50 and the second air duct assembly 60 is controlled by the air duct baffle 51, changing the airflow path in different modes. Specifically, the air duct baffle 51 is flip-mounted inside the air duct assembly, and the opening of the air duct assembly is adjusted by adjusting its flip angle, thereby controlling the on / off state of the air duct assembly.

[0048] like Figures 1 to 6 As shown, the heat exchange device also includes at least two baffle assemblies. At least a portion of the first set of air duct assemblies extends into the first cavity 13, and a first communication channel is formed between the first set of air duct assemblies and the inner wall surface of the outer shell 10. The first baffle assembly is switchably disposed at the first communication channel to control the on / off state of the first communication channel. At least a portion of the second set of air duct assemblies extends into the third cavity 15, and a second communication channel is formed between the second set of air duct assemblies and the inner wall surface of the outer shell 10. The second baffle assembly is switchably disposed at the second communication channel to control the on / off state of the second communication channel.

[0049] In this embodiment, the partition assembly is rotatably connected to the air duct assembly or the inner wall surface of the housing 10.

[0050] Specifically, such as Figures 1 to 6 As shown, this embodiment has two partition assemblies: a first partition assembly 70 and a second partition assembly 80. The first partition assembly 70 is located at the first connecting channel between the outer wall of the first air duct assembly 50 and the inner wall of the outer shell 10, and can control the connection and interruption of the first connecting channel. The first partition assembly 70 cooperates with the air duct baffle 51 in the first air duct assembly 50 to achieve diversified airflow paths. Similarly, the second partition assembly 80 and the second air duct assembly 60 can achieve the same effect. That is, the first air duct assembly 50 is located between the first cavity 13 and the second cavity 14 and controls the connection and interruption of the two cavities except for the first air duct assembly 50. The second air duct assembly 60 is located between the second cavity 14 and the third cavity 15 and controls the connection and interruption of the two cavities except for the second air duct assembly 60.

[0051] In this embodiment, the first vent 131 is located at the top or periphery of the outer casing 10. According to the laws of thermal flow, cold air tends to sink during cooling, so a "bottom-in, top-out" air supply method is suitable. Placing the first vent 131 at the top or periphery of the outer casing 10 can prevent cold air from blowing on people, thus improving the user experience.

[0052] In this embodiment, the fan 40 is a double-suction centrifugal fan. The axis of the fan 40 is perpendicular to the first direction. That is, the axis of the fan 40 is horizontal.

[0053] In this embodiment, the first heat exchanger 20 is a U-shaped heat exchanger, and the two ends of the fan 40 are arranged axially toward a set of parallel sides of the U-shaped heat exchanger, such as... Figure 8 As shown. This allows the first heat exchanger 20 to be compatible with the fan 40, with both air inlets of the fan 40 located within the area of ​​the first heat exchanger 20. Of course, the first heat exchanger 20 can also be of other shapes, which can be selected according to actual needs.

[0054] In this embodiment, the second heat exchanger 30 is a V-shaped heat exchanger, and the open side of the V-shaped heat exchanger is positioned away from the fan 40. With this configuration, the flow direction of the refrigerant within the second heat exchanger 30 is perpendicular to the air intake direction, thereby enhancing heat exchange. Of course, the second heat exchanger 30 can also be of other shapes, and can be selected according to actual needs.

[0055] In this embodiment, the first air inlet 11 extends circumferentially around the outer casing 10. Correspondingly, the second air inlet 12 also extends circumferentially around the outer casing 10. Specifically, the extension length of the first air inlet 11 is not less than three-quarters of the circumferential length of the outer casing 10. The extension length of the second air inlet 12 is not less than three-quarters of the circumferential length of the outer casing 10. That is to say, in this embodiment, the first air inlet 11 and the second air inlet 12 are located on the left and right sides and the rear side of the outer casing 10, but not on the front side, ensuring both the air intake area and the aesthetics of the heat exchange equipment.

[0056] In this embodiment, the first heat exchanger 20 and the second heat exchanger 30 are arranged in parallel, such as... Figure 9 As shown. Accordingly, in this embodiment, the two heat exchangers employ a single evaporation / condensation temperature. Furthermore, a regulating valve is provided between the first heat exchanger 20 and the second heat exchanger 30 to regulate the refrigerant flow rate between the two heat exchangers. Specifically, the regulating valve is an electronic expansion valve.

[0057] In one alternative embodiment, the first heat exchanger 20 and the second heat exchanger 30 are arranged independently of each other. Accordingly, the two heat exchangers adopt dual evaporation / condensation temperatures. During refrigeration, the evaporation temperature of the first heat exchanger 20 needs to be higher than that of the second heat exchanger 30, thereby increasing the heat exchange temperature difference between the two stages of heat exchange and thus improving the heat exchange efficiency of the heat exchange equipment.

[0058] This application also provides a control method for a heat exchanger, wherein the aforementioned heat exchanger employs this control method. The control method includes: receiving a mode command, the mode command being used to determine the operating mode of the heat exchanger; if the mode command is a cooling mode, controlling the fan 40 to start, and controlling the first baffle assembly of the heat exchanger to close, the second baffle assembly of the heat exchanger to open, the first set of air duct assemblies of the heat exchanger to open, and the second set of air duct assemblies of the heat exchanger to close.

[0059] Specifically, such as Figure 4 As shown, in cooling mode, the fan 40 remains on, the second partition assembly 80 opens to connect the second connecting channel, the first partition assembly 70 closes to isolate the first connecting channel, and the duct baffle 51 in the first air duct assembly 50 opens while the duct baffle 51 in the second air duct assembly 60 closes. At this time, a portion of the indoor air enters the third cavity 15 from the second air inlet 12 and enters the second cavity 14 through the second connecting channel. It then mixes with another portion of the indoor air that enters the second cavity 14 from the first air inlet 11 and exchanges heat with the first heat exchanger 20. The mixture then flows into the fan 40 for thorough mixing and is blown by the fan 40 through the first air duct assembly 50 to the second heat exchanger 30 for secondary heat exchange. Finally, the air is discharged from the first vent 131, achieving a "bottom-in, top-out" cold air delivery method. The refrigeration process involves two stages of heat exchange. The air temperature is low after the first heat exchange. Indoor air is introduced to mix with the air, thereby increasing the temperature difference between the air and the second heat exchanger 30 during the second heat exchange and improving the heat exchange efficiency of the heat exchange equipment.

[0060] In this embodiment, the control method further includes: if the mode command is heating mode, controlling the fan 40 to turn on, and controlling the second baffle assembly to close, the first baffle assembly to open, the first group of air duct assemblies to close, and the second group of air duct assemblies to open.

[0061] Specifically, such as Figure 5 As shown, in heating mode, fan 40 remains on, first baffle assembly 70 opens to connect the first connecting channel, and second baffle assembly 80 closes to disconnect the second connecting channel. Simultaneously, duct baffle 51 in first duct assembly 50 closes, and duct baffle 51 in second duct assembly 60 opens. At this time, some indoor air enters the second cavity 14 through first air inlet 11 and exchanges heat with first heat exchanger 20. Another portion of indoor air enters the first cavity 13 through first vent 131, exchanges heat with second heat exchanger 30, and then enters the second cavity 14 through the first connecting channel. The two portions of air mix and converge into fan 40 for thorough mixing. The air then passes through second duct assembly 60 and is finally discharged from second vent 151, achieving a "top-in, bottom-out" hot air delivery method. This air delivery method enables carpet-like heating of hot air, reduces vertical air temperature differences, and improves human thermal comfort. The heating operation involves two stages of heat exchange, occurring simultaneously, followed by a final mixture and delivery. The air temperature on the outlet side of the first heat exchanger 20 and the second heat exchanger 30 is relatively high, while the air temperature on the inlet side is relatively low, which can also ensure a large heat exchange temperature difference, thereby improving the heat exchange effect of the heat exchange equipment.

[0062] In this embodiment, the control method further includes: if the mode command is defrosting mode, controlling the fan 40 to turn on, and controlling both the first baffle assembly and the second baffle assembly to turn off, the first group of air duct assemblies to turn on, and the second group of air duct assemblies to turn off.

[0063] Specifically, such as Figure 6 As shown, in defrost mode, the fan 40 remains on, while the first baffle assembly 70 and the second baffle assembly 80 remain closed. Simultaneously, the duct baffle 51 within the first duct assembly 50 opens, and the duct baffle 51 within the second duct assembly 60 closes. At this time, indoor air enters the second cavity 14 through the first air inlet 11 and exchanges heat with the first heat exchanger 20. The air is then blown by the fan 40 through the first duct assembly 50 to the second heat exchanger 30, where it exchanges heat again, and finally exits through the first vent 131, thus achieving defrosting. This achieves "side air intake + top air exhaust" for the heat exchange equipment, absorbing some heat from the indoor environment for defrosting the outdoor heat exchanger. With the first heat exchanger 20 and the fan 40's air inlet close together, the secondary heat exchange efficiency is high, the defrosting speed is faster, and ineffective heat loss due to shell heat absorption is low, resulting in a better heating experience for the user, and the cold air from the top vent does not blow directly on people.

[0064] It should be noted that, Figures 4 to 6 The arrows in the diagram indicate the direction of airflow.

[0065] In this embodiment, the heat exchange device further includes a room temperature sensor for detecting indoor temperature, and the control method further includes: receiving the indoor temperature signal from the room temperature sensor; if the indoor temperature decreases, controlling the regulating valve of the heat exchange device to decrease its opening; if the indoor temperature increases, controlling the regulating valve to increase its opening.

[0066] Specifically, when the indoor air temperature decreases, the room load decreases. By controlling the opening of the regulating valve, the refrigerant flow rate of the first heat exchanger 20 or the second heat exchanger 30 is reduced, the refrigerant flow velocity is increased, heat transfer is enhanced, and the heat exchange capacity and energy efficiency of the heat exchange equipment are improved. Conversely, when the indoor air temperature is high, the room load is large. By controlling the opening of the regulating valve, both heat exchangers maintain a large heat exchange temperature difference, thereby achieving a better heat exchange effect.

[0067] As can be seen from the above description, the above embodiments of the present invention achieve the following technical effects: by setting the heat exchange equipment including a shell 10, a first heat exchanger 20, a second heat exchanger 30 and a fan 40, the shell 10 includes a first air inlet 11 and a second air inlet 12, and the first heat exchanger 20 is correspondingly arranged at the first air inlet 11. The first heat exchanger 20 and the second heat exchanger 30 are both located inside the outer casing 10 and avoid the second air inlet 12. The fan 40 is located inside the outer casing 10. When the heat exchange equipment is in cooling mode, the first heat exchanger 20 is located upstream of the fan 40, and the second heat exchanger 30 is located downstream of the fan 40. This allows the first heat exchanger 20 to exchange the heat of the air entering from the first air inlet 11 and then merge it with the air entering from the second air inlet 12 before flowing into the fan 40. In this way, the heat exchange equipment can perform two-stage heat exchange through the two heat exchangers. The air temperature after the first heat exchange is relatively low. By introducing indoor air to mix with it, the temperature difference between the air and the second heat exchanger 30 during the second heat exchange is increased, thereby increasing the heat exchange efficiency of the heat exchange equipment.

[0068] It should be noted that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to limit the exemplary embodiments according to this application. As used herein, the singular form is intended to include the plural form as well, unless the context clearly indicates otherwise. Furthermore, it should be understood that when the terms "comprising" and / or "including" are used in this specification, they indicate the presence of features, steps, operations, devices, components, and / or combinations thereof.

[0069] Unless otherwise specifically stated, the relative arrangement, numerical expressions, and values ​​of the components and steps set forth in these embodiments do not limit the scope of the invention. It should also be understood that, for ease of description, the dimensions of the various parts shown in the drawings are not drawn to actual scale. Techniques, methods, and devices known to those skilled in the art may not be discussed in detail, but where appropriate, such techniques, methods, and devices should be considered part of the specification. In all examples shown and discussed herein, any specific values ​​should be interpreted as merely exemplary and not as limitations. Therefore, other examples of exemplary embodiments may have different values. It should be noted that similar reference numerals and letters in the following figures denote similar items; therefore, once an item is defined in one figure, it need not be further discussed in subsequent figures.

[0070] In the description of this invention, it should be understood that the orientation or positional relationship indicated by directional terms such as "front, back, up, down, left, right", "horizontal, vertical, horizontal" and "top, bottom" is generally based on the orientation or positional relationship shown in the accompanying drawings, and is only for the convenience of describing this invention and simplifying the description. Unless otherwise stated, these directional terms do not indicate or imply that the device or element referred to must have a specific orientation or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation on the scope of protection of this invention; the directional terms "inner" and "outer" refer to the inner and outer contours relative to the outline of each component itself.

[0071] For ease of description, spatial relative terms such as "above," "on top of," "on the upper surface of," "above," etc., are used herein to describe the spatial positional relationship of a device or feature as shown in the figures to other devices or features. It should be understood that spatial relative terms are intended to encompass different orientations in use or operation beyond the orientation of the device as described in the figures. For example, if the device in the figures were inverted, a device described as "above" or "on top of" other devices or structures would subsequently be positioned as "below" or "under" other devices or structures. Thus, the exemplary term "above" can include both "above" and "below." The device may also be positioned in other different ways, rotated 90 degrees, or in other orientations, and the spatial relative descriptions used herein will be interpreted accordingly.

[0072] Furthermore, it should be noted that the use of terms such as "first" and "second" to define components is merely for the purpose of distinguishing the corresponding components. Unless otherwise stated, the above terms have no special meaning and therefore should not be construed as limiting the scope of protection of this invention.

[0073] It should be noted that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to limit the exemplary embodiments according to this application. As used herein, the singular form is intended to include the plural form as well, unless the context clearly indicates otherwise. Furthermore, it should be understood that when the terms "comprising" and / or "including" are used in this specification, they indicate the presence of features, steps, operations, devices, components, and / or combinations thereof.

[0074] It should be noted that the terms "first," "second," etc., used in the specification, claims, and accompanying drawings of this application are used to distinguish similar objects and are not necessarily used to describe a specific order or sequence. It should be understood that such data can be interchanged where appropriate so that the embodiments of this application described herein can be implemented in sequences other than those illustrated or described herein.

[0075] The above are merely preferred embodiments of the present invention and are not intended to limit the present invention. Various modifications and variations can be made to the present invention by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the scope of protection of the present invention.

Claims

1. A heat exchange device, characterized in that, include: The housing (10) includes a first air inlet (11) and a second air inlet (12); The first heat exchanger (20) is disposed at the first air inlet (11); The second heat exchanger (30) is provided inside the outer casing (10) and avoids the second air inlet (12). A fan (40) is disposed inside the outer casing (10). When the heat exchange device is in cooling mode, the first heat exchanger (20) is located upstream of the fan (40), and the second heat exchanger (30) is located downstream of the fan (40), so that the first heat exchanger (20) heats the air entering from the first air inlet (11) and then merges it with the air entering from the second air inlet (12) before flowing into the fan (40). The outer shell (10) has a first cavity (13), a second cavity (14) and a third cavity (15) arranged sequentially along a first direction. The fan (40) and the first heat exchanger (20) are disposed in the second cavity (14); The first air inlet (11) is disposed on the shell wall of the outer shell (10) corresponding to the second cavity (14); The outer shell (10) is provided with a first vent (131) on the shell wall corresponding to the first cavity (13), and the outer shell (10) is provided with a second vent (151) on the shell wall corresponding to the third cavity (15). The heat exchange device also includes at least two sets of air duct assemblies. The first set of air duct assemblies extends from the fan (40) toward the side where the second heat exchanger (30) is located and blows air toward the first vent (131). The second set of air duct assemblies blows air from the fan (40) toward the second vent (151). The first vent (131) is located on the top or periphery of the housing (10); The second heat exchanger (30) is disposed in the first cavity (13); The second air inlet (12) is disposed on the shell wall of the outer shell (10) at the location corresponding to the third cavity (15); The air duct assembly has an air duct baffle (51), which is switchably configured to adjust the on / off state of the corresponding air duct assembly; The heat exchange device also includes at least two baffle assemblies. At least a portion of the first set of air duct components extends into the first cavity (13), and a first communication channel is formed between the first set of air duct components and the inner wall surface of the outer shell (10). The first partition assembly is switchably disposed at the first communication channel to control the on / off state of the first communication channel. At least a portion of the second set of air duct components extends into the third cavity (15), and a second communication channel is formed between the second set of air duct components and the inner wall surface of the outer shell (10). The second partition assembly is switchably disposed at the second communication channel to control the on / off state of the second communication channel.

2. The heat exchange device according to claim 1, characterized in that, The first direction is vertical, and the first cavity (13) is located above the second cavity (14).

3. The heat exchange device according to claim 1, characterized in that, The second heat exchanger (30) is located between the first vent (131) and the first set of the air duct assembly.

4. The heat exchange device according to claim 1, characterized in that, The partition assembly is rotatably connected to the air duct assembly or the inner wall of the housing (10).

5. The heat exchange device according to claim 1, characterized in that, The first vent (131) is located on the top or periphery of the housing (10).

6. The heat exchange device according to claim 1, characterized in that, The fan (40) is a double-suction centrifugal fan (40); and / or The axial direction of the fan (40) is perpendicular to the first direction.

7. The heat exchange device according to claim 1, characterized in that, The first heat exchanger (20) is a U-shaped heat exchanger, with both ends of the fan (40) axially aligned with a set of parallel sides of the U-shaped heat exchanger; and / or The second heat exchanger (30) is a V-shaped heat exchanger, and the opening side of the V-shaped heat exchanger is set away from the direction of the fan (40).

8. The heat exchange device according to claim 1, characterized in that, The first air inlet (11) and / or the second air inlet (12) are arranged to extend circumferentially around the outer casing (10). The extension length of the first air inlet (11) is not less than three-quarters of the circumferential length of the outer casing (10); and / or The extension length of the second air inlet (12) is not less than three-quarters of the circumferential length of the outer shell (10).

9. The heat exchange device according to any one of claims 1 to 8, characterized in that, The first heat exchanger (20) and the second heat exchanger (30) are connected in parallel or independently of each other. When the first heat exchanger (20) and the second heat exchanger (30) are connected in parallel, a regulating valve is provided between the first heat exchanger (20) and the second heat exchanger (30) to regulate the refrigerant flow of the first heat exchanger (20) and the second heat exchanger (30).

10. A control method for a heat exchange device, characterized in that, The heat exchanger according to any one of claims 1 to 9 employs the control method of the heat exchanger, the control method comprising: Receive mode instructions, the mode instructions being used to determine the operating mode of the heat exchange equipment; If the mode command is cooling mode, control the fan (40) to turn on, and control the first baffle assembly of the heat exchange device to close, the second baffle assembly of the heat exchange device to open, the first set of air duct assemblies of the heat exchange device to open, and the second set of air duct assemblies of the heat exchange device to close.

11. The control method for the heat exchanger according to claim 10, characterized in that, The control method further includes: If the mode command is heating mode, control the fan (40) to turn on, and control the second partition assembly to turn off, the first partition assembly to turn on, the first group of air duct assemblies to turn off, and the second group of air duct assemblies to turn on.

12. The control method for the heat exchanger according to claim 10, characterized in that, The control method further includes: If the mode command is defrosting mode, control the fan (40) to turn on, and control the first partition assembly and the second partition assembly to turn off, the first group of air duct assemblies to turn on, and the second group of air duct assemblies to turn off.

13. The control method for the heat exchanger according to claim 10, characterized in that, The heat exchange device further includes a room temperature sensor for detecting indoor temperature, and the control method further includes: Receive the indoor temperature signal from the room temperature sensor; If the indoor temperature decreases, the regulating valve of the heat exchange equipment will reduce its opening. If the indoor temperature increases, the regulating valve is controlled to increase its opening degree.

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